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  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  41         .name = "nl80211",      /* have users key off the name instead */
  42         .hdrsize = 0,           /* no private header */
  43         .version = 1,           /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         assert_cfg80211_lock();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 mutex_lock(&rdev->devlist_mtx);
  84                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  85                         if (have_ifidx && wdev->netdev &&
  86                             wdev->netdev->ifindex == ifidx) {
  87                                 result = wdev;
  88                                 break;
  89                         }
  90                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  91                                 result = wdev;
  92                                 break;
  93                         }
  94                 }
  95                 mutex_unlock(&rdev->devlist_mtx);
  96
  97                 if (result)
  98                         break;
  99         }
 100
 101         if (result)
 102                 return result;
 103         return ERR_PTR(-ENODEV);
 104 }
 105
 106 static struct cfg80211_registered_device *
 107 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 108 {
 109         struct cfg80211_registered_device *rdev = NULL, *tmp;
 110         struct net_device *netdev;
 111
 112         assert_cfg80211_lock();
 113
 114         if (!attrs[NL80211_ATTR_WIPHY] &&
 115             !attrs[NL80211_ATTR_IFINDEX] &&
 116             !attrs[NL80211_ATTR_WDEV])
 117                 return ERR_PTR(-EINVAL);
 118
 119         if (attrs[NL80211_ATTR_WIPHY])
 120                 rdev = cfg80211_rdev_by_wiphy_idx(
 121                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 122
 123         if (attrs[NL80211_ATTR_WDEV]) {
 124                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 125                 struct wireless_dev *wdev;
 126                 bool found = false;
 127
 128                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 129                 if (tmp) {
 130                         /* make sure wdev exists */
 131                         mutex_lock(&tmp->devlist_mtx);
 132                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 133                                 if (wdev->identifier != (u32)wdev_id)
 134                                         continue;
 135                                 found = true;
 136                                 break;
 137                         }
 138                         mutex_unlock(&tmp->devlist_mtx);
 139
 140                         if (!found)
 141                                 tmp = NULL;
 142
 143                         if (rdev && tmp != rdev)
 144                                 return ERR_PTR(-EINVAL);
 145                         rdev = tmp;
 146                 }
 147         }
 148
 149         if (attrs[NL80211_ATTR_IFINDEX]) {
 150                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 151                 netdev = dev_get_by_index(netns, ifindex);
 152                 if (netdev) {
 153                         if (netdev->ieee80211_ptr)
 154                                 tmp = wiphy_to_dev(
 155                                                 netdev->ieee80211_ptr->wiphy);
 156                         else
 157                                 tmp = NULL;
 158
 159                         dev_put(netdev);
 160
 161                         /* not wireless device -- return error */
 162                         if (!tmp)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         /* mismatch -- return error */
 166                         if (rdev && tmp != rdev)
 167                                 return ERR_PTR(-EINVAL);
 168
 169                         rdev = tmp;
 170                 }
 171         }
 172
 173         if (!rdev)
 174                 return ERR_PTR(-ENODEV);
 175
 176         if (netns != wiphy_net(&rdev->wiphy))
 177                 return ERR_PTR(-ENODEV);
 178
 179         return rdev;
 180 }
 181
 182 /*
 183  * This function returns a pointer to the driver
 184  * that the genl_info item that is passed refers to.
 185  * If successful, it returns non-NULL and also locks
 186  * the driver's mutex!
 187  *
 188  * This means that you need to call cfg80211_unlock_rdev()
 189  * before being allowed to acquire &cfg80211_mutex!
 190  *
 191  * This is necessary because we need to lock the global
 192  * mutex to get an item off the list safely, and then
 193  * we lock the rdev mutex so it doesn't go away under us.
 194  *
 195  * We don't want to keep cfg80211_mutex locked
 196  * for all the time in order to allow requests on
 197  * other interfaces to go through at the same time.
 198  *
 199  * The result of this can be a PTR_ERR and hence must
 200  * be checked with IS_ERR() for errors.
 201  */
 202 static struct cfg80211_registered_device *
 203 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 204 {
 205         struct cfg80211_registered_device *rdev;
 206
 207         mutex_lock(&cfg80211_mutex);
 208         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 209
 210         /* if it is not an error we grab the lock on
 211          * it to assure it won't be going away while
 212          * we operate on it */
 213         if (!IS_ERR(rdev))
 214                 mutex_lock(&rdev->mtx);
 215
 216         mutex_unlock(&cfg80211_mutex);
 217
 218         return rdev;
 219 }
 220
 221 /* policy for the attributes */
 222 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 223         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 224         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 225                                       .len = 20-1 },
 226         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 227
 228         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 232         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 233
 234         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 236         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 238         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 239
 240         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 242         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 243
 244         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 245         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 246
 247         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 248         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 249                                     .len = WLAN_MAX_KEY_LEN },
 250         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 251         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 252         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 253         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 254         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 255
 256         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 257         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 258         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 259                                        .len = IEEE80211_MAX_DATA_LEN },
 260         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 261                                        .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 263         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 264         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 265         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 266                                                .len = NL80211_MAX_SUPP_RATES },
 267         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 268         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 269         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 270         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 271                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 272         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 273
 274         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 275         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 276
 277         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 280         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 281                                            .len = NL80211_MAX_SUPP_RATES },
 282         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 283
 284         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 286
 287         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 288
 289         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 290         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 291                               .len = IEEE80211_MAX_DATA_LEN },
 292         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 293         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 294
 295         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 296                                 .len = IEEE80211_MAX_SSID_LEN },
 297         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 298         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_STA_FLAGS2] = {
 303                 .len = sizeof(struct nl80211_sta_flag_update),
 304         },
 305         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 306         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 307         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 309         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 310         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 311         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 312         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 313         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 314                                  .len = WLAN_PMKID_LEN },
 315         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 316         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 317         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 319                                  .len = IEEE80211_MAX_DATA_LEN },
 320         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 321         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 323         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 326         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 327         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 330         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 331         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 335         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 336         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 339         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 340                                          .len = IEEE80211_MAX_DATA_LEN },
 341         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 342                                          .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 345         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 352         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 353                                       .len = IEEE80211_MAX_DATA_LEN },
 354         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 355         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 356         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 357                 .len = NL80211_HT_CAPABILITY_LEN
 358         },
 359         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 360         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 361         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 362         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 363         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 364         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 365         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 366         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 367         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 368         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 369         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 370         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 371         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 372         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 373 };
 374
 375 /* policy for the key attributes */
 376 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 377         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 378         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 379         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 380         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 381         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 382         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 383         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 384         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 385 };
 386
 387 /* policy for the key default flags */
 388 static const struct nla_policy
 389 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 390         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 391         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 392 };
 393
 394 /* policy for WoWLAN attributes */
 395 static const struct nla_policy
 396 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 397         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 398         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 400         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 401         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 402         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 403         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 404         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 405         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 406 };
 407
 408 static const struct nla_policy
 409 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 410         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 411         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 412         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 413         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 414         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 415         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 416         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 417                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 418         },
 419         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 420                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 421         },
 422         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 423         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 424         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 425 };
 426
 427 /* policy for GTK rekey offload attributes */
 428 static const struct nla_policy
 429 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 430         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 431         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 432         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 433 };
 434
 435 static const struct nla_policy
 436 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 437         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 438                                                  .len = IEEE80211_MAX_SSID_LEN },
 439         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 440 };
 441
 442 /* ifidx get helper */
 443 static int nl80211_get_ifidx(struct netlink_callback *cb)
 444 {
 445         int res;
 446
 447         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 448                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 449                           nl80211_policy);
 450         if (res)
 451                 return res;
 452
 453         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 454                 return -EINVAL;
 455
 456         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 457         if (!res)
 458                 return -EINVAL;
 459         return res;
 460 }
 461
 462 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 463                                        struct netlink_callback *cb,
 464                                        struct cfg80211_registered_device **rdev,
 465                                        struct net_device **dev)
 466 {
 467         int ifidx = cb->args[0];
 468         int err;
 469
 470         if (!ifidx)
 471                 ifidx = nl80211_get_ifidx(cb);
 472         if (ifidx < 0)
 473                 return ifidx;
 474
 475         cb->args[0] = ifidx;
 476
 477         rtnl_lock();
 478
 479         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 480         if (!*dev) {
 481                 err = -ENODEV;
 482                 goto out_rtnl;
 483         }
 484
 485         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 486         if (IS_ERR(*rdev)) {
 487                 err = PTR_ERR(*rdev);
 488                 goto out_rtnl;
 489         }
 490
 491         return 0;
 492  out_rtnl:
 493         rtnl_unlock();
 494         return err;
 495 }
 496
 497 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 498 {
 499         cfg80211_unlock_rdev(rdev);
 500         rtnl_unlock();
 501 }
 502
 503 /* IE validation */
 504 static bool is_valid_ie_attr(const struct nlattr *attr)
 505 {
 506         const u8 *pos;
 507         int len;
 508
 509         if (!attr)
 510                 return true;
 511
 512         pos = nla_data(attr);
 513         len = nla_len(attr);
 514
 515         while (len) {
 516                 u8 elemlen;
 517
 518                 if (len < 2)
 519                         return false;
 520                 len -= 2;
 521
 522                 elemlen = pos[1];
 523                 if (elemlen > len)
 524                         return false;
 525
 526                 len -= elemlen;
 527                 pos += 2 + elemlen;
 528         }
 529
 530         return true;
 531 }
 532
 533 /* message building helper */
 534 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 535                                    int flags, u8 cmd)
 536 {
 537         /* since there is no private header just add the generic one */
 538         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 539 }
 540
 541 static int nl80211_msg_put_channel(struct sk_buff *msg,
 542                                    struct ieee80211_channel *chan)
 543 {
 544         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 545                         chan->center_freq))
 546                 goto nla_put_failure;
 547
 548         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 549             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 550                 goto nla_put_failure;
 551         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 552             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 553                 goto nla_put_failure;
 554         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 555             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 556                 goto nla_put_failure;
 557         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 558             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 559                 goto nla_put_failure;
 560
 561         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 562                         DBM_TO_MBM(chan->max_power)))
 563                 goto nla_put_failure;
 564
 565         return 0;
 566
 567  nla_put_failure:
 568         return -ENOBUFS;
 569 }
 570
 571 /* netlink command implementations */
 572
 573 struct key_parse {
 574         struct key_params p;
 575         int idx;
 576         int type;
 577         bool def, defmgmt;
 578         bool def_uni, def_multi;
 579 };
 580
 581 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 582 {
 583         struct nlattr *tb[NL80211_KEY_MAX + 1];
 584         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 585                                    nl80211_key_policy);
 586         if (err)
 587                 return err;
 588
 589         k->def = !!tb[NL80211_KEY_DEFAULT];
 590         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 591
 592         if (k->def) {
 593                 k->def_uni = true;
 594                 k->def_multi = true;
 595         }
 596         if (k->defmgmt)
 597                 k->def_multi = true;
 598
 599         if (tb[NL80211_KEY_IDX])
 600                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 601
 602         if (tb[NL80211_KEY_DATA]) {
 603                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 604                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 605         }
 606
 607         if (tb[NL80211_KEY_SEQ]) {
 608                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 609                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 610         }
 611
 612         if (tb[NL80211_KEY_CIPHER])
 613                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 614
 615         if (tb[NL80211_KEY_TYPE]) {
 616                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 617                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 618                         return -EINVAL;
 619         }
 620
 621         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 622                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 623                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 624                                        tb[NL80211_KEY_DEFAULT_TYPES],
 625                                        nl80211_key_default_policy);
 626                 if (err)
 627                         return err;
 628
 629                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 630                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 631         }
 632
 633         return 0;
 634 }
 635
 636 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 637 {
 638         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 639                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 640                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 641         }
 642
 643         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 644                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 645                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 646         }
 647
 648         if (info->attrs[NL80211_ATTR_KEY_IDX])
 649                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 650
 651         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 652                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 653
 654         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 655         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 656
 657         if (k->def) {
 658                 k->def_uni = true;
 659                 k->def_multi = true;
 660         }
 661         if (k->defmgmt)
 662                 k->def_multi = true;
 663
 664         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 665                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 666                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 667                         return -EINVAL;
 668         }
 669
 670         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 671                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 672                 int err = nla_parse_nested(
 673                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 674                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 675                                 nl80211_key_default_policy);
 676                 if (err)
 677                         return err;
 678
 679                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 680                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 681         }
 682
 683         return 0;
 684 }
 685
 686 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 687 {
 688         int err;
 689
 690         memset(k, 0, sizeof(*k));
 691         k->idx = -1;
 692         k->type = -1;
 693
 694         if (info->attrs[NL80211_ATTR_KEY])
 695                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 696         else
 697                 err = nl80211_parse_key_old(info, k);
 698
 699         if (err)
 700                 return err;
 701
 702         if (k->def && k->defmgmt)
 703                 return -EINVAL;
 704
 705         if (k->defmgmt) {
 706                 if (k->def_uni || !k->def_multi)
 707                         return -EINVAL;
 708         }
 709
 710         if (k->idx != -1) {
 711                 if (k->defmgmt) {
 712                         if (k->idx < 4 || k->idx > 5)
 713                                 return -EINVAL;
 714                 } else if (k->def) {
 715                         if (k->idx < 0 || k->idx > 3)
 716                                 return -EINVAL;
 717                 } else {
 718                         if (k->idx < 0 || k->idx > 5)
 719                                 return -EINVAL;
 720                 }
 721         }
 722
 723         return 0;
 724 }
 725
 726 static struct cfg80211_cached_keys *
 727 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 728                        struct nlattr *keys, bool *no_ht)
 729 {
 730         struct key_parse parse;
 731         struct nlattr *key;
 732         struct cfg80211_cached_keys *result;
 733         int rem, err, def = 0;
 734
 735         result = kzalloc(sizeof(*result), GFP_KERNEL);
 736         if (!result)
 737                 return ERR_PTR(-ENOMEM);
 738
 739         result->def = -1;
 740         result->defmgmt = -1;
 741
 742         nla_for_each_nested(key, keys, rem) {
 743                 memset(&parse, 0, sizeof(parse));
 744                 parse.idx = -1;
 745
 746                 err = nl80211_parse_key_new(key, &parse);
 747                 if (err)
 748                         goto error;
 749                 err = -EINVAL;
 750                 if (!parse.p.key)
 751                         goto error;
 752                 if (parse.idx < 0 || parse.idx > 4)
 753                         goto error;
 754                 if (parse.def) {
 755                         if (def)
 756                                 goto error;
 757                         def = 1;
 758                         result->def = parse.idx;
 759                         if (!parse.def_uni || !parse.def_multi)
 760                                 goto error;
 761                 } else if (parse.defmgmt)
 762                         goto error;
 763                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 764                                                      parse.idx, false, NULL);
 765                 if (err)
 766                         goto error;
 767                 result->params[parse.idx].cipher = parse.p.cipher;
 768                 result->params[parse.idx].key_len = parse.p.key_len;
 769                 result->params[parse.idx].key = result->data[parse.idx];
 770                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 771
 772                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 773                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 774                         if (no_ht)
 775                                 *no_ht = true;
 776                 }
 777         }
 778
 779         return result;
 780  error:
 781         kfree(result);
 782         return ERR_PTR(err);
 783 }
 784
 785 static int nl80211_key_allowed(struct wireless_dev *wdev)
 786 {
 787         ASSERT_WDEV_LOCK(wdev);
 788
 789         switch (wdev->iftype) {
 790         case NL80211_IFTYPE_AP:
 791         case NL80211_IFTYPE_AP_VLAN:
 792         case NL80211_IFTYPE_P2P_GO:
 793         case NL80211_IFTYPE_MESH_POINT:
 794                 break;
 795         case NL80211_IFTYPE_ADHOC:
 796                 if (!wdev->current_bss)
 797                         return -ENOLINK;
 798                 break;
 799         case NL80211_IFTYPE_STATION:
 800         case NL80211_IFTYPE_P2P_CLIENT:
 801                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 802                         return -ENOLINK;
 803                 break;
 804         default:
 805                 return -EINVAL;
 806         }
 807
 808         return 0;
 809 }
 810
 811 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 812 {
 813         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 814         int i;
 815
 816         if (!nl_modes)
 817                 goto nla_put_failure;
 818
 819         i = 0;
 820         while (ifmodes) {
 821                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 822                         goto nla_put_failure;
 823                 ifmodes >>= 1;
 824                 i++;
 825         }
 826
 827         nla_nest_end(msg, nl_modes);
 828         return 0;
 829
 830 nla_put_failure:
 831         return -ENOBUFS;
 832 }
 833
 834 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 835                                           struct sk_buff *msg)
 836 {
 837         struct nlattr *nl_combis;
 838         int i, j;
 839
 840         nl_combis = nla_nest_start(msg,
 841                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 842         if (!nl_combis)
 843                 goto nla_put_failure;
 844
 845         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 846                 const struct ieee80211_iface_combination *c;
 847                 struct nlattr *nl_combi, *nl_limits;
 848
 849                 c = &wiphy->iface_combinations[i];
 850
 851                 nl_combi = nla_nest_start(msg, i + 1);
 852                 if (!nl_combi)
 853                         goto nla_put_failure;
 854
 855                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 856                 if (!nl_limits)
 857                         goto nla_put_failure;
 858
 859                 for (j = 0; j < c->n_limits; j++) {
 860                         struct nlattr *nl_limit;
 861
 862                         nl_limit = nla_nest_start(msg, j + 1);
 863                         if (!nl_limit)
 864                                 goto nla_put_failure;
 865                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 866                                         c->limits[j].max))
 867                                 goto nla_put_failure;
 868                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 869                                                 c->limits[j].types))
 870                                 goto nla_put_failure;
 871                         nla_nest_end(msg, nl_limit);
 872                 }
 873
 874                 nla_nest_end(msg, nl_limits);
 875
 876                 if (c->beacon_int_infra_match &&
 877                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 878                         goto nla_put_failure;
 879                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 880                                 c->num_different_channels) ||
 881                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 882                                 c->max_interfaces))
 883                         goto nla_put_failure;
 884
 885                 nla_nest_end(msg, nl_combi);
 886         }
 887
 888         nla_nest_end(msg, nl_combis);
 889
 890         return 0;
 891 nla_put_failure:
 892         return -ENOBUFS;
 893 }
 894
 895 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 896                               struct cfg80211_registered_device *dev)
 897 {
 898         void *hdr;
 899         struct nlattr *nl_bands, *nl_band;
 900         struct nlattr *nl_freqs, *nl_freq;
 901         struct nlattr *nl_rates, *nl_rate;
 902         struct nlattr *nl_cmds;
 903         enum ieee80211_band band;
 904         struct ieee80211_channel *chan;
 905         struct ieee80211_rate *rate;
 906         int i;
 907         const struct ieee80211_txrx_stypes *mgmt_stypes =
 908                                 dev->wiphy.mgmt_stypes;
 909
 910         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 911         if (!hdr)
 912                 return -1;
 913
 914         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 915             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 916             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 917                         cfg80211_rdev_list_generation) ||
 918             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 919                        dev->wiphy.retry_short) ||
 920             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 921                        dev->wiphy.retry_long) ||
 922             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 923                         dev->wiphy.frag_threshold) ||
 924             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 925                         dev->wiphy.rts_threshold) ||
 926             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 927                        dev->wiphy.coverage_class) ||
 928             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 929                        dev->wiphy.max_scan_ssids) ||
 930             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 931                        dev->wiphy.max_sched_scan_ssids) ||
 932             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 933                         dev->wiphy.max_scan_ie_len) ||
 934             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 935                         dev->wiphy.max_sched_scan_ie_len) ||
 936             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 937                        dev->wiphy.max_match_sets))
 938                 goto nla_put_failure;
 939
 940         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 941             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 942                 goto nla_put_failure;
 943         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 944             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 945                 goto nla_put_failure;
 946         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 947             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 948                 goto nla_put_failure;
 949         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 950             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 951                 goto nla_put_failure;
 952         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 953             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 954                 goto nla_put_failure;
 955         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 956             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 957                 goto nla_put_failure;
 958
 959         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 960                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 961                     dev->wiphy.cipher_suites))
 962                 goto nla_put_failure;
 963
 964         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 965                        dev->wiphy.max_num_pmkids))
 966                 goto nla_put_failure;
 967
 968         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 969             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 970                 goto nla_put_failure;
 971
 972         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 973                         dev->wiphy.available_antennas_tx) ||
 974             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 975                         dev->wiphy.available_antennas_rx))
 976                 goto nla_put_failure;
 977
 978         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 979             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 980                         dev->wiphy.probe_resp_offload))
 981                 goto nla_put_failure;
 982
 983         if ((dev->wiphy.available_antennas_tx ||
 984              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 985                 u32 tx_ant = 0, rx_ant = 0;
 986                 int res;
 987                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 988                 if (!res) {
 989                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 990                                         tx_ant) ||
 991                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 992                                         rx_ant))
 993                                 goto nla_put_failure;
 994                 }
 995         }
 996
 997         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 998                                 dev->wiphy.interface_modes))
 999                 goto nla_put_failure;
1000
1001         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1002         if (!nl_bands)
1003                 goto nla_put_failure;
1004
1005         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1006                 if (!dev->wiphy.bands[band])
1007                         continue;
1008
1009                 nl_band = nla_nest_start(msg, band);
1010                 if (!nl_band)
1011                         goto nla_put_failure;
1012
1013                 /* add HT info */
1014                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
1015                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1016                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
1017                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
1018                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1019                                  dev->wiphy.bands[band]->ht_cap.cap) ||
1020                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1021                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
1022                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1023                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
1024                         goto nla_put_failure;
1025
1026                 /* add VHT info */
1027                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1028                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1029                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1030                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1031                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1032                                  dev->wiphy.bands[band]->vht_cap.cap)))
1033                         goto nla_put_failure;
1034
1035                 /* add frequencies */
1036                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1037                 if (!nl_freqs)
1038                         goto nla_put_failure;
1039
1040                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1041                         nl_freq = nla_nest_start(msg, i);
1042                         if (!nl_freq)
1043                                 goto nla_put_failure;
1044
1045                         chan = &dev->wiphy.bands[band]->channels[i];
1046
1047                         if (nl80211_msg_put_channel(msg, chan))
1048                                 goto nla_put_failure;
1049
1050                         nla_nest_end(msg, nl_freq);
1051                 }
1052
1053                 nla_nest_end(msg, nl_freqs);
1054
1055                 /* add bitrates */
1056                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1057                 if (!nl_rates)
1058                         goto nla_put_failure;
1059
1060                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1061                         nl_rate = nla_nest_start(msg, i);
1062                         if (!nl_rate)
1063                                 goto nla_put_failure;
1064
1065                         rate = &dev->wiphy.bands[band]->bitrates[i];
1066                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1067                                         rate->bitrate))
1068                                 goto nla_put_failure;
1069                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1070                             nla_put_flag(msg,
1071                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1072                                 goto nla_put_failure;
1073
1074                         nla_nest_end(msg, nl_rate);
1075                 }
1076
1077                 nla_nest_end(msg, nl_rates);
1078
1079                 nla_nest_end(msg, nl_band);
1080         }
1081         nla_nest_end(msg, nl_bands);
1082
1083         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1084         if (!nl_cmds)
1085                 goto nla_put_failure;
1086
1087         i = 0;
1088 #define CMD(op, n)                                              \
1089          do {                                                   \
1090                 if (dev->ops->op) {                             \
1091                         i++;                                    \
1092                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1093                                 goto nla_put_failure;           \
1094                 }                                               \
1095         } while (0)
1096
1097         CMD(add_virtual_intf, NEW_INTERFACE);
1098         CMD(change_virtual_intf, SET_INTERFACE);
1099         CMD(add_key, NEW_KEY);
1100         CMD(start_ap, START_AP);
1101         CMD(add_station, NEW_STATION);
1102         CMD(add_mpath, NEW_MPATH);
1103         CMD(update_mesh_config, SET_MESH_CONFIG);
1104         CMD(change_bss, SET_BSS);
1105         CMD(auth, AUTHENTICATE);
1106         CMD(assoc, ASSOCIATE);
1107         CMD(deauth, DEAUTHENTICATE);
1108         CMD(disassoc, DISASSOCIATE);
1109         CMD(join_ibss, JOIN_IBSS);
1110         CMD(join_mesh, JOIN_MESH);
1111         CMD(set_pmksa, SET_PMKSA);
1112         CMD(del_pmksa, DEL_PMKSA);
1113         CMD(flush_pmksa, FLUSH_PMKSA);
1114         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1115                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1116         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1117         CMD(mgmt_tx, FRAME);
1118         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1119         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1120                 i++;
1121                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1122                         goto nla_put_failure;
1123         }
1124         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1125             dev->ops->join_mesh) {
1126                 i++;
1127                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1128                         goto nla_put_failure;
1129         }
1130         CMD(set_wds_peer, SET_WDS_PEER);
1131         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1132                 CMD(tdls_mgmt, TDLS_MGMT);
1133                 CMD(tdls_oper, TDLS_OPER);
1134         }
1135         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1136                 CMD(sched_scan_start, START_SCHED_SCAN);
1137         CMD(probe_client, PROBE_CLIENT);
1138         CMD(set_noack_map, SET_NOACK_MAP);
1139         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1140                 i++;
1141                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1142                         goto nla_put_failure;
1143         }
1144         CMD(start_p2p_device, START_P2P_DEVICE);
1145         CMD(set_mcast_rate, SET_MCAST_RATE);
1146
1147 #ifdef CONFIG_NL80211_TESTMODE
1148         CMD(testmode_cmd, TESTMODE);
1149 #endif
1150
1151 #undef CMD
1152
1153         if (dev->ops->connect || dev->ops->auth) {
1154                 i++;
1155                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1156                         goto nla_put_failure;
1157         }
1158
1159         if (dev->ops->disconnect || dev->ops->deauth) {
1160                 i++;
1161                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1162                         goto nla_put_failure;
1163         }
1164
1165         nla_nest_end(msg, nl_cmds);
1166
1167         if (dev->ops->remain_on_channel &&
1168             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1169             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1170                         dev->wiphy.max_remain_on_channel_duration))
1171                 goto nla_put_failure;
1172
1173         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1174             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1175                 goto nla_put_failure;
1176
1177         if (mgmt_stypes) {
1178                 u16 stypes;
1179                 struct nlattr *nl_ftypes, *nl_ifs;
1180                 enum nl80211_iftype ift;
1181
1182                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1183                 if (!nl_ifs)
1184                         goto nla_put_failure;
1185
1186                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1187                         nl_ftypes = nla_nest_start(msg, ift);
1188                         if (!nl_ftypes)
1189                                 goto nla_put_failure;
1190                         i = 0;
1191                         stypes = mgmt_stypes[ift].tx;
1192                         while (stypes) {
1193                                 if ((stypes & 1) &&
1194                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1195                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1196                                         goto nla_put_failure;
1197                                 stypes >>= 1;
1198                                 i++;
1199                         }
1200                         nla_nest_end(msg, nl_ftypes);
1201                 }
1202
1203                 nla_nest_end(msg, nl_ifs);
1204
1205                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1206                 if (!nl_ifs)
1207                         goto nla_put_failure;
1208
1209                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1210                         nl_ftypes = nla_nest_start(msg, ift);
1211                         if (!nl_ftypes)
1212                                 goto nla_put_failure;
1213                         i = 0;
1214                         stypes = mgmt_stypes[ift].rx;
1215                         while (stypes) {
1216                                 if ((stypes & 1) &&
1217                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1218                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1219                                         goto nla_put_failure;
1220                                 stypes >>= 1;
1221                                 i++;
1222                         }
1223                         nla_nest_end(msg, nl_ftypes);
1224                 }
1225                 nla_nest_end(msg, nl_ifs);
1226         }
1227
1228 #ifdef CONFIG_PM
1229         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1230                 struct nlattr *nl_wowlan;
1231
1232                 nl_wowlan = nla_nest_start(msg,
1233                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1234                 if (!nl_wowlan)
1235                         goto nla_put_failure;
1236
1237                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1238                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1239                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1240                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1241                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1242                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1243                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1244                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1245                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1246                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1247                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1248                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1249                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1250                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1251                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1252                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1253                     goto nla_put_failure;
1254                 if (dev->wiphy.wowlan.n_patterns) {
1255                         struct nl80211_wowlan_pattern_support pat = {
1256                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1257                                 .min_pattern_len =
1258                                         dev->wiphy.wowlan.pattern_min_len,
1259                                 .max_pattern_len =
1260                                         dev->wiphy.wowlan.pattern_max_len,
1261                                 .max_pkt_offset =
1262                                         dev->wiphy.wowlan.max_pkt_offset,
1263                         };
1264                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1265                                     sizeof(pat), &pat))
1266                                 goto nla_put_failure;
1267                 }
1268
1269                 nla_nest_end(msg, nl_wowlan);
1270         }
1271 #endif
1272
1273         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1274                                 dev->wiphy.software_iftypes))
1275                 goto nla_put_failure;
1276
1277         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1278                 goto nla_put_failure;
1279
1280         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1281             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1282                         dev->wiphy.ap_sme_capa))
1283                 goto nla_put_failure;
1284
1285         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1286                         dev->wiphy.features))
1287                 goto nla_put_failure;
1288
1289         if (dev->wiphy.ht_capa_mod_mask &&
1290             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1291                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1292                     dev->wiphy.ht_capa_mod_mask))
1293                 goto nla_put_failure;
1294
1295         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1296             dev->wiphy.max_acl_mac_addrs &&
1297             nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1298                         dev->wiphy.max_acl_mac_addrs))
1299                 goto nla_put_failure;
1300
1301         return genlmsg_end(msg, hdr);
1302
1303  nla_put_failure:
1304         genlmsg_cancel(msg, hdr);
1305         return -EMSGSIZE;
1306 }
1307
1308 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1309 {
1310         int idx = 0;
1311         int start = cb->args[0];
1312         struct cfg80211_registered_device *dev;
1313
1314         mutex_lock(&cfg80211_mutex);
1315         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1316                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1317                         continue;
1318                 if (++idx <= start)
1319                         continue;
1320                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1321                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1322                                        dev) < 0) {
1323                         idx--;
1324                         break;
1325                 }
1326         }
1327         mutex_unlock(&cfg80211_mutex);
1328
1329         cb->args[0] = idx;
1330
1331         return skb->len;
1332 }
1333
1334 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1335 {
1336         struct sk_buff *msg;
1337         struct cfg80211_registered_device *dev = info->user_ptr[0];
1338
1339         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1340         if (!msg)
1341                 return -ENOMEM;
1342
1343         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1344                 nlmsg_free(msg);
1345                 return -ENOBUFS;
1346         }
1347
1348         return genlmsg_reply(msg, info);
1349 }
1350
1351 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1352         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1353         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1354         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1355         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1356         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1357 };
1358
1359 static int parse_txq_params(struct nlattr *tb[],
1360                             struct ieee80211_txq_params *txq_params)
1361 {
1362         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1363             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1364             !tb[NL80211_TXQ_ATTR_AIFS])
1365                 return -EINVAL;
1366
1367         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1368         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1369         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1370         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1371         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1372
1373         if (txq_params->ac >= NL80211_NUM_ACS)
1374                 return -EINVAL;
1375
1376         return 0;
1377 }
1378
1379 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1380 {
1381         /*
1382          * You can only set the channel explicitly for WDS interfaces,
1383          * all others have their channel managed via their respective
1384          * "establish a connection" command (connect, join, ...)
1385          *
1386          * For AP/GO and mesh mode, the channel can be set with the
1387          * channel userspace API, but is only stored and passed to the
1388          * low-level driver when the AP starts or the mesh is joined.
1389          * This is for backward compatibility, userspace can also give
1390          * the channel in the start-ap or join-mesh commands instead.
1391          *
1392          * Monitors are special as they are normally slaved to
1393          * whatever else is going on, so they have their own special
1394          * operation to set the monitor channel if possible.
