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/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 /* the netlink family */
  36 static struct genl_family nl80211_fam;
  37
  38 /* multicast groups */
  39 enum nl80211_multicast_groups {
  40         NL80211_MCGRP_CONFIG,
  41         NL80211_MCGRP_SCAN,
  42         NL80211_MCGRP_REGULATORY,
  43         NL80211_MCGRP_MLME,
  44         NL80211_MCGRP_VENDOR,
  45         NL80211_MCGRP_NAN,
  46         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  47 };
  48
  49 static const struct genl_multicast_group nl80211_mcgrps[] = {
  50         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  51         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  52         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  53         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  54         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  55         [NL80211_MCGRP_NAN] = { .name = NL80211_MULTICAST_GROUP_NAN },
  56 #ifdef CONFIG_NL80211_TESTMODE
  57         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  58 #endif
  59 };
  60
  61 /* returns ERR_PTR values */
  62 static struct wireless_dev *
  63 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  64 {
  65         struct cfg80211_registered_device *rdev;
  66         struct wireless_dev *result = NULL;
  67         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  68         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  69         u64 wdev_id;
  70         int wiphy_idx = -1;
  71         int ifidx = -1;
  72
  73         ASSERT_RTNL();
  74
  75         if (!have_ifidx && !have_wdev_id)
  76                 return ERR_PTR(-EINVAL);
  77
  78         if (have_ifidx)
  79                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  80         if (have_wdev_id) {
  81                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  82                 wiphy_idx = wdev_id >> 32;
  83         }
  84
  85         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  86                 struct wireless_dev *wdev;
  87
  88                 if (wiphy_net(&rdev->wiphy) != netns)
  89                         continue;
  90
  91                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  92                         continue;
  93
  94                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
  95                         if (have_ifidx && wdev->netdev &&
  96                             wdev->netdev->ifindex == ifidx) {
  97                                 result = wdev;
  98                                 break;
  99                         }
 100                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 101                                 result = wdev;
 102                                 break;
 103                         }
 104                 }
 105
 106                 if (result)
 107                         break;
 108         }
 109
 110         if (result)
 111                 return result;
 112         return ERR_PTR(-ENODEV);
 113 }
 114
 115 static struct cfg80211_registered_device *
 116 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 117 {
 118         struct cfg80211_registered_device *rdev = NULL, *tmp;
 119         struct net_device *netdev;
 120
 121         ASSERT_RTNL();
 122
 123         if (!attrs[NL80211_ATTR_WIPHY] &&
 124             !attrs[NL80211_ATTR_IFINDEX] &&
 125             !attrs[NL80211_ATTR_WDEV])
 126                 return ERR_PTR(-EINVAL);
 127
 128         if (attrs[NL80211_ATTR_WIPHY])
 129                 rdev = cfg80211_rdev_by_wiphy_idx(
 130                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 131
 132         if (attrs[NL80211_ATTR_WDEV]) {
 133                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 134                 struct wireless_dev *wdev;
 135                 bool found = false;
 136
 137                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 138                 if (tmp) {
 139                         /* make sure wdev exists */
 140                         list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
 141                                 if (wdev->identifier != (u32)wdev_id)
 142                                         continue;
 143                                 found = true;
 144                                 break;
 145                         }
 146
 147                         if (!found)
 148                                 tmp = NULL;
 149
 150                         if (rdev && tmp != rdev)
 151                                 return ERR_PTR(-EINVAL);
 152                         rdev = tmp;
 153                 }
 154         }
 155
 156         if (attrs[NL80211_ATTR_IFINDEX]) {
 157                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 158
 159                 netdev = __dev_get_by_index(netns, ifindex);
 160                 if (netdev) {
 161                         if (netdev->ieee80211_ptr)
 162                                 tmp = wiphy_to_rdev(
 163                                         netdev->ieee80211_ptr->wiphy);
 164                         else
 165                                 tmp = NULL;
 166
 167                         /* not wireless device -- return error */
 168                         if (!tmp)
 169                                 return ERR_PTR(-EINVAL);
 170
 171                         /* mismatch -- return error */
 172                         if (rdev && tmp != rdev)
 173                                 return ERR_PTR(-EINVAL);
 174
 175                         rdev = tmp;
 176                 }
 177         }
 178
 179         if (!rdev)
 180                 return ERR_PTR(-ENODEV);
 181
 182         if (netns != wiphy_net(&rdev->wiphy))
 183                 return ERR_PTR(-ENODEV);
 184
 185         return rdev;
 186 }
 187
 188 /*
 189  * This function returns a pointer to the driver
 190  * that the genl_info item that is passed refers to.
 191  *
 192  * The result of this can be a PTR_ERR and hence must
 193  * be checked with IS_ERR() for errors.
 194  */
 195 static struct cfg80211_registered_device *
 196 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 197 {
 198         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 199 }
 200
 201 /* policy for the attributes */
 202 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 203         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 204         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 205                                       .len = 20-1 },
 206         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 207
 208         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 209         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 210         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 211         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 212         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 213
 214         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 215         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 216         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 217         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 218         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 219         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 220
 221         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 222         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 223         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 224
 225         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 226         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 227
 228         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 229         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 230                                     .len = WLAN_MAX_KEY_LEN },
 231         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 232         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 233         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 234         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 235         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 236
 237         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 238         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 239         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 240                                        .len = IEEE80211_MAX_DATA_LEN },
 241         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 242                                        .len = IEEE80211_MAX_DATA_LEN },
 243         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 244         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 245         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 246         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 247                                                .len = NL80211_MAX_SUPP_RATES },
 248         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 249         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 250         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 251         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 252                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 253         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 256         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 257
 258         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 259         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 261         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 262                                            .len = NL80211_MAX_SUPP_RATES },
 263         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 264
 265         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 266         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 267
 268         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 269
 270         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 271         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 272                               .len = IEEE80211_MAX_DATA_LEN },
 273         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 274         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 277                                 .len = IEEE80211_MAX_SSID_LEN },
 278         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 279         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 280         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 281         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 282         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 283         [NL80211_ATTR_STA_FLAGS2] = {
 284                 .len = sizeof(struct nl80211_sta_flag_update),
 285         },
 286         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 287         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 288         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 289         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 290         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 291         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 292         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 293         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 294         [NL80211_ATTR_PMKID] = { .len = WLAN_PMKID_LEN },
 295         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 296         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 297         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 298         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 299                                  .len = IEEE80211_MAX_DATA_LEN },
 300         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 301         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 302         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 303         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 304         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 305         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 306         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 307         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 308         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 309         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 310         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 311         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 312         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 313         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 314         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 315         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 316         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 317         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 319         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 320                                          .len = IEEE80211_MAX_DATA_LEN },
 321         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 322                                          .len = IEEE80211_MAX_DATA_LEN },
 323         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 325         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 327         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 328         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 329         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 330         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 334                                       .len = IEEE80211_MAX_DATA_LEN },
 335         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 336         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 337         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 338                 .len = NL80211_HT_CAPABILITY_LEN
 339         },
 340         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 341         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 342         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 343         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 344         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 345         [NL80211_ATTR_AUTH_DATA] = { .type = NLA_BINARY, },
 346         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 347         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 348         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 349         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 350         [NL80211_ATTR_LOCAL_MESH_POWER_MODE] = {. type = NLA_U32 },
 351         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 352         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 353         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 354         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 355         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 356         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 357         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 358                 .len = NL80211_VHT_CAPABILITY_LEN,
 359         },
 360         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 361         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 362                                   .len = IEEE80211_MAX_DATA_LEN },
 363         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 364         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 365         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 366         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 367         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 368         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 369         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 370         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 371         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 372         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 373         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 374         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 375         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 376         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 377                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 378         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 379         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 380         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 381         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 382         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 383         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 384         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 385         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 386         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 387         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 388         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 389         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 390         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 391         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 392         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 393         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 395         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 396         [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
 397                 .len = VHT_MUMIMO_GROUPS_DATA_LEN
 398         },
 399         [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
 400         [NL80211_ATTR_NAN_MASTER_PREF] = { .type = NLA_U8 },
 401         [NL80211_ATTR_BANDS] = { .type = NLA_U32 },
 402         [NL80211_ATTR_NAN_FUNC] = { .type = NLA_NESTED },
 403         [NL80211_ATTR_FILS_KEK] = { .type = NLA_BINARY,
 404                                     .len = FILS_MAX_KEK_LEN },
 405         [NL80211_ATTR_FILS_NONCES] = { .len = 2 * FILS_NONCE_LEN },
 406         [NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED] = { .type = NLA_FLAG, },
 407         [NL80211_ATTR_BSSID] = { .len = ETH_ALEN },
 408         [NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] = { .type = NLA_S8 },
 409         [NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST] = {
 410                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 411         },
 412         [NL80211_ATTR_TIMEOUT_REASON] = { .type = NLA_U32 },
 413         [NL80211_ATTR_FILS_ERP_USERNAME] = { .type = NLA_BINARY,
 414                                              .len = FILS_ERP_MAX_USERNAME_LEN },
 415         [NL80211_ATTR_FILS_ERP_REALM] = { .type = NLA_BINARY,
 416                                           .len = FILS_ERP_MAX_REALM_LEN },
 417         [NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] = { .type = NLA_U16 },
 418         [NL80211_ATTR_FILS_ERP_RRK] = { .type = NLA_BINARY,
 419                                         .len = FILS_ERP_MAX_RRK_LEN },
 420         [NL80211_ATTR_FILS_CACHE_ID] = { .len = 2 },
 421         [NL80211_ATTR_PMK] = { .type = NLA_BINARY, .len = PMK_MAX_LEN },
 422         [NL80211_ATTR_SCHED_SCAN_MULTI] = { .type = NLA_FLAG },
 423 };
 424
 425 /* policy for the key attributes */
 426 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 427         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 428         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 429         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 430         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 431         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 432         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 433         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 434         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 435 };
 436
 437 /* policy for the key default flags */
 438 static const struct nla_policy
 439 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 440         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 441         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 442 };
 443
 444 #ifdef CONFIG_PM
 445 /* policy for WoWLAN attributes */
 446 static const struct nla_policy
 447 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 448         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 449         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 450         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 451         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 452         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 453         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 454         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 455         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 456         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 457         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 458 };
 459
 460 static const struct nla_policy
 461 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 462         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 463         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 464         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 465         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 466         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 467         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 468         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 469                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 470         },
 471         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 472                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 473         },
 474         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 475         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 476         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 477 };
 478 #endif /* CONFIG_PM */
 479
 480 /* policy for coalesce rule attributes */
 481 static const struct nla_policy
 482 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 483         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 484         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 485         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 486 };
 487
 488 /* policy for GTK rekey offload attributes */
 489 static const struct nla_policy
 490 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 491         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 492         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 493         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 494 };
 495
 496 static const struct nla_policy
 497 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 498         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 499                                                  .len = IEEE80211_MAX_SSID_LEN },
 500         [NL80211_SCHED_SCAN_MATCH_ATTR_BSSID] = { .len = ETH_ALEN },
 501         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 502 };
 503
 504 static const struct nla_policy
 505 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 506         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 507         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 508 };
 509
 510 static const struct nla_policy
 511 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 512         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 513         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 514         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 515                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 516         },
 517 };
 518
 519 /* policy for NAN function attributes */
 520 static const struct nla_policy
 521 nl80211_nan_func_policy[NL80211_NAN_FUNC_ATTR_MAX + 1] = {
 522         [NL80211_NAN_FUNC_TYPE] = { .type = NLA_U8 },
 523         [NL80211_NAN_FUNC_SERVICE_ID] = {
 524                                     .len = NL80211_NAN_FUNC_SERVICE_ID_LEN },
 525         [NL80211_NAN_FUNC_PUBLISH_TYPE] = { .type = NLA_U8 },
 526         [NL80211_NAN_FUNC_PUBLISH_BCAST] = { .type = NLA_FLAG },
 527         [NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE] = { .type = NLA_FLAG },
 528         [NL80211_NAN_FUNC_FOLLOW_UP_ID] = { .type = NLA_U8 },
 529         [NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] = { .type = NLA_U8 },
 530         [NL80211_NAN_FUNC_FOLLOW_UP_DEST] = { .len = ETH_ALEN },
 531         [NL80211_NAN_FUNC_CLOSE_RANGE] = { .type = NLA_FLAG },
 532         [NL80211_NAN_FUNC_TTL] = { .type = NLA_U32 },
 533         [NL80211_NAN_FUNC_SERVICE_INFO] = { .type = NLA_BINARY,
 534                         .len = NL80211_NAN_FUNC_SERVICE_SPEC_INFO_MAX_LEN },
 535         [NL80211_NAN_FUNC_SRF] = { .type = NLA_NESTED },
 536         [NL80211_NAN_FUNC_RX_MATCH_FILTER] = { .type = NLA_NESTED },
 537         [NL80211_NAN_FUNC_TX_MATCH_FILTER] = { .type = NLA_NESTED },
 538         [NL80211_NAN_FUNC_INSTANCE_ID] = { .type = NLA_U8 },
 539         [NL80211_NAN_FUNC_TERM_REASON] = { .type = NLA_U8 },
 540 };
 541
 542 /* policy for Service Response Filter attributes */
 543 static const struct nla_policy
 544 nl80211_nan_srf_policy[NL80211_NAN_SRF_ATTR_MAX + 1] = {
 545         [NL80211_NAN_SRF_INCLUDE] = { .type = NLA_FLAG },
 546         [NL80211_NAN_SRF_BF] = { .type = NLA_BINARY,
 547                                  .len =  NL80211_NAN_FUNC_SRF_MAX_LEN },
 548         [NL80211_NAN_SRF_BF_IDX] = { .type = NLA_U8 },
 549         [NL80211_NAN_SRF_MAC_ADDRS] = { .type = NLA_NESTED },
 550 };
 551
 552 /* policy for packet pattern attributes */
 553 static const struct nla_policy
 554 nl80211_packet_pattern_policy[MAX_NL80211_PKTPAT + 1] = {
 555         [NL80211_PKTPAT_MASK] = { .type = NLA_BINARY, },
 556         [NL80211_PKTPAT_PATTERN] = { .type = NLA_BINARY, },
 557         [NL80211_PKTPAT_OFFSET] = { .type = NLA_U32 },
 558 };
 559
 560 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 561                                      struct netlink_callback *cb,
 562                                      struct cfg80211_registered_device **rdev,
 563                                      struct wireless_dev **wdev)
 564 {
 565         int err;
 566
 567         if (!cb->args[0]) {
 568                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 569                                   genl_family_attrbuf(&nl80211_fam),
 570                                   nl80211_fam.maxattr, nl80211_policy, NULL);
 571                 if (err)
 572                         return err;
 573
 574                 *wdev = __cfg80211_wdev_from_attrs(
 575                                         sock_net(skb->sk),
 576                                         genl_family_attrbuf(&nl80211_fam));
 577                 if (IS_ERR(*wdev))
 578                         return PTR_ERR(*wdev);
 579                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 580                 /* 0 is the first index - add 1 to parse only once */
 581                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 582                 cb->args[1] = (*wdev)->identifier;
 583         } else {
 584                 /* subtract the 1 again here */
 585                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 586                 struct wireless_dev *tmp;
 587
 588                 if (!wiphy)
 589                         return -ENODEV;
 590                 *rdev = wiphy_to_rdev(wiphy);
 591                 *wdev = NULL;
 592
 593                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 594                         if (tmp->identifier == cb->args[1]) {
 595                                 *wdev = tmp;
 596                                 break;
 597                         }
 598                 }
 599
 600                 if (!*wdev)
 601                         return -ENODEV;
 602         }
 603
 604         return 0;
 605 }
 606
 607 /* IE validation */
 608 static bool is_valid_ie_attr(const struct nlattr *attr)
 609 {
 610         const u8 *pos;
 611         int len;
 612
 613         if (!attr)
 614                 return true;
 615
 616         pos = nla_data(attr);
 617         len = nla_len(attr);
 618
 619         while (len) {
 620                 u8 elemlen;
 621
 622                 if (len < 2)
 623                         return false;
 624                 len -= 2;
 625
 626                 elemlen = pos[1];
 627                 if (elemlen > len)
 628                         return false;
 629
 630                 len -= elemlen;
 631                 pos += 2 + elemlen;
 632         }
 633
 634         return true;
 635 }
 636
 637 /* message building helper */
 638 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 639                                    int flags, u8 cmd)
 640 {
 641         /* since there is no private header just add the generic one */
 642         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 643 }
 644
 645 static int nl80211_msg_put_channel(struct sk_buff *msg,
 646                                    struct ieee80211_channel *chan,
 647                                    bool large)
 648 {
 649         /* Some channels must be completely excluded from the
 650          * list to protect old user-space tools from breaking
 651          */
 652         if (!large && chan->flags &
 653             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 654                 return 0;
 655
 656         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 657                         chan->center_freq))
 658                 goto nla_put_failure;
 659
 660         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 661             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 662                 goto nla_put_failure;
 663         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 664                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 665                         goto nla_put_failure;
 666                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 667                         goto nla_put_failure;
 668         }
 669         if (chan->flags & IEEE80211_CHAN_RADAR) {
 670                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 671                         goto nla_put_failure;
 672                 if (large) {
 673                         u32 time;
 674
 675                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 676
 677                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 678                                         chan->dfs_state))
 679                                 goto nla_put_failure;
 680                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 681                                         time))
 682                                 goto nla_put_failure;
 683                         if (nla_put_u32(msg,
 684                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 685                                         chan->dfs_cac_ms))
 686                                 goto nla_put_failure;
 687                 }
 688         }
 689
 690         if (large) {
 691                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 692                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 693                         goto nla_put_failure;
 694                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 695                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 696                         goto nla_put_failure;
 697                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 698                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 699                         goto nla_put_failure;
 700                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 701                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 702                         goto nla_put_failure;
 703                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 704                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 705                         goto nla_put_failure;
 706                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 707                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 708                         goto nla_put_failure;
 709                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 710                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 711                         goto nla_put_failure;
 712                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 713                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 714                         goto nla_put_failure;
 715         }
 716
 717         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 718                         DBM_TO_MBM(chan->max_power)))
 719                 goto nla_put_failure;
 720
 721         return 0;
 722
 723  nla_put_failure:
 724         return -ENOBUFS;
 725 }
 726
 727 /* netlink command implementations */
 728
 729 struct key_parse {
 730         struct key_params p;
 731         int idx;
 732         int type;
 733         bool def, defmgmt;
 734         bool def_uni, def_multi;
 735 };
 736
 737 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 738 {
 739         struct nlattr *tb[NL80211_KEY_MAX + 1];
 740         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 741                                    nl80211_key_policy, NULL);
 742         if (err)
 743                 return err;
 744
 745         k->def = !!tb[NL80211_KEY_DEFAULT];
 746         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 747
 748         if (k->def) {
 749                 k->def_uni = true;
 750                 k->def_multi = true;
 751         }
 752         if (k->defmgmt)
 753                 k->def_multi = true;
 754
 755         if (tb[NL80211_KEY_IDX])
 756                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 757
 758         if (tb[NL80211_KEY_DATA]) {
 759                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 760                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 761         }
 762
 763         if (tb[NL80211_KEY_SEQ]) {
 764                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 765                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 766         }
 767
 768         if (tb[NL80211_KEY_CIPHER])
 769                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 770
 771         if (tb[NL80211_KEY_TYPE]) {
 772                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 773                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 774                         return -EINVAL;
 775         }
 776
 777         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 778                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 779
 780                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 781                                        tb[NL80211_KEY_DEFAULT_TYPES],
 782                                        nl80211_key_default_policy, NULL);
 783                 if (err)
 784                         return err;
 785
 786                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 787                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 788         }
 789
 790         return 0;
 791 }
 792
 793 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 794 {
 795         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 796                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 797                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 798         }
 799
 800         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 801                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 802                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 803         }
 804
 805         if (info->attrs[NL80211_ATTR_KEY_IDX])
 806                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 807
 808         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 809                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 810
 811         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 812         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 813
 814         if (k->def) {
 815                 k->def_uni = true;
 816                 k->def_multi = true;
 817         }
 818         if (k->defmgmt)
 819                 k->def_multi = true;
 820
 821         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 822                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 823                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 824                         return -EINVAL;
 825         }
 826
 827         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 828                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 829                 int err = nla_parse_nested(kdt,
 830                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 831                                            info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 832                                            nl80211_key_default_policy,
 833                                            info->extack);
 834                 if (err)
 835                         return err;
 836
 837                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 838                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 839         }
 840
 841         return 0;
 842 }
 843
 844 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 845 {
 846         int err;
 847
 848         memset(k, 0, sizeof(*k));
 849         k->idx = -1;
 850         k->type = -1;
 851
 852         if (info->attrs[NL80211_ATTR_KEY])
 853                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 854         else
 855                 err = nl80211_parse_key_old(info, k);
 856
 857         if (err)
 858                 return err;
 859
 860         if (k->def && k->defmgmt)
 861                 return -EINVAL;
 862
 863         if (k->defmgmt) {
 864                 if (k->def_uni || !k->def_multi)
 865                         return -EINVAL;
 866         }
 867
 868         if (k->idx != -1) {
 869                 if (k->defmgmt) {
 870                         if (k->idx < 4 || k->idx > 5)
 871                                 return -EINVAL;
 872                 } else if (k->def) {
 873                         if (k->idx < 0 || k->idx > 3)
 874                                 return -EINVAL;
 875                 } else {
 876                         if (k->idx < 0 || k->idx > 5)
 877                                 return -EINVAL;
 878                 }
 879         }
 880
 881         return 0;
 882 }
 883
 884 static struct cfg80211_cached_keys *
 885 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 886                        struct nlattr *keys, bool *no_ht)
 887 {
 888         struct key_parse parse;
 889         struct nlattr *key;
 890         struct cfg80211_cached_keys *result;
 891         int rem, err, def = 0;
 892         bool have_key = false;
 893
 894         nla_for_each_nested(key, keys, rem) {
 895                 have_key = true;
 896                 break;
 897         }
 898
 899         if (!have_key)
 900                 return NULL;
 901
 902         result = kzalloc(sizeof(*result), GFP_KERNEL);
 903         if (!result)
 904                 return ERR_PTR(-ENOMEM);
 905
 906         result->def = -1;
 907
 908         nla_for_each_nested(key, keys, rem) {
 909                 memset(&parse, 0, sizeof(parse));
 910                 parse.idx = -1;
 911
 912                 err = nl80211_parse_key_new(key, &parse);
 913                 if (err)
 914                         goto error;
 915                 err = -EINVAL;
 916                 if (!parse.p.key)
 917                         goto error;
 918                 if (parse.idx < 0 || parse.idx > 3)
 919                         goto error;
 920                 if (parse.def) {
 921                         if (def)
 922                                 goto error;
 923                         def = 1;
 924                         result->def = parse.idx;
 925                         if (!parse.def_uni || !parse.def_multi)
 926                                 goto error;
 927                 } else if (parse.defmgmt)
 928                         goto error;
 929                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 930                                                      parse.idx, false, NULL);
 931                 if (err)
 932                         goto error;
 933                 if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 934                     parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
 935                         err = -EINVAL;
 936                         goto error;
 937                 }
 938                 result->params[parse.idx].cipher = parse.p.cipher;
 939                 result->params[parse.idx].key_len = parse.p.key_len;
 940                 result->params[parse.idx].key = result->data[parse.idx];
 941                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 942
 943                 /* must be WEP key if we got here */
 944                 if (no_ht)
 945                         *no_ht = true;
 946         }
 947
 948         if (result->def < 0) {
 949                 err = -EINVAL;
 950                 goto error;
 951         }
 952
 953         return result;
 954  error:
 955         kfree(result);
 956         return ERR_PTR(err);
 957 }
 958
 959 static int nl80211_key_allowed(struct wireless_dev *wdev)
 960 {
 961         ASSERT_WDEV_LOCK(wdev);
 962
 963         switch (wdev->iftype) {
 964         case NL80211_IFTYPE_AP:
 965         case NL80211_IFTYPE_AP_VLAN:
 966         case NL80211_IFTYPE_P2P_GO:
 967         case NL80211_IFTYPE_MESH_POINT:
 968                 break;
 969         case NL80211_IFTYPE_ADHOC:
 970         case NL80211_IFTYPE_STATION:
 971         case NL80211_IFTYPE_P2P_CLIENT:
 972                 if (!wdev->current_bss)
 973                         return -ENOLINK;
 974                 break;
 975         case NL80211_IFTYPE_UNSPECIFIED:
 976         case NL80211_IFTYPE_OCB:
 977         case NL80211_IFTYPE_MONITOR:
 978         case NL80211_IFTYPE_NAN:
 979         case NL80211_IFTYPE_P2P_DEVICE:
 980         case NL80211_IFTYPE_WDS:
 981         case NUM_NL80211_IFTYPES:
 982                 return -EINVAL;
 983         }
 984
 985         return 0;
 986 }
 987
 988 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 989                                                         struct nlattr *tb)
 990 {
 991         struct ieee80211_channel *chan;
 992
 993         if (tb == NULL)
 994                 return NULL;
 995         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 996         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 997                 return NULL;
 998         return chan;
 999 }
1000
1001 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
1002 {
1003         struct nlattr *nl_modes = nla_nest_start(msg, attr);
1004         int i;
1005
1006         if (!nl_modes)
1007                 goto nla_put_failure;
1008
1009         i = 0;
1010         while (ifmodes) {
1011                 if ((ifmodes & 1) && nla_put_flag(msg, i))
1012                         goto nla_put_failure;
1013                 ifmodes >>= 1;
1014                 i++;
1015         }
1016
1017         nla_nest_end(msg, nl_modes);
1018         return 0;
1019
1020 nla_put_failure:
1021         return -ENOBUFS;
1022 }
1023
1024 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
1025                                           struct sk_buff *msg,
1026                                           bool large)
1027 {
1028         struct nlattr *nl_combis;
1029         int i, j;
1030
1031         nl_combis = nla_nest_start(msg,
1032                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
1033         if (!nl_combis)
1034                 goto nla_put_failure;
1035
1036         for (i = 0; i < wiphy->n_iface_combinations; i++) {
1037                 const struct ieee80211_iface_combination *c;
1038                 struct nlattr *nl_combi, *nl_limits;
1039
1040                 c = &wiphy->iface_combinations[i];
1041
1042                 nl_combi = nla_nest_start(msg, i + 1);
1043                 if (!nl_combi)
1044                         goto nla_put_failure;
1045
1046                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
1047                 if (!nl_limits)
1048                         goto nla_put_failure;
1049
1050                 for (j = 0; j < c->n_limits; j++) {
1051                         struct nlattr *nl_limit;
1052
1053                         nl_limit = nla_nest_start(msg, j + 1);
1054                         if (!nl_limit)
1055                                 goto nla_put_failure;
1056                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1057                                         c->limits[j].max))
1058                                 goto nla_put_failure;
1059                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1060                                                 c->limits[j].types))
1061                                 goto nla_put_failure;
1062                         nla_nest_end(msg, nl_limit);
1063                 }
1064
1065                 nla_nest_end(msg, nl_limits);
1066
1067                 if (c->beacon_int_infra_match &&
1068                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1069                         goto nla_put_failure;
1070                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1071                                 c->num_different_channels) ||
1072                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1073                                 c->max_interfaces))
1074                         goto nla_put_failure;
1075                 if (large &&
1076                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1077                                 c->radar_detect_widths) ||
1078                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1079                                 c->radar_detect_regions)))
1080                         goto nla_put_failure;
1081                 if (c->beacon_int_min_gcd &&
1082                     nla_put_u32(msg, NL80211_IFACE_COMB_BI_MIN_GCD,
1083                                 c->beacon_int_min_gcd))
1084                         goto nla_put_failure;
1085
1086                 nla_nest_end(msg, nl_combi);
1087         }
1088
1089         nla_nest_end(msg, nl_combis);
1090
1091         return 0;
1092 nla_put_failure:
1093         return -ENOBUFS;
1094 }
1095
1096 #ifdef CONFIG_PM
1097 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1098                                         struct sk_buff *msg)
1099 {
1100         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1101         struct nlattr *nl_tcp;
1102
1103         if (!tcp)
1104                 return 0;
1105
1106         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1107         if (!nl_tcp)
1108                 return -ENOBUFS;
1109
1110         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1111                         tcp->data_payload_max))
1112                 return -ENOBUFS;
1113
1114         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1115                         tcp->data_payload_max))
1116                 return -ENOBUFS;
1117
1118         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1119                 return -ENOBUFS;
1120
1121         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1122                                 sizeof(*tcp->tok), tcp->tok))
1123                 return -ENOBUFS;
1124
1125         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1126                         tcp->data_interval_max))
1127                 return -ENOBUFS;
1128
1129         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1130                         tcp->wake_payload_max))
1131                 return -ENOBUFS;
1132
1133         nla_nest_end(msg, nl_tcp);
1134         return 0;
1135 }
1136
1137 static int nl80211_send_wowlan(struct sk_buff *msg,
1138                                struct cfg80211_registered_device *rdev,
1139                                bool large)
1140 {
1141         struct nlattr *nl_wowlan;
1142
1143         if (!rdev->wiphy.wowlan)
1144                 return 0;
1145
1146         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1147         if (!nl_wowlan)
1148                 return -ENOBUFS;
1149
1150         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1151              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1152             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1153              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1154             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1155              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1156             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1157              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1158             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1159              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1160             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1161              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1162             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1163              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1164             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1165              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1166                 return -ENOBUFS;
1167
1168         if (rdev->wiphy.wowlan->n_patterns) {
1169                 struct nl80211_pattern_support pat = {
1170                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1171                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1172                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1173                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1174                 };
1175
1176                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1177                             sizeof(pat), &pat))
1178                         return -ENOBUFS;
1179         }
1180
1181         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1182             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1183                         rdev->wiphy.wowlan->max_nd_match_sets))
1184                 return -ENOBUFS;
1185
1186         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1187                 return -ENOBUFS;
1188
1189         nla_nest_end(msg, nl_wowlan);
1190
1191         return 0;
1192 }
1193 #endif
1194
1195 static int nl80211_send_coalesce(struct sk_buff *msg,
1196                                  struct cfg80211_registered_device *rdev)
1197 {
1198         struct nl80211_coalesce_rule_support rule;
1199
1200         if (!rdev->wiphy.coalesce)
1201                 return 0;
1202
1203         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1204         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1205         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1206         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1207         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1208         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1209
1210         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1211                 return -ENOBUFS;
1212
1213         return 0;
1214 }
1215
1216 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1217                                       struct ieee80211_supported_band *sband)
1218 {
1219         struct nlattr *nl_rates, *nl_rate;
1220         struct ieee80211_rate *rate;
1221         int i;
1222
1223         /* add HT info */
1224         if (sband->ht_cap.ht_supported &&
1225             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1226                      sizeof(sband->ht_cap.mcs),
1227                      &sband->ht_cap.mcs) ||
1228              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1229                          sband->ht_cap.cap) ||
1230              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1231                         sband->ht_cap.ampdu_factor) ||
1232              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1233                         sband->ht_cap.ampdu_density)))
1234                 return -ENOBUFS;
1235
1236         /* add VHT info */
1237         if (sband->vht_cap.vht_supported &&
1238             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1239                      sizeof(sband->vht_cap.vht_mcs),
1240                      &sband->vht_cap.vht_mcs) ||
1241              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1242                          sband->vht_cap.cap)))
1243                 return -ENOBUFS;
1244
1245         /* add bitrates */
1246         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1247         if (!nl_rates)
1248                 return -ENOBUFS;
1249
1250         for (i = 0; i < sband->n_bitrates; i++) {
1251                 nl_rate = nla_nest_start(msg, i);
1252                 if (!nl_rate)
1253                         return -ENOBUFS;
1254
1255                 rate = &sband->bitrates[i];
1256                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1257                                 rate->bitrate))
1258                         return -ENOBUFS;
1259                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1260                     nla_put_flag(msg,
1261                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1262                         return -ENOBUFS;
1263
1264                 nla_nest_end(msg, nl_rate);
1265         }
1266
1267         nla_nest_end(msg, nl_rates);
1268
1269         return 0;
1270 }
1271
1272 static int
1273 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1274                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1275 {
1276         u16 stypes;
1277         struct nlattr *nl_ftypes, *nl_ifs;
1278         enum nl80211_iftype ift;
1279         int i;
1280
1281         if (!mgmt_stypes)
1282                 return 0;
1283
1284         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1285         if (!nl_ifs)
1286                 return -ENOBUFS;
1287
1288         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1289                 nl_ftypes = nla_nest_start(msg, ift);
1290                 if (!nl_ftypes)
1291                         return -ENOBUFS;
1292                 i = 0;
1293                 stypes = mgmt_stypes[ift].tx;
1294                 while (stypes) {
1295                         if ((stypes & 1) &&
1296                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1297                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1298                                 return -ENOBUFS;
1299                         stypes >>= 1;
1300                         i++;
1301                 }
1302                 nla_nest_end(msg, nl_ftypes);
1303         }
1304
1305         nla_nest_end(msg, nl_ifs);
1306
1307         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1308         if (!nl_ifs)
1309                 return -ENOBUFS;
1310
1311         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1312                 nl_ftypes = nla_nest_start(msg, ift);
1313                 if (!nl_ftypes)
1314                         return -ENOBUFS;
1315                 i = 0;
1316                 stypes = mgmt_stypes[ift].rx;
1317                 while (stypes) {
1318                         if ((stypes & 1) &&
1319                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1320                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1321                                 return -ENOBUFS;
1322                         stypes >>= 1;
1323                         i++;
1324                 }
1325                 nla_nest_end(msg, nl_ftypes);
1326         }
1327         nla_nest_end(msg, nl_ifs);
1328
1329         return 0;
1330 }
1331
1332 #define CMD(op, n)                                                      \
1333          do {                                                           \
1334                 if (rdev->ops->op) {                                    \
1335                         i++;                                            \
1336                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n))     \
1337                                 goto nla_put_failure;                   \
1338                 }                                                       \
1339         } while (0)
1340
1341 static int nl80211_add_commands_unsplit(struct cfg80211_registered_device *rdev,
1342                                         struct sk_buff *msg)
1343 {
1344         int i = 0;
1345
1346         /*
1347          * do *NOT* add anything into this function, new things need to be
1348          * advertised only to new versions of userspace that can deal with
1349          * the split (and they can't possibly care about new features...
1350          */
1351         CMD(add_virtual_intf, NEW_INTERFACE);
1352         CMD(change_virtual_intf, SET_INTERFACE);
1353         CMD(add_key, NEW_KEY);
1354         CMD(start_ap, START_AP);
1355         CMD(add_station, NEW_STATION);
1356         CMD(add_mpath, NEW_MPATH);
1357         CMD(update_mesh_config, SET_MESH_CONFIG);
1358         CMD(change_bss, SET_BSS);
1359         CMD(auth, AUTHENTICATE);
1360         CMD(assoc, ASSOCIATE);
1361         CMD(deauth, DEAUTHENTICATE);
1362         CMD(disassoc, DISASSOCIATE);
1363         CMD(join_ibss, JOIN_IBSS);
1364         CMD(join_mesh, JOIN_MESH);
1365         CMD(set_pmksa, SET_PMKSA);
1366         CMD(del_pmksa, DEL_PMKSA);
1367         CMD(flush_pmksa, FLUSH_PMKSA);
1368         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1369                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1370         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1371         CMD(mgmt_tx, FRAME);
1372         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1373         if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1374                 i++;
1375                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1376                         goto nla_put_failure;
1377         }
1378         if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1379             rdev->ops->join_mesh) {
1380                 i++;
1381                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1382                         goto nla_put_failure;
1383         }
1384         CMD(set_wds_peer, SET_WDS_PEER);
1385         if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1386                 CMD(tdls_mgmt, TDLS_MGMT);
1387                 CMD(tdls_oper, TDLS_OPER);
1388         }
1389         if (rdev->wiphy.max_sched_scan_reqs)
1390                 CMD(sched_scan_start, START_SCHED_SCAN);
1391         CMD(probe_client, PROBE_CLIENT);
1392         CMD(set_noack_map, SET_NOACK_MAP);
1393         if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1394                 i++;
1395                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1396                         goto nla_put_failure;
1397         }
1398         CMD(start_p2p_device, START_P2P_DEVICE);
1399         CMD(set_mcast_rate, SET_MCAST_RATE);
1400 #ifdef CONFIG_NL80211_TESTMODE
1401         CMD(testmode_cmd, TESTMODE);
1402 #endif
1403
1404         if (rdev->ops->connect || rdev->ops->auth) {
1405                 i++;
1406                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1407                         goto nla_put_failure;
1408         }
1409
1410         if (rdev->ops->disconnect || rdev->ops->deauth) {
1411                 i++;
1412                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1413                         goto nla_put_failure;
1414         }
1415
1416         return i;
1417  nla_put_failure:
1418         return -ENOBUFS;
1419 }
1420
1421 struct nl80211_dump_wiphy_state {
1422         s64 filter_wiphy;
1423         long start;
1424         long split_start, band_start, chan_start, capa_start;
1425         bool split;
1426 };
1427
1428 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1429                               enum nl80211_commands cmd,
1430                               struct sk_buff *msg, u32 portid, u32 seq,
1431                               int flags, struct nl80211_dump_wiphy_state *state)
1432 {
1433         void *hdr;
1434         struct nlattr *nl_bands, *nl_band;
1435         struct nlattr *nl_freqs, *nl_freq;
1436         struct nlattr *nl_cmds;
1437         enum nl80211_band band;
1438         struct ieee80211_channel *chan;
1439         int i;
1440         const struct ieee80211_txrx_stypes *mgmt_stypes =
1441                                 rdev->wiphy.mgmt_stypes;
1442         u32 features;
1443
1444         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1445         if (!hdr)
1446                 return -ENOBUFS;
1447
1448         if (WARN_ON(!state))
1449                 return -EINVAL;
1450
1451         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1452             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1453                            wiphy_name(&rdev->wiphy)) ||
1454             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1455                         cfg80211_rdev_list_generation))
1456                 goto nla_put_failure;
1457
1458         if (cmd != NL80211_CMD_NEW_WIPHY)
1459                 goto finish;
1460
1461         switch (state->split_start) {
1462         case 0:
1463                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1464                                rdev->wiphy.retry_short) ||
1465                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1466                                rdev->wiphy.retry_long) ||
1467                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1468                                 rdev->wiphy.frag_threshold) ||
1469                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1470                                 rdev->wiphy.rts_threshold) ||
1471                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1472                                rdev->wiphy.coverage_class) ||
1473                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1474                                rdev->wiphy.max_scan_ssids) ||
1475                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1476                                rdev->wiphy.max_sched_scan_ssids) ||
1477                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1478                                 rdev->wiphy.max_scan_ie_len) ||
1479                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1480                                 rdev->wiphy.max_sched_scan_ie_len) ||
1481                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1482                                rdev->wiphy.max_match_sets) ||
1483                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1484                                 rdev->wiphy.max_sched_scan_plans) ||
1485                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1486                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1487                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1488                                 rdev->wiphy.max_sched_scan_plan_iterations))
1489                         goto nla_put_failure;
1490
1491                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1492                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1493                         goto nla_put_failure;
1494                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1495                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1496                         goto nla_put_failure;
1497                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1498                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1499                         goto nla_put_failure;
1500                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1501                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1502                         goto nla_put_failure;
1503                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1504                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1505                         goto nla_put_failure;
1506                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1507                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1508                         goto nla_put_failure;
1509                 state->split_start++;
1510                 if (state->split)
1511                         break;
1512         case 1:
1513                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1514                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1515                             rdev->wiphy.cipher_suites))
1516                         goto nla_put_failure;
1517
1518                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1519                                rdev->wiphy.max_num_pmkids))
1520                         goto nla_put_failure;
1521
1522                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1523                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1524                         goto nla_put_failure;
1525
1526                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1527                                 rdev->wiphy.available_antennas_tx) ||
1528                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1529                                 rdev->wiphy.available_antennas_rx))
1530                         goto nla_put_failure;
1531
1532                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1533                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1534                                 rdev->wiphy.probe_resp_offload))
1535                         goto nla_put_failure;
1536
1537                 if ((rdev->wiphy.available_antennas_tx ||
1538                      rdev->wiphy.available_antennas_rx) &&
1539                     rdev->ops->get_antenna) {
1540                         u32 tx_ant = 0, rx_ant = 0;
1541                         int res;
1542
1543                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1544                         if (!res) {
1545                                 if (nla_put_u32(msg,
1546                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1547                                                 tx_ant) ||
1548                                     nla_put_u32(msg,
1549                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1550                                                 rx_ant))
1551                                         goto nla_put_failure;
1552                         }
1553                 }
1554
1555                 state->split_start++;
1556                 if (state->split)
1557                         break;
1558         case 2:
1559                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1560                                         rdev->wiphy.interface_modes))
1561                                 goto nla_put_failure;
1562                 state->split_start++;
1563                 if (state->split)
1564                         break;
1565         case 3:
1566                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1567                 if (!nl_bands)
1568                         goto nla_put_failure;
1569
1570                 for (band = state->band_start;
1571                      band < NUM_NL80211_BANDS; band++) {
1572                         struct ieee80211_supported_band *sband;
1573
1574                         sband = rdev->wiphy.bands[band];
1575
1576                         if (!sband)
1577                                 continue;
1578
1579                         nl_band = nla_nest_start(msg, band);
1580                         if (!nl_band)
1581                                 goto nla_put_failure;
1582
1583                         switch (state->chan_start) {
1584                         case 0:
1585                                 if (nl80211_send_band_rateinfo(msg, sband))
1586                                         goto nla_put_failure;
1587                                 state->chan_start++;
1588                                 if (state->split)
1589                                         break;
1590                         default:
1591                                 /* add frequencies */
1592                                 nl_freqs = nla_nest_start(
1593                                         msg, NL80211_BAND_ATTR_FREQS);
1594                                 if (!nl_freqs)
1595                                         goto nla_put_failure;
1596
1597                                 for (i = state->chan_start - 1;
1598                                      i < sband->n_channels;
1599                                      i++) {
1600                                         nl_freq = nla_nest_start(msg, i);
1601                                         if (!nl_freq)
1602                                                 goto nla_put_failure;
1603
1604                                         chan = &sband->channels[i];
1605
1606                                         if (nl80211_msg_put_channel(
1607                                                         msg, chan,
1608                                                         state->split))
1609                                                 goto nla_put_failure;
1610
1611                                         nla_nest_end(msg, nl_freq);
1612                                         if (state->split)
1613                                                 break;
1614                                 }
1615                                 if (i < sband->n_channels)
1616                                         state->chan_start = i + 2;
1617                                 else
1618                                         state->chan_start = 0;
1619                                 nla_nest_end(msg, nl_freqs);
1620                         }
1621
1622                         nla_nest_end(msg, nl_band);
1623
1624                         if (state->split) {
1625                                 /* start again here */
1626                                 if (state->chan_start)
1627                                         band--;
1628                                 break;
1629                         }
1630                 }
1631                 nla_nest_end(msg, nl_bands);
1632
1633                 if (band < NUM_NL80211_BANDS)
1634                         state->band_start = band + 1;
1635                 else
1636                         state->band_start = 0;
1637
1638                 /* if bands & channels are done, continue outside */
1639                 if (state->band_start == 0 && state->chan_start == 0)
1640                         state->split_start++;
1641                 if (state->split)
1642                         break;
1643         case 4:
1644                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1645                 if (!nl_cmds)
1646                         goto nla_put_failure;
1647
1648                 i = nl80211_add_commands_unsplit(rdev, msg);
1649                 if (i < 0)
1650                         goto nla_put_failure;
1651                 if (state->split) {
1652                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1653                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1654                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1655                                 CMD(channel_switch, CHANNEL_SWITCH);
1656                         CMD(set_qos_map, SET_QOS_MAP);
1657                         if (rdev->wiphy.features &
1658                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1659                                 CMD(add_tx_ts, ADD_TX_TS);
1660                         CMD(set_multicast_to_unicast, SET_MULTICAST_TO_UNICAST);
1661                         CMD(update_connect_params, UPDATE_CONNECT_PARAMS);
1662                 }
1663 #undef CMD
1664
1665                 nla_nest_end(msg, nl_cmds);
1666                 state->split_start++;
1667                 if (state->split)
1668                         break;
1669         case 5:
1670                 if (rdev->ops->remain_on_channel &&
1671                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1672                     nla_put_u32(msg,
1673                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1674                                 rdev->wiphy.max_remain_on_channel_duration))
1675                         goto nla_put_failure;
1676
1677                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1678                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1679                         goto nla_put_failure;
1680
1681                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1682                         goto nla_put_failure;
1683                 state->split_start++;
1684                 if (state->split)
1685                         break;
1686         case 6:
1687 #ifdef CONFIG_PM
1688                 if (nl80211_send_wowlan(msg, rdev, state->split))
1689                         goto nla_put_failure;
1690                 state->split_start++;
1691                 if (state->split)
1692                         break;
1693 #else
1694                 state->split_start++;
1695 #endif
1696         case 7:
1697                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1698                                         rdev->wiphy.software_iftypes))
1699                         goto nla_put_failure;
1700
1701                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1702                                                    state->split))
1703                         goto nla_put_failure;
1704
1705                 state->split_start++;
1706                 if (state->split)
1707                         break;
1708         case 8:
1709                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1710                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1711                                 rdev->wiphy.ap_sme_capa))
1712                         goto nla_put_failure;
1713
1714                 features = rdev->wiphy.features;
1715                 /*
1716                  * We can only add the per-channel limit information if the
1717                  * dump is split, otherwise it makes it too big. Therefore
1718                  * only advertise it in that case.
1719                  */
1720                 if (state->split)
1721                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1722                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1723                         goto nla_put_failure;
1724
1725                 if (rdev->wiphy.ht_capa_mod_mask &&
1726                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1727                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1728                             rdev->wiphy.ht_capa_mod_mask))
1729                         goto nla_put_failure;
1730
1731                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1732                     rdev->wiphy.max_acl_mac_addrs &&
1733                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1734                                 rdev->wiphy.max_acl_mac_addrs))
1735                         goto nla_put_failure;
1736
1737                 /*
1738                  * Any information below this point is only available to
1739                  * applications that can deal with it being split. This
1740                  * helps ensure that newly added capabilities don't break
1741                  * older tools by overrunning their buffers.
1742                  *
1743                  * We still increment split_start so that in the split
1744                  * case we'll continue with more data in the next round,
1745                  * but break unconditionally so unsplit data stops here.
1746                  */
1747                 state->split_start++;
1748                 break;
1749         case 9:
1750                 if (rdev->wiphy.extended_capabilities &&
1751                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1752                              rdev->wiphy.extended_capabilities_len,
1753                              rdev->wiphy.extended_capabilities) ||
1754                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1755                              rdev->wiphy.extended_capabilities_len,
1756                              rdev->wiphy.extended_capabilities_mask)))
1757                         goto nla_put_failure;
1758
1759                 if (rdev->wiphy.vht_capa_mod_mask &&
1760                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1761                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1762                             rdev->wiphy.vht_capa_mod_mask))
1763                         goto nla_put_failure;
1764
1765                 state->split_start++;
1766                 break;
1767         case 10:
1768                 if (nl80211_send_coalesce(msg, rdev))
1769                         goto nla_put_failure;
1770
1771                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1772                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1773                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1774                         goto nla_put_failure;
1775
1776                 if (rdev->wiphy.max_ap_assoc_sta &&
1777                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1778                                 rdev->wiphy.max_ap_assoc_sta))
1779                         goto nla_put_failure;
1780
1781                 state->split_start++;
1782                 break;
1783         case 11:
1784                 if (rdev->wiphy.n_vendor_commands) {
1785                         const struct nl80211_vendor_cmd_info *info;
1786                         struct nlattr *nested;
1787
1788                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1789                         if (!nested)
1790                                 goto nla_put_failure;
1791
1792                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1793                                 info = &rdev->wiphy.vendor_commands[i].info;
1794                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1795                                         goto nla_put_failure;
1796                         }
1797                         nla_nest_end(msg, nested);
1798                 }
1799
1800                 if (rdev->wiphy.n_vendor_events) {
1801                         const struct nl80211_vendor_cmd_info *info;
1802                         struct nlattr *nested;
1803
1804                         nested = nla_nest_start(msg,
1805                                                 NL80211_ATTR_VENDOR_EVENTS);
1806                         if (!nested)
1807                                 goto nla_put_failure;
1808
1809                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1810                                 info = &rdev->wiphy.vendor_events[i];
1811                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1812                                         goto nla_put_failure;
1813                         }
1814                         nla_nest_end(msg, nested);
1815                 }
1816                 state->split_start++;
1817                 break;
1818         case 12:
1819                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1820                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1821                                rdev->wiphy.max_num_csa_counters))
1822                         goto nla_put_failure;
1823
1824                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1825                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1826                         goto nla_put_failure;
1827
1828                 if (rdev->wiphy.max_sched_scan_reqs &&
1829                     nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_MAX_REQS,
1830                                 rdev->wiphy.max_sched_scan_reqs))
1831                         goto nla_put_failure;
1832
1833                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1834                             sizeof(rdev->wiphy.ext_features),
1835                             rdev->wiphy.ext_features))
1836                         goto nla_put_failure;
1837
1838                 if (rdev->wiphy.bss_select_support) {
1839                         struct nlattr *nested;
1840                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1841
1842                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1843                         if (!nested)
1844                                 goto nla_put_failure;
1845
1846                         i = 0;
1847                         while (bss_select_support) {
1848                                 if ((bss_select_support & 1) &&
1849                                     nla_put_flag(msg, i))
1850                                         goto nla_put_failure;
1851                                 i++;
1852                                 bss_select_support >>= 1;
1853                         }
1854                         nla_nest_end(msg, nested);
1855                 }
1856
1857                 state->split_start++;
1858                 break;
1859         case 13:
1860                 if (rdev->wiphy.num_iftype_ext_capab &&
1861                     rdev->wiphy.iftype_ext_capab) {
1862                         struct nlattr *nested_ext_capab, *nested;
1863
1864                         nested = nla_nest_start(msg,
1865                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1866                         if (!nested)
1867                                 goto nla_put_failure;
1868
1869                         for (i = state->capa_start;
1870                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1871                                 const struct wiphy_iftype_ext_capab *capab;
1872
1873                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1874
1875                                 nested_ext_capab = nla_nest_start(msg, i);
1876                                 if (!nested_ext_capab ||
1877                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1878                                                 capab->iftype) ||
1879                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1880                                             capab->extended_capabilities_len,
1881                                             capab->extended_capabilities) ||
1882                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1883                                             capab->extended_capabilities_len,
1884                                             capab->extended_capabilities_mask))
1885                                         goto nla_put_failure;
1886
1887                                 nla_nest_end(msg, nested_ext_capab);
1888                                 if (state->split)
1889                                         break;
1890                         }
1891                         nla_nest_end(msg, nested);
1892                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1893                                 state->capa_start = i + 1;
1894                                 break;
1895                         }
1896                 }
1897
1898                 if (nla_put_u32(msg, NL80211_ATTR_BANDS,
1899                                 rdev->wiphy.nan_supported_bands))
1900                         goto nla_put_failure;
1901
1902                 /* done */
1903                 state->split_start = 0;
1904                 break;
1905         }
1906  finish:
1907         genlmsg_end(msg, hdr);
1908         return 0;
1909
1910  nla_put_failure:
1911         genlmsg_cancel(msg, hdr);
1912         return -EMSGSIZE;
1913 }
1914
1915 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1916                                     struct netlink_callback *cb,
1917                                     struct nl80211_dump_wiphy_state *state)
1918 {
1919         struct nlattr **tb = genl_family_attrbuf(&nl80211_fam);
1920         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, tb,
1921                               nl80211_fam.maxattr, nl80211_policy, NULL);
1922         /* ignore parse errors for backward compatibility */
1923         if (ret)
1924                 return 0;
1925
1926         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1927         if (tb[NL80211_ATTR_WIPHY])
1928                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1929         if (tb[NL80211_ATTR_WDEV])
1930                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1931         if (tb[NL80211_ATTR_IFINDEX]) {
1932                 struct net_device *netdev;
1933                 struct cfg80211_registered_device *rdev;
1934                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1935
1936                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1937                 if (!netdev)
1938                         return -ENODEV;
1939                 if (netdev->ieee80211_ptr) {
1940                         rdev = wiphy_to_rdev(
1941                                 netdev->ieee80211_ptr->wiphy);
1942                         state->filter_wiphy = rdev->wiphy_idx;
1943                 }
1944         }
1945
1946         return 0;
1947 }
1948
1949 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1950 {
1951         int idx = 0, ret;
1952         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1953         struct cfg80211_registered_device *rdev;
1954
1955         rtnl_lock();
1956         if (!state) {
1957                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1958                 if (!state) {
1959                         rtnl_unlock();
1960                         return -ENOMEM;
1961                 }
1962                 state->filter_wiphy = -1;
1963                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1964                 if (ret) {
1965                         kfree(state);
1966                         rtnl_unlock();
1967                         return ret;
1968                 }
1969                 cb->args[0] = (long)state;
1970         }
1971
1972         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1973                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1974                         continue;
1975                 if (++idx <= state->start)
1976                         continue;
1977                 if (state->filter_wiphy != -1 &&
1978                     state->filter_wiphy != rdev->wiphy_idx)
1979                         continue;
1980                 /* attempt to fit multiple wiphy data chunks into the skb */
1981                 do {
1982                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1983                                                  skb,
1984                                                  NETLINK_CB(cb->skb).portid,
1985                                                  cb->nlh->nlmsg_seq,
1986                                                  NLM_F_MULTI, state);
1987                         if (ret < 0) {
1988                                 /*
1989                                  * If sending the wiphy data didn't fit (ENOBUFS
1990                                  * or EMSGSIZE returned), this SKB is still
1991                                  * empty (so it's not too big because another
1992                                  * wiphy dataset is already in the skb) and
1993                                  * we've not tried to adjust the dump allocation
1994                                  * yet ... then adjust the alloc size to be
1995                                  * bigger, and return 1 but with the empty skb.
