net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015-2017  Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/nospec.h>
  20 #include <linux/etherdevice.h>
  21 #include <net/net_namespace.h>
  22 #include <net/genetlink.h>
  23 #include <net/cfg80211.h>
  24 #include <net/sock.h>
  25 #include <net/inet_connection_sock.h>
  26 #include "core.h"
  27 #include "nl80211.h"
  28 #include "reg.h"
  29 #include "rdev-ops.h"
  30
  31 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  32                                    struct genl_info *info,
  33                                    struct cfg80211_crypto_settings *settings,
  34                                    int cipher_limit);
  35
  36 /* the netlink family */
  37 static struct genl_family nl80211_fam;
  38
  39 /* multicast groups */
  40 enum nl80211_multicast_groups {
  41         NL80211_MCGRP_CONFIG,
  42         NL80211_MCGRP_SCAN,
  43         NL80211_MCGRP_REGULATORY,
  44         NL80211_MCGRP_MLME,
  45         NL80211_MCGRP_VENDOR,
  46         NL80211_MCGRP_NAN,
  47         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  48 };
  49
  50 static const struct genl_multicast_group nl80211_mcgrps[] = {
  51         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  52         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  53         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  54         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  55         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  56         [NL80211_MCGRP_NAN] = { .name = NL80211_MULTICAST_GROUP_NAN },
  57 #ifdef CONFIG_NL80211_TESTMODE
  58         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  59 #endif
  60 };
  61
  62 /* returns ERR_PTR values */
  63 static struct wireless_dev *
  64 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  65 {
  66         struct cfg80211_registered_device *rdev;
  67         struct wireless_dev *result = NULL;
  68         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  69         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  70         u64 wdev_id;
  71         int wiphy_idx = -1;
  72         int ifidx = -1;
  73
  74         ASSERT_RTNL();
  75
  76         if (!have_ifidx && !have_wdev_id)
  77                 return ERR_PTR(-EINVAL);
  78
  79         if (have_ifidx)
  80                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  81         if (have_wdev_id) {
  82                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  83                 wiphy_idx = wdev_id >> 32;
  84         }
  85
  86         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  87                 struct wireless_dev *wdev;
  88
  89                 if (wiphy_net(&rdev->wiphy) != netns)
  90                         continue;
  91
  92                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  93                         continue;
  94
  95                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
  96                         if (have_ifidx && wdev->netdev &&
  97                             wdev->netdev->ifindex == ifidx) {
  98                                 result = wdev;
  99                                 break;
 100                         }
 101                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 102                                 result = wdev;
 103                                 break;
 104                         }
 105                 }
 106
 107                 if (result)
 108                         break;
 109         }
 110
 111         if (result)
 112                 return result;
 113         return ERR_PTR(-ENODEV);
 114 }
 115
 116 static struct cfg80211_registered_device *
 117 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 118 {
 119         struct cfg80211_registered_device *rdev = NULL, *tmp;
 120         struct net_device *netdev;
 121
 122         ASSERT_RTNL();
 123
 124         if (!attrs[NL80211_ATTR_WIPHY] &&
 125             !attrs[NL80211_ATTR_IFINDEX] &&
 126             !attrs[NL80211_ATTR_WDEV])
 127                 return ERR_PTR(-EINVAL);
 128
 129         if (attrs[NL80211_ATTR_WIPHY])
 130                 rdev = cfg80211_rdev_by_wiphy_idx(
 131                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 132
 133         if (attrs[NL80211_ATTR_WDEV]) {
 134                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 135                 struct wireless_dev *wdev;
 136                 bool found = false;
 137
 138                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 139                 if (tmp) {
 140                         /* make sure wdev exists */
 141                         list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
 142                                 if (wdev->identifier != (u32)wdev_id)
 143                                         continue;
 144                                 found = true;
 145                                 break;
 146                         }
 147
 148                         if (!found)
 149                                 tmp = NULL;
 150
 151                         if (rdev && tmp != rdev)
 152                                 return ERR_PTR(-EINVAL);
 153                         rdev = tmp;
 154                 }
 155         }
 156
 157         if (attrs[NL80211_ATTR_IFINDEX]) {
 158                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 159
 160                 netdev = __dev_get_by_index(netns, ifindex);
 161                 if (netdev) {
 162                         if (netdev->ieee80211_ptr)
 163                                 tmp = wiphy_to_rdev(
 164                                         netdev->ieee80211_ptr->wiphy);
 165                         else
 166                                 tmp = NULL;
 167
 168                         /* not wireless device -- return error */
 169                         if (!tmp)
 170                                 return ERR_PTR(-EINVAL);
 171
 172                         /* mismatch -- return error */
 173                         if (rdev && tmp != rdev)
 174                                 return ERR_PTR(-EINVAL);
 175
 176                         rdev = tmp;
 177                 }
 178         }
 179
 180         if (!rdev)
 181                 return ERR_PTR(-ENODEV);
 182
 183         if (netns != wiphy_net(&rdev->wiphy))
 184                 return ERR_PTR(-ENODEV);
 185
 186         return rdev;
 187 }
 188
 189 /*
 190  * This function returns a pointer to the driver
 191  * that the genl_info item that is passed refers to.
 192  *
 193  * The result of this can be a PTR_ERR and hence must
 194  * be checked with IS_ERR() for errors.
 195  */
 196 static struct cfg80211_registered_device *
 197 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 198 {
 199         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 200 }
 201
 202 /* policy for the attributes */
 203 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 204         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 205         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 206                                       .len = 20-1 },
 207         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 208
 209         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 210         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 211         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 212         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 213         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 214
 215         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 216         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 217         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 218         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 219         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 220         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 221
 222         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 223         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 224         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 225
 226         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 227         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 228
 229         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 230         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 231                                     .len = WLAN_MAX_KEY_LEN },
 232         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 233         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 234         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 235         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 236         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 237
 238         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 239         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 240         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 241                                        .len = IEEE80211_MAX_DATA_LEN },
 242         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 243                                        .len = IEEE80211_MAX_DATA_LEN },
 244         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 245         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 246         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 247         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 248                                                .len = NL80211_MAX_SUPP_RATES },
 249         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 250         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 251         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 252         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 253                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 254         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 255
 256         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 257         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 258
 259         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 260         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 261         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 262         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 263                                            .len = NL80211_MAX_SUPP_RATES },
 264         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 265
 266         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 267         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 268
 269         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 270
 271         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 272         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 273                               .len = IEEE80211_MAX_DATA_LEN },
 274         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 275         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 276
 277         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 278                                 .len = IEEE80211_MAX_SSID_LEN },
 279         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 280         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 281         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 282         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 283         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 284         [NL80211_ATTR_STA_FLAGS2] = {
 285                 .len = sizeof(struct nl80211_sta_flag_update),
 286         },
 287         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 288         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 289         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 290         [NL80211_ATTR_CONTROL_PORT_OVER_NL80211] = { .type = NLA_FLAG },
 291         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 292         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 293         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 294         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 295         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 296         [NL80211_ATTR_PMKID] = { .len = WLAN_PMKID_LEN },
 297         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 298         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 299         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 300         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 301                                  .len = IEEE80211_MAX_DATA_LEN },
 302         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 303         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 304         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 305         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 306         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 307         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 308         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 309         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 310         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 311         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 312         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 313         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 314         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 316         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 317         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 318         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 319         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 320         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 321         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 322                                          .len = IEEE80211_MAX_DATA_LEN },
 323         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 324                                          .len = IEEE80211_MAX_DATA_LEN },
 325         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 328         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 329         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 330         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 331         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 334         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 335         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 336                                       .len = IEEE80211_MAX_DATA_LEN },
 337         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 338         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 339         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 340                 .len = NL80211_HT_CAPABILITY_LEN
 341         },
 342         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 343         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 344         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 345         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 346         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 347         [NL80211_ATTR_AUTH_DATA] = { .type = NLA_BINARY, },
 348         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 349         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 350         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 351         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 352         [NL80211_ATTR_LOCAL_MESH_POWER_MODE] = {. type = NLA_U32 },
 353         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 354         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 355         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 356         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 357         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 358         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 359         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 360                 .len = NL80211_VHT_CAPABILITY_LEN,
 361         },
 362         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 363         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 364                                   .len = IEEE80211_MAX_DATA_LEN },
 365         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 366         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 367         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 368         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 369         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 370         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 371         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 372         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 373         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 374         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 375         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 376         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 377         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 378         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 379                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 380         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 381         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 382         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 383         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 384         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 385         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 386         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 387         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 388         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 389         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 390         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 391         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 392         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 393         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 394         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 395         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 396         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 397         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 398         [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
 399                 .len = VHT_MUMIMO_GROUPS_DATA_LEN
 400         },
 401         [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
 402         [NL80211_ATTR_NAN_MASTER_PREF] = { .type = NLA_U8 },
 403         [NL80211_ATTR_BANDS] = { .type = NLA_U32 },
 404         [NL80211_ATTR_NAN_FUNC] = { .type = NLA_NESTED },
 405         [NL80211_ATTR_FILS_KEK] = { .type = NLA_BINARY,
 406                                     .len = FILS_MAX_KEK_LEN },
 407         [NL80211_ATTR_FILS_NONCES] = { .len = 2 * FILS_NONCE_LEN },
 408         [NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED] = { .type = NLA_FLAG, },
 409         [NL80211_ATTR_BSSID] = { .len = ETH_ALEN },
 410         [NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] = { .type = NLA_S8 },
 411         [NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST] = {
 412                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 413         },
 414         [NL80211_ATTR_TIMEOUT_REASON] = { .type = NLA_U32 },
 415         [NL80211_ATTR_FILS_ERP_USERNAME] = { .type = NLA_BINARY,
 416                                              .len = FILS_ERP_MAX_USERNAME_LEN },
 417         [NL80211_ATTR_FILS_ERP_REALM] = { .type = NLA_BINARY,
 418                                           .len = FILS_ERP_MAX_REALM_LEN },
 419         [NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] = { .type = NLA_U16 },
 420         [NL80211_ATTR_FILS_ERP_RRK] = { .type = NLA_BINARY,
 421                                         .len = FILS_ERP_MAX_RRK_LEN },
 422         [NL80211_ATTR_FILS_CACHE_ID] = { .len = 2 },
 423         [NL80211_ATTR_PMK] = { .type = NLA_BINARY, .len = PMK_MAX_LEN },
 424         [NL80211_ATTR_SCHED_SCAN_MULTI] = { .type = NLA_FLAG },
 425         [NL80211_ATTR_EXTERNAL_AUTH_SUPPORT] = { .type = NLA_FLAG },
 426 };
 427
 428 /* policy for the key attributes */
 429 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 430         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 431         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 432         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 433         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 434         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 435         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 436         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 437         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 438 };
 439
 440 /* policy for the key default flags */
 441 static const struct nla_policy
 442 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 443         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 444         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 445 };
 446
 447 #ifdef CONFIG_PM
 448 /* policy for WoWLAN attributes */
 449 static const struct nla_policy
 450 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 451         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 452         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 453         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 454         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 455         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 456         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 457         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 458         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 459         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 460         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 461 };
 462
 463 static const struct nla_policy
 464 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 465         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 466         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 467         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 468         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 469         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 470         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 471         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 472                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 473         },
 474         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 475                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 476         },
 477         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 478         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 479         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 480 };
 481 #endif /* CONFIG_PM */
 482
 483 /* policy for coalesce rule attributes */
 484 static const struct nla_policy
 485 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 486         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 487         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 488         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 489 };
 490
 491 /* policy for GTK rekey offload attributes */
 492 static const struct nla_policy
 493 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 494         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 495         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 496         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 497 };
 498
 499 static const struct nla_policy
 500 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 501         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 502                                                  .len = IEEE80211_MAX_SSID_LEN },
 503         [NL80211_SCHED_SCAN_MATCH_ATTR_BSSID] = { .len = ETH_ALEN },
 504         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 505 };
 506
 507 static const struct nla_policy
 508 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 509         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 510         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 511 };
 512
 513 static const struct nla_policy
 514 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 515         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 516         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 517         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 518                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 519         },
 520 };
 521
 522 /* policy for NAN function attributes */
 523 static const struct nla_policy
 524 nl80211_nan_func_policy[NL80211_NAN_FUNC_ATTR_MAX + 1] = {
 525         [NL80211_NAN_FUNC_TYPE] = { .type = NLA_U8 },
 526         [NL80211_NAN_FUNC_SERVICE_ID] = {
 527                                     .len = NL80211_NAN_FUNC_SERVICE_ID_LEN },
 528         [NL80211_NAN_FUNC_PUBLISH_TYPE] = { .type = NLA_U8 },
 529         [NL80211_NAN_FUNC_PUBLISH_BCAST] = { .type = NLA_FLAG },
 530         [NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE] = { .type = NLA_FLAG },
 531         [NL80211_NAN_FUNC_FOLLOW_UP_ID] = { .type = NLA_U8 },
 532         [NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] = { .type = NLA_U8 },
 533         [NL80211_NAN_FUNC_FOLLOW_UP_DEST] = { .len = ETH_ALEN },
 534         [NL80211_NAN_FUNC_CLOSE_RANGE] = { .type = NLA_FLAG },
 535         [NL80211_NAN_FUNC_TTL] = { .type = NLA_U32 },
 536         [NL80211_NAN_FUNC_SERVICE_INFO] = { .type = NLA_BINARY,
 537                         .len = NL80211_NAN_FUNC_SERVICE_SPEC_INFO_MAX_LEN },
 538         [NL80211_NAN_FUNC_SRF] = { .type = NLA_NESTED },
 539         [NL80211_NAN_FUNC_RX_MATCH_FILTER] = { .type = NLA_NESTED },
 540         [NL80211_NAN_FUNC_TX_MATCH_FILTER] = { .type = NLA_NESTED },
 541         [NL80211_NAN_FUNC_INSTANCE_ID] = { .type = NLA_U8 },
 542         [NL80211_NAN_FUNC_TERM_REASON] = { .type = NLA_U8 },
 543 };
 544
 545 /* policy for Service Response Filter attributes */
 546 static const struct nla_policy
 547 nl80211_nan_srf_policy[NL80211_NAN_SRF_ATTR_MAX + 1] = {
 548         [NL80211_NAN_SRF_INCLUDE] = { .type = NLA_FLAG },
 549         [NL80211_NAN_SRF_BF] = { .type = NLA_BINARY,
 550                                  .len =  NL80211_NAN_FUNC_SRF_MAX_LEN },
 551         [NL80211_NAN_SRF_BF_IDX] = { .type = NLA_U8 },
 552         [NL80211_NAN_SRF_MAC_ADDRS] = { .type = NLA_NESTED },
 553 };
 554
 555 /* policy for packet pattern attributes */
 556 static const struct nla_policy
 557 nl80211_packet_pattern_policy[MAX_NL80211_PKTPAT + 1] = {
 558         [NL80211_PKTPAT_MASK] = { .type = NLA_BINARY, },
 559         [NL80211_PKTPAT_PATTERN] = { .type = NLA_BINARY, },
 560         [NL80211_PKTPAT_OFFSET] = { .type = NLA_U32 },
 561 };
 562
 563 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 564                                      struct netlink_callback *cb,
 565                                      struct cfg80211_registered_device **rdev,
 566                                      struct wireless_dev **wdev)
 567 {
 568         int err;
 569
 570         if (!cb->args[0]) {
 571                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 572                                   genl_family_attrbuf(&nl80211_fam),
 573                                   nl80211_fam.maxattr, nl80211_policy, NULL);
 574                 if (err)
 575                         return err;
 576
 577                 *wdev = __cfg80211_wdev_from_attrs(
 578                                         sock_net(skb->sk),
 579                                         genl_family_attrbuf(&nl80211_fam));
 580                 if (IS_ERR(*wdev))
 581                         return PTR_ERR(*wdev);
 582                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 583                 /* 0 is the first index - add 1 to parse only once */
 584                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 585                 cb->args[1] = (*wdev)->identifier;
 586         } else {
 587                 /* subtract the 1 again here */
 588                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 589                 struct wireless_dev *tmp;
 590
 591                 if (!wiphy)
 592                         return -ENODEV;
 593                 *rdev = wiphy_to_rdev(wiphy);
 594                 *wdev = NULL;
 595
 596                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 597                         if (tmp->identifier == cb->args[1]) {
 598                                 *wdev = tmp;
 599                                 break;
 600                         }
 601                 }
 602
 603                 if (!*wdev)
 604                         return -ENODEV;
 605         }
 606
 607         return 0;
 608 }
 609
 610 /* IE validation */
 611 static bool is_valid_ie_attr(const struct nlattr *attr)
 612 {
 613         const u8 *pos;
 614         int len;
 615
 616         if (!attr)
 617                 return true;
 618
 619         pos = nla_data(attr);
 620         len = nla_len(attr);
 621
 622         while (len) {
 623                 u8 elemlen;
 624
 625                 if (len < 2)
 626                         return false;
 627                 len -= 2;
 628
 629                 elemlen = pos[1];
 630                 if (elemlen > len)
 631                         return false;
 632
 633                 len -= elemlen;
 634                 pos += 2 + elemlen;
 635         }
 636
 637         return true;
 638 }
 639
 640 /* message building helper */
 641 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 642                                    int flags, u8 cmd)
 643 {
 644         /* since there is no private header just add the generic one */
 645         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 646 }
 647
 648 static int nl80211_msg_put_channel(struct sk_buff *msg,
 649                                    struct ieee80211_channel *chan,
 650                                    bool large)
 651 {
 652         /* Some channels must be completely excluded from the
 653          * list to protect old user-space tools from breaking
 654          */
 655         if (!large && chan->flags &
 656             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 657                 return 0;
 658
 659         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 660                         chan->center_freq))
 661                 goto nla_put_failure;
 662
 663         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 664             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 665                 goto nla_put_failure;
 666         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 667                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 668                         goto nla_put_failure;
 669                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 670                         goto nla_put_failure;
 671         }
 672         if (chan->flags & IEEE80211_CHAN_RADAR) {
 673                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 674                         goto nla_put_failure;
 675                 if (large) {
 676                         u32 time;
 677
 678                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 679
 680                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 681                                         chan->dfs_state))
 682                                 goto nla_put_failure;
 683                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 684                                         time))
 685                                 goto nla_put_failure;
 686                         if (nla_put_u32(msg,
 687                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 688                                         chan->dfs_cac_ms))
 689                                 goto nla_put_failure;
 690                 }
 691         }
 692
 693         if (large) {
 694                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 695                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 696                         goto nla_put_failure;
 697                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 698                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 699                         goto nla_put_failure;
 700                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 701                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 702                         goto nla_put_failure;
 703                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 704                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 705                         goto nla_put_failure;
 706                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 707                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 708                         goto nla_put_failure;
 709                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 710                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 711                         goto nla_put_failure;
 712                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 713                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 714                         goto nla_put_failure;
 715                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 716                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 717                         goto nla_put_failure;
 718         }
 719
 720         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 721                         DBM_TO_MBM(chan->max_power)))
 722                 goto nla_put_failure;
 723
 724         return 0;
 725
 726  nla_put_failure:
 727         return -ENOBUFS;
 728 }
 729
 730 /* netlink command implementations */
 731
 732 struct key_parse {
 733         struct key_params p;
 734         int idx;
 735         int type;
 736         bool def, defmgmt;
 737         bool def_uni, def_multi;
 738 };
 739
 740 static int nl80211_parse_key_new(struct genl_info *info, struct nlattr *key,
 741                                  struct key_parse *k)
 742 {
 743         struct nlattr *tb[NL80211_KEY_MAX + 1];
 744         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 745                                    nl80211_key_policy, info->extack);
 746         if (err)
 747                 return err;
 748
 749         k->def = !!tb[NL80211_KEY_DEFAULT];
 750         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 751
 752         if (k->def) {
 753                 k->def_uni = true;
 754                 k->def_multi = true;
 755         }
 756         if (k->defmgmt)
 757                 k->def_multi = true;
 758
 759         if (tb[NL80211_KEY_IDX])
 760                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 761
 762         if (tb[NL80211_KEY_DATA]) {
 763                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 764                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 765         }
 766
 767         if (tb[NL80211_KEY_SEQ]) {
 768                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 769                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 770         }
 771
 772         if (tb[NL80211_KEY_CIPHER])
 773                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 774
 775         if (tb[NL80211_KEY_TYPE]) {
 776                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 777                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 778                         return genl_err_attr(info, -EINVAL,
 779                                              tb[NL80211_KEY_TYPE]);
 780         }
 781
 782         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 783                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 784
 785                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 786                                        tb[NL80211_KEY_DEFAULT_TYPES],
 787                                        nl80211_key_default_policy,
 788                                        info->extack);
 789                 if (err)
 790                         return err;
 791
 792                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 793                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 794         }
 795
 796         return 0;
 797 }
 798
 799 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 800 {
 801         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 802                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 803                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 804         }
 805
 806         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 807                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 808                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 809         }
 810
 811         if (info->attrs[NL80211_ATTR_KEY_IDX])
 812                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 813
 814         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 815                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 816
 817         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 818         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 819
 820         if (k->def) {
 821                 k->def_uni = true;
 822                 k->def_multi = true;
 823         }
 824         if (k->defmgmt)
 825                 k->def_multi = true;
 826
 827         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 828                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 829                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES) {
 830                         GENL_SET_ERR_MSG(info, "key type out of range");
 831                         return -EINVAL;
 832                 }
 833         }
 834
 835         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 836                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 837                 int err = nla_parse_nested(kdt,
 838                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 839                                            info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 840                                            nl80211_key_default_policy,
 841                                            info->extack);
 842                 if (err)
 843                         return err;
 844
 845                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 846                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 847         }
 848
 849         return 0;
 850 }
 851
 852 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 853 {
 854         int err;
 855
 856         memset(k, 0, sizeof(*k));
 857         k->idx = -1;
 858         k->type = -1;
 859
 860         if (info->attrs[NL80211_ATTR_KEY])
 861                 err = nl80211_parse_key_new(info, info->attrs[NL80211_ATTR_KEY], k);
 862         else
 863                 err = nl80211_parse_key_old(info, k);
 864
 865         if (err)
 866                 return err;
 867
 868         if (k->def && k->defmgmt) {
 869                 GENL_SET_ERR_MSG(info, "key with def && defmgmt is invalid");
 870                 return -EINVAL;
 871         }
 872
 873         if (k->defmgmt) {
 874                 if (k->def_uni || !k->def_multi) {
 875                         GENL_SET_ERR_MSG(info, "defmgmt key must be mcast");
 876                         return -EINVAL;
 877                 }
 878         }
 879
 880         if (k->idx != -1) {
 881                 if (k->defmgmt) {
 882                         if (k->idx < 4 || k->idx > 5) {
 883                                 GENL_SET_ERR_MSG(info,
 884                                                  "defmgmt key idx not 4 or 5");
 885                                 return -EINVAL;
 886                         }
 887                 } else if (k->def) {
 888                         if (k->idx < 0 || k->idx > 3) {
 889                                 GENL_SET_ERR_MSG(info, "def key idx not 0-3");
 890                                 return -EINVAL;
 891                         }
 892                 } else {
 893                         if (k->idx < 0 || k->idx > 5) {
 894                                 GENL_SET_ERR_MSG(info, "key idx not 0-5");
 895                                 return -EINVAL;
 896                         }
 897                 }
 898         }
 899
 900         return 0;
 901 }
 902
 903 static struct cfg80211_cached_keys *
 904 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 905                        struct genl_info *info, bool *no_ht)
 906 {
 907         struct nlattr *keys = info->attrs[NL80211_ATTR_KEYS];
 908         struct key_parse parse;
 909         struct nlattr *key;
 910         struct cfg80211_cached_keys *result;
 911         int rem, err, def = 0;
 912         bool have_key = false;
 913
 914         nla_for_each_nested(key, keys, rem) {
 915                 have_key = true;
 916                 break;
 917         }
 918
 919         if (!have_key)
 920                 return NULL;
 921
 922         result = kzalloc(sizeof(*result), GFP_KERNEL);
 923         if (!result)
 924                 return ERR_PTR(-ENOMEM);
 925
 926         result->def = -1;
 927
 928         nla_for_each_nested(key, keys, rem) {
 929                 memset(&parse, 0, sizeof(parse));
 930                 parse.idx = -1;
 931
 932                 err = nl80211_parse_key_new(info, key, &parse);
 933                 if (err)
 934                         goto error;
 935                 err = -EINVAL;
 936                 if (!parse.p.key)
 937                         goto error;
 938                 if (parse.idx < 0 || parse.idx > 3) {
 939                         GENL_SET_ERR_MSG(info, "key index out of range [0-3]");
 940                         goto error;
 941                 }
 942                 if (parse.def) {
 943                         if (def) {
 944                                 GENL_SET_ERR_MSG(info,
 945                                                  "only one key can be default");
 946                                 goto error;
 947                         }
 948                         def = 1;
 949                         result->def = parse.idx;
 950                         if (!parse.def_uni || !parse.def_multi)
 951                                 goto error;
 952                 } else if (parse.defmgmt)
 953                         goto error;
 954                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 955                                                      parse.idx, false, NULL);
 956                 if (err)
 957                         goto error;
 958                 if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 959                     parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
 960                         GENL_SET_ERR_MSG(info, "connect key must be WEP");
 961                         err = -EINVAL;
 962                         goto error;
 963                 }
 964                 result->params[parse.idx].cipher = parse.p.cipher;
 965                 result->params[parse.idx].key_len = parse.p.key_len;
 966                 result->params[parse.idx].key = result->data[parse.idx];
 967                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 968
 969                 /* must be WEP key if we got here */
 970                 if (no_ht)
 971                         *no_ht = true;
 972         }
 973
 974         if (result->def < 0) {
 975                 err = -EINVAL;
 976                 GENL_SET_ERR_MSG(info, "need a default/TX key");
 977                 goto error;
 978         }
 979
 980         return result;
 981  error:
 982         kfree(result);
 983         return ERR_PTR(err);
 984 }
 985
 986 static int nl80211_key_allowed(struct wireless_dev *wdev)
 987 {
 988         ASSERT_WDEV_LOCK(wdev);
 989
 990         switch (wdev->iftype) {
 991         case NL80211_IFTYPE_AP:
 992         case NL80211_IFTYPE_AP_VLAN:
 993         case NL80211_IFTYPE_P2P_GO:
 994         case NL80211_IFTYPE_MESH_POINT:
 995                 break;
 996         case NL80211_IFTYPE_ADHOC:
 997         case NL80211_IFTYPE_STATION:
 998         case NL80211_IFTYPE_P2P_CLIENT:
 999                 if (!wdev->current_bss)
1000                         return -ENOLINK;
1001                 break;
1002         case NL80211_IFTYPE_UNSPECIFIED:
1003         case NL80211_IFTYPE_OCB:
1004         case NL80211_IFTYPE_MONITOR:
1005         case NL80211_IFTYPE_NAN:
1006         case NL80211_IFTYPE_P2P_DEVICE:
1007         case NL80211_IFTYPE_WDS:
1008         case NUM_NL80211_IFTYPES:
1009                 return -EINVAL;
1010         }
1011
1012         return 0;
1013 }
1014
1015 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
1016                                                         struct nlattr *tb)
1017 {
1018         struct ieee80211_channel *chan;
1019
1020         if (tb == NULL)
1021                 return NULL;
1022         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
1023         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
1024                 return NULL;
1025         return chan;
1026 }
1027
1028 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
1029 {
1030         struct nlattr *nl_modes = nla_nest_start(msg, attr);
1031         int i;
1032
1033         if (!nl_modes)
1034                 goto nla_put_failure;
1035
1036         i = 0;
1037         while (ifmodes) {
1038                 if ((ifmodes & 1) && nla_put_flag(msg, i))
1039                         goto nla_put_failure;
1040                 ifmodes >>= 1;
1041                 i++;
1042         }
1043
1044         nla_nest_end(msg, nl_modes);
1045         return 0;
1046
1047 nla_put_failure:
1048         return -ENOBUFS;
1049 }
1050
1051 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
1052                                           struct sk_buff *msg,
1053                                           bool large)
1054 {
1055         struct nlattr *nl_combis;
1056         int i, j;
1057
1058         nl_combis = nla_nest_start(msg,
1059                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
1060         if (!nl_combis)
1061                 goto nla_put_failure;
1062
1063         for (i = 0; i < wiphy->n_iface_combinations; i++) {
1064                 const struct ieee80211_iface_combination *c;
1065                 struct nlattr *nl_combi, *nl_limits;
1066
1067                 c = &wiphy->iface_combinations[i];
1068
1069                 nl_combi = nla_nest_start(msg, i + 1);
1070                 if (!nl_combi)
1071                         goto nla_put_failure;
1072
1073                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
1074                 if (!nl_limits)
1075                         goto nla_put_failure;
1076
1077                 for (j = 0; j < c->n_limits; j++) {
1078                         struct nlattr *nl_limit;
1079
1080                         nl_limit = nla_nest_start(msg, j + 1);
1081                         if (!nl_limit)
1082                                 goto nla_put_failure;
1083                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1084                                         c->limits[j].max))
1085                                 goto nla_put_failure;
1086                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1087                                                 c->limits[j].types))
1088                                 goto nla_put_failure;
1089                         nla_nest_end(msg, nl_limit);
1090                 }
1091
1092                 nla_nest_end(msg, nl_limits);
1093
1094                 if (c->beacon_int_infra_match &&
1095                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1096                         goto nla_put_failure;
1097                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1098                                 c->num_different_channels) ||
1099                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1100                                 c->max_interfaces))
1101                         goto nla_put_failure;
1102                 if (large &&
1103                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1104                                 c->radar_detect_widths) ||
1105                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1106                                 c->radar_detect_regions)))
1107                         goto nla_put_failure;
1108                 if (c->beacon_int_min_gcd &&
1109                     nla_put_u32(msg, NL80211_IFACE_COMB_BI_MIN_GCD,
1110                                 c->beacon_int_min_gcd))
1111                         goto nla_put_failure;
1112
1113                 nla_nest_end(msg, nl_combi);
1114         }
1115
1116         nla_nest_end(msg, nl_combis);
1117
1118         return 0;
1119 nla_put_failure:
1120         return -ENOBUFS;
1121 }
1122
1123 #ifdef CONFIG_PM
1124 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1125                                         struct sk_buff *msg)
1126 {
1127         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1128         struct nlattr *nl_tcp;
1129
1130         if (!tcp)
1131                 return 0;
1132
1133         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1134         if (!nl_tcp)
1135                 return -ENOBUFS;
1136
1137         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1138                         tcp->data_payload_max))
1139                 return -ENOBUFS;
1140
1141         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1142                         tcp->data_payload_max))
1143                 return -ENOBUFS;
1144
1145         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1146                 return -ENOBUFS;
1147
1148         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1149                                 sizeof(*tcp->tok), tcp->tok))
1150                 return -ENOBUFS;
1151
1152         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1153                         tcp->data_interval_max))
1154                 return -ENOBUFS;
1155
1156         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1157                         tcp->wake_payload_max))
1158                 return -ENOBUFS;
1159
1160         nla_nest_end(msg, nl_tcp);
1161         return 0;
1162 }
1163
1164 static int nl80211_send_wowlan(struct sk_buff *msg,
1165                                struct cfg80211_registered_device *rdev,
1166                                bool large)
1167 {
1168         struct nlattr *nl_wowlan;
1169
1170         if (!rdev->wiphy.wowlan)
1171                 return 0;
1172
1173         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1174         if (!nl_wowlan)
1175                 return -ENOBUFS;
1176
1177         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1178              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1179             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1180              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1181             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1182              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1183             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1184              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1185             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1186              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1187             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1188              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1189             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1190              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1191             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1192              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1193                 return -ENOBUFS;
1194
1195         if (rdev->wiphy.wowlan->n_patterns) {
1196                 struct nl80211_pattern_support pat = {
1197                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1198                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1199                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1200                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1201                 };
1202
1203                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1204                             sizeof(pat), &pat))
1205                         return -ENOBUFS;
1206         }
1207
1208         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1209             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1210                         rdev->wiphy.wowlan->max_nd_match_sets))
1211                 return -ENOBUFS;
1212
1213         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1214                 return -ENOBUFS;
1215
1216         nla_nest_end(msg, nl_wowlan);
1217
1218         return 0;
1219 }
1220 #endif
1221
1222 static int nl80211_send_coalesce(struct sk_buff *msg,
1223                                  struct cfg80211_registered_device *rdev)
1224 {
1225         struct nl80211_coalesce_rule_support rule;
1226
1227         if (!rdev->wiphy.coalesce)
1228                 return 0;
1229
1230         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1231         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1232         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1233         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1234         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1235         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1236
1237         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1238                 return -ENOBUFS;
1239
1240         return 0;
1241 }
1242
1243 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1244                                       struct ieee80211_supported_band *sband)
1245 {
1246         struct nlattr *nl_rates, *nl_rate;
1247         struct ieee80211_rate *rate;
1248         int i;
1249
1250         /* add HT info */
1251         if (sband->ht_cap.ht_supported &&
1252             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1253                      sizeof(sband->ht_cap.mcs),
1254                      &sband->ht_cap.mcs) ||
1255              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1256                          sband->ht_cap.cap) ||
1257              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1258                         sband->ht_cap.ampdu_factor) ||
1259              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1260                         sband->ht_cap.ampdu_density)))
1261                 return -ENOBUFS;
1262
1263         /* add VHT info */
1264         if (sband->vht_cap.vht_supported &&
1265             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1266                      sizeof(sband->vht_cap.vht_mcs),
1267                      &sband->vht_cap.vht_mcs) ||
1268              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1269                          sband->vht_cap.cap)))
1270                 return -ENOBUFS;
1271
1272         /* add bitrates */
1273         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1274         if (!nl_rates)
1275                 return -ENOBUFS;
1276
1277         for (i = 0; i < sband->n_bitrates; i++) {
1278                 nl_rate = nla_nest_start(msg, i);
1279                 if (!nl_rate)
1280                         return -ENOBUFS;
1281
1282                 rate = &sband->bitrates[i];
1283                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1284                                 rate->bitrate))
1285                         return -ENOBUFS;
1286                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1287                     nla_put_flag(msg,
1288                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1289                         return -ENOBUFS;
1290
1291                 nla_nest_end(msg, nl_rate);
1292         }
1293
1294         nla_nest_end(msg, nl_rates);
1295
1296         return 0;
1297 }
1298
1299 static int
1300 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1301                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1302 {
1303         u16 stypes;
1304         struct nlattr *nl_ftypes, *nl_ifs;
1305         enum nl80211_iftype ift;
1306         int i;
1307
1308         if (!mgmt_stypes)
1309                 return 0;
1310
1311         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1312         if (!nl_ifs)
1313                 return -ENOBUFS;
1314
1315         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1316                 nl_ftypes = nla_nest_start(msg, ift);
1317                 if (!nl_ftypes)
1318                         return -ENOBUFS;
1319                 i = 0;
1320                 stypes = mgmt_stypes[ift].tx;
1321                 while (stypes) {
1322                         if ((stypes & 1) &&
1323                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1324                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1325                                 return -ENOBUFS;
1326                         stypes >>= 1;
1327                         i++;
1328                 }
1329                 nla_nest_end(msg, nl_ftypes);
1330         }
1331
1332         nla_nest_end(msg, nl_ifs);
1333
1334         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1335         if (!nl_ifs)
1336                 return -ENOBUFS;
1337
1338         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1339                 nl_ftypes = nla_nest_start(msg, ift);
1340                 if (!nl_ftypes)
1341                         return -ENOBUFS;
1342                 i = 0;
1343                 stypes = mgmt_stypes[ift].rx;
1344                 while (stypes) {
1345                         if ((stypes & 1) &&
1346                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1347                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1348                                 return -ENOBUFS;
1349                         stypes >>= 1;
1350                         i++;
1351                 }
1352                 nla_nest_end(msg, nl_ftypes);
1353         }
1354         nla_nest_end(msg, nl_ifs);
1355
1356         return 0;
1357 }
1358
1359 #define CMD(op, n)                                                      \
1360          do {                                                           \
1361                 if (rdev->ops->op) {                                    \
1362                         i++;                                            \
1363                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n))     \
1364                                 goto nla_put_failure;                   \
1365                 }                                                       \
1366         } while (0)
1367
1368 static int nl80211_add_commands_unsplit(struct cfg80211_registered_device *rdev,
1369                                         struct sk_buff *msg)
1370 {
1371         int i = 0;
1372
1373         /*
1374          * do *NOT* add anything into this function, new things need to be
1375          * advertised only to new versions of userspace that can deal with
1376          * the split (and they can't possibly care about new features...
1377          */
1378         CMD(add_virtual_intf, NEW_INTERFACE);
1379         CMD(change_virtual_intf, SET_INTERFACE);
1380         CMD(add_key, NEW_KEY);
1381         CMD(start_ap, START_AP);
1382         CMD(add_station, NEW_STATION);
1383         CMD(add_mpath, NEW_MPATH);
1384         CMD(update_mesh_config, SET_MESH_CONFIG);
1385         CMD(change_bss, SET_BSS);
1386         CMD(auth, AUTHENTICATE);
1387         CMD(assoc, ASSOCIATE);
1388         CMD(deauth, DEAUTHENTICATE);
1389         CMD(disassoc, DISASSOCIATE);
1390         CMD(join_ibss, JOIN_IBSS);
1391         CMD(join_mesh, JOIN_MESH);
1392         CMD(set_pmksa, SET_PMKSA);
1393         CMD(del_pmksa, DEL_PMKSA);
1394         CMD(flush_pmksa, FLUSH_PMKSA);
1395         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1396                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1397         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1398         CMD(mgmt_tx, FRAME);
1399         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1400         if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1401                 i++;
1402                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1403                         goto nla_put_failure;
1404         }
1405         if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1406             rdev->ops->join_mesh) {
1407                 i++;
1408                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1409                         goto nla_put_failure;
1410         }
1411         CMD(set_wds_peer, SET_WDS_PEER);
1412         if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1413                 CMD(tdls_mgmt, TDLS_MGMT);
1414                 CMD(tdls_oper, TDLS_OPER);
1415         }
1416         if (rdev->wiphy.max_sched_scan_reqs)
1417                 CMD(sched_scan_start, START_SCHED_SCAN);
1418         CMD(probe_client, PROBE_CLIENT);
1419         CMD(set_noack_map, SET_NOACK_MAP);
1420         if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1421                 i++;
1422                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1423                         goto nla_put_failure;
1424         }
1425         CMD(start_p2p_device, START_P2P_DEVICE);
1426         CMD(set_mcast_rate, SET_MCAST_RATE);
1427 #ifdef CONFIG_NL80211_TESTMODE
1428         CMD(testmode_cmd, TESTMODE);
1429 #endif
1430
1431         if (rdev->ops->connect || rdev->ops->auth) {
1432                 i++;
1433                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1434                         goto nla_put_failure;
1435         }
1436
1437         if (rdev->ops->disconnect || rdev->ops->deauth) {
1438                 i++;
1439                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1440                         goto nla_put_failure;
1441         }
1442
1443         return i;
1444  nla_put_failure:
1445         return -ENOBUFS;
1446 }
1447
1448 struct nl80211_dump_wiphy_state {
1449         s64 filter_wiphy;
1450         long start;
1451         long split_start, band_start, chan_start, capa_start;
1452         bool split;
1453 };
1454
1455 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1456                               enum nl80211_commands cmd,
1457                               struct sk_buff *msg, u32 portid, u32 seq,
1458                               int flags, struct nl80211_dump_wiphy_state *state)
1459 {
1460         void *hdr;
1461         struct nlattr *nl_bands, *nl_band;
1462         struct nlattr *nl_freqs, *nl_freq;
1463         struct nlattr *nl_cmds;
1464         enum nl80211_band band;
1465         struct ieee80211_channel *chan;
1466         int i;
1467         const struct ieee80211_txrx_stypes *mgmt_stypes =
1468                                 rdev->wiphy.mgmt_stypes;
1469         u32 features;
1470
1471         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1472         if (!hdr)
1473                 return -ENOBUFS;
1474
1475         if (WARN_ON(!state))
1476                 return -EINVAL;
1477
1478         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1479             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1480                            wiphy_name(&rdev->wiphy)) ||
1481             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1482                         cfg80211_rdev_list_generation))
1483                 goto nla_put_failure;
1484
1485         if (cmd != NL80211_CMD_NEW_WIPHY)
1486                 goto finish;
1487
1488         switch (state->split_start) {
1489         case 0:
1490                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1491                                rdev->wiphy.retry_short) ||
1492                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1493                                rdev->wiphy.retry_long) ||
1494                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1495                                 rdev->wiphy.frag_threshold) ||
1496                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1497                                 rdev->wiphy.rts_threshold) ||
1498                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1499                                rdev->wiphy.coverage_class) ||
1500                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1501                                rdev->wiphy.max_scan_ssids) ||
1502                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1503                                rdev->wiphy.max_sched_scan_ssids) ||
1504                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1505                                 rdev->wiphy.max_scan_ie_len) ||
1506                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1507                                 rdev->wiphy.max_sched_scan_ie_len) ||
1508                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1509                                rdev->wiphy.max_match_sets) ||
1510                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1511                                 rdev->wiphy.max_sched_scan_plans) ||
1512                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1513                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1514                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1515                                 rdev->wiphy.max_sched_scan_plan_iterations))
1516                         goto nla_put_failure;
1517
1518                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1519                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1520                         goto nla_put_failure;
1521                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1522                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1523                         goto nla_put_failure;
1524                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1525                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1526                         goto nla_put_failure;
1527                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1528                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1529                         goto nla_put_failure;
1530                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1531                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1532                         goto nla_put_failure;
1533                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1534                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1535                         goto nla_put_failure;
1536                 state->split_start++;
1537                 if (state->split)
1538                         break;
1539         case 1:
1540                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1541                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1542                             rdev->wiphy.cipher_suites))
1543                         goto nla_put_failure;
1544
1545                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1546                                rdev->wiphy.max_num_pmkids))
1547                         goto nla_put_failure;
1548
1549                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1550                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1551                         goto nla_put_failure;
1552
1553                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1554                                 rdev->wiphy.available_antennas_tx) ||
1555                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1556                                 rdev->wiphy.available_antennas_rx))
1557                         goto nla_put_failure;
1558
1559                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1560                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1561                                 rdev->wiphy.probe_resp_offload))
1562                         goto nla_put_failure;
1563
1564                 if ((rdev->wiphy.available_antennas_tx ||
1565                      rdev->wiphy.available_antennas_rx) &&
1566                     rdev->ops->get_antenna) {
1567                         u32 tx_ant = 0, rx_ant = 0;
1568                         int res;
1569
1570                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1571                         if (!res) {
1572                                 if (nla_put_u32(msg,
1573                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1574                                                 tx_ant) ||
1575                                     nla_put_u32(msg,
1576                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1577                                                 rx_ant))
1578                                         goto nla_put_failure;
1579                         }
1580                 }
1581
1582                 state->split_start++;
1583                 if (state->split)
1584                         break;
1585         case 2:
1586                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1587                                         rdev->wiphy.interface_modes))
1588                                 goto nla_put_failure;
1589                 state->split_start++;
1590                 if (state->split)
1591                         break;
1592         case 3:
1593                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1594                 if (!nl_bands)
1595                         goto nla_put_failure;
1596
1597                 for (band = state->band_start;
1598                      band < NUM_NL80211_BANDS; band++) {
1599                         struct ieee80211_supported_band *sband;
1600
1601                         sband = rdev->wiphy.bands[band];
1602
1603                         if (!sband)
1604                                 continue;
1605
1606                         nl_band = nla_nest_start(msg, band);
1607                         if (!nl_band)
1608                                 goto nla_put_failure;
1609
1610                         switch (state->chan_start) {
1611                         case 0:
1612                                 if (nl80211_send_band_rateinfo(msg, sband))
1613                                         goto nla_put_failure;
1614                                 state->chan_start++;
1615                                 if (state->split)
1616                                         break;
1617                         default:
1618                                 /* add frequencies */
1619                                 nl_freqs = nla_nest_start(
1620                                         msg, NL80211_BAND_ATTR_FREQS);
1621                                 if (!nl_freqs)
1622                                         goto nla_put_failure;
1623
1624                                 for (i = state->chan_start - 1;
1625                                      i < sband->n_channels;
1626                                      i++) {
1627                                         nl_freq = nla_nest_start(msg, i);
1628                                         if (!nl_freq)
1629                                                 goto nla_put_failure;
1630
1631                                         chan = &sband->channels[i];
1632
1633                                         if (nl80211_msg_put_channel(
1634                                                         msg, chan,
1635                                                         state->split))
1636                                                 goto nla_put_failure;
1637
1638                                         nla_nest_end(msg, nl_freq);
1639                                         if (state->split)
1640                                                 break;
1641                                 }
1642                                 if (i < sband->n_channels)
1643                                         state->chan_start = i + 2;
1644                                 else
1645                                         state->chan_start = 0;
1646                                 nla_nest_end(msg, nl_freqs);
1647                         }
1648
1649                         nla_nest_end(msg, nl_band);
1650
1651                         if (state->split) {
1652                                 /* start again here */
1653                                 if (state->chan_start)
1654                                         band--;
1655                                 break;
1656                         }
1657                 }
1658                 nla_nest_end(msg, nl_bands);
1659
1660                 if (band < NUM_NL80211_BANDS)
1661                         state->band_start = band + 1;
1662                 else
1663                         state->band_start = 0;
1664
1665                 /* if bands & channels are done, continue outside */
1666                 if (state->band_start == 0 && state->chan_start == 0)
1667                         state->split_start++;
1668                 if (state->split)
1669                         break;
1670         case 4:
1671                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1672                 if (!nl_cmds)
1673                         goto nla_put_failure;
1674
1675                 i = nl80211_add_commands_unsplit(rdev, msg);
1676                 if (i < 0)
1677                         goto nla_put_failure;
1678                 if (state->split) {
1679                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1680                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1681                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1682                                 CMD(channel_switch, CHANNEL_SWITCH);
1683                         CMD(set_qos_map, SET_QOS_MAP);
1684                         if (rdev->wiphy.features &
1685                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1686                                 CMD(add_tx_ts, ADD_TX_TS);
1687                         CMD(set_multicast_to_unicast, SET_MULTICAST_TO_UNICAST);
1688                         CMD(update_connect_params, UPDATE_CONNECT_PARAMS);
1689                 }
1690 #undef CMD
1691
1692                 nla_nest_end(msg, nl_cmds);
1693                 state->split_start++;
1694                 if (state->split)
1695                         break;
1696         case 5:
1697                 if (rdev->ops->remain_on_channel &&
1698                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1699                     nla_put_u32(msg,
1700                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1701                                 rdev->wiphy.max_remain_on_channel_duration))
1702                         goto nla_put_failure;
1703
1704                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1705                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1706                         goto nla_put_failure;
1707
1708                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1709                         goto nla_put_failure;
1710                 state->split_start++;
1711                 if (state->split)
1712                         break;
1713         case 6:
1714 #ifdef CONFIG_PM
1715                 if (nl80211_send_wowlan(msg, rdev, state->split))
1716                         goto nla_put_failure;
1717                 state->split_start++;
1718                 if (state->split)
1719                         break;
1720 #else
1721                 state->split_start++;
1722 #endif
1723         case 7:
1724                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1725                                         rdev->wiphy.software_iftypes))
1726                         goto nla_put_failure;
1727
1728                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1729                                                    state->split))
1730                         goto nla_put_failure;
1731
1732                 state->split_start++;
1733                 if (state->split)
1734                         break;
1735         case 8:
1736                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1737                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1738                                 rdev->wiphy.ap_sme_capa))
1739                         goto nla_put_failure;
1740
1741                 features = rdev->wiphy.features;
1742                 /*
1743                  * We can only add the per-channel limit information if the
1744                  * dump is split, otherwise it makes it too big. Therefore
1745                  * only advertise it in that case.
1746                  */
1747                 if (state->split)
1748                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1749                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1750                         goto nla_put_failure;
1751
1752                 if (rdev->wiphy.ht_capa_mod_mask &&
1753                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1754                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1755                             rdev->wiphy.ht_capa_mod_mask))
1756                         goto nla_put_failure;
1757
1758                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1759                     rdev->wiphy.max_acl_mac_addrs &&
1760                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1761                                 rdev->wiphy.max_acl_mac_addrs))
1762                         goto nla_put_failure;
1763
1764                 /*
1765                  * Any information below this point is only available to
1766                  * applications that can deal with it being split. This
1767                  * helps ensure that newly added capabilities don't break
1768                  * older tools by overrunning their buffers.
1769                  *
1770                  * We still increment split_start so that in the split
1771                  * case we'll continue with more data in the next round,
1772                  * but break unconditionally so unsplit data stops here.
1773                  */
1774                 state->split_start++;
1775                 break;
1776         case 9:
1777                 if (rdev->wiphy.extended_capabilities &&
1778                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1779                              rdev->wiphy.extended_capabilities_len,
1780                              rdev->wiphy.extended_capabilities) ||
1781                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1782                              rdev->wiphy.extended_capabilities_len,
1783                              rdev->wiphy.extended_capabilities_mask)))
1784                         goto nla_put_failure;
1785
1786                 if (rdev->wiphy.vht_capa_mod_mask &&
1787                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1788                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1789                             rdev->wiphy.vht_capa_mod_mask))
1790                         goto nla_put_failure;
1791
1792                 state->split_start++;
1793                 break;
1794         case 10:
1795                 if (nl80211_send_coalesce(msg, rdev))
1796                         goto nla_put_failure;
1797
1798                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1799                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1800                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1801                         goto nla_put_failure;
1802
1803                 if (rdev->wiphy.max_ap_assoc_sta &&
1804                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1805                                 rdev->wiphy.max_ap_assoc_sta))
1806                         goto nla_put_failure;
1807
1808                 state->split_start++;
1809                 break;
1810         case 11:
1811                 if (rdev->wiphy.n_vendor_commands) {
1812                         const struct nl80211_vendor_cmd_info *info;
1813                         struct nlattr *nested;
1814
1815                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1816                         if (!nested)
1817                                 goto nla_put_failure;
1818
1819                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1820                                 info = &rdev->wiphy.vendor_commands[i].info;
1821                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1822                                         goto nla_put_failure;
1823                         }
1824                         nla_nest_end(msg, nested);
1825                 }
1826
1827                 if (rdev->wiphy.n_vendor_events) {
1828                         const struct nl80211_vendor_cmd_info *info;
1829                         struct nlattr *nested;
1830
1831                         nested = nla_nest_start(msg,
1832                                                 NL80211_ATTR_VENDOR_EVENTS);
1833                         if (!nested)
1834                                 goto nla_put_failure;
1835
1836                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1837                                 info = &rdev->wiphy.vendor_events[i];
1838                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1839                                         goto nla_put_failure;
1840                         }
1841                         nla_nest_end(msg, nested);
1842                 }
1843                 state->split_start++;
1844                 break;
1845         case 12:
1846                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1847                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1848                                rdev->wiphy.max_num_csa_counters))
1849                         goto nla_put_failure;
1850
1851                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1852                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1853                         goto nla_put_failure;
1854
1855                 if (rdev->wiphy.max_sched_scan_reqs &&
1856                     nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_MAX_REQS,
1857                                 rdev->wiphy.max_sched_scan_reqs))
1858                         goto nla_put_failure;
1859
1860                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1861                             sizeof(rdev->wiphy.ext_features),
1862                             rdev->wiphy.ext_features))
1863                         goto nla_put_failure;
1864
1865                 if (rdev->wiphy.bss_select_support) {
1866                         struct nlattr *nested;
1867                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1868
1869                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1870                         if (!nested)
1871                                 goto nla_put_failure;
1872
1873                         i = 0;
1874                         while (bss_select_support) {
1875                                 if ((bss_select_support & 1) &&
1876                                     nla_put_flag(msg, i))
1877                                         goto nla_put_failure;
1878                                 i++;
1879                                 bss_select_support >>= 1;
1880                         }
1881                         nla_nest_end(msg, nested);
1882                 }
1883
1884                 state->split_start++;
1885                 break;
1886         case 13:
1887                 if (rdev->wiphy.num_iftype_ext_capab &&
1888                     rdev->wiphy.iftype_ext_capab) {
1889                         struct nlattr *nested_ext_capab, *nested;
1890
1891                         nested = nla_nest_start(msg,
1892                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1893                         if (!nested)
1894                                 goto nla_put_failure;
1895
1896                         for (i = state->capa_start;
1897                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1898                                 const struct wiphy_iftype_ext_capab *capab;
1899
1900                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1901
1902                                 nested_ext_capab = nla_nest_start(msg, i);
1903                                 if (!nested_ext_capab ||
1904                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1905                                                 capab->iftype) ||
1906                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1907                                             capab->extended_capabilities_len,
1908                                             capab->extended_capabilities) ||
1909                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1910                                             capab->extended_capabilities_len,
1911                                             capab->extended_capabilities_mask))
1912                                         goto nla_put_failure;
1913
1914                                 nla_nest_end(msg, nested_ext_capab);
1915                                 if (state->split)
1916                                         break;
1917                         }
1918                         nla_nest_end(msg, nested);
1919                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1920                                 state->capa_start = i + 1;
1921                                 break;
1922                         }
1923                 }
1924
1925                 if (nla_put_u32(msg, NL80211_ATTR_BANDS,
1926                                 rdev->wiphy.nan_supported_bands))
1927                         goto nla_put_failure;
1928
1929                 /* done */
1930                 state->split_start = 0;
1931                 break;
1932         }
1933  finish:
1934         genlmsg_end(msg, hdr);
1935         return 0;
1936
1937  nla_put_failure:
1938         genlmsg_cancel(msg, hdr);
1939         return -EMSGSIZE;
1940 }
1941
1942 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1943                                     struct netlink_callback *cb,
1944                                     struct nl80211_dump_wiphy_state *state)
1945 {
1946         struct nlattr **tb = genl_family_attrbuf(&nl80211_fam);
1947         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, tb,
1948                               nl80211_fam.maxattr, nl80211_policy, NULL);
1949         /* ignore parse errors for backward compatibility */
1950         if (ret)
1951                 return 0;
1952
1953         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1954         if (tb[NL80211_ATTR_WIPHY])
1955                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1956         if (tb[NL80211_ATTR_WDEV])
1957                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1958         if (tb[NL80211_ATTR_IFINDEX]) {
1959                 struct net_device *netdev;
1960                 struct cfg80211_registered_device *rdev;
1961                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1962
1963                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1964                 if (!netdev)
1965                         return -ENODEV;
1966                 if (netdev->ieee80211_ptr) {
1967                         rdev = wiphy_to_rdev(
1968                                 netdev->ieee80211_ptr->wiphy);
1969                         state->filter_wiphy = rdev->wiphy_idx;
1970                 }
1971         }
1972
1973         return 0;
1974 }
1975
1976 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1977 {
1978         int idx = 0, ret;
1979         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1980         struct cfg80211_registered_device *rdev;
1981
1982         rtnl_lock();
1983         if (!state) {
1984                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1985                 if (!state) {
1986                         rtnl_unlock();
1987                         return -ENOMEM;
1988                 }
1989                 state->filter_wiphy = -1;
1990                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1991                 if (ret) {
1992                         kfree(state);
1993                         rtnl_unlock();
1994                         return ret;
1995                 }
1996                 cb->args[0] = (long)state;
1997         }
1998
1999         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2000                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2001                         continue;
2002                 if (++idx <= state->start)
2003                         continue;
2004                 if (state->filter_wiphy != -1 &&
2005                     state->filter_wiphy != rdev->wiphy_idx)
2006                         continue;
2007                 /* attempt to fit multiple wiphy data chunks into the skb */
2008                 do {
2009                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
2010                                                  skb,
2011                                                  NETLINK_CB(cb->skb).portid,
2012                                                  cb->nlh->nlmsg_seq,
2013                                                  NLM_F_MULTI, state);
2014                         if (ret < 0) {
2015                                 /*
2016                                  * If sending the wiphy data didn't fit (ENOBUFS
2017                                  * or EMSGSIZE returned), this SKB is still
2018                                  * empty (so it's not too big because another
2019                                  * wiphy dataset is already in the skb) and
2020                                  * we've not tried to adjust the dump allocation
2021                                  * yet ... then adjust the alloc size to be
2022                                  * bigger, and return 1 but with the empty skb.
