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 /* policy for the attributes */
  74 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  75         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  77                                       .len = 20-1 },
  78         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  79         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  81         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  82         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  83         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  84         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  85         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  86
  87         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  88         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  89         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  90
  91         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
  92         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
  93
  94         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  95         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  96                                     .len = WLAN_MAX_KEY_LEN },
  97         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  98         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  99         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 100         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 101         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 102
 103         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 104         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 105         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 106                                        .len = IEEE80211_MAX_DATA_LEN },
 107         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 108                                        .len = IEEE80211_MAX_DATA_LEN },
 109         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 110         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 111         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 112         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 113                                                .len = NL80211_MAX_SUPP_RATES },
 114         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 115         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 116         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 117         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 118                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 119         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 120
 121         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 122         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 123
 124         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 125         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 126         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 127         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 128                                            .len = NL80211_MAX_SUPP_RATES },
 129         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 130
 131         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 132         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 133
 134         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 135
 136         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 137         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 138                               .len = IEEE80211_MAX_DATA_LEN },
 139         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 140         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 141
 142         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 143                                 .len = IEEE80211_MAX_SSID_LEN },
 144         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 145         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 146         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 147         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 149         [NL80211_ATTR_STA_FLAGS2] = {
 150                 .len = sizeof(struct nl80211_sta_flag_update),
 151         },
 152         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 153         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 154         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 155         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 156         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 157         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 158         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 159         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 160         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 161                                  .len = WLAN_PMKID_LEN },
 162         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 163         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 164         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 165         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 166                                  .len = IEEE80211_MAX_DATA_LEN },
 167         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 168         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 170         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 171         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 172         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 174         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 175         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 176         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 178         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 179         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 180         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 181         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 182         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 183         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 184         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 185         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 186         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 187                                          .len = IEEE80211_MAX_DATA_LEN },
 188         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 189                                          .len = IEEE80211_MAX_DATA_LEN },
 190         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 191         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 192         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 193         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 194         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 195         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 196         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 197         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 198         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 199         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 200                                       .len = IEEE80211_MAX_DATA_LEN },
 201         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 202         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 203         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 204                 .len = NL80211_HT_CAPABILITY_LEN
 205         },
 206         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 207         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 208         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 209 };
 210
 211 /* policy for the key attributes */
 212 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 213         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 214         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 215         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 216         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 217         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 218         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 219         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 220         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 221 };
 222
 223 /* policy for the key default flags */
 224 static const struct nla_policy
 225 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 226         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 227         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 228 };
 229
 230 /* policy for WoWLAN attributes */
 231 static const struct nla_policy
 232 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 233         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 234         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 235         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 236         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 237         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 238         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 239         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 240         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 241 };
 242
 243 /* policy for GTK rekey offload attributes */
 244 static const struct nla_policy
 245 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 246         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 247         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 248         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 249 };
 250
 251 static const struct nla_policy
 252 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 253         [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
 254                                                  .len = IEEE80211_MAX_SSID_LEN },
 255 };
 256
 257 /* ifidx get helper */
 258 static int nl80211_get_ifidx(struct netlink_callback *cb)
 259 {
 260         int res;
 261
 262         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 263                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 264                           nl80211_policy);
 265         if (res)
 266                 return res;
 267
 268         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 269                 return -EINVAL;
 270
 271         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 272         if (!res)
 273                 return -EINVAL;
 274         return res;
 275 }
 276
 277 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 278                                        struct netlink_callback *cb,
 279                                        struct cfg80211_registered_device **rdev,
 280                                        struct net_device **dev)
 281 {
 282         int ifidx = cb->args[0];
 283         int err;
 284
 285         if (!ifidx)
 286                 ifidx = nl80211_get_ifidx(cb);
 287         if (ifidx < 0)
 288                 return ifidx;
 289
 290         cb->args[0] = ifidx;
 291
 292         rtnl_lock();
 293
 294         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 295         if (!*dev) {
 296                 err = -ENODEV;
 297                 goto out_rtnl;
 298         }
 299
 300         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 301         if (IS_ERR(*rdev)) {
 302                 err = PTR_ERR(*rdev);
 303                 goto out_rtnl;
 304         }
 305
 306         return 0;
 307  out_rtnl:
 308         rtnl_unlock();
 309         return err;
 310 }
 311
 312 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 313 {
 314         cfg80211_unlock_rdev(rdev);
 315         rtnl_unlock();
 316 }
 317
 318 /* IE validation */
 319 static bool is_valid_ie_attr(const struct nlattr *attr)
 320 {
 321         const u8 *pos;
 322         int len;
 323
 324         if (!attr)
 325                 return true;
 326
 327         pos = nla_data(attr);
 328         len = nla_len(attr);
 329
 330         while (len) {
 331                 u8 elemlen;
 332
 333                 if (len < 2)
 334                         return false;
 335                 len -= 2;
 336
 337                 elemlen = pos[1];
 338                 if (elemlen > len)
 339                         return false;
 340
 341                 len -= elemlen;
 342                 pos += 2 + elemlen;
 343         }
 344
 345         return true;
 346 }
 347
 348 /* message building helper */
 349 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 350                                    int flags, u8 cmd)
 351 {
 352         /* since there is no private header just add the generic one */
 353         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 354 }
 355
 356 static int nl80211_msg_put_channel(struct sk_buff *msg,
 357                                    struct ieee80211_channel *chan)
 358 {
 359         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 360                         chan->center_freq))
 361                 goto nla_put_failure;
 362
 363         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 364             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 365                 goto nla_put_failure;
 366         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 367             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 368                 goto nla_put_failure;
 369         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 370             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 371                 goto nla_put_failure;
 372         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 373             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 374                 goto nla_put_failure;
 375
 376         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 377                         DBM_TO_MBM(chan->max_power)))
 378                 goto nla_put_failure;
 379
 380         return 0;
 381
 382  nla_put_failure:
 383         return -ENOBUFS;
 384 }
 385
 386 /* netlink command implementations */
 387
 388 struct key_parse {
 389         struct key_params p;
 390         int idx;
 391         int type;
 392         bool def, defmgmt;
 393         bool def_uni, def_multi;
 394 };
 395
 396 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 397 {
 398         struct nlattr *tb[NL80211_KEY_MAX + 1];
 399         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 400                                    nl80211_key_policy);
 401         if (err)
 402                 return err;
 403
 404         k->def = !!tb[NL80211_KEY_DEFAULT];
 405         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 406
 407         if (k->def) {
 408                 k->def_uni = true;
 409                 k->def_multi = true;
 410         }
 411         if (k->defmgmt)
 412                 k->def_multi = true;
 413
 414         if (tb[NL80211_KEY_IDX])
 415                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 416
 417         if (tb[NL80211_KEY_DATA]) {
 418                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 419                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 420         }
 421
 422         if (tb[NL80211_KEY_SEQ]) {
 423                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 424                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 425         }
 426
 427         if (tb[NL80211_KEY_CIPHER])
 428                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 429
 430         if (tb[NL80211_KEY_TYPE]) {
 431                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 432                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 433                         return -EINVAL;
 434         }
 435
 436         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 437                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 438                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 439                                        tb[NL80211_KEY_DEFAULT_TYPES],
 440                                        nl80211_key_default_policy);
 441                 if (err)
 442                         return err;
 443
 444                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 445                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 446         }
 447
 448         return 0;
 449 }
 450
 451 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 452 {
 453         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 454                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 455                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 456         }
 457
 458         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 459                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 460                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 461         }
 462
 463         if (info->attrs[NL80211_ATTR_KEY_IDX])
 464                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 465
 466         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 467                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 468
 469         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 470         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 471
 472         if (k->def) {
 473                 k->def_uni = true;
 474                 k->def_multi = true;
 475         }
 476         if (k->defmgmt)
 477                 k->def_multi = true;
 478
 479         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 480                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 481                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 482                         return -EINVAL;
 483         }
 484
 485         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 486                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 487                 int err = nla_parse_nested(
 488                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 489                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 490                                 nl80211_key_default_policy);
 491                 if (err)
 492                         return err;
 493
 494                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 495                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 496         }
 497
 498         return 0;
 499 }
 500
 501 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 502 {
 503         int err;
 504
 505         memset(k, 0, sizeof(*k));
 506         k->idx = -1;
 507         k->type = -1;
 508
 509         if (info->attrs[NL80211_ATTR_KEY])
 510                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 511         else
 512                 err = nl80211_parse_key_old(info, k);
 513
 514         if (err)
 515                 return err;
 516
 517         if (k->def && k->defmgmt)
 518                 return -EINVAL;
 519
 520         if (k->defmgmt) {
 521                 if (k->def_uni || !k->def_multi)
 522                         return -EINVAL;
 523         }
 524
 525         if (k->idx != -1) {
 526                 if (k->defmgmt) {
 527                         if (k->idx < 4 || k->idx > 5)
 528                                 return -EINVAL;
 529                 } else if (k->def) {
 530                         if (k->idx < 0 || k->idx > 3)
 531                                 return -EINVAL;
 532                 } else {
 533                         if (k->idx < 0 || k->idx > 5)
 534                                 return -EINVAL;
 535                 }
 536         }
 537
 538         return 0;
 539 }
 540
 541 static struct cfg80211_cached_keys *
 542 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 543                        struct nlattr *keys)
 544 {
 545         struct key_parse parse;
 546         struct nlattr *key;
 547         struct cfg80211_cached_keys *result;
 548         int rem, err, def = 0;
 549
 550         result = kzalloc(sizeof(*result), GFP_KERNEL);
 551         if (!result)
 552                 return ERR_PTR(-ENOMEM);
 553
 554         result->def = -1;
 555         result->defmgmt = -1;
 556
 557         nla_for_each_nested(key, keys, rem) {
 558                 memset(&parse, 0, sizeof(parse));
 559                 parse.idx = -1;
 560
 561                 err = nl80211_parse_key_new(key, &parse);
 562                 if (err)
 563                         goto error;
 564                 err = -EINVAL;
 565                 if (!parse.p.key)
 566                         goto error;
 567                 if (parse.idx < 0 || parse.idx > 4)
 568                         goto error;
 569                 if (parse.def) {
 570                         if (def)
 571                                 goto error;
 572                         def = 1;
 573                         result->def = parse.idx;
 574                         if (!parse.def_uni || !parse.def_multi)
 575                                 goto error;
 576                 } else if (parse.defmgmt)
 577                         goto error;
 578                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 579                                                      parse.idx, false, NULL);
 580                 if (err)
 581                         goto error;
 582                 result->params[parse.idx].cipher = parse.p.cipher;
 583                 result->params[parse.idx].key_len = parse.p.key_len;
 584                 result->params[parse.idx].key = result->data[parse.idx];
 585                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 586         }
 587
 588         return result;
 589  error:
 590         kfree(result);
 591         return ERR_PTR(err);
 592 }
 593
 594 static int nl80211_key_allowed(struct wireless_dev *wdev)
 595 {
 596         ASSERT_WDEV_LOCK(wdev);
 597
 598         switch (wdev->iftype) {
 599         case NL80211_IFTYPE_AP:
 600         case NL80211_IFTYPE_AP_VLAN:
 601         case NL80211_IFTYPE_P2P_GO:
 602         case NL80211_IFTYPE_MESH_POINT:
 603                 break;
 604         case NL80211_IFTYPE_ADHOC:
 605                 if (!wdev->current_bss)
 606                         return -ENOLINK;
 607                 break;
 608         case NL80211_IFTYPE_STATION:
 609         case NL80211_IFTYPE_P2P_CLIENT:
 610                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 611                         return -ENOLINK;
 612                 break;
 613         default:
 614                 return -EINVAL;
 615         }
 616
 617         return 0;
 618 }
 619
 620 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 621 {
 622         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 623         int i;
 624
 625         if (!nl_modes)
 626                 goto nla_put_failure;
 627
 628         i = 0;
 629         while (ifmodes) {
 630                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 631                         goto nla_put_failure;
 632                 ifmodes >>= 1;
 633                 i++;
 634         }
 635
 636         nla_nest_end(msg, nl_modes);
 637         return 0;
 638
 639 nla_put_failure:
 640         return -ENOBUFS;
 641 }
 642
 643 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 644                                           struct sk_buff *msg)
 645 {
 646         struct nlattr *nl_combis;
 647         int i, j;
 648
 649         nl_combis = nla_nest_start(msg,
 650                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 651         if (!nl_combis)
 652                 goto nla_put_failure;
 653
 654         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 655                 const struct ieee80211_iface_combination *c;
 656                 struct nlattr *nl_combi, *nl_limits;
 657
 658                 c = &wiphy->iface_combinations[i];
 659
 660                 nl_combi = nla_nest_start(msg, i + 1);
 661                 if (!nl_combi)
 662                         goto nla_put_failure;
 663
 664                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 665                 if (!nl_limits)
 666                         goto nla_put_failure;
 667
 668                 for (j = 0; j < c->n_limits; j++) {
 669                         struct nlattr *nl_limit;
 670
 671                         nl_limit = nla_nest_start(msg, j + 1);
 672                         if (!nl_limit)
 673                                 goto nla_put_failure;
 674                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 675                                         c->limits[j].max))
 676                                 goto nla_put_failure;
 677                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 678                                                 c->limits[j].types))
 679                                 goto nla_put_failure;
 680                         nla_nest_end(msg, nl_limit);
 681                 }
 682
 683                 nla_nest_end(msg, nl_limits);
 684
 685                 if (c->beacon_int_infra_match &&
 686                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 687                         goto nla_put_failure;
 688                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 689                                 c->num_different_channels) ||
 690                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 691                                 c->max_interfaces))
 692                         goto nla_put_failure;
 693
 694                 nla_nest_end(msg, nl_combi);
 695         }
 696
 697         nla_nest_end(msg, nl_combis);
 698
 699         return 0;
 700 nla_put_failure:
 701         return -ENOBUFS;
 702 }
 703
 704 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 705                               struct cfg80211_registered_device *dev)
 706 {
 707         void *hdr;
 708         struct nlattr *nl_bands, *nl_band;
 709         struct nlattr *nl_freqs, *nl_freq;
 710         struct nlattr *nl_rates, *nl_rate;
 711         struct nlattr *nl_cmds;
 712         enum ieee80211_band band;
 713         struct ieee80211_channel *chan;
 714         struct ieee80211_rate *rate;
 715         int i;
 716         const struct ieee80211_txrx_stypes *mgmt_stypes =
 717                                 dev->wiphy.mgmt_stypes;
 718
 719         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 720         if (!hdr)
 721                 return -1;
 722
 723         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 724             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 725             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 726                         cfg80211_rdev_list_generation) ||
 727             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 728                        dev->wiphy.retry_short) ||
 729             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 730                        dev->wiphy.retry_long) ||
 731             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 732                         dev->wiphy.frag_threshold) ||
 733             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 734                         dev->wiphy.rts_threshold) ||
 735             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 736                        dev->wiphy.coverage_class) ||
 737             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 738                        dev->wiphy.max_scan_ssids) ||
 739             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 740                        dev->wiphy.max_sched_scan_ssids) ||
 741             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 742                         dev->wiphy.max_scan_ie_len) ||
 743             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 744                         dev->wiphy.max_sched_scan_ie_len) ||
 745             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 746                        dev->wiphy.max_match_sets))
 747                 goto nla_put_failure;
 748
 749         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 750             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 751                 goto nla_put_failure;
 752         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 753             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 754                 goto nla_put_failure;
 755         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 756             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 757                 goto nla_put_failure;
 758         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 759             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 760                 goto nla_put_failure;
 761         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 762             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 763                 goto nla_put_failure;
 764         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 765             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 766                 goto nla_put_failure;
 767
 768         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 769                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 770                     dev->wiphy.cipher_suites))
 771                 goto nla_put_failure;
 772
 773         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 774                        dev->wiphy.max_num_pmkids))
 775                 goto nla_put_failure;
 776
 777         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 778             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 779                 goto nla_put_failure;
 780
 781         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 782                         dev->wiphy.available_antennas_tx) ||
 783             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 784                         dev->wiphy.available_antennas_rx))
 785                 goto nla_put_failure;
 786
 787         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 788             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 789                         dev->wiphy.probe_resp_offload))
 790                 goto nla_put_failure;
 791
 792         if ((dev->wiphy.available_antennas_tx ||
 793              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 794                 u32 tx_ant = 0, rx_ant = 0;
 795                 int res;
 796                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 797                 if (!res) {
 798                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 799                                         tx_ant) ||
 800                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 801                                         rx_ant))
 802                                 goto nla_put_failure;
 803                 }
 804         }
 805
 806         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 807                                 dev->wiphy.interface_modes))
 808                 goto nla_put_failure;
 809
 810         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 811         if (!nl_bands)
 812                 goto nla_put_failure;
 813
 814         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 815                 if (!dev->wiphy.bands[band])
 816                         continue;
 817
 818                 nl_band = nla_nest_start(msg, band);
 819                 if (!nl_band)
 820                         goto nla_put_failure;
 821
 822                 /* add HT info */
 823                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 824                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 825                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 826                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 827                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 828                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 829                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 830                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 831                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 832                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 833                         goto nla_put_failure;
 834
 835                 /* add frequencies */
 836                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 837                 if (!nl_freqs)
 838                         goto nla_put_failure;
 839
 840                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 841                         nl_freq = nla_nest_start(msg, i);
 842                         if (!nl_freq)
 843                                 goto nla_put_failure;
 844
 845                         chan = &dev->wiphy.bands[band]->channels[i];
 846
 847                         if (nl80211_msg_put_channel(msg, chan))
 848                                 goto nla_put_failure;
 849
 850                         nla_nest_end(msg, nl_freq);
 851                 }
 852
 853                 nla_nest_end(msg, nl_freqs);
 854
 855                 /* add bitrates */
 856                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 857                 if (!nl_rates)
 858                         goto nla_put_failure;
 859
 860                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 861                         nl_rate = nla_nest_start(msg, i);
 862                         if (!nl_rate)
 863                                 goto nla_put_failure;
 864
 865                         rate = &dev->wiphy.bands[band]->bitrates[i];
 866                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 867                                         rate->bitrate))
 868                                 goto nla_put_failure;
 869                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 870                             nla_put_flag(msg,
 871                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 872                                 goto nla_put_failure;
 873
 874                         nla_nest_end(msg, nl_rate);
 875                 }
 876
 877                 nla_nest_end(msg, nl_rates);
 878
 879                 nla_nest_end(msg, nl_band);
 880         }
 881         nla_nest_end(msg, nl_bands);
 882
 883         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 884         if (!nl_cmds)
 885                 goto nla_put_failure;
 886
 887         i = 0;
 888 #define CMD(op, n)                                              \
 889          do {                                                   \
 890                 if (dev->ops->op) {                             \
 891                         i++;                                    \
 892                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 893                                 goto nla_put_failure;           \
 894                 }                                               \
 895         } while (0)
 896
 897         CMD(add_virtual_intf, NEW_INTERFACE);
 898         CMD(change_virtual_intf, SET_INTERFACE);
 899         CMD(add_key, NEW_KEY);
 900         CMD(start_ap, START_AP);
 901         CMD(add_station, NEW_STATION);
 902         CMD(add_mpath, NEW_MPATH);
 903         CMD(update_mesh_config, SET_MESH_CONFIG);
 904         CMD(change_bss, SET_BSS);
 905         CMD(auth, AUTHENTICATE);
 906         CMD(assoc, ASSOCIATE);
 907         CMD(deauth, DEAUTHENTICATE);
 908         CMD(disassoc, DISASSOCIATE);
 909         CMD(join_ibss, JOIN_IBSS);
 910         CMD(join_mesh, JOIN_MESH);
 911         CMD(set_pmksa, SET_PMKSA);
 912         CMD(del_pmksa, DEL_PMKSA);
 913         CMD(flush_pmksa, FLUSH_PMKSA);
 914         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 915                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 916         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 917         CMD(mgmt_tx, FRAME);
 918         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 919         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 920                 i++;
 921                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
 922                         goto nla_put_failure;
 923         }
 924         CMD(set_channel, SET_CHANNEL);
 925         CMD(set_wds_peer, SET_WDS_PEER);
 926         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 927                 CMD(tdls_mgmt, TDLS_MGMT);
 928                 CMD(tdls_oper, TDLS_OPER);
 929         }
 930         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 931                 CMD(sched_scan_start, START_SCHED_SCAN);
 932         CMD(probe_client, PROBE_CLIENT);
 933         CMD(set_noack_map, SET_NOACK_MAP);
 934         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 935                 i++;
 936                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
 937                         goto nla_put_failure;
 938         }
 939
 940 #ifdef CONFIG_NL80211_TESTMODE
 941         CMD(testmode_cmd, TESTMODE);
 942 #endif
 943
 944 #undef CMD
 945
 946         if (dev->ops->connect || dev->ops->auth) {
 947                 i++;
 948                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
 949                         goto nla_put_failure;
 950         }
 951
 952         if (dev->ops->disconnect || dev->ops->deauth) {
 953                 i++;
 954                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
 955                         goto nla_put_failure;
 956         }
 957
 958         nla_nest_end(msg, nl_cmds);
 959
 960         if (dev->ops->remain_on_channel &&
 961             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
 962             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 963                         dev->wiphy.max_remain_on_channel_duration))
 964                 goto nla_put_failure;
 965
 966         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
 967             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
 968                 goto nla_put_failure;
 969
 970         if (mgmt_stypes) {
 971                 u16 stypes;
 972                 struct nlattr *nl_ftypes, *nl_ifs;
 973                 enum nl80211_iftype ift;
 974
 975                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 976                 if (!nl_ifs)
 977                         goto nla_put_failure;
 978
 979                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 980                         nl_ftypes = nla_nest_start(msg, ift);
 981                         if (!nl_ftypes)
 982                                 goto nla_put_failure;
 983                         i = 0;
 984                         stypes = mgmt_stypes[ift].tx;
 985                         while (stypes) {
 986                                 if ((stypes & 1) &&
 987                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
 988                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
 989                                         goto nla_put_failure;
 990                                 stypes >>= 1;
 991                                 i++;
 992                         }
 993                         nla_nest_end(msg, nl_ftypes);
 994                 }
 995
 996                 nla_nest_end(msg, nl_ifs);
 997
 998                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 999                 if (!nl_ifs)
1000                         goto nla_put_failure;
1001
1002                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1003                         nl_ftypes = nla_nest_start(msg, ift);
1004                         if (!nl_ftypes)
1005                                 goto nla_put_failure;
1006                         i = 0;
1007                         stypes = mgmt_stypes[ift].rx;
1008                         while (stypes) {
1009                                 if ((stypes & 1) &&
1010                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1011                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1012                                         goto nla_put_failure;
1013                                 stypes >>= 1;
1014                                 i++;
1015                         }
1016                         nla_nest_end(msg, nl_ftypes);
1017                 }
1018                 nla_nest_end(msg, nl_ifs);
1019         }
1020
1021         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1022                 struct nlattr *nl_wowlan;
1023
1024                 nl_wowlan = nla_nest_start(msg,
1025                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1026                 if (!nl_wowlan)
1027                         goto nla_put_failure;
1028
1029                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1030                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1031                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1032                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1033                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1034                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1035                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1036                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1037                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1038                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1039                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1040                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1041                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1042                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1043                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1044                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1045                     goto nla_put_failure;
1046                 if (dev->wiphy.wowlan.n_patterns) {
1047                         struct nl80211_wowlan_pattern_support pat = {
1048                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1049                                 .min_pattern_len =
1050                                         dev->wiphy.wowlan.pattern_min_len,
1051                                 .max_pattern_len =
1052                                         dev->wiphy.wowlan.pattern_max_len,
1053                         };
1054                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1055                                     sizeof(pat), &pat))
1056                                 goto nla_put_failure;
1057                 }
1058
1059                 nla_nest_end(msg, nl_wowlan);
1060         }
1061
1062         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1063                                 dev->wiphy.software_iftypes))
1064                 goto nla_put_failure;
1065
1066         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1067                 goto nla_put_failure;
1068
1069         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1070             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1071                         dev->wiphy.ap_sme_capa))
1072                 goto nla_put_failure;
1073
1074         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1075                         dev->wiphy.features))
1076                 goto nla_put_failure;
1077
1078         if (dev->wiphy.ht_capa_mod_mask &&
1079             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1080                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1081                     dev->wiphy.ht_capa_mod_mask))
1082                 goto nla_put_failure;
1083
1084         return genlmsg_end(msg, hdr);
1085
1086  nla_put_failure:
1087         genlmsg_cancel(msg, hdr);
1088         return -EMSGSIZE;
1089 }
1090
1091 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1092 {
1093         int idx = 0;
1094         int start = cb->args[0];
1095         struct cfg80211_registered_device *dev;
1096
1097         mutex_lock(&cfg80211_mutex);
1098         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1099                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1100                         continue;
1101                 if (++idx <= start)
1102                         continue;
1103                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1104                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1105                                        dev) < 0) {
1106                         idx--;
1107                         break;
1108                 }
1109         }
1110         mutex_unlock(&cfg80211_mutex);
1111
1112         cb->args[0] = idx;
1113
1114         return skb->len;
1115 }
1116
1117 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1118 {
1119         struct sk_buff *msg;
1120         struct cfg80211_registered_device *dev = info->user_ptr[0];
1121
1122         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1123         if (!msg)
1124                 return -ENOMEM;
1125
1126         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1127                 nlmsg_free(msg);
1128                 return -ENOBUFS;
1129         }
1130
1131         return genlmsg_reply(msg, info);
1132 }
1133
1134 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1135         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1136         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1137         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1138         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1139         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1140 };
1141
1142 static int parse_txq_params(struct nlattr *tb[],
1143                             struct ieee80211_txq_params *txq_params)
1144 {
1145         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1146             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1147             !tb[NL80211_TXQ_ATTR_AIFS])
1148                 return -EINVAL;
1149
1150         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1151         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1152         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1153         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1154         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1155
1156         if (txq_params->ac >= NL80211_NUM_ACS)
1157                 return -EINVAL;
1158
1159         return 0;
1160 }
1161
1162 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1163 {
1164         /*
1165          * You can only set the channel explicitly for AP, mesh
1166          * and WDS type interfaces; all others have their channel
1167          * managed via their respective "establish a connection"
1168          * command (connect, join, ...)
