Pileus Git - ~andy/linux/blob - 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 "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* internal helper: get rdev and dev */
  50 static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs,
  51                                    struct cfg80211_registered_device **rdev,
  52                                    struct net_device **dev)
  53 {
  54         int ifindex;
  55
  56         if (!attrs[NL80211_ATTR_IFINDEX])
  57                 return -EINVAL;
  58
  59         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  60         *dev = dev_get_by_index(netns, ifindex);
  61         if (!*dev)
  62                 return -ENODEV;
  63
  64         *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  65         if (IS_ERR(*rdev)) {
  66                 dev_put(*dev);
  67                 return PTR_ERR(*rdev);
  68         }
  69
  70         return 0;
  71 }
  72
  73 static struct cfg80211_registered_device *
  74 __cfg80211_rdev_from_info(struct genl_info *info)
  75 {
  76         struct cfg80211_registered_device *rdev = NULL, *tmp;
  77         struct net_device *netdev;
  78
  79         assert_cfg80211_lock();
  80
  81         if (!info->attrs[NL80211_ATTR_WIPHY] &&
  82             !info->attrs[NL80211_ATTR_IFINDEX])
  83                 return ERR_PTR(-EINVAL);
  84
  85         if (info->attrs[NL80211_ATTR_WIPHY])
  86                 rdev = cfg80211_rdev_by_wiphy_idx(
  87                                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
  88
  89         if (info->attrs[NL80211_ATTR_IFINDEX]) {
  90                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
  91                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
  92                 if (netdev) {
  93                         if (netdev->ieee80211_ptr)
  94                                 tmp = wiphy_to_dev(
  95                                                 netdev->ieee80211_ptr->wiphy);
  96                         else
  97                                 tmp = NULL;
  98
  99                         dev_put(netdev);
 100
 101                         /* not wireless device -- return error */
 102                         if (!tmp)
 103                                 return ERR_PTR(-EINVAL);
 104
 105                         /* mismatch -- return error */
 106                         if (rdev && tmp != rdev)
 107                                 return ERR_PTR(-EINVAL);
 108
 109                         rdev = tmp;
 110                 }
 111         }
 112
 113         if (rdev)
 114                 return rdev;
 115
 116         return ERR_PTR(-ENODEV);
 117 }
 118
 119 /*
 120  * This function returns a pointer to the driver
 121  * that the genl_info item that is passed refers to.
 122  * If successful, it returns non-NULL and also locks
 123  * the driver's mutex!
 124  *
 125  * This means that you need to call cfg80211_unlock_rdev()
 126  * before being allowed to acquire &cfg80211_mutex!
 127  *
 128  * This is necessary because we need to lock the global
 129  * mutex to get an item off the list safely, and then
 130  * we lock the rdev mutex so it doesn't go away under us.
 131  *
 132  * We don't want to keep cfg80211_mutex locked
 133  * for all the time in order to allow requests on
 134  * other interfaces to go through at the same time.
 135  *
 136  * The result of this can be a PTR_ERR and hence must
 137  * be checked with IS_ERR() for errors.
 138  */
 139 static struct cfg80211_registered_device *
 140 cfg80211_get_dev_from_info(struct genl_info *info)
 141 {
 142         struct cfg80211_registered_device *rdev;
 143
 144         mutex_lock(&cfg80211_mutex);
 145         rdev = __cfg80211_rdev_from_info(info);
 146
 147         /* if it is not an error we grab the lock on
 148          * it to assure it won't be going away while
 149          * we operate on it */
 150         if (!IS_ERR(rdev))
 151                 mutex_lock(&rdev->mtx);
 152
 153         mutex_unlock(&cfg80211_mutex);
 154
 155         return rdev;
 156 }
 157
 158 /* policy for the attributes */
 159 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 160         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 161         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 162                                       .len = 20-1 },
 163         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 164         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 165         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 166         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 167         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 168         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 170         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 171
 172         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 173         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 174         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 175
 176         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 177         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 178
 179         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 180         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 181                                     .len = WLAN_MAX_KEY_LEN },
 182         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 183         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 184         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 185         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 186         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 187
 188         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 189         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 190         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 191                                        .len = IEEE80211_MAX_DATA_LEN },
 192         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 193                                        .len = IEEE80211_MAX_DATA_LEN },
 194         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 195         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 196         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 197         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 198                                                .len = NL80211_MAX_SUPP_RATES },
 199         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 200         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 201         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 202         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 203                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 204         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 205
 206         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 207         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 208
 209         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 210         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 211         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 212         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 213                                            .len = NL80211_MAX_SUPP_RATES },
 214         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 215
 216         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 217         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 218
 219         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 220
 221         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 222         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 223                               .len = IEEE80211_MAX_DATA_LEN },
 224         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 225         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 226
 227         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 228                                 .len = IEEE80211_MAX_SSID_LEN },
 229         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 231         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 232         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 233         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 234         [NL80211_ATTR_STA_FLAGS2] = {
 235                 .len = sizeof(struct nl80211_sta_flag_update),
 236         },
 237         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 238         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 239         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 240         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 241         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 242         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 243         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 244         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 245         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 246                                  .len = WLAN_PMKID_LEN },
 247         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 248         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 249         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 250         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 251                                  .len = IEEE80211_MAX_DATA_LEN },
 252         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 253         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 254         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 255         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 256         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 257         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 258         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 259         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 260         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 261         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 262         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 263         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 264         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 265         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 266         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 267         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 268         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 269         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 270         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 271         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 272                                          .len = IEEE80211_MAX_DATA_LEN },
 273         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 274                                          .len = IEEE80211_MAX_DATA_LEN },
 275         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 276         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 277         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 278         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 279         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 280         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 281         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 282         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 283         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 284         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 285                                       .len = IEEE80211_MAX_DATA_LEN },
 286         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 287         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 288         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 289                 .len = NL80211_HT_CAPABILITY_LEN
 290         },
 291         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 292         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 293         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 294 };
 295
 296 /* policy for the key attributes */
 297 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 298         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 299         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 300         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 301         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 302         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 303         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 304         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 305         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 306 };
 307
 308 /* policy for the key default flags */
 309 static const struct nla_policy
 310 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 311         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 312         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 313 };
 314
 315 /* policy for WoWLAN attributes */
 316 static const struct nla_policy
 317 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 318         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 319         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 320         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 321         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 322         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 323         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 324         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 325         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 326 };
 327
 328 /* policy for GTK rekey offload attributes */
 329 static const struct nla_policy
 330 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 331         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 332         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 333         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 334 };
 335
 336 static const struct nla_policy
 337 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 338         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 339                                                  .len = IEEE80211_MAX_SSID_LEN },
 340 };
 341
 342 /* ifidx get helper */
 343 static int nl80211_get_ifidx(struct netlink_callback *cb)
 344 {
 345         int res;
 346
 347         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 348                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 349                           nl80211_policy);
 350         if (res)
 351                 return res;
 352
 353         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 354                 return -EINVAL;
 355
 356         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 357         if (!res)
 358                 return -EINVAL;
 359         return res;
 360 }
 361
 362 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 363                                        struct netlink_callback *cb,
 364                                        struct cfg80211_registered_device **rdev,
 365                                        struct net_device **dev)
 366 {
 367         int ifidx = cb->args[0];
 368         int err;
 369
 370         if (!ifidx)
 371                 ifidx = nl80211_get_ifidx(cb);
 372         if (ifidx < 0)
 373                 return ifidx;
 374
 375         cb->args[0] = ifidx;
 376
 377         rtnl_lock();
 378
 379         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 380         if (!*dev) {
 381                 err = -ENODEV;
 382                 goto out_rtnl;
 383         }
 384
 385         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 386         if (IS_ERR(*rdev)) {
 387                 err = PTR_ERR(*rdev);
 388                 goto out_rtnl;
 389         }
 390
 391         return 0;
 392  out_rtnl:
 393         rtnl_unlock();
 394         return err;
 395 }
 396
 397 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 398 {
 399         cfg80211_unlock_rdev(rdev);
 400         rtnl_unlock();
 401 }
 402
 403 /* IE validation */
 404 static bool is_valid_ie_attr(const struct nlattr *attr)
 405 {
 406         const u8 *pos;
 407         int len;
 408
 409         if (!attr)
 410                 return true;
 411
 412         pos = nla_data(attr);
 413         len = nla_len(attr);
 414
 415         while (len) {
 416                 u8 elemlen;
 417
 418                 if (len < 2)
 419                         return false;
 420                 len -= 2;
 421
 422                 elemlen = pos[1];
 423                 if (elemlen > len)
 424                         return false;
 425
 426                 len -= elemlen;
 427                 pos += 2 + elemlen;
 428         }
 429
 430         return true;
 431 }
 432
 433 /* message building helper */
 434 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 435                                    int flags, u8 cmd)
 436 {
 437         /* since there is no private header just add the generic one */
 438         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 439 }
 440
 441 static int nl80211_msg_put_channel(struct sk_buff *msg,
 442                                    struct ieee80211_channel *chan)
 443 {
 444         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 445                         chan->center_freq))
 446                 goto nla_put_failure;
 447
 448         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 449             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 450                 goto nla_put_failure;
 451         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 452             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 453                 goto nla_put_failure;
 454         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 455             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 456                 goto nla_put_failure;
 457         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 458             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 459                 goto nla_put_failure;
 460
 461         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 462                         DBM_TO_MBM(chan->max_power)))
 463                 goto nla_put_failure;
 464
 465         return 0;
 466
 467  nla_put_failure:
 468         return -ENOBUFS;
 469 }
 470
 471 /* netlink command implementations */
 472
 473 struct key_parse {
 474         struct key_params p;
 475         int idx;
 476         int type;
 477         bool def, defmgmt;
 478         bool def_uni, def_multi;
 479 };
 480
 481 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 482 {
 483         struct nlattr *tb[NL80211_KEY_MAX + 1];
 484         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 485                                    nl80211_key_policy);
 486         if (err)
 487                 return err;
 488
 489         k->def = !!tb[NL80211_KEY_DEFAULT];
 490         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 491
 492         if (k->def) {
 493                 k->def_uni = true;
 494                 k->def_multi = true;
 495         }
 496         if (k->defmgmt)
 497                 k->def_multi = true;
 498
 499         if (tb[NL80211_KEY_IDX])
 500                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 501
 502         if (tb[NL80211_KEY_DATA]) {
 503                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 504                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 505         }
 506
 507         if (tb[NL80211_KEY_SEQ]) {
 508                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 509                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 510         }
 511
 512         if (tb[NL80211_KEY_CIPHER])
 513                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 514
 515         if (tb[NL80211_KEY_TYPE]) {
 516                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 517                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 518                         return -EINVAL;
 519         }
 520
 521         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 522                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 523                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 524                                        tb[NL80211_KEY_DEFAULT_TYPES],
 525                                        nl80211_key_default_policy);
 526                 if (err)
 527                         return err;
 528
 529                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 530                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 531         }
 532
 533         return 0;
 534 }
 535
 536 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 537 {
 538         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 539                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 540                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 541         }
 542
 543         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 544                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 545                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 546         }
 547
 548         if (info->attrs[NL80211_ATTR_KEY_IDX])
 549                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 550
 551         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 552                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 553
 554         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 555         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 556
 557         if (k->def) {
 558                 k->def_uni = true;
 559                 k->def_multi = true;
 560         }
 561         if (k->defmgmt)
 562                 k->def_multi = true;
 563
 564         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 565                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 566                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 567                         return -EINVAL;
 568         }
 569
 570         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 571                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 572                 int err = nla_parse_nested(
 573                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 574                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 575                                 nl80211_key_default_policy);
 576                 if (err)
 577                         return err;
 578
 579                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 580                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 581         }
 582
 583         return 0;
 584 }
 585
 586 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 587 {
 588         int err;
 589
 590         memset(k, 0, sizeof(*k));
 591         k->idx = -1;
 592         k->type = -1;
 593
 594         if (info->attrs[NL80211_ATTR_KEY])
 595                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 596         else
 597                 err = nl80211_parse_key_old(info, k);
 598
 599         if (err)
 600                 return err;
 601
 602         if (k->def && k->defmgmt)
 603                 return -EINVAL;
 604
 605         if (k->defmgmt) {
 606                 if (k->def_uni || !k->def_multi)
 607                         return -EINVAL;
 608         }
 609
 610         if (k->idx != -1) {
 611                 if (k->defmgmt) {
 612                         if (k->idx < 4 || k->idx > 5)
 613                                 return -EINVAL;
 614                 } else if (k->def) {
 615                         if (k->idx < 0 || k->idx > 3)
 616                                 return -EINVAL;
 617                 } else {
 618                         if (k->idx < 0 || k->idx > 5)
 619                                 return -EINVAL;
 620                 }
 621         }
 622
 623         return 0;
 624 }
 625
 626 static struct cfg80211_cached_keys *
 627 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 628                        struct nlattr *keys)
 629 {
 630         struct key_parse parse;
 631         struct nlattr *key;
 632         struct cfg80211_cached_keys *result;
 633         int rem, err, def = 0;
 634
 635         result = kzalloc(sizeof(*result), GFP_KERNEL);
 636         if (!result)
 637                 return ERR_PTR(-ENOMEM);
 638
 639         result->def = -1;
 640         result->defmgmt = -1;
 641
 642         nla_for_each_nested(key, keys, rem) {
 643                 memset(&parse, 0, sizeof(parse));
 644                 parse.idx = -1;
 645
 646                 err = nl80211_parse_key_new(key, &parse);
 647                 if (err)
 648                         goto error;
 649                 err = -EINVAL;
 650                 if (!parse.p.key)
 651                         goto error;
 652                 if (parse.idx < 0 || parse.idx > 4)
 653                         goto error;
 654                 if (parse.def) {
 655                         if (def)
 656                                 goto error;
 657                         def = 1;
 658                         result->def = parse.idx;
 659                         if (!parse.def_uni || !parse.def_multi)
 660                                 goto error;
 661                 } else if (parse.defmgmt)
 662                         goto error;
 663                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 664                                                      parse.idx, false, NULL);
 665                 if (err)
 666                         goto error;
 667                 result->params[parse.idx].cipher = parse.p.cipher;
 668                 result->params[parse.idx].key_len = parse.p.key_len;
 669                 result->params[parse.idx].key = result->data[parse.idx];
 670                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 671         }
 672
 673         return result;
 674  error:
 675         kfree(result);
 676         return ERR_PTR(err);
 677 }
 678
 679 static int nl80211_key_allowed(struct wireless_dev *wdev)
 680 {
 681         ASSERT_WDEV_LOCK(wdev);
 682
 683         switch (wdev->iftype) {
 684         case NL80211_IFTYPE_AP:
 685         case NL80211_IFTYPE_AP_VLAN:
 686         case NL80211_IFTYPE_P2P_GO:
 687         case NL80211_IFTYPE_MESH_POINT:
 688                 break;
 689         case NL80211_IFTYPE_ADHOC:
 690                 if (!wdev->current_bss)
 691                         return -ENOLINK;
 692                 break;
 693         case NL80211_IFTYPE_STATION:
 694         case NL80211_IFTYPE_P2P_CLIENT:
 695                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 696                         return -ENOLINK;
 697                 break;
 698         default:
 699                 return -EINVAL;
 700         }
 701
 702         return 0;
 703 }
 704
 705 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 706 {
 707         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 708         int i;
 709
 710         if (!nl_modes)
 711                 goto nla_put_failure;
 712
 713         i = 0;
 714         while (ifmodes) {
 715                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 716                         goto nla_put_failure;
 717                 ifmodes >>= 1;
 718                 i++;
 719         }
 720
 721         nla_nest_end(msg, nl_modes);
 722         return 0;
 723
 724 nla_put_failure:
 725         return -ENOBUFS;
 726 }
 727
 728 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 729                                           struct sk_buff *msg)
 730 {
 731         struct nlattr *nl_combis;
 732         int i, j;
 733
 734         nl_combis = nla_nest_start(msg,
 735                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 736         if (!nl_combis)
 737                 goto nla_put_failure;
 738
 739         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 740                 const struct ieee80211_iface_combination *c;
 741                 struct nlattr *nl_combi, *nl_limits;
 742
 743                 c = &wiphy->iface_combinations[i];
 744
 745                 nl_combi = nla_nest_start(msg, i + 1);
 746                 if (!nl_combi)
 747                         goto nla_put_failure;
 748
 749                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 750                 if (!nl_limits)
 751                         goto nla_put_failure;
 752
 753                 for (j = 0; j < c->n_limits; j++) {
 754                         struct nlattr *nl_limit;
 755
 756                         nl_limit = nla_nest_start(msg, j + 1);
 757                         if (!nl_limit)
 758                                 goto nla_put_failure;
 759                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 760                                         c->limits[j].max))
 761                                 goto nla_put_failure;
 762                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 763                                                 c->limits[j].types))
 764                                 goto nla_put_failure;
 765                         nla_nest_end(msg, nl_limit);
 766                 }
 767
 768                 nla_nest_end(msg, nl_limits);
 769
 770                 if (c->beacon_int_infra_match &&
 771                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 772                         goto nla_put_failure;
 773                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 774                                 c->num_different_channels) ||
 775                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 776                                 c->max_interfaces))
 777                         goto nla_put_failure;
 778
 779                 nla_nest_end(msg, nl_combi);
 780         }
 781
 782         nla_nest_end(msg, nl_combis);
 783
 784         return 0;
 785 nla_put_failure:
 786         return -ENOBUFS;
 787 }
 788
 789 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 790                               struct cfg80211_registered_device *dev)
 791 {
 792         void *hdr;
 793         struct nlattr *nl_bands, *nl_band;
 794         struct nlattr *nl_freqs, *nl_freq;
 795         struct nlattr *nl_rates, *nl_rate;
 796         struct nlattr *nl_cmds;
 797         enum ieee80211_band band;
 798         struct ieee80211_channel *chan;
 799         struct ieee80211_rate *rate;
 800         int i;
 801         const struct ieee80211_txrx_stypes *mgmt_stypes =
 802                                 dev->wiphy.mgmt_stypes;
 803
 804         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 805         if (!hdr)
 806                 return -1;
 807
 808         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 809             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 810             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 811                         cfg80211_rdev_list_generation) ||
 812             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 813                        dev->wiphy.retry_short) ||
 814             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 815                        dev->wiphy.retry_long) ||
 816             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 817                         dev->wiphy.frag_threshold) ||
 818             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 819                         dev->wiphy.rts_threshold) ||
 820             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 821                        dev->wiphy.coverage_class) ||
 822             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 823                        dev->wiphy.max_scan_ssids) ||
 824             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 825                        dev->wiphy.max_sched_scan_ssids) ||
 826             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 827                         dev->wiphy.max_scan_ie_len) ||
 828             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 829                         dev->wiphy.max_sched_scan_ie_len) ||
 830             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 831                        dev->wiphy.max_match_sets))
 832                 goto nla_put_failure;
 833
 834         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 835             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 836                 goto nla_put_failure;
 837         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 838             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 839                 goto nla_put_failure;
 840         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 841             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 842                 goto nla_put_failure;
 843         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 844             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 845                 goto nla_put_failure;
 846         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 847             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 848                 goto nla_put_failure;
 849         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 850             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 851                 goto nla_put_failure;
 852
 853         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 854                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 855                     dev->wiphy.cipher_suites))
 856                 goto nla_put_failure;
 857
 858         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 859                        dev->wiphy.max_num_pmkids))
 860                 goto nla_put_failure;
 861
 862         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 863             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 864                 goto nla_put_failure;
 865
 866         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 867                         dev->wiphy.available_antennas_tx) ||
 868             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 869                         dev->wiphy.available_antennas_rx))
 870                 goto nla_put_failure;
 871
 872         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 873             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 874                         dev->wiphy.probe_resp_offload))
 875                 goto nla_put_failure;
 876
 877         if ((dev->wiphy.available_antennas_tx ||
 878              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 879                 u32 tx_ant = 0, rx_ant = 0;
 880                 int res;
 881                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 882                 if (!res) {
 883                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 884                                         tx_ant) ||
 885                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 886                                         rx_ant))
 887                                 goto nla_put_failure;
 888                 }
 889         }
 890
 891         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 892                                 dev->wiphy.interface_modes))
 893                 goto nla_put_failure;
 894
 895         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 896         if (!nl_bands)
 897                 goto nla_put_failure;
 898
 899         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 900                 if (!dev->wiphy.bands[band])
 901                         continue;
 902
 903                 nl_band = nla_nest_start(msg, band);
 904                 if (!nl_band)
 905                         goto nla_put_failure;
 906
 907                 /* add HT info */
 908                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 909                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 910                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 911                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 912                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 913                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 914                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 915                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 916                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 917                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 918                         goto nla_put_failure;
 919
 920                 /* add frequencies */
 921                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 922                 if (!nl_freqs)
 923                         goto nla_put_failure;
 924
 925                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 926                         nl_freq = nla_nest_start(msg, i);
 927                         if (!nl_freq)
 928                                 goto nla_put_failure;
 929
 930                         chan = &dev->wiphy.bands[band]->channels[i];
 931
 932                         if (nl80211_msg_put_channel(msg, chan))
 933                                 goto nla_put_failure;
 934
 935                         nla_nest_end(msg, nl_freq);
 936                 }
 937
 938                 nla_nest_end(msg, nl_freqs);
 939
 940                 /* add bitrates */
 941                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 942                 if (!nl_rates)
 943                         goto nla_put_failure;
 944
 945                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 946                         nl_rate = nla_nest_start(msg, i);
 947                         if (!nl_rate)
 948                                 goto nla_put_failure;
 949
 950                         rate = &dev->wiphy.bands[band]->bitrates[i];
 951                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 952                                         rate->bitrate))
 953                                 goto nla_put_failure;
 954                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 955                             nla_put_flag(msg,
 956                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 957                                 goto nla_put_failure;
 958
 959                         nla_nest_end(msg, nl_rate);
 960                 }
 961
 962                 nla_nest_end(msg, nl_rates);
 963
 964                 nla_nest_end(msg, nl_band);
 965         }
 966         nla_nest_end(msg, nl_bands);
 967
 968         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 969         if (!nl_cmds)
 970                 goto nla_put_failure;
 971
 972         i = 0;
 973 #define CMD(op, n)                                              \
 974          do {                                                   \
 975                 if (dev->ops->op) {                             \
 976                         i++;                                    \
 977                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 978                                 goto nla_put_failure;           \
 979                 }                                               \
 980         } while (0)
 981
 982         CMD(add_virtual_intf, NEW_INTERFACE);
 983         CMD(change_virtual_intf, SET_INTERFACE);
 984         CMD(add_key, NEW_KEY);
 985         CMD(start_ap, START_AP);
 986         CMD(add_station, NEW_STATION);
 987         CMD(add_mpath, NEW_MPATH);
 988         CMD(update_mesh_config, SET_MESH_CONFIG);
 989         CMD(change_bss, SET_BSS);
 990         CMD(auth, AUTHENTICATE);
 991         CMD(assoc, ASSOCIATE);
 992         CMD(deauth, DEAUTHENTICATE);
 993         CMD(disassoc, DISASSOCIATE);
 994         CMD(join_ibss, JOIN_IBSS);
 995         CMD(join_mesh, JOIN_MESH);
 996         CMD(set_pmksa, SET_PMKSA);
 997         CMD(del_pmksa, DEL_PMKSA);
 998         CMD(flush_pmksa, FLUSH_PMKSA);
 999         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1000                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1001         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1002         CMD(mgmt_tx, FRAME);
1003         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1004         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1005                 i++;
1006                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1007                         goto nla_put_failure;
1008         }
1009         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1010             dev->ops->join_mesh) {
1011                 i++;
1012                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1013                         goto nla_put_failure;
1014         }
1015         CMD(set_wds_peer, SET_WDS_PEER);
1016         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1017                 CMD(tdls_mgmt, TDLS_MGMT);
1018                 CMD(tdls_oper, TDLS_OPER);
1019         }
1020         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1021                 CMD(sched_scan_start, START_SCHED_SCAN);
1022         CMD(probe_client, PROBE_CLIENT);
1023         CMD(set_noack_map, SET_NOACK_MAP);
1024         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1025                 i++;
1026                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1027                         goto nla_put_failure;
1028         }
1029
1030 #ifdef CONFIG_NL80211_TESTMODE
1031         CMD(testmode_cmd, TESTMODE);
1032 #endif
1033
1034 #undef CMD
1035
1036         if (dev->ops->connect || dev->ops->auth) {
1037                 i++;
1038                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1039                         goto nla_put_failure;
1040         }
1041
1042         if (dev->ops->disconnect || dev->ops->deauth) {
1043                 i++;
1044                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1045                         goto nla_put_failure;
1046         }
1047
1048         nla_nest_end(msg, nl_cmds);
1049
1050         if (dev->ops->remain_on_channel &&
1051             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1052             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1053                         dev->wiphy.max_remain_on_channel_duration))
1054                 goto nla_put_failure;
1055
1056         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1057             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1058                 goto nla_put_failure;
1059
1060         if (mgmt_stypes) {
1061                 u16 stypes;
1062                 struct nlattr *nl_ftypes, *nl_ifs;
1063                 enum nl80211_iftype ift;
1064
1065                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1066                 if (!nl_ifs)
1067                         goto nla_put_failure;
1068
1069                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1070                         nl_ftypes = nla_nest_start(msg, ift);
1071                         if (!nl_ftypes)
1072                                 goto nla_put_failure;
1073                         i = 0;
1074                         stypes = mgmt_stypes[ift].tx;
1075                         while (stypes) {
1076                                 if ((stypes & 1) &&
1077                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1078                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1079                                         goto nla_put_failure;
1080                                 stypes >>= 1;
1081                                 i++;
1082                         }
1083                         nla_nest_end(msg, nl_ftypes);
1084                 }
1085
1086                 nla_nest_end(msg, nl_ifs);
1087
1088                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1089                 if (!nl_ifs)
1090                         goto nla_put_failure;
1091
1092                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1093                         nl_ftypes = nla_nest_start(msg, ift);
1094                         if (!nl_ftypes)
1095                                 goto nla_put_failure;
1096                         i = 0;
1097                         stypes = mgmt_stypes[ift].rx;
1098                         while (stypes) {
1099                                 if ((stypes & 1) &&
1100                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1101                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1102                                         goto nla_put_failure;
1103                                 stypes >>= 1;
1104                                 i++;
1105                         }
1106                         nla_nest_end(msg, nl_ftypes);
1107                 }
1108                 nla_nest_end(msg, nl_ifs);
1109         }
1110
1111         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1112                 struct nlattr *nl_wowlan;
1113
1114                 nl_wowlan = nla_nest_start(msg,
1115                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1116                 if (!nl_wowlan)
1117                         goto nla_put_failure;
1118
1119                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1120                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1121                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1122                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1123                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1124                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1125                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1126                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1127                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1128                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1129                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1130                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1131                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1132                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1133                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1134                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1135                     goto nla_put_failure;
1136                 if (dev->wiphy.wowlan.n_patterns) {
1137                         struct nl80211_wowlan_pattern_support pat = {
1138                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1139                                 .min_pattern_len =
1140                                         dev->wiphy.wowlan.pattern_min_len,
1141                                 .max_pattern_len =
1142                                         dev->wiphy.wowlan.pattern_max_len,
1143                         };
1144                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1145                                     sizeof(pat), &pat))
1146                                 goto nla_put_failure;
1147                 }
1148
1149                 nla_nest_end(msg, nl_wowlan);
1150         }
1151
1152         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1153                                 dev->wiphy.software_iftypes))
1154                 goto nla_put_failure;
1155
1156         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1157                 goto nla_put_failure;
1158
1159         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1160             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1161                         dev->wiphy.ap_sme_capa))
1162                 goto nla_put_failure;
1163
1164         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1165                         dev->wiphy.features))
1166                 goto nla_put_failure;
1167
1168         if (dev->wiphy.ht_capa_mod_mask &&
1169             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1170                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1171                     dev->wiphy.ht_capa_mod_mask))
1172                 goto nla_put_failure;
1173
1174         return genlmsg_end(msg, hdr);
1175
1176  nla_put_failure:
1177         genlmsg_cancel(msg, hdr);
1178         return -EMSGSIZE;
1179 }
1180
1181 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1182 {
1183         int idx = 0;
1184         int start = cb->args[0];
1185         struct cfg80211_registered_device *dev;
1186
1187         mutex_lock(&cfg80211_mutex);
1188         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1189                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1190                         continue;
1191                 if (++idx <= start)
1192                         continue;
1193                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1194                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1195                                        dev) < 0) {
1196                         idx--;
1197                         break;
1198                 }
1199         }
1200         mutex_unlock(&cfg80211_mutex);
1201
1202         cb->args[0] = idx;
1203
1204         return skb->len;
1205 }
1206
1207 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1208 {
1209         struct sk_buff *msg;
1210         struct cfg80211_registered_device *dev = info->user_ptr[0];
1211
1212         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1213         if (!msg)
1214                 return -ENOMEM;
1215
1216         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1217                 nlmsg_free(msg);
1218                 return -ENOBUFS;
1219         }
1220
1221         return genlmsg_reply(msg, info);
1222 }
1223
1224 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1225         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1226         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1227         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1228         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1229         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1230 };
1231
1232 static int parse_txq_params(struct nlattr *tb[],
1233                             struct ieee80211_txq_params *txq_params)
1234 {
1235         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1236             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1237             !tb[NL80211_TXQ_ATTR_AIFS])
1238                 return -EINVAL;
1239
1240         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1241         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1242         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1243         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1244         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1245
1246         if (txq_params->ac >= NL80211_NUM_ACS)
1247                 return -EINVAL;
1248
1249         return 0;
1250 }
1251
1252 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1253 {
1254         /*
1255          * You can only set the channel explicitly for WDS interfaces,
1256          * all others have their channel managed via their respective
1257          * "establish a connection" command (connect, join, ...)