1395          */
1396         return !wdev ||
1397                 wdev->iftype == NL80211_IFTYPE_AP ||
1398                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1399                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1400                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1401 }
1402
1403 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1404                                  struct genl_info *info,
1405                                  struct cfg80211_chan_def *chandef)
1406 {
1407         u32 control_freq;
1408
1409         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1410                 return -EINVAL;
1411
1412         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1413
1414         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1415         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1416         chandef->center_freq1 = control_freq;
1417         chandef->center_freq2 = 0;
1418
1419         /* Primary channel not allowed */
1420         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1421                 return -EINVAL;
1422
1423         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1424                 enum nl80211_channel_type chantype;
1425
1426                 chantype = nla_get_u32(
1427                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1428
1429                 switch (chantype) {
1430                 case NL80211_CHAN_NO_HT:
1431                 case NL80211_CHAN_HT20:
1432                 case NL80211_CHAN_HT40PLUS:
1433                 case NL80211_CHAN_HT40MINUS:
1434                         cfg80211_chandef_create(chandef, chandef->chan,
1435                                                 chantype);
1436                         break;
1437                 default:
1438                         return -EINVAL;
1439                 }
1440         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1441                 chandef->width =
1442                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1443                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1444                         chandef->center_freq1 =
1445                                 nla_get_u32(
1446                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1447                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1448                         chandef->center_freq2 =
1449                                 nla_get_u32(
1450                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1451         }
1452
1453         if (!cfg80211_chandef_valid(chandef))
1454                 return -EINVAL;
1455
1456         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1457                                      IEEE80211_CHAN_DISABLED))
1458                 return -EINVAL;
1459
1460         return 0;
1461 }
1462
1463 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1464                                  struct wireless_dev *wdev,
1465                                  struct genl_info *info)
1466 {
1467         struct cfg80211_chan_def chandef;
1468         int result;
1469         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1470
1471         if (wdev)
1472                 iftype = wdev->iftype;
1473
1474         if (!nl80211_can_set_dev_channel(wdev))
1475                 return -EOPNOTSUPP;
1476
1477         result = nl80211_parse_chandef(rdev, info, &chandef);
1478         if (result)
1479                 return result;
1480
1481         mutex_lock(&rdev->devlist_mtx);
1482         switch (iftype) {
1483         case NL80211_IFTYPE_AP:
1484         case NL80211_IFTYPE_P2P_GO:
1485                 if (wdev->beacon_interval) {
1486                         result = -EBUSY;
1487                         break;
1488                 }
1489                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1490                         result = -EINVAL;
1491                         break;
1492                 }
1493                 wdev->preset_chandef = chandef;
1494                 result = 0;
1495                 break;
1496         case NL80211_IFTYPE_MESH_POINT:
1497                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1498                 break;
1499         case NL80211_IFTYPE_MONITOR:
1500                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1501                 break;
1502         default:
1503                 result = -EINVAL;
1504         }
1505         mutex_unlock(&rdev->devlist_mtx);
1506
1507         return result;
1508 }
1509
1510 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1511 {
1512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1513         struct net_device *netdev = info->user_ptr[1];
1514
1515         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1516 }
1517
1518 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1519 {
1520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1521         struct net_device *dev = info->user_ptr[1];
1522         struct wireless_dev *wdev = dev->ieee80211_ptr;
1523         const u8 *bssid;
1524
1525         if (!info->attrs[NL80211_ATTR_MAC])
1526                 return -EINVAL;
1527
1528         if (netif_running(dev))
1529                 return -EBUSY;
1530
1531         if (!rdev->ops->set_wds_peer)
1532                 return -EOPNOTSUPP;
1533
1534         if (wdev->iftype != NL80211_IFTYPE_WDS)
1535                 return -EOPNOTSUPP;
1536
1537         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1538         return rdev_set_wds_peer(rdev, dev, bssid);
1539 }
1540
1541
1542 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1543 {
1544         struct cfg80211_registered_device *rdev;
1545         struct net_device *netdev = NULL;
1546         struct wireless_dev *wdev;
1547         int result = 0, rem_txq_params = 0;
1548         struct nlattr *nl_txq_params;
1549         u32 changed;
1550         u8 retry_short = 0, retry_long = 0;
1551         u32 frag_threshold = 0, rts_threshold = 0;
1552         u8 coverage_class = 0;
1553
1554         /*
1555          * Try to find the wiphy and netdev. Normally this
1556          * function shouldn't need the netdev, but this is
1557          * done for backward compatibility -- previously
1558          * setting the channel was done per wiphy, but now
1559          * it is per netdev. Previous userland like hostapd
1560          * also passed a netdev to set_wiphy, so that it is
1561          * possible to let that go to the right netdev!
1562          */
1563         mutex_lock(&cfg80211_mutex);
1564
1565         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1566                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1567
1568                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1569                 if (netdev && netdev->ieee80211_ptr) {
1570                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1571                         mutex_lock(&rdev->mtx);
1572                 } else
1573                         netdev = NULL;
1574         }
1575
1576         if (!netdev) {
1577                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1578                                                   info->attrs);
1579                 if (IS_ERR(rdev)) {
1580                         mutex_unlock(&cfg80211_mutex);
1581                         return PTR_ERR(rdev);
1582                 }
1583                 wdev = NULL;
1584                 netdev = NULL;
1585                 result = 0;
1586
1587                 mutex_lock(&rdev->mtx);
1588         } else
1589                 wdev = netdev->ieee80211_ptr;
1590
1591         /*
1592          * end workaround code, by now the rdev is available
1593          * and locked, and wdev may or may not be NULL.
1594          */
1595
1596         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1597                 result = cfg80211_dev_rename(
1598                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1599
1600         mutex_unlock(&cfg80211_mutex);
1601
1602         if (result)
1603                 goto bad_res;
1604
1605         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1606                 struct ieee80211_txq_params txq_params;
1607                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1608
1609                 if (!rdev->ops->set_txq_params) {
1610                         result = -EOPNOTSUPP;
1611                         goto bad_res;
1612                 }
1613
1614                 if (!netdev) {
1615                         result = -EINVAL;
1616                         goto bad_res;
1617                 }
1618
1619                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1620                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1621                         result = -EINVAL;
1622                         goto bad_res;
1623                 }
1624
1625                 if (!netif_running(netdev)) {
1626                         result = -ENETDOWN;
1627                         goto bad_res;
1628                 }
1629
1630                 nla_for_each_nested(nl_txq_params,
1631                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1632                                     rem_txq_params) {
1633                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1634                                   nla_data(nl_txq_params),
1635                                   nla_len(nl_txq_params),
1636                                   txq_params_policy);
1637                         result = parse_txq_params(tb, &txq_params);
1638                         if (result)
1639                                 goto bad_res;
1640
1641                         result = rdev_set_txq_params(rdev, netdev,
1642                                                      &txq_params);
1643                         if (result)
1644                                 goto bad_res;
1645                 }
1646         }
1647
1648         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1649                 result = __nl80211_set_channel(rdev,
1650                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1651                                 info);
1652                 if (result)
1653                         goto bad_res;
1654         }
1655
1656         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1657                 struct wireless_dev *txp_wdev = wdev;
1658                 enum nl80211_tx_power_setting type;
1659                 int idx, mbm = 0;
1660
1661                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1662                         txp_wdev = NULL;
1663
1664                 if (!rdev->ops->set_tx_power) {
1665                         result = -EOPNOTSUPP;
1666                         goto bad_res;
1667                 }
1668
1669                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1670                 type = nla_get_u32(info->attrs[idx]);
1671
1672                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1673                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1674                         result = -EINVAL;
1675                         goto bad_res;
1676                 }
1677
1678                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1679                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1680                         mbm = nla_get_u32(info->attrs[idx]);
1681                 }
1682
1683                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1684                 if (result)
1685                         goto bad_res;
1686         }
1687
1688         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1689             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1690                 u32 tx_ant, rx_ant;
1691                 if ((!rdev->wiphy.available_antennas_tx &&
1692                      !rdev->wiphy.available_antennas_rx) ||
1693                     !rdev->ops->set_antenna) {
1694                         result = -EOPNOTSUPP;
1695                         goto bad_res;
1696                 }
1697
1698                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1699                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1700
1701                 /* reject antenna configurations which don't match the
1702                  * available antenna masks, except for the "all" mask */
1703                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1704                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1705                         result = -EINVAL;
1706                         goto bad_res;
1707                 }
1708
1709                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1710                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1711
1712                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1713                 if (result)
1714                         goto bad_res;
1715         }
1716
1717         changed = 0;
1718
1719         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1720                 retry_short = nla_get_u8(
1721                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1722                 if (retry_short == 0) {
1723                         result = -EINVAL;
1724                         goto bad_res;
1725                 }
1726                 changed |= WIPHY_PARAM_RETRY_SHORT;
1727         }
1728
1729         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1730                 retry_long = nla_get_u8(
1731                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1732                 if (retry_long == 0) {
1733                         result = -EINVAL;
1734                         goto bad_res;
1735                 }
1736                 changed |= WIPHY_PARAM_RETRY_LONG;
1737         }
1738
1739         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1740                 frag_threshold = nla_get_u32(
1741                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1742                 if (frag_threshold < 256) {
1743                         result = -EINVAL;
1744                         goto bad_res;
1745                 }
1746                 if (frag_threshold != (u32) -1) {
1747                         /*
1748                          * Fragments (apart from the last one) are required to
1749                          * have even length. Make the fragmentation code
1750                          * simpler by stripping LSB should someone try to use
1751                          * odd threshold value.
1752                          */
1753                         frag_threshold &= ~0x1;
1754                 }
1755                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1756         }
1757
1758         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1759                 rts_threshold = nla_get_u32(
1760                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1761                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1762         }
1763
1764         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1765                 coverage_class = nla_get_u8(
1766                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1767                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1768         }
1769
1770         if (changed) {
1771                 u8 old_retry_short, old_retry_long;
1772                 u32 old_frag_threshold, old_rts_threshold;
1773                 u8 old_coverage_class;
1774
1775                 if (!rdev->ops->set_wiphy_params) {
1776                         result = -EOPNOTSUPP;
1777                         goto bad_res;
1778                 }
1779
1780                 old_retry_short = rdev->wiphy.retry_short;
1781                 old_retry_long = rdev->wiphy.retry_long;
1782                 old_frag_threshold = rdev->wiphy.frag_threshold;
1783                 old_rts_threshold = rdev->wiphy.rts_threshold;
1784                 old_coverage_class = rdev->wiphy.coverage_class;
1785
1786                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1787                         rdev->wiphy.retry_short = retry_short;
1788                 if (changed & WIPHY_PARAM_RETRY_LONG)
1789                         rdev->wiphy.retry_long = retry_long;
1790                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1791                         rdev->wiphy.frag_threshold = frag_threshold;
1792                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1793                         rdev->wiphy.rts_threshold = rts_threshold;
1794                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1795                         rdev->wiphy.coverage_class = coverage_class;
1796
1797                 result = rdev_set_wiphy_params(rdev, changed);
1798                 if (result) {
1799                         rdev->wiphy.retry_short = old_retry_short;
1800                         rdev->wiphy.retry_long = old_retry_long;
1801                         rdev->wiphy.frag_threshold = old_frag_threshold;
1802                         rdev->wiphy.rts_threshold = old_rts_threshold;
1803                         rdev->wiphy.coverage_class = old_coverage_class;
1804                 }
1805         }
1806
1807  bad_res:
1808         mutex_unlock(&rdev->mtx);
1809         if (netdev)
1810                 dev_put(netdev);
1811         return result;
1812 }
1813
1814 static inline u64 wdev_id(struct wireless_dev *wdev)
1815 {
1816         return (u64)wdev->identifier |
1817                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1818 }
1819
1820 static int nl80211_send_chandef(struct sk_buff *msg,
1821                                  struct cfg80211_chan_def *chandef)
1822 {
1823         WARN_ON(!cfg80211_chandef_valid(chandef));
1824
1825         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1826                         chandef->chan->center_freq))
1827                 return -ENOBUFS;
1828         switch (chandef->width) {
1829         case NL80211_CHAN_WIDTH_20_NOHT:
1830         case NL80211_CHAN_WIDTH_20:
1831         case NL80211_CHAN_WIDTH_40:
1832                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1833                                 cfg80211_get_chandef_type(chandef)))
1834                         return -ENOBUFS;
1835                 break;
1836         default:
1837                 break;
1838         }
1839         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1840                 return -ENOBUFS;
1841         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1842                 return -ENOBUFS;
1843         if (chandef->center_freq2 &&
1844             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1845                 return -ENOBUFS;
1846         return 0;
1847 }
1848
1849 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1850                               struct cfg80211_registered_device *rdev,
1851                               struct wireless_dev *wdev)
1852 {
1853         struct net_device *dev = wdev->netdev;
1854         void *hdr;
1855
1856         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1857         if (!hdr)
1858                 return -1;
1859
1860         if (dev &&
1861             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1862              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1863                 goto nla_put_failure;
1864
1865         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1866             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1867             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1868             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1869             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1870                         rdev->devlist_generation ^
1871                         (cfg80211_rdev_list_generation << 2)))
1872                 goto nla_put_failure;
1873
1874         if (rdev->ops->get_channel) {
1875                 int ret;
1876                 struct cfg80211_chan_def chandef;
1877
1878                 ret = rdev_get_channel(rdev, wdev, &chandef);
1879                 if (ret == 0) {
1880                         if (nl80211_send_chandef(msg, &chandef))
1881                                 goto nla_put_failure;
1882                 }
1883         }
1884
1885         if (wdev->ssid_len) {
1886                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1887                         goto nla_put_failure;
1888         }
1889
1890         return genlmsg_end(msg, hdr);
1891
1892  nla_put_failure:
1893         genlmsg_cancel(msg, hdr);
1894         return -EMSGSIZE;
1895 }
1896
1897 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1898 {
1899         int wp_idx = 0;
1900         int if_idx = 0;
1901         int wp_start = cb->args[0];
1902         int if_start = cb->args[1];
1903         struct cfg80211_registered_device *rdev;
1904         struct wireless_dev *wdev;
1905
1906         mutex_lock(&cfg80211_mutex);
1907         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1908                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1909                         continue;
1910                 if (wp_idx < wp_start) {
1911                         wp_idx++;
1912                         continue;
1913                 }
1914                 if_idx = 0;
1915
1916                 mutex_lock(&rdev->devlist_mtx);
1917                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1918                         if (if_idx < if_start) {
1919                                 if_idx++;
1920                                 continue;
1921                         }
1922                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1923                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1924                                                rdev, wdev) < 0) {
1925                                 mutex_unlock(&rdev->devlist_mtx);
1926                                 goto out;
1927                         }
1928                         if_idx++;
1929                 }
1930                 mutex_unlock(&rdev->devlist_mtx);
1931
1932                 wp_idx++;
1933         }
1934  out:
1935         mutex_unlock(&cfg80211_mutex);
1936
1937         cb->args[0] = wp_idx;
1938         cb->args[1] = if_idx;
1939
1940         return skb->len;
1941 }
1942
1943 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1944 {
1945         struct sk_buff *msg;
1946         struct cfg80211_registered_device *dev = info->user_ptr[0];
1947         struct wireless_dev *wdev = info->user_ptr[1];
1948
1949         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1950         if (!msg)
1951                 return -ENOMEM;
1952
1953         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1954                                dev, wdev) < 0) {
1955                 nlmsg_free(msg);
1956                 return -ENOBUFS;
1957         }
1958
1959         return genlmsg_reply(msg, info);
1960 }
1961
1962 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1963         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1964         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1965         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1966         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1967         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1968 };
1969
1970 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1971 {
1972         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1973         int flag;
1974
1975         *mntrflags = 0;
1976
1977         if (!nla)
1978                 return -EINVAL;
1979
1980         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1981                              nla, mntr_flags_policy))
1982                 return -EINVAL;
1983
1984         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1985                 if (flags[flag])
1986                         *mntrflags |= (1<<flag);
1987
1988         return 0;
1989 }
1990
1991 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1992                                struct net_device *netdev, u8 use_4addr,
1993                                enum nl80211_iftype iftype)
1994 {
1995         if (!use_4addr) {
1996                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1997                         return -EBUSY;
1998                 return 0;
1999         }
2000
2001         switch (iftype) {
2002         case NL80211_IFTYPE_AP_VLAN:
2003                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2004                         return 0;
2005                 break;
2006         case NL80211_IFTYPE_STATION:
2007                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2008                         return 0;
2009                 break;
2010         default:
2011                 break;
2012         }
2013
2014         return -EOPNOTSUPP;
2015 }
2016
2017 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2018 {
2019         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2020         struct vif_params params;
2021         int err;
2022         enum nl80211_iftype otype, ntype;
2023         struct net_device *dev = info->user_ptr[1];
2024         u32 _flags, *flags = NULL;
2025         bool change = false;
2026
2027         memset(&params, 0, sizeof(params));
2028
2029         otype = ntype = dev->ieee80211_ptr->iftype;
2030
2031         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2032                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2033                 if (otype != ntype)
2034                         change = true;
2035                 if (ntype > NL80211_IFTYPE_MAX)
2036                         return -EINVAL;
2037         }
2038
2039         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2040                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2041
2042                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2043                         return -EINVAL;
2044                 if (netif_running(dev))
2045                         return -EBUSY;
2046
2047                 wdev_lock(wdev);
2048                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2049                              IEEE80211_MAX_MESH_ID_LEN);
2050                 wdev->mesh_id_up_len =
2051                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2052                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2053                        wdev->mesh_id_up_len);
2054                 wdev_unlock(wdev);
2055         }
2056
2057         if (info->attrs[NL80211_ATTR_4ADDR]) {
2058                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2059                 change = true;
2060                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2061                 if (err)
2062                         return err;
2063         } else {
2064                 params.use_4addr = -1;
2065         }
2066
2067         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2068                 if (ntype != NL80211_IFTYPE_MONITOR)
2069                         return -EINVAL;
2070                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2071                                           &_flags);
2072                 if (err)
2073                         return err;
2074
2075                 flags = &_flags;
2076                 change = true;
2077         }
2078
2079         if (change)
2080                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2081         else
2082                 err = 0;
2083
2084         if (!err && params.use_4addr != -1)
2085                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2086
2087         return err;
2088 }
2089
2090 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2091 {
2092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2093         struct vif_params params;
2094         struct wireless_dev *wdev;
2095         struct sk_buff *msg;
2096         int err;
2097         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2098         u32 flags;
2099
2100         memset(&params, 0, sizeof(params));
2101
2102         if (!info->attrs[NL80211_ATTR_IFNAME])
2103                 return -EINVAL;
2104
2105         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2106                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2107                 if (type > NL80211_IFTYPE_MAX)
2108                         return -EINVAL;
2109         }
2110
2111         if (!rdev->ops->add_virtual_intf ||
2112             !(rdev->wiphy.interface_modes & (1 << type)))
2113                 return -EOPNOTSUPP;
2114
2115         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2116                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2117                            ETH_ALEN);
2118                 if (!is_valid_ether_addr(params.macaddr))
2119                         return -EADDRNOTAVAIL;
2120         }
2121
2122         if (info->attrs[NL80211_ATTR_4ADDR]) {
2123                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2124                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2125                 if (err)
2126                         return err;
2127         }
2128
2129         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2130         if (!msg)
2131                 return -ENOMEM;
2132
2133         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2134                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2135                                   &flags);
2136         wdev = rdev_add_virtual_intf(rdev,
2137                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2138                                 type, err ? NULL : &flags, &params);
2139         if (IS_ERR(wdev)) {
2140                 nlmsg_free(msg);
2141                 return PTR_ERR(wdev);
2142         }
2143
2144         switch (type) {
2145         case NL80211_IFTYPE_MESH_POINT:
2146                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2147                         break;
2148                 wdev_lock(wdev);
2149                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2150                              IEEE80211_MAX_MESH_ID_LEN);
2151                 wdev->mesh_id_up_len =
2152                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2153                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2154                        wdev->mesh_id_up_len);
2155                 wdev_unlock(wdev);
2156                 break;
2157         case NL80211_IFTYPE_P2P_DEVICE:
2158                 /*
2159                  * P2P Device doesn't have a netdev, so doesn't go
2160                  * through the netdev notifier and must be added here
2161                  */
2162                 mutex_init(&wdev->mtx);
2163                 INIT_LIST_HEAD(&wdev->event_list);
2164                 spin_lock_init(&wdev->event_lock);
2165                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2166                 spin_lock_init(&wdev->mgmt_registrations_lock);
2167
2168                 mutex_lock(&rdev->devlist_mtx);
2169                 wdev->identifier = ++rdev->wdev_id;
2170                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2171                 rdev->devlist_generation++;
2172                 mutex_unlock(&rdev->devlist_mtx);
2173                 break;
2174         default:
2175                 break;
2176         }
2177
2178         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2179                                rdev, wdev) < 0) {
2180                 nlmsg_free(msg);
2181                 return -ENOBUFS;
2182         }
2183
2184         return genlmsg_reply(msg, info);
2185 }
2186
2187 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2188 {
2189         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2190         struct wireless_dev *wdev = info->user_ptr[1];
2191
2192         if (!rdev->ops->del_virtual_intf)
2193                 return -EOPNOTSUPP;
2194
2195         /*
2196          * If we remove a wireless device without a netdev then clear
2197          * user_ptr[1] so that nl80211_post_doit won't dereference it
2198          * to check if it needs to do dev_put(). Otherwise it crashes
2199          * since the wdev has been freed, unlike with a netdev where
2200          * we need the dev_put() for the netdev to really be freed.
2201          */
2202         if (!wdev->netdev)
2203                 info->user_ptr[1] = NULL;
2204
2205         return rdev_del_virtual_intf(rdev, wdev);
2206 }
2207
2208 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2209 {
2210         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2211         struct net_device *dev = info->user_ptr[1];
2212         u16 noack_map;
2213
2214         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2215                 return -EINVAL;
2216
2217         if (!rdev->ops->set_noack_map)
2218                 return -EOPNOTSUPP;
2219
2220         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2221
2222         return rdev_set_noack_map(rdev, dev, noack_map);
2223 }
2224
2225 struct get_key_cookie {
2226         struct sk_buff *msg;
2227         int error;
2228         int idx;
2229 };
2230
2231 static void get_key_callback(void *c, struct key_params *params)
2232 {
2233         struct nlattr *key;
2234         struct get_key_cookie *cookie = c;
2235
2236         if ((params->key &&
2237              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2238                      params->key_len, params->key)) ||
2239             (params->seq &&
2240              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2241                      params->seq_len, params->seq)) ||
2242             (params->cipher &&
2243              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2244                          params->cipher)))
2245                 goto nla_put_failure;
2246
2247         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2248         if (!key)
2249                 goto nla_put_failure;
2250
2251         if ((params->key &&
2252              nla_put(cookie->msg, NL80211_KEY_DATA,
2253                      params->key_len, params->key)) ||
2254             (params->seq &&
2255              nla_put(cookie->msg, NL80211_KEY_SEQ,
2256                      params->seq_len, params->seq)) ||
2257             (params->cipher &&
2258              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2259                          params->cipher)))
2260                 goto nla_put_failure;
2261
2262         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2263                 goto nla_put_failure;
2264
2265         nla_nest_end(cookie->msg, key);
2266
2267         return;
2268  nla_put_failure:
2269         cookie->error = 1;
2270 }
2271
2272 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2273 {
2274         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2275         int err;
2276         struct net_device *dev = info->user_ptr[1];
2277         u8 key_idx = 0;
2278         const u8 *mac_addr = NULL;
2279         bool pairwise;
2280         struct get_key_cookie cookie = {
2281                 .error = 0,
2282         };
2283         void *hdr;
2284         struct sk_buff *msg;
2285
2286         if (info->attrs[NL80211_ATTR_KEY_IDX])
2287                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2288
2289         if (key_idx > 5)
2290                 return -EINVAL;
2291
2292         if (info->attrs[NL80211_ATTR_MAC])
2293                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2294
2295         pairwise = !!mac_addr;
2296         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2297                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2298                 if (kt >= NUM_NL80211_KEYTYPES)
2299                         return -EINVAL;
2300                 if (kt != NL80211_KEYTYPE_GROUP &&
2301                     kt != NL80211_KEYTYPE_PAIRWISE)
2302                         return -EINVAL;
2303                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2304         }
2305
2306         if (!rdev->ops->get_key)
2307                 return -EOPNOTSUPP;
2308
2309         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2310         if (!msg)
2311                 return -ENOMEM;
2312
2313         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2314                              NL80211_CMD_NEW_KEY);
2315         if (IS_ERR(hdr))
2316                 return PTR_ERR(hdr);
2317
2318         cookie.msg = msg;
2319         cookie.idx = key_idx;
2320
2321         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2322             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2323                 goto nla_put_failure;
2324         if (mac_addr &&
2325             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2326                 goto nla_put_failure;
2327
2328         if (pairwise && mac_addr &&
2329             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2330                 return -ENOENT;
2331
2332         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2333                            get_key_callback);
2334
2335         if (err)
2336                 goto free_msg;
2337
2338         if (cookie.error)
2339                 goto nla_put_failure;
2340
2341         genlmsg_end(msg, hdr);
2342         return genlmsg_reply(msg, info);
2343
2344  nla_put_failure:
2345         err = -ENOBUFS;
2346  free_msg:
2347         nlmsg_free(msg);
2348         return err;
2349 }
2350
2351 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2352 {
2353         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2354         struct key_parse key;
2355         int err;
2356         struct net_device *dev = info->user_ptr[1];
2357
2358         err = nl80211_parse_key(info, &key);
2359         if (err)
2360                 return err;
2361
2362         if (key.idx < 0)
2363                 return -EINVAL;
2364
2365         /* only support setting default key */
2366         if (!key.def && !key.defmgmt)
2367                 return -EINVAL;
2368
2369         wdev_lock(dev->ieee80211_ptr);
2370
2371         if (key.def) {
2372                 if (!rdev->ops->set_default_key) {
2373                         err = -EOPNOTSUPP;
2374                         goto out;
2375                 }
2376
2377                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2378                 if (err)
2379                         goto out;
2380
2381                 err = rdev_set_default_key(rdev, dev, key.idx,
2382                                                  key.def_uni, key.def_multi);
2383
2384                 if (err)
2385                         goto out;
2386
2387 #ifdef CONFIG_CFG80211_WEXT
2388                 dev->ieee80211_ptr->wext.default_key = key.idx;
2389 #endif
2390         } else {
2391                 if (key.def_uni || !key.def_multi) {
2392                         err = -EINVAL;
2393                         goto out;
2394                 }
2395
2396                 if (!rdev->ops->set_default_mgmt_key) {
2397                         err = -EOPNOTSUPP;
2398                         goto out;
2399                 }
2400
2401                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2402                 if (err)
2403                         goto out;
2404
2405                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2406                 if (err)
2407                         goto out;
2408
2409 #ifdef CONFIG_CFG80211_WEXT
2410                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2411 #endif
2412         }
2413
2414  out:
2415         wdev_unlock(dev->ieee80211_ptr);
2416
2417         return err;
2418 }
2419
2420 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2421 {
2422         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2423         int err;
2424         struct net_device *dev = info->user_ptr[1];
2425         struct key_parse key;
2426         const u8 *mac_addr = NULL;
2427
2428         err = nl80211_parse_key(info, &key);
2429         if (err)
2430                 return err;
2431
2432         if (!key.p.key)
2433                 return -EINVAL;
2434
2435         if (info->attrs[NL80211_ATTR_MAC])
2436                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2437
2438         if (key.type == -1) {
2439                 if (mac_addr)
2440                         key.type = NL80211_KEYTYPE_PAIRWISE;
2441                 else
2442                         key.type = NL80211_KEYTYPE_GROUP;
2443         }
2444
2445         /* for now */
2446         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2447             key.type != NL80211_KEYTYPE_GROUP)
2448                 return -EINVAL;
2449
2450         if (!rdev->ops->add_key)
2451                 return -EOPNOTSUPP;
2452
2453         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2454                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2455                                            mac_addr))
2456                 return -EINVAL;
2457
2458         wdev_lock(dev->ieee80211_ptr);
2459         err = nl80211_key_allowed(dev->ieee80211_ptr);
2460         if (!err)
2461                 err = rdev_add_key(rdev, dev, key.idx,
2462                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2463                                     mac_addr, &key.p);
2464         wdev_unlock(dev->ieee80211_ptr);
2465
2466         return err;
2467 }
2468
2469 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2470 {
2471         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2472         int err;
2473         struct net_device *dev = info->user_ptr[1];
2474         u8 *mac_addr = NULL;
2475         struct key_parse key;
2476
2477         err = nl80211_parse_key(info, &key);
2478         if (err)
2479                 return err;
2480
2481         if (info->attrs[NL80211_ATTR_MAC])
2482                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2483
2484         if (key.type == -1) {
2485                 if (mac_addr)
2486                         key.type = NL80211_KEYTYPE_PAIRWISE;
2487                 else
2488                         key.type = NL80211_KEYTYPE_GROUP;
2489         }
2490
2491         /* for now */
2492         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2493             key.type != NL80211_KEYTYPE_GROUP)
2494                 return -EINVAL;
2495
2496         if (!rdev->ops->del_key)
2497                 return -EOPNOTSUPP;
2498
2499         wdev_lock(dev->ieee80211_ptr);
2500         err = nl80211_key_allowed(dev->ieee80211_ptr);
2501
2502         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2503             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2504                 err = -ENOENT;
2505
2506         if (!err)
2507                 err = rdev_del_key(rdev, dev, key.idx,
2508                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2509                                    mac_addr);
2510
2511 #ifdef CONFIG_CFG80211_WEXT
2512         if (!err) {
2513                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2514                         dev->ieee80211_ptr->wext.default_key = -1;
2515                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2516                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2517         }
2518 #endif
2519         wdev_unlock(dev->ieee80211_ptr);
2520
2521         return err;
2522 }
2523
2524 /* This function returns an error or the number of nested attributes */
2525 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2526 {
2527         struct nlattr *attr;
2528         int n_entries = 0, tmp;
2529
2530         nla_for_each_nested(attr, nl_attr, tmp) {
2531                 if (nla_len(attr) != ETH_ALEN)
2532                         return -EINVAL;
2533
2534                 n_entries++;
2535         }
2536
2537         return n_entries;
2538 }
2539
2540 /*
2541  * This function parses ACL information and allocates memory for ACL data.
2542  * On successful return, the calling function is responsible to free the
2543  * ACL buffer returned by this function.