1169          *
1170          * Monitors are special as they are normally slaved to
1171          * whatever else is going on, so they behave as though
1172          * you tried setting the wiphy channel itself.
1173          */
1174         return !wdev ||
1175                 wdev->iftype == NL80211_IFTYPE_AP ||
1176                 wdev->iftype == NL80211_IFTYPE_WDS ||
1177                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1178                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1179                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1180 }
1181
1182 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1183                                  struct wireless_dev *wdev,
1184                                  struct genl_info *info)
1185 {
1186         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1187         u32 freq;
1188         int result;
1189
1190         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1191                 return -EINVAL;
1192
1193         if (!nl80211_can_set_dev_channel(wdev))
1194                 return -EOPNOTSUPP;
1195
1196         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1197                 channel_type = nla_get_u32(info->attrs[
1198                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1199                 if (channel_type != NL80211_CHAN_NO_HT &&
1200                     channel_type != NL80211_CHAN_HT20 &&
1201                     channel_type != NL80211_CHAN_HT40PLUS &&
1202                     channel_type != NL80211_CHAN_HT40MINUS)
1203                         return -EINVAL;
1204         }
1205
1206         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1207
1208         mutex_lock(&rdev->devlist_mtx);
1209         if (wdev) {
1210                 wdev_lock(wdev);
1211                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1212                 wdev_unlock(wdev);
1213         } else {
1214                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1215         }
1216         mutex_unlock(&rdev->devlist_mtx);
1217
1218         return result;
1219 }
1220
1221 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1222 {
1223         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1224         struct net_device *netdev = info->user_ptr[1];
1225
1226         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1227 }
1228
1229 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1230 {
1231         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1232         struct net_device *dev = info->user_ptr[1];
1233         struct wireless_dev *wdev = dev->ieee80211_ptr;
1234         const u8 *bssid;
1235
1236         if (!info->attrs[NL80211_ATTR_MAC])
1237                 return -EINVAL;
1238
1239         if (netif_running(dev))
1240                 return -EBUSY;
1241
1242         if (!rdev->ops->set_wds_peer)
1243                 return -EOPNOTSUPP;
1244
1245         if (wdev->iftype != NL80211_IFTYPE_WDS)
1246                 return -EOPNOTSUPP;
1247
1248         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1249         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1250 }
1251
1252
1253 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1254 {
1255         struct cfg80211_registered_device *rdev;
1256         struct net_device *netdev = NULL;
1257         struct wireless_dev *wdev;
1258         int result = 0, rem_txq_params = 0;
1259         struct nlattr *nl_txq_params;
1260         u32 changed;
1261         u8 retry_short = 0, retry_long = 0;
1262         u32 frag_threshold = 0, rts_threshold = 0;
1263         u8 coverage_class = 0;
1264
1265         /*
1266          * Try to find the wiphy and netdev. Normally this
1267          * function shouldn't need the netdev, but this is
1268          * done for backward compatibility -- previously
1269          * setting the channel was done per wiphy, but now
1270          * it is per netdev. Previous userland like hostapd
1271          * also passed a netdev to set_wiphy, so that it is
1272          * possible to let that go to the right netdev!
1273          */
1274         mutex_lock(&cfg80211_mutex);
1275
1276         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1277                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1278
1279                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1280                 if (netdev && netdev->ieee80211_ptr) {
1281                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1282                         mutex_lock(&rdev->mtx);
1283                 } else
1284                         netdev = NULL;
1285         }
1286
1287         if (!netdev) {
1288                 rdev = __cfg80211_rdev_from_info(info);
1289                 if (IS_ERR(rdev)) {
1290                         mutex_unlock(&cfg80211_mutex);
1291                         return PTR_ERR(rdev);
1292                 }
1293                 wdev = NULL;
1294                 netdev = NULL;
1295                 result = 0;
1296
1297                 mutex_lock(&rdev->mtx);
1298         } else if (netif_running(netdev) &&
1299                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1300                 wdev = netdev->ieee80211_ptr;
1301         else
1302                 wdev = NULL;
1303
1304         /*
1305          * end workaround code, by now the rdev is available
1306          * and locked, and wdev may or may not be NULL.
1307          */
1308
1309         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1310                 result = cfg80211_dev_rename(
1311                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1312
1313         mutex_unlock(&cfg80211_mutex);
1314
1315         if (result)
1316                 goto bad_res;
1317
1318         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1319                 struct ieee80211_txq_params txq_params;
1320                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1321
1322                 if (!rdev->ops->set_txq_params) {
1323                         result = -EOPNOTSUPP;
1324                         goto bad_res;
1325                 }
1326
1327                 if (!netdev) {
1328                         result = -EINVAL;
1329                         goto bad_res;
1330                 }
1331
1332                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1333                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1334                         result = -EINVAL;
1335                         goto bad_res;
1336                 }
1337
1338                 if (!netif_running(netdev)) {
1339                         result = -ENETDOWN;
1340                         goto bad_res;
1341                 }
1342
1343                 nla_for_each_nested(nl_txq_params,
1344                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1345                                     rem_txq_params) {
1346                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1347                                   nla_data(nl_txq_params),
1348                                   nla_len(nl_txq_params),
1349                                   txq_params_policy);
1350                         result = parse_txq_params(tb, &txq_params);
1351                         if (result)
1352                                 goto bad_res;
1353
1354                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1355                                                            netdev,
1356                                                            &txq_params);
1357                         if (result)
1358                                 goto bad_res;
1359                 }
1360         }
1361
1362         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1363                 result = __nl80211_set_channel(rdev, wdev, info);
1364                 if (result)
1365                         goto bad_res;
1366         }
1367
1368         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1369                 enum nl80211_tx_power_setting type;
1370                 int idx, mbm = 0;
1371
1372                 if (!rdev->ops->set_tx_power) {
1373                         result = -EOPNOTSUPP;
1374                         goto bad_res;
1375                 }
1376
1377                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1378                 type = nla_get_u32(info->attrs[idx]);
1379
1380                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1381                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1382                         result = -EINVAL;
1383                         goto bad_res;
1384                 }
1385
1386                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1387                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1388                         mbm = nla_get_u32(info->attrs[idx]);
1389                 }
1390
1391                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1392                 if (result)
1393                         goto bad_res;
1394         }
1395
1396         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1397             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1398                 u32 tx_ant, rx_ant;
1399                 if ((!rdev->wiphy.available_antennas_tx &&
1400                      !rdev->wiphy.available_antennas_rx) ||
1401                     !rdev->ops->set_antenna) {
1402                         result = -EOPNOTSUPP;
1403                         goto bad_res;
1404                 }
1405
1406                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1407                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1408
1409                 /* reject antenna configurations which don't match the
1410                  * available antenna masks, except for the "all" mask */
1411                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1412                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1413                         result = -EINVAL;
1414                         goto bad_res;
1415                 }
1416
1417                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1418                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1419
1420                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1421                 if (result)
1422                         goto bad_res;
1423         }
1424
1425         changed = 0;
1426
1427         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1428                 retry_short = nla_get_u8(
1429                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1430                 if (retry_short == 0) {
1431                         result = -EINVAL;
1432                         goto bad_res;
1433                 }
1434                 changed |= WIPHY_PARAM_RETRY_SHORT;
1435         }
1436
1437         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1438                 retry_long = nla_get_u8(
1439                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1440                 if (retry_long == 0) {
1441                         result = -EINVAL;
1442                         goto bad_res;
1443                 }
1444                 changed |= WIPHY_PARAM_RETRY_LONG;
1445         }
1446
1447         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1448                 frag_threshold = nla_get_u32(
1449                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1450                 if (frag_threshold < 256) {
1451                         result = -EINVAL;
1452                         goto bad_res;
1453                 }
1454                 if (frag_threshold != (u32) -1) {
1455                         /*
1456                          * Fragments (apart from the last one) are required to
1457                          * have even length. Make the fragmentation code
1458                          * simpler by stripping LSB should someone try to use
1459                          * odd threshold value.
1460                          */
1461                         frag_threshold &= ~0x1;
1462                 }
1463                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1464         }
1465
1466         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1467                 rts_threshold = nla_get_u32(
1468                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1469                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1470         }
1471
1472         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1473                 coverage_class = nla_get_u8(
1474                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1475                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1476         }
1477
1478         if (changed) {
1479                 u8 old_retry_short, old_retry_long;
1480                 u32 old_frag_threshold, old_rts_threshold;
1481                 u8 old_coverage_class;
1482
1483                 if (!rdev->ops->set_wiphy_params) {
1484                         result = -EOPNOTSUPP;
1485                         goto bad_res;
1486                 }
1487
1488                 old_retry_short = rdev->wiphy.retry_short;
1489                 old_retry_long = rdev->wiphy.retry_long;
1490                 old_frag_threshold = rdev->wiphy.frag_threshold;
1491                 old_rts_threshold = rdev->wiphy.rts_threshold;
1492                 old_coverage_class = rdev->wiphy.coverage_class;
1493
1494                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1495                         rdev->wiphy.retry_short = retry_short;
1496                 if (changed & WIPHY_PARAM_RETRY_LONG)
1497                         rdev->wiphy.retry_long = retry_long;
1498                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1499                         rdev->wiphy.frag_threshold = frag_threshold;
1500                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1501                         rdev->wiphy.rts_threshold = rts_threshold;
1502                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1503                         rdev->wiphy.coverage_class = coverage_class;
1504
1505                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1506                 if (result) {
1507                         rdev->wiphy.retry_short = old_retry_short;
1508                         rdev->wiphy.retry_long = old_retry_long;
1509                         rdev->wiphy.frag_threshold = old_frag_threshold;
1510                         rdev->wiphy.rts_threshold = old_rts_threshold;
1511                         rdev->wiphy.coverage_class = old_coverage_class;
1512                 }
1513         }
1514
1515  bad_res:
1516         mutex_unlock(&rdev->mtx);
1517         if (netdev)
1518                 dev_put(netdev);
1519         return result;
1520 }
1521
1522
1523 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1524                               struct cfg80211_registered_device *rdev,
1525                               struct net_device *dev)
1526 {
1527         void *hdr;
1528
1529         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1530         if (!hdr)
1531                 return -1;
1532
1533         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1534             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1535             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1536             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1537                         dev->ieee80211_ptr->iftype) ||
1538             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1539                         rdev->devlist_generation ^
1540                         (cfg80211_rdev_list_generation << 2)))
1541                 goto nla_put_failure;
1542
1543         return genlmsg_end(msg, hdr);
1544
1545  nla_put_failure:
1546         genlmsg_cancel(msg, hdr);
1547         return -EMSGSIZE;
1548 }
1549
1550 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1551 {
1552         int wp_idx = 0;
1553         int if_idx = 0;
1554         int wp_start = cb->args[0];
1555         int if_start = cb->args[1];
1556         struct cfg80211_registered_device *rdev;
1557         struct wireless_dev *wdev;
1558
1559         mutex_lock(&cfg80211_mutex);
1560         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1561                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1562                         continue;
1563                 if (wp_idx < wp_start) {
1564                         wp_idx++;
1565                         continue;
1566                 }
1567                 if_idx = 0;
1568
1569                 mutex_lock(&rdev->devlist_mtx);
1570                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1571                         if (if_idx < if_start) {
1572                                 if_idx++;
1573                                 continue;
1574                         }
1575                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1576                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1577                                                rdev, wdev->netdev) < 0) {
1578                                 mutex_unlock(&rdev->devlist_mtx);
1579                                 goto out;
1580                         }
1581                         if_idx++;
1582                 }
1583                 mutex_unlock(&rdev->devlist_mtx);
1584
1585                 wp_idx++;
1586         }
1587  out:
1588         mutex_unlock(&cfg80211_mutex);
1589
1590         cb->args[0] = wp_idx;
1591         cb->args[1] = if_idx;
1592
1593         return skb->len;
1594 }
1595
1596 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1597 {
1598         struct sk_buff *msg;
1599         struct cfg80211_registered_device *dev = info->user_ptr[0];
1600         struct net_device *netdev = info->user_ptr[1];
1601
1602         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1603         if (!msg)
1604                 return -ENOMEM;
1605
1606         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1607                                dev, netdev) < 0) {
1608                 nlmsg_free(msg);
1609                 return -ENOBUFS;
1610         }
1611
1612         return genlmsg_reply(msg, info);
1613 }
1614
1615 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1616         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1617         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1618         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1619         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1620         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1621 };
1622
1623 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1624 {
1625         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1626         int flag;
1627
1628         *mntrflags = 0;
1629
1630         if (!nla)
1631                 return -EINVAL;
1632
1633         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1634                              nla, mntr_flags_policy))
1635                 return -EINVAL;
1636
1637         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1638                 if (flags[flag])
1639                         *mntrflags |= (1<<flag);
1640
1641         return 0;
1642 }
1643
1644 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1645                                struct net_device *netdev, u8 use_4addr,
1646                                enum nl80211_iftype iftype)
1647 {
1648         if (!use_4addr) {
1649                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1650                         return -EBUSY;
1651                 return 0;
1652         }
1653
1654         switch (iftype) {
1655         case NL80211_IFTYPE_AP_VLAN:
1656                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1657                         return 0;
1658                 break;
1659         case NL80211_IFTYPE_STATION:
1660                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1661                         return 0;
1662                 break;
1663         default:
1664                 break;
1665         }
1666
1667         return -EOPNOTSUPP;
1668 }
1669
1670 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1671 {
1672         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1673         struct vif_params params;
1674         int err;
1675         enum nl80211_iftype otype, ntype;
1676         struct net_device *dev = info->user_ptr[1];
1677         u32 _flags, *flags = NULL;
1678         bool change = false;
1679
1680         memset(&params, 0, sizeof(params));
1681
1682         otype = ntype = dev->ieee80211_ptr->iftype;
1683
1684         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1685                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1686                 if (otype != ntype)
1687                         change = true;
1688                 if (ntype > NL80211_IFTYPE_MAX)
1689                         return -EINVAL;
1690         }
1691
1692         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1693                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1694
1695                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1696                         return -EINVAL;
1697                 if (netif_running(dev))
1698                         return -EBUSY;
1699
1700                 wdev_lock(wdev);
1701                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1702                              IEEE80211_MAX_MESH_ID_LEN);
1703                 wdev->mesh_id_up_len =
1704                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1705                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1706                        wdev->mesh_id_up_len);
1707                 wdev_unlock(wdev);
1708         }
1709
1710         if (info->attrs[NL80211_ATTR_4ADDR]) {
1711                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1712                 change = true;
1713                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1714                 if (err)
1715                         return err;
1716         } else {
1717                 params.use_4addr = -1;
1718         }
1719
1720         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1721                 if (ntype != NL80211_IFTYPE_MONITOR)
1722                         return -EINVAL;
1723                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1724                                           &_flags);
1725                 if (err)
1726                         return err;
1727
1728                 flags = &_flags;
1729                 change = true;
1730         }
1731
1732         if (change)
1733                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1734         else
1735                 err = 0;
1736
1737         if (!err && params.use_4addr != -1)
1738                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1739
1740         return err;
1741 }
1742
1743 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1744 {
1745         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1746         struct vif_params params;
1747         struct net_device *dev;
1748         int err;
1749         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1750         u32 flags;
1751
1752         memset(&params, 0, sizeof(params));
1753
1754         if (!info->attrs[NL80211_ATTR_IFNAME])
1755                 return -EINVAL;
1756
1757         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1758                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1759                 if (type > NL80211_IFTYPE_MAX)
1760                         return -EINVAL;
1761         }
1762
1763         if (!rdev->ops->add_virtual_intf ||
1764             !(rdev->wiphy.interface_modes & (1 << type)))
1765                 return -EOPNOTSUPP;
1766
1767         if (info->attrs[NL80211_ATTR_4ADDR]) {
1768                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1769                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1770                 if (err)
1771                         return err;
1772         }
1773
1774         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1775                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1776                                   &flags);
1777         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1778                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1779                 type, err ? NULL : &flags, &params);
1780         if (IS_ERR(dev))
1781                 return PTR_ERR(dev);
1782
1783         if (type == NL80211_IFTYPE_MESH_POINT &&
1784             info->attrs[NL80211_ATTR_MESH_ID]) {
1785                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1786
1787                 wdev_lock(wdev);
1788                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1789                              IEEE80211_MAX_MESH_ID_LEN);
1790                 wdev->mesh_id_up_len =
1791                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1792                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1793                        wdev->mesh_id_up_len);
1794                 wdev_unlock(wdev);
1795         }
1796
1797         return 0;
1798 }
1799
1800 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1801 {
1802         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1803         struct net_device *dev = info->user_ptr[1];
1804
1805         if (!rdev->ops->del_virtual_intf)
1806                 return -EOPNOTSUPP;
1807
1808         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1809 }
1810
1811 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1812 {
1813         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1814         struct net_device *dev = info->user_ptr[1];
1815         u16 noack_map;
1816
1817         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1818                 return -EINVAL;
1819
1820         if (!rdev->ops->set_noack_map)
1821                 return -EOPNOTSUPP;
1822
1823         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1824
1825         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1826 }
1827
1828 struct get_key_cookie {
1829         struct sk_buff *msg;
1830         int error;
1831         int idx;
1832 };
1833
1834 static void get_key_callback(void *c, struct key_params *params)
1835 {
1836         struct nlattr *key;
1837         struct get_key_cookie *cookie = c;
1838
1839         if ((params->key &&
1840              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1841                      params->key_len, params->key)) ||
1842             (params->seq &&
1843              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1844                      params->seq_len, params->seq)) ||
1845             (params->cipher &&
1846              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1847                          params->cipher)))
1848                 goto nla_put_failure;
1849
1850         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1851         if (!key)
1852                 goto nla_put_failure;
1853
1854         if ((params->key &&
1855              nla_put(cookie->msg, NL80211_KEY_DATA,
1856                      params->key_len, params->key)) ||
1857             (params->seq &&
1858              nla_put(cookie->msg, NL80211_KEY_SEQ,
1859                      params->seq_len, params->seq)) ||
1860             (params->cipher &&
1861              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
1862                          params->cipher)))
1863                 goto nla_put_failure;
1864
1865         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
1866                 goto nla_put_failure;
1867
1868         nla_nest_end(cookie->msg, key);
1869
1870         return;
1871  nla_put_failure:
1872         cookie->error = 1;
1873 }
1874
1875 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1876 {
1877         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1878         int err;
1879         struct net_device *dev = info->user_ptr[1];
1880         u8 key_idx = 0;
1881         const u8 *mac_addr = NULL;
1882         bool pairwise;
1883         struct get_key_cookie cookie = {
1884                 .error = 0,
1885         };
1886         void *hdr;
1887         struct sk_buff *msg;
1888
1889         if (info->attrs[NL80211_ATTR_KEY_IDX])
1890                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1891
1892         if (key_idx > 5)
1893                 return -EINVAL;
1894
1895         if (info->attrs[NL80211_ATTR_MAC])
1896                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1897
1898         pairwise = !!mac_addr;
1899         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1900                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1901                 if (kt >= NUM_NL80211_KEYTYPES)
1902                         return -EINVAL;
1903                 if (kt != NL80211_KEYTYPE_GROUP &&
1904                     kt != NL80211_KEYTYPE_PAIRWISE)
1905                         return -EINVAL;
1906                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1907         }
1908
1909         if (!rdev->ops->get_key)
1910                 return -EOPNOTSUPP;
1911
1912         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1913         if (!msg)
1914                 return -ENOMEM;
1915
1916         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1917                              NL80211_CMD_NEW_KEY);
1918         if (IS_ERR(hdr))
1919                 return PTR_ERR(hdr);
1920
1921         cookie.msg = msg;
1922         cookie.idx = key_idx;
1923
1924         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1925             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
1926                 goto nla_put_failure;
1927         if (mac_addr &&
1928             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
1929                 goto nla_put_failure;
1930
1931         if (pairwise && mac_addr &&
1932             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1933                 return -ENOENT;
1934
1935         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1936                                  mac_addr, &cookie, get_key_callback);
1937
1938         if (err)
1939                 goto free_msg;
1940
1941         if (cookie.error)
1942                 goto nla_put_failure;
1943
1944         genlmsg_end(msg, hdr);
1945         return genlmsg_reply(msg, info);
1946
1947  nla_put_failure:
1948         err = -ENOBUFS;
1949  free_msg:
1950         nlmsg_free(msg);
1951         return err;
1952 }
1953
1954 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1955 {
1956         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1957         struct key_parse key;
1958         int err;
1959         struct net_device *dev = info->user_ptr[1];
1960
1961         err = nl80211_parse_key(info, &key);
1962         if (err)
1963                 return err;
1964
1965         if (key.idx < 0)
1966                 return -EINVAL;
1967
1968         /* only support setting default key */
1969         if (!key.def && !key.defmgmt)
1970                 return -EINVAL;
1971
1972         wdev_lock(dev->ieee80211_ptr);
1973
1974         if (key.def) {
1975                 if (!rdev->ops->set_default_key) {
1976                         err = -EOPNOTSUPP;
1977                         goto out;
1978                 }
1979
1980                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1981                 if (err)
1982                         goto out;
1983
1984                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1985                                                  key.def_uni, key.def_multi);
1986
1987                 if (err)
1988                         goto out;
1989
1990 #ifdef CONFIG_CFG80211_WEXT
1991                 dev->ieee80211_ptr->wext.default_key = key.idx;
1992 #endif
1993         } else {
1994                 if (key.def_uni || !key.def_multi) {
1995                         err = -EINVAL;
1996                         goto out;
1997                 }
1998
1999                 if (!rdev->ops->set_default_mgmt_key) {
2000                         err = -EOPNOTSUPP;
2001                         goto out;
2002                 }
2003
2004                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2005                 if (err)
2006                         goto out;
2007
2008                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2009                                                       dev, key.idx);
2010                 if (err)
2011                         goto out;
2012
2013 #ifdef CONFIG_CFG80211_WEXT
2014                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2015 #endif
2016         }
2017
2018  out:
2019         wdev_unlock(dev->ieee80211_ptr);
2020
2021         return err;
2022 }
2023
2024 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2025 {
2026         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2027         int err;
2028         struct net_device *dev = info->user_ptr[1];
2029         struct key_parse key;
2030         const u8 *mac_addr = NULL;
2031
2032         err = nl80211_parse_key(info, &key);
2033         if (err)
2034                 return err;
2035
2036         if (!key.p.key)
2037                 return -EINVAL;
2038
2039         if (info->attrs[NL80211_ATTR_MAC])
2040                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2041
2042         if (key.type == -1) {
2043                 if (mac_addr)
2044                         key.type = NL80211_KEYTYPE_PAIRWISE;
2045                 else
2046                         key.type = NL80211_KEYTYPE_GROUP;
2047         }
2048
2049         /* for now */
2050         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2051             key.type != NL80211_KEYTYPE_GROUP)
2052                 return -EINVAL;
2053
2054         if (!rdev->ops->add_key)
2055                 return -EOPNOTSUPP;
2056
2057         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2058                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2059                                            mac_addr))
2060                 return -EINVAL;
2061
2062         wdev_lock(dev->ieee80211_ptr);
2063         err = nl80211_key_allowed(dev->ieee80211_ptr);
2064         if (!err)
2065                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2066                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2067                                          mac_addr, &key.p);
2068         wdev_unlock(dev->ieee80211_ptr);
2069
2070         return err;
2071 }
2072
2073 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2074 {
2075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2076         int err;
2077         struct net_device *dev = info->user_ptr[1];
2078         u8 *mac_addr = NULL;
2079         struct key_parse key;
2080
2081         err = nl80211_parse_key(info, &key);
2082         if (err)
2083                 return err;
2084
2085         if (info->attrs[NL80211_ATTR_MAC])
2086                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2087
2088         if (key.type == -1) {
2089                 if (mac_addr)
2090                         key.type = NL80211_KEYTYPE_PAIRWISE;
2091                 else
2092                         key.type = NL80211_KEYTYPE_GROUP;
2093         }
2094
2095         /* for now */
2096         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2097             key.type != NL80211_KEYTYPE_GROUP)
2098                 return -EINVAL;
2099
2100         if (!rdev->ops->del_key)
2101                 return -EOPNOTSUPP;
2102
2103         wdev_lock(dev->ieee80211_ptr);
2104         err = nl80211_key_allowed(dev->ieee80211_ptr);
2105
2106         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2107             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2108                 err = -ENOENT;
2109
2110         if (!err)
2111                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2112                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2113                                          mac_addr);
2114
2115 #ifdef CONFIG_CFG80211_WEXT
2116         if (!err) {
2117                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2118                         dev->ieee80211_ptr->wext.default_key = -1;
2119                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2120                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2121         }
2122 #endif
2123         wdev_unlock(dev->ieee80211_ptr);
2124
2125         return err;
2126 }
2127
2128 static int nl80211_parse_beacon(struct genl_info *info,
2129                                 struct cfg80211_beacon_data *bcn)
2130 {
2131         bool haveinfo = false;
2132
2133         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2134             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2135             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2136             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2137                 return -EINVAL;
2138
2139         memset(bcn, 0, sizeof(*bcn));
2140
2141         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2142                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2143                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2144                 if (!bcn->head_len)
2145                         return -EINVAL;
2146                 haveinfo = true;
2147         }
2148
2149         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2150                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2151                 bcn->tail_len =
2152                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2153                 haveinfo = true;
2154         }
2155
2156         if (!haveinfo)
2157                 return -EINVAL;
2158
2159         if (info->attrs[NL80211_ATTR_IE]) {
2160                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2161                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2162         }
2163
2164         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2165                 bcn->proberesp_ies =
2166                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2167                 bcn->proberesp_ies_len =
2168                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2169         }
2170
2171         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2172                 bcn->assocresp_ies =
2173                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2174                 bcn->assocresp_ies_len =
2175                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2176         }
2177
2178         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2179                 bcn->probe_resp =
2180                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2181                 bcn->probe_resp_len =
2182                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2183         }
2184
2185         return 0;
2186 }
2187
2188 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2189 {
2190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2191         struct net_device *dev = info->user_ptr[1];
2192         struct wireless_dev *wdev = dev->ieee80211_ptr;
2193         struct cfg80211_ap_settings params;
2194         int err;
2195
2196         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2197             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2198                 return -EOPNOTSUPP;
2199
2200         if (!rdev->ops->start_ap)
2201                 return -EOPNOTSUPP;
2202
2203         if (wdev->beacon_interval)
2204                 return -EALREADY;
2205
2206         memset(&params, 0, sizeof(params));
2207
2208         /* these are required for START_AP */
2209         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2210             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2211             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2212                 return -EINVAL;
2213
2214         err = nl80211_parse_beacon(info, &params.beacon);
2215         if (err)
2216                 return err;
2217
2218         params.beacon_interval =
2219                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2220         params.dtim_period =
2221                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2222
2223         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2224         if (err)
2225                 return err;
2226
2227         /*
2228          * In theory, some of these attributes should be required here
2229          * but since they were not used when the command was originally
2230          * added, keep them optional for old user space programs to let
2231          * them continue to work with drivers that do not need the
2232          * additional information -- drivers must check!
