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         if (rdev->ops->get_channel) {
1544                 struct ieee80211_channel *chan;
1545                 enum nl80211_channel_type channel_type;
1546
1547                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1548                 if (chan &&
1549                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1550                                     chan->center_freq) ||
1551                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1552                                     channel_type)))
1553                         goto nla_put_failure;
1554         }
1555
1556         return genlmsg_end(msg, hdr);
1557
1558  nla_put_failure:
1559         genlmsg_cancel(msg, hdr);
1560         return -EMSGSIZE;
1561 }
1562
1563 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1564 {
1565         int wp_idx = 0;
1566         int if_idx = 0;
1567         int wp_start = cb->args[0];
1568         int if_start = cb->args[1];
1569         struct cfg80211_registered_device *rdev;
1570         struct wireless_dev *wdev;
1571
1572         mutex_lock(&cfg80211_mutex);
1573         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1574                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1575                         continue;
1576                 if (wp_idx < wp_start) {
1577                         wp_idx++;
1578                         continue;
1579                 }
1580                 if_idx = 0;
1581
1582                 mutex_lock(&rdev->devlist_mtx);
1583                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1584                         if (if_idx < if_start) {
1585                                 if_idx++;
1586                                 continue;
1587                         }
1588                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1589                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1590                                                rdev, wdev->netdev) < 0) {
1591                                 mutex_unlock(&rdev->devlist_mtx);
1592                                 goto out;
1593                         }
1594                         if_idx++;
1595                 }
1596                 mutex_unlock(&rdev->devlist_mtx);
1597
1598                 wp_idx++;
1599         }
1600  out:
1601         mutex_unlock(&cfg80211_mutex);
1602
1603         cb->args[0] = wp_idx;
1604         cb->args[1] = if_idx;
1605
1606         return skb->len;
1607 }
1608
1609 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1610 {
1611         struct sk_buff *msg;
1612         struct cfg80211_registered_device *dev = info->user_ptr[0];
1613         struct net_device *netdev = info->user_ptr[1];
1614
1615         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1616         if (!msg)
1617                 return -ENOMEM;
1618
1619         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1620                                dev, netdev) < 0) {
1621                 nlmsg_free(msg);
1622                 return -ENOBUFS;
1623         }
1624
1625         return genlmsg_reply(msg, info);
1626 }
1627
1628 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1629         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1630         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1631         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1632         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1633         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1634 };
1635
1636 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1637 {
1638         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1639         int flag;
1640
1641         *mntrflags = 0;
1642
1643         if (!nla)
1644                 return -EINVAL;
1645
1646         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1647                              nla, mntr_flags_policy))
1648                 return -EINVAL;
1649
1650         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1651                 if (flags[flag])
1652                         *mntrflags |= (1<<flag);
1653
1654         return 0;
1655 }
1656
1657 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1658                                struct net_device *netdev, u8 use_4addr,
1659                                enum nl80211_iftype iftype)
1660 {
1661         if (!use_4addr) {
1662                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1663                         return -EBUSY;
1664                 return 0;
1665         }
1666
1667         switch (iftype) {
1668         case NL80211_IFTYPE_AP_VLAN:
1669                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1670                         return 0;
1671                 break;
1672         case NL80211_IFTYPE_STATION:
1673                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1674                         return 0;
1675                 break;
1676         default:
1677                 break;
1678         }
1679
1680         return -EOPNOTSUPP;
1681 }
1682
1683 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1684 {
1685         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1686         struct vif_params params;
1687         int err;
1688         enum nl80211_iftype otype, ntype;
1689         struct net_device *dev = info->user_ptr[1];
1690         u32 _flags, *flags = NULL;
1691         bool change = false;
1692
1693         memset(&params, 0, sizeof(params));
1694
1695         otype = ntype = dev->ieee80211_ptr->iftype;
1696
1697         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1698                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1699                 if (otype != ntype)
1700                         change = true;
1701                 if (ntype > NL80211_IFTYPE_MAX)
1702                         return -EINVAL;
1703         }
1704
1705         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1706                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1707
1708                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1709                         return -EINVAL;
1710                 if (netif_running(dev))
1711                         return -EBUSY;
1712
1713                 wdev_lock(wdev);
1714                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1715                              IEEE80211_MAX_MESH_ID_LEN);
1716                 wdev->mesh_id_up_len =
1717                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1718                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1719                        wdev->mesh_id_up_len);
1720                 wdev_unlock(wdev);
1721         }
1722
1723         if (info->attrs[NL80211_ATTR_4ADDR]) {
1724                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1725                 change = true;
1726                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1727                 if (err)
1728                         return err;
1729         } else {
1730                 params.use_4addr = -1;
1731         }
1732
1733         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1734                 if (ntype != NL80211_IFTYPE_MONITOR)
1735                         return -EINVAL;
1736                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1737                                           &_flags);
1738                 if (err)
1739                         return err;
1740
1741                 flags = &_flags;
1742                 change = true;
1743         }
1744
1745         if (change)
1746                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1747         else
1748                 err = 0;
1749
1750         if (!err && params.use_4addr != -1)
1751                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1752
1753         return err;
1754 }
1755
1756 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1757 {
1758         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1759         struct vif_params params;
1760         struct net_device *dev;
1761         int err;
1762         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1763         u32 flags;
1764
1765         memset(&params, 0, sizeof(params));
1766
1767         if (!info->attrs[NL80211_ATTR_IFNAME])
1768                 return -EINVAL;
1769
1770         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1771                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1772                 if (type > NL80211_IFTYPE_MAX)
1773                         return -EINVAL;
1774         }
1775
1776         if (!rdev->ops->add_virtual_intf ||
1777             !(rdev->wiphy.interface_modes & (1 << type)))
1778                 return -EOPNOTSUPP;
1779
1780         if (info->attrs[NL80211_ATTR_4ADDR]) {
1781                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1782                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1783                 if (err)
1784                         return err;
1785         }
1786
1787         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1788                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1789                                   &flags);
1790         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1791                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1792                 type, err ? NULL : &flags, &params);
1793         if (IS_ERR(dev))
1794                 return PTR_ERR(dev);
1795
1796         if (type == NL80211_IFTYPE_MESH_POINT &&
1797             info->attrs[NL80211_ATTR_MESH_ID]) {
1798                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1799
1800                 wdev_lock(wdev);
1801                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1802                              IEEE80211_MAX_MESH_ID_LEN);
1803                 wdev->mesh_id_up_len =
1804                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1805                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1806                        wdev->mesh_id_up_len);
1807                 wdev_unlock(wdev);
1808         }
1809
1810         return 0;
1811 }
1812
1813 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1814 {
1815         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1816         struct net_device *dev = info->user_ptr[1];
1817
1818         if (!rdev->ops->del_virtual_intf)
1819                 return -EOPNOTSUPP;
1820
1821         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1822 }
1823
1824 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1825 {
1826         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1827         struct net_device *dev = info->user_ptr[1];
1828         u16 noack_map;
1829
1830         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1831                 return -EINVAL;
1832
1833         if (!rdev->ops->set_noack_map)
1834                 return -EOPNOTSUPP;
1835
1836         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1837
1838         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1839 }
1840
1841 struct get_key_cookie {
1842         struct sk_buff *msg;
1843         int error;
1844         int idx;
1845 };
1846
1847 static void get_key_callback(void *c, struct key_params *params)
1848 {
1849         struct nlattr *key;
1850         struct get_key_cookie *cookie = c;
1851
1852         if ((params->key &&
1853              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1854                      params->key_len, params->key)) ||
1855             (params->seq &&
1856              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1857                      params->seq_len, params->seq)) ||
1858             (params->cipher &&
1859              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1860                          params->cipher)))
1861                 goto nla_put_failure;
1862
1863         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1864         if (!key)
1865                 goto nla_put_failure;
1866
1867         if ((params->key &&
1868              nla_put(cookie->msg, NL80211_KEY_DATA,
1869                      params->key_len, params->key)) ||
1870             (params->seq &&
1871              nla_put(cookie->msg, NL80211_KEY_SEQ,
1872                      params->seq_len, params->seq)) ||
1873             (params->cipher &&
1874              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
1875                          params->cipher)))
1876                 goto nla_put_failure;
1877
1878         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
1879                 goto nla_put_failure;
1880
1881         nla_nest_end(cookie->msg, key);
1882
1883         return;
1884  nla_put_failure:
1885         cookie->error = 1;
1886 }
1887
1888 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1889 {
1890         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1891         int err;
1892         struct net_device *dev = info->user_ptr[1];
1893         u8 key_idx = 0;
1894         const u8 *mac_addr = NULL;
1895         bool pairwise;
1896         struct get_key_cookie cookie = {
1897                 .error = 0,
1898         };
1899         void *hdr;
1900         struct sk_buff *msg;
1901
1902         if (info->attrs[NL80211_ATTR_KEY_IDX])
1903                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1904
1905         if (key_idx > 5)
1906                 return -EINVAL;
1907
1908         if (info->attrs[NL80211_ATTR_MAC])
1909                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1910
1911         pairwise = !!mac_addr;
1912         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1913                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1914                 if (kt >= NUM_NL80211_KEYTYPES)
1915                         return -EINVAL;
1916                 if (kt != NL80211_KEYTYPE_GROUP &&
1917                     kt != NL80211_KEYTYPE_PAIRWISE)
1918                         return -EINVAL;
1919                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1920         }
1921
1922         if (!rdev->ops->get_key)
1923                 return -EOPNOTSUPP;
1924
1925         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1926         if (!msg)
1927                 return -ENOMEM;
1928
1929         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1930                              NL80211_CMD_NEW_KEY);
1931         if (IS_ERR(hdr))
1932                 return PTR_ERR(hdr);
1933
1934         cookie.msg = msg;
1935         cookie.idx = key_idx;
1936
1937         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1938             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
1939                 goto nla_put_failure;
1940         if (mac_addr &&
1941             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
1942                 goto nla_put_failure;
1943
1944         if (pairwise && mac_addr &&
1945             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1946                 return -ENOENT;
1947
1948         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1949                                  mac_addr, &cookie, get_key_callback);
1950
1951         if (err)
1952                 goto free_msg;
1953
1954         if (cookie.error)
1955                 goto nla_put_failure;
1956
1957         genlmsg_end(msg, hdr);
1958         return genlmsg_reply(msg, info);
1959
1960  nla_put_failure:
1961         err = -ENOBUFS;
1962  free_msg:
1963         nlmsg_free(msg);
1964         return err;
1965 }
1966
1967 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1968 {
1969         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1970         struct key_parse key;
1971         int err;
1972         struct net_device *dev = info->user_ptr[1];
1973
1974         err = nl80211_parse_key(info, &key);
1975         if (err)
1976                 return err;
1977
1978         if (key.idx < 0)
1979                 return -EINVAL;
1980
1981         /* only support setting default key */
1982         if (!key.def && !key.defmgmt)
1983                 return -EINVAL;
1984
1985         wdev_lock(dev->ieee80211_ptr);
1986
1987         if (key.def) {
1988                 if (!rdev->ops->set_default_key) {
1989                         err = -EOPNOTSUPP;
1990                         goto out;
1991                 }
1992
1993                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1994                 if (err)
1995                         goto out;
1996
1997                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1998                                                  key.def_uni, key.def_multi);
1999
2000                 if (err)
2001                         goto out;
2002
2003 #ifdef CONFIG_CFG80211_WEXT
2004                 dev->ieee80211_ptr->wext.default_key = key.idx;
2005 #endif
2006         } else {
2007                 if (key.def_uni || !key.def_multi) {
2008                         err = -EINVAL;
2009                         goto out;
2010                 }
2011
2012                 if (!rdev->ops->set_default_mgmt_key) {
2013                         err = -EOPNOTSUPP;
2014                         goto out;
2015                 }
2016
2017                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2018                 if (err)
2019                         goto out;
2020
2021                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2022                                                       dev, key.idx);
2023                 if (err)
2024                         goto out;
2025
2026 #ifdef CONFIG_CFG80211_WEXT
2027                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2028 #endif
2029         }
2030
2031  out:
2032         wdev_unlock(dev->ieee80211_ptr);
2033
2034         return err;
2035 }
2036
2037 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2038 {
2039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2040         int err;
2041         struct net_device *dev = info->user_ptr[1];
2042         struct key_parse key;
2043         const u8 *mac_addr = NULL;
2044
2045         err = nl80211_parse_key(info, &key);
2046         if (err)
2047                 return err;
2048
2049         if (!key.p.key)
2050                 return -EINVAL;
2051
2052         if (info->attrs[NL80211_ATTR_MAC])
2053                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2054
2055         if (key.type == -1) {
2056                 if (mac_addr)
2057                         key.type = NL80211_KEYTYPE_PAIRWISE;
2058                 else
2059                         key.type = NL80211_KEYTYPE_GROUP;
2060         }
2061
2062         /* for now */
2063         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2064             key.type != NL80211_KEYTYPE_GROUP)
2065                 return -EINVAL;
2066
2067         if (!rdev->ops->add_key)
2068                 return -EOPNOTSUPP;
2069
2070         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2071                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2072                                            mac_addr))
2073                 return -EINVAL;
2074
2075         wdev_lock(dev->ieee80211_ptr);
2076         err = nl80211_key_allowed(dev->ieee80211_ptr);
2077         if (!err)
2078                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2079                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2080                                          mac_addr, &key.p);
2081         wdev_unlock(dev->ieee80211_ptr);
2082
2083         return err;
2084 }
2085
2086 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2087 {
2088         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2089         int err;
2090         struct net_device *dev = info->user_ptr[1];
2091         u8 *mac_addr = NULL;
2092         struct key_parse key;
2093
2094         err = nl80211_parse_key(info, &key);
2095         if (err)
2096                 return err;
2097
2098         if (info->attrs[NL80211_ATTR_MAC])
2099                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2100
2101         if (key.type == -1) {
2102                 if (mac_addr)
2103                         key.type = NL80211_KEYTYPE_PAIRWISE;
2104                 else
2105                         key.type = NL80211_KEYTYPE_GROUP;
2106         }
2107
2108         /* for now */
2109         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2110             key.type != NL80211_KEYTYPE_GROUP)
2111                 return -EINVAL;
2112
2113         if (!rdev->ops->del_key)
2114                 return -EOPNOTSUPP;
2115
2116         wdev_lock(dev->ieee80211_ptr);
2117         err = nl80211_key_allowed(dev->ieee80211_ptr);
2118
2119         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2120             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2121                 err = -ENOENT;
2122
2123         if (!err)
2124                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2125                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2126                                          mac_addr);
2127
2128 #ifdef CONFIG_CFG80211_WEXT
2129         if (!err) {
2130                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2131                         dev->ieee80211_ptr->wext.default_key = -1;
2132                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2133                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2134         }
2135 #endif
2136         wdev_unlock(dev->ieee80211_ptr);
2137
2138         return err;
2139 }
2140
2141 static int nl80211_parse_beacon(struct genl_info *info,
2142                                 struct cfg80211_beacon_data *bcn)
2143 {
2144         bool haveinfo = false;
2145
2146         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2147             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2148             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2149             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2150                 return -EINVAL;
2151
2152         memset(bcn, 0, sizeof(*bcn));
2153
2154         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2155                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2156                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2157                 if (!bcn->head_len)
2158                         return -EINVAL;
2159                 haveinfo = true;
2160         }
2161
2162         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2163                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2164                 bcn->tail_len =
2165                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2166                 haveinfo = true;
2167         }
2168
2169         if (!haveinfo)
2170                 return -EINVAL;
2171
2172         if (info->attrs[NL80211_ATTR_IE]) {
2173                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2174                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2175         }
2176
2177         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2178                 bcn->proberesp_ies =
2179                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2180                 bcn->proberesp_ies_len =
2181                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2182         }
2183
2184         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2185                 bcn->assocresp_ies =
2186                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2187                 bcn->assocresp_ies_len =
2188                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2189         }
2190
2191         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2192                 bcn->probe_resp =
2193                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2194                 bcn->probe_resp_len =
2195                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2196         }
2197
2198         return 0;
2199 }
2200
2201 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2202 {
2203         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2204         struct net_device *dev = info->user_ptr[1];
2205         struct wireless_dev *wdev = dev->ieee80211_ptr;
2206         struct cfg80211_ap_settings params;
2207         int err;
2208
2209         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2210             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2211                 return -EOPNOTSUPP;
2212
2213         if (!rdev->ops->start_ap)
2214                 return -EOPNOTSUPP;
2215
2216         if (wdev->beacon_interval)
2217                 return -EALREADY;
2218
2219         memset(&params, 0, sizeof(params));
2220
2221         /* these are required for START_AP */
2222         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2223             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2224             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2225                 return -EINVAL;
2226
2227         err = nl80211_parse_beacon(info, &params.beacon);
2228         if (err)
2229                 return err;
2230
2231         params.beacon_interval =
2232                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2233         params.dtim_period =
2234                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2235
2236         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2237         if (err)
2238                 return err;
2239
2240         /*
2241          * In theory, some of these attributes should be required here
2242          * but since they were not used when the command was originally
2243          * added, keep them optional for old user space programs to let
2244          * them continue to work with drivers that do not need the
2245          * additional information -- drivers must check!