2544  */
2545 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2546                                                 struct genl_info *info)
2547 {
2548         enum nl80211_acl_policy acl_policy;
2549         struct nlattr *attr;
2550         struct cfg80211_acl_data *acl;
2551         int i = 0, n_entries, tmp;
2552
2553         if (!wiphy->max_acl_mac_addrs)
2554                 return ERR_PTR(-EOPNOTSUPP);
2555
2556         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2557                 return ERR_PTR(-EINVAL);
2558
2559         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2560         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2561             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2562                 return ERR_PTR(-EINVAL);
2563
2564         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2565                 return ERR_PTR(-EINVAL);
2566
2567         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2568         if (n_entries < 0)
2569                 return ERR_PTR(n_entries);
2570
2571         if (n_entries > wiphy->max_acl_mac_addrs)
2572                 return ERR_PTR(-ENOTSUPP);
2573
2574         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2575                       GFP_KERNEL);
2576         if (!acl)
2577                 return ERR_PTR(-ENOMEM);
2578
2579         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2580                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2581                 i++;
2582         }
2583
2584         acl->n_acl_entries = n_entries;
2585         acl->acl_policy = acl_policy;
2586
2587         return acl;
2588 }
2589
2590 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2591 {
2592         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2593         struct net_device *dev = info->user_ptr[1];
2594         struct cfg80211_acl_data *acl;
2595         int err;
2596
2597         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2598             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2599                 return -EOPNOTSUPP;
2600
2601         if (!dev->ieee80211_ptr->beacon_interval)
2602                 return -EINVAL;
2603
2604         acl = parse_acl_data(&rdev->wiphy, info);
2605         if (IS_ERR(acl))
2606                 return PTR_ERR(acl);
2607
2608         err = rdev_set_mac_acl(rdev, dev, acl);
2609
2610         kfree(acl);
2611
2612         return err;
2613 }
2614
2615 static int nl80211_parse_beacon(struct genl_info *info,
2616                                 struct cfg80211_beacon_data *bcn)
2617 {
2618         bool haveinfo = false;
2619
2620         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2621             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2622             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2623             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2624                 return -EINVAL;
2625
2626         memset(bcn, 0, sizeof(*bcn));
2627
2628         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2629                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2630                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2631                 if (!bcn->head_len)
2632                         return -EINVAL;
2633                 haveinfo = true;
2634         }
2635
2636         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2637                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2638                 bcn->tail_len =
2639                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2640                 haveinfo = true;
2641         }
2642
2643         if (!haveinfo)
2644                 return -EINVAL;
2645
2646         if (info->attrs[NL80211_ATTR_IE]) {
2647                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2648                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2649         }
2650
2651         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2652                 bcn->proberesp_ies =
2653                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2654                 bcn->proberesp_ies_len =
2655                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2656         }
2657
2658         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2659                 bcn->assocresp_ies =
2660                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2661                 bcn->assocresp_ies_len =
2662                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2663         }
2664
2665         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2666                 bcn->probe_resp =
2667                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2668                 bcn->probe_resp_len =
2669                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2670         }
2671
2672         return 0;
2673 }
2674
2675 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2676                                    struct cfg80211_ap_settings *params)
2677 {
2678         struct wireless_dev *wdev;
2679         bool ret = false;
2680
2681         mutex_lock(&rdev->devlist_mtx);
2682
2683         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2684                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2685                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2686                         continue;
2687
2688                 if (!wdev->preset_chandef.chan)
2689                         continue;
2690
2691                 params->chandef = wdev->preset_chandef;
2692                 ret = true;
2693                 break;
2694         }
2695
2696         mutex_unlock(&rdev->devlist_mtx);
2697
2698         return ret;
2699 }
2700
2701 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2702                                     enum nl80211_auth_type auth_type,
2703                                     enum nl80211_commands cmd)
2704 {
2705         if (auth_type > NL80211_AUTHTYPE_MAX)
2706                 return false;
2707
2708         switch (cmd) {
2709         case NL80211_CMD_AUTHENTICATE:
2710                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2711                     auth_type == NL80211_AUTHTYPE_SAE)
2712                         return false;
2713                 return true;
2714         case NL80211_CMD_CONNECT:
2715         case NL80211_CMD_START_AP:
2716                 /* SAE not supported yet */
2717                 if (auth_type == NL80211_AUTHTYPE_SAE)
2718                         return false;
2719                 return true;
2720         default:
2721                 return false;
2722         }
2723 }
2724
2725 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2726 {
2727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2728         struct net_device *dev = info->user_ptr[1];
2729         struct wireless_dev *wdev = dev->ieee80211_ptr;
2730         struct cfg80211_ap_settings params;
2731         int err;
2732         u8 radar_detect_width = 0;
2733
2734         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2735             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2736                 return -EOPNOTSUPP;
2737
2738         if (!rdev->ops->start_ap)
2739                 return -EOPNOTSUPP;
2740
2741         if (wdev->beacon_interval)
2742                 return -EALREADY;
2743
2744         memset(&params, 0, sizeof(params));
2745
2746         /* these are required for START_AP */
2747         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2748             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2749             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2750                 return -EINVAL;
2751
2752         err = nl80211_parse_beacon(info, &params.beacon);
2753         if (err)
2754                 return err;
2755
2756         params.beacon_interval =
2757                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2758         params.dtim_period =
2759                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2760
2761         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2762         if (err)
2763                 return err;
2764
2765         /*
2766          * In theory, some of these attributes should be required here
2767          * but since they were not used when the command was originally
2768          * added, keep them optional for old user space programs to let
2769          * them continue to work with drivers that do not need the
2770          * additional information -- drivers must check!
2771          */
2772         if (info->attrs[NL80211_ATTR_SSID]) {
2773                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2774                 params.ssid_len =
2775                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2776                 if (params.ssid_len == 0 ||
2777                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2778                         return -EINVAL;
2779         }
2780
2781         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2782                 params.hidden_ssid = nla_get_u32(
2783                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2784                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2785                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2786                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2787                         return -EINVAL;
2788         }
2789
2790         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2791
2792         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2793                 params.auth_type = nla_get_u32(
2794                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2795                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2796                                              NL80211_CMD_START_AP))
2797                         return -EINVAL;
2798         } else
2799                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2800
2801         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2802                                       NL80211_MAX_NR_CIPHER_SUITES);
2803         if (err)
2804                 return err;
2805
2806         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2807                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2808                         return -EOPNOTSUPP;
2809                 params.inactivity_timeout = nla_get_u16(
2810                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2811         }
2812
2813         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
2814                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2815                         return -EINVAL;
2816                 params.p2p_ctwindow =
2817                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
2818                 if (params.p2p_ctwindow > 127)
2819                         return -EINVAL;
2820                 if (params.p2p_ctwindow != 0 &&
2821                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
2822                         return -EINVAL;
2823         }
2824
2825         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
2826                 u8 tmp;
2827
2828                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2829                         return -EINVAL;
2830                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
2831                 if (tmp > 1)
2832                         return -EINVAL;
2833                 params.p2p_opp_ps = tmp;
2834                 if (params.p2p_opp_ps != 0 &&
2835                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
2836                         return -EINVAL;
2837         }
2838
2839         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2840                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2841                 if (err)
2842                         return err;
2843         } else if (wdev->preset_chandef.chan) {
2844                 params.chandef = wdev->preset_chandef;
2845         } else if (!nl80211_get_ap_channel(rdev, &params))
2846                 return -EINVAL;
2847
2848         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2849                 return -EINVAL;
2850
2851         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
2852         if (err < 0)
2853                 return err;
2854         if (err) {
2855                 radar_detect_width = BIT(params.chandef.width);
2856                 params.radar_required = true;
2857         }
2858
2859         mutex_lock(&rdev->devlist_mtx);
2860         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
2861                                            params.chandef.chan,
2862                                            CHAN_MODE_SHARED,
2863                                            radar_detect_width);
2864         mutex_unlock(&rdev->devlist_mtx);
2865
2866         if (err)
2867                 return err;
2868
2869         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
2870                 params.acl = parse_acl_data(&rdev->wiphy, info);
2871                 if (IS_ERR(params.acl))
2872                         return PTR_ERR(params.acl);
2873         }
2874
2875         err = rdev_start_ap(rdev, dev, &params);
2876         if (!err) {
2877                 wdev->preset_chandef = params.chandef;
2878                 wdev->beacon_interval = params.beacon_interval;
2879                 wdev->channel = params.chandef.chan;
2880                 wdev->ssid_len = params.ssid_len;
2881                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2882         }
2883
2884         kfree(params.acl);
2885
2886         return err;
2887 }
2888
2889 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2890 {
2891         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2892         struct net_device *dev = info->user_ptr[1];
2893         struct wireless_dev *wdev = dev->ieee80211_ptr;
2894         struct cfg80211_beacon_data params;
2895         int err;
2896
2897         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2898             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2899                 return -EOPNOTSUPP;
2900
2901         if (!rdev->ops->change_beacon)
2902                 return -EOPNOTSUPP;
2903
2904         if (!wdev->beacon_interval)
2905                 return -EINVAL;
2906
2907         err = nl80211_parse_beacon(info, &params);
2908         if (err)
2909                 return err;
2910
2911         return rdev_change_beacon(rdev, dev, &params);
2912 }
2913
2914 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2915 {
2916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2917         struct net_device *dev = info->user_ptr[1];
2918
2919         return cfg80211_stop_ap(rdev, dev);
2920 }
2921
2922 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2923         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2924         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2925         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2926         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2927         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2928         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2929 };
2930
2931 static int parse_station_flags(struct genl_info *info,
2932                                enum nl80211_iftype iftype,
2933                                struct station_parameters *params)
2934 {
2935         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2936         struct nlattr *nla;
2937         int flag;
2938
2939         /*
2940          * Try parsing the new attribute first so userspace
2941          * can specify both for older kernels.
2942          */
2943         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2944         if (nla) {
2945                 struct nl80211_sta_flag_update *sta_flags;
2946
2947                 sta_flags = nla_data(nla);
2948                 params->sta_flags_mask = sta_flags->mask;
2949                 params->sta_flags_set = sta_flags->set;
2950                 if ((params->sta_flags_mask |
2951                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2952                         return -EINVAL;
2953                 return 0;
2954         }
2955
2956         /* if present, parse the old attribute */
2957
2958         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2959         if (!nla)
2960                 return 0;
2961
2962         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2963                              nla, sta_flags_policy))
2964                 return -EINVAL;
2965
2966         /*
2967          * Only allow certain flags for interface types so that
2968          * other attributes are silently ignored. Remember that
2969          * this is backward compatibility code with old userspace
2970          * and shouldn't be hit in other cases anyway.
2971          */
2972         switch (iftype) {
2973         case NL80211_IFTYPE_AP:
2974         case NL80211_IFTYPE_AP_VLAN:
2975         case NL80211_IFTYPE_P2P_GO:
2976                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2977                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2978                                          BIT(NL80211_STA_FLAG_WME) |
2979                                          BIT(NL80211_STA_FLAG_MFP);
2980                 break;
2981         case NL80211_IFTYPE_P2P_CLIENT:
2982         case NL80211_IFTYPE_STATION:
2983                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2984                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2985                 break;
2986         case NL80211_IFTYPE_MESH_POINT:
2987                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2988                                          BIT(NL80211_STA_FLAG_MFP) |
2989                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2990         default:
2991                 return -EINVAL;
2992         }
2993
2994         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2995                 if (flags[flag]) {
2996                         params->sta_flags_set |= (1<<flag);
2997
2998                         /* no longer support new API additions in old API */
2999                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3000                                 return -EINVAL;
3001                 }
3002         }
3003
3004         return 0;
3005 }
3006
3007 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3008                                  int attr)
3009 {
3010         struct nlattr *rate;
3011         u32 bitrate;
3012         u16 bitrate_compat;
3013
3014         rate = nla_nest_start(msg, attr);
3015         if (!rate)
3016                 return false;
3017
3018         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3019         bitrate = cfg80211_calculate_bitrate(info);
3020         /* report 16-bit bitrate only if we can */
3021         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3022         if (bitrate > 0 &&
3023             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3024                 return false;
3025         if (bitrate_compat > 0 &&
3026             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3027                 return false;
3028
3029         if (info->flags & RATE_INFO_FLAGS_MCS) {
3030                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3031                         return false;
3032                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3033                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3034                         return false;
3035                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3036                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3037                         return false;
3038         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3039                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3040                         return false;
3041                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3042                         return false;
3043                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3044                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3045                         return false;
3046                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3047                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3048                         return false;
3049                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3050                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3051                         return false;
3052                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3053                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3054                         return false;
3055                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3056                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3057                         return false;
3058         }
3059
3060         nla_nest_end(msg, rate);
3061         return true;
3062 }
3063
3064 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3065                                 int flags,
3066                                 struct cfg80211_registered_device *rdev,
3067                                 struct net_device *dev,
3068                                 const u8 *mac_addr, struct station_info *sinfo)
3069 {
3070         void *hdr;
3071         struct nlattr *sinfoattr, *bss_param;
3072
3073         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3074         if (!hdr)
3075                 return -1;
3076
3077         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3078             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3079             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3080                 goto nla_put_failure;
3081
3082         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3083         if (!sinfoattr)
3084                 goto nla_put_failure;
3085         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3086             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3087                         sinfo->connected_time))
3088                 goto nla_put_failure;
3089         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3090             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3091                         sinfo->inactive_time))
3092                 goto nla_put_failure;
3093         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3094                               STATION_INFO_RX_BYTES64)) &&
3095             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3096                         (u32)sinfo->rx_bytes))
3097                 goto nla_put_failure;
3098         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3099                               NL80211_STA_INFO_TX_BYTES64)) &&
3100             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3101                         (u32)sinfo->tx_bytes))
3102                 goto nla_put_failure;
3103         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3104             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3105                         sinfo->rx_bytes))
3106                 goto nla_put_failure;
3107         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3108             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3109                         sinfo->tx_bytes))
3110                 goto nla_put_failure;
3111         if ((sinfo->filled & STATION_INFO_LLID) &&
3112             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3113                 goto nla_put_failure;
3114         if ((sinfo->filled & STATION_INFO_PLID) &&
3115             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3116                 goto nla_put_failure;
3117         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3118             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3119                        sinfo->plink_state))
3120                 goto nla_put_failure;
3121         switch (rdev->wiphy.signal_type) {
3122         case CFG80211_SIGNAL_TYPE_MBM:
3123                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3124                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3125                                sinfo->signal))
3126                         goto nla_put_failure;
3127                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3128                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3129                                sinfo->signal_avg))
3130                         goto nla_put_failure;
3131                 break;
3132         default:
3133                 break;
3134         }
3135         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3136                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3137                                           NL80211_STA_INFO_TX_BITRATE))
3138                         goto nla_put_failure;
3139         }
3140         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3141                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3142                                           NL80211_STA_INFO_RX_BITRATE))
3143                         goto nla_put_failure;
3144         }
3145         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3146             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3147                         sinfo->rx_packets))
3148                 goto nla_put_failure;
3149         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3150             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3151                         sinfo->tx_packets))
3152                 goto nla_put_failure;
3153         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3154             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3155                         sinfo->tx_retries))
3156                 goto nla_put_failure;
3157         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3158             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3159                         sinfo->tx_failed))
3160                 goto nla_put_failure;
3161         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3162             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3163                         sinfo->beacon_loss_count))
3164                 goto nla_put_failure;
3165         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3166             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3167                         sinfo->local_pm))
3168                 goto nla_put_failure;
3169         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3170             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3171                         sinfo->peer_pm))
3172                 goto nla_put_failure;
3173         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3174             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3175                         sinfo->nonpeer_pm))
3176                 goto nla_put_failure;
3177         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3178                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3179                 if (!bss_param)
3180                         goto nla_put_failure;
3181
3182                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3183                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3184                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3185                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3186                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3187                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3188                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3189                                sinfo->bss_param.dtim_period) ||
3190                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3191                                 sinfo->bss_param.beacon_interval))
3192                         goto nla_put_failure;
3193
3194                 nla_nest_end(msg, bss_param);
3195         }
3196         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3197             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3198                     sizeof(struct nl80211_sta_flag_update),
3199                     &sinfo->sta_flags))
3200                 goto nla_put_failure;
3201         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3202                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3203                             sinfo->t_offset))
3204                 goto nla_put_failure;
3205         nla_nest_end(msg, sinfoattr);
3206
3207         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3208             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3209                     sinfo->assoc_req_ies))
3210                 goto nla_put_failure;
3211
3212         return genlmsg_end(msg, hdr);
3213
3214  nla_put_failure:
3215         genlmsg_cancel(msg, hdr);
3216         return -EMSGSIZE;
3217 }
3218
3219 static int nl80211_dump_station(struct sk_buff *skb,
3220                                 struct netlink_callback *cb)
3221 {
3222         struct station_info sinfo;
3223         struct cfg80211_registered_device *dev;
3224         struct net_device *netdev;
3225         u8 mac_addr[ETH_ALEN];
3226         int sta_idx = cb->args[1];
3227         int err;
3228
3229         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3230         if (err)
3231                 return err;
3232
3233         if (!dev->ops->dump_station) {
3234                 err = -EOPNOTSUPP;
3235                 goto out_err;
3236         }
3237
3238         while (1) {
3239                 memset(&sinfo, 0, sizeof(sinfo));
3240                 err = rdev_dump_station(dev, netdev, sta_idx,
3241                                         mac_addr, &sinfo);
3242                 if (err == -ENOENT)
3243                         break;
3244                 if (err)
3245                         goto out_err;
3246
3247                 if (nl80211_send_station(skb,
3248                                 NETLINK_CB(cb->skb).portid,
3249                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3250                                 dev, netdev, mac_addr,
3251                                 &sinfo) < 0)
3252                         goto out;
3253
3254                 sta_idx++;
3255         }
3256
3257
3258  out:
3259         cb->args[1] = sta_idx;
3260         err = skb->len;
3261  out_err:
3262         nl80211_finish_netdev_dump(dev);
3263
3264         return err;
3265 }
3266
3267 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3268 {
3269         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3270         struct net_device *dev = info->user_ptr[1];
3271         struct station_info sinfo;
3272         struct sk_buff *msg;
3273         u8 *mac_addr = NULL;
3274         int err;
3275
3276         memset(&sinfo, 0, sizeof(sinfo));
3277
3278         if (!info->attrs[NL80211_ATTR_MAC])
3279                 return -EINVAL;
3280
3281         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3282
3283         if (!rdev->ops->get_station)
3284                 return -EOPNOTSUPP;
3285
3286         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3287         if (err)
3288                 return err;
3289
3290         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3291         if (!msg)
3292                 return -ENOMEM;
3293
3294         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3295                                  rdev, dev, mac_addr, &sinfo) < 0) {
3296                 nlmsg_free(msg);
3297                 return -ENOBUFS;
3298         }
3299
3300         return genlmsg_reply(msg, info);
3301 }
3302
3303 /*
3304  * Get vlan interface making sure it is running and on the right wiphy.
3305  */
3306 static struct net_device *get_vlan(struct genl_info *info,
3307                                    struct cfg80211_registered_device *rdev)
3308 {
3309         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3310         struct net_device *v;
3311         int ret;
3312
3313         if (!vlanattr)
3314                 return NULL;
3315
3316         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3317         if (!v)
3318                 return ERR_PTR(-ENODEV);
3319
3320         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3321                 ret = -EINVAL;
3322                 goto error;
3323         }
3324
3325         if (!netif_running(v)) {
3326                 ret = -ENETDOWN;
3327                 goto error;
3328         }
3329
3330         return v;
3331  error:
3332         dev_put(v);
3333         return ERR_PTR(ret);
3334 }
3335
3336 static struct nla_policy
3337 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3338         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3339         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3340 };
3341
3342 static int nl80211_set_station_tdls(struct genl_info *info,
3343                                     struct station_parameters *params)
3344 {
3345         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3346         struct nlattr *nla;
3347         int err;
3348
3349         /* Dummy STA entry gets updated once the peer capabilities are known */
3350         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3351                 params->ht_capa =
3352                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3353         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3354                 params->vht_capa =
3355                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3356
3357         /* parse WME attributes if present */
3358         if (!info->attrs[NL80211_ATTR_STA_WME])
3359                 return 0;
3360
3361         nla = info->attrs[NL80211_ATTR_STA_WME];
3362         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3363                                nl80211_sta_wme_policy);
3364         if (err)
3365                 return err;
3366
3367         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3368                 params->uapsd_queues = nla_get_u8(
3369                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3370         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3371                 return -EINVAL;
3372
3373         if (tb[NL80211_STA_WME_MAX_SP])
3374                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3375
3376         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3377                 return -EINVAL;
3378
3379         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3380
3381         return 0;
3382 }
3383
3384 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3385 {
3386         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3387         int err;
3388         struct net_device *dev = info->user_ptr[1];
3389         struct station_parameters params;
3390         u8 *mac_addr = NULL;
3391
3392         memset(&params, 0, sizeof(params));
3393
3394         params.listen_interval = -1;
3395         params.plink_state = -1;
3396
3397         if (info->attrs[NL80211_ATTR_STA_AID])
3398                 return -EINVAL;
3399
3400         if (!info->attrs[NL80211_ATTR_MAC])
3401                 return -EINVAL;
3402
3403         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3404
3405         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3406                 params.supported_rates =
3407                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3408                 params.supported_rates_len =
3409                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3410         }
3411
3412         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3413                 params.capability =
3414                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3415                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3416         }
3417
3418         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3419                 params.ext_capab =
3420                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3421                 params.ext_capab_len =
3422                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3423         }
3424
3425         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3426                 return -EINVAL;
3427
3428         if (!rdev->ops->change_station)
3429                 return -EOPNOTSUPP;
3430
3431         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3432                 return -EINVAL;
3433
3434         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3435                 params.plink_action =
3436                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3437
3438         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3439                 params.plink_state =
3440                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3441
3442         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3443                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3444                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3445
3446                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3447                     pm > NL80211_MESH_POWER_MAX)
3448                         return -EINVAL;
3449
3450                 params.local_pm = pm;
3451         }
3452
3453         switch (dev->ieee80211_ptr->iftype) {
3454         case NL80211_IFTYPE_AP:
3455         case NL80211_IFTYPE_AP_VLAN:
3456         case NL80211_IFTYPE_P2P_GO:
3457                 /* disallow mesh-specific things */
3458                 if (params.plink_action)
3459                         return -EINVAL;
3460                 if (params.local_pm)
3461                         return -EINVAL;
3462
3463                 /* TDLS can't be set, ... */
3464                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3465                         return -EINVAL;
3466                 /*
3467                  * ... but don't bother the driver with it. This works around
3468                  * a hostapd/wpa_supplicant issue -- it always includes the
3469                  * TLDS_PEER flag in the mask even for AP mode.
3470                  */
3471                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3472
3473                 /* accept only the listed bits */
3474                 if (params.sta_flags_mask &
3475                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3476                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3477                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3478                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3479                                   BIT(NL80211_STA_FLAG_WME) |
3480                                   BIT(NL80211_STA_FLAG_MFP)))
3481                         return -EINVAL;
3482
3483                 /* but authenticated/associated only if driver handles it */
3484                 if (!(rdev->wiphy.features &
3485                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3486                     params.sta_flags_mask &
3487                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3488                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3489                         return -EINVAL;
3490
3491                 /* reject other things that can't change */
3492                 if (params.supported_rates)
3493                         return -EINVAL;
3494                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3495                         return -EINVAL;
3496                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3497                         return -EINVAL;
3498                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3499                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3500                         return -EINVAL;
3501
3502                 /* must be last in here for error handling */
3503                 params.vlan = get_vlan(info, rdev);
3504                 if (IS_ERR(params.vlan))
3505                         return PTR_ERR(params.vlan);
3506                 break;
3507         case NL80211_IFTYPE_P2P_CLIENT:
3508         case NL80211_IFTYPE_STATION:
3509                 /*
3510                  * Don't allow userspace to change the TDLS_PEER flag,
3511                  * but silently ignore attempts to change it since we
3512                  * don't have state here to verify that it doesn't try
3513                  * to change the flag.
3514                  */
3515                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3516                 /* Include parameters for TDLS peer (driver will check) */
3517                 err = nl80211_set_station_tdls(info, &params);
3518                 if (err)
3519                         return err;
3520                 /* disallow things sta doesn't support */
3521                 if (params.plink_action)
3522                         return -EINVAL;
3523                 if (params.local_pm)
3524                         return -EINVAL;
3525                 /* reject any changes other than AUTHORIZED or WME (for TDLS) */
3526                 if (params.sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3527                                               BIT(NL80211_STA_FLAG_WME)))
3528                         return -EINVAL;
3529                 break;
3530         case NL80211_IFTYPE_ADHOC:
3531                 /* disallow things sta doesn't support */
3532                 if (params.plink_action)
3533                         return -EINVAL;
3534                 if (params.local_pm)
3535                         return -EINVAL;
3536                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3537                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3538                         return -EINVAL;
3539                 /* reject any changes other than AUTHORIZED */
3540                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3541                         return -EINVAL;
3542                 break;
3543         case NL80211_IFTYPE_MESH_POINT:
3544                 /* disallow things mesh doesn't support */
3545                 if (params.vlan)
3546                         return -EINVAL;
3547                 if (params.supported_rates)
3548                         return -EINVAL;
3549                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3550                         return -EINVAL;
3551                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3552                         return -EINVAL;
3553                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3554                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3555                         return -EINVAL;
3556                 /*
3557                  * No special handling for TDLS here -- the userspace
3558                  * mesh code doesn't have this bug.
3559                  */
3560                 if (params.sta_flags_mask &
3561                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3562                                   BIT(NL80211_STA_FLAG_MFP) |
3563                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3564                         return -EINVAL;
3565                 break;
3566         default:
3567                 return -EOPNOTSUPP;
3568         }
3569
3570         /* be aware of params.vlan when changing code here */
3571
3572         err = rdev_change_station(rdev, dev, mac_addr, &params);
3573
3574         if (params.vlan)
3575                 dev_put(params.vlan);
3576
3577         return err;
3578 }
3579
3580 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3581 {
3582         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3583         int err;
3584         struct net_device *dev = info->user_ptr[1];
3585         struct station_parameters params;
3586         u8 *mac_addr = NULL;
3587
3588         memset(&params, 0, sizeof(params));
3589
3590         if (!info->attrs[NL80211_ATTR_MAC])
3591                 return -EINVAL;
3592
3593         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3594                 return -EINVAL;
3595
3596         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3597                 return -EINVAL;
3598
3599         if (!info->attrs[NL80211_ATTR_STA_AID])
3600                 return -EINVAL;
3601
3602         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3603         params.supported_rates =
3604                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3605         params.supported_rates_len =
3606                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3607         params.listen_interval =
3608                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3609
3610         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3611         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3612                 return -EINVAL;
3613
3614         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3615                 params.capability =
3616                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3617                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3618         }
3619
3620         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3621                 params.ext_capab =
3622                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3623                 params.ext_capab_len =
3624                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3625         }
3626
3627         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3628                 params.ht_capa =
3629                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3630
3631         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3632                 params.vht_capa =
3633                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3634
3635         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3636                 params.plink_action =
3637                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3638
3639         if (!rdev->ops->add_station)
3640                 return -EOPNOTSUPP;
3641
3642         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3643                 return -EINVAL;
3644
3645         switch (dev->ieee80211_ptr->iftype) {
3646         case NL80211_IFTYPE_AP:
3647         case NL80211_IFTYPE_AP_VLAN:
3648         case NL80211_IFTYPE_P2P_GO:
3649                 /* parse WME attributes if sta is WME capable */
3650                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3651                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3652                     info->attrs[NL80211_ATTR_STA_WME]) {
3653                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3654                         struct nlattr *nla;
3655
3656                         nla = info->attrs[NL80211_ATTR_STA_WME];
3657                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3658                                                nl80211_sta_wme_policy);
3659                         if (err)
3660                                 return err;
3661
3662                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3663                                 params.uapsd_queues =
3664                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3665                         if (params.uapsd_queues &
3666                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3667                                 return -EINVAL;
3668
3669                         if (tb[NL80211_STA_WME_MAX_SP])
3670                                 params.max_sp =
3671                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3672
3673                         if (params.max_sp &
3674                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3675                                 return -EINVAL;
3676
3677                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3678                 }
3679                 /* TDLS peers cannot be added */
3680                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3681                         return -EINVAL;
3682                 /* but don't bother the driver with it */
3683                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3684
3685                 /* allow authenticated/associated only if driver handles it */
3686                 if (!(rdev->wiphy.features &
3687                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3688                     params.sta_flags_mask &
3689                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3690                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3691                         return -EINVAL;
3692
3693                 /* must be last in here for error handling */
3694                 params.vlan = get_vlan(info, rdev);
3695                 if (IS_ERR(params.vlan))
3696                         return PTR_ERR(params.vlan);
3697                 break;
3698         case NL80211_IFTYPE_MESH_POINT:
3699                 /* associated is disallowed */
3700                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3701                         return -EINVAL;
3702                 /* TDLS peers cannot be added */
3703                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3704                         return -EINVAL;
3705                 break;
3706         case NL80211_IFTYPE_STATION:
3707                 /* associated is disallowed */
3708                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3709                         return -EINVAL;
3710                 /* Only TDLS peers can be added */
3711                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3712                         return -EINVAL;
3713                 /* Can only add if TDLS ... */
3714                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3715                         return -EOPNOTSUPP;
3716                 /* ... with external setup is supported */
3717                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3718                         return -EOPNOTSUPP;
3719                 break;
3720         default:
3721                 return -EOPNOTSUPP;
3722         }
3723
3724         /* be aware of params.vlan when changing code here */
3725
3726         err = rdev_add_station(rdev, dev, mac_addr, &params);
3727
3728         if (params.vlan)
3729                 dev_put(params.vlan);
3730         return err;
3731 }
3732
3733 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3734 {
3735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3736         struct net_device *dev = info->user_ptr[1];
3737         u8 *mac_addr = NULL;
3738
3739         if (info->attrs[NL80211_ATTR_MAC])
3740                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3741
3742         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3743             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3744             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3745             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3746                 return -EINVAL;
3747
3748         if (!rdev->ops->del_station)
3749                 return -EOPNOTSUPP;
3750
3751         return rdev_del_station(rdev, dev, mac_addr);
3752 }
3753
3754 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3755                                 int flags, struct net_device *dev,
3756                                 u8 *dst, u8 *next_hop,
3757                                 struct mpath_info *pinfo)
3758 {
3759         void *hdr;
3760         struct nlattr *pinfoattr;
3761
3762         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3763         if (!hdr)
3764                 return -1;
3765
3766         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3767             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3768             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3769             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3770                 goto nla_put_failure;
3771
3772         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3773         if (!pinfoattr)
3774                 goto nla_put_failure;
3775         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3776             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3777                         pinfo->frame_qlen))
3778                 goto nla_put_failure;
3779         if (((pinfo->filled & MPATH_INFO_SN) &&
3780              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3781             ((pinfo->filled & MPATH_INFO_METRIC) &&
3782              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3783                          pinfo->metric)) ||
3784             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3785              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3786                          pinfo->exptime)) ||
3787             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3788              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3789                         pinfo->flags)) ||
3790             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3791              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3792                          pinfo->discovery_timeout)) ||
3793             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3794              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3795                         pinfo->discovery_retries)))
3796                 goto nla_put_failure;
3797
3798         nla_nest_end(msg, pinfoattr);
3799
3800         return genlmsg_end(msg, hdr);
3801
3802  nla_put_failure:
3803         genlmsg_cancel(msg, hdr);
3804         return -EMSGSIZE;
3805 }
3806
3807 static int nl80211_dump_mpath(struct sk_buff *skb,
3808                               struct netlink_callback *cb)
3809 {
3810         struct mpath_info pinfo;
3811         struct cfg80211_registered_device *dev;
3812         struct net_device *netdev;
3813         u8 dst[ETH_ALEN];
3814         u8 next_hop[ETH_ALEN];
3815         int path_idx = cb->args[1];
3816         int err;
3817
3818         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3819         if (err)
3820                 return err;
3821
3822         if (!dev->ops->dump_mpath) {
3823                 err = -EOPNOTSUPP;
3824                 goto out_err;
3825         }
3826
3827         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3828                 err = -EOPNOTSUPP;
3829                 goto out_err;
3830         }
3831
3832         while (1) {
3833                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3834                                       &pinfo);
3835                 if (err == -ENOENT)
3836                         break;
3837                 if (err)
3838                         goto out_err;
3839
3840                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3841                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3842                                        netdev, dst, next_hop,
3843                                        &pinfo) < 0)
3844                         goto out;
3845
3846                 path_idx++;
3847         }
3848
3849
3850  out:
3851         cb->args[1] = path_idx;
3852         err = skb->len;
3853  out_err:
3854         nl80211_finish_netdev_dump(dev);
3855         return err;
3856 }
3857
3858 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3859 {
3860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3861         int err;
3862         struct net_device *dev = info->user_ptr[1];
3863         struct mpath_info pinfo;
3864         struct sk_buff *msg;
3865         u8 *dst = NULL;
3866         u8 next_hop[ETH_ALEN];
3867
3868         memset(&pinfo, 0, sizeof(pinfo));
3869
3870         if (!info->attrs[NL80211_ATTR_MAC])
3871                 return -EINVAL;
3872
3873         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3874
3875         if (!rdev->ops->get_mpath)
3876                 return -EOPNOTSUPP;
3877
3878         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3879                 return -EOPNOTSUPP;
3880
3881         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3882         if (err)
3883                 return err;
3884
3885         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3886         if (!msg)
3887                 return -ENOMEM;
3888
3889         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3890                                  dev, dst, next_hop, &pinfo) < 0) {
3891                 nlmsg_free(msg);
3892                 return -ENOBUFS;
3893         }
3894
3895         return genlmsg_reply(msg, info);
3896 }
3897
3898 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3899 {
3900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3901         struct net_device *dev = info->user_ptr[1];
3902         u8 *dst = NULL;
3903         u8 *next_hop = NULL;
3904
3905         if (!info->attrs[NL80211_ATTR_MAC])
3906                 return -EINVAL;
3907
3908         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3909                 return -EINVAL;
3910
3911         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3912         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3913
3914         if (!rdev->ops->change_mpath)
3915                 return -EOPNOTSUPP;
3916
3917         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3918                 return -EOPNOTSUPP;
3919
3920         return rdev_change_mpath(rdev, dev, dst, next_hop);
3921 }
3922
3923 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3924 {
3925         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3926         struct net_device *dev = info->user_ptr[1];
3927         u8 *dst = NULL;
3928         u8 *next_hop = NULL;
3929
3930         if (!info->attrs[NL80211_ATTR_MAC])
3931                 return -EINVAL;
3932
3933         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3934                 return -EINVAL;
3935
3936         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3937         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3938
3939         if (!rdev->ops->add_mpath)
3940                 return -EOPNOTSUPP;
3941
3942         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3943                 return -EOPNOTSUPP;
3944
3945         return rdev_add_mpath(rdev, dev, dst, next_hop);
3946 }
3947
3948 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3949 {
3950         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3951         struct net_device *dev = info->user_ptr[1];
3952         u8 *dst = NULL;
3953
3954         if (info->attrs[NL80211_ATTR_MAC])
3955                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3956
3957         if (!rdev->ops->del_mpath)
3958                 return -EOPNOTSUPP;
3959
3960         return rdev_del_mpath(rdev, dev, dst);
3961 }
3962
3963 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3964 {
3965         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3966         struct net_device *dev = info->user_ptr[1];
3967         struct bss_parameters params;
3968
3969         memset(&params, 0, sizeof(params));
3970         /* default to not changing parameters */
3971         params.use_cts_prot = -1;
3972         params.use_short_preamble = -1;
3973         params.use_short_slot_time = -1;
3974         params.ap_isolate = -1;
3975         params.ht_opmode = -1;
3976         params.p2p_ctwindow = -1;
3977         params.p2p_opp_ps = -1;
3978
3979         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3980                 params.use_cts_prot =
3981                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3982         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3983                 params.use_short_preamble =
3984                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3985         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3986                 params.use_short_slot_time =
3987                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3988         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3989                 params.basic_rates =
3990                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3991                 params.basic_rates_len =
3992                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3993         }
3994         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3995                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3996         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3997                 params.ht_opmode =
3998                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3999
4000         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4001                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4002                         return -EINVAL;
4003                 params.p2p_ctwindow =
4004                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4005                 if (params.p2p_ctwindow < 0)
4006                         return -EINVAL;
4007                 if (params.p2p_ctwindow != 0 &&
4008                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4009                         return -EINVAL;
4010         }
4011
4012         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4013                 u8 tmp;
4014
4015                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4016                         return -EINVAL;
4017                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4018                 if (tmp > 1)
4019                         return -EINVAL;
4020                 params.p2p_opp_ps = tmp;
4021                 if (params.p2p_opp_ps &&
4022                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4023                         return -EINVAL;
4024         }
4025
4026         if (!rdev->ops->change_bss)
4027                 return -EOPNOTSUPP;
4028
4029         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4030             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4031                 return -EOPNOTSUPP;
4032
4033         return rdev_change_bss(rdev, dev, &params);
4034 }
4035
4036 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4037         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4038         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4039         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4040         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4041         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4042         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4043 };
4044
4045 static int parse_reg_rule(struct nlattr *tb[],
4046         struct ieee80211_reg_rule *reg_rule)
4047 {
4048         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4049         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4050
4051         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4052                 return -EINVAL;
4053         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4054                 return -EINVAL;
4055         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4056                 return -EINVAL;
4057         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4058                 return -EINVAL;
4059         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4060                 return -EINVAL;
4061
4062         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4063
4064         freq_range->start_freq_khz =
4065                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4066         freq_range->end_freq_khz =
4067                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4068         freq_range->max_bandwidth_khz =
4069                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4070
4071         power_rule->max_eirp =
4072                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4073
4074         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4075                 power_rule->max_antenna_gain =
4076                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4077
4078         return 0;
4079 }
4080
4081 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4082 {
4083         int r;
4084         char *data = NULL;
4085         enum nl80211_user_reg_hint_type user_reg_hint_type;
4086
4087         /*
4088          * You should only get this when cfg80211 hasn't yet initialized
4089          * completely when built-in to the kernel right between the time
4090          * window between nl80211_init() and regulatory_init(), if that is
4091          * even possible.