2233          */
2234         if (info->attrs[NL80211_ATTR_SSID]) {
2235                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2236                 params.ssid_len =
2237                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2238                 if (params.ssid_len == 0 ||
2239                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2240                         return -EINVAL;
2241         }
2242
2243         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2244                 params.hidden_ssid = nla_get_u32(
2245                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2246                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2247                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2248                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2249                         return -EINVAL;
2250         }
2251
2252         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2253
2254         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2255                 params.auth_type = nla_get_u32(
2256                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2257                 if (!nl80211_valid_auth_type(params.auth_type))
2258                         return -EINVAL;
2259         } else
2260                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2261
2262         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2263                                       NL80211_MAX_NR_CIPHER_SUITES);
2264         if (err)
2265                 return err;
2266
2267         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2268                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2269                         return -EOPNOTSUPP;
2270                 params.inactivity_timeout = nla_get_u16(
2271                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2272         }
2273
2274         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2275         if (!err)
2276                 wdev->beacon_interval = params.beacon_interval;
2277         return err;
2278 }
2279
2280 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2281 {
2282         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2283         struct net_device *dev = info->user_ptr[1];
2284         struct wireless_dev *wdev = dev->ieee80211_ptr;
2285         struct cfg80211_beacon_data params;
2286         int err;
2287
2288         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2289             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2290                 return -EOPNOTSUPP;
2291
2292         if (!rdev->ops->change_beacon)
2293                 return -EOPNOTSUPP;
2294
2295         if (!wdev->beacon_interval)
2296                 return -EINVAL;
2297
2298         err = nl80211_parse_beacon(info, &params);
2299         if (err)
2300                 return err;
2301
2302         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2303 }
2304
2305 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2306 {
2307         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2308         struct net_device *dev = info->user_ptr[1];
2309         struct wireless_dev *wdev = dev->ieee80211_ptr;
2310         int err;
2311
2312         if (!rdev->ops->stop_ap)
2313                 return -EOPNOTSUPP;
2314
2315         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2316             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2317                 return -EOPNOTSUPP;
2318
2319         if (!wdev->beacon_interval)
2320                 return -ENOENT;
2321
2322         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2323         if (!err)
2324                 wdev->beacon_interval = 0;
2325         return err;
2326 }
2327
2328 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2329         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2330         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2331         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2332         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2333         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2334         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2335 };
2336
2337 static int parse_station_flags(struct genl_info *info,
2338                                enum nl80211_iftype iftype,
2339                                struct station_parameters *params)
2340 {
2341         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2342         struct nlattr *nla;
2343         int flag;
2344
2345         /*
2346          * Try parsing the new attribute first so userspace
2347          * can specify both for older kernels.
2348          */
2349         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2350         if (nla) {
2351                 struct nl80211_sta_flag_update *sta_flags;
2352
2353                 sta_flags = nla_data(nla);
2354                 params->sta_flags_mask = sta_flags->mask;
2355                 params->sta_flags_set = sta_flags->set;
2356                 if ((params->sta_flags_mask |
2357                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2358                         return -EINVAL;
2359                 return 0;
2360         }
2361
2362         /* if present, parse the old attribute */
2363
2364         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2365         if (!nla)
2366                 return 0;
2367
2368         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2369                              nla, sta_flags_policy))
2370                 return -EINVAL;
2371
2372         /*
2373          * Only allow certain flags for interface types so that
2374          * other attributes are silently ignored. Remember that
2375          * this is backward compatibility code with old userspace
2376          * and shouldn't be hit in other cases anyway.
2377          */
2378         switch (iftype) {
2379         case NL80211_IFTYPE_AP:
2380         case NL80211_IFTYPE_AP_VLAN:
2381         case NL80211_IFTYPE_P2P_GO:
2382                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2383                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2384                                          BIT(NL80211_STA_FLAG_WME) |
2385                                          BIT(NL80211_STA_FLAG_MFP);
2386                 break;
2387         case NL80211_IFTYPE_P2P_CLIENT:
2388         case NL80211_IFTYPE_STATION:
2389                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2390                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2391                 break;
2392         case NL80211_IFTYPE_MESH_POINT:
2393                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2394                                          BIT(NL80211_STA_FLAG_MFP) |
2395                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2396         default:
2397                 return -EINVAL;
2398         }
2399
2400         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2401                 if (flags[flag])
2402                         params->sta_flags_set |= (1<<flag);
2403
2404         return 0;
2405 }
2406
2407 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2408                                  int attr)
2409 {
2410         struct nlattr *rate;
2411         u16 bitrate;
2412
2413         rate = nla_nest_start(msg, attr);
2414         if (!rate)
2415                 goto nla_put_failure;
2416
2417         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2418         bitrate = cfg80211_calculate_bitrate(info);
2419         if ((bitrate > 0 &&
2420              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2421             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2422              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2423             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2424              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2425             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2426              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2427                 goto nla_put_failure;
2428
2429         nla_nest_end(msg, rate);
2430         return true;
2431
2432 nla_put_failure:
2433         return false;
2434 }
2435
2436 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2437                                 int flags,
2438                                 struct cfg80211_registered_device *rdev,
2439                                 struct net_device *dev,
2440                                 const u8 *mac_addr, struct station_info *sinfo)
2441 {
2442         void *hdr;
2443         struct nlattr *sinfoattr, *bss_param;
2444
2445         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2446         if (!hdr)
2447                 return -1;
2448
2449         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2450             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2451             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2452                 goto nla_put_failure;
2453
2454         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2455         if (!sinfoattr)
2456                 goto nla_put_failure;
2457         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2458             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2459                         sinfo->connected_time))
2460                 goto nla_put_failure;
2461         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2462             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2463                         sinfo->inactive_time))
2464                 goto nla_put_failure;
2465         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2466             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2467                         sinfo->rx_bytes))
2468                 goto nla_put_failure;
2469         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2470             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2471                         sinfo->tx_bytes))
2472                 goto nla_put_failure;
2473         if ((sinfo->filled & STATION_INFO_LLID) &&
2474             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2475                 goto nla_put_failure;
2476         if ((sinfo->filled & STATION_INFO_PLID) &&
2477             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2478                 goto nla_put_failure;
2479         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2480             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2481                        sinfo->plink_state))
2482                 goto nla_put_failure;
2483         switch (rdev->wiphy.signal_type) {
2484         case CFG80211_SIGNAL_TYPE_MBM:
2485                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2486                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2487                                sinfo->signal))
2488                         goto nla_put_failure;
2489                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2490                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2491                                sinfo->signal_avg))
2492                         goto nla_put_failure;
2493                 break;
2494         default:
2495                 break;
2496         }
2497         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2498                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2499                                           NL80211_STA_INFO_TX_BITRATE))
2500                         goto nla_put_failure;
2501         }
2502         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2503                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2504                                           NL80211_STA_INFO_RX_BITRATE))
2505                         goto nla_put_failure;
2506         }
2507         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2508             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2509                         sinfo->rx_packets))
2510                 goto nla_put_failure;
2511         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2512             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2513                         sinfo->tx_packets))
2514                 goto nla_put_failure;
2515         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2516             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2517                         sinfo->tx_retries))
2518                 goto nla_put_failure;
2519         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2520             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2521                         sinfo->tx_failed))
2522                 goto nla_put_failure;
2523         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2524             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2525                         sinfo->beacon_loss_count))
2526                 goto nla_put_failure;
2527         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2528                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2529                 if (!bss_param)
2530                         goto nla_put_failure;
2531
2532                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2533                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2534                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2535                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2536                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2537                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2538                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2539                                sinfo->bss_param.dtim_period) ||
2540                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2541                                 sinfo->bss_param.beacon_interval))
2542                         goto nla_put_failure;
2543
2544                 nla_nest_end(msg, bss_param);
2545         }
2546         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2547             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2548                     sizeof(struct nl80211_sta_flag_update),
2549                     &sinfo->sta_flags))
2550                 goto nla_put_failure;
2551         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2552                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2553                             sinfo->t_offset))
2554                 goto nla_put_failure;
2555         nla_nest_end(msg, sinfoattr);
2556
2557         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2558             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2559                     sinfo->assoc_req_ies))
2560                 goto nla_put_failure;
2561
2562         return genlmsg_end(msg, hdr);
2563
2564  nla_put_failure:
2565         genlmsg_cancel(msg, hdr);
2566         return -EMSGSIZE;
2567 }
2568
2569 static int nl80211_dump_station(struct sk_buff *skb,
2570                                 struct netlink_callback *cb)
2571 {
2572         struct station_info sinfo;
2573         struct cfg80211_registered_device *dev;
2574         struct net_device *netdev;
2575         u8 mac_addr[ETH_ALEN];
2576         int sta_idx = cb->args[1];
2577         int err;
2578
2579         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2580         if (err)
2581                 return err;
2582
2583         if (!dev->ops->dump_station) {
2584                 err = -EOPNOTSUPP;
2585                 goto out_err;
2586         }
2587
2588         while (1) {
2589                 memset(&sinfo, 0, sizeof(sinfo));
2590                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2591                                              mac_addr, &sinfo);
2592                 if (err == -ENOENT)
2593                         break;
2594                 if (err)
2595                         goto out_err;
2596
2597                 if (nl80211_send_station(skb,
2598                                 NETLINK_CB(cb->skb).pid,
2599                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2600                                 dev, netdev, mac_addr,
2601                                 &sinfo) < 0)
2602                         goto out;
2603
2604                 sta_idx++;
2605         }
2606
2607
2608  out:
2609         cb->args[1] = sta_idx;
2610         err = skb->len;
2611  out_err:
2612         nl80211_finish_netdev_dump(dev);
2613
2614         return err;
2615 }
2616
2617 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2618 {
2619         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2620         struct net_device *dev = info->user_ptr[1];
2621         struct station_info sinfo;
2622         struct sk_buff *msg;
2623         u8 *mac_addr = NULL;
2624         int err;
2625
2626         memset(&sinfo, 0, sizeof(sinfo));
2627
2628         if (!info->attrs[NL80211_ATTR_MAC])
2629                 return -EINVAL;
2630
2631         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2632
2633         if (!rdev->ops->get_station)
2634                 return -EOPNOTSUPP;
2635
2636         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2637         if (err)
2638                 return err;
2639
2640         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2641         if (!msg)
2642                 return -ENOMEM;
2643
2644         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2645                                  rdev, dev, mac_addr, &sinfo) < 0) {
2646                 nlmsg_free(msg);
2647                 return -ENOBUFS;
2648         }
2649
2650         return genlmsg_reply(msg, info);
2651 }
2652
2653 /*
2654  * Get vlan interface making sure it is running and on the right wiphy.
2655  */
2656 static struct net_device *get_vlan(struct genl_info *info,
2657                                    struct cfg80211_registered_device *rdev)
2658 {
2659         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2660         struct net_device *v;
2661         int ret;
2662
2663         if (!vlanattr)
2664                 return NULL;
2665
2666         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2667         if (!v)
2668                 return ERR_PTR(-ENODEV);
2669
2670         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2671                 ret = -EINVAL;
2672                 goto error;
2673         }
2674
2675         if (!netif_running(v)) {
2676                 ret = -ENETDOWN;
2677                 goto error;
2678         }
2679
2680         return v;
2681  error:
2682         dev_put(v);
2683         return ERR_PTR(ret);
2684 }
2685
2686 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2687 {
2688         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2689         int err;
2690         struct net_device *dev = info->user_ptr[1];
2691         struct station_parameters params;
2692         u8 *mac_addr = NULL;
2693
2694         memset(&params, 0, sizeof(params));
2695
2696         params.listen_interval = -1;
2697         params.plink_state = -1;
2698
2699         if (info->attrs[NL80211_ATTR_STA_AID])
2700                 return -EINVAL;
2701
2702         if (!info->attrs[NL80211_ATTR_MAC])
2703                 return -EINVAL;
2704
2705         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2706
2707         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2708                 params.supported_rates =
2709                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2710                 params.supported_rates_len =
2711                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2712         }
2713
2714         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2715                 params.listen_interval =
2716                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2717
2718         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2719                 params.ht_capa =
2720                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2721
2722         if (!rdev->ops->change_station)
2723                 return -EOPNOTSUPP;
2724
2725         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2726                 return -EINVAL;
2727
2728         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2729                 params.plink_action =
2730                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2731
2732         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2733                 params.plink_state =
2734                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2735
2736         switch (dev->ieee80211_ptr->iftype) {
2737         case NL80211_IFTYPE_AP:
2738         case NL80211_IFTYPE_AP_VLAN:
2739         case NL80211_IFTYPE_P2P_GO:
2740                 /* disallow mesh-specific things */
2741                 if (params.plink_action)
2742                         return -EINVAL;
2743
2744                 /* TDLS can't be set, ... */
2745                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2746                         return -EINVAL;
2747                 /*
2748                  * ... but don't bother the driver with it. This works around
2749                  * a hostapd/wpa_supplicant issue -- it always includes the
2750                  * TLDS_PEER flag in the mask even for AP mode.
2751                  */
2752                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2753
2754                 /* accept only the listed bits */
2755                 if (params.sta_flags_mask &
2756                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2757                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2758                                   BIT(NL80211_STA_FLAG_WME) |
2759                                   BIT(NL80211_STA_FLAG_MFP)))
2760                         return -EINVAL;
2761
2762                 /* must be last in here for error handling */
2763                 params.vlan = get_vlan(info, rdev);
2764                 if (IS_ERR(params.vlan))
2765                         return PTR_ERR(params.vlan);
2766                 break;
2767         case NL80211_IFTYPE_P2P_CLIENT:
2768         case NL80211_IFTYPE_STATION:
2769                 /*
2770                  * Don't allow userspace to change the TDLS_PEER flag,
2771                  * but silently ignore attempts to change it since we
2772                  * don't have state here to verify that it doesn't try
2773                  * to change the flag.
2774                  */
2775                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2776                 /* fall through */
2777         case NL80211_IFTYPE_ADHOC:
2778                 /* disallow things sta doesn't support */
2779                 if (params.plink_action)
2780                         return -EINVAL;
2781                 if (params.ht_capa)
2782                         return -EINVAL;
2783                 if (params.listen_interval >= 0)
2784                         return -EINVAL;
2785                 /* reject any changes other than AUTHORIZED */
2786                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2787                         return -EINVAL;
2788                 break;
2789         case NL80211_IFTYPE_MESH_POINT:
2790                 /* disallow things mesh doesn't support */
2791                 if (params.vlan)
2792                         return -EINVAL;
2793                 if (params.ht_capa)
2794                         return -EINVAL;
2795                 if (params.listen_interval >= 0)
2796                         return -EINVAL;
2797                 /*
2798                  * No special handling for TDLS here -- the userspace
2799                  * mesh code doesn't have this bug.
2800                  */
2801                 if (params.sta_flags_mask &
2802                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2803                                   BIT(NL80211_STA_FLAG_MFP) |
2804                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2805                         return -EINVAL;
2806                 break;
2807         default:
2808                 return -EOPNOTSUPP;
2809         }
2810
2811         /* be aware of params.vlan when changing code here */
2812
2813         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2814
2815         if (params.vlan)
2816                 dev_put(params.vlan);
2817
2818         return err;
2819 }
2820
2821 static struct nla_policy
2822 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2823         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2824         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2825 };
2826
2827 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2828 {
2829         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2830         int err;
2831         struct net_device *dev = info->user_ptr[1];
2832         struct station_parameters params;
2833         u8 *mac_addr = NULL;
2834
2835         memset(&params, 0, sizeof(params));
2836
2837         if (!info->attrs[NL80211_ATTR_MAC])
2838                 return -EINVAL;
2839
2840         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2841                 return -EINVAL;
2842
2843         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2844                 return -EINVAL;
2845
2846         if (!info->attrs[NL80211_ATTR_STA_AID])
2847                 return -EINVAL;
2848
2849         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2850         params.supported_rates =
2851                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2852         params.supported_rates_len =
2853                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2854         params.listen_interval =
2855                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2856
2857         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2858         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2859                 return -EINVAL;
2860
2861         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2862                 params.ht_capa =
2863                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2864
2865         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2866                 params.plink_action =
2867                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2868
2869         if (!rdev->ops->add_station)
2870                 return -EOPNOTSUPP;
2871
2872         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2873                 return -EINVAL;
2874
2875         switch (dev->ieee80211_ptr->iftype) {
2876         case NL80211_IFTYPE_AP:
2877         case NL80211_IFTYPE_AP_VLAN:
2878         case NL80211_IFTYPE_P2P_GO:
2879                 /* parse WME attributes if sta is WME capable */
2880                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2881                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2882                     info->attrs[NL80211_ATTR_STA_WME]) {
2883                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2884                         struct nlattr *nla;
2885
2886                         nla = info->attrs[NL80211_ATTR_STA_WME];
2887                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2888                                                nl80211_sta_wme_policy);
2889                         if (err)
2890                                 return err;
2891
2892                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2893                                 params.uapsd_queues =
2894                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2895                         if (params.uapsd_queues &
2896                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2897                                 return -EINVAL;
2898
2899                         if (tb[NL80211_STA_WME_MAX_SP])
2900                                 params.max_sp =
2901                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2902
2903                         if (params.max_sp &
2904                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2905                                 return -EINVAL;
2906
2907                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2908                 }
2909                 /* TDLS peers cannot be added */
2910                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2911                         return -EINVAL;
2912                 /* but don't bother the driver with it */
2913                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2914
2915                 /* must be last in here for error handling */
2916                 params.vlan = get_vlan(info, rdev);
2917                 if (IS_ERR(params.vlan))
2918                         return PTR_ERR(params.vlan);
2919                 break;
2920         case NL80211_IFTYPE_MESH_POINT:
2921                 /* TDLS peers cannot be added */
2922                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2923                         return -EINVAL;
2924                 break;
2925         case NL80211_IFTYPE_STATION:
2926                 /* Only TDLS peers can be added */
2927                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2928                         return -EINVAL;
2929                 /* Can only add if TDLS ... */
2930                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2931                         return -EOPNOTSUPP;
2932                 /* ... with external setup is supported */
2933                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2934                         return -EOPNOTSUPP;
2935                 break;
2936         default:
2937                 return -EOPNOTSUPP;
2938         }
2939
2940         /* be aware of params.vlan when changing code here */
2941
2942         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2943
2944         if (params.vlan)
2945                 dev_put(params.vlan);
2946         return err;
2947 }
2948
2949 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2950 {
2951         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2952         struct net_device *dev = info->user_ptr[1];
2953         u8 *mac_addr = NULL;
2954
2955         if (info->attrs[NL80211_ATTR_MAC])
2956                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2957
2958         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2959             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2960             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2961             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2962                 return -EINVAL;
2963
2964         if (!rdev->ops->del_station)
2965                 return -EOPNOTSUPP;
2966
2967         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2968 }
2969
2970 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2971                                 int flags, struct net_device *dev,
2972                                 u8 *dst, u8 *next_hop,
2973                                 struct mpath_info *pinfo)
2974 {
2975         void *hdr;
2976         struct nlattr *pinfoattr;
2977
2978         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2979         if (!hdr)
2980                 return -1;
2981
2982         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2983             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
2984             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
2985             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
2986                 goto nla_put_failure;
2987
2988         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2989         if (!pinfoattr)
2990                 goto nla_put_failure;
2991         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
2992             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2993                         pinfo->frame_qlen))
2994                 goto nla_put_failure;
2995         if (((pinfo->filled & MPATH_INFO_SN) &&
2996              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
2997             ((pinfo->filled & MPATH_INFO_METRIC) &&
2998              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
2999                          pinfo->metric)) ||
3000             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3001              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3002                          pinfo->exptime)) ||
3003             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3004              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3005                         pinfo->flags)) ||
3006             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3007              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3008                          pinfo->discovery_timeout)) ||
3009             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3010              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3011                         pinfo->discovery_retries)))
3012                 goto nla_put_failure;
3013
3014         nla_nest_end(msg, pinfoattr);
3015
3016         return genlmsg_end(msg, hdr);
3017
3018  nla_put_failure:
3019         genlmsg_cancel(msg, hdr);
3020         return -EMSGSIZE;
3021 }
3022
3023 static int nl80211_dump_mpath(struct sk_buff *skb,
3024                               struct netlink_callback *cb)
3025 {
3026         struct mpath_info pinfo;
3027         struct cfg80211_registered_device *dev;
3028         struct net_device *netdev;
3029         u8 dst[ETH_ALEN];
3030         u8 next_hop[ETH_ALEN];
3031         int path_idx = cb->args[1];
3032         int err;
3033
3034         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3035         if (err)
3036                 return err;
3037
3038         if (!dev->ops->dump_mpath) {
3039                 err = -EOPNOTSUPP;
3040                 goto out_err;
3041         }
3042
3043         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3044                 err = -EOPNOTSUPP;
3045                 goto out_err;
3046         }
3047
3048         while (1) {
3049                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3050                                            dst, next_hop, &pinfo);
3051                 if (err == -ENOENT)
3052                         break;
3053                 if (err)
3054                         goto out_err;
3055
3056                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3057                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3058                                        netdev, dst, next_hop,
3059                                        &pinfo) < 0)
3060                         goto out;
3061
3062                 path_idx++;
3063         }
3064
3065
3066  out:
3067         cb->args[1] = path_idx;
3068         err = skb->len;
3069  out_err:
3070         nl80211_finish_netdev_dump(dev);
3071         return err;
3072 }
3073
3074 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3075 {
3076         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3077         int err;
3078         struct net_device *dev = info->user_ptr[1];
3079         struct mpath_info pinfo;
3080         struct sk_buff *msg;
3081         u8 *dst = NULL;
3082         u8 next_hop[ETH_ALEN];
3083
3084         memset(&pinfo, 0, sizeof(pinfo));
3085
3086         if (!info->attrs[NL80211_ATTR_MAC])
3087                 return -EINVAL;
3088
3089         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3090
3091         if (!rdev->ops->get_mpath)
3092                 return -EOPNOTSUPP;
3093
3094         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3095                 return -EOPNOTSUPP;
3096
3097         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3098         if (err)
3099                 return err;
3100
3101         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3102         if (!msg)
3103                 return -ENOMEM;
3104
3105         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3106                                  dev, dst, next_hop, &pinfo) < 0) {
3107                 nlmsg_free(msg);
3108                 return -ENOBUFS;
3109         }
3110
3111         return genlmsg_reply(msg, info);
3112 }
3113
3114 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3115 {
3116         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3117         struct net_device *dev = info->user_ptr[1];
3118         u8 *dst = NULL;
3119         u8 *next_hop = NULL;
3120
3121         if (!info->attrs[NL80211_ATTR_MAC])
3122                 return -EINVAL;
3123
3124         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3125                 return -EINVAL;
3126
3127         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3128         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3129
3130         if (!rdev->ops->change_mpath)
3131                 return -EOPNOTSUPP;
3132
3133         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3134                 return -EOPNOTSUPP;
3135
3136         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3137 }
3138
3139 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3140 {
3141         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3142         struct net_device *dev = info->user_ptr[1];
3143         u8 *dst = NULL;
3144         u8 *next_hop = NULL;
3145
3146         if (!info->attrs[NL80211_ATTR_MAC])
3147                 return -EINVAL;
3148
3149         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3150                 return -EINVAL;
3151
3152         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3153         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3154
3155         if (!rdev->ops->add_mpath)
3156                 return -EOPNOTSUPP;
3157
3158         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3159                 return -EOPNOTSUPP;
3160
3161         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3162 }
3163
3164 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3165 {
3166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3167         struct net_device *dev = info->user_ptr[1];
3168         u8 *dst = NULL;
3169
3170         if (info->attrs[NL80211_ATTR_MAC])
3171                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3172
3173         if (!rdev->ops->del_mpath)
3174                 return -EOPNOTSUPP;
3175
3176         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3177 }
3178
3179 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3180 {
3181         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3182         struct net_device *dev = info->user_ptr[1];
3183         struct bss_parameters params;
3184
3185         memset(&params, 0, sizeof(params));
3186         /* default to not changing parameters */
3187         params.use_cts_prot = -1;
3188         params.use_short_preamble = -1;
3189         params.use_short_slot_time = -1;
3190         params.ap_isolate = -1;
3191         params.ht_opmode = -1;
3192
3193         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3194                 params.use_cts_prot =
3195                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3196         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3197                 params.use_short_preamble =
3198                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3199         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3200                 params.use_short_slot_time =
3201                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3202         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3203                 params.basic_rates =
3204                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3205                 params.basic_rates_len =
3206                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3207         }
3208         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3209                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3210         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3211                 params.ht_opmode =
3212                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3213
3214         if (!rdev->ops->change_bss)
3215                 return -EOPNOTSUPP;
3216
3217         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3218             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3219                 return -EOPNOTSUPP;
3220
3221         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3222 }
3223
3224 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3225         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3226         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3227         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3228         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3229         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3230         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3231 };
3232
3233 static int parse_reg_rule(struct nlattr *tb[],
3234         struct ieee80211_reg_rule *reg_rule)
3235 {
3236         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3237         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3238
3239         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3240                 return -EINVAL;
3241         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3242                 return -EINVAL;
3243         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3244                 return -EINVAL;
3245         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3246                 return -EINVAL;
3247         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3248                 return -EINVAL;
3249
3250         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3251
3252         freq_range->start_freq_khz =
3253                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3254         freq_range->end_freq_khz =
3255                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3256         freq_range->max_bandwidth_khz =
3257                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3258
3259         power_rule->max_eirp =
3260                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3261
3262         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3263                 power_rule->max_antenna_gain =
3264                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3265
3266         return 0;
3267 }
3268
3269 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3270 {
3271         int r;
3272         char *data = NULL;
3273
3274         /*
3275          * You should only get this when cfg80211 hasn't yet initialized
3276          * completely when built-in to the kernel right between the time
3277          * window between nl80211_init() and regulatory_init(), if that is
3278          * even possible.