1996                                  * This results in an empty message being RX'ed
1997                                  * in userspace, but that is ignored.
1998                                  *
1999                                  * We can then retry with the larger buffer.
2000                                  */
2001                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
2002                                     !skb->len && !state->split &&
2003                                     cb->min_dump_alloc < 4096) {
2004                                         cb->min_dump_alloc = 4096;
2005                                         state->split_start = 0;
2006                                         rtnl_unlock();
2007                                         return 1;
2008                                 }
2009                                 idx--;
2010                                 break;
2011                         }
2012                 } while (state->split_start > 0);
2013                 break;
2014         }
2015         rtnl_unlock();
2016
2017         state->start = idx;
2018
2019         return skb->len;
2020 }
2021
2022 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
2023 {
2024         kfree((void *)cb->args[0]);
2025         return 0;
2026 }
2027
2028 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
2029 {
2030         struct sk_buff *msg;
2031         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2032         struct nl80211_dump_wiphy_state state = {};
2033
2034         msg = nlmsg_new(4096, GFP_KERNEL);
2035         if (!msg)
2036                 return -ENOMEM;
2037
2038         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
2039                                info->snd_portid, info->snd_seq, 0,
2040                                &state) < 0) {
2041                 nlmsg_free(msg);
2042                 return -ENOBUFS;
2043         }
2044
2045         return genlmsg_reply(msg, info);
2046 }
2047
2048 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
2049         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
2050         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
2051         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
2052         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
2053         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
2054 };
2055
2056 static int parse_txq_params(struct nlattr *tb[],
2057                             struct ieee80211_txq_params *txq_params)
2058 {
2059         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
2060             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
2061             !tb[NL80211_TXQ_ATTR_AIFS])
2062                 return -EINVAL;
2063
2064         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
2065         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
2066         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
2067         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
2068         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
2069
2070         if (txq_params->ac >= NL80211_NUM_ACS)
2071                 return -EINVAL;
2072
2073         return 0;
2074 }
2075
2076 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
2077 {
2078         /*
2079          * You can only set the channel explicitly for WDS interfaces,
2080          * all others have their channel managed via their respective
2081          * "establish a connection" command (connect, join, ...)
2082          *
2083          * For AP/GO and mesh mode, the channel can be set with the
2084          * channel userspace API, but is only stored and passed to the
2085          * low-level driver when the AP starts or the mesh is joined.
2086          * This is for backward compatibility, userspace can also give
2087          * the channel in the start-ap or join-mesh commands instead.
2088          *
2089          * Monitors are special as they are normally slaved to
2090          * whatever else is going on, so they have their own special
2091          * operation to set the monitor channel if possible.
2092          */
2093         return !wdev ||
2094                 wdev->iftype == NL80211_IFTYPE_AP ||
2095                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2096                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2097                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2098 }
2099
2100 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2101                                  struct genl_info *info,
2102                                  struct cfg80211_chan_def *chandef)
2103 {
2104         u32 control_freq;
2105
2106         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2107                 return -EINVAL;
2108
2109         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2110
2111         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2112         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2113         chandef->center_freq1 = control_freq;
2114         chandef->center_freq2 = 0;
2115
2116         /* Primary channel not allowed */
2117         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2118                 return -EINVAL;
2119
2120         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2121                 enum nl80211_channel_type chantype;
2122
2123                 chantype = nla_get_u32(
2124                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2125
2126                 switch (chantype) {
2127                 case NL80211_CHAN_NO_HT:
2128                 case NL80211_CHAN_HT20:
2129                 case NL80211_CHAN_HT40PLUS:
2130                 case NL80211_CHAN_HT40MINUS:
2131                         cfg80211_chandef_create(chandef, chandef->chan,
2132                                                 chantype);
2133                         break;
2134                 default:
2135                         return -EINVAL;
2136                 }
2137         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2138                 chandef->width =
2139                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2140                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2141                         chandef->center_freq1 =
2142                                 nla_get_u32(
2143                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2144                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2145                         chandef->center_freq2 =
2146                                 nla_get_u32(
2147                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2148         }
2149
2150         if (!cfg80211_chandef_valid(chandef))
2151                 return -EINVAL;
2152
2153         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2154                                      IEEE80211_CHAN_DISABLED))
2155                 return -EINVAL;
2156
2157         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2158              chandef->width == NL80211_CHAN_WIDTH_10) &&
2159             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2160                 return -EINVAL;
2161
2162         return 0;
2163 }
2164
2165 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2166                                  struct net_device *dev,
2167                                  struct genl_info *info)
2168 {
2169         struct cfg80211_chan_def chandef;
2170         int result;
2171         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2172         struct wireless_dev *wdev = NULL;
2173
2174         if (dev)
2175                 wdev = dev->ieee80211_ptr;
2176         if (!nl80211_can_set_dev_channel(wdev))
2177                 return -EOPNOTSUPP;
2178         if (wdev)
2179                 iftype = wdev->iftype;
2180
2181         result = nl80211_parse_chandef(rdev, info, &chandef);
2182         if (result)
2183                 return result;
2184
2185         switch (iftype) {
2186         case NL80211_IFTYPE_AP:
2187         case NL80211_IFTYPE_P2P_GO:
2188                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2189                                                    iftype)) {
2190                         result = -EINVAL;
2191                         break;
2192                 }
2193                 if (wdev->beacon_interval) {
2194                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2195                             !(rdev->wiphy.features &
2196                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2197                                 result = -EBUSY;
2198                                 break;
2199                         }
2200
2201                         /* Only allow dynamic channel width changes */
2202                         if (chandef.chan != wdev->preset_chandef.chan) {
2203                                 result = -EBUSY;
2204                                 break;
2205                         }
2206                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2207                         if (result)
2208                                 break;
2209                 }
2210                 wdev->preset_chandef = chandef;
2211                 result = 0;
2212                 break;
2213         case NL80211_IFTYPE_MESH_POINT:
2214                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2215                 break;
2216         case NL80211_IFTYPE_MONITOR:
2217                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2218                 break;
2219         default:
2220                 result = -EINVAL;
2221         }
2222
2223         return result;
2224 }
2225
2226 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2227 {
2228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2229         struct net_device *netdev = info->user_ptr[1];
2230
2231         return __nl80211_set_channel(rdev, netdev, info);
2232 }
2233
2234 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2235 {
2236         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2237         struct net_device *dev = info->user_ptr[1];
2238         struct wireless_dev *wdev = dev->ieee80211_ptr;
2239         const u8 *bssid;
2240
2241         if (!info->attrs[NL80211_ATTR_MAC])
2242                 return -EINVAL;
2243
2244         if (netif_running(dev))
2245                 return -EBUSY;
2246
2247         if (!rdev->ops->set_wds_peer)
2248                 return -EOPNOTSUPP;
2249
2250         if (wdev->iftype != NL80211_IFTYPE_WDS)
2251                 return -EOPNOTSUPP;
2252
2253         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2254         return rdev_set_wds_peer(rdev, dev, bssid);
2255 }
2256
2257 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2258 {
2259         struct cfg80211_registered_device *rdev;
2260         struct net_device *netdev = NULL;
2261         struct wireless_dev *wdev;
2262         int result = 0, rem_txq_params = 0;
2263         struct nlattr *nl_txq_params;
2264         u32 changed;
2265         u8 retry_short = 0, retry_long = 0;
2266         u32 frag_threshold = 0, rts_threshold = 0;
2267         u8 coverage_class = 0;
2268
2269         ASSERT_RTNL();
2270
2271         /*
2272          * Try to find the wiphy and netdev. Normally this
2273          * function shouldn't need the netdev, but this is
2274          * done for backward compatibility -- previously
2275          * setting the channel was done per wiphy, but now
2276          * it is per netdev. Previous userland like hostapd
2277          * also passed a netdev to set_wiphy, so that it is
2278          * possible to let that go to the right netdev!
2279          */
2280
2281         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2282                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2283
2284                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2285                 if (netdev && netdev->ieee80211_ptr)
2286                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2287                 else
2288                         netdev = NULL;
2289         }
2290
2291         if (!netdev) {
2292                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2293                                                   info->attrs);
2294                 if (IS_ERR(rdev))
2295                         return PTR_ERR(rdev);
2296                 wdev = NULL;
2297                 netdev = NULL;
2298                 result = 0;
2299         } else
2300                 wdev = netdev->ieee80211_ptr;
2301
2302         /*
2303          * end workaround code, by now the rdev is available
2304          * and locked, and wdev may or may not be NULL.
2305          */
2306
2307         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2308                 result = cfg80211_dev_rename(
2309                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2310
2311         if (result)
2312                 return result;
2313
2314         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2315                 struct ieee80211_txq_params txq_params;
2316                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2317
2318                 if (!rdev->ops->set_txq_params)
2319                         return -EOPNOTSUPP;
2320
2321                 if (!netdev)
2322                         return -EINVAL;
2323
2324                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2325                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2326                         return -EINVAL;
2327
2328                 if (!netif_running(netdev))
2329                         return -ENETDOWN;
2330
2331                 nla_for_each_nested(nl_txq_params,
2332                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2333                                     rem_txq_params) {
2334                         result = nla_parse_nested(tb, NL80211_TXQ_ATTR_MAX,
2335                                                   nl_txq_params,
2336                                                   txq_params_policy,
2337                                                   info->extack);
2338                         if (result)
2339                                 return result;
2340                         result = parse_txq_params(tb, &txq_params);
2341                         if (result)
2342                                 return result;
2343
2344                         result = rdev_set_txq_params(rdev, netdev,
2345                                                      &txq_params);
2346                         if (result)
2347                                 return result;
2348                 }
2349         }
2350
2351         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2352                 result = __nl80211_set_channel(
2353                         rdev,
2354                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2355                         info);
2356                 if (result)
2357                         return result;
2358         }
2359
2360         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2361                 struct wireless_dev *txp_wdev = wdev;
2362                 enum nl80211_tx_power_setting type;
2363                 int idx, mbm = 0;
2364
2365                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2366                         txp_wdev = NULL;
2367
2368                 if (!rdev->ops->set_tx_power)
2369                         return -EOPNOTSUPP;
2370
2371                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2372                 type = nla_get_u32(info->attrs[idx]);
2373
2374                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2375                     (type != NL80211_TX_POWER_AUTOMATIC))
2376                         return -EINVAL;
2377
2378                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2379                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2380                         mbm = nla_get_u32(info->attrs[idx]);
2381                 }
2382
2383                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2384                 if (result)
2385                         return result;
2386         }
2387
2388         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2389             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2390                 u32 tx_ant, rx_ant;
2391
2392                 if ((!rdev->wiphy.available_antennas_tx &&
2393                      !rdev->wiphy.available_antennas_rx) ||
2394                     !rdev->ops->set_antenna)
2395                         return -EOPNOTSUPP;
2396
2397                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2398                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2399
2400                 /* reject antenna configurations which don't match the
2401                  * available antenna masks, except for the "all" mask */
2402                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2403                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2404                         return -EINVAL;
2405
2406                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2407                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2408
2409                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2410                 if (result)
2411                         return result;
2412         }
2413
2414         changed = 0;
2415
2416         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2417                 retry_short = nla_get_u8(
2418                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2419                 if (retry_short == 0)
2420                         return -EINVAL;
2421
2422                 changed |= WIPHY_PARAM_RETRY_SHORT;
2423         }
2424
2425         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2426                 retry_long = nla_get_u8(
2427                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2428                 if (retry_long == 0)
2429                         return -EINVAL;
2430
2431                 changed |= WIPHY_PARAM_RETRY_LONG;
2432         }
2433
2434         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2435                 frag_threshold = nla_get_u32(
2436                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2437                 if (frag_threshold < 256)
2438                         return -EINVAL;
2439
2440                 if (frag_threshold != (u32) -1) {
2441                         /*
2442                          * Fragments (apart from the last one) are required to
2443                          * have even length. Make the fragmentation code
2444                          * simpler by stripping LSB should someone try to use
2445                          * odd threshold value.
2446                          */
2447                         frag_threshold &= ~0x1;
2448                 }
2449                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2450         }
2451
2452         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2453                 rts_threshold = nla_get_u32(
2454                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2455                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2456         }
2457
2458         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2459                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2460                         return -EINVAL;
2461
2462                 coverage_class = nla_get_u8(
2463                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2464                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2465         }
2466
2467         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2468                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2469                         return -EOPNOTSUPP;
2470
2471                 changed |= WIPHY_PARAM_DYN_ACK;
2472         }
2473
2474         if (changed) {
2475                 u8 old_retry_short, old_retry_long;
2476                 u32 old_frag_threshold, old_rts_threshold;
2477                 u8 old_coverage_class;
2478
2479                 if (!rdev->ops->set_wiphy_params)
2480                         return -EOPNOTSUPP;
2481
2482                 old_retry_short = rdev->wiphy.retry_short;
2483                 old_retry_long = rdev->wiphy.retry_long;
2484                 old_frag_threshold = rdev->wiphy.frag_threshold;
2485                 old_rts_threshold = rdev->wiphy.rts_threshold;
2486                 old_coverage_class = rdev->wiphy.coverage_class;
2487
2488                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2489                         rdev->wiphy.retry_short = retry_short;
2490                 if (changed & WIPHY_PARAM_RETRY_LONG)
2491                         rdev->wiphy.retry_long = retry_long;
2492                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2493                         rdev->wiphy.frag_threshold = frag_threshold;
2494                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2495                         rdev->wiphy.rts_threshold = rts_threshold;
2496                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2497                         rdev->wiphy.coverage_class = coverage_class;
2498
2499                 result = rdev_set_wiphy_params(rdev, changed);
2500                 if (result) {
2501                         rdev->wiphy.retry_short = old_retry_short;
2502                         rdev->wiphy.retry_long = old_retry_long;
2503                         rdev->wiphy.frag_threshold = old_frag_threshold;
2504                         rdev->wiphy.rts_threshold = old_rts_threshold;
2505                         rdev->wiphy.coverage_class = old_coverage_class;
2506                         return result;
2507                 }
2508         }
2509         return 0;
2510 }
2511
2512 static inline u64 wdev_id(struct wireless_dev *wdev)
2513 {
2514         return (u64)wdev->identifier |
2515                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2516 }
2517
2518 static int nl80211_send_chandef(struct sk_buff *msg,
2519                                 const struct cfg80211_chan_def *chandef)
2520 {
2521         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2522                 return -EINVAL;
2523
2524         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2525                         chandef->chan->center_freq))
2526                 return -ENOBUFS;
2527         switch (chandef->width) {
2528         case NL80211_CHAN_WIDTH_20_NOHT:
2529         case NL80211_CHAN_WIDTH_20:
2530         case NL80211_CHAN_WIDTH_40:
2531                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2532                                 cfg80211_get_chandef_type(chandef)))
2533                         return -ENOBUFS;
2534                 break;
2535         default:
2536                 break;
2537         }
2538         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2539                 return -ENOBUFS;
2540         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2541                 return -ENOBUFS;
2542         if (chandef->center_freq2 &&
2543             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2544                 return -ENOBUFS;
2545         return 0;
2546 }
2547
2548 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2549                               struct cfg80211_registered_device *rdev,
2550                               struct wireless_dev *wdev, bool removal)
2551 {
2552         struct net_device *dev = wdev->netdev;
2553         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2554         void *hdr;
2555
2556         if (removal)
2557                 cmd = NL80211_CMD_DEL_INTERFACE;
2558
2559         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2560         if (!hdr)
2561                 return -1;
2562
2563         if (dev &&
2564             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2565              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2566                 goto nla_put_failure;
2567
2568         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2569             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2570             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2571                               NL80211_ATTR_PAD) ||
2572             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2573             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2574                         rdev->devlist_generation ^
2575                         (cfg80211_rdev_list_generation << 2)))
2576                 goto nla_put_failure;
2577
2578         if (rdev->ops->get_channel) {
2579                 int ret;
2580                 struct cfg80211_chan_def chandef;
2581
2582                 ret = rdev_get_channel(rdev, wdev, &chandef);
2583                 if (ret == 0) {
2584                         if (nl80211_send_chandef(msg, &chandef))
2585                                 goto nla_put_failure;
2586                 }
2587         }
2588
2589         if (rdev->ops->get_tx_power) {
2590                 int dbm, ret;
2591
2592                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2593                 if (ret == 0 &&
2594                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2595                                 DBM_TO_MBM(dbm)))
2596                         goto nla_put_failure;
2597         }
2598
2599         if (wdev->ssid_len) {
2600                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2601                         goto nla_put_failure;
2602         }
2603
2604         genlmsg_end(msg, hdr);
2605         return 0;
2606
2607  nla_put_failure:
2608         genlmsg_cancel(msg, hdr);
2609         return -EMSGSIZE;
2610 }
2611
2612 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2613 {
2614         int wp_idx = 0;
2615         int if_idx = 0;
2616         int wp_start = cb->args[0];
2617         int if_start = cb->args[1];
2618         int filter_wiphy = -1;
2619         struct cfg80211_registered_device *rdev;
2620         struct wireless_dev *wdev;
2621         int ret;
2622
2623         rtnl_lock();
2624         if (!cb->args[2]) {
2625                 struct nl80211_dump_wiphy_state state = {
2626                         .filter_wiphy = -1,
2627                 };
2628
2629                 ret = nl80211_dump_wiphy_parse(skb, cb, &state);
2630                 if (ret)
2631                         goto out_unlock;
2632
2633                 filter_wiphy = state.filter_wiphy;
2634
2635                 /*
2636                  * if filtering, set cb->args[2] to +1 since 0 is the default
2637                  * value needed to determine that parsing is necessary.
2638                  */
2639                 if (filter_wiphy >= 0)
2640                         cb->args[2] = filter_wiphy + 1;
2641                 else
2642                         cb->args[2] = -1;
2643         } else if (cb->args[2] > 0) {
2644                 filter_wiphy = cb->args[2] - 1;
2645         }
2646
2647         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2648                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2649                         continue;
2650                 if (wp_idx < wp_start) {
2651                         wp_idx++;
2652                         continue;
2653                 }
2654
2655                 if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
2656                         continue;
2657
2658                 if_idx = 0;
2659
2660                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2661                         if (if_idx < if_start) {
2662                                 if_idx++;
2663                                 continue;
2664                         }
2665                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2666                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2667                                                rdev, wdev, false) < 0) {
2668                                 goto out;
2669                         }
2670                         if_idx++;
2671                 }
2672
2673                 wp_idx++;
2674         }
2675  out:
2676         cb->args[0] = wp_idx;
2677         cb->args[1] = if_idx;
2678
2679         ret = skb->len;
2680  out_unlock:
2681         rtnl_unlock();
2682
2683         return ret;
2684 }
2685
2686 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2687 {
2688         struct sk_buff *msg;
2689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2690         struct wireless_dev *wdev = info->user_ptr[1];
2691
2692         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2693         if (!msg)
2694                 return -ENOMEM;
2695
2696         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2697                                rdev, wdev, false) < 0) {
2698                 nlmsg_free(msg);
2699                 return -ENOBUFS;
2700         }
2701
2702         return genlmsg_reply(msg, info);
2703 }
2704
2705 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2706         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2707         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2708         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2709         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2710         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2711         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2712 };
2713
2714 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2715 {
2716         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2717         int flag;
2718
2719         *mntrflags = 0;
2720
2721         if (!nla)
2722                 return -EINVAL;
2723
2724         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX, nla,
2725                              mntr_flags_policy, NULL))
2726                 return -EINVAL;
2727
2728         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2729                 if (flags[flag])
2730                         *mntrflags |= (1<<flag);
2731
2732         *mntrflags |= MONITOR_FLAG_CHANGED;
2733
2734         return 0;
2735 }
2736
2737 static int nl80211_parse_mon_options(struct cfg80211_registered_device *rdev,
2738                                      enum nl80211_iftype type,
2739                                      struct genl_info *info,
2740                                      struct vif_params *params)
2741 {
2742         bool change = false;
2743         int err;
2744
2745         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2746                 if (type != NL80211_IFTYPE_MONITOR)
2747                         return -EINVAL;
2748
2749                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2750                                           &params->flags);
2751                 if (err)
2752                         return err;
2753
2754                 change = true;
2755         }
2756
2757         if (params->flags & MONITOR_FLAG_ACTIVE &&
2758             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2759                 return -EOPNOTSUPP;
2760
2761         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2762                 const u8 *mumimo_groups;
2763                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2764
2765                 if (type != NL80211_IFTYPE_MONITOR)
2766                         return -EINVAL;
2767
2768                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2769                         return -EOPNOTSUPP;
2770
2771                 mumimo_groups =
2772                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2773
2774                 /* bits 0 and 63 are reserved and must be zero */
2775                 if ((mumimo_groups[0] & BIT(0)) ||
2776                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(7)))
2777                         return -EINVAL;
2778
2779                 params->vht_mumimo_groups = mumimo_groups;
2780                 change = true;
2781         }
2782
2783         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2784                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2785
2786                 if (type != NL80211_IFTYPE_MONITOR)
2787                         return -EINVAL;
2788
2789                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2790                         return -EOPNOTSUPP;
2791
2792                 params->vht_mumimo_follow_addr =
2793                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]);
2794                 change = true;
2795         }
2796
2797         return change ? 1 : 0;
2798 }
2799
2800 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2801                                struct net_device *netdev, u8 use_4addr,
2802                                enum nl80211_iftype iftype)
2803 {
2804         if (!use_4addr) {
2805                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2806                         return -EBUSY;
2807                 return 0;
2808         }
2809
2810         switch (iftype) {
2811         case NL80211_IFTYPE_AP_VLAN:
2812                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2813                         return 0;
2814                 break;
2815         case NL80211_IFTYPE_STATION:
2816                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2817                         return 0;
2818                 break;
2819         default:
2820                 break;
2821         }
2822
2823         return -EOPNOTSUPP;
2824 }
2825
2826 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2827 {
2828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2829         struct vif_params params;
2830         int err;
2831         enum nl80211_iftype otype, ntype;
2832         struct net_device *dev = info->user_ptr[1];
2833         bool change = false;
2834
2835         memset(&params, 0, sizeof(params));
2836
2837         otype = ntype = dev->ieee80211_ptr->iftype;
2838
2839         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2840                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2841                 if (otype != ntype)
2842                         change = true;
2843                 if (ntype > NL80211_IFTYPE_MAX)
2844                         return -EINVAL;
2845         }
2846
2847         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2848                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2849
2850                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2851                         return -EINVAL;
2852                 if (netif_running(dev))
2853                         return -EBUSY;
2854
2855                 wdev_lock(wdev);
2856                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2857                              IEEE80211_MAX_MESH_ID_LEN);
2858                 wdev->mesh_id_up_len =
2859                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2860                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2861                        wdev->mesh_id_up_len);
2862                 wdev_unlock(wdev);
2863         }
2864
2865         if (info->attrs[NL80211_ATTR_4ADDR]) {
2866                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2867                 change = true;
2868                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2869                 if (err)
2870                         return err;
2871         } else {
2872                 params.use_4addr = -1;
2873         }
2874
2875         err = nl80211_parse_mon_options(rdev, ntype, info, &params);
2876         if (err < 0)
2877                 return err;
2878         if (err > 0)
2879                 change = true;
2880
2881         if (change)
2882                 err = cfg80211_change_iface(rdev, dev, ntype, &params);
2883         else
2884                 err = 0;
2885
2886         if (!err && params.use_4addr != -1)
2887                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2888
2889         return err;
2890 }
2891
2892 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2893 {
2894         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2895         struct vif_params params;
2896         struct wireless_dev *wdev;
2897         struct sk_buff *msg;
2898         int err;
2899         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2900
2901         /* to avoid failing a new interface creation due to pending removal */
2902         cfg80211_destroy_ifaces(rdev);
2903
2904         memset(&params, 0, sizeof(params));
2905
2906         if (!info->attrs[NL80211_ATTR_IFNAME])
2907                 return -EINVAL;
2908
2909         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2910                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2911                 if (type > NL80211_IFTYPE_MAX)
2912                         return -EINVAL;
2913         }
2914
2915         if (!rdev->ops->add_virtual_intf ||
2916             !(rdev->wiphy.interface_modes & (1 << type)))
2917                 return -EOPNOTSUPP;
2918
2919         if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN ||
2920              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2921             info->attrs[NL80211_ATTR_MAC]) {
2922                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2923                            ETH_ALEN);
2924                 if (!is_valid_ether_addr(params.macaddr))
2925                         return -EADDRNOTAVAIL;
2926         }
2927
2928         if (info->attrs[NL80211_ATTR_4ADDR]) {
2929                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2930                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2931                 if (err)
2932                         return err;
2933         }
2934
2935         err = nl80211_parse_mon_options(rdev, type, info, &params);
2936         if (err < 0)
2937                 return err;
2938
2939         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2940         if (!msg)
2941                 return -ENOMEM;
2942
2943         wdev = rdev_add_virtual_intf(rdev,
2944                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2945                                 NET_NAME_USER, type, &params);
2946         if (WARN_ON(!wdev)) {
2947                 nlmsg_free(msg);
2948                 return -EPROTO;
2949         } else if (IS_ERR(wdev)) {
2950                 nlmsg_free(msg);
2951                 return PTR_ERR(wdev);
2952         }
2953
2954         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2955                 wdev->owner_nlportid = info->snd_portid;
2956
2957         switch (type) {
2958         case NL80211_IFTYPE_MESH_POINT:
2959                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2960                         break;
2961                 wdev_lock(wdev);
2962                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2963                              IEEE80211_MAX_MESH_ID_LEN);
2964                 wdev->mesh_id_up_len =
2965                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2966                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2967                        wdev->mesh_id_up_len);
2968                 wdev_unlock(wdev);
2969                 break;
2970         case NL80211_IFTYPE_NAN:
2971         case NL80211_IFTYPE_P2P_DEVICE:
2972                 /*
2973                  * P2P Device and NAN do not have a netdev, so don't go
2974                  * through the netdev notifier and must be added here
2975                  */
2976                 mutex_init(&wdev->mtx);
2977                 INIT_LIST_HEAD(&wdev->event_list);
2978                 spin_lock_init(&wdev->event_lock);
2979                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2980                 spin_lock_init(&wdev->mgmt_registrations_lock);
2981
2982                 wdev->identifier = ++rdev->wdev_id;
2983                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2984                 rdev->devlist_generation++;
2985                 break;
2986         default:
2987                 break;
2988         }
2989
2990         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2991                                rdev, wdev, false) < 0) {
2992                 nlmsg_free(msg);
2993                 return -ENOBUFS;
2994         }
2995
2996         /*
2997          * For wdevs which have no associated netdev object (e.g. of type
2998          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
2999          * For all other types, the event will be generated from the
3000          * netdev notifier
3001          */
3002         if (!wdev->netdev)
3003                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
3004
3005         return genlmsg_reply(msg, info);
3006 }
3007
3008 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
3009 {
3010         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3011         struct wireless_dev *wdev = info->user_ptr[1];
3012
3013         if (!rdev->ops->del_virtual_intf)
3014                 return -EOPNOTSUPP;
3015
3016         /*
3017          * If we remove a wireless device without a netdev then clear
3018          * user_ptr[1] so that nl80211_post_doit won't dereference it
3019          * to check if it needs to do dev_put(). Otherwise it crashes
3020          * since the wdev has been freed, unlike with a netdev where
3021          * we need the dev_put() for the netdev to really be freed.
3022          */
3023         if (!wdev->netdev)
3024                 info->user_ptr[1] = NULL;
3025
3026         return rdev_del_virtual_intf(rdev, wdev);
3027 }
3028
3029 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
3030 {
3031         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3032         struct net_device *dev = info->user_ptr[1];
3033         u16 noack_map;
3034
3035         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
3036                 return -EINVAL;
3037
3038         if (!rdev->ops->set_noack_map)
3039                 return -EOPNOTSUPP;
3040
3041         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
3042
3043         return rdev_set_noack_map(rdev, dev, noack_map);
3044 }
3045
3046 struct get_key_cookie {
3047         struct sk_buff *msg;
3048         int error;
3049         int idx;
3050 };
3051
3052 static void get_key_callback(void *c, struct key_params *params)
3053 {
3054         struct nlattr *key;
3055         struct get_key_cookie *cookie = c;
3056
3057         if ((params->key &&
3058              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
3059                      params->key_len, params->key)) ||
3060             (params->seq &&
3061              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
3062                      params->seq_len, params->seq)) ||
3063             (params->cipher &&
3064              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
3065                          params->cipher)))
3066                 goto nla_put_failure;
3067
3068         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
3069         if (!key)
3070                 goto nla_put_failure;
3071
3072         if ((params->key &&
3073              nla_put(cookie->msg, NL80211_KEY_DATA,
3074                      params->key_len, params->key)) ||
3075             (params->seq &&
3076              nla_put(cookie->msg, NL80211_KEY_SEQ,
3077                      params->seq_len, params->seq)) ||
3078             (params->cipher &&
3079              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
3080                          params->cipher)))
3081                 goto nla_put_failure;
3082
3083         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
3084                 goto nla_put_failure;
3085
3086         nla_nest_end(cookie->msg, key);
3087
3088         return;
3089  nla_put_failure:
3090         cookie->error = 1;
3091 }
3092
3093 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
3094 {
3095         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3096         int err;
3097         struct net_device *dev = info->user_ptr[1];
3098         u8 key_idx = 0;
3099         const u8 *mac_addr = NULL;
3100         bool pairwise;
3101         struct get_key_cookie cookie = {
3102                 .error = 0,
3103         };
3104         void *hdr;
3105         struct sk_buff *msg;
3106
3107         if (info->attrs[NL80211_ATTR_KEY_IDX])
3108                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
3109
3110         if (key_idx > 5)
3111                 return -EINVAL;
3112
3113         if (info->attrs[NL80211_ATTR_MAC])
3114                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3115
3116         pairwise = !!mac_addr;
3117         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3118                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3119
3120                 if (kt >= NUM_NL80211_KEYTYPES)
3121                         return -EINVAL;
3122                 if (kt != NL80211_KEYTYPE_GROUP &&
3123                     kt != NL80211_KEYTYPE_PAIRWISE)
3124                         return -EINVAL;
3125                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3126         }
3127
3128         if (!rdev->ops->get_key)
3129                 return -EOPNOTSUPP;
3130
3131         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3132                 return -ENOENT;
3133
3134         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3135         if (!msg)
3136                 return -ENOMEM;
3137
3138         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3139                              NL80211_CMD_NEW_KEY);
3140         if (!hdr)
3141                 goto nla_put_failure;
3142
3143         cookie.msg = msg;
3144         cookie.idx = key_idx;
3145
3146         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3147             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3148                 goto nla_put_failure;
3149         if (mac_addr &&
3150             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3151                 goto nla_put_failure;
3152
3153         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3154                            get_key_callback);
3155
3156         if (err)
3157                 goto free_msg;
3158
3159         if (cookie.error)
3160                 goto nla_put_failure;
3161
3162         genlmsg_end(msg, hdr);
3163         return genlmsg_reply(msg, info);
3164
3165  nla_put_failure:
3166         err = -ENOBUFS;
3167  free_msg:
3168         nlmsg_free(msg);
3169         return err;
3170 }
3171
3172 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3173 {
3174         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3175         struct key_parse key;
3176         int err;
3177         struct net_device *dev = info->user_ptr[1];
3178
3179         err = nl80211_parse_key(info, &key);
3180         if (err)
3181                 return err;
3182
3183         if (key.idx < 0)
3184                 return -EINVAL;
3185
3186         /* only support setting default key */
3187         if (!key.def && !key.defmgmt)
3188                 return -EINVAL;
3189
3190         wdev_lock(dev->ieee80211_ptr);
3191
3192         if (key.def) {
3193                 if (!rdev->ops->set_default_key) {
3194                         err = -EOPNOTSUPP;
3195                         goto out;
3196                 }
3197
3198                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3199                 if (err)
3200                         goto out;
3201
3202                 err = rdev_set_default_key(rdev, dev, key.idx,
3203                                                  key.def_uni, key.def_multi);
3204
3205                 if (err)
3206                         goto out;
3207
3208 #ifdef CONFIG_CFG80211_WEXT
3209                 dev->ieee80211_ptr->wext.default_key = key.idx;
3210 #endif
3211         } else {
3212                 if (key.def_uni || !key.def_multi) {
3213                         err = -EINVAL;
3214                         goto out;
3215                 }
3216
3217                 if (!rdev->ops->set_default_mgmt_key) {
3218                         err = -EOPNOTSUPP;
3219                         goto out;
3220                 }
3221
3222                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3223                 if (err)
3224                         goto out;
3225
3226                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3227                 if (err)
3228                         goto out;
3229
3230 #ifdef CONFIG_CFG80211_WEXT
3231                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3232 #endif
3233         }
3234
3235  out:
3236         wdev_unlock(dev->ieee80211_ptr);
3237
3238         return err;
3239 }
3240
3241 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3242 {
3243         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3244         int err;
3245         struct net_device *dev = info->user_ptr[1];
3246         struct key_parse key;
3247         const u8 *mac_addr = NULL;
3248
3249         err = nl80211_parse_key(info, &key);
3250         if (err)
3251                 return err;
3252
3253         if (!key.p.key)
3254                 return -EINVAL;
3255
3256         if (info->attrs[NL80211_ATTR_MAC])
3257                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3258
3259         if (key.type == -1) {
3260                 if (mac_addr)
3261                         key.type = NL80211_KEYTYPE_PAIRWISE;
3262                 else
3263                         key.type = NL80211_KEYTYPE_GROUP;
3264         }
3265
3266         /* for now */
3267         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3268             key.type != NL80211_KEYTYPE_GROUP)
3269                 return -EINVAL;
3270
3271         if (!rdev->ops->add_key)
3272                 return -EOPNOTSUPP;
3273
3274         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3275                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3276                                            mac_addr))
3277                 return -EINVAL;
3278
3279         wdev_lock(dev->ieee80211_ptr);
3280         err = nl80211_key_allowed(dev->ieee80211_ptr);
3281         if (!err)
3282                 err = rdev_add_key(rdev, dev, key.idx,
3283                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3284                                     mac_addr, &key.p);
3285         wdev_unlock(dev->ieee80211_ptr);
3286
3287         return err;
3288 }
3289
3290 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3291 {
3292         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3293         int err;
3294         struct net_device *dev = info->user_ptr[1];
3295         u8 *mac_addr = NULL;
3296         struct key_parse key;
3297
3298         err = nl80211_parse_key(info, &key);
3299         if (err)
3300                 return err;
3301
3302         if (info->attrs[NL80211_ATTR_MAC])
3303                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3304
3305         if (key.type == -1) {
3306                 if (mac_addr)
3307                         key.type = NL80211_KEYTYPE_PAIRWISE;
3308                 else
3309                         key.type = NL80211_KEYTYPE_GROUP;
3310         }
3311
3312         /* for now */
3313         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3314             key.type != NL80211_KEYTYPE_GROUP)
3315                 return -EINVAL;
3316
3317         if (!rdev->ops->del_key)
3318                 return -EOPNOTSUPP;
3319
3320         wdev_lock(dev->ieee80211_ptr);
3321         err = nl80211_key_allowed(dev->ieee80211_ptr);
3322
3323         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3324             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3325                 err = -ENOENT;
3326
3327         if (!err)
3328                 err = rdev_del_key(rdev, dev, key.idx,
3329                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3330                                    mac_addr);
3331
3332 #ifdef CONFIG_CFG80211_WEXT
3333         if (!err) {
3334                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3335                         dev->ieee80211_ptr->wext.default_key = -1;
3336                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3337                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3338         }
3339 #endif
3340         wdev_unlock(dev->ieee80211_ptr);
3341
3342         return err;
3343 }
3344
3345 /* This function returns an error or the number of nested attributes */
3346 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3347 {
3348         struct nlattr *attr;
3349         int n_entries = 0, tmp;
3350
3351         nla_for_each_nested(attr, nl_attr, tmp) {
3352                 if (nla_len(attr) != ETH_ALEN)
3353                         return -EINVAL;
3354
3355                 n_entries++;
3356         }
3357
3358         return n_entries;
3359 }
3360
3361 /*
3362  * This function parses ACL information and allocates memory for ACL data.
3363  * On successful return, the calling function is responsible to free the
3364  * ACL buffer returned by this function.
3365  */
3366 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3367                                                 struct genl_info *info)
3368 {
3369         enum nl80211_acl_policy acl_policy;
3370         struct nlattr *attr;
3371         struct cfg80211_acl_data *acl;
3372         int i = 0, n_entries, tmp;
3373
3374         if (!wiphy->max_acl_mac_addrs)
3375                 return ERR_PTR(-EOPNOTSUPP);
3376
3377         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3378                 return ERR_PTR(-EINVAL);
3379
3380         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3381         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3382             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3383                 return ERR_PTR(-EINVAL);
3384
3385         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3386                 return ERR_PTR(-EINVAL);
3387
3388         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3389         if (n_entries < 0)
3390                 return ERR_PTR(n_entries);
3391
3392         if (n_entries > wiphy->max_acl_mac_addrs)
3393                 return ERR_PTR(-ENOTSUPP);
3394
3395         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3396                       GFP_KERNEL);
3397         if (!acl)
3398                 return ERR_PTR(-ENOMEM);
3399
3400         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3401                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3402                 i++;
3403         }
3404
3405         acl->n_acl_entries = n_entries;
3406         acl->acl_policy = acl_policy;
3407
3408         return acl;
3409 }
3410
3411 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3412 {
3413         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3414         struct net_device *dev = info->user_ptr[1];
3415         struct cfg80211_acl_data *acl;
3416         int err;
3417
3418         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3419             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3420                 return -EOPNOTSUPP;
3421
3422         if (!dev->ieee80211_ptr->beacon_interval)
3423                 return -EINVAL;
3424
3425         acl = parse_acl_data(&rdev->wiphy, info);
3426         if (IS_ERR(acl))
3427                 return PTR_ERR(acl);
3428
3429         err = rdev_set_mac_acl(rdev, dev, acl);
3430
3431         kfree(acl);
3432
3433         return err;
3434 }
3435
3436 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
3437                            u8 *rates, u8 rates_len)
3438 {
3439         u8 i;
3440         u32 mask = 0;
3441
3442         for (i = 0; i < rates_len; i++) {
3443                 int rate = (rates[i] & 0x7f) * 5;
3444                 int ridx;
3445
3446                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
3447                         struct ieee80211_rate *srate =
3448                                 &sband->bitrates[ridx];
3449                         if (rate == srate->bitrate) {
3450                                 mask |= 1 << ridx;
3451                                 break;
3452                         }
3453                 }
3454                 if (ridx == sband->n_bitrates)
3455                         return 0; /* rate not found */
3456         }
3457
3458         return mask;
3459 }
3460
3461 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
3462                                u8 *rates, u8 rates_len,
3463                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
3464 {
3465         u8 i;
3466
3467         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
3468
3469         for (i = 0; i < rates_len; i++) {
3470                 int ridx, rbit;
3471
3472                 ridx = rates[i] / 8;
3473                 rbit = BIT(rates[i] % 8);
3474
3475                 /* check validity */
3476                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
3477                         return false;
3478
3479                 /* check availability */
3480                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
3481                         mcs[ridx] |= rbit;
3482                 else
3483                         return false;
3484         }
3485
3486         return true;
3487 }
3488
3489 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
3490 {
3491         u16 mcs_mask = 0;
3492
3493         switch (vht_mcs_map) {
3494         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
3495                 break;
3496         case IEEE80211_VHT_MCS_SUPPORT_0_7:
3497                 mcs_mask = 0x00FF;
3498                 break;
3499         case IEEE80211_VHT_MCS_SUPPORT_0_8:
3500                 mcs_mask = 0x01FF;
3501                 break;
3502         case IEEE80211_VHT_MCS_SUPPORT_0_9:
3503                 mcs_mask = 0x03FF;
3504                 break;
3505         default:
3506                 break;
3507         }
3508
3509         return mcs_mask;
3510 }
3511
3512 static void vht_build_mcs_mask(u16 vht_mcs_map,
3513                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
3514 {
3515         u8 nss;
3516
3517         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
3518                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
3519                 vht_mcs_map >>= 2;
3520         }
3521 }
3522
3523 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
3524                              struct nl80211_txrate_vht *txrate,
3525                              u16 mcs[NL80211_VHT_NSS_MAX])
3526 {
3527         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3528         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
3529         u8 i;
3530
3531         if (!sband->vht_cap.vht_supported)
3532                 return false;
3533
3534         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
3535
3536         /* Build vht_mcs_mask from VHT capabilities */
3537         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
3538
3539         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3540                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
3541                         mcs[i] = txrate->mcs[i];
3542                 else
3543                         return false;
3544         }
3545
3546         return true;
3547 }
3548
3549 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
3550         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
3551                                     .len = NL80211_MAX_SUPP_RATES },
3552         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
3553                                 .len = NL80211_MAX_SUPP_HT_RATES },
3554         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
3555         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
3556 };
3557
3558 static int nl80211_parse_tx_bitrate_mask(struct genl_info *info,
3559                                          struct cfg80211_bitrate_mask *mask)
3560 {
3561         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
3562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3563         int rem, i;
3564         struct nlattr *tx_rates;
3565         struct ieee80211_supported_band *sband;
3566         u16 vht_tx_mcs_map;
3567
3568         memset(mask, 0, sizeof(*mask));
3569         /* Default to all rates enabled */
3570         for (i = 0; i < NUM_NL80211_BANDS; i++) {
3571                 sband = rdev->wiphy.bands[i];
3572
3573                 if (!sband)
3574                         continue;
3575
3576                 mask->control[i].legacy = (1 << sband->n_bitrates) - 1;
3577                 memcpy(mask->control[i].ht_mcs,
3578                        sband->ht_cap.mcs.rx_mask,
3579                        sizeof(mask->control[i].ht_mcs));
3580
3581                 if (!sband->vht_cap.vht_supported)
3582                         continue;
3583
3584                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3585                 vht_build_mcs_mask(vht_tx_mcs_map, mask->control[i].vht_mcs);
3586         }
3587
3588         /* if no rates are given set it back to the defaults */
3589         if (!info->attrs[NL80211_ATTR_TX_RATES])
3590                 goto out;
3591
3592         /* The nested attribute uses enum nl80211_band as the index. This maps
3593          * directly to the enum nl80211_band values used in cfg80211.
3594          */
3595         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
3596         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
3597                 enum nl80211_band band = nla_type(tx_rates);
3598                 int err;
3599
3600                 if (band < 0 || band >= NUM_NL80211_BANDS)
3601                         return -EINVAL;
3602                 sband = rdev->wiphy.bands[band];
3603                 if (sband == NULL)
3604                         return -EINVAL;
3605                 err = nla_parse_nested(tb, NL80211_TXRATE_MAX, tx_rates,
3606                                        nl80211_txattr_policy, info->extack);
3607                 if (err)
3608                         return err;
3609                 if (tb[NL80211_TXRATE_LEGACY]) {
3610                         mask->control[band].legacy = rateset_to_mask(
3611                                 sband,
3612                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
3613                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
3614                         if ((mask->control[band].legacy == 0) &&
3615                             nla_len(tb[NL80211_TXRATE_LEGACY]))
3616                                 return -EINVAL;
3617                 }
3618                 if (tb[NL80211_TXRATE_HT]) {
3619                         if (!ht_rateset_to_mask(
3620                                         sband,
3621                                         nla_data(tb[NL80211_TXRATE_HT]),
3622                                         nla_len(tb[NL80211_TXRATE_HT]),
3623                                         mask->control[band].ht_mcs))
3624                                 return -EINVAL;
3625                 }
3626                 if (tb[NL80211_TXRATE_VHT]) {
3627                         if (!vht_set_mcs_mask(
3628                                         sband,
3629                                         nla_data(tb[NL80211_TXRATE_VHT]),
3630                                         mask->control[band].vht_mcs))
3631                                 return -EINVAL;
3632                 }
3633                 if (tb[NL80211_TXRATE_GI]) {
3634                         mask->control[band].gi =
3635                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
3636                         if (mask->control[band].gi > NL80211_TXRATE_FORCE_LGI)
3637                                 return -EINVAL;
3638                 }
3639
3640                 if (mask->control[band].legacy == 0) {
3641                         /* don't allow empty legacy rates if HT or VHT
3642                          * are not even supported.
3643                          */
3644                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
3645                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
3646                                 return -EINVAL;
3647
3648                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
3649                                 if (mask->control[band].ht_mcs[i])
3650                                         goto out;
3651
3652                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
3653                                 if (mask->control[band].vht_mcs[i])
3654                                         goto out;
3655
3656                         /* legacy and mcs rates may not be both empty */
3657                         return -EINVAL;
3658                 }
3659         }
3660
3661 out:
3662         return 0;
3663 }
3664
3665 static int validate_beacon_tx_rate(struct cfg80211_registered_device *rdev,
3666                                    enum nl80211_band band,
3667                                    struct cfg80211_bitrate_mask *beacon_rate)
3668 {
3669         u32 count_ht, count_vht, i;
3670         u32 rate = beacon_rate->control[band].legacy;
3671
3672         /* Allow only one rate */
3673         if (hweight32(rate) > 1)
3674                 return -EINVAL;
3675
3676         count_ht = 0;
3677         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
3678                 if (hweight8(beacon_rate->control[band].ht_mcs[i]) > 1) {
3679                         return -EINVAL;
3680                 } else if (beacon_rate->control[band].ht_mcs[i]) {
3681                         count_ht++;
3682                         if (count_ht > 1)
3683                                 return -EINVAL;
3684                 }
3685                 if (count_ht && rate)
3686                         return -EINVAL;
3687         }
3688
3689         count_vht = 0;
3690         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3691                 if (hweight16(beacon_rate->control[band].vht_mcs[i]) > 1) {
3692                         return -EINVAL;
3693                 } else if (beacon_rate->control[band].vht_mcs[i]) {
3694                         count_vht++;
3695                         if (count_vht > 1)
3696                                 return -EINVAL;
3697                 }
3698                 if (count_vht && rate)
3699                         return -EINVAL;
3700         }
3701
3702         if ((count_ht && count_vht) || (!rate && !count_ht && !count_vht))
3703                 return -EINVAL;
3704
3705         if (rate &&
3706             !wiphy_ext_feature_isset(&rdev->wiphy,
3707                                      NL80211_EXT_FEATURE_BEACON_RATE_LEGACY))
3708                 return -EINVAL;
3709         if (count_ht &&
3710             !wiphy_ext_feature_isset(&rdev->wiphy,
3711                                      NL80211_EXT_FEATURE_BEACON_RATE_HT))
3712                 return -EINVAL;
3713         if (count_vht &&
3714             !wiphy_ext_feature_isset(&rdev->wiphy,
3715                                      NL80211_EXT_FEATURE_BEACON_RATE_VHT))
3716                 return -EINVAL;
3717
3718         return 0;
3719 }
3720
3721 static int nl80211_parse_beacon(struct nlattr *attrs[],
3722                                 struct cfg80211_beacon_data *bcn)
3723 {
3724         bool haveinfo = false;
3725
3726         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3727             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3728             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3729             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3730                 return -EINVAL;
3731
3732         memset(bcn, 0, sizeof(*bcn));
3733
3734         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3735                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3736                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3737                 if (!bcn->head_len)
3738                         return -EINVAL;
3739                 haveinfo = true;
3740         }
3741
3742         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3743                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3744                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3745                 haveinfo = true;
3746         }
3747
3748         if (!haveinfo)
3749                 return -EINVAL;
3750
3751         if (attrs[NL80211_ATTR_IE]) {
3752                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3753                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3754         }
3755
3756         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3757                 bcn->proberesp_ies =
3758                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3759                 bcn->proberesp_ies_len =
3760                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3761         }
3762
3763         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3764                 bcn->assocresp_ies =
3765                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3766                 bcn->assocresp_ies_len =
3767                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3768         }
3769
3770         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3771                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3772                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3773         }
3774
3775         return 0;
3776 }
3777
3778 static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params,
3779                                             const u8 *rates)
3780 {
3781         int i;
3782
3783         if (!rates)
3784                 return;
3785
3786         for (i = 0; i < rates[1]; i++) {
3787                 if (rates[2 + i] == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
3788                         params->ht_required = true;
3789                 if (rates[2 + i] == BSS_MEMBERSHIP_SELECTOR_VHT_PHY)
3790                         params->vht_required = true;
3791         }
3792 }
3793
3794 /*
3795  * Since the nl80211 API didn't include, from the beginning, attributes about
3796  * HT/VHT requirements/capabilities, we parse them out of the IEs for the
3797  * benefit of drivers that rebuild IEs in the firmware.
3798  */
3799 static void nl80211_calculate_ap_params(struct cfg80211_ap_settings *params)
3800 {
3801         const struct cfg80211_beacon_data *bcn = &params->beacon;
3802         size_t ies_len = bcn->tail_len;
3803         const u8 *ies = bcn->tail;
3804         const u8 *rates;
3805         const u8 *cap;
3806
3807         rates = cfg80211_find_ie(WLAN_EID_SUPP_RATES, ies, ies_len);
3808         nl80211_check_ap_rate_selectors(params, rates);
3809
3810         rates = cfg80211_find_ie(WLAN_EID_EXT_SUPP_RATES, ies, ies_len);
3811         nl80211_check_ap_rate_selectors(params, rates);
3812
3813         cap = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
3814         if (cap && cap[1] >= sizeof(*params->ht_cap))
3815                 params->ht_cap = (void *)(cap + 2);
3816         cap = cfg80211_find_ie(WLAN_EID_VHT_CAPABILITY, ies, ies_len);
3817         if (cap && cap[1] >= sizeof(*params->vht_cap))
3818                 params->vht_cap = (void *)(cap + 2);
3819 }
3820
3821 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3822                                    struct cfg80211_ap_settings *params)
3823 {
3824         struct wireless_dev *wdev;
3825         bool ret = false;
3826
3827         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3828                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3829                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3830                         continue;
3831
3832                 if (!wdev->preset_chandef.chan)
3833                         continue;
3834
3835                 params->chandef = wdev->preset_chandef;
3836                 ret = true;
3837                 break;
3838         }
3839
3840         return ret;
3841 }
3842
3843 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3844                                     enum nl80211_auth_type auth_type,
3845                                     enum nl80211_commands cmd)
3846 {
3847         if (auth_type > NL80211_AUTHTYPE_MAX)
3848                 return false;
3849
3850         switch (cmd) {
3851         case NL80211_CMD_AUTHENTICATE:
3852                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3853                     auth_type == NL80211_AUTHTYPE_SAE)
3854                         return false;
3855                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
3856                                              NL80211_EXT_FEATURE_FILS_STA) &&
3857                     (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3858                      auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3859                      auth_type == NL80211_AUTHTYPE_FILS_PK))
3860                         return false;
3861                 return true;
3862         case NL80211_CMD_CONNECT:
3863                 /* SAE not supported yet */
3864                 if (auth_type == NL80211_AUTHTYPE_SAE)
3865                         return false;
3866                 /* FILS with SK PFS or PK not supported yet */
3867                 if (auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3868                     auth_type == NL80211_AUTHTYPE_FILS_PK)
3869                         return false;
3870                 if (!wiphy_ext_feature_isset(
3871                             &rdev->wiphy,
3872                             NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
3873                     auth_type == NL80211_AUTHTYPE_FILS_SK)
3874                         return false;
3875                 return true;
3876         case NL80211_CMD_START_AP:
3877                 /* SAE not supported yet */
3878                 if (auth_type == NL80211_AUTHTYPE_SAE)
3879                         return false;
3880                 /* FILS not supported yet */
3881                 if (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3882                     auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3883                     auth_type == NL80211_AUTHTYPE_FILS_PK)
3884                         return false;
3885                 return true;
3886         default:
3887                 return false;
3888         }
3889 }
3890
3891 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3892 {
3893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3894         struct net_device *dev = info->user_ptr[1];
3895         struct wireless_dev *wdev = dev->ieee80211_ptr;
3896         struct cfg80211_ap_settings params;
3897         int err;
3898
3899         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3900             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3901                 return -EOPNOTSUPP;
3902
3903         if (!rdev->ops->start_ap)
3904                 return -EOPNOTSUPP;
3905
3906         if (wdev->beacon_interval)
3907                 return -EALREADY;
3908
3909         memset(&params, 0, sizeof(params));
3910
3911         /* these are required for START_AP */
3912         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3913             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3914             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3915                 return -EINVAL;
3916
3917         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3918         if (err)
3919                 return err;
3920
3921         params.beacon_interval =
3922                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3923         params.dtim_period =
3924                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3925
3926         err = cfg80211_validate_beacon_int(rdev, dev->ieee80211_ptr->iftype,
3927                                            params.beacon_interval);
3928         if (err)
3929                 return err;
3930
3931         /*
3932          * In theory, some of these attributes should be required here
3933          * but since they were not used when the command was originally
3934          * added, keep them optional for old user space programs to let
3935          * them continue to work with drivers that do not need the
3936          * additional information -- drivers must check!