4092          */
4093         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4094                 return -EINPROGRESS;
4095
4096         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4097                 return -EINVAL;
4098
4099         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4100
4101         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4102                 user_reg_hint_type =
4103                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4104         else
4105                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4106
4107         switch (user_reg_hint_type) {
4108         case NL80211_USER_REG_HINT_USER:
4109         case NL80211_USER_REG_HINT_CELL_BASE:
4110                 break;
4111         default:
4112                 return -EINVAL;
4113         }
4114
4115         r = regulatory_hint_user(data, user_reg_hint_type);
4116
4117         return r;
4118 }
4119
4120 static int nl80211_get_mesh_config(struct sk_buff *skb,
4121                                    struct genl_info *info)
4122 {
4123         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4124         struct net_device *dev = info->user_ptr[1];
4125         struct wireless_dev *wdev = dev->ieee80211_ptr;
4126         struct mesh_config cur_params;
4127         int err = 0;
4128         void *hdr;
4129         struct nlattr *pinfoattr;
4130         struct sk_buff *msg;
4131
4132         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4133                 return -EOPNOTSUPP;
4134
4135         if (!rdev->ops->get_mesh_config)
4136                 return -EOPNOTSUPP;
4137
4138         wdev_lock(wdev);
4139         /* If not connected, get default parameters */
4140         if (!wdev->mesh_id_len)
4141                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4142         else
4143                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4144         wdev_unlock(wdev);
4145
4146         if (err)
4147                 return err;
4148
4149         /* Draw up a netlink message to send back */
4150         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4151         if (!msg)
4152                 return -ENOMEM;
4153         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4154                              NL80211_CMD_GET_MESH_CONFIG);
4155         if (!hdr)
4156                 goto out;
4157         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4158         if (!pinfoattr)
4159                 goto nla_put_failure;
4160         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4161             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4162                         cur_params.dot11MeshRetryTimeout) ||
4163             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4164                         cur_params.dot11MeshConfirmTimeout) ||
4165             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4166                         cur_params.dot11MeshHoldingTimeout) ||
4167             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4168                         cur_params.dot11MeshMaxPeerLinks) ||
4169             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4170                        cur_params.dot11MeshMaxRetries) ||
4171             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4172                        cur_params.dot11MeshTTL) ||
4173             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4174                        cur_params.element_ttl) ||
4175             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4176                        cur_params.auto_open_plinks) ||
4177             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4178                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4179             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4180                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4181             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4182                         cur_params.path_refresh_time) ||
4183             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4184                         cur_params.min_discovery_timeout) ||
4185             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4186                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4187             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4188                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4189             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4190                         cur_params.dot11MeshHWMPperrMinInterval) ||
4191             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4192                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4193             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4194                        cur_params.dot11MeshHWMPRootMode) ||
4195             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4196                         cur_params.dot11MeshHWMPRannInterval) ||
4197             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4198                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4199             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4200                        cur_params.dot11MeshForwarding) ||
4201             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4202                         cur_params.rssi_threshold) ||
4203             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4204                         cur_params.ht_opmode) ||
4205             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4206                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4207             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4208                         cur_params.dot11MeshHWMProotInterval) ||
4209             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4210                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4211             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4212                         cur_params.power_mode) ||
4213             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4214                         cur_params.dot11MeshAwakeWindowDuration))
4215                 goto nla_put_failure;
4216         nla_nest_end(msg, pinfoattr);
4217         genlmsg_end(msg, hdr);
4218         return genlmsg_reply(msg, info);
4219
4220  nla_put_failure:
4221         genlmsg_cancel(msg, hdr);
4222  out:
4223         nlmsg_free(msg);
4224         return -ENOBUFS;
4225 }
4226
4227 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4228         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4229         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4230         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4231         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4232         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4233         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4234         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4235         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4236         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4237         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4238         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4239         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4240         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4241         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4242         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4243         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4244         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4245         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4246         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4247         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4248         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4249         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4250         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4251         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4252         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4253         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4254         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4255 };
4256
4257 static const struct nla_policy
4258         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4259         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4260         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4261         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4262         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4263         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4264                                     .len = IEEE80211_MAX_DATA_LEN },
4265         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4266 };
4267
4268 static int nl80211_parse_mesh_config(struct genl_info *info,
4269                                      struct mesh_config *cfg,
4270                                      u32 *mask_out)
4271 {
4272         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4273         u32 mask = 0;
4274
4275 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4276 do {                                                                        \
4277         if (tb[attr]) {                                                     \
4278                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4279                         return -EINVAL;                                     \
4280                 cfg->param = fn(tb[attr]);                                  \
4281                 mask |= (1 << (attr - 1));                                  \
4282         }                                                                   \
4283 } while (0)
4284
4285
4286         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4287                 return -EINVAL;
4288         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4289                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4290                              nl80211_meshconf_params_policy))
4291                 return -EINVAL;
4292
4293         /* This makes sure that there aren't more than 32 mesh config
4294          * parameters (otherwise our bitfield scheme would not work.) */
4295         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4296
4297         /* Fill in the params struct */
4298         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4299                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4300                                   nla_get_u16);
4301         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4302                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4303                                   nla_get_u16);
4304         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4305                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4306                                   nla_get_u16);
4307         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4308                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4309                                   nla_get_u16);
4310         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4311                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4312                                   nla_get_u8);
4313         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4314                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4315         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4316                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4317                                   nla_get_u8);
4318         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4319                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4320                                   nla_get_u8);
4321         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4322                                   1, 255, mask,
4323                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4324                                   nla_get_u32);
4325         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4326                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4327                                   nla_get_u8);
4328         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4329                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4330                                   nla_get_u32);
4331         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4332                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4333                                   nla_get_u16);
4334         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4335                                   1, 65535, mask,
4336                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4337                                   nla_get_u32);
4338         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4339                                   1, 65535, mask,
4340                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4341                                   nla_get_u16);
4342         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4343                                   1, 65535, mask,
4344                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4345                                   nla_get_u16);
4346         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4347                                   dot11MeshHWMPnetDiameterTraversalTime,
4348                                   1, 65535, mask,
4349                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4350                                   nla_get_u16);
4351         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4352                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4353                                   nla_get_u8);
4354         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4355                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4356                                   nla_get_u16);
4357         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4358                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4359                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4360                                   nla_get_u8);
4361         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4362                                   mask, NL80211_MESHCONF_FORWARDING,
4363                                   nla_get_u8);
4364         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4365                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4366                                   nla_get_u32);
4367         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4368                                   mask, NL80211_MESHCONF_HT_OPMODE,
4369                                   nla_get_u16);
4370         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4371                                   1, 65535, mask,
4372                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4373                                   nla_get_u32);
4374         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4375                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4376                                   nla_get_u16);
4377         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4378                                   dot11MeshHWMPconfirmationInterval,
4379                                   1, 65535, mask,
4380                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4381                                   nla_get_u16);
4382         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4383                                   NL80211_MESH_POWER_ACTIVE,
4384                                   NL80211_MESH_POWER_MAX,
4385                                   mask, NL80211_MESHCONF_POWER_MODE,
4386                                   nla_get_u32);
4387         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4388                                   0, 65535, mask,
4389                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4390         if (mask_out)
4391                 *mask_out = mask;
4392
4393         return 0;
4394
4395 #undef FILL_IN_MESH_PARAM_IF_SET
4396 }
4397
4398 static int nl80211_parse_mesh_setup(struct genl_info *info,
4399                                      struct mesh_setup *setup)
4400 {
4401         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4402
4403         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4404                 return -EINVAL;
4405         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4406                              info->attrs[NL80211_ATTR_MESH_SETUP],
4407                              nl80211_mesh_setup_params_policy))
4408                 return -EINVAL;
4409
4410         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4411                 setup->sync_method =
4412                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4413                  IEEE80211_SYNC_METHOD_VENDOR :
4414                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4415
4416         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4417                 setup->path_sel_proto =
4418                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4419                  IEEE80211_PATH_PROTOCOL_VENDOR :
4420                  IEEE80211_PATH_PROTOCOL_HWMP;
4421
4422         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4423                 setup->path_metric =
4424                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4425                  IEEE80211_PATH_METRIC_VENDOR :
4426                  IEEE80211_PATH_METRIC_AIRTIME;
4427
4428
4429         if (tb[NL80211_MESH_SETUP_IE]) {
4430                 struct nlattr *ieattr =
4431                         tb[NL80211_MESH_SETUP_IE];
4432                 if (!is_valid_ie_attr(ieattr))
4433                         return -EINVAL;
4434                 setup->ie = nla_data(ieattr);
4435                 setup->ie_len = nla_len(ieattr);
4436         }
4437         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4438         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4439
4440         return 0;
4441 }
4442
4443 static int nl80211_update_mesh_config(struct sk_buff *skb,
4444                                       struct genl_info *info)
4445 {
4446         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4447         struct net_device *dev = info->user_ptr[1];
4448         struct wireless_dev *wdev = dev->ieee80211_ptr;
4449         struct mesh_config cfg;
4450         u32 mask;
4451         int err;
4452
4453         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4454                 return -EOPNOTSUPP;
4455
4456         if (!rdev->ops->update_mesh_config)
4457                 return -EOPNOTSUPP;
4458
4459         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4460         if (err)
4461                 return err;
4462
4463         wdev_lock(wdev);
4464         if (!wdev->mesh_id_len)
4465                 err = -ENOLINK;
4466
4467         if (!err)
4468                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4469
4470         wdev_unlock(wdev);
4471
4472         return err;
4473 }
4474
4475 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4476 {
4477         const struct ieee80211_regdomain *regdom;
4478         struct sk_buff *msg;
4479         void *hdr = NULL;
4480         struct nlattr *nl_reg_rules;
4481         unsigned int i;
4482         int err = -EINVAL;
4483
4484         mutex_lock(&cfg80211_mutex);
4485
4486         if (!cfg80211_regdomain)
4487                 goto out;
4488
4489         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4490         if (!msg) {
4491                 err = -ENOBUFS;
4492                 goto out;
4493         }
4494
4495         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4496                              NL80211_CMD_GET_REG);
4497         if (!hdr)
4498                 goto put_failure;
4499
4500         if (reg_last_request_cell_base() &&
4501             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4502                         NL80211_USER_REG_HINT_CELL_BASE))
4503                 goto nla_put_failure;
4504
4505         rcu_read_lock();
4506         regdom = rcu_dereference(cfg80211_regdomain);
4507
4508         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4509             (regdom->dfs_region &&
4510              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4511                 goto nla_put_failure_rcu;
4512
4513         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4514         if (!nl_reg_rules)
4515                 goto nla_put_failure_rcu;
4516
4517         for (i = 0; i < regdom->n_reg_rules; i++) {
4518                 struct nlattr *nl_reg_rule;
4519                 const struct ieee80211_reg_rule *reg_rule;
4520                 const struct ieee80211_freq_range *freq_range;
4521                 const struct ieee80211_power_rule *power_rule;
4522
4523                 reg_rule = &regdom->reg_rules[i];
4524                 freq_range = &reg_rule->freq_range;
4525                 power_rule = &reg_rule->power_rule;
4526
4527                 nl_reg_rule = nla_nest_start(msg, i);
4528                 if (!nl_reg_rule)
4529                         goto nla_put_failure_rcu;
4530
4531                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4532                                 reg_rule->flags) ||
4533                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4534                                 freq_range->start_freq_khz) ||
4535                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4536                                 freq_range->end_freq_khz) ||
4537                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4538                                 freq_range->max_bandwidth_khz) ||
4539                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4540                                 power_rule->max_antenna_gain) ||
4541                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4542                                 power_rule->max_eirp))
4543                         goto nla_put_failure_rcu;
4544
4545                 nla_nest_end(msg, nl_reg_rule);
4546         }
4547         rcu_read_unlock();
4548
4549         nla_nest_end(msg, nl_reg_rules);
4550
4551         genlmsg_end(msg, hdr);
4552         err = genlmsg_reply(msg, info);
4553         goto out;
4554
4555 nla_put_failure_rcu:
4556         rcu_read_unlock();
4557 nla_put_failure:
4558         genlmsg_cancel(msg, hdr);
4559 put_failure:
4560         nlmsg_free(msg);
4561         err = -EMSGSIZE;
4562 out:
4563         mutex_unlock(&cfg80211_mutex);
4564         return err;
4565 }
4566
4567 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4568 {
4569         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4570         struct nlattr *nl_reg_rule;
4571         char *alpha2 = NULL;
4572         int rem_reg_rules = 0, r = 0;
4573         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4574         u8 dfs_region = 0;
4575         struct ieee80211_regdomain *rd = NULL;
4576
4577         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4578                 return -EINVAL;
4579
4580         if (!info->attrs[NL80211_ATTR_REG_RULES])
4581                 return -EINVAL;
4582
4583         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4584
4585         if (info->attrs[NL80211_ATTR_DFS_REGION])
4586                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4587
4588         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4589                             rem_reg_rules) {
4590                 num_rules++;
4591                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4592                         return -EINVAL;
4593         }
4594
4595         size_of_regd = sizeof(struct ieee80211_regdomain) +
4596                        num_rules * sizeof(struct ieee80211_reg_rule);
4597
4598         rd = kzalloc(size_of_regd, GFP_KERNEL);
4599         if (!rd)
4600                 return -ENOMEM;
4601
4602         rd->n_reg_rules = num_rules;
4603         rd->alpha2[0] = alpha2[0];
4604         rd->alpha2[1] = alpha2[1];
4605
4606         /*
4607          * Disable DFS master mode if the DFS region was
4608          * not supported or known on this kernel.
4609          */
4610         if (reg_supported_dfs_region(dfs_region))
4611                 rd->dfs_region = dfs_region;
4612
4613         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4614                             rem_reg_rules) {
4615                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4616                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4617                           reg_rule_policy);
4618                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4619                 if (r)
4620                         goto bad_reg;
4621
4622                 rule_idx++;
4623
4624                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4625                         r = -EINVAL;
4626                         goto bad_reg;
4627                 }
4628         }
4629
4630         mutex_lock(&cfg80211_mutex);
4631
4632         r = set_regdom(rd);
4633         /* set_regdom took ownership */
4634         rd = NULL;
4635         mutex_unlock(&cfg80211_mutex);
4636
4637  bad_reg:
4638         kfree(rd);
4639         return r;
4640 }
4641
4642 static int validate_scan_freqs(struct nlattr *freqs)
4643 {
4644         struct nlattr *attr1, *attr2;
4645         int n_channels = 0, tmp1, tmp2;
4646
4647         nla_for_each_nested(attr1, freqs, tmp1) {
4648                 n_channels++;
4649                 /*
4650                  * Some hardware has a limited channel list for
4651                  * scanning, and it is pretty much nonsensical
4652                  * to scan for a channel twice, so disallow that
4653                  * and don't require drivers to check that the
4654                  * channel list they get isn't longer than what
4655                  * they can scan, as long as they can scan all
4656                  * the channels they registered at once.
4657                  */
4658                 nla_for_each_nested(attr2, freqs, tmp2)
4659                         if (attr1 != attr2 &&
4660                             nla_get_u32(attr1) == nla_get_u32(attr2))
4661                                 return 0;
4662         }
4663
4664         return n_channels;
4665 }
4666
4667 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4668 {
4669         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4670         struct wireless_dev *wdev = info->user_ptr[1];
4671         struct cfg80211_scan_request *request;
4672         struct nlattr *attr;
4673         struct wiphy *wiphy;
4674         int err, tmp, n_ssids = 0, n_channels, i;
4675         size_t ie_len;
4676
4677         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4678                 return -EINVAL;
4679
4680         wiphy = &rdev->wiphy;
4681
4682         if (!rdev->ops->scan)
4683                 return -EOPNOTSUPP;
4684
4685         if (rdev->scan_req)
4686                 return -EBUSY;
4687
4688         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4689                 n_channels = validate_scan_freqs(
4690                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4691                 if (!n_channels)
4692                         return -EINVAL;
4693         } else {
4694                 enum ieee80211_band band;
4695                 n_channels = 0;
4696
4697                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4698                         if (wiphy->bands[band])
4699                                 n_channels += wiphy->bands[band]->n_channels;
4700         }
4701
4702         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4703                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4704                         n_ssids++;
4705
4706         if (n_ssids > wiphy->max_scan_ssids)
4707                 return -EINVAL;
4708
4709         if (info->attrs[NL80211_ATTR_IE])
4710                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4711         else
4712                 ie_len = 0;
4713
4714         if (ie_len > wiphy->max_scan_ie_len)
4715                 return -EINVAL;
4716
4717         request = kzalloc(sizeof(*request)
4718                         + sizeof(*request->ssids) * n_ssids
4719                         + sizeof(*request->channels) * n_channels
4720                         + ie_len, GFP_KERNEL);
4721         if (!request)
4722                 return -ENOMEM;
4723
4724         if (n_ssids)
4725                 request->ssids = (void *)&request->channels[n_channels];
4726         request->n_ssids = n_ssids;
4727         if (ie_len) {
4728                 if (request->ssids)
4729                         request->ie = (void *)(request->ssids + n_ssids);
4730                 else
4731                         request->ie = (void *)(request->channels + n_channels);
4732         }
4733
4734         i = 0;
4735         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4736                 /* user specified, bail out if channel not found */
4737                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4738                         struct ieee80211_channel *chan;
4739
4740                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4741
4742                         if (!chan) {
4743                                 err = -EINVAL;
4744                                 goto out_free;
4745                         }
4746
4747                         /* ignore disabled channels */
4748                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4749                                 continue;
4750
4751                         request->channels[i] = chan;
4752                         i++;
4753                 }
4754         } else {
4755                 enum ieee80211_band band;
4756
4757                 /* all channels */
4758                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4759                         int j;
4760                         if (!wiphy->bands[band])
4761                                 continue;
4762                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4763                                 struct ieee80211_channel *chan;
4764
4765                                 chan = &wiphy->bands[band]->channels[j];
4766
4767                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4768                                         continue;
4769
4770                                 request->channels[i] = chan;
4771                                 i++;
4772                         }
4773                 }
4774         }
4775
4776         if (!i) {
4777                 err = -EINVAL;
4778                 goto out_free;
4779         }
4780
4781         request->n_channels = i;
4782
4783         i = 0;
4784         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4785                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4786                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4787                                 err = -EINVAL;
4788                                 goto out_free;
4789                         }
4790                         request->ssids[i].ssid_len = nla_len(attr);
4791                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4792                         i++;
4793                 }
4794         }
4795
4796         if (info->attrs[NL80211_ATTR_IE]) {
4797                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4798                 memcpy((void *)request->ie,
4799                        nla_data(info->attrs[NL80211_ATTR_IE]),
4800                        request->ie_len);
4801         }
4802
4803         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4804                 if (wiphy->bands[i])
4805                         request->rates[i] =
4806                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4807
4808         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4809                 nla_for_each_nested(attr,
4810                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4811                                     tmp) {
4812                         enum ieee80211_band band = nla_type(attr);
4813
4814                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4815                                 err = -EINVAL;
4816                                 goto out_free;
4817                         }
4818                         err = ieee80211_get_ratemask(wiphy->bands[band],
4819                                                      nla_data(attr),
4820                                                      nla_len(attr),
4821                                                      &request->rates[band]);
4822                         if (err)
4823                                 goto out_free;
4824                 }
4825         }
4826
4827         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4828                 request->flags = nla_get_u32(
4829                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4830                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4831                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4832                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4833                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4834                         err = -EOPNOTSUPP;
4835                         goto out_free;
4836                 }
4837         }
4838
4839         request->no_cck =
4840                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4841
4842         request->wdev = wdev;
4843         request->wiphy = &rdev->wiphy;
4844         request->scan_start = jiffies;
4845
4846         rdev->scan_req = request;
4847         err = rdev_scan(rdev, request);
4848
4849         if (!err) {
4850                 nl80211_send_scan_start(rdev, wdev);
4851                 if (wdev->netdev)
4852                         dev_hold(wdev->netdev);
4853         } else {
4854  out_free:
4855                 rdev->scan_req = NULL;
4856                 kfree(request);
4857         }
4858
4859         return err;
4860 }
4861
4862 static int nl80211_start_sched_scan(struct sk_buff *skb,
4863                                     struct genl_info *info)
4864 {
4865         struct cfg80211_sched_scan_request *request;
4866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4867         struct net_device *dev = info->user_ptr[1];
4868         struct nlattr *attr;
4869         struct wiphy *wiphy;
4870         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4871         u32 interval;
4872         enum ieee80211_band band;
4873         size_t ie_len;
4874         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4875
4876         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4877             !rdev->ops->sched_scan_start)
4878                 return -EOPNOTSUPP;
4879
4880         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4881                 return -EINVAL;
4882
4883         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4884                 return -EINVAL;
4885
4886         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4887         if (interval == 0)
4888                 return -EINVAL;
4889
4890         wiphy = &rdev->wiphy;
4891
4892         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4893                 n_channels = validate_scan_freqs(
4894                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4895                 if (!n_channels)
4896                         return -EINVAL;
4897         } else {
4898                 n_channels = 0;
4899
4900                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4901                         if (wiphy->bands[band])
4902                                 n_channels += wiphy->bands[band]->n_channels;
4903         }
4904
4905         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4906                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4907                                     tmp)
4908                         n_ssids++;
4909
4910         if (n_ssids > wiphy->max_sched_scan_ssids)
4911                 return -EINVAL;
4912
4913         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4914                 nla_for_each_nested(attr,
4915                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4916                                     tmp)
4917                         n_match_sets++;
4918
4919         if (n_match_sets > wiphy->max_match_sets)
4920                 return -EINVAL;
4921
4922         if (info->attrs[NL80211_ATTR_IE])
4923                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4924         else
4925                 ie_len = 0;
4926
4927         if (ie_len > wiphy->max_sched_scan_ie_len)
4928                 return -EINVAL;
4929
4930         mutex_lock(&rdev->sched_scan_mtx);
4931
4932         if (rdev->sched_scan_req) {
4933                 err = -EINPROGRESS;
4934                 goto out;
4935         }
4936
4937         request = kzalloc(sizeof(*request)
4938                         + sizeof(*request->ssids) * n_ssids
4939                         + sizeof(*request->match_sets) * n_match_sets
4940                         + sizeof(*request->channels) * n_channels
4941                         + ie_len, GFP_KERNEL);
4942         if (!request) {
4943                 err = -ENOMEM;
4944                 goto out;
4945         }
4946
4947         if (n_ssids)
4948                 request->ssids = (void *)&request->channels[n_channels];
4949         request->n_ssids = n_ssids;
4950         if (ie_len) {
4951                 if (request->ssids)
4952                         request->ie = (void *)(request->ssids + n_ssids);
4953                 else
4954                         request->ie = (void *)(request->channels + n_channels);
4955         }
4956
4957         if (n_match_sets) {
4958                 if (request->ie)
4959                         request->match_sets = (void *)(request->ie + ie_len);
4960                 else if (request->ssids)
4961                         request->match_sets =
4962                                 (void *)(request->ssids + n_ssids);
4963                 else
4964                         request->match_sets =
4965                                 (void *)(request->channels + n_channels);
4966         }
4967         request->n_match_sets = n_match_sets;
4968
4969         i = 0;
4970         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4971                 /* user specified, bail out if channel not found */
4972                 nla_for_each_nested(attr,
4973                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4974                                     tmp) {
4975                         struct ieee80211_channel *chan;
4976
4977                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4978
4979                         if (!chan) {
4980                                 err = -EINVAL;
4981                                 goto out_free;
4982                         }
4983
4984                         /* ignore disabled channels */
4985                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4986                                 continue;
4987
4988                         request->channels[i] = chan;
4989                         i++;
4990                 }
4991         } else {
4992                 /* all channels */
4993                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4994                         int j;
4995                         if (!wiphy->bands[band])
4996                                 continue;
4997                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4998                                 struct ieee80211_channel *chan;
4999
5000                                 chan = &wiphy->bands[band]->channels[j];
5001
5002                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5003                                         continue;
5004
5005                                 request->channels[i] = chan;
5006                                 i++;
5007                         }
5008                 }
5009         }
5010
5011         if (!i) {
5012                 err = -EINVAL;
5013                 goto out_free;
5014         }
5015
5016         request->n_channels = i;
5017
5018         i = 0;
5019         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5020                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5021                                     tmp) {
5022                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5023                                 err = -EINVAL;
5024                                 goto out_free;
5025                         }
5026                         request->ssids[i].ssid_len = nla_len(attr);
5027                         memcpy(request->ssids[i].ssid, nla_data(attr),
5028                                nla_len(attr));
5029                         i++;
5030                 }
5031         }
5032
5033         i = 0;
5034         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5035                 nla_for_each_nested(attr,
5036                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5037                                     tmp) {
5038                         struct nlattr *ssid, *rssi;
5039
5040                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5041                                   nla_data(attr), nla_len(attr),
5042                                   nl80211_match_policy);
5043                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5044                         if (ssid) {
5045                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5046                                         err = -EINVAL;
5047                                         goto out_free;
5048                                 }
5049                                 memcpy(request->match_sets[i].ssid.ssid,
5050                                        nla_data(ssid), nla_len(ssid));
5051                                 request->match_sets[i].ssid.ssid_len =
5052                                         nla_len(ssid);
5053                         }
5054                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5055                         if (rssi)
5056                                 request->rssi_thold = nla_get_u32(rssi);
5057                         else
5058                                 request->rssi_thold =
5059                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5060                         i++;
5061                 }
5062         }
5063
5064         if (info->attrs[NL80211_ATTR_IE]) {
5065                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5066                 memcpy((void *)request->ie,
5067                        nla_data(info->attrs[NL80211_ATTR_IE]),
5068                        request->ie_len);
5069         }
5070
5071         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5072                 request->flags = nla_get_u32(
5073                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5074                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5075                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5076                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5077                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5078                         err = -EOPNOTSUPP;
5079                         goto out_free;
5080                 }
5081         }
5082
5083         request->dev = dev;
5084         request->wiphy = &rdev->wiphy;
5085         request->interval = interval;
5086         request->scan_start = jiffies;
5087
5088         err = rdev_sched_scan_start(rdev, dev, request);
5089         if (!err) {
5090                 rdev->sched_scan_req = request;
5091                 nl80211_send_sched_scan(rdev, dev,
5092                                         NL80211_CMD_START_SCHED_SCAN);
5093                 goto out;
5094         }
5095
5096 out_free:
5097         kfree(request);
5098 out:
5099         mutex_unlock(&rdev->sched_scan_mtx);
5100         return err;
5101 }
5102
5103 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5104                                    struct genl_info *info)
5105 {
5106         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5107         int err;
5108
5109         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5110             !rdev->ops->sched_scan_stop)
5111                 return -EOPNOTSUPP;
5112
5113         mutex_lock(&rdev->sched_scan_mtx);
5114         err = __cfg80211_stop_sched_scan(rdev, false);
5115         mutex_unlock(&rdev->sched_scan_mtx);
5116
5117         return err;
5118 }
5119
5120 static int nl80211_start_radar_detection(struct sk_buff *skb,
5121                                          struct genl_info *info)
5122 {
5123         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5124         struct net_device *dev = info->user_ptr[1];
5125         struct wireless_dev *wdev = dev->ieee80211_ptr;
5126         struct cfg80211_chan_def chandef;
5127         int err;
5128
5129         err = nl80211_parse_chandef(rdev, info, &chandef);
5130         if (err)
5131                 return err;
5132
5133         if (wdev->cac_started)
5134                 return -EBUSY;
5135
5136         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5137         if (err < 0)
5138                 return err;
5139
5140         if (err == 0)
5141                 return -EINVAL;
5142
5143         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5144                 return -EINVAL;
5145
5146         if (!rdev->ops->start_radar_detection)
5147                 return -EOPNOTSUPP;
5148
5149         mutex_lock(&rdev->devlist_mtx);
5150         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5151                                            chandef.chan, CHAN_MODE_SHARED,
5152                                            BIT(chandef.width));
5153         if (err)
5154                 goto err_locked;
5155
5156         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5157         if (!err) {
5158                 wdev->channel = chandef.chan;
5159                 wdev->cac_started = true;
5160                 wdev->cac_start_time = jiffies;
5161         }
5162 err_locked:
5163         mutex_unlock(&rdev->devlist_mtx);
5164
5165         return err;
5166 }
5167
5168 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5169                             u32 seq, int flags,
5170                             struct cfg80211_registered_device *rdev,
5171                             struct wireless_dev *wdev,
5172                             struct cfg80211_internal_bss *intbss)
5173 {
5174         struct cfg80211_bss *res = &intbss->pub;
5175         const struct cfg80211_bss_ies *ies;
5176         void *hdr;
5177         struct nlattr *bss;
5178         bool tsf = false;
5179
5180         ASSERT_WDEV_LOCK(wdev);
5181
5182         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5183                              NL80211_CMD_NEW_SCAN_RESULTS);
5184         if (!hdr)
5185                 return -1;
5186
5187         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5188
5189         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
5190             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5191                 goto nla_put_failure;
5192
5193         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5194         if (!bss)
5195                 goto nla_put_failure;
5196         if ((!is_zero_ether_addr(res->bssid) &&
5197              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5198                 goto nla_put_failure;
5199
5200         rcu_read_lock();
5201         ies = rcu_dereference(res->ies);
5202         if (ies) {
5203                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5204                         goto fail_unlock_rcu;
5205                 tsf = true;
5206                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5207                                         ies->len, ies->data))