3279          */
3280         mutex_lock(&cfg80211_mutex);
3281         if (unlikely(!cfg80211_regdomain)) {
3282                 mutex_unlock(&cfg80211_mutex);
3283                 return -EINPROGRESS;
3284         }
3285         mutex_unlock(&cfg80211_mutex);
3286
3287         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3288                 return -EINVAL;
3289
3290         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3291
3292         r = regulatory_hint_user(data);
3293
3294         return r;
3295 }
3296
3297 static int nl80211_get_mesh_config(struct sk_buff *skb,
3298                                    struct genl_info *info)
3299 {
3300         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3301         struct net_device *dev = info->user_ptr[1];
3302         struct wireless_dev *wdev = dev->ieee80211_ptr;
3303         struct mesh_config cur_params;
3304         int err = 0;
3305         void *hdr;
3306         struct nlattr *pinfoattr;
3307         struct sk_buff *msg;
3308
3309         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3310                 return -EOPNOTSUPP;
3311
3312         if (!rdev->ops->get_mesh_config)
3313                 return -EOPNOTSUPP;
3314
3315         wdev_lock(wdev);
3316         /* If not connected, get default parameters */
3317         if (!wdev->mesh_id_len)
3318                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3319         else
3320                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3321                                                  &cur_params);
3322         wdev_unlock(wdev);
3323
3324         if (err)
3325                 return err;
3326
3327         /* Draw up a netlink message to send back */
3328         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3329         if (!msg)
3330                 return -ENOMEM;
3331         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3332                              NL80211_CMD_GET_MESH_CONFIG);
3333         if (!hdr)
3334                 goto out;
3335         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3336         if (!pinfoattr)
3337                 goto nla_put_failure;
3338         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3339             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3340                         cur_params.dot11MeshRetryTimeout) ||
3341             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3342                         cur_params.dot11MeshConfirmTimeout) ||
3343             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3344                         cur_params.dot11MeshHoldingTimeout) ||
3345             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3346                         cur_params.dot11MeshMaxPeerLinks) ||
3347             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3348                        cur_params.dot11MeshMaxRetries) ||
3349             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3350                        cur_params.dot11MeshTTL) ||
3351             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3352                        cur_params.element_ttl) ||
3353             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3354                        cur_params.auto_open_plinks) ||
3355             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3356                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3357             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3358                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3359             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3360                         cur_params.path_refresh_time) ||
3361             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3362                         cur_params.min_discovery_timeout) ||
3363             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3364                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3365             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3366                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3367             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3368                         cur_params.dot11MeshHWMPperrMinInterval) ||
3369             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3370                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3371             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3372                        cur_params.dot11MeshHWMPRootMode) ||
3373             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3374                         cur_params.dot11MeshHWMPRannInterval) ||
3375             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3376                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3377             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3378                        cur_params.dot11MeshForwarding) ||
3379             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3380                         cur_params.rssi_threshold))
3381                 goto nla_put_failure;
3382         nla_nest_end(msg, pinfoattr);
3383         genlmsg_end(msg, hdr);
3384         return genlmsg_reply(msg, info);
3385
3386  nla_put_failure:
3387         genlmsg_cancel(msg, hdr);
3388  out:
3389         nlmsg_free(msg);
3390         return -ENOBUFS;
3391 }
3392
3393 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3394         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3395         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3396         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3397         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3398         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3399         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3400         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3401         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3402         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3403
3404         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3405         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3406         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3407         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3408         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3409         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3410         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3411         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3412         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3413         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3414         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3415         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3416 };
3417
3418 static const struct nla_policy
3419         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3420         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3421         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3422         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3423         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3424         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3425                 .len = IEEE80211_MAX_DATA_LEN },
3426         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3427 };
3428
3429 static int nl80211_parse_mesh_config(struct genl_info *info,
3430                                      struct mesh_config *cfg,
3431                                      u32 *mask_out)
3432 {
3433         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3434         u32 mask = 0;
3435
3436 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3437 do {\
3438         if (table[attr_num]) {\
3439                 cfg->param = nla_fn(table[attr_num]); \
3440                 mask |= (1 << (attr_num - 1)); \
3441         } \
3442 } while (0);\
3443
3444
3445         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3446                 return -EINVAL;
3447         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3448                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3449                              nl80211_meshconf_params_policy))
3450                 return -EINVAL;
3451
3452         /* This makes sure that there aren't more than 32 mesh config
3453          * parameters (otherwise our bitfield scheme would not work.) */
3454         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3455
3456         /* Fill in the params struct */
3457         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3458                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3459         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3460                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3461         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3462                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3463         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3464                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3465         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3466                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3467         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3468                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3469         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3470                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3471         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3472                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3473         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
3474                         mask, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3475                         nla_get_u32);
3476         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3477                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3478                         nla_get_u8);
3479         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3480                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3481         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3482                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3483                         nla_get_u16);
3484         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3485                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3486                         nla_get_u32);
3487         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3488                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3489                         nla_get_u16);
3490         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3491                         mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3492                         nla_get_u16);
3493         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3494                         dot11MeshHWMPnetDiameterTraversalTime,
3495                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3496                         nla_get_u16);
3497         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3498                         dot11MeshHWMPRootMode, mask,
3499                         NL80211_MESHCONF_HWMP_ROOTMODE,
3500                         nla_get_u8);
3501         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3502                         dot11MeshHWMPRannInterval, mask,
3503                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3504                         nla_get_u16);
3505         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3506                         dot11MeshGateAnnouncementProtocol, mask,
3507                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3508                         nla_get_u8);
3509         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3510                         mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3511         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3512                         mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3513         if (mask_out)
3514                 *mask_out = mask;
3515
3516         return 0;
3517
3518 #undef FILL_IN_MESH_PARAM_IF_SET
3519 }
3520
3521 static int nl80211_parse_mesh_setup(struct genl_info *info,
3522                                      struct mesh_setup *setup)
3523 {
3524         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3525
3526         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3527                 return -EINVAL;
3528         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3529                              info->attrs[NL80211_ATTR_MESH_SETUP],
3530                              nl80211_mesh_setup_params_policy))
3531                 return -EINVAL;
3532
3533         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3534                 setup->sync_method =
3535                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3536                  IEEE80211_SYNC_METHOD_VENDOR :
3537                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3538
3539         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3540                 setup->path_sel_proto =
3541                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3542                  IEEE80211_PATH_PROTOCOL_VENDOR :
3543                  IEEE80211_PATH_PROTOCOL_HWMP;
3544
3545         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3546                 setup->path_metric =
3547                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3548                  IEEE80211_PATH_METRIC_VENDOR :
3549                  IEEE80211_PATH_METRIC_AIRTIME;
3550
3551
3552         if (tb[NL80211_MESH_SETUP_IE]) {
3553                 struct nlattr *ieattr =
3554                         tb[NL80211_MESH_SETUP_IE];
3555                 if (!is_valid_ie_attr(ieattr))
3556                         return -EINVAL;
3557                 setup->ie = nla_data(ieattr);
3558                 setup->ie_len = nla_len(ieattr);
3559         }
3560         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3561         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3562
3563         return 0;
3564 }
3565
3566 static int nl80211_update_mesh_config(struct sk_buff *skb,
3567                                       struct genl_info *info)
3568 {
3569         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3570         struct net_device *dev = info->user_ptr[1];
3571         struct wireless_dev *wdev = dev->ieee80211_ptr;
3572         struct mesh_config cfg;
3573         u32 mask;
3574         int err;
3575
3576         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3577                 return -EOPNOTSUPP;
3578
3579         if (!rdev->ops->update_mesh_config)
3580                 return -EOPNOTSUPP;
3581
3582         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3583         if (err)
3584                 return err;
3585
3586         wdev_lock(wdev);
3587         if (!wdev->mesh_id_len)
3588                 err = -ENOLINK;
3589
3590         if (!err)
3591                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3592                                                     mask, &cfg);
3593
3594         wdev_unlock(wdev);
3595
3596         return err;
3597 }
3598
3599 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3600 {
3601         struct sk_buff *msg;
3602         void *hdr = NULL;
3603         struct nlattr *nl_reg_rules;
3604         unsigned int i;
3605         int err = -EINVAL;
3606
3607         mutex_lock(&cfg80211_mutex);
3608
3609         if (!cfg80211_regdomain)
3610                 goto out;
3611
3612         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3613         if (!msg) {
3614                 err = -ENOBUFS;
3615                 goto out;
3616         }
3617
3618         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3619                              NL80211_CMD_GET_REG);
3620         if (!hdr)
3621                 goto put_failure;
3622
3623         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3624                            cfg80211_regdomain->alpha2) ||
3625             (cfg80211_regdomain->dfs_region &&
3626              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3627                         cfg80211_regdomain->dfs_region)))
3628                 goto nla_put_failure;
3629
3630         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3631         if (!nl_reg_rules)
3632                 goto nla_put_failure;
3633
3634         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3635                 struct nlattr *nl_reg_rule;
3636                 const struct ieee80211_reg_rule *reg_rule;
3637                 const struct ieee80211_freq_range *freq_range;
3638                 const struct ieee80211_power_rule *power_rule;
3639
3640                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3641                 freq_range = &reg_rule->freq_range;
3642                 power_rule = &reg_rule->power_rule;
3643
3644                 nl_reg_rule = nla_nest_start(msg, i);
3645                 if (!nl_reg_rule)
3646                         goto nla_put_failure;
3647
3648                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3649                                 reg_rule->flags) ||
3650                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3651                                 freq_range->start_freq_khz) ||
3652                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3653                                 freq_range->end_freq_khz) ||
3654                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3655                                 freq_range->max_bandwidth_khz) ||
3656                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3657                                 power_rule->max_antenna_gain) ||
3658                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3659                                 power_rule->max_eirp))
3660                         goto nla_put_failure;
3661
3662                 nla_nest_end(msg, nl_reg_rule);
3663         }
3664
3665         nla_nest_end(msg, nl_reg_rules);
3666
3667         genlmsg_end(msg, hdr);
3668         err = genlmsg_reply(msg, info);
3669         goto out;
3670
3671 nla_put_failure:
3672         genlmsg_cancel(msg, hdr);
3673 put_failure:
3674         nlmsg_free(msg);
3675         err = -EMSGSIZE;
3676 out:
3677         mutex_unlock(&cfg80211_mutex);
3678         return err;
3679 }
3680
3681 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3682 {
3683         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3684         struct nlattr *nl_reg_rule;
3685         char *alpha2 = NULL;
3686         int rem_reg_rules = 0, r = 0;
3687         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3688         u8 dfs_region = 0;
3689         struct ieee80211_regdomain *rd = NULL;
3690
3691         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3692                 return -EINVAL;
3693
3694         if (!info->attrs[NL80211_ATTR_REG_RULES])
3695                 return -EINVAL;
3696
3697         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3698
3699         if (info->attrs[NL80211_ATTR_DFS_REGION])
3700                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3701
3702         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3703                         rem_reg_rules) {
3704                 num_rules++;
3705                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3706                         return -EINVAL;
3707         }
3708
3709         mutex_lock(&cfg80211_mutex);
3710
3711         if (!reg_is_valid_request(alpha2)) {
3712                 r = -EINVAL;
3713                 goto bad_reg;
3714         }
3715
3716         size_of_regd = sizeof(struct ieee80211_regdomain) +
3717                 (num_rules * sizeof(struct ieee80211_reg_rule));
3718
3719         rd = kzalloc(size_of_regd, GFP_KERNEL);
3720         if (!rd) {
3721                 r = -ENOMEM;
3722                 goto bad_reg;
3723         }
3724
3725         rd->n_reg_rules = num_rules;
3726         rd->alpha2[0] = alpha2[0];
3727         rd->alpha2[1] = alpha2[1];
3728
3729         /*
3730          * Disable DFS master mode if the DFS region was
3731          * not supported or known on this kernel.
3732          */
3733         if (reg_supported_dfs_region(dfs_region))
3734                 rd->dfs_region = dfs_region;
3735
3736         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3737                         rem_reg_rules) {
3738                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3739                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3740                         reg_rule_policy);
3741                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3742                 if (r)
3743                         goto bad_reg;
3744
3745                 rule_idx++;
3746
3747                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3748                         r = -EINVAL;
3749                         goto bad_reg;
3750                 }
3751         }
3752
3753         BUG_ON(rule_idx != num_rules);
3754
3755         r = set_regdom(rd);
3756
3757         mutex_unlock(&cfg80211_mutex);
3758
3759         return r;
3760
3761  bad_reg:
3762         mutex_unlock(&cfg80211_mutex);
3763         kfree(rd);
3764         return r;
3765 }
3766
3767 static int validate_scan_freqs(struct nlattr *freqs)
3768 {
3769         struct nlattr *attr1, *attr2;
3770         int n_channels = 0, tmp1, tmp2;
3771
3772         nla_for_each_nested(attr1, freqs, tmp1) {
3773                 n_channels++;
3774                 /*
3775                  * Some hardware has a limited channel list for
3776                  * scanning, and it is pretty much nonsensical
3777                  * to scan for a channel twice, so disallow that
3778                  * and don't require drivers to check that the
3779                  * channel list they get isn't longer than what
3780                  * they can scan, as long as they can scan all
3781                  * the channels they registered at once.
3782                  */
3783                 nla_for_each_nested(attr2, freqs, tmp2)
3784                         if (attr1 != attr2 &&
3785                             nla_get_u32(attr1) == nla_get_u32(attr2))
3786                                 return 0;
3787         }
3788
3789         return n_channels;
3790 }
3791
3792 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3793 {
3794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3795         struct net_device *dev = info->user_ptr[1];
3796         struct cfg80211_scan_request *request;
3797         struct nlattr *attr;
3798         struct wiphy *wiphy;
3799         int err, tmp, n_ssids = 0, n_channels, i;
3800         size_t ie_len;
3801
3802         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3803                 return -EINVAL;
3804
3805         wiphy = &rdev->wiphy;
3806
3807         if (!rdev->ops->scan)
3808                 return -EOPNOTSUPP;
3809
3810         if (rdev->scan_req)
3811                 return -EBUSY;
3812
3813         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3814                 n_channels = validate_scan_freqs(
3815                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3816                 if (!n_channels)
3817                         return -EINVAL;
3818         } else {
3819                 enum ieee80211_band band;
3820                 n_channels = 0;
3821
3822                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3823                         if (wiphy->bands[band])
3824                                 n_channels += wiphy->bands[band]->n_channels;
3825         }
3826
3827         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3828                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3829                         n_ssids++;
3830
3831         if (n_ssids > wiphy->max_scan_ssids)
3832                 return -EINVAL;
3833
3834         if (info->attrs[NL80211_ATTR_IE])
3835                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3836         else
3837                 ie_len = 0;
3838
3839         if (ie_len > wiphy->max_scan_ie_len)
3840                 return -EINVAL;
3841
3842         request = kzalloc(sizeof(*request)
3843                         + sizeof(*request->ssids) * n_ssids
3844                         + sizeof(*request->channels) * n_channels
3845                         + ie_len, GFP_KERNEL);
3846         if (!request)
3847                 return -ENOMEM;
3848
3849         if (n_ssids)
3850                 request->ssids = (void *)&request->channels[n_channels];
3851         request->n_ssids = n_ssids;
3852         if (ie_len) {
3853                 if (request->ssids)
3854                         request->ie = (void *)(request->ssids + n_ssids);
3855                 else
3856                         request->ie = (void *)(request->channels + n_channels);
3857         }
3858
3859         i = 0;
3860         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3861                 /* user specified, bail out if channel not found */
3862                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3863                         struct ieee80211_channel *chan;
3864
3865                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3866
3867                         if (!chan) {
3868                                 err = -EINVAL;
3869                                 goto out_free;
3870                         }
3871
3872                         /* ignore disabled channels */
3873                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3874                                 continue;
3875
3876                         request->channels[i] = chan;
3877                         i++;
3878                 }
3879         } else {
3880                 enum ieee80211_band band;
3881
3882                 /* all channels */
3883                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3884                         int j;
3885                         if (!wiphy->bands[band])
3886                                 continue;
3887                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3888                                 struct ieee80211_channel *chan;
3889
3890                                 chan = &wiphy->bands[band]->channels[j];
3891
3892                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3893                                         continue;
3894
3895                                 request->channels[i] = chan;
3896                                 i++;
3897                         }
3898                 }
3899         }
3900
3901         if (!i) {
3902                 err = -EINVAL;
3903                 goto out_free;
3904         }
3905
3906         request->n_channels = i;
3907
3908         i = 0;
3909         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3910                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3911                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3912                                 err = -EINVAL;
3913                                 goto out_free;
3914                         }
3915                         request->ssids[i].ssid_len = nla_len(attr);
3916                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3917                         i++;
3918                 }
3919         }
3920
3921         if (info->attrs[NL80211_ATTR_IE]) {
3922                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3923                 memcpy((void *)request->ie,
3924                        nla_data(info->attrs[NL80211_ATTR_IE]),
3925                        request->ie_len);
3926         }
3927
3928         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3929                 if (wiphy->bands[i])
3930                         request->rates[i] =
3931                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3932
3933         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3934                 nla_for_each_nested(attr,
3935                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3936                                     tmp) {
3937                         enum ieee80211_band band = nla_type(attr);
3938
3939                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3940                                 err = -EINVAL;
3941                                 goto out_free;
3942                         }
3943                         err = ieee80211_get_ratemask(wiphy->bands[band],
3944                                                      nla_data(attr),
3945                                                      nla_len(attr),
3946                                                      &request->rates[band]);
3947                         if (err)
3948                                 goto out_free;
3949                 }
3950         }
3951
3952         request->no_cck =
3953                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3954
3955         request->dev = dev;
3956         request->wiphy = &rdev->wiphy;
3957
3958         rdev->scan_req = request;
3959         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3960
3961         if (!err) {
3962                 nl80211_send_scan_start(rdev, dev);
3963                 dev_hold(dev);
3964         } else {
3965  out_free:
3966                 rdev->scan_req = NULL;
3967                 kfree(request);
3968         }
3969
3970         return err;
3971 }
3972
3973 static int nl80211_start_sched_scan(struct sk_buff *skb,
3974                                     struct genl_info *info)
3975 {
3976         struct cfg80211_sched_scan_request *request;
3977         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3978         struct net_device *dev = info->user_ptr[1];
3979         struct nlattr *attr;
3980         struct wiphy *wiphy;
3981         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3982         u32 interval;
3983         enum ieee80211_band band;
3984         size_t ie_len;
3985         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3986
3987         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3988             !rdev->ops->sched_scan_start)
3989                 return -EOPNOTSUPP;
3990
3991         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3992                 return -EINVAL;
3993
3994         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3995                 return -EINVAL;
3996
3997         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3998         if (interval == 0)
3999                 return -EINVAL;
4000
4001         wiphy = &rdev->wiphy;
4002
4003         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4004                 n_channels = validate_scan_freqs(
4005                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4006                 if (!n_channels)
4007                         return -EINVAL;
4008         } else {
4009                 n_channels = 0;
4010
4011                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4012                         if (wiphy->bands[band])
4013                                 n_channels += wiphy->bands[band]->n_channels;
4014         }
4015
4016         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4017                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4018                                     tmp)
4019                         n_ssids++;
4020
4021         if (n_ssids > wiphy->max_sched_scan_ssids)
4022                 return -EINVAL;
4023
4024         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4025                 nla_for_each_nested(attr,
4026                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4027                                     tmp)
4028                         n_match_sets++;
4029
4030         if (n_match_sets > wiphy->max_match_sets)
4031                 return -EINVAL;
4032
4033         if (info->attrs[NL80211_ATTR_IE])
4034                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4035         else
4036                 ie_len = 0;
4037
4038         if (ie_len > wiphy->max_sched_scan_ie_len)
4039                 return -EINVAL;
4040
4041         mutex_lock(&rdev->sched_scan_mtx);
4042
4043         if (rdev->sched_scan_req) {
4044                 err = -EINPROGRESS;
4045                 goto out;
4046         }
4047
4048         request = kzalloc(sizeof(*request)
4049                         + sizeof(*request->ssids) * n_ssids
4050                         + sizeof(*request->match_sets) * n_match_sets
4051                         + sizeof(*request->channels) * n_channels
4052                         + ie_len, GFP_KERNEL);
4053         if (!request) {
4054                 err = -ENOMEM;
4055                 goto out;
4056         }
4057
4058         if (n_ssids)
4059                 request->ssids = (void *)&request->channels[n_channels];
4060         request->n_ssids = n_ssids;
4061         if (ie_len) {
4062                 if (request->ssids)
4063                         request->ie = (void *)(request->ssids + n_ssids);
4064                 else
4065                         request->ie = (void *)(request->channels + n_channels);
4066         }
4067
4068         if (n_match_sets) {
4069                 if (request->ie)
4070                         request->match_sets = (void *)(request->ie + ie_len);
4071                 else if (request->ssids)
4072                         request->match_sets =
4073                                 (void *)(request->ssids + n_ssids);
4074                 else
4075                         request->match_sets =
4076                                 (void *)(request->channels + n_channels);
4077         }
4078         request->n_match_sets = n_match_sets;
4079
4080         i = 0;
4081         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4082                 /* user specified, bail out if channel not found */
4083                 nla_for_each_nested(attr,
4084                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4085                                     tmp) {
4086                         struct ieee80211_channel *chan;
4087
4088                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4089
4090                         if (!chan) {
4091                                 err = -EINVAL;
4092                                 goto out_free;
4093                         }
4094
4095                         /* ignore disabled channels */
4096                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4097                                 continue;
4098
4099                         request->channels[i] = chan;
4100                         i++;
4101                 }
4102         } else {
4103                 /* all channels */
4104                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4105                         int j;
4106                         if (!wiphy->bands[band])
4107                                 continue;
4108                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4109                                 struct ieee80211_channel *chan;
4110
4111                                 chan = &wiphy->bands[band]->channels[j];
4112
4113                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4114                                         continue;
4115
4116                                 request->channels[i] = chan;
4117                                 i++;
4118                         }
4119                 }
4120         }
4121
4122         if (!i) {
4123                 err = -EINVAL;
4124                 goto out_free;
4125         }
4126
4127         request->n_channels = i;
4128
4129         i = 0;
4130         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4131                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4132                                     tmp) {
4133                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4134                                 err = -EINVAL;
4135                                 goto out_free;
4136                         }
4137                         request->ssids[i].ssid_len = nla_len(attr);
4138                         memcpy(request->ssids[i].ssid, nla_data(attr),
4139                                nla_len(attr));
4140                         i++;
4141                 }
4142         }
4143
4144         i = 0;
4145         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4146                 nla_for_each_nested(attr,
4147                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4148                                     tmp) {
4149                         struct nlattr *ssid;
4150
4151                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4152                                   nla_data(attr), nla_len(attr),
4153                                   nl80211_match_policy);
4154                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4155                         if (ssid) {
4156                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4157                                         err = -EINVAL;
4158                                         goto out_free;
4159                                 }
4160                                 memcpy(request->match_sets[i].ssid.ssid,
4161                                        nla_data(ssid), nla_len(ssid));
4162                                 request->match_sets[i].ssid.ssid_len =
4163                                         nla_len(ssid);
4164                         }
4165                         i++;
4166                 }
4167         }
4168
4169         if (info->attrs[NL80211_ATTR_IE]) {
4170                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4171                 memcpy((void *)request->ie,
4172                        nla_data(info->attrs[NL80211_ATTR_IE]),
4173                        request->ie_len);
4174         }
4175
4176         request->dev = dev;
4177         request->wiphy = &rdev->wiphy;
4178         request->interval = interval;
4179
4180         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4181         if (!err) {
4182                 rdev->sched_scan_req = request;
4183                 nl80211_send_sched_scan(rdev, dev,
4184                                         NL80211_CMD_START_SCHED_SCAN);
4185                 goto out;
4186         }
4187
4188 out_free:
4189         kfree(request);
4190 out:
4191         mutex_unlock(&rdev->sched_scan_mtx);
4192         return err;
4193 }
4194
4195 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4196                                    struct genl_info *info)
4197 {
4198         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4199         int err;
4200
4201         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4202             !rdev->ops->sched_scan_stop)
4203                 return -EOPNOTSUPP;
4204
4205         mutex_lock(&rdev->sched_scan_mtx);
4206         err = __cfg80211_stop_sched_scan(rdev, false);
4207         mutex_unlock(&rdev->sched_scan_mtx);
4208
4209         return err;
4210 }
4211
4212 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4213                             u32 seq, int flags,
4214                             struct cfg80211_registered_device *rdev,
4215                             struct wireless_dev *wdev,
4216                             struct cfg80211_internal_bss *intbss)
4217 {
4218         struct cfg80211_bss *res = &intbss->pub;
4219         void *hdr;
4220         struct nlattr *bss;
4221
4222         ASSERT_WDEV_LOCK(wdev);
4223
4224         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4225                              NL80211_CMD_NEW_SCAN_RESULTS);
4226         if (!hdr)
4227                 return -1;
4228
4229         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4230
4231         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4232             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4233                 goto nla_put_failure;
4234
4235         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4236         if (!bss)
4237                 goto nla_put_failure;
4238         if ((!is_zero_ether_addr(res->bssid) &&
4239              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4240             (res->information_elements && res->len_information_elements &&
4241              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4242                      res->len_information_elements,
4243                      res->information_elements)) ||
4244             (res->beacon_ies && res->len_beacon_ies &&
4245              res->beacon_ies != res->information_elements &&
4246              nla_put(msg, NL80211_BSS_BEACON_IES,
4247                      res->len_beacon_ies, res->beacon_ies)))
4248                 goto nla_put_failure;
4249         if (res->tsf &&
4250             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4251                 goto nla_put_failure;
4252         if (res->beacon_interval &&
4253             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4254                 goto nla_put_failure;
4255         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4256             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4257             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4258                         jiffies_to_msecs(jiffies - intbss->ts)))
4259                 goto nla_put_failure;
4260
4261         switch (rdev->wiphy.signal_type) {
4262         case CFG80211_SIGNAL_TYPE_MBM:
4263                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4264                         goto nla_put_failure;
4265                 break;
4266         case CFG80211_SIGNAL_TYPE_UNSPEC:
4267                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4268                         goto nla_put_failure;
4269                 break;
4270         default:
4271                 break;
4272         }
4273
4274         switch (wdev->iftype) {
4275         case NL80211_IFTYPE_P2P_CLIENT:
4276         case NL80211_IFTYPE_STATION:
4277                 if (intbss == wdev->current_bss &&
4278                     nla_put_u32(msg, NL80211_BSS_STATUS,
4279                                 NL80211_BSS_STATUS_ASSOCIATED))
4280                         goto nla_put_failure;
4281                 break;
4282         case NL80211_IFTYPE_ADHOC:
4283                 if (intbss == wdev->current_bss &&
4284                     nla_put_u32(msg, NL80211_BSS_STATUS,
4285                                 NL80211_BSS_STATUS_IBSS_JOINED))
4286                         goto nla_put_failure;
4287                 break;
4288         default:
4289                 break;
4290         }
4291
4292         nla_nest_end(msg, bss);
4293
4294         return genlmsg_end(msg, hdr);
4295
4296  nla_put_failure:
4297         genlmsg_cancel(msg, hdr);
4298         return -EMSGSIZE;
4299 }
4300
4301 static int nl80211_dump_scan(struct sk_buff *skb,
4302                              struct netlink_callback *cb)
4303 {
4304         struct cfg80211_registered_device *rdev;
4305         struct net_device *dev;
4306         struct cfg80211_internal_bss *scan;
4307         struct wireless_dev *wdev;
4308         int start = cb->args[1], idx = 0;
4309         int err;
4310
4311         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4312         if (err)
4313                 return err;
4314
4315         wdev = dev->ieee80211_ptr;
4316
4317         wdev_lock(wdev);
4318         spin_lock_bh(&rdev->bss_lock);
4319         cfg80211_bss_expire(rdev);
4320
4321         cb->seq = rdev->bss_generation;
4322
4323         list_for_each_entry(scan, &rdev->bss_list, list) {
4324                 if (++idx <= start)
4325                         continue;
4326                 if (nl80211_send_bss(skb, cb,
4327                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4328                                 rdev, wdev, scan) < 0) {