3937          */
3938         if (info->attrs[NL80211_ATTR_SSID]) {
3939                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3940                 params.ssid_len =
3941                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3942                 if (params.ssid_len == 0 ||
3943                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3944                         return -EINVAL;
3945         }
3946
3947         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3948                 params.hidden_ssid = nla_get_u32(
3949                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3950                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3951                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3952                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3953                         return -EINVAL;
3954         }
3955
3956         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3957
3958         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3959                 params.auth_type = nla_get_u32(
3960                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3961                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3962                                              NL80211_CMD_START_AP))
3963                         return -EINVAL;
3964         } else
3965                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3966
3967         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3968                                       NL80211_MAX_NR_CIPHER_SUITES);
3969         if (err)
3970                 return err;
3971
3972         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3973                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3974                         return -EOPNOTSUPP;
3975                 params.inactivity_timeout = nla_get_u16(
3976                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3977         }
3978
3979         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3980                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3981                         return -EINVAL;
3982                 params.p2p_ctwindow =
3983                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3984                 if (params.p2p_ctwindow > 127)
3985                         return -EINVAL;
3986                 if (params.p2p_ctwindow != 0 &&
3987                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3988                         return -EINVAL;
3989         }
3990
3991         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3992                 u8 tmp;
3993
3994                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3995                         return -EINVAL;
3996                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3997                 if (tmp > 1)
3998                         return -EINVAL;
3999                 params.p2p_opp_ps = tmp;
4000                 if (params.p2p_opp_ps != 0 &&
4001                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4002                         return -EINVAL;
4003         }
4004
4005         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4006                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
4007                 if (err)
4008                         return err;
4009         } else if (wdev->preset_chandef.chan) {
4010                 params.chandef = wdev->preset_chandef;
4011         } else if (!nl80211_get_ap_channel(rdev, &params))
4012                 return -EINVAL;
4013
4014         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
4015                                            wdev->iftype))
4016                 return -EINVAL;
4017
4018         if (info->attrs[NL80211_ATTR_TX_RATES]) {
4019                 err = nl80211_parse_tx_bitrate_mask(info, &params.beacon_rate);
4020                 if (err)
4021                         return err;
4022
4023                 err = validate_beacon_tx_rate(rdev, params.chandef.chan->band,
4024                                               &params.beacon_rate);
4025                 if (err)
4026                         return err;
4027         }
4028
4029         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
4030                 params.smps_mode =
4031                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
4032                 switch (params.smps_mode) {
4033                 case NL80211_SMPS_OFF:
4034                         break;
4035                 case NL80211_SMPS_STATIC:
4036                         if (!(rdev->wiphy.features &
4037                               NL80211_FEATURE_STATIC_SMPS))
4038                                 return -EINVAL;
4039                         break;
4040                 case NL80211_SMPS_DYNAMIC:
4041                         if (!(rdev->wiphy.features &
4042                               NL80211_FEATURE_DYNAMIC_SMPS))
4043                                 return -EINVAL;
4044                         break;
4045                 default:
4046                         return -EINVAL;
4047                 }
4048         } else {
4049                 params.smps_mode = NL80211_SMPS_OFF;
4050         }
4051
4052         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
4053         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
4054                 return -EOPNOTSUPP;
4055
4056         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
4057                 params.acl = parse_acl_data(&rdev->wiphy, info);
4058                 if (IS_ERR(params.acl))
4059                         return PTR_ERR(params.acl);
4060         }
4061
4062         nl80211_calculate_ap_params(&params);
4063
4064         wdev_lock(wdev);
4065         err = rdev_start_ap(rdev, dev, &params);
4066         if (!err) {
4067                 wdev->preset_chandef = params.chandef;
4068                 wdev->beacon_interval = params.beacon_interval;
4069                 wdev->chandef = params.chandef;
4070                 wdev->ssid_len = params.ssid_len;
4071                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
4072         }
4073         wdev_unlock(wdev);
4074
4075         kfree(params.acl);
4076
4077         return err;
4078 }
4079
4080 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
4081 {
4082         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4083         struct net_device *dev = info->user_ptr[1];
4084         struct wireless_dev *wdev = dev->ieee80211_ptr;
4085         struct cfg80211_beacon_data params;
4086         int err;
4087
4088         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4089             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4090                 return -EOPNOTSUPP;
4091
4092         if (!rdev->ops->change_beacon)
4093                 return -EOPNOTSUPP;
4094
4095         if (!wdev->beacon_interval)
4096                 return -EINVAL;
4097
4098         err = nl80211_parse_beacon(info->attrs, &params);
4099         if (err)
4100                 return err;
4101
4102         wdev_lock(wdev);
4103         err = rdev_change_beacon(rdev, dev, &params);
4104         wdev_unlock(wdev);
4105
4106         return err;
4107 }
4108
4109 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
4110 {
4111         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4112         struct net_device *dev = info->user_ptr[1];
4113
4114         return cfg80211_stop_ap(rdev, dev, false);
4115 }
4116
4117 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
4118         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
4119         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
4120         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
4121         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
4122         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
4123         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
4124 };
4125
4126 static int parse_station_flags(struct genl_info *info,
4127                                enum nl80211_iftype iftype,
4128                                struct station_parameters *params)
4129 {
4130         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
4131         struct nlattr *nla;
4132         int flag;
4133
4134         /*
4135          * Try parsing the new attribute first so userspace
4136          * can specify both for older kernels.
4137          */
4138         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
4139         if (nla) {
4140                 struct nl80211_sta_flag_update *sta_flags;
4141
4142                 sta_flags = nla_data(nla);
4143                 params->sta_flags_mask = sta_flags->mask;
4144                 params->sta_flags_set = sta_flags->set;
4145                 params->sta_flags_set &= params->sta_flags_mask;
4146                 if ((params->sta_flags_mask |
4147                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
4148                         return -EINVAL;
4149                 return 0;
4150         }
4151
4152         /* if present, parse the old attribute */
4153
4154         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
4155         if (!nla)
4156                 return 0;
4157
4158         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX, nla,
4159                              sta_flags_policy, info->extack))
4160                 return -EINVAL;
4161
4162         /*
4163          * Only allow certain flags for interface types so that
4164          * other attributes are silently ignored. Remember that
4165          * this is backward compatibility code with old userspace
4166          * and shouldn't be hit in other cases anyway.
4167          */
4168         switch (iftype) {
4169         case NL80211_IFTYPE_AP:
4170         case NL80211_IFTYPE_AP_VLAN:
4171         case NL80211_IFTYPE_P2P_GO:
4172                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4173                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4174                                          BIT(NL80211_STA_FLAG_WME) |
4175                                          BIT(NL80211_STA_FLAG_MFP);
4176                 break;
4177         case NL80211_IFTYPE_P2P_CLIENT:
4178         case NL80211_IFTYPE_STATION:
4179                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4180                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
4181                 break;
4182         case NL80211_IFTYPE_MESH_POINT:
4183                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4184                                          BIT(NL80211_STA_FLAG_MFP) |
4185                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
4186         default:
4187                 return -EINVAL;
4188         }
4189
4190         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
4191                 if (flags[flag]) {
4192                         params->sta_flags_set |= (1<<flag);
4193
4194                         /* no longer support new API additions in old API */
4195                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
4196                                 return -EINVAL;
4197                 }
4198         }
4199
4200         return 0;
4201 }
4202
4203 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
4204                                  int attr)
4205 {
4206         struct nlattr *rate;
4207         u32 bitrate;
4208         u16 bitrate_compat;
4209         enum nl80211_rate_info rate_flg;
4210
4211         rate = nla_nest_start(msg, attr);
4212         if (!rate)
4213                 return false;
4214
4215         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
4216         bitrate = cfg80211_calculate_bitrate(info);
4217         /* report 16-bit bitrate only if we can */
4218         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
4219         if (bitrate > 0 &&
4220             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
4221                 return false;
4222         if (bitrate_compat > 0 &&
4223             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
4224                 return false;
4225
4226         switch (info->bw) {
4227         case RATE_INFO_BW_5:
4228                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
4229                 break;
4230         case RATE_INFO_BW_10:
4231                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
4232                 break;
4233         default:
4234                 WARN_ON(1);
4235                 /* fall through */
4236         case RATE_INFO_BW_20:
4237                 rate_flg = 0;
4238                 break;
4239         case RATE_INFO_BW_40:
4240                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
4241                 break;
4242         case RATE_INFO_BW_80:
4243                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
4244                 break;
4245         case RATE_INFO_BW_160:
4246                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
4247                 break;
4248         }
4249
4250         if (rate_flg && nla_put_flag(msg, rate_flg))
4251                 return false;
4252
4253         if (info->flags & RATE_INFO_FLAGS_MCS) {
4254                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
4255                         return false;
4256                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4257                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4258                         return false;
4259         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
4260                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
4261                         return false;
4262                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
4263                         return false;
4264                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4265                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4266                         return false;
4267         }
4268
4269         nla_nest_end(msg, rate);
4270         return true;
4271 }
4272
4273 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
4274                                int id)
4275 {
4276         void *attr;
4277         int i = 0;
4278
4279         if (!mask)
4280                 return true;
4281
4282         attr = nla_nest_start(msg, id);
4283         if (!attr)
4284                 return false;
4285
4286         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
4287                 if (!(mask & BIT(i)))
4288                         continue;
4289
4290                 if (nla_put_u8(msg, i, signal[i]))
4291                         return false;
4292         }
4293
4294         nla_nest_end(msg, attr);
4295
4296         return true;
4297 }
4298
4299 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
4300                                 u32 seq, int flags,
4301                                 struct cfg80211_registered_device *rdev,
4302                                 struct net_device *dev,
4303                                 const u8 *mac_addr, struct station_info *sinfo)
4304 {
4305         void *hdr;
4306         struct nlattr *sinfoattr, *bss_param;
4307
4308         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
4309         if (!hdr)
4310                 return -1;
4311
4312         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4313             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
4314             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
4315                 goto nla_put_failure;
4316
4317         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
4318         if (!sinfoattr)
4319                 goto nla_put_failure;
4320
4321 #define PUT_SINFO(attr, memb, type) do {                                \
4322         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
4323         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4324             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
4325                              sinfo->memb))                              \
4326                 goto nla_put_failure;                                   \
4327         } while (0)
4328 #define PUT_SINFO_U64(attr, memb) do {                                  \
4329         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4330             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
4331                               sinfo->memb, NL80211_STA_INFO_PAD))       \
4332                 goto nla_put_failure;                                   \
4333         } while (0)
4334
4335         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
4336         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
4337
4338         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
4339                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
4340             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
4341                         (u32)sinfo->rx_bytes))
4342                 goto nla_put_failure;
4343
4344         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
4345                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
4346             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
4347                         (u32)sinfo->tx_bytes))
4348                 goto nla_put_failure;
4349
4350         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
4351         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
4352         PUT_SINFO(LLID, llid, u16);
4353         PUT_SINFO(PLID, plid, u16);
4354         PUT_SINFO(PLINK_STATE, plink_state, u8);
4355         PUT_SINFO_U64(RX_DURATION, rx_duration);
4356
4357         switch (rdev->wiphy.signal_type) {
4358         case CFG80211_SIGNAL_TYPE_MBM:
4359                 PUT_SINFO(SIGNAL, signal, u8);
4360                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
4361                 break;
4362         default:
4363                 break;
4364         }
4365         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
4366                 if (!nl80211_put_signal(msg, sinfo->chains,
4367                                         sinfo->chain_signal,
4368                                         NL80211_STA_INFO_CHAIN_SIGNAL))
4369                         goto nla_put_failure;
4370         }
4371         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
4372                 if (!nl80211_put_signal(msg, sinfo->chains,
4373                                         sinfo->chain_signal_avg,
4374                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
4375                         goto nla_put_failure;
4376         }
4377         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
4378                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
4379                                           NL80211_STA_INFO_TX_BITRATE))
4380                         goto nla_put_failure;
4381         }
4382         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
4383                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
4384                                           NL80211_STA_INFO_RX_BITRATE))
4385                         goto nla_put_failure;
4386         }
4387
4388         PUT_SINFO(RX_PACKETS, rx_packets, u32);
4389         PUT_SINFO(TX_PACKETS, tx_packets, u32);
4390         PUT_SINFO(TX_RETRIES, tx_retries, u32);
4391         PUT_SINFO(TX_FAILED, tx_failed, u32);
4392         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
4393         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
4394         PUT_SINFO(LOCAL_PM, local_pm, u32);
4395         PUT_SINFO(PEER_PM, peer_pm, u32);
4396         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
4397
4398         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
4399                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
4400                 if (!bss_param)
4401                         goto nla_put_failure;
4402
4403                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
4404                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
4405                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
4406                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
4407                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
4408                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
4409                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
4410                                sinfo->bss_param.dtim_period) ||
4411                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
4412                                 sinfo->bss_param.beacon_interval))
4413                         goto nla_put_failure;
4414
4415                 nla_nest_end(msg, bss_param);
4416         }
4417         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
4418             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
4419                     sizeof(struct nl80211_sta_flag_update),
4420                     &sinfo->sta_flags))
4421                 goto nla_put_failure;
4422
4423         PUT_SINFO_U64(T_OFFSET, t_offset);
4424         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
4425         PUT_SINFO_U64(BEACON_RX, rx_beacon);
4426         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
4427
4428 #undef PUT_SINFO
4429 #undef PUT_SINFO_U64
4430
4431         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
4432                 struct nlattr *tidsattr;
4433                 int tid;
4434
4435                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
4436                 if (!tidsattr)
4437                         goto nla_put_failure;
4438
4439                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
4440                         struct cfg80211_tid_stats *tidstats;
4441                         struct nlattr *tidattr;
4442
4443                         tidstats = &sinfo->pertid[tid];
4444
4445                         if (!tidstats->filled)
4446                                 continue;
4447
4448                         tidattr = nla_nest_start(msg, tid + 1);
4449                         if (!tidattr)
4450                                 goto nla_put_failure;
4451
4452 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
4453         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
4454             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
4455                               tidstats->memb, NL80211_TID_STATS_PAD))   \
4456                 goto nla_put_failure;                                   \
4457         } while (0)
4458
4459                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
4460                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
4461                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
4462                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
4463
4464 #undef PUT_TIDVAL_U64
4465                         nla_nest_end(msg, tidattr);
4466                 }
4467
4468                 nla_nest_end(msg, tidsattr);
4469         }
4470
4471         nla_nest_end(msg, sinfoattr);
4472
4473         if (sinfo->assoc_req_ies_len &&
4474             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
4475                     sinfo->assoc_req_ies))
4476                 goto nla_put_failure;
4477
4478         genlmsg_end(msg, hdr);
4479         return 0;
4480
4481  nla_put_failure:
4482         genlmsg_cancel(msg, hdr);
4483         return -EMSGSIZE;
4484 }
4485
4486 static int nl80211_dump_station(struct sk_buff *skb,
4487                                 struct netlink_callback *cb)
4488 {
4489         struct station_info sinfo;
4490         struct cfg80211_registered_device *rdev;
4491         struct wireless_dev *wdev;
4492         u8 mac_addr[ETH_ALEN];
4493         int sta_idx = cb->args[2];
4494         int err;
4495
4496         rtnl_lock();
4497         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4498         if (err)
4499                 goto out_err;
4500
4501         if (!wdev->netdev) {
4502                 err = -EINVAL;
4503                 goto out_err;
4504         }
4505
4506         if (!rdev->ops->dump_station) {
4507                 err = -EOPNOTSUPP;
4508                 goto out_err;
4509         }
4510
4511         while (1) {
4512                 memset(&sinfo, 0, sizeof(sinfo));
4513                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4514                                         mac_addr, &sinfo);
4515                 if (err == -ENOENT)
4516                         break;
4517                 if (err)
4518                         goto out_err;
4519
4520                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4521                                 NETLINK_CB(cb->skb).portid,
4522                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4523                                 rdev, wdev->netdev, mac_addr,
4524                                 &sinfo) < 0)
4525                         goto out;
4526
4527                 sta_idx++;
4528         }
4529
4530  out:
4531         cb->args[2] = sta_idx;
4532         err = skb->len;
4533  out_err:
4534         rtnl_unlock();
4535
4536         return err;
4537 }
4538
4539 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4540 {
4541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4542         struct net_device *dev = info->user_ptr[1];
4543         struct station_info sinfo;
4544         struct sk_buff *msg;
4545         u8 *mac_addr = NULL;
4546         int err;
4547
4548         memset(&sinfo, 0, sizeof(sinfo));
4549
4550         if (!info->attrs[NL80211_ATTR_MAC])
4551                 return -EINVAL;
4552
4553         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4554
4555         if (!rdev->ops->get_station)
4556                 return -EOPNOTSUPP;
4557
4558         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4559         if (err)
4560                 return err;
4561
4562         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4563         if (!msg)
4564                 return -ENOMEM;
4565
4566         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4567                                  info->snd_portid, info->snd_seq, 0,
4568                                  rdev, dev, mac_addr, &sinfo) < 0) {
4569                 nlmsg_free(msg);
4570                 return -ENOBUFS;
4571         }
4572
4573         return genlmsg_reply(msg, info);
4574 }
4575
4576 int cfg80211_check_station_change(struct wiphy *wiphy,
4577                                   struct station_parameters *params,
4578                                   enum cfg80211_station_type statype)
4579 {
4580         if (params->listen_interval != -1 &&
4581             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4582                 return -EINVAL;
4583
4584         if (params->support_p2p_ps != -1 &&
4585             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4586                 return -EINVAL;
4587
4588         if (params->aid &&
4589             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4590             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4591                 return -EINVAL;
4592
4593         /* When you run into this, adjust the code below for the new flag */
4594         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4595
4596         switch (statype) {
4597         case CFG80211_STA_MESH_PEER_KERNEL:
4598         case CFG80211_STA_MESH_PEER_USER:
4599                 /*
4600                  * No ignoring the TDLS flag here -- the userspace mesh
4601                  * code doesn't have the bug of including TDLS in the
4602                  * mask everywhere.
4603                  */
4604                 if (params->sta_flags_mask &
4605                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4606                                   BIT(NL80211_STA_FLAG_MFP) |
4607                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4608                         return -EINVAL;
4609                 break;
4610         case CFG80211_STA_TDLS_PEER_SETUP:
4611         case CFG80211_STA_TDLS_PEER_ACTIVE:
4612                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4613                         return -EINVAL;
4614                 /* ignore since it can't change */
4615                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4616                 break;
4617         default:
4618                 /* disallow mesh-specific things */
4619                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4620                         return -EINVAL;
4621                 if (params->local_pm)
4622                         return -EINVAL;
4623                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4624                         return -EINVAL;
4625         }
4626
4627         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4628             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4629                 /* TDLS can't be set, ... */
4630                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4631                         return -EINVAL;
4632                 /*
4633                  * ... but don't bother the driver with it. This works around
4634                  * a hostapd/wpa_supplicant issue -- it always includes the
4635                  * TLDS_PEER flag in the mask even for AP mode.
4636                  */
4637                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4638         }
4639
4640         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4641             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4642                 /* reject other things that can't change */
4643                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4644                         return -EINVAL;
4645                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4646                         return -EINVAL;
4647                 if (params->supported_rates)
4648                         return -EINVAL;
4649                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4650                         return -EINVAL;
4651         }
4652
4653         if (statype != CFG80211_STA_AP_CLIENT &&
4654             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4655                 if (params->vlan)
4656                         return -EINVAL;
4657         }
4658
4659         switch (statype) {
4660         case CFG80211_STA_AP_MLME_CLIENT:
4661                 /* Use this only for authorizing/unauthorizing a station */
4662                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4663                         return -EOPNOTSUPP;
4664                 break;
4665         case CFG80211_STA_AP_CLIENT:
4666         case CFG80211_STA_AP_CLIENT_UNASSOC:
4667                 /* accept only the listed bits */
4668                 if (params->sta_flags_mask &
4669                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4670                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4671                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4672                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4673                                   BIT(NL80211_STA_FLAG_WME) |
4674                                   BIT(NL80211_STA_FLAG_MFP)))
4675                         return -EINVAL;
4676
4677                 /* but authenticated/associated only if driver handles it */
4678                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4679                     params->sta_flags_mask &
4680                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4681                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4682                         return -EINVAL;
4683                 break;
4684         case CFG80211_STA_IBSS:
4685         case CFG80211_STA_AP_STA:
4686                 /* reject any changes other than AUTHORIZED */
4687                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4688                         return -EINVAL;
4689                 break;
4690         case CFG80211_STA_TDLS_PEER_SETUP:
4691                 /* reject any changes other than AUTHORIZED or WME */
4692                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4693                                                BIT(NL80211_STA_FLAG_WME)))
4694                         return -EINVAL;
4695                 /* force (at least) rates when authorizing */
4696                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4697                     !params->supported_rates)
4698                         return -EINVAL;
4699                 break;
4700         case CFG80211_STA_TDLS_PEER_ACTIVE:
4701                 /* reject any changes */
4702                 return -EINVAL;
4703         case CFG80211_STA_MESH_PEER_KERNEL:
4704                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4705                         return -EINVAL;
4706                 break;
4707         case CFG80211_STA_MESH_PEER_USER:
4708                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4709                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4710                         return -EINVAL;
4711                 break;
4712         }
4713
4714         /*
4715          * Older kernel versions ignored this attribute entirely, so don't
4716          * reject attempts to update it but mark it as unused instead so the
4717          * driver won't look at the data.
4718          */
4719         if (statype != CFG80211_STA_AP_CLIENT_UNASSOC &&
4720             statype != CFG80211_STA_TDLS_PEER_SETUP)
4721                 params->opmode_notif_used = false;
4722
4723         return 0;
4724 }
4725 EXPORT_SYMBOL(cfg80211_check_station_change);
4726
4727 /*
4728  * Get vlan interface making sure it is running and on the right wiphy.
4729  */
4730 static struct net_device *get_vlan(struct genl_info *info,
4731                                    struct cfg80211_registered_device *rdev)
4732 {
4733         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4734         struct net_device *v;
4735         int ret;
4736
4737         if (!vlanattr)
4738                 return NULL;
4739
4740         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4741         if (!v)
4742                 return ERR_PTR(-ENODEV);
4743
4744         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4745                 ret = -EINVAL;
4746                 goto error;
4747         }
4748
4749         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4750             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4751             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4752                 ret = -EINVAL;
4753                 goto error;
4754         }
4755
4756         if (!netif_running(v)) {
4757                 ret = -ENETDOWN;
4758                 goto error;
4759         }
4760
4761         return v;
4762  error:
4763         dev_put(v);
4764         return ERR_PTR(ret);
4765 }
4766
4767 static const struct nla_policy
4768 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4769         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4770         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4771 };
4772
4773 static int nl80211_parse_sta_wme(struct genl_info *info,
4774                                  struct station_parameters *params)
4775 {
4776         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4777         struct nlattr *nla;
4778         int err;
4779
4780         /* parse WME attributes if present */
4781         if (!info->attrs[NL80211_ATTR_STA_WME])
4782                 return 0;
4783
4784         nla = info->attrs[NL80211_ATTR_STA_WME];
4785         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4786                                nl80211_sta_wme_policy, info->extack);
4787         if (err)
4788                 return err;
4789
4790         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4791                 params->uapsd_queues = nla_get_u8(
4792                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4793         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4794                 return -EINVAL;
4795
4796         if (tb[NL80211_STA_WME_MAX_SP])
4797                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4798
4799         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4800                 return -EINVAL;
4801
4802         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4803
4804         return 0;
4805 }
4806
4807 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4808                                       struct station_parameters *params)
4809 {
4810         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4811                 params->supported_channels =
4812                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4813                 params->supported_channels_len =
4814                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4815                 /*
4816                  * Need to include at least one (first channel, number of
4817                  * channels) tuple for each subband, and must have proper
4818                  * tuples for the rest of the data as well.
4819                  */
4820                 if (params->supported_channels_len < 2)
4821                         return -EINVAL;
4822                 if (params->supported_channels_len % 2)
4823                         return -EINVAL;
4824         }
4825
4826         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4827                 params->supported_oper_classes =
4828                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4829                 params->supported_oper_classes_len =
4830                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4831                 /*
4832                  * The value of the Length field of the Supported Operating
4833                  * Classes element is between 2 and 253.
4834                  */
4835                 if (params->supported_oper_classes_len < 2 ||
4836                     params->supported_oper_classes_len > 253)
4837                         return -EINVAL;
4838         }
4839         return 0;
4840 }
4841
4842 static int nl80211_set_station_tdls(struct genl_info *info,
4843                                     struct station_parameters *params)
4844 {
4845         int err;
4846         /* Dummy STA entry gets updated once the peer capabilities are known */
4847         if (info->attrs[NL80211_ATTR_PEER_AID])
4848                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4849         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4850                 params->ht_capa =
4851                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4852         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4853                 params->vht_capa =
4854                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4855
4856         err = nl80211_parse_sta_channel_info(info, params);
4857         if (err)
4858                 return err;
4859
4860         return nl80211_parse_sta_wme(info, params);
4861 }
4862
4863 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4864 {
4865         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4866         struct net_device *dev = info->user_ptr[1];
4867         struct station_parameters params;
4868         u8 *mac_addr;
4869         int err;
4870
4871         memset(&params, 0, sizeof(params));
4872
4873         if (!rdev->ops->change_station)
4874                 return -EOPNOTSUPP;
4875
4876         /*
4877          * AID and listen_interval properties can be set only for unassociated
4878          * station. Include these parameters here and will check them in
4879          * cfg80211_check_station_change().
4880          */
4881         if (info->attrs[NL80211_ATTR_STA_AID])
4882                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4883
4884         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4885                 params.listen_interval =
4886                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4887         else
4888                 params.listen_interval = -1;
4889
4890         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4891                 u8 tmp;
4892
4893                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4894                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4895                         return -EINVAL;
4896
4897                 params.support_p2p_ps = tmp;
4898         } else {
4899                 params.support_p2p_ps = -1;
4900         }
4901
4902         if (!info->attrs[NL80211_ATTR_MAC])
4903                 return -EINVAL;
4904
4905         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4906
4907         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4908                 params.supported_rates =
4909                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4910                 params.supported_rates_len =
4911                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4912         }
4913
4914         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4915                 params.capability =
4916                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4917                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4918         }
4919
4920         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4921                 params.ext_capab =
4922                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4923                 params.ext_capab_len =
4924                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4925         }
4926
4927         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4928                 return -EINVAL;
4929
4930         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4931                 params.plink_action =
4932                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4933                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4934                         return -EINVAL;
4935         }
4936
4937         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4938                 params.plink_state =
4939                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4940                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4941                         return -EINVAL;
4942                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4943                         params.peer_aid = nla_get_u16(
4944                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4945                         if (params.peer_aid > IEEE80211_MAX_AID)
4946                                 return -EINVAL;
4947                 }
4948                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4949         }
4950
4951         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4952                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4953                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4954
4955                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4956                     pm > NL80211_MESH_POWER_MAX)
4957                         return -EINVAL;
4958
4959                 params.local_pm = pm;
4960         }
4961
4962         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4963                 params.opmode_notif_used = true;
4964                 params.opmode_notif =
4965                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4966         }
4967
4968         /* Include parameters for TDLS peer (will check later) */
4969         err = nl80211_set_station_tdls(info, &params);
4970         if (err)
4971                 return err;
4972
4973         params.vlan = get_vlan(info, rdev);
4974         if (IS_ERR(params.vlan))
4975                 return PTR_ERR(params.vlan);
4976
4977         switch (dev->ieee80211_ptr->iftype) {
4978         case NL80211_IFTYPE_AP:
4979         case NL80211_IFTYPE_AP_VLAN:
4980         case NL80211_IFTYPE_P2P_GO:
4981         case NL80211_IFTYPE_P2P_CLIENT:
4982         case NL80211_IFTYPE_STATION:
4983         case NL80211_IFTYPE_ADHOC:
4984         case NL80211_IFTYPE_MESH_POINT:
4985                 break;
4986         default:
4987                 err = -EOPNOTSUPP;
4988                 goto out_put_vlan;
4989         }
4990
4991         /* driver will call cfg80211_check_station_change() */
4992         err = rdev_change_station(rdev, dev, mac_addr, &params);
4993
4994  out_put_vlan:
4995         if (params.vlan)
4996                 dev_put(params.vlan);
4997
4998         return err;
4999 }
5000
5001 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
5002 {
5003         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5004         int err;
5005         struct net_device *dev = info->user_ptr[1];
5006         struct station_parameters params;
5007         u8 *mac_addr = NULL;
5008         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
5009                          BIT(NL80211_STA_FLAG_ASSOCIATED);
5010
5011         memset(&params, 0, sizeof(params));
5012
5013         if (!rdev->ops->add_station)
5014                 return -EOPNOTSUPP;
5015
5016         if (!info->attrs[NL80211_ATTR_MAC])
5017                 return -EINVAL;
5018
5019         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
5020                 return -EINVAL;
5021
5022         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
5023                 return -EINVAL;
5024
5025         if (!info->attrs[NL80211_ATTR_STA_AID] &&
5026             !info->attrs[NL80211_ATTR_PEER_AID])
5027                 return -EINVAL;
5028
5029         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
5030         params.supported_rates =
5031                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
5032         params.supported_rates_len =
5033                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
5034         params.listen_interval =
5035                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
5036
5037         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
5038                 u8 tmp;
5039
5040                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
5041                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
5042                         return -EINVAL;
5043
5044                 params.support_p2p_ps = tmp;
5045         } else {
5046                 /*
5047                  * if not specified, assume it's supported for P2P GO interface,
5048                  * and is NOT supported for AP interface
5049                  */
5050                 params.support_p2p_ps =
5051                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
5052         }
5053
5054         if (info->attrs[NL80211_ATTR_PEER_AID])
5055                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
5056         else
5057                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
5058         if (!params.aid || params.aid > IEEE80211_MAX_AID)
5059                 return -EINVAL;
5060
5061         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
5062                 params.capability =
5063                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
5064                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
5065         }
5066
5067         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
5068                 params.ext_capab =
5069                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
5070                 params.ext_capab_len =
5071                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
5072         }
5073
5074         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
5075                 params.ht_capa =
5076                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5077
5078         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
5079                 params.vht_capa =
5080                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
5081
5082         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
5083                 params.opmode_notif_used = true;
5084                 params.opmode_notif =
5085                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
5086         }
5087
5088         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
5089                 params.plink_action =
5090                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
5091                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
5092                         return -EINVAL;
5093         }
5094
5095         err = nl80211_parse_sta_channel_info(info, &params);
5096         if (err)
5097                 return err;
5098
5099         err = nl80211_parse_sta_wme(info, &params);
5100         if (err)
5101                 return err;
5102
5103         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
5104                 return -EINVAL;
5105
5106         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
5107          * as userspace might just pass through the capabilities from the IEs
5108          * directly, rather than enforcing this restriction and returning an
5109          * error in this case.
5110          */
5111         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
5112                 params.ht_capa = NULL;
5113                 params.vht_capa = NULL;
5114         }
5115
5116         /* When you run into this, adjust the code below for the new flag */
5117         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
5118
5119         switch (dev->ieee80211_ptr->iftype) {
5120         case NL80211_IFTYPE_AP:
5121         case NL80211_IFTYPE_AP_VLAN:
5122         case NL80211_IFTYPE_P2P_GO:
5123                 /* ignore WME attributes if iface/sta is not capable */
5124                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
5125                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
5126                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5127
5128                 /* TDLS peers cannot be added */
5129                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5130                     info->attrs[NL80211_ATTR_PEER_AID])
5131                         return -EINVAL;
5132                 /* but don't bother the driver with it */
5133                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
5134
5135                 /* allow authenticated/associated only if driver handles it */
5136                 if (!(rdev->wiphy.features &
5137                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
5138                     params.sta_flags_mask & auth_assoc)
5139                         return -EINVAL;
5140
5141                 /* Older userspace, or userspace wanting to be compatible with
5142                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
5143                  * and assoc flags in the mask, but assumes the station will be
5144                  * added as associated anyway since this was the required driver
5145                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
5146                  * introduced.
5147                  * In order to not bother drivers with this quirk in the API
5148                  * set the flags in both the mask and set for new stations in
5149                  * this case.
5150                  */
5151                 if (!(params.sta_flags_mask & auth_assoc)) {
5152                         params.sta_flags_mask |= auth_assoc;
5153                         params.sta_flags_set |= auth_assoc;
5154                 }
5155
5156                 /* must be last in here for error handling */
5157                 params.vlan = get_vlan(info, rdev);
5158                 if (IS_ERR(params.vlan))
5159                         return PTR_ERR(params.vlan);
5160                 break;
5161         case NL80211_IFTYPE_MESH_POINT:
5162                 /* ignore uAPSD data */
5163                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5164
5165                 /* associated is disallowed */
5166                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
5167                         return -EINVAL;
5168                 /* TDLS peers cannot be added */
5169                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5170                     info->attrs[NL80211_ATTR_PEER_AID])
5171                         return -EINVAL;
5172                 break;
5173         case NL80211_IFTYPE_STATION:
5174         case NL80211_IFTYPE_P2P_CLIENT:
5175                 /* ignore uAPSD data */
5176                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5177
5178                 /* these are disallowed */
5179                 if (params.sta_flags_mask &
5180                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
5181                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
5182                         return -EINVAL;
5183                 /* Only TDLS peers can be added */
5184                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
5185                         return -EINVAL;
5186                 /* Can only add if TDLS ... */
5187                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
5188                         return -EOPNOTSUPP;
5189                 /* ... with external setup is supported */
5190                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
5191                         return -EOPNOTSUPP;
5192                 /*
5193                  * Older wpa_supplicant versions always mark the TDLS peer
5194                  * as authorized, but it shouldn't yet be.
5195                  */
5196                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
5197                 break;
5198         default:
5199                 return -EOPNOTSUPP;
5200         }
5201
5202         /* be aware of params.vlan when changing code here */
5203
5204         err = rdev_add_station(rdev, dev, mac_addr, &params);
5205
5206         if (params.vlan)
5207                 dev_put(params.vlan);
5208         return err;
5209 }
5210
5211 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
5212 {
5213         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5214         struct net_device *dev = info->user_ptr[1];
5215         struct station_del_parameters params;
5216
5217         memset(&params, 0, sizeof(params));
5218
5219         if (info->attrs[NL80211_ATTR_MAC])
5220                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
5221
5222         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5223             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5224             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5225             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5226                 return -EINVAL;
5227
5228         if (!rdev->ops->del_station)
5229                 return -EOPNOTSUPP;
5230
5231         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
5232                 params.subtype =
5233                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
5234                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
5235                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
5236                         return -EINVAL;
5237         } else {
5238                 /* Default to Deauthentication frame */
5239                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
5240         }
5241
5242         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
5243                 params.reason_code =
5244                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5245                 if (params.reason_code == 0)
5246                         return -EINVAL; /* 0 is reserved */
5247         } else {
5248                 /* Default to reason code 2 */
5249                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
5250         }
5251
5252         return rdev_del_station(rdev, dev, &params);
5253 }
5254
5255 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
5256                                 int flags, struct net_device *dev,
5257                                 u8 *dst, u8 *next_hop,
5258                                 struct mpath_info *pinfo)
5259 {
5260         void *hdr;
5261         struct nlattr *pinfoattr;
5262
5263         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
5264         if (!hdr)
5265                 return -1;
5266
5267         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5268             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
5269             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
5270             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
5271                 goto nla_put_failure;
5272
5273         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
5274         if (!pinfoattr)
5275                 goto nla_put_failure;
5276         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
5277             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
5278                         pinfo->frame_qlen))
5279                 goto nla_put_failure;
5280         if (((pinfo->filled & MPATH_INFO_SN) &&
5281              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
5282             ((pinfo->filled & MPATH_INFO_METRIC) &&
5283              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
5284                          pinfo->metric)) ||
5285             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
5286              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
5287                          pinfo->exptime)) ||
5288             ((pinfo->filled & MPATH_INFO_FLAGS) &&
5289              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
5290                         pinfo->flags)) ||
5291             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
5292              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
5293                          pinfo->discovery_timeout)) ||
5294             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
5295              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
5296                         pinfo->discovery_retries)))
5297                 goto nla_put_failure;
5298
5299         nla_nest_end(msg, pinfoattr);
5300
5301         genlmsg_end(msg, hdr);
5302         return 0;
5303
5304  nla_put_failure:
5305         genlmsg_cancel(msg, hdr);
5306         return -EMSGSIZE;
5307 }
5308
5309 static int nl80211_dump_mpath(struct sk_buff *skb,
5310                               struct netlink_callback *cb)
5311 {
5312         struct mpath_info pinfo;
5313         struct cfg80211_registered_device *rdev;
5314         struct wireless_dev *wdev;
5315         u8 dst[ETH_ALEN];
5316         u8 next_hop[ETH_ALEN];
5317         int path_idx = cb->args[2];
5318         int err;
5319
5320         rtnl_lock();
5321         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5322         if (err)
5323                 goto out_err;
5324
5325         if (!rdev->ops->dump_mpath) {
5326                 err = -EOPNOTSUPP;
5327                 goto out_err;
5328         }
5329
5330         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5331                 err = -EOPNOTSUPP;
5332                 goto out_err;
5333         }
5334
5335         while (1) {
5336                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
5337                                       next_hop, &pinfo);
5338                 if (err == -ENOENT)
5339                         break;
5340                 if (err)
5341                         goto out_err;
5342
5343                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5344                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5345                                        wdev->netdev, dst, next_hop,
5346                                        &pinfo) < 0)
5347                         goto out;
5348
5349                 path_idx++;
5350         }
5351
5352  out:
5353         cb->args[2] = path_idx;
5354         err = skb->len;
5355  out_err:
5356         rtnl_unlock();
5357         return err;
5358 }
5359
5360 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
5361 {
5362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5363         int err;
5364         struct net_device *dev = info->user_ptr[1];
5365         struct mpath_info pinfo;
5366         struct sk_buff *msg;
5367         u8 *dst = NULL;
5368         u8 next_hop[ETH_ALEN];
5369
5370         memset(&pinfo, 0, sizeof(pinfo));
5371
5372         if (!info->attrs[NL80211_ATTR_MAC])
5373                 return -EINVAL;
5374
5375         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5376
5377         if (!rdev->ops->get_mpath)
5378                 return -EOPNOTSUPP;
5379
5380         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5381                 return -EOPNOTSUPP;
5382
5383         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
5384         if (err)
5385                 return err;
5386
5387         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5388         if (!msg)
5389                 return -ENOMEM;
5390
5391         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5392                                  dev, dst, next_hop, &pinfo) < 0) {
5393                 nlmsg_free(msg);
5394                 return -ENOBUFS;
5395         }
5396
5397         return genlmsg_reply(msg, info);
5398 }
5399
5400 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
5401 {
5402         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5403         struct net_device *dev = info->user_ptr[1];
5404         u8 *dst = NULL;
5405         u8 *next_hop = NULL;
5406
5407         if (!info->attrs[NL80211_ATTR_MAC])
5408                 return -EINVAL;
5409
5410         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5411                 return -EINVAL;
5412
5413         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5414         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5415
5416         if (!rdev->ops->change_mpath)
5417                 return -EOPNOTSUPP;
5418
5419         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5420                 return -EOPNOTSUPP;
5421
5422         return rdev_change_mpath(rdev, dev, dst, next_hop);
5423 }
5424
5425 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
5426 {
5427         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5428         struct net_device *dev = info->user_ptr[1];
5429         u8 *dst = NULL;
5430         u8 *next_hop = NULL;
5431
5432         if (!info->attrs[NL80211_ATTR_MAC])
5433                 return -EINVAL;
5434
5435         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5436                 return -EINVAL;
5437
5438         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5439         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5440
5441         if (!rdev->ops->add_mpath)
5442                 return -EOPNOTSUPP;
5443
5444         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5445                 return -EOPNOTSUPP;
5446
5447         return rdev_add_mpath(rdev, dev, dst, next_hop);
5448 }
5449
5450 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
5451 {
5452         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5453         struct net_device *dev = info->user_ptr[1];
5454         u8 *dst = NULL;
5455
5456         if (info->attrs[NL80211_ATTR_MAC])
5457                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5458
5459         if (!rdev->ops->del_mpath)
5460                 return -EOPNOTSUPP;
5461
5462         return rdev_del_mpath(rdev, dev, dst);
5463 }
5464
5465 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
5466 {
5467         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5468         int err;
5469         struct net_device *dev = info->user_ptr[1];
5470         struct mpath_info pinfo;
5471         struct sk_buff *msg;
5472         u8 *dst = NULL;
5473         u8 mpp[ETH_ALEN];
5474
5475         memset(&pinfo, 0, sizeof(pinfo));
5476
5477         if (!info->attrs[NL80211_ATTR_MAC])
5478                 return -EINVAL;
5479
5480         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5481
5482         if (!rdev->ops->get_mpp)
5483                 return -EOPNOTSUPP;
5484
5485         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5486                 return -EOPNOTSUPP;
5487
5488         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
5489         if (err)
5490                 return err;
5491
5492         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5493         if (!msg)
5494                 return -ENOMEM;
5495
5496         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5497                                dev, dst, mpp, &pinfo) < 0) {
5498                 nlmsg_free(msg);
5499                 return -ENOBUFS;
5500         }
5501
5502         return genlmsg_reply(msg, info);
5503 }
5504
5505 static int nl80211_dump_mpp(struct sk_buff *skb,
5506                             struct netlink_callback *cb)
5507 {
5508         struct mpath_info pinfo;
5509         struct cfg80211_registered_device *rdev;
5510         struct wireless_dev *wdev;
5511         u8 dst[ETH_ALEN];
5512         u8 mpp[ETH_ALEN];
5513         int path_idx = cb->args[2];
5514         int err;
5515
5516         rtnl_lock();
5517         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5518         if (err)
5519                 goto out_err;
5520
5521         if (!rdev->ops->dump_mpp) {
5522                 err = -EOPNOTSUPP;
5523                 goto out_err;
5524         }
5525
5526         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5527                 err = -EOPNOTSUPP;
5528                 goto out_err;
5529         }
5530
5531         while (1) {
5532                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5533                                     mpp, &pinfo);
5534                 if (err == -ENOENT)
5535                         break;
5536                 if (err)
5537                         goto out_err;
5538
5539                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5540                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5541                                        wdev->netdev, dst, mpp,
5542                                        &pinfo) < 0)
5543                         goto out;
5544
5545                 path_idx++;
5546         }
5547
5548  out:
5549         cb->args[2] = path_idx;
5550         err = skb->len;
5551  out_err:
5552         rtnl_unlock();
5553         return err;
5554 }
5555
5556 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5557 {
5558         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5559         struct net_device *dev = info->user_ptr[1];
5560         struct wireless_dev *wdev = dev->ieee80211_ptr;
5561         struct bss_parameters params;
5562         int err;
5563
5564         memset(&params, 0, sizeof(params));
5565         /* default to not changing parameters */
5566         params.use_cts_prot = -1;
5567         params.use_short_preamble = -1;
5568         params.use_short_slot_time = -1;
5569         params.ap_isolate = -1;
5570         params.ht_opmode = -1;
5571         params.p2p_ctwindow = -1;
5572         params.p2p_opp_ps = -1;
5573
5574         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5575                 params.use_cts_prot =
5576                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5577         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5578                 params.use_short_preamble =
5579                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5580         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5581                 params.use_short_slot_time =
5582                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5583         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5584                 params.basic_rates =
5585                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5586                 params.basic_rates_len =
5587                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5588         }
5589         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5590                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5591         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5592                 params.ht_opmode =
5593                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5594
5595         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5596                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5597                         return -EINVAL;
5598                 params.p2p_ctwindow =
5599                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5600                 if (params.p2p_ctwindow < 0)
5601                         return -EINVAL;
5602                 if (params.p2p_ctwindow != 0 &&
5603                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5604                         return -EINVAL;
5605         }
5606
5607         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5608                 u8 tmp;
5609
5610                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5611                         return -EINVAL;
5612                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5613                 if (tmp > 1)
5614                         return -EINVAL;
5615                 params.p2p_opp_ps = tmp;
5616                 if (params.p2p_opp_ps &&
5617                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5618                         return -EINVAL;
5619         }
5620
5621         if (!rdev->ops->change_bss)
5622                 return -EOPNOTSUPP;
5623
5624         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5625             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5626                 return -EOPNOTSUPP;
5627
5628         wdev_lock(wdev);
5629         err = rdev_change_bss(rdev, dev, &params);
5630         wdev_unlock(wdev);
5631
5632         return err;
5633 }
5634
5635 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5636 {
5637         char *data = NULL;
5638         bool is_indoor;
5639         enum nl80211_user_reg_hint_type user_reg_hint_type;
5640         u32 owner_nlportid;
5641
5642         /*
5643          * You should only get this when cfg80211 hasn't yet initialized
5644          * completely when built-in to the kernel right between the time
5645          * window between nl80211_init() and regulatory_init(), if that is
5646          * even possible.