2246          */
2247         if (info->attrs[NL80211_ATTR_SSID]) {
2248                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2249                 params.ssid_len =
2250                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2251                 if (params.ssid_len == 0 ||
2252                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2253                         return -EINVAL;
2254         }
2255
2256         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2257                 params.hidden_ssid = nla_get_u32(
2258                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2259                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2260                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2261                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2262                         return -EINVAL;
2263         }
2264
2265         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2266
2267         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2268                 params.auth_type = nla_get_u32(
2269                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2270                 if (!nl80211_valid_auth_type(params.auth_type))
2271                         return -EINVAL;
2272         } else
2273                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2274
2275         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2276                                       NL80211_MAX_NR_CIPHER_SUITES);
2277         if (err)
2278                 return err;
2279
2280         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2281                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2282                         return -EOPNOTSUPP;
2283                 params.inactivity_timeout = nla_get_u16(
2284                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2285         }
2286
2287         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2288         if (!err)
2289                 wdev->beacon_interval = params.beacon_interval;
2290         return err;
2291 }
2292
2293 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2294 {
2295         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2296         struct net_device *dev = info->user_ptr[1];
2297         struct wireless_dev *wdev = dev->ieee80211_ptr;
2298         struct cfg80211_beacon_data params;
2299         int err;
2300
2301         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2303                 return -EOPNOTSUPP;
2304
2305         if (!rdev->ops->change_beacon)
2306                 return -EOPNOTSUPP;
2307
2308         if (!wdev->beacon_interval)
2309                 return -EINVAL;
2310
2311         err = nl80211_parse_beacon(info, &params);
2312         if (err)
2313                 return err;
2314
2315         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2316 }
2317
2318 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2319 {
2320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2321         struct net_device *dev = info->user_ptr[1];
2322         struct wireless_dev *wdev = dev->ieee80211_ptr;
2323         int err;
2324
2325         if (!rdev->ops->stop_ap)
2326                 return -EOPNOTSUPP;
2327
2328         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2329             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2330                 return -EOPNOTSUPP;
2331
2332         if (!wdev->beacon_interval)
2333                 return -ENOENT;
2334
2335         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2336         if (!err)
2337                 wdev->beacon_interval = 0;
2338         return err;
2339 }
2340
2341 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2342         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2343         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2344         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2345         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2346         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2347         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2348 };
2349
2350 static int parse_station_flags(struct genl_info *info,
2351                                enum nl80211_iftype iftype,
2352                                struct station_parameters *params)
2353 {
2354         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2355         struct nlattr *nla;
2356         int flag;
2357
2358         /*
2359          * Try parsing the new attribute first so userspace
2360          * can specify both for older kernels.
2361          */
2362         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2363         if (nla) {
2364                 struct nl80211_sta_flag_update *sta_flags;
2365
2366                 sta_flags = nla_data(nla);
2367                 params->sta_flags_mask = sta_flags->mask;
2368                 params->sta_flags_set = sta_flags->set;
2369                 if ((params->sta_flags_mask |
2370                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2371                         return -EINVAL;
2372                 return 0;
2373         }
2374
2375         /* if present, parse the old attribute */
2376
2377         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2378         if (!nla)
2379                 return 0;
2380
2381         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2382                              nla, sta_flags_policy))
2383                 return -EINVAL;
2384
2385         /*
2386          * Only allow certain flags for interface types so that
2387          * other attributes are silently ignored. Remember that
2388          * this is backward compatibility code with old userspace
2389          * and shouldn't be hit in other cases anyway.
2390          */
2391         switch (iftype) {
2392         case NL80211_IFTYPE_AP:
2393         case NL80211_IFTYPE_AP_VLAN:
2394         case NL80211_IFTYPE_P2P_GO:
2395                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2396                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2397                                          BIT(NL80211_STA_FLAG_WME) |
2398                                          BIT(NL80211_STA_FLAG_MFP);
2399                 break;
2400         case NL80211_IFTYPE_P2P_CLIENT:
2401         case NL80211_IFTYPE_STATION:
2402                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2403                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2404                 break;
2405         case NL80211_IFTYPE_MESH_POINT:
2406                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2407                                          BIT(NL80211_STA_FLAG_MFP) |
2408                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2409         default:
2410                 return -EINVAL;
2411         }
2412
2413         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2414                 if (flags[flag])
2415                         params->sta_flags_set |= (1<<flag);
2416
2417         return 0;
2418 }
2419
2420 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2421                                  int attr)
2422 {
2423         struct nlattr *rate;
2424         u16 bitrate;
2425
2426         rate = nla_nest_start(msg, attr);
2427         if (!rate)
2428                 goto nla_put_failure;
2429
2430         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2431         bitrate = cfg80211_calculate_bitrate(info);
2432         if ((bitrate > 0 &&
2433              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2434             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2435              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2436             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2437              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2438             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2439              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2440                 goto nla_put_failure;
2441
2442         nla_nest_end(msg, rate);
2443         return true;
2444
2445 nla_put_failure:
2446         return false;
2447 }
2448
2449 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2450                                 int flags,
2451                                 struct cfg80211_registered_device *rdev,
2452                                 struct net_device *dev,
2453                                 const u8 *mac_addr, struct station_info *sinfo)
2454 {
2455         void *hdr;
2456         struct nlattr *sinfoattr, *bss_param;
2457
2458         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2459         if (!hdr)
2460                 return -1;
2461
2462         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2463             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2464             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2465                 goto nla_put_failure;
2466
2467         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2468         if (!sinfoattr)
2469                 goto nla_put_failure;
2470         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2471             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2472                         sinfo->connected_time))
2473                 goto nla_put_failure;
2474         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2475             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2476                         sinfo->inactive_time))
2477                 goto nla_put_failure;
2478         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2479             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2480                         sinfo->rx_bytes))
2481                 goto nla_put_failure;
2482         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2483             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2484                         sinfo->tx_bytes))
2485                 goto nla_put_failure;
2486         if ((sinfo->filled & STATION_INFO_LLID) &&
2487             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2488                 goto nla_put_failure;
2489         if ((sinfo->filled & STATION_INFO_PLID) &&
2490             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2491                 goto nla_put_failure;
2492         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2493             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2494                        sinfo->plink_state))
2495                 goto nla_put_failure;
2496         switch (rdev->wiphy.signal_type) {
2497         case CFG80211_SIGNAL_TYPE_MBM:
2498                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2499                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2500                                sinfo->signal))
2501                         goto nla_put_failure;
2502                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2503                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2504                                sinfo->signal_avg))
2505                         goto nla_put_failure;
2506                 break;
2507         default:
2508                 break;
2509         }
2510         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2511                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2512                                           NL80211_STA_INFO_TX_BITRATE))
2513                         goto nla_put_failure;
2514         }
2515         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2516                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2517                                           NL80211_STA_INFO_RX_BITRATE))
2518                         goto nla_put_failure;
2519         }
2520         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2521             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2522                         sinfo->rx_packets))
2523                 goto nla_put_failure;
2524         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2525             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2526                         sinfo->tx_packets))
2527                 goto nla_put_failure;
2528         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2529             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2530                         sinfo->tx_retries))
2531                 goto nla_put_failure;
2532         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2533             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2534                         sinfo->tx_failed))
2535                 goto nla_put_failure;
2536         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2537             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2538                         sinfo->beacon_loss_count))
2539                 goto nla_put_failure;
2540         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2541                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2542                 if (!bss_param)
2543                         goto nla_put_failure;
2544
2545                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2546                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2547                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2548                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2549                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2550                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2551                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2552                                sinfo->bss_param.dtim_period) ||
2553                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2554                                 sinfo->bss_param.beacon_interval))
2555                         goto nla_put_failure;
2556
2557                 nla_nest_end(msg, bss_param);
2558         }
2559         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2560             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2561                     sizeof(struct nl80211_sta_flag_update),
2562                     &sinfo->sta_flags))
2563                 goto nla_put_failure;
2564         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2565                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2566                             sinfo->t_offset))
2567                 goto nla_put_failure;
2568         nla_nest_end(msg, sinfoattr);
2569
2570         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2571             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2572                     sinfo->assoc_req_ies))
2573                 goto nla_put_failure;
2574
2575         return genlmsg_end(msg, hdr);
2576
2577  nla_put_failure:
2578         genlmsg_cancel(msg, hdr);
2579         return -EMSGSIZE;
2580 }
2581
2582 static int nl80211_dump_station(struct sk_buff *skb,
2583                                 struct netlink_callback *cb)
2584 {
2585         struct station_info sinfo;
2586         struct cfg80211_registered_device *dev;
2587         struct net_device *netdev;
2588         u8 mac_addr[ETH_ALEN];
2589         int sta_idx = cb->args[1];
2590         int err;
2591
2592         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2593         if (err)
2594                 return err;
2595
2596         if (!dev->ops->dump_station) {
2597                 err = -EOPNOTSUPP;
2598                 goto out_err;
2599         }
2600
2601         while (1) {
2602                 memset(&sinfo, 0, sizeof(sinfo));
2603                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2604                                              mac_addr, &sinfo);
2605                 if (err == -ENOENT)
2606                         break;
2607                 if (err)
2608                         goto out_err;
2609
2610                 if (nl80211_send_station(skb,
2611                                 NETLINK_CB(cb->skb).pid,
2612                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2613                                 dev, netdev, mac_addr,
2614                                 &sinfo) < 0)
2615                         goto out;
2616
2617                 sta_idx++;
2618         }
2619
2620
2621  out:
2622         cb->args[1] = sta_idx;
2623         err = skb->len;
2624  out_err:
2625         nl80211_finish_netdev_dump(dev);
2626
2627         return err;
2628 }
2629
2630 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2631 {
2632         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2633         struct net_device *dev = info->user_ptr[1];
2634         struct station_info sinfo;
2635         struct sk_buff *msg;
2636         u8 *mac_addr = NULL;
2637         int err;
2638
2639         memset(&sinfo, 0, sizeof(sinfo));
2640
2641         if (!info->attrs[NL80211_ATTR_MAC])
2642                 return -EINVAL;
2643
2644         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2645
2646         if (!rdev->ops->get_station)
2647                 return -EOPNOTSUPP;
2648
2649         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2650         if (err)
2651                 return err;
2652
2653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2654         if (!msg)
2655                 return -ENOMEM;
2656
2657         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2658                                  rdev, dev, mac_addr, &sinfo) < 0) {
2659                 nlmsg_free(msg);
2660                 return -ENOBUFS;
2661         }
2662
2663         return genlmsg_reply(msg, info);
2664 }
2665
2666 /*
2667  * Get vlan interface making sure it is running and on the right wiphy.
2668  */
2669 static struct net_device *get_vlan(struct genl_info *info,
2670                                    struct cfg80211_registered_device *rdev)
2671 {
2672         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2673         struct net_device *v;
2674         int ret;
2675
2676         if (!vlanattr)
2677                 return NULL;
2678
2679         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2680         if (!v)
2681                 return ERR_PTR(-ENODEV);
2682
2683         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2684                 ret = -EINVAL;
2685                 goto error;
2686         }
2687
2688         if (!netif_running(v)) {
2689                 ret = -ENETDOWN;
2690                 goto error;
2691         }
2692
2693         return v;
2694  error:
2695         dev_put(v);
2696         return ERR_PTR(ret);
2697 }
2698
2699 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2700 {
2701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2702         int err;
2703         struct net_device *dev = info->user_ptr[1];
2704         struct station_parameters params;
2705         u8 *mac_addr = NULL;
2706
2707         memset(&params, 0, sizeof(params));
2708
2709         params.listen_interval = -1;
2710         params.plink_state = -1;
2711
2712         if (info->attrs[NL80211_ATTR_STA_AID])
2713                 return -EINVAL;
2714
2715         if (!info->attrs[NL80211_ATTR_MAC])
2716                 return -EINVAL;
2717
2718         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2719
2720         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2721                 params.supported_rates =
2722                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2723                 params.supported_rates_len =
2724                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2725         }
2726
2727         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2728                 params.listen_interval =
2729                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2730
2731         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2732                 params.ht_capa =
2733                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2734
2735         if (!rdev->ops->change_station)
2736                 return -EOPNOTSUPP;
2737
2738         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2739                 return -EINVAL;
2740
2741         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2742                 params.plink_action =
2743                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2744
2745         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2746                 params.plink_state =
2747                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2748
2749         switch (dev->ieee80211_ptr->iftype) {
2750         case NL80211_IFTYPE_AP:
2751         case NL80211_IFTYPE_AP_VLAN:
2752         case NL80211_IFTYPE_P2P_GO:
2753                 /* disallow mesh-specific things */
2754                 if (params.plink_action)
2755                         return -EINVAL;
2756
2757                 /* TDLS can't be set, ... */
2758                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2759                         return -EINVAL;
2760                 /*
2761                  * ... but don't bother the driver with it. This works around
2762                  * a hostapd/wpa_supplicant issue -- it always includes the
2763                  * TLDS_PEER flag in the mask even for AP mode.
2764                  */
2765                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2766
2767                 /* accept only the listed bits */
2768                 if (params.sta_flags_mask &
2769                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2770                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2771                                   BIT(NL80211_STA_FLAG_WME) |
2772                                   BIT(NL80211_STA_FLAG_MFP)))
2773                         return -EINVAL;
2774
2775                 /* must be last in here for error handling */
2776                 params.vlan = get_vlan(info, rdev);
2777                 if (IS_ERR(params.vlan))
2778                         return PTR_ERR(params.vlan);
2779                 break;
2780         case NL80211_IFTYPE_P2P_CLIENT:
2781         case NL80211_IFTYPE_STATION:
2782                 /*
2783                  * Don't allow userspace to change the TDLS_PEER flag,
2784                  * but silently ignore attempts to change it since we
2785                  * don't have state here to verify that it doesn't try
2786                  * to change the flag.
2787                  */
2788                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2789                 /* fall through */
2790         case NL80211_IFTYPE_ADHOC:
2791                 /* disallow things sta doesn't support */
2792                 if (params.plink_action)
2793                         return -EINVAL;
2794                 if (params.ht_capa)
2795                         return -EINVAL;
2796                 if (params.listen_interval >= 0)
2797                         return -EINVAL;
2798                 /* reject any changes other than AUTHORIZED */
2799                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2800                         return -EINVAL;
2801                 break;
2802         case NL80211_IFTYPE_MESH_POINT:
2803                 /* disallow things mesh doesn't support */
2804                 if (params.vlan)
2805                         return -EINVAL;
2806                 if (params.ht_capa)
2807                         return -EINVAL;
2808                 if (params.listen_interval >= 0)
2809                         return -EINVAL;
2810                 /*
2811                  * No special handling for TDLS here -- the userspace
2812                  * mesh code doesn't have this bug.