4329                         idx--;
4330                         break;
4331                 }
4332         }
4333
4334         spin_unlock_bh(&rdev->bss_lock);
4335         wdev_unlock(wdev);
4336
4337         cb->args[1] = idx;
4338         nl80211_finish_netdev_dump(rdev);
4339
4340         return skb->len;
4341 }
4342
4343 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4344                                 int flags, struct net_device *dev,
4345                                 struct survey_info *survey)
4346 {
4347         void *hdr;
4348         struct nlattr *infoattr;
4349
4350         hdr = nl80211hdr_put(msg, pid, seq, flags,
4351                              NL80211_CMD_NEW_SURVEY_RESULTS);
4352         if (!hdr)
4353                 return -ENOMEM;
4354
4355         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4356                 goto nla_put_failure;
4357
4358         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4359         if (!infoattr)
4360                 goto nla_put_failure;
4361
4362         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4363                         survey->channel->center_freq))
4364                 goto nla_put_failure;
4365
4366         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4367             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4368                 goto nla_put_failure;
4369         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4370             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4371                 goto nla_put_failure;
4372         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4373             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4374                         survey->channel_time))
4375                 goto nla_put_failure;
4376         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4377             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4378                         survey->channel_time_busy))
4379                 goto nla_put_failure;
4380         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4381             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4382                         survey->channel_time_ext_busy))
4383                 goto nla_put_failure;
4384         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4385             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4386                         survey->channel_time_rx))
4387                 goto nla_put_failure;
4388         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4389             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4390                         survey->channel_time_tx))
4391                 goto nla_put_failure;
4392
4393         nla_nest_end(msg, infoattr);
4394
4395         return genlmsg_end(msg, hdr);
4396
4397  nla_put_failure:
4398         genlmsg_cancel(msg, hdr);
4399         return -EMSGSIZE;
4400 }
4401
4402 static int nl80211_dump_survey(struct sk_buff *skb,
4403                         struct netlink_callback *cb)
4404 {
4405         struct survey_info survey;
4406         struct cfg80211_registered_device *dev;
4407         struct net_device *netdev;
4408         int survey_idx = cb->args[1];
4409         int res;
4410
4411         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4412         if (res)
4413                 return res;
4414
4415         if (!dev->ops->dump_survey) {
4416                 res = -EOPNOTSUPP;
4417                 goto out_err;
4418         }
4419
4420         while (1) {
4421                 struct ieee80211_channel *chan;
4422
4423                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4424                                             &survey);
4425                 if (res == -ENOENT)
4426                         break;
4427                 if (res)
4428                         goto out_err;
4429
4430                 /* Survey without a channel doesn't make sense */
4431                 if (!survey.channel) {
4432                         res = -EINVAL;
4433                         goto out;
4434                 }
4435
4436                 chan = ieee80211_get_channel(&dev->wiphy,
4437                                              survey.channel->center_freq);
4438                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4439                         survey_idx++;
4440                         continue;
4441                 }
4442
4443                 if (nl80211_send_survey(skb,
4444                                 NETLINK_CB(cb->skb).pid,
4445                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4446                                 netdev,
4447                                 &survey) < 0)
4448                         goto out;
4449                 survey_idx++;
4450         }
4451
4452  out:
4453         cb->args[1] = survey_idx;
4454         res = skb->len;
4455  out_err:
4456         nl80211_finish_netdev_dump(dev);
4457         return res;
4458 }
4459
4460 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4461 {
4462         return auth_type <= NL80211_AUTHTYPE_MAX;
4463 }
4464
4465 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4466 {
4467         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4468                                   NL80211_WPA_VERSION_2));
4469 }
4470
4471 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4472 {
4473         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4474         struct net_device *dev = info->user_ptr[1];
4475         struct ieee80211_channel *chan;
4476         const u8 *bssid, *ssid, *ie = NULL;
4477         int err, ssid_len, ie_len = 0;
4478         enum nl80211_auth_type auth_type;
4479         struct key_parse key;
4480         bool local_state_change;
4481
4482         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4483                 return -EINVAL;
4484
4485         if (!info->attrs[NL80211_ATTR_MAC])
4486                 return -EINVAL;
4487
4488         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4489                 return -EINVAL;
4490
4491         if (!info->attrs[NL80211_ATTR_SSID])
4492                 return -EINVAL;
4493
4494         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4495                 return -EINVAL;
4496
4497         err = nl80211_parse_key(info, &key);
4498         if (err)
4499                 return err;
4500
4501         if (key.idx >= 0) {
4502                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4503                         return -EINVAL;
4504                 if (!key.p.key || !key.p.key_len)
4505                         return -EINVAL;
4506                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4507                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4508                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4509                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4510                         return -EINVAL;
4511                 if (key.idx > 4)
4512                         return -EINVAL;
4513         } else {
4514                 key.p.key_len = 0;
4515                 key.p.key = NULL;
4516         }
4517
4518         if (key.idx >= 0) {
4519                 int i;
4520                 bool ok = false;
4521                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4522                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4523                                 ok = true;
4524                                 break;
4525                         }
4526                 }
4527                 if (!ok)
4528                         return -EINVAL;
4529         }
4530
4531         if (!rdev->ops->auth)
4532                 return -EOPNOTSUPP;
4533
4534         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4535             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4536                 return -EOPNOTSUPP;
4537
4538         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4539         chan = ieee80211_get_channel(&rdev->wiphy,
4540                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4541         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4542                 return -EINVAL;
4543
4544         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4545         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4546
4547         if (info->attrs[NL80211_ATTR_IE]) {
4548                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4549                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4550         }
4551
4552         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4553         if (!nl80211_valid_auth_type(auth_type))
4554                 return -EINVAL;
4555
4556         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4557
4558         /*
4559          * Since we no longer track auth state, ignore
4560          * requests to only change local state.
4561          */
4562         if (local_state_change)
4563                 return 0;
4564
4565         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4566                                   ssid, ssid_len, ie, ie_len,
4567                                   key.p.key, key.p.key_len, key.idx);
4568 }
4569
4570 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4571                                    struct genl_info *info,
4572                                    struct cfg80211_crypto_settings *settings,
4573                                    int cipher_limit)
4574 {
4575         memset(settings, 0, sizeof(*settings));
4576
4577         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4578
4579         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4580                 u16 proto;
4581                 proto = nla_get_u16(
4582                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4583                 settings->control_port_ethertype = cpu_to_be16(proto);
4584                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4585                     proto != ETH_P_PAE)
4586                         return -EINVAL;
4587                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4588                         settings->control_port_no_encrypt = true;
4589         } else
4590                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4591
4592         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4593                 void *data;
4594                 int len, i;
4595
4596                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4597                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4598                 settings->n_ciphers_pairwise = len / sizeof(u32);
4599
4600                 if (len % sizeof(u32))
4601                         return -EINVAL;
4602
4603                 if (settings->n_ciphers_pairwise > cipher_limit)
4604                         return -EINVAL;
4605
4606                 memcpy(settings->ciphers_pairwise, data, len);
4607
4608                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4609                         if (!cfg80211_supported_cipher_suite(
4610                                         &rdev->wiphy,
4611                                         settings->ciphers_pairwise[i]))
4612                                 return -EINVAL;
4613         }
4614
4615         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4616                 settings->cipher_group =
4617                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4618                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4619                                                      settings->cipher_group))
4620                         return -EINVAL;
4621         }
4622
4623         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4624                 settings->wpa_versions =
4625                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4626                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4627                         return -EINVAL;
4628         }
4629
4630         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4631                 void *data;
4632                 int len;
4633
4634                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4635                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4636                 settings->n_akm_suites = len / sizeof(u32);
4637
4638                 if (len % sizeof(u32))
4639                         return -EINVAL;
4640
4641                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4642                         return -EINVAL;
4643
4644                 memcpy(settings->akm_suites, data, len);
4645         }
4646
4647         return 0;
4648 }
4649
4650 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4651 {
4652         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4653         struct net_device *dev = info->user_ptr[1];
4654         struct cfg80211_crypto_settings crypto;
4655         struct ieee80211_channel *chan;
4656         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4657         int err, ssid_len, ie_len = 0;
4658         bool use_mfp = false;
4659         u32 flags = 0;
4660         struct ieee80211_ht_cap *ht_capa = NULL;
4661         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4662
4663         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4664                 return -EINVAL;
4665
4666         if (!info->attrs[NL80211_ATTR_MAC] ||
4667             !info->attrs[NL80211_ATTR_SSID] ||
4668             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4669                 return -EINVAL;
4670
4671         if (!rdev->ops->assoc)
4672                 return -EOPNOTSUPP;
4673
4674         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4675             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4676                 return -EOPNOTSUPP;
4677
4678         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4679
4680         chan = ieee80211_get_channel(&rdev->wiphy,
4681                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4682         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4683                 return -EINVAL;
4684
4685         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4686         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4687
4688         if (info->attrs[NL80211_ATTR_IE]) {
4689                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4690                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4691         }
4692
4693         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4694                 enum nl80211_mfp mfp =
4695                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4696                 if (mfp == NL80211_MFP_REQUIRED)
4697                         use_mfp = true;
4698                 else if (mfp != NL80211_MFP_NO)
4699                         return -EINVAL;
4700         }
4701
4702         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4703                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4704
4705         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4706                 flags |= ASSOC_REQ_DISABLE_HT;
4707
4708         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4709                 ht_capa_mask =
4710                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4711
4712         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4713                 if (!ht_capa_mask)
4714                         return -EINVAL;
4715                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4716         }
4717
4718         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4719         if (!err)
4720                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4721                                           ssid, ssid_len, ie, ie_len, use_mfp,
4722                                           &crypto, flags, ht_capa,
4723                                           ht_capa_mask);
4724
4725         return err;
4726 }
4727
4728 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4729 {
4730         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4731         struct net_device *dev = info->user_ptr[1];
4732         const u8 *ie = NULL, *bssid;
4733         int ie_len = 0;
4734         u16 reason_code;
4735         bool local_state_change;
4736
4737         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4738                 return -EINVAL;
4739
4740         if (!info->attrs[NL80211_ATTR_MAC])
4741                 return -EINVAL;
4742
4743         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4744                 return -EINVAL;
4745
4746         if (!rdev->ops->deauth)
4747                 return -EOPNOTSUPP;
4748
4749         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4750             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4751                 return -EOPNOTSUPP;
4752
4753         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4754
4755         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4756         if (reason_code == 0) {
4757                 /* Reason Code 0 is reserved */
4758                 return -EINVAL;
4759         }
4760
4761         if (info->attrs[NL80211_ATTR_IE]) {
4762                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4763                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4764         }
4765
4766         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4767
4768         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4769                                     local_state_change);
4770 }
4771
4772 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4773 {
4774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4775         struct net_device *dev = info->user_ptr[1];
4776         const u8 *ie = NULL, *bssid;
4777         int ie_len = 0;
4778         u16 reason_code;
4779         bool local_state_change;
4780
4781         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4782                 return -EINVAL;
4783
4784         if (!info->attrs[NL80211_ATTR_MAC])
4785                 return -EINVAL;
4786
4787         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4788                 return -EINVAL;
4789
4790         if (!rdev->ops->disassoc)
4791                 return -EOPNOTSUPP;
4792
4793         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4794             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4795                 return -EOPNOTSUPP;
4796
4797         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4798
4799         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4800         if (reason_code == 0) {
4801                 /* Reason Code 0 is reserved */
4802                 return -EINVAL;
4803         }
4804
4805         if (info->attrs[NL80211_ATTR_IE]) {
4806                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4807                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4808         }
4809
4810         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4811
4812         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4813                                       local_state_change);
4814 }
4815
4816 static bool
4817 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4818                          int mcast_rate[IEEE80211_NUM_BANDS],
4819                          int rateval)
4820 {
4821         struct wiphy *wiphy = &rdev->wiphy;
4822         bool found = false;
4823         int band, i;
4824
4825         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4826                 struct ieee80211_supported_band *sband;
4827
4828                 sband = wiphy->bands[band];
4829                 if (!sband)
4830                         continue;
4831
4832                 for (i = 0; i < sband->n_bitrates; i++) {
4833                         if (sband->bitrates[i].bitrate == rateval) {
4834                                 mcast_rate[band] = i + 1;
4835                                 found = true;
4836                                 break;
4837                         }
4838                 }
4839         }
4840
4841         return found;
4842 }
4843
4844 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4845 {
4846         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4847         struct net_device *dev = info->user_ptr[1];
4848         struct cfg80211_ibss_params ibss;
4849         struct wiphy *wiphy;
4850         struct cfg80211_cached_keys *connkeys = NULL;
4851         int err;
4852
4853         memset(&ibss, 0, sizeof(ibss));
4854
4855         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4856                 return -EINVAL;
4857
4858         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4859             !info->attrs[NL80211_ATTR_SSID] ||
4860             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4861                 return -EINVAL;
4862
4863         ibss.beacon_interval = 100;
4864
4865         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4866                 ibss.beacon_interval =
4867                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4868                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4869                         return -EINVAL;
4870         }
4871
4872         if (!rdev->ops->join_ibss)
4873                 return -EOPNOTSUPP;
4874
4875         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4876                 return -EOPNOTSUPP;
4877
4878         wiphy = &rdev->wiphy;
4879
4880         if (info->attrs[NL80211_ATTR_MAC]) {
4881                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4882
4883                 if (!is_valid_ether_addr(ibss.bssid))
4884                         return -EINVAL;
4885         }
4886         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4887         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4888
4889         if (info->attrs[NL80211_ATTR_IE]) {
4890                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4891                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4892         }
4893
4894         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4895                 enum nl80211_channel_type channel_type;
4896
4897                 channel_type = nla_get_u32(
4898                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4899                 if (channel_type != NL80211_CHAN_NO_HT &&
4900                     channel_type != NL80211_CHAN_HT20 &&
4901                     channel_type != NL80211_CHAN_HT40MINUS &&
4902                     channel_type != NL80211_CHAN_HT40PLUS)
4903                         return -EINVAL;
4904
4905                 if (channel_type != NL80211_CHAN_NO_HT &&
4906                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4907                         return -EINVAL;
4908
4909                 ibss.channel_type = channel_type;
4910         } else {
4911                 ibss.channel_type = NL80211_CHAN_NO_HT;
4912         }
4913
4914         ibss.channel = rdev_freq_to_chan(rdev,
4915                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4916                 ibss.channel_type);
4917         if (!ibss.channel ||
4918             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4919             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4920                 return -EINVAL;
4921
4922         /* Both channels should be able to initiate communication */
4923         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4924              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4925             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4926                                           ibss.channel_type))
4927                 return -EINVAL;
4928
4929         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4930         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4931
4932         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4933                 u8 *rates =
4934                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4935                 int n_rates =
4936                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4937                 struct ieee80211_supported_band *sband =
4938                         wiphy->bands[ibss.channel->band];
4939
4940                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4941                                              &ibss.basic_rates);
4942                 if (err)
4943                         return err;
4944         }
4945
4946         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4947             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4948                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4949                 return -EINVAL;
4950
4951         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4952                 connkeys = nl80211_parse_connkeys(rdev,
4953                                         info->attrs[NL80211_ATTR_KEYS]);
4954                 if (IS_ERR(connkeys))
4955                         return PTR_ERR(connkeys);
4956         }
4957
4958         ibss.control_port =
4959                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4960
4961         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4962         if (err)
4963                 kfree(connkeys);
4964         return err;
4965 }
4966
4967 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4968 {
4969         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4970         struct net_device *dev = info->user_ptr[1];
4971
4972         if (!rdev->ops->leave_ibss)
4973                 return -EOPNOTSUPP;
4974
4975         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4976                 return -EOPNOTSUPP;
4977
4978         return cfg80211_leave_ibss(rdev, dev, false);
4979 }
4980
4981 #ifdef CONFIG_NL80211_TESTMODE
4982 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4983         .name = "testmode",
4984 };
4985
4986 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4987 {
4988         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4989         int err;
4990
4991         if (!info->attrs[NL80211_ATTR_TESTDATA])
4992                 return -EINVAL;
4993
4994         err = -EOPNOTSUPP;
4995         if (rdev->ops->testmode_cmd) {
4996                 rdev->testmode_info = info;
4997                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4998                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4999                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5000                 rdev->testmode_info = NULL;
5001         }
5002
5003         return err;
5004 }
5005
5006 static int nl80211_testmode_dump(struct sk_buff *skb,
5007                                  struct netlink_callback *cb)
5008 {
5009         struct cfg80211_registered_device *rdev;
5010         int err;
5011         long phy_idx;
5012         void *data = NULL;
5013         int data_len = 0;
5014
5015         if (cb->args[0]) {
5016                 /*
5017                  * 0 is a valid index, but not valid for args[0],
5018                  * so we need to offset by 1.
5019                  */
5020                 phy_idx = cb->args[0] - 1;
5021         } else {
5022                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5023                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5024                                   nl80211_policy);
5025                 if (err)
5026                         return err;
5027                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
5028                         phy_idx = nla_get_u32(
5029                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
5030                 } else {
5031                         struct net_device *netdev;
5032
5033                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
5034                                                       nl80211_fam.attrbuf,
5035                                                       &rdev, &netdev);
5036                         if (err)
5037                                 return err;
5038                         dev_put(netdev);
5039                         phy_idx = rdev->wiphy_idx;
5040                         cfg80211_unlock_rdev(rdev);
5041                 }
5042                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5043                         cb->args[1] =
5044                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5045         }
5046
5047         if (cb->args[1]) {
5048                 data = nla_data((void *)cb->args[1]);
5049                 data_len = nla_len((void *)cb->args[1]);
5050         }
5051
5052         mutex_lock(&cfg80211_mutex);
5053         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5054         if (!rdev) {
5055                 mutex_unlock(&cfg80211_mutex);
5056                 return -ENOENT;
5057         }
5058         cfg80211_lock_rdev(rdev);
5059         mutex_unlock(&cfg80211_mutex);
5060
5061         if (!rdev->ops->testmode_dump) {
5062                 err = -EOPNOTSUPP;
5063                 goto out_err;
5064         }
5065
5066         while (1) {
5067                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5068                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5069                                            NL80211_CMD_TESTMODE);
5070                 struct nlattr *tmdata;
5071
5072                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5073                         genlmsg_cancel(skb, hdr);
5074                         break;
5075                 }
5076
5077                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5078                 if (!tmdata) {
5079                         genlmsg_cancel(skb, hdr);
5080                         break;
5081                 }
5082                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5083                                                data, data_len);
5084                 nla_nest_end(skb, tmdata);
5085
5086                 if (err == -ENOBUFS || err == -ENOENT) {
5087                         genlmsg_cancel(skb, hdr);
5088                         break;
5089                 } else if (err) {
5090                         genlmsg_cancel(skb, hdr);
5091                         goto out_err;
5092                 }
5093
5094                 genlmsg_end(skb, hdr);
5095         }
5096
5097         err = skb->len;
5098         /* see above */
5099         cb->args[0] = phy_idx + 1;
5100  out_err:
5101         cfg80211_unlock_rdev(rdev);
5102         return err;
5103 }
5104
5105 static struct sk_buff *
5106 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5107                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5108 {
5109         struct sk_buff *skb;
5110         void *hdr;
5111         struct nlattr *data;
5112
5113         skb = nlmsg_new(approxlen + 100, gfp);
5114         if (!skb)
5115                 return NULL;
5116
5117         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5118         if (!hdr) {
5119                 kfree_skb(skb);
5120                 return NULL;
5121         }
5122
5123         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5124                 goto nla_put_failure;
5125         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5126
5127         ((void **)skb->cb)[0] = rdev;
5128         ((void **)skb->cb)[1] = hdr;
5129         ((void **)skb->cb)[2] = data;
5130
5131         return skb;
5132
5133  nla_put_failure:
5134         kfree_skb(skb);
5135         return NULL;
5136 }
5137
5138 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5139                                                   int approxlen)
5140 {
5141         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5142
5143         if (WARN_ON(!rdev->testmode_info))
5144                 return NULL;
5145
5146         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5147                                 rdev->testmode_info->snd_pid,
5148                                 rdev->testmode_info->snd_seq,
5149                                 GFP_KERNEL);
5150 }
5151 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5152
5153 int cfg80211_testmode_reply(struct sk_buff *skb)
5154 {
5155         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5156         void *hdr = ((void **)skb->cb)[1];
5157         struct nlattr *data = ((void **)skb->cb)[2];
5158
5159         if (WARN_ON(!rdev->testmode_info)) {
5160                 kfree_skb(skb);
5161                 return -EINVAL;
5162         }
5163
5164         nla_nest_end(skb, data);
5165         genlmsg_end(skb, hdr);
5166         return genlmsg_reply(skb, rdev->testmode_info);
5167 }
5168 EXPORT_SYMBOL(cfg80211_testmode_reply);
5169
5170 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5171                                                   int approxlen, gfp_t gfp)
5172 {
5173         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5174
5175         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5176 }
5177 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5178
5179 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5180 {
5181         void *hdr = ((void **)skb->cb)[1];
5182         struct nlattr *data = ((void **)skb->cb)[2];
5183
5184         nla_nest_end(skb, data);
5185         genlmsg_end(skb, hdr);
5186         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5187 }
5188 EXPORT_SYMBOL(cfg80211_testmode_event);
5189 #endif
5190
5191 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5192 {
5193         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5194         struct net_device *dev = info->user_ptr[1];
5195         struct cfg80211_connect_params connect;
5196         struct wiphy *wiphy;
5197         struct cfg80211_cached_keys *connkeys = NULL;
5198         int err;
5199
5200         memset(&connect, 0, sizeof(connect));
5201
5202         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5203                 return -EINVAL;
5204
5205         if (!info->attrs[NL80211_ATTR_SSID] ||
5206             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5207                 return -EINVAL;
5208
5209         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5210                 connect.auth_type =
5211                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5212                 if (!nl80211_valid_auth_type(connect.auth_type))
5213                         return -EINVAL;
5214         } else
5215                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5216
5217         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5218
5219         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5220                                       NL80211_MAX_NR_CIPHER_SUITES);
5221         if (err)
5222                 return err;
5223
5224         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5225             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5226                 return -EOPNOTSUPP;
5227
5228         wiphy = &rdev->wiphy;
5229
5230         connect.bg_scan_period = -1;
5231         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5232                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5233                 connect.bg_scan_period =
5234                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5235         }
5236
5237         if (info->attrs[NL80211_ATTR_MAC])
5238                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5239         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5240         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5241
5242         if (info->attrs[NL80211_ATTR_IE]) {
5243                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5244                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5245         }
5246
5247         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5248                 connect.channel =
5249                         ieee80211_get_channel(wiphy,
5250                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5251                 if (!connect.channel ||
5252                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5253                         return -EINVAL;
5254         }
5255
5256         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5257                 connkeys = nl80211_parse_connkeys(rdev,
5258                                         info->attrs[NL80211_ATTR_KEYS]);
5259                 if (IS_ERR(connkeys))
5260                         return PTR_ERR(connkeys);
5261         }
5262
5263         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5264                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5265
5266         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5267                 memcpy(&connect.ht_capa_mask,
5268                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5269                        sizeof(connect.ht_capa_mask));
5270
5271         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5272                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5273                         return -EINVAL;
5274                 memcpy(&connect.ht_capa,
5275                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5276                        sizeof(connect.ht_capa));
5277         }
5278
5279         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5280         if (err)
5281                 kfree(connkeys);
5282         return err;
5283 }
5284
5285 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5286 {
5287         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5288         struct net_device *dev = info->user_ptr[1];
5289         u16 reason;
5290
5291         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5292                 reason = WLAN_REASON_DEAUTH_LEAVING;
5293         else
5294                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5295
5296         if (reason == 0)
5297                 return -EINVAL;
5298
5299         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5300             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5301                 return -EOPNOTSUPP;
5302
5303         return cfg80211_disconnect(rdev, dev, reason, true);
5304 }
5305
5306 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5307 {
5308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5309         struct net *net;
5310         int err;
5311         u32 pid;
5312
5313         if (!info->attrs[NL80211_ATTR_PID])
5314                 return -EINVAL;
5315
5316         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5317
5318         net = get_net_ns_by_pid(pid);
5319         if (IS_ERR(net))
5320                 return PTR_ERR(net);
5321
5322         err = 0;
5323
5324         /* check if anything to do */
5325         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5326                 err = cfg80211_switch_netns(rdev, net);
5327
5328         put_net(net);
5329         return err;
5330 }
5331
5332 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5333 {
5334         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5335         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5336                         struct cfg80211_pmksa *pmksa) = NULL;
5337         struct net_device *dev = info->user_ptr[1];
5338         struct cfg80211_pmksa pmksa;
5339
5340         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5341
5342         if (!info->attrs[NL80211_ATTR_MAC])
5343                 return -EINVAL;
5344
5345         if (!info->attrs[NL80211_ATTR_PMKID])
5346                 return -EINVAL;
5347
5348         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5349         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5350
5351         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5352             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5353                 return -EOPNOTSUPP;
5354
5355         switch (info->genlhdr->cmd) {
5356         case NL80211_CMD_SET_PMKSA:
5357                 rdev_ops = rdev->ops->set_pmksa;
5358                 break;
5359         case NL80211_CMD_DEL_PMKSA:
5360                 rdev_ops = rdev->ops->del_pmksa;
5361                 break;
5362         default:
5363                 WARN_ON(1);
5364                 break;
5365         }
5366
5367         if (!rdev_ops)
5368                 return -EOPNOTSUPP;
5369
5370         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5371 }
5372
5373 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5374 {
5375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5376         struct net_device *dev = info->user_ptr[1];
5377
5378         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5379             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5380                 return -EOPNOTSUPP;
5381
5382         if (!rdev->ops->flush_pmksa)
5383                 return -EOPNOTSUPP;
5384
5385         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5386 }
5387
5388 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5389 {
5390         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5391         struct net_device *dev = info->user_ptr[1];
5392         u8 action_code, dialog_token;
5393         u16 status_code;
5394         u8 *peer;
5395
5396         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5397             !rdev->ops->tdls_mgmt)
5398                 return -EOPNOTSUPP;
5399
5400         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5401             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5402             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5403             !info->attrs[NL80211_ATTR_IE] ||
5404             !info->attrs[NL80211_ATTR_MAC])
5405                 return -EINVAL;
5406
5407         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5408         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5409         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5410         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5411
5412         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5413                                     dialog_token, status_code,
5414                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5415                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5416 }
5417
5418 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5419 {
5420         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5421         struct net_device *dev = info->user_ptr[1];
5422         enum nl80211_tdls_operation operation;
5423         u8 *peer;
5424
5425         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5426             !rdev->ops->tdls_oper)
5427                 return -EOPNOTSUPP;
5428
5429         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5430             !info->attrs[NL80211_ATTR_MAC])
5431                 return -EINVAL;
5432
5433         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5434         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5435
5436         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5437 }
5438
5439 static int nl80211_remain_on_channel(struct sk_buff *skb,
5440                                      struct genl_info *info)
5441 {
5442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5443         struct net_device *dev = info->user_ptr[1];
5444         struct ieee80211_channel *chan;
5445         struct sk_buff *msg;
5446         void *hdr;
5447         u64 cookie;
5448         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5449         u32 freq, duration;
5450         int err;
5451
5452         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5453             !info->attrs[NL80211_ATTR_DURATION])
5454                 return -EINVAL;
5455
5456         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5457
5458         /*
5459          * We should be on that channel for at least one jiffie,
5460          * and more than 5 seconds seems excessive.