5647          */
5648         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5649                 return -EINPROGRESS;
5650
5651         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5652                 user_reg_hint_type =
5653                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5654         else
5655                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5656
5657         switch (user_reg_hint_type) {
5658         case NL80211_USER_REG_HINT_USER:
5659         case NL80211_USER_REG_HINT_CELL_BASE:
5660                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5661                         return -EINVAL;
5662
5663                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5664                 return regulatory_hint_user(data, user_reg_hint_type);
5665         case NL80211_USER_REG_HINT_INDOOR:
5666                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5667                         owner_nlportid = info->snd_portid;
5668                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5669                 } else {
5670                         owner_nlportid = 0;
5671                         is_indoor = true;
5672                 }
5673
5674                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5675         default:
5676                 return -EINVAL;
5677         }
5678 }
5679
5680 static int nl80211_get_mesh_config(struct sk_buff *skb,
5681                                    struct genl_info *info)
5682 {
5683         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5684         struct net_device *dev = info->user_ptr[1];
5685         struct wireless_dev *wdev = dev->ieee80211_ptr;
5686         struct mesh_config cur_params;
5687         int err = 0;
5688         void *hdr;
5689         struct nlattr *pinfoattr;
5690         struct sk_buff *msg;
5691
5692         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5693                 return -EOPNOTSUPP;
5694
5695         if (!rdev->ops->get_mesh_config)
5696                 return -EOPNOTSUPP;
5697
5698         wdev_lock(wdev);
5699         /* If not connected, get default parameters */
5700         if (!wdev->mesh_id_len)
5701                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5702         else
5703                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5704         wdev_unlock(wdev);
5705
5706         if (err)
5707                 return err;
5708
5709         /* Draw up a netlink message to send back */
5710         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5711         if (!msg)
5712                 return -ENOMEM;
5713         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5714                              NL80211_CMD_GET_MESH_CONFIG);
5715         if (!hdr)
5716                 goto out;
5717         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5718         if (!pinfoattr)
5719                 goto nla_put_failure;
5720         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5721             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5722                         cur_params.dot11MeshRetryTimeout) ||
5723             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5724                         cur_params.dot11MeshConfirmTimeout) ||
5725             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5726                         cur_params.dot11MeshHoldingTimeout) ||
5727             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5728                         cur_params.dot11MeshMaxPeerLinks) ||
5729             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5730                        cur_params.dot11MeshMaxRetries) ||
5731             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5732                        cur_params.dot11MeshTTL) ||
5733             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5734                        cur_params.element_ttl) ||
5735             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5736                        cur_params.auto_open_plinks) ||
5737             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5738                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5739             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5740                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5741             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5742                         cur_params.path_refresh_time) ||
5743             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5744                         cur_params.min_discovery_timeout) ||
5745             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5746                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5747             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5748                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5749             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5750                         cur_params.dot11MeshHWMPperrMinInterval) ||
5751             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5752                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5753             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5754                        cur_params.dot11MeshHWMPRootMode) ||
5755             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5756                         cur_params.dot11MeshHWMPRannInterval) ||
5757             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5758                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5759             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5760                        cur_params.dot11MeshForwarding) ||
5761             nla_put_s32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5762                         cur_params.rssi_threshold) ||
5763             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5764                         cur_params.ht_opmode) ||
5765             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5766                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5767             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5768                         cur_params.dot11MeshHWMProotInterval) ||
5769             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5770                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5771             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5772                         cur_params.power_mode) ||
5773             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5774                         cur_params.dot11MeshAwakeWindowDuration) ||
5775             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5776                         cur_params.plink_timeout))
5777                 goto nla_put_failure;
5778         nla_nest_end(msg, pinfoattr);
5779         genlmsg_end(msg, hdr);
5780         return genlmsg_reply(msg, info);
5781
5782  nla_put_failure:
5783         genlmsg_cancel(msg, hdr);
5784  out:
5785         nlmsg_free(msg);
5786         return -ENOBUFS;
5787 }
5788
5789 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5790         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5791         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5792         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5793         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5794         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5795         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5796         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5797         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5798         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5799         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5800         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5801         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5802         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5803         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5804         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5805         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5806         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5807         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5808         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5809         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5810         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5811         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5812         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5813         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5814         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5815         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5816         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5817         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5818 };
5819
5820 static const struct nla_policy
5821         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5822         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5823         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5824         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5825         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5826         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5827         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5828         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5829                                     .len = IEEE80211_MAX_DATA_LEN },
5830         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5831 };
5832
5833 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5834 {
5835         u8 val = nla_get_u8(nla);
5836         if (val < min || val > max)
5837                 return -EINVAL;
5838         *out = val;
5839         return 0;
5840 }
5841
5842 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5843 {
5844         u8 val = nla_get_u8(nla);
5845         if (val < min || val > max)
5846                 return -EINVAL;
5847         *out = val;
5848         return 0;
5849 }
5850
5851 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5852 {
5853         u16 val = nla_get_u16(nla);
5854         if (val < min || val > max)
5855                 return -EINVAL;
5856         *out = val;
5857         return 0;
5858 }
5859
5860 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5861 {
5862         u32 val = nla_get_u32(nla);
5863         if (val < min || val > max)
5864                 return -EINVAL;
5865         *out = val;
5866         return 0;
5867 }
5868
5869 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5870 {
5871         s32 val = nla_get_s32(nla);
5872         if (val < min || val > max)
5873                 return -EINVAL;
5874         *out = val;
5875         return 0;
5876 }
5877
5878 static int nl80211_check_power_mode(const struct nlattr *nla,
5879                                     enum nl80211_mesh_power_mode min,
5880                                     enum nl80211_mesh_power_mode max,
5881                                     enum nl80211_mesh_power_mode *out)
5882 {
5883         u32 val = nla_get_u32(nla);
5884         if (val < min || val > max)
5885                 return -EINVAL;
5886         *out = val;
5887         return 0;
5888 }
5889
5890 static int nl80211_parse_mesh_config(struct genl_info *info,
5891                                      struct mesh_config *cfg,
5892                                      u32 *mask_out)
5893 {
5894         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5895         u32 mask = 0;
5896         u16 ht_opmode;
5897
5898 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5899 do {                                                                        \
5900         if (tb[attr]) {                                                     \
5901                 if (fn(tb[attr], min, max, &cfg->param))                    \
5902                         return -EINVAL;                                     \
5903                 mask |= (1 << (attr - 1));                                  \
5904         }                                                                   \
5905 } while (0)
5906
5907         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5908                 return -EINVAL;
5909         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5910                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5911                              nl80211_meshconf_params_policy, info->extack))
5912                 return -EINVAL;
5913
5914         /* This makes sure that there aren't more than 32 mesh config
5915          * parameters (otherwise our bitfield scheme would not work.) */
5916         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5917
5918         /* Fill in the params struct */
5919         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5920                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5921                                   nl80211_check_u16);
5922         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5923                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5924                                   nl80211_check_u16);
5925         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5926                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5927                                   nl80211_check_u16);
5928         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5929                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5930                                   nl80211_check_u16);
5931         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5932                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5933                                   nl80211_check_u8);
5934         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5935                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5936         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5937                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5938                                   nl80211_check_u8);
5939         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5940                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5941                                   nl80211_check_bool);
5942         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5943                                   1, 255, mask,
5944                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5945                                   nl80211_check_u32);
5946         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5947                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5948                                   nl80211_check_u8);
5949         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5950                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5951                                   nl80211_check_u32);
5952         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5953                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5954                                   nl80211_check_u16);
5955         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5956                                   1, 65535, mask,
5957                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5958                                   nl80211_check_u32);
5959         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5960                                   1, 65535, mask,
5961                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5962                                   nl80211_check_u16);
5963         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5964                                   1, 65535, mask,
5965                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5966                                   nl80211_check_u16);
5967         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5968                                   dot11MeshHWMPnetDiameterTraversalTime,
5969                                   1, 65535, mask,
5970                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5971                                   nl80211_check_u16);
5972         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5973                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5974                                   nl80211_check_u8);
5975         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5976                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5977                                   nl80211_check_u16);
5978         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5979                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5980                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5981                                   nl80211_check_bool);
5982         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5983                                   mask, NL80211_MESHCONF_FORWARDING,
5984                                   nl80211_check_bool);
5985         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5986                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5987                                   nl80211_check_s32);
5988         /*
5989          * Check HT operation mode based on
5990          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5991          */
5992         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5993                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5994
5995                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5996                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5997                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5998                         return -EINVAL;
5999
6000                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
6001                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
6002                         return -EINVAL;
6003
6004                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
6005                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
6006                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
6007                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
6008                                 return -EINVAL;
6009                         break;
6010                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
6011                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
6012                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
6013                                 return -EINVAL;
6014                         break;
6015                 }
6016                 cfg->ht_opmode = ht_opmode;
6017                 mask |= (1 << (NL80211_MESHCONF_HT_OPMODE - 1));
6018         }
6019         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
6020                                   1, 65535, mask,
6021                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
6022                                   nl80211_check_u32);
6023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
6024                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
6025                                   nl80211_check_u16);
6026         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
6027                                   dot11MeshHWMPconfirmationInterval,
6028                                   1, 65535, mask,
6029                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
6030                                   nl80211_check_u16);
6031         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
6032                                   NL80211_MESH_POWER_ACTIVE,
6033                                   NL80211_MESH_POWER_MAX,
6034                                   mask, NL80211_MESHCONF_POWER_MODE,
6035                                   nl80211_check_power_mode);
6036         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
6037                                   0, 65535, mask,
6038                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
6039         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
6040                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
6041                                   nl80211_check_u32);
6042         if (mask_out)
6043                 *mask_out = mask;
6044
6045         return 0;
6046
6047 #undef FILL_IN_MESH_PARAM_IF_SET
6048 }
6049
6050 static int nl80211_parse_mesh_setup(struct genl_info *info,
6051                                      struct mesh_setup *setup)
6052 {
6053         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6054         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
6055
6056         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
6057                 return -EINVAL;
6058         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
6059                              info->attrs[NL80211_ATTR_MESH_SETUP],
6060                              nl80211_mesh_setup_params_policy, info->extack))
6061                 return -EINVAL;
6062
6063         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
6064                 setup->sync_method =
6065                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
6066                  IEEE80211_SYNC_METHOD_VENDOR :
6067                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
6068
6069         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
6070                 setup->path_sel_proto =
6071                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
6072                  IEEE80211_PATH_PROTOCOL_VENDOR :
6073                  IEEE80211_PATH_PROTOCOL_HWMP;
6074
6075         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
6076                 setup->path_metric =
6077                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
6078                  IEEE80211_PATH_METRIC_VENDOR :
6079                  IEEE80211_PATH_METRIC_AIRTIME;
6080
6081         if (tb[NL80211_MESH_SETUP_IE]) {
6082                 struct nlattr *ieattr =
6083                         tb[NL80211_MESH_SETUP_IE];
6084                 if (!is_valid_ie_attr(ieattr))
6085                         return -EINVAL;
6086                 setup->ie = nla_data(ieattr);
6087                 setup->ie_len = nla_len(ieattr);
6088         }
6089         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
6090             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
6091                 return -EINVAL;
6092         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
6093         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
6094         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
6095         if (setup->is_secure)
6096                 setup->user_mpm = true;
6097
6098         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
6099                 if (!setup->user_mpm)
6100                         return -EINVAL;
6101                 setup->auth_id =
6102                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
6103         }
6104
6105         return 0;
6106 }
6107
6108 static int nl80211_update_mesh_config(struct sk_buff *skb,
6109                                       struct genl_info *info)
6110 {
6111         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6112         struct net_device *dev = info->user_ptr[1];
6113         struct wireless_dev *wdev = dev->ieee80211_ptr;
6114         struct mesh_config cfg;
6115         u32 mask;
6116         int err;
6117
6118         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
6119                 return -EOPNOTSUPP;
6120
6121         if (!rdev->ops->update_mesh_config)
6122                 return -EOPNOTSUPP;
6123
6124         err = nl80211_parse_mesh_config(info, &cfg, &mask);
6125         if (err)
6126                 return err;
6127
6128         wdev_lock(wdev);
6129         if (!wdev->mesh_id_len)
6130                 err = -ENOLINK;
6131
6132         if (!err)
6133                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
6134
6135         wdev_unlock(wdev);
6136
6137         return err;
6138 }
6139
6140 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
6141                               struct sk_buff *msg)
6142 {
6143         struct nlattr *nl_reg_rules;
6144         unsigned int i;
6145
6146         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
6147             (regdom->dfs_region &&
6148              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
6149                 goto nla_put_failure;
6150
6151         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
6152         if (!nl_reg_rules)
6153                 goto nla_put_failure;
6154
6155         for (i = 0; i < regdom->n_reg_rules; i++) {
6156                 struct nlattr *nl_reg_rule;
6157                 const struct ieee80211_reg_rule *reg_rule;
6158                 const struct ieee80211_freq_range *freq_range;
6159                 const struct ieee80211_power_rule *power_rule;
6160                 unsigned int max_bandwidth_khz;
6161
6162                 reg_rule = &regdom->reg_rules[i];
6163                 freq_range = &reg_rule->freq_range;
6164                 power_rule = &reg_rule->power_rule;
6165
6166                 nl_reg_rule = nla_nest_start(msg, i);
6167                 if (!nl_reg_rule)
6168                         goto nla_put_failure;
6169
6170                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
6171                 if (!max_bandwidth_khz)
6172                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
6173                                                                   reg_rule);
6174
6175                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
6176                                 reg_rule->flags) ||
6177                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
6178                                 freq_range->start_freq_khz) ||
6179                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
6180                                 freq_range->end_freq_khz) ||
6181                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
6182                                 max_bandwidth_khz) ||
6183                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
6184                                 power_rule->max_antenna_gain) ||
6185                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
6186                                 power_rule->max_eirp) ||
6187                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
6188                                 reg_rule->dfs_cac_ms))
6189                         goto nla_put_failure;
6190
6191                 nla_nest_end(msg, nl_reg_rule);
6192         }
6193
6194         nla_nest_end(msg, nl_reg_rules);
6195         return 0;
6196
6197 nla_put_failure:
6198         return -EMSGSIZE;
6199 }
6200
6201 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
6202 {
6203         const struct ieee80211_regdomain *regdom = NULL;
6204         struct cfg80211_registered_device *rdev;
6205         struct wiphy *wiphy = NULL;
6206         struct sk_buff *msg;
6207         void *hdr;
6208
6209         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6210         if (!msg)
6211                 return -ENOBUFS;
6212
6213         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6214                              NL80211_CMD_GET_REG);
6215         if (!hdr)
6216                 goto put_failure;
6217
6218         if (info->attrs[NL80211_ATTR_WIPHY]) {
6219                 bool self_managed;
6220
6221                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6222                 if (IS_ERR(rdev)) {
6223                         nlmsg_free(msg);
6224                         return PTR_ERR(rdev);
6225                 }
6226
6227                 wiphy = &rdev->wiphy;
6228                 self_managed = wiphy->regulatory_flags &
6229                                REGULATORY_WIPHY_SELF_MANAGED;
6230                 regdom = get_wiphy_regdom(wiphy);
6231
6232                 /* a self-managed-reg device must have a private regdom */
6233                 if (WARN_ON(!regdom && self_managed)) {
6234                         nlmsg_free(msg);
6235                         return -EINVAL;
6236                 }
6237
6238                 if (regdom &&
6239                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6240                         goto nla_put_failure;
6241         }
6242
6243         if (!wiphy && reg_last_request_cell_base() &&
6244             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6245                         NL80211_USER_REG_HINT_CELL_BASE))
6246                 goto nla_put_failure;
6247
6248         rcu_read_lock();
6249
6250         if (!regdom)
6251                 regdom = rcu_dereference(cfg80211_regdomain);
6252
6253         if (nl80211_put_regdom(regdom, msg))
6254                 goto nla_put_failure_rcu;
6255
6256         rcu_read_unlock();
6257
6258         genlmsg_end(msg, hdr);
6259         return genlmsg_reply(msg, info);
6260
6261 nla_put_failure_rcu:
6262         rcu_read_unlock();
6263 nla_put_failure:
6264         genlmsg_cancel(msg, hdr);
6265 put_failure:
6266         nlmsg_free(msg);
6267         return -EMSGSIZE;
6268 }
6269
6270 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
6271                                u32 seq, int flags, struct wiphy *wiphy,
6272                                const struct ieee80211_regdomain *regdom)
6273 {
6274         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6275                                    NL80211_CMD_GET_REG);
6276
6277         if (!hdr)
6278                 return -1;
6279
6280         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6281
6282         if (nl80211_put_regdom(regdom, msg))
6283                 goto nla_put_failure;
6284
6285         if (!wiphy && reg_last_request_cell_base() &&
6286             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6287                         NL80211_USER_REG_HINT_CELL_BASE))
6288                 goto nla_put_failure;
6289
6290         if (wiphy &&
6291             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6292                 goto nla_put_failure;
6293
6294         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
6295             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
6296                 goto nla_put_failure;
6297
6298         genlmsg_end(msg, hdr);
6299         return 0;
6300
6301 nla_put_failure:
6302         genlmsg_cancel(msg, hdr);
6303         return -EMSGSIZE;
6304 }
6305
6306 static int nl80211_get_reg_dump(struct sk_buff *skb,
6307                                 struct netlink_callback *cb)
6308 {
6309         const struct ieee80211_regdomain *regdom = NULL;
6310         struct cfg80211_registered_device *rdev;
6311         int err, reg_idx, start = cb->args[2];
6312
6313         rtnl_lock();
6314
6315         if (cfg80211_regdomain && start == 0) {
6316                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6317                                           NLM_F_MULTI, NULL,
6318                                           rtnl_dereference(cfg80211_regdomain));
6319                 if (err < 0)
6320                         goto out_err;
6321         }
6322
6323         /* the global regdom is idx 0 */
6324         reg_idx = 1;
6325         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
6326                 regdom = get_wiphy_regdom(&rdev->wiphy);
6327                 if (!regdom)
6328                         continue;
6329
6330                 if (++reg_idx <= start)
6331                         continue;
6332
6333                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6334                                           NLM_F_MULTI, &rdev->wiphy, regdom);
6335                 if (err < 0) {
6336                         reg_idx--;
6337                         break;
6338                 }
6339         }
6340
6341         cb->args[2] = reg_idx;
6342         err = skb->len;
6343 out_err:
6344         rtnl_unlock();
6345         return err;
6346 }
6347
6348 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
6349 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
6350         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
6351         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
6352         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
6353         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
6354         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
6355         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
6356         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
6357 };
6358
6359 static int parse_reg_rule(struct nlattr *tb[],
6360         struct ieee80211_reg_rule *reg_rule)
6361 {
6362         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
6363         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
6364
6365         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
6366                 return -EINVAL;
6367         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
6368                 return -EINVAL;
6369         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
6370                 return -EINVAL;
6371         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
6372                 return -EINVAL;
6373         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
6374                 return -EINVAL;
6375
6376         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
6377
6378         freq_range->start_freq_khz =
6379                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
6380         freq_range->end_freq_khz =
6381                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
6382         freq_range->max_bandwidth_khz =
6383                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
6384
6385         power_rule->max_eirp =
6386                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
6387
6388         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
6389                 power_rule->max_antenna_gain =
6390                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
6391
6392         if (tb[NL80211_ATTR_DFS_CAC_TIME])
6393                 reg_rule->dfs_cac_ms =
6394                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
6395
6396         return 0;
6397 }
6398
6399 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
6400 {
6401         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
6402         struct nlattr *nl_reg_rule;
6403         char *alpha2;
6404         int rem_reg_rules, r;
6405         u32 num_rules = 0, rule_idx = 0, size_of_regd;
6406         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
6407         struct ieee80211_regdomain *rd;
6408
6409         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
6410                 return -EINVAL;
6411
6412         if (!info->attrs[NL80211_ATTR_REG_RULES])
6413                 return -EINVAL;
6414
6415         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
6416
6417         if (info->attrs[NL80211_ATTR_DFS_REGION])
6418                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
6419
6420         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6421                             rem_reg_rules) {
6422                 num_rules++;
6423                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
6424                         return -EINVAL;
6425         }
6426
6427         if (!reg_is_valid_request(alpha2))
6428                 return -EINVAL;
6429
6430         size_of_regd = sizeof(struct ieee80211_regdomain) +
6431                        num_rules * sizeof(struct ieee80211_reg_rule);
6432
6433         rd = kzalloc(size_of_regd, GFP_KERNEL);
6434         if (!rd)
6435                 return -ENOMEM;
6436
6437         rd->n_reg_rules = num_rules;
6438         rd->alpha2[0] = alpha2[0];
6439         rd->alpha2[1] = alpha2[1];
6440
6441         /*
6442          * Disable DFS master mode if the DFS region was
6443          * not supported or known on this kernel.
6444          */
6445         if (reg_supported_dfs_region(dfs_region))
6446                 rd->dfs_region = dfs_region;
6447
6448         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6449                             rem_reg_rules) {
6450                 r = nla_parse_nested(tb, NL80211_REG_RULE_ATTR_MAX,
6451                                      nl_reg_rule, reg_rule_policy,
6452                                      info->extack);
6453                 if (r)
6454                         goto bad_reg;
6455                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
6456                 if (r)
6457                         goto bad_reg;
6458
6459                 rule_idx++;
6460
6461                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
6462                         r = -EINVAL;
6463                         goto bad_reg;
6464                 }
6465         }
6466
6467         /* set_regdom takes ownership of rd */
6468         return set_regdom(rd, REGD_SOURCE_CRDA);
6469  bad_reg:
6470         kfree(rd);
6471         return r;
6472 }
6473 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
6474
6475 static int validate_scan_freqs(struct nlattr *freqs)
6476 {
6477         struct nlattr *attr1, *attr2;
6478         int n_channels = 0, tmp1, tmp2;
6479
6480         nla_for_each_nested(attr1, freqs, tmp1)
6481                 if (nla_len(attr1) != sizeof(u32))
6482                         return 0;
6483
6484         nla_for_each_nested(attr1, freqs, tmp1) {
6485                 n_channels++;
6486                 /*
6487                  * Some hardware has a limited channel list for
6488                  * scanning, and it is pretty much nonsensical
6489                  * to scan for a channel twice, so disallow that
6490                  * and don't require drivers to check that the
6491                  * channel list they get isn't longer than what
6492                  * they can scan, as long as they can scan all
6493                  * the channels they registered at once.
6494                  */
6495                 nla_for_each_nested(attr2, freqs, tmp2)
6496                         if (attr1 != attr2 &&
6497                             nla_get_u32(attr1) == nla_get_u32(attr2))
6498                                 return 0;
6499         }
6500
6501         return n_channels;
6502 }
6503
6504 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
6505 {
6506         return b < NUM_NL80211_BANDS && wiphy->bands[b];
6507 }
6508
6509 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
6510                             struct cfg80211_bss_selection *bss_select)
6511 {
6512         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
6513         struct nlattr *nest;
6514         int err;
6515         bool found = false;
6516         int i;
6517
6518         /* only process one nested attribute */
6519         nest = nla_data(nla);
6520         if (!nla_ok(nest, nla_len(nest)))
6521                 return -EINVAL;
6522
6523         err = nla_parse_nested(attr, NL80211_BSS_SELECT_ATTR_MAX, nest,
6524                                nl80211_bss_select_policy, NULL);
6525         if (err)
6526                 return err;
6527
6528         /* only one attribute may be given */
6529         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6530                 if (attr[i]) {
6531                         if (found)
6532                                 return -EINVAL;
6533                         found = true;
6534                 }
6535         }
6536
6537         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6538
6539         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6540                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6541
6542         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6543                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6544                 bss_select->param.band_pref =
6545                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6546                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6547                         return -EINVAL;
6548         }
6549
6550         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6551                 struct nl80211_bss_select_rssi_adjust *adj_param;
6552
6553                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6554                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6555                 bss_select->param.adjust.band = adj_param->band;
6556                 bss_select->param.adjust.delta = adj_param->delta;
6557                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6558                         return -EINVAL;
6559         }
6560
6561         /* user-space did not provide behaviour attribute */
6562         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6563                 return -EINVAL;
6564
6565         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6566                 return -EINVAL;
6567
6568         return 0;
6569 }
6570
6571 static int nl80211_parse_random_mac(struct nlattr **attrs,
6572                                     u8 *mac_addr, u8 *mac_addr_mask)
6573 {
6574         int i;
6575
6576         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6577                 eth_zero_addr(mac_addr);
6578                 eth_zero_addr(mac_addr_mask);
6579                 mac_addr[0] = 0x2;
6580                 mac_addr_mask[0] = 0x3;
6581
6582                 return 0;
6583         }
6584
6585         /* need both or none */
6586         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6587                 return -EINVAL;
6588
6589         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6590         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6591
6592         /* don't allow or configure an mcast address */
6593         if (!is_multicast_ether_addr(mac_addr_mask) ||
6594             is_multicast_ether_addr(mac_addr))
6595                 return -EINVAL;
6596
6597         /*
6598          * allow users to pass a MAC address that has bits set outside
6599          * of the mask, but don't bother drivers with having to deal
6600          * with such bits
6601          */
6602         for (i = 0; i < ETH_ALEN; i++)
6603                 mac_addr[i] &= mac_addr_mask[i];
6604
6605         return 0;
6606 }
6607
6608 static bool cfg80211_off_channel_oper_allowed(struct wireless_dev *wdev)
6609 {
6610         ASSERT_WDEV_LOCK(wdev);
6611
6612         if (!cfg80211_beaconing_iface_active(wdev))
6613                 return true;
6614
6615         if (!(wdev->chandef.chan->flags & IEEE80211_CHAN_RADAR))
6616                 return true;
6617
6618         return regulatory_pre_cac_allowed(wdev->wiphy);
6619 }
6620
6621 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6622 {
6623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6624         struct wireless_dev *wdev = info->user_ptr[1];
6625         struct cfg80211_scan_request *request;
6626         struct nlattr *attr;
6627         struct wiphy *wiphy;
6628         int err, tmp, n_ssids = 0, n_channels, i;
6629         size_t ie_len;
6630
6631         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6632                 return -EINVAL;
6633
6634         wiphy = &rdev->wiphy;
6635
6636         if (wdev->iftype == NL80211_IFTYPE_NAN)
6637                 return -EOPNOTSUPP;
6638
6639         if (!rdev->ops->scan)
6640                 return -EOPNOTSUPP;
6641
6642         if (rdev->scan_req || rdev->scan_msg) {
6643                 err = -EBUSY;
6644                 goto unlock;
6645         }
6646
6647         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6648                 n_channels = validate_scan_freqs(
6649                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6650                 if (!n_channels) {
6651                         err = -EINVAL;
6652                         goto unlock;
6653                 }
6654         } else {
6655                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6656         }
6657
6658         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6659                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6660                         n_ssids++;
6661
6662         if (n_ssids > wiphy->max_scan_ssids) {
6663                 err = -EINVAL;
6664                 goto unlock;
6665         }
6666
6667         if (info->attrs[NL80211_ATTR_IE])
6668                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6669         else
6670                 ie_len = 0;
6671
6672         if (ie_len > wiphy->max_scan_ie_len) {
6673                 err = -EINVAL;
6674                 goto unlock;
6675         }
6676
6677         request = kzalloc(sizeof(*request)
6678                         + sizeof(*request->ssids) * n_ssids
6679                         + sizeof(*request->channels) * n_channels
6680                         + ie_len, GFP_KERNEL);
6681         if (!request) {
6682                 err = -ENOMEM;
6683                 goto unlock;
6684         }
6685
6686         if (n_ssids)
6687                 request->ssids = (void *)&request->channels[n_channels];
6688         request->n_ssids = n_ssids;
6689         if (ie_len) {
6690                 if (n_ssids)
6691                         request->ie = (void *)(request->ssids + n_ssids);
6692                 else
6693                         request->ie = (void *)(request->channels + n_channels);
6694         }
6695
6696         i = 0;
6697         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6698                 /* user specified, bail out if channel not found */
6699                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6700                         struct ieee80211_channel *chan;
6701
6702                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6703
6704                         if (!chan) {
6705                                 err = -EINVAL;
6706                                 goto out_free;
6707                         }
6708
6709                         /* ignore disabled channels */
6710                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6711                                 continue;
6712
6713                         request->channels[i] = chan;
6714                         i++;
6715                 }
6716         } else {
6717                 enum nl80211_band band;
6718
6719                 /* all channels */
6720                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6721                         int j;
6722
6723                         if (!wiphy->bands[band])
6724                                 continue;
6725                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6726                                 struct ieee80211_channel *chan;
6727
6728                                 chan = &wiphy->bands[band]->channels[j];
6729
6730                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6731                                         continue;
6732
6733                                 request->channels[i] = chan;
6734                                 i++;
6735                         }
6736                 }
6737         }
6738
6739         if (!i) {
6740                 err = -EINVAL;
6741                 goto out_free;
6742         }
6743
6744         request->n_channels = i;
6745
6746         wdev_lock(wdev);
6747         if (!cfg80211_off_channel_oper_allowed(wdev)) {
6748                 struct ieee80211_channel *chan;
6749
6750                 if (request->n_channels != 1) {
6751                         wdev_unlock(wdev);
6752                         err = -EBUSY;
6753                         goto out_free;
6754                 }
6755
6756                 chan = request->channels[0];
6757                 if (chan->center_freq != wdev->chandef.chan->center_freq) {
6758                         wdev_unlock(wdev);
6759                         err = -EBUSY;
6760                         goto out_free;
6761                 }
6762         }
6763         wdev_unlock(wdev);
6764
6765         i = 0;
6766         if (n_ssids) {
6767                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6768                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6769                                 err = -EINVAL;
6770                                 goto out_free;
6771                         }
6772                         request->ssids[i].ssid_len = nla_len(attr);
6773                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6774                         i++;
6775                 }
6776         }
6777
6778         if (info->attrs[NL80211_ATTR_IE]) {
6779                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6780                 memcpy((void *)request->ie,
6781                        nla_data(info->attrs[NL80211_ATTR_IE]),
6782                        request->ie_len);
6783         }
6784
6785         for (i = 0; i < NUM_NL80211_BANDS; i++)
6786                 if (wiphy->bands[i])
6787                         request->rates[i] =
6788                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6789
6790         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6791                 nla_for_each_nested(attr,
6792                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6793                                     tmp) {
6794                         enum nl80211_band band = nla_type(attr);
6795
6796                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6797                                 err = -EINVAL;
6798                                 goto out_free;
6799                         }
6800
6801                         if (!wiphy->bands[band])
6802                                 continue;
6803
6804                         err = ieee80211_get_ratemask(wiphy->bands[band],
6805                                                      nla_data(attr),
6806                                                      nla_len(attr),
6807                                                      &request->rates[band]);
6808                         if (err)
6809                                 goto out_free;
6810                 }
6811         }
6812
6813         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6814                 if (!wiphy_ext_feature_isset(wiphy,
6815                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6816                         err = -EOPNOTSUPP;
6817                         goto out_free;
6818                 }
6819
6820                 request->duration =
6821                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6822                 request->duration_mandatory =
6823                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6824         }
6825
6826         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6827                 request->flags = nla_get_u32(
6828                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6829                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6830                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6831                         err = -EOPNOTSUPP;
6832                         goto out_free;
6833                 }
6834
6835                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6836                         if (!(wiphy->features &
6837                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6838                                 err = -EOPNOTSUPP;
6839                                 goto out_free;
6840                         }
6841
6842                         if (wdev->current_bss) {
6843                                 err = -EOPNOTSUPP;
6844                                 goto out_free;
6845                         }
6846
6847                         err = nl80211_parse_random_mac(info->attrs,
6848                                                        request->mac_addr,
6849                                                        request->mac_addr_mask);
6850                         if (err)
6851                                 goto out_free;
6852                 }
6853         }
6854
6855         request->no_cck =
6856                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6857
6858         /* Initial implementation used NL80211_ATTR_MAC to set the specific
6859          * BSSID to scan for. This was problematic because that same attribute
6860          * was already used for another purpose (local random MAC address). The
6861          * NL80211_ATTR_BSSID attribute was added to fix this. For backwards
6862          * compatibility with older userspace components, also use the
6863          * NL80211_ATTR_MAC value here if it can be determined to be used for
6864          * the specific BSSID use case instead of the random MAC address
6865          * (NL80211_ATTR_SCAN_FLAGS is used to enable random MAC address use).
6866          */
6867         if (info->attrs[NL80211_ATTR_BSSID])
6868                 memcpy(request->bssid,
6869                        nla_data(info->attrs[NL80211_ATTR_BSSID]), ETH_ALEN);
6870         else if (!(request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) &&
6871                  info->attrs[NL80211_ATTR_MAC])
6872                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6873                        ETH_ALEN);
6874         else
6875                 eth_broadcast_addr(request->bssid);
6876
6877         request->wdev = wdev;
6878         request->wiphy = &rdev->wiphy;
6879         request->scan_start = jiffies;
6880
6881         rdev->scan_req = request;
6882         err = rdev_scan(rdev, request);
6883
6884         if (!err) {
6885                 nl80211_send_scan_start(rdev, wdev);
6886                 if (wdev->netdev)
6887                         dev_hold(wdev->netdev);
6888         } else {
6889  out_free:
6890                 rdev->scan_req = NULL;
6891                 kfree(request);
6892         }
6893
6894  unlock:
6895         return err;
6896 }
6897
6898 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6899 {
6900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6901         struct wireless_dev *wdev = info->user_ptr[1];
6902
6903         if (!rdev->ops->abort_scan)
6904                 return -EOPNOTSUPP;
6905
6906         if (rdev->scan_msg)
6907                 return 0;
6908
6909         if (!rdev->scan_req)
6910                 return -ENOENT;
6911
6912         rdev_abort_scan(rdev, wdev);
6913         return 0;
6914 }
6915
6916 static int
6917 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6918                                struct cfg80211_sched_scan_request *request,
6919                                struct nlattr **attrs)
6920 {
6921         int tmp, err, i = 0;
6922         struct nlattr *attr;
6923
6924         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6925                 u32 interval;
6926
6927                 /*
6928                  * If scan plans are not specified,
6929                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL will be specified. In this
6930                  * case one scan plan will be set with the specified scan
6931                  * interval and infinite number of iterations.
6932                  */
6933                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6934                 if (!interval)
6935                         return -EINVAL;
6936
6937                 request->scan_plans[0].interval =
6938                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6939                 if (!request->scan_plans[0].interval)
6940                         return -EINVAL;
6941
6942                 if (request->scan_plans[0].interval >
6943                     wiphy->max_sched_scan_plan_interval)
6944                         request->scan_plans[0].interval =
6945                                 wiphy->max_sched_scan_plan_interval;
6946
6947                 return 0;
6948         }
6949
6950         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6951                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6952
6953                 if (WARN_ON(i >= n_plans))
6954                         return -EINVAL;
6955
6956                 err = nla_parse_nested(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6957                                        attr, nl80211_plan_policy, NULL);
6958                 if (err)
6959                         return err;
6960
6961                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6962                         return -EINVAL;
6963
6964                 request->scan_plans[i].interval =
6965                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6966                 if (!request->scan_plans[i].interval ||
6967                     request->scan_plans[i].interval >
6968                     wiphy->max_sched_scan_plan_interval)
6969                         return -EINVAL;
6970
6971                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6972                         request->scan_plans[i].iterations =
6973                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6974                         if (!request->scan_plans[i].iterations ||
6975                             (request->scan_plans[i].iterations >
6976                              wiphy->max_sched_scan_plan_iterations))
6977                                 return -EINVAL;
6978                 } else if (i < n_plans - 1) {
6979                         /*
6980                          * All scan plans but the last one must specify
6981                          * a finite number of iterations
6982                          */
6983                         return -EINVAL;
6984                 }
6985
6986                 i++;
6987         }
6988
6989         /*
6990          * The last scan plan must not specify the number of
6991          * iterations, it is supposed to run infinitely
6992          */
6993         if (request->scan_plans[n_plans - 1].iterations)
6994                 return  -EINVAL;
6995
6996         return 0;
6997 }
6998
6999 static struct cfg80211_sched_scan_request *
7000 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
7001                          struct nlattr **attrs, int max_match_sets)
7002 {
7003         struct cfg80211_sched_scan_request *request;
7004         struct nlattr *attr;
7005         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
7006         enum nl80211_band band;
7007         size_t ie_len;
7008         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
7009         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
7010
7011         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
7012                 return ERR_PTR(-EINVAL);
7013
7014         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
7015                 n_channels = validate_scan_freqs(
7016                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
7017                 if (!n_channels)
7018                         return ERR_PTR(-EINVAL);
7019         } else {
7020                 n_channels = ieee80211_get_num_supported_channels(wiphy);
7021         }
7022
7023         if (attrs[NL80211_ATTR_SCAN_SSIDS])
7024                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
7025                                     tmp)
7026                         n_ssids++;
7027
7028         if (n_ssids > wiphy->max_sched_scan_ssids)
7029                 return ERR_PTR(-EINVAL);
7030
7031         /*
7032          * First, count the number of 'real' matchsets. Due to an issue with
7033          * the old implementation, matchsets containing only the RSSI attribute
7034          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
7035          * RSSI for all matchsets, rather than their own matchset for reporting
7036          * all APs with a strong RSSI. This is needed to be compatible with
7037          * older userspace that treated a matchset with only the RSSI as the
7038          * global RSSI for all other matchsets - if there are other matchsets.
7039          */
7040         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
7041                 nla_for_each_nested(attr,
7042                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
7043                                     tmp) {
7044                         struct nlattr *rssi;
7045
7046                         err = nla_parse_nested(tb,
7047                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
7048                                                attr, nl80211_match_policy,
7049                                                NULL);
7050                         if (err)
7051                                 return ERR_PTR(err);
7052
7053                         /* SSID and BSSID are mutually exclusive */
7054                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] &&
7055                             tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID])
7056                                 return ERR_PTR(-EINVAL);
7057
7058                         /* add other standalone attributes here */
7059                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] ||
7060                             tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID]) {
7061                                 n_match_sets++;
7062                                 continue;
7063                         }
7064                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7065                         if (rssi)
7066                                 default_match_rssi = nla_get_s32(rssi);
7067                 }
7068         }
7069
7070         /* However, if there's no other matchset, add the RSSI one */
7071         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
7072                 n_match_sets = 1;
7073
7074         if (n_match_sets > max_match_sets)
7075                 return ERR_PTR(-EINVAL);
7076
7077         if (attrs[NL80211_ATTR_IE])
7078                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
7079         else
7080                 ie_len = 0;
7081
7082         if (ie_len > wiphy->max_sched_scan_ie_len)
7083                 return ERR_PTR(-EINVAL);
7084
7085         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
7086                 /*
7087                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
7088                  * each scan plan already specifies its own interval
7089                  */
7090                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
7091                         return ERR_PTR(-EINVAL);
7092
7093                 nla_for_each_nested(attr,
7094                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
7095                         n_plans++;
7096         } else {
7097                 /*
7098                  * The scan interval attribute is kept for backward
7099                  * compatibility. If no scan plans are specified and sched scan
7100                  * interval is specified, one scan plan will be set with this
7101                  * scan interval and infinite number of iterations.
7102                  */
7103                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
7104                         return ERR_PTR(-EINVAL);
7105
7106                 n_plans = 1;
7107         }
7108
7109         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
7110                 return ERR_PTR(-EINVAL);
7111
7112         if (!wiphy_ext_feature_isset(
7113                     wiphy, NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI) &&
7114             (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] ||
7115              attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]))
7116                 return ERR_PTR(-EINVAL);
7117
7118         request = kzalloc(sizeof(*request)
7119                         + sizeof(*request->ssids) * n_ssids
7120                         + sizeof(*request->match_sets) * n_match_sets
7121                         + sizeof(*request->scan_plans) * n_plans
7122                         + sizeof(*request->channels) * n_channels
7123                         + ie_len, GFP_KERNEL);
7124         if (!request)
7125                 return ERR_PTR(-ENOMEM);
7126
7127         if (n_ssids)
7128                 request->ssids = (void *)&request->channels[n_channels];
7129         request->n_ssids = n_ssids;
7130         if (ie_len) {
7131                 if (n_ssids)
7132                         request->ie = (void *)(request->ssids + n_ssids);
7133                 else
7134                         request->ie = (void *)(request->channels + n_channels);
7135         }
7136
7137         if (n_match_sets) {
7138                 if (request->ie)
7139                         request->match_sets = (void *)(request->ie + ie_len);
7140                 else if (n_ssids)
7141                         request->match_sets =
7142                                 (void *)(request->ssids + n_ssids);
7143                 else
7144                         request->match_sets =
7145                                 (void *)(request->channels + n_channels);
7146         }
7147         request->n_match_sets = n_match_sets;
7148
7149         if (n_match_sets)
7150                 request->scan_plans = (void *)(request->match_sets +
7151                                                n_match_sets);
7152         else if (request->ie)
7153                 request->scan_plans = (void *)(request->ie + ie_len);
7154         else if (n_ssids)
7155                 request->scan_plans = (void *)(request->ssids + n_ssids);
7156         else
7157                 request->scan_plans = (void *)(request->channels + n_channels);
7158
7159         request->n_scan_plans = n_plans;
7160
7161         i = 0;
7162         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
7163                 /* user specified, bail out if channel not found */
7164                 nla_for_each_nested(attr,
7165                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
7166                                     tmp) {
7167                         struct ieee80211_channel *chan;
7168
7169                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
7170
7171                         if (!chan) {
7172                                 err = -EINVAL;
7173                                 goto out_free;
7174                         }
7175
7176                         /* ignore disabled channels */
7177                         if (chan->flags & IEEE80211_CHAN_DISABLED)
7178                                 continue;
7179
7180                         request->channels[i] = chan;
7181                         i++;
7182                 }
7183         } else {
7184                 /* all channels */
7185                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
7186                         int j;
7187
7188                         if (!wiphy->bands[band])
7189                                 continue;
7190                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
7191                                 struct ieee80211_channel *chan;
7192
7193                                 chan = &wiphy->bands[band]->channels[j];
7194
7195                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
7196                                         continue;
7197
7198                                 request->channels[i] = chan;
7199                                 i++;
7200                         }
7201                 }
7202         }
7203
7204         if (!i) {
7205                 err = -EINVAL;
7206                 goto out_free;
7207         }
7208
7209         request->n_channels = i;
7210
7211         i = 0;
7212         if (n_ssids) {
7213                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
7214                                     tmp) {
7215                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
7216                                 err = -EINVAL;
7217                                 goto out_free;
7218                         }
7219                         request->ssids[i].ssid_len = nla_len(attr);
7220                         memcpy(request->ssids[i].ssid, nla_data(attr),
7221                                nla_len(attr));
7222                         i++;
7223                 }
7224         }
7225
7226         i = 0;
7227         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
7228                 nla_for_each_nested(attr,
7229                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
7230                                     tmp) {
7231                         struct nlattr *ssid, *bssid, *rssi;
7232
7233                         err = nla_parse_nested(tb,
7234                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
7235                                                attr, nl80211_match_policy,
7236                                                NULL);
7237                         if (err)
7238                                 goto out_free;
7239                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
7240                         bssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID];
7241                         if (ssid || bssid) {
7242                                 if (WARN_ON(i >= n_match_sets)) {
7243                                         /* this indicates a programming error,
7244                                          * the loop above should have verified
7245                                          * things properly
7246                                          */
7247                                         err = -EINVAL;
7248                                         goto out_free;
7249                                 }
7250
7251                                 if (ssid) {
7252                                         if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
7253                                                 err = -EINVAL;
7254                                                 goto out_free;
7255                                         }
7256                                         memcpy(request->match_sets[i].ssid.ssid,
7257                                                nla_data(ssid), nla_len(ssid));
7258                                         request->match_sets[i].ssid.ssid_len =
7259                                                 nla_len(ssid);
7260                                 }
7261                                 if (bssid) {
7262                                         if (nla_len(bssid) != ETH_ALEN) {
7263                                                 err = -EINVAL;
7264                                                 goto out_free;
7265                                         }
7266                                         memcpy(request->match_sets[i].bssid,
7267                                                nla_data(bssid), ETH_ALEN);
7268                                 }
7269
7270                                 /* special attribute - old implementation w/a */
7271                                 request->match_sets[i].rssi_thold =
7272                                         default_match_rssi;
7273                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7274                                 if (rssi)
7275                                         request->match_sets[i].rssi_thold =
7276                                                 nla_get_s32(rssi);
7277                         }
7278                         i++;
7279                 }
7280
7281                 /* there was no other matchset, so the RSSI one is alone */
7282                 if (i == 0 && n_match_sets)
7283                         request->match_sets[0].rssi_thold = default_match_rssi;
7284
7285                 request->min_rssi_thold = INT_MAX;
7286                 for (i = 0; i < n_match_sets; i++)
7287                         request->min_rssi_thold =
7288                                 min(request->match_sets[i].rssi_thold,
7289                                     request->min_rssi_thold);
7290         } else {
7291                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
7292         }
7293
7294         if (ie_len) {
7295                 request->ie_len = ie_len;
7296                 memcpy((void *)request->ie,
7297                        nla_data(attrs[NL80211_ATTR_IE]),
7298                        request->ie_len);
7299         }
7300
7301         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
7302                 request->flags = nla_get_u32(
7303                         attrs[NL80211_ATTR_SCAN_FLAGS]);
7304                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
7305                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
7306                         err = -EOPNOTSUPP;
7307                         goto out_free;
7308                 }
7309
7310                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
7311                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
7312
7313                         if (!wdev) /* must be net-detect */
7314                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
7315
7316                         if (!(wiphy->features & flg)) {
7317                                 err = -EOPNOTSUPP;
7318                                 goto out_free;
7319                         }
7320
7321                         if (wdev && wdev->current_bss) {
7322                                 err = -EOPNOTSUPP;
7323                                 goto out_free;
7324                         }
7325
7326                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
7327                                                        request->mac_addr_mask);
7328                         if (err)
7329                                 goto out_free;
7330                 }
7331         }
7332
7333         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
7334                 request->delay =
7335                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
7336
7337         if (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]) {
7338                 request->relative_rssi = nla_get_s8(
7339                         attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]);
7340                 request->relative_rssi_set = true;
7341         }
7342
7343         if (request->relative_rssi_set &&
7344             attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]) {
7345                 struct nl80211_bss_select_rssi_adjust *rssi_adjust;
7346
7347                 rssi_adjust = nla_data(
7348                         attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]);
7349                 request->rssi_adjust.band = rssi_adjust->band;
7350                 request->rssi_adjust.delta = rssi_adjust->delta;
7351                 if (!is_band_valid(wiphy, request->rssi_adjust.band)) {
7352                         err = -EINVAL;
7353                         goto out_free;
7354                 }
7355         }
7356
7357         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
7358         if (err)
7359                 goto out_free;
7360
7361         request->scan_start = jiffies;
7362
7363         return request;
7364
7365 out_free:
7366         kfree(request);
7367         return ERR_PTR(err);
7368 }
7369
7370 static int nl80211_start_sched_scan(struct sk_buff *skb,
7371                                     struct genl_info *info)
7372 {
7373         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7374         struct net_device *dev = info->user_ptr[1];
7375         struct wireless_dev *wdev = dev->ieee80211_ptr;
7376         struct cfg80211_sched_scan_request *sched_scan_req;
7377         bool want_multi;
7378         int err;
7379
7380         if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_start)
7381                 return -EOPNOTSUPP;
7382
7383         want_multi = info->attrs[NL80211_ATTR_SCHED_SCAN_MULTI];
7384         err = cfg80211_sched_scan_req_possible(rdev, want_multi);
7385         if (err)
7386                 return err;
7387
7388         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
7389                                                   info->attrs,
7390                                                   rdev->wiphy.max_match_sets);
7391
7392         err = PTR_ERR_OR_ZERO(sched_scan_req);
7393         if (err)
7394                 goto out_err;
7395
7396         /* leave request id zero for legacy request
7397          * or if driver does not support multi-scheduled scan
7398          */
7399         if (want_multi && rdev->wiphy.max_sched_scan_reqs > 1) {
7400                 while (!sched_scan_req->reqid)
7401                         sched_scan_req->reqid = rdev->wiphy.cookie_counter++;
7402         }
7403
7404         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
7405         if (err)
7406                 goto out_free;
7407
7408         sched_scan_req->dev = dev;
7409         sched_scan_req->wiphy = &rdev->wiphy;
7410
7411         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
7412                 sched_scan_req->owner_nlportid = info->snd_portid;
7413
7414         cfg80211_add_sched_scan_req(rdev, sched_scan_req);
7415
7416         nl80211_send_sched_scan(sched_scan_req, NL80211_CMD_START_SCHED_SCAN);
7417         return 0;
7418
7419 out_free:
7420         kfree(sched_scan_req);
7421 out_err:
7422         return err;
7423 }
7424
7425 static int nl80211_stop_sched_scan(struct sk_buff *skb,
7426                                    struct genl_info *info)
7427 {
7428         struct cfg80211_sched_scan_request *req;
7429         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7430         u64 cookie;
7431
7432         if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_stop)
7433                 return -EOPNOTSUPP;
7434
7435         if (info->attrs[NL80211_ATTR_COOKIE]) {
7436                 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7437                 return __cfg80211_stop_sched_scan(rdev, cookie, false);
7438         }
7439
7440         req = list_first_or_null_rcu(&rdev->sched_scan_req_list,
7441                                      struct cfg80211_sched_scan_request,
7442                                      list);
7443         if (!req || req->reqid ||
7444             (req->owner_nlportid &&
7445              req->owner_nlportid != info->snd_portid))
7446                 return -ENOENT;
7447
7448         return cfg80211_stop_sched_scan_req(rdev, req, false);
7449 }
7450
7451 static int nl80211_start_radar_detection(struct sk_buff *skb,
7452                                          struct genl_info *info)
7453 {
7454         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7455         struct net_device *dev = info->user_ptr[1];
7456         struct wireless_dev *wdev = dev->ieee80211_ptr;
7457         struct cfg80211_chan_def chandef;
7458         enum nl80211_dfs_regions dfs_region;
7459         unsigned int cac_time_ms;
7460         int err;
7461
7462         dfs_region = reg_get_dfs_region(wdev->wiphy);
7463         if (dfs_region == NL80211_DFS_UNSET)
7464                 return -EINVAL;
7465
7466         err = nl80211_parse_chandef(rdev, info, &chandef);
7467         if (err)
7468                 return err;
7469
7470         if (netif_carrier_ok(dev))
7471                 return -EBUSY;
7472
7473         if (wdev->cac_started)
7474                 return -EBUSY;
7475
7476         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
7477                                             wdev->iftype);
7478         if (err < 0)
7479                 return err;
7480
7481         if (err == 0)
7482                 return -EINVAL;
7483
7484         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
7485                 return -EINVAL;
7486
7487         if (!rdev->ops->start_radar_detection)
7488                 return -EOPNOTSUPP;
7489
7490         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
7491         if (WARN_ON(!cac_time_ms))
7492                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
7493
7494         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
7495         if (!err) {
7496                 wdev->chandef = chandef;
7497                 wdev->cac_started = true;
7498                 wdev->cac_start_time = jiffies;
7499                 wdev->cac_time_ms = cac_time_ms;
7500         }
7501         return err;
7502 }
7503
7504 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
7505 {
7506         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7507         struct net_device *dev = info->user_ptr[1];
7508         struct wireless_dev *wdev = dev->ieee80211_ptr;
7509         struct cfg80211_csa_settings params;
7510         /* csa_attrs is defined static to avoid waste of stack size - this
7511          * function is called under RTNL lock, so this should not be a problem.
7512          */
7513         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
7514         int err;
7515         bool need_new_beacon = false;
7516         bool need_handle_dfs_flag = true;
7517         int len, i;
7518         u32 cs_count;
7519
7520         if (!rdev->ops->channel_switch ||
7521             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
7522                 return -EOPNOTSUPP;
7523
7524         switch (dev->ieee80211_ptr->iftype) {
7525         case NL80211_IFTYPE_AP:
7526         case NL80211_IFTYPE_P2P_GO:
7527                 need_new_beacon = true;
7528                 /* For all modes except AP the handle_dfs flag needs to be
7529                  * supplied to tell the kernel that userspace will handle radar
7530                  * events when they happen. Otherwise a switch to a channel
7531                  * requiring DFS will be rejected.
7532                  */
7533                 need_handle_dfs_flag = false;
7534
7535                 /* useless if AP is not running */
7536                 if (!wdev->beacon_interval)
7537                         return -ENOTCONN;
7538                 break;
7539         case NL80211_IFTYPE_ADHOC:
7540                 if (!wdev->ssid_len)
7541                         return -ENOTCONN;
7542                 break;
7543         case NL80211_IFTYPE_MESH_POINT:
7544                 if (!wdev->mesh_id_len)
7545                         return -ENOTCONN;
7546                 break;
7547         default:
7548                 return -EOPNOTSUPP;
7549         }
7550
7551         memset(&params, 0, sizeof(params));
7552
7553         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7554             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
7555                 return -EINVAL;
7556
7557         /* only important for AP, IBSS and mesh create IEs internally */
7558         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
7559                 return -EINVAL;
7560
7561         /* Even though the attribute is u32, the specification says
7562          * u8, so let's make sure we don't overflow.
7563          */
7564         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
7565         if (cs_count > 255)
7566                 return -EINVAL;
7567
7568         params.count = cs_count;
7569
7570         if (!need_new_beacon)
7571                 goto skip_beacons;
7572
7573         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
7574         if (err)
7575                 return err;
7576
7577         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
7578                                info->attrs[NL80211_ATTR_CSA_IES],
7579                                nl80211_policy, info->extack);
7580         if (err)
7581                 return err;
7582
7583         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
7584         if (err)
7585                 return err;
7586
7587         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
7588                 return -EINVAL;
7589
7590         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7591         if (!len || (len % sizeof(u16)))
7592                 return -EINVAL;
7593
7594         params.n_counter_offsets_beacon = len / sizeof(u16);
7595         if (rdev->wiphy.max_num_csa_counters &&
7596             (params.n_counter_offsets_beacon >
7597              rdev->wiphy.max_num_csa_counters))
7598                 return -EINVAL;
7599
7600         params.counter_offsets_beacon =
7601                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7602
7603         /* sanity checks - counters should fit and be the same */
7604         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
7605                 u16 offset = params.counter_offsets_beacon[i];
7606
7607                 if (offset >= params.beacon_csa.tail_len)
7608                         return -EINVAL;
7609
7610                 if (params.beacon_csa.tail[offset] != params.count)
7611                         return -EINVAL;
7612         }
7613
7614         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
7615                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7616                 if (!len || (len % sizeof(u16)))
7617                         return -EINVAL;
7618
7619                 params.n_counter_offsets_presp = len / sizeof(u16);
7620                 if (rdev->wiphy.max_num_csa_counters &&
7621                     (params.n_counter_offsets_presp >
7622                      rdev->wiphy.max_num_csa_counters))
7623                         return -EINVAL;
7624
7625                 params.counter_offsets_presp =
7626                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7627
7628                 /* sanity checks - counters should fit and be the same */
7629                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
7630                         u16 offset = params.counter_offsets_presp[i];
7631
7632                         if (offset >= params.beacon_csa.probe_resp_len)
7633                                 return -EINVAL;
7634
7635                         if (params.beacon_csa.probe_resp[offset] !=
7636                             params.count)
7637                                 return -EINVAL;
7638                 }
7639         }
7640
7641 skip_beacons:
7642         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7643         if (err)
7644                 return err;
7645
7646         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7647                                            wdev->iftype))
7648                 return -EINVAL;
7649
7650         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7651                                             &params.chandef,
7652                                             wdev->iftype);
7653         if (err < 0)
7654                 return err;
7655
7656         if (err > 0) {
7657                 params.radar_required = true;
7658                 if (need_handle_dfs_flag &&
7659                     !nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS])) {
7660                         return -EINVAL;
7661                 }
7662         }
7663
7664         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7665                 params.block_tx = true;
7666
7667         wdev_lock(wdev);
7668         err = rdev_channel_switch(rdev, dev, &params);
7669         wdev_unlock(wdev);
7670
7671         return err;
7672 }
7673
7674 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7675                             u32 seq, int flags,
7676                             struct cfg80211_registered_device *rdev,
7677                             struct wireless_dev *wdev,
7678                             struct cfg80211_internal_bss *intbss)
7679 {
7680         struct cfg80211_bss *res = &intbss->pub;
7681         const struct cfg80211_bss_ies *ies;
7682         void *hdr;
7683         struct nlattr *bss;
7684
7685         ASSERT_WDEV_LOCK(wdev);
7686
7687         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7688                              NL80211_CMD_NEW_SCAN_RESULTS);
7689         if (!hdr)
7690                 return -1;
7691
7692         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7693
7694         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7695                 goto nla_put_failure;
7696         if (wdev->netdev &&
7697             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7698                 goto nla_put_failure;
7699         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7700                               NL80211_ATTR_PAD))
7701                 goto nla_put_failure;
7702
7703         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7704         if (!bss)
7705                 goto nla_put_failure;
7706         if ((!is_zero_ether_addr(res->bssid) &&
7707              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7708                 goto nla_put_failure;
7709
7710         rcu_read_lock();
7711         /* indicate whether we have probe response data or not */
7712         if (rcu_access_pointer(res->proberesp_ies) &&
7713             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7714                 goto fail_unlock_rcu;
7715
7716         /* this pointer prefers to be pointed to probe response data
7717          * but is always valid
7718          */
7719         ies = rcu_dereference(res->ies);
7720         if (ies) {
7721                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7722                                       NL80211_BSS_PAD))
7723                         goto fail_unlock_rcu;
7724                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7725                                         ies->len, ies->data))
7726                         goto fail_unlock_rcu;
7727         }
7728
7729         /* and this pointer is always (unless driver didn't know) beacon data */
7730         ies = rcu_dereference(res->beacon_ies);
7731         if (ies && ies->from_beacon) {
7732                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7733                                       NL80211_BSS_PAD))
7734                         goto fail_unlock_rcu;
7735                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7736                                         ies->len, ies->data))
7737                         goto fail_unlock_rcu;
7738         }
7739         rcu_read_unlock();
7740
7741         if (res->beacon_interval &&
7742             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7743                 goto nla_put_failure;
7744         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7745             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7746             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7747             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7748                         jiffies_to_msecs(jiffies - intbss->ts)))
7749                 goto nla_put_failure;
7750
7751         if (intbss->parent_tsf &&
7752             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7753                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7754              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7755                      intbss->parent_bssid)))
7756                 goto nla_put_failure;
7757
7758         if (intbss->ts_boottime &&
7759             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7760                               intbss->ts_boottime, NL80211_BSS_PAD))
7761                 goto nla_put_failure;
7762
7763         switch (rdev->wiphy.signal_type) {
7764         case CFG80211_SIGNAL_TYPE_MBM:
7765                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7766                         goto nla_put_failure;
7767                 break;
7768         case CFG80211_SIGNAL_TYPE_UNSPEC:
7769                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7770                         goto nla_put_failure;
7771                 break;
7772         default:
7773                 break;
7774         }
7775
7776         switch (wdev->iftype) {
7777         case NL80211_IFTYPE_P2P_CLIENT:
7778         case NL80211_IFTYPE_STATION:
7779                 if (intbss == wdev->current_bss &&
7780                     nla_put_u32(msg, NL80211_BSS_STATUS,
7781                                 NL80211_BSS_STATUS_ASSOCIATED))
7782                         goto nla_put_failure;
7783                 break;
7784         case NL80211_IFTYPE_ADHOC:
7785                 if (intbss == wdev->current_bss &&
7786                     nla_put_u32(msg, NL80211_BSS_STATUS,
7787                                 NL80211_BSS_STATUS_IBSS_JOINED))
7788                         goto nla_put_failure;
7789                 break;
7790         default:
7791                 break;
7792         }
7793
7794         nla_nest_end(msg, bss);
7795
7796         genlmsg_end(msg, hdr);
7797         return 0;
7798
7799  fail_unlock_rcu:
7800         rcu_read_unlock();
7801  nla_put_failure:
7802         genlmsg_cancel(msg, hdr);
7803         return -EMSGSIZE;
7804 }
7805
7806 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7807 {
7808         struct cfg80211_registered_device *rdev;
7809         struct cfg80211_internal_bss *scan;
7810         struct wireless_dev *wdev;
7811         int start = cb->args[2], idx = 0;
7812         int err;
7813
7814         rtnl_lock();
7815         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7816         if (err) {
7817                 rtnl_unlock();
7818                 return err;
7819         }
7820
7821         wdev_lock(wdev);
7822         spin_lock_bh(&rdev->bss_lock);
7823         cfg80211_bss_expire(rdev);
7824
7825         cb->seq = rdev->bss_generation;
7826
7827         list_for_each_entry(scan, &rdev->bss_list, list) {
7828                 if (++idx <= start)
7829                         continue;
7830                 if (nl80211_send_bss(skb, cb,
7831                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7832                                 rdev, wdev, scan) < 0) {
7833                         idx--;
7834                         break;
7835                 }
7836         }
7837
7838         spin_unlock_bh(&rdev->bss_lock);
7839         wdev_unlock(wdev);
7840
7841         cb->args[2] = idx;
7842         rtnl_unlock();
7843
7844         return skb->len;
7845 }
7846
7847 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7848                                int flags, struct net_device *dev,
7849                                bool allow_radio_stats,
7850                                struct survey_info *survey)
7851 {
7852         void *hdr;
7853         struct nlattr *infoattr;
7854
7855         /* skip radio stats if userspace didn't request them */
7856         if (!survey->channel && !allow_radio_stats)
7857                 return 0;
7858
7859         hdr = nl80211hdr_put(msg, portid, seq, flags,
7860                              NL80211_CMD_NEW_SURVEY_RESULTS);
7861         if (!hdr)
7862                 return -ENOMEM;
7863
7864         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7865                 goto nla_put_failure;
7866
7867         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7868         if (!infoattr)
7869                 goto nla_put_failure;
7870
7871         if (survey->channel &&
7872             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7873                         survey->channel->center_freq))
7874                 goto nla_put_failure;
7875
7876         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7877             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7878                 goto nla_put_failure;
7879         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7880             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7881                 goto nla_put_failure;
7882         if ((survey->filled & SURVEY_INFO_TIME) &&
7883             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7884                         survey->time, NL80211_SURVEY_INFO_PAD))
7885                 goto nla_put_failure;
7886         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7887             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7888                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7889                 goto nla_put_failure;
7890         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7891             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7892                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7893                 goto nla_put_failure;
7894         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7895             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7896                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7897                 goto nla_put_failure;
7898         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7899             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7900                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7901                 goto nla_put_failure;
7902         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7903             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7904                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7905                 goto nla_put_failure;
7906
7907         nla_nest_end(msg, infoattr);
7908
7909         genlmsg_end(msg, hdr);
7910         return 0;
7911
7912  nla_put_failure:
7913         genlmsg_cancel(msg, hdr);
7914         return -EMSGSIZE;
7915 }
7916
7917 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7918 {
7919         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
7920         struct survey_info survey;
7921         struct cfg80211_registered_device *rdev;
7922         struct wireless_dev *wdev;
7923         int survey_idx = cb->args[2];
7924         int res;
7925         bool radio_stats;
7926
7927         rtnl_lock();
7928         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7929         if (res)
7930                 goto out_err;
7931
7932         /* prepare_wdev_dump parsed the attributes */
7933         radio_stats = attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7934
7935         if (!wdev->netdev) {
7936                 res = -EINVAL;
7937                 goto out_err;
7938         }
7939
7940         if (!rdev->ops->dump_survey) {
7941                 res = -EOPNOTSUPP;
7942                 goto out_err;
7943         }
7944
7945         while (1) {
7946                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7947                 if (res == -ENOENT)
7948                         break;
7949                 if (res)
7950                         goto out_err;
7951
7952                 /* don't send disabled channels, but do send non-channel data */
7953                 if (survey.channel &&
7954                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7955                         survey_idx++;
7956                         continue;
7957                 }
7958
7959                 if (nl80211_send_survey(skb,
7960                                 NETLINK_CB(cb->skb).portid,
7961                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7962                                 wdev->netdev, radio_stats, &survey) < 0)
7963                         goto out;
7964                 survey_idx++;
7965         }
7966
7967  out:
7968         cb->args[2] = survey_idx;
7969         res = skb->len;
7970  out_err:
7971         rtnl_unlock();
7972         return res;
7973 }
7974
7975 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7976 {
7977         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7978                                   NL80211_WPA_VERSION_2));
7979 }
7980
7981 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7982 {
7983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7984         struct net_device *dev = info->user_ptr[1];
7985         struct ieee80211_channel *chan;
7986         const u8 *bssid, *ssid, *ie = NULL, *auth_data = NULL;
7987         int err, ssid_len, ie_len = 0, auth_data_len = 0;
7988         enum nl80211_auth_type auth_type;
7989         struct key_parse key;
7990         bool local_state_change;
7991
7992         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7993                 return -EINVAL;
7994
7995         if (!info->attrs[NL80211_ATTR_MAC])
7996                 return -EINVAL;
7997
7998         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7999                 return -EINVAL;
8000
8001         if (!info->attrs[NL80211_ATTR_SSID])
8002                 return -EINVAL;
8003
8004         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8005                 return -EINVAL;
8006
8007         err = nl80211_parse_key(info, &key);
8008         if (err)
8009                 return err;
8010
8011         if (key.idx >= 0) {
8012                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
8013                         return -EINVAL;
8014                 if (!key.p.key || !key.p.key_len)
8015                         return -EINVAL;
8016                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
8017                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
8018                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
8019                      key.p.key_len != WLAN_KEY_LEN_WEP104))
8020                         return -EINVAL;
8021                 if (key.idx > 3)
8022                         return -EINVAL;
8023         } else {
8024                 key.p.key_len = 0;
8025                 key.p.key = NULL;
8026         }
8027
8028         if (key.idx >= 0) {
8029                 int i;
8030                 bool ok = false;
8031
8032                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
8033                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
8034                                 ok = true;
8035                                 break;
8036                         }
8037                 }
8038                 if (!ok)
8039                         return -EINVAL;
8040         }
8041
8042         if (!rdev->ops->auth)
8043                 return -EOPNOTSUPP;
8044
8045         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8046             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8047                 return -EOPNOTSUPP;
8048
8049         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8050         chan = nl80211_get_valid_chan(&rdev->wiphy,
8051                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8052         if (!chan)
8053                 return -EINVAL;
8054
8055         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8056         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8057
8058         if (info->attrs[NL80211_ATTR_IE]) {
8059                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8060                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8061         }
8062
8063         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8064         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
8065                 return -EINVAL;
8066
8067         if ((auth_type == NL80211_AUTHTYPE_SAE ||
8068              auth_type == NL80211_AUTHTYPE_FILS_SK ||
8069              auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
8070              auth_type == NL80211_AUTHTYPE_FILS_PK) &&
8071             !info->attrs[NL80211_ATTR_AUTH_DATA])
8072                 return -EINVAL;
8073
8074         if (info->attrs[NL80211_ATTR_AUTH_DATA]) {
8075                 if (auth_type != NL80211_AUTHTYPE_SAE &&
8076                     auth_type != NL80211_AUTHTYPE_FILS_SK &&
8077                     auth_type != NL80211_AUTHTYPE_FILS_SK_PFS &&
8078                     auth_type != NL80211_AUTHTYPE_FILS_PK)
8079                         return -EINVAL;
8080                 auth_data = nla_data(info->attrs[NL80211_ATTR_AUTH_DATA]);
8081                 auth_data_len = nla_len(info->attrs[NL80211_ATTR_AUTH_DATA]);
8082                 /* need to include at least Auth Transaction and Status Code */
8083                 if (auth_data_len < 4)
8084                         return -EINVAL;
8085         }
8086
8087         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8088
8089         /*
8090          * Since we no longer track auth state, ignore
8091          * requests to only change local state.