5208                         goto fail_unlock_rcu;
5209         }
5210         ies = rcu_dereference(res->beacon_ies);
5211         if (ies) {
5212                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5213                         goto fail_unlock_rcu;
5214                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5215                                         ies->len, ies->data))
5216                         goto fail_unlock_rcu;
5217         }
5218         rcu_read_unlock();
5219
5220         if (res->beacon_interval &&
5221             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5222                 goto nla_put_failure;
5223         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5224             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5225             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5226                         jiffies_to_msecs(jiffies - intbss->ts)))
5227                 goto nla_put_failure;
5228
5229         switch (rdev->wiphy.signal_type) {
5230         case CFG80211_SIGNAL_TYPE_MBM:
5231                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5232                         goto nla_put_failure;
5233                 break;
5234         case CFG80211_SIGNAL_TYPE_UNSPEC:
5235                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5236                         goto nla_put_failure;
5237                 break;
5238         default:
5239                 break;
5240         }
5241
5242         switch (wdev->iftype) {
5243         case NL80211_IFTYPE_P2P_CLIENT:
5244         case NL80211_IFTYPE_STATION:
5245                 if (intbss == wdev->current_bss &&
5246                     nla_put_u32(msg, NL80211_BSS_STATUS,
5247                                 NL80211_BSS_STATUS_ASSOCIATED))
5248                         goto nla_put_failure;
5249                 break;
5250         case NL80211_IFTYPE_ADHOC:
5251                 if (intbss == wdev->current_bss &&
5252                     nla_put_u32(msg, NL80211_BSS_STATUS,
5253                                 NL80211_BSS_STATUS_IBSS_JOINED))
5254                         goto nla_put_failure;
5255                 break;
5256         default:
5257                 break;
5258         }
5259
5260         nla_nest_end(msg, bss);
5261
5262         return genlmsg_end(msg, hdr);
5263
5264  fail_unlock_rcu:
5265         rcu_read_unlock();
5266  nla_put_failure:
5267         genlmsg_cancel(msg, hdr);
5268         return -EMSGSIZE;
5269 }
5270
5271 static int nl80211_dump_scan(struct sk_buff *skb,
5272                              struct netlink_callback *cb)
5273 {
5274         struct cfg80211_registered_device *rdev;
5275         struct net_device *dev;
5276         struct cfg80211_internal_bss *scan;
5277         struct wireless_dev *wdev;
5278         int start = cb->args[1], idx = 0;
5279         int err;
5280
5281         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
5282         if (err)
5283                 return err;
5284
5285         wdev = dev->ieee80211_ptr;
5286
5287         wdev_lock(wdev);
5288         spin_lock_bh(&rdev->bss_lock);
5289         cfg80211_bss_expire(rdev);
5290
5291         cb->seq = rdev->bss_generation;
5292
5293         list_for_each_entry(scan, &rdev->bss_list, list) {
5294                 if (++idx <= start)
5295                         continue;
5296                 if (nl80211_send_bss(skb, cb,
5297                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5298                                 rdev, wdev, scan) < 0) {
5299                         idx--;
5300                         break;
5301                 }
5302         }
5303
5304         spin_unlock_bh(&rdev->bss_lock);
5305         wdev_unlock(wdev);
5306
5307         cb->args[1] = idx;
5308         nl80211_finish_netdev_dump(rdev);
5309
5310         return skb->len;
5311 }
5312
5313 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5314                                 int flags, struct net_device *dev,
5315                                 struct survey_info *survey)
5316 {
5317         void *hdr;
5318         struct nlattr *infoattr;
5319
5320         hdr = nl80211hdr_put(msg, portid, seq, flags,
5321                              NL80211_CMD_NEW_SURVEY_RESULTS);
5322         if (!hdr)
5323                 return -ENOMEM;
5324
5325         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5326                 goto nla_put_failure;
5327
5328         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5329         if (!infoattr)
5330                 goto nla_put_failure;
5331
5332         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5333                         survey->channel->center_freq))
5334                 goto nla_put_failure;
5335
5336         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5337             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5338                 goto nla_put_failure;
5339         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5340             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5341                 goto nla_put_failure;
5342         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5343             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5344                         survey->channel_time))
5345                 goto nla_put_failure;
5346         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5347             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5348                         survey->channel_time_busy))
5349                 goto nla_put_failure;
5350         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5351             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5352                         survey->channel_time_ext_busy))
5353                 goto nla_put_failure;
5354         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5355             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5356                         survey->channel_time_rx))
5357                 goto nla_put_failure;
5358         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5359             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5360                         survey->channel_time_tx))
5361                 goto nla_put_failure;
5362
5363         nla_nest_end(msg, infoattr);
5364
5365         return genlmsg_end(msg, hdr);
5366
5367  nla_put_failure:
5368         genlmsg_cancel(msg, hdr);
5369         return -EMSGSIZE;
5370 }
5371
5372 static int nl80211_dump_survey(struct sk_buff *skb,
5373                         struct netlink_callback *cb)
5374 {
5375         struct survey_info survey;
5376         struct cfg80211_registered_device *dev;
5377         struct net_device *netdev;
5378         int survey_idx = cb->args[1];
5379         int res;
5380
5381         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5382         if (res)
5383                 return res;
5384
5385         if (!dev->ops->dump_survey) {
5386                 res = -EOPNOTSUPP;
5387                 goto out_err;
5388         }
5389
5390         while (1) {
5391                 struct ieee80211_channel *chan;
5392
5393                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5394                 if (res == -ENOENT)
5395                         break;
5396                 if (res)
5397                         goto out_err;
5398
5399                 /* Survey without a channel doesn't make sense */
5400                 if (!survey.channel) {
5401                         res = -EINVAL;
5402                         goto out;
5403                 }
5404
5405                 chan = ieee80211_get_channel(&dev->wiphy,
5406                                              survey.channel->center_freq);
5407                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5408                         survey_idx++;
5409                         continue;
5410                 }
5411
5412                 if (nl80211_send_survey(skb,
5413                                 NETLINK_CB(cb->skb).portid,
5414                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5415                                 netdev,
5416                                 &survey) < 0)
5417                         goto out;
5418                 survey_idx++;
5419         }
5420
5421  out:
5422         cb->args[1] = survey_idx;
5423         res = skb->len;
5424  out_err:
5425         nl80211_finish_netdev_dump(dev);
5426         return res;
5427 }
5428
5429 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5430 {
5431         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5432                                   NL80211_WPA_VERSION_2));
5433 }
5434
5435 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5436 {
5437         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5438         struct net_device *dev = info->user_ptr[1];
5439         struct ieee80211_channel *chan;
5440         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5441         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5442         enum nl80211_auth_type auth_type;
5443         struct key_parse key;
5444         bool local_state_change;
5445
5446         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5447                 return -EINVAL;
5448
5449         if (!info->attrs[NL80211_ATTR_MAC])
5450                 return -EINVAL;
5451
5452         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5453                 return -EINVAL;
5454
5455         if (!info->attrs[NL80211_ATTR_SSID])
5456                 return -EINVAL;
5457
5458         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5459                 return -EINVAL;
5460
5461         err = nl80211_parse_key(info, &key);
5462         if (err)
5463                 return err;
5464
5465         if (key.idx >= 0) {
5466                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5467                         return -EINVAL;
5468                 if (!key.p.key || !key.p.key_len)
5469                         return -EINVAL;
5470                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5471                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5472                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5473                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5474                         return -EINVAL;
5475                 if (key.idx > 4)
5476                         return -EINVAL;
5477         } else {
5478                 key.p.key_len = 0;
5479                 key.p.key = NULL;
5480         }
5481
5482         if (key.idx >= 0) {
5483                 int i;
5484                 bool ok = false;
5485                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5486                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5487                                 ok = true;
5488                                 break;
5489                         }
5490                 }
5491                 if (!ok)
5492                         return -EINVAL;
5493         }
5494
5495         if (!rdev->ops->auth)
5496                 return -EOPNOTSUPP;
5497
5498         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5499             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5500                 return -EOPNOTSUPP;
5501
5502         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5503         chan = ieee80211_get_channel(&rdev->wiphy,
5504                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5505         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5506                 return -EINVAL;
5507
5508         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5509         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5510
5511         if (info->attrs[NL80211_ATTR_IE]) {
5512                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5513                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5514         }
5515
5516         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5517         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5518                 return -EINVAL;
5519
5520         if (auth_type == NL80211_AUTHTYPE_SAE &&
5521             !info->attrs[NL80211_ATTR_SAE_DATA])
5522                 return -EINVAL;
5523
5524         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5525                 if (auth_type != NL80211_AUTHTYPE_SAE)
5526                         return -EINVAL;
5527                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5528                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5529                 /* need to include at least Auth Transaction and Status Code */
5530                 if (sae_data_len < 4)
5531                         return -EINVAL;
5532         }
5533
5534         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5535
5536         /*
5537          * Since we no longer track auth state, ignore
5538          * requests to only change local state.
5539          */
5540         if (local_state_change)
5541                 return 0;
5542
5543         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5544                                   ssid, ssid_len, ie, ie_len,
5545                                   key.p.key, key.p.key_len, key.idx,
5546                                   sae_data, sae_data_len);
5547 }
5548
5549 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5550                                    struct genl_info *info,
5551                                    struct cfg80211_crypto_settings *settings,
5552                                    int cipher_limit)
5553 {
5554         memset(settings, 0, sizeof(*settings));
5555
5556         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5557
5558         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5559                 u16 proto;
5560                 proto = nla_get_u16(
5561                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5562                 settings->control_port_ethertype = cpu_to_be16(proto);
5563                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5564                     proto != ETH_P_PAE)
5565                         return -EINVAL;
5566                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5567                         settings->control_port_no_encrypt = true;
5568         } else
5569                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5570
5571         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5572                 void *data;
5573                 int len, i;
5574
5575                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5576                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5577                 settings->n_ciphers_pairwise = len / sizeof(u32);
5578
5579                 if (len % sizeof(u32))
5580                         return -EINVAL;
5581
5582                 if (settings->n_ciphers_pairwise > cipher_limit)
5583                         return -EINVAL;
5584
5585                 memcpy(settings->ciphers_pairwise, data, len);
5586
5587                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5588                         if (!cfg80211_supported_cipher_suite(
5589                                         &rdev->wiphy,
5590                                         settings->ciphers_pairwise[i]))
5591                                 return -EINVAL;
5592         }
5593
5594         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5595                 settings->cipher_group =
5596                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5597                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5598                                                      settings->cipher_group))
5599                         return -EINVAL;
5600         }
5601
5602         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5603                 settings->wpa_versions =
5604                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5605                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5606                         return -EINVAL;
5607         }
5608
5609         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5610                 void *data;
5611                 int len;
5612
5613                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5614                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5615                 settings->n_akm_suites = len / sizeof(u32);
5616
5617                 if (len % sizeof(u32))
5618                         return -EINVAL;
5619
5620                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5621                         return -EINVAL;
5622
5623                 memcpy(settings->akm_suites, data, len);
5624         }
5625
5626         return 0;
5627 }
5628
5629 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5630 {
5631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5632         struct net_device *dev = info->user_ptr[1];
5633         struct cfg80211_crypto_settings crypto;
5634         struct ieee80211_channel *chan;
5635         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5636         int err, ssid_len, ie_len = 0;
5637         bool use_mfp = false;
5638         u32 flags = 0;
5639         struct ieee80211_ht_cap *ht_capa = NULL;
5640         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5641
5642         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5643                 return -EINVAL;
5644
5645         if (!info->attrs[NL80211_ATTR_MAC] ||
5646             !info->attrs[NL80211_ATTR_SSID] ||
5647             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5648                 return -EINVAL;
5649
5650         if (!rdev->ops->assoc)
5651                 return -EOPNOTSUPP;
5652
5653         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5654             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5655                 return -EOPNOTSUPP;
5656
5657         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5658
5659         chan = ieee80211_get_channel(&rdev->wiphy,
5660                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5661         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5662                 return -EINVAL;
5663
5664         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5665         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5666
5667         if (info->attrs[NL80211_ATTR_IE]) {
5668                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5669                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5670         }
5671
5672         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5673                 enum nl80211_mfp mfp =
5674                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5675                 if (mfp == NL80211_MFP_REQUIRED)
5676                         use_mfp = true;
5677                 else if (mfp != NL80211_MFP_NO)
5678                         return -EINVAL;
5679         }
5680
5681         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5682                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5683
5684         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5685                 flags |= ASSOC_REQ_DISABLE_HT;
5686
5687         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5688                 ht_capa_mask =
5689                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5690
5691         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5692                 if (!ht_capa_mask)
5693                         return -EINVAL;
5694                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5695         }
5696
5697         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5698         if (!err)
5699                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5700                                           ssid, ssid_len, ie, ie_len, use_mfp,
5701                                           &crypto, flags, ht_capa,
5702                                           ht_capa_mask);
5703
5704         return err;
5705 }
5706
5707 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5708 {
5709         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5710         struct net_device *dev = info->user_ptr[1];
5711         const u8 *ie = NULL, *bssid;
5712         int ie_len = 0;
5713         u16 reason_code;
5714         bool local_state_change;
5715
5716         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5717                 return -EINVAL;
5718
5719         if (!info->attrs[NL80211_ATTR_MAC])
5720                 return -EINVAL;
5721
5722         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5723                 return -EINVAL;
5724
5725         if (!rdev->ops->deauth)
5726                 return -EOPNOTSUPP;
5727
5728         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5729             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5730                 return -EOPNOTSUPP;
5731
5732         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5733
5734         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5735         if (reason_code == 0) {
5736                 /* Reason Code 0 is reserved */
5737                 return -EINVAL;
5738         }
5739
5740         if (info->attrs[NL80211_ATTR_IE]) {
5741                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5742                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5743         }
5744
5745         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5746
5747         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5748                                     local_state_change);
5749 }
5750
5751 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5752 {
5753         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5754         struct net_device *dev = info->user_ptr[1];
5755         const u8 *ie = NULL, *bssid;
5756         int ie_len = 0;
5757         u16 reason_code;
5758         bool local_state_change;
5759
5760         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5761                 return -EINVAL;
5762
5763         if (!info->attrs[NL80211_ATTR_MAC])
5764                 return -EINVAL;
5765
5766         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5767                 return -EINVAL;
5768
5769         if (!rdev->ops->disassoc)
5770                 return -EOPNOTSUPP;
5771
5772         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5773             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5774                 return -EOPNOTSUPP;
5775
5776         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5777
5778         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5779         if (reason_code == 0) {
5780                 /* Reason Code 0 is reserved */
5781                 return -EINVAL;
5782         }
5783
5784         if (info->attrs[NL80211_ATTR_IE]) {
5785                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5786                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5787         }
5788
5789         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5790
5791         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5792                                       local_state_change);
5793 }
5794
5795 static bool
5796 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5797                          int mcast_rate[IEEE80211_NUM_BANDS],
5798                          int rateval)
5799 {
5800         struct wiphy *wiphy = &rdev->wiphy;
5801         bool found = false;
5802         int band, i;
5803
5804         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5805                 struct ieee80211_supported_band *sband;
5806
5807                 sband = wiphy->bands[band];
5808                 if (!sband)
5809                         continue;
5810
5811                 for (i = 0; i < sband->n_bitrates; i++) {
5812                         if (sband->bitrates[i].bitrate == rateval) {
5813                                 mcast_rate[band] = i + 1;
5814                                 found = true;
5815                                 break;
5816                         }
5817                 }
5818         }
5819
5820         return found;
5821 }
5822
5823 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5824 {
5825         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5826         struct net_device *dev = info->user_ptr[1];
5827         struct cfg80211_ibss_params ibss;
5828         struct wiphy *wiphy;
5829         struct cfg80211_cached_keys *connkeys = NULL;
5830         int err;
5831
5832         memset(&ibss, 0, sizeof(ibss));
5833
5834         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5835                 return -EINVAL;
5836
5837         if (!info->attrs[NL80211_ATTR_SSID] ||
5838             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5839                 return -EINVAL;
5840
5841         ibss.beacon_interval = 100;
5842
5843         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5844                 ibss.beacon_interval =
5845                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5846                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5847                         return -EINVAL;
5848         }
5849
5850         if (!rdev->ops->join_ibss)
5851                 return -EOPNOTSUPP;
5852
5853         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5854                 return -EOPNOTSUPP;
5855
5856         wiphy = &rdev->wiphy;
5857
5858         if (info->attrs[NL80211_ATTR_MAC]) {
5859                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5860
5861                 if (!is_valid_ether_addr(ibss.bssid))
5862                         return -EINVAL;
5863         }
5864         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5865         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5866
5867         if (info->attrs[NL80211_ATTR_IE]) {
5868                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5869                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5870         }
5871
5872         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5873         if (err)
5874                 return err;
5875
5876         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5877                 return -EINVAL;
5878
5879         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5880                 return -EINVAL;
5881         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5882             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5883                 return -EINVAL;
5884
5885         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5886         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5887
5888         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5889                 u8 *rates =
5890                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5891                 int n_rates =
5892                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5893                 struct ieee80211_supported_band *sband =
5894                         wiphy->bands[ibss.chandef.chan->band];
5895
5896                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5897                                              &ibss.basic_rates);
5898                 if (err)
5899                         return err;
5900         }
5901
5902         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5903             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5904                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5905                 return -EINVAL;
5906
5907         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5908                 bool no_ht = false;
5909
5910                 connkeys = nl80211_parse_connkeys(rdev,
5911                                           info->attrs[NL80211_ATTR_KEYS],
5912                                           &no_ht);
5913                 if (IS_ERR(connkeys))
5914                         return PTR_ERR(connkeys);
5915
5916                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5917                     no_ht) {
5918                         kfree(connkeys);
5919                         return -EINVAL;
5920                 }
5921         }
5922
5923         ibss.control_port =
5924                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5925
5926         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5927         if (err)
5928                 kfree(connkeys);
5929         return err;
5930 }
5931
5932 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5933 {
5934         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5935         struct net_device *dev = info->user_ptr[1];
5936
5937         if (!rdev->ops->leave_ibss)
5938                 return -EOPNOTSUPP;
5939
5940         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5941                 return -EOPNOTSUPP;
5942
5943         return cfg80211_leave_ibss(rdev, dev, false);
5944 }
5945
5946 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5947 {
5948         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5949         struct net_device *dev = info->user_ptr[1];
5950         int mcast_rate[IEEE80211_NUM_BANDS];
5951         u32 nla_rate;
5952         int err;
5953
5954         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5955             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5956                 return -EOPNOTSUPP;
5957
5958         if (!rdev->ops->set_mcast_rate)
5959                 return -EOPNOTSUPP;
5960
5961         memset(mcast_rate, 0, sizeof(mcast_rate));
5962
5963         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5964                 return -EINVAL;
5965
5966         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5967         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5968                 return -EINVAL;
5969
5970         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5971
5972         return err;
5973 }
5974
5975
5976 #ifdef CONFIG_NL80211_TESTMODE
5977 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5978         .name = "testmode",
5979 };
5980
5981 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5982 {
5983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5984         int err;
5985
5986         if (!info->attrs[NL80211_ATTR_TESTDATA])
5987                 return -EINVAL;
5988
5989         err = -EOPNOTSUPP;
5990         if (rdev->ops->testmode_cmd) {
5991                 rdev->testmode_info = info;
5992                 err = rdev_testmode_cmd(rdev,
5993                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5994                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5995                 rdev->testmode_info = NULL;
5996         }
5997
5998         return err;
5999 }
6000
6001 static int nl80211_testmode_dump(struct sk_buff *skb,
6002                                  struct netlink_callback *cb)
6003 {
6004         struct cfg80211_registered_device *rdev;
6005         int err;
6006         long phy_idx;
6007         void *data = NULL;
6008         int data_len = 0;
6009
6010         if (cb->args[0]) {
6011                 /*
6012                  * 0 is a valid index, but not valid for args[0],
6013                  * so we need to offset by 1.
6014                  */
6015                 phy_idx = cb->args[0] - 1;
6016         } else {
6017                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6018                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6019                                   nl80211_policy);
6020                 if (err)
6021                         return err;
6022
6023                 mutex_lock(&cfg80211_mutex);
6024                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6025                                                   nl80211_fam.attrbuf);
6026                 if (IS_ERR(rdev)) {
6027                         mutex_unlock(&cfg80211_mutex);
6028                         return PTR_ERR(rdev);
6029                 }
6030                 phy_idx = rdev->wiphy_idx;
6031                 rdev = NULL;
6032                 mutex_unlock(&cfg80211_mutex);
6033
6034                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6035                         cb->args[1] =
6036                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6037         }
6038
6039         if (cb->args[1]) {
6040                 data = nla_data((void *)cb->args[1]);
6041                 data_len = nla_len((void *)cb->args[1]);
6042         }
6043
6044         mutex_lock(&cfg80211_mutex);
6045         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6046         if (!rdev) {
6047                 mutex_unlock(&cfg80211_mutex);
6048                 return -ENOENT;
6049         }
6050         cfg80211_lock_rdev(rdev);
6051         mutex_unlock(&cfg80211_mutex);
6052
6053         if (!rdev->ops->testmode_dump) {
6054                 err = -EOPNOTSUPP;
6055                 goto out_err;
6056         }
6057
6058         while (1) {
6059                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6060                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6061                                            NL80211_CMD_TESTMODE);
6062                 struct nlattr *tmdata;
6063
6064                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6065                         genlmsg_cancel(skb, hdr);
6066                         break;
6067                 }
6068
6069                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6070                 if (!tmdata) {
6071                         genlmsg_cancel(skb, hdr);
6072                         break;
6073                 }
6074                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6075                 nla_nest_end(skb, tmdata);
6076
6077                 if (err == -ENOBUFS || err == -ENOENT) {
6078                         genlmsg_cancel(skb, hdr);
6079                         break;
6080                 } else if (err) {
6081                         genlmsg_cancel(skb, hdr);
6082                         goto out_err;
6083                 }
6084
6085                 genlmsg_end(skb, hdr);
6086         }
6087
6088         err = skb->len;
6089         /* see above */
6090         cb->args[0] = phy_idx + 1;
6091  out_err:
6092         cfg80211_unlock_rdev(rdev);
6093         return err;
6094 }
6095
6096 static struct sk_buff *
6097 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6098                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6099 {
6100         struct sk_buff *skb;
6101         void *hdr;
6102         struct nlattr *data;
6103
6104         skb = nlmsg_new(approxlen + 100, gfp);
6105         if (!skb)
6106                 return NULL;
6107
6108         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6109         if (!hdr) {
6110                 kfree_skb(skb);
6111                 return NULL;
6112         }
6113
6114         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6115                 goto nla_put_failure;
6116         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6117
6118         ((void **)skb->cb)[0] = rdev;
6119         ((void **)skb->cb)[1] = hdr;
6120         ((void **)skb->cb)[2] = data;
6121
6122         return skb;
6123
6124  nla_put_failure:
6125         kfree_skb(skb);
6126         return NULL;
6127 }
6128
6129 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6130                                                   int approxlen)
6131 {
6132         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6133
6134         if (WARN_ON(!rdev->testmode_info))
6135                 return NULL;
6136
6137         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6138                                 rdev->testmode_info->snd_portid,
6139                                 rdev->testmode_info->snd_seq,
6140                                 GFP_KERNEL);
6141 }
6142 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6143
6144 int cfg80211_testmode_reply(struct sk_buff *skb)
6145 {
6146         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6147         void *hdr = ((void **)skb->cb)[1];
6148         struct nlattr *data = ((void **)skb->cb)[2];
6149
6150         if (WARN_ON(!rdev->testmode_info)) {
6151                 kfree_skb(skb);
6152                 return -EINVAL;
6153         }
6154
6155         nla_nest_end(skb, data);
6156         genlmsg_end(skb, hdr);
6157         return genlmsg_reply(skb, rdev->testmode_info);
6158 }
6159 EXPORT_SYMBOL(cfg80211_testmode_reply);
6160
6161 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6162                                                   int approxlen, gfp_t gfp)
6163 {
6164         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6165
6166         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6167 }
6168 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6169
6170 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6171 {
6172         void *hdr = ((void **)skb->cb)[1];
6173         struct nlattr *data = ((void **)skb->cb)[2];
6174
6175         nla_nest_end(skb, data);
6176         genlmsg_end(skb, hdr);
6177         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6178 }
6179 EXPORT_SYMBOL(cfg80211_testmode_event);
6180 #endif
6181
6182 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6183 {
6184         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6185         struct net_device *dev = info->user_ptr[1];
6186         struct cfg80211_connect_params connect;
6187         struct wiphy *wiphy;
6188         struct cfg80211_cached_keys *connkeys = NULL;
6189         int err;
6190
6191         memset(&connect, 0, sizeof(connect));
6192
6193         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6194                 return -EINVAL;
6195
6196         if (!info->attrs[NL80211_ATTR_SSID] ||
6197             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6198                 return -EINVAL;
6199
6200         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6201                 connect.auth_type =
6202                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6203                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6204                                              NL80211_CMD_CONNECT))
6205                         return -EINVAL;
6206         } else
6207                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6208
6209         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6210
6211         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6212                                       NL80211_MAX_NR_CIPHER_SUITES);
6213         if (err)
6214                 return err;
6215
6216         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6217             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6218                 return -EOPNOTSUPP;
6219
6220         wiphy = &rdev->wiphy;
6221
6222         connect.bg_scan_period = -1;
6223         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6224                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6225                 connect.bg_scan_period =
6226                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6227         }
6228
6229         if (info->attrs[NL80211_ATTR_MAC])
6230                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6231         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6232         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6233
6234         if (info->attrs[NL80211_ATTR_IE]) {
6235                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6236                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6237         }
6238
6239         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6240                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6241                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6242                     connect.mfp != NL80211_MFP_NO)
6243                         return -EINVAL;
6244         } else {
6245                 connect.mfp = NL80211_MFP_NO;
6246         }
6247
6248         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6249                 connect.channel =
6250                         ieee80211_get_channel(wiphy,
6251                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6252                 if (!connect.channel ||
6253                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6254                         return -EINVAL;
6255         }
6256
6257         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6258                 connkeys = nl80211_parse_connkeys(rdev,
6259                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6260                 if (IS_ERR(connkeys))
6261                         return PTR_ERR(connkeys);
6262         }
6263
6264         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6265                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6266
6267         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6268                 memcpy(&connect.ht_capa_mask,
6269                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6270                        sizeof(connect.ht_capa_mask));
6271
6272         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6273                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6274                         kfree(connkeys);
6275                         return -EINVAL;
6276                 }
6277                 memcpy(&connect.ht_capa,
6278                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6279                        sizeof(connect.ht_capa));
6280         }
6281
6282         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6283         if (err)
6284                 kfree(connkeys);
6285         return err;
6286 }
6287
6288 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6289 {
6290         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6291         struct net_device *dev = info->user_ptr[1];
6292         u16 reason;
6293
6294         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6295                 reason = WLAN_REASON_DEAUTH_LEAVING;
6296         else
6297                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6298
6299         if (reason == 0)
6300                 return -EINVAL;
6301
6302         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6303             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6304                 return -EOPNOTSUPP;
6305
6306         return cfg80211_disconnect(rdev, dev, reason, true);
6307 }
6308
6309 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6310 {
6311         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6312         struct net *net;
6313         int err;
6314         u32 pid;
6315
6316         if (!info->attrs[NL80211_ATTR_PID])
6317                 return -EINVAL;
6318
6319         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6320
6321         net = get_net_ns_by_pid(pid);
6322         if (IS_ERR(net))
6323                 return PTR_ERR(net);
6324
6325         err = 0;
6326
6327         /* check if anything to do */
6328         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6329                 err = cfg80211_switch_netns(rdev, net);
6330
6331         put_net(net);
6332         return err;
6333 }
6334
6335 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6336 {
6337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6338         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6339                         struct cfg80211_pmksa *pmksa) = NULL;
6340         struct net_device *dev = info->user_ptr[1];
6341         struct cfg80211_pmksa pmksa;
6342
6343         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6344
6345         if (!info->attrs[NL80211_ATTR_MAC])
6346                 return -EINVAL;
6347
6348         if (!info->attrs[NL80211_ATTR_PMKID])
6349                 return -EINVAL;
6350
6351         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6352         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6353
6354         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6355             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6356                 return -EOPNOTSUPP;
6357
6358         switch (info->genlhdr->cmd) {
6359         case NL80211_CMD_SET_PMKSA:
6360                 rdev_ops = rdev->ops->set_pmksa;
6361                 break;
6362         case NL80211_CMD_DEL_PMKSA:
6363                 rdev_ops = rdev->ops->del_pmksa;
6364                 break;
6365         default:
6366                 WARN_ON(1);
6367                 break;
6368         }
6369
6370         if (!rdev_ops)
6371                 return -EOPNOTSUPP;
6372
6373         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6374 }
6375
6376 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6377 {
6378         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6379         struct net_device *dev = info->user_ptr[1];
6380
6381         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6382             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6383                 return -EOPNOTSUPP;
6384
6385         if (!rdev->ops->flush_pmksa)
6386                 return -EOPNOTSUPP;
6387
6388         return rdev_flush_pmksa(rdev, dev);
6389 }
6390
6391 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6392 {
6393         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6394         struct net_device *dev = info->user_ptr[1];
6395         u8 action_code, dialog_token;
6396         u16 status_code;
6397         u8 *peer;
6398
6399         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6400             !rdev->ops->tdls_mgmt)
6401                 return -EOPNOTSUPP;
6402
6403         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6404             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6405             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6406             !info->attrs[NL80211_ATTR_IE] ||
6407             !info->attrs[NL80211_ATTR_MAC])
6408                 return -EINVAL;
6409
6410         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6411         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6412         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6413         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6414
6415         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6416                               dialog_token, status_code,
6417                               nla_data(info->attrs[NL80211_ATTR_IE]),
6418                               nla_len(info->attrs[NL80211_ATTR_IE]));
6419 }
6420
6421 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6422 {
6423         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6424         struct net_device *dev = info->user_ptr[1];
6425         enum nl80211_tdls_operation operation;
6426         u8 *peer;
6427
6428         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6429             !rdev->ops->tdls_oper)
6430                 return -EOPNOTSUPP;
6431
6432         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6433             !info->attrs[NL80211_ATTR_MAC])
6434                 return -EINVAL;
6435
6436         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6437         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6438
6439         return rdev_tdls_oper(rdev, dev, peer, operation);
6440 }
6441
6442 static int nl80211_remain_on_channel(struct sk_buff *skb,
6443                                      struct genl_info *info)
6444 {
6445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6446         struct wireless_dev *wdev = info->user_ptr[1];
6447         struct cfg80211_chan_def chandef;
6448         struct sk_buff *msg;
6449         void *hdr;
6450         u64 cookie;
6451         u32 duration;
6452         int err;
6453
6454         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6455             !info->attrs[NL80211_ATTR_DURATION])
6456                 return -EINVAL;
6457
6458         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6459
6460         if (!rdev->ops->remain_on_channel ||
6461             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6462                 return -EOPNOTSUPP;
6463
6464         /*
6465          * We should be on that channel for at least a minimum amount of
6466          * time (10ms) but no longer than the driver supports.