5461          */
5462         if (!duration || !msecs_to_jiffies(duration) ||
5463             duration > rdev->wiphy.max_remain_on_channel_duration)
5464                 return -EINVAL;
5465
5466         if (!rdev->ops->remain_on_channel ||
5467             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5468                 return -EOPNOTSUPP;
5469
5470         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5471                 channel_type = nla_get_u32(
5472                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5473                 if (channel_type != NL80211_CHAN_NO_HT &&
5474                     channel_type != NL80211_CHAN_HT20 &&
5475                     channel_type != NL80211_CHAN_HT40PLUS &&
5476                     channel_type != NL80211_CHAN_HT40MINUS)
5477                         return -EINVAL;
5478         }
5479
5480         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5481         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5482         if (chan == NULL)
5483                 return -EINVAL;
5484
5485         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5486         if (!msg)
5487                 return -ENOMEM;
5488
5489         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5490                              NL80211_CMD_REMAIN_ON_CHANNEL);
5491
5492         if (IS_ERR(hdr)) {
5493                 err = PTR_ERR(hdr);
5494                 goto free_msg;
5495         }
5496
5497         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5498                                            channel_type, duration, &cookie);
5499
5500         if (err)
5501                 goto free_msg;
5502
5503         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5504                 goto nla_put_failure;
5505
5506         genlmsg_end(msg, hdr);
5507
5508         return genlmsg_reply(msg, info);
5509
5510  nla_put_failure:
5511         err = -ENOBUFS;
5512  free_msg:
5513         nlmsg_free(msg);
5514         return err;
5515 }
5516
5517 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5518                                             struct genl_info *info)
5519 {
5520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5521         struct net_device *dev = info->user_ptr[1];
5522         u64 cookie;
5523
5524         if (!info->attrs[NL80211_ATTR_COOKIE])
5525                 return -EINVAL;
5526
5527         if (!rdev->ops->cancel_remain_on_channel)
5528                 return -EOPNOTSUPP;
5529
5530         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5531
5532         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5533 }
5534
5535 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5536                            u8 *rates, u8 rates_len)
5537 {
5538         u8 i;
5539         u32 mask = 0;
5540
5541         for (i = 0; i < rates_len; i++) {
5542                 int rate = (rates[i] & 0x7f) * 5;
5543                 int ridx;
5544                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5545                         struct ieee80211_rate *srate =
5546                                 &sband->bitrates[ridx];
5547                         if (rate == srate->bitrate) {
5548                                 mask |= 1 << ridx;
5549                                 break;
5550                         }
5551                 }
5552                 if (ridx == sband->n_bitrates)
5553                         return 0; /* rate not found */
5554         }
5555
5556         return mask;
5557 }
5558
5559 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5560                                u8 *rates, u8 rates_len,
5561                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5562 {
5563         u8 i;
5564
5565         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5566
5567         for (i = 0; i < rates_len; i++) {
5568                 int ridx, rbit;
5569
5570                 ridx = rates[i] / 8;
5571                 rbit = BIT(rates[i] % 8);
5572
5573                 /* check validity */
5574                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5575                         return false;
5576
5577                 /* check availability */
5578                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5579                         mcs[ridx] |= rbit;
5580                 else
5581                         return false;
5582         }
5583
5584         return true;
5585 }
5586
5587 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5588         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5589                                     .len = NL80211_MAX_SUPP_RATES },
5590         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5591                                  .len = NL80211_MAX_SUPP_HT_RATES },
5592 };
5593
5594 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5595                                        struct genl_info *info)
5596 {
5597         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5598         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5599         struct cfg80211_bitrate_mask mask;
5600         int rem, i;
5601         struct net_device *dev = info->user_ptr[1];
5602         struct nlattr *tx_rates;
5603         struct ieee80211_supported_band *sband;
5604
5605         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5606                 return -EINVAL;
5607
5608         if (!rdev->ops->set_bitrate_mask)
5609                 return -EOPNOTSUPP;
5610
5611         memset(&mask, 0, sizeof(mask));
5612         /* Default to all rates enabled */
5613         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5614                 sband = rdev->wiphy.bands[i];
5615                 mask.control[i].legacy =
5616                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5617                 if (sband)
5618                         memcpy(mask.control[i].mcs,
5619                                sband->ht_cap.mcs.rx_mask,
5620                                sizeof(mask.control[i].mcs));
5621                 else
5622                         memset(mask.control[i].mcs, 0,
5623                                sizeof(mask.control[i].mcs));
5624         }
5625
5626         /*
5627          * The nested attribute uses enum nl80211_band as the index. This maps
5628          * directly to the enum ieee80211_band values used in cfg80211.
5629          */
5630         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5631         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5632         {
5633                 enum ieee80211_band band = nla_type(tx_rates);
5634                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5635                         return -EINVAL;
5636                 sband = rdev->wiphy.bands[band];
5637                 if (sband == NULL)
5638                         return -EINVAL;
5639                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5640                           nla_len(tx_rates), nl80211_txattr_policy);
5641                 if (tb[NL80211_TXRATE_LEGACY]) {
5642                         mask.control[band].legacy = rateset_to_mask(
5643                                 sband,
5644                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5645                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5646                 }
5647                 if (tb[NL80211_TXRATE_MCS]) {
5648                         if (!ht_rateset_to_mask(
5649                                         sband,
5650                                         nla_data(tb[NL80211_TXRATE_MCS]),
5651                                         nla_len(tb[NL80211_TXRATE_MCS]),
5652                                         mask.control[band].mcs))
5653                                 return -EINVAL;
5654                 }
5655
5656                 if (mask.control[band].legacy == 0) {
5657                         /* don't allow empty legacy rates if HT
5658                          * is not even supported. */
5659                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5660                                 return -EINVAL;
5661
5662                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5663                                 if (mask.control[band].mcs[i])
5664                                         break;
5665
5666                         /* legacy and mcs rates may not be both empty */
5667                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5668                                 return -EINVAL;
5669                 }
5670         }
5671
5672         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5673 }
5674
5675 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5676 {
5677         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5678         struct net_device *dev = info->user_ptr[1];
5679         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5680
5681         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5682                 return -EINVAL;
5683
5684         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5685                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5686
5687         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5688             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5689             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5690             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5691             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5692             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5693             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5694                 return -EOPNOTSUPP;
5695
5696         /* not much point in registering if we can't reply */
5697         if (!rdev->ops->mgmt_tx)
5698                 return -EOPNOTSUPP;
5699
5700         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5701                         frame_type,
5702                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5703                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5704 }
5705
5706 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5707 {
5708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5709         struct net_device *dev = info->user_ptr[1];
5710         struct ieee80211_channel *chan;
5711         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5712         bool channel_type_valid = false;
5713         u32 freq;
5714         int err;
5715         void *hdr = NULL;
5716         u64 cookie;
5717         struct sk_buff *msg = NULL;
5718         unsigned int wait = 0;
5719         bool offchan, no_cck, dont_wait_for_ack;
5720
5721         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5722
5723         if (!info->attrs[NL80211_ATTR_FRAME] ||
5724             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5725                 return -EINVAL;
5726
5727         if (!rdev->ops->mgmt_tx)
5728                 return -EOPNOTSUPP;
5729
5730         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5731             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5732             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5733             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5734             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5735             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5736             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5737                 return -EOPNOTSUPP;
5738
5739         if (info->attrs[NL80211_ATTR_DURATION]) {
5740                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5741                         return -EINVAL;
5742                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5743         }
5744
5745         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5746                 channel_type = nla_get_u32(
5747                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5748                 if (channel_type != NL80211_CHAN_NO_HT &&
5749                     channel_type != NL80211_CHAN_HT20 &&
5750                     channel_type != NL80211_CHAN_HT40PLUS &&
5751                     channel_type != NL80211_CHAN_HT40MINUS)
5752                         return -EINVAL;
5753                 channel_type_valid = true;
5754         }
5755
5756         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5757
5758         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5759                 return -EINVAL;
5760
5761         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5762
5763         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5764         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5765         if (chan == NULL)
5766                 return -EINVAL;
5767
5768         if (!dont_wait_for_ack) {
5769                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5770                 if (!msg)
5771                         return -ENOMEM;
5772
5773                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5774                                      NL80211_CMD_FRAME);
5775
5776                 if (IS_ERR(hdr)) {
5777                         err = PTR_ERR(hdr);
5778                         goto free_msg;
5779                 }
5780         }
5781
5782         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5783                                     channel_type_valid, wait,
5784                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5785                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5786                                     no_cck, dont_wait_for_ack, &cookie);
5787         if (err)
5788                 goto free_msg;
5789
5790         if (msg) {
5791                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5792                         goto nla_put_failure;
5793
5794                 genlmsg_end(msg, hdr);
5795                 return genlmsg_reply(msg, info);
5796         }
5797
5798         return 0;
5799
5800  nla_put_failure:
5801         err = -ENOBUFS;
5802  free_msg:
5803         nlmsg_free(msg);
5804         return err;
5805 }
5806
5807 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5808 {
5809         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5810         struct net_device *dev = info->user_ptr[1];
5811         u64 cookie;
5812
5813         if (!info->attrs[NL80211_ATTR_COOKIE])
5814                 return -EINVAL;
5815
5816         if (!rdev->ops->mgmt_tx_cancel_wait)
5817                 return -EOPNOTSUPP;
5818
5819         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5820             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5821             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5822             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5823             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5824             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5825                 return -EOPNOTSUPP;
5826
5827         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5828
5829         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5830 }
5831
5832 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5833 {
5834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5835         struct wireless_dev *wdev;
5836         struct net_device *dev = info->user_ptr[1];
5837         u8 ps_state;
5838         bool state;
5839         int err;
5840
5841         if (!info->attrs[NL80211_ATTR_PS_STATE])
5842                 return -EINVAL;
5843
5844         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5845
5846         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5847                 return -EINVAL;
5848
5849         wdev = dev->ieee80211_ptr;
5850
5851         if (!rdev->ops->set_power_mgmt)
5852                 return -EOPNOTSUPP;
5853
5854         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5855
5856         if (state == wdev->ps)
5857                 return 0;
5858
5859         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5860                                         wdev->ps_timeout);
5861         if (!err)
5862                 wdev->ps = state;
5863         return err;
5864 }
5865
5866 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5867 {
5868         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5869         enum nl80211_ps_state ps_state;
5870         struct wireless_dev *wdev;
5871         struct net_device *dev = info->user_ptr[1];
5872         struct sk_buff *msg;
5873         void *hdr;
5874         int err;
5875
5876         wdev = dev->ieee80211_ptr;
5877
5878         if (!rdev->ops->set_power_mgmt)
5879                 return -EOPNOTSUPP;
5880
5881         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5882         if (!msg)
5883                 return -ENOMEM;
5884
5885         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5886                              NL80211_CMD_GET_POWER_SAVE);
5887         if (!hdr) {
5888                 err = -ENOBUFS;
5889                 goto free_msg;
5890         }
5891
5892         if (wdev->ps)
5893                 ps_state = NL80211_PS_ENABLED;
5894         else
5895                 ps_state = NL80211_PS_DISABLED;
5896
5897         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
5898                 goto nla_put_failure;
5899
5900         genlmsg_end(msg, hdr);
5901         return genlmsg_reply(msg, info);
5902
5903  nla_put_failure:
5904         err = -ENOBUFS;
5905  free_msg:
5906         nlmsg_free(msg);
5907         return err;
5908 }
5909
5910 static struct nla_policy
5911 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5912         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5913         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5914         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5915 };
5916
5917 static int nl80211_set_cqm_rssi(struct genl_info *info,
5918                                 s32 threshold, u32 hysteresis)
5919 {
5920         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5921         struct wireless_dev *wdev;
5922         struct net_device *dev = info->user_ptr[1];
5923
5924         if (threshold > 0)
5925                 return -EINVAL;
5926
5927         wdev = dev->ieee80211_ptr;
5928
5929         if (!rdev->ops->set_cqm_rssi_config)
5930                 return -EOPNOTSUPP;
5931
5932         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5933             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5934                 return -EOPNOTSUPP;
5935
5936         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5937                                               threshold, hysteresis);
5938 }
5939
5940 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5941 {
5942         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5943         struct nlattr *cqm;
5944         int err;
5945
5946         cqm = info->attrs[NL80211_ATTR_CQM];
5947         if (!cqm) {
5948                 err = -EINVAL;
5949                 goto out;
5950         }
5951
5952         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5953                                nl80211_attr_cqm_policy);
5954         if (err)
5955                 goto out;
5956
5957         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5958             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5959                 s32 threshold;
5960                 u32 hysteresis;
5961                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5962                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5963                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5964         } else
5965                 err = -EINVAL;
5966
5967 out:
5968         return err;
5969 }
5970
5971 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5972 {
5973         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5974         struct net_device *dev = info->user_ptr[1];
5975         struct mesh_config cfg;
5976         struct mesh_setup setup;
5977         int err;
5978
5979         /* start with default */
5980         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5981         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5982
5983         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5984                 /* and parse parameters if given */
5985                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5986                 if (err)
5987                         return err;
5988         }
5989
5990         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5991             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5992                 return -EINVAL;
5993
5994         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5995         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5996
5997         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5998             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
5999                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6000                         return -EINVAL;
6001
6002         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6003                 /* parse additional setup parameters if given */
6004                 err = nl80211_parse_mesh_setup(info, &setup);
6005                 if (err)
6006                         return err;
6007         }
6008
6009         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6010 }
6011
6012 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6013 {
6014         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6015         struct net_device *dev = info->user_ptr[1];
6016
6017         return cfg80211_leave_mesh(rdev, dev);
6018 }
6019
6020 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6021 {
6022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6023         struct sk_buff *msg;
6024         void *hdr;
6025
6026         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6027                 return -EOPNOTSUPP;
6028
6029         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6030         if (!msg)
6031                 return -ENOMEM;
6032
6033         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6034                              NL80211_CMD_GET_WOWLAN);
6035         if (!hdr)
6036                 goto nla_put_failure;
6037
6038         if (rdev->wowlan) {
6039                 struct nlattr *nl_wowlan;
6040
6041                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6042                 if (!nl_wowlan)
6043                         goto nla_put_failure;
6044
6045                 if ((rdev->wowlan->any &&
6046                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6047                     (rdev->wowlan->disconnect &&
6048                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6049                     (rdev->wowlan->magic_pkt &&
6050                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6051                     (rdev->wowlan->gtk_rekey_failure &&
6052                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6053                     (rdev->wowlan->eap_identity_req &&
6054                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6055                     (rdev->wowlan->four_way_handshake &&
6056                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6057                     (rdev->wowlan->rfkill_release &&
6058                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6059                         goto nla_put_failure;
6060                 if (rdev->wowlan->n_patterns) {
6061                         struct nlattr *nl_pats, *nl_pat;
6062                         int i, pat_len;
6063
6064                         nl_pats = nla_nest_start(msg,
6065                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6066                         if (!nl_pats)
6067                                 goto nla_put_failure;
6068
6069                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6070                                 nl_pat = nla_nest_start(msg, i + 1);
6071                                 if (!nl_pat)
6072                                         goto nla_put_failure;
6073                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6074                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6075                                             DIV_ROUND_UP(pat_len, 8),
6076                                             rdev->wowlan->patterns[i].mask) ||
6077                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6078                                             pat_len,
6079                                             rdev->wowlan->patterns[i].pattern))
6080                                         goto nla_put_failure;
6081                                 nla_nest_end(msg, nl_pat);
6082                         }
6083                         nla_nest_end(msg, nl_pats);
6084                 }
6085
6086                 nla_nest_end(msg, nl_wowlan);
6087         }
6088
6089         genlmsg_end(msg, hdr);
6090         return genlmsg_reply(msg, info);
6091
6092 nla_put_failure:
6093         nlmsg_free(msg);
6094         return -ENOBUFS;
6095 }
6096
6097 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6098 {
6099         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6100         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6101         struct cfg80211_wowlan no_triggers = {};
6102         struct cfg80211_wowlan new_triggers = {};
6103         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6104         int err, i;
6105         bool prev_enabled = rdev->wowlan;
6106
6107         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6108                 return -EOPNOTSUPP;
6109
6110         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6111                 goto no_triggers;
6112
6113         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6114                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6115                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6116                         nl80211_wowlan_policy);
6117         if (err)
6118                 return err;
6119
6120         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6121                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6122                         return -EINVAL;
6123                 new_triggers.any = true;
6124         }
6125
6126         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6127                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6128                         return -EINVAL;
6129                 new_triggers.disconnect = true;
6130         }
6131
6132         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6133                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6134                         return -EINVAL;
6135                 new_triggers.magic_pkt = true;
6136         }
6137
6138         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6139                 return -EINVAL;
6140
6141         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6142                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6143                         return -EINVAL;
6144                 new_triggers.gtk_rekey_failure = true;
6145         }
6146
6147         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6148                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6149                         return -EINVAL;
6150                 new_triggers.eap_identity_req = true;
6151         }
6152
6153         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6154                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6155                         return -EINVAL;
6156                 new_triggers.four_way_handshake = true;
6157         }
6158
6159         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6160                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6161                         return -EINVAL;
6162                 new_triggers.rfkill_release = true;
6163         }
6164
6165         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6166                 struct nlattr *pat;
6167                 int n_patterns = 0;
6168                 int rem, pat_len, mask_len;
6169                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6170
6171                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6172                                     rem)
6173                         n_patterns++;
6174                 if (n_patterns > wowlan->n_patterns)
6175                         return -EINVAL;
6176
6177                 new_triggers.patterns = kcalloc(n_patterns,
6178                                                 sizeof(new_triggers.patterns[0]),
6179                                                 GFP_KERNEL);
6180                 if (!new_triggers.patterns)
6181                         return -ENOMEM;
6182
6183                 new_triggers.n_patterns = n_patterns;
6184                 i = 0;
6185
6186                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6187                                     rem) {
6188                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6189                                   nla_data(pat), nla_len(pat), NULL);
6190                         err = -EINVAL;
6191                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6192                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6193                                 goto error;
6194                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6195                         mask_len = DIV_ROUND_UP(pat_len, 8);
6196                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6197                             mask_len)
6198                                 goto error;
6199                         if (pat_len > wowlan->pattern_max_len ||
6200                             pat_len < wowlan->pattern_min_len)
6201                                 goto error;
6202
6203                         new_triggers.patterns[i].mask =
6204                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6205                         if (!new_triggers.patterns[i].mask) {
6206                                 err = -ENOMEM;
6207                                 goto error;
6208                         }
6209                         new_triggers.patterns[i].pattern =
6210                                 new_triggers.patterns[i].mask + mask_len;
6211                         memcpy(new_triggers.patterns[i].mask,
6212                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6213                                mask_len);
6214                         new_triggers.patterns[i].pattern_len = pat_len;
6215                         memcpy(new_triggers.patterns[i].pattern,
6216                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6217                                pat_len);
6218                         i++;
6219                 }
6220         }
6221
6222         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6223                 struct cfg80211_wowlan *ntrig;
6224                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6225                                 GFP_KERNEL);
6226                 if (!ntrig) {
6227                         err = -ENOMEM;
6228                         goto error;
6229                 }
6230                 cfg80211_rdev_free_wowlan(rdev);
6231                 rdev->wowlan = ntrig;
6232         } else {
6233  no_triggers:
6234                 cfg80211_rdev_free_wowlan(rdev);
6235                 rdev->wowlan = NULL;
6236         }
6237
6238         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6239                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6240
6241         return 0;
6242  error:
6243         for (i = 0; i < new_triggers.n_patterns; i++)
6244                 kfree(new_triggers.patterns[i].mask);
6245         kfree(new_triggers.patterns);
6246         return err;
6247 }
6248
6249 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6250 {
6251         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6252         struct net_device *dev = info->user_ptr[1];
6253         struct wireless_dev *wdev = dev->ieee80211_ptr;
6254         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6255         struct cfg80211_gtk_rekey_data rekey_data;
6256         int err;
6257
6258         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6259                 return -EINVAL;
6260
6261         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6262                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6263                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6264                         nl80211_rekey_policy);
6265         if (err)
6266                 return err;
6267
6268         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6269                 return -ERANGE;
6270         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6271                 return -ERANGE;
6272         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6273                 return -ERANGE;
6274
6275         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6276                NL80211_KEK_LEN);
6277         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6278                NL80211_KCK_LEN);
6279         memcpy(rekey_data.replay_ctr,
6280                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6281                NL80211_REPLAY_CTR_LEN);
6282
6283         wdev_lock(wdev);
6284         if (!wdev->current_bss) {
6285                 err = -ENOTCONN;
6286                 goto out;
6287         }
6288
6289         if (!rdev->ops->set_rekey_data) {
6290                 err = -EOPNOTSUPP;
6291                 goto out;
6292         }
6293
6294         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6295  out:
6296         wdev_unlock(wdev);
6297         return err;
6298 }
6299
6300 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6301                                              struct genl_info *info)
6302 {
6303         struct net_device *dev = info->user_ptr[1];
6304         struct wireless_dev *wdev = dev->ieee80211_ptr;
6305
6306         if (wdev->iftype != NL80211_IFTYPE_AP &&
6307             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6308                 return -EINVAL;
6309
6310         if (wdev->ap_unexpected_nlpid)
6311                 return -EBUSY;
6312
6313         wdev->ap_unexpected_nlpid = info->snd_pid;
6314         return 0;
6315 }
6316
6317 static int nl80211_probe_client(struct sk_buff *skb,
6318                                 struct genl_info *info)
6319 {
6320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6321         struct net_device *dev = info->user_ptr[1];
6322         struct wireless_dev *wdev = dev->ieee80211_ptr;
6323         struct sk_buff *msg;
6324         void *hdr;
6325         const u8 *addr;
6326         u64 cookie;
6327         int err;
6328
6329         if (wdev->iftype != NL80211_IFTYPE_AP &&
6330             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6331                 return -EOPNOTSUPP;
6332
6333         if (!info->attrs[NL80211_ATTR_MAC])