8092          */
8093         if (local_state_change)
8094                 return 0;
8095
8096         wdev_lock(dev->ieee80211_ptr);
8097         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
8098                                  ssid, ssid_len, ie, ie_len,
8099                                  key.p.key, key.p.key_len, key.idx,
8100                                  auth_data, auth_data_len);
8101         wdev_unlock(dev->ieee80211_ptr);
8102         return err;
8103 }
8104
8105 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
8106                                    struct genl_info *info,
8107                                    struct cfg80211_crypto_settings *settings,
8108                                    int cipher_limit)
8109 {
8110         memset(settings, 0, sizeof(*settings));
8111
8112         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
8113
8114         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
8115                 u16 proto;
8116
8117                 proto = nla_get_u16(
8118                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
8119                 settings->control_port_ethertype = cpu_to_be16(proto);
8120                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
8121                     proto != ETH_P_PAE)
8122                         return -EINVAL;
8123                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
8124                         settings->control_port_no_encrypt = true;
8125         } else
8126                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
8127
8128         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
8129                 void *data;
8130                 int len, i;
8131
8132                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
8133                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
8134                 settings->n_ciphers_pairwise = len / sizeof(u32);
8135
8136                 if (len % sizeof(u32))
8137                         return -EINVAL;
8138
8139                 if (settings->n_ciphers_pairwise > cipher_limit)
8140                         return -EINVAL;
8141
8142                 memcpy(settings->ciphers_pairwise, data, len);
8143
8144                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
8145                         if (!cfg80211_supported_cipher_suite(
8146                                         &rdev->wiphy,
8147                                         settings->ciphers_pairwise[i]))
8148                                 return -EINVAL;
8149         }
8150
8151         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
8152                 settings->cipher_group =
8153                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
8154                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
8155                                                      settings->cipher_group))
8156                         return -EINVAL;
8157         }
8158
8159         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
8160                 settings->wpa_versions =
8161                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
8162                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
8163                         return -EINVAL;
8164         }
8165
8166         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
8167                 void *data;
8168                 int len;
8169
8170                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
8171                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
8172                 settings->n_akm_suites = len / sizeof(u32);
8173
8174                 if (len % sizeof(u32))
8175                         return -EINVAL;
8176
8177                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
8178                         return -EINVAL;
8179
8180                 memcpy(settings->akm_suites, data, len);
8181         }
8182
8183         if (info->attrs[NL80211_ATTR_PMK]) {
8184                 if (nla_len(info->attrs[NL80211_ATTR_PMK]) != WLAN_PMK_LEN)
8185                         return -EINVAL;
8186                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
8187                                              NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK))
8188                         return -EINVAL;
8189                 settings->psk = nla_data(info->attrs[NL80211_ATTR_PMK]);
8190         }
8191
8192         return 0;
8193 }
8194
8195 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
8196 {
8197         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8198         struct net_device *dev = info->user_ptr[1];
8199         struct ieee80211_channel *chan;
8200         struct cfg80211_assoc_request req = {};
8201         const u8 *bssid, *ssid;
8202         int err, ssid_len = 0;
8203
8204         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8205                 return -EINVAL;
8206
8207         if (!info->attrs[NL80211_ATTR_MAC] ||
8208             !info->attrs[NL80211_ATTR_SSID] ||
8209             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
8210                 return -EINVAL;
8211
8212         if (!rdev->ops->assoc)
8213                 return -EOPNOTSUPP;
8214
8215         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8216             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8217                 return -EOPNOTSUPP;
8218
8219         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8220
8221         chan = nl80211_get_valid_chan(&rdev->wiphy,
8222                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8223         if (!chan)
8224                 return -EINVAL;
8225
8226         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8227         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8228
8229         if (info->attrs[NL80211_ATTR_IE]) {
8230                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8231                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8232         }
8233
8234         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8235                 enum nl80211_mfp mfp =
8236                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8237                 if (mfp == NL80211_MFP_REQUIRED)
8238                         req.use_mfp = true;
8239                 else if (mfp != NL80211_MFP_NO)
8240                         return -EINVAL;
8241         }
8242
8243         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8244                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8245
8246         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8247                 req.flags |= ASSOC_REQ_DISABLE_HT;
8248
8249         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8250                 memcpy(&req.ht_capa_mask,
8251                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8252                        sizeof(req.ht_capa_mask));
8253
8254         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8255                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8256                         return -EINVAL;
8257                 memcpy(&req.ht_capa,
8258                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8259                        sizeof(req.ht_capa));
8260         }
8261
8262         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8263                 req.flags |= ASSOC_REQ_DISABLE_VHT;
8264
8265         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8266                 memcpy(&req.vht_capa_mask,
8267                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8268                        sizeof(req.vht_capa_mask));
8269
8270         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8271                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8272                         return -EINVAL;
8273                 memcpy(&req.vht_capa,
8274                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8275                        sizeof(req.vht_capa));
8276         }
8277
8278         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8279                 if (!((rdev->wiphy.features &
8280                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8281                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8282                     !wiphy_ext_feature_isset(&rdev->wiphy,
8283                                              NL80211_EXT_FEATURE_RRM))
8284                         return -EINVAL;
8285                 req.flags |= ASSOC_REQ_USE_RRM;
8286         }
8287
8288         if (info->attrs[NL80211_ATTR_FILS_KEK]) {
8289                 req.fils_kek = nla_data(info->attrs[NL80211_ATTR_FILS_KEK]);
8290                 req.fils_kek_len = nla_len(info->attrs[NL80211_ATTR_FILS_KEK]);
8291                 if (!info->attrs[NL80211_ATTR_FILS_NONCES])
8292                         return -EINVAL;
8293                 req.fils_nonces =
8294                         nla_data(info->attrs[NL80211_ATTR_FILS_NONCES]);
8295         }
8296
8297         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
8298         if (!err) {
8299                 wdev_lock(dev->ieee80211_ptr);
8300
8301                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
8302                                           ssid, ssid_len, &req);
8303
8304                 if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
8305                         dev->ieee80211_ptr->conn_owner_nlportid =
8306                                 info->snd_portid;
8307                         memcpy(dev->ieee80211_ptr->disconnect_bssid,
8308                                bssid, ETH_ALEN);
8309                 }
8310
8311                 wdev_unlock(dev->ieee80211_ptr);
8312         }
8313
8314         return err;
8315 }
8316
8317 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
8318 {
8319         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8320         struct net_device *dev = info->user_ptr[1];
8321         const u8 *ie = NULL, *bssid;
8322         int ie_len = 0, err;
8323         u16 reason_code;
8324         bool local_state_change;
8325
8326         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8327                 return -EINVAL;
8328
8329         if (!info->attrs[NL80211_ATTR_MAC])
8330                 return -EINVAL;
8331
8332         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8333                 return -EINVAL;
8334
8335         if (!rdev->ops->deauth)
8336                 return -EOPNOTSUPP;
8337
8338         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8339             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8340                 return -EOPNOTSUPP;
8341
8342         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8343
8344         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8345         if (reason_code == 0) {
8346                 /* Reason Code 0 is reserved */
8347                 return -EINVAL;
8348         }
8349
8350         if (info->attrs[NL80211_ATTR_IE]) {
8351                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8352                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8353         }
8354
8355         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8356
8357         wdev_lock(dev->ieee80211_ptr);
8358         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
8359                                    local_state_change);
8360         wdev_unlock(dev->ieee80211_ptr);
8361         return err;
8362 }
8363
8364 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
8365 {
8366         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8367         struct net_device *dev = info->user_ptr[1];
8368         const u8 *ie = NULL, *bssid;
8369         int ie_len = 0, err;
8370         u16 reason_code;
8371         bool local_state_change;
8372
8373         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8374                 return -EINVAL;
8375
8376         if (!info->attrs[NL80211_ATTR_MAC])
8377                 return -EINVAL;
8378
8379         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8380                 return -EINVAL;
8381
8382         if (!rdev->ops->disassoc)
8383                 return -EOPNOTSUPP;
8384
8385         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8386             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8387                 return -EOPNOTSUPP;
8388
8389         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8390
8391         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8392         if (reason_code == 0) {
8393                 /* Reason Code 0 is reserved */
8394                 return -EINVAL;
8395         }
8396
8397         if (info->attrs[NL80211_ATTR_IE]) {
8398                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8399                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8400         }
8401
8402         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8403
8404         wdev_lock(dev->ieee80211_ptr);
8405         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
8406                                      local_state_change);
8407         wdev_unlock(dev->ieee80211_ptr);
8408         return err;
8409 }
8410
8411 static bool
8412 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
8413                          int mcast_rate[NUM_NL80211_BANDS],
8414                          int rateval)
8415 {
8416         struct wiphy *wiphy = &rdev->wiphy;
8417         bool found = false;
8418         int band, i;
8419
8420         for (band = 0; band < NUM_NL80211_BANDS; band++) {
8421                 struct ieee80211_supported_band *sband;
8422
8423                 sband = wiphy->bands[band];
8424                 if (!sband)
8425                         continue;
8426
8427                 for (i = 0; i < sband->n_bitrates; i++) {
8428                         if (sband->bitrates[i].bitrate == rateval) {
8429                                 mcast_rate[band] = i + 1;
8430                                 found = true;
8431                                 break;
8432                         }
8433                 }
8434         }
8435
8436         return found;
8437 }
8438
8439 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
8440 {
8441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8442         struct net_device *dev = info->user_ptr[1];
8443         struct cfg80211_ibss_params ibss;
8444         struct wiphy *wiphy;
8445         struct cfg80211_cached_keys *connkeys = NULL;
8446         int err;
8447
8448         memset(&ibss, 0, sizeof(ibss));
8449
8450         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8451                 return -EINVAL;
8452
8453         if (!info->attrs[NL80211_ATTR_SSID] ||
8454             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8455                 return -EINVAL;
8456
8457         ibss.beacon_interval = 100;
8458
8459         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
8460                 ibss.beacon_interval =
8461                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8462
8463         err = cfg80211_validate_beacon_int(rdev, NL80211_IFTYPE_ADHOC,
8464                                            ibss.beacon_interval);
8465         if (err)
8466                 return err;
8467
8468         if (!rdev->ops->join_ibss)
8469                 return -EOPNOTSUPP;
8470
8471         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8472                 return -EOPNOTSUPP;
8473
8474         wiphy = &rdev->wiphy;
8475
8476         if (info->attrs[NL80211_ATTR_MAC]) {
8477                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8478
8479                 if (!is_valid_ether_addr(ibss.bssid))
8480                         return -EINVAL;
8481         }
8482         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8483         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8484
8485         if (info->attrs[NL80211_ATTR_IE]) {
8486                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8487                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8488         }
8489
8490         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
8491         if (err)
8492                 return err;
8493
8494         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
8495                                      NL80211_IFTYPE_ADHOC))
8496                 return -EINVAL;
8497
8498         switch (ibss.chandef.width) {
8499         case NL80211_CHAN_WIDTH_5:
8500         case NL80211_CHAN_WIDTH_10:
8501         case NL80211_CHAN_WIDTH_20_NOHT:
8502                 break;
8503         case NL80211_CHAN_WIDTH_20:
8504         case NL80211_CHAN_WIDTH_40:
8505                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8506                         return -EINVAL;
8507                 break;
8508         case NL80211_CHAN_WIDTH_80:
8509         case NL80211_CHAN_WIDTH_80P80:
8510         case NL80211_CHAN_WIDTH_160:
8511                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8512                         return -EINVAL;
8513                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
8514                                              NL80211_EXT_FEATURE_VHT_IBSS))
8515                         return -EINVAL;
8516                 break;
8517         default:
8518                 return -EINVAL;
8519         }
8520
8521         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
8522         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
8523
8524         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8525                 u8 *rates =
8526                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8527                 int n_rates =
8528                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8529                 struct ieee80211_supported_band *sband =
8530                         wiphy->bands[ibss.chandef.chan->band];
8531
8532                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8533                                              &ibss.basic_rates);
8534                 if (err)
8535                         return err;
8536         }
8537
8538         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8539                 memcpy(&ibss.ht_capa_mask,
8540                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8541                        sizeof(ibss.ht_capa_mask));
8542
8543         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8544                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8545                         return -EINVAL;
8546                 memcpy(&ibss.ht_capa,
8547                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8548                        sizeof(ibss.ht_capa));
8549         }
8550
8551         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8552             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
8553                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8554                 return -EINVAL;
8555
8556         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8557                 bool no_ht = false;
8558
8559                 connkeys = nl80211_parse_connkeys(rdev,
8560                                           info->attrs[NL80211_ATTR_KEYS],
8561                                           &no_ht);
8562                 if (IS_ERR(connkeys))
8563                         return PTR_ERR(connkeys);
8564
8565                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
8566                     no_ht) {
8567                         kzfree(connkeys);
8568                         return -EINVAL;
8569                 }
8570         }
8571
8572         ibss.control_port =
8573                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
8574
8575         ibss.userspace_handles_dfs =
8576                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
8577
8578         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
8579         if (err)
8580                 kzfree(connkeys);
8581         return err;
8582 }
8583
8584 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
8585 {
8586         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8587         struct net_device *dev = info->user_ptr[1];
8588
8589         if (!rdev->ops->leave_ibss)
8590                 return -EOPNOTSUPP;
8591
8592         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8593                 return -EOPNOTSUPP;
8594
8595         return cfg80211_leave_ibss(rdev, dev, false);
8596 }
8597
8598 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
8599 {
8600         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8601         struct net_device *dev = info->user_ptr[1];
8602         int mcast_rate[NUM_NL80211_BANDS];
8603         u32 nla_rate;
8604         int err;
8605
8606         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
8607             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
8608             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
8609                 return -EOPNOTSUPP;
8610
8611         if (!rdev->ops->set_mcast_rate)
8612                 return -EOPNOTSUPP;
8613
8614         memset(mcast_rate, 0, sizeof(mcast_rate));
8615
8616         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
8617                 return -EINVAL;
8618
8619         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
8620         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
8621                 return -EINVAL;
8622
8623         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
8624
8625         return err;
8626 }
8627
8628 static struct sk_buff *
8629 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
8630                             struct wireless_dev *wdev, int approxlen,
8631                             u32 portid, u32 seq, enum nl80211_commands cmd,
8632                             enum nl80211_attrs attr,
8633                             const struct nl80211_vendor_cmd_info *info,
8634                             gfp_t gfp)
8635 {
8636         struct sk_buff *skb;
8637         void *hdr;
8638         struct nlattr *data;
8639
8640         skb = nlmsg_new(approxlen + 100, gfp);
8641         if (!skb)
8642                 return NULL;
8643
8644         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
8645         if (!hdr) {
8646                 kfree_skb(skb);
8647                 return NULL;
8648         }
8649
8650         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
8651                 goto nla_put_failure;
8652
8653         if (info) {
8654                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
8655                                 info->vendor_id))
8656                         goto nla_put_failure;
8657                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
8658                                 info->subcmd))
8659                         goto nla_put_failure;
8660         }
8661
8662         if (wdev) {
8663                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
8664                                       wdev_id(wdev), NL80211_ATTR_PAD))
8665                         goto nla_put_failure;
8666                 if (wdev->netdev &&
8667                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
8668                                 wdev->netdev->ifindex))
8669                         goto nla_put_failure;
8670         }
8671
8672         data = nla_nest_start(skb, attr);
8673         if (!data)
8674                 goto nla_put_failure;
8675
8676         ((void **)skb->cb)[0] = rdev;
8677         ((void **)skb->cb)[1] = hdr;
8678         ((void **)skb->cb)[2] = data;
8679
8680         return skb;
8681
8682  nla_put_failure:
8683         kfree_skb(skb);
8684         return NULL;
8685 }
8686
8687 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8688                                            struct wireless_dev *wdev,
8689                                            enum nl80211_commands cmd,
8690                                            enum nl80211_attrs attr,
8691                                            int vendor_event_idx,
8692                                            int approxlen, gfp_t gfp)
8693 {
8694         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8695         const struct nl80211_vendor_cmd_info *info;
8696
8697         switch (cmd) {
8698         case NL80211_CMD_TESTMODE:
8699                 if (WARN_ON(vendor_event_idx != -1))
8700                         return NULL;
8701                 info = NULL;
8702                 break;
8703         case NL80211_CMD_VENDOR:
8704                 if (WARN_ON(vendor_event_idx < 0 ||
8705                             vendor_event_idx >= wiphy->n_vendor_events))
8706                         return NULL;
8707                 info = &wiphy->vendor_events[vendor_event_idx];
8708                 break;
8709         default:
8710                 WARN_ON(1);
8711                 return NULL;
8712         }
8713
8714         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8715                                            cmd, attr, info, gfp);
8716 }
8717 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8718
8719 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8720 {
8721         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8722         void *hdr = ((void **)skb->cb)[1];
8723         struct nlattr *data = ((void **)skb->cb)[2];
8724         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8725
8726         /* clear CB data for netlink core to own from now on */
8727         memset(skb->cb, 0, sizeof(skb->cb));
8728
8729         nla_nest_end(skb, data);
8730         genlmsg_end(skb, hdr);
8731
8732         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8733                 mcgrp = NL80211_MCGRP_VENDOR;
8734
8735         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8736                                 mcgrp, gfp);
8737 }
8738 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8739
8740 #ifdef CONFIG_NL80211_TESTMODE
8741 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8742 {
8743         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8744         struct wireless_dev *wdev =
8745                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8746         int err;
8747
8748         if (!rdev->ops->testmode_cmd)
8749                 return -EOPNOTSUPP;
8750
8751         if (IS_ERR(wdev)) {
8752                 err = PTR_ERR(wdev);
8753                 if (err != -EINVAL)
8754                         return err;
8755                 wdev = NULL;
8756         } else if (wdev->wiphy != &rdev->wiphy) {
8757                 return -EINVAL;
8758         }
8759
8760         if (!info->attrs[NL80211_ATTR_TESTDATA])
8761                 return -EINVAL;
8762
8763         rdev->cur_cmd_info = info;
8764         err = rdev_testmode_cmd(rdev, wdev,
8765                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8766                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8767         rdev->cur_cmd_info = NULL;
8768
8769         return err;
8770 }
8771
8772 static int nl80211_testmode_dump(struct sk_buff *skb,
8773                                  struct netlink_callback *cb)
8774 {
8775         struct cfg80211_registered_device *rdev;
8776         int err;
8777         long phy_idx;
8778         void *data = NULL;
8779         int data_len = 0;
8780
8781         rtnl_lock();
8782
8783         if (cb->args[0]) {
8784                 /*
8785                  * 0 is a valid index, but not valid for args[0],
8786                  * so we need to offset by 1.
8787                  */
8788                 phy_idx = cb->args[0] - 1;
8789
8790                 rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8791                 if (!rdev) {
8792                         err = -ENOENT;
8793                         goto out_err;
8794                 }
8795         } else {
8796                 struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
8797
8798                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8799                                   attrbuf, nl80211_fam.maxattr,
8800                                   nl80211_policy, NULL);
8801                 if (err)
8802                         goto out_err;
8803
8804                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
8805                 if (IS_ERR(rdev)) {
8806                         err = PTR_ERR(rdev);
8807                         goto out_err;
8808                 }
8809                 phy_idx = rdev->wiphy_idx;
8810
8811                 if (attrbuf[NL80211_ATTR_TESTDATA])
8812                         cb->args[1] = (long)attrbuf[NL80211_ATTR_TESTDATA];
8813         }
8814
8815         if (cb->args[1]) {
8816                 data = nla_data((void *)cb->args[1]);
8817                 data_len = nla_len((void *)cb->args[1]);
8818         }
8819
8820         if (!rdev->ops->testmode_dump) {
8821                 err = -EOPNOTSUPP;
8822                 goto out_err;
8823         }
8824
8825         while (1) {
8826                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8827                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8828                                            NL80211_CMD_TESTMODE);
8829                 struct nlattr *tmdata;
8830
8831                 if (!hdr)
8832                         break;
8833
8834                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8835                         genlmsg_cancel(skb, hdr);
8836                         break;
8837                 }
8838
8839                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8840                 if (!tmdata) {
8841                         genlmsg_cancel(skb, hdr);
8842                         break;
8843                 }
8844                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8845                 nla_nest_end(skb, tmdata);
8846
8847                 if (err == -ENOBUFS || err == -ENOENT) {
8848                         genlmsg_cancel(skb, hdr);
8849                         break;
8850                 } else if (err) {
8851                         genlmsg_cancel(skb, hdr);
8852                         goto out_err;
8853                 }
8854
8855                 genlmsg_end(skb, hdr);
8856         }
8857
8858         err = skb->len;
8859         /* see above */
8860         cb->args[0] = phy_idx + 1;
8861  out_err:
8862         rtnl_unlock();
8863         return err;
8864 }
8865 #endif
8866
8867 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8868 {
8869         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8870         struct net_device *dev = info->user_ptr[1];
8871         struct cfg80211_connect_params connect;
8872         struct wiphy *wiphy;
8873         struct cfg80211_cached_keys *connkeys = NULL;
8874         int err;
8875
8876         memset(&connect, 0, sizeof(connect));
8877
8878         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8879                 return -EINVAL;
8880
8881         if (!info->attrs[NL80211_ATTR_SSID] ||
8882             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8883                 return -EINVAL;
8884
8885         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8886                 connect.auth_type =
8887                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8888                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8889                                              NL80211_CMD_CONNECT))
8890                         return -EINVAL;
8891         } else
8892                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8893
8894         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8895
8896         if (info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS] &&
8897             !wiphy_ext_feature_isset(&rdev->wiphy,
8898                                      NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
8899                 return -EINVAL;
8900         connect.want_1x = info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS];
8901
8902         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8903                                       NL80211_MAX_NR_CIPHER_SUITES);
8904         if (err)
8905                 return err;
8906
8907         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8908             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8909                 return -EOPNOTSUPP;
8910
8911         wiphy = &rdev->wiphy;
8912
8913         connect.bg_scan_period = -1;
8914         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8915                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8916                 connect.bg_scan_period =
8917                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8918         }
8919
8920         if (info->attrs[NL80211_ATTR_MAC])
8921                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8922         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8923                 connect.bssid_hint =
8924                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8925         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8926         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8927
8928         if (info->attrs[NL80211_ATTR_IE]) {
8929                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8930                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8931         }
8932
8933         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8934                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8935                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8936                     connect.mfp != NL80211_MFP_NO)
8937                         return -EINVAL;
8938         } else {
8939                 connect.mfp = NL80211_MFP_NO;
8940         }
8941
8942         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8943                 connect.prev_bssid =
8944                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8945
8946         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8947                 connect.channel = nl80211_get_valid_chan(
8948                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8949                 if (!connect.channel)
8950                         return -EINVAL;
8951         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8952                 connect.channel_hint = nl80211_get_valid_chan(
8953                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8954                 if (!connect.channel_hint)
8955                         return -EINVAL;
8956         }
8957
8958         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8959                 connkeys = nl80211_parse_connkeys(rdev,
8960                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8961                 if (IS_ERR(connkeys))
8962                         return PTR_ERR(connkeys);
8963         }
8964
8965         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8966                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8967
8968         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8969                 memcpy(&connect.ht_capa_mask,
8970                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8971                        sizeof(connect.ht_capa_mask));
8972
8973         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8974                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8975                         kzfree(connkeys);
8976                         return -EINVAL;
8977                 }
8978                 memcpy(&connect.ht_capa,
8979                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8980                        sizeof(connect.ht_capa));
8981         }
8982
8983         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8984                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8985
8986         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8987                 memcpy(&connect.vht_capa_mask,
8988                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8989                        sizeof(connect.vht_capa_mask));
8990
8991         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8992                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8993                         kzfree(connkeys);
8994                         return -EINVAL;
8995                 }
8996                 memcpy(&connect.vht_capa,
8997                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8998                        sizeof(connect.vht_capa));
8999         }
9000
9001         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
9002                 if (!((rdev->wiphy.features &
9003                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
9004                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
9005                     !wiphy_ext_feature_isset(&rdev->wiphy,
9006                                              NL80211_EXT_FEATURE_RRM)) {
9007                         kzfree(connkeys);
9008                         return -EINVAL;
9009                 }
9010                 connect.flags |= ASSOC_REQ_USE_RRM;
9011         }
9012
9013         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
9014         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
9015                 kzfree(connkeys);
9016                 return -EOPNOTSUPP;
9017         }
9018
9019         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
9020                 /* bss selection makes no sense if bssid is set */
9021                 if (connect.bssid) {
9022                         kzfree(connkeys);
9023                         return -EINVAL;
9024                 }
9025
9026                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
9027                                        wiphy, &connect.bss_select);
9028                 if (err) {
9029                         kzfree(connkeys);
9030                         return err;
9031                 }
9032         }
9033
9034         if (wiphy_ext_feature_isset(&rdev->wiphy,
9035                                     NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
9036             info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] &&
9037             info->attrs[NL80211_ATTR_FILS_ERP_REALM] &&
9038             info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] &&
9039             info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
9040                 connect.fils_erp_username =
9041                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
9042                 connect.fils_erp_username_len =
9043                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
9044                 connect.fils_erp_realm =
9045                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
9046                 connect.fils_erp_realm_len =
9047                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
9048                 connect.fils_erp_next_seq_num =
9049                         nla_get_u16(
9050                            info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM]);
9051                 connect.fils_erp_rrk =
9052                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
9053                 connect.fils_erp_rrk_len =
9054                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
9055         } else if (info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] ||
9056                    info->attrs[NL80211_ATTR_FILS_ERP_REALM] ||
9057                    info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] ||
9058                    info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
9059                 kzfree(connkeys);
9060                 return -EINVAL;
9061         }
9062
9063         wdev_lock(dev->ieee80211_ptr);
9064
9065         err = cfg80211_connect(rdev, dev, &connect, connkeys,
9066                                connect.prev_bssid);
9067         if (err)
9068                 kzfree(connkeys);
9069
9070         if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
9071                 dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;
9072                 if (connect.bssid)
9073                         memcpy(dev->ieee80211_ptr->disconnect_bssid,
9074                                connect.bssid, ETH_ALEN);
9075                 else
9076                         memset(dev->ieee80211_ptr->disconnect_bssid,
9077                                0, ETH_ALEN);
9078         }
9079
9080         wdev_unlock(dev->ieee80211_ptr);
9081
9082         return err;
9083 }
9084
9085 static int nl80211_update_connect_params(struct sk_buff *skb,
9086                                          struct genl_info *info)
9087 {
9088         struct cfg80211_connect_params connect = {};
9089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9090         struct net_device *dev = info->user_ptr[1];
9091         struct wireless_dev *wdev = dev->ieee80211_ptr;
9092         u32 changed = 0;
9093         int ret;
9094
9095         if (!rdev->ops->update_connect_params)
9096                 return -EOPNOTSUPP;
9097
9098         if (info->attrs[NL80211_ATTR_IE]) {
9099                 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9100                         return -EINVAL;
9101                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9102                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9103                 changed |= UPDATE_ASSOC_IES;
9104         }
9105
9106         wdev_lock(dev->ieee80211_ptr);
9107         if (!wdev->current_bss)
9108                 ret = -ENOLINK;
9109         else
9110                 ret = rdev_update_connect_params(rdev, dev, &connect, changed);
9111         wdev_unlock(dev->ieee80211_ptr);
9112
9113         return ret;
9114 }
9115
9116 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
9117 {
9118         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9119         struct net_device *dev = info->user_ptr[1];
9120         u16 reason;
9121         int ret;
9122
9123         if (!info->attrs[NL80211_ATTR_REASON_CODE])
9124                 reason = WLAN_REASON_DEAUTH_LEAVING;
9125         else
9126                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
9127
9128         if (reason == 0)
9129                 return -EINVAL;
9130
9131         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9132             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9133                 return -EOPNOTSUPP;
9134
9135         wdev_lock(dev->ieee80211_ptr);
9136         ret = cfg80211_disconnect(rdev, dev, reason, true);
9137         wdev_unlock(dev->ieee80211_ptr);
9138         return ret;
9139 }
9140
9141 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
9142 {
9143         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9144         struct net *net;
9145         int err;
9146
9147         if (info->attrs[NL80211_ATTR_PID]) {
9148                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
9149
9150                 net = get_net_ns_by_pid(pid);
9151         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
9152                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
9153
9154                 net = get_net_ns_by_fd(fd);
9155         } else {
9156                 return -EINVAL;
9157         }
9158
9159         if (IS_ERR(net))
9160                 return PTR_ERR(net);
9161
9162         err = 0;
9163
9164         /* check if anything to do */
9165         if (!net_eq(wiphy_net(&rdev->wiphy), net))
9166                 err = cfg80211_switch_netns(rdev, net);
9167
9168         put_net(net);
9169         return err;
9170 }
9171
9172 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
9173 {
9174         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9175         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
9176                         struct cfg80211_pmksa *pmksa) = NULL;
9177         struct net_device *dev = info->user_ptr[1];
9178         struct cfg80211_pmksa pmksa;
9179
9180         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
9181
9182         if (!info->attrs[NL80211_ATTR_PMKID])
9183                 return -EINVAL;
9184
9185         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
9186
9187         if (info->attrs[NL80211_ATTR_MAC]) {
9188                 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
9189         } else if (info->attrs[NL80211_ATTR_SSID] &&
9190                    info->attrs[NL80211_ATTR_FILS_CACHE_ID] &&
9191                    (info->genlhdr->cmd == NL80211_CMD_DEL_PMKSA ||
9192                     info->attrs[NL80211_ATTR_PMK])) {
9193                 pmksa.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
9194                 pmksa.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
9195                 pmksa.cache_id =
9196                         nla_data(info->attrs[NL80211_ATTR_FILS_CACHE_ID]);
9197         } else {
9198                 return -EINVAL;
9199         }
9200         if (info->attrs[NL80211_ATTR_PMK]) {
9201                 pmksa.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
9202                 pmksa.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
9203         }
9204
9205         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9206             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9207                 return -EOPNOTSUPP;
9208
9209         switch (info->genlhdr->cmd) {
9210         case NL80211_CMD_SET_PMKSA:
9211                 rdev_ops = rdev->ops->set_pmksa;
9212                 break;
9213         case NL80211_CMD_DEL_PMKSA:
9214                 rdev_ops = rdev->ops->del_pmksa;
9215                 break;
9216         default:
9217                 WARN_ON(1);
9218                 break;
9219         }
9220
9221         if (!rdev_ops)
9222                 return -EOPNOTSUPP;
9223
9224         return rdev_ops(&rdev->wiphy, dev, &pmksa);
9225 }
9226
9227 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
9228 {
9229         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9230         struct net_device *dev = info->user_ptr[1];
9231
9232         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9233             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9234                 return -EOPNOTSUPP;
9235
9236         if (!rdev->ops->flush_pmksa)
9237                 return -EOPNOTSUPP;
9238
9239         return rdev_flush_pmksa(rdev, dev);
9240 }
9241
9242 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
9243 {
9244         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9245         struct net_device *dev = info->user_ptr[1];
9246         u8 action_code, dialog_token;
9247         u32 peer_capability = 0;
9248         u16 status_code;
9249         u8 *peer;
9250         bool initiator;
9251
9252         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
9253             !rdev->ops->tdls_mgmt)
9254                 return -EOPNOTSUPP;
9255
9256         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
9257             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
9258             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
9259             !info->attrs[NL80211_ATTR_IE] ||
9260             !info->attrs[NL80211_ATTR_MAC])
9261                 return -EINVAL;
9262
9263         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9264         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
9265         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
9266         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
9267         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
9268         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
9269                 peer_capability =
9270                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
9271
9272         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
9273                               dialog_token, status_code, peer_capability,
9274                               initiator,
9275                               nla_data(info->attrs[NL80211_ATTR_IE]),
9276                               nla_len(info->attrs[NL80211_ATTR_IE]));
9277 }
9278
9279 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
9280 {
9281         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9282         struct net_device *dev = info->user_ptr[1];
9283         enum nl80211_tdls_operation operation;
9284         u8 *peer;
9285
9286         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
9287             !rdev->ops->tdls_oper)
9288                 return -EOPNOTSUPP;
9289
9290         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
9291             !info->attrs[NL80211_ATTR_MAC])
9292                 return -EINVAL;
9293
9294         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
9295         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9296
9297         return rdev_tdls_oper(rdev, dev, peer, operation);
9298 }
9299
9300 static int nl80211_remain_on_channel(struct sk_buff *skb,
9301                                      struct genl_info *info)
9302 {
9303         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9304         struct wireless_dev *wdev = info->user_ptr[1];
9305         struct cfg80211_chan_def chandef;
9306         const struct cfg80211_chan_def *compat_chandef;
9307         struct sk_buff *msg;
9308         void *hdr;
9309         u64 cookie;
9310         u32 duration;
9311         int err;
9312
9313         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
9314             !info->attrs[NL80211_ATTR_DURATION])
9315                 return -EINVAL;
9316
9317         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9318
9319         if (!rdev->ops->remain_on_channel ||
9320             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
9321                 return -EOPNOTSUPP;
9322
9323         /*
9324          * We should be on that channel for at least a minimum amount of
9325          * time (10ms) but no longer than the driver supports.
9326          */
9327         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9328             duration > rdev->wiphy.max_remain_on_channel_duration)
9329                 return -EINVAL;
9330
9331         err = nl80211_parse_chandef(rdev, info, &chandef);
9332         if (err)
9333                 return err;
9334
9335         wdev_lock(wdev);
9336         if (!cfg80211_off_channel_oper_allowed(wdev) &&
9337             !cfg80211_chandef_identical(&wdev->chandef, &chandef)) {
9338                 compat_chandef = cfg80211_chandef_compatible(&wdev->chandef,
9339                                                              &chandef);
9340                 if (compat_chandef != &chandef) {
9341                         wdev_unlock(wdev);
9342                         return -EBUSY;
9343                 }
9344         }
9345         wdev_unlock(wdev);
9346
9347         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9348         if (!msg)
9349                 return -ENOMEM;
9350
9351         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9352                              NL80211_CMD_REMAIN_ON_CHANNEL);
9353         if (!hdr) {
9354                 err = -ENOBUFS;
9355                 goto free_msg;
9356         }
9357
9358         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
9359                                      duration, &cookie);
9360
9361         if (err)
9362                 goto free_msg;
9363
9364         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9365                               NL80211_ATTR_PAD))
9366                 goto nla_put_failure;
9367
9368         genlmsg_end(msg, hdr);
9369
9370         return genlmsg_reply(msg, info);
9371
9372  nla_put_failure:
9373         err = -ENOBUFS;
9374  free_msg:
9375         nlmsg_free(msg);
9376         return err;
9377 }
9378
9379 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
9380                                             struct genl_info *info)
9381 {
9382         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9383         struct wireless_dev *wdev = info->user_ptr[1];
9384         u64 cookie;
9385
9386         if (!info->attrs[NL80211_ATTR_COOKIE])
9387                 return -EINVAL;
9388
9389         if (!rdev->ops->cancel_remain_on_channel)
9390                 return -EOPNOTSUPP;
9391
9392         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9393
9394         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
9395 }
9396
9397 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
9398                                        struct genl_info *info)
9399 {
9400         struct cfg80211_bitrate_mask mask;
9401         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9402         struct net_device *dev = info->user_ptr[1];
9403         int err;
9404
9405         if (!rdev->ops->set_bitrate_mask)
9406                 return -EOPNOTSUPP;
9407
9408         err = nl80211_parse_tx_bitrate_mask(info, &mask);
9409         if (err)
9410                 return err;
9411
9412         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
9413 }
9414
9415 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
9416 {
9417         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9418         struct wireless_dev *wdev = info->user_ptr[1];
9419         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
9420
9421         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
9422                 return -EINVAL;
9423
9424         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
9425                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
9426
9427         switch (wdev->iftype) {
9428         case NL80211_IFTYPE_STATION:
9429         case NL80211_IFTYPE_ADHOC:
9430         case NL80211_IFTYPE_P2P_CLIENT:
9431         case NL80211_IFTYPE_AP:
9432         case NL80211_IFTYPE_AP_VLAN:
9433         case NL80211_IFTYPE_MESH_POINT:
9434         case NL80211_IFTYPE_P2P_GO:
9435         case NL80211_IFTYPE_P2P_DEVICE:
9436                 break;
9437         case NL80211_IFTYPE_NAN:
9438         default:
9439                 return -EOPNOTSUPP;
9440         }
9441
9442         /* not much point in registering if we can't reply */
9443         if (!rdev->ops->mgmt_tx)
9444                 return -EOPNOTSUPP;
9445
9446         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
9447                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
9448                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
9449 }
9450
9451 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
9452 {
9453         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9454         struct wireless_dev *wdev = info->user_ptr[1];
9455         struct cfg80211_chan_def chandef;
9456         int err;
9457         void *hdr = NULL;
9458         u64 cookie;
9459         struct sk_buff *msg = NULL;
9460         struct cfg80211_mgmt_tx_params params = {
9461                 .dont_wait_for_ack =
9462                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
9463         };
9464
9465         if (!info->attrs[NL80211_ATTR_FRAME])
9466                 return -EINVAL;
9467
9468         if (!rdev->ops->mgmt_tx)
9469                 return -EOPNOTSUPP;
9470
9471         switch (wdev->iftype) {
9472         case NL80211_IFTYPE_P2P_DEVICE:
9473                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
9474                         return -EINVAL;
9475         case NL80211_IFTYPE_STATION:
9476         case NL80211_IFTYPE_ADHOC:
9477         case NL80211_IFTYPE_P2P_CLIENT:
9478         case NL80211_IFTYPE_AP:
9479         case NL80211_IFTYPE_AP_VLAN:
9480         case NL80211_IFTYPE_MESH_POINT:
9481         case NL80211_IFTYPE_P2P_GO:
9482                 break;
9483         case NL80211_IFTYPE_NAN:
9484         default:
9485                 return -EOPNOTSUPP;
9486         }
9487
9488         if (info->attrs[NL80211_ATTR_DURATION]) {
9489                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9490                         return -EINVAL;
9491                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9492
9493                 /*
9494                  * We should wait on the channel for at least a minimum amount
9495                  * of time (10ms) but no longer than the driver supports.
9496                  */
9497                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9498                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
9499                         return -EINVAL;
9500         }
9501
9502         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
9503
9504         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9505                 return -EINVAL;
9506
9507         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
9508
9509         /* get the channel if any has been specified, otherwise pass NULL to
9510          * the driver. The latter will use the current one
9511          */
9512         chandef.chan = NULL;
9513         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9514                 err = nl80211_parse_chandef(rdev, info, &chandef);
9515                 if (err)
9516                         return err;
9517         }
9518
9519         if (!chandef.chan && params.offchan)
9520                 return -EINVAL;
9521
9522         wdev_lock(wdev);
9523         if (params.offchan && !cfg80211_off_channel_oper_allowed(wdev)) {
9524                 wdev_unlock(wdev);
9525                 return -EBUSY;
9526         }
9527         wdev_unlock(wdev);
9528
9529         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
9530         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
9531
9532         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
9533                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9534                 int i;
9535
9536                 if (len % sizeof(u16))
9537                         return -EINVAL;
9538
9539                 params.n_csa_offsets = len / sizeof(u16);
9540                 params.csa_offsets =
9541                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9542
9543                 /* check that all the offsets fit the frame */
9544                 for (i = 0; i < params.n_csa_offsets; i++) {
9545                         if (params.csa_offsets[i] >= params.len)
9546                                 return -EINVAL;
9547                 }
9548         }
9549
9550         if (!params.dont_wait_for_ack) {
9551                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9552                 if (!msg)
9553                         return -ENOMEM;
9554
9555                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9556                                      NL80211_CMD_FRAME);
9557                 if (!hdr) {
9558                         err = -ENOBUFS;
9559                         goto free_msg;
9560                 }
9561         }
9562
9563         params.chan = chandef.chan;
9564         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
9565         if (err)
9566                 goto free_msg;
9567
9568         if (msg) {
9569                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9570                                       NL80211_ATTR_PAD))
9571                         goto nla_put_failure;
9572
9573                 genlmsg_end(msg, hdr);
9574                 return genlmsg_reply(msg, info);
9575         }
9576
9577         return 0;
9578
9579  nla_put_failure:
9580         err = -ENOBUFS;
9581  free_msg:
9582         nlmsg_free(msg);
9583         return err;
9584 }
9585
9586 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9587 {
9588         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9589         struct wireless_dev *wdev = info->user_ptr[1];
9590         u64 cookie;
9591
9592         if (!info->attrs[NL80211_ATTR_COOKIE])
9593                 return -EINVAL;
9594
9595         if (!rdev->ops->mgmt_tx_cancel_wait)
9596                 return -EOPNOTSUPP;
9597
9598         switch (wdev->iftype) {
9599         case NL80211_IFTYPE_STATION:
9600         case NL80211_IFTYPE_ADHOC:
9601         case NL80211_IFTYPE_P2P_CLIENT:
9602         case NL80211_IFTYPE_AP:
9603         case NL80211_IFTYPE_AP_VLAN:
9604         case NL80211_IFTYPE_P2P_GO:
9605         case NL80211_IFTYPE_P2P_DEVICE:
9606                 break;
9607         case NL80211_IFTYPE_NAN:
9608         default:
9609                 return -EOPNOTSUPP;
9610         }
9611
9612         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9613
9614         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9615 }
9616
9617 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9618 {
9619         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9620         struct wireless_dev *wdev;
9621         struct net_device *dev = info->user_ptr[1];
9622         u8 ps_state;
9623         bool state;
9624         int err;
9625
9626         if (!info->attrs[NL80211_ATTR_PS_STATE])
9627                 return -EINVAL;
9628
9629         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9630
9631         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9632                 return -EINVAL;
9633
9634         wdev = dev->ieee80211_ptr;
9635
9636         if (!rdev->ops->set_power_mgmt)
9637                 return -EOPNOTSUPP;
9638
9639         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9640
9641         if (state == wdev->ps)
9642                 return 0;
9643
9644         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9645         if (!err)
9646                 wdev->ps = state;
9647         return err;
9648 }
9649
9650 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9651 {
9652         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9653         enum nl80211_ps_state ps_state;
9654         struct wireless_dev *wdev;
9655         struct net_device *dev = info->user_ptr[1];
9656         struct sk_buff *msg;
9657         void *hdr;
9658         int err;
9659
9660         wdev = dev->ieee80211_ptr;
9661
9662         if (!rdev->ops->set_power_mgmt)
9663                 return -EOPNOTSUPP;
9664
9665         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9666         if (!msg)
9667                 return -ENOMEM;
9668
9669         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9670                              NL80211_CMD_GET_POWER_SAVE);
9671         if (!hdr) {
9672                 err = -ENOBUFS;
9673                 goto free_msg;
9674         }
9675
9676         if (wdev->ps)
9677                 ps_state = NL80211_PS_ENABLED;
9678         else
9679                 ps_state = NL80211_PS_DISABLED;
9680
9681         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9682                 goto nla_put_failure;
9683
9684         genlmsg_end(msg, hdr);
9685         return genlmsg_reply(msg, info);
9686
9687  nla_put_failure:
9688         err = -ENOBUFS;
9689  free_msg:
9690         nlmsg_free(msg);
9691         return err;
9692 }
9693
9694 static const struct nla_policy
9695 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9696         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_BINARY },
9697         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9698         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9699         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9700         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9701         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9702         [NL80211_ATTR_CQM_RSSI_LEVEL] = { .type = NLA_S32 },
9703 };
9704
9705 static int nl80211_set_cqm_txe(struct genl_info *info,
9706                                u32 rate, u32 pkts, u32 intvl)
9707 {
9708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9709         struct net_device *dev = info->user_ptr[1];
9710         struct wireless_dev *wdev = dev->ieee80211_ptr;
9711
9712         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9713                 return -EINVAL;
9714
9715         if (!rdev->ops->set_cqm_txe_config)
9716                 return -EOPNOTSUPP;
9717
9718         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9719             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9720                 return -EOPNOTSUPP;
9721
9722         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9723 }
9724
9725 static int cfg80211_cqm_rssi_update(struct cfg80211_registered_device *rdev,
9726                                     struct net_device *dev)
9727 {
9728         struct wireless_dev *wdev = dev->ieee80211_ptr;
9729         s32 last, low, high;
9730         u32 hyst;
9731         int i, n;
9732         int err;
9733
9734         /* RSSI reporting disabled? */
9735         if (!wdev->cqm_config)
9736                 return rdev_set_cqm_rssi_range_config(rdev, dev, 0, 0);
9737
9738         /*
9739          * Obtain current RSSI value if possible, if not and no RSSI threshold
9740          * event has been received yet, we should receive an event after a
9741          * connection is established and enough beacons received to calculate
9742          * the average.
9743          */
9744         if (!wdev->cqm_config->last_rssi_event_value && wdev->current_bss &&
9745             rdev->ops->get_station) {
9746                 struct station_info sinfo;
9747                 u8 *mac_addr;
9748
9749                 mac_addr = wdev->current_bss->pub.bssid;
9750
9751                 err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
9752                 if (err)
9753                         return err;
9754
9755                 if (sinfo.filled & BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG))
9756                         wdev->cqm_config->last_rssi_event_value =
9757                                 (s8) sinfo.rx_beacon_signal_avg;
9758         }
9759
9760         last = wdev->cqm_config->last_rssi_event_value;
9761         hyst = wdev->cqm_config->rssi_hyst;
9762         n = wdev->cqm_config->n_rssi_thresholds;
9763
9764         for (i = 0; i < n; i++)
9765                 if (last < wdev->cqm_config->rssi_thresholds[i])
9766                         break;
9767
9768         low = i > 0 ?
9769                 (wdev->cqm_config->rssi_thresholds[i - 1] - hyst) : S32_MIN;
9770         high = i < n ?