1258          *
1259          * For AP/GO and mesh mode, the channel can be set with the
1260          * channel userspace API, but is only stored and passed to the
1261          * low-level driver when the AP starts or the mesh is joined.
1262          * This is for backward compatibility, userspace can also give
1263          * the channel in the start-ap or join-mesh commands instead.
1264          *
1265          * Monitors are special as they are normally slaved to
1266          * whatever else is going on, so they have their own special
1267          * operation to set the monitor channel if possible.
1268          */
1269         return !wdev ||
1270                 wdev->iftype == NL80211_IFTYPE_AP ||
1271                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1272                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1273                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1274 }
1275
1276 static bool nl80211_valid_channel_type(struct genl_info *info,
1277                                        enum nl80211_channel_type *channel_type)
1278 {
1279         enum nl80211_channel_type tmp;
1280
1281         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1282                 return false;
1283
1284         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1285         if (tmp != NL80211_CHAN_NO_HT &&
1286             tmp != NL80211_CHAN_HT20 &&
1287             tmp != NL80211_CHAN_HT40PLUS &&
1288             tmp != NL80211_CHAN_HT40MINUS)
1289                 return false;
1290
1291         if (channel_type)
1292                 *channel_type = tmp;
1293
1294         return true;
1295 }
1296
1297 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1298                                  struct wireless_dev *wdev,
1299                                  struct genl_info *info)
1300 {
1301         struct ieee80211_channel *channel;
1302         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1303         u32 freq;
1304         int result;
1305         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1306
1307         if (wdev)
1308                 iftype = wdev->iftype;
1309
1310         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1311                 return -EINVAL;
1312
1313         if (!nl80211_can_set_dev_channel(wdev))
1314                 return -EOPNOTSUPP;
1315
1316         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1317             !nl80211_valid_channel_type(info, &channel_type))
1318                 return -EINVAL;
1319
1320         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1321
1322         mutex_lock(&rdev->devlist_mtx);
1323         switch (iftype) {
1324         case NL80211_IFTYPE_AP:
1325         case NL80211_IFTYPE_P2P_GO:
1326                 if (wdev->beacon_interval) {
1327                         result = -EBUSY;
1328                         break;
1329                 }
1330                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1331                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1332                                                               channel,
1333                                                               channel_type)) {
1334                         result = -EINVAL;
1335                         break;
1336                 }
1337                 wdev->preset_chan = channel;
1338                 wdev->preset_chantype = channel_type;
1339                 result = 0;
1340                 break;
1341         case NL80211_IFTYPE_MESH_POINT:
1342                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1343                 break;
1344         case NL80211_IFTYPE_MONITOR:
1345                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1346                 break;
1347         default:
1348                 result = -EINVAL;
1349         }
1350         mutex_unlock(&rdev->devlist_mtx);
1351
1352         return result;
1353 }
1354
1355 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1356 {
1357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1358         struct net_device *netdev = info->user_ptr[1];
1359
1360         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1361 }
1362
1363 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1364 {
1365         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1366         struct net_device *dev = info->user_ptr[1];
1367         struct wireless_dev *wdev = dev->ieee80211_ptr;
1368         const u8 *bssid;
1369
1370         if (!info->attrs[NL80211_ATTR_MAC])
1371                 return -EINVAL;
1372
1373         if (netif_running(dev))
1374                 return -EBUSY;
1375
1376         if (!rdev->ops->set_wds_peer)
1377                 return -EOPNOTSUPP;
1378
1379         if (wdev->iftype != NL80211_IFTYPE_WDS)
1380                 return -EOPNOTSUPP;
1381
1382         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1383         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1384 }
1385
1386
1387 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1388 {
1389         struct cfg80211_registered_device *rdev;
1390         struct net_device *netdev = NULL;
1391         struct wireless_dev *wdev;
1392         int result = 0, rem_txq_params = 0;
1393         struct nlattr *nl_txq_params;
1394         u32 changed;
1395         u8 retry_short = 0, retry_long = 0;
1396         u32 frag_threshold = 0, rts_threshold = 0;
1397         u8 coverage_class = 0;
1398
1399         /*
1400          * Try to find the wiphy and netdev. Normally this
1401          * function shouldn't need the netdev, but this is
1402          * done for backward compatibility -- previously
1403          * setting the channel was done per wiphy, but now
1404          * it is per netdev. Previous userland like hostapd
1405          * also passed a netdev to set_wiphy, so that it is
1406          * possible to let that go to the right netdev!
1407          */
1408         mutex_lock(&cfg80211_mutex);
1409
1410         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1411                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1412
1413                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1414                 if (netdev && netdev->ieee80211_ptr) {
1415                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1416                         mutex_lock(&rdev->mtx);
1417                 } else
1418                         netdev = NULL;
1419         }
1420
1421         if (!netdev) {
1422                 rdev = __cfg80211_rdev_from_info(info);
1423                 if (IS_ERR(rdev)) {
1424                         mutex_unlock(&cfg80211_mutex);
1425                         return PTR_ERR(rdev);
1426                 }
1427                 wdev = NULL;
1428                 netdev = NULL;
1429                 result = 0;
1430
1431                 mutex_lock(&rdev->mtx);
1432         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1433                 wdev = netdev->ieee80211_ptr;
1434         else
1435                 wdev = NULL;
1436
1437         /*
1438          * end workaround code, by now the rdev is available
1439          * and locked, and wdev may or may not be NULL.
1440          */
1441
1442         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1443                 result = cfg80211_dev_rename(
1444                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1445
1446         mutex_unlock(&cfg80211_mutex);
1447
1448         if (result)
1449                 goto bad_res;
1450
1451         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1452                 struct ieee80211_txq_params txq_params;
1453                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1454
1455                 if (!rdev->ops->set_txq_params) {
1456                         result = -EOPNOTSUPP;
1457                         goto bad_res;
1458                 }
1459
1460                 if (!netdev) {
1461                         result = -EINVAL;
1462                         goto bad_res;
1463                 }
1464
1465                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1466                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1467                         result = -EINVAL;
1468                         goto bad_res;
1469                 }
1470
1471                 if (!netif_running(netdev)) {
1472                         result = -ENETDOWN;
1473                         goto bad_res;
1474                 }
1475
1476                 nla_for_each_nested(nl_txq_params,
1477                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1478                                     rem_txq_params) {
1479                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1480                                   nla_data(nl_txq_params),
1481                                   nla_len(nl_txq_params),
1482                                   txq_params_policy);
1483                         result = parse_txq_params(tb, &txq_params);
1484                         if (result)
1485                                 goto bad_res;
1486
1487                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1488                                                            netdev,
1489                                                            &txq_params);
1490                         if (result)
1491                                 goto bad_res;
1492                 }
1493         }
1494
1495         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1496                 result = __nl80211_set_channel(rdev, wdev, info);
1497                 if (result)
1498                         goto bad_res;
1499         }
1500
1501         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1502                 enum nl80211_tx_power_setting type;
1503                 int idx, mbm = 0;
1504
1505                 if (!rdev->ops->set_tx_power) {
1506                         result = -EOPNOTSUPP;
1507                         goto bad_res;
1508                 }
1509
1510                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1511                 type = nla_get_u32(info->attrs[idx]);
1512
1513                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1514                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1515                         result = -EINVAL;
1516                         goto bad_res;
1517                 }
1518
1519                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1520                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1521                         mbm = nla_get_u32(info->attrs[idx]);
1522                 }
1523
1524                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1525                 if (result)
1526                         goto bad_res;
1527         }
1528
1529         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1530             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1531                 u32 tx_ant, rx_ant;
1532                 if ((!rdev->wiphy.available_antennas_tx &&
1533                      !rdev->wiphy.available_antennas_rx) ||
1534                     !rdev->ops->set_antenna) {
1535                         result = -EOPNOTSUPP;
1536                         goto bad_res;
1537                 }
1538
1539                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1540                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1541
1542                 /* reject antenna configurations which don't match the
1543                  * available antenna masks, except for the "all" mask */
1544                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1545                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1546                         result = -EINVAL;
1547                         goto bad_res;
1548                 }
1549
1550                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1551                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1552
1553                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1554                 if (result)
1555                         goto bad_res;
1556         }
1557
1558         changed = 0;
1559
1560         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1561                 retry_short = nla_get_u8(
1562                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1563                 if (retry_short == 0) {
1564                         result = -EINVAL;
1565                         goto bad_res;
1566                 }
1567                 changed |= WIPHY_PARAM_RETRY_SHORT;
1568         }
1569
1570         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1571                 retry_long = nla_get_u8(
1572                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1573                 if (retry_long == 0) {
1574                         result = -EINVAL;
1575                         goto bad_res;
1576                 }
1577                 changed |= WIPHY_PARAM_RETRY_LONG;
1578         }
1579
1580         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1581                 frag_threshold = nla_get_u32(
1582                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1583                 if (frag_threshold < 256) {
1584                         result = -EINVAL;
1585                         goto bad_res;
1586                 }
1587                 if (frag_threshold != (u32) -1) {
1588                         /*
1589                          * Fragments (apart from the last one) are required to
1590                          * have even length. Make the fragmentation code
1591                          * simpler by stripping LSB should someone try to use
1592                          * odd threshold value.
1593                          */
1594                         frag_threshold &= ~0x1;
1595                 }
1596                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1597         }
1598
1599         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1600                 rts_threshold = nla_get_u32(
1601                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1602                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1603         }
1604
1605         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1606                 coverage_class = nla_get_u8(
1607                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1608                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1609         }
1610
1611         if (changed) {
1612                 u8 old_retry_short, old_retry_long;
1613                 u32 old_frag_threshold, old_rts_threshold;
1614                 u8 old_coverage_class;
1615
1616                 if (!rdev->ops->set_wiphy_params) {
1617                         result = -EOPNOTSUPP;
1618                         goto bad_res;
1619                 }
1620
1621                 old_retry_short = rdev->wiphy.retry_short;
1622                 old_retry_long = rdev->wiphy.retry_long;
1623                 old_frag_threshold = rdev->wiphy.frag_threshold;
1624                 old_rts_threshold = rdev->wiphy.rts_threshold;
1625                 old_coverage_class = rdev->wiphy.coverage_class;
1626
1627                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1628                         rdev->wiphy.retry_short = retry_short;
1629                 if (changed & WIPHY_PARAM_RETRY_LONG)
1630                         rdev->wiphy.retry_long = retry_long;
1631                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1632                         rdev->wiphy.frag_threshold = frag_threshold;
1633                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1634                         rdev->wiphy.rts_threshold = rts_threshold;
1635                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1636                         rdev->wiphy.coverage_class = coverage_class;
1637
1638                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1639                 if (result) {
1640                         rdev->wiphy.retry_short = old_retry_short;
1641                         rdev->wiphy.retry_long = old_retry_long;
1642                         rdev->wiphy.frag_threshold = old_frag_threshold;
1643                         rdev->wiphy.rts_threshold = old_rts_threshold;
1644                         rdev->wiphy.coverage_class = old_coverage_class;
1645                 }
1646         }
1647
1648  bad_res:
1649         mutex_unlock(&rdev->mtx);
1650         if (netdev)
1651                 dev_put(netdev);
1652         return result;
1653 }
1654
1655
1656 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1657                               struct cfg80211_registered_device *rdev,
1658                               struct net_device *dev)
1659 {
1660         void *hdr;
1661
1662         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1663         if (!hdr)
1664                 return -1;
1665
1666         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1667             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1668             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1669             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1670                         dev->ieee80211_ptr->iftype) ||
1671             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1672                         rdev->devlist_generation ^
1673                         (cfg80211_rdev_list_generation << 2)))
1674                 goto nla_put_failure;
1675
1676         if (rdev->ops->get_channel) {
1677                 struct ieee80211_channel *chan;
1678                 enum nl80211_channel_type channel_type;
1679
1680                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1681                 if (chan &&
1682                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1683                                     chan->center_freq) ||
1684                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1685                                     channel_type)))
1686                         goto nla_put_failure;
1687         }
1688
1689         return genlmsg_end(msg, hdr);
1690
1691  nla_put_failure:
1692         genlmsg_cancel(msg, hdr);
1693         return -EMSGSIZE;
1694 }
1695
1696 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1697 {
1698         int wp_idx = 0;
1699         int if_idx = 0;
1700         int wp_start = cb->args[0];
1701         int if_start = cb->args[1];
1702         struct cfg80211_registered_device *rdev;
1703         struct wireless_dev *wdev;
1704
1705         mutex_lock(&cfg80211_mutex);
1706         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1707                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1708                         continue;
1709                 if (wp_idx < wp_start) {
1710                         wp_idx++;
1711                         continue;
1712                 }
1713                 if_idx = 0;
1714
1715                 mutex_lock(&rdev->devlist_mtx);
1716                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1717                         if (if_idx < if_start) {
1718                                 if_idx++;
1719                                 continue;
1720                         }
1721                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1722                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1723                                                rdev, wdev->netdev) < 0) {
1724                                 mutex_unlock(&rdev->devlist_mtx);
1725                                 goto out;
1726                         }
1727                         if_idx++;
1728                 }
1729                 mutex_unlock(&rdev->devlist_mtx);
1730
1731                 wp_idx++;
1732         }
1733  out:
1734         mutex_unlock(&cfg80211_mutex);
1735
1736         cb->args[0] = wp_idx;
1737         cb->args[1] = if_idx;
1738
1739         return skb->len;
1740 }
1741
1742 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1743 {
1744         struct sk_buff *msg;
1745         struct cfg80211_registered_device *dev = info->user_ptr[0];
1746         struct net_device *netdev = info->user_ptr[1];
1747
1748         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1749         if (!msg)
1750                 return -ENOMEM;
1751
1752         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1753                                dev, netdev) < 0) {
1754                 nlmsg_free(msg);
1755                 return -ENOBUFS;
1756         }
1757
1758         return genlmsg_reply(msg, info);
1759 }
1760
1761 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1762         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1763         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1764         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1765         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1766         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1767 };
1768
1769 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1770 {
1771         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1772         int flag;
1773
1774         *mntrflags = 0;
1775
1776         if (!nla)
1777                 return -EINVAL;
1778
1779         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1780                              nla, mntr_flags_policy))
1781                 return -EINVAL;
1782
1783         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1784                 if (flags[flag])
1785                         *mntrflags |= (1<<flag);
1786
1787         return 0;
1788 }
1789
1790 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1791                                struct net_device *netdev, u8 use_4addr,
1792                                enum nl80211_iftype iftype)
1793 {
1794         if (!use_4addr) {
1795                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1796                         return -EBUSY;
1797                 return 0;
1798         }
1799
1800         switch (iftype) {
1801         case NL80211_IFTYPE_AP_VLAN:
1802                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1803                         return 0;
1804                 break;
1805         case NL80211_IFTYPE_STATION:
1806                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1807                         return 0;
1808                 break;
1809         default:
1810                 break;
1811         }
1812
1813         return -EOPNOTSUPP;
1814 }
1815
1816 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1817 {
1818         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1819         struct vif_params params;
1820         int err;
1821         enum nl80211_iftype otype, ntype;
1822         struct net_device *dev = info->user_ptr[1];
1823         u32 _flags, *flags = NULL;
1824         bool change = false;
1825
1826         memset(&params, 0, sizeof(params));
1827
1828         otype = ntype = dev->ieee80211_ptr->iftype;
1829
1830         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1831                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1832                 if (otype != ntype)
1833                         change = true;
1834                 if (ntype > NL80211_IFTYPE_MAX)
1835                         return -EINVAL;
1836         }
1837
1838         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1839                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1840
1841                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1842                         return -EINVAL;
1843                 if (netif_running(dev))
1844                         return -EBUSY;
1845
1846                 wdev_lock(wdev);
1847                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1848                              IEEE80211_MAX_MESH_ID_LEN);
1849                 wdev->mesh_id_up_len =
1850                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1851                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1852                        wdev->mesh_id_up_len);
1853                 wdev_unlock(wdev);
1854         }
1855
1856         if (info->attrs[NL80211_ATTR_4ADDR]) {
1857                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1858                 change = true;
1859                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1860                 if (err)
1861                         return err;
1862         } else {
1863                 params.use_4addr = -1;
1864         }
1865
1866         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1867                 if (ntype != NL80211_IFTYPE_MONITOR)
1868                         return -EINVAL;
1869                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1870                                           &_flags);
1871                 if (err)
1872                         return err;
1873
1874                 flags = &_flags;
1875                 change = true;
1876         }
1877
1878         if (change)
1879                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1880         else
1881                 err = 0;
1882
1883         if (!err && params.use_4addr != -1)
1884                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1885
1886         return err;
1887 }
1888
1889 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1890 {
1891         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1892         struct vif_params params;
1893         struct net_device *dev;
1894         int err;
1895         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1896         u32 flags;
1897
1898         memset(&params, 0, sizeof(params));
1899
1900         if (!info->attrs[NL80211_ATTR_IFNAME])
1901                 return -EINVAL;
1902
1903         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1904                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1905                 if (type > NL80211_IFTYPE_MAX)
1906                         return -EINVAL;
1907         }
1908
1909         if (!rdev->ops->add_virtual_intf ||
1910             !(rdev->wiphy.interface_modes & (1 << type)))
1911                 return -EOPNOTSUPP;
1912
1913         if (info->attrs[NL80211_ATTR_4ADDR]) {
1914                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1915                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1916                 if (err)
1917                         return err;
1918         }
1919
1920         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1921                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1922                                   &flags);
1923         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1924                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1925                 type, err ? NULL : &flags, &params);
1926         if (IS_ERR(dev))
1927                 return PTR_ERR(dev);
1928
1929         if (type == NL80211_IFTYPE_MESH_POINT &&
1930             info->attrs[NL80211_ATTR_MESH_ID]) {
1931                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1932
1933                 wdev_lock(wdev);
1934                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1935                              IEEE80211_MAX_MESH_ID_LEN);
1936                 wdev->mesh_id_up_len =
1937                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1938                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1939                        wdev->mesh_id_up_len);
1940                 wdev_unlock(wdev);
1941         }
1942
1943         return 0;
1944 }
1945
1946 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1947 {
1948         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1949         struct net_device *dev = info->user_ptr[1];
1950
1951         if (!rdev->ops->del_virtual_intf)
1952                 return -EOPNOTSUPP;
1953
1954         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1955 }
1956
1957 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1958 {
1959         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1960         struct net_device *dev = info->user_ptr[1];
1961         u16 noack_map;
1962
1963         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1964                 return -EINVAL;
1965
1966         if (!rdev->ops->set_noack_map)
1967                 return -EOPNOTSUPP;
1968
1969         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1970
1971         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1972 }
1973
1974 struct get_key_cookie {
1975         struct sk_buff *msg;
1976         int error;
1977         int idx;
1978 };
1979
1980 static void get_key_callback(void *c, struct key_params *params)
1981 {
1982         struct nlattr *key;
1983         struct get_key_cookie *cookie = c;
1984
1985         if ((params->key &&
1986              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1987                      params->key_len, params->key)) ||
1988             (params->seq &&
1989              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1990                      params->seq_len, params->seq)) ||
1991             (params->cipher &&
1992              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1993                          params->cipher)))
1994                 goto nla_put_failure;
1995
1996         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1997         if (!key)
1998                 goto nla_put_failure;
1999
2000         if ((params->key &&
2001              nla_put(cookie->msg, NL80211_KEY_DATA,
2002                      params->key_len, params->key)) ||
2003             (params->seq &&
2004              nla_put(cookie->msg, NL80211_KEY_SEQ,
2005                      params->seq_len, params->seq)) ||
2006             (params->cipher &&
2007              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2008                          params->cipher)))
2009                 goto nla_put_failure;
2010
2011         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2012                 goto nla_put_failure;
2013
2014         nla_nest_end(cookie->msg, key);
2015
2016         return;
2017  nla_put_failure:
2018         cookie->error = 1;
2019 }
2020
2021 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2022 {
2023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2024         int err;
2025         struct net_device *dev = info->user_ptr[1];
2026         u8 key_idx = 0;
2027         const u8 *mac_addr = NULL;
2028         bool pairwise;
2029         struct get_key_cookie cookie = {
2030                 .error = 0,
2031         };
2032         void *hdr;
2033         struct sk_buff *msg;
2034
2035         if (info->attrs[NL80211_ATTR_KEY_IDX])
2036                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2037
2038         if (key_idx > 5)
2039                 return -EINVAL;
2040
2041         if (info->attrs[NL80211_ATTR_MAC])
2042                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2043
2044         pairwise = !!mac_addr;
2045         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2046                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2047                 if (kt >= NUM_NL80211_KEYTYPES)
2048                         return -EINVAL;
2049                 if (kt != NL80211_KEYTYPE_GROUP &&
2050                     kt != NL80211_KEYTYPE_PAIRWISE)
2051                         return -EINVAL;
2052                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2053         }
2054
2055         if (!rdev->ops->get_key)
2056                 return -EOPNOTSUPP;
2057
2058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2059         if (!msg)
2060                 return -ENOMEM;
2061
2062         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2063                              NL80211_CMD_NEW_KEY);
2064         if (IS_ERR(hdr))
2065                 return PTR_ERR(hdr);
2066
2067         cookie.msg = msg;
2068         cookie.idx = key_idx;
2069
2070         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2071             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2072                 goto nla_put_failure;
2073         if (mac_addr &&
2074             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2075                 goto nla_put_failure;
2076
2077         if (pairwise && mac_addr &&
2078             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2079                 return -ENOENT;
2080
2081         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2082                                  mac_addr, &cookie, get_key_callback);
2083
2084         if (err)
2085                 goto free_msg;
2086
2087         if (cookie.error)
2088                 goto nla_put_failure;
2089
2090         genlmsg_end(msg, hdr);
2091         return genlmsg_reply(msg, info);
2092
2093  nla_put_failure:
2094         err = -ENOBUFS;
2095  free_msg:
2096         nlmsg_free(msg);
2097         return err;
2098 }
2099
2100 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2101 {
2102         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2103         struct key_parse key;
2104         int err;
2105         struct net_device *dev = info->user_ptr[1];
2106
2107         err = nl80211_parse_key(info, &key);
2108         if (err)
2109                 return err;
2110
2111         if (key.idx < 0)
2112                 return -EINVAL;
2113
2114         /* only support setting default key */
2115         if (!key.def && !key.defmgmt)
2116                 return -EINVAL;
2117
2118         wdev_lock(dev->ieee80211_ptr);
2119
2120         if (key.def) {
2121                 if (!rdev->ops->set_default_key) {
2122                         err = -EOPNOTSUPP;
2123                         goto out;
2124                 }
2125
2126                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2127                 if (err)
2128                         goto out;
2129
2130                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2131                                                  key.def_uni, key.def_multi);
2132
2133                 if (err)
2134                         goto out;
2135
2136 #ifdef CONFIG_CFG80211_WEXT
2137                 dev->ieee80211_ptr->wext.default_key = key.idx;
2138 #endif
2139         } else {
2140                 if (key.def_uni || !key.def_multi) {
2141                         err = -EINVAL;
2142                         goto out;
2143                 }
2144
2145                 if (!rdev->ops->set_default_mgmt_key) {
2146                         err = -EOPNOTSUPP;
2147                         goto out;
2148                 }
2149
2150                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2151                 if (err)
2152                         goto out;
2153
2154                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2155                                                       dev, key.idx);
2156                 if (err)
2157                         goto out;
2158
2159 #ifdef CONFIG_CFG80211_WEXT
2160                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2161 #endif
2162         }
2163
2164  out:
2165         wdev_unlock(dev->ieee80211_ptr);
2166
2167         return err;
2168 }
2169
2170 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2171 {
2172         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2173         int err;
2174         struct net_device *dev = info->user_ptr[1];
2175         struct key_parse key;
2176         const u8 *mac_addr = NULL;
2177
2178         err = nl80211_parse_key(info, &key);
2179         if (err)
2180                 return err;
2181
2182         if (!key.p.key)
2183                 return -EINVAL;
2184
2185         if (info->attrs[NL80211_ATTR_MAC])
2186                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2187
2188         if (key.type == -1) {
2189                 if (mac_addr)
2190                         key.type = NL80211_KEYTYPE_PAIRWISE;
2191                 else
2192                         key.type = NL80211_KEYTYPE_GROUP;
2193         }
2194
2195         /* for now */
2196         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2197             key.type != NL80211_KEYTYPE_GROUP)
2198                 return -EINVAL;
2199
2200         if (!rdev->ops->add_key)
2201                 return -EOPNOTSUPP;
2202
2203         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2204                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2205                                            mac_addr))
2206                 return -EINVAL;
2207
2208         wdev_lock(dev->ieee80211_ptr);
2209         err = nl80211_key_allowed(dev->ieee80211_ptr);
2210         if (!err)
2211                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2212                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2213                                          mac_addr, &key.p);
2214         wdev_unlock(dev->ieee80211_ptr);
2215
2216         return err;
2217 }
2218
2219 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2220 {
2221         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2222         int err;
2223         struct net_device *dev = info->user_ptr[1];
2224         u8 *mac_addr = NULL;
2225         struct key_parse key;
2226
2227         err = nl80211_parse_key(info, &key);
2228         if (err)
2229                 return err;
2230
2231         if (info->attrs[NL80211_ATTR_MAC])
2232                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2233
2234         if (key.type == -1) {
2235                 if (mac_addr)
2236                         key.type = NL80211_KEYTYPE_PAIRWISE;
2237                 else
2238                         key.type = NL80211_KEYTYPE_GROUP;
2239         }
2240
2241         /* for now */
2242         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2243             key.type != NL80211_KEYTYPE_GROUP)
2244                 return -EINVAL;
2245
2246         if (!rdev->ops->del_key)
2247                 return -EOPNOTSUPP;
2248
2249         wdev_lock(dev->ieee80211_ptr);
2250         err = nl80211_key_allowed(dev->ieee80211_ptr);
2251
2252         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2253             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2254                 err = -ENOENT;
2255
2256         if (!err)
2257                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2258                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2259                                          mac_addr);
2260
2261 #ifdef CONFIG_CFG80211_WEXT
2262         if (!err) {
2263                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2264                         dev->ieee80211_ptr->wext.default_key = -1;
2265                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2266                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2267         }
2268 #endif
2269         wdev_unlock(dev->ieee80211_ptr);
2270
2271         return err;
2272 }
2273
2274 static int nl80211_parse_beacon(struct genl_info *info,
2275                                 struct cfg80211_beacon_data *bcn)
2276 {
2277         bool haveinfo = false;
2278
2279         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2280             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2281             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2282             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2283                 return -EINVAL;
2284
2285         memset(bcn, 0, sizeof(*bcn));
2286
2287         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2288                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2289                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2290                 if (!bcn->head_len)
2291                         return -EINVAL;
2292                 haveinfo = true;
2293         }
2294
2295         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2296                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2297                 bcn->tail_len =
2298                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2299                 haveinfo = true;
2300         }
2301
2302         if (!haveinfo)
2303                 return -EINVAL;
2304
2305         if (info->attrs[NL80211_ATTR_IE]) {
2306                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2307                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2308         }
2309
2310         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2311                 bcn->proberesp_ies =
2312                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2313                 bcn->proberesp_ies_len =
2314                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2315         }
2316
2317         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2318                 bcn->assocresp_ies =
2319                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2320                 bcn->assocresp_ies_len =
2321                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2322         }
2323
2324         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2325                 bcn->probe_resp =
2326                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2327                 bcn->probe_resp_len =
2328                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2329         }
2330
2331         return 0;
2332 }
2333
2334 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2335 {
2336         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2337         struct net_device *dev = info->user_ptr[1];
2338         struct wireless_dev *wdev = dev->ieee80211_ptr;
2339         struct cfg80211_ap_settings params;
2340         int err;
2341
2342         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2343             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2344                 return -EOPNOTSUPP;
2345
2346         if (!rdev->ops->start_ap)
2347                 return -EOPNOTSUPP;
2348
2349         if (wdev->beacon_interval)
2350                 return -EALREADY;
2351
2352         memset(&params, 0, sizeof(params));
2353
2354         /* these are required for START_AP */
2355         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2356             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2357             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2358                 return -EINVAL;
2359
2360         err = nl80211_parse_beacon(info, &params.beacon);
2361         if (err)
2362                 return err;
2363
2364         params.beacon_interval =
2365                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2366         params.dtim_period =
2367                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2368
2369         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2370         if (err)
2371                 return err;
2372
2373         /*
2374          * In theory, some of these attributes should be required here
2375          * but since they were not used when the command was originally
2376          * added, keep them optional for old user space programs to let
2377          * them continue to work with drivers that do not need the
2378          * additional information -- drivers must check!