2813                  */
2814                 if (params.sta_flags_mask &
2815                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2816                                   BIT(NL80211_STA_FLAG_MFP) |
2817                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2818                         return -EINVAL;
2819                 break;
2820         default:
2821                 return -EOPNOTSUPP;
2822         }
2823
2824         /* be aware of params.vlan when changing code here */
2825
2826         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2827
2828         if (params.vlan)
2829                 dev_put(params.vlan);
2830
2831         return err;
2832 }
2833
2834 static struct nla_policy
2835 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2836         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2837         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2838 };
2839
2840 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2841 {
2842         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2843         int err;
2844         struct net_device *dev = info->user_ptr[1];
2845         struct station_parameters params;
2846         u8 *mac_addr = NULL;
2847
2848         memset(&params, 0, sizeof(params));
2849
2850         if (!info->attrs[NL80211_ATTR_MAC])
2851                 return -EINVAL;
2852
2853         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2854                 return -EINVAL;
2855
2856         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2857                 return -EINVAL;
2858
2859         if (!info->attrs[NL80211_ATTR_STA_AID])
2860                 return -EINVAL;
2861
2862         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2863         params.supported_rates =
2864                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2865         params.supported_rates_len =
2866                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2867         params.listen_interval =
2868                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2869
2870         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2871         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2872                 return -EINVAL;
2873
2874         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2875                 params.ht_capa =
2876                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2877
2878         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2879                 params.plink_action =
2880                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2881
2882         if (!rdev->ops->add_station)
2883                 return -EOPNOTSUPP;
2884
2885         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2886                 return -EINVAL;
2887
2888         switch (dev->ieee80211_ptr->iftype) {
2889         case NL80211_IFTYPE_AP:
2890         case NL80211_IFTYPE_AP_VLAN:
2891         case NL80211_IFTYPE_P2P_GO:
2892                 /* parse WME attributes if sta is WME capable */
2893                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2894                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2895                     info->attrs[NL80211_ATTR_STA_WME]) {
2896                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2897                         struct nlattr *nla;
2898
2899                         nla = info->attrs[NL80211_ATTR_STA_WME];
2900                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2901                                                nl80211_sta_wme_policy);
2902                         if (err)
2903                                 return err;
2904
2905                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2906                                 params.uapsd_queues =
2907                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2908                         if (params.uapsd_queues &
2909                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2910                                 return -EINVAL;
2911
2912                         if (tb[NL80211_STA_WME_MAX_SP])
2913                                 params.max_sp =
2914                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2915
2916                         if (params.max_sp &
2917                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2918                                 return -EINVAL;
2919
2920                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2921                 }
2922                 /* TDLS peers cannot be added */
2923                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2924                         return -EINVAL;
2925                 /* but don't bother the driver with it */
2926                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2927
2928                 /* must be last in here for error handling */
2929                 params.vlan = get_vlan(info, rdev);
2930                 if (IS_ERR(params.vlan))
2931                         return PTR_ERR(params.vlan);
2932                 break;
2933         case NL80211_IFTYPE_MESH_POINT:
2934                 /* TDLS peers cannot be added */
2935                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2936                         return -EINVAL;
2937                 break;
2938         case NL80211_IFTYPE_STATION:
2939                 /* Only TDLS peers can be added */
2940                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2941                         return -EINVAL;
2942                 /* Can only add if TDLS ... */
2943                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2944                         return -EOPNOTSUPP;
2945                 /* ... with external setup is supported */
2946                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2947                         return -EOPNOTSUPP;
2948                 break;
2949         default:
2950                 return -EOPNOTSUPP;
2951         }
2952
2953         /* be aware of params.vlan when changing code here */
2954
2955         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2956
2957         if (params.vlan)
2958                 dev_put(params.vlan);
2959         return err;
2960 }
2961
2962 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2963 {
2964         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2965         struct net_device *dev = info->user_ptr[1];
2966         u8 *mac_addr = NULL;
2967
2968         if (info->attrs[NL80211_ATTR_MAC])
2969                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2970
2971         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2972             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2973             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2974             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2975                 return -EINVAL;
2976
2977         if (!rdev->ops->del_station)
2978                 return -EOPNOTSUPP;
2979
2980         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2981 }
2982
2983 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2984                                 int flags, struct net_device *dev,
2985                                 u8 *dst, u8 *next_hop,
2986                                 struct mpath_info *pinfo)
2987 {
2988         void *hdr;
2989         struct nlattr *pinfoattr;
2990
2991         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2992         if (!hdr)
2993                 return -1;
2994
2995         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2996             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
2997             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
2998             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
2999                 goto nla_put_failure;
3000
3001         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3002         if (!pinfoattr)
3003                 goto nla_put_failure;
3004         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3005             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3006                         pinfo->frame_qlen))
3007                 goto nla_put_failure;
3008         if (((pinfo->filled & MPATH_INFO_SN) &&
3009              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3010             ((pinfo->filled & MPATH_INFO_METRIC) &&
3011              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3012                          pinfo->metric)) ||
3013             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3014              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3015                          pinfo->exptime)) ||
3016             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3017              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3018                         pinfo->flags)) ||
3019             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3020              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3021                          pinfo->discovery_timeout)) ||
3022             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3023              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3024                         pinfo->discovery_retries)))
3025                 goto nla_put_failure;
3026
3027         nla_nest_end(msg, pinfoattr);
3028
3029         return genlmsg_end(msg, hdr);
3030
3031  nla_put_failure:
3032         genlmsg_cancel(msg, hdr);
3033         return -EMSGSIZE;
3034 }
3035
3036 static int nl80211_dump_mpath(struct sk_buff *skb,
3037                               struct netlink_callback *cb)
3038 {
3039         struct mpath_info pinfo;
3040         struct cfg80211_registered_device *dev;
3041         struct net_device *netdev;
3042         u8 dst[ETH_ALEN];
3043         u8 next_hop[ETH_ALEN];
3044         int path_idx = cb->args[1];
3045         int err;
3046
3047         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3048         if (err)
3049                 return err;
3050
3051         if (!dev->ops->dump_mpath) {
3052                 err = -EOPNOTSUPP;
3053                 goto out_err;
3054         }
3055
3056         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3057                 err = -EOPNOTSUPP;
3058                 goto out_err;
3059         }
3060
3061         while (1) {
3062                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3063                                            dst, next_hop, &pinfo);
3064                 if (err == -ENOENT)
3065                         break;
3066                 if (err)
3067                         goto out_err;
3068
3069                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3070                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3071                                        netdev, dst, next_hop,
3072                                        &pinfo) < 0)
3073                         goto out;
3074
3075                 path_idx++;
3076         }
3077
3078
3079  out:
3080         cb->args[1] = path_idx;
3081         err = skb->len;
3082  out_err:
3083         nl80211_finish_netdev_dump(dev);
3084         return err;
3085 }
3086
3087 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3088 {
3089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3090         int err;
3091         struct net_device *dev = info->user_ptr[1];
3092         struct mpath_info pinfo;
3093         struct sk_buff *msg;
3094         u8 *dst = NULL;
3095         u8 next_hop[ETH_ALEN];
3096
3097         memset(&pinfo, 0, sizeof(pinfo));
3098
3099         if (!info->attrs[NL80211_ATTR_MAC])
3100                 return -EINVAL;
3101
3102         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3103
3104         if (!rdev->ops->get_mpath)
3105                 return -EOPNOTSUPP;
3106
3107         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3108                 return -EOPNOTSUPP;
3109
3110         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3111         if (err)
3112                 return err;
3113
3114         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3115         if (!msg)
3116                 return -ENOMEM;
3117
3118         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3119                                  dev, dst, next_hop, &pinfo) < 0) {
3120                 nlmsg_free(msg);
3121                 return -ENOBUFS;
3122         }
3123
3124         return genlmsg_reply(msg, info);
3125 }
3126
3127 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3128 {
3129         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3130         struct net_device *dev = info->user_ptr[1];
3131         u8 *dst = NULL;
3132         u8 *next_hop = NULL;
3133
3134         if (!info->attrs[NL80211_ATTR_MAC])
3135                 return -EINVAL;
3136
3137         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3138                 return -EINVAL;
3139
3140         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3141         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3142
3143         if (!rdev->ops->change_mpath)
3144                 return -EOPNOTSUPP;
3145
3146         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3147                 return -EOPNOTSUPP;
3148
3149         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3150 }
3151
3152 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3153 {
3154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3155         struct net_device *dev = info->user_ptr[1];
3156         u8 *dst = NULL;
3157         u8 *next_hop = NULL;
3158
3159         if (!info->attrs[NL80211_ATTR_MAC])
3160                 return -EINVAL;
3161
3162         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3163                 return -EINVAL;
3164
3165         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3166         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3167
3168         if (!rdev->ops->add_mpath)
3169                 return -EOPNOTSUPP;
3170
3171         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3172                 return -EOPNOTSUPP;
3173
3174         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3175 }
3176
3177 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3178 {
3179         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3180         struct net_device *dev = info->user_ptr[1];
3181         u8 *dst = NULL;
3182
3183         if (info->attrs[NL80211_ATTR_MAC])
3184                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3185
3186         if (!rdev->ops->del_mpath)
3187                 return -EOPNOTSUPP;
3188
3189         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3190 }
3191
3192 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3193 {
3194         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3195         struct net_device *dev = info->user_ptr[1];
3196         struct bss_parameters params;
3197
3198         memset(&params, 0, sizeof(params));
3199         /* default to not changing parameters */
3200         params.use_cts_prot = -1;
3201         params.use_short_preamble = -1;
3202         params.use_short_slot_time = -1;
3203         params.ap_isolate = -1;
3204         params.ht_opmode = -1;
3205
3206         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3207                 params.use_cts_prot =
3208                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3209         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3210                 params.use_short_preamble =
3211                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3212         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3213                 params.use_short_slot_time =
3214                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3215         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3216                 params.basic_rates =
3217                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3218                 params.basic_rates_len =
3219                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3220         }
3221         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3222                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3223         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3224                 params.ht_opmode =
3225                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3226
3227         if (!rdev->ops->change_bss)
3228                 return -EOPNOTSUPP;
3229
3230         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3231             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3232                 return -EOPNOTSUPP;
3233
3234         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3235 }
3236
3237 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3238         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3239         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3240         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3241         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3242         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3243         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3244 };
3245
3246 static int parse_reg_rule(struct nlattr *tb[],
3247         struct ieee80211_reg_rule *reg_rule)
3248 {
3249         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3250         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3251
3252         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3253                 return -EINVAL;
3254         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3255                 return -EINVAL;
3256         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3257                 return -EINVAL;
3258         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3259                 return -EINVAL;
3260         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3261                 return -EINVAL;
3262
3263         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3264
3265         freq_range->start_freq_khz =
3266                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3267         freq_range->end_freq_khz =
3268                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3269         freq_range->max_bandwidth_khz =
3270                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3271
3272         power_rule->max_eirp =
3273                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3274
3275         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3276                 power_rule->max_antenna_gain =
3277                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3278
3279         return 0;
3280 }
3281
3282 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3283 {
3284         int r;
3285         char *data = NULL;
3286
3287         /*
3288          * You should only get this when cfg80211 hasn't yet initialized
3289          * completely when built-in to the kernel right between the time
3290          * window between nl80211_init() and regulatory_init(), if that is
3291          * even possible.
3292          */
3293         mutex_lock(&cfg80211_mutex);
3294         if (unlikely(!cfg80211_regdomain)) {
3295                 mutex_unlock(&cfg80211_mutex);
3296                 return -EINPROGRESS;
3297         }
3298         mutex_unlock(&cfg80211_mutex);
3299
3300         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3301                 return -EINVAL;
3302
3303         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3304
3305         r = regulatory_hint_user(data);
3306
3307         return r;
3308 }
3309
3310 static int nl80211_get_mesh_config(struct sk_buff *skb,
3311                                    struct genl_info *info)
3312 {
3313         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3314         struct net_device *dev = info->user_ptr[1];
3315         struct wireless_dev *wdev = dev->ieee80211_ptr;
3316         struct mesh_config cur_params;
3317         int err = 0;
3318         void *hdr;
3319         struct nlattr *pinfoattr;
3320         struct sk_buff *msg;
3321
3322         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3323                 return -EOPNOTSUPP;
3324
3325         if (!rdev->ops->get_mesh_config)
3326                 return -EOPNOTSUPP;
3327
3328         wdev_lock(wdev);
3329         /* If not connected, get default parameters */
3330         if (!wdev->mesh_id_len)
3331                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3332         else
3333                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3334                                                  &cur_params);
3335         wdev_unlock(wdev);
3336
3337         if (err)
3338                 return err;
3339
3340         /* Draw up a netlink message to send back */
3341         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3342         if (!msg)
3343                 return -ENOMEM;
3344         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3345                              NL80211_CMD_GET_MESH_CONFIG);
3346         if (!hdr)
3347                 goto out;
3348         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3349         if (!pinfoattr)
3350                 goto nla_put_failure;
3351         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3352             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3353                         cur_params.dot11MeshRetryTimeout) ||
3354             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3355                         cur_params.dot11MeshConfirmTimeout) ||
3356             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3357                         cur_params.dot11MeshHoldingTimeout) ||
3358             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3359                         cur_params.dot11MeshMaxPeerLinks) ||
3360             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3361                        cur_params.dot11MeshMaxRetries) ||
3362             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3363                        cur_params.dot11MeshTTL) ||
3364             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3365                        cur_params.element_ttl) ||
3366             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3367                        cur_params.auto_open_plinks) ||
3368             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3369                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3370             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3371                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3372             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3373                         cur_params.path_refresh_time) ||
3374             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3375                         cur_params.min_discovery_timeout) ||
3376             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3377                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3378             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3379                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3380             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3381                         cur_params.dot11MeshHWMPperrMinInterval) ||
3382             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3383                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3384             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3385                        cur_params.dot11MeshHWMPRootMode) ||
3386             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3387                         cur_params.dot11MeshHWMPRannInterval) ||
3388             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3389                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3390             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3391                        cur_params.dot11MeshForwarding) ||
3392             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3393                         cur_params.rssi_threshold) ||
3394             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3395                         cur_params.ht_opmode))
3396                 goto nla_put_failure;
3397         nla_nest_end(msg, pinfoattr);
3398         genlmsg_end(msg, hdr);
3399         return genlmsg_reply(msg, info);
3400
3401  nla_put_failure:
3402         genlmsg_cancel(msg, hdr);
3403  out:
3404         nlmsg_free(msg);
3405         return -ENOBUFS;
3406 }
3407
3408 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3409         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3410         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3411         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3412         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3413         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3414         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3415         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3416         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3417         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3418
3419         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3420         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3421         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3422         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3423         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3424         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3425         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3426         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3427         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3428         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3429         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3430         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3431         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16},
3432 };
3433
3434 static const struct nla_policy
3435         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3436         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3437         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3438         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3439         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3440         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3441                 .len = IEEE80211_MAX_DATA_LEN },
3442         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3443 };
3444
3445 static int nl80211_parse_mesh_config(struct genl_info *info,
3446                                      struct mesh_config *cfg,
3447                                      u32 *mask_out)
3448 {
3449         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3450         u32 mask = 0;
3451
3452 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3453 do {\
3454         if (table[attr_num]) {\
3455                 cfg->param = nla_fn(table[attr_num]); \
3456                 mask |= (1 << (attr_num - 1)); \
3457         } \
3458 } while (0);\
3459
3460
3461         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3462                 return -EINVAL;
3463         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3464                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3465                              nl80211_meshconf_params_policy))
3466                 return -EINVAL;
3467
3468         /* This makes sure that there aren't more than 32 mesh config
3469          * parameters (otherwise our bitfield scheme would not work.) */
3470         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3471
3472         /* Fill in the params struct */
3473         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3474                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3475         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3476                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3477         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3478                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3479         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3480                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3481         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3482                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3483         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3484                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3485         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3486                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3487         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3488                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3489         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
3490                         mask, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3491                         nla_get_u32);
3492         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3493                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3494                         nla_get_u8);
3495         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3496                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3497         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3498                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3499                         nla_get_u16);
3500         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3501                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3502                         nla_get_u32);
3503         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3504                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3505                         nla_get_u16);
3506         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3507                         mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3508                         nla_get_u16);
3509         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3510                         dot11MeshHWMPnetDiameterTraversalTime,
3511                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3512                         nla_get_u16);
3513         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3514                         dot11MeshHWMPRootMode, mask,
3515                         NL80211_MESHCONF_HWMP_ROOTMODE,
3516                         nla_get_u8);
3517         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3518                         dot11MeshHWMPRannInterval, mask,
3519                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3520                         nla_get_u16);
3521         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3522                         dot11MeshGateAnnouncementProtocol, mask,
3523                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3524                         nla_get_u8);
3525         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3526                         mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3527         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3528                         mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3529         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3530                         mask, NL80211_MESHCONF_HT_OPMODE, nla_get_u16);
3531         if (mask_out)
3532                 *mask_out = mask;
3533
3534         return 0;
3535
3536 #undef FILL_IN_MESH_PARAM_IF_SET
3537 }
3538
3539 static int nl80211_parse_mesh_setup(struct genl_info *info,
3540                                      struct mesh_setup *setup)
3541 {
3542         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3543
3544         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3545                 return -EINVAL;
3546         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3547                              info->attrs[NL80211_ATTR_MESH_SETUP],
3548                              nl80211_mesh_setup_params_policy))
3549                 return -EINVAL;
3550
3551         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3552                 setup->sync_method =
3553                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3554                  IEEE80211_SYNC_METHOD_VENDOR :
3555                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3556
3557         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3558                 setup->path_sel_proto =
3559                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3560                  IEEE80211_PATH_PROTOCOL_VENDOR :
3561                  IEEE80211_PATH_PROTOCOL_HWMP;
3562
3563         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3564                 setup->path_metric =
3565                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3566                  IEEE80211_PATH_METRIC_VENDOR :
3567                  IEEE80211_PATH_METRIC_AIRTIME;
3568
3569
3570         if (tb[NL80211_MESH_SETUP_IE]) {
3571                 struct nlattr *ieattr =
3572                         tb[NL80211_MESH_SETUP_IE];
3573                 if (!is_valid_ie_attr(ieattr))
3574                         return -EINVAL;
3575                 setup->ie = nla_data(ieattr);
3576                 setup->ie_len = nla_len(ieattr);
3577         }
3578         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3579         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3580
3581         return 0;
3582 }
3583
3584 static int nl80211_update_mesh_config(struct sk_buff *skb,
3585                                       struct genl_info *info)
3586 {
3587         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3588         struct net_device *dev = info->user_ptr[1];
3589         struct wireless_dev *wdev = dev->ieee80211_ptr;
3590         struct mesh_config cfg;
3591         u32 mask;
3592         int err;
3593
3594         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3595                 return -EOPNOTSUPP;
3596
3597         if (!rdev->ops->update_mesh_config)
3598                 return -EOPNOTSUPP;
3599
3600         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3601         if (err)
3602                 return err;
3603
3604         wdev_lock(wdev);
3605         if (!wdev->mesh_id_len)
3606                 err = -ENOLINK;
3607
3608         if (!err)
3609                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3610                                                     mask, &cfg);
3611
3612         wdev_unlock(wdev);
3613
3614         return err;
3615 }
3616
3617 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3618 {
3619         struct sk_buff *msg;
3620         void *hdr = NULL;
3621         struct nlattr *nl_reg_rules;
3622         unsigned int i;
3623         int err = -EINVAL;
3624
3625         mutex_lock(&cfg80211_mutex);
3626
3627         if (!cfg80211_regdomain)
3628                 goto out;
3629
3630         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3631         if (!msg) {
3632                 err = -ENOBUFS;
3633                 goto out;
3634         }
3635
3636         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3637                              NL80211_CMD_GET_REG);
3638         if (!hdr)
3639                 goto put_failure;
3640
3641         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3642                            cfg80211_regdomain->alpha2) ||
3643             (cfg80211_regdomain->dfs_region &&
3644              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3645                         cfg80211_regdomain->dfs_region)))
3646                 goto nla_put_failure;
3647
3648         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3649         if (!nl_reg_rules)
3650                 goto nla_put_failure;
3651
3652         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3653                 struct nlattr *nl_reg_rule;
3654                 const struct ieee80211_reg_rule *reg_rule;
3655                 const struct ieee80211_freq_range *freq_range;
3656                 const struct ieee80211_power_rule *power_rule;
3657
3658                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3659                 freq_range = &reg_rule->freq_range;
3660                 power_rule = &reg_rule->power_rule;
3661
3662                 nl_reg_rule = nla_nest_start(msg, i);
3663                 if (!nl_reg_rule)
3664                         goto nla_put_failure;
3665
3666                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3667                                 reg_rule->flags) ||
3668                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3669                                 freq_range->start_freq_khz) ||
3670                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3671                                 freq_range->end_freq_khz) ||
3672                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3673                                 freq_range->max_bandwidth_khz) ||
3674                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3675                                 power_rule->max_antenna_gain) ||
3676                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3677                                 power_rule->max_eirp))
3678                         goto nla_put_failure;
3679
3680                 nla_nest_end(msg, nl_reg_rule);
3681         }
3682
3683         nla_nest_end(msg, nl_reg_rules);
3684
3685         genlmsg_end(msg, hdr);
3686         err = genlmsg_reply(msg, info);
3687         goto out;
3688
3689 nla_put_failure:
3690         genlmsg_cancel(msg, hdr);
3691 put_failure:
3692         nlmsg_free(msg);
3693         err = -EMSGSIZE;
3694 out:
3695         mutex_unlock(&cfg80211_mutex);
3696         return err;
3697 }
3698
3699 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3700 {
3701         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3702         struct nlattr *nl_reg_rule;
3703         char *alpha2 = NULL;
3704         int rem_reg_rules = 0, r = 0;
3705         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3706         u8 dfs_region = 0;
3707         struct ieee80211_regdomain *rd = NULL;
3708
3709         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3710                 return -EINVAL;
3711
3712         if (!info->attrs[NL80211_ATTR_REG_RULES])
3713                 return -EINVAL;
3714
3715         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3716
3717         if (info->attrs[NL80211_ATTR_DFS_REGION])
3718                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3719
3720         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3721                         rem_reg_rules) {
3722                 num_rules++;
3723                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3724                         return -EINVAL;
3725         }
3726
3727         mutex_lock(&cfg80211_mutex);
3728
3729         if (!reg_is_valid_request(alpha2)) {
3730                 r = -EINVAL;
3731                 goto bad_reg;
3732         }
3733
3734         size_of_regd = sizeof(struct ieee80211_regdomain) +
3735                 (num_rules * sizeof(struct ieee80211_reg_rule));
3736
3737         rd = kzalloc(size_of_regd, GFP_KERNEL);
3738         if (!rd) {
3739                 r = -ENOMEM;
3740                 goto bad_reg;
3741         }
3742
3743         rd->n_reg_rules = num_rules;
3744         rd->alpha2[0] = alpha2[0];
3745         rd->alpha2[1] = alpha2[1];
3746
3747         /*
3748          * Disable DFS master mode if the DFS region was
3749          * not supported or known on this kernel.