9771                 (wdev->cqm_config->rssi_thresholds[i] + hyst - 1) : S32_MAX;
9772
9773         return rdev_set_cqm_rssi_range_config(rdev, dev, low, high);
9774 }
9775
9776 static int nl80211_set_cqm_rssi(struct genl_info *info,
9777                                 const s32 *thresholds, int n_thresholds,
9778                                 u32 hysteresis)
9779 {
9780         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9781         struct net_device *dev = info->user_ptr[1];
9782         struct wireless_dev *wdev = dev->ieee80211_ptr;
9783         int i, err;
9784         s32 prev = S32_MIN;
9785
9786         /* Check all values negative and sorted */
9787         for (i = 0; i < n_thresholds; i++) {
9788                 if (thresholds[i] > 0 || thresholds[i] <= prev)
9789                         return -EINVAL;
9790
9791                 prev = thresholds[i];
9792         }
9793
9794         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9795             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9796                 return -EOPNOTSUPP;
9797
9798         wdev_lock(wdev);
9799         cfg80211_cqm_config_free(wdev);
9800         wdev_unlock(wdev);
9801
9802         if (n_thresholds <= 1 && rdev->ops->set_cqm_rssi_config) {
9803                 if (n_thresholds == 0 || thresholds[0] == 0) /* Disabling */
9804                         return rdev_set_cqm_rssi_config(rdev, dev, 0, 0);
9805
9806                 return rdev_set_cqm_rssi_config(rdev, dev,
9807                                                 thresholds[0], hysteresis);
9808         }
9809
9810         if (!wiphy_ext_feature_isset(&rdev->wiphy,
9811                                      NL80211_EXT_FEATURE_CQM_RSSI_LIST))
9812                 return -EOPNOTSUPP;
9813
9814         if (n_thresholds == 1 && thresholds[0] == 0) /* Disabling */
9815                 n_thresholds = 0;
9816
9817         wdev_lock(wdev);
9818         if (n_thresholds) {
9819                 struct cfg80211_cqm_config *cqm_config;
9820
9821                 cqm_config = kzalloc(sizeof(struct cfg80211_cqm_config) +
9822                                      n_thresholds * sizeof(s32), GFP_KERNEL);
9823                 if (!cqm_config) {
9824                         err = -ENOMEM;
9825                         goto unlock;
9826                 }
9827
9828                 cqm_config->rssi_hyst = hysteresis;
9829                 cqm_config->n_rssi_thresholds = n_thresholds;
9830                 memcpy(cqm_config->rssi_thresholds, thresholds,
9831                        n_thresholds * sizeof(s32));
9832
9833                 wdev->cqm_config = cqm_config;
9834         }
9835
9836         err = cfg80211_cqm_rssi_update(rdev, dev);
9837
9838 unlock:
9839         wdev_unlock(wdev);
9840
9841         return err;
9842 }
9843
9844 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9845 {
9846         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9847         struct nlattr *cqm;
9848         int err;
9849
9850         cqm = info->attrs[NL80211_ATTR_CQM];
9851         if (!cqm)
9852                 return -EINVAL;
9853
9854         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9855                                nl80211_attr_cqm_policy, info->extack);
9856         if (err)
9857                 return err;
9858
9859         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9860             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9861                 const s32 *thresholds =
9862                         nla_data(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9863                 int len = nla_len(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9864                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9865
9866                 if (len % 4)
9867                         return -EINVAL;
9868
9869                 return nl80211_set_cqm_rssi(info, thresholds, len / 4,
9870                                             hysteresis);
9871         }
9872
9873         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9874             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9875             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9876                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9877                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9878                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9879
9880                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9881         }
9882
9883         return -EINVAL;
9884 }
9885
9886 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9887 {
9888         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9889         struct net_device *dev = info->user_ptr[1];
9890         struct ocb_setup setup = {};
9891         int err;
9892
9893         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9894         if (err)
9895                 return err;
9896
9897         return cfg80211_join_ocb(rdev, dev, &setup);
9898 }
9899
9900 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9901 {
9902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9903         struct net_device *dev = info->user_ptr[1];
9904
9905         return cfg80211_leave_ocb(rdev, dev);
9906 }
9907
9908 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9909 {
9910         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9911         struct net_device *dev = info->user_ptr[1];
9912         struct mesh_config cfg;
9913         struct mesh_setup setup;
9914         int err;
9915
9916         /* start with default */
9917         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9918         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9919
9920         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9921                 /* and parse parameters if given */
9922                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9923                 if (err)
9924                         return err;
9925         }
9926
9927         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9928             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9929                 return -EINVAL;
9930
9931         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9932         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9933
9934         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9935             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9936                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9937                         return -EINVAL;
9938
9939         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9940                 setup.beacon_interval =
9941                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9942
9943                 err = cfg80211_validate_beacon_int(rdev,
9944                                                    NL80211_IFTYPE_MESH_POINT,
9945                                                    setup.beacon_interval);
9946                 if (err)
9947                         return err;
9948         }
9949
9950         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9951                 setup.dtim_period =
9952                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9953                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9954                         return -EINVAL;
9955         }
9956
9957         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9958                 /* parse additional setup parameters if given */
9959                 err = nl80211_parse_mesh_setup(info, &setup);
9960                 if (err)
9961                         return err;
9962         }
9963
9964         if (setup.user_mpm)
9965                 cfg.auto_open_plinks = false;
9966
9967         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9968                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9969                 if (err)
9970                         return err;
9971         } else {
9972                 /* cfg80211_join_mesh() will sort it out */
9973                 setup.chandef.chan = NULL;
9974         }
9975
9976         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9977                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9978                 int n_rates =
9979                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9980                 struct ieee80211_supported_band *sband;
9981
9982                 if (!setup.chandef.chan)
9983                         return -EINVAL;
9984
9985                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9986
9987                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9988                                              &setup.basic_rates);
9989                 if (err)
9990                         return err;
9991         }
9992
9993         if (info->attrs[NL80211_ATTR_TX_RATES]) {
9994                 err = nl80211_parse_tx_bitrate_mask(info, &setup.beacon_rate);
9995                 if (err)
9996                         return err;
9997
9998                 if (!setup.chandef.chan)
9999                         return -EINVAL;
10000
10001                 err = validate_beacon_tx_rate(rdev, setup.chandef.chan->band,
10002                                               &setup.beacon_rate);
10003                 if (err)
10004                         return err;
10005         }
10006
10007         setup.userspace_handles_dfs =
10008                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
10009
10010         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
10011 }
10012
10013 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
10014 {
10015         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10016         struct net_device *dev = info->user_ptr[1];
10017
10018         return cfg80211_leave_mesh(rdev, dev);
10019 }
10020
10021 #ifdef CONFIG_PM
10022 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
10023                                         struct cfg80211_registered_device *rdev)
10024 {
10025         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
10026         struct nlattr *nl_pats, *nl_pat;
10027         int i, pat_len;
10028
10029         if (!wowlan->n_patterns)
10030                 return 0;
10031
10032         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
10033         if (!nl_pats)
10034                 return -ENOBUFS;
10035
10036         for (i = 0; i < wowlan->n_patterns; i++) {
10037                 nl_pat = nla_nest_start(msg, i + 1);
10038                 if (!nl_pat)
10039                         return -ENOBUFS;
10040                 pat_len = wowlan->patterns[i].pattern_len;
10041                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
10042                             wowlan->patterns[i].mask) ||
10043                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10044                             wowlan->patterns[i].pattern) ||
10045                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10046                                 wowlan->patterns[i].pkt_offset))
10047                         return -ENOBUFS;
10048                 nla_nest_end(msg, nl_pat);
10049         }
10050         nla_nest_end(msg, nl_pats);
10051
10052         return 0;
10053 }
10054
10055 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
10056                                    struct cfg80211_wowlan_tcp *tcp)
10057 {
10058         struct nlattr *nl_tcp;
10059
10060         if (!tcp)
10061                 return 0;
10062
10063         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
10064         if (!nl_tcp)
10065                 return -ENOBUFS;
10066
10067         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
10068             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
10069             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
10070             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
10071             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
10072             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
10073                     tcp->payload_len, tcp->payload) ||
10074             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
10075                         tcp->data_interval) ||
10076             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
10077                     tcp->wake_len, tcp->wake_data) ||
10078             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
10079                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
10080                 return -ENOBUFS;
10081
10082         if (tcp->payload_seq.len &&
10083             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
10084                     sizeof(tcp->payload_seq), &tcp->payload_seq))
10085                 return -ENOBUFS;
10086
10087         if (tcp->payload_tok.len &&
10088             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
10089                     sizeof(tcp->payload_tok) + tcp->tokens_size,
10090                     &tcp->payload_tok))
10091                 return -ENOBUFS;
10092
10093         nla_nest_end(msg, nl_tcp);
10094
10095         return 0;
10096 }
10097
10098 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
10099                                   struct cfg80211_sched_scan_request *req)
10100 {
10101         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
10102         int i;
10103
10104         if (!req)
10105                 return 0;
10106
10107         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
10108         if (!nd)
10109                 return -ENOBUFS;
10110
10111         if (req->n_scan_plans == 1 &&
10112             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
10113                         req->scan_plans[0].interval * 1000))
10114                 return -ENOBUFS;
10115
10116         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
10117                 return -ENOBUFS;
10118
10119         if (req->relative_rssi_set) {
10120                 struct nl80211_bss_select_rssi_adjust rssi_adjust;
10121
10122                 if (nla_put_s8(msg, NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI,
10123                                req->relative_rssi))
10124                         return -ENOBUFS;
10125
10126                 rssi_adjust.band = req->rssi_adjust.band;
10127                 rssi_adjust.delta = req->rssi_adjust.delta;
10128                 if (nla_put(msg, NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST,
10129                             sizeof(rssi_adjust), &rssi_adjust))
10130                         return -ENOBUFS;
10131         }
10132
10133         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10134         if (!freqs)
10135                 return -ENOBUFS;
10136
10137         for (i = 0; i < req->n_channels; i++) {
10138                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10139                         return -ENOBUFS;
10140         }
10141
10142         nla_nest_end(msg, freqs);
10143
10144         if (req->n_match_sets) {
10145                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
10146                 if (!matches)
10147                         return -ENOBUFS;
10148
10149                 for (i = 0; i < req->n_match_sets; i++) {
10150                         match = nla_nest_start(msg, i);
10151                         if (!match)
10152                                 return -ENOBUFS;
10153
10154                         if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
10155                                     req->match_sets[i].ssid.ssid_len,
10156                                     req->match_sets[i].ssid.ssid))
10157                                 return -ENOBUFS;
10158                         nla_nest_end(msg, match);
10159                 }
10160                 nla_nest_end(msg, matches);
10161         }
10162
10163         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
10164         if (!scan_plans)
10165                 return -ENOBUFS;
10166
10167         for (i = 0; i < req->n_scan_plans; i++) {
10168                 scan_plan = nla_nest_start(msg, i + 1);
10169                 if (!scan_plan)
10170                         return -ENOBUFS;
10171
10172                 if (!scan_plan ||
10173                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
10174                                 req->scan_plans[i].interval) ||
10175                     (req->scan_plans[i].iterations &&
10176                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
10177                                  req->scan_plans[i].iterations)))
10178                         return -ENOBUFS;
10179                 nla_nest_end(msg, scan_plan);
10180         }
10181         nla_nest_end(msg, scan_plans);
10182
10183         nla_nest_end(msg, nd);
10184
10185         return 0;
10186 }
10187
10188 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
10189 {
10190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10191         struct sk_buff *msg;
10192         void *hdr;
10193         u32 size = NLMSG_DEFAULT_SIZE;
10194
10195         if (!rdev->wiphy.wowlan)
10196                 return -EOPNOTSUPP;
10197
10198         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
10199                 /* adjust size to have room for all the data */
10200                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
10201                         rdev->wiphy.wowlan_config->tcp->payload_len +
10202                         rdev->wiphy.wowlan_config->tcp->wake_len +
10203                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
10204         }
10205
10206         msg = nlmsg_new(size, GFP_KERNEL);
10207         if (!msg)
10208                 return -ENOMEM;
10209
10210         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10211                              NL80211_CMD_GET_WOWLAN);
10212         if (!hdr)
10213                 goto nla_put_failure;
10214
10215         if (rdev->wiphy.wowlan_config) {
10216                 struct nlattr *nl_wowlan;
10217
10218                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10219                 if (!nl_wowlan)
10220                         goto nla_put_failure;
10221
10222                 if ((rdev->wiphy.wowlan_config->any &&
10223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
10224                     (rdev->wiphy.wowlan_config->disconnect &&
10225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
10226                     (rdev->wiphy.wowlan_config->magic_pkt &&
10227                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
10228                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
10229                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
10230                     (rdev->wiphy.wowlan_config->eap_identity_req &&
10231                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
10232                     (rdev->wiphy.wowlan_config->four_way_handshake &&
10233                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
10234                     (rdev->wiphy.wowlan_config->rfkill_release &&
10235                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
10236                         goto nla_put_failure;
10237
10238                 if (nl80211_send_wowlan_patterns(msg, rdev))
10239                         goto nla_put_failure;
10240
10241                 if (nl80211_send_wowlan_tcp(msg,
10242                                             rdev->wiphy.wowlan_config->tcp))
10243                         goto nla_put_failure;
10244
10245                 if (nl80211_send_wowlan_nd(
10246                             msg,
10247                             rdev->wiphy.wowlan_config->nd_config))
10248                         goto nla_put_failure;
10249
10250                 nla_nest_end(msg, nl_wowlan);
10251         }
10252
10253         genlmsg_end(msg, hdr);
10254         return genlmsg_reply(msg, info);
10255
10256 nla_put_failure:
10257         nlmsg_free(msg);
10258         return -ENOBUFS;
10259 }
10260
10261 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
10262                                     struct nlattr *attr,
10263                                     struct cfg80211_wowlan *trig)
10264 {
10265         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
10266         struct cfg80211_wowlan_tcp *cfg;
10267         struct nl80211_wowlan_tcp_data_token *tok = NULL;
10268         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
10269         u32 size;
10270         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
10271         int err, port;
10272
10273         if (!rdev->wiphy.wowlan->tcp)
10274                 return -EINVAL;
10275
10276         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TCP, attr,
10277                                nl80211_wowlan_tcp_policy, NULL);
10278         if (err)
10279                 return err;
10280
10281         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
10282             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
10283             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
10284             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
10285             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
10286             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
10287             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
10288             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
10289                 return -EINVAL;
10290
10291         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
10292         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
10293                 return -EINVAL;
10294
10295         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
10296                         rdev->wiphy.wowlan->tcp->data_interval_max ||
10297             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
10298                 return -EINVAL;
10299
10300         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
10301         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
10302                 return -EINVAL;
10303
10304         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
10305         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
10306                 return -EINVAL;
10307
10308         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
10309                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
10310
10311                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
10312                 tokens_size = tokln - sizeof(*tok);
10313
10314                 if (!tok->len || tokens_size % tok->len)
10315                         return -EINVAL;
10316                 if (!rdev->wiphy.wowlan->tcp->tok)
10317                         return -EINVAL;
10318                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
10319                         return -EINVAL;
10320                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
10321                         return -EINVAL;
10322                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
10323                         return -EINVAL;
10324                 if (tok->offset + tok->len > data_size)
10325                         return -EINVAL;
10326         }
10327
10328         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
10329                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
10330                 if (!rdev->wiphy.wowlan->tcp->seq)
10331                         return -EINVAL;
10332                 if (seq->len == 0 || seq->len > 4)
10333                         return -EINVAL;
10334                 if (seq->len + seq->offset > data_size)
10335                         return -EINVAL;
10336         }
10337
10338         size = sizeof(*cfg);
10339         size += data_size;
10340         size += wake_size + wake_mask_size;
10341         size += tokens_size;
10342
10343         cfg = kzalloc(size, GFP_KERNEL);
10344         if (!cfg)
10345                 return -ENOMEM;
10346         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
10347         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
10348         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
10349                ETH_ALEN);
10350         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
10351                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
10352         else
10353                 port = 0;
10354 #ifdef CONFIG_INET
10355         /* allocate a socket and port for it and use it */
10356         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
10357                             IPPROTO_TCP, &cfg->sock, 1);
10358         if (err) {
10359                 kfree(cfg);
10360                 return err;
10361         }
10362         if (inet_csk_get_port(cfg->sock->sk, port)) {
10363                 sock_release(cfg->sock);
10364                 kfree(cfg);
10365                 return -EADDRINUSE;
10366         }
10367         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
10368 #else
10369         if (!port) {
10370                 kfree(cfg);
10371                 return -EINVAL;
10372         }
10373         cfg->src_port = port;
10374 #endif
10375
10376         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
10377         cfg->payload_len = data_size;
10378         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
10379         memcpy((void *)cfg->payload,
10380                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
10381                data_size);
10382         if (seq)
10383                 cfg->payload_seq = *seq;
10384         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
10385         cfg->wake_len = wake_size;
10386         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
10387         memcpy((void *)cfg->wake_data,
10388                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
10389                wake_size);
10390         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
10391                          data_size + wake_size;
10392         memcpy((void *)cfg->wake_mask,
10393                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
10394                wake_mask_size);
10395         if (tok) {
10396                 cfg->tokens_size = tokens_size;
10397                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
10398         }
10399
10400         trig->tcp = cfg;
10401
10402         return 0;
10403 }
10404
10405 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
10406                                    const struct wiphy_wowlan_support *wowlan,
10407                                    struct nlattr *attr,
10408                                    struct cfg80211_wowlan *trig)
10409 {
10410         struct nlattr **tb;
10411         int err;
10412
10413         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
10414         if (!tb)
10415                 return -ENOMEM;
10416
10417         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
10418                 err = -EOPNOTSUPP;
10419                 goto out;
10420         }
10421
10422         err = nla_parse_nested(tb, NL80211_ATTR_MAX, attr, nl80211_policy,
10423                                NULL);
10424         if (err)
10425                 goto out;
10426
10427         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb,
10428                                                    wowlan->max_nd_match_sets);
10429         err = PTR_ERR_OR_ZERO(trig->nd_config);
10430         if (err)
10431                 trig->nd_config = NULL;
10432
10433 out:
10434         kfree(tb);
10435         return err;
10436 }
10437
10438 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
10439 {
10440         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10441         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
10442         struct cfg80211_wowlan new_triggers = {};
10443         struct cfg80211_wowlan *ntrig;
10444         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
10445         int err, i;
10446         bool prev_enabled = rdev->wiphy.wowlan_config;
10447         bool regular = false;
10448
10449         if (!wowlan)
10450                 return -EOPNOTSUPP;
10451
10452         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
10453                 cfg80211_rdev_free_wowlan(rdev);
10454                 rdev->wiphy.wowlan_config = NULL;
10455                 goto set_wakeup;
10456         }
10457
10458         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TRIG,
10459                                info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS],
10460                                nl80211_wowlan_policy, info->extack);
10461         if (err)
10462                 return err;
10463
10464         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
10465                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
10466                         return -EINVAL;
10467                 new_triggers.any = true;
10468         }
10469
10470         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
10471                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
10472                         return -EINVAL;
10473                 new_triggers.disconnect = true;
10474                 regular = true;
10475         }
10476
10477         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
10478                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
10479                         return -EINVAL;
10480                 new_triggers.magic_pkt = true;
10481                 regular = true;
10482         }
10483
10484         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
10485                 return -EINVAL;
10486
10487         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
10488                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
10489                         return -EINVAL;
10490                 new_triggers.gtk_rekey_failure = true;
10491                 regular = true;
10492         }
10493
10494         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
10495                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
10496                         return -EINVAL;
10497                 new_triggers.eap_identity_req = true;
10498                 regular = true;
10499         }
10500
10501         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
10502                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
10503                         return -EINVAL;
10504                 new_triggers.four_way_handshake = true;
10505                 regular = true;
10506         }
10507
10508         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
10509                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
10510                         return -EINVAL;
10511                 new_triggers.rfkill_release = true;
10512                 regular = true;
10513         }
10514
10515         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
10516                 struct nlattr *pat;
10517                 int n_patterns = 0;
10518                 int rem, pat_len, mask_len, pkt_offset;
10519                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10520
10521                 regular = true;
10522
10523                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10524                                     rem)
10525                         n_patterns++;
10526                 if (n_patterns > wowlan->n_patterns)
10527                         return -EINVAL;
10528
10529                 new_triggers.patterns = kcalloc(n_patterns,
10530                                                 sizeof(new_triggers.patterns[0]),
10531                                                 GFP_KERNEL);
10532                 if (!new_triggers.patterns)
10533                         return -ENOMEM;
10534
10535                 new_triggers.n_patterns = n_patterns;
10536                 i = 0;
10537
10538                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10539                                     rem) {
10540                         u8 *mask_pat;
10541
10542                         nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
10543                                          nl80211_packet_pattern_policy,
10544                                          info->extack);
10545                         err = -EINVAL;
10546                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
10547                             !pat_tb[NL80211_PKTPAT_PATTERN])
10548                                 goto error;
10549                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10550                         mask_len = DIV_ROUND_UP(pat_len, 8);
10551                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10552                                 goto error;
10553                         if (pat_len > wowlan->pattern_max_len ||
10554                             pat_len < wowlan->pattern_min_len)
10555                                 goto error;
10556
10557                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
10558                                 pkt_offset = 0;
10559                         else
10560                                 pkt_offset = nla_get_u32(
10561                                         pat_tb[NL80211_PKTPAT_OFFSET]);
10562                         if (pkt_offset > wowlan->max_pkt_offset)
10563                                 goto error;
10564                         new_triggers.patterns[i].pkt_offset = pkt_offset;
10565
10566                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10567                         if (!mask_pat) {
10568                                 err = -ENOMEM;
10569                                 goto error;
10570                         }
10571                         new_triggers.patterns[i].mask = mask_pat;
10572                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10573                                mask_len);
10574                         mask_pat += mask_len;
10575                         new_triggers.patterns[i].pattern = mask_pat;
10576                         new_triggers.patterns[i].pattern_len = pat_len;
10577                         memcpy(mask_pat,
10578                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10579                                pat_len);
10580                         i++;
10581                 }
10582         }
10583
10584         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
10585                 regular = true;
10586                 err = nl80211_parse_wowlan_tcp(
10587                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
10588                         &new_triggers);
10589                 if (err)
10590                         goto error;
10591         }
10592
10593         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
10594                 regular = true;
10595                 err = nl80211_parse_wowlan_nd(
10596                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
10597                         &new_triggers);
10598                 if (err)
10599                         goto error;
10600         }
10601
10602         /* The 'any' trigger means the device continues operating more or less
10603          * as in its normal operation mode and wakes up the host on most of the
10604          * normal interrupts (like packet RX, ...)
10605          * It therefore makes little sense to combine with the more constrained
10606          * wakeup trigger modes.
10607          */
10608         if (new_triggers.any && regular) {
10609                 err = -EINVAL;
10610                 goto error;
10611         }
10612
10613         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
10614         if (!ntrig) {
10615                 err = -ENOMEM;
10616                 goto error;
10617         }
10618         cfg80211_rdev_free_wowlan(rdev);
10619         rdev->wiphy.wowlan_config = ntrig;
10620
10621  set_wakeup:
10622         if (rdev->ops->set_wakeup &&
10623             prev_enabled != !!rdev->wiphy.wowlan_config)
10624                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
10625
10626         return 0;
10627  error:
10628         for (i = 0; i < new_triggers.n_patterns; i++)
10629                 kfree(new_triggers.patterns[i].mask);
10630         kfree(new_triggers.patterns);
10631         if (new_triggers.tcp && new_triggers.tcp->sock)
10632                 sock_release(new_triggers.tcp->sock);
10633         kfree(new_triggers.tcp);
10634         kfree(new_triggers.nd_config);
10635         return err;
10636 }
10637 #endif
10638
10639 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
10640                                        struct cfg80211_registered_device *rdev)
10641 {
10642         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
10643         int i, j, pat_len;
10644         struct cfg80211_coalesce_rules *rule;
10645
10646         if (!rdev->coalesce->n_rules)
10647                 return 0;
10648
10649         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
10650         if (!nl_rules)
10651                 return -ENOBUFS;
10652
10653         for (i = 0; i < rdev->coalesce->n_rules; i++) {
10654                 nl_rule = nla_nest_start(msg, i + 1);
10655                 if (!nl_rule)
10656                         return -ENOBUFS;
10657
10658                 rule = &rdev->coalesce->rules[i];
10659                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
10660                                 rule->delay))
10661                         return -ENOBUFS;
10662
10663                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
10664                                 rule->condition))
10665                         return -ENOBUFS;
10666
10667                 nl_pats = nla_nest_start(msg,
10668                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
10669                 if (!nl_pats)
10670                         return -ENOBUFS;
10671
10672                 for (j = 0; j < rule->n_patterns; j++) {
10673                         nl_pat = nla_nest_start(msg, j + 1);
10674                         if (!nl_pat)
10675                                 return -ENOBUFS;
10676                         pat_len = rule->patterns[j].pattern_len;
10677                         if (nla_put(msg, NL80211_PKTPAT_MASK,
10678                                     DIV_ROUND_UP(pat_len, 8),
10679                                     rule->patterns[j].mask) ||
10680                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10681                                     rule->patterns[j].pattern) ||
10682                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10683                                         rule->patterns[j].pkt_offset))
10684                                 return -ENOBUFS;
10685                         nla_nest_end(msg, nl_pat);
10686                 }
10687                 nla_nest_end(msg, nl_pats);
10688                 nla_nest_end(msg, nl_rule);
10689         }
10690         nla_nest_end(msg, nl_rules);
10691
10692         return 0;
10693 }
10694
10695 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
10696 {
10697         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10698         struct sk_buff *msg;
10699         void *hdr;
10700
10701         if (!rdev->wiphy.coalesce)
10702                 return -EOPNOTSUPP;
10703
10704         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10705         if (!msg)
10706                 return -ENOMEM;
10707
10708         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10709                              NL80211_CMD_GET_COALESCE);
10710         if (!hdr)
10711                 goto nla_put_failure;
10712
10713         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
10714                 goto nla_put_failure;
10715
10716         genlmsg_end(msg, hdr);
10717         return genlmsg_reply(msg, info);
10718
10719 nla_put_failure:
10720         nlmsg_free(msg);
10721         return -ENOBUFS;
10722 }
10723
10724 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
10725 {
10726         struct cfg80211_coalesce *coalesce = rdev->coalesce;
10727         int i, j;
10728         struct cfg80211_coalesce_rules *rule;
10729
10730         if (!coalesce)
10731                 return;
10732
10733         for (i = 0; i < coalesce->n_rules; i++) {
10734                 rule = &coalesce->rules[i];
10735                 for (j = 0; j < rule->n_patterns; j++)
10736                         kfree(rule->patterns[j].mask);
10737                 kfree(rule->patterns);
10738         }
10739         kfree(coalesce->rules);
10740         kfree(coalesce);
10741         rdev->coalesce = NULL;
10742 }
10743
10744 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10745                                        struct nlattr *rule,
10746                                        struct cfg80211_coalesce_rules *new_rule)
10747 {
10748         int err, i;
10749         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10750         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10751         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10752         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10753
10754         err = nla_parse_nested(tb, NL80211_ATTR_COALESCE_RULE_MAX, rule,
10755                                nl80211_coalesce_policy, NULL);
10756         if (err)
10757                 return err;
10758
10759         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10760                 new_rule->delay =
10761                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10762         if (new_rule->delay > coalesce->max_delay)
10763                 return -EINVAL;
10764
10765         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10766                 new_rule->condition =
10767                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10768         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10769             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10770                 return -EINVAL;
10771
10772         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10773                 return -EINVAL;
10774
10775         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10776                             rem)
10777                 n_patterns++;
10778         if (n_patterns > coalesce->n_patterns)
10779                 return -EINVAL;
10780
10781         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10782                                      GFP_KERNEL);
10783         if (!new_rule->patterns)
10784                 return -ENOMEM;
10785
10786         new_rule->n_patterns = n_patterns;
10787         i = 0;
10788
10789         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10790                             rem) {
10791                 u8 *mask_pat;
10792
10793                 nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
10794                                  nl80211_packet_pattern_policy, NULL);
10795                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10796                     !pat_tb[NL80211_PKTPAT_PATTERN])
10797                         return -EINVAL;
10798                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10799                 mask_len = DIV_ROUND_UP(pat_len, 8);
10800                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10801                         return -EINVAL;
10802                 if (pat_len > coalesce->pattern_max_len ||
10803                     pat_len < coalesce->pattern_min_len)
10804                         return -EINVAL;
10805
10806                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10807                         pkt_offset = 0;
10808                 else
10809                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10810                 if (pkt_offset > coalesce->max_pkt_offset)
10811                         return -EINVAL;
10812                 new_rule->patterns[i].pkt_offset = pkt_offset;
10813
10814                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10815                 if (!mask_pat)
10816                         return -ENOMEM;
10817
10818                 new_rule->patterns[i].mask = mask_pat;
10819                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10820                        mask_len);
10821
10822                 mask_pat += mask_len;
10823                 new_rule->patterns[i].pattern = mask_pat;
10824                 new_rule->patterns[i].pattern_len = pat_len;
10825                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10826                        pat_len);
10827                 i++;
10828         }
10829
10830         return 0;
10831 }
10832
10833 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10834 {
10835         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10836         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10837         struct cfg80211_coalesce new_coalesce = {};
10838         struct cfg80211_coalesce *n_coalesce;
10839         int err, rem_rule, n_rules = 0, i, j;
10840         struct nlattr *rule;
10841         struct cfg80211_coalesce_rules *tmp_rule;
10842
10843         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10844                 return -EOPNOTSUPP;
10845
10846         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10847                 cfg80211_rdev_free_coalesce(rdev);
10848                 rdev_set_coalesce(rdev, NULL);
10849                 return 0;
10850         }
10851
10852         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10853                             rem_rule)
10854                 n_rules++;
10855         if (n_rules > coalesce->n_rules)
10856                 return -EINVAL;
10857
10858         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10859                                      GFP_KERNEL);
10860         if (!new_coalesce.rules)
10861                 return -ENOMEM;
10862
10863         new_coalesce.n_rules = n_rules;
10864         i = 0;
10865
10866         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10867                             rem_rule) {
10868                 err = nl80211_parse_coalesce_rule(rdev, rule,
10869                                                   &new_coalesce.rules[i]);
10870                 if (err)
10871                         goto error;
10872
10873                 i++;
10874         }
10875
10876         err = rdev_set_coalesce(rdev, &new_coalesce);
10877         if (err)
10878                 goto error;
10879
10880         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10881         if (!n_coalesce) {
10882                 err = -ENOMEM;
10883                 goto error;
10884         }
10885         cfg80211_rdev_free_coalesce(rdev);
10886         rdev->coalesce = n_coalesce;
10887
10888         return 0;
10889 error:
10890         for (i = 0; i < new_coalesce.n_rules; i++) {
10891                 tmp_rule = &new_coalesce.rules[i];
10892                 for (j = 0; j < tmp_rule->n_patterns; j++)
10893                         kfree(tmp_rule->patterns[j].mask);
10894                 kfree(tmp_rule->patterns);
10895         }
10896         kfree(new_coalesce.rules);
10897
10898         return err;
10899 }
10900
10901 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10902 {
10903         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10904         struct net_device *dev = info->user_ptr[1];
10905         struct wireless_dev *wdev = dev->ieee80211_ptr;
10906         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10907         struct cfg80211_gtk_rekey_data rekey_data;
10908         int err;
10909
10910         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10911                 return -EINVAL;
10912
10913         err = nla_parse_nested(tb, MAX_NL80211_REKEY_DATA,
10914                                info->attrs[NL80211_ATTR_REKEY_DATA],
10915                                nl80211_rekey_policy, info->extack);
10916         if (err)
10917                 return err;
10918
10919         if (!tb[NL80211_REKEY_DATA_REPLAY_CTR] || !tb[NL80211_REKEY_DATA_KEK] ||
10920             !tb[NL80211_REKEY_DATA_KCK])
10921                 return -EINVAL;
10922         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10923                 return -ERANGE;
10924         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10925                 return -ERANGE;
10926         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10927                 return -ERANGE;
10928
10929         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10930         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10931         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10932
10933         wdev_lock(wdev);
10934         if (!wdev->current_bss) {
10935                 err = -ENOTCONN;
10936                 goto out;
10937         }
10938
10939         if (!rdev->ops->set_rekey_data) {
10940                 err = -EOPNOTSUPP;
10941                 goto out;
10942         }
10943
10944         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10945  out:
10946         wdev_unlock(wdev);
10947         return err;
10948 }
10949
10950 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10951                                              struct genl_info *info)
10952 {
10953         struct net_device *dev = info->user_ptr[1];
10954         struct wireless_dev *wdev = dev->ieee80211_ptr;
10955
10956         if (wdev->iftype != NL80211_IFTYPE_AP &&
10957             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10958                 return -EINVAL;
10959
10960         if (wdev->ap_unexpected_nlportid)
10961                 return -EBUSY;
10962
10963         wdev->ap_unexpected_nlportid = info->snd_portid;
10964         return 0;
10965 }
10966
10967 static int nl80211_probe_client(struct sk_buff *skb,
10968                                 struct genl_info *info)
10969 {
10970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10971         struct net_device *dev = info->user_ptr[1];
10972         struct wireless_dev *wdev = dev->ieee80211_ptr;
10973         struct sk_buff *msg;
10974         void *hdr;
10975         const u8 *addr;
10976         u64 cookie;
10977         int err;
10978
10979         if (wdev->iftype != NL80211_IFTYPE_AP &&
10980             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10981                 return -EOPNOTSUPP;
10982
10983         if (!info->attrs[NL80211_ATTR_MAC])
10984                 return -EINVAL;
10985
10986         if (!rdev->ops->probe_client)
10987                 return -EOPNOTSUPP;
10988
10989         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10990         if (!msg)
10991                 return -ENOMEM;
10992
10993         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10994                              NL80211_CMD_PROBE_CLIENT);
10995         if (!hdr) {
10996                 err = -ENOBUFS;
10997                 goto free_msg;
10998         }
10999
11000         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11001
11002         err = rdev_probe_client(rdev, dev, addr, &cookie);
11003         if (err)
11004                 goto free_msg;
11005
11006         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
11007                               NL80211_ATTR_PAD))
11008                 goto nla_put_failure;
11009
11010         genlmsg_end(msg, hdr);
11011
11012         return genlmsg_reply(msg, info);
11013
11014  nla_put_failure:
11015         err = -ENOBUFS;
11016  free_msg:
11017         nlmsg_free(msg);
11018         return err;
11019 }
11020
11021 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
11022 {
11023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11024         struct cfg80211_beacon_registration *reg, *nreg;
11025         int rv;
11026
11027         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
11028                 return -EOPNOTSUPP;
11029
11030         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
11031         if (!nreg)
11032                 return -ENOMEM;
11033
11034         /* First, check if already registered. */
11035         spin_lock_bh(&rdev->beacon_registrations_lock);
11036         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11037                 if (reg->nlportid == info->snd_portid) {
11038                         rv = -EALREADY;
11039                         goto out_err;
11040                 }
11041         }
11042         /* Add it to the list */
11043         nreg->nlportid = info->snd_portid;
11044         list_add(&nreg->list, &rdev->beacon_registrations);
11045
11046         spin_unlock_bh(&rdev->beacon_registrations_lock);
11047
11048         return 0;
11049 out_err:
11050         spin_unlock_bh(&rdev->beacon_registrations_lock);
11051         kfree(nreg);
11052         return rv;
11053 }
11054
11055 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
11056 {
11057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11058         struct wireless_dev *wdev = info->user_ptr[1];
11059         int err;
11060
11061         if (!rdev->ops->start_p2p_device)
11062                 return -EOPNOTSUPP;
11063
11064         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
11065                 return -EOPNOTSUPP;
11066
11067         if (wdev_running(wdev))
11068                 return 0;
11069
11070         if (rfkill_blocked(rdev->rfkill))
11071                 return -ERFKILL;
11072
11073         err = rdev_start_p2p_device(rdev, wdev);
11074         if (err)
11075                 return err;
11076
11077         wdev->is_running = true;
11078         rdev->opencount++;
11079
11080         return 0;
11081 }
11082
11083 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
11084 {
11085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11086         struct wireless_dev *wdev = info->user_ptr[1];
11087
11088         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
11089                 return -EOPNOTSUPP;
11090
11091         if (!rdev->ops->stop_p2p_device)
11092                 return -EOPNOTSUPP;
11093
11094         cfg80211_stop_p2p_device(rdev, wdev);
11095
11096         return 0;
11097 }
11098
11099 static int nl80211_start_nan(struct sk_buff *skb, struct genl_info *info)
11100 {
11101         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11102         struct wireless_dev *wdev = info->user_ptr[1];
11103         struct cfg80211_nan_conf conf = {};
11104         int err;
11105
11106         if (wdev->iftype != NL80211_IFTYPE_NAN)
11107                 return -EOPNOTSUPP;
11108
11109         if (wdev_running(wdev))
11110                 return -EEXIST;
11111
11112         if (rfkill_blocked(rdev->rfkill))
11113                 return -ERFKILL;
11114
11115         if (!info->attrs[NL80211_ATTR_NAN_MASTER_PREF])
11116                 return -EINVAL;
11117
11118         conf.master_pref =
11119                 nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
11120         if (!conf.master_pref)
11121                 return -EINVAL;
11122
11123         if (info->attrs[NL80211_ATTR_BANDS]) {
11124                 u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);
11125
11126                 if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
11127                         return -EOPNOTSUPP;
11128
11129                 if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
11130                         return -EINVAL;
11131
11132                 conf.bands = bands;
11133         }
11134
11135         err = rdev_start_nan(rdev, wdev, &conf);
11136         if (err)
11137                 return err;
11138
11139         wdev->is_running = true;
11140         rdev->opencount++;
11141
11142         return 0;
11143 }
11144
11145 static int nl80211_stop_nan(struct sk_buff *skb, struct genl_info *info)
11146 {
11147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11148         struct wireless_dev *wdev = info->user_ptr[1];
11149
11150         if (wdev->iftype != NL80211_IFTYPE_NAN)
11151                 return -EOPNOTSUPP;
11152
11153         cfg80211_stop_nan(rdev, wdev);
11154
11155         return 0;
11156 }
11157
11158 static int validate_nan_filter(struct nlattr *filter_attr)
11159 {
11160         struct nlattr *attr;
11161         int len = 0, n_entries = 0, rem;
11162
11163         nla_for_each_nested(attr, filter_attr, rem) {
11164                 len += nla_len(attr);
11165                 n_entries++;
11166         }
11167
11168         if (len >= U8_MAX)
11169                 return -EINVAL;
11170
11171         return n_entries;
11172 }
11173
11174 static int handle_nan_filter(struct nlattr *attr_filter,
11175                              struct cfg80211_nan_func *func,
11176                              bool tx)
11177 {
11178         struct nlattr *attr;
11179         int n_entries, rem, i;
11180         struct cfg80211_nan_func_filter *filter;
11181
11182         n_entries = validate_nan_filter(attr_filter);
11183         if (n_entries < 0)
11184                 return n_entries;
11185
11186         BUILD_BUG_ON(sizeof(*func->rx_filters) != sizeof(*func->tx_filters));
11187
11188         filter = kcalloc(n_entries, sizeof(*func->rx_filters), GFP_KERNEL);
11189         if (!filter)
11190                 return -ENOMEM;
11191
11192         i = 0;
11193         nla_for_each_nested(attr, attr_filter, rem) {
11194                 filter[i].filter = nla_memdup(attr, GFP_KERNEL);
11195                 filter[i].len = nla_len(attr);
11196                 i++;
11197         }
11198         if (tx) {
11199                 func->num_tx_filters = n_entries;
11200                 func->tx_filters = filter;
11201         } else {
11202                 func->num_rx_filters = n_entries;
11203                 func->rx_filters = filter;
11204         }
11205
11206         return 0;
11207 }
11208
11209 static int nl80211_nan_add_func(struct sk_buff *skb,
11210                                 struct genl_info *info)
11211 {
11212         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11213         struct wireless_dev *wdev = info->user_ptr[1];
11214         struct nlattr *tb[NUM_NL80211_NAN_FUNC_ATTR], *func_attr;
11215         struct cfg80211_nan_func *func;
11216         struct sk_buff *msg = NULL;
11217         void *hdr = NULL;
11218         int err = 0;
11219
11220         if (wdev->iftype != NL80211_IFTYPE_NAN)
11221                 return -EOPNOTSUPP;
11222
11223         if (!wdev_running(wdev))
11224                 return -ENOTCONN;
11225
11226         if (!info->attrs[NL80211_ATTR_NAN_FUNC])
11227                 return -EINVAL;
11228
11229         err = nla_parse_nested(tb, NL80211_NAN_FUNC_ATTR_MAX,
11230                                info->attrs[NL80211_ATTR_NAN_FUNC],
11231                                nl80211_nan_func_policy, info->extack);
11232         if (err)
11233                 return err;
11234
11235         func = kzalloc(sizeof(*func), GFP_KERNEL);
11236         if (!func)
11237                 return -ENOMEM;
11238
11239         func->cookie = wdev->wiphy->cookie_counter++;
11240
11241         if (!tb[NL80211_NAN_FUNC_TYPE] ||
11242             nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]) > NL80211_NAN_FUNC_MAX_TYPE) {
11243                 err = -EINVAL;
11244                 goto out;
11245         }
11246
11247
11248         func->type = nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]);
11249
11250         if (!tb[NL80211_NAN_FUNC_SERVICE_ID]) {
11251                 err = -EINVAL;
11252                 goto out;
11253         }
11254
11255         memcpy(func->service_id, nla_data(tb[NL80211_NAN_FUNC_SERVICE_ID]),
11256                sizeof(func->service_id));
11257
11258         func->close_range =
11259                 nla_get_flag(tb[NL80211_NAN_FUNC_CLOSE_RANGE]);
11260
11261         if (tb[NL80211_NAN_FUNC_SERVICE_INFO]) {
11262                 func->serv_spec_info_len =
11263                         nla_len(tb[NL80211_NAN_FUNC_SERVICE_INFO]);
11264                 func->serv_spec_info =
11265                         kmemdup(nla_data(tb[NL80211_NAN_FUNC_SERVICE_INFO]),
11266                                 func->serv_spec_info_len,
11267                                 GFP_KERNEL);
11268                 if (!func->serv_spec_info) {
11269                         err = -ENOMEM;
11270                         goto out;
11271                 }
11272         }
11273
11274         if (tb[NL80211_NAN_FUNC_TTL])
11275                 func->ttl = nla_get_u32(tb[NL80211_NAN_FUNC_TTL]);
11276
11277         switch (func->type) {
11278         case NL80211_NAN_FUNC_PUBLISH:
11279                 if (!tb[NL80211_NAN_FUNC_PUBLISH_TYPE]) {
11280                         err = -EINVAL;
11281                         goto out;
11282                 }
11283
11284                 func->publish_type =
11285                         nla_get_u8(tb[NL80211_NAN_FUNC_PUBLISH_TYPE]);
11286                 func->publish_bcast =
11287                         nla_get_flag(tb[NL80211_NAN_FUNC_PUBLISH_BCAST]);
11288
11289                 if ((!(func->publish_type & NL80211_NAN_SOLICITED_PUBLISH)) &&
11290                         func->publish_bcast) {
11291                         err = -EINVAL;
11292                         goto out;
11293                 }
11294                 break;
11295         case NL80211_NAN_FUNC_SUBSCRIBE:
11296                 func->subscribe_active =
11297                         nla_get_flag(tb[NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE]);
11298                 break;
11299         case NL80211_NAN_FUNC_FOLLOW_UP:
11300                 if (!tb[NL80211_NAN_FUNC_FOLLOW_UP_ID] ||
11301                     !tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]) {
11302                         err = -EINVAL;
11303                         goto out;
11304                 }
11305
11306                 func->followup_id =
11307                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_ID]);
11308                 func->followup_reqid =
11309                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]);
11310                 memcpy(func->followup_dest.addr,
11311                        nla_data(tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]),
11312                        sizeof(func->followup_dest.addr));
11313                 if (func->ttl) {
11314                         err = -EINVAL;
11315                         goto out;
11316                 }
11317                 break;
11318         default:
11319                 err = -EINVAL;
11320                 goto out;
11321         }
11322
11323         if (tb[NL80211_NAN_FUNC_SRF]) {
11324                 struct nlattr *srf_tb[NUM_NL80211_NAN_SRF_ATTR];
11325
11326                 err = nla_parse_nested(srf_tb, NL80211_NAN_SRF_ATTR_MAX,
11327                                        tb[NL80211_NAN_FUNC_SRF],
11328                                        nl80211_nan_srf_policy, info->extack);
11329                 if (err)
11330                         goto out;
11331
11332                 func->srf_include =
11333                         nla_get_flag(srf_tb[NL80211_NAN_SRF_INCLUDE]);
11334
11335                 if (srf_tb[NL80211_NAN_SRF_BF]) {
11336                         if (srf_tb[NL80211_NAN_SRF_MAC_ADDRS] ||
11337                             !srf_tb[NL80211_NAN_SRF_BF_IDX]) {
11338                                 err = -EINVAL;
11339                                 goto out;
11340                         }
11341
11342                         func->srf_bf_len =
11343                                 nla_len(srf_tb[NL80211_NAN_SRF_BF]);
11344                         func->srf_bf =
11345                                 kmemdup(nla_data(srf_tb[NL80211_NAN_SRF_BF]),
11346                                         func->srf_bf_len, GFP_KERNEL);
11347                         if (!func->srf_bf) {
11348                                 err = -ENOMEM;
11349                                 goto out;
11350                         }
11351
11352                         func->srf_bf_idx =
11353                                 nla_get_u8(srf_tb[NL80211_NAN_SRF_BF_IDX]);
11354                 } else {
11355                         struct nlattr *attr, *mac_attr =
11356                                 srf_tb[NL80211_NAN_SRF_MAC_ADDRS];
11357                         int n_entries, rem, i = 0;
11358
11359                         if (!mac_attr) {
11360                                 err = -EINVAL;
11361                                 goto out;
11362                         }
11363
11364                         n_entries = validate_acl_mac_addrs(mac_attr);
11365                         if (n_entries <= 0) {
11366                                 err = -EINVAL;
11367                                 goto out;
11368                         }
11369
11370                         func->srf_num_macs = n_entries;
11371                         func->srf_macs =
11372                                 kzalloc(sizeof(*func->srf_macs) * n_entries,
11373                                         GFP_KERNEL);
11374                         if (!func->srf_macs) {
11375                                 err = -ENOMEM;
11376                                 goto out;
11377                         }
11378
11379                         nla_for_each_nested(attr, mac_attr, rem)
11380                                 memcpy(func->srf_macs[i++].addr, nla_data(attr),
11381                                        sizeof(*func->srf_macs));
11382                 }
11383         }
11384
11385         if (tb[NL80211_NAN_FUNC_TX_MATCH_FILTER]) {
11386                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_TX_MATCH_FILTER],
11387                                         func, true);
11388                 if (err)
11389                         goto out;
11390         }
11391
11392         if (tb[NL80211_NAN_FUNC_RX_MATCH_FILTER]) {
11393                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_RX_MATCH_FILTER],
11394                                         func, false);
11395                 if (err)
11396                         goto out;
11397         }
11398
11399         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11400         if (!msg) {
11401                 err = -ENOMEM;
11402                 goto out;
11403         }
11404
11405         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11406                              NL80211_CMD_ADD_NAN_FUNCTION);
11407         /* This can't really happen - we just allocated 4KB */
11408         if (WARN_ON(!hdr)) {
11409                 err = -ENOMEM;
11410                 goto out;
11411         }
11412
11413         err = rdev_add_nan_func(rdev, wdev, func);
11414 out:
11415         if (err < 0) {
11416                 cfg80211_free_nan_func(func);
11417                 nlmsg_free(msg);
11418                 return err;
11419         }
11420
11421         /* propagate the instance id and cookie to userspace  */
11422         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, func->cookie,
11423                               NL80211_ATTR_PAD))
11424                 goto nla_put_failure;
11425
11426         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
11427         if (!func_attr)
11428                 goto nla_put_failure;
11429
11430         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID,
11431                        func->instance_id))
11432                 goto nla_put_failure;
11433
11434         nla_nest_end(msg, func_attr);
11435
11436         genlmsg_end(msg, hdr);
11437         return genlmsg_reply(msg, info);
11438
11439 nla_put_failure:
11440         nlmsg_free(msg);
11441         return -ENOBUFS;
11442 }
11443
11444 static int nl80211_nan_del_func(struct sk_buff *skb,
11445                                struct genl_info *info)
11446 {
11447         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11448         struct wireless_dev *wdev = info->user_ptr[1];
11449         u64 cookie;
11450
11451         if (wdev->iftype != NL80211_IFTYPE_NAN)
11452                 return -EOPNOTSUPP;
11453
11454         if (!wdev_running(wdev))
11455                 return -ENOTCONN;
11456
11457         if (!info->attrs[NL80211_ATTR_COOKIE])
11458                 return -EINVAL;
11459
11460         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
11461
11462         rdev_del_nan_func(rdev, wdev, cookie);
11463
11464         return 0;
11465 }
11466
11467 static int nl80211_nan_change_config(struct sk_buff *skb,
11468                                      struct genl_info *info)
11469 {
11470         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11471         struct wireless_dev *wdev = info->user_ptr[1];
11472         struct cfg80211_nan_conf conf = {};
11473         u32 changed = 0;
11474
11475         if (wdev->iftype != NL80211_IFTYPE_NAN)
11476                 return -EOPNOTSUPP;
11477
11478         if (!wdev_running(wdev))
11479                 return -ENOTCONN;
11480
11481         if (info->attrs[NL80211_ATTR_NAN_MASTER_PREF]) {
11482                 conf.master_pref =
11483                         nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
11484                 if (conf.master_pref <= 1 || conf.master_pref == 255)
11485                         return -EINVAL;
11486
11487                 changed |= CFG80211_NAN_CONF_CHANGED_PREF;
11488         }
11489
11490         if (info->attrs[NL80211_ATTR_BANDS]) {
11491                 u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);
11492
11493                 if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
11494                         return -EOPNOTSUPP;
11495
11496                 if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
11497                         return -EINVAL;
11498
11499                 conf.bands = bands;
11500                 changed |= CFG80211_NAN_CONF_CHANGED_BANDS;
11501         }
11502
11503         if (!changed)
11504                 return -EINVAL;
11505
11506         return rdev_nan_change_conf(rdev, wdev, &conf, changed);
11507 }
11508
11509 void cfg80211_nan_match(struct wireless_dev *wdev,
11510                         struct cfg80211_nan_match_params *match, gfp_t gfp)
11511 {
11512         struct wiphy *wiphy = wdev->wiphy;
11513         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11514         struct nlattr *match_attr, *local_func_attr, *peer_func_attr;
11515         struct sk_buff *msg;
11516         void *hdr;
11517
11518         if (WARN_ON(!match->inst_id || !match->peer_inst_id || !match->addr))
11519                 return;
11520
11521         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11522         if (!msg)
11523                 return;
11524
11525         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NAN_MATCH);
11526         if (!hdr) {
11527                 nlmsg_free(msg);
11528                 return;
11529         }
11530
11531         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11532             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11533                                          wdev->netdev->ifindex)) ||
11534             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11535                               NL80211_ATTR_PAD))
11536                 goto nla_put_failure;
11537
11538         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, match->cookie,
11539                               NL80211_ATTR_PAD) ||
11540             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, match->addr))
11541                 goto nla_put_failure;
11542
11543         match_attr = nla_nest_start(msg, NL80211_ATTR_NAN_MATCH);
11544         if (!match_attr)
11545                 goto nla_put_failure;
11546
11547         local_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_LOCAL);
11548         if (!local_func_attr)
11549                 goto nla_put_failure;
11550
11551         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->inst_id))
11552                 goto nla_put_failure;
11553
11554         nla_nest_end(msg, local_func_attr);
11555
11556         peer_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_PEER);
11557         if (!peer_func_attr)
11558                 goto nla_put_failure;
11559
11560         if (nla_put_u8(msg, NL80211_NAN_FUNC_TYPE, match->type) ||
11561             nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->peer_inst_id))
11562                 goto nla_put_failure;
11563
11564         if (match->info && match->info_len &&
11565             nla_put(msg, NL80211_NAN_FUNC_SERVICE_INFO, match->info_len,
11566                     match->info))
11567                 goto nla_put_failure;
11568
11569         nla_nest_end(msg, peer_func_attr);
11570         nla_nest_end(msg, match_attr);
11571         genlmsg_end(msg, hdr);
11572
11573         if (!wdev->owner_nlportid)
11574                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11575                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11576         else
11577                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11578                                 wdev->owner_nlportid);
11579
11580         return;
11581
11582 nla_put_failure:
11583         nlmsg_free(msg);
11584 }
11585 EXPORT_SYMBOL(cfg80211_nan_match);
11586
11587 void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
11588                                   u8 inst_id,
11589                                   enum nl80211_nan_func_term_reason reason,
11590                                   u64 cookie, gfp_t gfp)
11591 {
11592         struct wiphy *wiphy = wdev->wiphy;
11593         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11594         struct sk_buff *msg;
11595         struct nlattr *func_attr;
11596         void *hdr;
11597
11598         if (WARN_ON(!inst_id))
11599                 return;
11600
11601         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11602         if (!msg)
11603                 return;
11604
11605         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_NAN_FUNCTION);
11606         if (!hdr) {
11607                 nlmsg_free(msg);
11608                 return;
11609         }
11610
11611         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11612             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11613                                          wdev->netdev->ifindex)) ||
11614             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11615                               NL80211_ATTR_PAD))
11616                 goto nla_put_failure;
11617
11618         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
11619                               NL80211_ATTR_PAD))
11620                 goto nla_put_failure;
11621
11622         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
11623         if (!func_attr)
11624                 goto nla_put_failure;
11625
11626         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, inst_id) ||
11627             nla_put_u8(msg, NL80211_NAN_FUNC_TERM_REASON, reason))
11628                 goto nla_put_failure;
11629
11630         nla_nest_end(msg, func_attr);
11631         genlmsg_end(msg, hdr);
11632
11633         if (!wdev->owner_nlportid)
11634                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11635                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11636         else
11637                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11638                                 wdev->owner_nlportid);
11639
11640         return;
11641
11642 nla_put_failure:
11643         nlmsg_free(msg);
11644 }
11645 EXPORT_SYMBOL(cfg80211_nan_func_terminated);
11646
11647 static int nl80211_get_protocol_features(struct sk_buff *skb,
11648                                          struct genl_info *info)
11649 {
11650         void *hdr;
11651         struct sk_buff *msg;
11652
11653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11654         if (!msg)
11655                 return -ENOMEM;
11656
11657         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11658                              NL80211_CMD_GET_PROTOCOL_FEATURES);
11659         if (!hdr)
11660                 goto nla_put_failure;
11661
11662         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
11663                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
11664                 goto nla_put_failure;
11665
11666         genlmsg_end(msg, hdr);
11667         return genlmsg_reply(msg, info);
11668
11669  nla_put_failure:
11670         kfree_skb(msg);
11671         return -ENOBUFS;
11672 }
11673
11674 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
11675 {
11676         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11677         struct cfg80211_update_ft_ies_params ft_params;
11678         struct net_device *dev = info->user_ptr[1];
11679
11680         if (!rdev->ops->update_ft_ies)
11681                 return -EOPNOTSUPP;
11682
11683         if (!info->attrs[NL80211_ATTR_MDID] ||
11684             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
11685                 return -EINVAL;
11686
11687         memset(&ft_params, 0, sizeof(ft_params));
11688         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
11689         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
11690         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
11691
11692         return rdev_update_ft_ies(rdev, dev, &ft_params);
11693 }
11694
11695 static int nl80211_crit_protocol_start(struct sk_buff *skb,
11696                                        struct genl_info *info)
11697 {
11698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11699         struct wireless_dev *wdev = info->user_ptr[1];
11700         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
11701         u16 duration;
11702         int ret;
11703
11704         if (!rdev->ops->crit_proto_start)
11705                 return -EOPNOTSUPP;
11706
11707         if (WARN_ON(!rdev->ops->crit_proto_stop))
11708                 return -EINVAL;