2379          */
2380         if (info->attrs[NL80211_ATTR_SSID]) {
2381                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2382                 params.ssid_len =
2383                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2384                 if (params.ssid_len == 0 ||
2385                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2386                         return -EINVAL;
2387         }
2388
2389         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2390                 params.hidden_ssid = nla_get_u32(
2391                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2392                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2393                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2394                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2395                         return -EINVAL;
2396         }
2397
2398         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2399
2400         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2401                 params.auth_type = nla_get_u32(
2402                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2403                 if (!nl80211_valid_auth_type(params.auth_type))
2404                         return -EINVAL;
2405         } else
2406                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2407
2408         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2409                                       NL80211_MAX_NR_CIPHER_SUITES);
2410         if (err)
2411                 return err;
2412
2413         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2414                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2415                         return -EOPNOTSUPP;
2416                 params.inactivity_timeout = nla_get_u16(
2417                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2418         }
2419
2420         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2421                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2422
2423                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2424                     !nl80211_valid_channel_type(info, &channel_type))
2425                         return -EINVAL;
2426
2427                 params.channel = rdev_freq_to_chan(rdev,
2428                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2429                         channel_type);
2430                 if (!params.channel)
2431                         return -EINVAL;
2432                 params.channel_type = channel_type;
2433         } else if (wdev->preset_chan) {
2434                 params.channel = wdev->preset_chan;
2435                 params.channel_type = wdev->preset_chantype;
2436         } else
2437                 return -EINVAL;
2438
2439         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2440                                           params.channel_type))
2441                 return -EINVAL;
2442
2443         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2444         if (!err)
2445                 wdev->beacon_interval = params.beacon_interval;
2446         return err;
2447 }
2448
2449 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2450 {
2451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2452         struct net_device *dev = info->user_ptr[1];
2453         struct wireless_dev *wdev = dev->ieee80211_ptr;
2454         struct cfg80211_beacon_data params;
2455         int err;
2456
2457         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2458             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2459                 return -EOPNOTSUPP;
2460
2461         if (!rdev->ops->change_beacon)
2462                 return -EOPNOTSUPP;
2463
2464         if (!wdev->beacon_interval)
2465                 return -EINVAL;
2466
2467         err = nl80211_parse_beacon(info, &params);
2468         if (err)
2469                 return err;
2470
2471         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2472 }
2473
2474 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2475 {
2476         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2477         struct net_device *dev = info->user_ptr[1];
2478         struct wireless_dev *wdev = dev->ieee80211_ptr;
2479         int err;
2480
2481         if (!rdev->ops->stop_ap)
2482                 return -EOPNOTSUPP;
2483
2484         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2485             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2486                 return -EOPNOTSUPP;
2487
2488         if (!wdev->beacon_interval)
2489                 return -ENOENT;
2490
2491         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2492         if (!err)
2493                 wdev->beacon_interval = 0;
2494         return err;
2495 }
2496
2497 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2498         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2499         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2500         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2501         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2502         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2503         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2504 };
2505
2506 static int parse_station_flags(struct genl_info *info,
2507                                enum nl80211_iftype iftype,
2508                                struct station_parameters *params)
2509 {
2510         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2511         struct nlattr *nla;
2512         int flag;
2513
2514         /*
2515          * Try parsing the new attribute first so userspace
2516          * can specify both for older kernels.
2517          */
2518         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2519         if (nla) {
2520                 struct nl80211_sta_flag_update *sta_flags;
2521
2522                 sta_flags = nla_data(nla);
2523                 params->sta_flags_mask = sta_flags->mask;
2524                 params->sta_flags_set = sta_flags->set;
2525                 if ((params->sta_flags_mask |
2526                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2527                         return -EINVAL;
2528                 return 0;
2529         }
2530
2531         /* if present, parse the old attribute */
2532
2533         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2534         if (!nla)
2535                 return 0;
2536
2537         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2538                              nla, sta_flags_policy))
2539                 return -EINVAL;
2540
2541         /*
2542          * Only allow certain flags for interface types so that
2543          * other attributes are silently ignored. Remember that
2544          * this is backward compatibility code with old userspace
2545          * and shouldn't be hit in other cases anyway.
2546          */
2547         switch (iftype) {
2548         case NL80211_IFTYPE_AP:
2549         case NL80211_IFTYPE_AP_VLAN:
2550         case NL80211_IFTYPE_P2P_GO:
2551                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2552                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2553                                          BIT(NL80211_STA_FLAG_WME) |
2554                                          BIT(NL80211_STA_FLAG_MFP);
2555                 break;
2556         case NL80211_IFTYPE_P2P_CLIENT:
2557         case NL80211_IFTYPE_STATION:
2558                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2559                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2560                 break;
2561         case NL80211_IFTYPE_MESH_POINT:
2562                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2563                                          BIT(NL80211_STA_FLAG_MFP) |
2564                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2565         default:
2566                 return -EINVAL;
2567         }
2568
2569         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2570                 if (flags[flag]) {
2571                         params->sta_flags_set |= (1<<flag);
2572
2573                         /* no longer support new API additions in old API */
2574                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2575                                 return -EINVAL;
2576                 }
2577         }
2578
2579         return 0;
2580 }
2581
2582 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2583                                  int attr)
2584 {
2585         struct nlattr *rate;
2586         u16 bitrate;
2587
2588         rate = nla_nest_start(msg, attr);
2589         if (!rate)
2590                 goto nla_put_failure;
2591
2592         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2593         bitrate = cfg80211_calculate_bitrate(info);
2594         if ((bitrate > 0 &&
2595              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2596             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2597              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2598             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2599              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2600             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2601              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2602                 goto nla_put_failure;
2603
2604         nla_nest_end(msg, rate);
2605         return true;
2606
2607 nla_put_failure:
2608         return false;
2609 }
2610
2611 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2612                                 int flags,
2613                                 struct cfg80211_registered_device *rdev,
2614                                 struct net_device *dev,
2615                                 const u8 *mac_addr, struct station_info *sinfo)
2616 {
2617         void *hdr;
2618         struct nlattr *sinfoattr, *bss_param;
2619
2620         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2621         if (!hdr)
2622                 return -1;
2623
2624         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2625             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2626             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2627                 goto nla_put_failure;
2628
2629         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2630         if (!sinfoattr)
2631                 goto nla_put_failure;
2632         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2633             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2634                         sinfo->connected_time))
2635                 goto nla_put_failure;
2636         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2637             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2638                         sinfo->inactive_time))
2639                 goto nla_put_failure;
2640         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2641             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2642                         sinfo->rx_bytes))
2643                 goto nla_put_failure;
2644         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2645             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2646                         sinfo->tx_bytes))
2647                 goto nla_put_failure;
2648         if ((sinfo->filled & STATION_INFO_LLID) &&
2649             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2650                 goto nla_put_failure;
2651         if ((sinfo->filled & STATION_INFO_PLID) &&
2652             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2653                 goto nla_put_failure;
2654         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2655             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2656                        sinfo->plink_state))
2657                 goto nla_put_failure;
2658         switch (rdev->wiphy.signal_type) {
2659         case CFG80211_SIGNAL_TYPE_MBM:
2660                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2661                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2662                                sinfo->signal))
2663                         goto nla_put_failure;
2664                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2665                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2666                                sinfo->signal_avg))
2667                         goto nla_put_failure;
2668                 break;
2669         default:
2670                 break;
2671         }
2672         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2673                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2674                                           NL80211_STA_INFO_TX_BITRATE))
2675                         goto nla_put_failure;
2676         }
2677         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2678                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2679                                           NL80211_STA_INFO_RX_BITRATE))
2680                         goto nla_put_failure;
2681         }
2682         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2683             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2684                         sinfo->rx_packets))
2685                 goto nla_put_failure;
2686         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2687             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2688                         sinfo->tx_packets))
2689                 goto nla_put_failure;
2690         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2691             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2692                         sinfo->tx_retries))
2693                 goto nla_put_failure;
2694         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2695             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2696                         sinfo->tx_failed))
2697                 goto nla_put_failure;
2698         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2699             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2700                         sinfo->beacon_loss_count))
2701                 goto nla_put_failure;
2702         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2703                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2704                 if (!bss_param)
2705                         goto nla_put_failure;
2706
2707                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2708                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2709                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2710                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2711                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2712                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2713                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2714                                sinfo->bss_param.dtim_period) ||
2715                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2716                                 sinfo->bss_param.beacon_interval))
2717                         goto nla_put_failure;
2718
2719                 nla_nest_end(msg, bss_param);
2720         }
2721         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2722             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2723                     sizeof(struct nl80211_sta_flag_update),
2724                     &sinfo->sta_flags))
2725                 goto nla_put_failure;
2726         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2727                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2728                             sinfo->t_offset))
2729                 goto nla_put_failure;
2730         nla_nest_end(msg, sinfoattr);
2731
2732         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2733             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2734                     sinfo->assoc_req_ies))
2735                 goto nla_put_failure;
2736
2737         return genlmsg_end(msg, hdr);
2738
2739  nla_put_failure:
2740         genlmsg_cancel(msg, hdr);
2741         return -EMSGSIZE;
2742 }
2743
2744 static int nl80211_dump_station(struct sk_buff *skb,
2745                                 struct netlink_callback *cb)
2746 {
2747         struct station_info sinfo;
2748         struct cfg80211_registered_device *dev;
2749         struct net_device *netdev;
2750         u8 mac_addr[ETH_ALEN];
2751         int sta_idx = cb->args[1];
2752         int err;
2753
2754         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2755         if (err)
2756                 return err;
2757
2758         if (!dev->ops->dump_station) {
2759                 err = -EOPNOTSUPP;
2760                 goto out_err;
2761         }
2762
2763         while (1) {
2764                 memset(&sinfo, 0, sizeof(sinfo));
2765                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2766                                              mac_addr, &sinfo);
2767                 if (err == -ENOENT)
2768                         break;
2769                 if (err)
2770                         goto out_err;
2771
2772                 if (nl80211_send_station(skb,
2773                                 NETLINK_CB(cb->skb).pid,
2774                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2775                                 dev, netdev, mac_addr,
2776                                 &sinfo) < 0)
2777                         goto out;
2778
2779                 sta_idx++;
2780         }
2781
2782
2783  out:
2784         cb->args[1] = sta_idx;
2785         err = skb->len;
2786  out_err:
2787         nl80211_finish_netdev_dump(dev);
2788
2789         return err;
2790 }
2791
2792 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2793 {
2794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2795         struct net_device *dev = info->user_ptr[1];
2796         struct station_info sinfo;
2797         struct sk_buff *msg;
2798         u8 *mac_addr = NULL;
2799         int err;
2800
2801         memset(&sinfo, 0, sizeof(sinfo));
2802
2803         if (!info->attrs[NL80211_ATTR_MAC])
2804                 return -EINVAL;
2805
2806         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2807
2808         if (!rdev->ops->get_station)
2809                 return -EOPNOTSUPP;
2810
2811         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2812         if (err)
2813                 return err;
2814
2815         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2816         if (!msg)
2817                 return -ENOMEM;
2818
2819         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2820                                  rdev, dev, mac_addr, &sinfo) < 0) {
2821                 nlmsg_free(msg);
2822                 return -ENOBUFS;
2823         }
2824
2825         return genlmsg_reply(msg, info);
2826 }
2827
2828 /*
2829  * Get vlan interface making sure it is running and on the right wiphy.
2830  */
2831 static struct net_device *get_vlan(struct genl_info *info,
2832                                    struct cfg80211_registered_device *rdev)
2833 {
2834         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2835         struct net_device *v;
2836         int ret;
2837
2838         if (!vlanattr)
2839                 return NULL;
2840
2841         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2842         if (!v)
2843                 return ERR_PTR(-ENODEV);
2844
2845         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2846                 ret = -EINVAL;
2847                 goto error;
2848         }
2849
2850         if (!netif_running(v)) {
2851                 ret = -ENETDOWN;
2852                 goto error;
2853         }
2854
2855         return v;
2856  error:
2857         dev_put(v);
2858         return ERR_PTR(ret);
2859 }
2860
2861 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2862 {
2863         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2864         int err;
2865         struct net_device *dev = info->user_ptr[1];
2866         struct station_parameters params;
2867         u8 *mac_addr = NULL;
2868
2869         memset(&params, 0, sizeof(params));
2870
2871         params.listen_interval = -1;
2872         params.plink_state = -1;
2873
2874         if (info->attrs[NL80211_ATTR_STA_AID])
2875                 return -EINVAL;
2876
2877         if (!info->attrs[NL80211_ATTR_MAC])
2878                 return -EINVAL;
2879
2880         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2881
2882         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2883                 params.supported_rates =
2884                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2885                 params.supported_rates_len =
2886                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2887         }
2888
2889         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2890                 params.listen_interval =
2891                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2892
2893         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2894                 params.ht_capa =
2895                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2896
2897         if (!rdev->ops->change_station)
2898                 return -EOPNOTSUPP;
2899
2900         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2901                 return -EINVAL;
2902
2903         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2904                 params.plink_action =
2905                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2906
2907         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2908                 params.plink_state =
2909                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2910
2911         switch (dev->ieee80211_ptr->iftype) {
2912         case NL80211_IFTYPE_AP:
2913         case NL80211_IFTYPE_AP_VLAN:
2914         case NL80211_IFTYPE_P2P_GO:
2915                 /* disallow mesh-specific things */
2916                 if (params.plink_action)
2917                         return -EINVAL;
2918
2919                 /* TDLS can't be set, ... */
2920                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2921                         return -EINVAL;
2922                 /*
2923                  * ... but don't bother the driver with it. This works around
2924                  * a hostapd/wpa_supplicant issue -- it always includes the
2925                  * TLDS_PEER flag in the mask even for AP mode.
2926                  */
2927                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2928
2929                 /* accept only the listed bits */
2930                 if (params.sta_flags_mask &
2931                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2932                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2933                                   BIT(NL80211_STA_FLAG_WME) |
2934                                   BIT(NL80211_STA_FLAG_MFP)))
2935                         return -EINVAL;
2936
2937                 /* must be last in here for error handling */
2938                 params.vlan = get_vlan(info, rdev);
2939                 if (IS_ERR(params.vlan))
2940                         return PTR_ERR(params.vlan);
2941                 break;
2942         case NL80211_IFTYPE_P2P_CLIENT:
2943         case NL80211_IFTYPE_STATION:
2944                 /*
2945                  * Don't allow userspace to change the TDLS_PEER flag,
2946                  * but silently ignore attempts to change it since we
2947                  * don't have state here to verify that it doesn't try
2948                  * to change the flag.
2949                  */
2950                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2951                 /* fall through */
2952         case NL80211_IFTYPE_ADHOC:
2953                 /* disallow things sta doesn't support */
2954                 if (params.plink_action)
2955                         return -EINVAL;
2956                 if (params.ht_capa)
2957                         return -EINVAL;
2958                 if (params.listen_interval >= 0)
2959                         return -EINVAL;
2960                 /* reject any changes other than AUTHORIZED */
2961                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2962                         return -EINVAL;
2963                 break;
2964         case NL80211_IFTYPE_MESH_POINT:
2965                 /* disallow things mesh doesn't support */
2966                 if (params.vlan)
2967                         return -EINVAL;
2968                 if (params.ht_capa)
2969                         return -EINVAL;
2970                 if (params.listen_interval >= 0)
2971                         return -EINVAL;
2972                 /*
2973                  * No special handling for TDLS here -- the userspace
2974                  * mesh code doesn't have this bug.
2975                  */
2976                 if (params.sta_flags_mask &
2977                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2978                                   BIT(NL80211_STA_FLAG_MFP) |
2979                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2980                         return -EINVAL;
2981                 break;
2982         default:
2983                 return -EOPNOTSUPP;
2984         }
2985
2986         /* be aware of params.vlan when changing code here */
2987
2988         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2989
2990         if (params.vlan)
2991                 dev_put(params.vlan);
2992
2993         return err;
2994 }
2995
2996 static struct nla_policy
2997 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2998         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2999         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3000 };
3001
3002 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3003 {
3004         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3005         int err;
3006         struct net_device *dev = info->user_ptr[1];
3007         struct station_parameters params;
3008         u8 *mac_addr = NULL;
3009
3010         memset(&params, 0, sizeof(params));
3011
3012         if (!info->attrs[NL80211_ATTR_MAC])
3013                 return -EINVAL;
3014
3015         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3016                 return -EINVAL;
3017
3018         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3019                 return -EINVAL;
3020
3021         if (!info->attrs[NL80211_ATTR_STA_AID])
3022                 return -EINVAL;
3023
3024         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3025         params.supported_rates =
3026                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3027         params.supported_rates_len =
3028                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3029         params.listen_interval =
3030                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3031
3032         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3033         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3034                 return -EINVAL;
3035
3036         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3037                 params.ht_capa =
3038                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3039
3040         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3041                 params.plink_action =
3042                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3043
3044         if (!rdev->ops->add_station)
3045                 return -EOPNOTSUPP;
3046
3047         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3048                 return -EINVAL;
3049
3050         switch (dev->ieee80211_ptr->iftype) {
3051         case NL80211_IFTYPE_AP:
3052         case NL80211_IFTYPE_AP_VLAN:
3053         case NL80211_IFTYPE_P2P_GO:
3054                 /* parse WME attributes if sta is WME capable */
3055                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3056                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3057                     info->attrs[NL80211_ATTR_STA_WME]) {
3058                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3059                         struct nlattr *nla;
3060
3061                         nla = info->attrs[NL80211_ATTR_STA_WME];
3062                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3063                                                nl80211_sta_wme_policy);
3064                         if (err)
3065                                 return err;
3066
3067                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3068                                 params.uapsd_queues =
3069                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3070                         if (params.uapsd_queues &
3071                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3072                                 return -EINVAL;
3073
3074                         if (tb[NL80211_STA_WME_MAX_SP])
3075                                 params.max_sp =
3076                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3077
3078                         if (params.max_sp &
3079                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3080                                 return -EINVAL;
3081
3082                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3083                 }
3084                 /* TDLS peers cannot be added */
3085                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3086                         return -EINVAL;
3087                 /* but don't bother the driver with it */
3088                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3089
3090                 /* must be last in here for error handling */
3091                 params.vlan = get_vlan(info, rdev);
3092                 if (IS_ERR(params.vlan))
3093                         return PTR_ERR(params.vlan);
3094                 break;
3095         case NL80211_IFTYPE_MESH_POINT:
3096                 /* TDLS peers cannot be added */
3097                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3098                         return -EINVAL;
3099                 break;
3100         case NL80211_IFTYPE_STATION:
3101                 /* Only TDLS peers can be added */
3102                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3103                         return -EINVAL;
3104                 /* Can only add if TDLS ... */
3105                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3106                         return -EOPNOTSUPP;
3107                 /* ... with external setup is supported */
3108                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3109                         return -EOPNOTSUPP;
3110                 break;
3111         default:
3112                 return -EOPNOTSUPP;
3113         }
3114
3115         /* be aware of params.vlan when changing code here */
3116
3117         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3118
3119         if (params.vlan)
3120                 dev_put(params.vlan);
3121         return err;
3122 }
3123
3124 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3125 {
3126         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3127         struct net_device *dev = info->user_ptr[1];
3128         u8 *mac_addr = NULL;
3129
3130         if (info->attrs[NL80211_ATTR_MAC])
3131                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3132
3133         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3134             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3135             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3136             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3137                 return -EINVAL;
3138
3139         if (!rdev->ops->del_station)
3140                 return -EOPNOTSUPP;
3141
3142         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3143 }
3144
3145 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3146                                 int flags, struct net_device *dev,
3147                                 u8 *dst, u8 *next_hop,
3148                                 struct mpath_info *pinfo)
3149 {
3150         void *hdr;
3151         struct nlattr *pinfoattr;
3152
3153         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3154         if (!hdr)
3155                 return -1;
3156
3157         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3158             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3159             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3160             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3161                 goto nla_put_failure;
3162
3163         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3164         if (!pinfoattr)
3165                 goto nla_put_failure;
3166         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3167             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3168                         pinfo->frame_qlen))
3169                 goto nla_put_failure;
3170         if (((pinfo->filled & MPATH_INFO_SN) &&
3171              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3172             ((pinfo->filled & MPATH_INFO_METRIC) &&
3173              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3174                          pinfo->metric)) ||
3175             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3176              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3177                          pinfo->exptime)) ||
3178             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3179              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3180                         pinfo->flags)) ||
3181             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3182              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3183                          pinfo->discovery_timeout)) ||
3184             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3185              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3186                         pinfo->discovery_retries)))
3187                 goto nla_put_failure;
3188
3189         nla_nest_end(msg, pinfoattr);
3190
3191         return genlmsg_end(msg, hdr);
3192
3193  nla_put_failure:
3194         genlmsg_cancel(msg, hdr);
3195         return -EMSGSIZE;
3196 }
3197
3198 static int nl80211_dump_mpath(struct sk_buff *skb,
3199                               struct netlink_callback *cb)
3200 {
3201         struct mpath_info pinfo;
3202         struct cfg80211_registered_device *dev;
3203         struct net_device *netdev;
3204         u8 dst[ETH_ALEN];
3205         u8 next_hop[ETH_ALEN];
3206         int path_idx = cb->args[1];
3207         int err;
3208
3209         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3210         if (err)
3211                 return err;
3212
3213         if (!dev->ops->dump_mpath) {
3214                 err = -EOPNOTSUPP;
3215                 goto out_err;
3216         }
3217
3218         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3219                 err = -EOPNOTSUPP;
3220                 goto out_err;
3221         }
3222
3223         while (1) {
3224                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3225                                            dst, next_hop, &pinfo);
3226                 if (err == -ENOENT)
3227                         break;
3228                 if (err)
3229                         goto out_err;
3230
3231                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3232                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3233                                        netdev, dst, next_hop,
3234                                        &pinfo) < 0)
3235                         goto out;
3236
3237                 path_idx++;
3238         }
3239
3240
3241  out:
3242         cb->args[1] = path_idx;
3243         err = skb->len;
3244  out_err:
3245         nl80211_finish_netdev_dump(dev);
3246         return err;
3247 }
3248
3249 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3250 {
3251         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3252         int err;
3253         struct net_device *dev = info->user_ptr[1];
3254         struct mpath_info pinfo;
3255         struct sk_buff *msg;
3256         u8 *dst = NULL;
3257         u8 next_hop[ETH_ALEN];
3258
3259         memset(&pinfo, 0, sizeof(pinfo));
3260
3261         if (!info->attrs[NL80211_ATTR_MAC])
3262                 return -EINVAL;
3263
3264         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3265
3266         if (!rdev->ops->get_mpath)
3267                 return -EOPNOTSUPP;
3268
3269         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3270                 return -EOPNOTSUPP;
3271
3272         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3273         if (err)
3274                 return err;
3275
3276         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3277         if (!msg)
3278                 return -ENOMEM;
3279
3280         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3281                                  dev, dst, next_hop, &pinfo) < 0) {
3282                 nlmsg_free(msg);
3283                 return -ENOBUFS;
3284         }
3285
3286         return genlmsg_reply(msg, info);
3287 }
3288
3289 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3290 {
3291         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3292         struct net_device *dev = info->user_ptr[1];
3293         u8 *dst = NULL;
3294         u8 *next_hop = NULL;
3295
3296         if (!info->attrs[NL80211_ATTR_MAC])
3297                 return -EINVAL;
3298
3299         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3300                 return -EINVAL;
3301
3302         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3303         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3304
3305         if (!rdev->ops->change_mpath)
3306                 return -EOPNOTSUPP;
3307
3308         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3309                 return -EOPNOTSUPP;
3310
3311         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3312 }
3313
3314 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3315 {
3316         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3317         struct net_device *dev = info->user_ptr[1];
3318         u8 *dst = NULL;
3319         u8 *next_hop = NULL;
3320
3321         if (!info->attrs[NL80211_ATTR_MAC])
3322                 return -EINVAL;
3323
3324         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3325                 return -EINVAL;
3326
3327         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3328         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3329
3330         if (!rdev->ops->add_mpath)
3331                 return -EOPNOTSUPP;
3332
3333         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3334                 return -EOPNOTSUPP;
3335
3336         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3337 }
3338
3339 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3340 {
3341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3342         struct net_device *dev = info->user_ptr[1];
3343         u8 *dst = NULL;
3344
3345         if (info->attrs[NL80211_ATTR_MAC])
3346                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3347
3348         if (!rdev->ops->del_mpath)
3349                 return -EOPNOTSUPP;
3350
3351         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3352 }
3353
3354 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3355 {
3356         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3357         struct net_device *dev = info->user_ptr[1];
3358         struct bss_parameters params;
3359
3360         memset(&params, 0, sizeof(params));
3361         /* default to not changing parameters */
3362         params.use_cts_prot = -1;
3363         params.use_short_preamble = -1;
3364         params.use_short_slot_time = -1;
3365         params.ap_isolate = -1;
3366         params.ht_opmode = -1;
3367
3368         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3369                 params.use_cts_prot =
3370                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3371         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3372                 params.use_short_preamble =
3373                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3374         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3375                 params.use_short_slot_time =
3376                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3377         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3378                 params.basic_rates =
3379                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3380                 params.basic_rates_len =
3381                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3382         }
3383         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3384                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3385         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3386                 params.ht_opmode =
3387                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3388
3389         if (!rdev->ops->change_bss)
3390                 return -EOPNOTSUPP;
3391
3392         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3393             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3394                 return -EOPNOTSUPP;
3395
3396         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3397 }
3398
3399 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3400         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3401         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3402         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3403         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3404         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3405         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3406 };
3407
3408 static int parse_reg_rule(struct nlattr *tb[],
3409         struct ieee80211_reg_rule *reg_rule)
3410 {
3411         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3412         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3413
3414         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3415                 return -EINVAL;
3416         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3417                 return -EINVAL;
3418         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3419                 return -EINVAL;
3420         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3421                 return -EINVAL;
3422         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3423                 return -EINVAL;
3424
3425         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3426
3427         freq_range->start_freq_khz =
3428                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3429         freq_range->end_freq_khz =
3430                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3431         freq_range->max_bandwidth_khz =
3432                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3433
3434         power_rule->max_eirp =
3435                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3436
3437         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3438                 power_rule->max_antenna_gain =
3439                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3440
3441         return 0;
3442 }
3443
3444 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3445 {
3446         int r;
3447         char *data = NULL;
3448
3449         /*
3450          * You should only get this when cfg80211 hasn't yet initialized
3451          * completely when built-in to the kernel right between the time
3452          * window between nl80211_init() and regulatory_init(), if that is
3453          * even possible.