3750          */
3751         if (reg_supported_dfs_region(dfs_region))
3752                 rd->dfs_region = dfs_region;
3753
3754         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3755                         rem_reg_rules) {
3756                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3757                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3758                         reg_rule_policy);
3759                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3760                 if (r)
3761                         goto bad_reg;
3762
3763                 rule_idx++;
3764
3765                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3766                         r = -EINVAL;
3767                         goto bad_reg;
3768                 }
3769         }
3770
3771         BUG_ON(rule_idx != num_rules);
3772
3773         r = set_regdom(rd);
3774
3775         mutex_unlock(&cfg80211_mutex);
3776
3777         return r;
3778
3779  bad_reg:
3780         mutex_unlock(&cfg80211_mutex);
3781         kfree(rd);
3782         return r;
3783 }
3784
3785 static int validate_scan_freqs(struct nlattr *freqs)
3786 {
3787         struct nlattr *attr1, *attr2;
3788         int n_channels = 0, tmp1, tmp2;
3789
3790         nla_for_each_nested(attr1, freqs, tmp1) {
3791                 n_channels++;
3792                 /*
3793                  * Some hardware has a limited channel list for
3794                  * scanning, and it is pretty much nonsensical
3795                  * to scan for a channel twice, so disallow that
3796                  * and don't require drivers to check that the
3797                  * channel list they get isn't longer than what
3798                  * they can scan, as long as they can scan all
3799                  * the channels they registered at once.
3800                  */
3801                 nla_for_each_nested(attr2, freqs, tmp2)
3802                         if (attr1 != attr2 &&
3803                             nla_get_u32(attr1) == nla_get_u32(attr2))
3804                                 return 0;
3805         }
3806
3807         return n_channels;
3808 }
3809
3810 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3811 {
3812         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3813         struct net_device *dev = info->user_ptr[1];
3814         struct cfg80211_scan_request *request;
3815         struct nlattr *attr;
3816         struct wiphy *wiphy;
3817         int err, tmp, n_ssids = 0, n_channels, i;
3818         size_t ie_len;
3819
3820         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3821                 return -EINVAL;
3822
3823         wiphy = &rdev->wiphy;
3824
3825         if (!rdev->ops->scan)
3826                 return -EOPNOTSUPP;
3827
3828         if (rdev->scan_req)
3829                 return -EBUSY;
3830
3831         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3832                 n_channels = validate_scan_freqs(
3833                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3834                 if (!n_channels)
3835                         return -EINVAL;
3836         } else {
3837                 enum ieee80211_band band;
3838                 n_channels = 0;
3839
3840                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3841                         if (wiphy->bands[band])
3842                                 n_channels += wiphy->bands[band]->n_channels;
3843         }
3844
3845         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3846                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3847                         n_ssids++;
3848
3849         if (n_ssids > wiphy->max_scan_ssids)
3850                 return -EINVAL;
3851
3852         if (info->attrs[NL80211_ATTR_IE])
3853                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3854         else
3855                 ie_len = 0;
3856
3857         if (ie_len > wiphy->max_scan_ie_len)
3858                 return -EINVAL;
3859
3860         request = kzalloc(sizeof(*request)
3861                         + sizeof(*request->ssids) * n_ssids
3862                         + sizeof(*request->channels) * n_channels
3863                         + ie_len, GFP_KERNEL);
3864         if (!request)
3865                 return -ENOMEM;
3866
3867         if (n_ssids)
3868                 request->ssids = (void *)&request->channels[n_channels];
3869         request->n_ssids = n_ssids;
3870         if (ie_len) {
3871                 if (request->ssids)
3872                         request->ie = (void *)(request->ssids + n_ssids);
3873                 else
3874                         request->ie = (void *)(request->channels + n_channels);
3875         }
3876
3877         i = 0;
3878         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3879                 /* user specified, bail out if channel not found */
3880                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3881                         struct ieee80211_channel *chan;
3882
3883                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3884
3885                         if (!chan) {
3886                                 err = -EINVAL;
3887                                 goto out_free;
3888                         }
3889
3890                         /* ignore disabled channels */
3891                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3892                                 continue;
3893
3894                         request->channels[i] = chan;
3895                         i++;
3896                 }
3897         } else {
3898                 enum ieee80211_band band;
3899
3900                 /* all channels */
3901                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3902                         int j;
3903                         if (!wiphy->bands[band])
3904                                 continue;
3905                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3906                                 struct ieee80211_channel *chan;
3907
3908                                 chan = &wiphy->bands[band]->channels[j];
3909
3910                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3911                                         continue;
3912
3913                                 request->channels[i] = chan;
3914                                 i++;
3915                         }
3916                 }
3917         }
3918
3919         if (!i) {
3920                 err = -EINVAL;
3921                 goto out_free;
3922         }
3923
3924         request->n_channels = i;
3925
3926         i = 0;
3927         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3928                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3929                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3930                                 err = -EINVAL;
3931                                 goto out_free;
3932                         }
3933                         request->ssids[i].ssid_len = nla_len(attr);
3934                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3935                         i++;
3936                 }
3937         }
3938
3939         if (info->attrs[NL80211_ATTR_IE]) {
3940                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3941                 memcpy((void *)request->ie,
3942                        nla_data(info->attrs[NL80211_ATTR_IE]),
3943                        request->ie_len);
3944         }
3945
3946         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3947                 if (wiphy->bands[i])
3948                         request->rates[i] =
3949                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3950
3951         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3952                 nla_for_each_nested(attr,
3953                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3954                                     tmp) {
3955                         enum ieee80211_band band = nla_type(attr);
3956
3957                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3958                                 err = -EINVAL;
3959                                 goto out_free;
3960                         }
3961                         err = ieee80211_get_ratemask(wiphy->bands[band],
3962                                                      nla_data(attr),
3963                                                      nla_len(attr),
3964                                                      &request->rates[band]);
3965                         if (err)
3966                                 goto out_free;
3967                 }
3968         }
3969
3970         request->no_cck =
3971                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3972
3973         request->dev = dev;
3974         request->wiphy = &rdev->wiphy;
3975
3976         rdev->scan_req = request;
3977         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3978
3979         if (!err) {
3980                 nl80211_send_scan_start(rdev, dev);
3981                 dev_hold(dev);
3982         } else {
3983  out_free:
3984                 rdev->scan_req = NULL;
3985                 kfree(request);
3986         }
3987
3988         return err;
3989 }
3990
3991 static int nl80211_start_sched_scan(struct sk_buff *skb,
3992                                     struct genl_info *info)
3993 {
3994         struct cfg80211_sched_scan_request *request;
3995         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3996         struct net_device *dev = info->user_ptr[1];
3997         struct nlattr *attr;
3998         struct wiphy *wiphy;
3999         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4000         u32 interval;
4001         enum ieee80211_band band;
4002         size_t ie_len;
4003         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4004
4005         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4006             !rdev->ops->sched_scan_start)
4007                 return -EOPNOTSUPP;
4008
4009         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4010                 return -EINVAL;
4011
4012         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4013                 return -EINVAL;
4014
4015         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4016         if (interval == 0)
4017                 return -EINVAL;
4018
4019         wiphy = &rdev->wiphy;
4020
4021         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4022                 n_channels = validate_scan_freqs(
4023                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4024                 if (!n_channels)
4025                         return -EINVAL;
4026         } else {
4027                 n_channels = 0;
4028
4029                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4030                         if (wiphy->bands[band])
4031                                 n_channels += wiphy->bands[band]->n_channels;
4032         }
4033
4034         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4035                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4036                                     tmp)
4037                         n_ssids++;
4038
4039         if (n_ssids > wiphy->max_sched_scan_ssids)
4040                 return -EINVAL;
4041
4042         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4043                 nla_for_each_nested(attr,
4044                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4045                                     tmp)
4046                         n_match_sets++;
4047
4048         if (n_match_sets > wiphy->max_match_sets)
4049                 return -EINVAL;
4050
4051         if (info->attrs[NL80211_ATTR_IE])
4052                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4053         else
4054                 ie_len = 0;
4055
4056         if (ie_len > wiphy->max_sched_scan_ie_len)
4057                 return -EINVAL;
4058
4059         mutex_lock(&rdev->sched_scan_mtx);
4060
4061         if (rdev->sched_scan_req) {
4062                 err = -EINPROGRESS;
4063                 goto out;
4064         }
4065
4066         request = kzalloc(sizeof(*request)
4067                         + sizeof(*request->ssids) * n_ssids
4068                         + sizeof(*request->match_sets) * n_match_sets
4069                         + sizeof(*request->channels) * n_channels
4070                         + ie_len, GFP_KERNEL);
4071         if (!request) {
4072                 err = -ENOMEM;
4073                 goto out;
4074         }
4075
4076         if (n_ssids)
4077                 request->ssids = (void *)&request->channels[n_channels];
4078         request->n_ssids = n_ssids;
4079         if (ie_len) {
4080                 if (request->ssids)
4081                         request->ie = (void *)(request->ssids + n_ssids);
4082                 else
4083                         request->ie = (void *)(request->channels + n_channels);
4084         }
4085
4086         if (n_match_sets) {
4087                 if (request->ie)
4088                         request->match_sets = (void *)(request->ie + ie_len);
4089                 else if (request->ssids)
4090                         request->match_sets =
4091                                 (void *)(request->ssids + n_ssids);
4092                 else
4093                         request->match_sets =
4094                                 (void *)(request->channels + n_channels);
4095         }
4096         request->n_match_sets = n_match_sets;
4097
4098         i = 0;
4099         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4100                 /* user specified, bail out if channel not found */
4101                 nla_for_each_nested(attr,
4102                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4103                                     tmp) {
4104                         struct ieee80211_channel *chan;
4105
4106                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4107
4108                         if (!chan) {
4109                                 err = -EINVAL;
4110                                 goto out_free;
4111                         }
4112
4113                         /* ignore disabled channels */
4114                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4115                                 continue;
4116
4117                         request->channels[i] = chan;
4118                         i++;
4119                 }
4120         } else {
4121                 /* all channels */
4122                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4123                         int j;
4124                         if (!wiphy->bands[band])
4125                                 continue;
4126                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4127                                 struct ieee80211_channel *chan;
4128
4129                                 chan = &wiphy->bands[band]->channels[j];
4130
4131                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4132                                         continue;
4133
4134                                 request->channels[i] = chan;
4135                                 i++;
4136                         }
4137                 }
4138         }
4139
4140         if (!i) {
4141                 err = -EINVAL;
4142                 goto out_free;
4143         }
4144
4145         request->n_channels = i;
4146
4147         i = 0;
4148         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4149                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4150                                     tmp) {
4151                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4152                                 err = -EINVAL;
4153                                 goto out_free;
4154                         }
4155                         request->ssids[i].ssid_len = nla_len(attr);
4156                         memcpy(request->ssids[i].ssid, nla_data(attr),
4157                                nla_len(attr));
4158                         i++;
4159                 }
4160         }
4161
4162         i = 0;
4163         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4164                 nla_for_each_nested(attr,
4165                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4166                                     tmp) {
4167                         struct nlattr *ssid;
4168
4169                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4170                                   nla_data(attr), nla_len(attr),
4171                                   nl80211_match_policy);
4172                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4173                         if (ssid) {
4174                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4175                                         err = -EINVAL;
4176                                         goto out_free;
4177                                 }
4178                                 memcpy(request->match_sets[i].ssid.ssid,
4179                                        nla_data(ssid), nla_len(ssid));
4180                                 request->match_sets[i].ssid.ssid_len =
4181                                         nla_len(ssid);
4182                         }
4183                         i++;
4184                 }
4185         }
4186
4187         if (info->attrs[NL80211_ATTR_IE]) {
4188                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4189                 memcpy((void *)request->ie,
4190                        nla_data(info->attrs[NL80211_ATTR_IE]),
4191                        request->ie_len);
4192         }
4193
4194         request->dev = dev;
4195         request->wiphy = &rdev->wiphy;
4196         request->interval = interval;
4197
4198         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4199         if (!err) {
4200                 rdev->sched_scan_req = request;
4201                 nl80211_send_sched_scan(rdev, dev,
4202                                         NL80211_CMD_START_SCHED_SCAN);
4203                 goto out;
4204         }
4205
4206 out_free:
4207         kfree(request);
4208 out:
4209         mutex_unlock(&rdev->sched_scan_mtx);
4210         return err;
4211 }
4212
4213 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4214                                    struct genl_info *info)
4215 {
4216         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4217         int err;
4218
4219         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4220             !rdev->ops->sched_scan_stop)
4221                 return -EOPNOTSUPP;
4222
4223         mutex_lock(&rdev->sched_scan_mtx);
4224         err = __cfg80211_stop_sched_scan(rdev, false);
4225         mutex_unlock(&rdev->sched_scan_mtx);
4226
4227         return err;
4228 }
4229
4230 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4231                             u32 seq, int flags,
4232                             struct cfg80211_registered_device *rdev,
4233                             struct wireless_dev *wdev,
4234                             struct cfg80211_internal_bss *intbss)
4235 {
4236         struct cfg80211_bss *res = &intbss->pub;
4237         void *hdr;
4238         struct nlattr *bss;
4239
4240         ASSERT_WDEV_LOCK(wdev);
4241
4242         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4243                              NL80211_CMD_NEW_SCAN_RESULTS);
4244         if (!hdr)
4245                 return -1;
4246
4247         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4248
4249         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4250             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4251                 goto nla_put_failure;
4252
4253         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4254         if (!bss)
4255                 goto nla_put_failure;
4256         if ((!is_zero_ether_addr(res->bssid) &&
4257              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4258             (res->information_elements && res->len_information_elements &&
4259              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4260                      res->len_information_elements,
4261                      res->information_elements)) ||
4262             (res->beacon_ies && res->len_beacon_ies &&
4263              res->beacon_ies != res->information_elements &&
4264              nla_put(msg, NL80211_BSS_BEACON_IES,
4265                      res->len_beacon_ies, res->beacon_ies)))
4266                 goto nla_put_failure;
4267         if (res->tsf &&
4268             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4269                 goto nla_put_failure;
4270         if (res->beacon_interval &&
4271             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4272                 goto nla_put_failure;
4273         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4274             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4275             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4276                         jiffies_to_msecs(jiffies - intbss->ts)))
4277                 goto nla_put_failure;
4278
4279         switch (rdev->wiphy.signal_type) {
4280         case CFG80211_SIGNAL_TYPE_MBM:
4281                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4282                         goto nla_put_failure;
4283                 break;
4284         case CFG80211_SIGNAL_TYPE_UNSPEC:
4285                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4286                         goto nla_put_failure;
4287                 break;
4288         default:
4289                 break;
4290         }
4291
4292         switch (wdev->iftype) {
4293         case NL80211_IFTYPE_P2P_CLIENT:
4294         case NL80211_IFTYPE_STATION:
4295                 if (intbss == wdev->current_bss &&
4296                     nla_put_u32(msg, NL80211_BSS_STATUS,
4297                                 NL80211_BSS_STATUS_ASSOCIATED))
4298                         goto nla_put_failure;
4299                 break;
4300         case NL80211_IFTYPE_ADHOC:
4301                 if (intbss == wdev->current_bss &&
4302                     nla_put_u32(msg, NL80211_BSS_STATUS,
4303                                 NL80211_BSS_STATUS_IBSS_JOINED))
4304                         goto nla_put_failure;
4305                 break;
4306         default:
4307                 break;
4308         }
4309
4310         nla_nest_end(msg, bss);
4311
4312         return genlmsg_end(msg, hdr);
4313
4314  nla_put_failure:
4315         genlmsg_cancel(msg, hdr);
4316         return -EMSGSIZE;
4317 }
4318
4319 static int nl80211_dump_scan(struct sk_buff *skb,
4320                              struct netlink_callback *cb)
4321 {
4322         struct cfg80211_registered_device *rdev;
4323         struct net_device *dev;
4324         struct cfg80211_internal_bss *scan;
4325         struct wireless_dev *wdev;
4326         int start = cb->args[1], idx = 0;
4327         int err;
4328
4329         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4330         if (err)
4331                 return err;
4332
4333         wdev = dev->ieee80211_ptr;
4334
4335         wdev_lock(wdev);
4336         spin_lock_bh(&rdev->bss_lock);
4337         cfg80211_bss_expire(rdev);
4338
4339         cb->seq = rdev->bss_generation;
4340
4341         list_for_each_entry(scan, &rdev->bss_list, list) {
4342                 if (++idx <= start)
4343                         continue;
4344                 if (nl80211_send_bss(skb, cb,
4345                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4346                                 rdev, wdev, scan) < 0) {
4347                         idx--;
4348                         break;
4349                 }
4350         }
4351
4352         spin_unlock_bh(&rdev->bss_lock);
4353         wdev_unlock(wdev);
4354
4355         cb->args[1] = idx;
4356         nl80211_finish_netdev_dump(rdev);
4357
4358         return skb->len;
4359 }
4360
4361 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4362                                 int flags, struct net_device *dev,
4363                                 struct survey_info *survey)
4364 {
4365         void *hdr;
4366         struct nlattr *infoattr;
4367
4368         hdr = nl80211hdr_put(msg, pid, seq, flags,
4369                              NL80211_CMD_NEW_SURVEY_RESULTS);
4370         if (!hdr)
4371                 return -ENOMEM;
4372
4373         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4374                 goto nla_put_failure;
4375
4376         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4377         if (!infoattr)
4378                 goto nla_put_failure;
4379
4380         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4381                         survey->channel->center_freq))
4382                 goto nla_put_failure;
4383
4384         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4385             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4386                 goto nla_put_failure;
4387         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4388             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4389                 goto nla_put_failure;
4390         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4391             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4392                         survey->channel_time))
4393                 goto nla_put_failure;
4394         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4395             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4396                         survey->channel_time_busy))
4397                 goto nla_put_failure;
4398         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4399             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4400                         survey->channel_time_ext_busy))
4401                 goto nla_put_failure;
4402         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4403             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4404                         survey->channel_time_rx))
4405                 goto nla_put_failure;
4406         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4407             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4408                         survey->channel_time_tx))
4409                 goto nla_put_failure;
4410
4411         nla_nest_end(msg, infoattr);
4412
4413         return genlmsg_end(msg, hdr);
4414
4415  nla_put_failure:
4416         genlmsg_cancel(msg, hdr);
4417         return -EMSGSIZE;
4418 }
4419
4420 static int nl80211_dump_survey(struct sk_buff *skb,
4421                         struct netlink_callback *cb)
4422 {
4423         struct survey_info survey;
4424         struct cfg80211_registered_device *dev;
4425         struct net_device *netdev;
4426         int survey_idx = cb->args[1];
4427         int res;
4428
4429         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4430         if (res)
4431                 return res;
4432
4433         if (!dev->ops->dump_survey) {
4434                 res = -EOPNOTSUPP;
4435                 goto out_err;
4436         }
4437
4438         while (1) {
4439                 struct ieee80211_channel *chan;
4440
4441                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4442                                             &survey);
4443                 if (res == -ENOENT)
4444                         break;
4445                 if (res)
4446                         goto out_err;
4447
4448                 /* Survey without a channel doesn't make sense */
4449                 if (!survey.channel) {
4450                         res = -EINVAL;
4451                         goto out;
4452                 }
4453
4454                 chan = ieee80211_get_channel(&dev->wiphy,
4455                                              survey.channel->center_freq);
4456                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4457                         survey_idx++;
4458                         continue;
4459                 }
4460
4461                 if (nl80211_send_survey(skb,
4462                                 NETLINK_CB(cb->skb).pid,
4463                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4464                                 netdev,
4465                                 &survey) < 0)
4466                         goto out;
4467                 survey_idx++;
4468         }
4469
4470  out:
4471         cb->args[1] = survey_idx;
4472         res = skb->len;
4473  out_err:
4474         nl80211_finish_netdev_dump(dev);
4475         return res;
4476 }
4477
4478 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4479 {
4480         return auth_type <= NL80211_AUTHTYPE_MAX;
4481 }
4482
4483 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4484 {
4485         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4486                                   NL80211_WPA_VERSION_2));
4487 }
4488
4489 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4490 {
4491         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4492         struct net_device *dev = info->user_ptr[1];
4493         struct ieee80211_channel *chan;
4494         const u8 *bssid, *ssid, *ie = NULL;
4495         int err, ssid_len, ie_len = 0;
4496         enum nl80211_auth_type auth_type;
4497         struct key_parse key;
4498         bool local_state_change;
4499
4500         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4501                 return -EINVAL;
4502
4503         if (!info->attrs[NL80211_ATTR_MAC])
4504                 return -EINVAL;
4505
4506         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4507                 return -EINVAL;
4508
4509         if (!info->attrs[NL80211_ATTR_SSID])
4510                 return -EINVAL;
4511
4512         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4513                 return -EINVAL;
4514
4515         err = nl80211_parse_key(info, &key);
4516         if (err)
4517                 return err;
4518
4519         if (key.idx >= 0) {
4520                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4521                         return -EINVAL;
4522                 if (!key.p.key || !key.p.key_len)
4523                         return -EINVAL;
4524                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4525                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4526                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4527                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4528                         return -EINVAL;
4529                 if (key.idx > 4)
4530                         return -EINVAL;
4531         } else {
4532                 key.p.key_len = 0;
4533                 key.p.key = NULL;
4534         }
4535
4536         if (key.idx >= 0) {
4537                 int i;
4538                 bool ok = false;
4539                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4540                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4541                                 ok = true;
4542                                 break;
4543                         }
4544                 }
4545                 if (!ok)
4546                         return -EINVAL;
4547         }
4548
4549         if (!rdev->ops->auth)
4550                 return -EOPNOTSUPP;
4551
4552         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4553             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4554                 return -EOPNOTSUPP;
4555
4556         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4557         chan = ieee80211_get_channel(&rdev->wiphy,
4558                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4559         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4560                 return -EINVAL;
4561
4562         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4563         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4564
4565         if (info->attrs[NL80211_ATTR_IE]) {
4566                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4567                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4568         }
4569
4570         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4571         if (!nl80211_valid_auth_type(auth_type))
4572                 return -EINVAL;
4573
4574         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4575
4576         /*
4577          * Since we no longer track auth state, ignore
4578          * requests to only change local state.