6334                 return -EINVAL;
6335
6336         if (!rdev->ops->probe_client)
6337                 return -EOPNOTSUPP;
6338
6339         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6340         if (!msg)
6341                 return -ENOMEM;
6342
6343         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6344                              NL80211_CMD_PROBE_CLIENT);
6345
6346         if (IS_ERR(hdr)) {
6347                 err = PTR_ERR(hdr);
6348                 goto free_msg;
6349         }
6350
6351         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6352
6353         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6354         if (err)
6355                 goto free_msg;
6356
6357         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6358                 goto nla_put_failure;
6359
6360         genlmsg_end(msg, hdr);
6361
6362         return genlmsg_reply(msg, info);
6363
6364  nla_put_failure:
6365         err = -ENOBUFS;
6366  free_msg:
6367         nlmsg_free(msg);
6368         return err;
6369 }
6370
6371 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6372 {
6373         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6374
6375         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6376                 return -EOPNOTSUPP;
6377
6378         if (rdev->ap_beacons_nlpid)
6379                 return -EBUSY;
6380
6381         rdev->ap_beacons_nlpid = info->snd_pid;
6382
6383         return 0;
6384 }
6385
6386 #define NL80211_FLAG_NEED_WIPHY         0x01
6387 #define NL80211_FLAG_NEED_NETDEV        0x02
6388 #define NL80211_FLAG_NEED_RTNL          0x04
6389 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6390 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6391                                          NL80211_FLAG_CHECK_NETDEV_UP)
6392
6393 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6394                             struct genl_info *info)
6395 {
6396         struct cfg80211_registered_device *rdev;
6397         struct net_device *dev;
6398         int err;
6399         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6400
6401         if (rtnl)
6402                 rtnl_lock();
6403
6404         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6405                 rdev = cfg80211_get_dev_from_info(info);
6406                 if (IS_ERR(rdev)) {
6407                         if (rtnl)
6408                                 rtnl_unlock();
6409                         return PTR_ERR(rdev);
6410                 }
6411                 info->user_ptr[0] = rdev;
6412         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6413                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6414                                               &rdev, &dev);
6415                 if (err) {
6416                         if (rtnl)
6417                                 rtnl_unlock();
6418                         return err;
6419                 }
6420                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6421                     !netif_running(dev)) {
6422                         cfg80211_unlock_rdev(rdev);
6423                         dev_put(dev);
6424                         if (rtnl)
6425                                 rtnl_unlock();
6426                         return -ENETDOWN;
6427                 }
6428                 info->user_ptr[0] = rdev;
6429                 info->user_ptr[1] = dev;
6430         }
6431
6432         return 0;
6433 }
6434
6435 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6436                               struct genl_info *info)
6437 {
6438         if (info->user_ptr[0])
6439                 cfg80211_unlock_rdev(info->user_ptr[0]);
6440         if (info->user_ptr[1])
6441                 dev_put(info->user_ptr[1]);
6442         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6443                 rtnl_unlock();
6444 }
6445
6446 static struct genl_ops nl80211_ops[] = {
6447         {
6448                 .cmd = NL80211_CMD_GET_WIPHY,
6449                 .doit = nl80211_get_wiphy,
6450                 .dumpit = nl80211_dump_wiphy,
6451                 .policy = nl80211_policy,
6452                 /* can be retrieved by unprivileged users */
6453                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6454         },
6455         {
6456                 .cmd = NL80211_CMD_SET_WIPHY,
6457                 .doit = nl80211_set_wiphy,
6458                 .policy = nl80211_policy,
6459                 .flags = GENL_ADMIN_PERM,
6460                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6461         },
6462         {
6463                 .cmd = NL80211_CMD_GET_INTERFACE,
6464                 .doit = nl80211_get_interface,
6465                 .dumpit = nl80211_dump_interface,
6466                 .policy = nl80211_policy,
6467                 /* can be retrieved by unprivileged users */
6468                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6469         },
6470         {
6471                 .cmd = NL80211_CMD_SET_INTERFACE,
6472                 .doit = nl80211_set_interface,
6473                 .policy = nl80211_policy,
6474                 .flags = GENL_ADMIN_PERM,
6475                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6476                                   NL80211_FLAG_NEED_RTNL,
6477         },
6478         {
6479                 .cmd = NL80211_CMD_NEW_INTERFACE,
6480                 .doit = nl80211_new_interface,
6481                 .policy = nl80211_policy,
6482                 .flags = GENL_ADMIN_PERM,
6483                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6484                                   NL80211_FLAG_NEED_RTNL,
6485         },
6486         {
6487                 .cmd = NL80211_CMD_DEL_INTERFACE,
6488                 .doit = nl80211_del_interface,
6489                 .policy = nl80211_policy,
6490                 .flags = GENL_ADMIN_PERM,
6491                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6492                                   NL80211_FLAG_NEED_RTNL,
6493         },
6494         {
6495                 .cmd = NL80211_CMD_GET_KEY,
6496                 .doit = nl80211_get_key,
6497                 .policy = nl80211_policy,
6498                 .flags = GENL_ADMIN_PERM,
6499                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6500                                   NL80211_FLAG_NEED_RTNL,
6501         },
6502         {
6503                 .cmd = NL80211_CMD_SET_KEY,
6504                 .doit = nl80211_set_key,
6505                 .policy = nl80211_policy,
6506                 .flags = GENL_ADMIN_PERM,
6507                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6508                                   NL80211_FLAG_NEED_RTNL,
6509         },
6510         {
6511                 .cmd = NL80211_CMD_NEW_KEY,
6512                 .doit = nl80211_new_key,
6513                 .policy = nl80211_policy,
6514                 .flags = GENL_ADMIN_PERM,
6515                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6516                                   NL80211_FLAG_NEED_RTNL,
6517         },
6518         {
6519                 .cmd = NL80211_CMD_DEL_KEY,
6520                 .doit = nl80211_del_key,
6521                 .policy = nl80211_policy,
6522                 .flags = GENL_ADMIN_PERM,
6523                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6524                                   NL80211_FLAG_NEED_RTNL,
6525         },
6526         {
6527                 .cmd = NL80211_CMD_SET_BEACON,
6528                 .policy = nl80211_policy,
6529                 .flags = GENL_ADMIN_PERM,
6530                 .doit = nl80211_set_beacon,
6531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6532                                   NL80211_FLAG_NEED_RTNL,
6533         },
6534         {
6535                 .cmd = NL80211_CMD_START_AP,
6536                 .policy = nl80211_policy,
6537                 .flags = GENL_ADMIN_PERM,
6538                 .doit = nl80211_start_ap,
6539                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6540                                   NL80211_FLAG_NEED_RTNL,
6541         },
6542         {
6543                 .cmd = NL80211_CMD_STOP_AP,
6544                 .policy = nl80211_policy,
6545                 .flags = GENL_ADMIN_PERM,
6546                 .doit = nl80211_stop_ap,
6547                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6548                                   NL80211_FLAG_NEED_RTNL,
6549         },
6550         {
6551                 .cmd = NL80211_CMD_GET_STATION,
6552                 .doit = nl80211_get_station,
6553                 .dumpit = nl80211_dump_station,
6554                 .policy = nl80211_policy,
6555                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6556                                   NL80211_FLAG_NEED_RTNL,
6557         },
6558         {
6559                 .cmd = NL80211_CMD_SET_STATION,
6560                 .doit = nl80211_set_station,
6561                 .policy = nl80211_policy,
6562                 .flags = GENL_ADMIN_PERM,
6563                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6564                                   NL80211_FLAG_NEED_RTNL,
6565         },
6566         {
6567                 .cmd = NL80211_CMD_NEW_STATION,
6568                 .doit = nl80211_new_station,
6569                 .policy = nl80211_policy,
6570                 .flags = GENL_ADMIN_PERM,
6571                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6572                                   NL80211_FLAG_NEED_RTNL,
6573         },
6574         {
6575                 .cmd = NL80211_CMD_DEL_STATION,
6576                 .doit = nl80211_del_station,
6577                 .policy = nl80211_policy,
6578                 .flags = GENL_ADMIN_PERM,
6579                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6580                                   NL80211_FLAG_NEED_RTNL,
6581         },
6582         {
6583                 .cmd = NL80211_CMD_GET_MPATH,
6584                 .doit = nl80211_get_mpath,
6585                 .dumpit = nl80211_dump_mpath,
6586                 .policy = nl80211_policy,
6587                 .flags = GENL_ADMIN_PERM,
6588                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6589                                   NL80211_FLAG_NEED_RTNL,
6590         },
6591         {
6592                 .cmd = NL80211_CMD_SET_MPATH,
6593                 .doit = nl80211_set_mpath,
6594                 .policy = nl80211_policy,
6595                 .flags = GENL_ADMIN_PERM,
6596                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6597                                   NL80211_FLAG_NEED_RTNL,
6598         },
6599         {
6600                 .cmd = NL80211_CMD_NEW_MPATH,
6601                 .doit = nl80211_new_mpath,
6602                 .policy = nl80211_policy,
6603                 .flags = GENL_ADMIN_PERM,
6604                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6605                                   NL80211_FLAG_NEED_RTNL,
6606         },
6607         {
6608                 .cmd = NL80211_CMD_DEL_MPATH,
6609                 .doit = nl80211_del_mpath,
6610                 .policy = nl80211_policy,
6611                 .flags = GENL_ADMIN_PERM,
6612                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6613                                   NL80211_FLAG_NEED_RTNL,
6614         },
6615         {
6616                 .cmd = NL80211_CMD_SET_BSS,
6617                 .doit = nl80211_set_bss,
6618                 .policy = nl80211_policy,
6619                 .flags = GENL_ADMIN_PERM,
6620                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6621                                   NL80211_FLAG_NEED_RTNL,
6622         },
6623         {
6624                 .cmd = NL80211_CMD_GET_REG,
6625                 .doit = nl80211_get_reg,
6626                 .policy = nl80211_policy,
6627                 /* can be retrieved by unprivileged users */
6628         },
6629         {
6630                 .cmd = NL80211_CMD_SET_REG,
6631                 .doit = nl80211_set_reg,
6632                 .policy = nl80211_policy,
6633                 .flags = GENL_ADMIN_PERM,
6634         },
6635         {
6636                 .cmd = NL80211_CMD_REQ_SET_REG,
6637                 .doit = nl80211_req_set_reg,
6638                 .policy = nl80211_policy,
6639                 .flags = GENL_ADMIN_PERM,
6640         },
6641         {
6642                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6643                 .doit = nl80211_get_mesh_config,
6644                 .policy = nl80211_policy,
6645                 /* can be retrieved by unprivileged users */
6646                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6647                                   NL80211_FLAG_NEED_RTNL,
6648         },
6649         {
6650                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6651                 .doit = nl80211_update_mesh_config,
6652                 .policy = nl80211_policy,
6653                 .flags = GENL_ADMIN_PERM,
6654                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6655                                   NL80211_FLAG_NEED_RTNL,
6656         },
6657         {
6658                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6659                 .doit = nl80211_trigger_scan,
6660                 .policy = nl80211_policy,
6661                 .flags = GENL_ADMIN_PERM,
6662                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6663                                   NL80211_FLAG_NEED_RTNL,
6664         },
6665         {
6666                 .cmd = NL80211_CMD_GET_SCAN,
6667                 .policy = nl80211_policy,
6668                 .dumpit = nl80211_dump_scan,
6669         },
6670         {
6671                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6672                 .doit = nl80211_start_sched_scan,
6673                 .policy = nl80211_policy,
6674                 .flags = GENL_ADMIN_PERM,
6675                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6676                                   NL80211_FLAG_NEED_RTNL,
6677         },
6678         {
6679                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6680                 .doit = nl80211_stop_sched_scan,
6681                 .policy = nl80211_policy,
6682                 .flags = GENL_ADMIN_PERM,
6683                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6684                                   NL80211_FLAG_NEED_RTNL,
6685         },
6686         {
6687                 .cmd = NL80211_CMD_AUTHENTICATE,
6688                 .doit = nl80211_authenticate,
6689                 .policy = nl80211_policy,
6690                 .flags = GENL_ADMIN_PERM,
6691                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6692                                   NL80211_FLAG_NEED_RTNL,
6693         },
6694         {
6695                 .cmd = NL80211_CMD_ASSOCIATE,
6696                 .doit = nl80211_associate,
6697                 .policy = nl80211_policy,
6698                 .flags = GENL_ADMIN_PERM,
6699                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6700                                   NL80211_FLAG_NEED_RTNL,
6701         },
6702         {
6703                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6704                 .doit = nl80211_deauthenticate,
6705                 .policy = nl80211_policy,
6706                 .flags = GENL_ADMIN_PERM,
6707                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6708                                   NL80211_FLAG_NEED_RTNL,
6709         },
6710         {
6711                 .cmd = NL80211_CMD_DISASSOCIATE,
6712                 .doit = nl80211_disassociate,
6713                 .policy = nl80211_policy,
6714                 .flags = GENL_ADMIN_PERM,
6715                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6716                                   NL80211_FLAG_NEED_RTNL,
6717         },
6718         {
6719                 .cmd = NL80211_CMD_JOIN_IBSS,
6720                 .doit = nl80211_join_ibss,
6721                 .policy = nl80211_policy,
6722                 .flags = GENL_ADMIN_PERM,
6723                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6724                                   NL80211_FLAG_NEED_RTNL,
6725         },
6726         {
6727                 .cmd = NL80211_CMD_LEAVE_IBSS,
6728                 .doit = nl80211_leave_ibss,
6729                 .policy = nl80211_policy,
6730                 .flags = GENL_ADMIN_PERM,
6731                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6732                                   NL80211_FLAG_NEED_RTNL,
6733         },
6734 #ifdef CONFIG_NL80211_TESTMODE
6735         {
6736                 .cmd = NL80211_CMD_TESTMODE,
6737                 .doit = nl80211_testmode_do,
6738                 .dumpit = nl80211_testmode_dump,
6739                 .policy = nl80211_policy,
6740                 .flags = GENL_ADMIN_PERM,
6741                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6742                                   NL80211_FLAG_NEED_RTNL,
6743         },
6744 #endif
6745         {
6746                 .cmd = NL80211_CMD_CONNECT,
6747                 .doit = nl80211_connect,
6748                 .policy = nl80211_policy,
6749                 .flags = GENL_ADMIN_PERM,
6750                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6751                                   NL80211_FLAG_NEED_RTNL,
6752         },
6753         {
6754                 .cmd = NL80211_CMD_DISCONNECT,
6755                 .doit = nl80211_disconnect,
6756                 .policy = nl80211_policy,
6757                 .flags = GENL_ADMIN_PERM,
6758                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6759                                   NL80211_FLAG_NEED_RTNL,
6760         },
6761         {
6762                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6763                 .doit = nl80211_wiphy_netns,
6764                 .policy = nl80211_policy,
6765                 .flags = GENL_ADMIN_PERM,
6766                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6767                                   NL80211_FLAG_NEED_RTNL,
6768         },
6769         {
6770                 .cmd = NL80211_CMD_GET_SURVEY,
6771                 .policy = nl80211_policy,
6772                 .dumpit = nl80211_dump_survey,
6773         },
6774         {
6775                 .cmd = NL80211_CMD_SET_PMKSA,
6776                 .doit = nl80211_setdel_pmksa,
6777                 .policy = nl80211_policy,
6778                 .flags = GENL_ADMIN_PERM,
6779                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6780                                   NL80211_FLAG_NEED_RTNL,
6781         },
6782         {
6783                 .cmd = NL80211_CMD_DEL_PMKSA,
6784                 .doit = nl80211_setdel_pmksa,
6785                 .policy = nl80211_policy,
6786                 .flags = GENL_ADMIN_PERM,
6787                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6788                                   NL80211_FLAG_NEED_RTNL,
6789         },
6790         {
6791                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6792                 .doit = nl80211_flush_pmksa,
6793                 .policy = nl80211_policy,
6794                 .flags = GENL_ADMIN_PERM,
6795                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6796                                   NL80211_FLAG_NEED_RTNL,
6797         },
6798         {
6799                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6800                 .doit = nl80211_remain_on_channel,
6801                 .policy = nl80211_policy,
6802                 .flags = GENL_ADMIN_PERM,
6803                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6804                                   NL80211_FLAG_NEED_RTNL,
6805         },
6806         {
6807                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6808                 .doit = nl80211_cancel_remain_on_channel,
6809                 .policy = nl80211_policy,
6810                 .flags = GENL_ADMIN_PERM,
6811                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6812                                   NL80211_FLAG_NEED_RTNL,
6813         },
6814         {
6815                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6816                 .doit = nl80211_set_tx_bitrate_mask,
6817                 .policy = nl80211_policy,
6818                 .flags = GENL_ADMIN_PERM,
6819                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6820                                   NL80211_FLAG_NEED_RTNL,
6821         },
6822         {
6823                 .cmd = NL80211_CMD_REGISTER_FRAME,
6824                 .doit = nl80211_register_mgmt,
6825                 .policy = nl80211_policy,
6826                 .flags = GENL_ADMIN_PERM,
6827                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6828                                   NL80211_FLAG_NEED_RTNL,
6829         },
6830         {
6831                 .cmd = NL80211_CMD_FRAME,
6832                 .doit = nl80211_tx_mgmt,
6833                 .policy = nl80211_policy,
6834                 .flags = GENL_ADMIN_PERM,
6835                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6836                                   NL80211_FLAG_NEED_RTNL,
6837         },
6838         {
6839                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6840                 .doit = nl80211_tx_mgmt_cancel_wait,
6841                 .policy = nl80211_policy,
6842                 .flags = GENL_ADMIN_PERM,
6843                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6844                                   NL80211_FLAG_NEED_RTNL,
6845         },
6846         {
6847                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6848                 .doit = nl80211_set_power_save,
6849                 .policy = nl80211_policy,
6850                 .flags = GENL_ADMIN_PERM,
6851                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6852                                   NL80211_FLAG_NEED_RTNL,
6853         },
6854         {
6855                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6856                 .doit = nl80211_get_power_save,
6857                 .policy = nl80211_policy,
6858                 /* can be retrieved by unprivileged users */
6859                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6860                                   NL80211_FLAG_NEED_RTNL,
6861         },
6862         {
6863                 .cmd = NL80211_CMD_SET_CQM,
6864                 .doit = nl80211_set_cqm,
6865                 .policy = nl80211_policy,
6866                 .flags = GENL_ADMIN_PERM,
6867                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6868                                   NL80211_FLAG_NEED_RTNL,
6869         },
6870         {
6871                 .cmd = NL80211_CMD_SET_CHANNEL,
6872                 .doit = nl80211_set_channel,
6873                 .policy = nl80211_policy,
6874                 .flags = GENL_ADMIN_PERM,
6875                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6876                                   NL80211_FLAG_NEED_RTNL,
6877         },
6878         {
6879                 .cmd = NL80211_CMD_SET_WDS_PEER,
6880                 .doit = nl80211_set_wds_peer,
6881                 .policy = nl80211_policy,
6882                 .flags = GENL_ADMIN_PERM,
6883                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6884                                   NL80211_FLAG_NEED_RTNL,
6885         },
6886         {
6887                 .cmd = NL80211_CMD_JOIN_MESH,
6888                 .doit = nl80211_join_mesh,
6889                 .policy = nl80211_policy,
6890                 .flags = GENL_ADMIN_PERM,
6891                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6892                                   NL80211_FLAG_NEED_RTNL,
6893         },
6894         {
6895                 .cmd = NL80211_CMD_LEAVE_MESH,
6896                 .doit = nl80211_leave_mesh,
6897                 .policy = nl80211_policy,
6898                 .flags = GENL_ADMIN_PERM,
6899                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6900                                   NL80211_FLAG_NEED_RTNL,
6901         },
6902         {
6903                 .cmd = NL80211_CMD_GET_WOWLAN,
6904                 .doit = nl80211_get_wowlan,
6905                 .policy = nl80211_policy,
6906                 /* can be retrieved by unprivileged users */
6907                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6908                                   NL80211_FLAG_NEED_RTNL,
6909         },
6910         {
6911                 .cmd = NL80211_CMD_SET_WOWLAN,
6912                 .doit = nl80211_set_wowlan,
6913                 .policy = nl80211_policy,
6914                 .flags = GENL_ADMIN_PERM,
6915                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6916                                   NL80211_FLAG_NEED_RTNL,
6917         },
6918         {
6919                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6920                 .doit = nl80211_set_rekey_data,
6921                 .policy = nl80211_policy,
6922                 .flags = GENL_ADMIN_PERM,
6923                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6924                                   NL80211_FLAG_NEED_RTNL,
6925         },
6926         {
6927                 .cmd = NL80211_CMD_TDLS_MGMT,
6928                 .doit = nl80211_tdls_mgmt,
6929                 .policy = nl80211_policy,
6930                 .flags = GENL_ADMIN_PERM,
6931                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6932                                   NL80211_FLAG_NEED_RTNL,
6933         },
6934         {
6935                 .cmd = NL80211_CMD_TDLS_OPER,
6936                 .doit = nl80211_tdls_oper,
6937                 .policy = nl80211_policy,
6938                 .flags = GENL_ADMIN_PERM,
6939                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6940                                   NL80211_FLAG_NEED_RTNL,
6941         },
6942         {
6943                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6944                 .doit = nl80211_register_unexpected_frame,
6945                 .policy = nl80211_policy,
6946                 .flags = GENL_ADMIN_PERM,
6947                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6948                                   NL80211_FLAG_NEED_RTNL,
6949         },
6950         {
6951                 .cmd = NL80211_CMD_PROBE_CLIENT,
6952                 .doit = nl80211_probe_client,
6953                 .policy = nl80211_policy,
6954                 .flags = GENL_ADMIN_PERM,
6955                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6956                                   NL80211_FLAG_NEED_RTNL,
6957         },
6958         {
6959                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6960                 .doit = nl80211_register_beacons,
6961                 .policy = nl80211_policy,
6962                 .flags = GENL_ADMIN_PERM,
6963                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6964                                   NL80211_FLAG_NEED_RTNL,
6965         },
6966         {
6967                 .cmd = NL80211_CMD_SET_NOACK_MAP,
6968                 .doit = nl80211_set_noack_map,
6969                 .policy = nl80211_policy,
6970                 .flags = GENL_ADMIN_PERM,
6971                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6972                                   NL80211_FLAG_NEED_RTNL,
6973         },
6974
6975 };
6976
6977 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6978         .name = "mlme",
6979 };
6980
6981 /* multicast groups */
6982 static struct genl_multicast_group nl80211_config_mcgrp = {
6983         .name = "config",
6984 };
6985 static struct genl_multicast_group nl80211_scan_mcgrp = {
6986         .name = "scan",
6987 };
6988 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6989         .name = "regulatory",
6990 };
6991
6992 /* notification functions */
6993
6994 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6995 {
6996         struct sk_buff *msg;
6997
6998         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6999         if (!msg)
7000                 return;
7001
7002         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7003                 nlmsg_free(msg);
7004                 return;
7005         }
7006
7007         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7008                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7009 }
7010
7011 static int nl80211_add_scan_req(struct sk_buff *msg,
7012                                 struct cfg80211_registered_device *rdev)
7013 {
7014         struct cfg80211_scan_request *req = rdev->scan_req;
7015         struct nlattr *nest;
7016         int i;
7017
7018         ASSERT_RDEV_LOCK(rdev);
7019
7020         if (WARN_ON(!req))
7021                 return 0;
7022
7023         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7024         if (!nest)
7025                 goto nla_put_failure;
7026         for (i = 0; i < req->n_ssids; i++) {
7027                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7028                         goto nla_put_failure;
7029         }
7030         nla_nest_end(msg, nest);
7031
7032         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7033         if (!nest)
7034                 goto nla_put_failure;
7035         for (i = 0; i < req->n_channels; i++) {
7036                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7037                         goto nla_put_failure;
7038         }
7039         nla_nest_end(msg, nest);
7040
7041         if (req->ie &&
7042             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7043                 goto nla_put_failure;
7044
7045         return 0;
7046  nla_put_failure:
7047         return -ENOBUFS;
7048 }
7049
7050 static int nl80211_send_scan_msg(struct sk_buff *msg,
7051                                  struct cfg80211_registered_device *rdev,
7052                                  struct net_device *netdev,
7053                                  u32 pid, u32 seq, int flags,
7054                                  u32 cmd)
7055 {
7056         void *hdr;
7057
7058         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7059         if (!hdr)
7060                 return -1;
7061
7062         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7063             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7064                 goto nla_put_failure;
7065
7066         /* ignore errors and send incomplete event anyway */
7067         nl80211_add_scan_req(msg, rdev);
7068
7069         return genlmsg_end(msg, hdr);
7070
7071  nla_put_failure:
7072         genlmsg_cancel(msg, hdr);
7073         return -EMSGSIZE;
7074 }
7075
7076 static int
7077 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7078                             struct cfg80211_registered_device *rdev,
7079                             struct net_device *netdev,
7080                             u32 pid, u32 seq, int flags, u32 cmd)
7081 {
7082         void *hdr;
7083
7084         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7085         if (!hdr)
7086                 return -1;
7087
7088         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7089             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7090                 goto nla_put_failure;
7091
7092         return genlmsg_end(msg, hdr);
7093
7094  nla_put_failure:
7095         genlmsg_cancel(msg, hdr);
7096         return -EMSGSIZE;
7097 }
7098
7099 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7100                              struct net_device *netdev)
7101 {
7102         struct sk_buff *msg;
7103
7104         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7105         if (!msg)
7106                 return;
7107
7108         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7109                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7110                 nlmsg_free(msg);
7111                 return;
7112         }
7113
7114         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7115                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7116 }
7117
7118 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7119                             struct net_device *netdev)
7120 {
7121         struct sk_buff *msg;
7122
7123         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7124         if (!msg)
7125                 return;
7126
7127         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7128                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7129                 nlmsg_free(msg);
7130                 return;
7131         }
7132
7133         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7134                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7135 }
7136
7137 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7138                                struct net_device *netdev)
7139 {
7140         struct sk_buff *msg;
7141
7142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7143         if (!msg)
7144                 return;
7145
7146         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7147                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7148                 nlmsg_free(msg);
7149                 return;
7150         }
7151
7152         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7153                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7154 }
7155
7156 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7157                                      struct net_device *netdev)
7158 {
7159         struct sk_buff *msg;
7160
7161         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7162         if (!msg)
7163                 return;
7164
7165         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7166                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7167                 nlmsg_free(msg);
7168                 return;
7169         }
7170
7171         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7172                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7173 }
7174
7175 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7176                              struct net_device *netdev, u32 cmd)
7177 {
7178         struct sk_buff *msg;
7179
7180         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7181         if (!msg)
7182                 return;
7183
7184         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7185                 nlmsg_free(msg);
7186                 return;
7187         }
7188
7189         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7190                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7191 }
7192
7193 /*
7194  * This can happen on global regulatory changes or device specific settings
7195  * based on custom world regulatory domains.