3454          */
3455         mutex_lock(&cfg80211_mutex);
3456         if (unlikely(!cfg80211_regdomain)) {
3457                 mutex_unlock(&cfg80211_mutex);
3458                 return -EINPROGRESS;
3459         }
3460         mutex_unlock(&cfg80211_mutex);
3461
3462         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3463                 return -EINVAL;
3464
3465         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3466
3467         r = regulatory_hint_user(data);
3468
3469         return r;
3470 }
3471
3472 static int nl80211_get_mesh_config(struct sk_buff *skb,
3473                                    struct genl_info *info)
3474 {
3475         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3476         struct net_device *dev = info->user_ptr[1];
3477         struct wireless_dev *wdev = dev->ieee80211_ptr;
3478         struct mesh_config cur_params;
3479         int err = 0;
3480         void *hdr;
3481         struct nlattr *pinfoattr;
3482         struct sk_buff *msg;
3483
3484         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3485                 return -EOPNOTSUPP;
3486
3487         if (!rdev->ops->get_mesh_config)
3488                 return -EOPNOTSUPP;
3489
3490         wdev_lock(wdev);
3491         /* If not connected, get default parameters */
3492         if (!wdev->mesh_id_len)
3493                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3494         else
3495                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3496                                                  &cur_params);
3497         wdev_unlock(wdev);
3498
3499         if (err)
3500                 return err;
3501
3502         /* Draw up a netlink message to send back */
3503         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3504         if (!msg)
3505                 return -ENOMEM;
3506         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3507                              NL80211_CMD_GET_MESH_CONFIG);
3508         if (!hdr)
3509                 goto out;
3510         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3511         if (!pinfoattr)
3512                 goto nla_put_failure;
3513         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3514             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3515                         cur_params.dot11MeshRetryTimeout) ||
3516             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3517                         cur_params.dot11MeshConfirmTimeout) ||
3518             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3519                         cur_params.dot11MeshHoldingTimeout) ||
3520             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3521                         cur_params.dot11MeshMaxPeerLinks) ||
3522             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3523                        cur_params.dot11MeshMaxRetries) ||
3524             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3525                        cur_params.dot11MeshTTL) ||
3526             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3527                        cur_params.element_ttl) ||
3528             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3529                        cur_params.auto_open_plinks) ||
3530             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3531                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3532             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3533                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3534             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3535                         cur_params.path_refresh_time) ||
3536             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3537                         cur_params.min_discovery_timeout) ||
3538             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3539                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3540             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3541                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3542             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3543                         cur_params.dot11MeshHWMPperrMinInterval) ||
3544             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3545                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3546             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3547                        cur_params.dot11MeshHWMPRootMode) ||
3548             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3549                         cur_params.dot11MeshHWMPRannInterval) ||
3550             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3551                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3552             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3553                        cur_params.dot11MeshForwarding) ||
3554             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3555                         cur_params.rssi_threshold) ||
3556             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3557                         cur_params.ht_opmode) ||
3558             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3559                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3560             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3561                         cur_params.dot11MeshHWMProotInterval) ||
3562             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3563                         cur_params.dot11MeshHWMPconfirmationInterval))
3564                 goto nla_put_failure;
3565         nla_nest_end(msg, pinfoattr);
3566         genlmsg_end(msg, hdr);
3567         return genlmsg_reply(msg, info);
3568
3569  nla_put_failure:
3570         genlmsg_cancel(msg, hdr);
3571  out:
3572         nlmsg_free(msg);
3573         return -ENOBUFS;
3574 }
3575
3576 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3577         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3578         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3579         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3580         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3581         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3582         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3583         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3584         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3585         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3586         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3587         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3588         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3589         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3590         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3591         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3592         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3593         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3594         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3595         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3596         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3597         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3598         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3599         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3600         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3601         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3602 };
3603
3604 static const struct nla_policy
3605         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3606         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3607         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3608         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3609         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3610         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3611                                     .len = IEEE80211_MAX_DATA_LEN },
3612         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3613 };
3614
3615 static int nl80211_parse_mesh_config(struct genl_info *info,
3616                                      struct mesh_config *cfg,
3617                                      u32 *mask_out)
3618 {
3619         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3620         u32 mask = 0;
3621
3622 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3623 do {\
3624         if (table[attr_num]) {\
3625                 cfg->param = nla_fn(table[attr_num]); \
3626                 mask |= (1 << (attr_num - 1)); \
3627         } \
3628 } while (0);\
3629
3630
3631         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3632                 return -EINVAL;
3633         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3634                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3635                              nl80211_meshconf_params_policy))
3636                 return -EINVAL;
3637
3638         /* This makes sure that there aren't more than 32 mesh config
3639          * parameters (otherwise our bitfield scheme would not work.) */
3640         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3641
3642         /* Fill in the params struct */
3643         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3644                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3645                                   nla_get_u16);
3646         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3647                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3648                                   nla_get_u16);
3649         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3650                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3651                                   nla_get_u16);
3652         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3653                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3654                                   nla_get_u16);
3655         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3656                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3657                                   nla_get_u8);
3658         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3659                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3660         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3661                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3662                                   nla_get_u8);
3663         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3664                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3665                                   nla_get_u8);
3666         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3667                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3668                                   nla_get_u32);
3669         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3670                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3671                                   nla_get_u8);
3672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3673                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3674                                   nla_get_u32);
3675         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3676                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3677                                   nla_get_u16);
3678         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3679                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3680                                   nla_get_u32);
3681         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3682                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3683                                   nla_get_u16);
3684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3685                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3686                                   nla_get_u16);
3687         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3688                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3689                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3690                                   nla_get_u16);
3691         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3692                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3693         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3694                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3695                                   nla_get_u16);
3696         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3697                                   dot11MeshGateAnnouncementProtocol, mask,
3698                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3699                                   nla_get_u8);
3700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3701                                   mask, NL80211_MESHCONF_FORWARDING,
3702                                   nla_get_u8);
3703         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3704                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3705                                   nla_get_u32);
3706         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3707                                   mask, NL80211_MESHCONF_HT_OPMODE,
3708                                   nla_get_u16);
3709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3710                                   mask,
3711                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3712                                   nla_get_u32);
3713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3714                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3715                                   nla_get_u16);
3716         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3717                                   dot11MeshHWMPconfirmationInterval, mask,
3718                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3719                                   nla_get_u16);
3720         if (mask_out)
3721                 *mask_out = mask;
3722
3723         return 0;
3724
3725 #undef FILL_IN_MESH_PARAM_IF_SET
3726 }
3727
3728 static int nl80211_parse_mesh_setup(struct genl_info *info,
3729                                      struct mesh_setup *setup)
3730 {
3731         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3732
3733         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3734                 return -EINVAL;
3735         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3736                              info->attrs[NL80211_ATTR_MESH_SETUP],
3737                              nl80211_mesh_setup_params_policy))
3738                 return -EINVAL;
3739
3740         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3741                 setup->sync_method =
3742                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3743                  IEEE80211_SYNC_METHOD_VENDOR :
3744                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3745
3746         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3747                 setup->path_sel_proto =
3748                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3749                  IEEE80211_PATH_PROTOCOL_VENDOR :
3750                  IEEE80211_PATH_PROTOCOL_HWMP;
3751
3752         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3753                 setup->path_metric =
3754                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3755                  IEEE80211_PATH_METRIC_VENDOR :
3756                  IEEE80211_PATH_METRIC_AIRTIME;
3757
3758
3759         if (tb[NL80211_MESH_SETUP_IE]) {
3760                 struct nlattr *ieattr =
3761                         tb[NL80211_MESH_SETUP_IE];
3762                 if (!is_valid_ie_attr(ieattr))
3763                         return -EINVAL;
3764                 setup->ie = nla_data(ieattr);
3765                 setup->ie_len = nla_len(ieattr);
3766         }
3767         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3768         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3769
3770         return 0;
3771 }
3772
3773 static int nl80211_update_mesh_config(struct sk_buff *skb,
3774                                       struct genl_info *info)
3775 {
3776         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3777         struct net_device *dev = info->user_ptr[1];
3778         struct wireless_dev *wdev = dev->ieee80211_ptr;
3779         struct mesh_config cfg;
3780         u32 mask;
3781         int err;
3782
3783         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3784                 return -EOPNOTSUPP;
3785
3786         if (!rdev->ops->update_mesh_config)
3787                 return -EOPNOTSUPP;
3788
3789         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3790         if (err)
3791                 return err;
3792
3793         wdev_lock(wdev);
3794         if (!wdev->mesh_id_len)
3795                 err = -ENOLINK;
3796
3797         if (!err)
3798                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3799                                                     mask, &cfg);
3800
3801         wdev_unlock(wdev);
3802
3803         return err;
3804 }
3805
3806 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3807 {
3808         struct sk_buff *msg;
3809         void *hdr = NULL;
3810         struct nlattr *nl_reg_rules;
3811         unsigned int i;
3812         int err = -EINVAL;
3813
3814         mutex_lock(&cfg80211_mutex);
3815
3816         if (!cfg80211_regdomain)
3817                 goto out;
3818
3819         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3820         if (!msg) {
3821                 err = -ENOBUFS;
3822                 goto out;
3823         }
3824
3825         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3826                              NL80211_CMD_GET_REG);
3827         if (!hdr)
3828                 goto put_failure;
3829
3830         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3831                            cfg80211_regdomain->alpha2) ||
3832             (cfg80211_regdomain->dfs_region &&
3833              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3834                         cfg80211_regdomain->dfs_region)))
3835                 goto nla_put_failure;
3836
3837         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3838         if (!nl_reg_rules)
3839                 goto nla_put_failure;
3840
3841         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3842                 struct nlattr *nl_reg_rule;
3843                 const struct ieee80211_reg_rule *reg_rule;
3844                 const struct ieee80211_freq_range *freq_range;
3845                 const struct ieee80211_power_rule *power_rule;
3846
3847                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3848                 freq_range = &reg_rule->freq_range;
3849                 power_rule = &reg_rule->power_rule;
3850
3851                 nl_reg_rule = nla_nest_start(msg, i);
3852                 if (!nl_reg_rule)
3853                         goto nla_put_failure;
3854
3855                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3856                                 reg_rule->flags) ||
3857                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3858                                 freq_range->start_freq_khz) ||
3859                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3860                                 freq_range->end_freq_khz) ||
3861                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3862                                 freq_range->max_bandwidth_khz) ||
3863                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3864                                 power_rule->max_antenna_gain) ||
3865                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3866                                 power_rule->max_eirp))
3867                         goto nla_put_failure;
3868
3869                 nla_nest_end(msg, nl_reg_rule);
3870         }
3871
3872         nla_nest_end(msg, nl_reg_rules);
3873
3874         genlmsg_end(msg, hdr);
3875         err = genlmsg_reply(msg, info);
3876         goto out;
3877
3878 nla_put_failure:
3879         genlmsg_cancel(msg, hdr);
3880 put_failure:
3881         nlmsg_free(msg);
3882         err = -EMSGSIZE;
3883 out:
3884         mutex_unlock(&cfg80211_mutex);
3885         return err;
3886 }
3887
3888 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3889 {
3890         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3891         struct nlattr *nl_reg_rule;
3892         char *alpha2 = NULL;
3893         int rem_reg_rules = 0, r = 0;
3894         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3895         u8 dfs_region = 0;
3896         struct ieee80211_regdomain *rd = NULL;
3897
3898         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3899                 return -EINVAL;
3900
3901         if (!info->attrs[NL80211_ATTR_REG_RULES])
3902                 return -EINVAL;
3903
3904         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3905
3906         if (info->attrs[NL80211_ATTR_DFS_REGION])
3907                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3908
3909         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3910                         rem_reg_rules) {
3911                 num_rules++;
3912                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3913                         return -EINVAL;
3914         }
3915
3916         mutex_lock(&cfg80211_mutex);
3917
3918         if (!reg_is_valid_request(alpha2)) {
3919                 r = -EINVAL;
3920                 goto bad_reg;
3921         }
3922
3923         size_of_regd = sizeof(struct ieee80211_regdomain) +
3924                 (num_rules * sizeof(struct ieee80211_reg_rule));
3925
3926         rd = kzalloc(size_of_regd, GFP_KERNEL);
3927         if (!rd) {
3928                 r = -ENOMEM;
3929                 goto bad_reg;
3930         }
3931
3932         rd->n_reg_rules = num_rules;
3933         rd->alpha2[0] = alpha2[0];
3934         rd->alpha2[1] = alpha2[1];
3935
3936         /*
3937          * Disable DFS master mode if the DFS region was
3938          * not supported or known on this kernel.
3939          */
3940         if (reg_supported_dfs_region(dfs_region))
3941                 rd->dfs_region = dfs_region;
3942
3943         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3944                         rem_reg_rules) {
3945                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3946                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3947                         reg_rule_policy);
3948                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3949                 if (r)
3950                         goto bad_reg;
3951
3952                 rule_idx++;
3953
3954                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3955                         r = -EINVAL;
3956                         goto bad_reg;
3957                 }
3958         }
3959
3960         BUG_ON(rule_idx != num_rules);
3961
3962         r = set_regdom(rd);
3963
3964         mutex_unlock(&cfg80211_mutex);
3965
3966         return r;
3967
3968  bad_reg:
3969         mutex_unlock(&cfg80211_mutex);
3970         kfree(rd);
3971         return r;
3972 }
3973
3974 static int validate_scan_freqs(struct nlattr *freqs)
3975 {
3976         struct nlattr *attr1, *attr2;
3977         int n_channels = 0, tmp1, tmp2;
3978
3979         nla_for_each_nested(attr1, freqs, tmp1) {
3980                 n_channels++;
3981                 /*
3982                  * Some hardware has a limited channel list for
3983                  * scanning, and it is pretty much nonsensical
3984                  * to scan for a channel twice, so disallow that
3985                  * and don't require drivers to check that the
3986                  * channel list they get isn't longer than what
3987                  * they can scan, as long as they can scan all
3988                  * the channels they registered at once.
3989                  */
3990                 nla_for_each_nested(attr2, freqs, tmp2)
3991                         if (attr1 != attr2 &&
3992                             nla_get_u32(attr1) == nla_get_u32(attr2))
3993                                 return 0;
3994         }
3995
3996         return n_channels;
3997 }
3998
3999 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4000 {
4001         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4002         struct net_device *dev = info->user_ptr[1];
4003         struct cfg80211_scan_request *request;
4004         struct nlattr *attr;
4005         struct wiphy *wiphy;
4006         int err, tmp, n_ssids = 0, n_channels, i;
4007         size_t ie_len;
4008
4009         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4010                 return -EINVAL;
4011
4012         wiphy = &rdev->wiphy;
4013
4014         if (!rdev->ops->scan)
4015                 return -EOPNOTSUPP;
4016
4017         if (rdev->scan_req)
4018                 return -EBUSY;
4019
4020         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4021                 n_channels = validate_scan_freqs(
4022                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4023                 if (!n_channels)
4024                         return -EINVAL;
4025         } else {
4026                 enum ieee80211_band band;
4027                 n_channels = 0;
4028
4029                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4030                         if (wiphy->bands[band])
4031                                 n_channels += wiphy->bands[band]->n_channels;
4032         }
4033
4034         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4035                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4036                         n_ssids++;
4037
4038         if (n_ssids > wiphy->max_scan_ssids)
4039                 return -EINVAL;
4040
4041         if (info->attrs[NL80211_ATTR_IE])
4042                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4043         else
4044                 ie_len = 0;
4045
4046         if (ie_len > wiphy->max_scan_ie_len)
4047                 return -EINVAL;
4048
4049         request = kzalloc(sizeof(*request)
4050                         + sizeof(*request->ssids) * n_ssids
4051                         + sizeof(*request->channels) * n_channels
4052                         + ie_len, GFP_KERNEL);
4053         if (!request)
4054                 return -ENOMEM;
4055
4056         if (n_ssids)
4057                 request->ssids = (void *)&request->channels[n_channels];
4058         request->n_ssids = n_ssids;
4059         if (ie_len) {
4060                 if (request->ssids)
4061                         request->ie = (void *)(request->ssids + n_ssids);
4062                 else
4063                         request->ie = (void *)(request->channels + n_channels);
4064         }
4065
4066         i = 0;
4067         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4068                 /* user specified, bail out if channel not found */
4069                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4070                         struct ieee80211_channel *chan;
4071
4072                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4073
4074                         if (!chan) {
4075                                 err = -EINVAL;
4076                                 goto out_free;
4077                         }
4078
4079                         /* ignore disabled channels */
4080                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4081                                 continue;
4082
4083                         request->channels[i] = chan;
4084                         i++;
4085                 }
4086         } else {
4087                 enum ieee80211_band band;
4088
4089                 /* all channels */
4090                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4091                         int j;
4092                         if (!wiphy->bands[band])
4093                                 continue;
4094                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4095                                 struct ieee80211_channel *chan;
4096
4097                                 chan = &wiphy->bands[band]->channels[j];
4098
4099                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4100                                         continue;
4101
4102                                 request->channels[i] = chan;
4103                                 i++;
4104                         }
4105                 }
4106         }
4107
4108         if (!i) {
4109                 err = -EINVAL;
4110                 goto out_free;
4111         }
4112
4113         request->n_channels = i;
4114
4115         i = 0;
4116         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4117                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4118                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4119                                 err = -EINVAL;
4120                                 goto out_free;
4121                         }
4122                         request->ssids[i].ssid_len = nla_len(attr);
4123                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4124                         i++;
4125                 }
4126         }
4127
4128         if (info->attrs[NL80211_ATTR_IE]) {
4129                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4130                 memcpy((void *)request->ie,
4131                        nla_data(info->attrs[NL80211_ATTR_IE]),
4132                        request->ie_len);
4133         }
4134
4135         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4136                 if (wiphy->bands[i])
4137                         request->rates[i] =
4138                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4139
4140         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4141                 nla_for_each_nested(attr,
4142                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4143                                     tmp) {
4144                         enum ieee80211_band band = nla_type(attr);
4145
4146                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4147                                 err = -EINVAL;
4148                                 goto out_free;
4149                         }
4150                         err = ieee80211_get_ratemask(wiphy->bands[band],
4151                                                      nla_data(attr),
4152                                                      nla_len(attr),
4153                                                      &request->rates[band]);
4154                         if (err)
4155                                 goto out_free;
4156                 }
4157         }
4158
4159         request->no_cck =
4160                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4161
4162         request->dev = dev;
4163         request->wiphy = &rdev->wiphy;
4164
4165         rdev->scan_req = request;
4166         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4167
4168         if (!err) {
4169                 nl80211_send_scan_start(rdev, dev);
4170                 dev_hold(dev);
4171         } else {
4172  out_free:
4173                 rdev->scan_req = NULL;
4174                 kfree(request);
4175         }
4176
4177         return err;
4178 }
4179
4180 static int nl80211_start_sched_scan(struct sk_buff *skb,
4181                                     struct genl_info *info)
4182 {
4183         struct cfg80211_sched_scan_request *request;
4184         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4185         struct net_device *dev = info->user_ptr[1];
4186         struct nlattr *attr;
4187         struct wiphy *wiphy;
4188         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4189         u32 interval;
4190         enum ieee80211_band band;
4191         size_t ie_len;
4192         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4193
4194         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4195             !rdev->ops->sched_scan_start)
4196                 return -EOPNOTSUPP;
4197
4198         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4199                 return -EINVAL;
4200
4201         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4202                 return -EINVAL;
4203
4204         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4205         if (interval == 0)
4206                 return -EINVAL;
4207
4208         wiphy = &rdev->wiphy;
4209
4210         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4211                 n_channels = validate_scan_freqs(
4212                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4213                 if (!n_channels)
4214                         return -EINVAL;
4215         } else {
4216                 n_channels = 0;
4217
4218                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4219                         if (wiphy->bands[band])
4220                                 n_channels += wiphy->bands[band]->n_channels;
4221         }
4222
4223         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4224                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4225                                     tmp)
4226                         n_ssids++;
4227
4228         if (n_ssids > wiphy->max_sched_scan_ssids)
4229                 return -EINVAL;
4230
4231         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4232                 nla_for_each_nested(attr,
4233                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4234                                     tmp)
4235                         n_match_sets++;
4236
4237         if (n_match_sets > wiphy->max_match_sets)
4238                 return -EINVAL;
4239
4240         if (info->attrs[NL80211_ATTR_IE])
4241                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4242         else
4243                 ie_len = 0;
4244
4245         if (ie_len > wiphy->max_sched_scan_ie_len)
4246                 return -EINVAL;
4247
4248         mutex_lock(&rdev->sched_scan_mtx);
4249
4250         if (rdev->sched_scan_req) {
4251                 err = -EINPROGRESS;
4252                 goto out;
4253         }
4254
4255         request = kzalloc(sizeof(*request)
4256                         + sizeof(*request->ssids) * n_ssids
4257                         + sizeof(*request->match_sets) * n_match_sets
4258                         + sizeof(*request->channels) * n_channels
4259                         + ie_len, GFP_KERNEL);
4260         if (!request) {
4261                 err = -ENOMEM;
4262                 goto out;
4263         }
4264
4265         if (n_ssids)
4266                 request->ssids = (void *)&request->channels[n_channels];
4267         request->n_ssids = n_ssids;
4268         if (ie_len) {
4269                 if (request->ssids)
4270                         request->ie = (void *)(request->ssids + n_ssids);
4271                 else
4272                         request->ie = (void *)(request->channels + n_channels);
4273         }
4274
4275         if (n_match_sets) {
4276                 if (request->ie)
4277                         request->match_sets = (void *)(request->ie + ie_len);
4278                 else if (request->ssids)
4279                         request->match_sets =
4280                                 (void *)(request->ssids + n_ssids);
4281                 else
4282                         request->match_sets =
4283                                 (void *)(request->channels + n_channels);
4284         }
4285         request->n_match_sets = n_match_sets;
4286
4287         i = 0;
4288         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4289                 /* user specified, bail out if channel not found */
4290                 nla_for_each_nested(attr,
4291                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4292                                     tmp) {
4293                         struct ieee80211_channel *chan;
4294
4295                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4296