2023                                  * This results in an empty message being RX'ed
2024                                  * in userspace, but that is ignored.
2025                                  *
2026                                  * We can then retry with the larger buffer.
2027                                  */
2028                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
2029                                     !skb->len && !state->split &&
2030                                     cb->min_dump_alloc < 4096) {
2031                                         cb->min_dump_alloc = 4096;
2032                                         state->split_start = 0;
2033                                         rtnl_unlock();
2034                                         return 1;
2035                                 }
2036                                 idx--;
2037                                 break;
2038                         }
2039                 } while (state->split_start > 0);
2040                 break;
2041         }
2042         rtnl_unlock();
2043
2044         state->start = idx;
2045
2046         return skb->len;
2047 }
2048
2049 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
2050 {
2051         kfree((void *)cb->args[0]);
2052         return 0;
2053 }
2054
2055 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
2056 {
2057         struct sk_buff *msg;
2058         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2059         struct nl80211_dump_wiphy_state state = {};
2060
2061         msg = nlmsg_new(4096, GFP_KERNEL);
2062         if (!msg)
2063                 return -ENOMEM;
2064
2065         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
2066                                info->snd_portid, info->snd_seq, 0,
2067                                &state) < 0) {
2068                 nlmsg_free(msg);
2069                 return -ENOBUFS;
2070         }
2071
2072         return genlmsg_reply(msg, info);
2073 }
2074
2075 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
2076         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
2077         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
2078         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
2079         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
2080         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
2081 };
2082
2083 static int parse_txq_params(struct nlattr *tb[],
2084                             struct ieee80211_txq_params *txq_params)
2085 {
2086         u8 ac;
2087
2088         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
2089             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
2090             !tb[NL80211_TXQ_ATTR_AIFS])
2091                 return -EINVAL;
2092
2093         ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
2094         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
2095         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
2096         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
2097         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
2098
2099         if (ac >= NL80211_NUM_ACS)
2100                 return -EINVAL;
2101         txq_params->ac = array_index_nospec(ac, NL80211_NUM_ACS);
2102         return 0;
2103 }
2104
2105 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
2106 {
2107         /*
2108          * You can only set the channel explicitly for WDS interfaces,
2109          * all others have their channel managed via their respective
2110          * "establish a connection" command (connect, join, ...)
2111          *
2112          * For AP/GO and mesh mode, the channel can be set with the
2113          * channel userspace API, but is only stored and passed to the
2114          * low-level driver when the AP starts or the mesh is joined.
2115          * This is for backward compatibility, userspace can also give
2116          * the channel in the start-ap or join-mesh commands instead.
2117          *
2118          * Monitors are special as they are normally slaved to
2119          * whatever else is going on, so they have their own special
2120          * operation to set the monitor channel if possible.
2121          */
2122         return !wdev ||
2123                 wdev->iftype == NL80211_IFTYPE_AP ||
2124                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2125                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2126                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2127 }
2128
2129 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2130                                  struct genl_info *info,
2131                                  struct cfg80211_chan_def *chandef)
2132 {
2133         u32 control_freq;
2134
2135         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2136                 return -EINVAL;
2137
2138         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2139
2140         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2141         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2142         chandef->center_freq1 = control_freq;
2143         chandef->center_freq2 = 0;
2144
2145         /* Primary channel not allowed */
2146         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2147                 return -EINVAL;
2148
2149         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2150                 enum nl80211_channel_type chantype;
2151
2152                 chantype = nla_get_u32(
2153                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2154
2155                 switch (chantype) {
2156                 case NL80211_CHAN_NO_HT:
2157                 case NL80211_CHAN_HT20:
2158                 case NL80211_CHAN_HT40PLUS:
2159                 case NL80211_CHAN_HT40MINUS:
2160                         cfg80211_chandef_create(chandef, chandef->chan,
2161                                                 chantype);
2162                         /* user input for center_freq is incorrect */
2163                         if (info->attrs[NL80211_ATTR_CENTER_FREQ1] &&
2164                             chandef->center_freq1 != nla_get_u32(
2165                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]))
2166                                 return -EINVAL;
2167                         /* center_freq2 must be zero */
2168                         if (info->attrs[NL80211_ATTR_CENTER_FREQ2] &&
2169                             nla_get_u32(info->attrs[NL80211_ATTR_CENTER_FREQ2]))
2170                                 return -EINVAL;
2171                         break;
2172                 default:
2173                         return -EINVAL;
2174                 }
2175         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2176                 chandef->width =
2177                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2178                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2179                         chandef->center_freq1 =
2180                                 nla_get_u32(
2181                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2182                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2183                         chandef->center_freq2 =
2184                                 nla_get_u32(
2185                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2186         }
2187
2188         if (!cfg80211_chandef_valid(chandef))
2189                 return -EINVAL;
2190
2191         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2192                                      IEEE80211_CHAN_DISABLED))
2193                 return -EINVAL;
2194
2195         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2196              chandef->width == NL80211_CHAN_WIDTH_10) &&
2197             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2198                 return -EINVAL;
2199
2200         return 0;
2201 }
2202
2203 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2204                                  struct net_device *dev,
2205                                  struct genl_info *info)
2206 {
2207         struct cfg80211_chan_def chandef;
2208         int result;
2209         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2210         struct wireless_dev *wdev = NULL;
2211
2212         if (dev)
2213                 wdev = dev->ieee80211_ptr;
2214         if (!nl80211_can_set_dev_channel(wdev))
2215                 return -EOPNOTSUPP;
2216         if (wdev)
2217                 iftype = wdev->iftype;
2218
2219         result = nl80211_parse_chandef(rdev, info, &chandef);
2220         if (result)
2221                 return result;
2222
2223         switch (iftype) {
2224         case NL80211_IFTYPE_AP:
2225         case NL80211_IFTYPE_P2P_GO:
2226                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2227                                                    iftype)) {
2228                         result = -EINVAL;
2229                         break;
2230                 }
2231                 if (wdev->beacon_interval) {
2232                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2233                             !(rdev->wiphy.features &
2234                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2235                                 result = -EBUSY;
2236                                 break;
2237                         }
2238
2239                         /* Only allow dynamic channel width changes */
2240                         if (chandef.chan != wdev->preset_chandef.chan) {
2241                                 result = -EBUSY;
2242                                 break;
2243                         }
2244                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2245                         if (result)
2246                                 break;
2247                 }
2248                 wdev->preset_chandef = chandef;
2249                 result = 0;
2250                 break;
2251         case NL80211_IFTYPE_MESH_POINT:
2252                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2253                 break;
2254         case NL80211_IFTYPE_MONITOR:
2255                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2256                 break;
2257         default:
2258                 result = -EINVAL;
2259         }
2260
2261         return result;
2262 }
2263
2264 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2265 {
2266         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2267         struct net_device *netdev = info->user_ptr[1];
2268
2269         return __nl80211_set_channel(rdev, netdev, info);
2270 }
2271
2272 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2273 {
2274         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2275         struct net_device *dev = info->user_ptr[1];
2276         struct wireless_dev *wdev = dev->ieee80211_ptr;
2277         const u8 *bssid;
2278
2279         if (!info->attrs[NL80211_ATTR_MAC])
2280                 return -EINVAL;
2281
2282         if (netif_running(dev))
2283                 return -EBUSY;
2284
2285         if (!rdev->ops->set_wds_peer)
2286                 return -EOPNOTSUPP;
2287
2288         if (wdev->iftype != NL80211_IFTYPE_WDS)
2289                 return -EOPNOTSUPP;
2290
2291         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2292         return rdev_set_wds_peer(rdev, dev, bssid);
2293 }
2294
2295 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2296 {
2297         struct cfg80211_registered_device *rdev;
2298         struct net_device *netdev = NULL;
2299         struct wireless_dev *wdev;
2300         int result = 0, rem_txq_params = 0;
2301         struct nlattr *nl_txq_params;
2302         u32 changed;
2303         u8 retry_short = 0, retry_long = 0;
2304         u32 frag_threshold = 0, rts_threshold = 0;
2305         u8 coverage_class = 0;
2306
2307         ASSERT_RTNL();
2308
2309         /*
2310          * Try to find the wiphy and netdev. Normally this
2311          * function shouldn't need the netdev, but this is
2312          * done for backward compatibility -- previously
2313          * setting the channel was done per wiphy, but now
2314          * it is per netdev. Previous userland like hostapd
2315          * also passed a netdev to set_wiphy, so that it is
2316          * possible to let that go to the right netdev!
2317          */
2318
2319         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2320                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2321
2322                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2323                 if (netdev && netdev->ieee80211_ptr)
2324                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2325                 else
2326                         netdev = NULL;
2327         }
2328
2329         if (!netdev) {
2330                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2331                                                   info->attrs);
2332                 if (IS_ERR(rdev))
2333                         return PTR_ERR(rdev);
2334                 wdev = NULL;
2335                 netdev = NULL;
2336                 result = 0;
2337         } else
2338                 wdev = netdev->ieee80211_ptr;
2339
2340         /*
2341          * end workaround code, by now the rdev is available
2342          * and locked, and wdev may or may not be NULL.
2343          */
2344
2345         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2346                 result = cfg80211_dev_rename(
2347                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2348
2349         if (result)
2350                 return result;
2351
2352         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2353                 struct ieee80211_txq_params txq_params;
2354                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2355
2356                 if (!rdev->ops->set_txq_params)
2357                         return -EOPNOTSUPP;
2358
2359                 if (!netdev)
2360                         return -EINVAL;
2361
2362                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2363                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2364                         return -EINVAL;
2365
2366                 if (!netif_running(netdev))
2367                         return -ENETDOWN;
2368
2369                 nla_for_each_nested(nl_txq_params,
2370                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2371                                     rem_txq_params) {
2372                         result = nla_parse_nested(tb, NL80211_TXQ_ATTR_MAX,
2373                                                   nl_txq_params,
2374                                                   txq_params_policy,
2375                                                   info->extack);
2376                         if (result)
2377                                 return result;
2378                         result = parse_txq_params(tb, &txq_params);
2379                         if (result)
2380                                 return result;
2381
2382                         result = rdev_set_txq_params(rdev, netdev,
2383                                                      &txq_params);
2384                         if (result)
2385                                 return result;
2386                 }
2387         }
2388
2389         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2390                 result = __nl80211_set_channel(
2391                         rdev,
2392                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2393                         info);
2394                 if (result)
2395                         return result;
2396         }
2397
2398         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2399                 struct wireless_dev *txp_wdev = wdev;
2400                 enum nl80211_tx_power_setting type;
2401                 int idx, mbm = 0;
2402
2403                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2404                         txp_wdev = NULL;
2405
2406                 if (!rdev->ops->set_tx_power)
2407                         return -EOPNOTSUPP;
2408
2409                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2410                 type = nla_get_u32(info->attrs[idx]);
2411
2412                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2413                     (type != NL80211_TX_POWER_AUTOMATIC))
2414                         return -EINVAL;
2415
2416                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2417                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2418                         mbm = nla_get_u32(info->attrs[idx]);
2419                 }
2420
2421                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2422                 if (result)
2423                         return result;
2424         }
2425
2426         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2427             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2428                 u32 tx_ant, rx_ant;
2429
2430                 if ((!rdev->wiphy.available_antennas_tx &&
2431                      !rdev->wiphy.available_antennas_rx) ||
2432                     !rdev->ops->set_antenna)
2433                         return -EOPNOTSUPP;
2434
2435                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2436                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2437
2438                 /* reject antenna configurations which don't match the
2439                  * available antenna masks, except for the "all" mask */
2440                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2441                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2442                         return -EINVAL;
2443
2444                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2445                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2446
2447                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2448                 if (result)
2449                         return result;
2450         }
2451
2452         changed = 0;
2453
2454         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2455                 retry_short = nla_get_u8(
2456                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2457                 if (retry_short == 0)
2458                         return -EINVAL;
2459
2460                 changed |= WIPHY_PARAM_RETRY_SHORT;
2461         }
2462
2463         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2464                 retry_long = nla_get_u8(
2465                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2466                 if (retry_long == 0)
2467                         return -EINVAL;
2468
2469                 changed |= WIPHY_PARAM_RETRY_LONG;
2470         }
2471
2472         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2473                 frag_threshold = nla_get_u32(
2474                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2475                 if (frag_threshold < 256)
2476                         return -EINVAL;
2477
2478                 if (frag_threshold != (u32) -1) {
2479                         /*
2480                          * Fragments (apart from the last one) are required to
2481                          * have even length. Make the fragmentation code
2482                          * simpler by stripping LSB should someone try to use
2483                          * odd threshold value.
2484                          */
2485                         frag_threshold &= ~0x1;
2486                 }
2487                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2488         }
2489
2490         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2491                 rts_threshold = nla_get_u32(
2492                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2493                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2494         }
2495
2496         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2497                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2498                         return -EINVAL;
2499
2500                 coverage_class = nla_get_u8(
2501                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2502                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2503         }
2504
2505         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2506                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2507                         return -EOPNOTSUPP;
2508
2509                 changed |= WIPHY_PARAM_DYN_ACK;
2510         }
2511
2512         if (changed) {
2513                 u8 old_retry_short, old_retry_long;
2514                 u32 old_frag_threshold, old_rts_threshold;
2515                 u8 old_coverage_class;
2516
2517                 if (!rdev->ops->set_wiphy_params)
2518                         return -EOPNOTSUPP;
2519
2520                 old_retry_short = rdev->wiphy.retry_short;
2521                 old_retry_long = rdev->wiphy.retry_long;
2522                 old_frag_threshold = rdev->wiphy.frag_threshold;
2523                 old_rts_threshold = rdev->wiphy.rts_threshold;
2524                 old_coverage_class = rdev->wiphy.coverage_class;
2525
2526                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2527                         rdev->wiphy.retry_short = retry_short;
2528                 if (changed & WIPHY_PARAM_RETRY_LONG)
2529                         rdev->wiphy.retry_long = retry_long;
2530                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2531                         rdev->wiphy.frag_threshold = frag_threshold;
2532                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2533                         rdev->wiphy.rts_threshold = rts_threshold;
2534                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2535                         rdev->wiphy.coverage_class = coverage_class;
2536
2537                 result = rdev_set_wiphy_params(rdev, changed);
2538                 if (result) {
2539                         rdev->wiphy.retry_short = old_retry_short;
2540                         rdev->wiphy.retry_long = old_retry_long;
2541                         rdev->wiphy.frag_threshold = old_frag_threshold;
2542                         rdev->wiphy.rts_threshold = old_rts_threshold;
2543                         rdev->wiphy.coverage_class = old_coverage_class;
2544                         return result;
2545                 }
2546         }
2547         return 0;
2548 }
2549
2550 static inline u64 wdev_id(struct wireless_dev *wdev)
2551 {
2552         return (u64)wdev->identifier |
2553                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2554 }
2555
2556 static int nl80211_send_chandef(struct sk_buff *msg,
2557                                 const struct cfg80211_chan_def *chandef)
2558 {
2559         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2560                 return -EINVAL;
2561
2562         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2563                         chandef->chan->center_freq))
2564                 return -ENOBUFS;
2565         switch (chandef->width) {
2566         case NL80211_CHAN_WIDTH_20_NOHT:
2567         case NL80211_CHAN_WIDTH_20:
2568         case NL80211_CHAN_WIDTH_40:
2569                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2570                                 cfg80211_get_chandef_type(chandef)))
2571                         return -ENOBUFS;
2572                 break;
2573         default:
2574                 break;
2575         }
2576         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2577                 return -ENOBUFS;
2578         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2579                 return -ENOBUFS;
2580         if (chandef->center_freq2 &&
2581             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2582                 return -ENOBUFS;
2583         return 0;
2584 }
2585
2586 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2587                               struct cfg80211_registered_device *rdev,
2588                               struct wireless_dev *wdev, bool removal)
2589 {
2590         struct net_device *dev = wdev->netdev;
2591         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2592         void *hdr;
2593
2594         if (removal)
2595                 cmd = NL80211_CMD_DEL_INTERFACE;
2596
2597         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2598         if (!hdr)
2599                 return -1;
2600
2601         if (dev &&
2602             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2603              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2604                 goto nla_put_failure;
2605
2606         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2607             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2608             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2609                               NL80211_ATTR_PAD) ||
2610             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2611             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2612                         rdev->devlist_generation ^
2613                         (cfg80211_rdev_list_generation << 2)))
2614                 goto nla_put_failure;
2615
2616         if (rdev->ops->get_channel) {
2617                 int ret;
2618                 struct cfg80211_chan_def chandef;
2619
2620                 ret = rdev_get_channel(rdev, wdev, &chandef);
2621                 if (ret == 0) {
2622                         if (nl80211_send_chandef(msg, &chandef))
2623                                 goto nla_put_failure;
2624                 }
2625         }
2626
2627         if (rdev->ops->get_tx_power) {
2628                 int dbm, ret;
2629
2630                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2631                 if (ret == 0 &&
2632                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2633                                 DBM_TO_MBM(dbm)))
2634                         goto nla_put_failure;
2635         }
2636
2637         wdev_lock(wdev);
2638         switch (wdev->iftype) {
2639         case NL80211_IFTYPE_AP:
2640                 if (wdev->ssid_len &&
2641                     nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2642                         goto nla_put_failure_locked;
2643                 break;
2644         case NL80211_IFTYPE_STATION:
2645         case NL80211_IFTYPE_P2P_CLIENT:
2646         case NL80211_IFTYPE_ADHOC: {
2647                 const u8 *ssid_ie;
2648                 if (!wdev->current_bss)
2649                         break;
2650                 rcu_read_lock();
2651                 ssid_ie = ieee80211_bss_get_ie(&wdev->current_bss->pub,
2652                                                WLAN_EID_SSID);
2653                 if (ssid_ie &&
2654                     nla_put(msg, NL80211_ATTR_SSID, ssid_ie[1], ssid_ie + 2))
2655                         goto nla_put_failure_rcu_locked;
2656                 rcu_read_unlock();
2657                 break;
2658                 }
2659         default:
2660                 /* nothing */
2661                 break;
2662         }
2663         wdev_unlock(wdev);
2664
2665         genlmsg_end(msg, hdr);
2666         return 0;
2667
2668  nla_put_failure_rcu_locked:
2669         rcu_read_unlock();
2670  nla_put_failure_locked:
2671         wdev_unlock(wdev);
2672  nla_put_failure:
2673         genlmsg_cancel(msg, hdr);
2674         return -EMSGSIZE;
2675 }
2676
2677 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2678 {
2679         int wp_idx = 0;
2680         int if_idx = 0;
2681         int wp_start = cb->args[0];
2682         int if_start = cb->args[1];
2683         int filter_wiphy = -1;
2684         struct cfg80211_registered_device *rdev;
2685         struct wireless_dev *wdev;
2686         int ret;
2687
2688         rtnl_lock();
2689         if (!cb->args[2]) {
2690                 struct nl80211_dump_wiphy_state state = {
2691                         .filter_wiphy = -1,
2692                 };
2693
2694                 ret = nl80211_dump_wiphy_parse(skb, cb, &state);
2695                 if (ret)
2696                         goto out_unlock;
2697
2698                 filter_wiphy = state.filter_wiphy;
2699
2700                 /*
2701                  * if filtering, set cb->args[2] to +1 since 0 is the default
2702                  * value needed to determine that parsing is necessary.
2703                  */
2704                 if (filter_wiphy >= 0)
2705                         cb->args[2] = filter_wiphy + 1;
2706                 else
2707                         cb->args[2] = -1;
2708         } else if (cb->args[2] > 0) {
2709                 filter_wiphy = cb->args[2] - 1;
2710         }
2711
2712         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2713                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2714                         continue;
2715                 if (wp_idx < wp_start) {
2716                         wp_idx++;
2717                         continue;
2718                 }
2719
2720                 if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
2721                         continue;
2722
2723                 if_idx = 0;
2724
2725                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2726                         if (if_idx < if_start) {
2727                                 if_idx++;
2728                                 continue;
2729                         }
2730                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2731                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2732                                                rdev, wdev, false) < 0) {
2733                                 goto out;
2734                         }
2735                         if_idx++;
2736                 }
2737
2738                 wp_idx++;
2739         }
2740  out:
2741         cb->args[0] = wp_idx;
2742         cb->args[1] = if_idx;
2743
2744         ret = skb->len;
2745  out_unlock:
2746         rtnl_unlock();
2747
2748         return ret;
2749 }
2750
2751 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2752 {
2753         struct sk_buff *msg;
2754         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2755         struct wireless_dev *wdev = info->user_ptr[1];
2756
2757         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2758         if (!msg)
2759                 return -ENOMEM;
2760
2761         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2762                                rdev, wdev, false) < 0) {
2763                 nlmsg_free(msg);
2764                 return -ENOBUFS;
2765         }
2766
2767         return genlmsg_reply(msg, info);
2768 }
2769
2770 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2771         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2772         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2773         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2774         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2775         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2776         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2777 };
2778
2779 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2780 {
2781         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2782         int flag;
2783
2784         *mntrflags = 0;
2785
2786         if (!nla)
2787                 return -EINVAL;
2788
2789         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX, nla,
2790                              mntr_flags_policy, NULL))
2791                 return -EINVAL;
2792
2793         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2794                 if (flags[flag])
2795                         *mntrflags |= (1<<flag);
2796
2797         *mntrflags |= MONITOR_FLAG_CHANGED;
2798
2799         return 0;
2800 }
2801
2802 static int nl80211_parse_mon_options(struct cfg80211_registered_device *rdev,
2803                                      enum nl80211_iftype type,
2804                                      struct genl_info *info,
2805                                      struct vif_params *params)
2806 {
2807         bool change = false;
2808         int err;
2809
2810         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2811                 if (type != NL80211_IFTYPE_MONITOR)
2812                         return -EINVAL;
2813
2814                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2815                                           &params->flags);
2816                 if (err)
2817                         return err;
2818
2819                 change = true;
2820         }
2821
2822         if (params->flags & MONITOR_FLAG_ACTIVE &&
2823             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2824                 return -EOPNOTSUPP;
2825
2826         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2827                 const u8 *mumimo_groups;
2828                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2829
2830                 if (type != NL80211_IFTYPE_MONITOR)
2831                         return -EINVAL;
2832
2833                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2834                         return -EOPNOTSUPP;
2835
2836                 mumimo_groups =
2837                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2838
2839                 /* bits 0 and 63 are reserved and must be zero */
2840                 if ((mumimo_groups[0] & BIT(0)) ||
2841                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(7)))
2842                         return -EINVAL;
2843
2844                 params->vht_mumimo_groups = mumimo_groups;
2845                 change = true;
2846         }
2847
2848         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2849                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2850
2851                 if (type != NL80211_IFTYPE_MONITOR)
2852                         return -EINVAL;
2853
2854                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2855                         return -EOPNOTSUPP;
2856
2857                 params->vht_mumimo_follow_addr =
2858                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]);
2859                 change = true;
2860         }
2861
2862         return change ? 1 : 0;
2863 }
2864
2865 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2866                                struct net_device *netdev, u8 use_4addr,
2867                                enum nl80211_iftype iftype)
2868 {
2869         if (!use_4addr) {
2870                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2871                         return -EBUSY;
2872                 return 0;
2873         }
2874
2875         switch (iftype) {
2876         case NL80211_IFTYPE_AP_VLAN:
2877                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2878                         return 0;
2879                 break;
2880         case NL80211_IFTYPE_STATION:
2881                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2882                         return 0;
2883                 break;
2884         default:
2885                 break;
2886         }
2887
2888         return -EOPNOTSUPP;
2889 }
2890
2891 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2892 {
2893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2894         struct vif_params params;
2895         int err;
2896         enum nl80211_iftype otype, ntype;
2897         struct net_device *dev = info->user_ptr[1];
2898         bool change = false;
2899
2900         memset(&params, 0, sizeof(params));
2901
2902         otype = ntype = dev->ieee80211_ptr->iftype;
2903
2904         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2905                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2906                 if (otype != ntype)
2907                         change = true;
2908                 if (ntype > NL80211_IFTYPE_MAX)
2909                         return -EINVAL;
2910         }
2911
2912         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2913                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2914
2915                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2916                         return -EINVAL;
2917                 if (netif_running(dev))
2918                         return -EBUSY;
2919
2920                 wdev_lock(wdev);
2921                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2922                              IEEE80211_MAX_MESH_ID_LEN);
2923                 wdev->mesh_id_up_len =
2924                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2925                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2926                        wdev->mesh_id_up_len);
2927                 wdev_unlock(wdev);
2928         }
2929
2930         if (info->attrs[NL80211_ATTR_4ADDR]) {
2931                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2932                 change = true;
2933                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2934                 if (err)
2935                         return err;
2936         } else {
2937                 params.use_4addr = -1;
2938         }
2939
2940         err = nl80211_parse_mon_options(rdev, ntype, info, &params);
2941         if (err < 0)
2942                 return err;
2943         if (err > 0)
2944                 change = true;
2945
2946         if (change)
2947                 err = cfg80211_change_iface(rdev, dev, ntype, &params);
2948         else
2949                 err = 0;
2950
2951         if (!err && params.use_4addr != -1)
2952                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2953
2954         return err;
2955 }
2956
2957 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2958 {
2959         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2960         struct vif_params params;
2961         struct wireless_dev *wdev;
2962         struct sk_buff *msg;
2963         int err;
2964         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2965
2966         /* to avoid failing a new interface creation due to pending removal */
2967         cfg80211_destroy_ifaces(rdev);
2968
2969         memset(&params, 0, sizeof(params));
2970
2971         if (!info->attrs[NL80211_ATTR_IFNAME])
2972                 return -EINVAL;
2973
2974         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2975                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2976                 if (type > NL80211_IFTYPE_MAX)
2977                         return -EINVAL;
2978         }
2979
2980         if (!rdev->ops->add_virtual_intf ||
2981             !(rdev->wiphy.interface_modes & (1 << type)))
2982                 return -EOPNOTSUPP;
2983
2984         if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN ||
2985              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2986             info->attrs[NL80211_ATTR_MAC]) {
2987                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2988                            ETH_ALEN);
2989                 if (!is_valid_ether_addr(params.macaddr))
2990                         return -EADDRNOTAVAIL;
2991         }
2992
2993         if (info->attrs[NL80211_ATTR_4ADDR]) {
2994                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2995                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2996                 if (err)
2997                         return err;
2998         }
2999
3000         err = nl80211_parse_mon_options(rdev, type, info, &params);
3001         if (err < 0)
3002                 return err;
3003
3004         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3005         if (!msg)
3006                 return -ENOMEM;
3007
3008         wdev = rdev_add_virtual_intf(rdev,
3009                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
3010                                 NET_NAME_USER, type, &params);
3011         if (WARN_ON(!wdev)) {
3012                 nlmsg_free(msg);
3013                 return -EPROTO;
3014         } else if (IS_ERR(wdev)) {
3015                 nlmsg_free(msg);
3016                 return PTR_ERR(wdev);
3017         }
3018
3019         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
3020                 wdev->owner_nlportid = info->snd_portid;
3021
3022         switch (type) {
3023         case NL80211_IFTYPE_MESH_POINT:
3024                 if (!info->attrs[NL80211_ATTR_MESH_ID])
3025                         break;
3026                 wdev_lock(wdev);
3027                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
3028                              IEEE80211_MAX_MESH_ID_LEN);
3029                 wdev->mesh_id_up_len =
3030                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
3031                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
3032                        wdev->mesh_id_up_len);
3033                 wdev_unlock(wdev);
3034                 break;
3035         case NL80211_IFTYPE_NAN:
3036         case NL80211_IFTYPE_P2P_DEVICE:
3037                 /*
3038                  * P2P Device and NAN do not have a netdev, so don't go
3039                  * through the netdev notifier and must be added here
3040                  */
3041                 mutex_init(&wdev->mtx);
3042                 INIT_LIST_HEAD(&wdev->event_list);
3043                 spin_lock_init(&wdev->event_lock);
3044                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
3045                 spin_lock_init(&wdev->mgmt_registrations_lock);
3046
3047                 wdev->identifier = ++rdev->wdev_id;
3048                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
3049                 rdev->devlist_generation++;
3050                 break;
3051         default:
3052                 break;
3053         }
3054
3055         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
3056                                rdev, wdev, false) < 0) {
3057                 nlmsg_free(msg);
3058                 return -ENOBUFS;
3059         }
3060
3061         /*
3062          * For wdevs which have no associated netdev object (e.g. of type
3063          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
3064          * For all other types, the event will be generated from the
3065          * netdev notifier
3066          */
3067         if (!wdev->netdev)
3068                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
3069
3070         return genlmsg_reply(msg, info);
3071 }
3072
3073 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
3074 {
3075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3076         struct wireless_dev *wdev = info->user_ptr[1];
3077
3078         if (!rdev->ops->del_virtual_intf)
3079                 return -EOPNOTSUPP;
3080
3081         /*
3082          * If we remove a wireless device without a netdev then clear
3083          * user_ptr[1] so that nl80211_post_doit won't dereference it
3084          * to check if it needs to do dev_put(). Otherwise it crashes
3085          * since the wdev has been freed, unlike with a netdev where
3086          * we need the dev_put() for the netdev to really be freed.
3087          */
3088         if (!wdev->netdev)
3089                 info->user_ptr[1] = NULL;
3090
3091         return rdev_del_virtual_intf(rdev, wdev);
3092 }
3093
3094 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
3095 {
3096         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3097         struct net_device *dev = info->user_ptr[1];
3098         u16 noack_map;
3099
3100         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
3101                 return -EINVAL;
3102
3103         if (!rdev->ops->set_noack_map)
3104                 return -EOPNOTSUPP;
3105
3106         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
3107
3108         return rdev_set_noack_map(rdev, dev, noack_map);
3109 }
3110
3111 struct get_key_cookie {
3112         struct sk_buff *msg;
3113         int error;
3114         int idx;
3115 };
3116
3117 static void get_key_callback(void *c, struct key_params *params)
3118 {
3119         struct nlattr *key;
3120         struct get_key_cookie *cookie = c;
3121
3122         if ((params->key &&
3123              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
3124                      params->key_len, params->key)) ||
3125             (params->seq &&
3126              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
3127                      params->seq_len, params->seq)) ||
3128             (params->cipher &&
3129              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
3130                          params->cipher)))
3131                 goto nla_put_failure;
3132
3133         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
3134         if (!key)
3135                 goto nla_put_failure;
3136
3137         if ((params->key &&
3138              nla_put(cookie->msg, NL80211_KEY_DATA,
3139                      params->key_len, params->key)) ||
3140             (params->seq &&
3141              nla_put(cookie->msg, NL80211_KEY_SEQ,
3142                      params->seq_len, params->seq)) ||
3143             (params->cipher &&
3144              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
3145                          params->cipher)))
3146                 goto nla_put_failure;
3147
3148         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
3149                 goto nla_put_failure;
3150
3151         nla_nest_end(cookie->msg, key);
3152
3153         return;
3154  nla_put_failure:
3155         cookie->error = 1;
3156 }
3157
3158 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
3159 {
3160         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3161         int err;
3162         struct net_device *dev = info->user_ptr[1];
3163         u8 key_idx = 0;
3164         const u8 *mac_addr = NULL;
3165         bool pairwise;
3166         struct get_key_cookie cookie = {
3167                 .error = 0,
3168         };
3169         void *hdr;
3170         struct sk_buff *msg;
3171
3172         if (info->attrs[NL80211_ATTR_KEY_IDX])
3173                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
3174
3175         if (key_idx > 5)
3176                 return -EINVAL;
3177
3178         if (info->attrs[NL80211_ATTR_MAC])
3179                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3180
3181         pairwise = !!mac_addr;
3182         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3183                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3184
3185                 if (kt >= NUM_NL80211_KEYTYPES)
3186                         return -EINVAL;
3187                 if (kt != NL80211_KEYTYPE_GROUP &&
3188                     kt != NL80211_KEYTYPE_PAIRWISE)
3189                         return -EINVAL;
3190                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3191         }
3192
3193         if (!rdev->ops->get_key)
3194                 return -EOPNOTSUPP;
3195
3196         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3197                 return -ENOENT;
3198
3199         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3200         if (!msg)
3201                 return -ENOMEM;
3202
3203         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3204                              NL80211_CMD_NEW_KEY);
3205         if (!hdr)
3206                 goto nla_put_failure;
3207
3208         cookie.msg = msg;
3209         cookie.idx = key_idx;
3210
3211         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3212             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3213                 goto nla_put_failure;
3214         if (mac_addr &&
3215             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3216                 goto nla_put_failure;
3217
3218         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3219                            get_key_callback);
3220
3221         if (err)
3222                 goto free_msg;
3223
3224         if (cookie.error)
3225                 goto nla_put_failure;
3226
3227         genlmsg_end(msg, hdr);
3228         return genlmsg_reply(msg, info);
3229
3230  nla_put_failure:
3231         err = -ENOBUFS;
3232  free_msg:
3233         nlmsg_free(msg);
3234         return err;
3235 }
3236
3237 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3238 {
3239         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3240         struct key_parse key;
3241         int err;
3242         struct net_device *dev = info->user_ptr[1];
3243
3244         err = nl80211_parse_key(info, &key);
3245         if (err)
3246                 return err;
3247
3248         if (key.idx < 0)
3249                 return -EINVAL;
3250
3251         /* only support setting default key */
3252         if (!key.def && !key.defmgmt)
3253                 return -EINVAL;
3254
3255         wdev_lock(dev->ieee80211_ptr);
3256
3257         if (key.def) {
3258                 if (!rdev->ops->set_default_key) {
3259                         err = -EOPNOTSUPP;
3260                         goto out;
3261                 }
3262
3263                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3264                 if (err)
3265                         goto out;
3266
3267                 err = rdev_set_default_key(rdev, dev, key.idx,
3268                                                  key.def_uni, key.def_multi);
3269
3270                 if (err)
3271                         goto out;
3272
3273 #ifdef CONFIG_CFG80211_WEXT
3274                 dev->ieee80211_ptr->wext.default_key = key.idx;
3275 #endif
3276         } else {
3277                 if (key.def_uni || !key.def_multi) {
3278                         err = -EINVAL;
3279                         goto out;
3280                 }
3281
3282                 if (!rdev->ops->set_default_mgmt_key) {
3283                         err = -EOPNOTSUPP;
3284                         goto out;
3285                 }
3286
3287                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3288                 if (err)
3289                         goto out;
3290
3291                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3292                 if (err)
3293                         goto out;
3294
3295 #ifdef CONFIG_CFG80211_WEXT
3296                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3297 #endif
3298         }
3299
3300  out:
3301         wdev_unlock(dev->ieee80211_ptr);
3302
3303         return err;
3304 }
3305
3306 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3307 {
3308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3309         int err;
3310         struct net_device *dev = info->user_ptr[1];
3311         struct key_parse key;
3312         const u8 *mac_addr = NULL;
3313
3314         err = nl80211_parse_key(info, &key);
3315         if (err)
3316                 return err;
3317
3318         if (!key.p.key)
3319                 return -EINVAL;
3320
3321         if (info->attrs[NL80211_ATTR_MAC])
3322                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3323
3324         if (key.type == -1) {
3325                 if (mac_addr)
3326                         key.type = NL80211_KEYTYPE_PAIRWISE;
3327                 else
3328                         key.type = NL80211_KEYTYPE_GROUP;
3329         }
3330
3331         /* for now */
3332         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3333             key.type != NL80211_KEYTYPE_GROUP)
3334                 return -EINVAL;
3335
3336         if (!rdev->ops->add_key)
3337                 return -EOPNOTSUPP;
3338
3339         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3340                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3341                                            mac_addr))
3342                 return -EINVAL;
3343
3344         wdev_lock(dev->ieee80211_ptr);
3345         err = nl80211_key_allowed(dev->ieee80211_ptr);
3346         if (!err)
3347                 err = rdev_add_key(rdev, dev, key.idx,
3348                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3349                                     mac_addr, &key.p);
3350         wdev_unlock(dev->ieee80211_ptr);
3351
3352         return err;
3353 }
3354
3355 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3356 {
3357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3358         int err;
3359         struct net_device *dev = info->user_ptr[1];
3360         u8 *mac_addr = NULL;
3361         struct key_parse key;
3362
3363         err = nl80211_parse_key(info, &key);
3364         if (err)
3365                 return err;
3366
3367         if (info->attrs[NL80211_ATTR_MAC])
3368                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3369
3370         if (key.type == -1) {
3371                 if (mac_addr)
3372                         key.type = NL80211_KEYTYPE_PAIRWISE;
3373                 else
3374                         key.type = NL80211_KEYTYPE_GROUP;
3375         }
3376
3377         /* for now */
3378         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3379             key.type != NL80211_KEYTYPE_GROUP)
3380                 return -EINVAL;
3381
3382         if (!rdev->ops->del_key)
3383                 return -EOPNOTSUPP;
3384
3385         wdev_lock(dev->ieee80211_ptr);
3386         err = nl80211_key_allowed(dev->ieee80211_ptr);
3387
3388         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3389             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3390                 err = -ENOENT;
3391
3392         if (!err)
3393                 err = rdev_del_key(rdev, dev, key.idx,
3394                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3395                                    mac_addr);
3396
3397 #ifdef CONFIG_CFG80211_WEXT
3398         if (!err) {
3399                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3400                         dev->ieee80211_ptr->wext.default_key = -1;
3401                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3402                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3403         }
3404 #endif
3405         wdev_unlock(dev->ieee80211_ptr);
3406
3407         return err;
3408 }
3409
3410 /* This function returns an error or the number of nested attributes */
3411 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3412 {
3413         struct nlattr *attr;
3414         int n_entries = 0, tmp;
3415
3416         nla_for_each_nested(attr, nl_attr, tmp) {
3417                 if (nla_len(attr) != ETH_ALEN)
3418                         return -EINVAL;
3419
3420                 n_entries++;
3421         }
3422
3423         return n_entries;
3424 }
3425
3426 /*
3427  * This function parses ACL information and allocates memory for ACL data.
3428  * On successful return, the calling function is responsible to free the
3429  * ACL buffer returned by this function.
3430  */
3431 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3432                                                 struct genl_info *info)
3433 {
3434         enum nl80211_acl_policy acl_policy;
3435         struct nlattr *attr;
3436         struct cfg80211_acl_data *acl;
3437         int i = 0, n_entries, tmp;
3438
3439         if (!wiphy->max_acl_mac_addrs)
3440                 return ERR_PTR(-EOPNOTSUPP);
3441
3442         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3443                 return ERR_PTR(-EINVAL);
3444
3445         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3446         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3447             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3448                 return ERR_PTR(-EINVAL);
3449
3450         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3451                 return ERR_PTR(-EINVAL);
3452
3453         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3454         if (n_entries < 0)
3455                 return ERR_PTR(n_entries);
3456
3457         if (n_entries > wiphy->max_acl_mac_addrs)
3458                 return ERR_PTR(-ENOTSUPP);
3459
3460         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3461                       GFP_KERNEL);
3462         if (!acl)
3463                 return ERR_PTR(-ENOMEM);
3464
3465         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3466                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3467                 i++;
3468         }
3469
3470         acl->n_acl_entries = n_entries;
3471         acl->acl_policy = acl_policy;
3472
3473         return acl;
3474 }
3475
3476 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3477 {
3478         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3479         struct net_device *dev = info->user_ptr[1];
3480         struct cfg80211_acl_data *acl;
3481         int err;
3482
3483         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3484             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3485                 return -EOPNOTSUPP;
3486
3487         if (!dev->ieee80211_ptr->beacon_interval)
3488                 return -EINVAL;
3489
3490         acl = parse_acl_data(&rdev->wiphy, info);
3491         if (IS_ERR(acl))
3492                 return PTR_ERR(acl);
3493
3494         err = rdev_set_mac_acl(rdev, dev, acl);
3495
3496         kfree(acl);
3497
3498         return err;
3499 }
3500
3501 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
3502                            u8 *rates, u8 rates_len)
3503 {
3504         u8 i;
3505         u32 mask = 0;
3506
3507         for (i = 0; i < rates_len; i++) {
3508                 int rate = (rates[i] & 0x7f) * 5;
3509                 int ridx;
3510
3511                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
3512                         struct ieee80211_rate *srate =
3513                                 &sband->bitrates[ridx];
3514                         if (rate == srate->bitrate) {
3515                                 mask |= 1 << ridx;
3516                                 break;
3517                         }
3518                 }
3519                 if (ridx == sband->n_bitrates)
3520                         return 0; /* rate not found */
3521         }
3522
3523         return mask;
3524 }
3525
3526 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
3527                                u8 *rates, u8 rates_len,
3528                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
3529 {
3530         u8 i;
3531
3532         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
3533
3534         for (i = 0; i < rates_len; i++) {
3535                 int ridx, rbit;
3536
3537                 ridx = rates[i] / 8;
3538                 rbit = BIT(rates[i] % 8);
3539
3540                 /* check validity */
3541                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
3542                         return false;
3543
3544                 /* check availability */
3545                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
3546                         mcs[ridx] |= rbit;
3547                 else
3548                         return false;
3549         }
3550
3551         return true;
3552 }
3553
3554 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
3555 {
3556         u16 mcs_mask = 0;
3557
3558         switch (vht_mcs_map) {
3559         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
3560                 break;
3561         case IEEE80211_VHT_MCS_SUPPORT_0_7:
3562                 mcs_mask = 0x00FF;
3563                 break;
3564         case IEEE80211_VHT_MCS_SUPPORT_0_8:
3565                 mcs_mask = 0x01FF;
3566                 break;
3567         case IEEE80211_VHT_MCS_SUPPORT_0_9:
3568                 mcs_mask = 0x03FF;
3569                 break;
3570         default:
3571                 break;
3572         }
3573
3574         return mcs_mask;
3575 }
3576
3577 static void vht_build_mcs_mask(u16 vht_mcs_map,
3578                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
3579 {
3580         u8 nss;
3581
3582         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
3583                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
3584                 vht_mcs_map >>= 2;
3585         }
3586 }
3587
3588 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
3589                              struct nl80211_txrate_vht *txrate,
3590                              u16 mcs[NL80211_VHT_NSS_MAX])
3591 {
3592         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3593         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
3594         u8 i;
3595
3596         if (!sband->vht_cap.vht_supported)
3597                 return false;
3598
3599         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
3600
3601         /* Build vht_mcs_mask from VHT capabilities */
3602         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
3603
3604         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3605                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
3606                         mcs[i] = txrate->mcs[i];
3607                 else
3608                         return false;
3609         }
3610
3611         return true;
3612 }
3613
3614 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
3615         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
3616                                     .len = NL80211_MAX_SUPP_RATES },
3617         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
3618                                 .len = NL80211_MAX_SUPP_HT_RATES },
3619         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
3620         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
3621 };
3622
3623 static int nl80211_parse_tx_bitrate_mask(struct genl_info *info,
3624                                          struct cfg80211_bitrate_mask *mask)
3625 {
3626         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
3627         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3628         int rem, i;
3629         struct nlattr *tx_rates;
3630         struct ieee80211_supported_band *sband;
3631         u16 vht_tx_mcs_map;
3632
3633         memset(mask, 0, sizeof(*mask));
3634         /* Default to all rates enabled */
3635         for (i = 0; i < NUM_NL80211_BANDS; i++) {
3636                 sband = rdev->wiphy.bands[i];
3637
3638                 if (!sband)
3639                         continue;
3640
3641                 mask->control[i].legacy = (1 << sband->n_bitrates) - 1;
3642                 memcpy(mask->control[i].ht_mcs,
3643                        sband->ht_cap.mcs.rx_mask,
3644                        sizeof(mask->control[i].ht_mcs));
3645
3646                 if (!sband->vht_cap.vht_supported)
3647                         continue;
3648
3649                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3650                 vht_build_mcs_mask(vht_tx_mcs_map, mask->control[i].vht_mcs);
3651         }
3652
3653         /* if no rates are given set it back to the defaults */
3654         if (!info->attrs[NL80211_ATTR_TX_RATES])
3655                 goto out;
3656
3657         /* The nested attribute uses enum nl80211_band as the index. This maps
3658          * directly to the enum nl80211_band values used in cfg80211.
3659          */
3660         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
3661         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
3662                 enum nl80211_band band = nla_type(tx_rates);
3663                 int err;
3664
3665                 if (band < 0 || band >= NUM_NL80211_BANDS)
3666                         return -EINVAL;
3667                 sband = rdev->wiphy.bands[band];
3668                 if (sband == NULL)
3669                         return -EINVAL;
3670                 err = nla_parse_nested(tb, NL80211_TXRATE_MAX, tx_rates,
3671                                        nl80211_txattr_policy, info->extack);
3672                 if (err)
3673                         return err;
3674                 if (tb[NL80211_TXRATE_LEGACY]) {
3675                         mask->control[band].legacy = rateset_to_mask(
3676                                 sband,
3677                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
3678                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
3679                         if ((mask->control[band].legacy == 0) &&
3680                             nla_len(tb[NL80211_TXRATE_LEGACY]))
3681                                 return -EINVAL;
3682                 }
3683                 if (tb[NL80211_TXRATE_HT]) {
3684                         if (!ht_rateset_to_mask(
3685                                         sband,
3686                                         nla_data(tb[NL80211_TXRATE_HT]),
3687                                         nla_len(tb[NL80211_TXRATE_HT]),
3688                                         mask->control[band].ht_mcs))
3689                                 return -EINVAL;
3690                 }
3691                 if (tb[NL80211_TXRATE_VHT]) {
3692                         if (!vht_set_mcs_mask(
3693                                         sband,
3694                                         nla_data(tb[NL80211_TXRATE_VHT]),
3695                                         mask->control[band].vht_mcs))
3696                                 return -EINVAL;
3697                 }
3698                 if (tb[NL80211_TXRATE_GI]) {
3699                         mask->control[band].gi =
3700                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
3701                         if (mask->control[band].gi > NL80211_TXRATE_FORCE_LGI)
3702                                 return -EINVAL;
3703                 }
3704
3705                 if (mask->control[band].legacy == 0) {
3706                         /* don't allow empty legacy rates if HT or VHT
3707                          * are not even supported.
3708                          */
3709                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
3710                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
3711                                 return -EINVAL;
3712
3713                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
3714                                 if (mask->control[band].ht_mcs[i])
3715                                         goto out;
3716
3717                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
3718                                 if (mask->control[band].vht_mcs[i])
3719                                         goto out;
3720
3721                         /* legacy and mcs rates may not be both empty */
3722                         return -EINVAL;
3723                 }
3724         }
3725
3726 out:
3727         return 0;
3728 }
3729
3730 static int validate_beacon_tx_rate(struct cfg80211_registered_device *rdev,
3731                                    enum nl80211_band band,
3732                                    struct cfg80211_bitrate_mask *beacon_rate)
3733 {
3734         u32 count_ht, count_vht, i;
3735         u32 rate = beacon_rate->control[band].legacy;
3736
3737         /* Allow only one rate */
3738         if (hweight32(rate) > 1)
3739                 return -EINVAL;
3740
3741         count_ht = 0;
3742         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
3743                 if (hweight8(beacon_rate->control[band].ht_mcs[i]) > 1) {
3744                         return -EINVAL;
3745                 } else if (beacon_rate->control[band].ht_mcs[i]) {
3746                         count_ht++;
3747                         if (count_ht > 1)
3748                                 return -EINVAL;
3749                 }
3750                 if (count_ht && rate)
3751                         return -EINVAL;
3752         }
3753
3754         count_vht = 0;
3755         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3756                 if (hweight16(beacon_rate->control[band].vht_mcs[i]) > 1) {
3757                         return -EINVAL;
3758                 } else if (beacon_rate->control[band].vht_mcs[i]) {
3759                         count_vht++;
3760                         if (count_vht > 1)
3761                                 return -EINVAL;
3762                 }
3763                 if (count_vht && rate)
3764                         return -EINVAL;
3765         }
3766
3767         if ((count_ht && count_vht) || (!rate && !count_ht && !count_vht))
3768                 return -EINVAL;
3769
3770         if (rate &&
3771             !wiphy_ext_feature_isset(&rdev->wiphy,
3772                                      NL80211_EXT_FEATURE_BEACON_RATE_LEGACY))
3773                 return -EINVAL;
3774         if (count_ht &&
3775             !wiphy_ext_feature_isset(&rdev->wiphy,
3776                                      NL80211_EXT_FEATURE_BEACON_RATE_HT))
3777                 return -EINVAL;
3778         if (count_vht &&
3779             !wiphy_ext_feature_isset(&rdev->wiphy,
3780                                      NL80211_EXT_FEATURE_BEACON_RATE_VHT))
3781                 return -EINVAL;
3782
3783         return 0;
3784 }
3785
3786 static int nl80211_parse_beacon(struct nlattr *attrs[],
3787                                 struct cfg80211_beacon_data *bcn)
3788 {
3789         bool haveinfo = false;
3790
3791         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3792             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3793             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3794             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3795                 return -EINVAL;
3796
3797         memset(bcn, 0, sizeof(*bcn));
3798
3799         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3800                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3801                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3802                 if (!bcn->head_len)
3803                         return -EINVAL;
3804                 haveinfo = true;
3805         }
3806
3807         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3808                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3809                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3810                 haveinfo = true;
3811         }
3812
3813         if (!haveinfo)
3814                 return -EINVAL;
3815
3816         if (attrs[NL80211_ATTR_IE]) {
3817                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3818                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3819         }
3820
3821         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3822                 bcn->proberesp_ies =
3823                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3824                 bcn->proberesp_ies_len =
3825                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3826         }
3827
3828         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3829                 bcn->assocresp_ies =
3830                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3831                 bcn->assocresp_ies_len =
3832                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3833         }
3834
3835         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3836                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3837                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3838         }
3839
3840         return 0;
3841 }
3842
3843 static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params,
3844                                             const u8 *rates)
3845 {
3846         int i;
3847
3848         if (!rates)
3849                 return;
3850
3851         for (i = 0; i < rates[1]; i++) {
3852                 if (rates[2 + i] == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
3853                         params->ht_required = true;
3854                 if (rates[2 + i] == BSS_MEMBERSHIP_SELECTOR_VHT_PHY)
3855                         params->vht_required = true;
3856         }
3857 }
3858
3859 /*
3860  * Since the nl80211 API didn't include, from the beginning, attributes about
3861  * HT/VHT requirements/capabilities, we parse them out of the IEs for the
3862  * benefit of drivers that rebuild IEs in the firmware.
3863  */
3864 static void nl80211_calculate_ap_params(struct cfg80211_ap_settings *params)
3865 {
3866         const struct cfg80211_beacon_data *bcn = &params->beacon;
3867         size_t ies_len = bcn->tail_len;
3868         const u8 *ies = bcn->tail;
3869         const u8 *rates;
3870         const u8 *cap;
3871
3872         rates = cfg80211_find_ie(WLAN_EID_SUPP_RATES, ies, ies_len);
3873         nl80211_check_ap_rate_selectors(params, rates);
3874
3875         rates = cfg80211_find_ie(WLAN_EID_EXT_SUPP_RATES, ies, ies_len);
3876         nl80211_check_ap_rate_selectors(params, rates);
3877
3878         cap = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
3879         if (cap && cap[1] >= sizeof(*params->ht_cap))
3880                 params->ht_cap = (void *)(cap + 2);
3881         cap = cfg80211_find_ie(WLAN_EID_VHT_CAPABILITY, ies, ies_len);
3882         if (cap && cap[1] >= sizeof(*params->vht_cap))
3883                 params->vht_cap = (void *)(cap + 2);
3884 }
3885
3886 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3887                                    struct cfg80211_ap_settings *params)
3888 {
3889         struct wireless_dev *wdev;
3890         bool ret = false;
3891
3892         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3893                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3894                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3895                         continue;
3896
3897                 if (!wdev->preset_chandef.chan)
3898                         continue;
3899
3900                 params->chandef = wdev->preset_chandef;
3901                 ret = true;
3902                 break;
3903         }
3904
3905         return ret;
3906 }
3907
3908 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3909                                     enum nl80211_auth_type auth_type,
3910                                     enum nl80211_commands cmd)
3911 {
3912         if (auth_type > NL80211_AUTHTYPE_MAX)
3913                 return false;
3914
3915         switch (cmd) {
3916         case NL80211_CMD_AUTHENTICATE:
3917                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3918                     auth_type == NL80211_AUTHTYPE_SAE)
3919                         return false;
3920                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
3921                                              NL80211_EXT_FEATURE_FILS_STA) &&
3922                     (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3923                      auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3924                      auth_type == NL80211_AUTHTYPE_FILS_PK))
3925                         return false;
3926                 return true;
3927         case NL80211_CMD_CONNECT:
3928                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3929                     auth_type == NL80211_AUTHTYPE_SAE)
3930                         return false;
3931
3932                 /* FILS with SK PFS or PK not supported yet */
3933                 if (auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3934                     auth_type == NL80211_AUTHTYPE_FILS_PK)
3935                         return false;
3936                 if (!wiphy_ext_feature_isset(
3937                             &rdev->wiphy,
3938                             NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
3939                     auth_type == NL80211_AUTHTYPE_FILS_SK)
3940                         return false;
3941                 return true;
3942         case NL80211_CMD_START_AP:
3943                 /* SAE not supported yet */
3944                 if (auth_type == NL80211_AUTHTYPE_SAE)
3945                         return false;
3946                 /* FILS not supported yet */
3947                 if (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3948                     auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3949                     auth_type == NL80211_AUTHTYPE_FILS_PK)
3950                         return false;
3951                 return true;
3952         default:
3953                 return false;
3954         }
3955 }
3956
3957 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3958 {
3959         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3960         struct net_device *dev = info->user_ptr[1];
3961         struct wireless_dev *wdev = dev->ieee80211_ptr;
3962         struct cfg80211_ap_settings params;
3963         int err;
3964
3965         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3966             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3967                 return -EOPNOTSUPP;
3968
3969         if (!rdev->ops->start_ap)
3970                 return -EOPNOTSUPP;
3971
3972         if (wdev->beacon_interval)
3973                 return -EALREADY;
3974
3975         memset(&params, 0, sizeof(params));
3976
3977         /* these are required for START_AP */
3978         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3979             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3980             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3981                 return -EINVAL;
3982
3983         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3984         if (err)
3985                 return err;
3986
3987         params.beacon_interval =
3988                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3989         params.dtim_period =
3990                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3991
3992         err = cfg80211_validate_beacon_int(rdev, dev->ieee80211_ptr->iftype,
3993                                            params.beacon_interval);
3994         if (err)
3995                 return err;
3996
3997         /*
3998          * In theory, some of these attributes should be required here
3999          * but since they were not used when the command was originally
4000          * added, keep them optional for old user space programs to let
4001          * them continue to work with drivers that do not need the
4002          * additional information -- drivers must check!