11709
11710         if (rdev->crit_proto_nlportid)
11711                 return -EBUSY;
11712
11713         /* determine protocol if provided */
11714         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
11715                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
11716
11717         if (proto >= NUM_NL80211_CRIT_PROTO)
11718                 return -EINVAL;
11719
11720         /* timeout must be provided */
11721         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
11722                 return -EINVAL;
11723
11724         duration =
11725                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
11726
11727         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
11728                 return -ERANGE;
11729
11730         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
11731         if (!ret)
11732                 rdev->crit_proto_nlportid = info->snd_portid;
11733
11734         return ret;
11735 }
11736
11737 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
11738                                       struct genl_info *info)
11739 {
11740         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11741         struct wireless_dev *wdev = info->user_ptr[1];
11742
11743         if (!rdev->ops->crit_proto_stop)
11744                 return -EOPNOTSUPP;
11745
11746         if (rdev->crit_proto_nlportid) {
11747                 rdev->crit_proto_nlportid = 0;
11748                 rdev_crit_proto_stop(rdev, wdev);
11749         }
11750         return 0;
11751 }
11752
11753 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
11754 {
11755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11756         struct wireless_dev *wdev =
11757                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
11758         int i, err;
11759         u32 vid, subcmd;
11760
11761         if (!rdev->wiphy.vendor_commands)
11762                 return -EOPNOTSUPP;
11763
11764         if (IS_ERR(wdev)) {
11765                 err = PTR_ERR(wdev);
11766                 if (err != -EINVAL)
11767                         return err;
11768                 wdev = NULL;
11769         } else if (wdev->wiphy != &rdev->wiphy) {
11770                 return -EINVAL;
11771         }
11772
11773         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
11774             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
11775                 return -EINVAL;
11776
11777         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
11778         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
11779         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
11780                 const struct wiphy_vendor_command *vcmd;
11781                 void *data = NULL;
11782                 int len = 0;
11783
11784                 vcmd = &rdev->wiphy.vendor_commands[i];
11785
11786                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
11787                         continue;
11788
11789                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
11790                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
11791                         if (!wdev)
11792                                 return -EINVAL;
11793                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
11794                             !wdev->netdev)
11795                                 return -EINVAL;
11796
11797                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
11798                                 if (!wdev_running(wdev))
11799                                         return -ENETDOWN;
11800                         }
11801
11802                         if (!vcmd->doit)
11803                                 return -EOPNOTSUPP;
11804                 } else {
11805                         wdev = NULL;
11806                 }
11807
11808                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
11809                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11810                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11811                 }
11812
11813                 rdev->cur_cmd_info = info;
11814                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
11815                                                           data, len);
11816                 rdev->cur_cmd_info = NULL;
11817                 return err;
11818         }
11819
11820         return -EOPNOTSUPP;
11821 }
11822
11823 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
11824                                        struct netlink_callback *cb,
11825                                        struct cfg80211_registered_device **rdev,
11826                                        struct wireless_dev **wdev)
11827 {
11828         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
11829         u32 vid, subcmd;
11830         unsigned int i;
11831         int vcmd_idx = -1;
11832         int err;
11833         void *data = NULL;
11834         unsigned int data_len = 0;
11835
11836         if (cb->args[0]) {
11837                 /* subtract the 1 again here */
11838                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
11839                 struct wireless_dev *tmp;
11840
11841                 if (!wiphy)
11842                         return -ENODEV;
11843                 *rdev = wiphy_to_rdev(wiphy);
11844                 *wdev = NULL;
11845
11846                 if (cb->args[1]) {
11847                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
11848                                 if (tmp->identifier == cb->args[1] - 1) {
11849                                         *wdev = tmp;
11850                                         break;
11851                                 }
11852                         }
11853                 }
11854
11855                 /* keep rtnl locked in successful case */
11856                 return 0;
11857         }
11858
11859         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, attrbuf,
11860                           nl80211_fam.maxattr, nl80211_policy, NULL);
11861         if (err)
11862                 return err;
11863
11864         if (!attrbuf[NL80211_ATTR_VENDOR_ID] ||
11865             !attrbuf[NL80211_ATTR_VENDOR_SUBCMD])
11866                 return -EINVAL;
11867
11868         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk), attrbuf);
11869         if (IS_ERR(*wdev))
11870                 *wdev = NULL;
11871
11872         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
11873         if (IS_ERR(*rdev))
11874                 return PTR_ERR(*rdev);
11875
11876         vid = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_ID]);
11877         subcmd = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
11878
11879         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
11880                 const struct wiphy_vendor_command *vcmd;
11881
11882                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
11883
11884                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
11885                         continue;
11886
11887                 if (!vcmd->dumpit)
11888                         return -EOPNOTSUPP;
11889
11890                 vcmd_idx = i;
11891                 break;
11892         }
11893
11894         if (vcmd_idx < 0)
11895                 return -EOPNOTSUPP;
11896
11897         if (attrbuf[NL80211_ATTR_VENDOR_DATA]) {
11898                 data = nla_data(attrbuf[NL80211_ATTR_VENDOR_DATA]);
11899                 data_len = nla_len(attrbuf[NL80211_ATTR_VENDOR_DATA]);
11900         }
11901
11902         /* 0 is the first index - add 1 to parse only once */
11903         cb->args[0] = (*rdev)->wiphy_idx + 1;
11904         /* add 1 to know if it was NULL */
11905         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
11906         cb->args[2] = vcmd_idx;
11907         cb->args[3] = (unsigned long)data;
11908         cb->args[4] = data_len;
11909
11910         /* keep rtnl locked in successful case */
11911         return 0;
11912 }
11913
11914 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
11915                                    struct netlink_callback *cb)
11916 {
11917         struct cfg80211_registered_device *rdev;
11918         struct wireless_dev *wdev;
11919         unsigned int vcmd_idx;
11920         const struct wiphy_vendor_command *vcmd;
11921         void *data;
11922         int data_len;
11923         int err;
11924         struct nlattr *vendor_data;
11925
11926         rtnl_lock();
11927         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
11928         if (err)
11929                 goto out;
11930
11931         vcmd_idx = cb->args[2];
11932         data = (void *)cb->args[3];
11933         data_len = cb->args[4];
11934         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
11935
11936         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
11937                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
11938                 if (!wdev) {
11939                         err = -EINVAL;
11940                         goto out;
11941                 }
11942                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
11943                     !wdev->netdev) {
11944                         err = -EINVAL;
11945                         goto out;
11946                 }
11947
11948                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
11949                         if (!wdev_running(wdev)) {
11950                                 err = -ENETDOWN;
11951                                 goto out;
11952                         }
11953                 }
11954         }
11955
11956         while (1) {
11957                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
11958                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
11959                                            NL80211_CMD_VENDOR);
11960                 if (!hdr)
11961                         break;
11962
11963                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11964                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
11965                                                wdev_id(wdev),
11966                                                NL80211_ATTR_PAD))) {
11967                         genlmsg_cancel(skb, hdr);
11968                         break;
11969                 }
11970
11971                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
11972                 if (!vendor_data) {
11973                         genlmsg_cancel(skb, hdr);
11974                         break;
11975                 }
11976
11977                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
11978                                    (unsigned long *)&cb->args[5]);
11979                 nla_nest_end(skb, vendor_data);
11980
11981                 if (err == -ENOBUFS || err == -ENOENT) {
11982                         genlmsg_cancel(skb, hdr);
11983                         break;
11984                 } else if (err) {
11985                         genlmsg_cancel(skb, hdr);
11986                         goto out;
11987                 }
11988
11989                 genlmsg_end(skb, hdr);
11990         }
11991
11992         err = skb->len;
11993  out:
11994         rtnl_unlock();
11995         return err;
11996 }
11997
11998 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
11999                                            enum nl80211_commands cmd,
12000                                            enum nl80211_attrs attr,
12001                                            int approxlen)
12002 {
12003         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12004
12005         if (WARN_ON(!rdev->cur_cmd_info))
12006                 return NULL;
12007
12008         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
12009                                            rdev->cur_cmd_info->snd_portid,
12010                                            rdev->cur_cmd_info->snd_seq,
12011                                            cmd, attr, NULL, GFP_KERNEL);
12012 }
12013 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
12014
12015 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
12016 {
12017         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
12018         void *hdr = ((void **)skb->cb)[1];
12019         struct nlattr *data = ((void **)skb->cb)[2];
12020
12021         /* clear CB data for netlink core to own from now on */
12022         memset(skb->cb, 0, sizeof(skb->cb));
12023
12024         if (WARN_ON(!rdev->cur_cmd_info)) {
12025                 kfree_skb(skb);
12026                 return -EINVAL;
12027         }
12028
12029         nla_nest_end(skb, data);
12030         genlmsg_end(skb, hdr);
12031         return genlmsg_reply(skb, rdev->cur_cmd_info);
12032 }
12033 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
12034
12035 static int nl80211_set_qos_map(struct sk_buff *skb,
12036                                struct genl_info *info)
12037 {
12038         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12039         struct cfg80211_qos_map *qos_map = NULL;
12040         struct net_device *dev = info->user_ptr[1];
12041         u8 *pos, len, num_des, des_len, des;
12042         int ret;
12043
12044         if (!rdev->ops->set_qos_map)
12045                 return -EOPNOTSUPP;
12046
12047         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
12048                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
12049                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
12050
12051                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
12052                     len > IEEE80211_QOS_MAP_LEN_MAX)
12053                         return -EINVAL;
12054
12055                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
12056                 if (!qos_map)
12057                         return -ENOMEM;
12058
12059                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
12060                 if (num_des) {
12061                         des_len = num_des *
12062                                 sizeof(struct cfg80211_dscp_exception);
12063                         memcpy(qos_map->dscp_exception, pos, des_len);
12064                         qos_map->num_des = num_des;
12065                         for (des = 0; des < num_des; des++) {
12066                                 if (qos_map->dscp_exception[des].up > 7) {
12067                                         kfree(qos_map);
12068                                         return -EINVAL;
12069                                 }
12070                         }
12071                         pos += des_len;
12072                 }
12073                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
12074         }
12075
12076         wdev_lock(dev->ieee80211_ptr);
12077         ret = nl80211_key_allowed(dev->ieee80211_ptr);
12078         if (!ret)
12079                 ret = rdev_set_qos_map(rdev, dev, qos_map);
12080         wdev_unlock(dev->ieee80211_ptr);
12081
12082         kfree(qos_map);
12083         return ret;
12084 }
12085
12086 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
12087 {
12088         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12089         struct net_device *dev = info->user_ptr[1];
12090         struct wireless_dev *wdev = dev->ieee80211_ptr;
12091         const u8 *peer;
12092         u8 tsid, up;
12093         u16 admitted_time = 0;
12094         int err;
12095
12096         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
12097                 return -EOPNOTSUPP;
12098
12099         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
12100             !info->attrs[NL80211_ATTR_USER_PRIO])
12101                 return -EINVAL;
12102
12103         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
12104         if (tsid >= IEEE80211_NUM_TIDS)
12105                 return -EINVAL;
12106
12107         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
12108         if (up >= IEEE80211_NUM_UPS)
12109                 return -EINVAL;
12110
12111         /* WMM uses TIDs 0-7 even for TSPEC */
12112         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
12113                 /* TODO: handle 802.11 TSPEC/admission control
12114                  * need more attributes for that (e.g. BA session requirement);
12115                  * change the WMM adminssion test above to allow both then
12116                  */
12117                 return -EINVAL;
12118         }
12119
12120         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
12121
12122         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
12123                 admitted_time =
12124                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
12125                 if (!admitted_time)
12126                         return -EINVAL;
12127         }
12128
12129         wdev_lock(wdev);
12130         switch (wdev->iftype) {
12131         case NL80211_IFTYPE_STATION:
12132         case NL80211_IFTYPE_P2P_CLIENT:
12133                 if (wdev->current_bss)
12134                         break;
12135                 err = -ENOTCONN;
12136                 goto out;
12137         default:
12138                 err = -EOPNOTSUPP;
12139                 goto out;
12140         }
12141
12142         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
12143
12144  out:
12145         wdev_unlock(wdev);
12146         return err;
12147 }
12148
12149 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
12150 {
12151         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12152         struct net_device *dev = info->user_ptr[1];
12153         struct wireless_dev *wdev = dev->ieee80211_ptr;
12154         const u8 *peer;
12155         u8 tsid;
12156         int err;
12157
12158         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
12159                 return -EINVAL;
12160
12161         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
12162         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
12163
12164         wdev_lock(wdev);
12165         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
12166         wdev_unlock(wdev);
12167
12168         return err;
12169 }
12170
12171 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
12172                                        struct genl_info *info)
12173 {
12174         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12175         struct net_device *dev = info->user_ptr[1];
12176         struct wireless_dev *wdev = dev->ieee80211_ptr;
12177         struct cfg80211_chan_def chandef = {};
12178         const u8 *addr;
12179         u8 oper_class;
12180         int err;
12181
12182         if (!rdev->ops->tdls_channel_switch ||
12183             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
12184                 return -EOPNOTSUPP;
12185
12186         switch (dev->ieee80211_ptr->iftype) {
12187         case NL80211_IFTYPE_STATION:
12188         case NL80211_IFTYPE_P2P_CLIENT:
12189                 break;
12190         default:
12191                 return -EOPNOTSUPP;
12192         }
12193
12194         if (!info->attrs[NL80211_ATTR_MAC] ||
12195             !info->attrs[NL80211_ATTR_OPER_CLASS])
12196                 return -EINVAL;
12197
12198         err = nl80211_parse_chandef(rdev, info, &chandef);
12199         if (err)
12200                 return err;
12201
12202         /*
12203          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
12204          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
12205          * specification is not defined for them.
12206          */
12207         if (chandef.chan->band == NL80211_BAND_2GHZ &&
12208             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
12209             chandef.width != NL80211_CHAN_WIDTH_20)
12210                 return -EINVAL;
12211
12212         /* we will be active on the TDLS link */
12213         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
12214                                            wdev->iftype))
12215                 return -EINVAL;
12216
12217         /* don't allow switching to DFS channels */
12218         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
12219                 return -EINVAL;
12220
12221         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
12222         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
12223
12224         wdev_lock(wdev);
12225         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
12226         wdev_unlock(wdev);
12227
12228         return err;
12229 }
12230
12231 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
12232                                               struct genl_info *info)
12233 {
12234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12235         struct net_device *dev = info->user_ptr[1];
12236         struct wireless_dev *wdev = dev->ieee80211_ptr;
12237         const u8 *addr;
12238
12239         if (!rdev->ops->tdls_channel_switch ||
12240             !rdev->ops->tdls_cancel_channel_switch ||
12241             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
12242                 return -EOPNOTSUPP;
12243
12244         switch (dev->ieee80211_ptr->iftype) {
12245         case NL80211_IFTYPE_STATION:
12246         case NL80211_IFTYPE_P2P_CLIENT:
12247                 break;
12248         default:
12249                 return -EOPNOTSUPP;
12250         }
12251
12252         if (!info->attrs[NL80211_ATTR_MAC])
12253                 return -EINVAL;
12254
12255         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
12256
12257         wdev_lock(wdev);
12258         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
12259         wdev_unlock(wdev);
12260
12261         return 0;
12262 }
12263
12264 static int nl80211_set_multicast_to_unicast(struct sk_buff *skb,
12265                                             struct genl_info *info)
12266 {
12267         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12268         struct net_device *dev = info->user_ptr[1];
12269         struct wireless_dev *wdev = dev->ieee80211_ptr;
12270         const struct nlattr *nla;
12271         bool enabled;
12272
12273         if (!rdev->ops->set_multicast_to_unicast)
12274                 return -EOPNOTSUPP;
12275
12276         if (wdev->iftype != NL80211_IFTYPE_AP &&
12277             wdev->iftype != NL80211_IFTYPE_P2P_GO)
12278                 return -EOPNOTSUPP;
12279
12280         nla = info->attrs[NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED];
12281         enabled = nla_get_flag(nla);
12282
12283         return rdev_set_multicast_to_unicast(rdev, dev, enabled);
12284 }
12285
12286 static int nl80211_set_pmk(struct sk_buff *skb, struct genl_info *info)
12287 {
12288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12289         struct net_device *dev = info->user_ptr[1];
12290         struct wireless_dev *wdev = dev->ieee80211_ptr;
12291         struct cfg80211_pmk_conf pmk_conf = {};
12292         int ret;
12293
12294         if (wdev->iftype != NL80211_IFTYPE_STATION &&
12295             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
12296                 return -EOPNOTSUPP;
12297
12298         if (!wiphy_ext_feature_isset(&rdev->wiphy,
12299                                      NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
12300                 return -EOPNOTSUPP;
12301
12302         if (!info->attrs[NL80211_ATTR_MAC] || !info->attrs[NL80211_ATTR_PMK])
12303                 return -EINVAL;
12304
12305         wdev_lock(wdev);
12306         if (!wdev->current_bss) {
12307                 ret = -ENOTCONN;
12308                 goto out;
12309         }
12310
12311         pmk_conf.aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
12312         if (memcmp(pmk_conf.aa, wdev->current_bss->pub.bssid, ETH_ALEN)) {
12313                 ret = -EINVAL;
12314                 goto out;
12315         }
12316
12317         pmk_conf.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
12318         pmk_conf.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
12319         if (pmk_conf.pmk_len != WLAN_PMK_LEN &&
12320             pmk_conf.pmk_len != WLAN_PMK_LEN_SUITE_B_192) {
12321                 ret = -EINVAL;
12322                 goto out;
12323         }
12324
12325         if (info->attrs[NL80211_ATTR_PMKR0_NAME]) {
12326                 int r0_name_len = nla_len(info->attrs[NL80211_ATTR_PMKR0_NAME]);
12327
12328                 if (r0_name_len != WLAN_PMK_NAME_LEN) {
12329                         ret = -EINVAL;
12330                         goto out;
12331                 }
12332
12333                 pmk_conf.pmk_r0_name =
12334                         nla_data(info->attrs[NL80211_ATTR_PMKR0_NAME]);
12335         }
12336
12337         ret = rdev_set_pmk(rdev, dev, &pmk_conf);
12338 out:
12339         wdev_unlock(wdev);
12340         return ret;
12341 }
12342
12343 static int nl80211_del_pmk(struct sk_buff *skb, struct genl_info *info)
12344 {
12345         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12346         struct net_device *dev = info->user_ptr[1];
12347         struct wireless_dev *wdev = dev->ieee80211_ptr;
12348         const u8 *aa;
12349         int ret;
12350
12351         if (wdev->iftype != NL80211_IFTYPE_STATION &&
12352             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
12353                 return -EOPNOTSUPP;
12354
12355         if (!wiphy_ext_feature_isset(&rdev->wiphy,
12356                                      NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
12357                 return -EOPNOTSUPP;
12358
12359         if (!info->attrs[NL80211_ATTR_MAC])
12360                 return -EINVAL;
12361
12362         wdev_lock(wdev);
12363         aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
12364         ret = rdev_del_pmk(rdev, dev, aa);
12365         wdev_unlock(wdev);
12366
12367         return ret;
12368 }
12369
12370 #define NL80211_FLAG_NEED_WIPHY         0x01
12371 #define NL80211_FLAG_NEED_NETDEV        0x02
12372 #define NL80211_FLAG_NEED_RTNL          0x04
12373 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
12374 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
12375                                          NL80211_FLAG_CHECK_NETDEV_UP)
12376 #define NL80211_FLAG_NEED_WDEV          0x10
12377 /* If a netdev is associated, it must be UP, P2P must be started */
12378 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
12379                                          NL80211_FLAG_CHECK_NETDEV_UP)
12380 #define NL80211_FLAG_CLEAR_SKB          0x20
12381
12382 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
12383                             struct genl_info *info)
12384 {
12385         struct cfg80211_registered_device *rdev;
12386         struct wireless_dev *wdev;
12387         struct net_device *dev;
12388         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
12389
12390         if (rtnl)
12391                 rtnl_lock();
12392
12393         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
12394                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
12395                 if (IS_ERR(rdev)) {
12396                         if (rtnl)
12397                                 rtnl_unlock();
12398                         return PTR_ERR(rdev);
12399                 }
12400                 info->user_ptr[0] = rdev;
12401         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
12402                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
12403                 ASSERT_RTNL();
12404
12405                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
12406                                                   info->attrs);
12407                 if (IS_ERR(wdev)) {
12408                         if (rtnl)
12409                                 rtnl_unlock();
12410                         return PTR_ERR(wdev);
12411                 }
12412
12413                 dev = wdev->netdev;
12414                 rdev = wiphy_to_rdev(wdev->wiphy);
12415
12416                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
12417                         if (!dev) {
12418                                 if (rtnl)
12419                                         rtnl_unlock();
12420                                 return -EINVAL;
12421                         }
12422
12423                         info->user_ptr[1] = dev;
12424                 } else {
12425                         info->user_ptr[1] = wdev;
12426                 }
12427
12428                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
12429                     !wdev_running(wdev)) {
12430                         if (rtnl)
12431                                 rtnl_unlock();
12432                         return -ENETDOWN;
12433                 }
12434
12435                 if (dev)
12436                         dev_hold(dev);
12437
12438                 info->user_ptr[0] = rdev;
12439         }
12440
12441         return 0;
12442 }
12443
12444 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
12445                               struct genl_info *info)
12446 {
12447         if (info->user_ptr[1]) {
12448                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
12449                         struct wireless_dev *wdev = info->user_ptr[1];
12450
12451                         if (wdev->netdev)
12452                                 dev_put(wdev->netdev);
12453                 } else {
12454                         dev_put(info->user_ptr[1]);
12455                 }
12456         }
12457
12458         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
12459                 rtnl_unlock();
12460
12461         /* If needed, clear the netlink message payload from the SKB
12462          * as it might contain key data that shouldn't stick around on
12463          * the heap after the SKB is freed. The netlink message header
12464          * is still needed for further processing, so leave it intact.
12465          */
12466         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
12467                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
12468
12469                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
12470         }
12471 }
12472
12473 static const struct genl_ops nl80211_ops[] = {
12474         {
12475                 .cmd = NL80211_CMD_GET_WIPHY,
12476                 .doit = nl80211_get_wiphy,
12477                 .dumpit = nl80211_dump_wiphy,
12478                 .done = nl80211_dump_wiphy_done,
12479                 .policy = nl80211_policy,
12480                 /* can be retrieved by unprivileged users */
12481                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12482                                   NL80211_FLAG_NEED_RTNL,
12483         },
12484         {
12485                 .cmd = NL80211_CMD_SET_WIPHY,
12486                 .doit = nl80211_set_wiphy,
12487                 .policy = nl80211_policy,
12488                 .flags = GENL_UNS_ADMIN_PERM,
12489                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12490         },
12491         {
12492                 .cmd = NL80211_CMD_GET_INTERFACE,
12493                 .doit = nl80211_get_interface,
12494                 .dumpit = nl80211_dump_interface,
12495                 .policy = nl80211_policy,
12496                 /* can be retrieved by unprivileged users */
12497                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12498                                   NL80211_FLAG_NEED_RTNL,
12499         },
12500         {
12501                 .cmd = NL80211_CMD_SET_INTERFACE,
12502                 .doit = nl80211_set_interface,
12503                 .policy = nl80211_policy,
12504                 .flags = GENL_UNS_ADMIN_PERM,
12505                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12506                                   NL80211_FLAG_NEED_RTNL,
12507         },
12508         {
12509                 .cmd = NL80211_CMD_NEW_INTERFACE,
12510                 .doit = nl80211_new_interface,
12511                 .policy = nl80211_policy,
12512                 .flags = GENL_UNS_ADMIN_PERM,
12513                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12514                                   NL80211_FLAG_NEED_RTNL,
12515         },
12516         {
12517                 .cmd = NL80211_CMD_DEL_INTERFACE,
12518                 .doit = nl80211_del_interface,
12519                 .policy = nl80211_policy,
12520                 .flags = GENL_UNS_ADMIN_PERM,
12521                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12522                                   NL80211_FLAG_NEED_RTNL,
12523         },
12524         {
12525                 .cmd = NL80211_CMD_GET_KEY,
12526                 .doit = nl80211_get_key,
12527                 .policy = nl80211_policy,
12528                 .flags = GENL_UNS_ADMIN_PERM,
12529                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12530                                   NL80211_FLAG_NEED_RTNL,
12531         },
12532         {
12533                 .cmd = NL80211_CMD_SET_KEY,
12534                 .doit = nl80211_set_key,
12535                 .policy = nl80211_policy,
12536                 .flags = GENL_UNS_ADMIN_PERM,
12537                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12538                                   NL80211_FLAG_NEED_RTNL |
12539                                   NL80211_FLAG_CLEAR_SKB,
12540         },
12541         {
12542                 .cmd = NL80211_CMD_NEW_KEY,
12543                 .doit = nl80211_new_key,
12544                 .policy = nl80211_policy,
12545                 .flags = GENL_UNS_ADMIN_PERM,
12546                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12547                                   NL80211_FLAG_NEED_RTNL |
12548                                   NL80211_FLAG_CLEAR_SKB,
12549         },
12550         {
12551                 .cmd = NL80211_CMD_DEL_KEY,
12552                 .doit = nl80211_del_key,
12553                 .policy = nl80211_policy,
12554                 .flags = GENL_UNS_ADMIN_PERM,
12555                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12556                                   NL80211_FLAG_NEED_RTNL,
12557         },
12558         {
12559                 .cmd = NL80211_CMD_SET_BEACON,
12560                 .policy = nl80211_policy,
12561                 .flags = GENL_UNS_ADMIN_PERM,
12562                 .doit = nl80211_set_beacon,
12563                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12564                                   NL80211_FLAG_NEED_RTNL,
12565         },
12566         {
12567                 .cmd = NL80211_CMD_START_AP,
12568                 .policy = nl80211_policy,
12569                 .flags = GENL_UNS_ADMIN_PERM,
12570                 .doit = nl80211_start_ap,
12571                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12572                                   NL80211_FLAG_NEED_RTNL,
12573         },
12574         {
12575                 .cmd = NL80211_CMD_STOP_AP,
12576                 .policy = nl80211_policy,
12577                 .flags = GENL_UNS_ADMIN_PERM,
12578                 .doit = nl80211_stop_ap,
12579                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12580                                   NL80211_FLAG_NEED_RTNL,
12581         },
12582         {
12583                 .cmd = NL80211_CMD_GET_STATION,
12584                 .doit = nl80211_get_station,
12585                 .dumpit = nl80211_dump_station,
12586                 .policy = nl80211_policy,
12587                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12588                                   NL80211_FLAG_NEED_RTNL,
12589         },
12590         {
12591                 .cmd = NL80211_CMD_SET_STATION,
12592                 .doit = nl80211_set_station,
12593                 .policy = nl80211_policy,
12594                 .flags = GENL_UNS_ADMIN_PERM,
12595                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12596                                   NL80211_FLAG_NEED_RTNL,
12597         },
12598         {
12599                 .cmd = NL80211_CMD_NEW_STATION,
12600                 .doit = nl80211_new_station,
12601                 .policy = nl80211_policy,
12602                 .flags = GENL_UNS_ADMIN_PERM,
12603                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12604                                   NL80211_FLAG_NEED_RTNL,
12605         },
12606         {
12607                 .cmd = NL80211_CMD_DEL_STATION,
12608                 .doit = nl80211_del_station,
12609                 .policy = nl80211_policy,
12610                 .flags = GENL_UNS_ADMIN_PERM,
12611                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12612                                   NL80211_FLAG_NEED_RTNL,
12613         },
12614         {
12615                 .cmd = NL80211_CMD_GET_MPATH,
12616                 .doit = nl80211_get_mpath,
12617                 .dumpit = nl80211_dump_mpath,
12618                 .policy = nl80211_policy,
12619                 .flags = GENL_UNS_ADMIN_PERM,
12620                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12621                                   NL80211_FLAG_NEED_RTNL,
12622         },
12623         {
12624                 .cmd = NL80211_CMD_GET_MPP,
12625                 .doit = nl80211_get_mpp,
12626                 .dumpit = nl80211_dump_mpp,
12627                 .policy = nl80211_policy,
12628                 .flags = GENL_UNS_ADMIN_PERM,
12629                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12630                                   NL80211_FLAG_NEED_RTNL,
12631         },
12632         {
12633                 .cmd = NL80211_CMD_SET_MPATH,
12634                 .doit = nl80211_set_mpath,
12635                 .policy = nl80211_policy,
12636                 .flags = GENL_UNS_ADMIN_PERM,
12637                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12638                                   NL80211_FLAG_NEED_RTNL,
12639         },
12640         {
12641                 .cmd = NL80211_CMD_NEW_MPATH,
12642                 .doit = nl80211_new_mpath,
12643                 .policy = nl80211_policy,
12644                 .flags = GENL_UNS_ADMIN_PERM,
12645                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12646                                   NL80211_FLAG_NEED_RTNL,
12647         },
12648         {
12649                 .cmd = NL80211_CMD_DEL_MPATH,
12650                 .doit = nl80211_del_mpath,
12651                 .policy = nl80211_policy,
12652                 .flags = GENL_UNS_ADMIN_PERM,
12653                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12654                                   NL80211_FLAG_NEED_RTNL,
12655         },
12656         {
12657                 .cmd = NL80211_CMD_SET_BSS,
12658                 .doit = nl80211_set_bss,
12659                 .policy = nl80211_policy,
12660                 .flags = GENL_UNS_ADMIN_PERM,
12661                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12662                                   NL80211_FLAG_NEED_RTNL,
12663         },
12664         {
12665                 .cmd = NL80211_CMD_GET_REG,
12666                 .doit = nl80211_get_reg_do,
12667                 .dumpit = nl80211_get_reg_dump,
12668                 .policy = nl80211_policy,
12669                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12670                 /* can be retrieved by unprivileged users */
12671         },
12672 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
12673         {
12674                 .cmd = NL80211_CMD_SET_REG,
12675                 .doit = nl80211_set_reg,
12676                 .policy = nl80211_policy,
12677                 .flags = GENL_ADMIN_PERM,
12678                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12679         },
12680 #endif
12681         {
12682                 .cmd = NL80211_CMD_REQ_SET_REG,
12683                 .doit = nl80211_req_set_reg,
12684                 .policy = nl80211_policy,
12685                 .flags = GENL_ADMIN_PERM,
12686         },
12687         {
12688                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
12689                 .doit = nl80211_get_mesh_config,
12690                 .policy = nl80211_policy,
12691                 /* can be retrieved by unprivileged users */
12692                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12693                                   NL80211_FLAG_NEED_RTNL,
12694         },
12695         {
12696                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
12697                 .doit = nl80211_update_mesh_config,
12698                 .policy = nl80211_policy,
12699                 .flags = GENL_UNS_ADMIN_PERM,
12700                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12701                                   NL80211_FLAG_NEED_RTNL,
12702         },
12703         {
12704                 .cmd = NL80211_CMD_TRIGGER_SCAN,
12705                 .doit = nl80211_trigger_scan,
12706                 .policy = nl80211_policy,
12707                 .flags = GENL_UNS_ADMIN_PERM,
12708                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12709                                   NL80211_FLAG_NEED_RTNL,
12710         },
12711         {
12712                 .cmd = NL80211_CMD_ABORT_SCAN,
12713                 .doit = nl80211_abort_scan,
12714                 .policy = nl80211_policy,
12715                 .flags = GENL_UNS_ADMIN_PERM,
12716                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12717                                   NL80211_FLAG_NEED_RTNL,
12718         },
12719         {
12720                 .cmd = NL80211_CMD_GET_SCAN,
12721                 .policy = nl80211_policy,
12722                 .dumpit = nl80211_dump_scan,
12723         },
12724         {
12725                 .cmd = NL80211_CMD_START_SCHED_SCAN,
12726                 .doit = nl80211_start_sched_scan,
12727                 .policy = nl80211_policy,
12728                 .flags = GENL_UNS_ADMIN_PERM,
12729                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12730                                   NL80211_FLAG_NEED_RTNL,
12731         },
12732         {
12733                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
12734                 .doit = nl80211_stop_sched_scan,
12735                 .policy = nl80211_policy,
12736                 .flags = GENL_UNS_ADMIN_PERM,
12737                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12738                                   NL80211_FLAG_NEED_RTNL,
12739         },
12740         {
12741                 .cmd = NL80211_CMD_AUTHENTICATE,
12742                 .doit = nl80211_authenticate,
12743                 .policy = nl80211_policy,
12744                 .flags = GENL_UNS_ADMIN_PERM,
12745                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12746                                   NL80211_FLAG_NEED_RTNL |
12747                                   NL80211_FLAG_CLEAR_SKB,
12748         },
12749         {
12750                 .cmd = NL80211_CMD_ASSOCIATE,
12751                 .doit = nl80211_associate,
12752                 .policy = nl80211_policy,
12753                 .flags = GENL_UNS_ADMIN_PERM,
12754                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12755                                   NL80211_FLAG_NEED_RTNL,
12756         },
12757         {
12758                 .cmd = NL80211_CMD_DEAUTHENTICATE,
12759                 .doit = nl80211_deauthenticate,
12760                 .policy = nl80211_policy,
12761                 .flags = GENL_UNS_ADMIN_PERM,
12762                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12763                                   NL80211_FLAG_NEED_RTNL,
12764         },
12765         {
12766                 .cmd = NL80211_CMD_DISASSOCIATE,
12767                 .doit = nl80211_disassociate,
12768                 .policy = nl80211_policy,
12769                 .flags = GENL_UNS_ADMIN_PERM,
12770                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12771                                   NL80211_FLAG_NEED_RTNL,
12772         },
12773         {
12774                 .cmd = NL80211_CMD_JOIN_IBSS,
12775                 .doit = nl80211_join_ibss,
12776                 .policy = nl80211_policy,
12777                 .flags = GENL_UNS_ADMIN_PERM,
12778                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12779                                   NL80211_FLAG_NEED_RTNL,
12780         },
12781         {
12782                 .cmd = NL80211_CMD_LEAVE_IBSS,
12783                 .doit = nl80211_leave_ibss,
12784                 .policy = nl80211_policy,
12785                 .flags = GENL_UNS_ADMIN_PERM,
12786                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12787                                   NL80211_FLAG_NEED_RTNL,
12788         },
12789 #ifdef CONFIG_NL80211_TESTMODE
12790         {
12791                 .cmd = NL80211_CMD_TESTMODE,
12792                 .doit = nl80211_testmode_do,
12793                 .dumpit = nl80211_testmode_dump,
12794                 .policy = nl80211_policy,
12795                 .flags = GENL_UNS_ADMIN_PERM,
12796                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12797                                   NL80211_FLAG_NEED_RTNL,
12798         },
12799 #endif
12800         {
12801                 .cmd = NL80211_CMD_CONNECT,
12802                 .doit = nl80211_connect,
12803                 .policy = nl80211_policy,
12804                 .flags = GENL_UNS_ADMIN_PERM,
12805                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12806                                   NL80211_FLAG_NEED_RTNL,
12807         },
12808         {
12809                 .cmd = NL80211_CMD_UPDATE_CONNECT_PARAMS,
12810                 .doit = nl80211_update_connect_params,
12811                 .policy = nl80211_policy,
12812                 .flags = GENL_ADMIN_PERM,
12813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12814                                   NL80211_FLAG_NEED_RTNL,
12815         },
12816         {
12817                 .cmd = NL80211_CMD_DISCONNECT,
12818                 .doit = nl80211_disconnect,
12819                 .policy = nl80211_policy,
12820                 .flags = GENL_UNS_ADMIN_PERM,
12821                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12822                                   NL80211_FLAG_NEED_RTNL,
12823         },
12824         {
12825                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
12826                 .doit = nl80211_wiphy_netns,
12827                 .policy = nl80211_policy,
12828                 .flags = GENL_UNS_ADMIN_PERM,
12829                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12830                                   NL80211_FLAG_NEED_RTNL,
12831         },
12832         {
12833                 .cmd = NL80211_CMD_GET_SURVEY,
12834                 .policy = nl80211_policy,
12835                 .dumpit = nl80211_dump_survey,
12836         },
12837         {
12838                 .cmd = NL80211_CMD_SET_PMKSA,
12839                 .doit = nl80211_setdel_pmksa,
12840                 .policy = nl80211_policy,
12841                 .flags = GENL_UNS_ADMIN_PERM,
12842                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12843                                   NL80211_FLAG_NEED_RTNL,
12844         },
12845         {
12846                 .cmd = NL80211_CMD_DEL_PMKSA,
12847                 .doit = nl80211_setdel_pmksa,
12848                 .policy = nl80211_policy,
12849                 .flags = GENL_UNS_ADMIN_PERM,
12850                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12851                                   NL80211_FLAG_NEED_RTNL,
12852         },
12853         {
12854                 .cmd = NL80211_CMD_FLUSH_PMKSA,
12855                 .doit = nl80211_flush_pmksa,
12856                 .policy = nl80211_policy,
12857                 .flags = GENL_UNS_ADMIN_PERM,
12858                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12859                                   NL80211_FLAG_NEED_RTNL,
12860         },
12861         {
12862                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
12863                 .doit = nl80211_remain_on_channel,
12864                 .policy = nl80211_policy,
12865                 .flags = GENL_UNS_ADMIN_PERM,
12866                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12867                                   NL80211_FLAG_NEED_RTNL,
12868         },
12869         {
12870                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12871                 .doit = nl80211_cancel_remain_on_channel,
12872                 .policy = nl80211_policy,
12873                 .flags = GENL_UNS_ADMIN_PERM,
12874                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12875                                   NL80211_FLAG_NEED_RTNL,
12876         },
12877         {
12878                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
12879                 .doit = nl80211_set_tx_bitrate_mask,
12880                 .policy = nl80211_policy,
12881                 .flags = GENL_UNS_ADMIN_PERM,
12882                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12883                                   NL80211_FLAG_NEED_RTNL,
12884         },
12885         {
12886                 .cmd = NL80211_CMD_REGISTER_FRAME,
12887                 .doit = nl80211_register_mgmt,
12888                 .policy = nl80211_policy,
12889                 .flags = GENL_UNS_ADMIN_PERM,
12890                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12891                                   NL80211_FLAG_NEED_RTNL,
12892         },
12893         {
12894                 .cmd = NL80211_CMD_FRAME,
12895                 .doit = nl80211_tx_mgmt,
12896                 .policy = nl80211_policy,
12897                 .flags = GENL_UNS_ADMIN_PERM,
12898                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12899                                   NL80211_FLAG_NEED_RTNL,
12900         },
12901         {
12902                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
12903                 .doit = nl80211_tx_mgmt_cancel_wait,
12904                 .policy = nl80211_policy,
12905                 .flags = GENL_UNS_ADMIN_PERM,
12906                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12907                                   NL80211_FLAG_NEED_RTNL,
12908         },
12909         {
12910                 .cmd = NL80211_CMD_SET_POWER_SAVE,
12911                 .doit = nl80211_set_power_save,
12912                 .policy = nl80211_policy,
12913                 .flags = GENL_UNS_ADMIN_PERM,
12914                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12915                                   NL80211_FLAG_NEED_RTNL,
12916         },
12917         {
12918                 .cmd = NL80211_CMD_GET_POWER_SAVE,
12919                 .doit = nl80211_get_power_save,
12920                 .policy = nl80211_policy,
12921                 /* can be retrieved by unprivileged users */
12922                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12923                                   NL80211_FLAG_NEED_RTNL,
12924         },
12925         {
12926                 .cmd = NL80211_CMD_SET_CQM,
12927                 .doit = nl80211_set_cqm,
12928                 .policy = nl80211_policy,
12929                 .flags = GENL_UNS_ADMIN_PERM,
12930                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12931                                   NL80211_FLAG_NEED_RTNL,
12932         },
12933         {
12934                 .cmd = NL80211_CMD_SET_CHANNEL,
12935                 .doit = nl80211_set_channel,
12936                 .policy = nl80211_policy,
12937                 .flags = GENL_UNS_ADMIN_PERM,
12938                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12939                                   NL80211_FLAG_NEED_RTNL,
12940         },
12941         {
12942                 .cmd = NL80211_CMD_SET_WDS_PEER,
12943                 .doit = nl80211_set_wds_peer,
12944                 .policy = nl80211_policy,
12945                 .flags = GENL_UNS_ADMIN_PERM,
12946                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12947                                   NL80211_FLAG_NEED_RTNL,
12948         },
12949         {
12950                 .cmd = NL80211_CMD_JOIN_MESH,
12951                 .doit = nl80211_join_mesh,
12952                 .policy = nl80211_policy,
12953                 .flags = GENL_UNS_ADMIN_PERM,
12954                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12955                                   NL80211_FLAG_NEED_RTNL,
12956         },
12957         {
12958                 .cmd = NL80211_CMD_LEAVE_MESH,
12959                 .doit = nl80211_leave_mesh,
12960                 .policy = nl80211_policy,
12961                 .flags = GENL_UNS_ADMIN_PERM,
12962                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12963                                   NL80211_FLAG_NEED_RTNL,
12964         },
12965         {
12966                 .cmd = NL80211_CMD_JOIN_OCB,
12967                 .doit = nl80211_join_ocb,
12968                 .policy = nl80211_policy,
12969                 .flags = GENL_UNS_ADMIN_PERM,
12970                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12971                                   NL80211_FLAG_NEED_RTNL,
12972         },
12973         {
12974                 .cmd = NL80211_CMD_LEAVE_OCB,
12975                 .doit = nl80211_leave_ocb,
12976                 .policy = nl80211_policy,
12977                 .flags = GENL_UNS_ADMIN_PERM,
12978                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12979                                   NL80211_FLAG_NEED_RTNL,
12980         },
12981 #ifdef CONFIG_PM
12982         {
12983                 .cmd = NL80211_CMD_GET_WOWLAN,
12984                 .doit = nl80211_get_wowlan,
12985                 .policy = nl80211_policy,
12986                 /* can be retrieved by unprivileged users */
12987                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12988                                   NL80211_FLAG_NEED_RTNL,
12989         },
12990         {
12991                 .cmd = NL80211_CMD_SET_WOWLAN,
12992                 .doit = nl80211_set_wowlan,
12993                 .policy = nl80211_policy,
12994                 .flags = GENL_UNS_ADMIN_PERM,
12995                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12996                                   NL80211_FLAG_NEED_RTNL,
12997         },
12998 #endif
12999         {
13000                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
13001                 .doit = nl80211_set_rekey_data,
13002                 .policy = nl80211_policy,
13003                 .flags = GENL_UNS_ADMIN_PERM,
13004                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13005                                   NL80211_FLAG_NEED_RTNL |
13006                                   NL80211_FLAG_CLEAR_SKB,
13007         },
13008         {
13009                 .cmd = NL80211_CMD_TDLS_MGMT,
13010                 .doit = nl80211_tdls_mgmt,
13011                 .policy = nl80211_policy,
13012                 .flags = GENL_UNS_ADMIN_PERM,
13013                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13014                                   NL80211_FLAG_NEED_RTNL,
13015         },
13016         {
13017                 .cmd = NL80211_CMD_TDLS_OPER,
13018                 .doit = nl80211_tdls_oper,
13019                 .policy = nl80211_policy,
13020                 .flags = GENL_UNS_ADMIN_PERM,
13021                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13022                                   NL80211_FLAG_NEED_RTNL,
13023         },
13024         {
13025                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
13026                 .doit = nl80211_register_unexpected_frame,
13027                 .policy = nl80211_policy,
13028                 .flags = GENL_UNS_ADMIN_PERM,
13029                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13030                                   NL80211_FLAG_NEED_RTNL,
13031         },
13032         {
13033                 .cmd = NL80211_CMD_PROBE_CLIENT,
13034                 .doit = nl80211_probe_client,
13035                 .policy = nl80211_policy,
13036                 .flags = GENL_UNS_ADMIN_PERM,
13037                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13038                                   NL80211_FLAG_NEED_RTNL,
13039         },
13040         {
13041                 .cmd = NL80211_CMD_REGISTER_BEACONS,
13042                 .doit = nl80211_register_beacons,
13043                 .policy = nl80211_policy,
13044                 .flags = GENL_UNS_ADMIN_PERM,
13045                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13046                                   NL80211_FLAG_NEED_RTNL,
13047         },
13048         {
13049                 .cmd = NL80211_CMD_SET_NOACK_MAP,
13050                 .doit = nl80211_set_noack_map,
13051                 .policy = nl80211_policy,
13052                 .flags = GENL_UNS_ADMIN_PERM,
13053                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13054                                   NL80211_FLAG_NEED_RTNL,
13055         },
13056         {
13057                 .cmd = NL80211_CMD_START_P2P_DEVICE,
13058                 .doit = nl80211_start_p2p_device,
13059                 .policy = nl80211_policy,
13060                 .flags = GENL_UNS_ADMIN_PERM,
13061                 .internal_flags = NL80211_FLAG_NEED_WDEV |
13062                                   NL80211_FLAG_NEED_RTNL,
13063         },
13064         {
13065                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
13066                 .doit = nl80211_stop_p2p_device,
13067                 .policy = nl80211_policy,
13068                 .flags = GENL_UNS_ADMIN_PERM,
13069                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13070                                   NL80211_FLAG_NEED_RTNL,
13071         },
13072         {
13073                 .cmd = NL80211_CMD_START_NAN,
13074                 .doit = nl80211_start_nan,
13075                 .policy = nl80211_policy,
13076                 .flags = GENL_ADMIN_PERM,
13077                 .internal_flags = NL80211_FLAG_NEED_WDEV |
13078                                   NL80211_FLAG_NEED_RTNL,
13079         },
13080         {
13081                 .cmd = NL80211_CMD_STOP_NAN,
13082                 .doit = nl80211_stop_nan,
13083                 .policy = nl80211_policy,
13084                 .flags = GENL_ADMIN_PERM,
13085                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13086                                   NL80211_FLAG_NEED_RTNL,
13087         },
13088         {
13089                 .cmd = NL80211_CMD_ADD_NAN_FUNCTION,
13090                 .doit = nl80211_nan_add_func,
13091                 .policy = nl80211_policy,
13092                 .flags = GENL_ADMIN_PERM,
13093                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13094                                   NL80211_FLAG_NEED_RTNL,
13095         },
13096         {
13097                 .cmd = NL80211_CMD_DEL_NAN_FUNCTION,
13098                 .doit = nl80211_nan_del_func,
13099                 .policy = nl80211_policy,
13100                 .flags = GENL_ADMIN_PERM,
13101                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13102                                   NL80211_FLAG_NEED_RTNL,
13103         },
13104         {
13105                 .cmd = NL80211_CMD_CHANGE_NAN_CONFIG,
13106                 .doit = nl80211_nan_change_config,
13107                 .policy = nl80211_policy,
13108                 .flags = GENL_ADMIN_PERM,
13109                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13110                                   NL80211_FLAG_NEED_RTNL,
13111         },
13112         {
13113                 .cmd = NL80211_CMD_SET_MCAST_RATE,
13114                 .doit = nl80211_set_mcast_rate,
13115                 .policy = nl80211_policy,
13116                 .flags = GENL_UNS_ADMIN_PERM,
13117                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13118                                   NL80211_FLAG_NEED_RTNL,
13119         },
13120         {
13121                 .cmd = NL80211_CMD_SET_MAC_ACL,
13122                 .doit = nl80211_set_mac_acl,
13123                 .policy = nl80211_policy,
13124                 .flags = GENL_UNS_ADMIN_PERM,
13125                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13126                                   NL80211_FLAG_NEED_RTNL,
13127         },
13128         {
13129                 .cmd = NL80211_CMD_RADAR_DETECT,
13130                 .doit = nl80211_start_radar_detection,
13131                 .policy = nl80211_policy,
13132                 .flags = GENL_UNS_ADMIN_PERM,
13133                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13134                                   NL80211_FLAG_NEED_RTNL,
13135         },
13136         {
13137                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
13138                 .doit = nl80211_get_protocol_features,
13139                 .policy = nl80211_policy,
13140         },
13141         {
13142                 .cmd = NL80211_CMD_UPDATE_FT_IES,
13143                 .doit = nl80211_update_ft_ies,
13144                 .policy = nl80211_policy,
13145                 .flags = GENL_UNS_ADMIN_PERM,
13146                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13147                                   NL80211_FLAG_NEED_RTNL,
13148         },
13149         {
13150                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
13151                 .doit = nl80211_crit_protocol_start,
13152                 .policy = nl80211_policy,
13153                 .flags = GENL_UNS_ADMIN_PERM,
13154                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13155                                   NL80211_FLAG_NEED_RTNL,
13156         },
13157         {
13158                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
13159                 .doit = nl80211_crit_protocol_stop,
13160                 .policy = nl80211_policy,
13161                 .flags = GENL_UNS_ADMIN_PERM,
13162                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13163                                   NL80211_FLAG_NEED_RTNL,
13164         },
13165         {
13166                 .cmd = NL80211_CMD_GET_COALESCE,
13167                 .doit = nl80211_get_coalesce,
13168                 .policy = nl80211_policy,
13169                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13170                                   NL80211_FLAG_NEED_RTNL,
13171         },
13172         {
13173                 .cmd = NL80211_CMD_SET_COALESCE,
13174                 .doit = nl80211_set_coalesce,
13175                 .policy = nl80211_policy,
13176                 .flags = GENL_UNS_ADMIN_PERM,
13177                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13178                                   NL80211_FLAG_NEED_RTNL,
13179         },
13180         {
13181                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
13182                 .doit = nl80211_channel_switch,
13183                 .policy = nl80211_policy,
13184                 .flags = GENL_UNS_ADMIN_PERM,
13185                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13186                                   NL80211_FLAG_NEED_RTNL,
13187         },
13188         {
13189                 .cmd = NL80211_CMD_VENDOR,
13190                 .doit = nl80211_vendor_cmd,
13191                 .dumpit = nl80211_vendor_cmd_dump,
13192                 .policy = nl80211_policy,
13193                 .flags = GENL_UNS_ADMIN_PERM,
13194                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13195                                   NL80211_FLAG_NEED_RTNL,
13196         },
13197         {
13198                 .cmd = NL80211_CMD_SET_QOS_MAP,
13199                 .doit = nl80211_set_qos_map,
13200                 .policy = nl80211_policy,
13201                 .flags = GENL_UNS_ADMIN_PERM,
13202                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13203                                   NL80211_FLAG_NEED_RTNL,
13204         },
13205         {
13206                 .cmd = NL80211_CMD_ADD_TX_TS,
13207                 .doit = nl80211_add_tx_ts,
13208                 .policy = nl80211_policy,
13209                 .flags = GENL_UNS_ADMIN_PERM,
13210                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13211                                   NL80211_FLAG_NEED_RTNL,
13212         },
13213         {
13214                 .cmd = NL80211_CMD_DEL_TX_TS,
13215                 .doit = nl80211_del_tx_ts,
13216                 .policy = nl80211_policy,
13217                 .flags = GENL_UNS_ADMIN_PERM,
13218                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13219                                   NL80211_FLAG_NEED_RTNL,
13220         },
13221         {
13222                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
13223                 .doit = nl80211_tdls_channel_switch,
13224                 .policy = nl80211_policy,
13225                 .flags = GENL_UNS_ADMIN_PERM,
13226                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13227                                   NL80211_FLAG_NEED_RTNL,
13228         },
13229         {
13230                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
13231                 .doit = nl80211_tdls_cancel_channel_switch,
13232                 .policy = nl80211_policy,
13233                 .flags = GENL_UNS_ADMIN_PERM,
13234                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13235                                   NL80211_FLAG_NEED_RTNL,
13236         },
13237         {
13238                 .cmd = NL80211_CMD_SET_MULTICAST_TO_UNICAST,
13239                 .doit = nl80211_set_multicast_to_unicast,
13240                 .policy = nl80211_policy,
13241                 .flags = GENL_UNS_ADMIN_PERM,
13242                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13243                                   NL80211_FLAG_NEED_RTNL,
13244         },
13245         {
13246                 .cmd = NL80211_CMD_SET_PMK,
13247                 .doit = nl80211_set_pmk,
13248                 .policy = nl80211_policy,
13249                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13250                                   NL80211_FLAG_NEED_RTNL,
13251         },
13252         {
13253                 .cmd = NL80211_CMD_DEL_PMK,
13254                 .doit = nl80211_del_pmk,
13255                 .policy = nl80211_policy,
13256                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13257                                   NL80211_FLAG_NEED_RTNL,
13258         },
13259
13260 };
13261
13262 static struct genl_family nl80211_fam __ro_after_init = {
13263         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
13264         .hdrsize = 0,                   /* no private header */
13265         .version = 1,                   /* no particular meaning now */
13266         .maxattr = NL80211_ATTR_MAX,
13267         .netnsok = true,
13268         .pre_doit = nl80211_pre_doit,
13269         .post_doit = nl80211_post_doit,
13270         .module = THIS_MODULE,
13271         .ops = nl80211_ops,
13272         .n_ops = ARRAY_SIZE(nl80211_ops),
13273         .mcgrps = nl80211_mcgrps,
13274         .n_mcgrps = ARRAY_SIZE(nl80211_mcgrps),
13275 };
13276
13277 /* notification functions */
13278
13279 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
13280                           enum nl80211_commands cmd)
13281 {
13282         struct sk_buff *msg;
13283         struct nl80211_dump_wiphy_state state = {};
13284
13285         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
13286                 cmd != NL80211_CMD_DEL_WIPHY);
13287
13288         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13289         if (!msg)
13290                 return;
13291
13292         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
13293                 nlmsg_free(msg);
13294                 return;
13295         }
13296
13297         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13298                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
13299 }
13300
13301 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
13302                                 struct wireless_dev *wdev,
13303                                 enum nl80211_commands cmd)
13304 {
13305         struct sk_buff *msg;
13306
13307         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
13308                 cmd != NL80211_CMD_DEL_INTERFACE);
13309
13310         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13311         if (!msg)
13312                 return;
13313
13314         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
13315                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
13316                 nlmsg_free(msg);
13317                 return;
13318         }
13319
13320         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13321                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
13322 }
13323
13324 static int nl80211_add_scan_req(struct sk_buff *msg,
13325                                 struct cfg80211_registered_device *rdev)
13326 {
13327         struct cfg80211_scan_request *req = rdev->scan_req;
13328         struct nlattr *nest;
13329         int i;
13330
13331         if (WARN_ON(!req))
13332                 return 0;
13333
13334         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
13335         if (!nest)
13336                 goto nla_put_failure;
13337         for (i = 0; i < req->n_ssids; i++) {
13338                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
13339                         goto nla_put_failure;
13340         }
13341         nla_nest_end(msg, nest);
13342
13343         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
13344         if (!nest)
13345                 goto nla_put_failure;
13346         for (i = 0; i < req->n_channels; i++) {
13347                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
13348                         goto nla_put_failure;
13349         }
13350         nla_nest_end(msg, nest);
13351
13352         if (req->ie &&
13353             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
13354                 goto nla_put_failure;
13355
13356         if (req->flags &&
13357             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
13358                 goto nla_put_failure;
13359
13360         if (req->info.scan_start_tsf &&
13361             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
13362                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
13363              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
13364                      req->info.tsf_bssid)))
13365                 goto nla_put_failure;
13366
13367         return 0;
13368  nla_put_failure:
13369         return -ENOBUFS;
13370 }
13371
13372 static int nl80211_prep_scan_msg(struct sk_buff *msg,
13373                                  struct cfg80211_registered_device *rdev,
13374                                  struct wireless_dev *wdev,
13375                                  u32 portid, u32 seq, int flags,
13376                                  u32 cmd)
13377 {
13378         void *hdr;
13379
13380         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
13381         if (!hdr)
13382                 return -1;
13383
13384         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13385             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13386                                          wdev->netdev->ifindex)) ||
13387             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13388                               NL80211_ATTR_PAD))
13389                 goto nla_put_failure;
13390
13391         /* ignore errors and send incomplete event anyway */
13392         nl80211_add_scan_req(msg, rdev);
13393
13394         genlmsg_end(msg, hdr);
13395         return 0;
13396
13397  nla_put_failure:
13398         genlmsg_cancel(msg, hdr);
13399         return -EMSGSIZE;
13400 }
13401
13402 static int
13403 nl80211_prep_sched_scan_msg(struct sk_buff *msg,
13404                             struct cfg80211_sched_scan_request *req, u32 cmd)
13405 {
13406         void *hdr;
13407
13408         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13409         if (!hdr)
13410                 return -1;
13411
13412         if (nla_put_u32(msg, NL80211_ATTR_WIPHY,
13413                         wiphy_to_rdev(req->wiphy)->wiphy_idx) ||
13414             nla_put_u32(msg, NL80211_ATTR_IFINDEX, req->dev->ifindex) ||
13415             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->reqid,
13416                               NL80211_ATTR_PAD))
13417                 goto nla_put_failure;
13418
13419         genlmsg_end(msg, hdr);
13420         return 0;
13421
13422  nla_put_failure:
13423         genlmsg_cancel(msg, hdr);
13424         return -EMSGSIZE;
13425 }
13426
13427 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
13428                              struct wireless_dev *wdev)
13429 {
13430         struct sk_buff *msg;
13431
13432         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13433         if (!msg)
13434                 return;
13435
13436         if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
13437                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
13438                 nlmsg_free(msg);
13439                 return;
13440         }
13441
13442         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13443                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13444 }
13445
13446 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
13447                                        struct wireless_dev *wdev, bool aborted)
13448 {
13449         struct sk_buff *msg;
13450
13451         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13452         if (!msg)
13453                 return NULL;
13454
13455         if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
13456                                   aborted ? NL80211_CMD_SCAN_ABORTED :
13457                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
13458                 nlmsg_free(msg);
13459                 return NULL;
13460         }
13461
13462         return msg;
13463 }
13464
13465 /* send message created by nl80211_build_scan_msg() */
13466 void nl80211_send_scan_msg(struct cfg80211_registered_device *rdev,
13467                            struct sk_buff *msg)
13468 {
13469         if (!msg)
13470                 return;
13471
13472         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13473                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13474 }
13475
13476 void nl80211_send_sched_scan(struct cfg80211_sched_scan_request *req, u32 cmd)
13477 {
13478         struct sk_buff *msg;
13479
13480         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13481         if (!msg)
13482                 return;
13483
13484         if (nl80211_prep_sched_scan_msg(msg, req, cmd) < 0) {
13485                 nlmsg_free(msg);
13486                 return;
13487         }
13488
13489         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(req->wiphy), msg, 0,
13490                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13491 }
13492
13493 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
13494                                           struct regulatory_request *request)
13495 {
13496         /* Userspace can always count this one always being set */
13497         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
13498                 goto nla_put_failure;
13499
13500         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
13501                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13502                                NL80211_REGDOM_TYPE_WORLD))
13503                         goto nla_put_failure;
13504         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
13505                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13506                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
13507                         goto nla_put_failure;
13508         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
13509                    request->intersect) {
13510                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13511                                NL80211_REGDOM_TYPE_INTERSECTION))
13512                         goto nla_put_failure;
13513         } else {
13514                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13515                                NL80211_REGDOM_TYPE_COUNTRY) ||
13516                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
13517                                    request->alpha2))
13518                         goto nla_put_failure;
13519         }
13520
13521         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
13522                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
13523
13524                 if (wiphy &&
13525                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
13526                         goto nla_put_failure;
13527
13528                 if (wiphy &&
13529                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
13530                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
13531                         goto nla_put_failure;
13532         }
13533
13534         return true;
13535
13536 nla_put_failure:
13537         return false;
13538 }
13539
13540 /*
13541  * This can happen on global regulatory changes or device specific settings
13542  * based on custom regulatory domains.