4297                         if (!chan) {
4298                                 err = -EINVAL;
4299                                 goto out_free;
4300                         }
4301
4302                         /* ignore disabled channels */
4303                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4304                                 continue;
4305
4306                         request->channels[i] = chan;
4307                         i++;
4308                 }
4309         } else {
4310                 /* all channels */
4311                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4312                         int j;
4313                         if (!wiphy->bands[band])
4314                                 continue;
4315                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4316                                 struct ieee80211_channel *chan;
4317
4318                                 chan = &wiphy->bands[band]->channels[j];
4319
4320                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4321                                         continue;
4322
4323                                 request->channels[i] = chan;
4324                                 i++;
4325                         }
4326                 }
4327         }
4328
4329         if (!i) {
4330                 err = -EINVAL;
4331                 goto out_free;
4332         }
4333
4334         request->n_channels = i;
4335
4336         i = 0;
4337         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4338                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4339                                     tmp) {
4340                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4341                                 err = -EINVAL;
4342                                 goto out_free;
4343                         }
4344                         request->ssids[i].ssid_len = nla_len(attr);
4345                         memcpy(request->ssids[i].ssid, nla_data(attr),
4346                                nla_len(attr));
4347                         i++;
4348                 }
4349         }
4350
4351         i = 0;
4352         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4353                 nla_for_each_nested(attr,
4354                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4355                                     tmp) {
4356                         struct nlattr *ssid;
4357
4358                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4359                                   nla_data(attr), nla_len(attr),
4360                                   nl80211_match_policy);
4361                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4362                         if (ssid) {
4363                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4364                                         err = -EINVAL;
4365                                         goto out_free;
4366                                 }
4367                                 memcpy(request->match_sets[i].ssid.ssid,
4368                                        nla_data(ssid), nla_len(ssid));
4369                                 request->match_sets[i].ssid.ssid_len =
4370                                         nla_len(ssid);
4371                         }
4372                         i++;
4373                 }
4374         }
4375
4376         if (info->attrs[NL80211_ATTR_IE]) {
4377                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4378                 memcpy((void *)request->ie,
4379                        nla_data(info->attrs[NL80211_ATTR_IE]),
4380                        request->ie_len);
4381         }
4382
4383         request->dev = dev;
4384         request->wiphy = &rdev->wiphy;
4385         request->interval = interval;
4386
4387         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4388         if (!err) {
4389                 rdev->sched_scan_req = request;
4390                 nl80211_send_sched_scan(rdev, dev,
4391                                         NL80211_CMD_START_SCHED_SCAN);
4392                 goto out;
4393         }
4394
4395 out_free:
4396         kfree(request);
4397 out:
4398         mutex_unlock(&rdev->sched_scan_mtx);
4399         return err;
4400 }
4401
4402 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4403                                    struct genl_info *info)
4404 {
4405         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4406         int err;
4407
4408         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4409             !rdev->ops->sched_scan_stop)
4410                 return -EOPNOTSUPP;
4411
4412         mutex_lock(&rdev->sched_scan_mtx);
4413         err = __cfg80211_stop_sched_scan(rdev, false);
4414         mutex_unlock(&rdev->sched_scan_mtx);
4415
4416         return err;
4417 }
4418
4419 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4420                             u32 seq, int flags,
4421                             struct cfg80211_registered_device *rdev,
4422                             struct wireless_dev *wdev,
4423                             struct cfg80211_internal_bss *intbss)
4424 {
4425         struct cfg80211_bss *res = &intbss->pub;
4426         void *hdr;
4427         struct nlattr *bss;
4428
4429         ASSERT_WDEV_LOCK(wdev);
4430
4431         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4432                              NL80211_CMD_NEW_SCAN_RESULTS);
4433         if (!hdr)
4434                 return -1;
4435
4436         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4437
4438         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4439             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4440                 goto nla_put_failure;
4441
4442         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4443         if (!bss)
4444                 goto nla_put_failure;
4445         if ((!is_zero_ether_addr(res->bssid) &&
4446              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4447             (res->information_elements && res->len_information_elements &&
4448              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4449                      res->len_information_elements,
4450                      res->information_elements)) ||
4451             (res->beacon_ies && res->len_beacon_ies &&
4452              res->beacon_ies != res->information_elements &&
4453              nla_put(msg, NL80211_BSS_BEACON_IES,
4454                      res->len_beacon_ies, res->beacon_ies)))
4455                 goto nla_put_failure;
4456         if (res->tsf &&
4457             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4458                 goto nla_put_failure;
4459         if (res->beacon_interval &&
4460             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4461                 goto nla_put_failure;
4462         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4463             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4464             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4465                         jiffies_to_msecs(jiffies - intbss->ts)))
4466                 goto nla_put_failure;
4467
4468         switch (rdev->wiphy.signal_type) {
4469         case CFG80211_SIGNAL_TYPE_MBM:
4470                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4471                         goto nla_put_failure;
4472                 break;
4473         case CFG80211_SIGNAL_TYPE_UNSPEC:
4474                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4475                         goto nla_put_failure;
4476                 break;
4477         default:
4478                 break;
4479         }
4480
4481         switch (wdev->iftype) {
4482         case NL80211_IFTYPE_P2P_CLIENT:
4483         case NL80211_IFTYPE_STATION:
4484                 if (intbss == wdev->current_bss &&
4485                     nla_put_u32(msg, NL80211_BSS_STATUS,
4486                                 NL80211_BSS_STATUS_ASSOCIATED))
4487                         goto nla_put_failure;
4488                 break;
4489         case NL80211_IFTYPE_ADHOC:
4490                 if (intbss == wdev->current_bss &&
4491                     nla_put_u32(msg, NL80211_BSS_STATUS,
4492                                 NL80211_BSS_STATUS_IBSS_JOINED))
4493                         goto nla_put_failure;
4494                 break;
4495         default:
4496                 break;
4497         }
4498
4499         nla_nest_end(msg, bss);
4500
4501         return genlmsg_end(msg, hdr);
4502
4503  nla_put_failure:
4504         genlmsg_cancel(msg, hdr);
4505         return -EMSGSIZE;
4506 }
4507
4508 static int nl80211_dump_scan(struct sk_buff *skb,
4509                              struct netlink_callback *cb)
4510 {
4511         struct cfg80211_registered_device *rdev;
4512         struct net_device *dev;
4513         struct cfg80211_internal_bss *scan;
4514         struct wireless_dev *wdev;
4515         int start = cb->args[1], idx = 0;
4516         int err;
4517
4518         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4519         if (err)
4520                 return err;
4521
4522         wdev = dev->ieee80211_ptr;
4523
4524         wdev_lock(wdev);
4525         spin_lock_bh(&rdev->bss_lock);
4526         cfg80211_bss_expire(rdev);
4527
4528         cb->seq = rdev->bss_generation;
4529
4530         list_for_each_entry(scan, &rdev->bss_list, list) {
4531                 if (++idx <= start)
4532                         continue;
4533                 if (nl80211_send_bss(skb, cb,
4534                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4535                                 rdev, wdev, scan) < 0) {
4536                         idx--;
4537                         break;
4538                 }
4539         }
4540
4541         spin_unlock_bh(&rdev->bss_lock);
4542         wdev_unlock(wdev);
4543
4544         cb->args[1] = idx;
4545         nl80211_finish_netdev_dump(rdev);
4546
4547         return skb->len;
4548 }
4549
4550 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4551                                 int flags, struct net_device *dev,
4552                                 struct survey_info *survey)
4553 {
4554         void *hdr;
4555         struct nlattr *infoattr;
4556
4557         hdr = nl80211hdr_put(msg, pid, seq, flags,
4558                              NL80211_CMD_NEW_SURVEY_RESULTS);
4559         if (!hdr)
4560                 return -ENOMEM;
4561
4562         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4563                 goto nla_put_failure;
4564
4565         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4566         if (!infoattr)
4567                 goto nla_put_failure;
4568
4569         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4570                         survey->channel->center_freq))
4571                 goto nla_put_failure;
4572
4573         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4574             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4575                 goto nla_put_failure;
4576         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4577             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4578                 goto nla_put_failure;
4579         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4580             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4581                         survey->channel_time))
4582                 goto nla_put_failure;
4583         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4584             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4585                         survey->channel_time_busy))
4586                 goto nla_put_failure;
4587         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4588             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4589                         survey->channel_time_ext_busy))
4590                 goto nla_put_failure;
4591         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4592             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4593                         survey->channel_time_rx))
4594                 goto nla_put_failure;
4595         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4596             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4597                         survey->channel_time_tx))
4598                 goto nla_put_failure;
4599
4600         nla_nest_end(msg, infoattr);
4601
4602         return genlmsg_end(msg, hdr);
4603
4604  nla_put_failure:
4605         genlmsg_cancel(msg, hdr);
4606         return -EMSGSIZE;
4607 }
4608
4609 static int nl80211_dump_survey(struct sk_buff *skb,
4610                         struct netlink_callback *cb)
4611 {
4612         struct survey_info survey;
4613         struct cfg80211_registered_device *dev;
4614         struct net_device *netdev;
4615         int survey_idx = cb->args[1];
4616         int res;
4617
4618         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4619         if (res)
4620                 return res;
4621
4622         if (!dev->ops->dump_survey) {
4623                 res = -EOPNOTSUPP;
4624                 goto out_err;
4625         }
4626
4627         while (1) {
4628                 struct ieee80211_channel *chan;
4629
4630                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4631                                             &survey);
4632                 if (res == -ENOENT)
4633                         break;
4634                 if (res)
4635                         goto out_err;
4636
4637                 /* Survey without a channel doesn't make sense */
4638                 if (!survey.channel) {
4639                         res = -EINVAL;
4640                         goto out;
4641                 }
4642
4643                 chan = ieee80211_get_channel(&dev->wiphy,
4644                                              survey.channel->center_freq);
4645                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4646                         survey_idx++;
4647                         continue;
4648                 }
4649
4650                 if (nl80211_send_survey(skb,
4651                                 NETLINK_CB(cb->skb).pid,
4652                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4653                                 netdev,
4654                                 &survey) < 0)
4655                         goto out;
4656                 survey_idx++;
4657         }
4658
4659  out:
4660         cb->args[1] = survey_idx;
4661         res = skb->len;
4662  out_err:
4663         nl80211_finish_netdev_dump(dev);
4664         return res;
4665 }
4666
4667 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4668 {
4669         return auth_type <= NL80211_AUTHTYPE_MAX;
4670 }
4671
4672 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4673 {
4674         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4675                                   NL80211_WPA_VERSION_2));
4676 }
4677
4678 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4679 {
4680         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4681         struct net_device *dev = info->user_ptr[1];
4682         struct ieee80211_channel *chan;
4683         const u8 *bssid, *ssid, *ie = NULL;
4684         int err, ssid_len, ie_len = 0;
4685         enum nl80211_auth_type auth_type;
4686         struct key_parse key;
4687         bool local_state_change;
4688
4689         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4690                 return -EINVAL;
4691
4692         if (!info->attrs[NL80211_ATTR_MAC])
4693                 return -EINVAL;
4694
4695         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4696                 return -EINVAL;
4697
4698         if (!info->attrs[NL80211_ATTR_SSID])
4699                 return -EINVAL;
4700
4701         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4702                 return -EINVAL;
4703
4704         err = nl80211_parse_key(info, &key);
4705         if (err)
4706                 return err;
4707
4708         if (key.idx >= 0) {
4709                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4710                         return -EINVAL;
4711                 if (!key.p.key || !key.p.key_len)
4712                         return -EINVAL;
4713                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4714                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4715                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4716                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4717                         return -EINVAL;
4718                 if (key.idx > 4)
4719                         return -EINVAL;
4720         } else {
4721                 key.p.key_len = 0;
4722                 key.p.key = NULL;
4723         }
4724
4725         if (key.idx >= 0) {
4726                 int i;
4727                 bool ok = false;
4728                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4729                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4730                                 ok = true;
4731                                 break;
4732                         }
4733                 }
4734                 if (!ok)
4735                         return -EINVAL;
4736         }
4737
4738         if (!rdev->ops->auth)
4739                 return -EOPNOTSUPP;
4740
4741         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4742             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4743                 return -EOPNOTSUPP;
4744
4745         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4746         chan = ieee80211_get_channel(&rdev->wiphy,
4747                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4748         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4749                 return -EINVAL;
4750
4751         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4752         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4753
4754         if (info->attrs[NL80211_ATTR_IE]) {
4755                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4756                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4757         }
4758
4759         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4760         if (!nl80211_valid_auth_type(auth_type))
4761                 return -EINVAL;
4762
4763         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4764
4765         /*
4766          * Since we no longer track auth state, ignore
4767          * requests to only change local state.
4768          */
4769         if (local_state_change)
4770                 return 0;
4771
4772         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4773                                   ssid, ssid_len, ie, ie_len,
4774                                   key.p.key, key.p.key_len, key.idx);
4775 }
4776
4777 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4778                                    struct genl_info *info,
4779                                    struct cfg80211_crypto_settings *settings,
4780                                    int cipher_limit)
4781 {
4782         memset(settings, 0, sizeof(*settings));
4783
4784         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4785
4786         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4787                 u16 proto;
4788                 proto = nla_get_u16(
4789                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4790                 settings->control_port_ethertype = cpu_to_be16(proto);
4791                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4792                     proto != ETH_P_PAE)
4793                         return -EINVAL;
4794                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4795                         settings->control_port_no_encrypt = true;
4796         } else
4797                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4798
4799         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4800                 void *data;
4801                 int len, i;
4802
4803                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4804                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4805                 settings->n_ciphers_pairwise = len / sizeof(u32);
4806
4807                 if (len % sizeof(u32))
4808                         return -EINVAL;
4809
4810                 if (settings->n_ciphers_pairwise > cipher_limit)
4811                         return -EINVAL;
4812
4813                 memcpy(settings->ciphers_pairwise, data, len);
4814
4815                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4816                         if (!cfg80211_supported_cipher_suite(
4817                                         &rdev->wiphy,
4818                                         settings->ciphers_pairwise[i]))
4819                                 return -EINVAL;
4820         }
4821
4822         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4823                 settings->cipher_group =
4824                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4825                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4826                                                      settings->cipher_group))
4827                         return -EINVAL;
4828         }
4829
4830         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4831                 settings->wpa_versions =
4832                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4833                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4834                         return -EINVAL;
4835         }
4836
4837         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4838                 void *data;
4839                 int len;
4840
4841                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4842                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4843                 settings->n_akm_suites = len / sizeof(u32);
4844
4845                 if (len % sizeof(u32))
4846                         return -EINVAL;
4847
4848                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4849                         return -EINVAL;
4850
4851                 memcpy(settings->akm_suites, data, len);
4852         }
4853
4854         return 0;
4855 }
4856
4857 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4858 {
4859         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4860         struct net_device *dev = info->user_ptr[1];
4861         struct cfg80211_crypto_settings crypto;
4862         struct ieee80211_channel *chan;
4863         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4864         int err, ssid_len, ie_len = 0;
4865         bool use_mfp = false;
4866         u32 flags = 0;
4867         struct ieee80211_ht_cap *ht_capa = NULL;
4868         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4869
4870         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4871                 return -EINVAL;
4872
4873         if (!info->attrs[NL80211_ATTR_MAC] ||
4874             !info->attrs[NL80211_ATTR_SSID] ||
4875             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4876                 return -EINVAL;
4877
4878         if (!rdev->ops->assoc)
4879                 return -EOPNOTSUPP;
4880
4881         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4882             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4883                 return -EOPNOTSUPP;
4884
4885         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4886
4887         chan = ieee80211_get_channel(&rdev->wiphy,
4888                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4889         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4890                 return -EINVAL;
4891
4892         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4893         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4894
4895         if (info->attrs[NL80211_ATTR_IE]) {
4896                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4897                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4898         }
4899
4900         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4901                 enum nl80211_mfp mfp =
4902                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4903                 if (mfp == NL80211_MFP_REQUIRED)
4904                         use_mfp = true;
4905                 else if (mfp != NL80211_MFP_NO)
4906                         return -EINVAL;
4907         }
4908
4909         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4910                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4911
4912         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4913                 flags |= ASSOC_REQ_DISABLE_HT;
4914
4915         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4916                 ht_capa_mask =
4917                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4918
4919         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4920                 if (!ht_capa_mask)
4921                         return -EINVAL;
4922                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4923         }
4924
4925         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4926         if (!err)
4927                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4928                                           ssid, ssid_len, ie, ie_len, use_mfp,
4929                                           &crypto, flags, ht_capa,
4930                                           ht_capa_mask);
4931
4932         return err;
4933 }
4934
4935 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4936 {
4937         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4938         struct net_device *dev = info->user_ptr[1];
4939         const u8 *ie = NULL, *bssid;
4940         int ie_len = 0;
4941         u16 reason_code;
4942         bool local_state_change;
4943
4944         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4945                 return -EINVAL;
4946
4947         if (!info->attrs[NL80211_ATTR_MAC])
4948                 return -EINVAL;
4949
4950         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4951                 return -EINVAL;
4952
4953         if (!rdev->ops->deauth)
4954                 return -EOPNOTSUPP;
4955
4956         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4957             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4958                 return -EOPNOTSUPP;
4959
4960         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4961
4962         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4963         if (reason_code == 0) {
4964                 /* Reason Code 0 is reserved */
4965                 return -EINVAL;
4966         }
4967
4968         if (info->attrs[NL80211_ATTR_IE]) {
4969                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4970                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4971         }
4972
4973         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4974
4975         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4976                                     local_state_change);
4977 }
4978
4979 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4980 {
4981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4982         struct net_device *dev = info->user_ptr[1];
4983         const u8 *ie = NULL, *bssid;
4984         int ie_len = 0;
4985         u16 reason_code;
4986         bool local_state_change;
4987
4988         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4989                 return -EINVAL;
4990
4991         if (!info->attrs[NL80211_ATTR_MAC])
4992                 return -EINVAL;
4993
4994         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4995                 return -EINVAL;
4996
4997         if (!rdev->ops->disassoc)
4998                 return -EOPNOTSUPP;
4999
5000         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5001             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5002                 return -EOPNOTSUPP;
5003
5004         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5005
5006         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5007         if (reason_code == 0) {
5008                 /* Reason Code 0 is reserved */
5009                 return -EINVAL;
5010         }
5011
5012         if (info->attrs[NL80211_ATTR_IE]) {
5013                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5014                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5015         }
5016
5017         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5018
5019         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5020                                       local_state_change);
5021 }
5022
5023 static bool
5024 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5025                          int mcast_rate[IEEE80211_NUM_BANDS],
5026                          int rateval)
5027 {
5028         struct wiphy *wiphy = &rdev->wiphy;
5029         bool found = false;
5030         int band, i;
5031
5032         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5033                 struct ieee80211_supported_band *sband;
5034
5035                 sband = wiphy->bands[band];
5036                 if (!sband)
5037                         continue;
5038
5039                 for (i = 0; i < sband->n_bitrates; i++) {
5040                         if (sband->bitrates[i].bitrate == rateval) {
5041                                 mcast_rate[band] = i + 1;
5042                                 found = true;
5043                                 break;
5044                         }
5045                 }
5046         }
5047
5048         return found;
5049 }
5050
5051 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5052 {
5053         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5054         struct net_device *dev = info->user_ptr[1];
5055         struct cfg80211_ibss_params ibss;
5056         struct wiphy *wiphy;
5057         struct cfg80211_cached_keys *connkeys = NULL;
5058         int err;
5059
5060         memset(&ibss, 0, sizeof(ibss));
5061
5062         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5063                 return -EINVAL;
5064
5065         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5066             !info->attrs[NL80211_ATTR_SSID] ||
5067             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5068                 return -EINVAL;
5069
5070         ibss.beacon_interval = 100;
5071
5072         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5073                 ibss.beacon_interval =
5074                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5075                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5076                         return -EINVAL;
5077         }
5078
5079         if (!rdev->ops->join_ibss)
5080                 return -EOPNOTSUPP;
5081
5082         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5083                 return -EOPNOTSUPP;
5084
5085         wiphy = &rdev->wiphy;
5086
5087         if (info->attrs[NL80211_ATTR_MAC]) {
5088                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5089
5090                 if (!is_valid_ether_addr(ibss.bssid))
5091                         return -EINVAL;
5092         }
5093         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5094         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5095
5096         if (info->attrs[NL80211_ATTR_IE]) {
5097                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5098                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5099         }
5100
5101         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5102                 enum nl80211_channel_type channel_type;
5103
5104                 if (!nl80211_valid_channel_type(info, &channel_type))
5105                         return -EINVAL;
5106
5107                 if (channel_type != NL80211_CHAN_NO_HT &&
5108                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5109                         return -EINVAL;
5110
5111                 ibss.channel_type = channel_type;
5112         } else {
5113                 ibss.channel_type = NL80211_CHAN_NO_HT;
5114         }
5115
5116         ibss.channel = rdev_freq_to_chan(rdev,
5117                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5118                 ibss.channel_type);
5119         if (!ibss.channel ||
5120             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5121             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5122                 return -EINVAL;
5123
5124         /* Both channels should be able to initiate communication */
5125         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5126              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5127             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5128                                           ibss.channel_type))
5129                 return -EINVAL;
5130
5131         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5132         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5133
5134         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5135                 u8 *rates =
5136                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5137                 int n_rates =
5138                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5139                 struct ieee80211_supported_band *sband =
5140                         wiphy->bands[ibss.channel->band];
5141
5142                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5143                                              &ibss.basic_rates);
5144                 if (err)
5145                         return err;
5146         }
5147
5148         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5149             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5150                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5151                 return -EINVAL;
5152
5153         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5154                 connkeys = nl80211_parse_connkeys(rdev,
5155                                         info->attrs[NL80211_ATTR_KEYS]);
5156                 if (IS_ERR(connkeys))
5157                         return PTR_ERR(connkeys);
5158         }
5159
5160         ibss.control_port =
5161                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5162
5163         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5164         if (err)
5165                 kfree(connkeys);
5166         return err;
5167 }
5168
5169 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5170 {
5171         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5172         struct net_device *dev = info->user_ptr[1];
5173
5174         if (!rdev->ops->leave_ibss)
5175                 return -EOPNOTSUPP;
5176
5177         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5178                 return -EOPNOTSUPP;
5179
5180         return cfg80211_leave_ibss(rdev, dev, false);
5181 }
5182
5183 #ifdef CONFIG_NL80211_TESTMODE
5184 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5185         .name = "testmode",
5186 };
5187
5188 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5189 {
5190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5191         int err;
5192
5193         if (!info->attrs[NL80211_ATTR_TESTDATA])
5194                 return -EINVAL;
5195
5196         err = -EOPNOTSUPP;
5197         if (rdev->ops->testmode_cmd) {
5198                 rdev->testmode_info = info;
5199                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5200                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5201                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5202                 rdev->testmode_info = NULL;
5203         }
5204
5205         return err;
5206 }
5207
5208 static int nl80211_testmode_dump(struct sk_buff *skb,
5209                                  struct netlink_callback *cb)
5210 {
5211         struct cfg80211_registered_device *rdev;
5212         int err;
5213         long phy_idx;
5214         void *data = NULL;
5215         int data_len = 0;
5216
5217         if (cb->args[0]) {
5218                 /*
5219                  * 0 is a valid index, but not valid for args[0],
5220                  * so we need to offset by 1.