4579          */
4580         if (local_state_change)
4581                 return 0;
4582
4583         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4584                                   ssid, ssid_len, ie, ie_len,
4585                                   key.p.key, key.p.key_len, key.idx);
4586 }
4587
4588 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4589                                    struct genl_info *info,
4590                                    struct cfg80211_crypto_settings *settings,
4591                                    int cipher_limit)
4592 {
4593         memset(settings, 0, sizeof(*settings));
4594
4595         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4596
4597         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4598                 u16 proto;
4599                 proto = nla_get_u16(
4600                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4601                 settings->control_port_ethertype = cpu_to_be16(proto);
4602                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4603                     proto != ETH_P_PAE)
4604                         return -EINVAL;
4605                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4606                         settings->control_port_no_encrypt = true;
4607         } else
4608                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4609
4610         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4611                 void *data;
4612                 int len, i;
4613
4614                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4615                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4616                 settings->n_ciphers_pairwise = len / sizeof(u32);
4617
4618                 if (len % sizeof(u32))
4619                         return -EINVAL;
4620
4621                 if (settings->n_ciphers_pairwise > cipher_limit)
4622                         return -EINVAL;
4623
4624                 memcpy(settings->ciphers_pairwise, data, len);
4625
4626                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4627                         if (!cfg80211_supported_cipher_suite(
4628                                         &rdev->wiphy,
4629                                         settings->ciphers_pairwise[i]))
4630                                 return -EINVAL;
4631         }
4632
4633         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4634                 settings->cipher_group =
4635                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4636                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4637                                                      settings->cipher_group))
4638                         return -EINVAL;
4639         }
4640
4641         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4642                 settings->wpa_versions =
4643                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4644                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4645                         return -EINVAL;
4646         }
4647
4648         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4649                 void *data;
4650                 int len;
4651
4652                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4653                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4654                 settings->n_akm_suites = len / sizeof(u32);
4655
4656                 if (len % sizeof(u32))
4657                         return -EINVAL;
4658
4659                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4660                         return -EINVAL;
4661
4662                 memcpy(settings->akm_suites, data, len);
4663         }
4664
4665         return 0;
4666 }
4667
4668 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4669 {
4670         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4671         struct net_device *dev = info->user_ptr[1];
4672         struct cfg80211_crypto_settings crypto;
4673         struct ieee80211_channel *chan;
4674         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4675         int err, ssid_len, ie_len = 0;
4676         bool use_mfp = false;
4677         u32 flags = 0;
4678         struct ieee80211_ht_cap *ht_capa = NULL;
4679         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4680
4681         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4682                 return -EINVAL;
4683
4684         if (!info->attrs[NL80211_ATTR_MAC] ||
4685             !info->attrs[NL80211_ATTR_SSID] ||
4686             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4687                 return -EINVAL;
4688
4689         if (!rdev->ops->assoc)
4690                 return -EOPNOTSUPP;
4691
4692         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4693             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4694                 return -EOPNOTSUPP;
4695
4696         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4697
4698         chan = ieee80211_get_channel(&rdev->wiphy,
4699                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4700         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4701                 return -EINVAL;
4702
4703         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4704         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4705
4706         if (info->attrs[NL80211_ATTR_IE]) {
4707                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4708                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4709         }
4710
4711         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4712                 enum nl80211_mfp mfp =
4713                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4714                 if (mfp == NL80211_MFP_REQUIRED)
4715                         use_mfp = true;
4716                 else if (mfp != NL80211_MFP_NO)
4717                         return -EINVAL;
4718         }
4719
4720         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4721                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4722
4723         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4724                 flags |= ASSOC_REQ_DISABLE_HT;
4725
4726         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4727                 ht_capa_mask =
4728                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4729
4730         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4731                 if (!ht_capa_mask)
4732                         return -EINVAL;
4733                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4734         }
4735
4736         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4737         if (!err)
4738                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4739                                           ssid, ssid_len, ie, ie_len, use_mfp,
4740                                           &crypto, flags, ht_capa,
4741                                           ht_capa_mask);
4742
4743         return err;
4744 }
4745
4746 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4747 {
4748         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4749         struct net_device *dev = info->user_ptr[1];
4750         const u8 *ie = NULL, *bssid;
4751         int ie_len = 0;
4752         u16 reason_code;
4753         bool local_state_change;
4754
4755         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4756                 return -EINVAL;
4757
4758         if (!info->attrs[NL80211_ATTR_MAC])
4759                 return -EINVAL;
4760
4761         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4762                 return -EINVAL;
4763
4764         if (!rdev->ops->deauth)
4765                 return -EOPNOTSUPP;
4766
4767         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4768             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4769                 return -EOPNOTSUPP;
4770
4771         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4772
4773         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4774         if (reason_code == 0) {
4775                 /* Reason Code 0 is reserved */
4776                 return -EINVAL;
4777         }
4778
4779         if (info->attrs[NL80211_ATTR_IE]) {
4780                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4781                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4782         }
4783
4784         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4785
4786         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4787                                     local_state_change);
4788 }
4789
4790 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4791 {
4792         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4793         struct net_device *dev = info->user_ptr[1];
4794         const u8 *ie = NULL, *bssid;
4795         int ie_len = 0;
4796         u16 reason_code;
4797         bool local_state_change;
4798
4799         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4800                 return -EINVAL;
4801
4802         if (!info->attrs[NL80211_ATTR_MAC])
4803                 return -EINVAL;
4804
4805         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4806                 return -EINVAL;
4807
4808         if (!rdev->ops->disassoc)
4809                 return -EOPNOTSUPP;
4810
4811         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4812             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4813                 return -EOPNOTSUPP;
4814
4815         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4816
4817         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4818         if (reason_code == 0) {
4819                 /* Reason Code 0 is reserved */
4820                 return -EINVAL;
4821         }
4822
4823         if (info->attrs[NL80211_ATTR_IE]) {
4824                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4825                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4826         }
4827
4828         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4829
4830         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4831                                       local_state_change);
4832 }
4833
4834 static bool
4835 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4836                          int mcast_rate[IEEE80211_NUM_BANDS],
4837                          int rateval)
4838 {
4839         struct wiphy *wiphy = &rdev->wiphy;
4840         bool found = false;
4841         int band, i;
4842
4843         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4844                 struct ieee80211_supported_band *sband;
4845
4846                 sband = wiphy->bands[band];
4847                 if (!sband)
4848                         continue;
4849
4850                 for (i = 0; i < sband->n_bitrates; i++) {
4851                         if (sband->bitrates[i].bitrate == rateval) {
4852                                 mcast_rate[band] = i + 1;
4853                                 found = true;
4854                                 break;
4855                         }
4856                 }
4857         }
4858
4859         return found;
4860 }
4861
4862 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4863 {
4864         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4865         struct net_device *dev = info->user_ptr[1];
4866         struct cfg80211_ibss_params ibss;
4867         struct wiphy *wiphy;
4868         struct cfg80211_cached_keys *connkeys = NULL;
4869         int err;
4870
4871         memset(&ibss, 0, sizeof(ibss));
4872
4873         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4874                 return -EINVAL;
4875
4876         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4877             !info->attrs[NL80211_ATTR_SSID] ||
4878             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4879                 return -EINVAL;
4880
4881         ibss.beacon_interval = 100;
4882
4883         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4884                 ibss.beacon_interval =
4885                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4886                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4887                         return -EINVAL;
4888         }
4889
4890         if (!rdev->ops->join_ibss)
4891                 return -EOPNOTSUPP;
4892
4893         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4894                 return -EOPNOTSUPP;
4895
4896         wiphy = &rdev->wiphy;
4897
4898         if (info->attrs[NL80211_ATTR_MAC]) {
4899                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4900
4901                 if (!is_valid_ether_addr(ibss.bssid))
4902                         return -EINVAL;
4903         }
4904         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4905         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4906
4907         if (info->attrs[NL80211_ATTR_IE]) {
4908                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4909                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4910         }
4911
4912         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4913                 enum nl80211_channel_type channel_type;
4914
4915                 channel_type = nla_get_u32(
4916                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4917                 if (channel_type != NL80211_CHAN_NO_HT &&
4918                     channel_type != NL80211_CHAN_HT20 &&
4919                     channel_type != NL80211_CHAN_HT40MINUS &&
4920                     channel_type != NL80211_CHAN_HT40PLUS)
4921                         return -EINVAL;
4922
4923                 if (channel_type != NL80211_CHAN_NO_HT &&
4924                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4925                         return -EINVAL;
4926
4927                 ibss.channel_type = channel_type;
4928         } else {
4929                 ibss.channel_type = NL80211_CHAN_NO_HT;
4930         }
4931
4932         ibss.channel = rdev_freq_to_chan(rdev,
4933                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4934                 ibss.channel_type);
4935         if (!ibss.channel ||
4936             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4937             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4938                 return -EINVAL;
4939
4940         /* Both channels should be able to initiate communication */
4941         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4942              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4943             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4944                                           ibss.channel_type))
4945                 return -EINVAL;
4946
4947         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4948         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4949
4950         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4951                 u8 *rates =
4952                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4953                 int n_rates =
4954                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4955                 struct ieee80211_supported_band *sband =
4956                         wiphy->bands[ibss.channel->band];
4957
4958                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4959                                              &ibss.basic_rates);
4960                 if (err)
4961                         return err;
4962         }
4963
4964         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4965             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4966                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4967                 return -EINVAL;
4968
4969         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4970                 connkeys = nl80211_parse_connkeys(rdev,
4971                                         info->attrs[NL80211_ATTR_KEYS]);
4972                 if (IS_ERR(connkeys))
4973                         return PTR_ERR(connkeys);
4974         }
4975
4976         ibss.control_port =
4977                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4978
4979         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4980         if (err)
4981                 kfree(connkeys);
4982         return err;
4983 }
4984
4985 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4986 {
4987         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4988         struct net_device *dev = info->user_ptr[1];
4989
4990         if (!rdev->ops->leave_ibss)
4991                 return -EOPNOTSUPP;
4992
4993         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4994                 return -EOPNOTSUPP;
4995
4996         return cfg80211_leave_ibss(rdev, dev, false);
4997 }
4998
4999 #ifdef CONFIG_NL80211_TESTMODE
5000 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5001         .name = "testmode",
5002 };
5003
5004 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5005 {
5006         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5007         int err;
5008
5009         if (!info->attrs[NL80211_ATTR_TESTDATA])
5010                 return -EINVAL;
5011
5012         err = -EOPNOTSUPP;
5013         if (rdev->ops->testmode_cmd) {
5014                 rdev->testmode_info = info;
5015                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5016                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5017                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5018                 rdev->testmode_info = NULL;
5019         }
5020
5021         return err;
5022 }
5023
5024 static int nl80211_testmode_dump(struct sk_buff *skb,
5025                                  struct netlink_callback *cb)
5026 {
5027         struct cfg80211_registered_device *rdev;
5028         int err;
5029         long phy_idx;
5030         void *data = NULL;
5031         int data_len = 0;
5032
5033         if (cb->args[0]) {
5034                 /*
5035                  * 0 is a valid index, but not valid for args[0],
5036                  * so we need to offset by 1.