4003          */
4004         if (info->attrs[NL80211_ATTR_SSID]) {
4005                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4006                 params.ssid_len =
4007                         nla_len(info->attrs[NL80211_ATTR_SSID]);
4008                 if (params.ssid_len == 0 ||
4009                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
4010                         return -EINVAL;
4011         }
4012
4013         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
4014                 params.hidden_ssid = nla_get_u32(
4015                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
4016                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
4017                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
4018                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
4019                         return -EINVAL;
4020         }
4021
4022         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4023
4024         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4025                 params.auth_type = nla_get_u32(
4026                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
4027                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
4028                                              NL80211_CMD_START_AP))
4029                         return -EINVAL;
4030         } else
4031                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4032
4033         err = nl80211_crypto_settings(rdev, info, &params.crypto,
4034                                       NL80211_MAX_NR_CIPHER_SUITES);
4035         if (err)
4036                 return err;
4037
4038         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
4039                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
4040                         return -EOPNOTSUPP;
4041                 params.inactivity_timeout = nla_get_u16(
4042                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
4043         }
4044
4045         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4046                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4047                         return -EINVAL;
4048                 params.p2p_ctwindow =
4049                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4050                 if (params.p2p_ctwindow > 127)
4051                         return -EINVAL;
4052                 if (params.p2p_ctwindow != 0 &&
4053                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4054                         return -EINVAL;
4055         }
4056
4057         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4058                 u8 tmp;
4059
4060                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4061                         return -EINVAL;
4062                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4063                 if (tmp > 1)
4064                         return -EINVAL;
4065                 params.p2p_opp_ps = tmp;
4066                 if (params.p2p_opp_ps != 0 &&
4067                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4068                         return -EINVAL;
4069         }
4070
4071         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4072                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
4073                 if (err)
4074                         return err;
4075         } else if (wdev->preset_chandef.chan) {
4076                 params.chandef = wdev->preset_chandef;
4077         } else if (!nl80211_get_ap_channel(rdev, &params))
4078                 return -EINVAL;
4079
4080         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
4081                                            wdev->iftype))
4082                 return -EINVAL;
4083
4084         if (info->attrs[NL80211_ATTR_TX_RATES]) {
4085                 err = nl80211_parse_tx_bitrate_mask(info, &params.beacon_rate);
4086                 if (err)
4087                         return err;
4088
4089                 err = validate_beacon_tx_rate(rdev, params.chandef.chan->band,
4090                                               &params.beacon_rate);
4091                 if (err)
4092                         return err;
4093         }
4094
4095         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
4096                 params.smps_mode =
4097                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
4098                 switch (params.smps_mode) {
4099                 case NL80211_SMPS_OFF:
4100                         break;
4101                 case NL80211_SMPS_STATIC:
4102                         if (!(rdev->wiphy.features &
4103                               NL80211_FEATURE_STATIC_SMPS))
4104                                 return -EINVAL;
4105                         break;
4106                 case NL80211_SMPS_DYNAMIC:
4107                         if (!(rdev->wiphy.features &
4108                               NL80211_FEATURE_DYNAMIC_SMPS))
4109                                 return -EINVAL;
4110                         break;
4111                 default:
4112                         return -EINVAL;
4113                 }
4114         } else {
4115                 params.smps_mode = NL80211_SMPS_OFF;
4116         }
4117
4118         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
4119         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
4120                 return -EOPNOTSUPP;
4121
4122         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
4123                 params.acl = parse_acl_data(&rdev->wiphy, info);
4124                 if (IS_ERR(params.acl))
4125                         return PTR_ERR(params.acl);
4126         }
4127
4128         nl80211_calculate_ap_params(&params);
4129
4130         wdev_lock(wdev);
4131         err = rdev_start_ap(rdev, dev, &params);
4132         if (!err) {
4133                 wdev->preset_chandef = params.chandef;
4134                 wdev->beacon_interval = params.beacon_interval;
4135                 wdev->chandef = params.chandef;
4136                 wdev->ssid_len = params.ssid_len;
4137                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
4138
4139                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
4140                         wdev->conn_owner_nlportid = info->snd_portid;
4141         }
4142         wdev_unlock(wdev);
4143
4144         kfree(params.acl);
4145
4146         return err;
4147 }
4148
4149 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
4150 {
4151         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4152         struct net_device *dev = info->user_ptr[1];
4153         struct wireless_dev *wdev = dev->ieee80211_ptr;
4154         struct cfg80211_beacon_data params;
4155         int err;
4156
4157         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4158             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4159                 return -EOPNOTSUPP;
4160
4161         if (!rdev->ops->change_beacon)
4162                 return -EOPNOTSUPP;
4163
4164         if (!wdev->beacon_interval)
4165                 return -EINVAL;
4166
4167         err = nl80211_parse_beacon(info->attrs, &params);
4168         if (err)
4169                 return err;
4170
4171         wdev_lock(wdev);
4172         err = rdev_change_beacon(rdev, dev, &params);
4173         wdev_unlock(wdev);
4174
4175         return err;
4176 }
4177
4178 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
4179 {
4180         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4181         struct net_device *dev = info->user_ptr[1];
4182
4183         return cfg80211_stop_ap(rdev, dev, false);
4184 }
4185
4186 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
4187         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
4188         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
4189         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
4190         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
4191         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
4192         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
4193 };
4194
4195 static int parse_station_flags(struct genl_info *info,
4196                                enum nl80211_iftype iftype,
4197                                struct station_parameters *params)
4198 {
4199         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
4200         struct nlattr *nla;
4201         int flag;
4202
4203         /*
4204          * Try parsing the new attribute first so userspace
4205          * can specify both for older kernels.
4206          */
4207         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
4208         if (nla) {
4209                 struct nl80211_sta_flag_update *sta_flags;
4210
4211                 sta_flags = nla_data(nla);
4212                 params->sta_flags_mask = sta_flags->mask;
4213                 params->sta_flags_set = sta_flags->set;
4214                 params->sta_flags_set &= params->sta_flags_mask;
4215                 if ((params->sta_flags_mask |
4216                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
4217                         return -EINVAL;
4218                 return 0;
4219         }
4220
4221         /* if present, parse the old attribute */
4222
4223         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
4224         if (!nla)
4225                 return 0;
4226
4227         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX, nla,
4228                              sta_flags_policy, info->extack))
4229                 return -EINVAL;
4230
4231         /*
4232          * Only allow certain flags for interface types so that
4233          * other attributes are silently ignored. Remember that
4234          * this is backward compatibility code with old userspace
4235          * and shouldn't be hit in other cases anyway.
4236          */
4237         switch (iftype) {
4238         case NL80211_IFTYPE_AP:
4239         case NL80211_IFTYPE_AP_VLAN:
4240         case NL80211_IFTYPE_P2P_GO:
4241                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4242                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4243                                          BIT(NL80211_STA_FLAG_WME) |
4244                                          BIT(NL80211_STA_FLAG_MFP);
4245                 break;
4246         case NL80211_IFTYPE_P2P_CLIENT:
4247         case NL80211_IFTYPE_STATION:
4248                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4249                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
4250                 break;
4251         case NL80211_IFTYPE_MESH_POINT:
4252                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4253                                          BIT(NL80211_STA_FLAG_MFP) |
4254                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
4255         default:
4256                 return -EINVAL;
4257         }
4258
4259         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
4260                 if (flags[flag]) {
4261                         params->sta_flags_set |= (1<<flag);
4262
4263                         /* no longer support new API additions in old API */
4264                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
4265                                 return -EINVAL;
4266                 }
4267         }
4268
4269         return 0;
4270 }
4271
4272 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
4273                                  int attr)
4274 {
4275         struct nlattr *rate;
4276         u32 bitrate;
4277         u16 bitrate_compat;
4278         enum nl80211_rate_info rate_flg;
4279
4280         rate = nla_nest_start(msg, attr);
4281         if (!rate)
4282                 return false;
4283
4284         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
4285         bitrate = cfg80211_calculate_bitrate(info);
4286         /* report 16-bit bitrate only if we can */
4287         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
4288         if (bitrate > 0 &&
4289             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
4290                 return false;
4291         if (bitrate_compat > 0 &&
4292             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
4293                 return false;
4294
4295         switch (info->bw) {
4296         case RATE_INFO_BW_5:
4297                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
4298                 break;
4299         case RATE_INFO_BW_10:
4300                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
4301                 break;
4302         default:
4303                 WARN_ON(1);
4304                 /* fall through */
4305         case RATE_INFO_BW_20:
4306                 rate_flg = 0;
4307                 break;
4308         case RATE_INFO_BW_40:
4309                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
4310                 break;
4311         case RATE_INFO_BW_80:
4312                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
4313                 break;
4314         case RATE_INFO_BW_160:
4315                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
4316                 break;
4317         }
4318
4319         if (rate_flg && nla_put_flag(msg, rate_flg))
4320                 return false;
4321
4322         if (info->flags & RATE_INFO_FLAGS_MCS) {
4323                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
4324                         return false;
4325                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4326                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4327                         return false;
4328         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
4329                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
4330                         return false;
4331                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
4332                         return false;
4333                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4334                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4335                         return false;
4336         }
4337
4338         nla_nest_end(msg, rate);
4339         return true;
4340 }
4341
4342 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
4343                                int id)
4344 {
4345         void *attr;
4346         int i = 0;
4347
4348         if (!mask)
4349                 return true;
4350
4351         attr = nla_nest_start(msg, id);
4352         if (!attr)
4353                 return false;
4354
4355         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
4356                 if (!(mask & BIT(i)))
4357                         continue;
4358
4359                 if (nla_put_u8(msg, i, signal[i]))
4360                         return false;
4361         }
4362
4363         nla_nest_end(msg, attr);
4364
4365         return true;
4366 }
4367
4368 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
4369                                 u32 seq, int flags,
4370                                 struct cfg80211_registered_device *rdev,
4371                                 struct net_device *dev,
4372                                 const u8 *mac_addr, struct station_info *sinfo)
4373 {
4374         void *hdr;
4375         struct nlattr *sinfoattr, *bss_param;
4376
4377         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
4378         if (!hdr)
4379                 return -1;
4380
4381         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4382             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
4383             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
4384                 goto nla_put_failure;
4385
4386         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
4387         if (!sinfoattr)
4388                 goto nla_put_failure;
4389
4390 #define PUT_SINFO(attr, memb, type) do {                                \
4391         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
4392         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4393             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
4394                              sinfo->memb))                              \
4395                 goto nla_put_failure;                                   \
4396         } while (0)
4397 #define PUT_SINFO_U64(attr, memb) do {                                  \
4398         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4399             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
4400                               sinfo->memb, NL80211_STA_INFO_PAD))       \
4401                 goto nla_put_failure;                                   \
4402         } while (0)
4403
4404         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
4405         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
4406
4407         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
4408                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
4409             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
4410                         (u32)sinfo->rx_bytes))
4411                 goto nla_put_failure;
4412
4413         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
4414                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
4415             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
4416                         (u32)sinfo->tx_bytes))
4417                 goto nla_put_failure;
4418
4419         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
4420         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
4421         PUT_SINFO(LLID, llid, u16);
4422         PUT_SINFO(PLID, plid, u16);
4423         PUT_SINFO(PLINK_STATE, plink_state, u8);
4424         PUT_SINFO_U64(RX_DURATION, rx_duration);
4425
4426         switch (rdev->wiphy.signal_type) {
4427         case CFG80211_SIGNAL_TYPE_MBM:
4428                 PUT_SINFO(SIGNAL, signal, u8);
4429                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
4430                 break;
4431         default:
4432                 break;
4433         }
4434         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
4435                 if (!nl80211_put_signal(msg, sinfo->chains,
4436                                         sinfo->chain_signal,
4437                                         NL80211_STA_INFO_CHAIN_SIGNAL))
4438                         goto nla_put_failure;
4439         }
4440         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
4441                 if (!nl80211_put_signal(msg, sinfo->chains,
4442                                         sinfo->chain_signal_avg,
4443                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
4444                         goto nla_put_failure;
4445         }
4446         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
4447                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
4448                                           NL80211_STA_INFO_TX_BITRATE))
4449                         goto nla_put_failure;
4450         }
4451         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
4452                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
4453                                           NL80211_STA_INFO_RX_BITRATE))
4454                         goto nla_put_failure;
4455         }
4456
4457         PUT_SINFO(RX_PACKETS, rx_packets, u32);
4458         PUT_SINFO(TX_PACKETS, tx_packets, u32);
4459         PUT_SINFO(TX_RETRIES, tx_retries, u32);
4460         PUT_SINFO(TX_FAILED, tx_failed, u32);
4461         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
4462         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
4463         PUT_SINFO(LOCAL_PM, local_pm, u32);
4464         PUT_SINFO(PEER_PM, peer_pm, u32);
4465         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
4466
4467         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
4468                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
4469                 if (!bss_param)
4470                         goto nla_put_failure;
4471
4472                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
4473                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
4474                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
4475                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
4476                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
4477                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
4478                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
4479                                sinfo->bss_param.dtim_period) ||
4480                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
4481                                 sinfo->bss_param.beacon_interval))
4482                         goto nla_put_failure;
4483
4484                 nla_nest_end(msg, bss_param);
4485         }
4486         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
4487             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
4488                     sizeof(struct nl80211_sta_flag_update),
4489                     &sinfo->sta_flags))
4490                 goto nla_put_failure;
4491
4492         PUT_SINFO_U64(T_OFFSET, t_offset);
4493         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
4494         PUT_SINFO_U64(BEACON_RX, rx_beacon);
4495         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
4496         PUT_SINFO(ACK_SIGNAL, ack_signal, u8);
4497
4498 #undef PUT_SINFO
4499 #undef PUT_SINFO_U64
4500
4501         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
4502                 struct nlattr *tidsattr;
4503                 int tid;
4504
4505                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
4506                 if (!tidsattr)
4507                         goto nla_put_failure;
4508
4509                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
4510                         struct cfg80211_tid_stats *tidstats;
4511                         struct nlattr *tidattr;
4512
4513                         tidstats = &sinfo->pertid[tid];
4514
4515                         if (!tidstats->filled)
4516                                 continue;
4517
4518                         tidattr = nla_nest_start(msg, tid + 1);
4519                         if (!tidattr)
4520                                 goto nla_put_failure;
4521
4522 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
4523         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
4524             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
4525                               tidstats->memb, NL80211_TID_STATS_PAD))   \
4526                 goto nla_put_failure;                                   \
4527         } while (0)
4528
4529                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
4530                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
4531                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
4532                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
4533
4534 #undef PUT_TIDVAL_U64
4535                         nla_nest_end(msg, tidattr);
4536                 }
4537
4538                 nla_nest_end(msg, tidsattr);
4539         }
4540
4541         nla_nest_end(msg, sinfoattr);
4542
4543         if (sinfo->assoc_req_ies_len &&
4544             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
4545                     sinfo->assoc_req_ies))
4546                 goto nla_put_failure;
4547
4548         genlmsg_end(msg, hdr);
4549         return 0;
4550
4551  nla_put_failure:
4552         genlmsg_cancel(msg, hdr);
4553         return -EMSGSIZE;
4554 }
4555
4556 static int nl80211_dump_station(struct sk_buff *skb,
4557                                 struct netlink_callback *cb)
4558 {
4559         struct station_info sinfo;
4560         struct cfg80211_registered_device *rdev;
4561         struct wireless_dev *wdev;
4562         u8 mac_addr[ETH_ALEN];
4563         int sta_idx = cb->args[2];
4564         int err;
4565
4566         rtnl_lock();
4567         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4568         if (err)
4569                 goto out_err;
4570
4571         if (!wdev->netdev) {
4572                 err = -EINVAL;
4573                 goto out_err;
4574         }
4575
4576         if (!rdev->ops->dump_station) {
4577                 err = -EOPNOTSUPP;
4578                 goto out_err;
4579         }
4580
4581         while (1) {
4582                 memset(&sinfo, 0, sizeof(sinfo));
4583                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4584                                         mac_addr, &sinfo);
4585                 if (err == -ENOENT)
4586                         break;
4587                 if (err)
4588                         goto out_err;
4589
4590                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4591                                 NETLINK_CB(cb->skb).portid,
4592                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4593                                 rdev, wdev->netdev, mac_addr,
4594                                 &sinfo) < 0)
4595                         goto out;
4596
4597                 sta_idx++;
4598         }
4599
4600  out:
4601         cb->args[2] = sta_idx;
4602         err = skb->len;
4603  out_err:
4604         rtnl_unlock();
4605
4606         return err;
4607 }
4608
4609 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4610 {
4611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4612         struct net_device *dev = info->user_ptr[1];
4613         struct station_info sinfo;
4614         struct sk_buff *msg;
4615         u8 *mac_addr = NULL;
4616         int err;
4617
4618         memset(&sinfo, 0, sizeof(sinfo));
4619
4620         if (!info->attrs[NL80211_ATTR_MAC])
4621                 return -EINVAL;
4622
4623         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4624
4625         if (!rdev->ops->get_station)
4626                 return -EOPNOTSUPP;
4627
4628         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4629         if (err)
4630                 return err;
4631
4632         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4633         if (!msg)
4634                 return -ENOMEM;
4635
4636         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4637                                  info->snd_portid, info->snd_seq, 0,
4638                                  rdev, dev, mac_addr, &sinfo) < 0) {
4639                 nlmsg_free(msg);
4640                 return -ENOBUFS;
4641         }
4642
4643         return genlmsg_reply(msg, info);
4644 }
4645
4646 int cfg80211_check_station_change(struct wiphy *wiphy,
4647                                   struct station_parameters *params,
4648                                   enum cfg80211_station_type statype)
4649 {
4650         if (params->listen_interval != -1 &&
4651             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4652                 return -EINVAL;
4653
4654         if (params->support_p2p_ps != -1 &&
4655             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4656                 return -EINVAL;
4657
4658         if (params->aid &&
4659             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4660             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4661                 return -EINVAL;
4662
4663         /* When you run into this, adjust the code below for the new flag */
4664         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4665
4666         switch (statype) {
4667         case CFG80211_STA_MESH_PEER_KERNEL:
4668         case CFG80211_STA_MESH_PEER_USER:
4669                 /*
4670                  * No ignoring the TDLS flag here -- the userspace mesh
4671                  * code doesn't have the bug of including TDLS in the
4672                  * mask everywhere.
4673                  */
4674                 if (params->sta_flags_mask &
4675                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4676                                   BIT(NL80211_STA_FLAG_MFP) |
4677                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4678                         return -EINVAL;
4679                 break;
4680         case CFG80211_STA_TDLS_PEER_SETUP:
4681         case CFG80211_STA_TDLS_PEER_ACTIVE:
4682                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4683                         return -EINVAL;
4684                 /* ignore since it can't change */
4685                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4686                 break;
4687         default:
4688                 /* disallow mesh-specific things */
4689                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4690                         return -EINVAL;
4691                 if (params->local_pm)
4692                         return -EINVAL;
4693                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4694                         return -EINVAL;
4695         }
4696
4697         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4698             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4699                 /* TDLS can't be set, ... */
4700                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4701                         return -EINVAL;
4702                 /*
4703                  * ... but don't bother the driver with it. This works around
4704                  * a hostapd/wpa_supplicant issue -- it always includes the
4705                  * TLDS_PEER flag in the mask even for AP mode.
4706                  */
4707                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4708         }
4709
4710         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4711             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4712                 /* reject other things that can't change */
4713                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4714                         return -EINVAL;
4715                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4716                         return -EINVAL;
4717                 if (params->supported_rates)
4718                         return -EINVAL;
4719                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4720                         return -EINVAL;
4721         }
4722
4723         if (statype != CFG80211_STA_AP_CLIENT &&
4724             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4725                 if (params->vlan)
4726                         return -EINVAL;
4727         }
4728
4729         switch (statype) {
4730         case CFG80211_STA_AP_MLME_CLIENT:
4731                 /* Use this only for authorizing/unauthorizing a station */
4732                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4733                         return -EOPNOTSUPP;
4734                 break;
4735         case CFG80211_STA_AP_CLIENT:
4736         case CFG80211_STA_AP_CLIENT_UNASSOC:
4737                 /* accept only the listed bits */
4738                 if (params->sta_flags_mask &
4739                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4740                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4741                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4742                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4743                                   BIT(NL80211_STA_FLAG_WME) |
4744                                   BIT(NL80211_STA_FLAG_MFP)))
4745                         return -EINVAL;
4746
4747                 /* but authenticated/associated only if driver handles it */
4748                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4749                     params->sta_flags_mask &
4750                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4751                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4752                         return -EINVAL;
4753                 break;
4754         case CFG80211_STA_IBSS:
4755         case CFG80211_STA_AP_STA:
4756                 /* reject any changes other than AUTHORIZED */
4757                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4758                         return -EINVAL;
4759                 break;
4760         case CFG80211_STA_TDLS_PEER_SETUP:
4761                 /* reject any changes other than AUTHORIZED or WME */
4762                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4763                                                BIT(NL80211_STA_FLAG_WME)))
4764                         return -EINVAL;
4765                 /* force (at least) rates when authorizing */
4766                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4767                     !params->supported_rates)
4768                         return -EINVAL;
4769                 break;
4770         case CFG80211_STA_TDLS_PEER_ACTIVE:
4771                 /* reject any changes */
4772                 return -EINVAL;
4773         case CFG80211_STA_MESH_PEER_KERNEL:
4774                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4775                         return -EINVAL;
4776                 break;
4777         case CFG80211_STA_MESH_PEER_USER:
4778                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4779                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4780                         return -EINVAL;
4781                 break;
4782         }
4783
4784         /*
4785          * Older kernel versions ignored this attribute entirely, so don't
4786          * reject attempts to update it but mark it as unused instead so the
4787          * driver won't look at the data.
4788          */
4789         if (statype != CFG80211_STA_AP_CLIENT_UNASSOC &&
4790             statype != CFG80211_STA_TDLS_PEER_SETUP)
4791                 params->opmode_notif_used = false;
4792
4793         return 0;
4794 }
4795 EXPORT_SYMBOL(cfg80211_check_station_change);
4796
4797 /*
4798  * Get vlan interface making sure it is running and on the right wiphy.
4799  */
4800 static struct net_device *get_vlan(struct genl_info *info,
4801                                    struct cfg80211_registered_device *rdev)
4802 {
4803         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4804         struct net_device *v;
4805         int ret;
4806
4807         if (!vlanattr)
4808                 return NULL;
4809
4810         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4811         if (!v)
4812                 return ERR_PTR(-ENODEV);
4813
4814         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4815                 ret = -EINVAL;
4816                 goto error;
4817         }
4818
4819         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4820             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4821             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4822                 ret = -EINVAL;
4823                 goto error;
4824         }
4825
4826         if (!netif_running(v)) {
4827                 ret = -ENETDOWN;
4828                 goto error;
4829         }
4830
4831         return v;
4832  error:
4833         dev_put(v);
4834         return ERR_PTR(ret);
4835 }
4836
4837 static const struct nla_policy
4838 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4839         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4840         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4841 };
4842
4843 static int nl80211_parse_sta_wme(struct genl_info *info,
4844                                  struct station_parameters *params)
4845 {
4846         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4847         struct nlattr *nla;
4848         int err;
4849
4850         /* parse WME attributes if present */
4851         if (!info->attrs[NL80211_ATTR_STA_WME])
4852                 return 0;
4853
4854         nla = info->attrs[NL80211_ATTR_STA_WME];
4855         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4856                                nl80211_sta_wme_policy, info->extack);
4857         if (err)
4858                 return err;
4859
4860         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4861                 params->uapsd_queues = nla_get_u8(
4862                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4863         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4864                 return -EINVAL;
4865
4866         if (tb[NL80211_STA_WME_MAX_SP])
4867                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4868
4869         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4870                 return -EINVAL;
4871
4872         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4873
4874         return 0;
4875 }
4876
4877 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4878                                       struct station_parameters *params)
4879 {
4880         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4881                 params->supported_channels =
4882                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4883                 params->supported_channels_len =
4884                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4885                 /*
4886                  * Need to include at least one (first channel, number of
4887                  * channels) tuple for each subband, and must have proper
4888                  * tuples for the rest of the data as well.
4889                  */
4890                 if (params->supported_channels_len < 2)
4891                         return -EINVAL;
4892                 if (params->supported_channels_len % 2)
4893                         return -EINVAL;
4894         }
4895
4896         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4897                 params->supported_oper_classes =
4898                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4899                 params->supported_oper_classes_len =
4900                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4901                 /*
4902                  * The value of the Length field of the Supported Operating
4903                  * Classes element is between 2 and 253.
4904                  */
4905                 if (params->supported_oper_classes_len < 2 ||
4906                     params->supported_oper_classes_len > 253)
4907                         return -EINVAL;
4908         }
4909         return 0;
4910 }
4911
4912 static int nl80211_set_station_tdls(struct genl_info *info,
4913                                     struct station_parameters *params)
4914 {
4915         int err;
4916         /* Dummy STA entry gets updated once the peer capabilities are known */
4917         if (info->attrs[NL80211_ATTR_PEER_AID])
4918                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4919         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4920                 params->ht_capa =
4921                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4922         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4923                 params->vht_capa =
4924                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4925
4926         err = nl80211_parse_sta_channel_info(info, params);
4927         if (err)
4928                 return err;
4929
4930         return nl80211_parse_sta_wme(info, params);
4931 }
4932
4933 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4934 {
4935         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4936         struct net_device *dev = info->user_ptr[1];
4937         struct station_parameters params;
4938         u8 *mac_addr;
4939         int err;
4940
4941         memset(&params, 0, sizeof(params));
4942
4943         if (!rdev->ops->change_station)
4944                 return -EOPNOTSUPP;
4945
4946         /*
4947          * AID and listen_interval properties can be set only for unassociated
4948          * station. Include these parameters here and will check them in
4949          * cfg80211_check_station_change().
4950          */
4951         if (info->attrs[NL80211_ATTR_STA_AID])
4952                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4953
4954         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4955                 params.listen_interval =
4956                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4957         else
4958                 params.listen_interval = -1;
4959
4960         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4961                 u8 tmp;
4962
4963                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4964                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4965                         return -EINVAL;
4966
4967                 params.support_p2p_ps = tmp;
4968         } else {
4969                 params.support_p2p_ps = -1;
4970         }
4971
4972         if (!info->attrs[NL80211_ATTR_MAC])
4973                 return -EINVAL;
4974
4975         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4976
4977         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4978                 params.supported_rates =
4979                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4980                 params.supported_rates_len =
4981                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4982         }
4983
4984         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4985                 params.capability =
4986                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4987                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4988         }
4989
4990         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4991                 params.ext_capab =
4992                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4993                 params.ext_capab_len =
4994                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4995         }
4996
4997         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4998                 return -EINVAL;
4999
5000         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
5001                 params.plink_action =
5002                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
5003                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
5004                         return -EINVAL;
5005         }
5006
5007         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
5008                 params.plink_state =
5009                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
5010                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
5011                         return -EINVAL;
5012                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
5013                         params.peer_aid = nla_get_u16(
5014                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
5015                         if (params.peer_aid > IEEE80211_MAX_AID)
5016                                 return -EINVAL;
5017                 }
5018                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
5019         }
5020
5021         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
5022                 enum nl80211_mesh_power_mode pm = nla_get_u32(
5023                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
5024
5025                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
5026                     pm > NL80211_MESH_POWER_MAX)
5027                         return -EINVAL;
5028
5029                 params.local_pm = pm;
5030         }
5031
5032         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
5033                 params.opmode_notif_used = true;
5034                 params.opmode_notif =
5035                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
5036         }
5037
5038         /* Include parameters for TDLS peer (will check later) */
5039         err = nl80211_set_station_tdls(info, &params);
5040         if (err)
5041                 return err;
5042
5043         params.vlan = get_vlan(info, rdev);
5044         if (IS_ERR(params.vlan))
5045                 return PTR_ERR(params.vlan);
5046
5047         switch (dev->ieee80211_ptr->iftype) {
5048         case NL80211_IFTYPE_AP:
5049         case NL80211_IFTYPE_AP_VLAN:
5050         case NL80211_IFTYPE_P2P_GO:
5051         case NL80211_IFTYPE_P2P_CLIENT:
5052         case NL80211_IFTYPE_STATION:
5053         case NL80211_IFTYPE_ADHOC:
5054         case NL80211_IFTYPE_MESH_POINT:
5055                 break;
5056         default:
5057                 err = -EOPNOTSUPP;
5058                 goto out_put_vlan;
5059         }
5060
5061         /* driver will call cfg80211_check_station_change() */
5062         err = rdev_change_station(rdev, dev, mac_addr, &params);
5063
5064  out_put_vlan:
5065         if (params.vlan)
5066                 dev_put(params.vlan);
5067
5068         return err;
5069 }
5070
5071 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
5072 {
5073         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5074         int err;
5075         struct net_device *dev = info->user_ptr[1];
5076         struct station_parameters params;
5077         u8 *mac_addr = NULL;
5078         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
5079                          BIT(NL80211_STA_FLAG_ASSOCIATED);
5080
5081         memset(&params, 0, sizeof(params));
5082
5083         if (!rdev->ops->add_station)
5084                 return -EOPNOTSUPP;
5085
5086         if (!info->attrs[NL80211_ATTR_MAC])
5087                 return -EINVAL;
5088
5089         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
5090                 return -EINVAL;
5091
5092         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
5093                 return -EINVAL;
5094
5095         if (!info->attrs[NL80211_ATTR_STA_AID] &&
5096             !info->attrs[NL80211_ATTR_PEER_AID])
5097                 return -EINVAL;
5098
5099         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
5100         params.supported_rates =
5101                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
5102         params.supported_rates_len =
5103                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
5104         params.listen_interval =
5105                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
5106
5107         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
5108                 u8 tmp;
5109
5110                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
5111                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
5112                         return -EINVAL;
5113
5114                 params.support_p2p_ps = tmp;
5115         } else {
5116                 /*
5117                  * if not specified, assume it's supported for P2P GO interface,
5118                  * and is NOT supported for AP interface
5119                  */
5120                 params.support_p2p_ps =
5121                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
5122         }
5123
5124         if (info->attrs[NL80211_ATTR_PEER_AID])
5125                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
5126         else
5127                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
5128         if (!params.aid || params.aid > IEEE80211_MAX_AID)
5129                 return -EINVAL;
5130
5131         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
5132                 params.capability =
5133                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
5134                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
5135         }
5136
5137         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
5138                 params.ext_capab =
5139                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
5140                 params.ext_capab_len =
5141                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
5142         }
5143
5144         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
5145                 params.ht_capa =
5146                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5147
5148         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
5149                 params.vht_capa =
5150                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
5151
5152         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
5153                 params.opmode_notif_used = true;
5154                 params.opmode_notif =
5155                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
5156         }
5157
5158         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
5159                 params.plink_action =
5160                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
5161                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
5162                         return -EINVAL;
5163         }
5164
5165         err = nl80211_parse_sta_channel_info(info, &params);
5166         if (err)
5167                 return err;
5168
5169         err = nl80211_parse_sta_wme(info, &params);
5170         if (err)
5171                 return err;
5172
5173         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
5174                 return -EINVAL;
5175
5176         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
5177          * as userspace might just pass through the capabilities from the IEs
5178          * directly, rather than enforcing this restriction and returning an
5179          * error in this case.
5180          */
5181         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
5182                 params.ht_capa = NULL;
5183                 params.vht_capa = NULL;
5184         }
5185
5186         /* When you run into this, adjust the code below for the new flag */
5187         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
5188
5189         switch (dev->ieee80211_ptr->iftype) {
5190         case NL80211_IFTYPE_AP:
5191         case NL80211_IFTYPE_AP_VLAN:
5192         case NL80211_IFTYPE_P2P_GO:
5193                 /* ignore WME attributes if iface/sta is not capable */
5194                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
5195                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
5196                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5197
5198                 /* TDLS peers cannot be added */
5199                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5200                     info->attrs[NL80211_ATTR_PEER_AID])
5201                         return -EINVAL;
5202                 /* but don't bother the driver with it */
5203                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
5204
5205                 /* allow authenticated/associated only if driver handles it */
5206                 if (!(rdev->wiphy.features &
5207                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
5208                     params.sta_flags_mask & auth_assoc)
5209                         return -EINVAL;
5210
5211                 /* Older userspace, or userspace wanting to be compatible with
5212                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
5213                  * and assoc flags in the mask, but assumes the station will be
5214                  * added as associated anyway since this was the required driver
5215                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
5216                  * introduced.
5217                  * In order to not bother drivers with this quirk in the API
5218                  * set the flags in both the mask and set for new stations in
5219                  * this case.
5220                  */
5221                 if (!(params.sta_flags_mask & auth_assoc)) {
5222                         params.sta_flags_mask |= auth_assoc;
5223                         params.sta_flags_set |= auth_assoc;
5224                 }
5225
5226                 /* must be last in here for error handling */
5227                 params.vlan = get_vlan(info, rdev);
5228                 if (IS_ERR(params.vlan))
5229                         return PTR_ERR(params.vlan);
5230                 break;
5231         case NL80211_IFTYPE_MESH_POINT:
5232                 /* ignore uAPSD data */
5233                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5234
5235                 /* associated is disallowed */
5236                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
5237                         return -EINVAL;
5238                 /* TDLS peers cannot be added */
5239                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5240                     info->attrs[NL80211_ATTR_PEER_AID])
5241                         return -EINVAL;
5242                 break;
5243         case NL80211_IFTYPE_STATION:
5244         case NL80211_IFTYPE_P2P_CLIENT:
5245                 /* ignore uAPSD data */
5246                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5247
5248                 /* these are disallowed */
5249                 if (params.sta_flags_mask &
5250                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
5251                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
5252                         return -EINVAL;
5253                 /* Only TDLS peers can be added */
5254                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
5255                         return -EINVAL;
5256                 /* Can only add if TDLS ... */
5257                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
5258                         return -EOPNOTSUPP;
5259                 /* ... with external setup is supported */
5260                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
5261                         return -EOPNOTSUPP;
5262                 /*
5263                  * Older wpa_supplicant versions always mark the TDLS peer
5264                  * as authorized, but it shouldn't yet be.
5265                  */
5266                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
5267                 break;
5268         default:
5269                 return -EOPNOTSUPP;
5270         }
5271
5272         /* be aware of params.vlan when changing code here */
5273
5274         err = rdev_add_station(rdev, dev, mac_addr, &params);
5275
5276         if (params.vlan)
5277                 dev_put(params.vlan);
5278         return err;
5279 }
5280
5281 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
5282 {
5283         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5284         struct net_device *dev = info->user_ptr[1];
5285         struct station_del_parameters params;
5286
5287         memset(&params, 0, sizeof(params));
5288
5289         if (info->attrs[NL80211_ATTR_MAC])
5290                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
5291
5292         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5293             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5294             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5295             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5296                 return -EINVAL;
5297
5298         if (!rdev->ops->del_station)
5299                 return -EOPNOTSUPP;
5300
5301         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
5302                 params.subtype =
5303                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
5304                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
5305                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
5306                         return -EINVAL;
5307         } else {
5308                 /* Default to Deauthentication frame */
5309                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
5310         }
5311
5312         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
5313                 params.reason_code =
5314                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5315                 if (params.reason_code == 0)
5316                         return -EINVAL; /* 0 is reserved */
5317         } else {
5318                 /* Default to reason code 2 */
5319                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
5320         }
5321
5322         return rdev_del_station(rdev, dev, &params);
5323 }
5324
5325 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
5326                                 int flags, struct net_device *dev,
5327                                 u8 *dst, u8 *next_hop,
5328                                 struct mpath_info *pinfo)
5329 {
5330         void *hdr;
5331         struct nlattr *pinfoattr;
5332
5333         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
5334         if (!hdr)
5335                 return -1;
5336
5337         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5338             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
5339             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
5340             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
5341                 goto nla_put_failure;
5342
5343         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
5344         if (!pinfoattr)
5345                 goto nla_put_failure;
5346         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
5347             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
5348                         pinfo->frame_qlen))
5349                 goto nla_put_failure;
5350         if (((pinfo->filled & MPATH_INFO_SN) &&
5351              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
5352             ((pinfo->filled & MPATH_INFO_METRIC) &&
5353              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
5354                          pinfo->metric)) ||
5355             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
5356              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
5357                          pinfo->exptime)) ||
5358             ((pinfo->filled & MPATH_INFO_FLAGS) &&
5359              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
5360                         pinfo->flags)) ||
5361             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
5362              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
5363                          pinfo->discovery_timeout)) ||
5364             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
5365              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
5366                         pinfo->discovery_retries)))
5367                 goto nla_put_failure;
5368
5369         nla_nest_end(msg, pinfoattr);
5370
5371         genlmsg_end(msg, hdr);
5372         return 0;
5373
5374  nla_put_failure:
5375         genlmsg_cancel(msg, hdr);
5376         return -EMSGSIZE;
5377 }
5378
5379 static int nl80211_dump_mpath(struct sk_buff *skb,
5380                               struct netlink_callback *cb)
5381 {
5382         struct mpath_info pinfo;
5383         struct cfg80211_registered_device *rdev;
5384         struct wireless_dev *wdev;
5385         u8 dst[ETH_ALEN];
5386         u8 next_hop[ETH_ALEN];
5387         int path_idx = cb->args[2];
5388         int err;
5389
5390         rtnl_lock();
5391         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5392         if (err)
5393                 goto out_err;
5394
5395         if (!rdev->ops->dump_mpath) {
5396                 err = -EOPNOTSUPP;
5397                 goto out_err;
5398         }
5399
5400         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5401                 err = -EOPNOTSUPP;
5402                 goto out_err;
5403         }
5404
5405         while (1) {
5406                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
5407                                       next_hop, &pinfo);
5408                 if (err == -ENOENT)
5409                         break;
5410                 if (err)
5411                         goto out_err;
5412
5413                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5414                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5415                                        wdev->netdev, dst, next_hop,
5416                                        &pinfo) < 0)
5417                         goto out;
5418
5419                 path_idx++;
5420         }
5421
5422  out:
5423         cb->args[2] = path_idx;
5424         err = skb->len;
5425  out_err:
5426         rtnl_unlock();
5427         return err;
5428 }
5429
5430 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
5431 {
5432         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5433         int err;
5434         struct net_device *dev = info->user_ptr[1];
5435         struct mpath_info pinfo;
5436         struct sk_buff *msg;
5437         u8 *dst = NULL;
5438         u8 next_hop[ETH_ALEN];
5439
5440         memset(&pinfo, 0, sizeof(pinfo));
5441
5442         if (!info->attrs[NL80211_ATTR_MAC])
5443                 return -EINVAL;
5444
5445         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5446
5447         if (!rdev->ops->get_mpath)
5448                 return -EOPNOTSUPP;
5449
5450         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5451                 return -EOPNOTSUPP;
5452
5453         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
5454         if (err)
5455                 return err;
5456
5457         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5458         if (!msg)
5459                 return -ENOMEM;
5460
5461         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5462                                  dev, dst, next_hop, &pinfo) < 0) {
5463                 nlmsg_free(msg);
5464                 return -ENOBUFS;
5465         }
5466
5467         return genlmsg_reply(msg, info);
5468 }
5469
5470 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
5471 {
5472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5473         struct net_device *dev = info->user_ptr[1];
5474         u8 *dst = NULL;
5475         u8 *next_hop = NULL;
5476
5477         if (!info->attrs[NL80211_ATTR_MAC])
5478                 return -EINVAL;
5479
5480         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5481                 return -EINVAL;
5482
5483         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5484         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5485
5486         if (!rdev->ops->change_mpath)
5487                 return -EOPNOTSUPP;
5488
5489         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5490                 return -EOPNOTSUPP;
5491
5492         return rdev_change_mpath(rdev, dev, dst, next_hop);
5493 }
5494
5495 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
5496 {
5497         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5498         struct net_device *dev = info->user_ptr[1];
5499         u8 *dst = NULL;
5500         u8 *next_hop = NULL;
5501
5502         if (!info->attrs[NL80211_ATTR_MAC])
5503                 return -EINVAL;
5504
5505         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5506                 return -EINVAL;
5507
5508         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5509         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5510
5511         if (!rdev->ops->add_mpath)
5512                 return -EOPNOTSUPP;
5513
5514         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5515                 return -EOPNOTSUPP;
5516
5517         return rdev_add_mpath(rdev, dev, dst, next_hop);
5518 }
5519
5520 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
5521 {
5522         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5523         struct net_device *dev = info->user_ptr[1];
5524         u8 *dst = NULL;
5525
5526         if (info->attrs[NL80211_ATTR_MAC])
5527                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5528
5529         if (!rdev->ops->del_mpath)
5530                 return -EOPNOTSUPP;
5531
5532         return rdev_del_mpath(rdev, dev, dst);
5533 }
5534
5535 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
5536 {
5537         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5538         int err;
5539         struct net_device *dev = info->user_ptr[1];
5540         struct mpath_info pinfo;
5541         struct sk_buff *msg;
5542         u8 *dst = NULL;
5543         u8 mpp[ETH_ALEN];
5544
5545         memset(&pinfo, 0, sizeof(pinfo));
5546
5547         if (!info->attrs[NL80211_ATTR_MAC])
5548                 return -EINVAL;
5549
5550         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5551
5552         if (!rdev->ops->get_mpp)
5553                 return -EOPNOTSUPP;
5554
5555         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5556                 return -EOPNOTSUPP;
5557
5558         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
5559         if (err)
5560                 return err;
5561
5562         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5563         if (!msg)
5564                 return -ENOMEM;
5565
5566         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5567                                dev, dst, mpp, &pinfo) < 0) {
5568                 nlmsg_free(msg);
5569                 return -ENOBUFS;
5570         }
5571
5572         return genlmsg_reply(msg, info);
5573 }
5574
5575 static int nl80211_dump_mpp(struct sk_buff *skb,
5576                             struct netlink_callback *cb)
5577 {
5578         struct mpath_info pinfo;
5579         struct cfg80211_registered_device *rdev;
5580         struct wireless_dev *wdev;
5581         u8 dst[ETH_ALEN];
5582         u8 mpp[ETH_ALEN];
5583         int path_idx = cb->args[2];
5584         int err;
5585
5586         rtnl_lock();
5587         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5588         if (err)
5589                 goto out_err;
5590
5591         if (!rdev->ops->dump_mpp) {
5592                 err = -EOPNOTSUPP;
5593                 goto out_err;
5594         }
5595
5596         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5597                 err = -EOPNOTSUPP;
5598                 goto out_err;
5599         }
5600
5601         while (1) {
5602                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5603                                     mpp, &pinfo);
5604                 if (err == -ENOENT)
5605                         break;
5606                 if (err)
5607                         goto out_err;
5608
5609                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5610                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5611                                        wdev->netdev, dst, mpp,
5612                                        &pinfo) < 0)
5613                         goto out;
5614
5615                 path_idx++;
5616         }
5617
5618  out:
5619         cb->args[2] = path_idx;
5620         err = skb->len;
5621  out_err:
5622         rtnl_unlock();
5623         return err;
5624 }
5625
5626 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5627 {
5628         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5629         struct net_device *dev = info->user_ptr[1];
5630         struct wireless_dev *wdev = dev->ieee80211_ptr;
5631         struct bss_parameters params;
5632         int err;
5633
5634         memset(&params, 0, sizeof(params));
5635         /* default to not changing parameters */
5636         params.use_cts_prot = -1;
5637         params.use_short_preamble = -1;
5638         params.use_short_slot_time = -1;
5639         params.ap_isolate = -1;
5640         params.ht_opmode = -1;
5641         params.p2p_ctwindow = -1;
5642         params.p2p_opp_ps = -1;
5643
5644         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5645                 params.use_cts_prot =
5646                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5647         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5648                 params.use_short_preamble =
5649                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5650         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5651                 params.use_short_slot_time =
5652                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5653         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5654                 params.basic_rates =
5655                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5656                 params.basic_rates_len =
5657                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5658         }
5659         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5660                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5661         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5662                 params.ht_opmode =
5663                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5664
5665         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5666                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5667                         return -EINVAL;
5668                 params.p2p_ctwindow =
5669                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5670                 if (params.p2p_ctwindow < 0)
5671                         return -EINVAL;
5672                 if (params.p2p_ctwindow != 0 &&
5673                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5674                         return -EINVAL;
5675         }
5676
5677         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5678                 u8 tmp;
5679
5680                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5681                         return -EINVAL;
5682                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5683                 if (tmp > 1)
5684                         return -EINVAL;
5685                 params.p2p_opp_ps = tmp;
5686                 if (params.p2p_opp_ps &&
5687                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5688                         return -EINVAL;
5689         }
5690
5691         if (!rdev->ops->change_bss)
5692                 return -EOPNOTSUPP;
5693
5694         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5695             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5696                 return -EOPNOTSUPP;
5697
5698         wdev_lock(wdev);
5699         err = rdev_change_bss(rdev, dev, &params);
5700         wdev_unlock(wdev);
5701
5702         return err;
5703 }
5704
5705 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5706 {
5707         char *data = NULL;
5708         bool is_indoor;
5709         enum nl80211_user_reg_hint_type user_reg_hint_type;
5710         u32 owner_nlportid;
5711
5712         /*
5713          * You should only get this when cfg80211 hasn't yet initialized
5714          * completely when built-in to the kernel right between the time
5715          * window between nl80211_init() and regulatory_init(), if that is
5716          * even possible.
5717          */
5718         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5719                 return -EINPROGRESS;
5720
5721         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5722                 user_reg_hint_type =
5723                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5724         else
5725                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5726
5727         switch (user_reg_hint_type) {
5728         case NL80211_USER_REG_HINT_USER:
5729         case NL80211_USER_REG_HINT_CELL_BASE:
5730                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5731                         return -EINVAL;
5732
5733                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5734                 return regulatory_hint_user(data, user_reg_hint_type);
5735         case NL80211_USER_REG_HINT_INDOOR:
5736                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5737                         owner_nlportid = info->snd_portid;
5738                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5739                 } else {
5740                         owner_nlportid = 0;
5741                         is_indoor = true;
5742                 }
5743
5744                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5745         default:
5746                 return -EINVAL;
5747         }
5748 }
5749
5750 static int nl80211_reload_regdb(struct sk_buff *skb, struct genl_info *info)
5751 {
5752         return reg_reload_regdb();
5753 }
5754
5755 static int nl80211_get_mesh_config(struct sk_buff *skb,
5756                                    struct genl_info *info)
5757 {
5758         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5759         struct net_device *dev = info->user_ptr[1];
5760         struct wireless_dev *wdev = dev->ieee80211_ptr;
5761         struct mesh_config cur_params;
5762         int err = 0;
5763         void *hdr;
5764         struct nlattr *pinfoattr;
5765         struct sk_buff *msg;
5766
5767         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5768                 return -EOPNOTSUPP;
5769
5770         if (!rdev->ops->get_mesh_config)
5771                 return -EOPNOTSUPP;
5772
5773         wdev_lock(wdev);
5774         /* If not connected, get default parameters */
5775         if (!wdev->mesh_id_len)
5776                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5777         else
5778                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5779         wdev_unlock(wdev);
5780
5781         if (err)
5782                 return err;
5783
5784         /* Draw up a netlink message to send back */
5785         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5786         if (!msg)
5787                 return -ENOMEM;
5788         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5789                              NL80211_CMD_GET_MESH_CONFIG);
5790         if (!hdr)
5791                 goto out;
5792         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5793         if (!pinfoattr)
5794                 goto nla_put_failure;
5795         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5796             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5797                         cur_params.dot11MeshRetryTimeout) ||
5798             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5799                         cur_params.dot11MeshConfirmTimeout) ||
5800             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5801                         cur_params.dot11MeshHoldingTimeout) ||
5802             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5803                         cur_params.dot11MeshMaxPeerLinks) ||
5804             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5805                        cur_params.dot11MeshMaxRetries) ||
5806             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5807                        cur_params.dot11MeshTTL) ||
5808             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5809                        cur_params.element_ttl) ||
5810             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5811                        cur_params.auto_open_plinks) ||
5812             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5813                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5814             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5815                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5816             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5817                         cur_params.path_refresh_time) ||
5818             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5819                         cur_params.min_discovery_timeout) ||
5820             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5821                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5822             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5823                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5824             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5825                         cur_params.dot11MeshHWMPperrMinInterval) ||
5826             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5827                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5828             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5829                        cur_params.dot11MeshHWMPRootMode) ||
5830             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5831                         cur_params.dot11MeshHWMPRannInterval) ||
5832             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5833                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5834             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5835                        cur_params.dot11MeshForwarding) ||
5836             nla_put_s32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5837                         cur_params.rssi_threshold) ||
5838             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5839                         cur_params.ht_opmode) ||
5840             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5841                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5842             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5843                         cur_params.dot11MeshHWMProotInterval) ||
5844             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5845                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5846             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5847                         cur_params.power_mode) ||
5848             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5849                         cur_params.dot11MeshAwakeWindowDuration) ||
5850             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5851                         cur_params.plink_timeout))
5852                 goto nla_put_failure;
5853         nla_nest_end(msg, pinfoattr);
5854         genlmsg_end(msg, hdr);
5855         return genlmsg_reply(msg, info);
5856
5857  nla_put_failure:
5858  out:
5859         nlmsg_free(msg);
5860         return -ENOBUFS;
5861 }
5862
5863 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5864         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5865         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5866         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5867         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5868         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5869         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5870         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5871         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5872         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5873         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5874         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5875         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5876         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5877         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5878         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5879         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5880         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5881         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5882         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5883         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5884         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5885         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5886         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5887         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5888         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5889         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5890         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5891         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5892 };
5893
5894 static const struct nla_policy
5895         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5896         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5897         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5898         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5899         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5900         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5901         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5902         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5903                                     .len = IEEE80211_MAX_DATA_LEN },
5904         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5905 };
5906
5907 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5908 {
5909         u8 val = nla_get_u8(nla);
5910         if (val < min || val > max)
5911                 return -EINVAL;
5912         *out = val;
5913         return 0;
5914 }
5915
5916 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5917 {
5918         u8 val = nla_get_u8(nla);
5919         if (val < min || val > max)
5920                 return -EINVAL;
5921         *out = val;
5922         return 0;
5923 }
5924
5925 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5926 {
5927         u16 val = nla_get_u16(nla);
5928         if (val < min || val > max)
5929                 return -EINVAL;
5930         *out = val;
5931         return 0;
5932 }
5933
5934 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5935 {
5936         u32 val = nla_get_u32(nla);
5937         if (val < min || val > max)
5938                 return -EINVAL;
5939         *out = val;
5940         return 0;
5941 }
5942
5943 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5944 {
5945         s32 val = nla_get_s32(nla);
5946         if (val < min || val > max)
5947                 return -EINVAL;
5948         *out = val;
5949         return 0;
5950 }
5951
5952 static int nl80211_check_power_mode(const struct nlattr *nla,
5953                                     enum nl80211_mesh_power_mode min,
5954                                     enum nl80211_mesh_power_mode max,
5955                                     enum nl80211_mesh_power_mode *out)
5956 {
5957         u32 val = nla_get_u32(nla);
5958         if (val < min || val > max)
5959                 return -EINVAL;
5960         *out = val;
5961         return 0;
5962 }
5963
5964 static int nl80211_parse_mesh_config(struct genl_info *info,
5965                                      struct mesh_config *cfg,
5966                                      u32 *mask_out)
5967 {
5968         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5969         u32 mask = 0;
5970         u16 ht_opmode;
5971
5972 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5973 do {                                                                        \
5974         if (tb[attr]) {                                                     \
5975                 if (fn(tb[attr], min, max, &cfg->param))                    \
5976                         return -EINVAL;                                     \
5977                 mask |= (1 << (attr - 1));                                  \
5978         }                                                                   \
5979 } while (0)
5980
5981         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5982                 return -EINVAL;
5983         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5984                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5985                              nl80211_meshconf_params_policy, info->extack))
5986                 return -EINVAL;
5987
5988         /* This makes sure that there aren't more than 32 mesh config
5989          * parameters (otherwise our bitfield scheme would not work.) */
5990         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5991
5992         /* Fill in the params struct */
5993         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5994                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5995                                   nl80211_check_u16);
5996         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5997                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5998                                   nl80211_check_u16);
5999         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
6000                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
6001                                   nl80211_check_u16);
6002         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
6003                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
6004                                   nl80211_check_u16);
6005         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
6006                                   mask, NL80211_MESHCONF_MAX_RETRIES,
6007                                   nl80211_check_u8);
6008         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
6009                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
6010         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
6011                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
6012                                   nl80211_check_u8);
6013         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
6014                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
6015                                   nl80211_check_bool);
6016         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
6017                                   1, 255, mask,
6018                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
6019                                   nl80211_check_u32);
6020         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
6021                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
6022                                   nl80211_check_u8);
6023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
6024                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
6025                                   nl80211_check_u32);
6026         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
6027                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
6028                                   nl80211_check_u16);
6029         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
6030                                   1, 65535, mask,
6031                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
6032                                   nl80211_check_u32);
6033         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
6034                                   1, 65535, mask,
6035                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
6036                                   nl80211_check_u16);
6037         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
6038                                   1, 65535, mask,
6039                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
6040                                   nl80211_check_u16);
6041         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
6042                                   dot11MeshHWMPnetDiameterTraversalTime,
6043                                   1, 65535, mask,
6044                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
6045                                   nl80211_check_u16);
6046         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
6047                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
6048                                   nl80211_check_u8);
6049         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
6050                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
6051                                   nl80211_check_u16);
6052         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
6053                                   dot11MeshGateAnnouncementProtocol, 0, 1,
6054                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
6055                                   nl80211_check_bool);
6056         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
6057                                   mask, NL80211_MESHCONF_FORWARDING,
6058                                   nl80211_check_bool);
6059         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
6060                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
6061                                   nl80211_check_s32);
6062         /*
6063          * Check HT operation mode based on
6064          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
6065          */
6066         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
6067                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
6068
6069                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
6070                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
6071                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
6072                         return -EINVAL;
6073
6074                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
6075                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
6076                         return -EINVAL;
6077
6078                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
6079                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
6080                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
6081                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
6082                                 return -EINVAL;
6083                         break;
6084                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
6085                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
6086                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
6087                                 return -EINVAL;
6088                         break;
6089                 }
6090                 cfg->ht_opmode = ht_opmode;
6091                 mask |= (1 << (NL80211_MESHCONF_HT_OPMODE - 1));
6092         }
6093         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
6094                                   1, 65535, mask,
6095                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
6096                                   nl80211_check_u32);
6097         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
6098                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
6099                                   nl80211_check_u16);
6100         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
6101                                   dot11MeshHWMPconfirmationInterval,
6102                                   1, 65535, mask,
6103                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
6104                                   nl80211_check_u16);
6105         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
6106                                   NL80211_MESH_POWER_ACTIVE,
6107                                   NL80211_MESH_POWER_MAX,
6108                                   mask, NL80211_MESHCONF_POWER_MODE,
6109                                   nl80211_check_power_mode);
6110         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
6111                                   0, 65535, mask,
6112                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
6113         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
6114                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
6115                                   nl80211_check_u32);
6116         if (mask_out)
6117                 *mask_out = mask;
6118
6119         return 0;
6120
6121 #undef FILL_IN_MESH_PARAM_IF_SET
6122 }
6123
6124 static int nl80211_parse_mesh_setup(struct genl_info *info,
6125                                      struct mesh_setup *setup)
6126 {
6127         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6128         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
6129
6130         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
6131                 return -EINVAL;
6132         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
6133                              info->attrs[NL80211_ATTR_MESH_SETUP],
6134                              nl80211_mesh_setup_params_policy, info->extack))
6135                 return -EINVAL;
6136
6137         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
6138                 setup->sync_method =
6139                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
6140                  IEEE80211_SYNC_METHOD_VENDOR :
6141                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
6142
6143         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
6144                 setup->path_sel_proto =
6145                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
6146                  IEEE80211_PATH_PROTOCOL_VENDOR :
6147                  IEEE80211_PATH_PROTOCOL_HWMP;
6148
6149         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
6150                 setup->path_metric =
6151                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
6152                  IEEE80211_PATH_METRIC_VENDOR :
6153                  IEEE80211_PATH_METRIC_AIRTIME;
6154
6155         if (tb[NL80211_MESH_SETUP_IE]) {
6156                 struct nlattr *ieattr =
6157                         tb[NL80211_MESH_SETUP_IE];
6158                 if (!is_valid_ie_attr(ieattr))
6159                         return -EINVAL;
6160                 setup->ie = nla_data(ieattr);
6161                 setup->ie_len = nla_len(ieattr);
6162         }
6163         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
6164             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
6165                 return -EINVAL;
6166         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
6167         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
6168         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
6169         if (setup->is_secure)
6170                 setup->user_mpm = true;
6171
6172         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
6173                 if (!setup->user_mpm)
6174                         return -EINVAL;
6175                 setup->auth_id =
6176                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
6177         }
6178
6179         return 0;
6180 }
6181
6182 static int nl80211_update_mesh_config(struct sk_buff *skb,
6183                                       struct genl_info *info)
6184 {
6185         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6186         struct net_device *dev = info->user_ptr[1];
6187         struct wireless_dev *wdev = dev->ieee80211_ptr;
6188         struct mesh_config cfg;
6189         u32 mask;
6190         int err;
6191
6192         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
6193                 return -EOPNOTSUPP;
6194
6195         if (!rdev->ops->update_mesh_config)
6196                 return -EOPNOTSUPP;
6197
6198         err = nl80211_parse_mesh_config(info, &cfg, &mask);
6199         if (err)
6200                 return err;
6201
6202         wdev_lock(wdev);
6203         if (!wdev->mesh_id_len)
6204                 err = -ENOLINK;
6205
6206         if (!err)
6207                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
6208
6209         wdev_unlock(wdev);
6210
6211         return err;
6212 }
6213
6214 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
6215                               struct sk_buff *msg)
6216 {
6217         struct nlattr *nl_reg_rules;
6218         unsigned int i;
6219
6220         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
6221             (regdom->dfs_region &&
6222              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
6223                 goto nla_put_failure;
6224
6225         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
6226         if (!nl_reg_rules)
6227                 goto nla_put_failure;
6228
6229         for (i = 0; i < regdom->n_reg_rules; i++) {
6230                 struct nlattr *nl_reg_rule;
6231                 const struct ieee80211_reg_rule *reg_rule;
6232                 const struct ieee80211_freq_range *freq_range;
6233                 const struct ieee80211_power_rule *power_rule;
6234                 unsigned int max_bandwidth_khz;
6235
6236                 reg_rule = &regdom->reg_rules[i];
6237                 freq_range = &reg_rule->freq_range;
6238                 power_rule = &reg_rule->power_rule;
6239
6240                 nl_reg_rule = nla_nest_start(msg, i);
6241                 if (!nl_reg_rule)
6242                         goto nla_put_failure;
6243
6244                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
6245                 if (!max_bandwidth_khz)
6246                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
6247                                                                   reg_rule);
6248
6249                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
6250                                 reg_rule->flags) ||
6251                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
6252                                 freq_range->start_freq_khz) ||
6253                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
6254                                 freq_range->end_freq_khz) ||
6255                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
6256                                 max_bandwidth_khz) ||
6257                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
6258                                 power_rule->max_antenna_gain) ||
6259                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
6260                                 power_rule->max_eirp) ||
6261                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
6262                                 reg_rule->dfs_cac_ms))
6263                         goto nla_put_failure;
6264
6265                 nla_nest_end(msg, nl_reg_rule);
6266         }
6267
6268         nla_nest_end(msg, nl_reg_rules);
6269         return 0;
6270
6271 nla_put_failure:
6272         return -EMSGSIZE;
6273 }
6274
6275 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
6276 {
6277         const struct ieee80211_regdomain *regdom = NULL;
6278         struct cfg80211_registered_device *rdev;
6279         struct wiphy *wiphy = NULL;
6280         struct sk_buff *msg;
6281         void *hdr;
6282
6283         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6284         if (!msg)
6285                 return -ENOBUFS;
6286
6287         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6288                              NL80211_CMD_GET_REG);
6289         if (!hdr)
6290                 goto put_failure;
6291
6292         if (info->attrs[NL80211_ATTR_WIPHY]) {
6293                 bool self_managed;
6294
6295                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6296                 if (IS_ERR(rdev)) {
6297                         nlmsg_free(msg);
6298                         return PTR_ERR(rdev);
6299                 }
6300
6301                 wiphy = &rdev->wiphy;
6302                 self_managed = wiphy->regulatory_flags &
6303                                REGULATORY_WIPHY_SELF_MANAGED;
6304                 regdom = get_wiphy_regdom(wiphy);
6305
6306                 /* a self-managed-reg device must have a private regdom */
6307                 if (WARN_ON(!regdom && self_managed)) {
6308                         nlmsg_free(msg);
6309                         return -EINVAL;
6310                 }
6311
6312                 if (regdom &&
6313                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6314                         goto nla_put_failure;
6315         }
6316
6317         if (!wiphy && reg_last_request_cell_base() &&
6318             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6319                         NL80211_USER_REG_HINT_CELL_BASE))
6320                 goto nla_put_failure;
6321
6322         rcu_read_lock();
6323
6324         if (!regdom)
6325                 regdom = rcu_dereference(cfg80211_regdomain);
6326
6327         if (nl80211_put_regdom(regdom, msg))
6328                 goto nla_put_failure_rcu;
6329
6330         rcu_read_unlock();
6331
6332         genlmsg_end(msg, hdr);
6333         return genlmsg_reply(msg, info);
6334
6335 nla_put_failure_rcu:
6336         rcu_read_unlock();
6337 nla_put_failure:
6338 put_failure:
6339         nlmsg_free(msg);
6340         return -EMSGSIZE;
6341 }
6342
6343 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
6344                                u32 seq, int flags, struct wiphy *wiphy,
6345                                const struct ieee80211_regdomain *regdom)
6346 {
6347         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6348                                    NL80211_CMD_GET_REG);
6349
6350         if (!hdr)
6351                 return -1;
6352
6353         genl_dump_check_consistent(cb, hdr);
6354
6355         if (nl80211_put_regdom(regdom, msg))
6356                 goto nla_put_failure;
6357
6358         if (!wiphy && reg_last_request_cell_base() &&
6359             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6360                         NL80211_USER_REG_HINT_CELL_BASE))
6361                 goto nla_put_failure;
6362
6363         if (wiphy &&
6364             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6365                 goto nla_put_failure;
6366
6367         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
6368             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
6369                 goto nla_put_failure;
6370
6371         genlmsg_end(msg, hdr);
6372         return 0;
6373
6374 nla_put_failure:
6375         genlmsg_cancel(msg, hdr);
6376         return -EMSGSIZE;
6377 }
6378
6379 static int nl80211_get_reg_dump(struct sk_buff *skb,
6380                                 struct netlink_callback *cb)
6381 {
6382         const struct ieee80211_regdomain *regdom = NULL;
6383         struct cfg80211_registered_device *rdev;
6384         int err, reg_idx, start = cb->args[2];
6385
6386         rtnl_lock();
6387
6388         if (cfg80211_regdomain && start == 0) {
6389                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6390                                           NLM_F_MULTI, NULL,
6391                                           rtnl_dereference(cfg80211_regdomain));
6392                 if (err < 0)
6393                         goto out_err;
6394         }
6395
6396         /* the global regdom is idx 0 */
6397         reg_idx = 1;
6398         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
6399                 regdom = get_wiphy_regdom(&rdev->wiphy);
6400                 if (!regdom)
6401                         continue;
6402
6403                 if (++reg_idx <= start)
6404                         continue;
6405
6406                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6407                                           NLM_F_MULTI, &rdev->wiphy, regdom);
6408                 if (err < 0) {
6409                         reg_idx--;
6410                         break;
6411                 }
6412         }
6413
6414         cb->args[2] = reg_idx;
6415         err = skb->len;
6416 out_err:
6417         rtnl_unlock();
6418         return err;
6419 }
6420
6421 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
6422 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
6423         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
6424         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
6425         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
6426         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
6427         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
6428         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
6429         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
6430 };
6431
6432 static int parse_reg_rule(struct nlattr *tb[],
6433         struct ieee80211_reg_rule *reg_rule)
6434 {
6435         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
6436         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
6437
6438         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
6439                 return -EINVAL;
6440         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
6441                 return -EINVAL;
6442         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
6443                 return -EINVAL;
6444         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
6445                 return -EINVAL;
6446         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
6447                 return -EINVAL;
6448
6449         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
6450
6451         freq_range->start_freq_khz =
6452                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
6453         freq_range->end_freq_khz =
6454                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
6455         freq_range->max_bandwidth_khz =
6456                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
6457
6458         power_rule->max_eirp =
6459                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
6460
6461         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
6462                 power_rule->max_antenna_gain =
6463                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
6464
6465         if (tb[NL80211_ATTR_DFS_CAC_TIME])
6466                 reg_rule->dfs_cac_ms =
6467                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
6468
6469         return 0;
6470 }
6471
6472 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
6473 {
6474         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
6475         struct nlattr *nl_reg_rule;
6476         char *alpha2;
6477         int rem_reg_rules, r;
6478         u32 num_rules = 0, rule_idx = 0, size_of_regd;
6479         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
6480         struct ieee80211_regdomain *rd;
6481
6482         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
6483                 return -EINVAL;
6484
6485         if (!info->attrs[NL80211_ATTR_REG_RULES])
6486                 return -EINVAL;
6487
6488         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
6489
6490         if (info->attrs[NL80211_ATTR_DFS_REGION])
6491                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
6492
6493         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6494                             rem_reg_rules) {
6495                 num_rules++;
6496                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
6497                         return -EINVAL;
6498         }
6499
6500         if (!reg_is_valid_request(alpha2))
6501                 return -EINVAL;
6502
6503         size_of_regd = sizeof(struct ieee80211_regdomain) +
6504                        num_rules * sizeof(struct ieee80211_reg_rule);
6505
6506         rd = kzalloc(size_of_regd, GFP_KERNEL);
6507         if (!rd)
6508                 return -ENOMEM;
6509
6510         rd->n_reg_rules = num_rules;
6511         rd->alpha2[0] = alpha2[0];
6512         rd->alpha2[1] = alpha2[1];
6513
6514         /*
6515          * Disable DFS master mode if the DFS region was
6516          * not supported or known on this kernel.