5221                  */
5222                 phy_idx = cb->args[0] - 1;
5223         } else {
5224                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5225                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5226                                   nl80211_policy);
5227                 if (err)
5228                         return err;
5229                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
5230                         phy_idx = nla_get_u32(
5231                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
5232                 } else {
5233                         struct net_device *netdev;
5234
5235                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
5236                                                       nl80211_fam.attrbuf,
5237                                                       &rdev, &netdev);
5238                         if (err)
5239                                 return err;
5240                         dev_put(netdev);
5241                         phy_idx = rdev->wiphy_idx;
5242                         cfg80211_unlock_rdev(rdev);
5243                 }
5244                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5245                         cb->args[1] =
5246                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5247         }
5248
5249         if (cb->args[1]) {
5250                 data = nla_data((void *)cb->args[1]);
5251                 data_len = nla_len((void *)cb->args[1]);
5252         }
5253
5254         mutex_lock(&cfg80211_mutex);
5255         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5256         if (!rdev) {
5257                 mutex_unlock(&cfg80211_mutex);
5258                 return -ENOENT;
5259         }
5260         cfg80211_lock_rdev(rdev);
5261         mutex_unlock(&cfg80211_mutex);
5262
5263         if (!rdev->ops->testmode_dump) {
5264                 err = -EOPNOTSUPP;
5265                 goto out_err;
5266         }
5267
5268         while (1) {
5269                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5270                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5271                                            NL80211_CMD_TESTMODE);
5272                 struct nlattr *tmdata;
5273
5274                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5275                         genlmsg_cancel(skb, hdr);
5276                         break;
5277                 }
5278
5279                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5280                 if (!tmdata) {
5281                         genlmsg_cancel(skb, hdr);
5282                         break;
5283                 }
5284                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5285                                                data, data_len);
5286                 nla_nest_end(skb, tmdata);
5287
5288                 if (err == -ENOBUFS || err == -ENOENT) {
5289                         genlmsg_cancel(skb, hdr);
5290                         break;
5291                 } else if (err) {
5292                         genlmsg_cancel(skb, hdr);
5293                         goto out_err;
5294                 }
5295
5296                 genlmsg_end(skb, hdr);
5297         }
5298
5299         err = skb->len;
5300         /* see above */
5301         cb->args[0] = phy_idx + 1;
5302  out_err:
5303         cfg80211_unlock_rdev(rdev);
5304         return err;
5305 }
5306
5307 static struct sk_buff *
5308 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5309                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5310 {
5311         struct sk_buff *skb;
5312         void *hdr;
5313         struct nlattr *data;
5314
5315         skb = nlmsg_new(approxlen + 100, gfp);
5316         if (!skb)
5317                 return NULL;
5318
5319         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5320         if (!hdr) {
5321                 kfree_skb(skb);
5322                 return NULL;
5323         }
5324
5325         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5326                 goto nla_put_failure;
5327         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5328
5329         ((void **)skb->cb)[0] = rdev;
5330         ((void **)skb->cb)[1] = hdr;
5331         ((void **)skb->cb)[2] = data;
5332
5333         return skb;
5334
5335  nla_put_failure:
5336         kfree_skb(skb);
5337         return NULL;
5338 }
5339
5340 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5341                                                   int approxlen)
5342 {
5343         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5344
5345         if (WARN_ON(!rdev->testmode_info))
5346                 return NULL;
5347
5348         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5349                                 rdev->testmode_info->snd_pid,
5350                                 rdev->testmode_info->snd_seq,
5351                                 GFP_KERNEL);
5352 }
5353 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5354
5355 int cfg80211_testmode_reply(struct sk_buff *skb)
5356 {
5357         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5358         void *hdr = ((void **)skb->cb)[1];
5359         struct nlattr *data = ((void **)skb->cb)[2];
5360
5361         if (WARN_ON(!rdev->testmode_info)) {
5362                 kfree_skb(skb);
5363                 return -EINVAL;
5364         }
5365
5366         nla_nest_end(skb, data);
5367         genlmsg_end(skb, hdr);
5368         return genlmsg_reply(skb, rdev->testmode_info);
5369 }
5370 EXPORT_SYMBOL(cfg80211_testmode_reply);
5371
5372 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5373                                                   int approxlen, gfp_t gfp)
5374 {
5375         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5376
5377         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5378 }
5379 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5380
5381 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5382 {
5383         void *hdr = ((void **)skb->cb)[1];
5384         struct nlattr *data = ((void **)skb->cb)[2];
5385
5386         nla_nest_end(skb, data);
5387         genlmsg_end(skb, hdr);
5388         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5389 }
5390 EXPORT_SYMBOL(cfg80211_testmode_event);
5391 #endif
5392
5393 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5394 {
5395         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5396         struct net_device *dev = info->user_ptr[1];
5397         struct cfg80211_connect_params connect;
5398         struct wiphy *wiphy;
5399         struct cfg80211_cached_keys *connkeys = NULL;
5400         int err;
5401
5402         memset(&connect, 0, sizeof(connect));
5403
5404         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5405                 return -EINVAL;
5406
5407         if (!info->attrs[NL80211_ATTR_SSID] ||
5408             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5409                 return -EINVAL;
5410
5411         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5412                 connect.auth_type =
5413                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5414                 if (!nl80211_valid_auth_type(connect.auth_type))
5415                         return -EINVAL;
5416         } else
5417                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5418
5419         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5420
5421         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5422                                       NL80211_MAX_NR_CIPHER_SUITES);
5423         if (err)
5424                 return err;
5425
5426         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5427             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5428                 return -EOPNOTSUPP;
5429
5430         wiphy = &rdev->wiphy;
5431
5432         connect.bg_scan_period = -1;
5433         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5434                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5435                 connect.bg_scan_period =
5436                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5437         }
5438
5439         if (info->attrs[NL80211_ATTR_MAC])
5440                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5441         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5442         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5443
5444         if (info->attrs[NL80211_ATTR_IE]) {
5445                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5446                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5447         }
5448
5449         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5450                 connect.channel =
5451                         ieee80211_get_channel(wiphy,
5452                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5453                 if (!connect.channel ||
5454                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5455                         return -EINVAL;
5456         }
5457
5458         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5459                 connkeys = nl80211_parse_connkeys(rdev,
5460                                         info->attrs[NL80211_ATTR_KEYS]);
5461                 if (IS_ERR(connkeys))
5462                         return PTR_ERR(connkeys);
5463         }
5464
5465         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5466                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5467
5468         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5469                 memcpy(&connect.ht_capa_mask,
5470                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5471                        sizeof(connect.ht_capa_mask));
5472
5473         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5474                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5475                         return -EINVAL;
5476                 memcpy(&connect.ht_capa,
5477                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5478                        sizeof(connect.ht_capa));
5479         }
5480
5481         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5482         if (err)
5483                 kfree(connkeys);
5484         return err;
5485 }
5486
5487 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5488 {
5489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5490         struct net_device *dev = info->user_ptr[1];
5491         u16 reason;
5492
5493         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5494                 reason = WLAN_REASON_DEAUTH_LEAVING;
5495         else
5496                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5497
5498         if (reason == 0)
5499                 return -EINVAL;
5500
5501         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5502             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5503                 return -EOPNOTSUPP;
5504
5505         return cfg80211_disconnect(rdev, dev, reason, true);
5506 }
5507
5508 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5509 {
5510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5511         struct net *net;
5512         int err;
5513         u32 pid;
5514
5515         if (!info->attrs[NL80211_ATTR_PID])
5516                 return -EINVAL;
5517
5518         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5519
5520         net = get_net_ns_by_pid(pid);
5521         if (IS_ERR(net))
5522                 return PTR_ERR(net);
5523
5524         err = 0;
5525
5526         /* check if anything to do */
5527         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5528                 err = cfg80211_switch_netns(rdev, net);
5529
5530         put_net(net);
5531         return err;
5532 }
5533
5534 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5535 {
5536         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5537         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5538                         struct cfg80211_pmksa *pmksa) = NULL;
5539         struct net_device *dev = info->user_ptr[1];
5540         struct cfg80211_pmksa pmksa;
5541
5542         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5543
5544         if (!info->attrs[NL80211_ATTR_MAC])
5545                 return -EINVAL;
5546
5547         if (!info->attrs[NL80211_ATTR_PMKID])
5548                 return -EINVAL;
5549
5550         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5551         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5552
5553         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5554             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5555                 return -EOPNOTSUPP;
5556
5557         switch (info->genlhdr->cmd) {
5558         case NL80211_CMD_SET_PMKSA:
5559                 rdev_ops = rdev->ops->set_pmksa;
5560                 break;
5561         case NL80211_CMD_DEL_PMKSA:
5562                 rdev_ops = rdev->ops->del_pmksa;
5563                 break;
5564         default:
5565                 WARN_ON(1);
5566                 break;
5567         }
5568
5569         if (!rdev_ops)
5570                 return -EOPNOTSUPP;
5571
5572         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5573 }
5574
5575 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5576 {
5577         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5578         struct net_device *dev = info->user_ptr[1];
5579
5580         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5581             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5582                 return -EOPNOTSUPP;
5583
5584         if (!rdev->ops->flush_pmksa)
5585                 return -EOPNOTSUPP;
5586
5587         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5588 }
5589
5590 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5591 {
5592         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5593         struct net_device *dev = info->user_ptr[1];
5594         u8 action_code, dialog_token;
5595         u16 status_code;
5596         u8 *peer;
5597
5598         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5599             !rdev->ops->tdls_mgmt)
5600                 return -EOPNOTSUPP;
5601
5602         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5603             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5604             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5605             !info->attrs[NL80211_ATTR_IE] ||
5606             !info->attrs[NL80211_ATTR_MAC])
5607                 return -EINVAL;
5608
5609         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5610         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5611         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5612         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5613
5614         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5615                                     dialog_token, status_code,
5616                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5617                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5618 }
5619
5620 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5621 {
5622         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5623         struct net_device *dev = info->user_ptr[1];
5624         enum nl80211_tdls_operation operation;
5625         u8 *peer;
5626
5627         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5628             !rdev->ops->tdls_oper)
5629                 return -EOPNOTSUPP;
5630
5631         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5632             !info->attrs[NL80211_ATTR_MAC])
5633                 return -EINVAL;
5634
5635         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5636         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5637
5638         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5639 }
5640
5641 static int nl80211_remain_on_channel(struct sk_buff *skb,
5642                                      struct genl_info *info)
5643 {
5644         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5645         struct net_device *dev = info->user_ptr[1];
5646         struct ieee80211_channel *chan;
5647         struct sk_buff *msg;
5648         void *hdr;
5649         u64 cookie;
5650         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5651         u32 freq, duration;
5652         int err;
5653
5654         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5655             !info->attrs[NL80211_ATTR_DURATION])
5656                 return -EINVAL;
5657
5658         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5659
5660         if (!rdev->ops->remain_on_channel ||
5661             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5662                 return -EOPNOTSUPP;
5663
5664         /*
5665          * We should be on that channel for at least a minimum amount of
5666          * time (10ms) but no longer than the driver supports.
5667          */
5668         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5669             duration > rdev->wiphy.max_remain_on_channel_duration)
5670                 return -EINVAL;
5671
5672         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5673             !nl80211_valid_channel_type(info, &channel_type))
5674                 return -EINVAL;
5675
5676         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5677         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5678         if (chan == NULL)
5679                 return -EINVAL;
5680
5681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5682         if (!msg)
5683                 return -ENOMEM;
5684
5685         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5686                              NL80211_CMD_REMAIN_ON_CHANNEL);
5687
5688         if (IS_ERR(hdr)) {
5689                 err = PTR_ERR(hdr);
5690                 goto free_msg;
5691         }
5692
5693         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5694                                            channel_type, duration, &cookie);
5695
5696         if (err)
5697                 goto free_msg;
5698
5699         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5700                 goto nla_put_failure;
5701
5702         genlmsg_end(msg, hdr);
5703
5704         return genlmsg_reply(msg, info);
5705
5706  nla_put_failure:
5707         err = -ENOBUFS;
5708  free_msg:
5709         nlmsg_free(msg);
5710         return err;
5711 }
5712
5713 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5714                                             struct genl_info *info)
5715 {
5716         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5717         struct net_device *dev = info->user_ptr[1];
5718         u64 cookie;
5719
5720         if (!info->attrs[NL80211_ATTR_COOKIE])
5721                 return -EINVAL;
5722
5723         if (!rdev->ops->cancel_remain_on_channel)
5724                 return -EOPNOTSUPP;
5725
5726         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5727
5728         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5729 }
5730
5731 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5732                            u8 *rates, u8 rates_len)
5733 {
5734         u8 i;
5735         u32 mask = 0;
5736
5737         for (i = 0; i < rates_len; i++) {
5738                 int rate = (rates[i] & 0x7f) * 5;
5739                 int ridx;
5740                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5741                         struct ieee80211_rate *srate =
5742                                 &sband->bitrates[ridx];
5743                         if (rate == srate->bitrate) {
5744                                 mask |= 1 << ridx;
5745                                 break;
5746                         }
5747                 }
5748                 if (ridx == sband->n_bitrates)
5749                         return 0; /* rate not found */
5750         }
5751
5752         return mask;
5753 }
5754
5755 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5756                                u8 *rates, u8 rates_len,
5757                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5758 {
5759         u8 i;
5760
5761         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5762
5763         for (i = 0; i < rates_len; i++) {
5764                 int ridx, rbit;
5765
5766                 ridx = rates[i] / 8;
5767                 rbit = BIT(rates[i] % 8);
5768
5769                 /* check validity */
5770                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5771                         return false;
5772
5773                 /* check availability */
5774                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5775                         mcs[ridx] |= rbit;
5776                 else
5777                         return false;
5778         }
5779
5780         return true;
5781 }
5782
5783 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5784         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5785                                     .len = NL80211_MAX_SUPP_RATES },
5786         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5787                                  .len = NL80211_MAX_SUPP_HT_RATES },
5788 };
5789
5790 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5791                                        struct genl_info *info)
5792 {
5793         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5795         struct cfg80211_bitrate_mask mask;
5796         int rem, i;
5797         struct net_device *dev = info->user_ptr[1];
5798         struct nlattr *tx_rates;
5799         struct ieee80211_supported_band *sband;
5800
5801         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5802                 return -EINVAL;
5803
5804         if (!rdev->ops->set_bitrate_mask)
5805                 return -EOPNOTSUPP;
5806
5807         memset(&mask, 0, sizeof(mask));
5808         /* Default to all rates enabled */
5809         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5810                 sband = rdev->wiphy.bands[i];
5811                 mask.control[i].legacy =
5812                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5813                 if (sband)
5814                         memcpy(mask.control[i].mcs,
5815                                sband->ht_cap.mcs.rx_mask,
5816                                sizeof(mask.control[i].mcs));
5817                 else
5818                         memset(mask.control[i].mcs, 0,
5819                                sizeof(mask.control[i].mcs));
5820         }
5821
5822         /*
5823          * The nested attribute uses enum nl80211_band as the index. This maps
5824          * directly to the enum ieee80211_band values used in cfg80211.
5825          */
5826         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5827         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5828         {
5829                 enum ieee80211_band band = nla_type(tx_rates);
5830                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5831                         return -EINVAL;
5832                 sband = rdev->wiphy.bands[band];
5833                 if (sband == NULL)
5834                         return -EINVAL;
5835                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5836                           nla_len(tx_rates), nl80211_txattr_policy);
5837                 if (tb[NL80211_TXRATE_LEGACY]) {
5838                         mask.control[band].legacy = rateset_to_mask(
5839                                 sband,
5840                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5841                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5842                         if ((mask.control[band].legacy == 0) &&
5843                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5844                                 return -EINVAL;
5845                 }
5846                 if (tb[NL80211_TXRATE_MCS]) {
5847                         if (!ht_rateset_to_mask(
5848                                         sband,
5849                                         nla_data(tb[NL80211_TXRATE_MCS]),
5850                                         nla_len(tb[NL80211_TXRATE_MCS]),
5851                                         mask.control[band].mcs))
5852                                 return -EINVAL;
5853                 }
5854
5855                 if (mask.control[band].legacy == 0) {
5856                         /* don't allow empty legacy rates if HT
5857                          * is not even supported. */
5858                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5859                                 return -EINVAL;
5860
5861                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5862                                 if (mask.control[band].mcs[i])
5863                                         break;
5864
5865                         /* legacy and mcs rates may not be both empty */
5866                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5867                                 return -EINVAL;
5868                 }
5869         }
5870
5871         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5872 }
5873
5874 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5875 {
5876         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5877         struct net_device *dev = info->user_ptr[1];
5878         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5879
5880         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5881                 return -EINVAL;
5882
5883         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5884                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5885
5886         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5887             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5888             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5889             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5890             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5891             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5892             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5893                 return -EOPNOTSUPP;
5894
5895         /* not much point in registering if we can't reply */
5896         if (!rdev->ops->mgmt_tx)
5897                 return -EOPNOTSUPP;
5898
5899         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5900                         frame_type,
5901                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5902                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5903 }
5904
5905 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5906 {
5907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5908         struct net_device *dev = info->user_ptr[1];
5909         struct ieee80211_channel *chan;
5910         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5911         bool channel_type_valid = false;
5912         u32 freq;
5913         int err;
5914         void *hdr = NULL;
5915         u64 cookie;
5916         struct sk_buff *msg = NULL;
5917         unsigned int wait = 0;
5918         bool offchan, no_cck, dont_wait_for_ack;
5919
5920         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5921
5922         if (!info->attrs[NL80211_ATTR_FRAME] ||
5923             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5924                 return -EINVAL;
5925
5926         if (!rdev->ops->mgmt_tx)
5927                 return -EOPNOTSUPP;
5928
5929         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5930             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5931             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5932             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5933             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5934             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5935             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5936                 return -EOPNOTSUPP;
5937
5938         if (info->attrs[NL80211_ATTR_DURATION]) {
5939                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5940                         return -EINVAL;
5941                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5942
5943                 /*
5944                  * We should wait on the channel for at least a minimum amount
5945                  * of time (10ms) but no longer than the driver supports.
5946                  */
5947                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5948                     wait > rdev->wiphy.max_remain_on_channel_duration)
5949                         return -EINVAL;
5950
5951         }
5952
5953         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5954                 if (!nl80211_valid_channel_type(info, &channel_type))
5955                         return -EINVAL;
5956                 channel_type_valid = true;
5957         }
5958
5959         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5960
5961         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5962                 return -EINVAL;
5963
5964         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5965
5966         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5967         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5968         if (chan == NULL)
5969                 return -EINVAL;
5970
5971         if (!dont_wait_for_ack) {
5972                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5973                 if (!msg)
5974                         return -ENOMEM;
5975
5976                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5977                                      NL80211_CMD_FRAME);
5978
5979                 if (IS_ERR(hdr)) {
5980                         err = PTR_ERR(hdr);
5981                         goto free_msg;
5982                 }
5983         }
5984
5985         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5986                                     channel_type_valid, wait,
5987                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5988                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5989                                     no_cck, dont_wait_for_ack, &cookie);
5990         if (err)
5991                 goto free_msg;
5992
5993         if (msg) {
5994                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5995                         goto nla_put_failure;
5996
5997                 genlmsg_end(msg, hdr);
5998                 return genlmsg_reply(msg, info);
5999         }
6000
6001         return 0;
6002
6003  nla_put_failure:
6004         err = -ENOBUFS;
6005  free_msg:
6006         nlmsg_free(msg);
6007         return err;
6008 }
6009
6010 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6011 {
6012         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6013         struct net_device *dev = info->user_ptr[1];
6014         u64 cookie;
6015
6016         if (!info->attrs[NL80211_ATTR_COOKIE])
6017                 return -EINVAL;
6018
6019         if (!rdev->ops->mgmt_tx_cancel_wait)
6020                 return -EOPNOTSUPP;
6021
6022         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6023             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6024             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6025             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6026             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6027             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6028                 return -EOPNOTSUPP;
6029
6030         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6031
6032         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6033 }
6034
6035 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6036 {
6037         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6038         struct wireless_dev *wdev;
6039         struct net_device *dev = info->user_ptr[1];
6040         u8 ps_state;
6041         bool state;
6042         int err;
6043
6044         if (!info->attrs[NL80211_ATTR_PS_STATE])
6045                 return -EINVAL;
6046
6047         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6048
6049         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6050                 return -EINVAL;
6051
6052         wdev = dev->ieee80211_ptr;
6053
6054         if (!rdev->ops->set_power_mgmt)
6055                 return -EOPNOTSUPP;
6056
6057         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6058
6059         if (state == wdev->ps)
6060                 return 0;
6061
6062         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6063                                         wdev->ps_timeout);
6064         if (!err)
6065                 wdev->ps = state;
6066         return err;
6067 }
6068
6069 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6070 {
6071         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6072         enum nl80211_ps_state ps_state;
6073         struct wireless_dev *wdev;
6074         struct net_device *dev = info->user_ptr[1];
6075         struct sk_buff *msg;
6076         void *hdr;
6077         int err;
6078
6079         wdev = dev->ieee80211_ptr;
6080
6081         if (!rdev->ops->set_power_mgmt)
6082                 return -EOPNOTSUPP;
6083
6084         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6085         if (!msg)
6086                 return -ENOMEM;
6087
6088         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6089                              NL80211_CMD_GET_POWER_SAVE);
6090         if (!hdr) {
6091                 err = -ENOBUFS;
6092                 goto free_msg;
6093         }
6094
6095         if (wdev->ps)
6096                 ps_state = NL80211_PS_ENABLED;
6097         else
6098                 ps_state = NL80211_PS_DISABLED;
6099
6100         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6101                 goto nla_put_failure;
6102
6103         genlmsg_end(msg, hdr);
6104         return genlmsg_reply(msg, info);
6105
6106  nla_put_failure:
6107         err = -ENOBUFS;
6108  free_msg:
6109         nlmsg_free(msg);
6110         return err;
6111 }
6112
6113 static struct nla_policy
6114 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6115         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6116         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6117         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6118 };
6119
6120 static int nl80211_set_cqm_rssi(struct genl_info *info,
6121                                 s32 threshold, u32 hysteresis)
6122 {
6123         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6124         struct wireless_dev *wdev;
6125         struct net_device *dev = info->user_ptr[1];
6126
6127         if (threshold > 0)
6128                 return -EINVAL;
6129
6130         wdev = dev->ieee80211_ptr;
6131
6132         if (!rdev->ops->set_cqm_rssi_config)
6133                 return -EOPNOTSUPP;
6134
6135         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6136             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6137                 return -EOPNOTSUPP;
6138
6139         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6140                                               threshold, hysteresis);
6141 }
6142
6143 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6144 {
6145         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6146         struct nlattr *cqm;
6147         int err;
6148
6149         cqm = info->attrs[NL80211_ATTR_CQM];
6150         if (!cqm) {
6151                 err = -EINVAL;
6152                 goto out;
6153         }
6154
6155         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6156                                nl80211_attr_cqm_policy);
6157         if (err)
6158                 goto out;
6159
6160         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6161             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6162                 s32 threshold;
6163                 u32 hysteresis;
6164                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6165                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6166                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6167         } else
6168                 err = -EINVAL;
6169
6170 out:
6171         return err;
6172 }
6173
6174 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6175 {
6176         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6177         struct net_device *dev = info->user_ptr[1];
6178         struct mesh_config cfg;
6179         struct mesh_setup setup;
6180         int err;
6181
6182         /* start with default */
6183         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6184         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6185
6186         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6187                 /* and parse parameters if given */
6188                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6189                 if (err)
6190                         return err;
6191         }
6192
6193         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6194             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6195                 return -EINVAL;
6196
6197         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6198         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6199
6200         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6201             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6202                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6203                         return -EINVAL;
6204
6205         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6206                 /* parse additional setup parameters if given */
6207                 err = nl80211_parse_mesh_setup(info, &setup);
6208                 if (err)
6209                         return err;
6210         }
6211
6212         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6213                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6214
6215                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6216                     !nl80211_valid_channel_type(info, &channel_type))
6217                         return -EINVAL;
6218
6219                 setup.channel = rdev_freq_to_chan(rdev,
6220                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6221                         channel_type);
6222                 if (!setup.channel)
6223                         return -EINVAL;
6224                 setup.channel_type = channel_type;
6225         } else {
6226                 /* cfg80211_join_mesh() will sort it out */
6227                 setup.channel = NULL;
6228         }
6229
6230         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6231 }
6232
6233 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6234 {
6235         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6236         struct net_device *dev = info->user_ptr[1];
6237
6238         return cfg80211_leave_mesh(rdev, dev);
6239 }
6240
6241 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6242 {
6243         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6244         struct sk_buff *msg;
6245         void *hdr;
6246
6247         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6248                 return -EOPNOTSUPP;
6249
6250         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6251         if (!msg)
6252                 return -ENOMEM;
6253
6254         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6255                              NL80211_CMD_GET_WOWLAN);
6256         if (!hdr)
6257                 goto nla_put_failure;
6258
6259         if (rdev->wowlan) {
6260                 struct nlattr *nl_wowlan;
6261
6262                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6263                 if (!nl_wowlan)
6264                         goto nla_put_failure;
6265
6266                 if ((rdev->wowlan->any &&
6267                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6268                     (rdev->wowlan->disconnect &&
6269                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6270                     (rdev->wowlan->magic_pkt &&
6271                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6272                     (rdev->wowlan->gtk_rekey_failure &&
6273                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6274                     (rdev->wowlan->eap_identity_req &&
6275                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6276                     (rdev->wowlan->four_way_handshake &&
6277                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6278                     (rdev->wowlan->rfkill_release &&
6279                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6280                         goto nla_put_failure;
6281                 if (rdev->wowlan->n_patterns) {
6282                         struct nlattr *nl_pats, *nl_pat;
6283                         int i, pat_len;
6284
6285                         nl_pats = nla_nest_start(msg,
6286                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6287                         if (!nl_pats)
6288                                 goto nla_put_failure;
6289
6290                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6291                                 nl_pat = nla_nest_start(msg, i + 1);
6292                                 if (!nl_pat)
6293                                         goto nla_put_failure;
6294                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6295                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6296                                             DIV_ROUND_UP(pat_len, 8),
6297                                             rdev->wowlan->patterns[i].mask) ||
6298                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6299                                             pat_len,
6300                                             rdev->wowlan->patterns[i].pattern))
6301                                         goto nla_put_failure;
6302                                 nla_nest_end(msg, nl_pat);
6303                         }
6304                         nla_nest_end(msg, nl_pats);
6305                 }
6306
6307                 nla_nest_end(msg, nl_wowlan);
6308         }
6309
6310         genlmsg_end(msg, hdr);
6311         return genlmsg_reply(msg, info);
6312
6313 nla_put_failure:
6314         nlmsg_free(msg);
6315         return -ENOBUFS;
6316 }
6317
6318 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6319 {
6320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6321         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6322         struct cfg80211_wowlan no_triggers = {};
6323         struct cfg80211_wowlan new_triggers = {};
6324         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6325         int err, i;
6326         bool prev_enabled = rdev->wowlan;
6327
6328         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6329                 return -EOPNOTSUPP;
6330
6331         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6332                 goto no_triggers;
6333
6334         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6335                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6336                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6337                         nl80211_wowlan_policy);
6338         if (err)
6339                 return err;
6340
6341         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6342                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6343                         return -EINVAL;
6344                 new_triggers.any = true;
6345         }
6346