5037                  */
5038                 phy_idx = cb->args[0] - 1;
5039         } else {
5040                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5041                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5042                                   nl80211_policy);
5043                 if (err)
5044                         return err;
5045                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
5046                         phy_idx = nla_get_u32(
5047                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
5048                 } else {
5049                         struct net_device *netdev;
5050
5051                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
5052                                                       nl80211_fam.attrbuf,
5053                                                       &rdev, &netdev);
5054                         if (err)
5055                                 return err;
5056                         dev_put(netdev);
5057                         phy_idx = rdev->wiphy_idx;
5058                         cfg80211_unlock_rdev(rdev);
5059                 }
5060                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5061                         cb->args[1] =
5062                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5063         }
5064
5065         if (cb->args[1]) {
5066                 data = nla_data((void *)cb->args[1]);
5067                 data_len = nla_len((void *)cb->args[1]);
5068         }
5069
5070         mutex_lock(&cfg80211_mutex);
5071         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5072         if (!rdev) {
5073                 mutex_unlock(&cfg80211_mutex);
5074                 return -ENOENT;
5075         }
5076         cfg80211_lock_rdev(rdev);
5077         mutex_unlock(&cfg80211_mutex);
5078
5079         if (!rdev->ops->testmode_dump) {
5080                 err = -EOPNOTSUPP;
5081                 goto out_err;
5082         }
5083
5084         while (1) {
5085                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5086                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5087                                            NL80211_CMD_TESTMODE);
5088                 struct nlattr *tmdata;
5089
5090                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5091                         genlmsg_cancel(skb, hdr);
5092                         break;
5093                 }
5094
5095                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5096                 if (!tmdata) {
5097                         genlmsg_cancel(skb, hdr);
5098                         break;
5099                 }
5100                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5101                                                data, data_len);
5102                 nla_nest_end(skb, tmdata);
5103
5104                 if (err == -ENOBUFS || err == -ENOENT) {
5105                         genlmsg_cancel(skb, hdr);
5106                         break;
5107                 } else if (err) {
5108                         genlmsg_cancel(skb, hdr);
5109                         goto out_err;
5110                 }
5111
5112                 genlmsg_end(skb, hdr);
5113         }
5114
5115         err = skb->len;
5116         /* see above */
5117         cb->args[0] = phy_idx + 1;
5118  out_err:
5119         cfg80211_unlock_rdev(rdev);
5120         return err;
5121 }
5122
5123 static struct sk_buff *
5124 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5125                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5126 {
5127         struct sk_buff *skb;
5128         void *hdr;
5129         struct nlattr *data;
5130
5131         skb = nlmsg_new(approxlen + 100, gfp);
5132         if (!skb)
5133                 return NULL;
5134
5135         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5136         if (!hdr) {
5137                 kfree_skb(skb);
5138                 return NULL;
5139         }
5140
5141         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5142                 goto nla_put_failure;
5143         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5144
5145         ((void **)skb->cb)[0] = rdev;
5146         ((void **)skb->cb)[1] = hdr;
5147         ((void **)skb->cb)[2] = data;
5148
5149         return skb;
5150
5151  nla_put_failure:
5152         kfree_skb(skb);
5153         return NULL;
5154 }
5155
5156 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5157                                                   int approxlen)
5158 {
5159         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5160
5161         if (WARN_ON(!rdev->testmode_info))
5162                 return NULL;
5163
5164         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5165                                 rdev->testmode_info->snd_pid,
5166                                 rdev->testmode_info->snd_seq,
5167                                 GFP_KERNEL);
5168 }
5169 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5170
5171 int cfg80211_testmode_reply(struct sk_buff *skb)
5172 {
5173         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5174         void *hdr = ((void **)skb->cb)[1];
5175         struct nlattr *data = ((void **)skb->cb)[2];
5176
5177         if (WARN_ON(!rdev->testmode_info)) {
5178                 kfree_skb(skb);
5179                 return -EINVAL;
5180         }
5181
5182         nla_nest_end(skb, data);
5183         genlmsg_end(skb, hdr);
5184         return genlmsg_reply(skb, rdev->testmode_info);
5185 }
5186 EXPORT_SYMBOL(cfg80211_testmode_reply);
5187
5188 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5189                                                   int approxlen, gfp_t gfp)
5190 {
5191         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5192
5193         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5194 }
5195 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5196
5197 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5198 {
5199         void *hdr = ((void **)skb->cb)[1];
5200         struct nlattr *data = ((void **)skb->cb)[2];
5201
5202         nla_nest_end(skb, data);
5203         genlmsg_end(skb, hdr);
5204         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5205 }
5206 EXPORT_SYMBOL(cfg80211_testmode_event);
5207 #endif
5208
5209 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5210 {
5211         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5212         struct net_device *dev = info->user_ptr[1];
5213         struct cfg80211_connect_params connect;
5214         struct wiphy *wiphy;
5215         struct cfg80211_cached_keys *connkeys = NULL;
5216         int err;
5217
5218         memset(&connect, 0, sizeof(connect));
5219
5220         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5221                 return -EINVAL;
5222
5223         if (!info->attrs[NL80211_ATTR_SSID] ||
5224             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5225                 return -EINVAL;
5226
5227         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5228                 connect.auth_type =
5229                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5230                 if (!nl80211_valid_auth_type(connect.auth_type))
5231                         return -EINVAL;
5232         } else
5233                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5234
5235         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5236
5237         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5238                                       NL80211_MAX_NR_CIPHER_SUITES);
5239         if (err)
5240                 return err;
5241
5242         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5243             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5244                 return -EOPNOTSUPP;
5245
5246         wiphy = &rdev->wiphy;
5247
5248         connect.bg_scan_period = -1;
5249         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5250                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5251                 connect.bg_scan_period =
5252                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5253         }
5254
5255         if (info->attrs[NL80211_ATTR_MAC])
5256                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5257         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5258         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5259
5260         if (info->attrs[NL80211_ATTR_IE]) {
5261                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5262                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5263         }
5264
5265         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5266                 connect.channel =
5267                         ieee80211_get_channel(wiphy,
5268                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5269                 if (!connect.channel ||
5270                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5271                         return -EINVAL;
5272         }
5273
5274         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5275                 connkeys = nl80211_parse_connkeys(rdev,
5276                                         info->attrs[NL80211_ATTR_KEYS]);
5277                 if (IS_ERR(connkeys))
5278                         return PTR_ERR(connkeys);
5279         }
5280
5281         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5282                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5283
5284         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5285                 memcpy(&connect.ht_capa_mask,
5286                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5287                        sizeof(connect.ht_capa_mask));
5288
5289         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5290                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5291                         return -EINVAL;
5292                 memcpy(&connect.ht_capa,
5293                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5294                        sizeof(connect.ht_capa));
5295         }
5296
5297         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5298         if (err)
5299                 kfree(connkeys);
5300         return err;
5301 }
5302
5303 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5304 {
5305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5306         struct net_device *dev = info->user_ptr[1];
5307         u16 reason;
5308
5309         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5310                 reason = WLAN_REASON_DEAUTH_LEAVING;
5311         else
5312                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5313
5314         if (reason == 0)
5315                 return -EINVAL;
5316
5317         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5318             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5319                 return -EOPNOTSUPP;
5320
5321         return cfg80211_disconnect(rdev, dev, reason, true);
5322 }
5323
5324 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5325 {
5326         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5327         struct net *net;
5328         int err;
5329         u32 pid;
5330
5331         if (!info->attrs[NL80211_ATTR_PID])
5332                 return -EINVAL;
5333
5334         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5335
5336         net = get_net_ns_by_pid(pid);
5337         if (IS_ERR(net))
5338                 return PTR_ERR(net);
5339
5340         err = 0;
5341
5342         /* check if anything to do */
5343         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5344                 err = cfg80211_switch_netns(rdev, net);
5345
5346         put_net(net);
5347         return err;
5348 }
5349
5350 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5351 {
5352         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5353         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5354                         struct cfg80211_pmksa *pmksa) = NULL;
5355         struct net_device *dev = info->user_ptr[1];
5356         struct cfg80211_pmksa pmksa;
5357
5358         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5359
5360         if (!info->attrs[NL80211_ATTR_MAC])
5361                 return -EINVAL;
5362
5363         if (!info->attrs[NL80211_ATTR_PMKID])
5364                 return -EINVAL;
5365
5366         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5367         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5368
5369         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5370             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5371                 return -EOPNOTSUPP;
5372
5373         switch (info->genlhdr->cmd) {
5374         case NL80211_CMD_SET_PMKSA:
5375                 rdev_ops = rdev->ops->set_pmksa;
5376                 break;
5377         case NL80211_CMD_DEL_PMKSA:
5378                 rdev_ops = rdev->ops->del_pmksa;
5379                 break;
5380         default:
5381                 WARN_ON(1);
5382                 break;
5383         }
5384
5385         if (!rdev_ops)
5386                 return -EOPNOTSUPP;
5387
5388         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5389 }
5390
5391 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5392 {
5393         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5394         struct net_device *dev = info->user_ptr[1];
5395
5396         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5397             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5398                 return -EOPNOTSUPP;
5399
5400         if (!rdev->ops->flush_pmksa)
5401                 return -EOPNOTSUPP;
5402
5403         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5404 }
5405
5406 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5407 {
5408         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5409         struct net_device *dev = info->user_ptr[1];
5410         u8 action_code, dialog_token;
5411         u16 status_code;
5412         u8 *peer;
5413
5414         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5415             !rdev->ops->tdls_mgmt)
5416                 return -EOPNOTSUPP;
5417
5418         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5419             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5420             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5421             !info->attrs[NL80211_ATTR_IE] ||
5422             !info->attrs[NL80211_ATTR_MAC])
5423                 return -EINVAL;
5424
5425         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5426         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5427         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5428         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5429
5430         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5431                                     dialog_token, status_code,
5432                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5433                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5434 }
5435
5436 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5437 {
5438         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5439         struct net_device *dev = info->user_ptr[1];
5440         enum nl80211_tdls_operation operation;
5441         u8 *peer;
5442
5443         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5444             !rdev->ops->tdls_oper)
5445                 return -EOPNOTSUPP;
5446
5447         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5448             !info->attrs[NL80211_ATTR_MAC])
5449                 return -EINVAL;
5450
5451         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5452         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5453
5454         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5455 }
5456
5457 static int nl80211_remain_on_channel(struct sk_buff *skb,
5458                                      struct genl_info *info)
5459 {
5460         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5461         struct net_device *dev = info->user_ptr[1];
5462         struct ieee80211_channel *chan;
5463         struct sk_buff *msg;
5464         void *hdr;
5465         u64 cookie;
5466         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5467         u32 freq, duration;
5468         int err;
5469
5470         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5471             !info->attrs[NL80211_ATTR_DURATION])
5472                 return -EINVAL;
5473
5474         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5475
5476         /*
5477          * We should be on that channel for at least one jiffie,
5478          * and more than 5 seconds seems excessive.
5479          */
5480         if (!duration || !msecs_to_jiffies(duration) ||
5481             duration > rdev->wiphy.max_remain_on_channel_duration)
5482                 return -EINVAL;
5483
5484         if (!rdev->ops->remain_on_channel ||
5485             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5486                 return -EOPNOTSUPP;
5487
5488         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5489                 channel_type = nla_get_u32(
5490                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5491                 if (channel_type != NL80211_CHAN_NO_HT &&
5492                     channel_type != NL80211_CHAN_HT20 &&
5493                     channel_type != NL80211_CHAN_HT40PLUS &&
5494                     channel_type != NL80211_CHAN_HT40MINUS)
5495                         return -EINVAL;
5496         }
5497
5498         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5499         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5500         if (chan == NULL)
5501                 return -EINVAL;
5502
5503         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5504         if (!msg)
5505                 return -ENOMEM;
5506
5507         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5508                              NL80211_CMD_REMAIN_ON_CHANNEL);
5509
5510         if (IS_ERR(hdr)) {
5511                 err = PTR_ERR(hdr);
5512                 goto free_msg;
5513         }
5514
5515         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5516                                            channel_type, duration, &cookie);
5517
5518         if (err)
5519                 goto free_msg;
5520
5521         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5522                 goto nla_put_failure;
5523
5524         genlmsg_end(msg, hdr);
5525
5526         return genlmsg_reply(msg, info);
5527
5528  nla_put_failure:
5529         err = -ENOBUFS;
5530  free_msg:
5531         nlmsg_free(msg);
5532         return err;
5533 }
5534
5535 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5536                                             struct genl_info *info)
5537 {
5538         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5539         struct net_device *dev = info->user_ptr[1];
5540         u64 cookie;
5541
5542         if (!info->attrs[NL80211_ATTR_COOKIE])
5543                 return -EINVAL;
5544
5545         if (!rdev->ops->cancel_remain_on_channel)
5546                 return -EOPNOTSUPP;
5547
5548         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5549
5550         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5551 }
5552
5553 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5554                            u8 *rates, u8 rates_len)
5555 {
5556         u8 i;
5557         u32 mask = 0;
5558
5559         for (i = 0; i < rates_len; i++) {
5560                 int rate = (rates[i] & 0x7f) * 5;
5561                 int ridx;
5562                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5563                         struct ieee80211_rate *srate =
5564                                 &sband->bitrates[ridx];
5565                         if (rate == srate->bitrate) {
5566                                 mask |= 1 << ridx;
5567                                 break;
5568                         }
5569                 }
5570                 if (ridx == sband->n_bitrates)
5571                         return 0; /* rate not found */
5572         }
5573
5574         return mask;
5575 }
5576
5577 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5578                                u8 *rates, u8 rates_len,
5579                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5580 {
5581         u8 i;
5582
5583         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5584
5585         for (i = 0; i < rates_len; i++) {
5586                 int ridx, rbit;
5587
5588                 ridx = rates[i] / 8;
5589                 rbit = BIT(rates[i] % 8);
5590
5591                 /* check validity */
5592                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5593                         return false;
5594
5595                 /* check availability */
5596                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5597                         mcs[ridx] |= rbit;
5598                 else
5599                         return false;
5600         }
5601
5602         return true;
5603 }
5604
5605 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5606         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5607                                     .len = NL80211_MAX_SUPP_RATES },
5608         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5609                                  .len = NL80211_MAX_SUPP_HT_RATES },
5610 };
5611
5612 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5613                                        struct genl_info *info)
5614 {
5615         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5616         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5617         struct cfg80211_bitrate_mask mask;
5618         int rem, i;
5619         struct net_device *dev = info->user_ptr[1];
5620         struct nlattr *tx_rates;
5621         struct ieee80211_supported_band *sband;
5622
5623         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5624                 return -EINVAL;
5625
5626         if (!rdev->ops->set_bitrate_mask)
5627                 return -EOPNOTSUPP;
5628
5629         memset(&mask, 0, sizeof(mask));
5630         /* Default to all rates enabled */
5631         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5632                 sband = rdev->wiphy.bands[i];
5633                 mask.control[i].legacy =
5634                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5635                 if (sband)
5636                         memcpy(mask.control[i].mcs,
5637                                sband->ht_cap.mcs.rx_mask,
5638                                sizeof(mask.control[i].mcs));
5639                 else
5640                         memset(mask.control[i].mcs, 0,
5641                                sizeof(mask.control[i].mcs));
5642         }
5643
5644         /*
5645          * The nested attribute uses enum nl80211_band as the index. This maps
5646          * directly to the enum ieee80211_band values used in cfg80211.
5647          */
5648         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5649         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5650         {
5651                 enum ieee80211_band band = nla_type(tx_rates);
5652                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5653                         return -EINVAL;
5654                 sband = rdev->wiphy.bands[band];
5655                 if (sband == NULL)
5656                         return -EINVAL;
5657                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5658                           nla_len(tx_rates), nl80211_txattr_policy);
5659                 if (tb[NL80211_TXRATE_LEGACY]) {
5660                         mask.control[band].legacy = rateset_to_mask(
5661                                 sband,
5662                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5663                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5664                         if ((mask.control[band].legacy == 0) &&
5665                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5666                                 return -EINVAL;
5667                 }
5668                 if (tb[NL80211_TXRATE_MCS]) {
5669                         if (!ht_rateset_to_mask(
5670                                         sband,
5671                                         nla_data(tb[NL80211_TXRATE_MCS]),
5672                                         nla_len(tb[NL80211_TXRATE_MCS]),
5673                                         mask.control[band].mcs))
5674                                 return -EINVAL;
5675                 }
5676
5677                 if (mask.control[band].legacy == 0) {
5678                         /* don't allow empty legacy rates if HT
5679                          * is not even supported. */
5680                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5681                                 return -EINVAL;
5682
5683                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5684                                 if (mask.control[band].mcs[i])
5685                                         break;
5686
5687                         /* legacy and mcs rates may not be both empty */
5688                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5689                                 return -EINVAL;
5690                 }
5691         }
5692
5693         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5694 }
5695
5696 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5697 {
5698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5699         struct net_device *dev = info->user_ptr[1];
5700         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5701
5702         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5703                 return -EINVAL;
5704
5705         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5706                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5707
5708         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5709             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5710             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5711             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5712             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5713             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5714             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5715                 return -EOPNOTSUPP;
5716
5717         /* not much point in registering if we can't reply */
5718         if (!rdev->ops->mgmt_tx)
5719                 return -EOPNOTSUPP;
5720
5721         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5722                         frame_type,
5723                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5724                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5725 }
5726
5727 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5728 {
5729         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5730         struct net_device *dev = info->user_ptr[1];
5731         struct ieee80211_channel *chan;
5732         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5733         bool channel_type_valid = false;
5734         u32 freq;
5735         int err;
5736         void *hdr = NULL;
5737         u64 cookie;
5738         struct sk_buff *msg = NULL;
5739         unsigned int wait = 0;
5740         bool offchan, no_cck, dont_wait_for_ack;
5741
5742         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5743
5744         if (!info->attrs[NL80211_ATTR_FRAME] ||
5745             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5746                 return -EINVAL;
5747
5748         if (!rdev->ops->mgmt_tx)
5749                 return -EOPNOTSUPP;
5750