6517          */
6518         if (reg_supported_dfs_region(dfs_region))
6519                 rd->dfs_region = dfs_region;
6520
6521         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6522                             rem_reg_rules) {
6523                 r = nla_parse_nested(tb, NL80211_REG_RULE_ATTR_MAX,
6524                                      nl_reg_rule, reg_rule_policy,
6525                                      info->extack);
6526                 if (r)
6527                         goto bad_reg;
6528                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
6529                 if (r)
6530                         goto bad_reg;
6531
6532                 rule_idx++;
6533
6534                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
6535                         r = -EINVAL;
6536                         goto bad_reg;
6537                 }
6538         }
6539
6540         /* set_regdom takes ownership of rd */
6541         return set_regdom(rd, REGD_SOURCE_CRDA);
6542  bad_reg:
6543         kfree(rd);
6544         return r;
6545 }
6546 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
6547
6548 static int validate_scan_freqs(struct nlattr *freqs)
6549 {
6550         struct nlattr *attr1, *attr2;
6551         int n_channels = 0, tmp1, tmp2;
6552
6553         nla_for_each_nested(attr1, freqs, tmp1)
6554                 if (nla_len(attr1) != sizeof(u32))
6555                         return 0;
6556
6557         nla_for_each_nested(attr1, freqs, tmp1) {
6558                 n_channels++;
6559                 /*
6560                  * Some hardware has a limited channel list for
6561                  * scanning, and it is pretty much nonsensical
6562                  * to scan for a channel twice, so disallow that
6563                  * and don't require drivers to check that the
6564                  * channel list they get isn't longer than what
6565                  * they can scan, as long as they can scan all
6566                  * the channels they registered at once.
6567                  */
6568                 nla_for_each_nested(attr2, freqs, tmp2)
6569                         if (attr1 != attr2 &&
6570                             nla_get_u32(attr1) == nla_get_u32(attr2))
6571                                 return 0;
6572         }
6573
6574         return n_channels;
6575 }
6576
6577 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
6578 {
6579         return b < NUM_NL80211_BANDS && wiphy->bands[b];
6580 }
6581
6582 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
6583                             struct cfg80211_bss_selection *bss_select)
6584 {
6585         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
6586         struct nlattr *nest;
6587         int err;
6588         bool found = false;
6589         int i;
6590
6591         /* only process one nested attribute */
6592         nest = nla_data(nla);
6593         if (!nla_ok(nest, nla_len(nest)))
6594                 return -EINVAL;
6595
6596         err = nla_parse_nested(attr, NL80211_BSS_SELECT_ATTR_MAX, nest,
6597                                nl80211_bss_select_policy, NULL);
6598         if (err)
6599                 return err;
6600
6601         /* only one attribute may be given */
6602         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6603                 if (attr[i]) {
6604                         if (found)
6605                                 return -EINVAL;
6606                         found = true;
6607                 }
6608         }
6609
6610         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6611
6612         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6613                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6614
6615         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6616                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6617                 bss_select->param.band_pref =
6618                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6619                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6620                         return -EINVAL;
6621         }
6622
6623         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6624                 struct nl80211_bss_select_rssi_adjust *adj_param;
6625
6626                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6627                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6628                 bss_select->param.adjust.band = adj_param->band;
6629                 bss_select->param.adjust.delta = adj_param->delta;
6630                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6631                         return -EINVAL;
6632         }
6633
6634         /* user-space did not provide behaviour attribute */
6635         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6636                 return -EINVAL;
6637
6638         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6639                 return -EINVAL;
6640
6641         return 0;
6642 }
6643
6644 static int nl80211_parse_random_mac(struct nlattr **attrs,
6645                                     u8 *mac_addr, u8 *mac_addr_mask)
6646 {
6647         int i;
6648
6649         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6650                 eth_zero_addr(mac_addr);
6651                 eth_zero_addr(mac_addr_mask);
6652                 mac_addr[0] = 0x2;
6653                 mac_addr_mask[0] = 0x3;
6654
6655                 return 0;
6656         }
6657
6658         /* need both or none */
6659         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6660                 return -EINVAL;
6661
6662         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6663         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6664
6665         /* don't allow or configure an mcast address */
6666         if (!is_multicast_ether_addr(mac_addr_mask) ||
6667             is_multicast_ether_addr(mac_addr))
6668                 return -EINVAL;
6669
6670         /*
6671          * allow users to pass a MAC address that has bits set outside
6672          * of the mask, but don't bother drivers with having to deal
6673          * with such bits
6674          */
6675         for (i = 0; i < ETH_ALEN; i++)
6676                 mac_addr[i] &= mac_addr_mask[i];
6677
6678         return 0;
6679 }
6680
6681 static bool cfg80211_off_channel_oper_allowed(struct wireless_dev *wdev)
6682 {
6683         ASSERT_WDEV_LOCK(wdev);
6684
6685         if (!cfg80211_beaconing_iface_active(wdev))
6686                 return true;
6687
6688         if (!(wdev->chandef.chan->flags & IEEE80211_CHAN_RADAR))
6689                 return true;
6690
6691         return regulatory_pre_cac_allowed(wdev->wiphy);
6692 }
6693
6694 static int
6695 nl80211_check_scan_flags(struct wiphy *wiphy, struct wireless_dev *wdev,
6696                          void *request, struct nlattr **attrs,
6697                          bool is_sched_scan)
6698 {
6699         u8 *mac_addr, *mac_addr_mask;
6700         u32 *flags;
6701         enum nl80211_feature_flags randomness_flag;
6702
6703         if (!attrs[NL80211_ATTR_SCAN_FLAGS])
6704                 return 0;
6705
6706         if (is_sched_scan) {
6707                 struct cfg80211_sched_scan_request *req = request;
6708
6709                 randomness_flag = wdev ?
6710                                   NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR :
6711                                   NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6712                 flags = &req->flags;
6713                 mac_addr = req->mac_addr;
6714                 mac_addr_mask = req->mac_addr_mask;
6715         } else {
6716                 struct cfg80211_scan_request *req = request;
6717
6718                 randomness_flag = NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
6719                 flags = &req->flags;
6720                 mac_addr = req->mac_addr;
6721                 mac_addr_mask = req->mac_addr_mask;
6722         }
6723
6724         *flags = nla_get_u32(attrs[NL80211_ATTR_SCAN_FLAGS]);
6725
6726         if (((*flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6727              !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
6728             ((*flags & NL80211_SCAN_FLAG_LOW_SPAN) &&
6729              !wiphy_ext_feature_isset(wiphy,
6730                                       NL80211_EXT_FEATURE_LOW_SPAN_SCAN)) ||
6731             ((*flags & NL80211_SCAN_FLAG_LOW_POWER) &&
6732              !wiphy_ext_feature_isset(wiphy,
6733                                       NL80211_EXT_FEATURE_LOW_POWER_SCAN)) ||
6734             ((*flags & NL80211_SCAN_FLAG_HIGH_ACCURACY) &&
6735              !wiphy_ext_feature_isset(wiphy,
6736                                       NL80211_EXT_FEATURE_HIGH_ACCURACY_SCAN)))
6737                 return -EOPNOTSUPP;
6738
6739         if (*flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6740                 int err;
6741
6742                 if (!(wiphy->features & randomness_flag) ||
6743                     (wdev && wdev->current_bss))
6744                         return -EOPNOTSUPP;
6745
6746                 err = nl80211_parse_random_mac(attrs, mac_addr, mac_addr_mask);
6747                 if (err)
6748                         return err;
6749         }
6750
6751         if ((*flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME) &&
6752             !wiphy_ext_feature_isset(wiphy,
6753                                      NL80211_EXT_FEATURE_FILS_MAX_CHANNEL_TIME))
6754                 return -EOPNOTSUPP;
6755
6756         if ((*flags & NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP) &&
6757            !wiphy_ext_feature_isset(wiphy,
6758                                     NL80211_EXT_FEATURE_ACCEPT_BCAST_PROBE_RESP))
6759                 return -EOPNOTSUPP;
6760
6761         if ((*flags & NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
6762             !wiphy_ext_feature_isset(wiphy,
6763                                      NL80211_EXT_FEATURE_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION))
6764                 return -EOPNOTSUPP;
6765
6766         if ((*flags & NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE) &&
6767             !wiphy_ext_feature_isset(wiphy,
6768                                      NL80211_EXT_FEATURE_OCE_PROBE_REQ_HIGH_TX_RATE))
6769                 return -EOPNOTSUPP;
6770
6771         return 0;
6772 }
6773
6774 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6775 {
6776         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6777         struct wireless_dev *wdev = info->user_ptr[1];
6778         struct cfg80211_scan_request *request;
6779         struct nlattr *attr;
6780         struct wiphy *wiphy;
6781         int err, tmp, n_ssids = 0, n_channels, i;
6782         size_t ie_len;
6783
6784         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6785                 return -EINVAL;
6786
6787         wiphy = &rdev->wiphy;
6788
6789         if (wdev->iftype == NL80211_IFTYPE_NAN)
6790                 return -EOPNOTSUPP;
6791
6792         if (!rdev->ops->scan)
6793                 return -EOPNOTSUPP;
6794
6795         if (rdev->scan_req || rdev->scan_msg) {
6796                 err = -EBUSY;
6797                 goto unlock;
6798         }
6799
6800         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6801                 n_channels = validate_scan_freqs(
6802                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6803                 if (!n_channels) {
6804                         err = -EINVAL;
6805                         goto unlock;
6806                 }
6807         } else {
6808                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6809         }
6810
6811         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6812                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6813                         n_ssids++;
6814
6815         if (n_ssids > wiphy->max_scan_ssids) {
6816                 err = -EINVAL;
6817                 goto unlock;
6818         }
6819
6820         if (info->attrs[NL80211_ATTR_IE])
6821                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6822         else
6823                 ie_len = 0;
6824
6825         if (ie_len > wiphy->max_scan_ie_len) {
6826                 err = -EINVAL;
6827                 goto unlock;
6828         }
6829
6830         request = kzalloc(sizeof(*request)
6831                         + sizeof(*request->ssids) * n_ssids
6832                         + sizeof(*request->channels) * n_channels
6833                         + ie_len, GFP_KERNEL);
6834         if (!request) {
6835                 err = -ENOMEM;
6836                 goto unlock;
6837         }
6838
6839         if (n_ssids)
6840                 request->ssids = (void *)&request->channels[n_channels];
6841         request->n_ssids = n_ssids;
6842         if (ie_len) {
6843                 if (n_ssids)
6844                         request->ie = (void *)(request->ssids + n_ssids);
6845                 else
6846                         request->ie = (void *)(request->channels + n_channels);
6847         }
6848
6849         i = 0;
6850         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6851                 /* user specified, bail out if channel not found */
6852                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6853                         struct ieee80211_channel *chan;
6854
6855                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6856
6857                         if (!chan) {
6858                                 err = -EINVAL;
6859                                 goto out_free;
6860                         }
6861
6862                         /* ignore disabled channels */
6863                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6864                                 continue;
6865
6866                         request->channels[i] = chan;
6867                         i++;
6868                 }
6869         } else {
6870                 enum nl80211_band band;
6871
6872                 /* all channels */
6873                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6874                         int j;
6875
6876                         if (!wiphy->bands[band])
6877                                 continue;
6878                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6879                                 struct ieee80211_channel *chan;
6880
6881                                 chan = &wiphy->bands[band]->channels[j];
6882
6883                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6884                                         continue;
6885
6886                                 request->channels[i] = chan;
6887                                 i++;
6888                         }
6889                 }
6890         }
6891
6892         if (!i) {
6893                 err = -EINVAL;
6894                 goto out_free;
6895         }
6896
6897         request->n_channels = i;
6898
6899         wdev_lock(wdev);
6900         if (!cfg80211_off_channel_oper_allowed(wdev)) {
6901                 struct ieee80211_channel *chan;
6902
6903                 if (request->n_channels != 1) {
6904                         wdev_unlock(wdev);
6905                         err = -EBUSY;
6906                         goto out_free;
6907                 }
6908
6909                 chan = request->channels[0];
6910                 if (chan->center_freq != wdev->chandef.chan->center_freq) {
6911                         wdev_unlock(wdev);
6912                         err = -EBUSY;
6913                         goto out_free;
6914                 }
6915         }
6916         wdev_unlock(wdev);
6917
6918         i = 0;
6919         if (n_ssids) {
6920                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6921                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6922                                 err = -EINVAL;
6923                                 goto out_free;
6924                         }
6925                         request->ssids[i].ssid_len = nla_len(attr);
6926                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6927                         i++;
6928                 }
6929         }
6930
6931         if (info->attrs[NL80211_ATTR_IE]) {
6932                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6933                 memcpy((void *)request->ie,
6934                        nla_data(info->attrs[NL80211_ATTR_IE]),
6935                        request->ie_len);
6936         }
6937
6938         for (i = 0; i < NUM_NL80211_BANDS; i++)
6939                 if (wiphy->bands[i])
6940                         request->rates[i] =
6941                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6942
6943         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6944                 nla_for_each_nested(attr,
6945                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6946                                     tmp) {
6947                         enum nl80211_band band = nla_type(attr);
6948
6949                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6950                                 err = -EINVAL;
6951                                 goto out_free;
6952                         }
6953
6954                         if (!wiphy->bands[band])
6955                                 continue;
6956
6957                         err = ieee80211_get_ratemask(wiphy->bands[band],
6958                                                      nla_data(attr),
6959                                                      nla_len(attr),
6960                                                      &request->rates[band]);
6961                         if (err)
6962                                 goto out_free;
6963                 }
6964         }
6965
6966         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6967                 if (!wiphy_ext_feature_isset(wiphy,
6968                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6969                         err = -EOPNOTSUPP;
6970                         goto out_free;
6971                 }
6972
6973                 request->duration =
6974                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6975                 request->duration_mandatory =
6976                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6977         }
6978
6979         err = nl80211_check_scan_flags(wiphy, wdev, request, info->attrs,
6980                                        false);
6981         if (err)
6982                 goto out_free;
6983
6984         request->no_cck =
6985                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6986
6987         /* Initial implementation used NL80211_ATTR_MAC to set the specific
6988          * BSSID to scan for. This was problematic because that same attribute
6989          * was already used for another purpose (local random MAC address). The
6990          * NL80211_ATTR_BSSID attribute was added to fix this. For backwards
6991          * compatibility with older userspace components, also use the
6992          * NL80211_ATTR_MAC value here if it can be determined to be used for
6993          * the specific BSSID use case instead of the random MAC address
6994          * (NL80211_ATTR_SCAN_FLAGS is used to enable random MAC address use).
6995          */
6996         if (info->attrs[NL80211_ATTR_BSSID])
6997                 memcpy(request->bssid,
6998                        nla_data(info->attrs[NL80211_ATTR_BSSID]), ETH_ALEN);
6999         else if (!(request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) &&
7000                  info->attrs[NL80211_ATTR_MAC])
7001                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
7002                        ETH_ALEN);
7003         else
7004                 eth_broadcast_addr(request->bssid);
7005
7006         request->wdev = wdev;
7007         request->wiphy = &rdev->wiphy;
7008         request->scan_start = jiffies;
7009
7010         rdev->scan_req = request;
7011         err = rdev_scan(rdev, request);
7012
7013         if (!err) {
7014                 nl80211_send_scan_start(rdev, wdev);
7015                 if (wdev->netdev)
7016                         dev_hold(wdev->netdev);
7017         } else {
7018  out_free:
7019                 rdev->scan_req = NULL;
7020                 kfree(request);
7021         }
7022
7023  unlock:
7024         return err;
7025 }
7026
7027 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
7028 {
7029         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7030         struct wireless_dev *wdev = info->user_ptr[1];
7031
7032         if (!rdev->ops->abort_scan)
7033                 return -EOPNOTSUPP;
7034
7035         if (rdev->scan_msg)
7036                 return 0;
7037
7038         if (!rdev->scan_req)
7039                 return -ENOENT;
7040
7041         rdev_abort_scan(rdev, wdev);
7042         return 0;
7043 }
7044
7045 static int
7046 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
7047                                struct cfg80211_sched_scan_request *request,
7048                                struct nlattr **attrs)
7049 {
7050         int tmp, err, i = 0;
7051         struct nlattr *attr;
7052
7053         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
7054                 u32 interval;
7055
7056                 /*
7057                  * If scan plans are not specified,
7058                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL will be specified. In this
7059                  * case one scan plan will be set with the specified scan
7060                  * interval and infinite number of iterations.
7061                  */
7062                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
7063                 if (!interval)
7064                         return -EINVAL;
7065
7066                 request->scan_plans[0].interval =
7067                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
7068                 if (!request->scan_plans[0].interval)
7069                         return -EINVAL;
7070
7071                 if (request->scan_plans[0].interval >
7072                     wiphy->max_sched_scan_plan_interval)
7073                         request->scan_plans[0].interval =
7074                                 wiphy->max_sched_scan_plan_interval;
7075
7076                 return 0;
7077         }
7078
7079         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
7080                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
7081
7082                 if (WARN_ON(i >= n_plans))
7083                         return -EINVAL;
7084
7085                 err = nla_parse_nested(plan, NL80211_SCHED_SCAN_PLAN_MAX,
7086                                        attr, nl80211_plan_policy, NULL);
7087                 if (err)
7088                         return err;
7089
7090                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
7091                         return -EINVAL;
7092
7093                 request->scan_plans[i].interval =
7094                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
7095                 if (!request->scan_plans[i].interval ||
7096                     request->scan_plans[i].interval >
7097                     wiphy->max_sched_scan_plan_interval)
7098                         return -EINVAL;
7099
7100                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
7101                         request->scan_plans[i].iterations =
7102                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
7103                         if (!request->scan_plans[i].iterations ||
7104                             (request->scan_plans[i].iterations >
7105                              wiphy->max_sched_scan_plan_iterations))
7106                                 return -EINVAL;
7107                 } else if (i < n_plans - 1) {
7108                         /*
7109                          * All scan plans but the last one must specify
7110                          * a finite number of iterations
7111                          */
7112                         return -EINVAL;
7113                 }
7114
7115                 i++;
7116         }
7117
7118         /*
7119          * The last scan plan must not specify the number of
7120          * iterations, it is supposed to run infinitely
7121          */
7122         if (request->scan_plans[n_plans - 1].iterations)
7123                 return  -EINVAL;
7124
7125         return 0;
7126 }
7127
7128 static struct cfg80211_sched_scan_request *
7129 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
7130                          struct nlattr **attrs, int max_match_sets)
7131 {
7132         struct cfg80211_sched_scan_request *request;
7133         struct nlattr *attr;
7134         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
7135         enum nl80211_band band;
7136         size_t ie_len;
7137         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
7138         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
7139
7140         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
7141                 return ERR_PTR(-EINVAL);
7142
7143         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
7144                 n_channels = validate_scan_freqs(
7145                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
7146                 if (!n_channels)
7147                         return ERR_PTR(-EINVAL);
7148         } else {
7149                 n_channels = ieee80211_get_num_supported_channels(wiphy);
7150         }
7151
7152         if (attrs[NL80211_ATTR_SCAN_SSIDS])
7153                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
7154                                     tmp)
7155                         n_ssids++;
7156
7157         if (n_ssids > wiphy->max_sched_scan_ssids)
7158                 return ERR_PTR(-EINVAL);
7159
7160         /*
7161          * First, count the number of 'real' matchsets. Due to an issue with
7162          * the old implementation, matchsets containing only the RSSI attribute
7163          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
7164          * RSSI for all matchsets, rather than their own matchset for reporting
7165          * all APs with a strong RSSI. This is needed to be compatible with
7166          * older userspace that treated a matchset with only the RSSI as the
7167          * global RSSI for all other matchsets - if there are other matchsets.
7168          */
7169         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
7170                 nla_for_each_nested(attr,
7171                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
7172                                     tmp) {
7173                         struct nlattr *rssi;
7174
7175                         err = nla_parse_nested(tb,
7176                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
7177                                                attr, nl80211_match_policy,
7178                                                NULL);
7179                         if (err)
7180                                 return ERR_PTR(err);
7181
7182                         /* SSID and BSSID are mutually exclusive */
7183                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] &&
7184                             tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID])
7185                                 return ERR_PTR(-EINVAL);
7186
7187                         /* add other standalone attributes here */
7188                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] ||
7189                             tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID]) {
7190                                 n_match_sets++;
7191                                 continue;
7192                         }
7193                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7194                         if (rssi)
7195                                 default_match_rssi = nla_get_s32(rssi);
7196                 }
7197         }
7198
7199         /* However, if there's no other matchset, add the RSSI one */
7200         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
7201                 n_match_sets = 1;
7202
7203         if (n_match_sets > max_match_sets)
7204                 return ERR_PTR(-EINVAL);
7205
7206         if (attrs[NL80211_ATTR_IE])
7207                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
7208         else
7209                 ie_len = 0;
7210
7211         if (ie_len > wiphy->max_sched_scan_ie_len)
7212                 return ERR_PTR(-EINVAL);
7213
7214         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
7215                 /*
7216                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
7217                  * each scan plan already specifies its own interval
7218                  */
7219                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
7220                         return ERR_PTR(-EINVAL);
7221
7222                 nla_for_each_nested(attr,
7223                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
7224                         n_plans++;
7225         } else {
7226                 /*
7227                  * The scan interval attribute is kept for backward
7228                  * compatibility. If no scan plans are specified and sched scan
7229                  * interval is specified, one scan plan will be set with this
7230                  * scan interval and infinite number of iterations.
7231                  */
7232                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
7233                         return ERR_PTR(-EINVAL);
7234
7235                 n_plans = 1;
7236         }
7237
7238         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
7239                 return ERR_PTR(-EINVAL);
7240
7241         if (!wiphy_ext_feature_isset(
7242                     wiphy, NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI) &&
7243             (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] ||
7244              attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]))
7245                 return ERR_PTR(-EINVAL);
7246
7247         request = kzalloc(sizeof(*request)
7248                         + sizeof(*request->ssids) * n_ssids
7249                         + sizeof(*request->match_sets) * n_match_sets
7250                         + sizeof(*request->scan_plans) * n_plans
7251                         + sizeof(*request->channels) * n_channels
7252                         + ie_len, GFP_KERNEL);
7253         if (!request)
7254                 return ERR_PTR(-ENOMEM);
7255
7256         if (n_ssids)
7257                 request->ssids = (void *)&request->channels[n_channels];
7258         request->n_ssids = n_ssids;
7259         if (ie_len) {
7260                 if (n_ssids)
7261                         request->ie = (void *)(request->ssids + n_ssids);
7262                 else
7263                         request->ie = (void *)(request->channels + n_channels);
7264         }
7265
7266         if (n_match_sets) {
7267                 if (request->ie)
7268                         request->match_sets = (void *)(request->ie + ie_len);
7269                 else if (n_ssids)
7270                         request->match_sets =
7271                                 (void *)(request->ssids + n_ssids);
7272                 else
7273                         request->match_sets =
7274                                 (void *)(request->channels + n_channels);
7275         }
7276         request->n_match_sets = n_match_sets;
7277
7278         if (n_match_sets)
7279                 request->scan_plans = (void *)(request->match_sets +
7280                                                n_match_sets);
7281         else if (request->ie)
7282                 request->scan_plans = (void *)(request->ie + ie_len);
7283         else if (n_ssids)
7284                 request->scan_plans = (void *)(request->ssids + n_ssids);
7285         else
7286                 request->scan_plans = (void *)(request->channels + n_channels);
7287
7288         request->n_scan_plans = n_plans;
7289
7290         i = 0;
7291         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
7292                 /* user specified, bail out if channel not found */
7293                 nla_for_each_nested(attr,
7294                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
7295                                     tmp) {
7296                         struct ieee80211_channel *chan;
7297
7298                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
7299
7300                         if (!chan) {
7301                                 err = -EINVAL;
7302                                 goto out_free;
7303                         }
7304
7305                         /* ignore disabled channels */
7306                         if (chan->flags & IEEE80211_CHAN_DISABLED)
7307                                 continue;
7308
7309                         request->channels[i] = chan;
7310                         i++;
7311                 }
7312         } else {
7313                 /* all channels */
7314                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
7315                         int j;
7316
7317                         if (!wiphy->bands[band])
7318                                 continue;
7319                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
7320                                 struct ieee80211_channel *chan;
7321
7322                                 chan = &wiphy->bands[band]->channels[j];
7323
7324                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
7325                                         continue;
7326
7327                                 request->channels[i] = chan;
7328                                 i++;
7329                         }
7330                 }
7331         }
7332
7333         if (!i) {
7334                 err = -EINVAL;
7335                 goto out_free;
7336         }
7337
7338         request->n_channels = i;
7339
7340         i = 0;
7341         if (n_ssids) {
7342                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
7343                                     tmp) {
7344                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
7345                                 err = -EINVAL;
7346                                 goto out_free;
7347                         }
7348                         request->ssids[i].ssid_len = nla_len(attr);
7349                         memcpy(request->ssids[i].ssid, nla_data(attr),
7350                                nla_len(attr));
7351                         i++;
7352                 }
7353         }
7354
7355         i = 0;
7356         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
7357                 nla_for_each_nested(attr,
7358                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
7359                                     tmp) {
7360                         struct nlattr *ssid, *bssid, *rssi;
7361
7362                         err = nla_parse_nested(tb,
7363                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
7364                                                attr, nl80211_match_policy,
7365                                                NULL);
7366                         if (err)
7367                                 goto out_free;
7368                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
7369                         bssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID];
7370                         if (ssid || bssid) {
7371                                 if (WARN_ON(i >= n_match_sets)) {
7372                                         /* this indicates a programming error,
7373                                          * the loop above should have verified
7374                                          * things properly
7375                                          */
7376                                         err = -EINVAL;
7377                                         goto out_free;
7378                                 }
7379
7380                                 if (ssid) {
7381                                         if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
7382                                                 err = -EINVAL;
7383                                                 goto out_free;
7384                                         }
7385                                         memcpy(request->match_sets[i].ssid.ssid,
7386                                                nla_data(ssid), nla_len(ssid));
7387                                         request->match_sets[i].ssid.ssid_len =
7388                                                 nla_len(ssid);
7389                                 }
7390                                 if (bssid) {
7391                                         if (nla_len(bssid) != ETH_ALEN) {
7392                                                 err = -EINVAL;
7393                                                 goto out_free;
7394                                         }
7395                                         memcpy(request->match_sets[i].bssid,
7396                                                nla_data(bssid), ETH_ALEN);
7397                                 }
7398
7399                                 /* special attribute - old implementation w/a */
7400                                 request->match_sets[i].rssi_thold =
7401                                         default_match_rssi;
7402                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7403                                 if (rssi)
7404                                         request->match_sets[i].rssi_thold =
7405                                                 nla_get_s32(rssi);
7406                         }
7407                         i++;
7408                 }
7409
7410                 /* there was no other matchset, so the RSSI one is alone */
7411                 if (i == 0 && n_match_sets)
7412                         request->match_sets[0].rssi_thold = default_match_rssi;
7413
7414                 request->min_rssi_thold = INT_MAX;
7415                 for (i = 0; i < n_match_sets; i++)
7416                         request->min_rssi_thold =
7417                                 min(request->match_sets[i].rssi_thold,
7418                                     request->min_rssi_thold);
7419         } else {
7420                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
7421         }
7422
7423         if (ie_len) {
7424                 request->ie_len = ie_len;
7425                 memcpy((void *)request->ie,
7426                        nla_data(attrs[NL80211_ATTR_IE]),
7427                        request->ie_len);
7428         }
7429
7430         err = nl80211_check_scan_flags(wiphy, wdev, request, attrs, true);
7431         if (err)
7432                 goto out_free;
7433
7434         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
7435                 request->delay =
7436                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
7437
7438         if (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]) {
7439                 request->relative_rssi = nla_get_s8(
7440                         attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]);
7441                 request->relative_rssi_set = true;
7442         }
7443
7444         if (request->relative_rssi_set &&
7445             attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]) {
7446                 struct nl80211_bss_select_rssi_adjust *rssi_adjust;
7447
7448                 rssi_adjust = nla_data(
7449                         attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]);
7450                 request->rssi_adjust.band = rssi_adjust->band;
7451                 request->rssi_adjust.delta = rssi_adjust->delta;
7452                 if (!is_band_valid(wiphy, request->rssi_adjust.band)) {
7453                         err = -EINVAL;
7454                         goto out_free;
7455                 }
7456         }
7457
7458         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
7459         if (err)
7460                 goto out_free;
7461
7462         request->scan_start = jiffies;
7463
7464         return request;
7465
7466 out_free:
7467         kfree(request);
7468         return ERR_PTR(err);
7469 }
7470
7471 static int nl80211_start_sched_scan(struct sk_buff *skb,
7472                                     struct genl_info *info)
7473 {
7474         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7475         struct net_device *dev = info->user_ptr[1];
7476         struct wireless_dev *wdev = dev->ieee80211_ptr;
7477         struct cfg80211_sched_scan_request *sched_scan_req;
7478         bool want_multi;
7479         int err;
7480
7481         if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_start)
7482                 return -EOPNOTSUPP;
7483
7484         want_multi = info->attrs[NL80211_ATTR_SCHED_SCAN_MULTI];
7485         err = cfg80211_sched_scan_req_possible(rdev, want_multi);
7486         if (err)
7487                 return err;
7488
7489         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
7490                                                   info->attrs,
7491                                                   rdev->wiphy.max_match_sets);
7492
7493         err = PTR_ERR_OR_ZERO(sched_scan_req);
7494         if (err)
7495                 goto out_err;
7496
7497         /* leave request id zero for legacy request
7498          * or if driver does not support multi-scheduled scan
7499          */
7500         if (want_multi && rdev->wiphy.max_sched_scan_reqs > 1) {
7501                 while (!sched_scan_req->reqid)
7502                         sched_scan_req->reqid = rdev->wiphy.cookie_counter++;
7503         }
7504
7505         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
7506         if (err)
7507                 goto out_free;
7508
7509         sched_scan_req->dev = dev;
7510         sched_scan_req->wiphy = &rdev->wiphy;
7511
7512         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
7513                 sched_scan_req->owner_nlportid = info->snd_portid;
7514
7515         cfg80211_add_sched_scan_req(rdev, sched_scan_req);
7516
7517         nl80211_send_sched_scan(sched_scan_req, NL80211_CMD_START_SCHED_SCAN);
7518         return 0;
7519
7520 out_free:
7521         kfree(sched_scan_req);
7522 out_err:
7523         return err;
7524 }
7525
7526 static int nl80211_stop_sched_scan(struct sk_buff *skb,
7527                                    struct genl_info *info)
7528 {
7529         struct cfg80211_sched_scan_request *req;
7530         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7531         u64 cookie;
7532
7533         if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_stop)
7534                 return -EOPNOTSUPP;
7535
7536         if (info->attrs[NL80211_ATTR_COOKIE]) {
7537                 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7538                 return __cfg80211_stop_sched_scan(rdev, cookie, false);
7539         }
7540
7541         req = list_first_or_null_rcu(&rdev->sched_scan_req_list,
7542                                      struct cfg80211_sched_scan_request,
7543                                      list);
7544         if (!req || req->reqid ||
7545             (req->owner_nlportid &&
7546              req->owner_nlportid != info->snd_portid))
7547                 return -ENOENT;
7548
7549         return cfg80211_stop_sched_scan_req(rdev, req, false);
7550 }
7551
7552 static int nl80211_start_radar_detection(struct sk_buff *skb,
7553                                          struct genl_info *info)
7554 {
7555         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7556         struct net_device *dev = info->user_ptr[1];
7557         struct wireless_dev *wdev = dev->ieee80211_ptr;
7558         struct wiphy *wiphy = wdev->wiphy;
7559         struct cfg80211_chan_def chandef;
7560         enum nl80211_dfs_regions dfs_region;
7561         unsigned int cac_time_ms;
7562         int err;
7563
7564         dfs_region = reg_get_dfs_region(wiphy);
7565         if (dfs_region == NL80211_DFS_UNSET)
7566                 return -EINVAL;
7567
7568         err = nl80211_parse_chandef(rdev, info, &chandef);
7569         if (err)
7570                 return err;
7571
7572         if (netif_carrier_ok(dev))
7573                 return -EBUSY;
7574
7575         if (wdev->cac_started)
7576                 return -EBUSY;
7577
7578         err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
7579         if (err < 0)
7580                 return err;
7581
7582         if (err == 0)
7583                 return -EINVAL;
7584
7585         if (!cfg80211_chandef_dfs_usable(wiphy, &chandef))
7586                 return -EINVAL;
7587
7588         /* CAC start is offloaded to HW and can't be started manually */
7589         if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD))
7590                 return -EOPNOTSUPP;
7591
7592         if (!rdev->ops->start_radar_detection)
7593                 return -EOPNOTSUPP;
7594
7595         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
7596         if (WARN_ON(!cac_time_ms))
7597                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
7598
7599         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
7600         if (!err) {
7601                 wdev->chandef = chandef;
7602                 wdev->cac_started = true;
7603                 wdev->cac_start_time = jiffies;
7604                 wdev->cac_time_ms = cac_time_ms;
7605         }
7606         return err;
7607 }
7608
7609 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
7610 {
7611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7612         struct net_device *dev = info->user_ptr[1];
7613         struct wireless_dev *wdev = dev->ieee80211_ptr;
7614         struct cfg80211_csa_settings params;
7615         /* csa_attrs is defined static to avoid waste of stack size - this
7616          * function is called under RTNL lock, so this should not be a problem.
7617          */
7618         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
7619         int err;
7620         bool need_new_beacon = false;
7621         bool need_handle_dfs_flag = true;
7622         int len, i;
7623         u32 cs_count;
7624
7625         if (!rdev->ops->channel_switch ||
7626             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
7627                 return -EOPNOTSUPP;
7628
7629         switch (dev->ieee80211_ptr->iftype) {
7630         case NL80211_IFTYPE_AP:
7631         case NL80211_IFTYPE_P2P_GO:
7632                 need_new_beacon = true;
7633                 /* For all modes except AP the handle_dfs flag needs to be
7634                  * supplied to tell the kernel that userspace will handle radar
7635                  * events when they happen. Otherwise a switch to a channel
7636                  * requiring DFS will be rejected.
7637                  */
7638                 need_handle_dfs_flag = false;
7639
7640                 /* useless if AP is not running */
7641                 if (!wdev->beacon_interval)
7642                         return -ENOTCONN;
7643                 break;
7644         case NL80211_IFTYPE_ADHOC:
7645                 if (!wdev->ssid_len)
7646                         return -ENOTCONN;
7647                 break;
7648         case NL80211_IFTYPE_MESH_POINT:
7649                 if (!wdev->mesh_id_len)
7650                         return -ENOTCONN;
7651                 break;
7652         default:
7653                 return -EOPNOTSUPP;
7654         }
7655
7656         memset(&params, 0, sizeof(params));
7657
7658         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7659             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
7660                 return -EINVAL;
7661
7662         /* only important for AP, IBSS and mesh create IEs internally */
7663         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
7664                 return -EINVAL;
7665
7666         /* Even though the attribute is u32, the specification says
7667          * u8, so let's make sure we don't overflow.
7668          */
7669         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
7670         if (cs_count > 255)
7671                 return -EINVAL;
7672
7673         params.count = cs_count;
7674
7675         if (!need_new_beacon)
7676                 goto skip_beacons;
7677
7678         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
7679         if (err)
7680                 return err;
7681
7682         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
7683                                info->attrs[NL80211_ATTR_CSA_IES],
7684                                nl80211_policy, info->extack);
7685         if (err)
7686                 return err;
7687
7688         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
7689         if (err)
7690                 return err;
7691
7692         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
7693                 return -EINVAL;
7694
7695         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7696         if (!len || (len % sizeof(u16)))
7697                 return -EINVAL;
7698
7699         params.n_counter_offsets_beacon = len / sizeof(u16);
7700         if (rdev->wiphy.max_num_csa_counters &&
7701             (params.n_counter_offsets_beacon >
7702              rdev->wiphy.max_num_csa_counters))
7703                 return -EINVAL;
7704
7705         params.counter_offsets_beacon =
7706                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7707
7708         /* sanity checks - counters should fit and be the same */
7709         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
7710                 u16 offset = params.counter_offsets_beacon[i];
7711
7712                 if (offset >= params.beacon_csa.tail_len)
7713                         return -EINVAL;
7714
7715                 if (params.beacon_csa.tail[offset] != params.count)
7716                         return -EINVAL;
7717         }
7718
7719         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
7720                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7721                 if (!len || (len % sizeof(u16)))
7722                         return -EINVAL;
7723
7724                 params.n_counter_offsets_presp = len / sizeof(u16);
7725                 if (rdev->wiphy.max_num_csa_counters &&
7726                     (params.n_counter_offsets_presp >
7727                      rdev->wiphy.max_num_csa_counters))
7728                         return -EINVAL;
7729
7730                 params.counter_offsets_presp =
7731                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7732
7733                 /* sanity checks - counters should fit and be the same */
7734                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
7735                         u16 offset = params.counter_offsets_presp[i];
7736
7737                         if (offset >= params.beacon_csa.probe_resp_len)
7738                                 return -EINVAL;
7739
7740                         if (params.beacon_csa.probe_resp[offset] !=
7741                             params.count)
7742                                 return -EINVAL;
7743                 }
7744         }
7745
7746 skip_beacons:
7747         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7748         if (err)
7749                 return err;
7750
7751         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7752                                            wdev->iftype))
7753                 return -EINVAL;
7754
7755         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7756                                             &params.chandef,
7757                                             wdev->iftype);
7758         if (err < 0)
7759                 return err;
7760
7761         if (err > 0) {
7762                 params.radar_required = true;
7763                 if (need_handle_dfs_flag &&
7764                     !nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS])) {
7765                         return -EINVAL;
7766                 }
7767         }
7768
7769         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7770                 params.block_tx = true;
7771
7772         wdev_lock(wdev);
7773         err = rdev_channel_switch(rdev, dev, &params);
7774         wdev_unlock(wdev);
7775
7776         return err;
7777 }
7778
7779 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7780                             u32 seq, int flags,
7781                             struct cfg80211_registered_device *rdev,
7782                             struct wireless_dev *wdev,
7783                             struct cfg80211_internal_bss *intbss)
7784 {
7785         struct cfg80211_bss *res = &intbss->pub;
7786         const struct cfg80211_bss_ies *ies;
7787         void *hdr;
7788         struct nlattr *bss;
7789
7790         ASSERT_WDEV_LOCK(wdev);
7791
7792         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7793                              NL80211_CMD_NEW_SCAN_RESULTS);
7794         if (!hdr)
7795                 return -1;
7796
7797         genl_dump_check_consistent(cb, hdr);
7798
7799         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7800                 goto nla_put_failure;
7801         if (wdev->netdev &&
7802             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7803                 goto nla_put_failure;
7804         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7805                               NL80211_ATTR_PAD))
7806                 goto nla_put_failure;
7807
7808         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7809         if (!bss)
7810                 goto nla_put_failure;
7811         if ((!is_zero_ether_addr(res->bssid) &&
7812              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7813                 goto nla_put_failure;
7814
7815         rcu_read_lock();
7816         /* indicate whether we have probe response data or not */
7817         if (rcu_access_pointer(res->proberesp_ies) &&
7818             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7819                 goto fail_unlock_rcu;
7820
7821         /* this pointer prefers to be pointed to probe response data
7822          * but is always valid
7823          */
7824         ies = rcu_dereference(res->ies);
7825         if (ies) {
7826                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7827                                       NL80211_BSS_PAD))
7828                         goto fail_unlock_rcu;
7829                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7830                                         ies->len, ies->data))
7831                         goto fail_unlock_rcu;
7832         }
7833
7834         /* and this pointer is always (unless driver didn't know) beacon data */
7835         ies = rcu_dereference(res->beacon_ies);
7836         if (ies && ies->from_beacon) {
7837                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7838                                       NL80211_BSS_PAD))
7839                         goto fail_unlock_rcu;
7840                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7841                                         ies->len, ies->data))
7842                         goto fail_unlock_rcu;
7843         }
7844         rcu_read_unlock();
7845
7846         if (res->beacon_interval &&
7847             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7848                 goto nla_put_failure;
7849         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7850             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7851             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7852             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7853                         jiffies_to_msecs(jiffies - intbss->ts)))
7854                 goto nla_put_failure;
7855
7856         if (intbss->parent_tsf &&
7857             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7858                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7859              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7860                      intbss->parent_bssid)))
7861                 goto nla_put_failure;
7862
7863         if (intbss->ts_boottime &&
7864             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7865                               intbss->ts_boottime, NL80211_BSS_PAD))
7866                 goto nla_put_failure;
7867
7868         if (!nl80211_put_signal(msg, intbss->pub.chains,
7869                                 intbss->pub.chain_signal,
7870                                 NL80211_BSS_CHAIN_SIGNAL))
7871                 goto nla_put_failure;
7872
7873         switch (rdev->wiphy.signal_type) {
7874         case CFG80211_SIGNAL_TYPE_MBM:
7875                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7876                         goto nla_put_failure;
7877                 break;
7878         case CFG80211_SIGNAL_TYPE_UNSPEC:
7879                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7880                         goto nla_put_failure;
7881                 break;
7882         default:
7883                 break;
7884         }
7885
7886         switch (wdev->iftype) {
7887         case NL80211_IFTYPE_P2P_CLIENT:
7888         case NL80211_IFTYPE_STATION:
7889                 if (intbss == wdev->current_bss &&
7890                     nla_put_u32(msg, NL80211_BSS_STATUS,
7891                                 NL80211_BSS_STATUS_ASSOCIATED))
7892                         goto nla_put_failure;
7893                 break;
7894         case NL80211_IFTYPE_ADHOC:
7895                 if (intbss == wdev->current_bss &&
7896                     nla_put_u32(msg, NL80211_BSS_STATUS,
7897                                 NL80211_BSS_STATUS_IBSS_JOINED))
7898                         goto nla_put_failure;
7899                 break;
7900         default:
7901                 break;
7902         }
7903
7904         nla_nest_end(msg, bss);
7905
7906         genlmsg_end(msg, hdr);
7907         return 0;
7908
7909  fail_unlock_rcu:
7910         rcu_read_unlock();
7911  nla_put_failure:
7912         genlmsg_cancel(msg, hdr);
7913         return -EMSGSIZE;
7914 }
7915
7916 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7917 {
7918         struct cfg80211_registered_device *rdev;
7919         struct cfg80211_internal_bss *scan;
7920         struct wireless_dev *wdev;
7921         int start = cb->args[2], idx = 0;
7922         int err;
7923
7924         rtnl_lock();
7925         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7926         if (err) {
7927                 rtnl_unlock();
7928                 return err;
7929         }
7930
7931         wdev_lock(wdev);
7932         spin_lock_bh(&rdev->bss_lock);
7933         cfg80211_bss_expire(rdev);
7934
7935         cb->seq = rdev->bss_generation;
7936
7937         list_for_each_entry(scan, &rdev->bss_list, list) {
7938                 if (++idx <= start)
7939                         continue;
7940                 if (nl80211_send_bss(skb, cb,
7941                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7942                                 rdev, wdev, scan) < 0) {
7943                         idx--;
7944                         break;
7945                 }
7946         }
7947
7948         spin_unlock_bh(&rdev->bss_lock);
7949         wdev_unlock(wdev);
7950
7951         cb->args[2] = idx;
7952         rtnl_unlock();
7953
7954         return skb->len;
7955 }
7956
7957 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7958                                int flags, struct net_device *dev,
7959                                bool allow_radio_stats,
7960                                struct survey_info *survey)
7961 {
7962         void *hdr;
7963         struct nlattr *infoattr;
7964
7965         /* skip radio stats if userspace didn't request them */
7966         if (!survey->channel && !allow_radio_stats)
7967                 return 0;
7968
7969         hdr = nl80211hdr_put(msg, portid, seq, flags,
7970                              NL80211_CMD_NEW_SURVEY_RESULTS);
7971         if (!hdr)
7972                 return -ENOMEM;
7973
7974         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7975                 goto nla_put_failure;
7976
7977         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7978         if (!infoattr)
7979                 goto nla_put_failure;
7980
7981         if (survey->channel &&
7982             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7983                         survey->channel->center_freq))
7984                 goto nla_put_failure;
7985
7986         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7987             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7988                 goto nla_put_failure;
7989         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7990             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7991                 goto nla_put_failure;
7992         if ((survey->filled & SURVEY_INFO_TIME) &&
7993             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7994                         survey->time, NL80211_SURVEY_INFO_PAD))
7995                 goto nla_put_failure;
7996         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7997             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7998                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7999                 goto nla_put_failure;
8000         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
8001             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
8002                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
8003                 goto nla_put_failure;
8004         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
8005             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
8006                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
8007                 goto nla_put_failure;
8008         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
8009             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
8010                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
8011                 goto nla_put_failure;
8012         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
8013             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
8014                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
8015                 goto nla_put_failure;
8016
8017         nla_nest_end(msg, infoattr);
8018
8019         genlmsg_end(msg, hdr);
8020         return 0;
8021
8022  nla_put_failure:
8023         genlmsg_cancel(msg, hdr);
8024         return -EMSGSIZE;
8025 }
8026
8027 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
8028 {
8029         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
8030         struct survey_info survey;
8031         struct cfg80211_registered_device *rdev;
8032         struct wireless_dev *wdev;
8033         int survey_idx = cb->args[2];
8034         int res;
8035         bool radio_stats;
8036
8037         rtnl_lock();
8038         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
8039         if (res)
8040                 goto out_err;
8041
8042         /* prepare_wdev_dump parsed the attributes */
8043         radio_stats = attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
8044
8045         if (!wdev->netdev) {
8046                 res = -EINVAL;
8047                 goto out_err;
8048         }
8049
8050         if (!rdev->ops->dump_survey) {
8051                 res = -EOPNOTSUPP;
8052                 goto out_err;
8053         }
8054
8055         while (1) {
8056                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
8057                 if (res == -ENOENT)
8058                         break;
8059                 if (res)
8060                         goto out_err;
8061
8062                 /* don't send disabled channels, but do send non-channel data */
8063                 if (survey.channel &&
8064                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
8065                         survey_idx++;
8066                         continue;
8067                 }
8068
8069                 if (nl80211_send_survey(skb,
8070                                 NETLINK_CB(cb->skb).portid,
8071                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
8072                                 wdev->netdev, radio_stats, &survey) < 0)
8073                         goto out;
8074                 survey_idx++;
8075         }
8076
8077  out:
8078         cb->args[2] = survey_idx;
8079         res = skb->len;
8080  out_err:
8081         rtnl_unlock();
8082         return res;
8083 }
8084
8085 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
8086 {
8087         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
8088                                   NL80211_WPA_VERSION_2));
8089 }
8090
8091 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
8092 {
8093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8094         struct net_device *dev = info->user_ptr[1];
8095         struct ieee80211_channel *chan;
8096         const u8 *bssid, *ssid, *ie = NULL, *auth_data = NULL;
8097         int err, ssid_len, ie_len = 0, auth_data_len = 0;
8098         enum nl80211_auth_type auth_type;
8099         struct key_parse key;
8100         bool local_state_change;
8101
8102         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8103                 return -EINVAL;
8104
8105         if (!info->attrs[NL80211_ATTR_MAC])
8106                 return -EINVAL;
8107
8108         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
8109                 return -EINVAL;
8110
8111         if (!info->attrs[NL80211_ATTR_SSID])
8112                 return -EINVAL;
8113
8114         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8115                 return -EINVAL;
8116
8117         err = nl80211_parse_key(info, &key);
8118         if (err)
8119                 return err;
8120
8121         if (key.idx >= 0) {
8122                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
8123                         return -EINVAL;
8124                 if (!key.p.key || !key.p.key_len)
8125                         return -EINVAL;
8126                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
8127                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
8128                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
8129                      key.p.key_len != WLAN_KEY_LEN_WEP104))
8130                         return -EINVAL;
8131                 if (key.idx > 3)
8132                         return -EINVAL;
8133         } else {
8134                 key.p.key_len = 0;
8135                 key.p.key = NULL;
8136         }
8137
8138         if (key.idx >= 0) {
8139                 int i;
8140                 bool ok = false;
8141
8142                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
8143                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
8144                                 ok = true;
8145                                 break;
8146                         }
8147                 }
8148                 if (!ok)
8149                         return -EINVAL;
8150         }
8151
8152         if (!rdev->ops->auth)
8153                 return -EOPNOTSUPP;
8154
8155         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8156             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8157                 return -EOPNOTSUPP;
8158
8159         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8160         chan = nl80211_get_valid_chan(&rdev->wiphy,
8161                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8162         if (!chan)
8163                 return -EINVAL;
8164
8165         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8166         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8167
8168         if (info->attrs[NL80211_ATTR_IE]) {
8169                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8170                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8171         }
8172
8173         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8174         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
8175                 return -EINVAL;
8176
8177         if ((auth_type == NL80211_AUTHTYPE_SAE ||
8178              auth_type == NL80211_AUTHTYPE_FILS_SK ||
8179              auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
8180              auth_type == NL80211_AUTHTYPE_FILS_PK) &&
8181             !info->attrs[NL80211_ATTR_AUTH_DATA])
8182                 return -EINVAL;
8183
8184         if (info->attrs[NL80211_ATTR_AUTH_DATA]) {
8185                 if (auth_type != NL80211_AUTHTYPE_SAE &&
8186                     auth_type != NL80211_AUTHTYPE_FILS_SK &&
8187                     auth_type != NL80211_AUTHTYPE_FILS_SK_PFS &&
8188                     auth_type != NL80211_AUTHTYPE_FILS_PK)
8189                         return -EINVAL;
8190                 auth_data = nla_data(info->attrs[NL80211_ATTR_AUTH_DATA]);
8191                 auth_data_len = nla_len(info->attrs[NL80211_ATTR_AUTH_DATA]);
8192                 /* need to include at least Auth Transaction and Status Code */
8193                 if (auth_data_len < 4)
8194                         return -EINVAL;
8195         }
8196
8197         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8198
8199         /*
8200          * Since we no longer track auth state, ignore
8201          * requests to only change local state.