7196  */
7197 void nl80211_send_reg_change_event(struct regulatory_request *request)
7198 {
7199         struct sk_buff *msg;
7200         void *hdr;
7201
7202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7203         if (!msg)
7204                 return;
7205
7206         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7207         if (!hdr) {
7208                 nlmsg_free(msg);
7209                 return;
7210         }
7211
7212         /* Userspace can always count this one always being set */
7213         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7214                 goto nla_put_failure;
7215
7216         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7217                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7218                                NL80211_REGDOM_TYPE_WORLD))
7219                         goto nla_put_failure;
7220         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7221                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7222                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7223                         goto nla_put_failure;
7224         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7225                    request->intersect) {
7226                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7227                                NL80211_REGDOM_TYPE_INTERSECTION))
7228                         goto nla_put_failure;
7229         } else {
7230                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7231                                NL80211_REGDOM_TYPE_COUNTRY) ||
7232                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7233                                    request->alpha2))
7234                         goto nla_put_failure;
7235         }
7236
7237         if (wiphy_idx_valid(request->wiphy_idx) &&
7238             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7239                 goto nla_put_failure;
7240
7241         genlmsg_end(msg, hdr);
7242
7243         rcu_read_lock();
7244         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7245                                 GFP_ATOMIC);
7246         rcu_read_unlock();
7247
7248         return;
7249
7250 nla_put_failure:
7251         genlmsg_cancel(msg, hdr);
7252         nlmsg_free(msg);
7253 }
7254
7255 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7256                                     struct net_device *netdev,
7257                                     const u8 *buf, size_t len,
7258                                     enum nl80211_commands cmd, gfp_t gfp)
7259 {
7260         struct sk_buff *msg;
7261         void *hdr;
7262
7263         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7264         if (!msg)
7265                 return;
7266
7267         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7268         if (!hdr) {
7269                 nlmsg_free(msg);
7270                 return;
7271         }
7272
7273         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7274             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7275             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7276                 goto nla_put_failure;
7277
7278         genlmsg_end(msg, hdr);
7279
7280         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7281                                 nl80211_mlme_mcgrp.id, gfp);
7282         return;
7283
7284  nla_put_failure:
7285         genlmsg_cancel(msg, hdr);
7286         nlmsg_free(msg);
7287 }
7288
7289 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7290                           struct net_device *netdev, const u8 *buf,
7291                           size_t len, gfp_t gfp)
7292 {
7293         nl80211_send_mlme_event(rdev, netdev, buf, len,
7294                                 NL80211_CMD_AUTHENTICATE, gfp);
7295 }
7296
7297 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7298                            struct net_device *netdev, const u8 *buf,
7299                            size_t len, gfp_t gfp)
7300 {
7301         nl80211_send_mlme_event(rdev, netdev, buf, len,
7302                                 NL80211_CMD_ASSOCIATE, gfp);
7303 }
7304
7305 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7306                          struct net_device *netdev, const u8 *buf,
7307                          size_t len, gfp_t gfp)
7308 {
7309         nl80211_send_mlme_event(rdev, netdev, buf, len,
7310                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7311 }
7312
7313 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7314                            struct net_device *netdev, const u8 *buf,
7315                            size_t len, gfp_t gfp)
7316 {
7317         nl80211_send_mlme_event(rdev, netdev, buf, len,
7318                                 NL80211_CMD_DISASSOCIATE, gfp);
7319 }
7320
7321 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7322                                 struct net_device *netdev, const u8 *buf,
7323                                 size_t len, gfp_t gfp)
7324 {
7325         nl80211_send_mlme_event(rdev, netdev, buf, len,
7326                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7327 }
7328
7329 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7330                                   struct net_device *netdev, const u8 *buf,
7331                                   size_t len, gfp_t gfp)
7332 {
7333         nl80211_send_mlme_event(rdev, netdev, buf, len,
7334                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7335 }
7336
7337 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7338                                       struct net_device *netdev, int cmd,
7339                                       const u8 *addr, gfp_t gfp)
7340 {
7341         struct sk_buff *msg;
7342         void *hdr;
7343
7344         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7345         if (!msg)
7346                 return;
7347
7348         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7349         if (!hdr) {
7350                 nlmsg_free(msg);
7351                 return;
7352         }
7353
7354         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7355             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7356             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7357             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7358                 goto nla_put_failure;
7359
7360         genlmsg_end(msg, hdr);
7361
7362         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7363                                 nl80211_mlme_mcgrp.id, gfp);
7364         return;
7365
7366  nla_put_failure:
7367         genlmsg_cancel(msg, hdr);
7368         nlmsg_free(msg);
7369 }
7370
7371 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7372                                struct net_device *netdev, const u8 *addr,
7373                                gfp_t gfp)
7374 {
7375         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7376                                   addr, gfp);
7377 }
7378
7379 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7380                                 struct net_device *netdev, const u8 *addr,
7381                                 gfp_t gfp)
7382 {
7383         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7384                                   addr, gfp);
7385 }
7386
7387 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7388                                  struct net_device *netdev, const u8 *bssid,
7389                                  const u8 *req_ie, size_t req_ie_len,
7390                                  const u8 *resp_ie, size_t resp_ie_len,
7391                                  u16 status, gfp_t gfp)
7392 {
7393         struct sk_buff *msg;
7394         void *hdr;
7395
7396         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7397         if (!msg)
7398                 return;
7399
7400         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7401         if (!hdr) {
7402                 nlmsg_free(msg);
7403                 return;
7404         }
7405
7406         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7407             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7408             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7409             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7410             (req_ie &&
7411              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7412             (resp_ie &&
7413              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7414                 goto nla_put_failure;
7415
7416         genlmsg_end(msg, hdr);
7417
7418         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7419                                 nl80211_mlme_mcgrp.id, gfp);
7420         return;
7421
7422  nla_put_failure:
7423         genlmsg_cancel(msg, hdr);
7424         nlmsg_free(msg);
7425
7426 }
7427
7428 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7429                          struct net_device *netdev, const u8 *bssid,
7430                          const u8 *req_ie, size_t req_ie_len,
7431                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7432 {
7433         struct sk_buff *msg;
7434         void *hdr;
7435
7436         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7437         if (!msg)
7438                 return;
7439
7440         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7441         if (!hdr) {
7442                 nlmsg_free(msg);
7443                 return;
7444         }
7445
7446         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7447             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7448             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7449             (req_ie &&
7450              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7451             (resp_ie &&
7452              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7453                 goto nla_put_failure;
7454
7455         genlmsg_end(msg, hdr);
7456
7457         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7458                                 nl80211_mlme_mcgrp.id, gfp);
7459         return;
7460
7461  nla_put_failure:
7462         genlmsg_cancel(msg, hdr);
7463         nlmsg_free(msg);
7464
7465 }
7466
7467 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7468                                struct net_device *netdev, u16 reason,
7469                                const u8 *ie, size_t ie_len, bool from_ap)
7470 {
7471         struct sk_buff *msg;
7472         void *hdr;
7473
7474         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7475         if (!msg)
7476                 return;
7477
7478         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7479         if (!hdr) {
7480                 nlmsg_free(msg);
7481                 return;
7482         }
7483
7484         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7485             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7486             (from_ap && reason &&
7487              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7488             (from_ap &&
7489              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7490             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7491                 goto nla_put_failure;
7492
7493         genlmsg_end(msg, hdr);
7494
7495         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7496                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7497         return;
7498
7499  nla_put_failure:
7500         genlmsg_cancel(msg, hdr);
7501         nlmsg_free(msg);
7502
7503 }
7504
7505 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7506                              struct net_device *netdev, const u8 *bssid,
7507                              gfp_t gfp)
7508 {
7509         struct sk_buff *msg;
7510         void *hdr;
7511
7512         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7513         if (!msg)
7514                 return;
7515
7516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7517         if (!hdr) {
7518                 nlmsg_free(msg);
7519                 return;
7520         }
7521
7522         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7523             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7524             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7525                 goto nla_put_failure;
7526
7527         genlmsg_end(msg, hdr);
7528
7529         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7530                                 nl80211_mlme_mcgrp.id, gfp);
7531         return;
7532
7533  nla_put_failure:
7534         genlmsg_cancel(msg, hdr);
7535         nlmsg_free(msg);
7536 }
7537
7538 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7539                 struct net_device *netdev,
7540                 const u8 *macaddr, const u8* ie, u8 ie_len,
7541                 gfp_t gfp)
7542 {
7543         struct sk_buff *msg;
7544         void *hdr;
7545
7546         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7547         if (!msg)
7548                 return;
7549
7550         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7551         if (!hdr) {
7552                 nlmsg_free(msg);
7553                 return;
7554         }
7555
7556         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7557             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7558             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7559             (ie_len && ie &&
7560              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7561                 goto nla_put_failure;
7562
7563         genlmsg_end(msg, hdr);
7564
7565         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7566                                 nl80211_mlme_mcgrp.id, gfp);
7567         return;
7568
7569  nla_put_failure:
7570         genlmsg_cancel(msg, hdr);
7571         nlmsg_free(msg);
7572 }
7573
7574 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7575                                  struct net_device *netdev, const u8 *addr,
7576                                  enum nl80211_key_type key_type, int key_id,
7577                                  const u8 *tsc, gfp_t gfp)
7578 {
7579         struct sk_buff *msg;
7580         void *hdr;
7581
7582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7583         if (!msg)
7584                 return;
7585
7586         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7587         if (!hdr) {
7588                 nlmsg_free(msg);
7589                 return;
7590         }
7591
7592         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7593             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7594             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7595             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7596             (key_id != -1 &&
7597              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7598             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7599                 goto nla_put_failure;
7600
7601         genlmsg_end(msg, hdr);
7602
7603         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7604                                 nl80211_mlme_mcgrp.id, gfp);
7605         return;
7606
7607  nla_put_failure:
7608         genlmsg_cancel(msg, hdr);
7609         nlmsg_free(msg);
7610 }
7611
7612 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7613                                     struct ieee80211_channel *channel_before,
7614                                     struct ieee80211_channel *channel_after)
7615 {
7616         struct sk_buff *msg;
7617         void *hdr;
7618         struct nlattr *nl_freq;
7619
7620         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7621         if (!msg)
7622                 return;
7623
7624         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7625         if (!hdr) {
7626                 nlmsg_free(msg);
7627                 return;
7628         }
7629
7630         /*
7631          * Since we are applying the beacon hint to a wiphy we know its
7632          * wiphy_idx is valid
7633          */
7634         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7635                 goto nla_put_failure;
7636
7637         /* Before */
7638         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7639         if (!nl_freq)
7640                 goto nla_put_failure;
7641         if (nl80211_msg_put_channel(msg, channel_before))
7642                 goto nla_put_failure;
7643         nla_nest_end(msg, nl_freq);
7644
7645         /* After */
7646         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7647         if (!nl_freq)
7648                 goto nla_put_failure;
7649         if (nl80211_msg_put_channel(msg, channel_after))
7650                 goto nla_put_failure;
7651         nla_nest_end(msg, nl_freq);
7652
7653         genlmsg_end(msg, hdr);
7654
7655         rcu_read_lock();
7656         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7657                                 GFP_ATOMIC);
7658         rcu_read_unlock();
7659
7660         return;
7661
7662 nla_put_failure:
7663         genlmsg_cancel(msg, hdr);
7664         nlmsg_free(msg);
7665 }
7666
7667 static void nl80211_send_remain_on_chan_event(
7668         int cmd, struct cfg80211_registered_device *rdev,
7669         struct net_device *netdev, u64 cookie,
7670         struct ieee80211_channel *chan,
7671         enum nl80211_channel_type channel_type,
7672         unsigned int duration, gfp_t gfp)
7673 {
7674         struct sk_buff *msg;
7675         void *hdr;
7676
7677         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7678         if (!msg)
7679                 return;
7680
7681         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7682         if (!hdr) {
7683                 nlmsg_free(msg);
7684                 return;
7685         }
7686
7687         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7688             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7689             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7690             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7691             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7692                 goto nla_put_failure;
7693
7694         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7695             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7696                 goto nla_put_failure;
7697
7698         genlmsg_end(msg, hdr);
7699
7700         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7701                                 nl80211_mlme_mcgrp.id, gfp);
7702         return;
7703
7704  nla_put_failure:
7705         genlmsg_cancel(msg, hdr);
7706         nlmsg_free(msg);
7707 }
7708
7709 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7710                                     struct net_device *netdev, u64 cookie,
7711                                     struct ieee80211_channel *chan,
7712                                     enum nl80211_channel_type channel_type,
7713                                     unsigned int duration, gfp_t gfp)
7714 {
7715         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7716                                           rdev, netdev, cookie, chan,
7717                                           channel_type, duration, gfp);
7718 }
7719
7720 void nl80211_send_remain_on_channel_cancel(
7721         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7722         u64 cookie, struct ieee80211_channel *chan,
7723         enum nl80211_channel_type channel_type, gfp_t gfp)
7724 {
7725         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7726                                           rdev, netdev, cookie, chan,
7727                                           channel_type, 0, gfp);
7728 }
7729
7730 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7731                             struct net_device *dev, const u8 *mac_addr,
7732                             struct station_info *sinfo, gfp_t gfp)
7733 {
7734         struct sk_buff *msg;
7735
7736         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7737         if (!msg)
7738                 return;
7739
7740         if (nl80211_send_station(msg, 0, 0, 0,
7741                                  rdev, dev, mac_addr, sinfo) < 0) {
7742                 nlmsg_free(msg);
7743                 return;
7744         }
7745
7746         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7747                                 nl80211_mlme_mcgrp.id, gfp);
7748 }
7749
7750 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7751                                 struct net_device *dev, const u8 *mac_addr,
7752                                 gfp_t gfp)
7753 {
7754         struct sk_buff *msg;
7755         void *hdr;
7756
7757         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7758         if (!msg)
7759                 return;
7760
7761         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7762         if (!hdr) {
7763                 nlmsg_free(msg);
7764                 return;
7765         }
7766
7767         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7768             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
7769                 goto nla_put_failure;
7770
7771         genlmsg_end(msg, hdr);
7772
7773         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7774                                 nl80211_mlme_mcgrp.id, gfp);
7775         return;
7776
7777  nla_put_failure:
7778         genlmsg_cancel(msg, hdr);
7779         nlmsg_free(msg);
7780 }
7781
7782 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7783                                        const u8 *addr, gfp_t gfp)
7784 {
7785         struct wireless_dev *wdev = dev->ieee80211_ptr;
7786         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7787         struct sk_buff *msg;
7788         void *hdr;
7789         int err;
7790         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7791
7792         if (!nlpid)
7793                 return false;
7794
7795         msg = nlmsg_new(100, gfp);
7796         if (!msg)
7797                 return true;
7798
7799         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7800         if (!hdr) {
7801                 nlmsg_free(msg);
7802                 return true;
7803         }
7804
7805         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7806             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7807             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7808                 goto nla_put_failure;
7809
7810         err = genlmsg_end(msg, hdr);
7811         if (err < 0) {
7812                 nlmsg_free(msg);
7813                 return true;
7814         }
7815
7816         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7817         return true;
7818
7819  nla_put_failure:
7820         genlmsg_cancel(msg, hdr);
7821         nlmsg_free(msg);
7822         return true;
7823 }
7824
7825 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7826 {
7827         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7828                                           addr, gfp);
7829 }
7830
7831 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7832                                     const u8 *addr, gfp_t gfp)
7833 {
7834         return __nl80211_unexpected_frame(dev,
7835                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7836                                           addr, gfp);
7837 }
7838
7839 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7840                       struct net_device *netdev, u32 nlpid,
7841                       int freq, int sig_dbm,
7842                       const u8 *buf, size_t len, gfp_t gfp)
7843 {
7844         struct sk_buff *msg;
7845         void *hdr;
7846
7847         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7848         if (!msg)
7849                 return -ENOMEM;
7850
7851         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7852         if (!hdr) {
7853                 nlmsg_free(msg);
7854                 return -ENOMEM;
7855         }
7856
7857         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7858             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7859             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
7860             (sig_dbm &&
7861              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
7862             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7863                 goto nla_put_failure;
7864
7865         genlmsg_end(msg, hdr);
7866
7867         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7868
7869  nla_put_failure:
7870         genlmsg_cancel(msg, hdr);
7871         nlmsg_free(msg);
7872         return -ENOBUFS;
7873 }
7874
7875 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7876                                  struct net_device *netdev, u64 cookie,
7877                                  const u8 *buf, size_t len, bool ack,
7878                                  gfp_t gfp)
7879 {
7880         struct sk_buff *msg;
7881         void *hdr;
7882
7883         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7884         if (!msg)
7885                 return;
7886
7887         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7888         if (!hdr) {
7889                 nlmsg_free(msg);
7890                 return;
7891         }
7892
7893         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7894             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7895             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
7896             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
7897             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
7898                 goto nla_put_failure;
7899
7900         genlmsg_end(msg, hdr);
7901
7902         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7903         return;
7904
7905  nla_put_failure:
7906         genlmsg_cancel(msg, hdr);
7907         nlmsg_free(msg);
7908 }
7909
7910 void
7911 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7912                              struct net_device *netdev,
7913                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7914                              gfp_t gfp)
7915 {
7916         struct sk_buff *msg;
7917         struct nlattr *pinfoattr;
7918         void *hdr;
7919
7920         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7921         if (!msg)
7922                 return;
7923
7924         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7925         if (!hdr) {
7926                 nlmsg_free(msg);
7927                 return;
7928         }
7929
7930         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7931             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7932                 goto nla_put_failure;
7933
7934         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7935         if (!pinfoattr)
7936                 goto nla_put_failure;
7937
7938         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7939                         rssi_event))
7940                 goto nla_put_failure;
7941
7942         nla_nest_end(msg, pinfoattr);
7943
7944         genlmsg_end(msg, hdr);
7945
7946         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7947                                 nl80211_mlme_mcgrp.id, gfp);
7948         return;
7949
7950  nla_put_failure:
7951         genlmsg_cancel(msg, hdr);
7952         nlmsg_free(msg);
7953 }
7954
7955 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7956                               struct net_device *netdev, const u8 *bssid,
7957                               const u8 *replay_ctr, gfp_t gfp)
7958 {
7959         struct sk_buff *msg;
7960         struct nlattr *rekey_attr;
7961         void *hdr;
7962
7963         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7964         if (!msg)
7965                 return;
7966
7967         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7968         if (!hdr) {
7969                 nlmsg_free(msg);
7970                 return;
7971         }
7972
7973         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7974             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7975             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7976                 goto nla_put_failure;
7977
7978         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7979         if (!rekey_attr)
7980                 goto nla_put_failure;
7981
7982         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7983                     NL80211_REPLAY_CTR_LEN, replay_ctr))
7984                 goto nla_put_failure;
7985
7986         nla_nest_end(msg, rekey_attr);
7987
7988         genlmsg_end(msg, hdr);
7989
7990         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7991                                 nl80211_mlme_mcgrp.id, gfp);
7992         return;
7993
7994  nla_put_failure:
7995         genlmsg_cancel(msg, hdr);
7996         nlmsg_free(msg);
7997 }
7998
7999 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8000                                     struct net_device *netdev, int index,
8001                                     const u8 *bssid, bool preauth, gfp_t gfp)
8002 {
8003         struct sk_buff *msg;
8004         struct nlattr *attr;
8005         void *hdr;
8006
8007         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8008         if (!msg)
8009                 return;
8010
8011         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8012         if (!hdr) {
8013                 nlmsg_free(msg);
8014                 return;
8015         }
8016
8017         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8018             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8019                 goto nla_put_failure;
8020
8021         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8022         if (!attr)
8023                 goto nla_put_failure;
8024
8025         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8026             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8027             (preauth &&
8028              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8029                 goto nla_put_failure;
8030
8031         nla_nest_end(msg, attr);
8032
8033         genlmsg_end(msg, hdr);
8034
8035         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8036                                 nl80211_mlme_mcgrp.id, gfp);
8037         return;
8038
8039  nla_put_failure:
8040         genlmsg_cancel(msg, hdr);
8041         nlmsg_free(msg);
8042 }
8043
8044 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8045                               struct net_device *netdev, int freq,
8046                               enum nl80211_channel_type type, gfp_t gfp)
8047 {
8048         struct sk_buff *msg;
8049         void *hdr;
8050
8051         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8052         if (!msg)
8053                 return;
8054
8055         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8056         if (!hdr) {
8057                 nlmsg_free(msg);
8058                 return;
8059         }
8060
8061         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8062             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8063             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8064                 goto nla_put_failure;
8065
8066         genlmsg_end(msg, hdr);
8067
8068         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8069                                 nl80211_mlme_mcgrp.id, gfp);
8070         return;
8071
8072  nla_put_failure:
8073         genlmsg_cancel(msg, hdr);
8074         nlmsg_free(msg);
8075 }
8076
8077 void
8078 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8079                                 struct net_device *netdev, const u8 *peer,
8080                                 u32 num_packets, gfp_t gfp)
8081 {
8082         struct sk_buff *msg;
8083         struct nlattr *pinfoattr;
8084         void *hdr;
8085
8086         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8087         if (!msg)
8088                 return;
8089
8090         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8091         if (!hdr) {
8092                 nlmsg_free(msg);
8093                 return;
8094         }
8095
8096         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8097             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8098             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8099                 goto nla_put_failure;
8100
8101         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8102         if (!pinfoattr)
8103                 goto nla_put_failure;
8104
8105         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8106                 goto nla_put_failure;
8107
8108         nla_nest_end(msg, pinfoattr);
8109
8110         genlmsg_end(msg, hdr);
8111
8112         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8113                                 nl80211_mlme_mcgrp.id, gfp);
8114         return;
8115
8116  nla_put_failure:
8117         genlmsg_cancel(msg, hdr);
8118         nlmsg_free(msg);
8119 }
8120
8121 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8122                            u64 cookie, bool acked, gfp_t gfp)
8123 {
8124         struct wireless_dev *wdev = dev->ieee80211_ptr;
8125         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8126         struct sk_buff *msg;
8127         void *hdr;
8128         int err;
8129
8130         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8131         if (!msg)
8132                 return;
8133
8134         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8135         if (!hdr) {
8136                 nlmsg_free(msg);
8137                 return;
8138         }
8139
8140         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8141             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8142             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8143             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8144             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8145                 goto nla_put_failure;
8146
8147         err = genlmsg_end(msg, hdr);
8148         if (err < 0) {
8149                 nlmsg_free(msg);
8150                 return;
8151         }
8152
8153         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8154                                 nl80211_mlme_mcgrp.id, gfp);
8155         return;
8156
8157  nla_put_failure:
8158         genlmsg_cancel(msg, hdr);
8159         nlmsg_free(msg);
8160 }
8161 EXPORT_SYMBOL(cfg80211_probe_status);
8162
8163 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8164                                  const u8 *frame, size_t len,
8165                                  int freq, int sig_dbm, gfp_t gfp)
8166 {
8167         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8168         struct sk_buff *msg;
8169         void *hdr;
8170         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8171
8172         if (!nlpid)
8173                 return;
8174
8175         msg = nlmsg_new(len + 100, gfp);
8176         if (!msg)
8177                 return;
8178
8179         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8180         if (!hdr) {
8181                 nlmsg_free(msg);
8182                 return;
8183         }
8184
8185         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8186             (freq &&
8187              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8188             (sig_dbm &&
8189              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8190             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8191                 goto nla_put_failure;
8192
8193         genlmsg_end(msg, hdr);
8194
8195         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8196         return;
8197
8198  nla_put_failure:
8199         genlmsg_cancel(msg, hdr);
8200         nlmsg_free(msg);
8201 }
8202 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8203
8204 static int nl80211_netlink_notify(struct notifier_block * nb,
8205                                   unsigned long state,
8206                                   void *_notify)
8207 {
8208         struct netlink_notify *notify = _notify;
8209         struct cfg80211_registered_device *rdev;
8210         struct wireless_dev *wdev;
8211
8212         if (state != NETLINK_URELEASE)
8213                 return NOTIFY_DONE;
8214
8215         rcu_read_lock();
8216
8217         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8218                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8219                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8220                 if (rdev->ap_beacons_nlpid == notify->pid)
8221                         rdev->ap_beacons_nlpid = 0;
8222         }
8223
8224         rcu_read_unlock();
8225
8226         return NOTIFY_DONE;
8227 }
8228
8229 static struct notifier_block nl80211_netlink_notifier = {
8230         .notifier_call = nl80211_netlink_notify,
8231 };
8232
8233 /* initialisation/exit functions */
8234
8235 int nl80211_init(void)
8236 {
8237         int err;
8238
8239         err = genl_register_family_with_ops(&nl80211_fam,
8240                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8241         if (err)
8242                 return err;
8243
8244         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8245         if (err)
8246                 goto err_out;
8247
8248         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8249         if (err)
8250                 goto err_out;
8251
8252         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8253         if (err)
8254                 goto err_out;
8255
8256         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8257         if (err)
8258                 goto err_out;
8259
8260 #ifdef CONFIG_NL80211_TESTMODE
8261         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8262         if (err)
8263                 goto err_out;
8264 #endif
8265
8266         err = netlink_register_notifier(&nl80211_netlink_notifier);
8267         if (err)
8268                 goto err_out;
8269
8270         return 0;
8271  err_out:
8272         genl_unregister_family(&nl80211_fam);
8273         return err;
8274 }
8275
8276 void nl80211_exit(void)
8277 {
8278         netlink_unregister_notifier(&nl80211_netlink_notifier);
8279         genl_unregister_family(&nl80211_fam);
8280 }