5751         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5752             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5753             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5754             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5755             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5756             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5757             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5758                 return -EOPNOTSUPP;
5759
5760         if (info->attrs[NL80211_ATTR_DURATION]) {
5761                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5762                         return -EINVAL;
5763                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5764         }
5765
5766         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5767                 channel_type = nla_get_u32(
5768                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5769                 if (channel_type != NL80211_CHAN_NO_HT &&
5770                     channel_type != NL80211_CHAN_HT20 &&
5771                     channel_type != NL80211_CHAN_HT40PLUS &&
5772                     channel_type != NL80211_CHAN_HT40MINUS)
5773                         return -EINVAL;
5774                 channel_type_valid = true;
5775         }
5776
5777         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5778
5779         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5780                 return -EINVAL;
5781
5782         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5783
5784         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5785         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5786         if (chan == NULL)
5787                 return -EINVAL;
5788
5789         if (!dont_wait_for_ack) {
5790                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5791                 if (!msg)
5792                         return -ENOMEM;
5793
5794                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5795                                      NL80211_CMD_FRAME);
5796
5797                 if (IS_ERR(hdr)) {
5798                         err = PTR_ERR(hdr);
5799                         goto free_msg;
5800                 }
5801         }
5802
5803         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5804                                     channel_type_valid, wait,
5805                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5806                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5807                                     no_cck, dont_wait_for_ack, &cookie);
5808         if (err)
5809                 goto free_msg;
5810
5811         if (msg) {
5812                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5813                         goto nla_put_failure;
5814
5815                 genlmsg_end(msg, hdr);
5816                 return genlmsg_reply(msg, info);
5817         }
5818
5819         return 0;
5820
5821  nla_put_failure:
5822         err = -ENOBUFS;
5823  free_msg:
5824         nlmsg_free(msg);
5825         return err;
5826 }
5827
5828 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5829 {
5830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5831         struct net_device *dev = info->user_ptr[1];
5832         u64 cookie;
5833
5834         if (!info->attrs[NL80211_ATTR_COOKIE])
5835                 return -EINVAL;
5836
5837         if (!rdev->ops->mgmt_tx_cancel_wait)
5838                 return -EOPNOTSUPP;
5839
5840         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5841             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5842             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5843             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5844             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5845             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5846                 return -EOPNOTSUPP;
5847
5848         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5849
5850         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5851 }
5852
5853 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5854 {
5855         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5856         struct wireless_dev *wdev;
5857         struct net_device *dev = info->user_ptr[1];
5858         u8 ps_state;
5859         bool state;
5860         int err;
5861
5862         if (!info->attrs[NL80211_ATTR_PS_STATE])
5863                 return -EINVAL;
5864
5865         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5866
5867         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5868                 return -EINVAL;
5869
5870         wdev = dev->ieee80211_ptr;
5871
5872         if (!rdev->ops->set_power_mgmt)
5873                 return -EOPNOTSUPP;
5874
5875         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5876
5877         if (state == wdev->ps)
5878                 return 0;
5879
5880         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5881                                         wdev->ps_timeout);
5882         if (!err)
5883                 wdev->ps = state;
5884         return err;
5885 }
5886
5887 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5888 {
5889         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5890         enum nl80211_ps_state ps_state;
5891         struct wireless_dev *wdev;
5892         struct net_device *dev = info->user_ptr[1];
5893         struct sk_buff *msg;
5894         void *hdr;
5895         int err;
5896
5897         wdev = dev->ieee80211_ptr;
5898
5899         if (!rdev->ops->set_power_mgmt)
5900                 return -EOPNOTSUPP;
5901
5902         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5903         if (!msg)
5904                 return -ENOMEM;
5905
5906         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5907                              NL80211_CMD_GET_POWER_SAVE);
5908         if (!hdr) {
5909                 err = -ENOBUFS;
5910                 goto free_msg;
5911         }
5912
5913         if (wdev->ps)
5914                 ps_state = NL80211_PS_ENABLED;
5915         else
5916                 ps_state = NL80211_PS_DISABLED;
5917
5918         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
5919                 goto nla_put_failure;
5920
5921         genlmsg_end(msg, hdr);
5922         return genlmsg_reply(msg, info);
5923
5924  nla_put_failure:
5925         err = -ENOBUFS;
5926  free_msg:
5927         nlmsg_free(msg);
5928         return err;
5929 }
5930
5931 static struct nla_policy
5932 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5933         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5934         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5935         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5936 };
5937
5938 static int nl80211_set_cqm_rssi(struct genl_info *info,
5939                                 s32 threshold, u32 hysteresis)
5940 {
5941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5942         struct wireless_dev *wdev;
5943         struct net_device *dev = info->user_ptr[1];
5944
5945         if (threshold > 0)
5946                 return -EINVAL;
5947
5948         wdev = dev->ieee80211_ptr;
5949
5950         if (!rdev->ops->set_cqm_rssi_config)
5951                 return -EOPNOTSUPP;
5952
5953         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5954             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5955                 return -EOPNOTSUPP;
5956
5957         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5958                                               threshold, hysteresis);
5959 }
5960
5961 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5962 {
5963         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5964         struct nlattr *cqm;
5965         int err;
5966
5967         cqm = info->attrs[NL80211_ATTR_CQM];
5968         if (!cqm) {
5969                 err = -EINVAL;
5970                 goto out;
5971         }
5972
5973         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5974                                nl80211_attr_cqm_policy);
5975         if (err)
5976                 goto out;
5977
5978         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5979             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5980                 s32 threshold;
5981                 u32 hysteresis;
5982                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5983                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5984                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5985         } else
5986                 err = -EINVAL;
5987
5988 out:
5989         return err;
5990 }
5991
5992 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5993 {
5994         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5995         struct net_device *dev = info->user_ptr[1];
5996         struct mesh_config cfg;
5997         struct mesh_setup setup;
5998         int err;
5999
6000         /* start with default */
6001         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6002         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6003
6004         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6005                 /* and parse parameters if given */
6006                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6007                 if (err)
6008                         return err;
6009         }
6010
6011         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6012             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6013                 return -EINVAL;
6014
6015         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6016         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6017
6018         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6019             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6020                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6021                         return -EINVAL;
6022
6023         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6024                 /* parse additional setup parameters if given */
6025                 err = nl80211_parse_mesh_setup(info, &setup);
6026                 if (err)
6027                         return err;
6028         }
6029
6030         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6031 }
6032
6033 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6034 {
6035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6036         struct net_device *dev = info->user_ptr[1];
6037
6038         return cfg80211_leave_mesh(rdev, dev);
6039 }
6040
6041 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6042 {
6043         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6044         struct sk_buff *msg;
6045         void *hdr;
6046
6047         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6048                 return -EOPNOTSUPP;
6049
6050         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6051         if (!msg)
6052                 return -ENOMEM;
6053
6054         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6055                              NL80211_CMD_GET_WOWLAN);
6056         if (!hdr)
6057                 goto nla_put_failure;
6058
6059         if (rdev->wowlan) {
6060                 struct nlattr *nl_wowlan;
6061
6062                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6063                 if (!nl_wowlan)
6064                         goto nla_put_failure;
6065
6066                 if ((rdev->wowlan->any &&
6067                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6068                     (rdev->wowlan->disconnect &&
6069                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6070                     (rdev->wowlan->magic_pkt &&
6071                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6072                     (rdev->wowlan->gtk_rekey_failure &&
6073                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6074                     (rdev->wowlan->eap_identity_req &&
6075                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6076                     (rdev->wowlan->four_way_handshake &&
6077                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6078                     (rdev->wowlan->rfkill_release &&
6079                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6080                         goto nla_put_failure;
6081                 if (rdev->wowlan->n_patterns) {
6082                         struct nlattr *nl_pats, *nl_pat;
6083                         int i, pat_len;
6084
6085                         nl_pats = nla_nest_start(msg,
6086                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6087                         if (!nl_pats)
6088                                 goto nla_put_failure;
6089
6090                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6091                                 nl_pat = nla_nest_start(msg, i + 1);
6092                                 if (!nl_pat)
6093                                         goto nla_put_failure;
6094                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6095                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6096                                             DIV_ROUND_UP(pat_len, 8),
6097                                             rdev->wowlan->patterns[i].mask) ||
6098                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6099                                             pat_len,
6100                                             rdev->wowlan->patterns[i].pattern))
6101                                         goto nla_put_failure;
6102                                 nla_nest_end(msg, nl_pat);
6103                         }
6104                         nla_nest_end(msg, nl_pats);
6105                 }
6106
6107                 nla_nest_end(msg, nl_wowlan);
6108         }
6109
6110         genlmsg_end(msg, hdr);
6111         return genlmsg_reply(msg, info);
6112
6113 nla_put_failure:
6114         nlmsg_free(msg);
6115         return -ENOBUFS;
6116 }
6117
6118 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6119 {
6120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6121         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6122         struct cfg80211_wowlan no_triggers = {};
6123         struct cfg80211_wowlan new_triggers = {};
6124         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6125         int err, i;
6126         bool prev_enabled = rdev->wowlan;
6127
6128         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6129                 return -EOPNOTSUPP;
6130
6131         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6132                 goto no_triggers;
6133
6134         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6135                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6136                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6137                         nl80211_wowlan_policy);
6138         if (err)
6139                 return err;
6140
6141         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6142                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6143                         return -EINVAL;
6144                 new_triggers.any = true;
6145         }
6146
6147         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6148                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6149                         return -EINVAL;
6150                 new_triggers.disconnect = true;
6151         }
6152
6153         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6154                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6155                         return -EINVAL;
6156                 new_triggers.magic_pkt = true;
6157         }
6158
6159         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6160                 return -EINVAL;
6161
6162         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6163                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6164                         return -EINVAL;
6165                 new_triggers.gtk_rekey_failure = true;
6166         }
6167
6168         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6169                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6170                         return -EINVAL;
6171                 new_triggers.eap_identity_req = true;
6172         }
6173
6174         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6175                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6176                         return -EINVAL;
6177                 new_triggers.four_way_handshake = true;
6178         }
6179
6180         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6181                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6182                         return -EINVAL;
6183                 new_triggers.rfkill_release = true;
6184         }
6185
6186         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6187                 struct nlattr *pat;
6188                 int n_patterns = 0;
6189                 int rem, pat_len, mask_len;
6190                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6191
6192                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6193                                     rem)
6194                         n_patterns++;
6195                 if (n_patterns > wowlan->n_patterns)
6196                         return -EINVAL;
6197
6198                 new_triggers.patterns = kcalloc(n_patterns,
6199                                                 sizeof(new_triggers.patterns[0]),
6200                                                 GFP_KERNEL);
6201                 if (!new_triggers.patterns)
6202                         return -ENOMEM;
6203
6204                 new_triggers.n_patterns = n_patterns;
6205                 i = 0;
6206
6207                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6208                                     rem) {
6209                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6210                                   nla_data(pat), nla_len(pat), NULL);
6211                         err = -EINVAL;
6212                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6213                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6214                                 goto error;
6215                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6216                         mask_len = DIV_ROUND_UP(pat_len, 8);
6217                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6218                             mask_len)
6219                                 goto error;
6220                         if (pat_len > wowlan->pattern_max_len ||
6221                             pat_len < wowlan->pattern_min_len)
6222                                 goto error;
6223
6224                         new_triggers.patterns[i].mask =
6225                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6226                         if (!new_triggers.patterns[i].mask) {
6227                                 err = -ENOMEM;
6228                                 goto error;
6229                         }
6230                         new_triggers.patterns[i].pattern =
6231                                 new_triggers.patterns[i].mask + mask_len;
6232                         memcpy(new_triggers.patterns[i].mask,
6233                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6234                                mask_len);
6235                         new_triggers.patterns[i].pattern_len = pat_len;
6236                         memcpy(new_triggers.patterns[i].pattern,
6237                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6238                                pat_len);
6239                         i++;
6240                 }
6241         }
6242
6243         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6244                 struct cfg80211_wowlan *ntrig;
6245                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6246                                 GFP_KERNEL);
6247                 if (!ntrig) {
6248                         err = -ENOMEM;
6249                         goto error;
6250                 }
6251                 cfg80211_rdev_free_wowlan(rdev);
6252                 rdev->wowlan = ntrig;
6253         } else {
6254  no_triggers:
6255                 cfg80211_rdev_free_wowlan(rdev);
6256                 rdev->wowlan = NULL;
6257         }
6258
6259         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6260                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6261
6262         return 0;
6263  error:
6264         for (i = 0; i < new_triggers.n_patterns; i++)
6265                 kfree(new_triggers.patterns[i].mask);
6266         kfree(new_triggers.patterns);
6267         return err;
6268 }
6269
6270 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6271 {
6272         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6273         struct net_device *dev = info->user_ptr[1];
6274         struct wireless_dev *wdev = dev->ieee80211_ptr;
6275         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6276         struct cfg80211_gtk_rekey_data rekey_data;
6277         int err;
6278
6279         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6280                 return -EINVAL;
6281
6282         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6283                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6284                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6285                         nl80211_rekey_policy);
6286         if (err)
6287                 return err;
6288
6289         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6290                 return -ERANGE;
6291         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6292                 return -ERANGE;
6293         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6294                 return -ERANGE;
6295
6296         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6297                NL80211_KEK_LEN);
6298         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6299                NL80211_KCK_LEN);
6300         memcpy(rekey_data.replay_ctr,
6301                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6302                NL80211_REPLAY_CTR_LEN);
6303
6304         wdev_lock(wdev);
6305         if (!wdev->current_bss) {
6306                 err = -ENOTCONN;
6307                 goto out;
6308         }
6309
6310         if (!rdev->ops->set_rekey_data) {
6311                 err = -EOPNOTSUPP;
6312                 goto out;
6313         }
6314
6315         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6316  out:
6317         wdev_unlock(wdev);
6318         return err;
6319 }
6320
6321 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6322                                              struct genl_info *info)
6323 {
6324         struct net_device *dev = info->user_ptr[1];
6325         struct wireless_dev *wdev = dev->ieee80211_ptr;
6326
6327         if (wdev->iftype != NL80211_IFTYPE_AP &&
6328             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6329                 return -EINVAL;
6330
6331         if (wdev->ap_unexpected_nlpid)
6332                 return -EBUSY;
6333
6334         wdev->ap_unexpected_nlpid = info->snd_pid;
6335         return 0;
6336 }
6337
6338 static int nl80211_probe_client(struct sk_buff *skb,
6339                                 struct genl_info *info)
6340 {
6341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6342         struct net_device *dev = info->user_ptr[1];
6343         struct wireless_dev *wdev = dev->ieee80211_ptr;
6344         struct sk_buff *msg;
6345         void *hdr;
6346         const u8 *addr;
6347         u64 cookie;
6348         int err;
6349
6350         if (wdev->iftype != NL80211_IFTYPE_AP &&
6351             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6352                 return -EOPNOTSUPP;
6353
6354         if (!info->attrs[NL80211_ATTR_MAC])
6355                 return -EINVAL;
6356
6357         if (!rdev->ops->probe_client)
6358                 return -EOPNOTSUPP;
6359
6360         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6361         if (!msg)
6362                 return -ENOMEM;
6363
6364         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6365                              NL80211_CMD_PROBE_CLIENT);
6366
6367         if (IS_ERR(hdr)) {
6368                 err = PTR_ERR(hdr);
6369                 goto free_msg;
6370         }
6371
6372         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6373
6374         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6375         if (err)
6376                 goto free_msg;
6377
6378         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6379                 goto nla_put_failure;
6380
6381         genlmsg_end(msg, hdr);
6382
6383         return genlmsg_reply(msg, info);
6384
6385  nla_put_failure:
6386         err = -ENOBUFS;
6387  free_msg:
6388         nlmsg_free(msg);
6389         return err;
6390 }
6391
6392 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6393 {
6394         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6395
6396         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6397                 return -EOPNOTSUPP;
6398
6399         if (rdev->ap_beacons_nlpid)
6400                 return -EBUSY;
6401
6402         rdev->ap_beacons_nlpid = info->snd_pid;
6403
6404         return 0;
6405 }
6406
6407 #define NL80211_FLAG_NEED_WIPHY         0x01
6408 #define NL80211_FLAG_NEED_NETDEV        0x02
6409 #define NL80211_FLAG_NEED_RTNL          0x04
6410 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6411 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6412                                          NL80211_FLAG_CHECK_NETDEV_UP)
6413
6414 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6415                             struct genl_info *info)
6416 {
6417         struct cfg80211_registered_device *rdev;
6418         struct net_device *dev;
6419         int err;
6420         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6421
6422         if (rtnl)
6423                 rtnl_lock();
6424
6425         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6426                 rdev = cfg80211_get_dev_from_info(info);
6427                 if (IS_ERR(rdev)) {
6428                         if (rtnl)
6429                                 rtnl_unlock();
6430                         return PTR_ERR(rdev);
6431                 }
6432                 info->user_ptr[0] = rdev;
6433         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6434                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6435                                               &rdev, &dev);
6436                 if (err) {
6437                         if (rtnl)
6438                                 rtnl_unlock();
6439                         return err;
6440                 }
6441                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6442                     !netif_running(dev)) {
6443                         cfg80211_unlock_rdev(rdev);
6444                         dev_put(dev);
6445                         if (rtnl)
6446                                 rtnl_unlock();
6447                         return -ENETDOWN;
6448                 }
6449                 info->user_ptr[0] = rdev;
6450                 info->user_ptr[1] = dev;
6451         }
6452
6453         return 0;
6454 }
6455
6456 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6457                               struct genl_info *info)
6458 {
6459         if (info->user_ptr[0])
6460                 cfg80211_unlock_rdev(info->user_ptr[0]);
6461         if (info->user_ptr[1])
6462                 dev_put(info->user_ptr[1]);
6463         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6464                 rtnl_unlock();