8202          */
8203         if (local_state_change)
8204                 return 0;
8205
8206         wdev_lock(dev->ieee80211_ptr);
8207         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
8208                                  ssid, ssid_len, ie, ie_len,
8209                                  key.p.key, key.p.key_len, key.idx,
8210                                  auth_data, auth_data_len);
8211         wdev_unlock(dev->ieee80211_ptr);
8212         return err;
8213 }
8214
8215 static int validate_pae_over_nl80211(struct cfg80211_registered_device *rdev,
8216                                      struct genl_info *info)
8217 {
8218         if (!info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
8219                 GENL_SET_ERR_MSG(info, "SOCKET_OWNER not set");
8220                 return -EINVAL;
8221         }
8222
8223         if (!rdev->ops->tx_control_port ||
8224             !wiphy_ext_feature_isset(&rdev->wiphy,
8225                                      NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211))
8226                 return -EOPNOTSUPP;
8227
8228         return 0;
8229 }
8230
8231 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
8232                                    struct genl_info *info,
8233                                    struct cfg80211_crypto_settings *settings,
8234                                    int cipher_limit)
8235 {
8236         memset(settings, 0, sizeof(*settings));
8237
8238         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
8239
8240         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
8241                 u16 proto;
8242
8243                 proto = nla_get_u16(
8244                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
8245                 settings->control_port_ethertype = cpu_to_be16(proto);
8246                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
8247                     proto != ETH_P_PAE)
8248                         return -EINVAL;
8249                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
8250                         settings->control_port_no_encrypt = true;
8251         } else
8252                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
8253
8254         if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) {
8255                 int r = validate_pae_over_nl80211(rdev, info);
8256
8257                 if (r < 0)
8258                         return r;
8259
8260                 settings->control_port_over_nl80211 = true;
8261         }
8262
8263         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
8264                 void *data;
8265                 int len, i;
8266
8267                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
8268                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
8269                 settings->n_ciphers_pairwise = len / sizeof(u32);
8270
8271                 if (len % sizeof(u32))
8272                         return -EINVAL;
8273
8274                 if (settings->n_ciphers_pairwise > cipher_limit)
8275                         return -EINVAL;
8276
8277                 memcpy(settings->ciphers_pairwise, data, len);
8278
8279                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
8280                         if (!cfg80211_supported_cipher_suite(
8281                                         &rdev->wiphy,
8282                                         settings->ciphers_pairwise[i]))
8283                                 return -EINVAL;
8284         }
8285
8286         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
8287                 settings->cipher_group =
8288                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
8289                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
8290                                                      settings->cipher_group))
8291                         return -EINVAL;
8292         }
8293
8294         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
8295                 settings->wpa_versions =
8296                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
8297                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
8298                         return -EINVAL;
8299         }
8300
8301         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
8302                 void *data;
8303                 int len;
8304
8305                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
8306                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
8307                 settings->n_akm_suites = len / sizeof(u32);
8308
8309                 if (len % sizeof(u32))
8310                         return -EINVAL;
8311
8312                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
8313                         return -EINVAL;
8314
8315                 memcpy(settings->akm_suites, data, len);
8316         }
8317
8318         if (info->attrs[NL80211_ATTR_PMK]) {
8319                 if (nla_len(info->attrs[NL80211_ATTR_PMK]) != WLAN_PMK_LEN)
8320                         return -EINVAL;
8321                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
8322                                              NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK))
8323                         return -EINVAL;
8324                 settings->psk = nla_data(info->attrs[NL80211_ATTR_PMK]);
8325         }
8326
8327         return 0;
8328 }
8329
8330 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
8331 {
8332         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8333         struct net_device *dev = info->user_ptr[1];
8334         struct ieee80211_channel *chan;
8335         struct cfg80211_assoc_request req = {};
8336         const u8 *bssid, *ssid;
8337         int err, ssid_len = 0;
8338
8339         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8340                 return -EINVAL;
8341
8342         if (!info->attrs[NL80211_ATTR_MAC] ||
8343             !info->attrs[NL80211_ATTR_SSID] ||
8344             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
8345                 return -EINVAL;
8346
8347         if (!rdev->ops->assoc)
8348                 return -EOPNOTSUPP;
8349
8350         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8351             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8352                 return -EOPNOTSUPP;
8353
8354         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8355
8356         chan = nl80211_get_valid_chan(&rdev->wiphy,
8357                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8358         if (!chan)
8359                 return -EINVAL;
8360
8361         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8362         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8363
8364         if (info->attrs[NL80211_ATTR_IE]) {
8365                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8366                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8367         }
8368
8369         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8370                 enum nl80211_mfp mfp =
8371                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8372                 if (mfp == NL80211_MFP_REQUIRED)
8373                         req.use_mfp = true;
8374                 else if (mfp != NL80211_MFP_NO)
8375                         return -EINVAL;
8376         }
8377
8378         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8379                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8380
8381         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8382                 req.flags |= ASSOC_REQ_DISABLE_HT;
8383
8384         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8385                 memcpy(&req.ht_capa_mask,
8386                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8387                        sizeof(req.ht_capa_mask));
8388
8389         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8390                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8391                         return -EINVAL;
8392                 memcpy(&req.ht_capa,
8393                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8394                        sizeof(req.ht_capa));
8395         }
8396
8397         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8398                 req.flags |= ASSOC_REQ_DISABLE_VHT;
8399
8400         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8401                 memcpy(&req.vht_capa_mask,
8402                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8403                        sizeof(req.vht_capa_mask));
8404
8405         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8406                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8407                         return -EINVAL;
8408                 memcpy(&req.vht_capa,
8409                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8410                        sizeof(req.vht_capa));
8411         }
8412
8413         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8414                 if (!((rdev->wiphy.features &
8415                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8416                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8417                     !wiphy_ext_feature_isset(&rdev->wiphy,
8418                                              NL80211_EXT_FEATURE_RRM))
8419                         return -EINVAL;
8420                 req.flags |= ASSOC_REQ_USE_RRM;
8421         }
8422
8423         if (info->attrs[NL80211_ATTR_FILS_KEK]) {
8424                 req.fils_kek = nla_data(info->attrs[NL80211_ATTR_FILS_KEK]);
8425                 req.fils_kek_len = nla_len(info->attrs[NL80211_ATTR_FILS_KEK]);
8426                 if (!info->attrs[NL80211_ATTR_FILS_NONCES])
8427                         return -EINVAL;
8428                 req.fils_nonces =
8429                         nla_data(info->attrs[NL80211_ATTR_FILS_NONCES]);
8430         }
8431
8432         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
8433         if (!err) {
8434                 wdev_lock(dev->ieee80211_ptr);
8435
8436                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
8437                                           ssid, ssid_len, &req);
8438
8439                 if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
8440                         dev->ieee80211_ptr->conn_owner_nlportid =
8441                                 info->snd_portid;
8442                         memcpy(dev->ieee80211_ptr->disconnect_bssid,
8443                                bssid, ETH_ALEN);
8444                 }
8445
8446                 wdev_unlock(dev->ieee80211_ptr);
8447         }
8448
8449         return err;
8450 }
8451
8452 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
8453 {
8454         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8455         struct net_device *dev = info->user_ptr[1];
8456         const u8 *ie = NULL, *bssid;
8457         int ie_len = 0, err;
8458         u16 reason_code;
8459         bool local_state_change;
8460
8461         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8462                 return -EINVAL;
8463
8464         if (!info->attrs[NL80211_ATTR_MAC])
8465                 return -EINVAL;
8466
8467         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8468                 return -EINVAL;
8469
8470         if (!rdev->ops->deauth)
8471                 return -EOPNOTSUPP;
8472
8473         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8474             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8475                 return -EOPNOTSUPP;
8476
8477         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8478
8479         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8480         if (reason_code == 0) {
8481                 /* Reason Code 0 is reserved */
8482                 return -EINVAL;
8483         }
8484
8485         if (info->attrs[NL80211_ATTR_IE]) {
8486                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8487                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8488         }
8489
8490         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8491
8492         wdev_lock(dev->ieee80211_ptr);
8493         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
8494                                    local_state_change);
8495         wdev_unlock(dev->ieee80211_ptr);
8496         return err;
8497 }
8498
8499 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
8500 {
8501         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8502         struct net_device *dev = info->user_ptr[1];
8503         const u8 *ie = NULL, *bssid;
8504         int ie_len = 0, err;
8505         u16 reason_code;
8506         bool local_state_change;
8507
8508         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8509                 return -EINVAL;
8510
8511         if (!info->attrs[NL80211_ATTR_MAC])
8512                 return -EINVAL;
8513
8514         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8515                 return -EINVAL;
8516
8517         if (!rdev->ops->disassoc)
8518                 return -EOPNOTSUPP;
8519
8520         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8521             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8522                 return -EOPNOTSUPP;
8523
8524         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8525
8526         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8527         if (reason_code == 0) {
8528                 /* Reason Code 0 is reserved */
8529                 return -EINVAL;
8530         }
8531
8532         if (info->attrs[NL80211_ATTR_IE]) {
8533                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8534                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8535         }
8536
8537         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8538
8539         wdev_lock(dev->ieee80211_ptr);
8540         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
8541                                      local_state_change);
8542         wdev_unlock(dev->ieee80211_ptr);
8543         return err;
8544 }
8545
8546 static bool
8547 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
8548                          int mcast_rate[NUM_NL80211_BANDS],
8549                          int rateval)
8550 {
8551         struct wiphy *wiphy = &rdev->wiphy;
8552         bool found = false;
8553         int band, i;
8554
8555         for (band = 0; band < NUM_NL80211_BANDS; band++) {
8556                 struct ieee80211_supported_band *sband;
8557
8558                 sband = wiphy->bands[band];
8559                 if (!sband)
8560                         continue;
8561
8562                 for (i = 0; i < sband->n_bitrates; i++) {
8563                         if (sband->bitrates[i].bitrate == rateval) {
8564                                 mcast_rate[band] = i + 1;
8565                                 found = true;
8566                                 break;
8567                         }
8568                 }
8569         }
8570
8571         return found;
8572 }
8573
8574 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
8575 {
8576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8577         struct net_device *dev = info->user_ptr[1];
8578         struct cfg80211_ibss_params ibss;
8579         struct wiphy *wiphy;
8580         struct cfg80211_cached_keys *connkeys = NULL;
8581         int err;
8582
8583         memset(&ibss, 0, sizeof(ibss));
8584
8585         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8586                 return -EINVAL;
8587
8588         if (!info->attrs[NL80211_ATTR_SSID] ||
8589             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8590                 return -EINVAL;
8591
8592         ibss.beacon_interval = 100;
8593
8594         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
8595                 ibss.beacon_interval =
8596                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8597
8598         err = cfg80211_validate_beacon_int(rdev, NL80211_IFTYPE_ADHOC,
8599                                            ibss.beacon_interval);
8600         if (err)
8601                 return err;
8602
8603         if (!rdev->ops->join_ibss)
8604                 return -EOPNOTSUPP;
8605
8606         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8607                 return -EOPNOTSUPP;
8608
8609         wiphy = &rdev->wiphy;
8610
8611         if (info->attrs[NL80211_ATTR_MAC]) {
8612                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8613
8614                 if (!is_valid_ether_addr(ibss.bssid))
8615                         return -EINVAL;
8616         }
8617         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8618         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8619
8620         if (info->attrs[NL80211_ATTR_IE]) {
8621                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8622                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8623         }
8624
8625         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
8626         if (err)
8627                 return err;
8628
8629         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
8630                                      NL80211_IFTYPE_ADHOC))
8631                 return -EINVAL;
8632
8633         switch (ibss.chandef.width) {
8634         case NL80211_CHAN_WIDTH_5:
8635         case NL80211_CHAN_WIDTH_10:
8636         case NL80211_CHAN_WIDTH_20_NOHT:
8637                 break;
8638         case NL80211_CHAN_WIDTH_20:
8639         case NL80211_CHAN_WIDTH_40:
8640                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8641                         return -EINVAL;
8642                 break;
8643         case NL80211_CHAN_WIDTH_80:
8644         case NL80211_CHAN_WIDTH_80P80:
8645         case NL80211_CHAN_WIDTH_160:
8646                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8647                         return -EINVAL;
8648                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
8649                                              NL80211_EXT_FEATURE_VHT_IBSS))
8650                         return -EINVAL;
8651                 break;
8652         default:
8653                 return -EINVAL;
8654         }
8655
8656         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
8657         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
8658
8659         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8660                 u8 *rates =
8661                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8662                 int n_rates =
8663                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8664                 struct ieee80211_supported_band *sband =
8665                         wiphy->bands[ibss.chandef.chan->band];
8666
8667                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8668                                              &ibss.basic_rates);
8669                 if (err)
8670                         return err;
8671         }
8672
8673         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8674                 memcpy(&ibss.ht_capa_mask,
8675                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8676                        sizeof(ibss.ht_capa_mask));
8677
8678         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8679                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8680                         return -EINVAL;
8681                 memcpy(&ibss.ht_capa,
8682                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8683                        sizeof(ibss.ht_capa));
8684         }
8685
8686         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8687             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
8688                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8689                 return -EINVAL;
8690
8691         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8692                 bool no_ht = false;
8693
8694                 connkeys = nl80211_parse_connkeys(rdev, info, &no_ht);
8695                 if (IS_ERR(connkeys))
8696                         return PTR_ERR(connkeys);
8697
8698                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
8699                     no_ht) {
8700                         kzfree(connkeys);
8701                         return -EINVAL;
8702                 }
8703         }
8704
8705         ibss.control_port =
8706                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
8707
8708         if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) {
8709                 int r = validate_pae_over_nl80211(rdev, info);
8710
8711                 if (r < 0)
8712                         return r;
8713
8714                 ibss.control_port_over_nl80211 = true;
8715         }
8716
8717         ibss.userspace_handles_dfs =
8718                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
8719
8720         wdev_lock(dev->ieee80211_ptr);
8721         err = __cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
8722         if (err)
8723                 kzfree(connkeys);
8724         else if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
8725                 dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;
8726         wdev_unlock(dev->ieee80211_ptr);
8727
8728         return err;
8729 }
8730
8731 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
8732 {
8733         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8734         struct net_device *dev = info->user_ptr[1];
8735
8736         if (!rdev->ops->leave_ibss)
8737                 return -EOPNOTSUPP;
8738
8739         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8740                 return -EOPNOTSUPP;
8741
8742         return cfg80211_leave_ibss(rdev, dev, false);
8743 }
8744
8745 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
8746 {
8747         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8748         struct net_device *dev = info->user_ptr[1];
8749         int mcast_rate[NUM_NL80211_BANDS];
8750         u32 nla_rate;
8751         int err;
8752
8753         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
8754             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
8755             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
8756                 return -EOPNOTSUPP;
8757
8758         if (!rdev->ops->set_mcast_rate)
8759                 return -EOPNOTSUPP;
8760
8761         memset(mcast_rate, 0, sizeof(mcast_rate));
8762
8763         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
8764                 return -EINVAL;
8765
8766         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
8767         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
8768                 return -EINVAL;
8769
8770         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
8771
8772         return err;
8773 }
8774
8775 static struct sk_buff *
8776 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
8777                             struct wireless_dev *wdev, int approxlen,
8778                             u32 portid, u32 seq, enum nl80211_commands cmd,
8779                             enum nl80211_attrs attr,
8780                             const struct nl80211_vendor_cmd_info *info,
8781                             gfp_t gfp)
8782 {
8783         struct sk_buff *skb;
8784         void *hdr;
8785         struct nlattr *data;
8786
8787         skb = nlmsg_new(approxlen + 100, gfp);
8788         if (!skb)
8789                 return NULL;
8790
8791         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
8792         if (!hdr) {
8793                 kfree_skb(skb);
8794                 return NULL;
8795         }
8796
8797         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
8798                 goto nla_put_failure;
8799
8800         if (info) {
8801                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
8802                                 info->vendor_id))
8803                         goto nla_put_failure;
8804                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
8805                                 info->subcmd))
8806                         goto nla_put_failure;
8807         }
8808
8809         if (wdev) {
8810                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
8811                                       wdev_id(wdev), NL80211_ATTR_PAD))
8812                         goto nla_put_failure;
8813                 if (wdev->netdev &&
8814                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
8815                                 wdev->netdev->ifindex))
8816                         goto nla_put_failure;
8817         }
8818
8819         data = nla_nest_start(skb, attr);
8820         if (!data)
8821                 goto nla_put_failure;
8822
8823         ((void **)skb->cb)[0] = rdev;
8824         ((void **)skb->cb)[1] = hdr;
8825         ((void **)skb->cb)[2] = data;
8826
8827         return skb;
8828
8829  nla_put_failure:
8830         kfree_skb(skb);
8831         return NULL;
8832 }
8833
8834 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8835                                            struct wireless_dev *wdev,
8836                                            enum nl80211_commands cmd,
8837                                            enum nl80211_attrs attr,
8838                                            int vendor_event_idx,
8839                                            int approxlen, gfp_t gfp)
8840 {
8841         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8842         const struct nl80211_vendor_cmd_info *info;
8843
8844         switch (cmd) {
8845         case NL80211_CMD_TESTMODE:
8846                 if (WARN_ON(vendor_event_idx != -1))
8847                         return NULL;
8848                 info = NULL;
8849                 break;
8850         case NL80211_CMD_VENDOR:
8851                 if (WARN_ON(vendor_event_idx < 0 ||
8852                             vendor_event_idx >= wiphy->n_vendor_events))
8853                         return NULL;
8854                 info = &wiphy->vendor_events[vendor_event_idx];
8855                 break;
8856         default:
8857                 WARN_ON(1);
8858                 return NULL;
8859         }
8860
8861         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8862                                            cmd, attr, info, gfp);
8863 }
8864 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8865
8866 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8867 {
8868         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8869         void *hdr = ((void **)skb->cb)[1];
8870         struct nlattr *data = ((void **)skb->cb)[2];
8871         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8872
8873         /* clear CB data for netlink core to own from now on */
8874         memset(skb->cb, 0, sizeof(skb->cb));
8875
8876         nla_nest_end(skb, data);
8877         genlmsg_end(skb, hdr);
8878
8879         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8880                 mcgrp = NL80211_MCGRP_VENDOR;
8881
8882         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8883                                 mcgrp, gfp);
8884 }
8885 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8886
8887 #ifdef CONFIG_NL80211_TESTMODE
8888 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8889 {
8890         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8891         struct wireless_dev *wdev =
8892                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8893         int err;
8894
8895         if (!rdev->ops->testmode_cmd)
8896                 return -EOPNOTSUPP;
8897
8898         if (IS_ERR(wdev)) {
8899                 err = PTR_ERR(wdev);
8900                 if (err != -EINVAL)
8901                         return err;
8902                 wdev = NULL;
8903         } else if (wdev->wiphy != &rdev->wiphy) {
8904                 return -EINVAL;
8905         }
8906
8907         if (!info->attrs[NL80211_ATTR_TESTDATA])
8908                 return -EINVAL;
8909
8910         rdev->cur_cmd_info = info;
8911         err = rdev_testmode_cmd(rdev, wdev,
8912                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8913                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8914         rdev->cur_cmd_info = NULL;
8915
8916         return err;
8917 }
8918
8919 static int nl80211_testmode_dump(struct sk_buff *skb,
8920                                  struct netlink_callback *cb)
8921 {
8922         struct cfg80211_registered_device *rdev;
8923         int err;
8924         long phy_idx;
8925         void *data = NULL;
8926         int data_len = 0;
8927
8928         rtnl_lock();
8929
8930         if (cb->args[0]) {
8931                 /*
8932                  * 0 is a valid index, but not valid for args[0],
8933                  * so we need to offset by 1.
8934                  */
8935                 phy_idx = cb->args[0] - 1;
8936
8937                 rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8938                 if (!rdev) {
8939                         err = -ENOENT;
8940                         goto out_err;
8941                 }
8942         } else {
8943                 struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
8944
8945                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8946                                   attrbuf, nl80211_fam.maxattr,
8947                                   nl80211_policy, NULL);
8948                 if (err)
8949                         goto out_err;
8950
8951                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
8952                 if (IS_ERR(rdev)) {
8953                         err = PTR_ERR(rdev);
8954                         goto out_err;
8955                 }
8956                 phy_idx = rdev->wiphy_idx;
8957
8958                 if (attrbuf[NL80211_ATTR_TESTDATA])
8959                         cb->args[1] = (long)attrbuf[NL80211_ATTR_TESTDATA];
8960         }
8961
8962         if (cb->args[1]) {
8963                 data = nla_data((void *)cb->args[1]);
8964                 data_len = nla_len((void *)cb->args[1]);
8965         }
8966
8967         if (!rdev->ops->testmode_dump) {
8968                 err = -EOPNOTSUPP;
8969                 goto out_err;
8970         }
8971
8972         while (1) {
8973                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8974                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8975                                            NL80211_CMD_TESTMODE);
8976                 struct nlattr *tmdata;
8977
8978                 if (!hdr)
8979                         break;
8980
8981                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8982                         genlmsg_cancel(skb, hdr);
8983                         break;
8984                 }
8985
8986                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8987                 if (!tmdata) {
8988                         genlmsg_cancel(skb, hdr);
8989                         break;
8990                 }
8991                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8992                 nla_nest_end(skb, tmdata);
8993
8994                 if (err == -ENOBUFS || err == -ENOENT) {
8995                         genlmsg_cancel(skb, hdr);
8996                         break;
8997                 } else if (err) {
8998                         genlmsg_cancel(skb, hdr);
8999                         goto out_err;
9000                 }
9001
9002                 genlmsg_end(skb, hdr);
9003         }
9004
9005         err = skb->len;
9006         /* see above */
9007         cb->args[0] = phy_idx + 1;
9008  out_err:
9009         rtnl_unlock();
9010         return err;
9011 }
9012 #endif
9013
9014 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
9015 {
9016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9017         struct net_device *dev = info->user_ptr[1];
9018         struct cfg80211_connect_params connect;
9019         struct wiphy *wiphy;
9020         struct cfg80211_cached_keys *connkeys = NULL;
9021         int err;
9022
9023         memset(&connect, 0, sizeof(connect));
9024
9025         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9026                 return -EINVAL;
9027
9028         if (!info->attrs[NL80211_ATTR_SSID] ||
9029             !nla_len(info->attrs[NL80211_ATTR_SSID]))
9030                 return -EINVAL;
9031
9032         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
9033                 connect.auth_type =
9034                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
9035                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
9036                                              NL80211_CMD_CONNECT))
9037                         return -EINVAL;
9038         } else
9039                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
9040
9041         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
9042
9043         if (info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS] &&
9044             !wiphy_ext_feature_isset(&rdev->wiphy,
9045                                      NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
9046                 return -EINVAL;
9047         connect.want_1x = info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS];
9048
9049         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
9050                                       NL80211_MAX_NR_CIPHER_SUITES);
9051         if (err)
9052                 return err;
9053
9054         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9055             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9056                 return -EOPNOTSUPP;
9057
9058         wiphy = &rdev->wiphy;
9059
9060         connect.bg_scan_period = -1;
9061         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
9062                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
9063                 connect.bg_scan_period =
9064                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
9065         }
9066
9067         if (info->attrs[NL80211_ATTR_MAC])
9068                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
9069         else if (info->attrs[NL80211_ATTR_MAC_HINT])
9070                 connect.bssid_hint =
9071                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
9072         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
9073         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
9074
9075         if (info->attrs[NL80211_ATTR_IE]) {
9076                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9077                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9078         }
9079
9080         if (info->attrs[NL80211_ATTR_USE_MFP]) {
9081                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
9082                 if (connect.mfp == NL80211_MFP_OPTIONAL &&
9083                     !wiphy_ext_feature_isset(&rdev->wiphy,
9084                                              NL80211_EXT_FEATURE_MFP_OPTIONAL))
9085                         return -EOPNOTSUPP;
9086
9087                 if (connect.mfp != NL80211_MFP_REQUIRED &&
9088                     connect.mfp != NL80211_MFP_NO &&
9089                     connect.mfp != NL80211_MFP_OPTIONAL)
9090                         return -EINVAL;
9091         } else {
9092                 connect.mfp = NL80211_MFP_NO;
9093         }
9094
9095         if (info->attrs[NL80211_ATTR_PREV_BSSID])
9096                 connect.prev_bssid =
9097                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
9098
9099         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9100                 connect.channel = nl80211_get_valid_chan(
9101                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
9102                 if (!connect.channel)
9103                         return -EINVAL;
9104         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
9105                 connect.channel_hint = nl80211_get_valid_chan(
9106                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
9107                 if (!connect.channel_hint)
9108                         return -EINVAL;
9109         }
9110
9111         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
9112                 connkeys = nl80211_parse_connkeys(rdev, info, NULL);
9113                 if (IS_ERR(connkeys))
9114                         return PTR_ERR(connkeys);
9115         }
9116
9117         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
9118                 connect.flags |= ASSOC_REQ_DISABLE_HT;
9119
9120         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
9121                 memcpy(&connect.ht_capa_mask,
9122                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
9123                        sizeof(connect.ht_capa_mask));
9124
9125         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
9126                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
9127                         kzfree(connkeys);
9128                         return -EINVAL;
9129                 }
9130                 memcpy(&connect.ht_capa,
9131                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
9132                        sizeof(connect.ht_capa));
9133         }
9134
9135         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
9136                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
9137
9138         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
9139                 memcpy(&connect.vht_capa_mask,
9140                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
9141                        sizeof(connect.vht_capa_mask));
9142
9143         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
9144                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
9145                         kzfree(connkeys);
9146                         return -EINVAL;
9147                 }
9148                 memcpy(&connect.vht_capa,
9149                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
9150                        sizeof(connect.vht_capa));
9151         }
9152
9153         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
9154                 if (!((rdev->wiphy.features &
9155                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
9156                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
9157                     !wiphy_ext_feature_isset(&rdev->wiphy,
9158                                              NL80211_EXT_FEATURE_RRM)) {
9159                         kzfree(connkeys);
9160                         return -EINVAL;
9161                 }
9162                 connect.flags |= ASSOC_REQ_USE_RRM;
9163         }
9164
9165         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
9166         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
9167                 kzfree(connkeys);
9168                 return -EOPNOTSUPP;
9169         }
9170
9171         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
9172                 /* bss selection makes no sense if bssid is set */
9173                 if (connect.bssid) {
9174                         kzfree(connkeys);
9175                         return -EINVAL;
9176                 }
9177
9178                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
9179                                        wiphy, &connect.bss_select);
9180                 if (err) {
9181                         kzfree(connkeys);
9182                         return err;
9183                 }
9184         }
9185
9186         if (wiphy_ext_feature_isset(&rdev->wiphy,
9187                                     NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
9188             info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] &&
9189             info->attrs[NL80211_ATTR_FILS_ERP_REALM] &&
9190             info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] &&
9191             info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
9192                 connect.fils_erp_username =
9193                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
9194                 connect.fils_erp_username_len =
9195                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
9196                 connect.fils_erp_realm =
9197                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
9198                 connect.fils_erp_realm_len =
9199                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
9200                 connect.fils_erp_next_seq_num =
9201                         nla_get_u16(
9202                            info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM]);
9203                 connect.fils_erp_rrk =
9204                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
9205                 connect.fils_erp_rrk_len =
9206                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
9207         } else if (info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] ||
9208                    info->attrs[NL80211_ATTR_FILS_ERP_REALM] ||
9209                    info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] ||
9210                    info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
9211                 kzfree(connkeys);
9212                 return -EINVAL;
9213         }
9214
9215         if (nla_get_flag(info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])) {
9216                 if (!info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
9217                         kzfree(connkeys);
9218                         GENL_SET_ERR_MSG(info,
9219                                          "external auth requires connection ownership");
9220                         return -EINVAL;
9221                 }
9222                 connect.flags |= CONNECT_REQ_EXTERNAL_AUTH_SUPPORT;
9223         }
9224
9225         wdev_lock(dev->ieee80211_ptr);
9226
9227         err = cfg80211_connect(rdev, dev, &connect, connkeys,
9228                                connect.prev_bssid);
9229         if (err)
9230                 kzfree(connkeys);
9231
9232         if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
9233                 dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;
9234                 if (connect.bssid)
9235                         memcpy(dev->ieee80211_ptr->disconnect_bssid,
9236                                connect.bssid, ETH_ALEN);
9237                 else
9238                         memset(dev->ieee80211_ptr->disconnect_bssid,
9239                                0, ETH_ALEN);
9240         }
9241
9242         wdev_unlock(dev->ieee80211_ptr);
9243
9244         return err;
9245 }
9246
9247 static int nl80211_update_connect_params(struct sk_buff *skb,
9248                                          struct genl_info *info)
9249 {
9250         struct cfg80211_connect_params connect = {};
9251         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9252         struct net_device *dev = info->user_ptr[1];
9253         struct wireless_dev *wdev = dev->ieee80211_ptr;
9254         u32 changed = 0;
9255         int ret;
9256
9257         if (!rdev->ops->update_connect_params)
9258                 return -EOPNOTSUPP;
9259
9260         if (info->attrs[NL80211_ATTR_IE]) {
9261                 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9262                         return -EINVAL;
9263                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9264                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9265                 changed |= UPDATE_ASSOC_IES;
9266         }
9267
9268         wdev_lock(dev->ieee80211_ptr);
9269         if (!wdev->current_bss)
9270                 ret = -ENOLINK;
9271         else
9272                 ret = rdev_update_connect_params(rdev, dev, &connect, changed);
9273         wdev_unlock(dev->ieee80211_ptr);
9274
9275         return ret;
9276 }
9277
9278 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
9279 {
9280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9281         struct net_device *dev = info->user_ptr[1];
9282         u16 reason;
9283         int ret;
9284
9285         if (!info->attrs[NL80211_ATTR_REASON_CODE])
9286                 reason = WLAN_REASON_DEAUTH_LEAVING;
9287         else
9288                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
9289
9290         if (reason == 0)
9291                 return -EINVAL;
9292
9293         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9294             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9295                 return -EOPNOTSUPP;
9296
9297         wdev_lock(dev->ieee80211_ptr);
9298         ret = cfg80211_disconnect(rdev, dev, reason, true);
9299         wdev_unlock(dev->ieee80211_ptr);
9300         return ret;
9301 }
9302
9303 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
9304 {
9305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9306         struct net *net;
9307         int err;
9308
9309         if (info->attrs[NL80211_ATTR_PID]) {
9310                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
9311
9312                 net = get_net_ns_by_pid(pid);
9313         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
9314                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
9315
9316                 net = get_net_ns_by_fd(fd);
9317         } else {
9318                 return -EINVAL;
9319         }
9320
9321         if (IS_ERR(net))
9322                 return PTR_ERR(net);
9323
9324         err = 0;
9325
9326         /* check if anything to do */
9327         if (!net_eq(wiphy_net(&rdev->wiphy), net))
9328                 err = cfg80211_switch_netns(rdev, net);
9329
9330         put_net(net);
9331         return err;
9332 }
9333
9334 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
9335 {
9336         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9337         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
9338                         struct cfg80211_pmksa *pmksa) = NULL;
9339         struct net_device *dev = info->user_ptr[1];
9340         struct cfg80211_pmksa pmksa;
9341
9342         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
9343
9344         if (!info->attrs[NL80211_ATTR_PMKID])
9345                 return -EINVAL;
9346
9347         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
9348
9349         if (info->attrs[NL80211_ATTR_MAC]) {
9350                 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
9351         } else if (info->attrs[NL80211_ATTR_SSID] &&
9352                    info->attrs[NL80211_ATTR_FILS_CACHE_ID] &&
9353                    (info->genlhdr->cmd == NL80211_CMD_DEL_PMKSA ||
9354                     info->attrs[NL80211_ATTR_PMK])) {
9355                 pmksa.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
9356                 pmksa.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
9357                 pmksa.cache_id =
9358                         nla_data(info->attrs[NL80211_ATTR_FILS_CACHE_ID]);
9359         } else {
9360                 return -EINVAL;
9361         }
9362         if (info->attrs[NL80211_ATTR_PMK]) {
9363                 pmksa.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
9364                 pmksa.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
9365         }
9366
9367         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9368             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9369                 return -EOPNOTSUPP;
9370
9371         switch (info->genlhdr->cmd) {
9372         case NL80211_CMD_SET_PMKSA:
9373                 rdev_ops = rdev->ops->set_pmksa;
9374                 break;
9375         case NL80211_CMD_DEL_PMKSA:
9376                 rdev_ops = rdev->ops->del_pmksa;
9377                 break;
9378         default:
9379                 WARN_ON(1);
9380                 break;
9381         }
9382
9383         if (!rdev_ops)
9384                 return -EOPNOTSUPP;
9385
9386         return rdev_ops(&rdev->wiphy, dev, &pmksa);
9387 }
9388
9389 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
9390 {
9391         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9392         struct net_device *dev = info->user_ptr[1];
9393
9394         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9395             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9396                 return -EOPNOTSUPP;
9397
9398         if (!rdev->ops->flush_pmksa)
9399                 return -EOPNOTSUPP;
9400
9401         return rdev_flush_pmksa(rdev, dev);
9402 }
9403
9404 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
9405 {
9406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9407         struct net_device *dev = info->user_ptr[1];
9408         u8 action_code, dialog_token;
9409         u32 peer_capability = 0;
9410         u16 status_code;
9411         u8 *peer;
9412         bool initiator;
9413
9414         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
9415             !rdev->ops->tdls_mgmt)
9416                 return -EOPNOTSUPP;
9417
9418         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
9419             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
9420             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
9421             !info->attrs[NL80211_ATTR_IE] ||
9422             !info->attrs[NL80211_ATTR_MAC])
9423                 return -EINVAL;
9424
9425         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9426         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
9427         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
9428         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
9429         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
9430         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
9431                 peer_capability =
9432                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
9433
9434         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
9435                               dialog_token, status_code, peer_capability,
9436                               initiator,
9437                               nla_data(info->attrs[NL80211_ATTR_IE]),
9438                               nla_len(info->attrs[NL80211_ATTR_IE]));
9439 }
9440
9441 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
9442 {
9443         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9444         struct net_device *dev = info->user_ptr[1];
9445         enum nl80211_tdls_operation operation;
9446         u8 *peer;
9447
9448         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
9449             !rdev->ops->tdls_oper)
9450                 return -EOPNOTSUPP;
9451
9452         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
9453             !info->attrs[NL80211_ATTR_MAC])
9454                 return -EINVAL;
9455
9456         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
9457         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9458
9459         return rdev_tdls_oper(rdev, dev, peer, operation);
9460 }
9461
9462 static int nl80211_remain_on_channel(struct sk_buff *skb,
9463                                      struct genl_info *info)
9464 {
9465         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9466         struct wireless_dev *wdev = info->user_ptr[1];
9467         struct cfg80211_chan_def chandef;
9468         const struct cfg80211_chan_def *compat_chandef;
9469         struct sk_buff *msg;
9470         void *hdr;
9471         u64 cookie;
9472         u32 duration;
9473         int err;
9474
9475         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
9476             !info->attrs[NL80211_ATTR_DURATION])
9477                 return -EINVAL;
9478
9479         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9480
9481         if (!rdev->ops->remain_on_channel ||
9482             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
9483                 return -EOPNOTSUPP;
9484
9485         /*
9486          * We should be on that channel for at least a minimum amount of
9487          * time (10ms) but no longer than the driver supports.
9488          */
9489         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9490             duration > rdev->wiphy.max_remain_on_channel_duration)
9491                 return -EINVAL;
9492
9493         err = nl80211_parse_chandef(rdev, info, &chandef);
9494         if (err)
9495                 return err;
9496
9497         wdev_lock(wdev);
9498         if (!cfg80211_off_channel_oper_allowed(wdev) &&
9499             !cfg80211_chandef_identical(&wdev->chandef, &chandef)) {
9500                 compat_chandef = cfg80211_chandef_compatible(&wdev->chandef,
9501                                                              &chandef);
9502                 if (compat_chandef != &chandef) {
9503                         wdev_unlock(wdev);
9504                         return -EBUSY;
9505                 }
9506         }
9507         wdev_unlock(wdev);
9508
9509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9510         if (!msg)
9511                 return -ENOMEM;
9512
9513         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9514                              NL80211_CMD_REMAIN_ON_CHANNEL);
9515         if (!hdr) {
9516                 err = -ENOBUFS;
9517                 goto free_msg;
9518         }
9519
9520         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
9521                                      duration, &cookie);
9522
9523         if (err)
9524                 goto free_msg;
9525
9526         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9527                               NL80211_ATTR_PAD))
9528                 goto nla_put_failure;
9529
9530         genlmsg_end(msg, hdr);
9531
9532         return genlmsg_reply(msg, info);
9533
9534  nla_put_failure:
9535         err = -ENOBUFS;
9536  free_msg:
9537         nlmsg_free(msg);
9538         return err;
9539 }
9540
9541 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
9542                                             struct genl_info *info)
9543 {
9544         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9545         struct wireless_dev *wdev = info->user_ptr[1];
9546         u64 cookie;
9547
9548         if (!info->attrs[NL80211_ATTR_COOKIE])
9549                 return -EINVAL;
9550
9551         if (!rdev->ops->cancel_remain_on_channel)
9552                 return -EOPNOTSUPP;
9553
9554         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9555
9556         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
9557 }
9558
9559 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
9560                                        struct genl_info *info)
9561 {
9562         struct cfg80211_bitrate_mask mask;
9563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9564         struct net_device *dev = info->user_ptr[1];
9565         int err;
9566
9567         if (!rdev->ops->set_bitrate_mask)
9568                 return -EOPNOTSUPP;
9569
9570         err = nl80211_parse_tx_bitrate_mask(info, &mask);
9571         if (err)
9572                 return err;
9573
9574         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
9575 }
9576
9577 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
9578 {
9579         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9580         struct wireless_dev *wdev = info->user_ptr[1];
9581         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
9582
9583         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
9584                 return -EINVAL;
9585
9586         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
9587                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
9588
9589         switch (wdev->iftype) {
9590         case NL80211_IFTYPE_STATION:
9591         case NL80211_IFTYPE_ADHOC:
9592         case NL80211_IFTYPE_P2P_CLIENT:
9593         case NL80211_IFTYPE_AP:
9594         case NL80211_IFTYPE_AP_VLAN:
9595         case NL80211_IFTYPE_MESH_POINT:
9596         case NL80211_IFTYPE_P2P_GO:
9597         case NL80211_IFTYPE_P2P_DEVICE:
9598                 break;
9599         case NL80211_IFTYPE_NAN:
9600         default:
9601                 return -EOPNOTSUPP;
9602         }
9603
9604         /* not much point in registering if we can't reply */
9605         if (!rdev->ops->mgmt_tx)
9606                 return -EOPNOTSUPP;
9607
9608         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
9609                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
9610                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
9611 }
9612
9613 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
9614 {
9615         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9616         struct wireless_dev *wdev = info->user_ptr[1];
9617         struct cfg80211_chan_def chandef;
9618         int err;
9619         void *hdr = NULL;
9620         u64 cookie;
9621         struct sk_buff *msg = NULL;
9622         struct cfg80211_mgmt_tx_params params = {
9623                 .dont_wait_for_ack =
9624                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
9625         };
9626
9627         if (!info->attrs[NL80211_ATTR_FRAME])
9628                 return -EINVAL;
9629
9630         if (!rdev->ops->mgmt_tx)
9631                 return -EOPNOTSUPP;
9632
9633         switch (wdev->iftype) {
9634         case NL80211_IFTYPE_P2P_DEVICE:
9635                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
9636                         return -EINVAL;
9637         case NL80211_IFTYPE_STATION:
9638         case NL80211_IFTYPE_ADHOC:
9639         case NL80211_IFTYPE_P2P_CLIENT:
9640         case NL80211_IFTYPE_AP:
9641         case NL80211_IFTYPE_AP_VLAN:
9642         case NL80211_IFTYPE_MESH_POINT:
9643         case NL80211_IFTYPE_P2P_GO:
9644                 break;
9645         case NL80211_IFTYPE_NAN:
9646         default:
9647                 return -EOPNOTSUPP;
9648         }
9649
9650         if (info->attrs[NL80211_ATTR_DURATION]) {
9651                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9652                         return -EINVAL;
9653                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9654
9655                 /*
9656                  * We should wait on the channel for at least a minimum amount
9657                  * of time (10ms) but no longer than the driver supports.
9658                  */
9659                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9660                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
9661                         return -EINVAL;
9662         }
9663
9664         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
9665
9666         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9667                 return -EINVAL;
9668
9669         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
9670
9671         /* get the channel if any has been specified, otherwise pass NULL to
9672          * the driver. The latter will use the current one
9673          */
9674         chandef.chan = NULL;
9675         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9676                 err = nl80211_parse_chandef(rdev, info, &chandef);
9677                 if (err)
9678                         return err;
9679         }
9680
9681         if (!chandef.chan && params.offchan)
9682                 return -EINVAL;
9683
9684         wdev_lock(wdev);
9685         if (params.offchan && !cfg80211_off_channel_oper_allowed(wdev)) {
9686                 wdev_unlock(wdev);
9687                 return -EBUSY;
9688         }
9689         wdev_unlock(wdev);
9690
9691         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
9692         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
9693
9694         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
9695                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9696                 int i;
9697
9698                 if (len % sizeof(u16))
9699                         return -EINVAL;
9700
9701                 params.n_csa_offsets = len / sizeof(u16);
9702                 params.csa_offsets =
9703                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9704
9705                 /* check that all the offsets fit the frame */
9706                 for (i = 0; i < params.n_csa_offsets; i++) {
9707                         if (params.csa_offsets[i] >= params.len)
9708                                 return -EINVAL;
9709                 }
9710         }
9711
9712         if (!params.dont_wait_for_ack) {
9713                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9714                 if (!msg)
9715                         return -ENOMEM;
9716
9717                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9718                                      NL80211_CMD_FRAME);
9719                 if (!hdr) {
9720                         err = -ENOBUFS;
9721                         goto free_msg;
9722                 }
9723         }
9724
9725         params.chan = chandef.chan;
9726         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
9727         if (err)
9728                 goto free_msg;
9729
9730         if (msg) {
9731                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9732                                       NL80211_ATTR_PAD))
9733                         goto nla_put_failure;
9734
9735                 genlmsg_end(msg, hdr);
9736                 return genlmsg_reply(msg, info);
9737         }
9738
9739         return 0;
9740
9741  nla_put_failure:
9742         err = -ENOBUFS;
9743  free_msg:
9744         nlmsg_free(msg);
9745         return err;
9746 }
9747
9748 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9749 {
9750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9751         struct wireless_dev *wdev = info->user_ptr[1];
9752         u64 cookie;
9753
9754         if (!info->attrs[NL80211_ATTR_COOKIE])
9755                 return -EINVAL;
9756
9757         if (!rdev->ops->mgmt_tx_cancel_wait)
9758                 return -EOPNOTSUPP;
9759
9760         switch (wdev->iftype) {
9761         case NL80211_IFTYPE_STATION:
9762         case NL80211_IFTYPE_ADHOC:
9763         case NL80211_IFTYPE_P2P_CLIENT:
9764         case NL80211_IFTYPE_AP:
9765         case NL80211_IFTYPE_AP_VLAN:
9766         case NL80211_IFTYPE_P2P_GO:
9767         case NL80211_IFTYPE_P2P_DEVICE:
9768                 break;
9769         case NL80211_IFTYPE_NAN:
9770         default:
9771                 return -EOPNOTSUPP;
9772         }
9773
9774         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9775
9776         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9777 }
9778
9779 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9780 {
9781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9782         struct wireless_dev *wdev;
9783         struct net_device *dev = info->user_ptr[1];
9784         u8 ps_state;
9785         bool state;
9786         int err;
9787
9788         if (!info->attrs[NL80211_ATTR_PS_STATE])
9789                 return -EINVAL;
9790
9791         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9792
9793         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9794                 return -EINVAL;
9795
9796         wdev = dev->ieee80211_ptr;
9797
9798         if (!rdev->ops->set_power_mgmt)
9799                 return -EOPNOTSUPP;
9800
9801         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9802
9803         if (state == wdev->ps)
9804                 return 0;
9805
9806         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9807         if (!err)
9808                 wdev->ps = state;
9809         return err;
9810 }
9811
9812 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9813 {
9814         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9815         enum nl80211_ps_state ps_state;
9816         struct wireless_dev *wdev;
9817         struct net_device *dev = info->user_ptr[1];
9818         struct sk_buff *msg;
9819         void *hdr;
9820         int err;
9821
9822         wdev = dev->ieee80211_ptr;
9823
9824         if (!rdev->ops->set_power_mgmt)
9825                 return -EOPNOTSUPP;
9826
9827         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9828         if (!msg)
9829                 return -ENOMEM;
9830
9831         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9832                              NL80211_CMD_GET_POWER_SAVE);
9833         if (!hdr) {
9834                 err = -ENOBUFS;
9835                 goto free_msg;
9836         }
9837
9838         if (wdev->ps)
9839                 ps_state = NL80211_PS_ENABLED;
9840         else
9841                 ps_state = NL80211_PS_DISABLED;
9842
9843         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9844                 goto nla_put_failure;
9845
9846         genlmsg_end(msg, hdr);
9847         return genlmsg_reply(msg, info);
9848
9849  nla_put_failure:
9850         err = -ENOBUFS;
9851  free_msg:
9852         nlmsg_free(msg);
9853         return err;
9854 }
9855
9856 static const struct nla_policy
9857 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9858         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_BINARY },
9859         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9860         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9861         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9862         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9863         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9864         [NL80211_ATTR_CQM_RSSI_LEVEL] = { .type = NLA_S32 },
9865 };
9866
9867 static int nl80211_set_cqm_txe(struct genl_info *info,
9868                                u32 rate, u32 pkts, u32 intvl)
9869 {
9870         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9871         struct net_device *dev = info->user_ptr[1];
9872         struct wireless_dev *wdev = dev->ieee80211_ptr;
9873
9874         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9875                 return -EINVAL;
9876
9877         if (!rdev->ops->set_cqm_txe_config)
9878                 return -EOPNOTSUPP;
9879
9880         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9881             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9882                 return -EOPNOTSUPP;
9883
9884         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9885 }
9886
9887 static int cfg80211_cqm_rssi_update(struct cfg80211_registered_device *rdev,
9888                                     struct net_device *dev)
9889 {
9890         struct wireless_dev *wdev = dev->ieee80211_ptr;
9891         s32 last, low, high;
9892         u32 hyst;
9893         int i, n;
9894         int err;
9895
9896         /* RSSI reporting disabled? */
9897         if (!wdev->cqm_config)
9898                 return rdev_set_cqm_rssi_range_config(rdev, dev, 0, 0);
9899
9900         /*
9901          * Obtain current RSSI value if possible, if not and no RSSI threshold
9902          * event has been received yet, we should receive an event after a
9903          * connection is established and enough beacons received to calculate
9904          * the average.
9905          */
9906         if (!wdev->cqm_config->last_rssi_event_value && wdev->current_bss &&
9907             rdev->ops->get_station) {
9908                 struct station_info sinfo = {};
9909                 u8 *mac_addr;
9910
9911                 mac_addr = wdev->current_bss->pub.bssid;
9912
9913                 err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
9914                 if (err)
9915                         return err;
9916
9917                 if (sinfo.filled & BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG))
9918                         wdev->cqm_config->last_rssi_event_value =
9919                                 (s8) sinfo.rx_beacon_signal_avg;
9920         }
9921
9922         last = wdev->cqm_config->last_rssi_event_value;
9923         hyst = wdev->cqm_config->rssi_hyst;
9924         n = wdev->cqm_config->n_rssi_thresholds;
9925
9926         for (i = 0; i < n; i++)
9927                 if (last < wdev->cqm_config->rssi_thresholds[i])
9928                         break;
9929
9930         low = i > 0 ?
9931                 (wdev->cqm_config->rssi_thresholds[i - 1] - hyst) : S32_MIN;
9932         high = i < n ?