6467          */
6468         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6469             duration > rdev->wiphy.max_remain_on_channel_duration)
6470                 return -EINVAL;
6471
6472         err = nl80211_parse_chandef(rdev, info, &chandef);
6473         if (err)
6474                 return err;
6475
6476         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6477         if (!msg)
6478                 return -ENOMEM;
6479
6480         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6481                              NL80211_CMD_REMAIN_ON_CHANNEL);
6482
6483         if (IS_ERR(hdr)) {
6484                 err = PTR_ERR(hdr);
6485                 goto free_msg;
6486         }
6487
6488         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6489                                      duration, &cookie);
6490
6491         if (err)
6492                 goto free_msg;
6493
6494         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6495                 goto nla_put_failure;
6496
6497         genlmsg_end(msg, hdr);
6498
6499         return genlmsg_reply(msg, info);
6500
6501  nla_put_failure:
6502         err = -ENOBUFS;
6503  free_msg:
6504         nlmsg_free(msg);
6505         return err;
6506 }
6507
6508 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6509                                             struct genl_info *info)
6510 {
6511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6512         struct wireless_dev *wdev = info->user_ptr[1];
6513         u64 cookie;
6514
6515         if (!info->attrs[NL80211_ATTR_COOKIE])
6516                 return -EINVAL;
6517
6518         if (!rdev->ops->cancel_remain_on_channel)
6519                 return -EOPNOTSUPP;
6520
6521         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6522
6523         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6524 }
6525
6526 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6527                            u8 *rates, u8 rates_len)
6528 {
6529         u8 i;
6530         u32 mask = 0;
6531
6532         for (i = 0; i < rates_len; i++) {
6533                 int rate = (rates[i] & 0x7f) * 5;
6534                 int ridx;
6535                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6536                         struct ieee80211_rate *srate =
6537                                 &sband->bitrates[ridx];
6538                         if (rate == srate->bitrate) {
6539                                 mask |= 1 << ridx;
6540                                 break;
6541                         }
6542                 }
6543                 if (ridx == sband->n_bitrates)
6544                         return 0; /* rate not found */
6545         }
6546
6547         return mask;
6548 }
6549
6550 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6551                                u8 *rates, u8 rates_len,
6552                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6553 {
6554         u8 i;
6555
6556         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6557
6558         for (i = 0; i < rates_len; i++) {
6559                 int ridx, rbit;
6560
6561                 ridx = rates[i] / 8;
6562                 rbit = BIT(rates[i] % 8);
6563
6564                 /* check validity */
6565                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6566                         return false;
6567
6568                 /* check availability */
6569                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6570                         mcs[ridx] |= rbit;
6571                 else
6572                         return false;
6573         }
6574
6575         return true;
6576 }
6577
6578 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6579         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6580                                     .len = NL80211_MAX_SUPP_RATES },
6581         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6582                                  .len = NL80211_MAX_SUPP_HT_RATES },
6583 };
6584
6585 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6586                                        struct genl_info *info)
6587 {
6588         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6589         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6590         struct cfg80211_bitrate_mask mask;
6591         int rem, i;
6592         struct net_device *dev = info->user_ptr[1];
6593         struct nlattr *tx_rates;
6594         struct ieee80211_supported_band *sband;
6595
6596         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6597                 return -EINVAL;
6598
6599         if (!rdev->ops->set_bitrate_mask)
6600                 return -EOPNOTSUPP;
6601
6602         memset(&mask, 0, sizeof(mask));
6603         /* Default to all rates enabled */
6604         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6605                 sband = rdev->wiphy.bands[i];
6606                 mask.control[i].legacy =
6607                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6608                 if (sband)
6609                         memcpy(mask.control[i].mcs,
6610                                sband->ht_cap.mcs.rx_mask,
6611                                sizeof(mask.control[i].mcs));
6612                 else
6613                         memset(mask.control[i].mcs, 0,
6614                                sizeof(mask.control[i].mcs));
6615         }
6616
6617         /*
6618          * The nested attribute uses enum nl80211_band as the index. This maps
6619          * directly to the enum ieee80211_band values used in cfg80211.
6620          */
6621         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6622         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6623         {
6624                 enum ieee80211_band band = nla_type(tx_rates);
6625                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6626                         return -EINVAL;
6627                 sband = rdev->wiphy.bands[band];
6628                 if (sband == NULL)
6629                         return -EINVAL;
6630                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6631                           nla_len(tx_rates), nl80211_txattr_policy);
6632                 if (tb[NL80211_TXRATE_LEGACY]) {
6633                         mask.control[band].legacy = rateset_to_mask(
6634                                 sband,
6635                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6636                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6637                         if ((mask.control[band].legacy == 0) &&
6638                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6639                                 return -EINVAL;
6640                 }
6641                 if (tb[NL80211_TXRATE_MCS]) {
6642                         if (!ht_rateset_to_mask(
6643                                         sband,
6644                                         nla_data(tb[NL80211_TXRATE_MCS]),
6645                                         nla_len(tb[NL80211_TXRATE_MCS]),
6646                                         mask.control[band].mcs))
6647                                 return -EINVAL;
6648                 }
6649
6650                 if (mask.control[band].legacy == 0) {
6651                         /* don't allow empty legacy rates if HT
6652                          * is not even supported. */
6653                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6654                                 return -EINVAL;
6655
6656                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6657                                 if (mask.control[band].mcs[i])
6658                                         break;
6659
6660                         /* legacy and mcs rates may not be both empty */
6661                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6662                                 return -EINVAL;
6663                 }
6664         }
6665
6666         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6667 }
6668
6669 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6670 {
6671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6672         struct wireless_dev *wdev = info->user_ptr[1];
6673         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6674
6675         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6676                 return -EINVAL;
6677
6678         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6679                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6680
6681         switch (wdev->iftype) {
6682         case NL80211_IFTYPE_STATION:
6683         case NL80211_IFTYPE_ADHOC:
6684         case NL80211_IFTYPE_P2P_CLIENT:
6685         case NL80211_IFTYPE_AP:
6686         case NL80211_IFTYPE_AP_VLAN:
6687         case NL80211_IFTYPE_MESH_POINT:
6688         case NL80211_IFTYPE_P2P_GO:
6689         case NL80211_IFTYPE_P2P_DEVICE:
6690                 break;
6691         default:
6692                 return -EOPNOTSUPP;
6693         }
6694
6695         /* not much point in registering if we can't reply */
6696         if (!rdev->ops->mgmt_tx)
6697                 return -EOPNOTSUPP;
6698
6699         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6700                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6701                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6702 }
6703
6704 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6705 {
6706         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6707         struct wireless_dev *wdev = info->user_ptr[1];
6708         struct cfg80211_chan_def chandef;
6709         int err;
6710         void *hdr = NULL;
6711         u64 cookie;
6712         struct sk_buff *msg = NULL;
6713         unsigned int wait = 0;
6714         bool offchan, no_cck, dont_wait_for_ack;
6715
6716         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6717
6718         if (!info->attrs[NL80211_ATTR_FRAME])
6719                 return -EINVAL;
6720
6721         if (!rdev->ops->mgmt_tx)
6722                 return -EOPNOTSUPP;
6723
6724         switch (wdev->iftype) {
6725         case NL80211_IFTYPE_STATION:
6726         case NL80211_IFTYPE_ADHOC:
6727         case NL80211_IFTYPE_P2P_CLIENT:
6728         case NL80211_IFTYPE_AP:
6729         case NL80211_IFTYPE_AP_VLAN:
6730         case NL80211_IFTYPE_MESH_POINT:
6731         case NL80211_IFTYPE_P2P_GO:
6732         case NL80211_IFTYPE_P2P_DEVICE:
6733                 break;
6734         default:
6735                 return -EOPNOTSUPP;
6736         }
6737
6738         if (info->attrs[NL80211_ATTR_DURATION]) {
6739                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6740                         return -EINVAL;
6741                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6742
6743                 /*
6744                  * We should wait on the channel for at least a minimum amount
6745                  * of time (10ms) but no longer than the driver supports.
6746                  */
6747                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6748                     wait > rdev->wiphy.max_remain_on_channel_duration)
6749                         return -EINVAL;
6750
6751         }
6752
6753         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6754
6755         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6756                 return -EINVAL;
6757
6758         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6759
6760         err = nl80211_parse_chandef(rdev, info, &chandef);
6761         if (err)
6762                 return err;
6763
6764         if (!dont_wait_for_ack) {
6765                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6766                 if (!msg)
6767                         return -ENOMEM;
6768
6769                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6770                                      NL80211_CMD_FRAME);
6771
6772                 if (IS_ERR(hdr)) {
6773                         err = PTR_ERR(hdr);
6774                         goto free_msg;
6775                 }
6776         }
6777
6778         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6779                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6780                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6781                                     no_cck, dont_wait_for_ack, &cookie);
6782         if (err)
6783                 goto free_msg;
6784
6785         if (msg) {
6786                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6787                         goto nla_put_failure;
6788
6789                 genlmsg_end(msg, hdr);
6790                 return genlmsg_reply(msg, info);
6791         }
6792
6793         return 0;
6794
6795  nla_put_failure:
6796         err = -ENOBUFS;
6797  free_msg:
6798         nlmsg_free(msg);
6799         return err;
6800 }
6801
6802 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6803 {
6804         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6805         struct wireless_dev *wdev = info->user_ptr[1];
6806         u64 cookie;
6807
6808         if (!info->attrs[NL80211_ATTR_COOKIE])
6809                 return -EINVAL;
6810
6811         if (!rdev->ops->mgmt_tx_cancel_wait)
6812                 return -EOPNOTSUPP;
6813
6814         switch (wdev->iftype) {
6815         case NL80211_IFTYPE_STATION:
6816         case NL80211_IFTYPE_ADHOC:
6817         case NL80211_IFTYPE_P2P_CLIENT:
6818         case NL80211_IFTYPE_AP:
6819         case NL80211_IFTYPE_AP_VLAN:
6820         case NL80211_IFTYPE_P2P_GO:
6821         case NL80211_IFTYPE_P2P_DEVICE:
6822                 break;
6823         default:
6824                 return -EOPNOTSUPP;
6825         }
6826
6827         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6828
6829         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6830 }
6831
6832 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6833 {
6834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6835         struct wireless_dev *wdev;
6836         struct net_device *dev = info->user_ptr[1];
6837         u8 ps_state;
6838         bool state;
6839         int err;
6840
6841         if (!info->attrs[NL80211_ATTR_PS_STATE])
6842                 return -EINVAL;
6843
6844         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6845
6846         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6847                 return -EINVAL;
6848
6849         wdev = dev->ieee80211_ptr;
6850
6851         if (!rdev->ops->set_power_mgmt)
6852                 return -EOPNOTSUPP;
6853
6854         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6855
6856         if (state == wdev->ps)
6857                 return 0;
6858
6859         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6860         if (!err)
6861                 wdev->ps = state;
6862         return err;
6863 }
6864
6865 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6866 {
6867         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6868         enum nl80211_ps_state ps_state;
6869         struct wireless_dev *wdev;
6870         struct net_device *dev = info->user_ptr[1];
6871         struct sk_buff *msg;
6872         void *hdr;
6873         int err;
6874
6875         wdev = dev->ieee80211_ptr;
6876
6877         if (!rdev->ops->set_power_mgmt)
6878                 return -EOPNOTSUPP;
6879
6880         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6881         if (!msg)
6882                 return -ENOMEM;
6883
6884         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6885                              NL80211_CMD_GET_POWER_SAVE);
6886         if (!hdr) {
6887                 err = -ENOBUFS;
6888                 goto free_msg;
6889         }
6890
6891         if (wdev->ps)
6892                 ps_state = NL80211_PS_ENABLED;
6893         else
6894                 ps_state = NL80211_PS_DISABLED;
6895
6896         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6897                 goto nla_put_failure;
6898
6899         genlmsg_end(msg, hdr);
6900         return genlmsg_reply(msg, info);
6901
6902  nla_put_failure:
6903         err = -ENOBUFS;
6904  free_msg:
6905         nlmsg_free(msg);
6906         return err;
6907 }
6908
6909 static struct nla_policy
6910 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6911         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6912         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6913         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6914         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6915         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6916         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6917 };
6918
6919 static int nl80211_set_cqm_txe(struct genl_info *info,
6920                                u32 rate, u32 pkts, u32 intvl)
6921 {
6922         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6923         struct wireless_dev *wdev;
6924         struct net_device *dev = info->user_ptr[1];
6925
6926         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6927                 return -EINVAL;
6928
6929         wdev = dev->ieee80211_ptr;
6930
6931         if (!rdev->ops->set_cqm_txe_config)
6932                 return -EOPNOTSUPP;
6933
6934         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6935             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6936                 return -EOPNOTSUPP;
6937
6938         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6939 }
6940
6941 static int nl80211_set_cqm_rssi(struct genl_info *info,
6942                                 s32 threshold, u32 hysteresis)
6943 {
6944         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6945         struct wireless_dev *wdev;
6946         struct net_device *dev = info->user_ptr[1];
6947
6948         if (threshold > 0)
6949                 return -EINVAL;
6950
6951         wdev = dev->ieee80211_ptr;
6952
6953         if (!rdev->ops->set_cqm_rssi_config)
6954                 return -EOPNOTSUPP;
6955
6956         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6957             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6958                 return -EOPNOTSUPP;
6959
6960         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6961 }
6962
6963 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6964 {
6965         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6966         struct nlattr *cqm;
6967         int err;
6968
6969         cqm = info->attrs[NL80211_ATTR_CQM];
6970         if (!cqm) {
6971                 err = -EINVAL;
6972                 goto out;
6973         }
6974
6975         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6976                                nl80211_attr_cqm_policy);
6977         if (err)
6978                 goto out;
6979
6980         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6981             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6982                 s32 threshold;
6983                 u32 hysteresis;
6984                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6985                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6986                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6987         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
6988                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
6989                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
6990                 u32 rate, pkts, intvl;
6991                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
6992                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
6993                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
6994                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
6995         } else
6996                 err = -EINVAL;
6997
6998 out:
6999         return err;
7000 }
7001
7002 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7003 {
7004         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7005         struct net_device *dev = info->user_ptr[1];
7006         struct mesh_config cfg;
7007         struct mesh_setup setup;
7008         int err;
7009
7010         /* start with default */
7011         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7012         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7013
7014         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7015                 /* and parse parameters if given */
7016                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7017                 if (err)
7018                         return err;
7019         }
7020
7021         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7022             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7023                 return -EINVAL;
7024
7025         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7026         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7027
7028         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7029             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7030                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7031                         return -EINVAL;
7032
7033         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7034                 setup.beacon_interval =
7035                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7036                 if (setup.beacon_interval < 10 ||
7037                     setup.beacon_interval > 10000)
7038                         return -EINVAL;
7039         }
7040
7041         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7042                 setup.dtim_period =
7043                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7044                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7045                         return -EINVAL;
7046         }
7047
7048         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7049                 /* parse additional setup parameters if given */
7050                 err = nl80211_parse_mesh_setup(info, &setup);
7051                 if (err)
7052                         return err;
7053         }
7054
7055         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7056                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7057                 if (err)
7058                         return err;
7059         } else {
7060                 /* cfg80211_join_mesh() will sort it out */
7061                 setup.chandef.chan = NULL;
7062         }
7063
7064         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7065 }
7066
7067 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7068 {
7069         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7070         struct net_device *dev = info->user_ptr[1];
7071
7072         return cfg80211_leave_mesh(rdev, dev);
7073 }
7074
7075 #ifdef CONFIG_PM
7076 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7077                                         struct cfg80211_registered_device *rdev)
7078 {
7079         struct nlattr *nl_pats, *nl_pat;
7080         int i, pat_len;
7081
7082         if (!rdev->wowlan->n_patterns)
7083                 return 0;
7084
7085         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7086         if (!nl_pats)
7087                 return -ENOBUFS;
7088
7089         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7090                 nl_pat = nla_nest_start(msg, i + 1);
7091                 if (!nl_pat)
7092                         return -ENOBUFS;
7093                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7094                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7095                             DIV_ROUND_UP(pat_len, 8),
7096                             rdev->wowlan->patterns[i].mask) ||
7097                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7098                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7099                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7100                                 rdev->wowlan->patterns[i].pkt_offset))
7101                         return -ENOBUFS;
7102                 nla_nest_end(msg, nl_pat);
7103         }
7104         nla_nest_end(msg, nl_pats);
7105
7106         return 0;
7107 }
7108
7109 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7110                                    struct cfg80211_wowlan_tcp *tcp)
7111 {
7112         struct nlattr *nl_tcp;
7113
7114         if (!tcp)
7115                 return 0;
7116
7117         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7118         if (!nl_tcp)
7119                 return -ENOBUFS;
7120
7121         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7122             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7123             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7124             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7125             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7126             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7127                     tcp->payload_len, tcp->payload) ||
7128             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7129                         tcp->data_interval) ||
7130             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7131                     tcp->wake_len, tcp->wake_data) ||
7132             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7133                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7134                 return -ENOBUFS;
7135
7136         if (tcp->payload_seq.len &&
7137             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7138                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7139                 return -ENOBUFS;
7140
7141         if (tcp->payload_tok.len &&
7142             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7143                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7144                     &tcp->payload_tok))
7145                 return -ENOBUFS;
7146
7147         return 0;
7148 }
7149
7150 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7151 {
7152         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7153         struct sk_buff *msg;
7154         void *hdr;
7155         u32 size = NLMSG_DEFAULT_SIZE;
7156
7157         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7158             !rdev->wiphy.wowlan.tcp)
7159                 return -EOPNOTSUPP;
7160
7161         if (rdev->wowlan && rdev->wowlan->tcp) {
7162                 /* adjust size to have room for all the data */
7163                 size += rdev->wowlan->tcp->tokens_size +
7164                         rdev->wowlan->tcp->payload_len +
7165                         rdev->wowlan->tcp->wake_len +
7166                         rdev->wowlan->tcp->wake_len / 8;
7167         }
7168
7169         msg = nlmsg_new(size, GFP_KERNEL);
7170         if (!msg)
7171                 return -ENOMEM;
7172
7173         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7174                              NL80211_CMD_GET_WOWLAN);
7175         if (!hdr)
7176                 goto nla_put_failure;
7177
7178         if (rdev->wowlan) {
7179                 struct nlattr *nl_wowlan;
7180
7181                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7182                 if (!nl_wowlan)
7183                         goto nla_put_failure;
7184
7185                 if ((rdev->wowlan->any &&
7186                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7187                     (rdev->wowlan->disconnect &&
7188                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7189                     (rdev->wowlan->magic_pkt &&
7190                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7191                     (rdev->wowlan->gtk_rekey_failure &&
7192                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7193                     (rdev->wowlan->eap_identity_req &&
7194                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7195                     (rdev->wowlan->four_way_handshake &&
7196                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7197                     (rdev->wowlan->rfkill_release &&
7198                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7199                         goto nla_put_failure;
7200
7201                 if (nl80211_send_wowlan_patterns(msg, rdev))
7202                         goto nla_put_failure;
7203
7204                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7205                         goto nla_put_failure;
7206
7207                 nla_nest_end(msg, nl_wowlan);
7208         }
7209
7210         genlmsg_end(msg, hdr);
7211         return genlmsg_reply(msg, info);
7212
7213 nla_put_failure:
7214         nlmsg_free(msg);
7215         return -ENOBUFS;
7216 }
7217
7218 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7219                                     struct nlattr *attr,
7220                                     struct cfg80211_wowlan *trig)
7221 {
7222         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7223         struct cfg80211_wowlan_tcp *cfg;
7224         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7225         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7226         u32 size;
7227         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7228         int err, port;
7229
7230         if (!rdev->wiphy.wowlan.tcp)
7231                 return -EINVAL;
7232
7233         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7234                         nla_data(attr), nla_len(attr),
7235                         nl80211_wowlan_tcp_policy);
7236         if (err)
7237                 return err;
7238
7239         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7240             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7241             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7242             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7243             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7244             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7245             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7246             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7247                 return -EINVAL;
7248
7249         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7250         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7251                 return -EINVAL;
7252
7253         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7254                         rdev->wiphy.wowlan.tcp->data_interval_max)
7255                 return -EINVAL;
7256
7257         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7258         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7259                 return -EINVAL;
7260
7261         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7262         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7263                 return -EINVAL;
7264
7265         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7266                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7267
7268                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7269                 tokens_size = tokln - sizeof(*tok);
7270
7271                 if (!tok->len || tokens_size % tok->len)
7272                         return -EINVAL;
7273                 if (!rdev->wiphy.wowlan.tcp->tok)
7274                         return -EINVAL;
7275                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7276                         return -EINVAL;
7277                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7278                         return -EINVAL;
7279                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7280                         return -EINVAL;
7281                 if (tok->offset + tok->len > data_size)
7282                         return -EINVAL;
7283         }
7284
7285         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7286                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7287                 if (!rdev->wiphy.wowlan.tcp->seq)
7288                         return -EINVAL;
7289                 if (seq->len == 0 || seq->len > 4)
7290                         return -EINVAL;
7291                 if (seq->len + seq->offset > data_size)
7292                         return -EINVAL;
7293         }
7294
7295         size = sizeof(*cfg);
7296         size += data_size;
7297         size += wake_size + wake_mask_size;
7298         size += tokens_size;
7299
7300         cfg = kzalloc(size, GFP_KERNEL);
7301         if (!cfg)
7302                 return -ENOMEM;
7303         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7304         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7305         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7306                ETH_ALEN);
7307         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7308                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7309         else
7310                 port = 0;
7311 #ifdef CONFIG_INET
7312         /* allocate a socket and port for it and use it */
7313         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7314                             IPPROTO_TCP, &cfg->sock, 1);
7315         if (err) {
7316                 kfree(cfg);
7317                 return err;
7318         }
7319         if (inet_csk_get_port(cfg->sock->sk, port)) {
7320                 sock_release(cfg->sock);
7321                 kfree(cfg);
7322                 return -EADDRINUSE;
7323         }
7324         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7325 #else
7326         if (!port) {
7327                 kfree(cfg);
7328                 return -EINVAL;
7329         }
7330         cfg->src_port = port;
7331 #endif
7332
7333         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7334         cfg->payload_len = data_size;
7335         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7336         memcpy((void *)cfg->payload,
7337                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7338                data_size);
7339         if (seq)
7340                 cfg->payload_seq = *seq;
7341         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7342         cfg->wake_len = wake_size;
7343         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7344         memcpy((void *)cfg->wake_data,
7345                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7346                wake_size);
7347         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7348                          data_size + wake_size;
7349         memcpy((void *)cfg->wake_mask,
7350                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7351                wake_mask_size);
7352         if (tok) {
7353                 cfg->tokens_size = tokens_size;
7354                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7355         }
7356
7357         trig->tcp = cfg;
7358
7359         return 0;
7360 }
7361
7362 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7363 {
7364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7365         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7366         struct cfg80211_wowlan new_triggers = {};
7367         struct cfg80211_wowlan *ntrig;
7368         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7369         int err, i;
7370         bool prev_enabled = rdev->wowlan;
7371
7372         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7373             !rdev->wiphy.wowlan.tcp)
7374                 return -EOPNOTSUPP;
7375
7376         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7377                 cfg80211_rdev_free_wowlan(rdev);
7378                 rdev->wowlan = NULL;
7379                 goto set_wakeup;
7380         }
7381
7382         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7383                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7384                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7385                         nl80211_wowlan_policy);
7386         if (err)
7387                 return err;
7388
7389         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7390                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7391                         return -EINVAL;
7392                 new_triggers.any = true;
7393         }
7394
7395         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7396                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7397                         return -EINVAL;
7398                 new_triggers.disconnect = true;
7399         }
7400
7401         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7402                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7403                         return -EINVAL;
7404                 new_triggers.magic_pkt = true;
7405         }
7406
7407         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7408                 return -EINVAL;
7409
7410         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7411                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7412                         return -EINVAL;
7413                 new_triggers.gtk_rekey_failure = true;
7414         }
7415
7416         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7417                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7418                         return -EINVAL;
7419                 new_triggers.eap_identity_req = true;
7420         }
7421
7422         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7423                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7424                         return -EINVAL;
7425                 new_triggers.four_way_handshake = true;
7426         }
7427
7428         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7429                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7430                         return -EINVAL;
7431                 new_triggers.rfkill_release = true;
7432         }
7433
7434         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7435                 struct nlattr *pat;
7436                 int n_patterns = 0;
7437                 int rem, pat_len, mask_len, pkt_offset;
7438                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7439
7440                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7441                                     rem)
7442                         n_patterns++;
7443                 if (n_patterns > wowlan->n_patterns)
7444                         return -EINVAL;
7445
7446                 new_triggers.patterns = kcalloc(n_patterns,
7447                                                 sizeof(new_triggers.patterns[0]),
7448                                                 GFP_KERNEL);
7449                 if (!new_triggers.patterns)
7450                         return -ENOMEM;
7451
7452                 new_triggers.n_patterns = n_patterns;
7453                 i = 0;
7454
7455                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7456                                     rem) {
7457                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7458                                   nla_data(pat), nla_len(pat), NULL);
7459                         err = -EINVAL;
7460                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7461                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7462                                 goto error;
7463                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7464                         mask_len = DIV_ROUND_UP(pat_len, 8);
7465                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7466                             mask_len)
7467                                 goto error;
7468                         if (pat_len > wowlan->pattern_max_len ||
7469                             pat_len < wowlan->pattern_min_len)
7470                                 goto error;
7471
7472                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7473                                 pkt_offset = 0;
7474                         else
7475                                 pkt_offset = nla_get_u32(
7476                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7477                         if (pkt_offset > wowlan->max_pkt_offset)
7478                                 goto error;
7479                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7480
7481                         new_triggers.patterns[i].mask =
7482                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7483                         if (!new_triggers.patterns[i].mask) {
7484                                 err = -ENOMEM;
7485                                 goto error;
7486                         }
7487                         new_triggers.patterns[i].pattern =
7488                                 new_triggers.patterns[i].mask + mask_len;
7489                         memcpy(new_triggers.patterns[i].mask,
7490                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7491                                mask_len);
7492                         new_triggers.patterns[i].pattern_len = pat_len;
7493                         memcpy(new_triggers.patterns[i].pattern,
7494                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7495                                pat_len);
7496                         i++;
7497                 }
7498         }
7499
7500         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7501                 err = nl80211_parse_wowlan_tcp(
7502                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7503                         &new_triggers);
7504                 if (err)
7505                         goto error;
7506         }
7507
7508         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7509         if (!ntrig) {
7510                 err = -ENOMEM;
7511                 goto error;
7512         }
7513         cfg80211_rdev_free_wowlan(rdev);
7514         rdev->wowlan = ntrig;
7515
7516  set_wakeup:
7517         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7518                 rdev_set_wakeup(rdev, rdev->wowlan);
7519
7520         return 0;
7521  error:
7522         for (i = 0; i < new_triggers.n_patterns; i++)
7523                 kfree(new_triggers.patterns[i].mask);
7524         kfree(new_triggers.patterns);
7525         if (new_triggers.tcp && new_triggers.tcp->sock)
7526                 sock_release(new_triggers.tcp->sock);
7527         kfree(new_triggers.tcp);
7528         return err;
7529 }
7530 #endif
7531
7532 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7533 {
7534         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7535         struct net_device *dev = info->user_ptr[1];
7536         struct wireless_dev *wdev = dev->ieee80211_ptr;
7537         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7538         struct cfg80211_gtk_rekey_data rekey_data;
7539         int err;
7540
7541         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7542                 return -EINVAL;
7543
7544         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7545                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7546                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7547                         nl80211_rekey_policy);
7548         if (err)
7549                 return err;
7550
7551         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7552                 return -ERANGE;
7553         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7554                 return -ERANGE;
7555         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7556                 return -ERANGE;
7557
7558         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7559                NL80211_KEK_LEN);
7560         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7561                NL80211_KCK_LEN);