13543  */
13544 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
13545                                      struct regulatory_request *request)
13546 {
13547         struct sk_buff *msg;
13548         void *hdr;
13549
13550         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13551         if (!msg)
13552                 return;
13553
13554         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
13555         if (!hdr) {
13556                 nlmsg_free(msg);
13557                 return;
13558         }
13559
13560         if (nl80211_reg_change_event_fill(msg, request) == false)
13561                 goto nla_put_failure;
13562
13563         genlmsg_end(msg, hdr);
13564
13565         rcu_read_lock();
13566         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
13567                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
13568         rcu_read_unlock();
13569
13570         return;
13571
13572 nla_put_failure:
13573         genlmsg_cancel(msg, hdr);
13574         nlmsg_free(msg);
13575 }
13576
13577 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
13578                                     struct net_device *netdev,
13579                                     const u8 *buf, size_t len,
13580                                     enum nl80211_commands cmd, gfp_t gfp,
13581                                     int uapsd_queues)
13582 {
13583         struct sk_buff *msg;
13584         void *hdr;
13585
13586         msg = nlmsg_new(100 + len, gfp);
13587         if (!msg)
13588                 return;
13589
13590         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13591         if (!hdr) {
13592                 nlmsg_free(msg);
13593                 return;
13594         }
13595
13596         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13597             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13598             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
13599                 goto nla_put_failure;
13600
13601         if (uapsd_queues >= 0) {
13602                 struct nlattr *nla_wmm =
13603                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
13604                 if (!nla_wmm)
13605                         goto nla_put_failure;
13606
13607                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
13608                                uapsd_queues))
13609                         goto nla_put_failure;
13610
13611                 nla_nest_end(msg, nla_wmm);
13612         }
13613
13614         genlmsg_end(msg, hdr);
13615
13616         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13617                                 NL80211_MCGRP_MLME, gfp);
13618         return;
13619
13620  nla_put_failure:
13621         genlmsg_cancel(msg, hdr);
13622         nlmsg_free(msg);
13623 }
13624
13625 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
13626                           struct net_device *netdev, const u8 *buf,
13627                           size_t len, gfp_t gfp)
13628 {
13629         nl80211_send_mlme_event(rdev, netdev, buf, len,
13630                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
13631 }
13632
13633 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
13634                            struct net_device *netdev, const u8 *buf,
13635                            size_t len, gfp_t gfp, int uapsd_queues)
13636 {
13637         nl80211_send_mlme_event(rdev, netdev, buf, len,
13638                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
13639 }
13640
13641 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
13642                          struct net_device *netdev, const u8 *buf,
13643                          size_t len, gfp_t gfp)
13644 {
13645         nl80211_send_mlme_event(rdev, netdev, buf, len,
13646                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
13647 }
13648
13649 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
13650                            struct net_device *netdev, const u8 *buf,
13651                            size_t len, gfp_t gfp)
13652 {
13653         nl80211_send_mlme_event(rdev, netdev, buf, len,
13654                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
13655 }
13656
13657 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
13658                                   size_t len)
13659 {
13660         struct wireless_dev *wdev = dev->ieee80211_ptr;
13661         struct wiphy *wiphy = wdev->wiphy;
13662         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13663         const struct ieee80211_mgmt *mgmt = (void *)buf;
13664         u32 cmd;
13665
13666         if (WARN_ON(len < 2))
13667                 return;
13668
13669         if (ieee80211_is_deauth(mgmt->frame_control))
13670                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
13671         else
13672                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
13673
13674         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
13675         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
13676 }
13677 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
13678
13679 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
13680                                       struct net_device *netdev, int cmd,
13681                                       const u8 *addr, gfp_t gfp)
13682 {
13683         struct sk_buff *msg;
13684         void *hdr;
13685
13686         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13687         if (!msg)
13688                 return;
13689
13690         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13691         if (!hdr) {
13692                 nlmsg_free(msg);
13693                 return;
13694         }
13695
13696         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13697             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13698             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
13699             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
13700                 goto nla_put_failure;
13701
13702         genlmsg_end(msg, hdr);
13703
13704         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13705                                 NL80211_MCGRP_MLME, gfp);
13706         return;
13707
13708  nla_put_failure:
13709         genlmsg_cancel(msg, hdr);
13710         nlmsg_free(msg);
13711 }
13712
13713 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
13714                                struct net_device *netdev, const u8 *addr,
13715                                gfp_t gfp)
13716 {
13717         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
13718                                   addr, gfp);
13719 }
13720
13721 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
13722                                 struct net_device *netdev, const u8 *addr,
13723                                 gfp_t gfp)
13724 {
13725         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
13726                                   addr, gfp);
13727 }
13728
13729 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
13730                                  struct net_device *netdev,
13731                                  struct cfg80211_connect_resp_params *cr,
13732                                  gfp_t gfp)
13733 {
13734         struct sk_buff *msg;
13735         void *hdr;
13736
13737         msg = nlmsg_new(100 + cr->req_ie_len + cr->resp_ie_len +
13738                         cr->fils_kek_len + cr->pmk_len +
13739                         (cr->pmkid ? WLAN_PMKID_LEN : 0), gfp);
13740         if (!msg)
13741                 return;
13742
13743         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
13744         if (!hdr) {
13745                 nlmsg_free(msg);
13746                 return;
13747         }
13748
13749         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13750             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13751             (cr->bssid &&
13752              nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, cr->bssid)) ||
13753             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
13754                         cr->status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
13755                         cr->status) ||
13756             (cr->status < 0 &&
13757              (nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
13758               nla_put_u32(msg, NL80211_ATTR_TIMEOUT_REASON,
13759                           cr->timeout_reason))) ||
13760             (cr->req_ie &&
13761              nla_put(msg, NL80211_ATTR_REQ_IE, cr->req_ie_len, cr->req_ie)) ||
13762             (cr->resp_ie &&
13763              nla_put(msg, NL80211_ATTR_RESP_IE, cr->resp_ie_len,
13764                      cr->resp_ie)) ||
13765             (cr->update_erp_next_seq_num &&
13766              nla_put_u16(msg, NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM,
13767                          cr->fils_erp_next_seq_num)) ||
13768             (cr->status == WLAN_STATUS_SUCCESS &&
13769              ((cr->fils_kek &&
13770                nla_put(msg, NL80211_ATTR_FILS_KEK, cr->fils_kek_len,
13771                        cr->fils_kek)) ||
13772               (cr->pmk &&
13773                nla_put(msg, NL80211_ATTR_PMK, cr->pmk_len, cr->pmk)) ||
13774               (cr->pmkid &&
13775                nla_put(msg, NL80211_ATTR_PMKID, WLAN_PMKID_LEN, cr->pmkid)))))
13776                 goto nla_put_failure;
13777
13778         genlmsg_end(msg, hdr);
13779
13780         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13781                                 NL80211_MCGRP_MLME, gfp);
13782         return;
13783
13784  nla_put_failure:
13785         genlmsg_cancel(msg, hdr);
13786         nlmsg_free(msg);
13787 }
13788
13789 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
13790                          struct net_device *netdev,
13791                          struct cfg80211_roam_info *info, gfp_t gfp)
13792 {
13793         struct sk_buff *msg;
13794         void *hdr;
13795         const u8 *bssid = info->bss ? info->bss->bssid : info->bssid;
13796
13797         msg = nlmsg_new(100 + info->req_ie_len + info->resp_ie_len, gfp);
13798         if (!msg)
13799                 return;
13800
13801         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
13802         if (!hdr) {
13803                 nlmsg_free(msg);
13804                 return;
13805         }
13806
13807         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13808             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13809             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
13810             (info->req_ie &&
13811              nla_put(msg, NL80211_ATTR_REQ_IE, info->req_ie_len,
13812                      info->req_ie)) ||
13813             (info->resp_ie &&
13814              nla_put(msg, NL80211_ATTR_RESP_IE, info->resp_ie_len,
13815                      info->resp_ie)) ||
13816             (info->authorized &&
13817              nla_put_flag(msg, NL80211_ATTR_PORT_AUTHORIZED)))
13818                 goto nla_put_failure;
13819
13820         genlmsg_end(msg, hdr);
13821
13822         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13823                                 NL80211_MCGRP_MLME, gfp);
13824         return;
13825
13826  nla_put_failure:
13827         genlmsg_cancel(msg, hdr);
13828         nlmsg_free(msg);
13829 }
13830
13831 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
13832                                struct net_device *netdev, u16 reason,
13833                                const u8 *ie, size_t ie_len, bool from_ap)
13834 {
13835         struct sk_buff *msg;
13836         void *hdr;
13837
13838         msg = nlmsg_new(100 + ie_len, GFP_KERNEL);
13839         if (!msg)
13840                 return;
13841
13842         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
13843         if (!hdr) {
13844                 nlmsg_free(msg);
13845                 return;
13846         }
13847
13848         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13849             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13850             (from_ap && reason &&
13851              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
13852             (from_ap &&
13853              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
13854             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
13855                 goto nla_put_failure;
13856
13857         genlmsg_end(msg, hdr);
13858
13859         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13860                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13861         return;
13862
13863  nla_put_failure:
13864         genlmsg_cancel(msg, hdr);
13865         nlmsg_free(msg);
13866 }
13867
13868 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
13869                              struct net_device *netdev, const u8 *bssid,
13870                              gfp_t gfp)
13871 {
13872         struct sk_buff *msg;
13873         void *hdr;
13874
13875         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13876         if (!msg)
13877                 return;
13878
13879         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
13880         if (!hdr) {
13881                 nlmsg_free(msg);
13882                 return;
13883         }
13884
13885         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13886             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13887             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13888                 goto nla_put_failure;
13889
13890         genlmsg_end(msg, hdr);
13891
13892         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13893                                 NL80211_MCGRP_MLME, gfp);
13894         return;
13895
13896  nla_put_failure:
13897         genlmsg_cancel(msg, hdr);
13898         nlmsg_free(msg);
13899 }
13900
13901 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
13902                                         const u8* ie, u8 ie_len, gfp_t gfp)
13903 {
13904         struct wireless_dev *wdev = dev->ieee80211_ptr;
13905         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13906         struct sk_buff *msg;
13907         void *hdr;
13908
13909         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
13910                 return;
13911
13912         trace_cfg80211_notify_new_peer_candidate(dev, addr);
13913
13914         msg = nlmsg_new(100 + ie_len, gfp);
13915         if (!msg)
13916                 return;
13917
13918         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
13919         if (!hdr) {
13920                 nlmsg_free(msg);
13921                 return;
13922         }
13923
13924         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13925             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13926             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13927             (ie_len && ie &&
13928              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
13929                 goto nla_put_failure;
13930
13931         genlmsg_end(msg, hdr);
13932
13933         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13934                                 NL80211_MCGRP_MLME, gfp);
13935         return;
13936
13937  nla_put_failure:
13938         genlmsg_cancel(msg, hdr);
13939         nlmsg_free(msg);
13940 }
13941 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
13942
13943 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
13944                                  struct net_device *netdev, const u8 *addr,
13945                                  enum nl80211_key_type key_type, int key_id,
13946                                  const u8 *tsc, gfp_t gfp)
13947 {
13948         struct sk_buff *msg;
13949         void *hdr;
13950
13951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13952         if (!msg)
13953                 return;
13954
13955         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
13956         if (!hdr) {
13957                 nlmsg_free(msg);
13958                 return;
13959         }
13960
13961         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13962             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13963             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
13964             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
13965             (key_id != -1 &&
13966              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
13967             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
13968                 goto nla_put_failure;
13969
13970         genlmsg_end(msg, hdr);
13971
13972         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13973                                 NL80211_MCGRP_MLME, gfp);
13974         return;
13975
13976  nla_put_failure:
13977         genlmsg_cancel(msg, hdr);
13978         nlmsg_free(msg);
13979 }
13980
13981 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
13982                                     struct ieee80211_channel *channel_before,
13983                                     struct ieee80211_channel *channel_after)
13984 {
13985         struct sk_buff *msg;
13986         void *hdr;
13987         struct nlattr *nl_freq;
13988
13989         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
13990         if (!msg)
13991                 return;
13992
13993         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
13994         if (!hdr) {
13995                 nlmsg_free(msg);
13996                 return;
13997         }
13998
13999         /*
14000          * Since we are applying the beacon hint to a wiphy we know its
14001          * wiphy_idx is valid
14002          */
14003         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
14004                 goto nla_put_failure;
14005
14006         /* Before */
14007         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
14008         if (!nl_freq)
14009                 goto nla_put_failure;
14010         if (nl80211_msg_put_channel(msg, channel_before, false))
14011                 goto nla_put_failure;
14012         nla_nest_end(msg, nl_freq);
14013
14014         /* After */
14015         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
14016         if (!nl_freq)
14017                 goto nla_put_failure;
14018         if (nl80211_msg_put_channel(msg, channel_after, false))
14019                 goto nla_put_failure;
14020         nla_nest_end(msg, nl_freq);
14021
14022         genlmsg_end(msg, hdr);
14023
14024         rcu_read_lock();
14025         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
14026                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
14027         rcu_read_unlock();
14028
14029         return;
14030
14031 nla_put_failure:
14032         genlmsg_cancel(msg, hdr);
14033         nlmsg_free(msg);
14034 }
14035
14036 static void nl80211_send_remain_on_chan_event(
14037         int cmd, struct cfg80211_registered_device *rdev,
14038         struct wireless_dev *wdev, u64 cookie,
14039         struct ieee80211_channel *chan,
14040         unsigned int duration, gfp_t gfp)
14041 {
14042         struct sk_buff *msg;
14043         void *hdr;
14044
14045         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14046         if (!msg)
14047                 return;
14048
14049         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
14050         if (!hdr) {
14051                 nlmsg_free(msg);
14052                 return;
14053         }
14054
14055         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14056             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14057                                          wdev->netdev->ifindex)) ||
14058             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14059                               NL80211_ATTR_PAD) ||
14060             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
14061             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
14062                         NL80211_CHAN_NO_HT) ||
14063             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14064                               NL80211_ATTR_PAD))
14065                 goto nla_put_failure;
14066
14067         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
14068             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
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         genlmsg_cancel(msg, hdr);
14079         nlmsg_free(msg);
14080 }
14081
14082 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
14083                                struct ieee80211_channel *chan,
14084                                unsigned int duration, gfp_t gfp)
14085 {
14086         struct wiphy *wiphy = wdev->wiphy;
14087         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14088
14089         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
14090         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
14091                                           rdev, wdev, cookie, chan,
14092                                           duration, gfp);
14093 }
14094 EXPORT_SYMBOL(cfg80211_ready_on_channel);
14095
14096 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
14097                                         struct ieee80211_channel *chan,
14098                                         gfp_t gfp)
14099 {
14100         struct wiphy *wiphy = wdev->wiphy;
14101         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14102
14103         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
14104         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
14105                                           rdev, wdev, cookie, chan, 0, gfp);
14106 }
14107 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
14108
14109 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
14110                       struct station_info *sinfo, gfp_t gfp)
14111 {
14112         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
14113         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14114         struct sk_buff *msg;
14115
14116         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
14117
14118         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14119         if (!msg)
14120                 return;
14121
14122         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
14123                                  rdev, dev, mac_addr, sinfo) < 0) {
14124                 nlmsg_free(msg);
14125                 return;
14126         }
14127
14128         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14129                                 NL80211_MCGRP_MLME, gfp);
14130 }
14131 EXPORT_SYMBOL(cfg80211_new_sta);
14132
14133 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
14134                             struct station_info *sinfo, gfp_t gfp)
14135 {
14136         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
14137         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14138         struct sk_buff *msg;
14139         struct station_info empty_sinfo = {};
14140
14141         if (!sinfo)
14142                 sinfo = &empty_sinfo;
14143
14144         trace_cfg80211_del_sta(dev, mac_addr);
14145
14146         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14147         if (!msg)
14148                 return;
14149
14150         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
14151                                  rdev, dev, mac_addr, sinfo) < 0) {
14152                 nlmsg_free(msg);
14153                 return;
14154         }
14155
14156         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14157                                 NL80211_MCGRP_MLME, gfp);
14158 }
14159 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
14160
14161 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
14162                           enum nl80211_connect_failed_reason reason,
14163                           gfp_t gfp)
14164 {
14165         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
14166         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14167         struct sk_buff *msg;
14168         void *hdr;
14169
14170         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
14171         if (!msg)
14172                 return;
14173
14174         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
14175         if (!hdr) {
14176                 nlmsg_free(msg);
14177                 return;
14178         }
14179
14180         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14181             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
14182             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
14183                 goto nla_put_failure;
14184
14185         genlmsg_end(msg, hdr);
14186
14187         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14188                                 NL80211_MCGRP_MLME, gfp);
14189         return;
14190
14191  nla_put_failure:
14192         genlmsg_cancel(msg, hdr);
14193         nlmsg_free(msg);
14194 }
14195 EXPORT_SYMBOL(cfg80211_conn_failed);
14196
14197 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
14198                                        const u8 *addr, gfp_t gfp)
14199 {
14200         struct wireless_dev *wdev = dev->ieee80211_ptr;
14201         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14202         struct sk_buff *msg;
14203         void *hdr;
14204         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
14205
14206         if (!nlportid)
14207                 return false;
14208
14209         msg = nlmsg_new(100, gfp);
14210         if (!msg)
14211                 return true;
14212
14213         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
14214         if (!hdr) {
14215                 nlmsg_free(msg);
14216                 return true;
14217         }
14218
14219         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14220             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14221             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
14222                 goto nla_put_failure;
14223
14224         genlmsg_end(msg, hdr);
14225         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14226         return true;
14227
14228  nla_put_failure:
14229         genlmsg_cancel(msg, hdr);
14230         nlmsg_free(msg);
14231         return true;
14232 }
14233
14234 bool cfg80211_rx_spurious_frame(struct net_device *dev,
14235                                 const u8 *addr, gfp_t gfp)
14236 {
14237         struct wireless_dev *wdev = dev->ieee80211_ptr;
14238         bool ret;
14239
14240         trace_cfg80211_rx_spurious_frame(dev, addr);
14241
14242         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
14243                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
14244                 trace_cfg80211_return_bool(false);
14245                 return false;
14246         }
14247         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
14248                                          addr, gfp);
14249         trace_cfg80211_return_bool(ret);
14250         return ret;
14251 }
14252 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
14253
14254 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
14255                                         const u8 *addr, gfp_t gfp)
14256 {
14257         struct wireless_dev *wdev = dev->ieee80211_ptr;
14258         bool ret;
14259
14260         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
14261
14262         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
14263                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
14264                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
14265                 trace_cfg80211_return_bool(false);
14266                 return false;
14267         }
14268         ret = __nl80211_unexpected_frame(dev,
14269                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
14270                                          addr, gfp);
14271         trace_cfg80211_return_bool(ret);
14272         return ret;
14273 }
14274 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
14275
14276 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
14277                       struct wireless_dev *wdev, u32 nlportid,
14278                       int freq, int sig_dbm,
14279                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
14280 {
14281         struct net_device *netdev = wdev->netdev;
14282         struct sk_buff *msg;
14283         void *hdr;
14284
14285         msg = nlmsg_new(100 + len, gfp);
14286         if (!msg)
14287                 return -ENOMEM;
14288
14289         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
14290         if (!hdr) {
14291                 nlmsg_free(msg);
14292                 return -ENOMEM;
14293         }
14294
14295         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14296             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14297                                         netdev->ifindex)) ||
14298             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14299                               NL80211_ATTR_PAD) ||
14300             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
14301             (sig_dbm &&
14302              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
14303             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
14304             (flags &&
14305              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
14306                 goto nla_put_failure;
14307
14308         genlmsg_end(msg, hdr);
14309
14310         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14311
14312  nla_put_failure:
14313         genlmsg_cancel(msg, hdr);
14314         nlmsg_free(msg);
14315         return -ENOBUFS;
14316 }
14317
14318 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
14319                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
14320 {
14321         struct wiphy *wiphy = wdev->wiphy;
14322         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14323         struct net_device *netdev = wdev->netdev;
14324         struct sk_buff *msg;
14325         void *hdr;
14326
14327         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
14328
14329         msg = nlmsg_new(100 + len, gfp);
14330         if (!msg)
14331                 return;
14332
14333         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
14334         if (!hdr) {
14335                 nlmsg_free(msg);
14336                 return;
14337         }
14338
14339         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14340             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14341                                    netdev->ifindex)) ||
14342             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14343                               NL80211_ATTR_PAD) ||
14344             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
14345             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14346                               NL80211_ATTR_PAD) ||
14347             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
14348                 goto nla_put_failure;
14349
14350         genlmsg_end(msg, hdr);
14351
14352         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14353                                 NL80211_MCGRP_MLME, gfp);
14354         return;
14355
14356  nla_put_failure:
14357         genlmsg_cancel(msg, hdr);
14358         nlmsg_free(msg);
14359 }
14360 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
14361
14362 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
14363                                             const char *mac, gfp_t gfp)
14364 {
14365         struct wireless_dev *wdev = dev->ieee80211_ptr;
14366         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14367         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14368         void **cb;
14369
14370         if (!msg)
14371                 return NULL;
14372
14373         cb = (void **)msg->cb;
14374
14375         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
14376         if (!cb[0]) {
14377                 nlmsg_free(msg);
14378                 return NULL;
14379         }
14380
14381         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14382             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
14383                 goto nla_put_failure;
14384
14385         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
14386                 goto nla_put_failure;
14387
14388         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
14389         if (!cb[1])
14390                 goto nla_put_failure;
14391
14392         cb[2] = rdev;
14393
14394         return msg;
14395  nla_put_failure:
14396         nlmsg_free(msg);
14397         return NULL;
14398 }
14399
14400 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
14401 {
14402         void **cb = (void **)msg->cb;
14403         struct cfg80211_registered_device *rdev = cb[2];
14404
14405         nla_nest_end(msg, cb[1]);
14406         genlmsg_end(msg, cb[0]);
14407
14408         memset(msg->cb, 0, sizeof(msg->cb));
14409
14410         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14411                                 NL80211_MCGRP_MLME, gfp);
14412 }
14413
14414 void cfg80211_cqm_rssi_notify(struct net_device *dev,
14415                               enum nl80211_cqm_rssi_threshold_event rssi_event,
14416                               s32 rssi_level, gfp_t gfp)
14417 {
14418         struct sk_buff *msg;
14419         struct wireless_dev *wdev = dev->ieee80211_ptr;
14420         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14421
14422         trace_cfg80211_cqm_rssi_notify(dev, rssi_event, rssi_level);
14423
14424         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
14425                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
14426                 return;
14427
14428         if (wdev->cqm_config) {
14429                 wdev->cqm_config->last_rssi_event_value = rssi_level;
14430
14431                 cfg80211_cqm_rssi_update(rdev, dev);
14432
14433                 if (rssi_level == 0)
14434                         rssi_level = wdev->cqm_config->last_rssi_event_value;
14435         }
14436
14437         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
14438         if (!msg)
14439                 return;
14440
14441         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
14442                         rssi_event))
14443                 goto nla_put_failure;
14444
14445         if (rssi_level && nla_put_s32(msg, NL80211_ATTR_CQM_RSSI_LEVEL,
14446                                       rssi_level))
14447                 goto nla_put_failure;
14448
14449         cfg80211_send_cqm(msg, gfp);
14450
14451         return;
14452
14453  nla_put_failure:
14454         nlmsg_free(msg);
14455 }
14456 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
14457
14458 void cfg80211_cqm_txe_notify(struct net_device *dev,
14459                              const u8 *peer, u32 num_packets,
14460                              u32 rate, u32 intvl, gfp_t gfp)
14461 {
14462         struct sk_buff *msg;
14463
14464         msg = cfg80211_prepare_cqm(dev, peer, gfp);
14465         if (!msg)
14466                 return;
14467
14468         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
14469                 goto nla_put_failure;
14470
14471         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
14472                 goto nla_put_failure;
14473
14474         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
14475                 goto nla_put_failure;
14476
14477         cfg80211_send_cqm(msg, gfp);
14478         return;
14479
14480  nla_put_failure:
14481         nlmsg_free(msg);
14482 }
14483 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
14484
14485 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
14486                                  const u8 *peer, u32 num_packets, gfp_t gfp)
14487 {
14488         struct sk_buff *msg;
14489
14490         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
14491
14492         msg = cfg80211_prepare_cqm(dev, peer, gfp);
14493         if (!msg)
14494                 return;
14495
14496         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
14497                 goto nla_put_failure;
14498
14499         cfg80211_send_cqm(msg, gfp);
14500         return;
14501
14502  nla_put_failure:
14503         nlmsg_free(msg);
14504 }
14505 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
14506
14507 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
14508 {
14509         struct sk_buff *msg;
14510
14511         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
14512         if (!msg)
14513                 return;
14514
14515         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
14516                 goto nla_put_failure;
14517
14518         cfg80211_send_cqm(msg, gfp);
14519         return;
14520
14521  nla_put_failure:
14522         nlmsg_free(msg);
14523 }
14524 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
14525
14526 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
14527                                      struct net_device *netdev, const u8 *bssid,
14528                                      const u8 *replay_ctr, gfp_t gfp)
14529 {
14530         struct sk_buff *msg;
14531         struct nlattr *rekey_attr;
14532         void *hdr;
14533
14534         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14535         if (!msg)
14536                 return;
14537
14538         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
14539         if (!hdr) {
14540                 nlmsg_free(msg);
14541                 return;
14542         }
14543
14544         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14545             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14546             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
14547                 goto nla_put_failure;
14548
14549         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
14550         if (!rekey_attr)
14551                 goto nla_put_failure;
14552
14553         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
14554                     NL80211_REPLAY_CTR_LEN, replay_ctr))
14555                 goto nla_put_failure;
14556
14557         nla_nest_end(msg, rekey_attr);
14558
14559         genlmsg_end(msg, hdr);
14560
14561         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14562                                 NL80211_MCGRP_MLME, gfp);
14563         return;
14564
14565  nla_put_failure:
14566         genlmsg_cancel(msg, hdr);
14567         nlmsg_free(msg);
14568 }
14569
14570 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
14571                                const u8 *replay_ctr, gfp_t gfp)
14572 {
14573         struct wireless_dev *wdev = dev->ieee80211_ptr;
14574         struct wiphy *wiphy = wdev->wiphy;
14575         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14576
14577         trace_cfg80211_gtk_rekey_notify(dev, bssid);
14578         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
14579 }
14580 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
14581
14582 static void
14583 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
14584                                struct net_device *netdev, int index,
14585                                const u8 *bssid, bool preauth, gfp_t gfp)
14586 {
14587         struct sk_buff *msg;
14588         struct nlattr *attr;
14589         void *hdr;
14590
14591         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14592         if (!msg)
14593                 return;
14594
14595         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
14596         if (!hdr) {
14597                 nlmsg_free(msg);
14598                 return;
14599         }
14600
14601         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14602             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
14603                 goto nla_put_failure;
14604
14605         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
14606         if (!attr)
14607                 goto nla_put_failure;
14608
14609         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
14610             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
14611             (preauth &&
14612              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
14613                 goto nla_put_failure;
14614
14615         nla_nest_end(msg, attr);
14616
14617         genlmsg_end(msg, hdr);
14618
14619         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14620                                 NL80211_MCGRP_MLME, gfp);
14621         return;
14622
14623  nla_put_failure:
14624         genlmsg_cancel(msg, hdr);
14625         nlmsg_free(msg);
14626 }
14627
14628 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
14629                                      const u8 *bssid, bool preauth, gfp_t gfp)
14630 {
14631         struct wireless_dev *wdev = dev->ieee80211_ptr;
14632         struct wiphy *wiphy = wdev->wiphy;
14633         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14634
14635         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
14636         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
14637 }
14638 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
14639
14640 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
14641                                      struct net_device *netdev,
14642                                      struct cfg80211_chan_def *chandef,
14643                                      gfp_t gfp,
14644                                      enum nl80211_commands notif,
14645                                      u8 count)
14646 {
14647         struct sk_buff *msg;
14648         void *hdr;
14649
14650         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14651         if (!msg)
14652                 return;
14653
14654         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
14655         if (!hdr) {
14656                 nlmsg_free(msg);
14657                 return;
14658         }
14659
14660         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
14661                 goto nla_put_failure;
14662
14663         if (nl80211_send_chandef(msg, chandef))
14664                 goto nla_put_failure;
14665
14666         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
14667             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
14668                         goto nla_put_failure;
14669
14670         genlmsg_end(msg, hdr);
14671
14672         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14673                                 NL80211_MCGRP_MLME, gfp);
14674         return;
14675
14676  nla_put_failure:
14677         genlmsg_cancel(msg, hdr);
14678         nlmsg_free(msg);
14679 }
14680
14681 void cfg80211_ch_switch_notify(struct net_device *dev,
14682                                struct cfg80211_chan_def *chandef)
14683 {
14684         struct wireless_dev *wdev = dev->ieee80211_ptr;
14685         struct wiphy *wiphy = wdev->wiphy;
14686         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14687
14688         ASSERT_WDEV_LOCK(wdev);
14689
14690         trace_cfg80211_ch_switch_notify(dev, chandef);
14691
14692         wdev->chandef = *chandef;
14693         wdev->preset_chandef = *chandef;
14694         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
14695                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
14696 }
14697 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
14698
14699 void cfg80211_ch_switch_started_notify(struct net_device *dev,
14700                                        struct cfg80211_chan_def *chandef,
14701                                        u8 count)
14702 {
14703         struct wireless_dev *wdev = dev->ieee80211_ptr;
14704         struct wiphy *wiphy = wdev->wiphy;
14705         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14706
14707         trace_cfg80211_ch_switch_started_notify(dev, chandef);
14708
14709         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
14710                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
14711 }
14712 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
14713
14714 void
14715 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
14716                      const struct cfg80211_chan_def *chandef,
14717                      enum nl80211_radar_event event,
14718                      struct net_device *netdev, gfp_t gfp)
14719 {
14720         struct sk_buff *msg;
14721         void *hdr;
14722
14723         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14724         if (!msg)
14725                 return;
14726
14727         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
14728         if (!hdr) {
14729                 nlmsg_free(msg);
14730                 return;
14731         }
14732
14733         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
14734                 goto nla_put_failure;
14735
14736         /* NOP and radar events don't need a netdev parameter */
14737         if (netdev) {
14738                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
14739
14740                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14741                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14742                                       NL80211_ATTR_PAD))
14743                         goto nla_put_failure;
14744         }
14745
14746         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
14747                 goto nla_put_failure;
14748
14749         if (nl80211_send_chandef(msg, chandef))
14750                 goto nla_put_failure;
14751
14752         genlmsg_end(msg, hdr);
14753
14754         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14755                                 NL80211_MCGRP_MLME, gfp);
14756         return;
14757
14758  nla_put_failure:
14759         genlmsg_cancel(msg, hdr);
14760         nlmsg_free(msg);
14761 }
14762
14763 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
14764                            u64 cookie, bool acked, gfp_t gfp)
14765 {
14766         struct wireless_dev *wdev = dev->ieee80211_ptr;
14767         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14768         struct sk_buff *msg;
14769         void *hdr;
14770
14771         trace_cfg80211_probe_status(dev, addr, cookie, acked);
14772
14773         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14774
14775         if (!msg)
14776                 return;
14777
14778         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
14779         if (!hdr) {
14780                 nlmsg_free(msg);
14781                 return;
14782         }
14783
14784         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14785             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14786             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
14787             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14788                               NL80211_ATTR_PAD) ||
14789             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
14790                 goto nla_put_failure;
14791
14792         genlmsg_end(msg, hdr);
14793
14794         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14795                                 NL80211_MCGRP_MLME, gfp);
14796         return;
14797
14798  nla_put_failure:
14799         genlmsg_cancel(msg, hdr);
14800         nlmsg_free(msg);
14801 }
14802 EXPORT_SYMBOL(cfg80211_probe_status);
14803
14804 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
14805                                  const u8 *frame, size_t len,
14806                                  int freq, int sig_dbm)
14807 {
14808         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14809         struct sk_buff *msg;
14810         void *hdr;
14811         struct cfg80211_beacon_registration *reg;
14812
14813         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
14814
14815         spin_lock_bh(&rdev->beacon_registrations_lock);
14816         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
14817                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
14818                 if (!msg) {
14819                         spin_unlock_bh(&rdev->beacon_registrations_lock);
14820                         return;
14821                 }
14822
14823                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
14824                 if (!hdr)
14825                         goto nla_put_failure;
14826
14827                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14828                     (freq &&
14829                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
14830                     (sig_dbm &&
14831                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
14832                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
14833                         goto nla_put_failure;
14834
14835                 genlmsg_end(msg, hdr);
14836
14837                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
14838         }
14839         spin_unlock_bh(&rdev->beacon_registrations_lock);
14840         return;
14841
14842  nla_put_failure:
14843         spin_unlock_bh(&rdev->beacon_registrations_lock);
14844         if (hdr)
14845                 genlmsg_cancel(msg, hdr);
14846         nlmsg_free(msg);
14847 }
14848 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
14849
14850 #ifdef CONFIG_PM
14851 static int cfg80211_net_detect_results(struct sk_buff *msg,
14852                                        struct cfg80211_wowlan_wakeup *wakeup)
14853 {
14854         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
14855         struct nlattr *nl_results, *nl_match, *nl_freqs;
14856         int i, j;
14857
14858         nl_results = nla_nest_start(
14859                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
14860         if (!nl_results)
14861                 return -EMSGSIZE;
14862
14863         for (i = 0; i < nd->n_matches; i++) {
14864                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
14865
14866                 nl_match = nla_nest_start(msg, i);
14867                 if (!nl_match)
14868                         break;
14869
14870                 /* The SSID attribute is optional in nl80211, but for
14871                  * simplicity reasons it's always present in the
14872                  * cfg80211 structure.  If a driver can't pass the
14873                  * SSID, that needs to be changed.  A zero length SSID
14874                  * is still a valid SSID (wildcard), so it cannot be
14875                  * used for this purpose.
14876                  */
14877                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
14878                             match->ssid.ssid)) {
14879                         nla_nest_cancel(msg, nl_match);
14880                         goto out;
14881                 }
14882
14883                 if (match->n_channels) {
14884                         nl_freqs = nla_nest_start(
14885                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
14886                         if (!nl_freqs) {
14887                                 nla_nest_cancel(msg, nl_match);
14888                                 goto out;
14889                         }
14890
14891                         for (j = 0; j < match->n_channels; j++) {
14892                                 if (nla_put_u32(msg, j, match->channels[j])) {
14893                                         nla_nest_cancel(msg, nl_freqs);
14894                                         nla_nest_cancel(msg, nl_match);
14895                                         goto out;
14896                                 }
14897                         }
14898
14899                         nla_nest_end(msg, nl_freqs);
14900                 }
14901
14902                 nla_nest_end(msg, nl_match);
14903         }
14904
14905 out:
14906         nla_nest_end(msg, nl_results);
14907         return 0;
14908 }
14909
14910 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
14911                                    struct cfg80211_wowlan_wakeup *wakeup,
14912                                    gfp_t gfp)
14913 {
14914         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14915         struct sk_buff *msg;
14916         void *hdr;
14917         int size = 200;
14918
14919         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
14920
14921         if (wakeup)
14922                 size += wakeup->packet_present_len;
14923
14924         msg = nlmsg_new(size, gfp);
14925         if (!msg)
14926                 return;
14927
14928         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
14929         if (!hdr)
14930                 goto free_msg;
14931
14932         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14933             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14934                               NL80211_ATTR_PAD))
14935                 goto free_msg;
14936
14937         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14938                                         wdev->netdev->ifindex))
14939                 goto free_msg;
14940
14941         if (wakeup) {
14942                 struct nlattr *reasons;
14943
14944                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
14945                 if (!reasons)
14946                         goto free_msg;
14947
14948                 if (wakeup->disconnect &&
14949                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
14950                         goto free_msg;
14951                 if (wakeup->magic_pkt &&
14952                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
14953                         goto free_msg;
14954                 if (wakeup->gtk_rekey_failure &&
14955                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
14956                         goto free_msg;
14957                 if (wakeup->eap_identity_req &&
14958                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
14959                         goto free_msg;
14960                 if (wakeup->four_way_handshake &&
14961                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
14962                         goto free_msg;
14963                 if (wakeup->rfkill_release &&
14964                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
14965                         goto free_msg;
14966
14967                 if (wakeup->pattern_idx >= 0 &&
14968                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
14969                                 wakeup->pattern_idx))
14970                         goto free_msg;
14971
14972                 if (wakeup->tcp_match &&
14973                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
14974                         goto free_msg;
14975
14976                 if (wakeup->tcp_connlost &&
14977                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
14978                         goto free_msg;
14979
14980                 if (wakeup->tcp_nomoretokens &&
14981                     nla_put_flag(msg,
14982                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
14983                         goto free_msg;
14984
14985                 if (wakeup->packet) {
14986                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
14987                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
14988
14989                         if (!wakeup->packet_80211) {
14990                                 pkt_attr =
14991                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
14992                                 len_attr =
14993                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
14994                         }
14995
14996                         if (wakeup->packet_len &&
14997                             nla_put_u32(msg, len_attr, wakeup->packet_len))
14998                                 goto free_msg;
14999
15000                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
15001                                     wakeup->packet))
15002                                 goto free_msg;
15003                 }
15004
15005                 if (wakeup->net_detect &&
15006                     cfg80211_net_detect_results(msg, wakeup))
15007                                 goto free_msg;
15008
15009                 nla_nest_end(msg, reasons);
15010         }
15011
15012         genlmsg_end(msg, hdr);
15013
15014         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15015                                 NL80211_MCGRP_MLME, gfp);
15016         return;
15017
15018  free_msg:
15019         nlmsg_free(msg);
15020 }
15021 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
15022 #endif
15023
15024 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
15025                                 enum nl80211_tdls_operation oper,
15026                                 u16 reason_code, gfp_t gfp)
15027 {
15028         struct wireless_dev *wdev = dev->ieee80211_ptr;
15029         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
15030         struct sk_buff *msg;
15031         void *hdr;
15032
15033         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
15034                                          reason_code);
15035
15036         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15037         if (!msg)
15038                 return;
15039
15040         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
15041         if (!hdr) {
15042                 nlmsg_free(msg);
15043                 return;
15044         }
15045
15046         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15047             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
15048             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
15049             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
15050             (reason_code > 0 &&
15051              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
15052                 goto nla_put_failure;
15053
15054         genlmsg_end(msg, hdr);
15055
15056         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15057                                 NL80211_MCGRP_MLME, gfp);
15058         return;
15059
15060  nla_put_failure:
15061         genlmsg_cancel(msg, hdr);
15062         nlmsg_free(msg);
15063 }
15064 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
15065
15066 static int nl80211_netlink_notify(struct notifier_block * nb,
15067                                   unsigned long state,
15068                                   void *_notify)
15069 {
15070         struct netlink_notify *notify = _notify;
15071         struct cfg80211_registered_device *rdev;
15072         struct wireless_dev *wdev;
15073         struct cfg80211_beacon_registration *reg, *tmp;
15074
15075         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
15076                 return NOTIFY_DONE;
15077
15078         rcu_read_lock();
15079
15080         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
15081                 struct cfg80211_sched_scan_request *sched_scan_req;
15082
15083                 list_for_each_entry_rcu(sched_scan_req,
15084                                         &rdev->sched_scan_req_list,
15085                                         list) {
15086                         if (sched_scan_req->owner_nlportid == notify->portid) {
15087                                 sched_scan_req->nl_owner_dead = true;
15088                                 schedule_work(&rdev->sched_scan_stop_wk);
15089                         }
15090                 }
15091
15092                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
15093                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
15094
15095                         if (wdev->owner_nlportid == notify->portid) {
15096                                 wdev->nl_owner_dead = true;
15097                                 schedule_work(&rdev->destroy_work);
15098                         } else if (wdev->conn_owner_nlportid == notify->portid) {
15099                                 schedule_work(&wdev->disconnect_wk);
15100                         }
15101                 }
15102
15103                 spin_lock_bh(&rdev->beacon_registrations_lock);
15104                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
15105                                          list) {
15106                         if (reg->nlportid == notify->portid) {
15107                                 list_del(&reg->list);
15108                                 kfree(reg);
15109                                 break;
15110                         }
15111                 }
15112                 spin_unlock_bh(&rdev->beacon_registrations_lock);
15113         }
15114
15115         rcu_read_unlock();
15116
15117         /*
15118          * It is possible that the user space process that is controlling the
15119          * indoor setting disappeared, so notify the regulatory core.
15120          */
15121         regulatory_netlink_notify(notify->portid);
15122         return NOTIFY_OK;
15123 }
15124
15125 static struct notifier_block nl80211_netlink_notifier = {
15126         .notifier_call = nl80211_netlink_notify,
15127 };
15128
15129 void cfg80211_ft_event(struct net_device *netdev,
15130                        struct cfg80211_ft_event_params *ft_event)
15131 {
15132         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
15133         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15134         struct sk_buff *msg;
15135         void *hdr;
15136
15137         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
15138
15139         if (!ft_event->target_ap)
15140                 return;
15141
15142         msg = nlmsg_new(100 + ft_event->ric_ies_len, GFP_KERNEL);
15143         if (!msg)
15144                 return;
15145
15146         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
15147         if (!hdr)
15148                 goto out;
15149
15150         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15151             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
15152             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
15153                 goto out;
15154
15155         if (ft_event->ies &&
15156             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
15157                 goto out;
15158         if (ft_event->ric_ies &&
15159             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
15160                     ft_event->ric_ies))
15161                 goto out;
15162
15163         genlmsg_end(msg, hdr);
15164
15165         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15166                                 NL80211_MCGRP_MLME, GFP_KERNEL);
15167         return;
15168  out:
15169         nlmsg_free(msg);
15170 }
15171 EXPORT_SYMBOL(cfg80211_ft_event);
15172
15173 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
15174 {
15175         struct cfg80211_registered_device *rdev;
15176         struct sk_buff *msg;
15177         void *hdr;
15178         u32 nlportid;
15179
15180         rdev = wiphy_to_rdev(wdev->wiphy);
15181         if (!rdev->crit_proto_nlportid)
15182                 return;
15183
15184         nlportid = rdev->crit_proto_nlportid;
15185         rdev->crit_proto_nlportid = 0;
15186
15187         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15188         if (!msg)
15189                 return;
15190
15191         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
15192         if (!hdr)
15193                 goto nla_put_failure;
15194
15195         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15196             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15197                               NL80211_ATTR_PAD))
15198                 goto nla_put_failure;
15199
15200         genlmsg_end(msg, hdr);
15201
15202         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
15203         return;
15204
15205  nla_put_failure:
15206         if (hdr)
15207                 genlmsg_cancel(msg, hdr);
15208         nlmsg_free(msg);
15209 }
15210 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
15211
15212 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
15213 {
15214         struct wiphy *wiphy = wdev->wiphy;
15215         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15216         struct sk_buff *msg;
15217         void *hdr;
15218
15219         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
15220         if (!msg)
15221                 return;
15222
15223         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
15224         if (!hdr)
15225                 goto out;
15226
15227         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15228             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
15229             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15230                               NL80211_ATTR_PAD))
15231                 goto out;
15232
15233         genlmsg_end(msg, hdr);
15234
15235         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
15236                                 NL80211_MCGRP_MLME, GFP_KERNEL);
15237         return;
15238  out:
15239         nlmsg_free(msg);
15240 }
15241
15242 /* initialisation/exit functions */
15243
15244 int __init nl80211_init(void)
15245 {
15246         int err;
15247
15248         err = genl_register_family(&nl80211_fam);
15249         if (err)
15250                 return err;
15251
15252         err = netlink_register_notifier(&nl80211_netlink_notifier);
15253         if (err)
15254                 goto err_out;
15255
15256         return 0;
15257  err_out:
15258         genl_unregister_family(&nl80211_fam);
15259         return err;
15260 }
15261
15262 void nl80211_exit(void)
15263 {
15264         netlink_unregister_notifier(&nl80211_netlink_notifier);
15265         genl_unregister_family(&nl80211_fam);
15266 }