9933                 (wdev->cqm_config->rssi_thresholds[i] + hyst - 1) : S32_MAX;
9934
9935         return rdev_set_cqm_rssi_range_config(rdev, dev, low, high);
9936 }
9937
9938 static int nl80211_set_cqm_rssi(struct genl_info *info,
9939                                 const s32 *thresholds, int n_thresholds,
9940                                 u32 hysteresis)
9941 {
9942         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9943         struct net_device *dev = info->user_ptr[1];
9944         struct wireless_dev *wdev = dev->ieee80211_ptr;
9945         int i, err;
9946         s32 prev = S32_MIN;
9947
9948         /* Check all values negative and sorted */
9949         for (i = 0; i < n_thresholds; i++) {
9950                 if (thresholds[i] > 0 || thresholds[i] <= prev)
9951                         return -EINVAL;
9952
9953                 prev = thresholds[i];
9954         }
9955
9956         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9957             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9958                 return -EOPNOTSUPP;
9959
9960         wdev_lock(wdev);
9961         cfg80211_cqm_config_free(wdev);
9962         wdev_unlock(wdev);
9963
9964         if (n_thresholds <= 1 && rdev->ops->set_cqm_rssi_config) {
9965                 if (n_thresholds == 0 || thresholds[0] == 0) /* Disabling */
9966                         return rdev_set_cqm_rssi_config(rdev, dev, 0, 0);
9967
9968                 return rdev_set_cqm_rssi_config(rdev, dev,
9969                                                 thresholds[0], hysteresis);
9970         }
9971
9972         if (!wiphy_ext_feature_isset(&rdev->wiphy,
9973                                      NL80211_EXT_FEATURE_CQM_RSSI_LIST))
9974                 return -EOPNOTSUPP;
9975
9976         if (n_thresholds == 1 && thresholds[0] == 0) /* Disabling */
9977                 n_thresholds = 0;
9978
9979         wdev_lock(wdev);
9980         if (n_thresholds) {
9981                 struct cfg80211_cqm_config *cqm_config;
9982
9983                 cqm_config = kzalloc(sizeof(struct cfg80211_cqm_config) +
9984                                      n_thresholds * sizeof(s32), GFP_KERNEL);
9985                 if (!cqm_config) {
9986                         err = -ENOMEM;
9987                         goto unlock;
9988                 }
9989
9990                 cqm_config->rssi_hyst = hysteresis;
9991                 cqm_config->n_rssi_thresholds = n_thresholds;
9992                 memcpy(cqm_config->rssi_thresholds, thresholds,
9993                        n_thresholds * sizeof(s32));
9994
9995                 wdev->cqm_config = cqm_config;
9996         }
9997
9998         err = cfg80211_cqm_rssi_update(rdev, dev);
9999
10000 unlock:
10001         wdev_unlock(wdev);
10002
10003         return err;
10004 }
10005
10006 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
10007 {
10008         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
10009         struct nlattr *cqm;
10010         int err;
10011
10012         cqm = info->attrs[NL80211_ATTR_CQM];
10013         if (!cqm)
10014                 return -EINVAL;
10015
10016         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
10017                                nl80211_attr_cqm_policy, info->extack);
10018         if (err)
10019                 return err;
10020
10021         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
10022             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
10023                 const s32 *thresholds =
10024                         nla_data(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
10025                 int len = nla_len(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
10026                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
10027
10028                 if (len % 4)
10029                         return -EINVAL;
10030
10031                 return nl80211_set_cqm_rssi(info, thresholds, len / 4,
10032                                             hysteresis);
10033         }
10034
10035         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
10036             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
10037             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
10038                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
10039                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
10040                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
10041
10042                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
10043         }
10044
10045         return -EINVAL;
10046 }
10047
10048 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
10049 {
10050         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10051         struct net_device *dev = info->user_ptr[1];
10052         struct ocb_setup setup = {};
10053         int err;
10054
10055         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
10056         if (err)
10057                 return err;
10058
10059         return cfg80211_join_ocb(rdev, dev, &setup);
10060 }
10061
10062 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
10063 {
10064         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10065         struct net_device *dev = info->user_ptr[1];
10066
10067         return cfg80211_leave_ocb(rdev, dev);
10068 }
10069
10070 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
10071 {
10072         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10073         struct net_device *dev = info->user_ptr[1];
10074         struct mesh_config cfg;
10075         struct mesh_setup setup;
10076         int err;
10077
10078         /* start with default */
10079         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
10080         memcpy(&setup, &default_mesh_setup, sizeof(setup));
10081
10082         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
10083                 /* and parse parameters if given */
10084                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
10085                 if (err)
10086                         return err;
10087         }
10088
10089         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
10090             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
10091                 return -EINVAL;
10092
10093         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
10094         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
10095
10096         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
10097             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
10098                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
10099                         return -EINVAL;
10100
10101         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
10102                 setup.beacon_interval =
10103                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
10104
10105                 err = cfg80211_validate_beacon_int(rdev,
10106                                                    NL80211_IFTYPE_MESH_POINT,
10107                                                    setup.beacon_interval);
10108                 if (err)
10109                         return err;
10110         }
10111
10112         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
10113                 setup.dtim_period =
10114                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
10115                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
10116                         return -EINVAL;
10117         }
10118
10119         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
10120                 /* parse additional setup parameters if given */
10121                 err = nl80211_parse_mesh_setup(info, &setup);
10122                 if (err)
10123                         return err;
10124         }
10125
10126         if (setup.user_mpm)
10127                 cfg.auto_open_plinks = false;
10128
10129         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
10130                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
10131                 if (err)
10132                         return err;
10133         } else {
10134                 /* __cfg80211_join_mesh() will sort it out */
10135                 setup.chandef.chan = NULL;
10136         }
10137
10138         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
10139                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
10140                 int n_rates =
10141                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
10142                 struct ieee80211_supported_band *sband;
10143
10144                 if (!setup.chandef.chan)
10145                         return -EINVAL;
10146
10147                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
10148
10149                 err = ieee80211_get_ratemask(sband, rates, n_rates,
10150                                              &setup.basic_rates);
10151                 if (err)
10152                         return err;
10153         }
10154
10155         if (info->attrs[NL80211_ATTR_TX_RATES]) {
10156                 err = nl80211_parse_tx_bitrate_mask(info, &setup.beacon_rate);
10157                 if (err)
10158                         return err;
10159
10160                 if (!setup.chandef.chan)
10161                         return -EINVAL;
10162
10163                 err = validate_beacon_tx_rate(rdev, setup.chandef.chan->band,
10164                                               &setup.beacon_rate);
10165                 if (err)
10166                         return err;
10167         }
10168
10169         setup.userspace_handles_dfs =
10170                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
10171
10172         if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) {
10173                 int r = validate_pae_over_nl80211(rdev, info);
10174
10175                 if (r < 0)
10176                         return r;
10177
10178                 setup.control_port_over_nl80211 = true;
10179         }
10180
10181         wdev_lock(dev->ieee80211_ptr);
10182         err = __cfg80211_join_mesh(rdev, dev, &setup, &cfg);
10183         if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER])
10184                 dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;
10185         wdev_unlock(dev->ieee80211_ptr);
10186
10187         return err;
10188 }
10189
10190 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
10191 {
10192         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10193         struct net_device *dev = info->user_ptr[1];
10194
10195         return cfg80211_leave_mesh(rdev, dev);
10196 }
10197
10198 #ifdef CONFIG_PM
10199 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
10200                                         struct cfg80211_registered_device *rdev)
10201 {
10202         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
10203         struct nlattr *nl_pats, *nl_pat;
10204         int i, pat_len;
10205
10206         if (!wowlan->n_patterns)
10207                 return 0;
10208
10209         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
10210         if (!nl_pats)
10211                 return -ENOBUFS;
10212
10213         for (i = 0; i < wowlan->n_patterns; i++) {
10214                 nl_pat = nla_nest_start(msg, i + 1);
10215                 if (!nl_pat)
10216                         return -ENOBUFS;
10217                 pat_len = wowlan->patterns[i].pattern_len;
10218                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
10219                             wowlan->patterns[i].mask) ||
10220                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10221                             wowlan->patterns[i].pattern) ||
10222                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10223                                 wowlan->patterns[i].pkt_offset))
10224                         return -ENOBUFS;
10225                 nla_nest_end(msg, nl_pat);
10226         }
10227         nla_nest_end(msg, nl_pats);
10228
10229         return 0;
10230 }
10231
10232 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
10233                                    struct cfg80211_wowlan_tcp *tcp)
10234 {
10235         struct nlattr *nl_tcp;
10236
10237         if (!tcp)
10238                 return 0;
10239
10240         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
10241         if (!nl_tcp)
10242                 return -ENOBUFS;
10243
10244         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
10245             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
10246             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
10247             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
10248             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
10249             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
10250                     tcp->payload_len, tcp->payload) ||
10251             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
10252                         tcp->data_interval) ||
10253             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
10254                     tcp->wake_len, tcp->wake_data) ||
10255             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
10256                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
10257                 return -ENOBUFS;
10258
10259         if (tcp->payload_seq.len &&
10260             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
10261                     sizeof(tcp->payload_seq), &tcp->payload_seq))
10262                 return -ENOBUFS;
10263
10264         if (tcp->payload_tok.len &&
10265             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
10266                     sizeof(tcp->payload_tok) + tcp->tokens_size,
10267                     &tcp->payload_tok))
10268                 return -ENOBUFS;
10269
10270         nla_nest_end(msg, nl_tcp);
10271
10272         return 0;
10273 }
10274
10275 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
10276                                   struct cfg80211_sched_scan_request *req)
10277 {
10278         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
10279         int i;
10280
10281         if (!req)
10282                 return 0;
10283
10284         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
10285         if (!nd)
10286                 return -ENOBUFS;
10287
10288         if (req->n_scan_plans == 1 &&
10289             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
10290                         req->scan_plans[0].interval * 1000))
10291                 return -ENOBUFS;
10292
10293         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
10294                 return -ENOBUFS;
10295
10296         if (req->relative_rssi_set) {
10297                 struct nl80211_bss_select_rssi_adjust rssi_adjust;
10298
10299                 if (nla_put_s8(msg, NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI,
10300                                req->relative_rssi))
10301                         return -ENOBUFS;
10302
10303                 rssi_adjust.band = req->rssi_adjust.band;
10304                 rssi_adjust.delta = req->rssi_adjust.delta;
10305                 if (nla_put(msg, NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST,
10306                             sizeof(rssi_adjust), &rssi_adjust))
10307                         return -ENOBUFS;
10308         }
10309
10310         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10311         if (!freqs)
10312                 return -ENOBUFS;
10313
10314         for (i = 0; i < req->n_channels; i++) {
10315                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10316                         return -ENOBUFS;
10317         }
10318
10319         nla_nest_end(msg, freqs);
10320
10321         if (req->n_match_sets) {
10322                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
10323                 if (!matches)
10324                         return -ENOBUFS;
10325
10326                 for (i = 0; i < req->n_match_sets; i++) {
10327                         match = nla_nest_start(msg, i);
10328                         if (!match)
10329                                 return -ENOBUFS;
10330
10331                         if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
10332                                     req->match_sets[i].ssid.ssid_len,
10333                                     req->match_sets[i].ssid.ssid))
10334                                 return -ENOBUFS;
10335                         nla_nest_end(msg, match);
10336                 }
10337                 nla_nest_end(msg, matches);
10338         }
10339
10340         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
10341         if (!scan_plans)
10342                 return -ENOBUFS;
10343
10344         for (i = 0; i < req->n_scan_plans; i++) {
10345                 scan_plan = nla_nest_start(msg, i + 1);
10346                 if (!scan_plan)
10347                         return -ENOBUFS;
10348
10349                 if (!scan_plan ||
10350                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
10351                                 req->scan_plans[i].interval) ||
10352                     (req->scan_plans[i].iterations &&
10353                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
10354                                  req->scan_plans[i].iterations)))
10355                         return -ENOBUFS;
10356                 nla_nest_end(msg, scan_plan);
10357         }
10358         nla_nest_end(msg, scan_plans);
10359
10360         nla_nest_end(msg, nd);
10361
10362         return 0;
10363 }
10364
10365 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
10366 {
10367         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10368         struct sk_buff *msg;
10369         void *hdr;
10370         u32 size = NLMSG_DEFAULT_SIZE;
10371
10372         if (!rdev->wiphy.wowlan)
10373                 return -EOPNOTSUPP;
10374
10375         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
10376                 /* adjust size to have room for all the data */
10377                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
10378                         rdev->wiphy.wowlan_config->tcp->payload_len +
10379                         rdev->wiphy.wowlan_config->tcp->wake_len +
10380                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
10381         }
10382
10383         msg = nlmsg_new(size, GFP_KERNEL);
10384         if (!msg)
10385                 return -ENOMEM;
10386
10387         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10388                              NL80211_CMD_GET_WOWLAN);
10389         if (!hdr)
10390                 goto nla_put_failure;
10391
10392         if (rdev->wiphy.wowlan_config) {
10393                 struct nlattr *nl_wowlan;
10394
10395                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10396                 if (!nl_wowlan)
10397                         goto nla_put_failure;
10398
10399                 if ((rdev->wiphy.wowlan_config->any &&
10400                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
10401                     (rdev->wiphy.wowlan_config->disconnect &&
10402                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
10403                     (rdev->wiphy.wowlan_config->magic_pkt &&
10404                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
10405                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
10406                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
10407                     (rdev->wiphy.wowlan_config->eap_identity_req &&
10408                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
10409                     (rdev->wiphy.wowlan_config->four_way_handshake &&
10410                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
10411                     (rdev->wiphy.wowlan_config->rfkill_release &&
10412                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
10413                         goto nla_put_failure;
10414
10415                 if (nl80211_send_wowlan_patterns(msg, rdev))
10416                         goto nla_put_failure;
10417
10418                 if (nl80211_send_wowlan_tcp(msg,
10419                                             rdev->wiphy.wowlan_config->tcp))
10420                         goto nla_put_failure;
10421
10422                 if (nl80211_send_wowlan_nd(
10423                             msg,
10424                             rdev->wiphy.wowlan_config->nd_config))
10425                         goto nla_put_failure;
10426
10427                 nla_nest_end(msg, nl_wowlan);
10428         }
10429
10430         genlmsg_end(msg, hdr);
10431         return genlmsg_reply(msg, info);
10432
10433 nla_put_failure:
10434         nlmsg_free(msg);
10435         return -ENOBUFS;
10436 }
10437
10438 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
10439                                     struct nlattr *attr,
10440                                     struct cfg80211_wowlan *trig)
10441 {
10442         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
10443         struct cfg80211_wowlan_tcp *cfg;
10444         struct nl80211_wowlan_tcp_data_token *tok = NULL;
10445         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
10446         u32 size;
10447         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
10448         int err, port;
10449
10450         if (!rdev->wiphy.wowlan->tcp)
10451                 return -EINVAL;
10452
10453         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TCP, attr,
10454                                nl80211_wowlan_tcp_policy, NULL);
10455         if (err)
10456                 return err;
10457
10458         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
10459             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
10460             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
10461             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
10462             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
10463             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
10464             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
10465             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
10466                 return -EINVAL;
10467
10468         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
10469         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
10470                 return -EINVAL;
10471
10472         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
10473                         rdev->wiphy.wowlan->tcp->data_interval_max ||
10474             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
10475                 return -EINVAL;
10476
10477         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
10478         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
10479                 return -EINVAL;
10480
10481         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
10482         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
10483                 return -EINVAL;
10484
10485         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
10486                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
10487
10488                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
10489                 tokens_size = tokln - sizeof(*tok);
10490
10491                 if (!tok->len || tokens_size % tok->len)
10492                         return -EINVAL;
10493                 if (!rdev->wiphy.wowlan->tcp->tok)
10494                         return -EINVAL;
10495                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
10496                         return -EINVAL;
10497                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
10498                         return -EINVAL;
10499                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
10500                         return -EINVAL;
10501                 if (tok->offset + tok->len > data_size)
10502                         return -EINVAL;
10503         }
10504
10505         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
10506                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
10507                 if (!rdev->wiphy.wowlan->tcp->seq)
10508                         return -EINVAL;
10509                 if (seq->len == 0 || seq->len > 4)
10510                         return -EINVAL;
10511                 if (seq->len + seq->offset > data_size)
10512                         return -EINVAL;
10513         }
10514
10515         size = sizeof(*cfg);
10516         size += data_size;
10517         size += wake_size + wake_mask_size;
10518         size += tokens_size;
10519
10520         cfg = kzalloc(size, GFP_KERNEL);
10521         if (!cfg)
10522                 return -ENOMEM;
10523         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
10524         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
10525         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
10526                ETH_ALEN);
10527         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
10528                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
10529         else
10530                 port = 0;
10531 #ifdef CONFIG_INET
10532         /* allocate a socket and port for it and use it */
10533         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
10534                             IPPROTO_TCP, &cfg->sock, 1);
10535         if (err) {
10536                 kfree(cfg);
10537                 return err;
10538         }
10539         if (inet_csk_get_port(cfg->sock->sk, port)) {
10540                 sock_release(cfg->sock);
10541                 kfree(cfg);
10542                 return -EADDRINUSE;
10543         }
10544         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
10545 #else
10546         if (!port) {
10547                 kfree(cfg);
10548                 return -EINVAL;
10549         }
10550         cfg->src_port = port;
10551 #endif
10552
10553         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
10554         cfg->payload_len = data_size;
10555         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
10556         memcpy((void *)cfg->payload,
10557                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
10558                data_size);
10559         if (seq)
10560                 cfg->payload_seq = *seq;
10561         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
10562         cfg->wake_len = wake_size;
10563         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
10564         memcpy((void *)cfg->wake_data,
10565                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
10566                wake_size);
10567         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
10568                          data_size + wake_size;
10569         memcpy((void *)cfg->wake_mask,
10570                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
10571                wake_mask_size);
10572         if (tok) {
10573                 cfg->tokens_size = tokens_size;
10574                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
10575         }
10576
10577         trig->tcp = cfg;
10578
10579         return 0;
10580 }
10581
10582 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
10583                                    const struct wiphy_wowlan_support *wowlan,
10584                                    struct nlattr *attr,
10585                                    struct cfg80211_wowlan *trig)
10586 {
10587         struct nlattr **tb;
10588         int err;
10589
10590         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
10591         if (!tb)
10592                 return -ENOMEM;
10593
10594         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
10595                 err = -EOPNOTSUPP;
10596                 goto out;
10597         }
10598
10599         err = nla_parse_nested(tb, NL80211_ATTR_MAX, attr, nl80211_policy,
10600                                NULL);
10601         if (err)
10602                 goto out;
10603
10604         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb,
10605                                                    wowlan->max_nd_match_sets);
10606         err = PTR_ERR_OR_ZERO(trig->nd_config);
10607         if (err)
10608                 trig->nd_config = NULL;
10609
10610 out:
10611         kfree(tb);
10612         return err;
10613 }
10614
10615 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
10616 {
10617         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10618         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
10619         struct cfg80211_wowlan new_triggers = {};
10620         struct cfg80211_wowlan *ntrig;
10621         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
10622         int err, i;
10623         bool prev_enabled = rdev->wiphy.wowlan_config;
10624         bool regular = false;
10625
10626         if (!wowlan)
10627                 return -EOPNOTSUPP;
10628
10629         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
10630                 cfg80211_rdev_free_wowlan(rdev);
10631                 rdev->wiphy.wowlan_config = NULL;
10632                 goto set_wakeup;
10633         }
10634
10635         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TRIG,
10636                                info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS],
10637                                nl80211_wowlan_policy, info->extack);
10638         if (err)
10639                 return err;
10640
10641         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
10642                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
10643                         return -EINVAL;
10644                 new_triggers.any = true;
10645         }
10646
10647         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
10648                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
10649                         return -EINVAL;
10650                 new_triggers.disconnect = true;
10651                 regular = true;
10652         }
10653
10654         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
10655                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
10656                         return -EINVAL;
10657                 new_triggers.magic_pkt = true;
10658                 regular = true;
10659         }
10660
10661         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
10662                 return -EINVAL;
10663
10664         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
10665                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
10666                         return -EINVAL;
10667                 new_triggers.gtk_rekey_failure = true;
10668                 regular = true;
10669         }
10670
10671         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
10672                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
10673                         return -EINVAL;
10674                 new_triggers.eap_identity_req = true;
10675                 regular = true;
10676         }
10677
10678         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
10679                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
10680                         return -EINVAL;
10681                 new_triggers.four_way_handshake = true;
10682                 regular = true;
10683         }
10684
10685         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
10686                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
10687                         return -EINVAL;
10688                 new_triggers.rfkill_release = true;
10689                 regular = true;
10690         }
10691
10692         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
10693                 struct nlattr *pat;
10694                 int n_patterns = 0;
10695                 int rem, pat_len, mask_len, pkt_offset;
10696                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10697
10698                 regular = true;
10699
10700                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10701                                     rem)
10702                         n_patterns++;
10703                 if (n_patterns > wowlan->n_patterns)
10704                         return -EINVAL;
10705
10706                 new_triggers.patterns = kcalloc(n_patterns,
10707                                                 sizeof(new_triggers.patterns[0]),
10708                                                 GFP_KERNEL);
10709                 if (!new_triggers.patterns)
10710                         return -ENOMEM;
10711
10712                 new_triggers.n_patterns = n_patterns;
10713                 i = 0;
10714
10715                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10716                                     rem) {
10717                         u8 *mask_pat;
10718
10719                         nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
10720                                          nl80211_packet_pattern_policy,
10721                                          info->extack);
10722                         err = -EINVAL;
10723                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
10724                             !pat_tb[NL80211_PKTPAT_PATTERN])
10725                                 goto error;
10726                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10727                         mask_len = DIV_ROUND_UP(pat_len, 8);
10728                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10729                                 goto error;
10730                         if (pat_len > wowlan->pattern_max_len ||
10731                             pat_len < wowlan->pattern_min_len)
10732                                 goto error;
10733
10734                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
10735                                 pkt_offset = 0;
10736                         else
10737                                 pkt_offset = nla_get_u32(
10738                                         pat_tb[NL80211_PKTPAT_OFFSET]);
10739                         if (pkt_offset > wowlan->max_pkt_offset)
10740                                 goto error;
10741                         new_triggers.patterns[i].pkt_offset = pkt_offset;
10742
10743                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10744                         if (!mask_pat) {
10745                                 err = -ENOMEM;
10746                                 goto error;
10747                         }
10748                         new_triggers.patterns[i].mask = mask_pat;
10749                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10750                                mask_len);
10751                         mask_pat += mask_len;
10752                         new_triggers.patterns[i].pattern = mask_pat;
10753                         new_triggers.patterns[i].pattern_len = pat_len;
10754                         memcpy(mask_pat,
10755                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10756                                pat_len);
10757                         i++;
10758                 }
10759         }
10760
10761         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
10762                 regular = true;
10763                 err = nl80211_parse_wowlan_tcp(
10764                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
10765                         &new_triggers);
10766                 if (err)
10767                         goto error;
10768         }
10769
10770         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
10771                 regular = true;
10772                 err = nl80211_parse_wowlan_nd(
10773                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
10774                         &new_triggers);
10775                 if (err)
10776                         goto error;
10777         }
10778
10779         /* The 'any' trigger means the device continues operating more or less
10780          * as in its normal operation mode and wakes up the host on most of the
10781          * normal interrupts (like packet RX, ...)
10782          * It therefore makes little sense to combine with the more constrained
10783          * wakeup trigger modes.
10784          */
10785         if (new_triggers.any && regular) {
10786                 err = -EINVAL;
10787                 goto error;
10788         }
10789
10790         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
10791         if (!ntrig) {
10792                 err = -ENOMEM;
10793                 goto error;
10794         }
10795         cfg80211_rdev_free_wowlan(rdev);
10796         rdev->wiphy.wowlan_config = ntrig;
10797
10798  set_wakeup:
10799         if (rdev->ops->set_wakeup &&
10800             prev_enabled != !!rdev->wiphy.wowlan_config)
10801                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
10802
10803         return 0;
10804  error:
10805         for (i = 0; i < new_triggers.n_patterns; i++)
10806                 kfree(new_triggers.patterns[i].mask);
10807         kfree(new_triggers.patterns);
10808         if (new_triggers.tcp && new_triggers.tcp->sock)
10809                 sock_release(new_triggers.tcp->sock);
10810         kfree(new_triggers.tcp);
10811         kfree(new_triggers.nd_config);
10812         return err;
10813 }
10814 #endif
10815
10816 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
10817                                        struct cfg80211_registered_device *rdev)
10818 {
10819         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
10820         int i, j, pat_len;
10821         struct cfg80211_coalesce_rules *rule;
10822
10823         if (!rdev->coalesce->n_rules)
10824                 return 0;
10825
10826         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
10827         if (!nl_rules)
10828                 return -ENOBUFS;
10829
10830         for (i = 0; i < rdev->coalesce->n_rules; i++) {
10831                 nl_rule = nla_nest_start(msg, i + 1);
10832                 if (!nl_rule)
10833                         return -ENOBUFS;
10834
10835                 rule = &rdev->coalesce->rules[i];
10836                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
10837                                 rule->delay))
10838                         return -ENOBUFS;
10839
10840                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
10841                                 rule->condition))
10842                         return -ENOBUFS;
10843
10844                 nl_pats = nla_nest_start(msg,
10845                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
10846                 if (!nl_pats)
10847                         return -ENOBUFS;
10848
10849                 for (j = 0; j < rule->n_patterns; j++) {
10850                         nl_pat = nla_nest_start(msg, j + 1);
10851                         if (!nl_pat)
10852                                 return -ENOBUFS;
10853                         pat_len = rule->patterns[j].pattern_len;
10854                         if (nla_put(msg, NL80211_PKTPAT_MASK,
10855                                     DIV_ROUND_UP(pat_len, 8),
10856                                     rule->patterns[j].mask) ||
10857                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10858                                     rule->patterns[j].pattern) ||
10859                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10860                                         rule->patterns[j].pkt_offset))
10861                                 return -ENOBUFS;
10862                         nla_nest_end(msg, nl_pat);
10863                 }
10864                 nla_nest_end(msg, nl_pats);
10865                 nla_nest_end(msg, nl_rule);
10866         }
10867         nla_nest_end(msg, nl_rules);
10868
10869         return 0;
10870 }
10871
10872 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
10873 {
10874         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10875         struct sk_buff *msg;
10876         void *hdr;
10877
10878         if (!rdev->wiphy.coalesce)
10879                 return -EOPNOTSUPP;
10880
10881         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10882         if (!msg)
10883                 return -ENOMEM;
10884
10885         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10886                              NL80211_CMD_GET_COALESCE);
10887         if (!hdr)
10888                 goto nla_put_failure;
10889
10890         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
10891                 goto nla_put_failure;
10892
10893         genlmsg_end(msg, hdr);
10894         return genlmsg_reply(msg, info);
10895
10896 nla_put_failure:
10897         nlmsg_free(msg);
10898         return -ENOBUFS;
10899 }
10900
10901 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
10902 {
10903         struct cfg80211_coalesce *coalesce = rdev->coalesce;
10904         int i, j;
10905         struct cfg80211_coalesce_rules *rule;
10906
10907         if (!coalesce)
10908                 return;
10909
10910         for (i = 0; i < coalesce->n_rules; i++) {
10911                 rule = &coalesce->rules[i];
10912                 for (j = 0; j < rule->n_patterns; j++)
10913                         kfree(rule->patterns[j].mask);
10914                 kfree(rule->patterns);
10915         }
10916         kfree(coalesce->rules);
10917         kfree(coalesce);
10918         rdev->coalesce = NULL;
10919 }
10920
10921 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10922                                        struct nlattr *rule,
10923                                        struct cfg80211_coalesce_rules *new_rule)
10924 {
10925         int err, i;
10926         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10927         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10928         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10929         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10930
10931         err = nla_parse_nested(tb, NL80211_ATTR_COALESCE_RULE_MAX, rule,
10932                                nl80211_coalesce_policy, NULL);
10933         if (err)
10934                 return err;
10935
10936         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10937                 new_rule->delay =
10938                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10939         if (new_rule->delay > coalesce->max_delay)
10940                 return -EINVAL;
10941
10942         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10943                 new_rule->condition =
10944                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10945         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10946             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10947                 return -EINVAL;
10948
10949         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10950                 return -EINVAL;
10951
10952         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10953                             rem)
10954                 n_patterns++;
10955         if (n_patterns > coalesce->n_patterns)
10956                 return -EINVAL;
10957
10958         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10959                                      GFP_KERNEL);
10960         if (!new_rule->patterns)
10961                 return -ENOMEM;
10962
10963         new_rule->n_patterns = n_patterns;
10964         i = 0;
10965
10966         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10967                             rem) {
10968                 u8 *mask_pat;
10969
10970                 nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
10971                                  nl80211_packet_pattern_policy, NULL);
10972                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10973                     !pat_tb[NL80211_PKTPAT_PATTERN])
10974                         return -EINVAL;
10975                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10976                 mask_len = DIV_ROUND_UP(pat_len, 8);
10977                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10978                         return -EINVAL;
10979                 if (pat_len > coalesce->pattern_max_len ||
10980                     pat_len < coalesce->pattern_min_len)
10981                         return -EINVAL;
10982
10983                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10984                         pkt_offset = 0;
10985                 else
10986                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10987                 if (pkt_offset > coalesce->max_pkt_offset)
10988                         return -EINVAL;
10989                 new_rule->patterns[i].pkt_offset = pkt_offset;
10990
10991                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10992                 if (!mask_pat)
10993                         return -ENOMEM;
10994
10995                 new_rule->patterns[i].mask = mask_pat;
10996                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10997                        mask_len);
10998
10999                 mask_pat += mask_len;
11000                 new_rule->patterns[i].pattern = mask_pat;
11001                 new_rule->patterns[i].pattern_len = pat_len;
11002                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
11003                        pat_len);
11004                 i++;
11005         }
11006
11007         return 0;
11008 }
11009
11010 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
11011 {
11012         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11013         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
11014         struct cfg80211_coalesce new_coalesce = {};
11015         struct cfg80211_coalesce *n_coalesce;
11016         int err, rem_rule, n_rules = 0, i, j;
11017         struct nlattr *rule;
11018         struct cfg80211_coalesce_rules *tmp_rule;
11019
11020         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
11021                 return -EOPNOTSUPP;
11022
11023         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
11024                 cfg80211_rdev_free_coalesce(rdev);
11025                 rdev_set_coalesce(rdev, NULL);
11026                 return 0;
11027         }
11028
11029         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
11030                             rem_rule)
11031                 n_rules++;
11032         if (n_rules > coalesce->n_rules)
11033                 return -EINVAL;
11034
11035         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
11036                                      GFP_KERNEL);
11037         if (!new_coalesce.rules)
11038                 return -ENOMEM;
11039
11040         new_coalesce.n_rules = n_rules;
11041         i = 0;
11042
11043         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
11044                             rem_rule) {
11045                 err = nl80211_parse_coalesce_rule(rdev, rule,
11046                                                   &new_coalesce.rules[i]);
11047                 if (err)
11048                         goto error;
11049
11050                 i++;
11051         }
11052
11053         err = rdev_set_coalesce(rdev, &new_coalesce);
11054         if (err)
11055                 goto error;
11056
11057         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
11058         if (!n_coalesce) {
11059                 err = -ENOMEM;
11060                 goto error;
11061         }
11062         cfg80211_rdev_free_coalesce(rdev);
11063         rdev->coalesce = n_coalesce;
11064
11065         return 0;
11066 error:
11067         for (i = 0; i < new_coalesce.n_rules; i++) {
11068                 tmp_rule = &new_coalesce.rules[i];
11069                 for (j = 0; j < tmp_rule->n_patterns; j++)
11070                         kfree(tmp_rule->patterns[j].mask);
11071                 kfree(tmp_rule->patterns);
11072         }
11073         kfree(new_coalesce.rules);
11074
11075         return err;
11076 }
11077
11078 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
11079 {
11080         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11081         struct net_device *dev = info->user_ptr[1];
11082         struct wireless_dev *wdev = dev->ieee80211_ptr;
11083         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
11084         struct cfg80211_gtk_rekey_data rekey_data;
11085         int err;
11086
11087         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
11088                 return -EINVAL;
11089
11090         err = nla_parse_nested(tb, MAX_NL80211_REKEY_DATA,
11091                                info->attrs[NL80211_ATTR_REKEY_DATA],
11092                                nl80211_rekey_policy, info->extack);
11093         if (err)
11094                 return err;
11095
11096         if (!tb[NL80211_REKEY_DATA_REPLAY_CTR] || !tb[NL80211_REKEY_DATA_KEK] ||
11097             !tb[NL80211_REKEY_DATA_KCK])
11098                 return -EINVAL;
11099         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
11100                 return -ERANGE;
11101         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
11102                 return -ERANGE;
11103         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
11104                 return -ERANGE;
11105
11106         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
11107         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
11108         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
11109
11110         wdev_lock(wdev);
11111         if (!wdev->current_bss) {
11112                 err = -ENOTCONN;
11113                 goto out;
11114         }
11115
11116         if (!rdev->ops->set_rekey_data) {
11117                 err = -EOPNOTSUPP;
11118                 goto out;
11119         }
11120
11121         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
11122  out:
11123         wdev_unlock(wdev);
11124         return err;
11125 }
11126
11127 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
11128                                              struct genl_info *info)
11129 {
11130         struct net_device *dev = info->user_ptr[1];
11131         struct wireless_dev *wdev = dev->ieee80211_ptr;
11132
11133         if (wdev->iftype != NL80211_IFTYPE_AP &&
11134             wdev->iftype != NL80211_IFTYPE_P2P_GO)
11135                 return -EINVAL;
11136
11137         if (wdev->ap_unexpected_nlportid)
11138                 return -EBUSY;
11139
11140         wdev->ap_unexpected_nlportid = info->snd_portid;
11141         return 0;
11142 }
11143
11144 static int nl80211_probe_client(struct sk_buff *skb,
11145                                 struct genl_info *info)
11146 {
11147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11148         struct net_device *dev = info->user_ptr[1];
11149         struct wireless_dev *wdev = dev->ieee80211_ptr;
11150         struct sk_buff *msg;
11151         void *hdr;
11152         const u8 *addr;
11153         u64 cookie;
11154         int err;
11155
11156         if (wdev->iftype != NL80211_IFTYPE_AP &&
11157             wdev->iftype != NL80211_IFTYPE_P2P_GO)
11158                 return -EOPNOTSUPP;
11159
11160         if (!info->attrs[NL80211_ATTR_MAC])
11161                 return -EINVAL;
11162
11163         if (!rdev->ops->probe_client)
11164                 return -EOPNOTSUPP;
11165
11166         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11167         if (!msg)
11168                 return -ENOMEM;
11169
11170         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11171                              NL80211_CMD_PROBE_CLIENT);
11172         if (!hdr) {
11173                 err = -ENOBUFS;
11174                 goto free_msg;
11175         }
11176
11177         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11178
11179         err = rdev_probe_client(rdev, dev, addr, &cookie);
11180         if (err)
11181                 goto free_msg;
11182
11183         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
11184                               NL80211_ATTR_PAD))
11185                 goto nla_put_failure;
11186
11187         genlmsg_end(msg, hdr);
11188
11189         return genlmsg_reply(msg, info);
11190
11191  nla_put_failure:
11192         err = -ENOBUFS;
11193  free_msg:
11194         nlmsg_free(msg);
11195         return err;
11196 }
11197
11198 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
11199 {
11200         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11201         struct cfg80211_beacon_registration *reg, *nreg;
11202         int rv;
11203
11204         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
11205                 return -EOPNOTSUPP;
11206
11207         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
11208         if (!nreg)
11209                 return -ENOMEM;
11210
11211         /* First, check if already registered. */
11212         spin_lock_bh(&rdev->beacon_registrations_lock);
11213         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11214                 if (reg->nlportid == info->snd_portid) {
11215                         rv = -EALREADY;
11216                         goto out_err;
11217                 }
11218         }
11219         /* Add it to the list */
11220         nreg->nlportid = info->snd_portid;
11221         list_add(&nreg->list, &rdev->beacon_registrations);
11222
11223         spin_unlock_bh(&rdev->beacon_registrations_lock);
11224
11225         return 0;
11226 out_err:
11227         spin_unlock_bh(&rdev->beacon_registrations_lock);
11228         kfree(nreg);
11229         return rv;
11230 }
11231
11232 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
11233 {
11234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11235         struct wireless_dev *wdev = info->user_ptr[1];
11236         int err;
11237
11238         if (!rdev->ops->start_p2p_device)
11239                 return -EOPNOTSUPP;
11240
11241         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
11242                 return -EOPNOTSUPP;
11243
11244         if (wdev_running(wdev))
11245                 return 0;
11246
11247         if (rfkill_blocked(rdev->rfkill))
11248                 return -ERFKILL;
11249
11250         err = rdev_start_p2p_device(rdev, wdev);
11251         if (err)
11252                 return err;
11253
11254         wdev->is_running = true;
11255         rdev->opencount++;
11256
11257         return 0;
11258 }
11259
11260 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
11261 {
11262         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11263         struct wireless_dev *wdev = info->user_ptr[1];
11264
11265         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
11266                 return -EOPNOTSUPP;
11267
11268         if (!rdev->ops->stop_p2p_device)
11269                 return -EOPNOTSUPP;
11270
11271         cfg80211_stop_p2p_device(rdev, wdev);
11272
11273         return 0;
11274 }
11275
11276 static int nl80211_start_nan(struct sk_buff *skb, struct genl_info *info)
11277 {
11278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11279         struct wireless_dev *wdev = info->user_ptr[1];
11280         struct cfg80211_nan_conf conf = {};
11281         int err;
11282
11283         if (wdev->iftype != NL80211_IFTYPE_NAN)
11284                 return -EOPNOTSUPP;
11285
11286         if (wdev_running(wdev))
11287                 return -EEXIST;
11288
11289         if (rfkill_blocked(rdev->rfkill))
11290                 return -ERFKILL;
11291
11292         if (!info->attrs[NL80211_ATTR_NAN_MASTER_PREF])
11293                 return -EINVAL;
11294
11295         conf.master_pref =
11296                 nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
11297         if (!conf.master_pref)
11298                 return -EINVAL;
11299
11300         if (info->attrs[NL80211_ATTR_BANDS]) {
11301                 u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);
11302
11303                 if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
11304                         return -EOPNOTSUPP;
11305
11306                 if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
11307                         return -EINVAL;
11308
11309                 conf.bands = bands;
11310         }
11311
11312         err = rdev_start_nan(rdev, wdev, &conf);
11313         if (err)
11314                 return err;
11315
11316         wdev->is_running = true;
11317         rdev->opencount++;
11318
11319         return 0;
11320 }
11321
11322 static int nl80211_stop_nan(struct sk_buff *skb, struct genl_info *info)
11323 {
11324         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11325         struct wireless_dev *wdev = info->user_ptr[1];
11326
11327         if (wdev->iftype != NL80211_IFTYPE_NAN)
11328                 return -EOPNOTSUPP;
11329
11330         cfg80211_stop_nan(rdev, wdev);
11331
11332         return 0;
11333 }
11334
11335 static int validate_nan_filter(struct nlattr *filter_attr)
11336 {
11337         struct nlattr *attr;
11338         int len = 0, n_entries = 0, rem;
11339
11340         nla_for_each_nested(attr, filter_attr, rem) {
11341                 len += nla_len(attr);
11342                 n_entries++;
11343         }
11344
11345         if (len >= U8_MAX)
11346                 return -EINVAL;
11347
11348         return n_entries;
11349 }
11350
11351 static int handle_nan_filter(struct nlattr *attr_filter,
11352                              struct cfg80211_nan_func *func,
11353                              bool tx)
11354 {
11355         struct nlattr *attr;
11356         int n_entries, rem, i;
11357         struct cfg80211_nan_func_filter *filter;
11358
11359         n_entries = validate_nan_filter(attr_filter);
11360         if (n_entries < 0)
11361                 return n_entries;
11362
11363         BUILD_BUG_ON(sizeof(*func->rx_filters) != sizeof(*func->tx_filters));
11364
11365         filter = kcalloc(n_entries, sizeof(*func->rx_filters), GFP_KERNEL);
11366         if (!filter)
11367                 return -ENOMEM;
11368
11369         i = 0;
11370         nla_for_each_nested(attr, attr_filter, rem) {
11371                 filter[i].filter = nla_memdup(attr, GFP_KERNEL);
11372                 filter[i].len = nla_len(attr);
11373                 i++;
11374         }
11375         if (tx) {
11376                 func->num_tx_filters = n_entries;
11377                 func->tx_filters = filter;
11378         } else {
11379                 func->num_rx_filters = n_entries;
11380                 func->rx_filters = filter;
11381         }
11382
11383         return 0;
11384 }
11385
11386 static int nl80211_nan_add_func(struct sk_buff *skb,
11387                                 struct genl_info *info)
11388 {
11389         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11390         struct wireless_dev *wdev = info->user_ptr[1];
11391         struct nlattr *tb[NUM_NL80211_NAN_FUNC_ATTR], *func_attr;
11392         struct cfg80211_nan_func *func;
11393         struct sk_buff *msg = NULL;
11394         void *hdr = NULL;
11395         int err = 0;
11396
11397         if (wdev->iftype != NL80211_IFTYPE_NAN)
11398                 return -EOPNOTSUPP;
11399
11400         if (!wdev_running(wdev))
11401                 return -ENOTCONN;
11402
11403         if (!info->attrs[NL80211_ATTR_NAN_FUNC])
11404                 return -EINVAL;
11405
11406         err = nla_parse_nested(tb, NL80211_NAN_FUNC_ATTR_MAX,
11407                                info->attrs[NL80211_ATTR_NAN_FUNC],
11408                                nl80211_nan_func_policy, info->extack);
11409         if (err)
11410                 return err;
11411
11412         func = kzalloc(sizeof(*func), GFP_KERNEL);
11413         if (!func)
11414                 return -ENOMEM;
11415
11416         func->cookie = wdev->wiphy->cookie_counter++;
11417
11418         if (!tb[NL80211_NAN_FUNC_TYPE] ||
11419             nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]) > NL80211_NAN_FUNC_MAX_TYPE) {
11420                 err = -EINVAL;
11421                 goto out;
11422         }
11423
11424
11425         func->type = nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]);
11426
11427         if (!tb[NL80211_NAN_FUNC_SERVICE_ID]) {
11428                 err = -EINVAL;
11429                 goto out;
11430         }
11431
11432         memcpy(func->service_id, nla_data(tb[NL80211_NAN_FUNC_SERVICE_ID]),
11433                sizeof(func->service_id));
11434
11435         func->close_range =
11436                 nla_get_flag(tb[NL80211_NAN_FUNC_CLOSE_RANGE]);
11437
11438         if (tb[NL80211_NAN_FUNC_SERVICE_INFO]) {
11439                 func->serv_spec_info_len =
11440                         nla_len(tb[NL80211_NAN_FUNC_SERVICE_INFO]);
11441                 func->serv_spec_info =
11442                         kmemdup(nla_data(tb[NL80211_NAN_FUNC_SERVICE_INFO]),
11443                                 func->serv_spec_info_len,
11444                                 GFP_KERNEL);
11445                 if (!func->serv_spec_info) {
11446                         err = -ENOMEM;
11447                         goto out;
11448                 }
11449         }
11450
11451         if (tb[NL80211_NAN_FUNC_TTL])
11452                 func->ttl = nla_get_u32(tb[NL80211_NAN_FUNC_TTL]);
11453
11454         switch (func->type) {
11455         case NL80211_NAN_FUNC_PUBLISH:
11456                 if (!tb[NL80211_NAN_FUNC_PUBLISH_TYPE]) {
11457                         err = -EINVAL;
11458                         goto out;
11459                 }
11460
11461                 func->publish_type =
11462                         nla_get_u8(tb[NL80211_NAN_FUNC_PUBLISH_TYPE]);
11463                 func->publish_bcast =
11464                         nla_get_flag(tb[NL80211_NAN_FUNC_PUBLISH_BCAST]);
11465
11466                 if ((!(func->publish_type & NL80211_NAN_SOLICITED_PUBLISH)) &&
11467                         func->publish_bcast) {
11468                         err = -EINVAL;
11469                         goto out;
11470                 }
11471                 break;
11472         case NL80211_NAN_FUNC_SUBSCRIBE:
11473                 func->subscribe_active =
11474                         nla_get_flag(tb[NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE]);
11475                 break;
11476         case NL80211_NAN_FUNC_FOLLOW_UP:
11477                 if (!tb[NL80211_NAN_FUNC_FOLLOW_UP_ID] ||
11478                     !tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] ||
11479                     !tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]) {
11480                         err = -EINVAL;
11481                         goto out;
11482                 }
11483
11484                 func->followup_id =
11485                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_ID]);
11486                 func->followup_reqid =
11487                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]);
11488                 memcpy(func->followup_dest.addr,
11489                        nla_data(tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]),
11490                        sizeof(func->followup_dest.addr));
11491                 if (func->ttl) {
11492                         err = -EINVAL;
11493                         goto out;
11494                 }
11495                 break;
11496         default:
11497                 err = -EINVAL;
11498                 goto out;
11499         }
11500
11501         if (tb[NL80211_NAN_FUNC_SRF]) {
11502                 struct nlattr *srf_tb[NUM_NL80211_NAN_SRF_ATTR];
11503
11504                 err = nla_parse_nested(srf_tb, NL80211_NAN_SRF_ATTR_MAX,
11505                                        tb[NL80211_NAN_FUNC_SRF],
11506                                        nl80211_nan_srf_policy, info->extack);
11507                 if (err)
11508                         goto out;
11509
11510                 func->srf_include =
11511                         nla_get_flag(srf_tb[NL80211_NAN_SRF_INCLUDE]);
11512
11513                 if (srf_tb[NL80211_NAN_SRF_BF]) {
11514                         if (srf_tb[NL80211_NAN_SRF_MAC_ADDRS] ||
11515                             !srf_tb[NL80211_NAN_SRF_BF_IDX]) {
11516                                 err = -EINVAL;
11517                                 goto out;
11518                         }
11519
11520                         func->srf_bf_len =
11521                                 nla_len(srf_tb[NL80211_NAN_SRF_BF]);
11522                         func->srf_bf =
11523                                 kmemdup(nla_data(srf_tb[NL80211_NAN_SRF_BF]),
11524                                         func->srf_bf_len, GFP_KERNEL);
11525                         if (!func->srf_bf) {
11526                                 err = -ENOMEM;
11527                                 goto out;
11528                         }
11529
11530                         func->srf_bf_idx =
11531                                 nla_get_u8(srf_tb[NL80211_NAN_SRF_BF_IDX]);
11532                 } else {
11533                         struct nlattr *attr, *mac_attr =
11534                                 srf_tb[NL80211_NAN_SRF_MAC_ADDRS];
11535                         int n_entries, rem, i = 0;
11536
11537                         if (!mac_attr) {
11538                                 err = -EINVAL;
11539                                 goto out;
11540                         }
11541
11542                         n_entries = validate_acl_mac_addrs(mac_attr);
11543                         if (n_entries <= 0) {
11544                                 err = -EINVAL;
11545                                 goto out;
11546                         }
11547
11548                         func->srf_num_macs = n_entries;
11549                         func->srf_macs =
11550                                 kzalloc(sizeof(*func->srf_macs) * n_entries,
11551                                         GFP_KERNEL);
11552                         if (!func->srf_macs) {
11553                                 err = -ENOMEM;
11554                                 goto out;
11555                         }
11556
11557                         nla_for_each_nested(attr, mac_attr, rem)
11558                                 memcpy(func->srf_macs[i++].addr, nla_data(attr),
11559                                        sizeof(*func->srf_macs));
11560                 }
11561         }
11562
11563         if (tb[NL80211_NAN_FUNC_TX_MATCH_FILTER]) {
11564                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_TX_MATCH_FILTER],
11565                                         func, true);
11566                 if (err)
11567                         goto out;
11568         }
11569
11570         if (tb[NL80211_NAN_FUNC_RX_MATCH_FILTER]) {
11571                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_RX_MATCH_FILTER],
11572                                         func, false);
11573                 if (err)
11574                         goto out;
11575         }
11576
11577         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11578         if (!msg) {
11579                 err = -ENOMEM;
11580                 goto out;
11581         }
11582
11583         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11584                              NL80211_CMD_ADD_NAN_FUNCTION);
11585         /* This can't really happen - we just allocated 4KB */
11586         if (WARN_ON(!hdr)) {
11587                 err = -ENOMEM;
11588                 goto out;
11589         }
11590
11591         err = rdev_add_nan_func(rdev, wdev, func);
11592 out:
11593         if (err < 0) {
11594                 cfg80211_free_nan_func(func);
11595                 nlmsg_free(msg);
11596                 return err;
11597         }
11598
11599         /* propagate the instance id and cookie to userspace  */
11600         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, func->cookie,
11601                               NL80211_ATTR_PAD))
11602                 goto nla_put_failure;
11603
11604         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
11605         if (!func_attr)
11606                 goto nla_put_failure;
11607
11608         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID,
11609                        func->instance_id))
11610                 goto nla_put_failure;
11611
11612         nla_nest_end(msg, func_attr);
11613
11614         genlmsg_end(msg, hdr);
11615         return genlmsg_reply(msg, info);
11616
11617 nla_put_failure:
11618         nlmsg_free(msg);
11619         return -ENOBUFS;
11620 }
11621
11622 static int nl80211_nan_del_func(struct sk_buff *skb,
11623                                struct genl_info *info)
11624 {
11625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11626         struct wireless_dev *wdev = info->user_ptr[1];
11627         u64 cookie;
11628
11629         if (wdev->iftype != NL80211_IFTYPE_NAN)
11630                 return -EOPNOTSUPP;
11631
11632         if (!wdev_running(wdev))
11633                 return -ENOTCONN;
11634
11635         if (!info->attrs[NL80211_ATTR_COOKIE])
11636                 return -EINVAL;
11637
11638         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
11639
11640         rdev_del_nan_func(rdev, wdev, cookie);
11641
11642         return 0;
11643 }
11644
11645 static int nl80211_nan_change_config(struct sk_buff *skb,
11646                                      struct genl_info *info)
11647 {
11648         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11649         struct wireless_dev *wdev = info->user_ptr[1];
11650         struct cfg80211_nan_conf conf = {};
11651         u32 changed = 0;
11652
11653         if (wdev->iftype != NL80211_IFTYPE_NAN)
11654                 return -EOPNOTSUPP;
11655
11656         if (!wdev_running(wdev))
11657                 return -ENOTCONN;
11658
11659         if (info->attrs[NL80211_ATTR_NAN_MASTER_PREF]) {
11660                 conf.master_pref =
11661                         nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
11662                 if (conf.master_pref <= 1 || conf.master_pref == 255)
11663                         return -EINVAL;
11664
11665                 changed |= CFG80211_NAN_CONF_CHANGED_PREF;
11666         }
11667
11668         if (info->attrs[NL80211_ATTR_BANDS]) {
11669                 u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);
11670
11671                 if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
11672                         return -EOPNOTSUPP;
11673
11674                 if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
11675                         return -EINVAL;
11676
11677                 conf.bands = bands;
11678                 changed |= CFG80211_NAN_CONF_CHANGED_BANDS;
11679         }
11680
11681         if (!changed)
11682                 return -EINVAL;
11683
11684         return rdev_nan_change_conf(rdev, wdev, &conf, changed);
11685 }
11686
11687 void cfg80211_nan_match(struct wireless_dev *wdev,
11688                         struct cfg80211_nan_match_params *match, gfp_t gfp)
11689 {
11690         struct wiphy *wiphy = wdev->wiphy;
11691         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11692         struct nlattr *match_attr, *local_func_attr, *peer_func_attr;
11693         struct sk_buff *msg;
11694         void *hdr;
11695
11696         if (WARN_ON(!match->inst_id || !match->peer_inst_id || !match->addr))
11697                 return;
11698
11699         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11700         if (!msg)
11701                 return;
11702
11703         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NAN_MATCH);
11704         if (!hdr) {
11705                 nlmsg_free(msg);
11706                 return;
11707         }
11708
11709         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11710             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11711                                          wdev->netdev->ifindex)) ||
11712             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11713                               NL80211_ATTR_PAD))
11714                 goto nla_put_failure;
11715
11716         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, match->cookie,
11717                               NL80211_ATTR_PAD) ||
11718             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, match->addr))
11719                 goto nla_put_failure;
11720
11721         match_attr = nla_nest_start(msg, NL80211_ATTR_NAN_MATCH);
11722         if (!match_attr)
11723                 goto nla_put_failure;
11724
11725         local_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_LOCAL);
11726         if (!local_func_attr)
11727                 goto nla_put_failure;
11728
11729         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->inst_id))
11730                 goto nla_put_failure;
11731
11732         nla_nest_end(msg, local_func_attr);
11733
11734         peer_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_PEER);
11735         if (!peer_func_attr)
11736                 goto nla_put_failure;
11737
11738         if (nla_put_u8(msg, NL80211_NAN_FUNC_TYPE, match->type) ||
11739             nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->peer_inst_id))
11740                 goto nla_put_failure;
11741
11742         if (match->info && match->info_len &&
11743             nla_put(msg, NL80211_NAN_FUNC_SERVICE_INFO, match->info_len,
11744                     match->info))
11745                 goto nla_put_failure;
11746
11747         nla_nest_end(msg, peer_func_attr);
11748         nla_nest_end(msg, match_attr);
11749         genlmsg_end(msg, hdr);
11750
11751         if (!wdev->owner_nlportid)
11752                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11753                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11754         else
11755                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11756                                 wdev->owner_nlportid);
11757
11758         return;
11759
11760 nla_put_failure:
11761         nlmsg_free(msg);
11762 }
11763 EXPORT_SYMBOL(cfg80211_nan_match);
11764
11765 void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
11766                                   u8 inst_id,
11767                                   enum nl80211_nan_func_term_reason reason,
11768                                   u64 cookie, gfp_t gfp)
11769 {
11770         struct wiphy *wiphy = wdev->wiphy;
11771         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11772         struct sk_buff *msg;
11773         struct nlattr *func_attr;
11774         void *hdr;
11775
11776         if (WARN_ON(!inst_id))
11777                 return;
11778
11779         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11780         if (!msg)
11781                 return;
11782
11783         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_NAN_FUNCTION);
11784         if (!hdr) {
11785                 nlmsg_free(msg);
11786                 return;
11787         }
11788
11789         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11790             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11791                                          wdev->netdev->ifindex)) ||
11792             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11793                               NL80211_ATTR_PAD))
11794                 goto nla_put_failure;
11795
11796         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
11797                               NL80211_ATTR_PAD))
11798                 goto nla_put_failure;
11799
11800         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
11801         if (!func_attr)
11802                 goto nla_put_failure;
11803
11804         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, inst_id) ||
11805             nla_put_u8(msg, NL80211_NAN_FUNC_TERM_REASON, reason))
11806                 goto nla_put_failure;
11807
11808         nla_nest_end(msg, func_attr);
11809         genlmsg_end(msg, hdr);
11810
11811         if (!wdev->owner_nlportid)
11812                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11813                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11814         else
11815                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11816                                 wdev->owner_nlportid);
11817
11818         return;
11819
11820 nla_put_failure:
11821         nlmsg_free(msg);
11822 }
11823 EXPORT_SYMBOL(cfg80211_nan_func_terminated);
11824
11825 static int nl80211_get_protocol_features(struct sk_buff *skb,
11826                                          struct genl_info *info)
11827 {
11828         void *hdr;
11829         struct sk_buff *msg;
11830
11831         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11832         if (!msg)
11833                 return -ENOMEM;
11834
11835         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11836                              NL80211_CMD_GET_PROTOCOL_FEATURES);
11837         if (!hdr)
11838                 goto nla_put_failure;
11839
11840         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
11841                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
11842                 goto nla_put_failure;
11843
11844         genlmsg_end(msg, hdr);
11845         return genlmsg_reply(msg, info);
11846
11847  nla_put_failure:
11848         kfree_skb(msg);
11849         return -ENOBUFS;
11850 }
11851
11852 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
11853 {
11854         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11855         struct cfg80211_update_ft_ies_params ft_params;
11856         struct net_device *dev = info->user_ptr[1];
11857
11858         if (!rdev->ops->update_ft_ies)
11859                 return -EOPNOTSUPP;
11860
11861         if (!info->attrs[NL80211_ATTR_MDID] ||
11862             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
11863                 return -EINVAL;
11864
11865         memset(&ft_params, 0, sizeof(ft_params));
11866         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
11867         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
11868         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
11869
11870         return rdev_update_ft_ies(rdev, dev, &ft_params);
11871 }
11872
11873 static int nl80211_crit_protocol_start(struct sk_buff *skb,
11874                                        struct genl_info *info)
11875 {
11876         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11877         struct wireless_dev *wdev = info->user_ptr[1];
11878         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
11879         u16 duration;
11880         int ret;
11881
11882         if (!rdev->ops->crit_proto_start)
11883                 return -EOPNOTSUPP;
11884
11885         if (WARN_ON(!rdev->ops->crit_proto_stop))
11886                 return -EINVAL;
11887
11888         if (rdev->crit_proto_nlportid)
11889                 return -EBUSY;
11890
11891         /* determine protocol if provided */
11892         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
11893                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
11894
11895         if (proto >= NUM_NL80211_CRIT_PROTO)
11896                 return -EINVAL;
11897
11898         /* timeout must be provided */
11899         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
11900                 return -EINVAL;
11901
11902         duration =
11903                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
11904
11905         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
11906                 return -ERANGE;
11907
11908         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
11909         if (!ret)
11910                 rdev->crit_proto_nlportid = info->snd_portid;
11911
11912         return ret;
11913 }
11914
11915 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
11916                                       struct genl_info *info)
11917 {
11918         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11919         struct wireless_dev *wdev = info->user_ptr[1];
11920
11921         if (!rdev->ops->crit_proto_stop)
11922                 return -EOPNOTSUPP;
11923
11924         if (rdev->crit_proto_nlportid) {
11925                 rdev->crit_proto_nlportid = 0;
11926                 rdev_crit_proto_stop(rdev, wdev);
11927         }
11928         return 0;
11929 }
11930
11931 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
11932 {
11933         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11934         struct wireless_dev *wdev =
11935                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
11936         int i, err;
11937         u32 vid, subcmd;
11938
11939         if (!rdev->wiphy.vendor_commands)
11940                 return -EOPNOTSUPP;
11941
11942         if (IS_ERR(wdev)) {
11943                 err = PTR_ERR(wdev);
11944                 if (err != -EINVAL)
11945                         return err;
11946                 wdev = NULL;
11947         } else if (wdev->wiphy != &rdev->wiphy) {
11948                 return -EINVAL;
11949         }
11950
11951         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
11952             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
11953                 return -EINVAL;
11954
11955         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
11956         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
11957         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
11958                 const struct wiphy_vendor_command *vcmd;
11959                 void *data = NULL;
11960                 int len = 0;
11961
11962                 vcmd = &rdev->wiphy.vendor_commands[i];
11963
11964                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
11965                         continue;
11966
11967                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
11968                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
11969                         if (!wdev)
11970                                 return -EINVAL;
11971                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
11972                             !wdev->netdev)
11973                                 return -EINVAL;
11974
11975                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
11976                                 if (!wdev_running(wdev))
11977                                         return -ENETDOWN;
11978                         }
11979
11980                         if (!vcmd->doit)
11981                                 return -EOPNOTSUPP;
11982                 } else {
11983                         wdev = NULL;
11984                 }
11985
11986                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
11987                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11988                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11989                 }
11990
11991                 rdev->cur_cmd_info = info;
11992                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
11993                                                           data, len);
11994                 rdev->cur_cmd_info = NULL;
11995                 return err;
11996         }
11997
11998         return -EOPNOTSUPP;
11999 }
12000
12001 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
12002                                        struct netlink_callback *cb,
12003                                        struct cfg80211_registered_device **rdev,
12004                                        struct wireless_dev **wdev)
12005 {
12006         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
12007         u32 vid, subcmd;
12008         unsigned int i;
12009         int vcmd_idx = -1;
12010         int err;
12011         void *data = NULL;
12012         unsigned int data_len = 0;
12013
12014         if (cb->args[0]) {
12015                 /* subtract the 1 again here */
12016                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
12017                 struct wireless_dev *tmp;
12018
12019                 if (!wiphy)
12020                         return -ENODEV;
12021                 *rdev = wiphy_to_rdev(wiphy);
12022                 *wdev = NULL;
12023
12024                 if (cb->args[1]) {
12025                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
12026                                 if (tmp->identifier == cb->args[1] - 1) {
12027                                         *wdev = tmp;
12028                                         break;
12029                                 }
12030                         }
12031                 }
12032
12033                 /* keep rtnl locked in successful case */
12034                 return 0;
12035         }
12036
12037         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, attrbuf,
12038                           nl80211_fam.maxattr, nl80211_policy, NULL);
12039         if (err)
12040                 return err;
12041
12042         if (!attrbuf[NL80211_ATTR_VENDOR_ID] ||
12043             !attrbuf[NL80211_ATTR_VENDOR_SUBCMD])
12044                 return -EINVAL;
12045
12046         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk), attrbuf);
12047         if (IS_ERR(*wdev))
12048                 *wdev = NULL;
12049
12050         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
12051         if (IS_ERR(*rdev))
12052                 return PTR_ERR(*rdev);
12053
12054         vid = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_ID]);
12055         subcmd = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
12056
12057         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
12058                 const struct wiphy_vendor_command *vcmd;
12059
12060                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
12061
12062                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
12063                         continue;
12064
12065                 if (!vcmd->dumpit)
12066                         return -EOPNOTSUPP;
12067
12068                 vcmd_idx = i;
12069                 break;
12070         }
12071
12072         if (vcmd_idx < 0)
12073                 return -EOPNOTSUPP;
12074
12075         if (attrbuf[NL80211_ATTR_VENDOR_DATA]) {
12076                 data = nla_data(attrbuf[NL80211_ATTR_VENDOR_DATA]);
12077                 data_len = nla_len(attrbuf[NL80211_ATTR_VENDOR_DATA]);
12078         }
12079
12080         /* 0 is the first index - add 1 to parse only once */
12081         cb->args[0] = (*rdev)->wiphy_idx + 1;
12082         /* add 1 to know if it was NULL */
12083         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
12084         cb->args[2] = vcmd_idx;
12085         cb->args[3] = (unsigned long)data;
12086         cb->args[4] = data_len;
12087
12088         /* keep rtnl locked in successful case */
12089         return 0;
12090 }
12091
12092 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
12093                                    struct netlink_callback *cb)
12094 {
12095         struct cfg80211_registered_device *rdev;
12096         struct wireless_dev *wdev;
12097         unsigned int vcmd_idx;
12098         const struct wiphy_vendor_command *vcmd;
12099         void *data;
12100         int data_len;
12101         int err;
12102         struct nlattr *vendor_data;
12103
12104         rtnl_lock();
12105         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
12106         if (err)
12107                 goto out;
12108
12109         vcmd_idx = cb->args[2];
12110         data = (void *)cb->args[3];
12111         data_len = cb->args[4];
12112         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
12113
12114         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
12115                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
12116                 if (!wdev) {
12117                         err = -EINVAL;
12118                         goto out;
12119                 }
12120                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
12121                     !wdev->netdev) {
12122                         err = -EINVAL;
12123                         goto out;
12124                 }
12125
12126                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
12127                         if (!wdev_running(wdev)) {
12128                                 err = -ENETDOWN;
12129                                 goto out;
12130                         }
12131                 }
12132         }
12133
12134         while (1) {
12135                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
12136                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
12137                                            NL80211_CMD_VENDOR);
12138                 if (!hdr)
12139                         break;
12140
12141                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12142                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
12143                                                wdev_id(wdev),
12144                                                NL80211_ATTR_PAD))) {
12145                         genlmsg_cancel(skb, hdr);
12146                         break;
12147                 }
12148
12149                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
12150                 if (!vendor_data) {
12151                         genlmsg_cancel(skb, hdr);
12152                         break;
12153                 }
12154
12155                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
12156                                    (unsigned long *)&cb->args[5]);
12157                 nla_nest_end(skb, vendor_data);
12158
12159                 if (err == -ENOBUFS || err == -ENOENT) {
12160                         genlmsg_cancel(skb, hdr);
12161                         break;
12162                 } else if (err) {
12163                         genlmsg_cancel(skb, hdr);
12164                         goto out;
12165                 }
12166
12167                 genlmsg_end(skb, hdr);
12168         }
12169
12170         err = skb->len;
12171  out:
12172         rtnl_unlock();
12173         return err;
12174 }
12175
12176 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
12177                                            enum nl80211_commands cmd,
12178                                            enum nl80211_attrs attr,
12179                                            int approxlen)
12180 {
12181         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12182
12183         if (WARN_ON(!rdev->cur_cmd_info))
12184                 return NULL;
12185
12186         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
12187                                            rdev->cur_cmd_info->snd_portid,
12188                                            rdev->cur_cmd_info->snd_seq,
12189                                            cmd, attr, NULL, GFP_KERNEL);
12190 }
12191 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
12192
12193 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
12194 {
12195         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
12196         void *hdr = ((void **)skb->cb)[1];
12197         struct nlattr *data = ((void **)skb->cb)[2];
12198
12199         /* clear CB data for netlink core to own from now on */
12200         memset(skb->cb, 0, sizeof(skb->cb));
12201
12202         if (WARN_ON(!rdev->cur_cmd_info)) {
12203                 kfree_skb(skb);
12204                 return -EINVAL;
12205         }
12206
12207         nla_nest_end(skb, data);
12208         genlmsg_end(skb, hdr);
12209         return genlmsg_reply(skb, rdev->cur_cmd_info);
12210 }
12211 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
12212
12213 static int nl80211_set_qos_map(struct sk_buff *skb,
12214                                struct genl_info *info)
12215 {
12216         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12217         struct cfg80211_qos_map *qos_map = NULL;
12218         struct net_device *dev = info->user_ptr[1];
12219         u8 *pos, len, num_des, des_len, des;
12220         int ret;
12221
12222         if (!rdev->ops->set_qos_map)
12223                 return -EOPNOTSUPP;
12224
12225         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
12226                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
12227                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
12228
12229                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
12230                     len > IEEE80211_QOS_MAP_LEN_MAX)
12231                         return -EINVAL;
12232
12233                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
12234                 if (!qos_map)
12235                         return -ENOMEM;
12236
12237                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
12238                 if (num_des) {
12239                         des_len = num_des *
12240                                 sizeof(struct cfg80211_dscp_exception);
12241                         memcpy(qos_map->dscp_exception, pos, des_len);
12242                         qos_map->num_des = num_des;
12243                         for (des = 0; des < num_des; des++) {
12244                                 if (qos_map->dscp_exception[des].up > 7) {
12245                                         kfree(qos_map);
12246                                         return -EINVAL;
12247                                 }
12248                         }
12249                         pos += des_len;
12250                 }
12251                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
12252         }
12253
12254         wdev_lock(dev->ieee80211_ptr);
12255         ret = nl80211_key_allowed(dev->ieee80211_ptr);
12256         if (!ret)
12257                 ret = rdev_set_qos_map(rdev, dev, qos_map);
12258         wdev_unlock(dev->ieee80211_ptr);
12259
12260         kfree(qos_map);
12261         return ret;
12262 }
12263
12264 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
12265 {
12266         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12267         struct net_device *dev = info->user_ptr[1];
12268         struct wireless_dev *wdev = dev->ieee80211_ptr;
12269         const u8 *peer;
12270         u8 tsid, up;
12271         u16 admitted_time = 0;
12272         int err;
12273
12274         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
12275                 return -EOPNOTSUPP;
12276
12277         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
12278             !info->attrs[NL80211_ATTR_USER_PRIO])
12279                 return -EINVAL;
12280
12281         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
12282         if (tsid >= IEEE80211_NUM_TIDS)
12283                 return -EINVAL;
12284
12285         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
12286         if (up >= IEEE80211_NUM_UPS)
12287                 return -EINVAL;
12288
12289         /* WMM uses TIDs 0-7 even for TSPEC */
12290         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
12291                 /* TODO: handle 802.11 TSPEC/admission control
12292                  * need more attributes for that (e.g. BA session requirement);
12293                  * change the WMM adminssion test above to allow both then
12294                  */
12295                 return -EINVAL;
12296         }
12297
12298         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
12299
12300         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
12301                 admitted_time =
12302                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
12303                 if (!admitted_time)
12304                         return -EINVAL;
12305         }
12306
12307         wdev_lock(wdev);
12308         switch (wdev->iftype) {
12309         case NL80211_IFTYPE_STATION:
12310         case NL80211_IFTYPE_P2P_CLIENT:
12311                 if (wdev->current_bss)
12312                         break;
12313                 err = -ENOTCONN;
12314                 goto out;
12315         default:
12316                 err = -EOPNOTSUPP;
12317                 goto out;
12318         }
12319
12320         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
12321
12322  out:
12323         wdev_unlock(wdev);
12324         return err;
12325 }
12326
12327 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
12328 {
12329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12330         struct net_device *dev = info->user_ptr[1];
12331         struct wireless_dev *wdev = dev->ieee80211_ptr;
12332         const u8 *peer;
12333         u8 tsid;
12334         int err;
12335
12336         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
12337                 return -EINVAL;
12338
12339         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
12340         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
12341
12342         wdev_lock(wdev);
12343         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
12344         wdev_unlock(wdev);
12345
12346         return err;
12347 }
12348
12349 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
12350                                        struct genl_info *info)
12351 {
12352         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12353         struct net_device *dev = info->user_ptr[1];
12354         struct wireless_dev *wdev = dev->ieee80211_ptr;
12355         struct cfg80211_chan_def chandef = {};
12356         const u8 *addr;
12357         u8 oper_class;
12358         int err;
12359
12360         if (!rdev->ops->tdls_channel_switch ||
12361             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
12362                 return -EOPNOTSUPP;
12363
12364         switch (dev->ieee80211_ptr->iftype) {
12365         case NL80211_IFTYPE_STATION:
12366         case NL80211_IFTYPE_P2P_CLIENT:
12367                 break;
12368         default:
12369                 return -EOPNOTSUPP;
12370         }
12371
12372         if (!info->attrs[NL80211_ATTR_MAC] ||
12373             !info->attrs[NL80211_ATTR_OPER_CLASS])
12374                 return -EINVAL;
12375
12376         err = nl80211_parse_chandef(rdev, info, &chandef);
12377         if (err)
12378                 return err;
12379
12380         /*
12381          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
12382          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
12383          * specification is not defined for them.