7562         memcpy(rekey_data.replay_ctr,
7563                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7564                NL80211_REPLAY_CTR_LEN);
7565
7566         wdev_lock(wdev);
7567         if (!wdev->current_bss) {
7568                 err = -ENOTCONN;
7569                 goto out;
7570         }
7571
7572         if (!rdev->ops->set_rekey_data) {
7573                 err = -EOPNOTSUPP;
7574                 goto out;
7575         }
7576
7577         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7578  out:
7579         wdev_unlock(wdev);
7580         return err;
7581 }
7582
7583 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
7584                                              struct genl_info *info)
7585 {
7586         struct net_device *dev = info->user_ptr[1];
7587         struct wireless_dev *wdev = dev->ieee80211_ptr;
7588
7589         if (wdev->iftype != NL80211_IFTYPE_AP &&
7590             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7591                 return -EINVAL;
7592
7593         if (wdev->ap_unexpected_nlportid)
7594                 return -EBUSY;
7595
7596         wdev->ap_unexpected_nlportid = info->snd_portid;
7597         return 0;
7598 }
7599
7600 static int nl80211_probe_client(struct sk_buff *skb,
7601                                 struct genl_info *info)
7602 {
7603         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7604         struct net_device *dev = info->user_ptr[1];
7605         struct wireless_dev *wdev = dev->ieee80211_ptr;
7606         struct sk_buff *msg;
7607         void *hdr;
7608         const u8 *addr;
7609         u64 cookie;
7610         int err;
7611
7612         if (wdev->iftype != NL80211_IFTYPE_AP &&
7613             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7614                 return -EOPNOTSUPP;
7615
7616         if (!info->attrs[NL80211_ATTR_MAC])
7617                 return -EINVAL;
7618
7619         if (!rdev->ops->probe_client)
7620                 return -EOPNOTSUPP;
7621
7622         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7623         if (!msg)
7624                 return -ENOMEM;
7625
7626         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7627                              NL80211_CMD_PROBE_CLIENT);
7628
7629         if (IS_ERR(hdr)) {
7630                 err = PTR_ERR(hdr);
7631                 goto free_msg;
7632         }
7633
7634         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7635
7636         err = rdev_probe_client(rdev, dev, addr, &cookie);
7637         if (err)
7638                 goto free_msg;
7639
7640         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7641                 goto nla_put_failure;
7642
7643         genlmsg_end(msg, hdr);
7644
7645         return genlmsg_reply(msg, info);
7646
7647  nla_put_failure:
7648         err = -ENOBUFS;
7649  free_msg:
7650         nlmsg_free(msg);
7651         return err;
7652 }
7653
7654 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7655 {
7656         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7657         struct cfg80211_beacon_registration *reg, *nreg;
7658         int rv;
7659
7660         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7661                 return -EOPNOTSUPP;
7662
7663         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7664         if (!nreg)
7665                 return -ENOMEM;
7666
7667         /* First, check if already registered. */
7668         spin_lock_bh(&rdev->beacon_registrations_lock);
7669         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7670                 if (reg->nlportid == info->snd_portid) {
7671                         rv = -EALREADY;
7672                         goto out_err;
7673                 }
7674         }
7675         /* Add it to the list */
7676         nreg->nlportid = info->snd_portid;
7677         list_add(&nreg->list, &rdev->beacon_registrations);
7678
7679         spin_unlock_bh(&rdev->beacon_registrations_lock);
7680
7681         return 0;
7682 out_err:
7683         spin_unlock_bh(&rdev->beacon_registrations_lock);
7684         kfree(nreg);
7685         return rv;
7686 }
7687
7688 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7689 {
7690         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7691         struct wireless_dev *wdev = info->user_ptr[1];
7692         int err;
7693
7694         if (!rdev->ops->start_p2p_device)
7695                 return -EOPNOTSUPP;
7696
7697         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7698                 return -EOPNOTSUPP;
7699
7700         if (wdev->p2p_started)
7701                 return 0;
7702
7703         mutex_lock(&rdev->devlist_mtx);
7704         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7705         mutex_unlock(&rdev->devlist_mtx);
7706         if (err)
7707                 return err;
7708
7709         err = rdev_start_p2p_device(rdev, wdev);
7710         if (err)
7711                 return err;
7712
7713         wdev->p2p_started = true;
7714         mutex_lock(&rdev->devlist_mtx);
7715         rdev->opencount++;
7716         mutex_unlock(&rdev->devlist_mtx);
7717
7718         return 0;
7719 }
7720
7721 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7722 {
7723         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7724         struct wireless_dev *wdev = info->user_ptr[1];
7725
7726         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7727                 return -EOPNOTSUPP;
7728
7729         if (!rdev->ops->stop_p2p_device)
7730                 return -EOPNOTSUPP;
7731
7732         if (!wdev->p2p_started)
7733                 return 0;
7734
7735         rdev_stop_p2p_device(rdev, wdev);
7736         wdev->p2p_started = false;
7737
7738         mutex_lock(&rdev->devlist_mtx);
7739         rdev->opencount--;
7740         mutex_unlock(&rdev->devlist_mtx);
7741
7742         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7743                 rdev->scan_req->aborted = true;
7744                 ___cfg80211_scan_done(rdev, true);
7745         }
7746
7747         return 0;
7748 }
7749
7750 #define NL80211_FLAG_NEED_WIPHY         0x01
7751 #define NL80211_FLAG_NEED_NETDEV        0x02
7752 #define NL80211_FLAG_NEED_RTNL          0x04
7753 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7754 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7755                                          NL80211_FLAG_CHECK_NETDEV_UP)
7756 #define NL80211_FLAG_NEED_WDEV          0x10
7757 /* If a netdev is associated, it must be UP, P2P must be started */
7758 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7759                                          NL80211_FLAG_CHECK_NETDEV_UP)
7760
7761 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7762                             struct genl_info *info)
7763 {
7764         struct cfg80211_registered_device *rdev;
7765         struct wireless_dev *wdev;
7766         struct net_device *dev;
7767         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7768
7769         if (rtnl)
7770                 rtnl_lock();
7771
7772         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7773                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7774                 if (IS_ERR(rdev)) {
7775                         if (rtnl)
7776                                 rtnl_unlock();
7777                         return PTR_ERR(rdev);
7778                 }
7779                 info->user_ptr[0] = rdev;
7780         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7781                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7782                 mutex_lock(&cfg80211_mutex);
7783                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7784                                                   info->attrs);
7785                 if (IS_ERR(wdev)) {
7786                         mutex_unlock(&cfg80211_mutex);
7787                         if (rtnl)
7788                                 rtnl_unlock();
7789                         return PTR_ERR(wdev);
7790                 }
7791
7792                 dev = wdev->netdev;
7793                 rdev = wiphy_to_dev(wdev->wiphy);
7794
7795                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7796                         if (!dev) {
7797                                 mutex_unlock(&cfg80211_mutex);
7798                                 if (rtnl)
7799                                         rtnl_unlock();
7800                                 return -EINVAL;
7801                         }
7802
7803                         info->user_ptr[1] = dev;
7804                 } else {
7805                         info->user_ptr[1] = wdev;
7806                 }
7807
7808                 if (dev) {
7809                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7810                             !netif_running(dev)) {
7811                                 mutex_unlock(&cfg80211_mutex);
7812                                 if (rtnl)
7813                                         rtnl_unlock();
7814                                 return -ENETDOWN;
7815                         }
7816
7817                         dev_hold(dev);
7818                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7819                         if (!wdev->p2p_started) {
7820                                 mutex_unlock(&cfg80211_mutex);
7821                                 if (rtnl)
7822                                         rtnl_unlock();
7823                                 return -ENETDOWN;
7824                         }
7825                 }
7826
7827                 cfg80211_lock_rdev(rdev);
7828
7829                 mutex_unlock(&cfg80211_mutex);
7830
7831                 info->user_ptr[0] = rdev;
7832         }
7833
7834         return 0;
7835 }
7836
7837 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7838                               struct genl_info *info)
7839 {
7840         if (info->user_ptr[0])
7841                 cfg80211_unlock_rdev(info->user_ptr[0]);
7842         if (info->user_ptr[1]) {
7843                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7844                         struct wireless_dev *wdev = info->user_ptr[1];
7845
7846                         if (wdev->netdev)
7847                                 dev_put(wdev->netdev);
7848                 } else {
7849                         dev_put(info->user_ptr[1]);
7850                 }
7851         }
7852         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7853                 rtnl_unlock();
7854 }
7855
7856 static struct genl_ops nl80211_ops[] = {
7857         {
7858                 .cmd = NL80211_CMD_GET_WIPHY,
7859                 .doit = nl80211_get_wiphy,
7860                 .dumpit = nl80211_dump_wiphy,
7861                 .policy = nl80211_policy,
7862                 /* can be retrieved by unprivileged users */
7863                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7864         },
7865         {
7866                 .cmd = NL80211_CMD_SET_WIPHY,
7867                 .doit = nl80211_set_wiphy,
7868                 .policy = nl80211_policy,
7869                 .flags = GENL_ADMIN_PERM,
7870                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7871         },
7872         {
7873                 .cmd = NL80211_CMD_GET_INTERFACE,
7874                 .doit = nl80211_get_interface,
7875                 .dumpit = nl80211_dump_interface,
7876                 .policy = nl80211_policy,
7877                 /* can be retrieved by unprivileged users */
7878                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7879         },
7880         {
7881                 .cmd = NL80211_CMD_SET_INTERFACE,
7882                 .doit = nl80211_set_interface,
7883                 .policy = nl80211_policy,
7884                 .flags = GENL_ADMIN_PERM,
7885                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7886                                   NL80211_FLAG_NEED_RTNL,
7887         },
7888         {
7889                 .cmd = NL80211_CMD_NEW_INTERFACE,
7890                 .doit = nl80211_new_interface,
7891                 .policy = nl80211_policy,
7892                 .flags = GENL_ADMIN_PERM,
7893                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7894                                   NL80211_FLAG_NEED_RTNL,
7895         },
7896         {
7897                 .cmd = NL80211_CMD_DEL_INTERFACE,
7898                 .doit = nl80211_del_interface,
7899                 .policy = nl80211_policy,
7900                 .flags = GENL_ADMIN_PERM,
7901                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7902                                   NL80211_FLAG_NEED_RTNL,
7903         },
7904         {
7905                 .cmd = NL80211_CMD_GET_KEY,
7906                 .doit = nl80211_get_key,
7907                 .policy = nl80211_policy,
7908                 .flags = GENL_ADMIN_PERM,
7909                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7910                                   NL80211_FLAG_NEED_RTNL,
7911         },
7912         {
7913                 .cmd = NL80211_CMD_SET_KEY,
7914                 .doit = nl80211_set_key,
7915                 .policy = nl80211_policy,
7916                 .flags = GENL_ADMIN_PERM,
7917                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7918                                   NL80211_FLAG_NEED_RTNL,
7919         },
7920         {
7921                 .cmd = NL80211_CMD_NEW_KEY,
7922                 .doit = nl80211_new_key,
7923                 .policy = nl80211_policy,
7924                 .flags = GENL_ADMIN_PERM,
7925                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7926                                   NL80211_FLAG_NEED_RTNL,
7927         },
7928         {
7929                 .cmd = NL80211_CMD_DEL_KEY,
7930                 .doit = nl80211_del_key,
7931                 .policy = nl80211_policy,
7932                 .flags = GENL_ADMIN_PERM,
7933                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7934                                   NL80211_FLAG_NEED_RTNL,
7935         },
7936         {
7937                 .cmd = NL80211_CMD_SET_BEACON,
7938                 .policy = nl80211_policy,
7939                 .flags = GENL_ADMIN_PERM,
7940                 .doit = nl80211_set_beacon,
7941                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7942                                   NL80211_FLAG_NEED_RTNL,
7943         },
7944         {
7945                 .cmd = NL80211_CMD_START_AP,
7946                 .policy = nl80211_policy,
7947                 .flags = GENL_ADMIN_PERM,
7948                 .doit = nl80211_start_ap,
7949                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7950                                   NL80211_FLAG_NEED_RTNL,
7951         },
7952         {
7953                 .cmd = NL80211_CMD_STOP_AP,
7954                 .policy = nl80211_policy,
7955                 .flags = GENL_ADMIN_PERM,
7956                 .doit = nl80211_stop_ap,
7957                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7958                                   NL80211_FLAG_NEED_RTNL,
7959         },
7960         {
7961                 .cmd = NL80211_CMD_GET_STATION,
7962                 .doit = nl80211_get_station,
7963                 .dumpit = nl80211_dump_station,
7964                 .policy = nl80211_policy,
7965                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7966                                   NL80211_FLAG_NEED_RTNL,
7967         },
7968         {
7969                 .cmd = NL80211_CMD_SET_STATION,
7970                 .doit = nl80211_set_station,
7971                 .policy = nl80211_policy,
7972                 .flags = GENL_ADMIN_PERM,
7973                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7974                                   NL80211_FLAG_NEED_RTNL,
7975         },
7976         {
7977                 .cmd = NL80211_CMD_NEW_STATION,
7978                 .doit = nl80211_new_station,
7979                 .policy = nl80211_policy,
7980                 .flags = GENL_ADMIN_PERM,
7981                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7982                                   NL80211_FLAG_NEED_RTNL,
7983         },
7984         {
7985                 .cmd = NL80211_CMD_DEL_STATION,
7986                 .doit = nl80211_del_station,
7987                 .policy = nl80211_policy,
7988                 .flags = GENL_ADMIN_PERM,
7989                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7990                                   NL80211_FLAG_NEED_RTNL,
7991         },
7992         {
7993                 .cmd = NL80211_CMD_GET_MPATH,
7994                 .doit = nl80211_get_mpath,
7995                 .dumpit = nl80211_dump_mpath,
7996                 .policy = nl80211_policy,
7997                 .flags = GENL_ADMIN_PERM,
7998                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7999                                   NL80211_FLAG_NEED_RTNL,
8000         },
8001         {
8002                 .cmd = NL80211_CMD_SET_MPATH,
8003                 .doit = nl80211_set_mpath,
8004                 .policy = nl80211_policy,
8005                 .flags = GENL_ADMIN_PERM,
8006                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8007                                   NL80211_FLAG_NEED_RTNL,
8008         },
8009         {
8010                 .cmd = NL80211_CMD_NEW_MPATH,
8011                 .doit = nl80211_new_mpath,
8012                 .policy = nl80211_policy,
8013                 .flags = GENL_ADMIN_PERM,
8014                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8015                                   NL80211_FLAG_NEED_RTNL,
8016         },
8017         {
8018                 .cmd = NL80211_CMD_DEL_MPATH,
8019                 .doit = nl80211_del_mpath,
8020                 .policy = nl80211_policy,
8021                 .flags = GENL_ADMIN_PERM,
8022                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8023                                   NL80211_FLAG_NEED_RTNL,
8024         },
8025         {
8026                 .cmd = NL80211_CMD_SET_BSS,
8027                 .doit = nl80211_set_bss,
8028                 .policy = nl80211_policy,
8029                 .flags = GENL_ADMIN_PERM,
8030                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8031                                   NL80211_FLAG_NEED_RTNL,
8032         },
8033         {
8034                 .cmd = NL80211_CMD_GET_REG,
8035                 .doit = nl80211_get_reg,
8036                 .policy = nl80211_policy,
8037                 /* can be retrieved by unprivileged users */
8038         },
8039         {
8040                 .cmd = NL80211_CMD_SET_REG,
8041                 .doit = nl80211_set_reg,
8042                 .policy = nl80211_policy,
8043                 .flags = GENL_ADMIN_PERM,
8044         },
8045         {
8046                 .cmd = NL80211_CMD_REQ_SET_REG,
8047                 .doit = nl80211_req_set_reg,
8048                 .policy = nl80211_policy,
8049                 .flags = GENL_ADMIN_PERM,
8050         },
8051         {
8052                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8053                 .doit = nl80211_get_mesh_config,
8054                 .policy = nl80211_policy,
8055                 /* can be retrieved by unprivileged users */
8056                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8057                                   NL80211_FLAG_NEED_RTNL,
8058         },
8059         {
8060                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8061                 .doit = nl80211_update_mesh_config,
8062                 .policy = nl80211_policy,
8063                 .flags = GENL_ADMIN_PERM,
8064                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8065                                   NL80211_FLAG_NEED_RTNL,
8066         },
8067         {
8068                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8069                 .doit = nl80211_trigger_scan,
8070                 .policy = nl80211_policy,
8071                 .flags = GENL_ADMIN_PERM,
8072                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8073                                   NL80211_FLAG_NEED_RTNL,
8074         },
8075         {
8076                 .cmd = NL80211_CMD_GET_SCAN,
8077                 .policy = nl80211_policy,
8078                 .dumpit = nl80211_dump_scan,
8079         },
8080         {
8081                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8082                 .doit = nl80211_start_sched_scan,
8083                 .policy = nl80211_policy,
8084                 .flags = GENL_ADMIN_PERM,
8085                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8086                                   NL80211_FLAG_NEED_RTNL,
8087         },
8088         {
8089                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8090                 .doit = nl80211_stop_sched_scan,
8091                 .policy = nl80211_policy,
8092                 .flags = GENL_ADMIN_PERM,
8093                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8094                                   NL80211_FLAG_NEED_RTNL,
8095         },
8096         {
8097                 .cmd = NL80211_CMD_AUTHENTICATE,
8098                 .doit = nl80211_authenticate,
8099                 .policy = nl80211_policy,
8100                 .flags = GENL_ADMIN_PERM,
8101                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8102                                   NL80211_FLAG_NEED_RTNL,
8103         },
8104         {
8105                 .cmd = NL80211_CMD_ASSOCIATE,
8106                 .doit = nl80211_associate,
8107                 .policy = nl80211_policy,
8108                 .flags = GENL_ADMIN_PERM,
8109                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8110                                   NL80211_FLAG_NEED_RTNL,
8111         },
8112         {
8113                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8114                 .doit = nl80211_deauthenticate,
8115                 .policy = nl80211_policy,
8116                 .flags = GENL_ADMIN_PERM,
8117                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8118                                   NL80211_FLAG_NEED_RTNL,
8119         },
8120         {
8121                 .cmd = NL80211_CMD_DISASSOCIATE,
8122                 .doit = nl80211_disassociate,
8123                 .policy = nl80211_policy,
8124                 .flags = GENL_ADMIN_PERM,
8125                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8126                                   NL80211_FLAG_NEED_RTNL,
8127         },
8128         {
8129                 .cmd = NL80211_CMD_JOIN_IBSS,
8130                 .doit = nl80211_join_ibss,
8131                 .policy = nl80211_policy,
8132                 .flags = GENL_ADMIN_PERM,
8133                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8134                                   NL80211_FLAG_NEED_RTNL,
8135         },
8136         {
8137                 .cmd = NL80211_CMD_LEAVE_IBSS,
8138                 .doit = nl80211_leave_ibss,
8139                 .policy = nl80211_policy,
8140                 .flags = GENL_ADMIN_PERM,
8141                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8142                                   NL80211_FLAG_NEED_RTNL,
8143         },
8144 #ifdef CONFIG_NL80211_TESTMODE
8145         {
8146                 .cmd = NL80211_CMD_TESTMODE,
8147                 .doit = nl80211_testmode_do,
8148                 .dumpit = nl80211_testmode_dump,
8149                 .policy = nl80211_policy,
8150                 .flags = GENL_ADMIN_PERM,
8151                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8152                                   NL80211_FLAG_NEED_RTNL,
8153         },
8154 #endif
8155         {
8156                 .cmd = NL80211_CMD_CONNECT,
8157                 .doit = nl80211_connect,
8158                 .policy = nl80211_policy,
8159                 .flags = GENL_ADMIN_PERM,
8160                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8161                                   NL80211_FLAG_NEED_RTNL,
8162         },
8163         {
8164                 .cmd = NL80211_CMD_DISCONNECT,
8165                 .doit = nl80211_disconnect,
8166                 .policy = nl80211_policy,
8167                 .flags = GENL_ADMIN_PERM,
8168                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8169                                   NL80211_FLAG_NEED_RTNL,
8170         },
8171         {
8172                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8173                 .doit = nl80211_wiphy_netns,
8174                 .policy = nl80211_policy,
8175                 .flags = GENL_ADMIN_PERM,
8176                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8177                                   NL80211_FLAG_NEED_RTNL,
8178         },
8179         {
8180                 .cmd = NL80211_CMD_GET_SURVEY,
8181                 .policy = nl80211_policy,
8182                 .dumpit = nl80211_dump_survey,
8183         },
8184         {
8185                 .cmd = NL80211_CMD_SET_PMKSA,
8186                 .doit = nl80211_setdel_pmksa,
8187                 .policy = nl80211_policy,
8188                 .flags = GENL_ADMIN_PERM,
8189                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8190                                   NL80211_FLAG_NEED_RTNL,
8191         },
8192         {
8193                 .cmd = NL80211_CMD_DEL_PMKSA,
8194                 .doit = nl80211_setdel_pmksa,
8195                 .policy = nl80211_policy,
8196                 .flags = GENL_ADMIN_PERM,
8197                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8198                                   NL80211_FLAG_NEED_RTNL,
8199         },
8200         {
8201                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8202                 .doit = nl80211_flush_pmksa,
8203                 .policy = nl80211_policy,
8204                 .flags = GENL_ADMIN_PERM,
8205                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8206                                   NL80211_FLAG_NEED_RTNL,
8207         },
8208         {
8209                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8210                 .doit = nl80211_remain_on_channel,
8211                 .policy = nl80211_policy,
8212                 .flags = GENL_ADMIN_PERM,
8213                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8214                                   NL80211_FLAG_NEED_RTNL,
8215         },
8216         {
8217                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8218                 .doit = nl80211_cancel_remain_on_channel,
8219                 .policy = nl80211_policy,
8220                 .flags = GENL_ADMIN_PERM,
8221                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8222                                   NL80211_FLAG_NEED_RTNL,
8223         },
8224         {
8225                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8226                 .doit = nl80211_set_tx_bitrate_mask,
8227                 .policy = nl80211_policy,
8228                 .flags = GENL_ADMIN_PERM,
8229                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8230                                   NL80211_FLAG_NEED_RTNL,
8231         },
8232         {
8233                 .cmd = NL80211_CMD_REGISTER_FRAME,
8234                 .doit = nl80211_register_mgmt,
8235                 .policy = nl80211_policy,
8236                 .flags = GENL_ADMIN_PERM,
8237                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8238                                   NL80211_FLAG_NEED_RTNL,
8239         },
8240         {
8241                 .cmd = NL80211_CMD_FRAME,
8242                 .doit = nl80211_tx_mgmt,
8243                 .policy = nl80211_policy,
8244                 .flags = GENL_ADMIN_PERM,
8245                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8246                                   NL80211_FLAG_NEED_RTNL,
8247         },
8248         {
8249                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8250                 .doit = nl80211_tx_mgmt_cancel_wait,
8251                 .policy = nl80211_policy,
8252                 .flags = GENL_ADMIN_PERM,
8253                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8254                                   NL80211_FLAG_NEED_RTNL,
8255         },
8256         {
8257                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8258                 .doit = nl80211_set_power_save,
8259                 .policy = nl80211_policy,
8260                 .flags = GENL_ADMIN_PERM,
8261                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8262                                   NL80211_FLAG_NEED_RTNL,
8263         },
8264         {
8265                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8266                 .doit = nl80211_get_power_save,
8267                 .policy = nl80211_policy,
8268                 /* can be retrieved by unprivileged users */
8269                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8270                                   NL80211_FLAG_NEED_RTNL,
8271         },
8272         {
8273                 .cmd = NL80211_CMD_SET_CQM,
8274                 .doit = nl80211_set_cqm,
8275                 .policy = nl80211_policy,
8276                 .flags = GENL_ADMIN_PERM,
8277                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8278                                   NL80211_FLAG_NEED_RTNL,
8279         },
8280         {
8281                 .cmd = NL80211_CMD_SET_CHANNEL,
8282                 .doit = nl80211_set_channel,
8283                 .policy = nl80211_policy,
8284                 .flags = GENL_ADMIN_PERM,
8285                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8286                                   NL80211_FLAG_NEED_RTNL,
8287         },
8288         {
8289                 .cmd = NL80211_CMD_SET_WDS_PEER,
8290                 .doit = nl80211_set_wds_peer,
8291                 .policy = nl80211_policy,
8292                 .flags = GENL_ADMIN_PERM,
8293                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8294                                   NL80211_FLAG_NEED_RTNL,
8295         },
8296         {
8297                 .cmd = NL80211_CMD_JOIN_MESH,
8298                 .doit = nl80211_join_mesh,
8299                 .policy = nl80211_policy,
8300                 .flags = GENL_ADMIN_PERM,
8301                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8302                                   NL80211_FLAG_NEED_RTNL,
8303         },
8304         {
8305                 .cmd = NL80211_CMD_LEAVE_MESH,
8306                 .doit = nl80211_leave_mesh,
8307                 .policy = nl80211_policy,
8308                 .flags = GENL_ADMIN_PERM,
8309                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8310                                   NL80211_FLAG_NEED_RTNL,
8311         },
8312 #ifdef CONFIG_PM
8313         {
8314                 .cmd = NL80211_CMD_GET_WOWLAN,
8315                 .doit = nl80211_get_wowlan,
8316                 .policy = nl80211_policy,
8317                 /* can be retrieved by unprivileged users */
8318                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8319                                   NL80211_FLAG_NEED_RTNL,
8320         },
8321         {
8322                 .cmd = NL80211_CMD_SET_WOWLAN,
8323                 .doit = nl80211_set_wowlan,
8324                 .policy = nl80211_policy,
8325                 .flags = GENL_ADMIN_PERM,
8326                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8327                                   NL80211_FLAG_NEED_RTNL,
8328         },
8329 #endif
8330         {
8331                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8332                 .doit = nl80211_set_rekey_data,
8333                 .policy = nl80211_policy,
8334                 .flags = GENL_ADMIN_PERM,
8335                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8336                                   NL80211_FLAG_NEED_RTNL,
8337         },
8338         {
8339                 .cmd = NL80211_CMD_TDLS_MGMT,
8340                 .doit = nl80211_tdls_mgmt,
8341                 .policy = nl80211_policy,
8342                 .flags = GENL_ADMIN_PERM,
8343                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8344                                   NL80211_FLAG_NEED_RTNL,
8345         },
8346         {
8347                 .cmd = NL80211_CMD_TDLS_OPER,
8348                 .doit = nl80211_tdls_oper,
8349                 .policy = nl80211_policy,
8350                 .flags = GENL_ADMIN_PERM,
8351                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8352                                   NL80211_FLAG_NEED_RTNL,
8353         },
8354         {
8355                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8356                 .doit = nl80211_register_unexpected_frame,
8357                 .policy = nl80211_policy,
8358                 .flags = GENL_ADMIN_PERM,
8359                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8360                                   NL80211_FLAG_NEED_RTNL,
8361         },
8362         {
8363                 .cmd = NL80211_CMD_PROBE_CLIENT,
8364                 .doit = nl80211_probe_client,
8365                 .policy = nl80211_policy,
8366                 .flags = GENL_ADMIN_PERM,
8367                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8368                                   NL80211_FLAG_NEED_RTNL,
8369         },
8370         {
8371                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8372                 .doit = nl80211_register_beacons,
8373                 .policy = nl80211_policy,
8374                 .flags = GENL_ADMIN_PERM,
8375                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8376                                   NL80211_FLAG_NEED_RTNL,
8377         },
8378         {
8379                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8380                 .doit = nl80211_set_noack_map,
8381                 .policy = nl80211_policy,
8382                 .flags = GENL_ADMIN_PERM,
8383                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8384                                   NL80211_FLAG_NEED_RTNL,
8385         },
8386         {
8387                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8388                 .doit = nl80211_start_p2p_device,
8389                 .policy = nl80211_policy,
8390                 .flags = GENL_ADMIN_PERM,
8391                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8392                                   NL80211_FLAG_NEED_RTNL,
8393         },
8394         {
8395                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8396                 .doit = nl80211_stop_p2p_device,
8397                 .policy = nl80211_policy,
8398                 .flags = GENL_ADMIN_PERM,
8399                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8400                                   NL80211_FLAG_NEED_RTNL,
8401         },
8402         {
8403                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8404                 .doit = nl80211_set_mcast_rate,
8405                 .policy = nl80211_policy,
8406                 .flags = GENL_ADMIN_PERM,
8407                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8408                                   NL80211_FLAG_NEED_RTNL,
8409         },
8410         {
8411                 .cmd = NL80211_CMD_SET_MAC_ACL,
8412                 .doit = nl80211_set_mac_acl,
8413                 .policy = nl80211_policy,
8414                 .flags = GENL_ADMIN_PERM,
8415                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8416                                   NL80211_FLAG_NEED_RTNL,
8417         },
8418         {
8419                 .cmd = NL80211_CMD_RADAR_DETECT,
8420                 .doit = nl80211_start_radar_detection,
8421                 .policy = nl80211_policy,
8422                 .flags = GENL_ADMIN_PERM,
8423                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8424                                   NL80211_FLAG_NEED_RTNL,
8425         },
8426 };
8427
8428 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8429         .name = "mlme",
8430 };
8431
8432 /* multicast groups */
8433 static struct genl_multicast_group nl80211_config_mcgrp = {
8434         .name = "config",
8435 };
8436 static struct genl_multicast_group nl80211_scan_mcgrp = {
8437         .name = "scan",
8438 };
8439 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8440         .name = "regulatory",
8441 };
8442
8443 /* notification functions */
8444
8445 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8446 {
8447         struct sk_buff *msg;
8448
8449         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8450         if (!msg)
8451                 return;
8452
8453         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
8454                 nlmsg_free(msg);
8455                 return;
8456         }
8457
8458         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8459                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8460 }
8461
8462 static int nl80211_add_scan_req(struct sk_buff *msg,
8463                                 struct cfg80211_registered_device *rdev)
8464 {
8465         struct cfg80211_scan_request *req = rdev->scan_req;
8466         struct nlattr *nest;
8467         int i;
8468
8469         ASSERT_RDEV_LOCK(rdev);
8470
8471         if (WARN_ON(!req))
8472                 return 0;
8473
8474         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8475         if (!nest)
8476                 goto nla_put_failure;
8477         for (i = 0; i < req->n_ssids; i++) {
8478                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8479                         goto nla_put_failure;
8480         }
8481         nla_nest_end(msg, nest);
8482
8483         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8484         if (!nest)
8485                 goto nla_put_failure;
8486         for (i = 0; i < req->n_channels; i++) {
8487                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8488                         goto nla_put_failure;
8489         }
8490         nla_nest_end(msg, nest);
8491
8492         if (req->ie &&
8493             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8494                 goto nla_put_failure;
8495
8496         if (req->flags)
8497                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8498
8499         return 0;
8500  nla_put_failure:
8501         return -ENOBUFS;
8502 }
8503
8504 static int nl80211_send_scan_msg(struct sk_buff *msg,
8505                                  struct cfg80211_registered_device *rdev,
8506                                  struct wireless_dev *wdev,
8507                                  u32 portid, u32 seq, int flags,
8508                                  u32 cmd)
8509 {
8510         void *hdr;
8511
8512         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8513         if (!hdr)
8514                 return -1;
8515
8516         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8517             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8518                                          wdev->netdev->ifindex)) ||
8519             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8520                 goto nla_put_failure;
8521
8522         /* ignore errors and send incomplete event anyway */
8523         nl80211_add_scan_req(msg, rdev);
8524
8525         return genlmsg_end(msg, hdr);
8526
8527  nla_put_failure:
8528         genlmsg_cancel(msg, hdr);
8529         return -EMSGSIZE;
8530 }
8531
8532 static int
8533 nl80211_send_sched_scan_msg(struct sk_buff *msg,
8534                             struct cfg80211_registered_device *rdev,
8535                             struct net_device *netdev,
8536                             u32 portid, u32 seq, int flags, u32 cmd)
8537 {
8538         void *hdr;
8539
8540         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8541         if (!hdr)
8542                 return -1;
8543
8544         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8545             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8546                 goto nla_put_failure;
8547
8548         return genlmsg_end(msg, hdr);
8549
8550  nla_put_failure:
8551         genlmsg_cancel(msg, hdr);
8552         return -EMSGSIZE;
8553 }
8554
8555 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
8556                              struct wireless_dev *wdev)
8557 {
8558         struct sk_buff *msg;
8559
8560         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8561         if (!msg)
8562                 return;
8563
8564         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8565                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
8566                 nlmsg_free(msg);
8567                 return;
8568         }
8569
8570         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8571                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8572 }
8573
8574 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
8575                             struct wireless_dev *wdev)
8576 {
8577         struct sk_buff *msg;
8578
8579         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8580         if (!msg)
8581                 return;
8582
8583         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8584                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
8585                 nlmsg_free(msg);
8586                 return;
8587         }
8588
8589         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8590                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8591 }
8592
8593 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
8594                                struct wireless_dev *wdev)
8595 {
8596         struct sk_buff *msg;
8597
8598         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8599         if (!msg)
8600                 return;
8601
8602         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8603                                   NL80211_CMD_SCAN_ABORTED) < 0) {
8604                 nlmsg_free(msg);
8605                 return;
8606         }
8607
8608         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8609                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8610 }
8611
8612 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
8613                                      struct net_device *netdev)
8614 {
8615         struct sk_buff *msg;
8616
8617         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8618         if (!msg)
8619                 return;
8620
8621         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
8622                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
8623                 nlmsg_free(msg);
8624                 return;
8625         }
8626
8627         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8628                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8629 }
8630
8631 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
8632                              struct net_device *netdev, u32 cmd)
8633 {
8634         struct sk_buff *msg;
8635
8636         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8637         if (!msg)
8638                 return;
8639
8640         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
8641                 nlmsg_free(msg);
8642                 return;
8643         }
8644
8645         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8646                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8647 }
8648
8649 /*
8650  * This can happen on global regulatory changes or device specific settings
8651  * based on custom world regulatory domains.