6347         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6348                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6349                         return -EINVAL;
6350                 new_triggers.disconnect = true;
6351         }
6352
6353         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6354                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6355                         return -EINVAL;
6356                 new_triggers.magic_pkt = true;
6357         }
6358
6359         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6360                 return -EINVAL;
6361
6362         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6363                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6364                         return -EINVAL;
6365                 new_triggers.gtk_rekey_failure = true;
6366         }
6367
6368         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6369                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6370                         return -EINVAL;
6371                 new_triggers.eap_identity_req = true;
6372         }
6373
6374         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6375                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6376                         return -EINVAL;
6377                 new_triggers.four_way_handshake = true;
6378         }
6379
6380         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6381                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6382                         return -EINVAL;
6383                 new_triggers.rfkill_release = true;
6384         }
6385
6386         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6387                 struct nlattr *pat;
6388                 int n_patterns = 0;
6389                 int rem, pat_len, mask_len;
6390                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6391
6392                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6393                                     rem)
6394                         n_patterns++;
6395                 if (n_patterns > wowlan->n_patterns)
6396                         return -EINVAL;
6397
6398                 new_triggers.patterns = kcalloc(n_patterns,
6399                                                 sizeof(new_triggers.patterns[0]),
6400                                                 GFP_KERNEL);
6401                 if (!new_triggers.patterns)
6402                         return -ENOMEM;
6403
6404                 new_triggers.n_patterns = n_patterns;
6405                 i = 0;
6406
6407                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6408                                     rem) {
6409                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6410                                   nla_data(pat), nla_len(pat), NULL);
6411                         err = -EINVAL;
6412                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6413                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6414                                 goto error;
6415                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6416                         mask_len = DIV_ROUND_UP(pat_len, 8);
6417                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6418                             mask_len)
6419                                 goto error;
6420                         if (pat_len > wowlan->pattern_max_len ||
6421                             pat_len < wowlan->pattern_min_len)
6422                                 goto error;
6423
6424                         new_triggers.patterns[i].mask =
6425                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6426                         if (!new_triggers.patterns[i].mask) {
6427                                 err = -ENOMEM;
6428                                 goto error;
6429                         }
6430                         new_triggers.patterns[i].pattern =
6431                                 new_triggers.patterns[i].mask + mask_len;
6432                         memcpy(new_triggers.patterns[i].mask,
6433                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6434                                mask_len);
6435                         new_triggers.patterns[i].pattern_len = pat_len;
6436                         memcpy(new_triggers.patterns[i].pattern,
6437                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6438                                pat_len);
6439                         i++;
6440                 }
6441         }
6442
6443         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6444                 struct cfg80211_wowlan *ntrig;
6445                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6446                                 GFP_KERNEL);
6447                 if (!ntrig) {
6448                         err = -ENOMEM;
6449                         goto error;
6450                 }
6451                 cfg80211_rdev_free_wowlan(rdev);
6452                 rdev->wowlan = ntrig;
6453         } else {
6454  no_triggers:
6455                 cfg80211_rdev_free_wowlan(rdev);
6456                 rdev->wowlan = NULL;
6457         }
6458
6459         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6460                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6461
6462         return 0;
6463  error:
6464         for (i = 0; i < new_triggers.n_patterns; i++)
6465                 kfree(new_triggers.patterns[i].mask);
6466         kfree(new_triggers.patterns);
6467         return err;
6468 }
6469
6470 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6471 {
6472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6473         struct net_device *dev = info->user_ptr[1];
6474         struct wireless_dev *wdev = dev->ieee80211_ptr;
6475         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6476         struct cfg80211_gtk_rekey_data rekey_data;
6477         int err;
6478
6479         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6480                 return -EINVAL;
6481
6482         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6483                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6484                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6485                         nl80211_rekey_policy);
6486         if (err)
6487                 return err;
6488
6489         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6490                 return -ERANGE;
6491         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6492                 return -ERANGE;
6493         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6494                 return -ERANGE;
6495
6496         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6497                NL80211_KEK_LEN);
6498         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6499                NL80211_KCK_LEN);
6500         memcpy(rekey_data.replay_ctr,
6501                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6502                NL80211_REPLAY_CTR_LEN);
6503
6504         wdev_lock(wdev);
6505         if (!wdev->current_bss) {
6506                 err = -ENOTCONN;
6507                 goto out;
6508         }
6509
6510         if (!rdev->ops->set_rekey_data) {
6511                 err = -EOPNOTSUPP;
6512                 goto out;
6513         }
6514
6515         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6516  out:
6517         wdev_unlock(wdev);
6518         return err;
6519 }
6520
6521 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6522                                              struct genl_info *info)
6523 {
6524         struct net_device *dev = info->user_ptr[1];
6525         struct wireless_dev *wdev = dev->ieee80211_ptr;
6526
6527         if (wdev->iftype != NL80211_IFTYPE_AP &&
6528             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6529                 return -EINVAL;
6530
6531         if (wdev->ap_unexpected_nlpid)
6532                 return -EBUSY;
6533
6534         wdev->ap_unexpected_nlpid = info->snd_pid;
6535         return 0;
6536 }
6537
6538 static int nl80211_probe_client(struct sk_buff *skb,
6539                                 struct genl_info *info)
6540 {
6541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6542         struct net_device *dev = info->user_ptr[1];
6543         struct wireless_dev *wdev = dev->ieee80211_ptr;
6544         struct sk_buff *msg;
6545         void *hdr;
6546         const u8 *addr;
6547         u64 cookie;
6548         int err;
6549
6550         if (wdev->iftype != NL80211_IFTYPE_AP &&
6551             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6552                 return -EOPNOTSUPP;
6553
6554         if (!info->attrs[NL80211_ATTR_MAC])
6555                 return -EINVAL;
6556
6557         if (!rdev->ops->probe_client)
6558                 return -EOPNOTSUPP;
6559
6560         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6561         if (!msg)
6562                 return -ENOMEM;
6563
6564         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6565                              NL80211_CMD_PROBE_CLIENT);
6566
6567         if (IS_ERR(hdr)) {
6568                 err = PTR_ERR(hdr);
6569                 goto free_msg;
6570         }
6571
6572         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6573
6574         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6575         if (err)
6576                 goto free_msg;
6577
6578         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6579                 goto nla_put_failure;
6580
6581         genlmsg_end(msg, hdr);
6582
6583         return genlmsg_reply(msg, info);
6584
6585  nla_put_failure:
6586         err = -ENOBUFS;
6587  free_msg:
6588         nlmsg_free(msg);
6589         return err;
6590 }
6591
6592 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6593 {
6594         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6595
6596         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6597                 return -EOPNOTSUPP;
6598
6599         if (rdev->ap_beacons_nlpid)
6600                 return -EBUSY;
6601
6602         rdev->ap_beacons_nlpid = info->snd_pid;
6603
6604         return 0;
6605 }
6606
6607 #define NL80211_FLAG_NEED_WIPHY         0x01
6608 #define NL80211_FLAG_NEED_NETDEV        0x02
6609 #define NL80211_FLAG_NEED_RTNL          0x04
6610 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6611 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6612                                          NL80211_FLAG_CHECK_NETDEV_UP)
6613
6614 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6615                             struct genl_info *info)
6616 {
6617         struct cfg80211_registered_device *rdev;
6618         struct net_device *dev;
6619         int err;
6620         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6621
6622         if (rtnl)
6623                 rtnl_lock();
6624
6625         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6626                 rdev = cfg80211_get_dev_from_info(info);
6627                 if (IS_ERR(rdev)) {
6628                         if (rtnl)
6629                                 rtnl_unlock();
6630                         return PTR_ERR(rdev);
6631                 }
6632                 info->user_ptr[0] = rdev;
6633         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6634                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6635                                               &rdev, &dev);
6636                 if (err) {
6637                         if (rtnl)
6638                                 rtnl_unlock();
6639                         return err;
6640                 }
6641                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6642                     !netif_running(dev)) {
6643                         cfg80211_unlock_rdev(rdev);
6644                         dev_put(dev);
6645                         if (rtnl)
6646                                 rtnl_unlock();
6647                         return -ENETDOWN;
6648                 }
6649                 info->user_ptr[0] = rdev;
6650                 info->user_ptr[1] = dev;
6651         }
6652
6653         return 0;
6654 }
6655
6656 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6657                               struct genl_info *info)
6658 {
6659         if (info->user_ptr[0])
6660                 cfg80211_unlock_rdev(info->user_ptr[0]);
6661         if (info->user_ptr[1])
6662                 dev_put(info->user_ptr[1]);
6663         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6664                 rtnl_unlock();
6665 }
6666
6667 static struct genl_ops nl80211_ops[] = {
6668         {
6669                 .cmd = NL80211_CMD_GET_WIPHY,
6670                 .doit = nl80211_get_wiphy,
6671                 .dumpit = nl80211_dump_wiphy,
6672                 .policy = nl80211_policy,
6673                 /* can be retrieved by unprivileged users */
6674                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6675         },
6676         {
6677                 .cmd = NL80211_CMD_SET_WIPHY,
6678                 .doit = nl80211_set_wiphy,
6679                 .policy = nl80211_policy,
6680                 .flags = GENL_ADMIN_PERM,
6681                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6682         },
6683         {
6684                 .cmd = NL80211_CMD_GET_INTERFACE,
6685                 .doit = nl80211_get_interface,
6686                 .dumpit = nl80211_dump_interface,
6687                 .policy = nl80211_policy,
6688                 /* can be retrieved by unprivileged users */
6689                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6690         },
6691         {
6692                 .cmd = NL80211_CMD_SET_INTERFACE,
6693                 .doit = nl80211_set_interface,
6694                 .policy = nl80211_policy,
6695                 .flags = GENL_ADMIN_PERM,
6696                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6697                                   NL80211_FLAG_NEED_RTNL,
6698         },
6699         {
6700                 .cmd = NL80211_CMD_NEW_INTERFACE,
6701                 .doit = nl80211_new_interface,
6702                 .policy = nl80211_policy,
6703                 .flags = GENL_ADMIN_PERM,
6704                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6705                                   NL80211_FLAG_NEED_RTNL,
6706         },
6707         {
6708                 .cmd = NL80211_CMD_DEL_INTERFACE,
6709                 .doit = nl80211_del_interface,
6710                 .policy = nl80211_policy,
6711                 .flags = GENL_ADMIN_PERM,
6712                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6713                                   NL80211_FLAG_NEED_RTNL,
6714         },
6715         {
6716                 .cmd = NL80211_CMD_GET_KEY,
6717                 .doit = nl80211_get_key,
6718                 .policy = nl80211_policy,
6719                 .flags = GENL_ADMIN_PERM,
6720                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6721                                   NL80211_FLAG_NEED_RTNL,
6722         },
6723         {
6724                 .cmd = NL80211_CMD_SET_KEY,
6725                 .doit = nl80211_set_key,
6726                 .policy = nl80211_policy,
6727                 .flags = GENL_ADMIN_PERM,
6728                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6729                                   NL80211_FLAG_NEED_RTNL,
6730         },
6731         {
6732                 .cmd = NL80211_CMD_NEW_KEY,
6733                 .doit = nl80211_new_key,
6734                 .policy = nl80211_policy,
6735                 .flags = GENL_ADMIN_PERM,
6736                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6737                                   NL80211_FLAG_NEED_RTNL,
6738         },
6739         {
6740                 .cmd = NL80211_CMD_DEL_KEY,
6741                 .doit = nl80211_del_key,
6742                 .policy = nl80211_policy,
6743                 .flags = GENL_ADMIN_PERM,
6744                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6745                                   NL80211_FLAG_NEED_RTNL,
6746         },
6747         {
6748                 .cmd = NL80211_CMD_SET_BEACON,
6749                 .policy = nl80211_policy,
6750                 .flags = GENL_ADMIN_PERM,
6751                 .doit = nl80211_set_beacon,
6752                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6753                                   NL80211_FLAG_NEED_RTNL,
6754         },
6755         {
6756                 .cmd = NL80211_CMD_START_AP,
6757                 .policy = nl80211_policy,
6758                 .flags = GENL_ADMIN_PERM,
6759                 .doit = nl80211_start_ap,
6760                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6761                                   NL80211_FLAG_NEED_RTNL,
6762         },
6763         {
6764                 .cmd = NL80211_CMD_STOP_AP,
6765                 .policy = nl80211_policy,
6766                 .flags = GENL_ADMIN_PERM,
6767                 .doit = nl80211_stop_ap,
6768                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6769                                   NL80211_FLAG_NEED_RTNL,
6770         },
6771         {
6772                 .cmd = NL80211_CMD_GET_STATION,
6773                 .doit = nl80211_get_station,
6774                 .dumpit = nl80211_dump_station,
6775                 .policy = nl80211_policy,
6776                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6777                                   NL80211_FLAG_NEED_RTNL,
6778         },
6779         {
6780                 .cmd = NL80211_CMD_SET_STATION,
6781                 .doit = nl80211_set_station,
6782                 .policy = nl80211_policy,
6783                 .flags = GENL_ADMIN_PERM,
6784                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6785                                   NL80211_FLAG_NEED_RTNL,
6786         },
6787         {
6788                 .cmd = NL80211_CMD_NEW_STATION,
6789                 .doit = nl80211_new_station,
6790                 .policy = nl80211_policy,
6791                 .flags = GENL_ADMIN_PERM,
6792                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6793                                   NL80211_FLAG_NEED_RTNL,
6794         },
6795         {
6796                 .cmd = NL80211_CMD_DEL_STATION,
6797                 .doit = nl80211_del_station,
6798                 .policy = nl80211_policy,
6799                 .flags = GENL_ADMIN_PERM,
6800                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6801                                   NL80211_FLAG_NEED_RTNL,
6802         },
6803         {
6804                 .cmd = NL80211_CMD_GET_MPATH,
6805                 .doit = nl80211_get_mpath,
6806                 .dumpit = nl80211_dump_mpath,
6807                 .policy = nl80211_policy,
6808                 .flags = GENL_ADMIN_PERM,
6809                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6810                                   NL80211_FLAG_NEED_RTNL,
6811         },
6812         {
6813                 .cmd = NL80211_CMD_SET_MPATH,
6814                 .doit = nl80211_set_mpath,
6815                 .policy = nl80211_policy,
6816                 .flags = GENL_ADMIN_PERM,
6817                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6818                                   NL80211_FLAG_NEED_RTNL,
6819         },
6820         {
6821                 .cmd = NL80211_CMD_NEW_MPATH,
6822                 .doit = nl80211_new_mpath,
6823                 .policy = nl80211_policy,
6824                 .flags = GENL_ADMIN_PERM,
6825                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6826                                   NL80211_FLAG_NEED_RTNL,
6827         },
6828         {
6829                 .cmd = NL80211_CMD_DEL_MPATH,
6830                 .doit = nl80211_del_mpath,
6831                 .policy = nl80211_policy,
6832                 .flags = GENL_ADMIN_PERM,
6833                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6834                                   NL80211_FLAG_NEED_RTNL,
6835         },
6836         {
6837                 .cmd = NL80211_CMD_SET_BSS,
6838                 .doit = nl80211_set_bss,
6839                 .policy = nl80211_policy,
6840                 .flags = GENL_ADMIN_PERM,
6841                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6842                                   NL80211_FLAG_NEED_RTNL,
6843         },
6844         {
6845                 .cmd = NL80211_CMD_GET_REG,
6846                 .doit = nl80211_get_reg,
6847                 .policy = nl80211_policy,
6848                 /* can be retrieved by unprivileged users */
6849         },
6850         {
6851                 .cmd = NL80211_CMD_SET_REG,
6852                 .doit = nl80211_set_reg,
6853                 .policy = nl80211_policy,
6854                 .flags = GENL_ADMIN_PERM,
6855         },
6856         {
6857                 .cmd = NL80211_CMD_REQ_SET_REG,
6858                 .doit = nl80211_req_set_reg,
6859                 .policy = nl80211_policy,
6860                 .flags = GENL_ADMIN_PERM,
6861         },
6862         {
6863                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6864                 .doit = nl80211_get_mesh_config,
6865                 .policy = nl80211_policy,
6866                 /* can be retrieved by unprivileged users */
6867                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6868                                   NL80211_FLAG_NEED_RTNL,
6869         },
6870         {
6871                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6872                 .doit = nl80211_update_mesh_config,
6873                 .policy = nl80211_policy,
6874                 .flags = GENL_ADMIN_PERM,
6875                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6876                                   NL80211_FLAG_NEED_RTNL,
6877         },
6878         {
6879                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6880                 .doit = nl80211_trigger_scan,
6881                 .policy = nl80211_policy,
6882                 .flags = GENL_ADMIN_PERM,
6883                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6884                                   NL80211_FLAG_NEED_RTNL,
6885         },
6886         {
6887                 .cmd = NL80211_CMD_GET_SCAN,
6888                 .policy = nl80211_policy,
6889                 .dumpit = nl80211_dump_scan,
6890         },
6891         {
6892                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6893                 .doit = nl80211_start_sched_scan,
6894                 .policy = nl80211_policy,
6895                 .flags = GENL_ADMIN_PERM,
6896                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6897                                   NL80211_FLAG_NEED_RTNL,
6898         },
6899         {
6900                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6901                 .doit = nl80211_stop_sched_scan,
6902                 .policy = nl80211_policy,
6903                 .flags = GENL_ADMIN_PERM,
6904                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6905                                   NL80211_FLAG_NEED_RTNL,
6906         },
6907         {
6908                 .cmd = NL80211_CMD_AUTHENTICATE,
6909                 .doit = nl80211_authenticate,
6910                 .policy = nl80211_policy,
6911                 .flags = GENL_ADMIN_PERM,
6912                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6913                                   NL80211_FLAG_NEED_RTNL,
6914         },
6915         {
6916                 .cmd = NL80211_CMD_ASSOCIATE,
6917                 .doit = nl80211_associate,
6918                 .policy = nl80211_policy,
6919                 .flags = GENL_ADMIN_PERM,
6920                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6921                                   NL80211_FLAG_NEED_RTNL,
6922         },
6923         {
6924                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6925                 .doit = nl80211_deauthenticate,
6926                 .policy = nl80211_policy,
6927                 .flags = GENL_ADMIN_PERM,
6928                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6929                                   NL80211_FLAG_NEED_RTNL,
6930         },
6931         {
6932                 .cmd = NL80211_CMD_DISASSOCIATE,
6933                 .doit = nl80211_disassociate,
6934                 .policy = nl80211_policy,
6935                 .flags = GENL_ADMIN_PERM,
6936                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6937                                   NL80211_FLAG_NEED_RTNL,
6938         },
6939         {
6940                 .cmd = NL80211_CMD_JOIN_IBSS,
6941                 .doit = nl80211_join_ibss,
6942                 .policy = nl80211_policy,
6943                 .flags = GENL_ADMIN_PERM,
6944                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6945                                   NL80211_FLAG_NEED_RTNL,
6946         },
6947         {
6948                 .cmd = NL80211_CMD_LEAVE_IBSS,
6949                 .doit = nl80211_leave_ibss,
6950                 .policy = nl80211_policy,
6951                 .flags = GENL_ADMIN_PERM,
6952                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6953                                   NL80211_FLAG_NEED_RTNL,
6954         },
6955 #ifdef CONFIG_NL80211_TESTMODE
6956         {
6957                 .cmd = NL80211_CMD_TESTMODE,
6958                 .doit = nl80211_testmode_do,
6959                 .dumpit = nl80211_testmode_dump,
6960                 .policy = nl80211_policy,
6961                 .flags = GENL_ADMIN_PERM,
6962                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6963                                   NL80211_FLAG_NEED_RTNL,
6964         },
6965 #endif
6966         {
6967                 .cmd = NL80211_CMD_CONNECT,
6968                 .doit = nl80211_connect,
6969                 .policy = nl80211_policy,
6970                 .flags = GENL_ADMIN_PERM,
6971                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6972                                   NL80211_FLAG_NEED_RTNL,
6973         },
6974         {
6975                 .cmd = NL80211_CMD_DISCONNECT,
6976                 .doit = nl80211_disconnect,
6977                 .policy = nl80211_policy,
6978                 .flags = GENL_ADMIN_PERM,
6979                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6980                                   NL80211_FLAG_NEED_RTNL,
6981         },
6982         {
6983                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6984                 .doit = nl80211_wiphy_netns,
6985                 .policy = nl80211_policy,
6986                 .flags = GENL_ADMIN_PERM,
6987                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6988                                   NL80211_FLAG_NEED_RTNL,
6989         },
6990         {
6991                 .cmd = NL80211_CMD_GET_SURVEY,
6992                 .policy = nl80211_policy,
6993                 .dumpit = nl80211_dump_survey,
6994         },
6995         {
6996                 .cmd = NL80211_CMD_SET_PMKSA,
6997                 .doit = nl80211_setdel_pmksa,
6998                 .policy = nl80211_policy,
6999                 .flags = GENL_ADMIN_PERM,
7000                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7001                                   NL80211_FLAG_NEED_RTNL,
7002         },
7003         {
7004                 .cmd = NL80211_CMD_DEL_PMKSA,
7005                 .doit = nl80211_setdel_pmksa,
7006                 .policy = nl80211_policy,
7007                 .flags = GENL_ADMIN_PERM,
7008                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7009                                   NL80211_FLAG_NEED_RTNL,
7010         },
7011         {
7012                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7013                 .doit = nl80211_flush_pmksa,
7014                 .policy = nl80211_policy,
7015                 .flags = GENL_ADMIN_PERM,
7016                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7017                                   NL80211_FLAG_NEED_RTNL,
7018         },
7019         {
7020                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7021                 .doit = nl80211_remain_on_channel,
7022                 .policy = nl80211_policy,
7023                 .flags = GENL_ADMIN_PERM,
7024                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7025                                   NL80211_FLAG_NEED_RTNL,
7026         },
7027         {
7028                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7029                 .doit = nl80211_cancel_remain_on_channel,
7030                 .policy = nl80211_policy,
7031                 .flags = GENL_ADMIN_PERM,
7032                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7033                                   NL80211_FLAG_NEED_RTNL,
7034         },
7035         {
7036                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7037                 .doit = nl80211_set_tx_bitrate_mask,
7038                 .policy = nl80211_policy,
7039                 .flags = GENL_ADMIN_PERM,
7040                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7041                                   NL80211_FLAG_NEED_RTNL,
7042         },
7043         {
7044                 .cmd = NL80211_CMD_REGISTER_FRAME,
7045                 .doit = nl80211_register_mgmt,
7046                 .policy = nl80211_policy,
7047                 .flags = GENL_ADMIN_PERM,
7048                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7049                                   NL80211_FLAG_NEED_RTNL,
7050         },
7051         {
7052                 .cmd = NL80211_CMD_FRAME,
7053                 .doit = nl80211_tx_mgmt,
7054                 .policy = nl80211_policy,
7055                 .flags = GENL_ADMIN_PERM,
7056                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7057                                   NL80211_FLAG_NEED_RTNL,
7058         },
7059         {
7060                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7061                 .doit = nl80211_tx_mgmt_cancel_wait,
7062                 .policy = nl80211_policy,
7063                 .flags = GENL_ADMIN_PERM,
7064                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7065                                   NL80211_FLAG_NEED_RTNL,
7066         },
7067         {
7068                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7069                 .doit = nl80211_set_power_save,
7070                 .policy = nl80211_policy,
7071                 .flags = GENL_ADMIN_PERM,
7072                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7073                                   NL80211_FLAG_NEED_RTNL,
7074         },
7075         {
7076                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7077                 .doit = nl80211_get_power_save,
7078                 .policy = nl80211_policy,
7079                 /* can be retrieved by unprivileged users */
7080                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7081                                   NL80211_FLAG_NEED_RTNL,
7082         },
7083         {
7084                 .cmd = NL80211_CMD_SET_CQM,
7085                 .doit = nl80211_set_cqm,
7086                 .policy = nl80211_policy,
7087                 .flags = GENL_ADMIN_PERM,
7088                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7089                                   NL80211_FLAG_NEED_RTNL,
7090         },
7091         {
7092                 .cmd = NL80211_CMD_SET_CHANNEL,
7093                 .doit = nl80211_set_channel,
7094                 .policy = nl80211_policy,
7095                 .flags = GENL_ADMIN_PERM,
7096                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7097                                   NL80211_FLAG_NEED_RTNL,
7098         },
7099         {
7100                 .cmd = NL80211_CMD_SET_WDS_PEER,
7101                 .doit = nl80211_set_wds_peer,
7102                 .policy = nl80211_policy,
7103                 .flags = GENL_ADMIN_PERM,
7104                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7105                                   NL80211_FLAG_NEED_RTNL,
7106         },
7107         {
7108                 .cmd = NL80211_CMD_JOIN_MESH,
7109                 .doit = nl80211_join_mesh,
7110                 .policy = nl80211_policy,
7111                 .flags = GENL_ADMIN_PERM,
7112                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7113                                   NL80211_FLAG_NEED_RTNL,
7114         },
7115         {
7116                 .cmd = NL80211_CMD_LEAVE_MESH,
7117                 .doit = nl80211_leave_mesh,
7118                 .policy = nl80211_policy,
7119                 .flags = GENL_ADMIN_PERM,
7120                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7121                                   NL80211_FLAG_NEED_RTNL,
7122         },
7123         {
7124                 .cmd = NL80211_CMD_GET_WOWLAN,
7125                 .doit = nl80211_get_wowlan,
7126                 .policy = nl80211_policy,
7127                 /* can be retrieved by unprivileged users */
7128                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7129                                   NL80211_FLAG_NEED_RTNL,
7130         },
7131         {
7132                 .cmd = NL80211_CMD_SET_WOWLAN,
7133                 .doit = nl80211_set_wowlan,
7134                 .policy = nl80211_policy,
7135                 .flags = GENL_ADMIN_PERM,
7136                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7137                                   NL80211_FLAG_NEED_RTNL,
7138         },
7139         {
7140                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7141                 .doit = nl80211_set_rekey_data,
7142                 .policy = nl80211_policy,
7143                 .flags = GENL_ADMIN_PERM,
7144                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7145                                   NL80211_FLAG_NEED_RTNL,
7146         },
7147         {
7148                 .cmd = NL80211_CMD_TDLS_MGMT,
7149                 .doit = nl80211_tdls_mgmt,
7150                 .policy = nl80211_policy,
7151                 .flags = GENL_ADMIN_PERM,
7152                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7153                                   NL80211_FLAG_NEED_RTNL,
7154         },
7155         {
7156                 .cmd = NL80211_CMD_TDLS_OPER,
7157                 .doit = nl80211_tdls_oper,
7158                 .policy = nl80211_policy,
7159                 .flags = GENL_ADMIN_PERM,
7160                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7161                                   NL80211_FLAG_NEED_RTNL,
7162         },
7163         {
7164                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7165                 .doit = nl80211_register_unexpected_frame,
7166                 .policy = nl80211_policy,
7167                 .flags = GENL_ADMIN_PERM,
7168                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7169                                   NL80211_FLAG_NEED_RTNL,
7170         },
7171         {
7172                 .cmd = NL80211_CMD_PROBE_CLIENT,
7173                 .doit = nl80211_probe_client,
7174                 .policy = nl80211_policy,
7175                 .flags = GENL_ADMIN_PERM,
7176                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7177                                   NL80211_FLAG_NEED_RTNL,
7178         },
7179         {
7180                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7181                 .doit = nl80211_register_beacons,
7182                 .policy = nl80211_policy,
7183                 .flags = GENL_ADMIN_PERM,
7184                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7185                                   NL80211_FLAG_NEED_RTNL,
7186         },
7187         {
7188                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7189                 .doit = nl80211_set_noack_map,
7190                 .policy = nl80211_policy,
7191                 .flags = GENL_ADMIN_PERM,
7192                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7193                                   NL80211_FLAG_NEED_RTNL,
7194         },
7195
7196 };
7197
7198 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7199         .name = "mlme",
7200 };
7201
7202 /* multicast groups */
7203 static struct genl_multicast_group nl80211_config_mcgrp = {
7204         .name = "config",
7205 };
7206 static struct genl_multicast_group nl80211_scan_mcgrp = {
7207         .name = "scan",
7208 };
7209 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7210         .name = "regulatory",
7211 };
7212
7213 /* notification functions */
7214
7215 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7216 {
7217         struct sk_buff *msg;
7218
7219         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7220         if (!msg)
7221                 return;
7222
7223         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7224                 nlmsg_free(msg);
7225                 return;
7226         }
7227
7228         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7229                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7230 }
7231
7232 static int nl80211_add_scan_req(struct sk_buff *msg,
7233                                 struct cfg80211_registered_device *rdev)
7234 {
7235         struct cfg80211_scan_request *req = rdev->scan_req;
7236         struct nlattr *nest;
7237         int i;
7238
7239         ASSERT_RDEV_LOCK(rdev);
7240
7241         if (WARN_ON(!req))
7242                 return 0;
7243
7244         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7245         if (!nest)
7246                 goto nla_put_failure;
7247         for (i = 0; i < req->n_ssids; i++) {
7248                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7249                         goto nla_put_failure;
7250         }
7251         nla_nest_end(msg, nest);
7252
7253         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7254         if (!nest)
7255                 goto nla_put_failure;
7256         for (i = 0; i < req->n_channels; i++) {
7257                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7258                         goto nla_put_failure;
7259         }
7260         nla_nest_end(msg, nest);
7261
7262         if (req->ie &&
7263             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7264                 goto nla_put_failure;
7265
7266         return 0;
7267  nla_put_failure:
7268         return -ENOBUFS;
7269 }
7270
7271 static int nl80211_send_scan_msg(struct sk_buff *msg,
7272                                  struct cfg80211_registered_device *rdev,
7273                                  struct net_device *netdev,
7274                                  u32 pid, u32 seq, int flags,
7275                                  u32 cmd)
7276 {
7277         void *hdr;
7278
7279         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7280         if (!hdr)
7281                 return -1;
7282
7283         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7284             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7285                 goto nla_put_failure;
7286
7287         /* ignore errors and send incomplete event anyway */
7288         nl80211_add_scan_req(msg, rdev);
7289
7290         return genlmsg_end(msg, hdr);
7291
7292  nla_put_failure:
7293         genlmsg_cancel(msg, hdr);
7294         return -EMSGSIZE;
7295 }
7296
7297 static int
7298 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7299                             struct cfg80211_registered_device *rdev,
7300                             struct net_device *netdev,
7301                             u32 pid, u32 seq, int flags, u32 cmd)
7302 {
7303         void *hdr;
7304
7305         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7306         if (!hdr)
7307                 return -1;
7308
7309         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7310             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7311                 goto nla_put_failure;
7312
7313         return genlmsg_end(msg, hdr);
7314
7315  nla_put_failure:
7316         genlmsg_cancel(msg, hdr);
7317         return -EMSGSIZE;
7318 }
7319
7320 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7321                              struct net_device *netdev)
7322 {
7323         struct sk_buff *msg;
7324
7325         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7326         if (!msg)
7327                 return;
7328
7329         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7330                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7331                 nlmsg_free(msg);
7332                 return;
7333         }
7334
7335         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7336                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7337 }
7338
7339 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7340                             struct net_device *netdev)
7341 {
7342         struct sk_buff *msg;
7343
7344         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7345         if (!msg)
7346                 return;
7347
7348         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7349                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7350                 nlmsg_free(msg);
7351                 return;
7352         }
7353
7354         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7355                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7356 }
7357
7358 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7359                                struct net_device *netdev)
7360 {
7361         struct sk_buff *msg;
7362
7363         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7364         if (!msg)
7365                 return;
7366
7367         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7368                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7369                 nlmsg_free(msg);
7370                 return;
7371         }
7372
7373         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7374                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7375 }
7376
7377 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7378                                      struct net_device *netdev)
7379 {
7380         struct sk_buff *msg;
7381
7382         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7383         if (!msg)
7384                 return;
7385
7386         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7387                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7388                 nlmsg_free(msg);
7389                 return;
7390         }
7391
7392         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7393                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7394 }
7395
7396 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7397                              struct net_device *netdev, u32 cmd)
7398 {
7399         struct sk_buff *msg;
7400
7401         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7402         if (!msg)
7403                 return;
7404
7405         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7406                 nlmsg_free(msg);
7407                 return;
7408         }
7409
7410         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7411                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7412 }
7413
7414 /*
7415  * This can happen on global regulatory changes or device specific settings
7416  * based on custom world regulatory domains.