12384          */
12385         if (chandef.chan->band == NL80211_BAND_2GHZ &&
12386             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
12387             chandef.width != NL80211_CHAN_WIDTH_20)
12388                 return -EINVAL;
12389
12390         /* we will be active on the TDLS link */
12391         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
12392                                            wdev->iftype))
12393                 return -EINVAL;
12394
12395         /* don't allow switching to DFS channels */
12396         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
12397                 return -EINVAL;
12398
12399         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
12400         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
12401
12402         wdev_lock(wdev);
12403         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
12404         wdev_unlock(wdev);
12405
12406         return err;
12407 }
12408
12409 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
12410                                               struct genl_info *info)
12411 {
12412         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12413         struct net_device *dev = info->user_ptr[1];
12414         struct wireless_dev *wdev = dev->ieee80211_ptr;
12415         const u8 *addr;
12416
12417         if (!rdev->ops->tdls_channel_switch ||
12418             !rdev->ops->tdls_cancel_channel_switch ||
12419             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
12420                 return -EOPNOTSUPP;
12421
12422         switch (dev->ieee80211_ptr->iftype) {
12423         case NL80211_IFTYPE_STATION:
12424         case NL80211_IFTYPE_P2P_CLIENT:
12425                 break;
12426         default:
12427                 return -EOPNOTSUPP;
12428         }
12429
12430         if (!info->attrs[NL80211_ATTR_MAC])
12431                 return -EINVAL;
12432
12433         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
12434
12435         wdev_lock(wdev);
12436         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
12437         wdev_unlock(wdev);
12438
12439         return 0;
12440 }
12441
12442 static int nl80211_set_multicast_to_unicast(struct sk_buff *skb,
12443                                             struct genl_info *info)
12444 {
12445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12446         struct net_device *dev = info->user_ptr[1];
12447         struct wireless_dev *wdev = dev->ieee80211_ptr;
12448         const struct nlattr *nla;
12449         bool enabled;
12450
12451         if (!rdev->ops->set_multicast_to_unicast)
12452                 return -EOPNOTSUPP;
12453
12454         if (wdev->iftype != NL80211_IFTYPE_AP &&
12455             wdev->iftype != NL80211_IFTYPE_P2P_GO)
12456                 return -EOPNOTSUPP;
12457
12458         nla = info->attrs[NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED];
12459         enabled = nla_get_flag(nla);
12460
12461         return rdev_set_multicast_to_unicast(rdev, dev, enabled);
12462 }
12463
12464 static int nl80211_set_pmk(struct sk_buff *skb, struct genl_info *info)
12465 {
12466         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12467         struct net_device *dev = info->user_ptr[1];
12468         struct wireless_dev *wdev = dev->ieee80211_ptr;
12469         struct cfg80211_pmk_conf pmk_conf = {};
12470         int ret;
12471
12472         if (wdev->iftype != NL80211_IFTYPE_STATION &&
12473             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
12474                 return -EOPNOTSUPP;
12475
12476         if (!wiphy_ext_feature_isset(&rdev->wiphy,
12477                                      NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
12478                 return -EOPNOTSUPP;
12479
12480         if (!info->attrs[NL80211_ATTR_MAC] || !info->attrs[NL80211_ATTR_PMK])
12481                 return -EINVAL;
12482
12483         wdev_lock(wdev);
12484         if (!wdev->current_bss) {
12485                 ret = -ENOTCONN;
12486                 goto out;
12487         }
12488
12489         pmk_conf.aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
12490         if (memcmp(pmk_conf.aa, wdev->current_bss->pub.bssid, ETH_ALEN)) {
12491                 ret = -EINVAL;
12492                 goto out;
12493         }
12494
12495         pmk_conf.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
12496         pmk_conf.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
12497         if (pmk_conf.pmk_len != WLAN_PMK_LEN &&
12498             pmk_conf.pmk_len != WLAN_PMK_LEN_SUITE_B_192) {
12499                 ret = -EINVAL;
12500                 goto out;
12501         }
12502
12503         if (info->attrs[NL80211_ATTR_PMKR0_NAME]) {
12504                 int r0_name_len = nla_len(info->attrs[NL80211_ATTR_PMKR0_NAME]);
12505
12506                 if (r0_name_len != WLAN_PMK_NAME_LEN) {
12507                         ret = -EINVAL;
12508                         goto out;
12509                 }
12510
12511                 pmk_conf.pmk_r0_name =
12512                         nla_data(info->attrs[NL80211_ATTR_PMKR0_NAME]);
12513         }
12514
12515         ret = rdev_set_pmk(rdev, dev, &pmk_conf);
12516 out:
12517         wdev_unlock(wdev);
12518         return ret;
12519 }
12520
12521 static int nl80211_del_pmk(struct sk_buff *skb, struct genl_info *info)
12522 {
12523         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12524         struct net_device *dev = info->user_ptr[1];
12525         struct wireless_dev *wdev = dev->ieee80211_ptr;
12526         const u8 *aa;
12527         int ret;
12528
12529         if (wdev->iftype != NL80211_IFTYPE_STATION &&
12530             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
12531                 return -EOPNOTSUPP;
12532
12533         if (!wiphy_ext_feature_isset(&rdev->wiphy,
12534                                      NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
12535                 return -EOPNOTSUPP;
12536
12537         if (!info->attrs[NL80211_ATTR_MAC])
12538                 return -EINVAL;
12539
12540         wdev_lock(wdev);
12541         aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
12542         ret = rdev_del_pmk(rdev, dev, aa);
12543         wdev_unlock(wdev);
12544
12545         return ret;
12546 }
12547
12548 static int nl80211_external_auth(struct sk_buff *skb, struct genl_info *info)
12549 {
12550         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12551         struct net_device *dev = info->user_ptr[1];
12552         struct cfg80211_external_auth_params params;
12553
12554         if (!rdev->ops->external_auth)
12555                 return -EOPNOTSUPP;
12556
12557         if (!info->attrs[NL80211_ATTR_SSID])
12558                 return -EINVAL;
12559
12560         if (!info->attrs[NL80211_ATTR_BSSID])
12561                 return -EINVAL;
12562
12563         if (!info->attrs[NL80211_ATTR_STATUS_CODE])
12564                 return -EINVAL;
12565
12566         memset(&params, 0, sizeof(params));
12567
12568         params.ssid.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
12569         if (params.ssid.ssid_len == 0 ||
12570             params.ssid.ssid_len > IEEE80211_MAX_SSID_LEN)
12571                 return -EINVAL;
12572         memcpy(params.ssid.ssid, nla_data(info->attrs[NL80211_ATTR_SSID]),
12573                params.ssid.ssid_len);
12574
12575         memcpy(params.bssid, nla_data(info->attrs[NL80211_ATTR_BSSID]),
12576                ETH_ALEN);
12577
12578         params.status = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
12579
12580         return rdev_external_auth(rdev, dev, &params);
12581 }
12582
12583 static int nl80211_tx_control_port(struct sk_buff *skb, struct genl_info *info)
12584 {
12585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12586         struct net_device *dev = info->user_ptr[1];
12587         struct wireless_dev *wdev = dev->ieee80211_ptr;
12588         const u8 *buf;
12589         size_t len;
12590         u8 *dest;
12591         u16 proto;
12592         bool noencrypt;
12593         int err;
12594
12595         if (!wiphy_ext_feature_isset(&rdev->wiphy,
12596                                      NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211))
12597                 return -EOPNOTSUPP;
12598
12599         if (!rdev->ops->tx_control_port)
12600                 return -EOPNOTSUPP;
12601
12602         if (!info->attrs[NL80211_ATTR_FRAME] ||
12603             !info->attrs[NL80211_ATTR_MAC] ||
12604             !info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
12605                 GENL_SET_ERR_MSG(info, "Frame, MAC or ethertype missing");
12606                 return -EINVAL;
12607         }
12608
12609         wdev_lock(wdev);
12610
12611         switch (wdev->iftype) {
12612         case NL80211_IFTYPE_AP:
12613         case NL80211_IFTYPE_P2P_GO:
12614         case NL80211_IFTYPE_MESH_POINT:
12615                 break;
12616         case NL80211_IFTYPE_ADHOC:
12617         case NL80211_IFTYPE_STATION:
12618         case NL80211_IFTYPE_P2P_CLIENT:
12619                 if (wdev->current_bss)
12620                         break;
12621                 err = -ENOTCONN;
12622                 goto out;
12623         default:
12624                 err = -EOPNOTSUPP;
12625                 goto out;
12626         }
12627
12628         wdev_unlock(wdev);
12629
12630         buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
12631         len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
12632         dest = nla_data(info->attrs[NL80211_ATTR_MAC]);
12633         proto = nla_get_u16(info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
12634         noencrypt =
12635                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT]);
12636
12637         return rdev_tx_control_port(rdev, dev, buf, len,
12638                                     dest, cpu_to_be16(proto), noencrypt);
12639
12640  out:
12641         wdev_unlock(wdev);
12642         return err;
12643 }
12644
12645 #define NL80211_FLAG_NEED_WIPHY         0x01
12646 #define NL80211_FLAG_NEED_NETDEV        0x02
12647 #define NL80211_FLAG_NEED_RTNL          0x04
12648 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
12649 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
12650                                          NL80211_FLAG_CHECK_NETDEV_UP)
12651 #define NL80211_FLAG_NEED_WDEV          0x10
12652 /* If a netdev is associated, it must be UP, P2P must be started */
12653 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
12654                                          NL80211_FLAG_CHECK_NETDEV_UP)
12655 #define NL80211_FLAG_CLEAR_SKB          0x20
12656
12657 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
12658                             struct genl_info *info)
12659 {
12660         struct cfg80211_registered_device *rdev;
12661         struct wireless_dev *wdev;
12662         struct net_device *dev;
12663         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
12664
12665         if (rtnl)
12666                 rtnl_lock();
12667
12668         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
12669                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
12670                 if (IS_ERR(rdev)) {
12671                         if (rtnl)
12672                                 rtnl_unlock();
12673                         return PTR_ERR(rdev);
12674                 }
12675                 info->user_ptr[0] = rdev;
12676         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
12677                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
12678                 ASSERT_RTNL();
12679
12680                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
12681                                                   info->attrs);
12682                 if (IS_ERR(wdev)) {
12683                         if (rtnl)
12684                                 rtnl_unlock();
12685                         return PTR_ERR(wdev);
12686                 }
12687
12688                 dev = wdev->netdev;
12689                 rdev = wiphy_to_rdev(wdev->wiphy);
12690
12691                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
12692                         if (!dev) {
12693                                 if (rtnl)
12694                                         rtnl_unlock();
12695                                 return -EINVAL;
12696                         }
12697
12698                         info->user_ptr[1] = dev;
12699                 } else {
12700                         info->user_ptr[1] = wdev;
12701                 }
12702
12703                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
12704                     !wdev_running(wdev)) {
12705                         if (rtnl)
12706                                 rtnl_unlock();
12707                         return -ENETDOWN;
12708                 }
12709
12710                 if (dev)
12711                         dev_hold(dev);
12712
12713                 info->user_ptr[0] = rdev;
12714         }
12715
12716         return 0;
12717 }
12718
12719 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
12720                               struct genl_info *info)
12721 {
12722         if (info->user_ptr[1]) {
12723                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
12724                         struct wireless_dev *wdev = info->user_ptr[1];
12725
12726                         if (wdev->netdev)
12727                                 dev_put(wdev->netdev);
12728                 } else {
12729                         dev_put(info->user_ptr[1]);
12730                 }
12731         }
12732
12733         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
12734                 rtnl_unlock();
12735
12736         /* If needed, clear the netlink message payload from the SKB
12737          * as it might contain key data that shouldn't stick around on
12738          * the heap after the SKB is freed. The netlink message header
12739          * is still needed for further processing, so leave it intact.
12740          */
12741         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
12742                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
12743
12744                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
12745         }
12746 }
12747
12748 static const struct genl_ops nl80211_ops[] = {
12749         {
12750                 .cmd = NL80211_CMD_GET_WIPHY,
12751                 .doit = nl80211_get_wiphy,
12752                 .dumpit = nl80211_dump_wiphy,
12753                 .done = nl80211_dump_wiphy_done,
12754                 .policy = nl80211_policy,
12755                 /* can be retrieved by unprivileged users */
12756                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12757                                   NL80211_FLAG_NEED_RTNL,
12758         },
12759         {
12760                 .cmd = NL80211_CMD_SET_WIPHY,
12761                 .doit = nl80211_set_wiphy,
12762                 .policy = nl80211_policy,
12763                 .flags = GENL_UNS_ADMIN_PERM,
12764                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12765         },
12766         {
12767                 .cmd = NL80211_CMD_GET_INTERFACE,
12768                 .doit = nl80211_get_interface,
12769                 .dumpit = nl80211_dump_interface,
12770                 .policy = nl80211_policy,
12771                 /* can be retrieved by unprivileged users */
12772                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12773                                   NL80211_FLAG_NEED_RTNL,
12774         },
12775         {
12776                 .cmd = NL80211_CMD_SET_INTERFACE,
12777                 .doit = nl80211_set_interface,
12778                 .policy = nl80211_policy,
12779                 .flags = GENL_UNS_ADMIN_PERM,
12780                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12781                                   NL80211_FLAG_NEED_RTNL,
12782         },
12783         {
12784                 .cmd = NL80211_CMD_NEW_INTERFACE,
12785                 .doit = nl80211_new_interface,
12786                 .policy = nl80211_policy,
12787                 .flags = GENL_UNS_ADMIN_PERM,
12788                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12789                                   NL80211_FLAG_NEED_RTNL,
12790         },
12791         {
12792                 .cmd = NL80211_CMD_DEL_INTERFACE,
12793                 .doit = nl80211_del_interface,
12794                 .policy = nl80211_policy,
12795                 .flags = GENL_UNS_ADMIN_PERM,
12796                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12797                                   NL80211_FLAG_NEED_RTNL,
12798         },
12799         {
12800                 .cmd = NL80211_CMD_GET_KEY,
12801                 .doit = nl80211_get_key,
12802                 .policy = nl80211_policy,
12803                 .flags = GENL_UNS_ADMIN_PERM,
12804                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12805                                   NL80211_FLAG_NEED_RTNL,
12806         },
12807         {
12808                 .cmd = NL80211_CMD_SET_KEY,
12809                 .doit = nl80211_set_key,
12810                 .policy = nl80211_policy,
12811                 .flags = GENL_UNS_ADMIN_PERM,
12812                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12813                                   NL80211_FLAG_NEED_RTNL |
12814                                   NL80211_FLAG_CLEAR_SKB,
12815         },
12816         {
12817                 .cmd = NL80211_CMD_NEW_KEY,
12818                 .doit = nl80211_new_key,
12819                 .policy = nl80211_policy,
12820                 .flags = GENL_UNS_ADMIN_PERM,
12821                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12822                                   NL80211_FLAG_NEED_RTNL |
12823                                   NL80211_FLAG_CLEAR_SKB,
12824         },
12825         {
12826                 .cmd = NL80211_CMD_DEL_KEY,
12827                 .doit = nl80211_del_key,
12828                 .policy = nl80211_policy,
12829                 .flags = GENL_UNS_ADMIN_PERM,
12830                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12831                                   NL80211_FLAG_NEED_RTNL,
12832         },
12833         {
12834                 .cmd = NL80211_CMD_SET_BEACON,
12835                 .policy = nl80211_policy,
12836                 .flags = GENL_UNS_ADMIN_PERM,
12837                 .doit = nl80211_set_beacon,
12838                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12839                                   NL80211_FLAG_NEED_RTNL,
12840         },
12841         {
12842                 .cmd = NL80211_CMD_START_AP,
12843                 .policy = nl80211_policy,
12844                 .flags = GENL_UNS_ADMIN_PERM,
12845                 .doit = nl80211_start_ap,
12846                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12847                                   NL80211_FLAG_NEED_RTNL,
12848         },
12849         {
12850                 .cmd = NL80211_CMD_STOP_AP,
12851                 .policy = nl80211_policy,
12852                 .flags = GENL_UNS_ADMIN_PERM,
12853                 .doit = nl80211_stop_ap,
12854                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12855                                   NL80211_FLAG_NEED_RTNL,
12856         },
12857         {
12858                 .cmd = NL80211_CMD_GET_STATION,
12859                 .doit = nl80211_get_station,
12860                 .dumpit = nl80211_dump_station,
12861                 .policy = nl80211_policy,
12862                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12863                                   NL80211_FLAG_NEED_RTNL,
12864         },
12865         {
12866                 .cmd = NL80211_CMD_SET_STATION,
12867                 .doit = nl80211_set_station,
12868                 .policy = nl80211_policy,
12869                 .flags = GENL_UNS_ADMIN_PERM,
12870                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12871                                   NL80211_FLAG_NEED_RTNL,
12872         },
12873         {
12874                 .cmd = NL80211_CMD_NEW_STATION,
12875                 .doit = nl80211_new_station,
12876                 .policy = nl80211_policy,
12877                 .flags = GENL_UNS_ADMIN_PERM,
12878                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12879                                   NL80211_FLAG_NEED_RTNL,
12880         },
12881         {
12882                 .cmd = NL80211_CMD_DEL_STATION,
12883                 .doit = nl80211_del_station,
12884                 .policy = nl80211_policy,
12885                 .flags = GENL_UNS_ADMIN_PERM,
12886                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12887                                   NL80211_FLAG_NEED_RTNL,
12888         },
12889         {
12890                 .cmd = NL80211_CMD_GET_MPATH,
12891                 .doit = nl80211_get_mpath,
12892                 .dumpit = nl80211_dump_mpath,
12893                 .policy = nl80211_policy,
12894                 .flags = GENL_UNS_ADMIN_PERM,
12895                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12896                                   NL80211_FLAG_NEED_RTNL,
12897         },
12898         {
12899                 .cmd = NL80211_CMD_GET_MPP,
12900                 .doit = nl80211_get_mpp,
12901                 .dumpit = nl80211_dump_mpp,
12902                 .policy = nl80211_policy,
12903                 .flags = GENL_UNS_ADMIN_PERM,
12904                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12905                                   NL80211_FLAG_NEED_RTNL,
12906         },
12907         {
12908                 .cmd = NL80211_CMD_SET_MPATH,
12909                 .doit = nl80211_set_mpath,
12910                 .policy = nl80211_policy,
12911                 .flags = GENL_UNS_ADMIN_PERM,
12912                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12913                                   NL80211_FLAG_NEED_RTNL,
12914         },
12915         {
12916                 .cmd = NL80211_CMD_NEW_MPATH,
12917                 .doit = nl80211_new_mpath,
12918                 .policy = nl80211_policy,
12919                 .flags = GENL_UNS_ADMIN_PERM,
12920                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12921                                   NL80211_FLAG_NEED_RTNL,
12922         },
12923         {
12924                 .cmd = NL80211_CMD_DEL_MPATH,
12925                 .doit = nl80211_del_mpath,
12926                 .policy = nl80211_policy,
12927                 .flags = GENL_UNS_ADMIN_PERM,
12928                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12929                                   NL80211_FLAG_NEED_RTNL,
12930         },
12931         {
12932                 .cmd = NL80211_CMD_SET_BSS,
12933                 .doit = nl80211_set_bss,
12934                 .policy = nl80211_policy,
12935                 .flags = GENL_UNS_ADMIN_PERM,
12936                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12937                                   NL80211_FLAG_NEED_RTNL,
12938         },
12939         {
12940                 .cmd = NL80211_CMD_GET_REG,
12941                 .doit = nl80211_get_reg_do,
12942                 .dumpit = nl80211_get_reg_dump,
12943                 .policy = nl80211_policy,
12944                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12945                 /* can be retrieved by unprivileged users */
12946         },
12947 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
12948         {
12949                 .cmd = NL80211_CMD_SET_REG,
12950                 .doit = nl80211_set_reg,
12951                 .policy = nl80211_policy,
12952                 .flags = GENL_ADMIN_PERM,
12953                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12954         },
12955 #endif
12956         {
12957                 .cmd = NL80211_CMD_REQ_SET_REG,
12958                 .doit = nl80211_req_set_reg,
12959                 .policy = nl80211_policy,
12960                 .flags = GENL_ADMIN_PERM,
12961         },
12962         {
12963                 .cmd = NL80211_CMD_RELOAD_REGDB,
12964                 .doit = nl80211_reload_regdb,
12965                 .policy = nl80211_policy,
12966                 .flags = GENL_ADMIN_PERM,
12967         },
12968         {
12969                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
12970                 .doit = nl80211_get_mesh_config,
12971                 .policy = nl80211_policy,
12972                 /* can be retrieved by unprivileged users */
12973                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12974                                   NL80211_FLAG_NEED_RTNL,
12975         },
12976         {
12977                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
12978                 .doit = nl80211_update_mesh_config,
12979                 .policy = nl80211_policy,
12980                 .flags = GENL_UNS_ADMIN_PERM,
12981                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12982                                   NL80211_FLAG_NEED_RTNL,
12983         },
12984         {
12985                 .cmd = NL80211_CMD_TRIGGER_SCAN,
12986                 .doit = nl80211_trigger_scan,
12987                 .policy = nl80211_policy,
12988                 .flags = GENL_UNS_ADMIN_PERM,
12989                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12990                                   NL80211_FLAG_NEED_RTNL,
12991         },
12992         {
12993                 .cmd = NL80211_CMD_ABORT_SCAN,
12994                 .doit = nl80211_abort_scan,
12995                 .policy = nl80211_policy,
12996                 .flags = GENL_UNS_ADMIN_PERM,
12997                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12998                                   NL80211_FLAG_NEED_RTNL,
12999         },
13000         {
13001                 .cmd = NL80211_CMD_GET_SCAN,
13002                 .policy = nl80211_policy,
13003                 .dumpit = nl80211_dump_scan,
13004         },
13005         {
13006                 .cmd = NL80211_CMD_START_SCHED_SCAN,
13007                 .doit = nl80211_start_sched_scan,
13008                 .policy = nl80211_policy,
13009                 .flags = GENL_UNS_ADMIN_PERM,
13010                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13011                                   NL80211_FLAG_NEED_RTNL,
13012         },
13013         {
13014                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
13015                 .doit = nl80211_stop_sched_scan,
13016                 .policy = nl80211_policy,
13017                 .flags = GENL_UNS_ADMIN_PERM,
13018                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13019                                   NL80211_FLAG_NEED_RTNL,
13020         },
13021         {
13022                 .cmd = NL80211_CMD_AUTHENTICATE,
13023                 .doit = nl80211_authenticate,
13024                 .policy = nl80211_policy,
13025                 .flags = GENL_UNS_ADMIN_PERM,
13026                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13027                                   NL80211_FLAG_NEED_RTNL |
13028                                   NL80211_FLAG_CLEAR_SKB,
13029         },
13030         {
13031                 .cmd = NL80211_CMD_ASSOCIATE,
13032                 .doit = nl80211_associate,
13033                 .policy = nl80211_policy,
13034                 .flags = GENL_UNS_ADMIN_PERM,
13035                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13036                                   NL80211_FLAG_NEED_RTNL,
13037         },
13038         {
13039                 .cmd = NL80211_CMD_DEAUTHENTICATE,
13040                 .doit = nl80211_deauthenticate,
13041                 .policy = nl80211_policy,
13042                 .flags = GENL_UNS_ADMIN_PERM,
13043                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13044                                   NL80211_FLAG_NEED_RTNL,
13045         },
13046         {
13047                 .cmd = NL80211_CMD_DISASSOCIATE,
13048                 .doit = nl80211_disassociate,
13049                 .policy = nl80211_policy,
13050                 .flags = GENL_UNS_ADMIN_PERM,
13051                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13052                                   NL80211_FLAG_NEED_RTNL,
13053         },
13054         {
13055                 .cmd = NL80211_CMD_JOIN_IBSS,
13056                 .doit = nl80211_join_ibss,
13057                 .policy = nl80211_policy,
13058                 .flags = GENL_UNS_ADMIN_PERM,
13059                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13060                                   NL80211_FLAG_NEED_RTNL,
13061         },
13062         {
13063                 .cmd = NL80211_CMD_LEAVE_IBSS,
13064                 .doit = nl80211_leave_ibss,
13065                 .policy = nl80211_policy,
13066                 .flags = GENL_UNS_ADMIN_PERM,
13067                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13068                                   NL80211_FLAG_NEED_RTNL,
13069         },
13070 #ifdef CONFIG_NL80211_TESTMODE
13071         {
13072                 .cmd = NL80211_CMD_TESTMODE,
13073                 .doit = nl80211_testmode_do,
13074                 .dumpit = nl80211_testmode_dump,
13075                 .policy = nl80211_policy,
13076                 .flags = GENL_UNS_ADMIN_PERM,
13077                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13078                                   NL80211_FLAG_NEED_RTNL,
13079         },
13080 #endif
13081         {
13082                 .cmd = NL80211_CMD_CONNECT,
13083                 .doit = nl80211_connect,
13084                 .policy = nl80211_policy,
13085                 .flags = GENL_UNS_ADMIN_PERM,
13086                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13087                                   NL80211_FLAG_NEED_RTNL,
13088         },
13089         {
13090                 .cmd = NL80211_CMD_UPDATE_CONNECT_PARAMS,
13091                 .doit = nl80211_update_connect_params,
13092                 .policy = nl80211_policy,
13093                 .flags = GENL_ADMIN_PERM,
13094                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13095                                   NL80211_FLAG_NEED_RTNL,
13096         },
13097         {
13098                 .cmd = NL80211_CMD_DISCONNECT,
13099                 .doit = nl80211_disconnect,
13100                 .policy = nl80211_policy,
13101                 .flags = GENL_UNS_ADMIN_PERM,
13102                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13103                                   NL80211_FLAG_NEED_RTNL,
13104         },
13105         {
13106                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
13107                 .doit = nl80211_wiphy_netns,
13108                 .policy = nl80211_policy,
13109                 .flags = GENL_UNS_ADMIN_PERM,
13110                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13111                                   NL80211_FLAG_NEED_RTNL,
13112         },
13113         {
13114                 .cmd = NL80211_CMD_GET_SURVEY,
13115                 .policy = nl80211_policy,
13116                 .dumpit = nl80211_dump_survey,
13117         },
13118         {
13119                 .cmd = NL80211_CMD_SET_PMKSA,
13120                 .doit = nl80211_setdel_pmksa,
13121                 .policy = nl80211_policy,
13122                 .flags = GENL_UNS_ADMIN_PERM,
13123                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13124                                   NL80211_FLAG_NEED_RTNL,
13125         },
13126         {
13127                 .cmd = NL80211_CMD_DEL_PMKSA,
13128                 .doit = nl80211_setdel_pmksa,
13129                 .policy = nl80211_policy,
13130                 .flags = GENL_UNS_ADMIN_PERM,
13131                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13132                                   NL80211_FLAG_NEED_RTNL,
13133         },
13134         {
13135                 .cmd = NL80211_CMD_FLUSH_PMKSA,
13136                 .doit = nl80211_flush_pmksa,
13137                 .policy = nl80211_policy,
13138                 .flags = GENL_UNS_ADMIN_PERM,
13139                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13140                                   NL80211_FLAG_NEED_RTNL,
13141         },
13142         {
13143                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
13144                 .doit = nl80211_remain_on_channel,
13145                 .policy = nl80211_policy,
13146                 .flags = GENL_UNS_ADMIN_PERM,
13147                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13148                                   NL80211_FLAG_NEED_RTNL,
13149         },
13150         {
13151                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
13152                 .doit = nl80211_cancel_remain_on_channel,
13153                 .policy = nl80211_policy,
13154                 .flags = GENL_UNS_ADMIN_PERM,
13155                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13156                                   NL80211_FLAG_NEED_RTNL,
13157         },
13158         {
13159                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
13160                 .doit = nl80211_set_tx_bitrate_mask,
13161                 .policy = nl80211_policy,
13162                 .flags = GENL_UNS_ADMIN_PERM,
13163                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13164                                   NL80211_FLAG_NEED_RTNL,
13165         },
13166         {
13167                 .cmd = NL80211_CMD_REGISTER_FRAME,
13168                 .doit = nl80211_register_mgmt,
13169                 .policy = nl80211_policy,
13170                 .flags = GENL_UNS_ADMIN_PERM,
13171                 .internal_flags = NL80211_FLAG_NEED_WDEV |
13172                                   NL80211_FLAG_NEED_RTNL,
13173         },
13174         {
13175                 .cmd = NL80211_CMD_FRAME,
13176                 .doit = nl80211_tx_mgmt,
13177                 .policy = nl80211_policy,
13178                 .flags = GENL_UNS_ADMIN_PERM,
13179                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13180                                   NL80211_FLAG_NEED_RTNL,
13181         },
13182         {
13183                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
13184                 .doit = nl80211_tx_mgmt_cancel_wait,
13185                 .policy = nl80211_policy,
13186                 .flags = GENL_UNS_ADMIN_PERM,
13187                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13188                                   NL80211_FLAG_NEED_RTNL,
13189         },
13190         {
13191                 .cmd = NL80211_CMD_SET_POWER_SAVE,
13192                 .doit = nl80211_set_power_save,
13193                 .policy = nl80211_policy,
13194                 .flags = GENL_UNS_ADMIN_PERM,
13195                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13196                                   NL80211_FLAG_NEED_RTNL,
13197         },
13198         {
13199                 .cmd = NL80211_CMD_GET_POWER_SAVE,
13200                 .doit = nl80211_get_power_save,
13201                 .policy = nl80211_policy,
13202                 /* can be retrieved by unprivileged users */
13203                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13204                                   NL80211_FLAG_NEED_RTNL,
13205         },
13206         {
13207                 .cmd = NL80211_CMD_SET_CQM,
13208                 .doit = nl80211_set_cqm,
13209                 .policy = nl80211_policy,
13210                 .flags = GENL_UNS_ADMIN_PERM,
13211                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13212                                   NL80211_FLAG_NEED_RTNL,
13213         },
13214         {
13215                 .cmd = NL80211_CMD_SET_CHANNEL,
13216                 .doit = nl80211_set_channel,
13217                 .policy = nl80211_policy,
13218                 .flags = GENL_UNS_ADMIN_PERM,
13219                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13220                                   NL80211_FLAG_NEED_RTNL,
13221         },
13222         {
13223                 .cmd = NL80211_CMD_SET_WDS_PEER,
13224                 .doit = nl80211_set_wds_peer,
13225                 .policy = nl80211_policy,
13226                 .flags = GENL_UNS_ADMIN_PERM,
13227                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13228                                   NL80211_FLAG_NEED_RTNL,
13229         },
13230         {
13231                 .cmd = NL80211_CMD_JOIN_MESH,
13232                 .doit = nl80211_join_mesh,
13233                 .policy = nl80211_policy,
13234                 .flags = GENL_UNS_ADMIN_PERM,
13235                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13236                                   NL80211_FLAG_NEED_RTNL,
13237         },
13238         {
13239                 .cmd = NL80211_CMD_LEAVE_MESH,
13240                 .doit = nl80211_leave_mesh,
13241                 .policy = nl80211_policy,
13242                 .flags = GENL_UNS_ADMIN_PERM,
13243                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13244                                   NL80211_FLAG_NEED_RTNL,
13245         },
13246         {
13247                 .cmd = NL80211_CMD_JOIN_OCB,
13248                 .doit = nl80211_join_ocb,
13249                 .policy = nl80211_policy,
13250                 .flags = GENL_UNS_ADMIN_PERM,
13251                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13252                                   NL80211_FLAG_NEED_RTNL,
13253         },
13254         {
13255                 .cmd = NL80211_CMD_LEAVE_OCB,
13256                 .doit = nl80211_leave_ocb,
13257                 .policy = nl80211_policy,
13258                 .flags = GENL_UNS_ADMIN_PERM,
13259                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13260                                   NL80211_FLAG_NEED_RTNL,
13261         },
13262 #ifdef CONFIG_PM
13263         {
13264                 .cmd = NL80211_CMD_GET_WOWLAN,
13265                 .doit = nl80211_get_wowlan,
13266                 .policy = nl80211_policy,
13267                 /* can be retrieved by unprivileged users */
13268                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13269                                   NL80211_FLAG_NEED_RTNL,
13270         },
13271         {
13272                 .cmd = NL80211_CMD_SET_WOWLAN,
13273                 .doit = nl80211_set_wowlan,
13274                 .policy = nl80211_policy,
13275                 .flags = GENL_UNS_ADMIN_PERM,
13276                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13277                                   NL80211_FLAG_NEED_RTNL,
13278         },
13279 #endif
13280         {
13281                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
13282                 .doit = nl80211_set_rekey_data,
13283                 .policy = nl80211_policy,
13284                 .flags = GENL_UNS_ADMIN_PERM,
13285                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13286                                   NL80211_FLAG_NEED_RTNL |
13287                                   NL80211_FLAG_CLEAR_SKB,
13288         },
13289         {
13290                 .cmd = NL80211_CMD_TDLS_MGMT,
13291                 .doit = nl80211_tdls_mgmt,
13292                 .policy = nl80211_policy,
13293                 .flags = GENL_UNS_ADMIN_PERM,
13294                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13295                                   NL80211_FLAG_NEED_RTNL,
13296         },
13297         {
13298                 .cmd = NL80211_CMD_TDLS_OPER,
13299                 .doit = nl80211_tdls_oper,
13300                 .policy = nl80211_policy,
13301                 .flags = GENL_UNS_ADMIN_PERM,
13302                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13303                                   NL80211_FLAG_NEED_RTNL,
13304         },
13305         {
13306                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
13307                 .doit = nl80211_register_unexpected_frame,
13308                 .policy = nl80211_policy,
13309                 .flags = GENL_UNS_ADMIN_PERM,
13310                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13311                                   NL80211_FLAG_NEED_RTNL,
13312         },
13313         {
13314                 .cmd = NL80211_CMD_PROBE_CLIENT,
13315                 .doit = nl80211_probe_client,
13316                 .policy = nl80211_policy,
13317                 .flags = GENL_UNS_ADMIN_PERM,
13318                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13319                                   NL80211_FLAG_NEED_RTNL,
13320         },
13321         {
13322                 .cmd = NL80211_CMD_REGISTER_BEACONS,
13323                 .doit = nl80211_register_beacons,
13324                 .policy = nl80211_policy,
13325                 .flags = GENL_UNS_ADMIN_PERM,
13326                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13327                                   NL80211_FLAG_NEED_RTNL,
13328         },
13329         {
13330                 .cmd = NL80211_CMD_SET_NOACK_MAP,
13331                 .doit = nl80211_set_noack_map,
13332                 .policy = nl80211_policy,
13333                 .flags = GENL_UNS_ADMIN_PERM,
13334                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13335                                   NL80211_FLAG_NEED_RTNL,
13336         },
13337         {
13338                 .cmd = NL80211_CMD_START_P2P_DEVICE,
13339                 .doit = nl80211_start_p2p_device,
13340                 .policy = nl80211_policy,
13341                 .flags = GENL_UNS_ADMIN_PERM,
13342                 .internal_flags = NL80211_FLAG_NEED_WDEV |
13343                                   NL80211_FLAG_NEED_RTNL,
13344         },
13345         {
13346                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
13347                 .doit = nl80211_stop_p2p_device,
13348                 .policy = nl80211_policy,
13349                 .flags = GENL_UNS_ADMIN_PERM,
13350                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13351                                   NL80211_FLAG_NEED_RTNL,
13352         },
13353         {
13354                 .cmd = NL80211_CMD_START_NAN,
13355                 .doit = nl80211_start_nan,
13356                 .policy = nl80211_policy,
13357                 .flags = GENL_ADMIN_PERM,
13358                 .internal_flags = NL80211_FLAG_NEED_WDEV |
13359                                   NL80211_FLAG_NEED_RTNL,
13360         },
13361         {
13362                 .cmd = NL80211_CMD_STOP_NAN,
13363                 .doit = nl80211_stop_nan,
13364                 .policy = nl80211_policy,
13365                 .flags = GENL_ADMIN_PERM,
13366                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13367                                   NL80211_FLAG_NEED_RTNL,
13368         },
13369         {
13370                 .cmd = NL80211_CMD_ADD_NAN_FUNCTION,
13371                 .doit = nl80211_nan_add_func,
13372                 .policy = nl80211_policy,
13373                 .flags = GENL_ADMIN_PERM,
13374                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13375                                   NL80211_FLAG_NEED_RTNL,
13376         },
13377         {
13378                 .cmd = NL80211_CMD_DEL_NAN_FUNCTION,
13379                 .doit = nl80211_nan_del_func,
13380                 .policy = nl80211_policy,
13381                 .flags = GENL_ADMIN_PERM,
13382                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13383                                   NL80211_FLAG_NEED_RTNL,
13384         },
13385         {
13386                 .cmd = NL80211_CMD_CHANGE_NAN_CONFIG,
13387                 .doit = nl80211_nan_change_config,
13388                 .policy = nl80211_policy,
13389                 .flags = GENL_ADMIN_PERM,
13390                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13391                                   NL80211_FLAG_NEED_RTNL,
13392         },
13393         {
13394                 .cmd = NL80211_CMD_SET_MCAST_RATE,
13395                 .doit = nl80211_set_mcast_rate,
13396                 .policy = nl80211_policy,
13397                 .flags = GENL_UNS_ADMIN_PERM,
13398                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13399                                   NL80211_FLAG_NEED_RTNL,
13400         },
13401         {
13402                 .cmd = NL80211_CMD_SET_MAC_ACL,
13403                 .doit = nl80211_set_mac_acl,
13404                 .policy = nl80211_policy,
13405                 .flags = GENL_UNS_ADMIN_PERM,
13406                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13407                                   NL80211_FLAG_NEED_RTNL,
13408         },
13409         {
13410                 .cmd = NL80211_CMD_RADAR_DETECT,
13411                 .doit = nl80211_start_radar_detection,
13412                 .policy = nl80211_policy,
13413                 .flags = GENL_UNS_ADMIN_PERM,
13414                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13415                                   NL80211_FLAG_NEED_RTNL,
13416         },
13417         {
13418                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
13419                 .doit = nl80211_get_protocol_features,
13420                 .policy = nl80211_policy,
13421         },
13422         {
13423                 .cmd = NL80211_CMD_UPDATE_FT_IES,
13424                 .doit = nl80211_update_ft_ies,
13425                 .policy = nl80211_policy,
13426                 .flags = GENL_UNS_ADMIN_PERM,
13427                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13428                                   NL80211_FLAG_NEED_RTNL,
13429         },
13430         {
13431                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
13432                 .doit = nl80211_crit_protocol_start,
13433                 .policy = nl80211_policy,
13434                 .flags = GENL_UNS_ADMIN_PERM,
13435                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13436                                   NL80211_FLAG_NEED_RTNL,
13437         },
13438         {
13439                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
13440                 .doit = nl80211_crit_protocol_stop,
13441                 .policy = nl80211_policy,
13442                 .flags = GENL_UNS_ADMIN_PERM,
13443                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13444                                   NL80211_FLAG_NEED_RTNL,
13445         },
13446         {
13447                 .cmd = NL80211_CMD_GET_COALESCE,
13448                 .doit = nl80211_get_coalesce,
13449                 .policy = nl80211_policy,
13450                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13451                                   NL80211_FLAG_NEED_RTNL,
13452         },
13453         {
13454                 .cmd = NL80211_CMD_SET_COALESCE,
13455                 .doit = nl80211_set_coalesce,
13456                 .policy = nl80211_policy,
13457                 .flags = GENL_UNS_ADMIN_PERM,
13458                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13459                                   NL80211_FLAG_NEED_RTNL,
13460         },
13461         {
13462                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
13463                 .doit = nl80211_channel_switch,
13464                 .policy = nl80211_policy,
13465                 .flags = GENL_UNS_ADMIN_PERM,
13466                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13467                                   NL80211_FLAG_NEED_RTNL,
13468         },
13469         {
13470                 .cmd = NL80211_CMD_VENDOR,
13471                 .doit = nl80211_vendor_cmd,
13472                 .dumpit = nl80211_vendor_cmd_dump,
13473                 .policy = nl80211_policy,
13474                 .flags = GENL_UNS_ADMIN_PERM,
13475                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13476                                   NL80211_FLAG_NEED_RTNL,
13477         },
13478         {
13479                 .cmd = NL80211_CMD_SET_QOS_MAP,
13480                 .doit = nl80211_set_qos_map,
13481                 .policy = nl80211_policy,
13482                 .flags = GENL_UNS_ADMIN_PERM,
13483                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13484                                   NL80211_FLAG_NEED_RTNL,
13485         },
13486         {
13487                 .cmd = NL80211_CMD_ADD_TX_TS,
13488                 .doit = nl80211_add_tx_ts,
13489                 .policy = nl80211_policy,
13490                 .flags = GENL_UNS_ADMIN_PERM,
13491                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13492                                   NL80211_FLAG_NEED_RTNL,
13493         },
13494         {
13495                 .cmd = NL80211_CMD_DEL_TX_TS,
13496                 .doit = nl80211_del_tx_ts,
13497                 .policy = nl80211_policy,
13498                 .flags = GENL_UNS_ADMIN_PERM,
13499                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13500                                   NL80211_FLAG_NEED_RTNL,
13501         },
13502         {
13503                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
13504                 .doit = nl80211_tdls_channel_switch,
13505                 .policy = nl80211_policy,
13506                 .flags = GENL_UNS_ADMIN_PERM,
13507                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13508                                   NL80211_FLAG_NEED_RTNL,
13509         },
13510         {
13511                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
13512                 .doit = nl80211_tdls_cancel_channel_switch,
13513                 .policy = nl80211_policy,
13514                 .flags = GENL_UNS_ADMIN_PERM,
13515                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13516                                   NL80211_FLAG_NEED_RTNL,
13517         },
13518         {
13519                 .cmd = NL80211_CMD_SET_MULTICAST_TO_UNICAST,
13520                 .doit = nl80211_set_multicast_to_unicast,
13521                 .policy = nl80211_policy,
13522                 .flags = GENL_UNS_ADMIN_PERM,
13523                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13524                                   NL80211_FLAG_NEED_RTNL,
13525         },
13526         {
13527                 .cmd = NL80211_CMD_SET_PMK,
13528                 .doit = nl80211_set_pmk,
13529                 .policy = nl80211_policy,
13530                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13531                                   NL80211_FLAG_NEED_RTNL,
13532         },
13533         {
13534                 .cmd = NL80211_CMD_DEL_PMK,
13535                 .doit = nl80211_del_pmk,
13536                 .policy = nl80211_policy,
13537                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13538                                   NL80211_FLAG_NEED_RTNL,
13539         },
13540         {
13541                 .cmd = NL80211_CMD_EXTERNAL_AUTH,
13542                 .doit = nl80211_external_auth,
13543                 .policy = nl80211_policy,
13544                 .flags = GENL_ADMIN_PERM,
13545                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13546                                   NL80211_FLAG_NEED_RTNL,
13547         },
13548         {
13549                 .cmd = NL80211_CMD_CONTROL_PORT_FRAME,
13550                 .doit = nl80211_tx_control_port,
13551                 .policy = nl80211_policy,
13552                 .flags = GENL_UNS_ADMIN_PERM,
13553                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13554                                   NL80211_FLAG_NEED_RTNL,
13555         },
13556 };
13557
13558 static struct genl_family nl80211_fam __ro_after_init = {
13559         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
13560         .hdrsize = 0,                   /* no private header */
13561         .version = 1,                   /* no particular meaning now */
13562         .maxattr = NL80211_ATTR_MAX,
13563         .netnsok = true,
13564         .pre_doit = nl80211_pre_doit,
13565         .post_doit = nl80211_post_doit,
13566         .module = THIS_MODULE,
13567         .ops = nl80211_ops,
13568         .n_ops = ARRAY_SIZE(nl80211_ops),
13569         .mcgrps = nl80211_mcgrps,
13570         .n_mcgrps = ARRAY_SIZE(nl80211_mcgrps),
13571 };
13572
13573 /* notification functions */
13574
13575 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
13576                           enum nl80211_commands cmd)
13577 {
13578         struct sk_buff *msg;
13579         struct nl80211_dump_wiphy_state state = {};
13580
13581         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
13582                 cmd != NL80211_CMD_DEL_WIPHY);
13583
13584         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13585         if (!msg)
13586                 return;
13587
13588         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
13589                 nlmsg_free(msg);
13590                 return;
13591         }
13592
13593         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13594                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
13595 }
13596
13597 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
13598                                 struct wireless_dev *wdev,
13599                                 enum nl80211_commands cmd)
13600 {
13601         struct sk_buff *msg;
13602
13603         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
13604                 cmd != NL80211_CMD_DEL_INTERFACE);
13605
13606         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13607         if (!msg)
13608                 return;
13609
13610         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
13611                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
13612                 nlmsg_free(msg);
13613                 return;
13614         }
13615
13616         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13617                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
13618 }
13619
13620 static int nl80211_add_scan_req(struct sk_buff *msg,
13621                                 struct cfg80211_registered_device *rdev)
13622 {
13623         struct cfg80211_scan_request *req = rdev->scan_req;
13624         struct nlattr *nest;
13625         int i;
13626
13627         if (WARN_ON(!req))
13628                 return 0;
13629
13630         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
13631         if (!nest)
13632                 goto nla_put_failure;
13633         for (i = 0; i < req->n_ssids; i++) {
13634                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
13635                         goto nla_put_failure;
13636         }
13637         nla_nest_end(msg, nest);
13638
13639         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
13640         if (!nest)
13641                 goto nla_put_failure;
13642         for (i = 0; i < req->n_channels; i++) {
13643                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
13644                         goto nla_put_failure;
13645         }
13646         nla_nest_end(msg, nest);
13647
13648         if (req->ie &&
13649             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
13650                 goto nla_put_failure;
13651
13652         if (req->flags &&
13653             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
13654                 goto nla_put_failure;
13655
13656         if (req->info.scan_start_tsf &&
13657             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
13658                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
13659              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
13660                      req->info.tsf_bssid)))
13661                 goto nla_put_failure;
13662
13663         return 0;
13664  nla_put_failure:
13665         return -ENOBUFS;
13666 }
13667
13668 static int nl80211_prep_scan_msg(struct sk_buff *msg,
13669                                  struct cfg80211_registered_device *rdev,
13670                                  struct wireless_dev *wdev,
13671                                  u32 portid, u32 seq, int flags,
13672                                  u32 cmd)
13673 {
13674         void *hdr;
13675
13676         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
13677         if (!hdr)
13678                 return -1;
13679
13680         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13681             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13682                                          wdev->netdev->ifindex)) ||
13683             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13684                               NL80211_ATTR_PAD))
13685                 goto nla_put_failure;
13686
13687         /* ignore errors and send incomplete event anyway */
13688         nl80211_add_scan_req(msg, rdev);
13689
13690         genlmsg_end(msg, hdr);
13691         return 0;
13692
13693  nla_put_failure:
13694         genlmsg_cancel(msg, hdr);
13695         return -EMSGSIZE;
13696 }
13697
13698 static int
13699 nl80211_prep_sched_scan_msg(struct sk_buff *msg,
13700                             struct cfg80211_sched_scan_request *req, u32 cmd)
13701 {
13702         void *hdr;
13703
13704         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13705         if (!hdr)
13706                 return -1;
13707
13708         if (nla_put_u32(msg, NL80211_ATTR_WIPHY,
13709                         wiphy_to_rdev(req->wiphy)->wiphy_idx) ||
13710             nla_put_u32(msg, NL80211_ATTR_IFINDEX, req->dev->ifindex) ||
13711             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->reqid,
13712                               NL80211_ATTR_PAD))
13713                 goto nla_put_failure;
13714
13715         genlmsg_end(msg, hdr);
13716         return 0;
13717
13718  nla_put_failure:
13719         genlmsg_cancel(msg, hdr);
13720         return -EMSGSIZE;
13721 }
13722
13723 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
13724                              struct wireless_dev *wdev)
13725 {
13726         struct sk_buff *msg;
13727
13728         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13729         if (!msg)
13730                 return;
13731
13732         if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
13733                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
13734                 nlmsg_free(msg);
13735                 return;
13736         }
13737
13738         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13739                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13740 }
13741
13742 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
13743                                        struct wireless_dev *wdev, bool aborted)
13744 {
13745         struct sk_buff *msg;
13746
13747         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13748         if (!msg)
13749                 return NULL;
13750
13751         if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
13752                                   aborted ? NL80211_CMD_SCAN_ABORTED :
13753                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
13754                 nlmsg_free(msg);
13755                 return NULL;
13756         }
13757
13758         return msg;
13759 }
13760
13761 /* send message created by nl80211_build_scan_msg() */
13762 void nl80211_send_scan_msg(struct cfg80211_registered_device *rdev,
13763                            struct sk_buff *msg)
13764 {
13765         if (!msg)
13766                 return;
13767
13768         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13769                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13770 }
13771
13772 void nl80211_send_sched_scan(struct cfg80211_sched_scan_request *req, u32 cmd)
13773 {
13774         struct sk_buff *msg;
13775
13776         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13777         if (!msg)
13778                 return;
13779
13780         if (nl80211_prep_sched_scan_msg(msg, req, cmd) < 0) {
13781                 nlmsg_free(msg);
13782                 return;
13783         }
13784
13785         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(req->wiphy), msg, 0,
13786                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13787 }
13788
13789 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
13790                                           struct regulatory_request *request)
13791 {
13792         /* Userspace can always count this one always being set */
13793         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
13794                 goto nla_put_failure;
13795
13796         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
13797                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13798                                NL80211_REGDOM_TYPE_WORLD))
13799                         goto nla_put_failure;
13800         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
13801                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13802                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
13803                         goto nla_put_failure;
13804         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
13805                    request->intersect) {
13806                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13807                                NL80211_REGDOM_TYPE_INTERSECTION))
13808                         goto nla_put_failure;
13809         } else {
13810                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13811                                NL80211_REGDOM_TYPE_COUNTRY) ||
13812                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
13813                                    request->alpha2))
13814                         goto nla_put_failure;
13815         }
13816
13817         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
13818                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
13819
13820                 if (wiphy &&
13821                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
13822                         goto nla_put_failure;
13823
13824                 if (wiphy &&
13825                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
13826                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
13827                         goto nla_put_failure;
13828         }
13829
13830         return true;
13831
13832 nla_put_failure:
13833         return false;
13834 }
13835
13836 /*
13837  * This can happen on global regulatory changes or device specific settings
13838  * based on custom regulatory domains.