8652  */
8653 void nl80211_send_reg_change_event(struct regulatory_request *request)
8654 {
8655         struct sk_buff *msg;
8656         void *hdr;
8657
8658         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8659         if (!msg)
8660                 return;
8661
8662         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8663         if (!hdr) {
8664                 nlmsg_free(msg);
8665                 return;
8666         }
8667
8668         /* Userspace can always count this one always being set */
8669         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8670                 goto nla_put_failure;
8671
8672         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8673                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8674                                NL80211_REGDOM_TYPE_WORLD))
8675                         goto nla_put_failure;
8676         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8677                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8678                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8679                         goto nla_put_failure;
8680         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8681                    request->intersect) {
8682                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8683                                NL80211_REGDOM_TYPE_INTERSECTION))
8684                         goto nla_put_failure;
8685         } else {
8686                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8687                                NL80211_REGDOM_TYPE_COUNTRY) ||
8688                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8689                                    request->alpha2))
8690                         goto nla_put_failure;
8691         }
8692
8693         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
8694             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8695                 goto nla_put_failure;
8696
8697         genlmsg_end(msg, hdr);
8698
8699         rcu_read_lock();
8700         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8701                                 GFP_ATOMIC);
8702         rcu_read_unlock();
8703
8704         return;
8705
8706 nla_put_failure:
8707         genlmsg_cancel(msg, hdr);
8708         nlmsg_free(msg);
8709 }
8710
8711 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8712                                     struct net_device *netdev,
8713                                     const u8 *buf, size_t len,
8714                                     enum nl80211_commands cmd, gfp_t gfp)
8715 {
8716         struct sk_buff *msg;
8717         void *hdr;
8718
8719         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8720         if (!msg)
8721                 return;
8722
8723         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8724         if (!hdr) {
8725                 nlmsg_free(msg);
8726                 return;
8727         }
8728
8729         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8730             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8731             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8732                 goto nla_put_failure;
8733
8734         genlmsg_end(msg, hdr);
8735
8736         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8737                                 nl80211_mlme_mcgrp.id, gfp);
8738         return;
8739
8740  nla_put_failure:
8741         genlmsg_cancel(msg, hdr);
8742         nlmsg_free(msg);
8743 }
8744
8745 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8746                           struct net_device *netdev, const u8 *buf,
8747                           size_t len, gfp_t gfp)
8748 {
8749         nl80211_send_mlme_event(rdev, netdev, buf, len,
8750                                 NL80211_CMD_AUTHENTICATE, gfp);
8751 }
8752
8753 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8754                            struct net_device *netdev, const u8 *buf,
8755                            size_t len, gfp_t gfp)
8756 {
8757         nl80211_send_mlme_event(rdev, netdev, buf, len,
8758                                 NL80211_CMD_ASSOCIATE, gfp);
8759 }
8760
8761 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8762                          struct net_device *netdev, const u8 *buf,
8763                          size_t len, gfp_t gfp)
8764 {
8765         nl80211_send_mlme_event(rdev, netdev, buf, len,
8766                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8767 }
8768
8769 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8770                            struct net_device *netdev, const u8 *buf,
8771                            size_t len, gfp_t gfp)
8772 {
8773         nl80211_send_mlme_event(rdev, netdev, buf, len,
8774                                 NL80211_CMD_DISASSOCIATE, gfp);
8775 }
8776
8777 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8778                                 struct net_device *netdev, const u8 *buf,
8779                                 size_t len, gfp_t gfp)
8780 {
8781         nl80211_send_mlme_event(rdev, netdev, buf, len,
8782                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8783 }
8784
8785 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8786                                   struct net_device *netdev, const u8 *buf,
8787                                   size_t len, gfp_t gfp)
8788 {
8789         nl80211_send_mlme_event(rdev, netdev, buf, len,
8790                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8791 }
8792
8793 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8794                                       struct net_device *netdev, int cmd,
8795                                       const u8 *addr, gfp_t gfp)
8796 {
8797         struct sk_buff *msg;
8798         void *hdr;
8799
8800         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8801         if (!msg)
8802                 return;
8803
8804         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8805         if (!hdr) {
8806                 nlmsg_free(msg);
8807                 return;
8808         }
8809
8810         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8811             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8812             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8813             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8814                 goto nla_put_failure;
8815
8816         genlmsg_end(msg, hdr);
8817
8818         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8819                                 nl80211_mlme_mcgrp.id, gfp);
8820         return;
8821
8822  nla_put_failure:
8823         genlmsg_cancel(msg, hdr);
8824         nlmsg_free(msg);
8825 }
8826
8827 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8828                                struct net_device *netdev, const u8 *addr,
8829                                gfp_t gfp)
8830 {
8831         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8832                                   addr, gfp);
8833 }
8834
8835 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8836                                 struct net_device *netdev, const u8 *addr,
8837                                 gfp_t gfp)
8838 {
8839         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8840                                   addr, gfp);
8841 }
8842
8843 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8844                                  struct net_device *netdev, const u8 *bssid,
8845                                  const u8 *req_ie, size_t req_ie_len,
8846                                  const u8 *resp_ie, size_t resp_ie_len,
8847                                  u16 status, gfp_t gfp)
8848 {
8849         struct sk_buff *msg;
8850         void *hdr;
8851
8852         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8853         if (!msg)
8854                 return;
8855
8856         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8857         if (!hdr) {
8858                 nlmsg_free(msg);
8859                 return;
8860         }
8861
8862         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8863             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8864             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8865             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8866             (req_ie &&
8867              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8868             (resp_ie &&
8869              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8870                 goto nla_put_failure;
8871
8872         genlmsg_end(msg, hdr);
8873
8874         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8875                                 nl80211_mlme_mcgrp.id, gfp);
8876         return;
8877
8878  nla_put_failure:
8879         genlmsg_cancel(msg, hdr);
8880         nlmsg_free(msg);
8881
8882 }
8883
8884 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8885                          struct net_device *netdev, const u8 *bssid,
8886                          const u8 *req_ie, size_t req_ie_len,
8887                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8888 {
8889         struct sk_buff *msg;
8890         void *hdr;
8891
8892         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8893         if (!msg)
8894                 return;
8895
8896         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8897         if (!hdr) {
8898                 nlmsg_free(msg);
8899                 return;
8900         }
8901
8902         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8903             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8904             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8905             (req_ie &&
8906              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8907             (resp_ie &&
8908              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8909                 goto nla_put_failure;
8910
8911         genlmsg_end(msg, hdr);
8912
8913         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8914                                 nl80211_mlme_mcgrp.id, gfp);
8915         return;
8916
8917  nla_put_failure:
8918         genlmsg_cancel(msg, hdr);
8919         nlmsg_free(msg);
8920
8921 }
8922
8923 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8924                                struct net_device *netdev, u16 reason,
8925                                const u8 *ie, size_t ie_len, bool from_ap)
8926 {
8927         struct sk_buff *msg;
8928         void *hdr;
8929
8930         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8931         if (!msg)
8932                 return;
8933
8934         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8935         if (!hdr) {
8936                 nlmsg_free(msg);
8937                 return;
8938         }
8939
8940         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8941             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8942             (from_ap && reason &&
8943              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8944             (from_ap &&
8945              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8946             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8947                 goto nla_put_failure;
8948
8949         genlmsg_end(msg, hdr);
8950
8951         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8952                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8953         return;
8954
8955  nla_put_failure:
8956         genlmsg_cancel(msg, hdr);
8957         nlmsg_free(msg);
8958
8959 }
8960
8961 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8962                              struct net_device *netdev, const u8 *bssid,
8963                              gfp_t gfp)
8964 {
8965         struct sk_buff *msg;
8966         void *hdr;
8967
8968         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8969         if (!msg)
8970                 return;
8971
8972         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8973         if (!hdr) {
8974                 nlmsg_free(msg);
8975                 return;
8976         }
8977
8978         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8979             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8980             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8981                 goto nla_put_failure;
8982
8983         genlmsg_end(msg, hdr);
8984
8985         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8986                                 nl80211_mlme_mcgrp.id, gfp);
8987         return;
8988
8989  nla_put_failure:
8990         genlmsg_cancel(msg, hdr);
8991         nlmsg_free(msg);
8992 }
8993
8994 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
8995                 struct net_device *netdev,
8996                 const u8 *macaddr, const u8* ie, u8 ie_len,
8997                 gfp_t gfp)
8998 {
8999         struct sk_buff *msg;
9000         void *hdr;
9001
9002         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9003         if (!msg)
9004                 return;
9005
9006         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9007         if (!hdr) {
9008                 nlmsg_free(msg);
9009                 return;
9010         }
9011
9012         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9013             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9014             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
9015             (ie_len && ie &&
9016              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9017                 goto nla_put_failure;
9018
9019         genlmsg_end(msg, hdr);
9020
9021         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9022                                 nl80211_mlme_mcgrp.id, gfp);
9023         return;
9024
9025  nla_put_failure:
9026         genlmsg_cancel(msg, hdr);
9027         nlmsg_free(msg);
9028 }
9029
9030 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9031                                  struct net_device *netdev, const u8 *addr,
9032                                  enum nl80211_key_type key_type, int key_id,
9033                                  const u8 *tsc, gfp_t gfp)
9034 {
9035         struct sk_buff *msg;
9036         void *hdr;
9037
9038         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9039         if (!msg)
9040                 return;
9041
9042         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9043         if (!hdr) {
9044                 nlmsg_free(msg);
9045                 return;
9046         }
9047
9048         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9049             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9050             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9051             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9052             (key_id != -1 &&
9053              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9054             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9055                 goto nla_put_failure;
9056
9057         genlmsg_end(msg, hdr);
9058
9059         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9060                                 nl80211_mlme_mcgrp.id, gfp);
9061         return;
9062
9063  nla_put_failure:
9064         genlmsg_cancel(msg, hdr);
9065         nlmsg_free(msg);
9066 }
9067
9068 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9069                                     struct ieee80211_channel *channel_before,
9070                                     struct ieee80211_channel *channel_after)
9071 {
9072         struct sk_buff *msg;
9073         void *hdr;
9074         struct nlattr *nl_freq;
9075
9076         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9077         if (!msg)
9078                 return;
9079
9080         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9081         if (!hdr) {
9082                 nlmsg_free(msg);
9083                 return;
9084         }
9085
9086         /*
9087          * Since we are applying the beacon hint to a wiphy we know its
9088          * wiphy_idx is valid
9089          */
9090         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9091                 goto nla_put_failure;
9092
9093         /* Before */
9094         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9095         if (!nl_freq)
9096                 goto nla_put_failure;
9097         if (nl80211_msg_put_channel(msg, channel_before))
9098                 goto nla_put_failure;
9099         nla_nest_end(msg, nl_freq);
9100
9101         /* After */
9102         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9103         if (!nl_freq)
9104                 goto nla_put_failure;
9105         if (nl80211_msg_put_channel(msg, channel_after))
9106                 goto nla_put_failure;
9107         nla_nest_end(msg, nl_freq);
9108
9109         genlmsg_end(msg, hdr);
9110
9111         rcu_read_lock();
9112         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9113                                 GFP_ATOMIC);
9114         rcu_read_unlock();
9115
9116         return;
9117
9118 nla_put_failure:
9119         genlmsg_cancel(msg, hdr);
9120         nlmsg_free(msg);
9121 }
9122
9123 static void nl80211_send_remain_on_chan_event(
9124         int cmd, struct cfg80211_registered_device *rdev,
9125         struct wireless_dev *wdev, u64 cookie,
9126         struct ieee80211_channel *chan,
9127         unsigned int duration, gfp_t gfp)
9128 {
9129         struct sk_buff *msg;
9130         void *hdr;
9131
9132         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9133         if (!msg)
9134                 return;
9135
9136         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9137         if (!hdr) {
9138                 nlmsg_free(msg);
9139                 return;
9140         }
9141
9142         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9143             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9144                                          wdev->netdev->ifindex)) ||
9145             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9146             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9147             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9148                         NL80211_CHAN_NO_HT) ||
9149             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9150                 goto nla_put_failure;
9151
9152         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9153             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9154                 goto nla_put_failure;
9155
9156         genlmsg_end(msg, hdr);
9157
9158         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9159                                 nl80211_mlme_mcgrp.id, gfp);
9160         return;
9161
9162  nla_put_failure:
9163         genlmsg_cancel(msg, hdr);
9164         nlmsg_free(msg);
9165 }
9166
9167 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
9168                                     struct wireless_dev *wdev, u64 cookie,
9169                                     struct ieee80211_channel *chan,
9170                                     unsigned int duration, gfp_t gfp)
9171 {
9172         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9173                                           rdev, wdev, cookie, chan,
9174                                           duration, gfp);
9175 }
9176
9177 void nl80211_send_remain_on_channel_cancel(
9178         struct cfg80211_registered_device *rdev,
9179         struct wireless_dev *wdev,
9180         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
9181 {
9182         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9183                                           rdev, wdev, cookie, chan, 0, gfp);
9184 }
9185
9186 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
9187                             struct net_device *dev, const u8 *mac_addr,
9188                             struct station_info *sinfo, gfp_t gfp)
9189 {
9190         struct sk_buff *msg;
9191
9192         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9193         if (!msg)
9194                 return;
9195
9196         if (nl80211_send_station(msg, 0, 0, 0,
9197                                  rdev, dev, mac_addr, sinfo) < 0) {
9198                 nlmsg_free(msg);
9199                 return;
9200         }
9201
9202         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9203                                 nl80211_mlme_mcgrp.id, gfp);
9204 }
9205
9206 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
9207                                 struct net_device *dev, const u8 *mac_addr,
9208                                 gfp_t gfp)
9209 {
9210         struct sk_buff *msg;
9211         void *hdr;
9212
9213         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9214         if (!msg)
9215                 return;
9216
9217         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9218         if (!hdr) {
9219                 nlmsg_free(msg);
9220                 return;
9221         }
9222
9223         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9224             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9225                 goto nla_put_failure;
9226
9227         genlmsg_end(msg, hdr);
9228
9229         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9230                                 nl80211_mlme_mcgrp.id, gfp);
9231         return;
9232
9233  nla_put_failure:
9234         genlmsg_cancel(msg, hdr);
9235         nlmsg_free(msg);
9236 }
9237
9238 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
9239                                     struct net_device *dev, const u8 *mac_addr,
9240                                     enum nl80211_connect_failed_reason reason,
9241                                     gfp_t gfp)
9242 {
9243         struct sk_buff *msg;
9244         void *hdr;
9245
9246         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9247         if (!msg)
9248                 return;
9249
9250         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9251         if (!hdr) {
9252                 nlmsg_free(msg);
9253                 return;
9254         }
9255
9256         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9257             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9258             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9259                 goto nla_put_failure;
9260
9261         genlmsg_end(msg, hdr);
9262
9263         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9264                                 nl80211_mlme_mcgrp.id, gfp);
9265         return;
9266
9267  nla_put_failure:
9268         genlmsg_cancel(msg, hdr);
9269         nlmsg_free(msg);
9270 }
9271
9272 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9273                                        const u8 *addr, gfp_t gfp)
9274 {
9275         struct wireless_dev *wdev = dev->ieee80211_ptr;
9276         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9277         struct sk_buff *msg;
9278         void *hdr;
9279         int err;
9280         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9281
9282         if (!nlportid)
9283                 return false;
9284
9285         msg = nlmsg_new(100, gfp);
9286         if (!msg)
9287                 return true;
9288
9289         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9290         if (!hdr) {
9291                 nlmsg_free(msg);
9292                 return true;
9293         }
9294
9295         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9296             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9297             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9298                 goto nla_put_failure;
9299
9300         err = genlmsg_end(msg, hdr);
9301         if (err < 0) {
9302                 nlmsg_free(msg);
9303                 return true;
9304         }
9305
9306         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9307         return true;
9308
9309  nla_put_failure:
9310         genlmsg_cancel(msg, hdr);
9311         nlmsg_free(msg);
9312         return true;
9313 }
9314
9315 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
9316 {
9317         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9318                                           addr, gfp);
9319 }
9320
9321 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
9322                                     const u8 *addr, gfp_t gfp)
9323 {
9324         return __nl80211_unexpected_frame(dev,
9325                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9326                                           addr, gfp);
9327 }
9328
9329 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9330                       struct wireless_dev *wdev, u32 nlportid,
9331                       int freq, int sig_dbm,
9332                       const u8 *buf, size_t len, gfp_t gfp)
9333 {
9334         struct net_device *netdev = wdev->netdev;
9335         struct sk_buff *msg;
9336         void *hdr;
9337
9338         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9339         if (!msg)
9340                 return -ENOMEM;
9341
9342         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9343         if (!hdr) {
9344                 nlmsg_free(msg);
9345                 return -ENOMEM;
9346         }
9347
9348         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9349             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9350                                         netdev->ifindex)) ||
9351             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9352             (sig_dbm &&
9353              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9354             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9355                 goto nla_put_failure;
9356
9357         genlmsg_end(msg, hdr);
9358
9359         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9360
9361  nla_put_failure:
9362         genlmsg_cancel(msg, hdr);
9363         nlmsg_free(msg);
9364         return -ENOBUFS;
9365 }
9366
9367 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
9368                                  struct wireless_dev *wdev, u64 cookie,
9369                                  const u8 *buf, size_t len, bool ack,
9370                                  gfp_t gfp)
9371 {
9372         struct net_device *netdev = wdev->netdev;
9373         struct sk_buff *msg;
9374         void *hdr;
9375
9376         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9377         if (!msg)
9378                 return;
9379
9380         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9381         if (!hdr) {
9382                 nlmsg_free(msg);
9383                 return;
9384         }
9385
9386         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9387             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9388                                    netdev->ifindex)) ||
9389             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9390             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9391             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9392                 goto nla_put_failure;
9393
9394         genlmsg_end(msg, hdr);
9395
9396         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9397         return;
9398
9399  nla_put_failure:
9400         genlmsg_cancel(msg, hdr);
9401         nlmsg_free(msg);
9402 }
9403
9404 void
9405 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
9406                              struct net_device *netdev,
9407                              enum nl80211_cqm_rssi_threshold_event rssi_event,
9408                              gfp_t gfp)
9409 {
9410         struct sk_buff *msg;
9411         struct nlattr *pinfoattr;
9412         void *hdr;
9413
9414         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9415         if (!msg)
9416                 return;
9417
9418         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9419         if (!hdr) {
9420                 nlmsg_free(msg);
9421                 return;
9422         }
9423
9424         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9425             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9426                 goto nla_put_failure;
9427
9428         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9429         if (!pinfoattr)
9430                 goto nla_put_failure;
9431
9432         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9433                         rssi_event))
9434                 goto nla_put_failure;
9435
9436         nla_nest_end(msg, pinfoattr);
9437
9438         genlmsg_end(msg, hdr);
9439
9440         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9441                                 nl80211_mlme_mcgrp.id, gfp);
9442         return;
9443
9444  nla_put_failure:
9445         genlmsg_cancel(msg, hdr);
9446         nlmsg_free(msg);
9447 }
9448
9449 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9450                               struct net_device *netdev, const u8 *bssid,
9451                               const u8 *replay_ctr, gfp_t gfp)
9452 {
9453         struct sk_buff *msg;
9454         struct nlattr *rekey_attr;
9455         void *hdr;
9456
9457         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9458         if (!msg)
9459                 return;
9460
9461         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
9462         if (!hdr) {
9463                 nlmsg_free(msg);
9464                 return;
9465         }
9466
9467         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9468             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9469             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9470                 goto nla_put_failure;
9471
9472         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
9473         if (!rekey_attr)
9474                 goto nla_put_failure;
9475
9476         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
9477                     NL80211_REPLAY_CTR_LEN, replay_ctr))
9478                 goto nla_put_failure;
9479
9480         nla_nest_end(msg, rekey_attr);
9481
9482         genlmsg_end(msg, hdr);
9483
9484         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9485                                 nl80211_mlme_mcgrp.id, gfp);
9486         return;
9487
9488  nla_put_failure:
9489         genlmsg_cancel(msg, hdr);
9490         nlmsg_free(msg);
9491 }
9492
9493 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
9494                                     struct net_device *netdev, int index,
9495                                     const u8 *bssid, bool preauth, gfp_t gfp)
9496 {
9497         struct sk_buff *msg;
9498         struct nlattr *attr;
9499         void *hdr;
9500
9501         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9502         if (!msg)
9503                 return;
9504
9505         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
9506         if (!hdr) {
9507                 nlmsg_free(msg);
9508                 return;
9509         }
9510
9511         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9512             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9513                 goto nla_put_failure;
9514
9515         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
9516         if (!attr)
9517                 goto nla_put_failure;
9518
9519         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
9520             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
9521             (preauth &&
9522              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
9523                 goto nla_put_failure;
9524
9525         nla_nest_end(msg, attr);
9526
9527         genlmsg_end(msg, hdr);
9528
9529         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9530                                 nl80211_mlme_mcgrp.id, gfp);
9531         return;
9532
9533  nla_put_failure:
9534         genlmsg_cancel(msg, hdr);
9535         nlmsg_free(msg);
9536 }
9537
9538 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
9539                               struct net_device *netdev,
9540                               struct cfg80211_chan_def *chandef, gfp_t gfp)
9541 {
9542         struct sk_buff *msg;
9543         void *hdr;
9544
9545         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9546         if (!msg)
9547                 return;
9548
9549         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
9550         if (!hdr) {
9551                 nlmsg_free(msg);
9552                 return;
9553         }
9554
9555         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9556                 goto nla_put_failure;
9557
9558         if (nl80211_send_chandef(msg, chandef))
9559                 goto nla_put_failure;
9560
9561         genlmsg_end(msg, hdr);
9562
9563         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9564                                 nl80211_mlme_mcgrp.id, gfp);
9565         return;
9566
9567  nla_put_failure:
9568         genlmsg_cancel(msg, hdr);
9569         nlmsg_free(msg);
9570 }
9571
9572 void
9573 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
9574                             struct net_device *netdev, const u8 *peer,
9575                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
9576 {
9577         struct sk_buff *msg;
9578         struct nlattr *pinfoattr;
9579         void *hdr;
9580
9581         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9582         if (!msg)
9583                 return;
9584
9585         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9586         if (!hdr) {
9587                 nlmsg_free(msg);
9588                 return;
9589         }
9590
9591         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9592             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9593             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9594                 goto nla_put_failure;
9595
9596         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9597         if (!pinfoattr)
9598                 goto nla_put_failure;
9599
9600         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
9601                 goto nla_put_failure;
9602
9603         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
9604                 goto nla_put_failure;
9605
9606         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
9607                 goto nla_put_failure;
9608
9609         nla_nest_end(msg, pinfoattr);
9610
9611         genlmsg_end(msg, hdr);
9612
9613         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9614                                 nl80211_mlme_mcgrp.id, gfp);
9615         return;
9616
9617  nla_put_failure:
9618         genlmsg_cancel(msg, hdr);
9619         nlmsg_free(msg);
9620 }
9621
9622 void
9623 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
9624                      struct cfg80211_chan_def *chandef,
9625                      enum nl80211_radar_event event,
9626                      struct net_device *netdev, gfp_t gfp)
9627 {
9628         struct sk_buff *msg;
9629         void *hdr;
9630
9631         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9632         if (!msg)
9633                 return;
9634
9635         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
9636         if (!hdr) {
9637                 nlmsg_free(msg);
9638                 return;
9639         }
9640
9641         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
9642                 goto nla_put_failure;
9643
9644         /* NOP and radar events don't need a netdev parameter */
9645         if (netdev) {
9646                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
9647
9648                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9649                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9650                         goto nla_put_failure;
9651         }
9652
9653         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
9654                 goto nla_put_failure;
9655
9656         if (nl80211_send_chandef(msg, chandef))
9657                 goto nla_put_failure;
9658
9659         if (genlmsg_end(msg, hdr) < 0) {
9660                 nlmsg_free(msg);
9661                 return;
9662         }
9663
9664         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9665                                 nl80211_mlme_mcgrp.id, gfp);
9666         return;
9667
9668  nla_put_failure:
9669         genlmsg_cancel(msg, hdr);
9670         nlmsg_free(msg);
9671 }
9672
9673 void
9674 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
9675                                 struct net_device *netdev, const u8 *peer,
9676                                 u32 num_packets, gfp_t gfp)
9677 {
9678         struct sk_buff *msg;
9679         struct nlattr *pinfoattr;
9680         void *hdr;
9681
9682         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9683         if (!msg)
9684                 return;
9685
9686         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9687         if (!hdr) {
9688                 nlmsg_free(msg);
9689                 return;
9690         }
9691
9692         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9693             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9694             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9695                 goto nla_put_failure;
9696
9697         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9698         if (!pinfoattr)
9699                 goto nla_put_failure;
9700
9701         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9702                 goto nla_put_failure;
9703
9704         nla_nest_end(msg, pinfoattr);
9705
9706         genlmsg_end(msg, hdr);
9707
9708         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9709                                 nl80211_mlme_mcgrp.id, gfp);
9710         return;
9711
9712  nla_put_failure:
9713         genlmsg_cancel(msg, hdr);
9714         nlmsg_free(msg);
9715 }
9716
9717 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9718                            u64 cookie, bool acked, gfp_t gfp)
9719 {
9720         struct wireless_dev *wdev = dev->ieee80211_ptr;
9721         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9722         struct sk_buff *msg;
9723         void *hdr;
9724         int err;
9725
9726         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9727
9728         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9729
9730         if (!msg)
9731                 return;
9732
9733         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9734         if (!hdr) {
9735                 nlmsg_free(msg);
9736                 return;
9737         }
9738
9739         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9740             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9741             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9742             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9743             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9744                 goto nla_put_failure;
9745
9746         err = genlmsg_end(msg, hdr);
9747         if (err < 0) {
9748                 nlmsg_free(msg);
9749                 return;
9750         }
9751
9752         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9753                                 nl80211_mlme_mcgrp.id, gfp);
9754         return;
9755
9756  nla_put_failure:
9757         genlmsg_cancel(msg, hdr);
9758         nlmsg_free(msg);
9759 }
9760 EXPORT_SYMBOL(cfg80211_probe_status);
9761
9762 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9763                                  const u8 *frame, size_t len,
9764                                  int freq, int sig_dbm)
9765 {
9766         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9767         struct sk_buff *msg;
9768         void *hdr;
9769         struct cfg80211_beacon_registration *reg;
9770
9771         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9772
9773         spin_lock_bh(&rdev->beacon_registrations_lock);
9774         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9775                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9776                 if (!msg) {
9777                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9778                         return;
9779                 }
9780
9781                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9782                 if (!hdr)
9783                         goto nla_put_failure;
9784
9785                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9786                     (freq &&
9787                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9788                     (sig_dbm &&
9789                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9790                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9791                         goto nla_put_failure;
9792
9793                 genlmsg_end(msg, hdr);
9794
9795                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9796         }
9797         spin_unlock_bh(&rdev->beacon_registrations_lock);
9798         return;
9799
9800  nla_put_failure:
9801         spin_unlock_bh(&rdev->beacon_registrations_lock);
9802         if (hdr)
9803                 genlmsg_cancel(msg, hdr);
9804         nlmsg_free(msg);
9805 }
9806 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9807
9808 #ifdef CONFIG_PM
9809 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
9810                                    struct cfg80211_wowlan_wakeup *wakeup,
9811                                    gfp_t gfp)
9812 {
9813         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9814         struct sk_buff *msg;
9815         void *hdr;
9816         int err, size = 200;
9817
9818         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
9819
9820         if (wakeup)
9821                 size += wakeup->packet_present_len;
9822
9823         msg = nlmsg_new(size, gfp);
9824         if (!msg)
9825                 return;
9826
9827         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
9828         if (!hdr)
9829                 goto free_msg;
9830
9831         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9832             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9833                 goto free_msg;
9834
9835         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9836                                         wdev->netdev->ifindex))
9837                 goto free_msg;
9838
9839         if (wakeup) {
9840                 struct nlattr *reasons;
9841
9842                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9843
9844                 if (wakeup->disconnect &&
9845                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
9846                         goto free_msg;
9847                 if (wakeup->magic_pkt &&
9848                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
9849                         goto free_msg;
9850                 if (wakeup->gtk_rekey_failure &&
9851                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
9852                         goto free_msg;
9853                 if (wakeup->eap_identity_req &&
9854                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
9855                         goto free_msg;
9856                 if (wakeup->four_way_handshake &&
9857                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
9858                         goto free_msg;
9859                 if (wakeup->rfkill_release &&
9860                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
9861                         goto free_msg;
9862
9863                 if (wakeup->pattern_idx >= 0 &&
9864                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
9865                                 wakeup->pattern_idx))
9866                         goto free_msg;
9867
9868                 if (wakeup->tcp_match)
9869                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
9870
9871                 if (wakeup->tcp_connlost)
9872                         nla_put_flag(msg,
9873                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
9874
9875                 if (wakeup->tcp_nomoretokens)
9876                         nla_put_flag(msg,
9877                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
9878
9879                 if (wakeup->packet) {
9880                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
9881                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
9882
9883                         if (!wakeup->packet_80211) {
9884                                 pkt_attr =
9885                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
9886                                 len_attr =
9887                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
9888                         }
9889
9890                         if (wakeup->packet_len &&
9891                             nla_put_u32(msg, len_attr, wakeup->packet_len))
9892                                 goto free_msg;
9893
9894                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
9895                                     wakeup->packet))
9896                                 goto free_msg;
9897                 }
9898
9899                 nla_nest_end(msg, reasons);
9900         }
9901
9902         err = genlmsg_end(msg, hdr);
9903         if (err < 0)
9904                 goto free_msg;
9905
9906         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9907                                 nl80211_mlme_mcgrp.id, gfp);
9908         return;
9909
9910  free_msg:
9911         nlmsg_free(msg);
9912 }
9913 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
9914 #endif
9915
9916 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9917                                 enum nl80211_tdls_operation oper,
9918                                 u16 reason_code, gfp_t gfp)
9919 {
9920         struct wireless_dev *wdev = dev->ieee80211_ptr;
9921         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9922         struct sk_buff *msg;
9923         void *hdr;
9924         int err;
9925
9926         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9927                                          reason_code);
9928
9929         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9930         if (!msg)
9931                 return;
9932
9933         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9934         if (!hdr) {
9935                 nlmsg_free(msg);
9936                 return;
9937         }
9938
9939         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9940             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9941             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9942             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9943             (reason_code > 0 &&
9944              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9945                 goto nla_put_failure;
9946
9947         err = genlmsg_end(msg, hdr);
9948         if (err < 0) {
9949                 nlmsg_free(msg);
9950                 return;
9951         }
9952
9953         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9954                                 nl80211_mlme_mcgrp.id, gfp);
9955         return;
9956
9957  nla_put_failure:
9958         genlmsg_cancel(msg, hdr);
9959         nlmsg_free(msg);
9960 }
9961 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9962
9963 static int nl80211_netlink_notify(struct notifier_block * nb,
9964                                   unsigned long state,
9965                                   void *_notify)
9966 {
9967         struct netlink_notify *notify = _notify;
9968         struct cfg80211_registered_device *rdev;
9969         struct wireless_dev *wdev;
9970         struct cfg80211_beacon_registration *reg, *tmp;
9971
9972         if (state != NETLINK_URELEASE)
9973                 return NOTIFY_DONE;
9974
9975         rcu_read_lock();
9976
9977         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9978                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9979                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
9980
9981                 spin_lock_bh(&rdev->beacon_registrations_lock);
9982                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
9983                                          list) {
9984                         if (reg->nlportid == notify->portid) {
9985                                 list_del(&reg->list);
9986                                 kfree(reg);
9987                                 break;
9988                         }
9989                 }
9990                 spin_unlock_bh(&rdev->beacon_registrations_lock);
9991         }
9992
9993         rcu_read_unlock();
9994
9995         return NOTIFY_DONE;
9996 }
9997
9998 static struct notifier_block nl80211_netlink_notifier = {
9999         .notifier_call = nl80211_netlink_notify,
10000 };
10001
10002 /* initialisation/exit functions */
10003
10004 int nl80211_init(void)
10005 {
10006         int err;
10007
10008         err = genl_register_family_with_ops(&nl80211_fam,
10009                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10010         if (err)
10011                 return err;
10012
10013         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10014         if (err)
10015                 goto err_out;
10016
10017         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10018         if (err)
10019                 goto err_out;
10020
10021         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10022         if (err)
10023                 goto err_out;
10024
10025         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10026         if (err)
10027                 goto err_out;
10028
10029 #ifdef CONFIG_NL80211_TESTMODE
10030         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10031         if (err)
10032                 goto err_out;
10033 #endif
10034
10035         err = netlink_register_notifier(&nl80211_netlink_notifier);
10036         if (err)
10037                 goto err_out;
10038
10039         return 0;
10040  err_out:
10041         genl_unregister_family(&nl80211_fam);
10042         return err;
10043 }
10044
10045 void nl80211_exit(void)
10046 {
10047         netlink_unregister_notifier(&nl80211_netlink_notifier);
10048         genl_unregister_family(&nl80211_fam);
10049 }