7417  */
7418 void nl80211_send_reg_change_event(struct regulatory_request *request)
7419 {
7420         struct sk_buff *msg;
7421         void *hdr;
7422
7423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7424         if (!msg)
7425                 return;
7426
7427         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7428         if (!hdr) {
7429                 nlmsg_free(msg);
7430                 return;
7431         }
7432
7433         /* Userspace can always count this one always being set */
7434         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7435                 goto nla_put_failure;
7436
7437         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7438                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7439                                NL80211_REGDOM_TYPE_WORLD))
7440                         goto nla_put_failure;
7441         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7442                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7443                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7444                         goto nla_put_failure;
7445         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7446                    request->intersect) {
7447                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7448                                NL80211_REGDOM_TYPE_INTERSECTION))
7449                         goto nla_put_failure;
7450         } else {
7451                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7452                                NL80211_REGDOM_TYPE_COUNTRY) ||
7453                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7454                                    request->alpha2))
7455                         goto nla_put_failure;
7456         }
7457
7458         if (wiphy_idx_valid(request->wiphy_idx) &&
7459             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7460                 goto nla_put_failure;
7461
7462         genlmsg_end(msg, hdr);
7463
7464         rcu_read_lock();
7465         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7466                                 GFP_ATOMIC);
7467         rcu_read_unlock();
7468
7469         return;
7470
7471 nla_put_failure:
7472         genlmsg_cancel(msg, hdr);
7473         nlmsg_free(msg);
7474 }
7475
7476 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7477                                     struct net_device *netdev,
7478                                     const u8 *buf, size_t len,
7479                                     enum nl80211_commands cmd, gfp_t gfp)
7480 {
7481         struct sk_buff *msg;
7482         void *hdr;
7483
7484         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7485         if (!msg)
7486                 return;
7487
7488         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7489         if (!hdr) {
7490                 nlmsg_free(msg);
7491                 return;
7492         }
7493
7494         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7495             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7496             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7497                 goto nla_put_failure;
7498
7499         genlmsg_end(msg, hdr);
7500
7501         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7502                                 nl80211_mlme_mcgrp.id, gfp);
7503         return;
7504
7505  nla_put_failure:
7506         genlmsg_cancel(msg, hdr);
7507         nlmsg_free(msg);
7508 }
7509
7510 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7511                           struct net_device *netdev, const u8 *buf,
7512                           size_t len, gfp_t gfp)
7513 {
7514         nl80211_send_mlme_event(rdev, netdev, buf, len,
7515                                 NL80211_CMD_AUTHENTICATE, gfp);
7516 }
7517
7518 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7519                            struct net_device *netdev, const u8 *buf,
7520                            size_t len, gfp_t gfp)
7521 {
7522         nl80211_send_mlme_event(rdev, netdev, buf, len,
7523                                 NL80211_CMD_ASSOCIATE, gfp);
7524 }
7525
7526 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7527                          struct net_device *netdev, const u8 *buf,
7528                          size_t len, gfp_t gfp)
7529 {
7530         nl80211_send_mlme_event(rdev, netdev, buf, len,
7531                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7532 }
7533
7534 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7535                            struct net_device *netdev, const u8 *buf,
7536                            size_t len, gfp_t gfp)
7537 {
7538         nl80211_send_mlme_event(rdev, netdev, buf, len,
7539                                 NL80211_CMD_DISASSOCIATE, gfp);
7540 }
7541
7542 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7543                                 struct net_device *netdev, const u8 *buf,
7544                                 size_t len, gfp_t gfp)
7545 {
7546         nl80211_send_mlme_event(rdev, netdev, buf, len,
7547                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7548 }
7549
7550 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7551                                   struct net_device *netdev, const u8 *buf,
7552                                   size_t len, gfp_t gfp)
7553 {
7554         nl80211_send_mlme_event(rdev, netdev, buf, len,
7555                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7556 }
7557
7558 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7559                                       struct net_device *netdev, int cmd,
7560                                       const u8 *addr, gfp_t gfp)
7561 {
7562         struct sk_buff *msg;
7563         void *hdr;
7564
7565         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7566         if (!msg)
7567                 return;
7568
7569         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7570         if (!hdr) {
7571                 nlmsg_free(msg);
7572                 return;
7573         }
7574
7575         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7576             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7577             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7578             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7579                 goto nla_put_failure;
7580
7581         genlmsg_end(msg, hdr);
7582
7583         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7584                                 nl80211_mlme_mcgrp.id, gfp);
7585         return;
7586
7587  nla_put_failure:
7588         genlmsg_cancel(msg, hdr);
7589         nlmsg_free(msg);
7590 }
7591
7592 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7593                                struct net_device *netdev, const u8 *addr,
7594                                gfp_t gfp)
7595 {
7596         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7597                                   addr, gfp);
7598 }
7599
7600 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7601                                 struct net_device *netdev, const u8 *addr,
7602                                 gfp_t gfp)
7603 {
7604         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7605                                   addr, gfp);
7606 }
7607
7608 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7609                                  struct net_device *netdev, const u8 *bssid,
7610                                  const u8 *req_ie, size_t req_ie_len,
7611                                  const u8 *resp_ie, size_t resp_ie_len,
7612                                  u16 status, gfp_t gfp)
7613 {
7614         struct sk_buff *msg;
7615         void *hdr;
7616
7617         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7618         if (!msg)
7619                 return;
7620
7621         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7622         if (!hdr) {
7623                 nlmsg_free(msg);
7624                 return;
7625         }
7626
7627         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7628             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7629             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7630             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7631             (req_ie &&
7632              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7633             (resp_ie &&
7634              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7635                 goto nla_put_failure;
7636
7637         genlmsg_end(msg, hdr);
7638
7639         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7640                                 nl80211_mlme_mcgrp.id, gfp);
7641         return;
7642
7643  nla_put_failure:
7644         genlmsg_cancel(msg, hdr);
7645         nlmsg_free(msg);
7646
7647 }
7648
7649 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7650                          struct net_device *netdev, const u8 *bssid,
7651                          const u8 *req_ie, size_t req_ie_len,
7652                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7653 {
7654         struct sk_buff *msg;
7655         void *hdr;
7656
7657         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7658         if (!msg)
7659                 return;
7660
7661         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7662         if (!hdr) {
7663                 nlmsg_free(msg);
7664                 return;
7665         }
7666
7667         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7668             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7669             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7670             (req_ie &&
7671              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7672             (resp_ie &&
7673              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7674                 goto nla_put_failure;
7675
7676         genlmsg_end(msg, hdr);
7677
7678         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7679                                 nl80211_mlme_mcgrp.id, gfp);
7680         return;
7681
7682  nla_put_failure:
7683         genlmsg_cancel(msg, hdr);
7684         nlmsg_free(msg);
7685
7686 }
7687
7688 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7689                                struct net_device *netdev, u16 reason,
7690                                const u8 *ie, size_t ie_len, bool from_ap)
7691 {
7692         struct sk_buff *msg;
7693         void *hdr;
7694
7695         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7696         if (!msg)
7697                 return;
7698
7699         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7700         if (!hdr) {
7701                 nlmsg_free(msg);
7702                 return;
7703         }
7704
7705         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7706             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7707             (from_ap && reason &&
7708              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7709             (from_ap &&
7710              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7711             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7712                 goto nla_put_failure;
7713
7714         genlmsg_end(msg, hdr);
7715
7716         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7717                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7718         return;
7719
7720  nla_put_failure:
7721         genlmsg_cancel(msg, hdr);
7722         nlmsg_free(msg);
7723
7724 }
7725
7726 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7727                              struct net_device *netdev, const u8 *bssid,
7728                              gfp_t gfp)
7729 {
7730         struct sk_buff *msg;
7731         void *hdr;
7732
7733         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7734         if (!msg)
7735                 return;
7736
7737         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7738         if (!hdr) {
7739                 nlmsg_free(msg);
7740                 return;
7741         }
7742
7743         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7744             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7745             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7746                 goto nla_put_failure;
7747
7748         genlmsg_end(msg, hdr);
7749
7750         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7751                                 nl80211_mlme_mcgrp.id, gfp);
7752         return;
7753
7754  nla_put_failure:
7755         genlmsg_cancel(msg, hdr);
7756         nlmsg_free(msg);
7757 }
7758
7759 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7760                 struct net_device *netdev,
7761                 const u8 *macaddr, const u8* ie, u8 ie_len,
7762                 gfp_t gfp)
7763 {
7764         struct sk_buff *msg;
7765         void *hdr;
7766
7767         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7768         if (!msg)
7769                 return;
7770
7771         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7772         if (!hdr) {
7773                 nlmsg_free(msg);
7774                 return;
7775         }
7776
7777         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7778             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7779             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7780             (ie_len && ie &&
7781              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7782                 goto nla_put_failure;
7783
7784         genlmsg_end(msg, hdr);
7785
7786         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7787                                 nl80211_mlme_mcgrp.id, gfp);
7788         return;
7789
7790  nla_put_failure:
7791         genlmsg_cancel(msg, hdr);
7792         nlmsg_free(msg);
7793 }
7794
7795 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7796                                  struct net_device *netdev, const u8 *addr,
7797                                  enum nl80211_key_type key_type, int key_id,
7798                                  const u8 *tsc, gfp_t gfp)
7799 {
7800         struct sk_buff *msg;
7801         void *hdr;
7802
7803         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7804         if (!msg)
7805                 return;
7806
7807         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7808         if (!hdr) {
7809                 nlmsg_free(msg);
7810                 return;
7811         }
7812
7813         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7814             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7815             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7816             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7817             (key_id != -1 &&
7818              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7819             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7820                 goto nla_put_failure;
7821
7822         genlmsg_end(msg, hdr);
7823
7824         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7825                                 nl80211_mlme_mcgrp.id, gfp);
7826         return;
7827
7828  nla_put_failure:
7829         genlmsg_cancel(msg, hdr);
7830         nlmsg_free(msg);
7831 }
7832
7833 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7834                                     struct ieee80211_channel *channel_before,
7835                                     struct ieee80211_channel *channel_after)
7836 {
7837         struct sk_buff *msg;
7838         void *hdr;
7839         struct nlattr *nl_freq;
7840
7841         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7842         if (!msg)
7843                 return;
7844
7845         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7846         if (!hdr) {
7847                 nlmsg_free(msg);
7848                 return;
7849         }
7850
7851         /*
7852          * Since we are applying the beacon hint to a wiphy we know its
7853          * wiphy_idx is valid
7854          */
7855         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7856                 goto nla_put_failure;
7857
7858         /* Before */
7859         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7860         if (!nl_freq)
7861                 goto nla_put_failure;
7862         if (nl80211_msg_put_channel(msg, channel_before))
7863                 goto nla_put_failure;
7864         nla_nest_end(msg, nl_freq);
7865
7866         /* After */
7867         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7868         if (!nl_freq)
7869                 goto nla_put_failure;
7870         if (nl80211_msg_put_channel(msg, channel_after))
7871                 goto nla_put_failure;
7872         nla_nest_end(msg, nl_freq);
7873
7874         genlmsg_end(msg, hdr);
7875
7876         rcu_read_lock();
7877         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7878                                 GFP_ATOMIC);
7879         rcu_read_unlock();
7880
7881         return;
7882
7883 nla_put_failure:
7884         genlmsg_cancel(msg, hdr);
7885         nlmsg_free(msg);
7886 }
7887
7888 static void nl80211_send_remain_on_chan_event(
7889         int cmd, struct cfg80211_registered_device *rdev,
7890         struct net_device *netdev, u64 cookie,
7891         struct ieee80211_channel *chan,
7892         enum nl80211_channel_type channel_type,
7893         unsigned int duration, gfp_t gfp)
7894 {
7895         struct sk_buff *msg;
7896         void *hdr;
7897
7898         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7899         if (!msg)
7900                 return;
7901
7902         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7903         if (!hdr) {
7904                 nlmsg_free(msg);
7905                 return;
7906         }
7907
7908         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7909             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7910             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7911             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7912             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7913                 goto nla_put_failure;
7914
7915         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7916             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7917                 goto nla_put_failure;
7918
7919         genlmsg_end(msg, hdr);
7920
7921         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7922                                 nl80211_mlme_mcgrp.id, gfp);
7923         return;
7924
7925  nla_put_failure:
7926         genlmsg_cancel(msg, hdr);
7927         nlmsg_free(msg);
7928 }
7929
7930 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7931                                     struct net_device *netdev, u64 cookie,
7932                                     struct ieee80211_channel *chan,
7933                                     enum nl80211_channel_type channel_type,
7934                                     unsigned int duration, gfp_t gfp)
7935 {
7936         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7937                                           rdev, netdev, cookie, chan,
7938                                           channel_type, duration, gfp);
7939 }
7940
7941 void nl80211_send_remain_on_channel_cancel(
7942         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7943         u64 cookie, struct ieee80211_channel *chan,
7944         enum nl80211_channel_type channel_type, gfp_t gfp)
7945 {
7946         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7947                                           rdev, netdev, cookie, chan,
7948                                           channel_type, 0, gfp);
7949 }
7950
7951 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7952                             struct net_device *dev, const u8 *mac_addr,
7953                             struct station_info *sinfo, gfp_t gfp)
7954 {
7955         struct sk_buff *msg;
7956
7957         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7958         if (!msg)
7959                 return;
7960
7961         if (nl80211_send_station(msg, 0, 0, 0,
7962                                  rdev, dev, mac_addr, sinfo) < 0) {
7963                 nlmsg_free(msg);
7964                 return;
7965         }
7966
7967         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7968                                 nl80211_mlme_mcgrp.id, gfp);
7969 }
7970
7971 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7972                                 struct net_device *dev, const u8 *mac_addr,
7973                                 gfp_t gfp)
7974 {
7975         struct sk_buff *msg;
7976         void *hdr;
7977
7978         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7979         if (!msg)
7980                 return;
7981
7982         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7983         if (!hdr) {
7984                 nlmsg_free(msg);
7985                 return;
7986         }
7987
7988         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7989             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
7990                 goto nla_put_failure;
7991
7992         genlmsg_end(msg, hdr);
7993
7994         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7995                                 nl80211_mlme_mcgrp.id, gfp);
7996         return;
7997
7998  nla_put_failure:
7999         genlmsg_cancel(msg, hdr);
8000         nlmsg_free(msg);
8001 }
8002
8003 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8004                                        const u8 *addr, gfp_t gfp)
8005 {
8006         struct wireless_dev *wdev = dev->ieee80211_ptr;
8007         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8008         struct sk_buff *msg;
8009         void *hdr;
8010         int err;
8011         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8012
8013         if (!nlpid)
8014                 return false;
8015
8016         msg = nlmsg_new(100, gfp);
8017         if (!msg)
8018                 return true;
8019
8020         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8021         if (!hdr) {
8022                 nlmsg_free(msg);
8023                 return true;
8024         }
8025
8026         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8027             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8028             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8029                 goto nla_put_failure;
8030
8031         err = genlmsg_end(msg, hdr);
8032         if (err < 0) {
8033                 nlmsg_free(msg);
8034                 return true;
8035         }
8036
8037         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8038         return true;
8039
8040  nla_put_failure:
8041         genlmsg_cancel(msg, hdr);
8042         nlmsg_free(msg);
8043         return true;
8044 }
8045
8046 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8047 {
8048         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8049                                           addr, gfp);
8050 }
8051
8052 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8053                                     const u8 *addr, gfp_t gfp)
8054 {
8055         return __nl80211_unexpected_frame(dev,
8056                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8057                                           addr, gfp);
8058 }
8059
8060 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8061                       struct net_device *netdev, u32 nlpid,
8062                       int freq, int sig_dbm,
8063                       const u8 *buf, size_t len, gfp_t gfp)
8064 {
8065         struct sk_buff *msg;
8066         void *hdr;
8067
8068         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8069         if (!msg)
8070                 return -ENOMEM;
8071
8072         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8073         if (!hdr) {
8074                 nlmsg_free(msg);
8075                 return -ENOMEM;
8076         }
8077
8078         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8079             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8080             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8081             (sig_dbm &&
8082              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8083             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8084                 goto nla_put_failure;
8085
8086         genlmsg_end(msg, hdr);
8087
8088         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8089
8090  nla_put_failure:
8091         genlmsg_cancel(msg, hdr);
8092         nlmsg_free(msg);
8093         return -ENOBUFS;
8094 }
8095
8096 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8097                                  struct net_device *netdev, u64 cookie,
8098                                  const u8 *buf, size_t len, bool ack,
8099                                  gfp_t gfp)
8100 {
8101         struct sk_buff *msg;
8102         void *hdr;
8103
8104         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8105         if (!msg)
8106                 return;
8107
8108         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8109         if (!hdr) {
8110                 nlmsg_free(msg);
8111                 return;
8112         }
8113
8114         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8115             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8116             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8117             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8118             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8119                 goto nla_put_failure;
8120
8121         genlmsg_end(msg, hdr);
8122
8123         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8124         return;
8125
8126  nla_put_failure:
8127         genlmsg_cancel(msg, hdr);
8128         nlmsg_free(msg);
8129 }
8130
8131 void
8132 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8133                              struct net_device *netdev,
8134                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8135                              gfp_t gfp)
8136 {
8137         struct sk_buff *msg;
8138         struct nlattr *pinfoattr;
8139         void *hdr;
8140
8141         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8142         if (!msg)
8143                 return;
8144
8145         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8146         if (!hdr) {
8147                 nlmsg_free(msg);
8148                 return;
8149         }
8150
8151         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8152             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8153                 goto nla_put_failure;
8154
8155         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8156         if (!pinfoattr)
8157                 goto nla_put_failure;
8158
8159         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8160                         rssi_event))
8161                 goto nla_put_failure;
8162
8163         nla_nest_end(msg, pinfoattr);
8164
8165         genlmsg_end(msg, hdr);
8166
8167         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8168                                 nl80211_mlme_mcgrp.id, gfp);
8169         return;
8170
8171  nla_put_failure:
8172         genlmsg_cancel(msg, hdr);
8173         nlmsg_free(msg);
8174 }
8175
8176 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8177                               struct net_device *netdev, const u8 *bssid,
8178                               const u8 *replay_ctr, gfp_t gfp)
8179 {
8180         struct sk_buff *msg;
8181         struct nlattr *rekey_attr;
8182         void *hdr;
8183
8184         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8185         if (!msg)
8186                 return;
8187
8188         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8189         if (!hdr) {
8190                 nlmsg_free(msg);
8191                 return;
8192         }
8193
8194         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8195             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8196             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8197                 goto nla_put_failure;
8198
8199         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8200         if (!rekey_attr)
8201                 goto nla_put_failure;
8202
8203         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8204                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8205                 goto nla_put_failure;
8206
8207         nla_nest_end(msg, rekey_attr);
8208
8209         genlmsg_end(msg, hdr);
8210
8211         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8212                                 nl80211_mlme_mcgrp.id, gfp);
8213         return;
8214
8215  nla_put_failure:
8216         genlmsg_cancel(msg, hdr);
8217         nlmsg_free(msg);
8218 }
8219
8220 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8221                                     struct net_device *netdev, int index,
8222                                     const u8 *bssid, bool preauth, gfp_t gfp)
8223 {
8224         struct sk_buff *msg;
8225         struct nlattr *attr;
8226         void *hdr;
8227
8228         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8229         if (!msg)
8230                 return;
8231
8232         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8233         if (!hdr) {
8234                 nlmsg_free(msg);
8235                 return;
8236         }
8237
8238         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8239             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8240                 goto nla_put_failure;
8241
8242         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8243         if (!attr)
8244                 goto nla_put_failure;
8245
8246         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8247             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8248             (preauth &&
8249              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8250                 goto nla_put_failure;
8251
8252         nla_nest_end(msg, attr);
8253
8254         genlmsg_end(msg, hdr);
8255
8256         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8257                                 nl80211_mlme_mcgrp.id, gfp);
8258         return;
8259
8260  nla_put_failure:
8261         genlmsg_cancel(msg, hdr);
8262         nlmsg_free(msg);
8263 }
8264
8265 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8266                               struct net_device *netdev, int freq,
8267                               enum nl80211_channel_type type, gfp_t gfp)
8268 {
8269         struct sk_buff *msg;
8270         void *hdr;
8271
8272         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8273         if (!msg)
8274                 return;
8275
8276         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8277         if (!hdr) {
8278                 nlmsg_free(msg);
8279                 return;
8280         }
8281
8282         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8283             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8284             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8285                 goto nla_put_failure;
8286
8287         genlmsg_end(msg, hdr);
8288
8289         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8290                                 nl80211_mlme_mcgrp.id, gfp);
8291         return;
8292
8293  nla_put_failure:
8294         genlmsg_cancel(msg, hdr);
8295         nlmsg_free(msg);
8296 }
8297
8298 void
8299 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8300                                 struct net_device *netdev, const u8 *peer,
8301                                 u32 num_packets, gfp_t gfp)
8302 {
8303         struct sk_buff *msg;
8304         struct nlattr *pinfoattr;
8305         void *hdr;
8306
8307         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8308         if (!msg)
8309                 return;
8310
8311         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8312         if (!hdr) {
8313                 nlmsg_free(msg);
8314                 return;
8315         }
8316
8317         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8318             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8319             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8320                 goto nla_put_failure;
8321
8322         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8323         if (!pinfoattr)
8324                 goto nla_put_failure;
8325
8326         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8327                 goto nla_put_failure;
8328
8329         nla_nest_end(msg, pinfoattr);
8330
8331         genlmsg_end(msg, hdr);
8332
8333         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8334                                 nl80211_mlme_mcgrp.id, gfp);
8335         return;
8336
8337  nla_put_failure:
8338         genlmsg_cancel(msg, hdr);
8339         nlmsg_free(msg);
8340 }
8341
8342 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8343                            u64 cookie, bool acked, gfp_t gfp)
8344 {
8345         struct wireless_dev *wdev = dev->ieee80211_ptr;
8346         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8347         struct sk_buff *msg;
8348         void *hdr;
8349         int err;
8350
8351         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8352         if (!msg)
8353                 return;
8354
8355         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8356         if (!hdr) {
8357                 nlmsg_free(msg);
8358                 return;
8359         }
8360
8361         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8362             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8363             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8364             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8365             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8366                 goto nla_put_failure;
8367
8368         err = genlmsg_end(msg, hdr);
8369         if (err < 0) {
8370                 nlmsg_free(msg);
8371                 return;
8372         }
8373
8374         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8375                                 nl80211_mlme_mcgrp.id, gfp);
8376         return;
8377
8378  nla_put_failure:
8379         genlmsg_cancel(msg, hdr);
8380         nlmsg_free(msg);
8381 }
8382 EXPORT_SYMBOL(cfg80211_probe_status);
8383
8384 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8385                                  const u8 *frame, size_t len,
8386                                  int freq, int sig_dbm, gfp_t gfp)
8387 {
8388         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8389         struct sk_buff *msg;
8390         void *hdr;
8391         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8392
8393         if (!nlpid)
8394                 return;
8395
8396         msg = nlmsg_new(len + 100, gfp);
8397         if (!msg)
8398                 return;
8399
8400         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8401         if (!hdr) {
8402                 nlmsg_free(msg);
8403                 return;
8404         }
8405
8406         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8407             (freq &&
8408              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8409             (sig_dbm &&
8410              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8411             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8412                 goto nla_put_failure;
8413
8414         genlmsg_end(msg, hdr);
8415
8416         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8417         return;
8418
8419  nla_put_failure:
8420         genlmsg_cancel(msg, hdr);
8421         nlmsg_free(msg);
8422 }
8423 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8424
8425 static int nl80211_netlink_notify(struct notifier_block * nb,
8426                                   unsigned long state,
8427                                   void *_notify)
8428 {
8429         struct netlink_notify *notify = _notify;
8430         struct cfg80211_registered_device *rdev;
8431         struct wireless_dev *wdev;
8432
8433         if (state != NETLINK_URELEASE)
8434                 return NOTIFY_DONE;
8435
8436         rcu_read_lock();
8437
8438         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8439                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8440                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8441                 if (rdev->ap_beacons_nlpid == notify->pid)
8442                         rdev->ap_beacons_nlpid = 0;
8443         }
8444
8445         rcu_read_unlock();
8446
8447         return NOTIFY_DONE;
8448 }
8449
8450 static struct notifier_block nl80211_netlink_notifier = {
8451         .notifier_call = nl80211_netlink_notify,
8452 };
8453
8454 /* initialisation/exit functions */
8455
8456 int nl80211_init(void)
8457 {
8458         int err;
8459
8460         err = genl_register_family_with_ops(&nl80211_fam,
8461                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8462         if (err)
8463                 return err;
8464
8465         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8466         if (err)
8467                 goto err_out;
8468
8469         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8470         if (err)
8471                 goto err_out;
8472
8473         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8474         if (err)
8475                 goto err_out;
8476
8477         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8478         if (err)
8479                 goto err_out;
8480
8481 #ifdef CONFIG_NL80211_TESTMODE
8482         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8483         if (err)
8484                 goto err_out;
8485 #endif
8486
8487         err = netlink_register_notifier(&nl80211_netlink_notifier);
8488         if (err)
8489                 goto err_out;
8490
8491         return 0;
8492  err_out:
8493         genl_unregister_family(&nl80211_fam);
8494         return err;
8495 }
8496
8497 void nl80211_exit(void)
8498 {
8499         netlink_unregister_notifier(&nl80211_netlink_notifier);
8500         genl_unregister_family(&nl80211_fam);
8501 }