13839  */
13840 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
13841                                      struct regulatory_request *request)
13842 {
13843         struct sk_buff *msg;
13844         void *hdr;
13845
13846         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13847         if (!msg)
13848                 return;
13849
13850         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
13851         if (!hdr) {
13852                 nlmsg_free(msg);
13853                 return;
13854         }
13855
13856         if (nl80211_reg_change_event_fill(msg, request) == false)
13857                 goto nla_put_failure;
13858
13859         genlmsg_end(msg, hdr);
13860
13861         rcu_read_lock();
13862         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
13863                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
13864         rcu_read_unlock();
13865
13866         return;
13867
13868 nla_put_failure:
13869         nlmsg_free(msg);
13870 }
13871
13872 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
13873                                     struct net_device *netdev,
13874                                     const u8 *buf, size_t len,
13875                                     enum nl80211_commands cmd, gfp_t gfp,
13876                                     int uapsd_queues)
13877 {
13878         struct sk_buff *msg;
13879         void *hdr;
13880
13881         msg = nlmsg_new(100 + len, gfp);
13882         if (!msg)
13883                 return;
13884
13885         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13886         if (!hdr) {
13887                 nlmsg_free(msg);
13888                 return;
13889         }
13890
13891         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13892             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13893             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
13894                 goto nla_put_failure;
13895
13896         if (uapsd_queues >= 0) {
13897                 struct nlattr *nla_wmm =
13898                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
13899                 if (!nla_wmm)
13900                         goto nla_put_failure;
13901
13902                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
13903                                uapsd_queues))
13904                         goto nla_put_failure;
13905
13906                 nla_nest_end(msg, nla_wmm);
13907         }
13908
13909         genlmsg_end(msg, hdr);
13910
13911         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13912                                 NL80211_MCGRP_MLME, gfp);
13913         return;
13914
13915  nla_put_failure:
13916         nlmsg_free(msg);
13917 }
13918
13919 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
13920                           struct net_device *netdev, const u8 *buf,
13921                           size_t len, gfp_t gfp)
13922 {
13923         nl80211_send_mlme_event(rdev, netdev, buf, len,
13924                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
13925 }
13926
13927 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
13928                            struct net_device *netdev, const u8 *buf,
13929                            size_t len, gfp_t gfp, int uapsd_queues)
13930 {
13931         nl80211_send_mlme_event(rdev, netdev, buf, len,
13932                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
13933 }
13934
13935 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
13936                          struct net_device *netdev, const u8 *buf,
13937                          size_t len, gfp_t gfp)
13938 {
13939         nl80211_send_mlme_event(rdev, netdev, buf, len,
13940                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
13941 }
13942
13943 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
13944                            struct net_device *netdev, const u8 *buf,
13945                            size_t len, gfp_t gfp)
13946 {
13947         nl80211_send_mlme_event(rdev, netdev, buf, len,
13948                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
13949 }
13950
13951 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
13952                                   size_t len)
13953 {
13954         struct wireless_dev *wdev = dev->ieee80211_ptr;
13955         struct wiphy *wiphy = wdev->wiphy;
13956         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13957         const struct ieee80211_mgmt *mgmt = (void *)buf;
13958         u32 cmd;
13959
13960         if (WARN_ON(len < 2))
13961                 return;
13962
13963         if (ieee80211_is_deauth(mgmt->frame_control))
13964                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
13965         else
13966                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
13967
13968         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
13969         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
13970 }
13971 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
13972
13973 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
13974                                       struct net_device *netdev, int cmd,
13975                                       const u8 *addr, gfp_t gfp)
13976 {
13977         struct sk_buff *msg;
13978         void *hdr;
13979
13980         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13981         if (!msg)
13982                 return;
13983
13984         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13985         if (!hdr) {
13986                 nlmsg_free(msg);
13987                 return;
13988         }
13989
13990         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13991             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13992             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
13993             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
13994                 goto nla_put_failure;
13995
13996         genlmsg_end(msg, hdr);
13997
13998         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13999                                 NL80211_MCGRP_MLME, gfp);
14000         return;
14001
14002  nla_put_failure:
14003         nlmsg_free(msg);
14004 }
14005
14006 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
14007                                struct net_device *netdev, const u8 *addr,
14008                                gfp_t gfp)
14009 {
14010         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
14011                                   addr, gfp);
14012 }
14013
14014 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
14015                                 struct net_device *netdev, const u8 *addr,
14016                                 gfp_t gfp)
14017 {
14018         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
14019                                   addr, gfp);
14020 }
14021
14022 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
14023                                  struct net_device *netdev,
14024                                  struct cfg80211_connect_resp_params *cr,
14025                                  gfp_t gfp)
14026 {
14027         struct sk_buff *msg;
14028         void *hdr;
14029
14030         msg = nlmsg_new(100 + cr->req_ie_len + cr->resp_ie_len +
14031                         cr->fils_kek_len + cr->pmk_len +
14032                         (cr->pmkid ? WLAN_PMKID_LEN : 0), gfp);
14033         if (!msg)
14034                 return;
14035
14036         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
14037         if (!hdr) {
14038                 nlmsg_free(msg);
14039                 return;
14040         }
14041
14042         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14043             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14044             (cr->bssid &&
14045              nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, cr->bssid)) ||
14046             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
14047                         cr->status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
14048                         cr->status) ||
14049             (cr->status < 0 &&
14050              (nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
14051               nla_put_u32(msg, NL80211_ATTR_TIMEOUT_REASON,
14052                           cr->timeout_reason))) ||
14053             (cr->req_ie &&
14054              nla_put(msg, NL80211_ATTR_REQ_IE, cr->req_ie_len, cr->req_ie)) ||
14055             (cr->resp_ie &&
14056              nla_put(msg, NL80211_ATTR_RESP_IE, cr->resp_ie_len,
14057                      cr->resp_ie)) ||
14058             (cr->update_erp_next_seq_num &&
14059              nla_put_u16(msg, NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM,
14060                          cr->fils_erp_next_seq_num)) ||
14061             (cr->status == WLAN_STATUS_SUCCESS &&
14062              ((cr->fils_kek &&
14063                nla_put(msg, NL80211_ATTR_FILS_KEK, cr->fils_kek_len,
14064                        cr->fils_kek)) ||
14065               (cr->pmk &&
14066                nla_put(msg, NL80211_ATTR_PMK, cr->pmk_len, cr->pmk)) ||
14067               (cr->pmkid &&
14068                nla_put(msg, NL80211_ATTR_PMKID, WLAN_PMKID_LEN, cr->pmkid)))))
14069                 goto nla_put_failure;
14070
14071         genlmsg_end(msg, hdr);
14072
14073         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14074                                 NL80211_MCGRP_MLME, gfp);
14075         return;
14076
14077  nla_put_failure:
14078         nlmsg_free(msg);
14079 }
14080
14081 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
14082                          struct net_device *netdev,
14083                          struct cfg80211_roam_info *info, gfp_t gfp)
14084 {
14085         struct sk_buff *msg;
14086         void *hdr;
14087         const u8 *bssid = info->bss ? info->bss->bssid : info->bssid;
14088
14089         msg = nlmsg_new(100 + info->req_ie_len + info->resp_ie_len, gfp);
14090         if (!msg)
14091                 return;
14092
14093         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
14094         if (!hdr) {
14095                 nlmsg_free(msg);
14096                 return;
14097         }
14098
14099         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14100             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14101             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
14102             (info->req_ie &&
14103              nla_put(msg, NL80211_ATTR_REQ_IE, info->req_ie_len,
14104                      info->req_ie)) ||
14105             (info->resp_ie &&
14106              nla_put(msg, NL80211_ATTR_RESP_IE, info->resp_ie_len,
14107                      info->resp_ie)))
14108                 goto nla_put_failure;
14109
14110         genlmsg_end(msg, hdr);
14111
14112         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14113                                 NL80211_MCGRP_MLME, gfp);
14114         return;
14115
14116  nla_put_failure:
14117         nlmsg_free(msg);
14118 }
14119
14120 void nl80211_send_port_authorized(struct cfg80211_registered_device *rdev,
14121                                   struct net_device *netdev, const u8 *bssid)
14122 {
14123         struct sk_buff *msg;
14124         void *hdr;
14125
14126         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
14127         if (!msg)
14128                 return;
14129
14130         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PORT_AUTHORIZED);
14131         if (!hdr) {
14132                 nlmsg_free(msg);
14133                 return;
14134         }
14135
14136         if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
14137                 goto nla_put_failure;
14138
14139         genlmsg_end(msg, hdr);
14140
14141         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14142                                 NL80211_MCGRP_MLME, GFP_KERNEL);
14143         return;
14144
14145  nla_put_failure:
14146         nlmsg_free(msg);
14147 }
14148
14149 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
14150                                struct net_device *netdev, u16 reason,
14151                                const u8 *ie, size_t ie_len, bool from_ap)
14152 {
14153         struct sk_buff *msg;
14154         void *hdr;
14155
14156         msg = nlmsg_new(100 + ie_len, GFP_KERNEL);
14157         if (!msg)
14158                 return;
14159
14160         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
14161         if (!hdr) {
14162                 nlmsg_free(msg);
14163                 return;
14164         }
14165
14166         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14167             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14168             (reason &&
14169              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
14170             (from_ap &&
14171              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
14172             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
14173                 goto nla_put_failure;
14174
14175         genlmsg_end(msg, hdr);
14176
14177         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14178                                 NL80211_MCGRP_MLME, GFP_KERNEL);
14179         return;
14180
14181  nla_put_failure:
14182         nlmsg_free(msg);
14183 }
14184
14185 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
14186                              struct net_device *netdev, const u8 *bssid,
14187                              gfp_t gfp)
14188 {
14189         struct sk_buff *msg;
14190         void *hdr;
14191
14192         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14193         if (!msg)
14194                 return;
14195
14196         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
14197         if (!hdr) {
14198                 nlmsg_free(msg);
14199                 return;
14200         }
14201
14202         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14203             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14204             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
14205                 goto nla_put_failure;
14206
14207         genlmsg_end(msg, hdr);
14208
14209         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14210                                 NL80211_MCGRP_MLME, gfp);
14211         return;
14212
14213  nla_put_failure:
14214         nlmsg_free(msg);
14215 }
14216
14217 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
14218                                         const u8* ie, u8 ie_len, gfp_t gfp)
14219 {
14220         struct wireless_dev *wdev = dev->ieee80211_ptr;
14221         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14222         struct sk_buff *msg;
14223         void *hdr;
14224
14225         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
14226                 return;
14227
14228         trace_cfg80211_notify_new_peer_candidate(dev, addr);
14229
14230         msg = nlmsg_new(100 + ie_len, gfp);
14231         if (!msg)
14232                 return;
14233
14234         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
14235         if (!hdr) {
14236                 nlmsg_free(msg);
14237                 return;
14238         }
14239
14240         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14241             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14242             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
14243             (ie_len && ie &&
14244              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
14245                 goto nla_put_failure;
14246
14247         genlmsg_end(msg, hdr);
14248
14249         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14250                                 NL80211_MCGRP_MLME, gfp);
14251         return;
14252
14253  nla_put_failure:
14254         nlmsg_free(msg);
14255 }
14256 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
14257
14258 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
14259                                  struct net_device *netdev, const u8 *addr,
14260                                  enum nl80211_key_type key_type, int key_id,
14261                                  const u8 *tsc, gfp_t gfp)
14262 {
14263         struct sk_buff *msg;
14264         void *hdr;
14265
14266         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14267         if (!msg)
14268                 return;
14269
14270         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
14271         if (!hdr) {
14272                 nlmsg_free(msg);
14273                 return;
14274         }
14275
14276         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14277             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14278             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
14279             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
14280             (key_id != -1 &&
14281              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
14282             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
14283                 goto nla_put_failure;
14284
14285         genlmsg_end(msg, hdr);
14286
14287         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14288                                 NL80211_MCGRP_MLME, gfp);
14289         return;
14290
14291  nla_put_failure:
14292         nlmsg_free(msg);
14293 }
14294
14295 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
14296                                     struct ieee80211_channel *channel_before,
14297                                     struct ieee80211_channel *channel_after)
14298 {
14299         struct sk_buff *msg;
14300         void *hdr;
14301         struct nlattr *nl_freq;
14302
14303         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
14304         if (!msg)
14305                 return;
14306
14307         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
14308         if (!hdr) {
14309                 nlmsg_free(msg);
14310                 return;
14311         }
14312
14313         /*
14314          * Since we are applying the beacon hint to a wiphy we know its
14315          * wiphy_idx is valid
14316          */
14317         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
14318                 goto nla_put_failure;
14319
14320         /* Before */
14321         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
14322         if (!nl_freq)
14323                 goto nla_put_failure;
14324         if (nl80211_msg_put_channel(msg, channel_before, false))
14325                 goto nla_put_failure;
14326         nla_nest_end(msg, nl_freq);
14327
14328         /* After */
14329         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
14330         if (!nl_freq)
14331                 goto nla_put_failure;
14332         if (nl80211_msg_put_channel(msg, channel_after, false))
14333                 goto nla_put_failure;
14334         nla_nest_end(msg, nl_freq);
14335
14336         genlmsg_end(msg, hdr);
14337
14338         rcu_read_lock();
14339         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
14340                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
14341         rcu_read_unlock();
14342
14343         return;
14344
14345 nla_put_failure:
14346         nlmsg_free(msg);
14347 }
14348
14349 static void nl80211_send_remain_on_chan_event(
14350         int cmd, struct cfg80211_registered_device *rdev,
14351         struct wireless_dev *wdev, u64 cookie,
14352         struct ieee80211_channel *chan,
14353         unsigned int duration, gfp_t gfp)
14354 {
14355         struct sk_buff *msg;
14356         void *hdr;
14357
14358         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14359         if (!msg)
14360                 return;
14361
14362         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
14363         if (!hdr) {
14364                 nlmsg_free(msg);
14365                 return;
14366         }
14367
14368         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14369             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14370                                          wdev->netdev->ifindex)) ||
14371             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14372                               NL80211_ATTR_PAD) ||
14373             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
14374             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
14375                         NL80211_CHAN_NO_HT) ||
14376             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14377                               NL80211_ATTR_PAD))
14378                 goto nla_put_failure;
14379
14380         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
14381             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
14382                 goto nla_put_failure;
14383
14384         genlmsg_end(msg, hdr);
14385
14386         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14387                                 NL80211_MCGRP_MLME, gfp);
14388         return;
14389
14390  nla_put_failure:
14391         nlmsg_free(msg);
14392 }
14393
14394 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
14395                                struct ieee80211_channel *chan,
14396                                unsigned int duration, gfp_t gfp)
14397 {
14398         struct wiphy *wiphy = wdev->wiphy;
14399         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14400
14401         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
14402         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
14403                                           rdev, wdev, cookie, chan,
14404                                           duration, gfp);
14405 }
14406 EXPORT_SYMBOL(cfg80211_ready_on_channel);
14407
14408 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
14409                                         struct ieee80211_channel *chan,
14410                                         gfp_t gfp)
14411 {
14412         struct wiphy *wiphy = wdev->wiphy;
14413         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14414
14415         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
14416         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
14417                                           rdev, wdev, cookie, chan, 0, gfp);
14418 }
14419 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
14420
14421 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
14422                       struct station_info *sinfo, gfp_t gfp)
14423 {
14424         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
14425         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14426         struct sk_buff *msg;
14427
14428         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
14429
14430         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14431         if (!msg)
14432                 return;
14433
14434         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
14435                                  rdev, dev, mac_addr, sinfo) < 0) {
14436                 nlmsg_free(msg);
14437                 return;
14438         }
14439
14440         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14441                                 NL80211_MCGRP_MLME, gfp);
14442 }
14443 EXPORT_SYMBOL(cfg80211_new_sta);
14444
14445 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
14446                             struct station_info *sinfo, gfp_t gfp)
14447 {
14448         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
14449         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14450         struct sk_buff *msg;
14451         struct station_info empty_sinfo = {};
14452
14453         if (!sinfo)
14454                 sinfo = &empty_sinfo;
14455
14456         trace_cfg80211_del_sta(dev, mac_addr);
14457
14458         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14459         if (!msg)
14460                 return;
14461
14462         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
14463                                  rdev, dev, mac_addr, sinfo) < 0) {
14464                 nlmsg_free(msg);
14465                 return;
14466         }
14467
14468         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14469                                 NL80211_MCGRP_MLME, gfp);
14470 }
14471 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
14472
14473 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
14474                           enum nl80211_connect_failed_reason reason,
14475                           gfp_t gfp)
14476 {
14477         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
14478         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14479         struct sk_buff *msg;
14480         void *hdr;
14481
14482         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
14483         if (!msg)
14484                 return;
14485
14486         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
14487         if (!hdr) {
14488                 nlmsg_free(msg);
14489                 return;
14490         }
14491
14492         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14493             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
14494             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
14495                 goto nla_put_failure;
14496
14497         genlmsg_end(msg, hdr);
14498
14499         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14500                                 NL80211_MCGRP_MLME, gfp);
14501         return;
14502
14503  nla_put_failure:
14504         nlmsg_free(msg);
14505 }
14506 EXPORT_SYMBOL(cfg80211_conn_failed);
14507
14508 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
14509                                        const u8 *addr, gfp_t gfp)
14510 {
14511         struct wireless_dev *wdev = dev->ieee80211_ptr;
14512         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14513         struct sk_buff *msg;
14514         void *hdr;
14515         u32 nlportid = READ_ONCE(wdev->ap_unexpected_nlportid);
14516
14517         if (!nlportid)
14518                 return false;
14519
14520         msg = nlmsg_new(100, gfp);
14521         if (!msg)
14522                 return true;
14523
14524         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
14525         if (!hdr) {
14526                 nlmsg_free(msg);
14527                 return true;
14528         }
14529
14530         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14531             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14532             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
14533                 goto nla_put_failure;
14534
14535         genlmsg_end(msg, hdr);
14536         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14537         return true;
14538
14539  nla_put_failure:
14540         nlmsg_free(msg);
14541         return true;
14542 }
14543
14544 bool cfg80211_rx_spurious_frame(struct net_device *dev,
14545                                 const u8 *addr, gfp_t gfp)
14546 {
14547         struct wireless_dev *wdev = dev->ieee80211_ptr;
14548         bool ret;
14549
14550         trace_cfg80211_rx_spurious_frame(dev, addr);
14551
14552         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
14553                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
14554                 trace_cfg80211_return_bool(false);
14555                 return false;
14556         }
14557         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
14558                                          addr, gfp);
14559         trace_cfg80211_return_bool(ret);
14560         return ret;
14561 }
14562 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
14563
14564 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
14565                                         const u8 *addr, gfp_t gfp)
14566 {
14567         struct wireless_dev *wdev = dev->ieee80211_ptr;
14568         bool ret;
14569
14570         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
14571
14572         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
14573                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
14574                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
14575                 trace_cfg80211_return_bool(false);
14576                 return false;
14577         }
14578         ret = __nl80211_unexpected_frame(dev,
14579                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
14580                                          addr, gfp);
14581         trace_cfg80211_return_bool(ret);
14582         return ret;
14583 }
14584 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
14585
14586 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
14587                       struct wireless_dev *wdev, u32 nlportid,
14588                       int freq, int sig_dbm,
14589                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
14590 {
14591         struct net_device *netdev = wdev->netdev;
14592         struct sk_buff *msg;
14593         void *hdr;
14594
14595         msg = nlmsg_new(100 + len, gfp);
14596         if (!msg)
14597                 return -ENOMEM;
14598
14599         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
14600         if (!hdr) {
14601                 nlmsg_free(msg);
14602                 return -ENOMEM;
14603         }
14604
14605         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14606             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14607                                         netdev->ifindex)) ||
14608             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14609                               NL80211_ATTR_PAD) ||
14610             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
14611             (sig_dbm &&
14612              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
14613             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
14614             (flags &&
14615              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
14616                 goto nla_put_failure;
14617
14618         genlmsg_end(msg, hdr);
14619
14620         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14621
14622  nla_put_failure:
14623         nlmsg_free(msg);
14624         return -ENOBUFS;
14625 }
14626
14627 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
14628                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
14629 {
14630         struct wiphy *wiphy = wdev->wiphy;
14631         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14632         struct net_device *netdev = wdev->netdev;
14633         struct sk_buff *msg;
14634         void *hdr;
14635
14636         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
14637
14638         msg = nlmsg_new(100 + len, gfp);
14639         if (!msg)
14640                 return;
14641
14642         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
14643         if (!hdr) {
14644                 nlmsg_free(msg);
14645                 return;
14646         }
14647
14648         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14649             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14650                                    netdev->ifindex)) ||
14651             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14652                               NL80211_ATTR_PAD) ||
14653             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
14654             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14655                               NL80211_ATTR_PAD) ||
14656             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
14657                 goto nla_put_failure;
14658
14659         genlmsg_end(msg, hdr);
14660
14661         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14662                                 NL80211_MCGRP_MLME, gfp);
14663         return;
14664
14665  nla_put_failure:
14666         nlmsg_free(msg);
14667 }
14668 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
14669
14670 static int __nl80211_rx_control_port(struct net_device *dev,
14671                                      const u8 *buf, size_t len,
14672                                      const u8 *addr, u16 proto,
14673                                      bool unencrypted, gfp_t gfp)
14674 {
14675         struct wireless_dev *wdev = dev->ieee80211_ptr;
14676         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14677         struct sk_buff *msg;
14678         void *hdr;
14679         u32 nlportid = READ_ONCE(wdev->conn_owner_nlportid);
14680
14681         if (!nlportid)
14682                 return -ENOENT;
14683
14684         msg = nlmsg_new(100 + len, gfp);
14685         if (!msg)
14686                 return -ENOMEM;
14687
14688         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONTROL_PORT_FRAME);
14689         if (!hdr) {
14690                 nlmsg_free(msg);
14691                 return -ENOBUFS;
14692         }
14693
14694         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14695             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14696             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14697                               NL80211_ATTR_PAD) ||
14698             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
14699             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
14700             nla_put_u16(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE, proto) ||
14701             (unencrypted && nla_put_flag(msg,
14702                                          NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT)))
14703                 goto nla_put_failure;
14704
14705         genlmsg_end(msg, hdr);
14706
14707         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14708
14709  nla_put_failure:
14710         nlmsg_free(msg);
14711         return -ENOBUFS;
14712 }
14713
14714 bool cfg80211_rx_control_port(struct net_device *dev,
14715                               const u8 *buf, size_t len,
14716                               const u8 *addr, u16 proto, bool unencrypted)
14717 {
14718         int ret;
14719
14720         trace_cfg80211_rx_control_port(dev, buf, len, addr, proto, unencrypted);
14721         ret = __nl80211_rx_control_port(dev, buf, len, addr, proto,
14722                                         unencrypted, GFP_ATOMIC);
14723         trace_cfg80211_return_bool(ret == 0);
14724         return ret == 0;
14725 }
14726 EXPORT_SYMBOL(cfg80211_rx_control_port);
14727
14728 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
14729                                             const char *mac, gfp_t gfp)
14730 {
14731         struct wireless_dev *wdev = dev->ieee80211_ptr;
14732         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14733         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14734         void **cb;
14735
14736         if (!msg)
14737                 return NULL;
14738
14739         cb = (void **)msg->cb;
14740
14741         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
14742         if (!cb[0]) {
14743                 nlmsg_free(msg);
14744                 return NULL;
14745         }
14746
14747         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14748             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
14749                 goto nla_put_failure;
14750
14751         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
14752                 goto nla_put_failure;
14753
14754         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
14755         if (!cb[1])
14756                 goto nla_put_failure;
14757
14758         cb[2] = rdev;
14759
14760         return msg;
14761  nla_put_failure:
14762         nlmsg_free(msg);
14763         return NULL;
14764 }
14765
14766 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
14767 {
14768         void **cb = (void **)msg->cb;
14769         struct cfg80211_registered_device *rdev = cb[2];
14770
14771         nla_nest_end(msg, cb[1]);
14772         genlmsg_end(msg, cb[0]);
14773
14774         memset(msg->cb, 0, sizeof(msg->cb));
14775
14776         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14777                                 NL80211_MCGRP_MLME, gfp);
14778 }
14779
14780 void cfg80211_cqm_rssi_notify(struct net_device *dev,
14781                               enum nl80211_cqm_rssi_threshold_event rssi_event,
14782                               s32 rssi_level, gfp_t gfp)
14783 {
14784         struct sk_buff *msg;
14785         struct wireless_dev *wdev = dev->ieee80211_ptr;
14786         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14787
14788         trace_cfg80211_cqm_rssi_notify(dev, rssi_event, rssi_level);
14789
14790         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
14791                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
14792                 return;
14793
14794         if (wdev->cqm_config) {
14795                 wdev->cqm_config->last_rssi_event_value = rssi_level;
14796
14797                 cfg80211_cqm_rssi_update(rdev, dev);
14798
14799                 if (rssi_level == 0)
14800                         rssi_level = wdev->cqm_config->last_rssi_event_value;
14801         }
14802
14803         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
14804         if (!msg)
14805                 return;
14806
14807         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
14808                         rssi_event))
14809                 goto nla_put_failure;
14810
14811         if (rssi_level && nla_put_s32(msg, NL80211_ATTR_CQM_RSSI_LEVEL,
14812                                       rssi_level))
14813                 goto nla_put_failure;
14814
14815         cfg80211_send_cqm(msg, gfp);
14816
14817         return;
14818
14819  nla_put_failure:
14820         nlmsg_free(msg);
14821 }
14822 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
14823
14824 void cfg80211_cqm_txe_notify(struct net_device *dev,
14825                              const u8 *peer, u32 num_packets,
14826                              u32 rate, u32 intvl, gfp_t gfp)
14827 {
14828         struct sk_buff *msg;
14829
14830         msg = cfg80211_prepare_cqm(dev, peer, gfp);
14831         if (!msg)
14832                 return;
14833
14834         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
14835                 goto nla_put_failure;
14836
14837         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
14838                 goto nla_put_failure;
14839
14840         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
14841                 goto nla_put_failure;
14842
14843         cfg80211_send_cqm(msg, gfp);
14844         return;
14845
14846  nla_put_failure:
14847         nlmsg_free(msg);
14848 }
14849 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
14850
14851 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
14852                                  const u8 *peer, u32 num_packets, gfp_t gfp)
14853 {
14854         struct sk_buff *msg;
14855
14856         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
14857
14858         msg = cfg80211_prepare_cqm(dev, peer, gfp);
14859         if (!msg)
14860                 return;
14861
14862         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
14863                 goto nla_put_failure;
14864
14865         cfg80211_send_cqm(msg, gfp);
14866         return;
14867
14868  nla_put_failure:
14869         nlmsg_free(msg);
14870 }
14871 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
14872
14873 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
14874 {
14875         struct sk_buff *msg;
14876
14877         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
14878         if (!msg)
14879                 return;
14880
14881         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
14882                 goto nla_put_failure;
14883
14884         cfg80211_send_cqm(msg, gfp);
14885         return;
14886
14887  nla_put_failure:
14888         nlmsg_free(msg);
14889 }
14890 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
14891
14892 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
14893                                      struct net_device *netdev, const u8 *bssid,
14894                                      const u8 *replay_ctr, gfp_t gfp)
14895 {
14896         struct sk_buff *msg;
14897         struct nlattr *rekey_attr;
14898         void *hdr;
14899
14900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14901         if (!msg)
14902                 return;
14903
14904         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
14905         if (!hdr) {
14906                 nlmsg_free(msg);
14907                 return;
14908         }
14909
14910         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14911             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14912             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
14913                 goto nla_put_failure;
14914
14915         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
14916         if (!rekey_attr)
14917                 goto nla_put_failure;
14918
14919         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
14920                     NL80211_REPLAY_CTR_LEN, replay_ctr))
14921                 goto nla_put_failure;
14922
14923         nla_nest_end(msg, rekey_attr);
14924
14925         genlmsg_end(msg, hdr);
14926
14927         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14928                                 NL80211_MCGRP_MLME, gfp);
14929         return;
14930
14931  nla_put_failure:
14932         nlmsg_free(msg);
14933 }
14934
14935 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
14936                                const u8 *replay_ctr, gfp_t gfp)
14937 {
14938         struct wireless_dev *wdev = dev->ieee80211_ptr;
14939         struct wiphy *wiphy = wdev->wiphy;
14940         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14941
14942         trace_cfg80211_gtk_rekey_notify(dev, bssid);
14943         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
14944 }
14945 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
14946
14947 static void
14948 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
14949                                struct net_device *netdev, int index,
14950                                const u8 *bssid, bool preauth, gfp_t gfp)
14951 {
14952         struct sk_buff *msg;
14953         struct nlattr *attr;
14954         void *hdr;
14955
14956         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14957         if (!msg)
14958                 return;
14959
14960         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
14961         if (!hdr) {
14962                 nlmsg_free(msg);
14963                 return;
14964         }
14965
14966         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14967             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
14968                 goto nla_put_failure;
14969
14970         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
14971         if (!attr)
14972                 goto nla_put_failure;
14973
14974         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
14975             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
14976             (preauth &&
14977              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
14978                 goto nla_put_failure;
14979
14980         nla_nest_end(msg, attr);
14981
14982         genlmsg_end(msg, hdr);
14983
14984         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14985                                 NL80211_MCGRP_MLME, gfp);
14986         return;
14987
14988  nla_put_failure:
14989         nlmsg_free(msg);
14990 }
14991
14992 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
14993                                      const u8 *bssid, bool preauth, gfp_t gfp)
14994 {
14995         struct wireless_dev *wdev = dev->ieee80211_ptr;
14996         struct wiphy *wiphy = wdev->wiphy;
14997         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14998
14999         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
15000         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
15001 }
15002 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
15003
15004 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
15005                                      struct net_device *netdev,
15006                                      struct cfg80211_chan_def *chandef,
15007                                      gfp_t gfp,
15008                                      enum nl80211_commands notif,
15009                                      u8 count)
15010 {
15011         struct sk_buff *msg;
15012         void *hdr;
15013
15014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15015         if (!msg)
15016                 return;
15017
15018         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
15019         if (!hdr) {
15020                 nlmsg_free(msg);
15021                 return;
15022         }
15023
15024         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
15025                 goto nla_put_failure;
15026
15027         if (nl80211_send_chandef(msg, chandef))
15028                 goto nla_put_failure;
15029
15030         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
15031             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
15032                         goto nla_put_failure;
15033
15034         genlmsg_end(msg, hdr);
15035
15036         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15037                                 NL80211_MCGRP_MLME, gfp);
15038         return;
15039
15040  nla_put_failure:
15041         nlmsg_free(msg);
15042 }
15043
15044 void cfg80211_ch_switch_notify(struct net_device *dev,
15045                                struct cfg80211_chan_def *chandef)
15046 {
15047         struct wireless_dev *wdev = dev->ieee80211_ptr;
15048         struct wiphy *wiphy = wdev->wiphy;
15049         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15050
15051         ASSERT_WDEV_LOCK(wdev);
15052
15053         trace_cfg80211_ch_switch_notify(dev, chandef);
15054
15055         wdev->chandef = *chandef;
15056         wdev->preset_chandef = *chandef;
15057         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
15058                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
15059 }
15060 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
15061
15062 void cfg80211_ch_switch_started_notify(struct net_device *dev,
15063                                        struct cfg80211_chan_def *chandef,
15064                                        u8 count)
15065 {
15066         struct wireless_dev *wdev = dev->ieee80211_ptr;
15067         struct wiphy *wiphy = wdev->wiphy;
15068         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15069
15070         trace_cfg80211_ch_switch_started_notify(dev, chandef);
15071
15072         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
15073                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
15074 }
15075 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
15076
15077 void
15078 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
15079                      const struct cfg80211_chan_def *chandef,
15080                      enum nl80211_radar_event event,
15081                      struct net_device *netdev, gfp_t gfp)
15082 {
15083         struct sk_buff *msg;
15084         void *hdr;
15085
15086         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15087         if (!msg)
15088                 return;
15089
15090         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
15091         if (!hdr) {
15092                 nlmsg_free(msg);
15093                 return;
15094         }
15095
15096         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
15097                 goto nla_put_failure;
15098
15099         /* NOP and radar events don't need a netdev parameter */
15100         if (netdev) {
15101                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
15102
15103                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
15104                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15105                                       NL80211_ATTR_PAD))
15106                         goto nla_put_failure;
15107         }
15108
15109         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
15110                 goto nla_put_failure;
15111
15112         if (nl80211_send_chandef(msg, chandef))
15113                 goto nla_put_failure;
15114
15115         genlmsg_end(msg, hdr);
15116
15117         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15118                                 NL80211_MCGRP_MLME, gfp);
15119         return;
15120
15121  nla_put_failure:
15122         nlmsg_free(msg);
15123 }
15124
15125 void cfg80211_sta_opmode_change_notify(struct net_device *dev, const u8 *mac,
15126                                        struct sta_opmode_info *sta_opmode,
15127                                        gfp_t gfp)
15128 {
15129         struct sk_buff *msg;
15130         struct wireless_dev *wdev = dev->ieee80211_ptr;
15131         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
15132         void *hdr;
15133
15134         if (WARN_ON(!mac))
15135                 return;
15136
15137         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15138         if (!msg)
15139                 return;
15140
15141         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STA_OPMODE_CHANGED);
15142         if (!hdr) {
15143                 nlmsg_free(msg);
15144                 return;
15145         }
15146
15147         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
15148                 goto nla_put_failure;
15149
15150         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
15151                 goto nla_put_failure;
15152
15153         if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
15154                 goto nla_put_failure;
15155
15156         if ((sta_opmode->changed & STA_OPMODE_SMPS_MODE_CHANGED) &&
15157             nla_put_u8(msg, NL80211_ATTR_SMPS_MODE, sta_opmode->smps_mode))
15158                 goto nla_put_failure;
15159
15160         if ((sta_opmode->changed & STA_OPMODE_MAX_BW_CHANGED) &&
15161             nla_put_u8(msg, NL80211_ATTR_CHANNEL_WIDTH, sta_opmode->bw))
15162                 goto nla_put_failure;
15163
15164         if ((sta_opmode->changed & STA_OPMODE_N_SS_CHANGED) &&
15165             nla_put_u8(msg, NL80211_ATTR_NSS, sta_opmode->rx_nss))
15166                 goto nla_put_failure;
15167
15168         genlmsg_end(msg, hdr);
15169
15170         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15171                                 NL80211_MCGRP_MLME, gfp);
15172
15173         return;
15174
15175 nla_put_failure:
15176         nlmsg_free(msg);
15177 }
15178 EXPORT_SYMBOL(cfg80211_sta_opmode_change_notify);
15179
15180 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
15181                            u64 cookie, bool acked, s32 ack_signal,
15182                            bool is_valid_ack_signal, gfp_t gfp)
15183 {
15184         struct wireless_dev *wdev = dev->ieee80211_ptr;
15185         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
15186         struct sk_buff *msg;
15187         void *hdr;
15188
15189         trace_cfg80211_probe_status(dev, addr, cookie, acked);
15190
15191         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15192
15193         if (!msg)
15194                 return;
15195
15196         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
15197         if (!hdr) {
15198                 nlmsg_free(msg);
15199                 return;
15200         }
15201
15202         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15203             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
15204             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
15205             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
15206                               NL80211_ATTR_PAD) ||
15207             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)) ||
15208             (is_valid_ack_signal && nla_put_s32(msg, NL80211_ATTR_ACK_SIGNAL,
15209                                                 ack_signal)))
15210                 goto nla_put_failure;
15211
15212         genlmsg_end(msg, hdr);
15213
15214         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15215                                 NL80211_MCGRP_MLME, gfp);
15216         return;
15217
15218  nla_put_failure:
15219         nlmsg_free(msg);
15220 }
15221 EXPORT_SYMBOL(cfg80211_probe_status);
15222
15223 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
15224                                  const u8 *frame, size_t len,
15225                                  int freq, int sig_dbm)
15226 {
15227         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15228         struct sk_buff *msg;
15229         void *hdr;
15230         struct cfg80211_beacon_registration *reg;
15231
15232         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
15233
15234         spin_lock_bh(&rdev->beacon_registrations_lock);
15235         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
15236                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
15237                 if (!msg) {
15238                         spin_unlock_bh(&rdev->beacon_registrations_lock);
15239                         return;
15240                 }
15241
15242                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
15243                 if (!hdr)
15244                         goto nla_put_failure;
15245
15246                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15247                     (freq &&
15248                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
15249                     (sig_dbm &&
15250                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
15251                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
15252                         goto nla_put_failure;
15253
15254                 genlmsg_end(msg, hdr);
15255
15256                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
15257         }
15258         spin_unlock_bh(&rdev->beacon_registrations_lock);
15259         return;
15260
15261  nla_put_failure:
15262         spin_unlock_bh(&rdev->beacon_registrations_lock);
15263         nlmsg_free(msg);
15264 }
15265 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
15266
15267 #ifdef CONFIG_PM
15268 static int cfg80211_net_detect_results(struct sk_buff *msg,
15269                                        struct cfg80211_wowlan_wakeup *wakeup)
15270 {
15271         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
15272         struct nlattr *nl_results, *nl_match, *nl_freqs;
15273         int i, j;
15274
15275         nl_results = nla_nest_start(
15276                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
15277         if (!nl_results)
15278                 return -EMSGSIZE;
15279
15280         for (i = 0; i < nd->n_matches; i++) {
15281                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
15282
15283                 nl_match = nla_nest_start(msg, i);
15284                 if (!nl_match)
15285                         break;
15286
15287                 /* The SSID attribute is optional in nl80211, but for
15288                  * simplicity reasons it's always present in the
15289                  * cfg80211 structure.  If a driver can't pass the
15290                  * SSID, that needs to be changed.  A zero length SSID
15291                  * is still a valid SSID (wildcard), so it cannot be
15292                  * used for this purpose.
15293                  */
15294                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
15295                             match->ssid.ssid)) {
15296                         nla_nest_cancel(msg, nl_match);
15297                         goto out;
15298                 }
15299
15300                 if (match->n_channels) {
15301                         nl_freqs = nla_nest_start(
15302                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
15303                         if (!nl_freqs) {
15304                                 nla_nest_cancel(msg, nl_match);
15305                                 goto out;
15306                         }
15307
15308                         for (j = 0; j < match->n_channels; j++) {
15309                                 if (nla_put_u32(msg, j, match->channels[j])) {
15310                                         nla_nest_cancel(msg, nl_freqs);
15311                                         nla_nest_cancel(msg, nl_match);
15312                                         goto out;
15313                                 }
15314                         }
15315
15316                         nla_nest_end(msg, nl_freqs);
15317                 }
15318
15319                 nla_nest_end(msg, nl_match);
15320         }
15321
15322 out:
15323         nla_nest_end(msg, nl_results);
15324         return 0;
15325 }
15326
15327 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
15328                                    struct cfg80211_wowlan_wakeup *wakeup,
15329                                    gfp_t gfp)
15330 {
15331         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
15332         struct sk_buff *msg;
15333         void *hdr;
15334         int size = 200;
15335
15336         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
15337
15338         if (wakeup)
15339                 size += wakeup->packet_present_len;
15340
15341         msg = nlmsg_new(size, gfp);
15342         if (!msg)
15343                 return;
15344
15345         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
15346         if (!hdr)
15347                 goto free_msg;
15348
15349         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15350             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15351                               NL80211_ATTR_PAD))
15352                 goto free_msg;
15353
15354         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
15355                                         wdev->netdev->ifindex))
15356                 goto free_msg;
15357
15358         if (wakeup) {
15359                 struct nlattr *reasons;
15360
15361                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
15362                 if (!reasons)
15363                         goto free_msg;
15364
15365                 if (wakeup->disconnect &&
15366                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
15367                         goto free_msg;
15368                 if (wakeup->magic_pkt &&
15369                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
15370                         goto free_msg;
15371                 if (wakeup->gtk_rekey_failure &&
15372                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
15373                         goto free_msg;
15374                 if (wakeup->eap_identity_req &&
15375                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
15376                         goto free_msg;
15377                 if (wakeup->four_way_handshake &&
15378                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
15379                         goto free_msg;
15380                 if (wakeup->rfkill_release &&
15381                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
15382                         goto free_msg;
15383
15384                 if (wakeup->pattern_idx >= 0 &&
15385                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
15386                                 wakeup->pattern_idx))
15387                         goto free_msg;
15388
15389                 if (wakeup->tcp_match &&
15390                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
15391                         goto free_msg;
15392
15393                 if (wakeup->tcp_connlost &&
15394                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
15395                         goto free_msg;
15396
15397                 if (wakeup->tcp_nomoretokens &&
15398                     nla_put_flag(msg,
15399                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
15400                         goto free_msg;
15401
15402                 if (wakeup->packet) {
15403                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
15404                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
15405
15406                         if (!wakeup->packet_80211) {
15407                                 pkt_attr =
15408                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
15409                                 len_attr =
15410                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
15411                         }
15412
15413                         if (wakeup->packet_len &&
15414                             nla_put_u32(msg, len_attr, wakeup->packet_len))
15415                                 goto free_msg;
15416
15417                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
15418                                     wakeup->packet))
15419                                 goto free_msg;
15420                 }
15421
15422                 if (wakeup->net_detect &&
15423                     cfg80211_net_detect_results(msg, wakeup))
15424                                 goto free_msg;
15425
15426                 nla_nest_end(msg, reasons);
15427         }
15428
15429         genlmsg_end(msg, hdr);
15430
15431         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15432                                 NL80211_MCGRP_MLME, gfp);
15433         return;
15434
15435  free_msg:
15436         nlmsg_free(msg);
15437 }
15438 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
15439 #endif
15440
15441 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
15442                                 enum nl80211_tdls_operation oper,
15443                                 u16 reason_code, gfp_t gfp)
15444 {
15445         struct wireless_dev *wdev = dev->ieee80211_ptr;
15446         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
15447         struct sk_buff *msg;
15448         void *hdr;
15449
15450         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
15451                                          reason_code);
15452
15453         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15454         if (!msg)
15455                 return;
15456
15457         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
15458         if (!hdr) {
15459                 nlmsg_free(msg);
15460                 return;
15461         }
15462
15463         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15464             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
15465             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
15466             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
15467             (reason_code > 0 &&
15468              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
15469                 goto nla_put_failure;
15470
15471         genlmsg_end(msg, hdr);
15472
15473         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15474                                 NL80211_MCGRP_MLME, gfp);
15475         return;
15476
15477  nla_put_failure:
15478         nlmsg_free(msg);
15479 }
15480 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
15481
15482 static int nl80211_netlink_notify(struct notifier_block * nb,
15483                                   unsigned long state,
15484                                   void *_notify)
15485 {
15486         struct netlink_notify *notify = _notify;
15487         struct cfg80211_registered_device *rdev;
15488         struct wireless_dev *wdev;
15489         struct cfg80211_beacon_registration *reg, *tmp;
15490
15491         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
15492                 return NOTIFY_DONE;
15493
15494         rcu_read_lock();
15495
15496         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
15497                 struct cfg80211_sched_scan_request *sched_scan_req;
15498
15499                 list_for_each_entry_rcu(sched_scan_req,
15500                                         &rdev->sched_scan_req_list,
15501                                         list) {
15502                         if (sched_scan_req->owner_nlportid == notify->portid) {
15503                                 sched_scan_req->nl_owner_dead = true;
15504                                 schedule_work(&rdev->sched_scan_stop_wk);
15505                         }
15506                 }
15507
15508                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
15509                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
15510
15511                         if (wdev->owner_nlportid == notify->portid) {
15512                                 wdev->nl_owner_dead = true;
15513                                 schedule_work(&rdev->destroy_work);
15514                         } else if (wdev->conn_owner_nlportid == notify->portid) {
15515                                 schedule_work(&wdev->disconnect_wk);
15516                         }
15517                 }
15518
15519                 spin_lock_bh(&rdev->beacon_registrations_lock);
15520                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
15521                                          list) {
15522                         if (reg->nlportid == notify->portid) {
15523                                 list_del(&reg->list);
15524                                 kfree(reg);
15525                                 break;
15526                         }
15527                 }
15528                 spin_unlock_bh(&rdev->beacon_registrations_lock);
15529         }
15530
15531         rcu_read_unlock();
15532
15533         /*
15534          * It is possible that the user space process that is controlling the
15535          * indoor setting disappeared, so notify the regulatory core.
15536          */
15537         regulatory_netlink_notify(notify->portid);
15538         return NOTIFY_OK;
15539 }
15540
15541 static struct notifier_block nl80211_netlink_notifier = {
15542         .notifier_call = nl80211_netlink_notify,
15543 };
15544
15545 void cfg80211_ft_event(struct net_device *netdev,
15546                        struct cfg80211_ft_event_params *ft_event)
15547 {
15548         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
15549         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15550         struct sk_buff *msg;
15551         void *hdr;
15552
15553         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
15554
15555         if (!ft_event->target_ap)
15556                 return;
15557
15558         msg = nlmsg_new(100 + ft_event->ies_len + ft_event->ric_ies_len,
15559                         GFP_KERNEL);
15560         if (!msg)
15561                 return;
15562
15563         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
15564         if (!hdr)
15565                 goto out;
15566
15567         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15568             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
15569             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
15570                 goto out;
15571
15572         if (ft_event->ies &&
15573             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
15574                 goto out;
15575         if (ft_event->ric_ies &&
15576             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
15577                     ft_event->ric_ies))
15578                 goto out;
15579
15580         genlmsg_end(msg, hdr);
15581
15582         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15583                                 NL80211_MCGRP_MLME, GFP_KERNEL);
15584         return;
15585  out:
15586         nlmsg_free(msg);
15587 }
15588 EXPORT_SYMBOL(cfg80211_ft_event);
15589
15590 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
15591 {
15592         struct cfg80211_registered_device *rdev;
15593         struct sk_buff *msg;
15594         void *hdr;
15595         u32 nlportid;
15596
15597         rdev = wiphy_to_rdev(wdev->wiphy);
15598         if (!rdev->crit_proto_nlportid)
15599                 return;
15600
15601         nlportid = rdev->crit_proto_nlportid;
15602         rdev->crit_proto_nlportid = 0;
15603
15604         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15605         if (!msg)
15606                 return;
15607
15608         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
15609         if (!hdr)
15610                 goto nla_put_failure;
15611
15612         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15613             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15614                               NL80211_ATTR_PAD))
15615                 goto nla_put_failure;
15616
15617         genlmsg_end(msg, hdr);
15618
15619         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
15620         return;
15621
15622  nla_put_failure:
15623         nlmsg_free(msg);
15624 }
15625 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
15626
15627 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
15628 {
15629         struct wiphy *wiphy = wdev->wiphy;
15630         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15631         struct sk_buff *msg;
15632         void *hdr;
15633
15634         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
15635         if (!msg)
15636                 return;
15637
15638         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
15639         if (!hdr)
15640                 goto out;
15641
15642         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15643             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
15644             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15645                               NL80211_ATTR_PAD))
15646                 goto out;
15647
15648         genlmsg_end(msg, hdr);
15649
15650         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
15651                                 NL80211_MCGRP_MLME, GFP_KERNEL);
15652         return;
15653  out:
15654         nlmsg_free(msg);
15655 }
15656
15657 int cfg80211_external_auth_request(struct net_device *dev,
15658                                    struct cfg80211_external_auth_params *params,
15659                                    gfp_t gfp)
15660 {
15661         struct wireless_dev *wdev = dev->ieee80211_ptr;
15662         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
15663         struct sk_buff *msg;
15664         void *hdr;
15665
15666         if (!wdev->conn_owner_nlportid)
15667                 return -EINVAL;
15668
15669         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15670         if (!msg)
15671                 return -ENOMEM;
15672
15673         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_EXTERNAL_AUTH);
15674         if (!hdr)
15675                 goto nla_put_failure;
15676
15677         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15678             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
15679             nla_put_u32(msg, NL80211_ATTR_AKM_SUITES, params->key_mgmt_suite) ||
15680             nla_put_u32(msg, NL80211_ATTR_EXTERNAL_AUTH_ACTION,
15681                         params->action) ||
15682             nla_put(msg, NL80211_ATTR_BSSID, ETH_ALEN, params->bssid) ||
15683             nla_put(msg, NL80211_ATTR_SSID, params->ssid.ssid_len,
15684                     params->ssid.ssid))
15685                 goto nla_put_failure;
15686
15687         genlmsg_end(msg, hdr);
15688         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
15689                         wdev->conn_owner_nlportid);
15690         return 0;
15691
15692  nla_put_failure:
15693         nlmsg_free(msg);
15694         return -ENOBUFS;
15695 }
15696 EXPORT_SYMBOL(cfg80211_external_auth_request);
15697
15698 /* initialisation/exit functions */
15699
15700 int __init nl80211_init(void)
15701 {
15702         int err;
15703
15704         err = genl_register_family(&nl80211_fam);
15705         if (err)
15706                 return err;
15707
15708         err = netlink_register_notifier(&nl80211_netlink_notifier);
15709         if (err)
15710                 goto err_out;
15711
15712         return 0;
15713  err_out:
15714         genl_unregister_family(&nl80211_fam);
15715         return err;
15716 }
15717
15718 void nl80211_exit(void)
15719 {
15720         netlink_unregister_notifier(&nl80211_netlink_notifier);
15721         genl_unregister_family(&nl80211_fam);
15722 }