6465 }
6466
6467 static struct genl_ops nl80211_ops[] = {
6468         {
6469                 .cmd = NL80211_CMD_GET_WIPHY,
6470                 .doit = nl80211_get_wiphy,
6471                 .dumpit = nl80211_dump_wiphy,
6472                 .policy = nl80211_policy,
6473                 /* can be retrieved by unprivileged users */
6474                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6475         },
6476         {
6477                 .cmd = NL80211_CMD_SET_WIPHY,
6478                 .doit = nl80211_set_wiphy,
6479                 .policy = nl80211_policy,
6480                 .flags = GENL_ADMIN_PERM,
6481                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6482         },
6483         {
6484                 .cmd = NL80211_CMD_GET_INTERFACE,
6485                 .doit = nl80211_get_interface,
6486                 .dumpit = nl80211_dump_interface,
6487                 .policy = nl80211_policy,
6488                 /* can be retrieved by unprivileged users */
6489                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6490         },
6491         {
6492                 .cmd = NL80211_CMD_SET_INTERFACE,
6493                 .doit = nl80211_set_interface,
6494                 .policy = nl80211_policy,
6495                 .flags = GENL_ADMIN_PERM,
6496                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6497                                   NL80211_FLAG_NEED_RTNL,
6498         },
6499         {
6500                 .cmd = NL80211_CMD_NEW_INTERFACE,
6501                 .doit = nl80211_new_interface,
6502                 .policy = nl80211_policy,
6503                 .flags = GENL_ADMIN_PERM,
6504                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6505                                   NL80211_FLAG_NEED_RTNL,
6506         },
6507         {
6508                 .cmd = NL80211_CMD_DEL_INTERFACE,
6509                 .doit = nl80211_del_interface,
6510                 .policy = nl80211_policy,
6511                 .flags = GENL_ADMIN_PERM,
6512                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6513                                   NL80211_FLAG_NEED_RTNL,
6514         },
6515         {
6516                 .cmd = NL80211_CMD_GET_KEY,
6517                 .doit = nl80211_get_key,
6518                 .policy = nl80211_policy,
6519                 .flags = GENL_ADMIN_PERM,
6520                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6521                                   NL80211_FLAG_NEED_RTNL,
6522         },
6523         {
6524                 .cmd = NL80211_CMD_SET_KEY,
6525                 .doit = nl80211_set_key,
6526                 .policy = nl80211_policy,
6527                 .flags = GENL_ADMIN_PERM,
6528                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6529                                   NL80211_FLAG_NEED_RTNL,
6530         },
6531         {
6532                 .cmd = NL80211_CMD_NEW_KEY,
6533                 .doit = nl80211_new_key,
6534                 .policy = nl80211_policy,
6535                 .flags = GENL_ADMIN_PERM,
6536                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6537                                   NL80211_FLAG_NEED_RTNL,
6538         },
6539         {
6540                 .cmd = NL80211_CMD_DEL_KEY,
6541                 .doit = nl80211_del_key,
6542                 .policy = nl80211_policy,
6543                 .flags = GENL_ADMIN_PERM,
6544                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6545                                   NL80211_FLAG_NEED_RTNL,
6546         },
6547         {
6548                 .cmd = NL80211_CMD_SET_BEACON,
6549                 .policy = nl80211_policy,
6550                 .flags = GENL_ADMIN_PERM,
6551                 .doit = nl80211_set_beacon,
6552                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6553                                   NL80211_FLAG_NEED_RTNL,
6554         },
6555         {
6556                 .cmd = NL80211_CMD_START_AP,
6557                 .policy = nl80211_policy,
6558                 .flags = GENL_ADMIN_PERM,
6559                 .doit = nl80211_start_ap,
6560                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6561                                   NL80211_FLAG_NEED_RTNL,
6562         },
6563         {
6564                 .cmd = NL80211_CMD_STOP_AP,
6565                 .policy = nl80211_policy,
6566                 .flags = GENL_ADMIN_PERM,
6567                 .doit = nl80211_stop_ap,
6568                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6569                                   NL80211_FLAG_NEED_RTNL,
6570         },
6571         {
6572                 .cmd = NL80211_CMD_GET_STATION,
6573                 .doit = nl80211_get_station,
6574                 .dumpit = nl80211_dump_station,
6575                 .policy = nl80211_policy,
6576                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6577                                   NL80211_FLAG_NEED_RTNL,
6578         },
6579         {
6580                 .cmd = NL80211_CMD_SET_STATION,
6581                 .doit = nl80211_set_station,
6582                 .policy = nl80211_policy,
6583                 .flags = GENL_ADMIN_PERM,
6584                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6585                                   NL80211_FLAG_NEED_RTNL,
6586         },
6587         {
6588                 .cmd = NL80211_CMD_NEW_STATION,
6589                 .doit = nl80211_new_station,
6590                 .policy = nl80211_policy,
6591                 .flags = GENL_ADMIN_PERM,
6592                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6593                                   NL80211_FLAG_NEED_RTNL,
6594         },
6595         {
6596                 .cmd = NL80211_CMD_DEL_STATION,
6597                 .doit = nl80211_del_station,
6598                 .policy = nl80211_policy,
6599                 .flags = GENL_ADMIN_PERM,
6600                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6601                                   NL80211_FLAG_NEED_RTNL,
6602         },
6603         {
6604                 .cmd = NL80211_CMD_GET_MPATH,
6605                 .doit = nl80211_get_mpath,
6606                 .dumpit = nl80211_dump_mpath,
6607                 .policy = nl80211_policy,
6608                 .flags = GENL_ADMIN_PERM,
6609                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6610                                   NL80211_FLAG_NEED_RTNL,
6611         },
6612         {
6613                 .cmd = NL80211_CMD_SET_MPATH,
6614                 .doit = nl80211_set_mpath,
6615                 .policy = nl80211_policy,
6616                 .flags = GENL_ADMIN_PERM,
6617                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6618                                   NL80211_FLAG_NEED_RTNL,
6619         },
6620         {
6621                 .cmd = NL80211_CMD_NEW_MPATH,
6622                 .doit = nl80211_new_mpath,
6623                 .policy = nl80211_policy,
6624                 .flags = GENL_ADMIN_PERM,
6625                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6626                                   NL80211_FLAG_NEED_RTNL,
6627         },
6628         {
6629                 .cmd = NL80211_CMD_DEL_MPATH,
6630                 .doit = nl80211_del_mpath,
6631                 .policy = nl80211_policy,
6632                 .flags = GENL_ADMIN_PERM,
6633                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6634                                   NL80211_FLAG_NEED_RTNL,
6635         },
6636         {
6637                 .cmd = NL80211_CMD_SET_BSS,
6638                 .doit = nl80211_set_bss,
6639                 .policy = nl80211_policy,
6640                 .flags = GENL_ADMIN_PERM,
6641                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6642                                   NL80211_FLAG_NEED_RTNL,
6643         },
6644         {
6645                 .cmd = NL80211_CMD_GET_REG,
6646                 .doit = nl80211_get_reg,
6647                 .policy = nl80211_policy,
6648                 /* can be retrieved by unprivileged users */
6649         },
6650         {
6651                 .cmd = NL80211_CMD_SET_REG,
6652                 .doit = nl80211_set_reg,
6653                 .policy = nl80211_policy,
6654                 .flags = GENL_ADMIN_PERM,
6655         },
6656         {
6657                 .cmd = NL80211_CMD_REQ_SET_REG,
6658                 .doit = nl80211_req_set_reg,
6659                 .policy = nl80211_policy,
6660                 .flags = GENL_ADMIN_PERM,
6661         },
6662         {
6663                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6664                 .doit = nl80211_get_mesh_config,
6665                 .policy = nl80211_policy,
6666                 /* can be retrieved by unprivileged users */
6667                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6668                                   NL80211_FLAG_NEED_RTNL,
6669         },
6670         {
6671                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6672                 .doit = nl80211_update_mesh_config,
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_TRIGGER_SCAN,
6680                 .doit = nl80211_trigger_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_GET_SCAN,
6688                 .policy = nl80211_policy,
6689                 .dumpit = nl80211_dump_scan,
6690         },
6691         {
6692                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6693                 .doit = nl80211_start_sched_scan,
6694                 .policy = nl80211_policy,
6695                 .flags = GENL_ADMIN_PERM,
6696                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6697                                   NL80211_FLAG_NEED_RTNL,
6698         },
6699         {
6700                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6701                 .doit = nl80211_stop_sched_scan,
6702                 .policy = nl80211_policy,
6703                 .flags = GENL_ADMIN_PERM,
6704                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6705                                   NL80211_FLAG_NEED_RTNL,
6706         },
6707         {
6708                 .cmd = NL80211_CMD_AUTHENTICATE,
6709                 .doit = nl80211_authenticate,
6710                 .policy = nl80211_policy,
6711                 .flags = GENL_ADMIN_PERM,
6712                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6713                                   NL80211_FLAG_NEED_RTNL,
6714         },
6715         {
6716                 .cmd = NL80211_CMD_ASSOCIATE,
6717                 .doit = nl80211_associate,
6718                 .policy = nl80211_policy,
6719                 .flags = GENL_ADMIN_PERM,
6720                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6721                                   NL80211_FLAG_NEED_RTNL,
6722         },
6723         {
6724                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6725                 .doit = nl80211_deauthenticate,
6726                 .policy = nl80211_policy,
6727                 .flags = GENL_ADMIN_PERM,
6728                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6729                                   NL80211_FLAG_NEED_RTNL,
6730         },
6731         {
6732                 .cmd = NL80211_CMD_DISASSOCIATE,
6733                 .doit = nl80211_disassociate,
6734                 .policy = nl80211_policy,
6735                 .flags = GENL_ADMIN_PERM,
6736                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6737                                   NL80211_FLAG_NEED_RTNL,
6738         },
6739         {
6740                 .cmd = NL80211_CMD_JOIN_IBSS,
6741                 .doit = nl80211_join_ibss,
6742                 .policy = nl80211_policy,
6743                 .flags = GENL_ADMIN_PERM,
6744                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6745                                   NL80211_FLAG_NEED_RTNL,
6746         },
6747         {
6748                 .cmd = NL80211_CMD_LEAVE_IBSS,
6749                 .doit = nl80211_leave_ibss,
6750                 .policy = nl80211_policy,
6751                 .flags = GENL_ADMIN_PERM,
6752                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6753                                   NL80211_FLAG_NEED_RTNL,
6754         },
6755 #ifdef CONFIG_NL80211_TESTMODE
6756         {
6757                 .cmd = NL80211_CMD_TESTMODE,
6758                 .doit = nl80211_testmode_do,
6759                 .dumpit = nl80211_testmode_dump,
6760                 .policy = nl80211_policy,
6761                 .flags = GENL_ADMIN_PERM,
6762                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6763                                   NL80211_FLAG_NEED_RTNL,
6764         },
6765 #endif
6766         {
6767                 .cmd = NL80211_CMD_CONNECT,
6768                 .doit = nl80211_connect,
6769                 .policy = nl80211_policy,
6770                 .flags = GENL_ADMIN_PERM,
6771                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6772                                   NL80211_FLAG_NEED_RTNL,
6773         },
6774         {
6775                 .cmd = NL80211_CMD_DISCONNECT,
6776                 .doit = nl80211_disconnect,
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_SET_WIPHY_NETNS,
6784                 .doit = nl80211_wiphy_netns,
6785                 .policy = nl80211_policy,
6786                 .flags = GENL_ADMIN_PERM,
6787                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6788                                   NL80211_FLAG_NEED_RTNL,
6789         },
6790         {
6791                 .cmd = NL80211_CMD_GET_SURVEY,
6792                 .policy = nl80211_policy,
6793                 .dumpit = nl80211_dump_survey,
6794         },
6795         {
6796                 .cmd = NL80211_CMD_SET_PMKSA,
6797                 .doit = nl80211_setdel_pmksa,
6798                 .policy = nl80211_policy,
6799                 .flags = GENL_ADMIN_PERM,
6800                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6801                                   NL80211_FLAG_NEED_RTNL,
6802         },
6803         {
6804                 .cmd = NL80211_CMD_DEL_PMKSA,
6805                 .doit = nl80211_setdel_pmksa,
6806                 .policy = nl80211_policy,
6807                 .flags = GENL_ADMIN_PERM,
6808                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6809                                   NL80211_FLAG_NEED_RTNL,
6810         },
6811         {
6812                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6813                 .doit = nl80211_flush_pmksa,
6814                 .policy = nl80211_policy,
6815                 .flags = GENL_ADMIN_PERM,
6816                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6817                                   NL80211_FLAG_NEED_RTNL,
6818         },
6819         {
6820                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6821                 .doit = nl80211_remain_on_channel,
6822                 .policy = nl80211_policy,
6823                 .flags = GENL_ADMIN_PERM,
6824                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6825                                   NL80211_FLAG_NEED_RTNL,
6826         },
6827         {
6828                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6829                 .doit = nl80211_cancel_remain_on_channel,
6830                 .policy = nl80211_policy,
6831                 .flags = GENL_ADMIN_PERM,
6832                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6833                                   NL80211_FLAG_NEED_RTNL,
6834         },
6835         {
6836                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6837                 .doit = nl80211_set_tx_bitrate_mask,
6838                 .policy = nl80211_policy,
6839                 .flags = GENL_ADMIN_PERM,
6840                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6841                                   NL80211_FLAG_NEED_RTNL,
6842         },
6843         {
6844                 .cmd = NL80211_CMD_REGISTER_FRAME,
6845                 .doit = nl80211_register_mgmt,
6846                 .policy = nl80211_policy,
6847                 .flags = GENL_ADMIN_PERM,
6848                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6849                                   NL80211_FLAG_NEED_RTNL,
6850         },
6851         {
6852                 .cmd = NL80211_CMD_FRAME,
6853                 .doit = nl80211_tx_mgmt,
6854                 .policy = nl80211_policy,
6855                 .flags = GENL_ADMIN_PERM,
6856                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6857                                   NL80211_FLAG_NEED_RTNL,
6858         },
6859         {
6860                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6861                 .doit = nl80211_tx_mgmt_cancel_wait,
6862                 .policy = nl80211_policy,
6863                 .flags = GENL_ADMIN_PERM,
6864                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6865                                   NL80211_FLAG_NEED_RTNL,
6866         },
6867         {
6868                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6869                 .doit = nl80211_set_power_save,
6870                 .policy = nl80211_policy,
6871                 .flags = GENL_ADMIN_PERM,
6872                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6873                                   NL80211_FLAG_NEED_RTNL,
6874         },
6875         {
6876                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6877                 .doit = nl80211_get_power_save,
6878                 .policy = nl80211_policy,
6879                 /* can be retrieved by unprivileged users */
6880                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6881                                   NL80211_FLAG_NEED_RTNL,
6882         },
6883         {
6884                 .cmd = NL80211_CMD_SET_CQM,
6885                 .doit = nl80211_set_cqm,
6886                 .policy = nl80211_policy,
6887                 .flags = GENL_ADMIN_PERM,
6888                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6889                                   NL80211_FLAG_NEED_RTNL,
6890         },
6891         {
6892                 .cmd = NL80211_CMD_SET_CHANNEL,
6893                 .doit = nl80211_set_channel,
6894                 .policy = nl80211_policy,
6895                 .flags = GENL_ADMIN_PERM,
6896                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6897                                   NL80211_FLAG_NEED_RTNL,
6898         },
6899         {
6900                 .cmd = NL80211_CMD_SET_WDS_PEER,
6901                 .doit = nl80211_set_wds_peer,
6902                 .policy = nl80211_policy,
6903                 .flags = GENL_ADMIN_PERM,
6904                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6905                                   NL80211_FLAG_NEED_RTNL,
6906         },
6907         {
6908                 .cmd = NL80211_CMD_JOIN_MESH,
6909                 .doit = nl80211_join_mesh,
6910                 .policy = nl80211_policy,
6911                 .flags = GENL_ADMIN_PERM,
6912                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6913                                   NL80211_FLAG_NEED_RTNL,
6914         },
6915         {
6916                 .cmd = NL80211_CMD_LEAVE_MESH,
6917                 .doit = nl80211_leave_mesh,
6918                 .policy = nl80211_policy,
6919                 .flags = GENL_ADMIN_PERM,
6920                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6921                                   NL80211_FLAG_NEED_RTNL,
6922         },
6923         {
6924                 .cmd = NL80211_CMD_GET_WOWLAN,
6925                 .doit = nl80211_get_wowlan,
6926                 .policy = nl80211_policy,
6927                 /* can be retrieved by unprivileged users */
6928                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6929                                   NL80211_FLAG_NEED_RTNL,
6930         },
6931         {
6932                 .cmd = NL80211_CMD_SET_WOWLAN,
6933                 .doit = nl80211_set_wowlan,
6934                 .policy = nl80211_policy,
6935                 .flags = GENL_ADMIN_PERM,
6936                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6937                                   NL80211_FLAG_NEED_RTNL,
6938         },
6939         {
6940                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6941                 .doit = nl80211_set_rekey_data,
6942                 .policy = nl80211_policy,
6943                 .flags = GENL_ADMIN_PERM,
6944                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6945                                   NL80211_FLAG_NEED_RTNL,
6946         },
6947         {
6948                 .cmd = NL80211_CMD_TDLS_MGMT,
6949                 .doit = nl80211_tdls_mgmt,
6950                 .policy = nl80211_policy,
6951                 .flags = GENL_ADMIN_PERM,
6952                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6953                                   NL80211_FLAG_NEED_RTNL,
6954         },
6955         {
6956                 .cmd = NL80211_CMD_TDLS_OPER,
6957                 .doit = nl80211_tdls_oper,
6958                 .policy = nl80211_policy,
6959                 .flags = GENL_ADMIN_PERM,
6960                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6961                                   NL80211_FLAG_NEED_RTNL,
6962         },
6963         {
6964                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6965                 .doit = nl80211_register_unexpected_frame,
6966                 .policy = nl80211_policy,
6967                 .flags = GENL_ADMIN_PERM,
6968                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6969                                   NL80211_FLAG_NEED_RTNL,
6970         },
6971         {
6972                 .cmd = NL80211_CMD_PROBE_CLIENT,
6973                 .doit = nl80211_probe_client,
6974                 .policy = nl80211_policy,
6975                 .flags = GENL_ADMIN_PERM,
6976                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6977                                   NL80211_FLAG_NEED_RTNL,
6978         },
6979         {
6980                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6981                 .doit = nl80211_register_beacons,
6982                 .policy = nl80211_policy,
6983                 .flags = GENL_ADMIN_PERM,
6984                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6985                                   NL80211_FLAG_NEED_RTNL,
6986         },
6987         {
6988                 .cmd = NL80211_CMD_SET_NOACK_MAP,
6989                 .doit = nl80211_set_noack_map,
6990                 .policy = nl80211_policy,
6991                 .flags = GENL_ADMIN_PERM,
6992                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6993                                   NL80211_FLAG_NEED_RTNL,
6994         },
6995
6996 };
6997
6998 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6999         .name = "mlme",
7000 };
7001
7002 /* multicast groups */
7003 static struct genl_multicast_group nl80211_config_mcgrp = {
7004         .name = "config",
7005 };
7006 static struct genl_multicast_group nl80211_scan_mcgrp = {
7007         .name = "scan",
7008 };
7009 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7010         .name = "regulatory",
7011 };
7012
7013 /* notification functions */
7014
7015 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7016 {
7017         struct sk_buff *msg;
7018
7019         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7020         if (!msg)
7021                 return;
7022
7023         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7024                 nlmsg_free(msg);
7025                 return;
7026         }
7027
7028         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7029                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7030 }
7031
7032 static int nl80211_add_scan_req(struct sk_buff *msg,
7033                                 struct cfg80211_registered_device *rdev)
7034 {
7035         struct cfg80211_scan_request *req = rdev->scan_req;
7036         struct nlattr *nest;
7037         int i;
7038
7039         ASSERT_RDEV_LOCK(rdev);
7040
7041         if (WARN_ON(!req))
7042                 return 0;
7043
7044         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7045         if (!nest)
7046                 goto nla_put_failure;
7047         for (i = 0; i < req->n_ssids; i++) {
7048                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7049                         goto nla_put_failure;
7050         }
7051         nla_nest_end(msg, nest);
7052
7053         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7054         if (!nest)
7055                 goto nla_put_failure;
7056         for (i = 0; i < req->n_channels; i++) {
7057                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7058                         goto nla_put_failure;
7059         }
7060         nla_nest_end(msg, nest);
7061
7062         if (req->ie &&
7063             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7064                 goto nla_put_failure;
7065
7066         return 0;
7067  nla_put_failure:
7068         return -ENOBUFS;
7069 }
7070
7071 static int nl80211_send_scan_msg(struct sk_buff *msg,
7072                                  struct cfg80211_registered_device *rdev,
7073                                  struct net_device *netdev,
7074                                  u32 pid, u32 seq, int flags,
7075                                  u32 cmd)
7076 {
7077         void *hdr;
7078
7079         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7080         if (!hdr)
7081                 return -1;
7082
7083         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7084             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7085                 goto nla_put_failure;
7086
7087         /* ignore errors and send incomplete event anyway */
7088         nl80211_add_scan_req(msg, rdev);
7089
7090         return genlmsg_end(msg, hdr);
7091
7092  nla_put_failure:
7093         genlmsg_cancel(msg, hdr);
7094         return -EMSGSIZE;
7095 }
7096
7097 static int
7098 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7099                             struct cfg80211_registered_device *rdev,
7100                             struct net_device *netdev,
7101                             u32 pid, u32 seq, int flags, u32 cmd)
7102 {
7103         void *hdr;
7104
7105         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7106         if (!hdr)
7107                 return -1;
7108
7109         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7110             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7111                 goto nla_put_failure;
7112
7113         return genlmsg_end(msg, hdr);
7114
7115  nla_put_failure:
7116         genlmsg_cancel(msg, hdr);
7117         return -EMSGSIZE;
7118 }
7119
7120 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7121                              struct net_device *netdev)
7122 {
7123         struct sk_buff *msg;
7124
7125         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7126         if (!msg)
7127                 return;
7128
7129         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7130                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7131                 nlmsg_free(msg);
7132                 return;
7133         }
7134
7135         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7136                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7137 }
7138
7139 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7140                             struct net_device *netdev)
7141 {
7142         struct sk_buff *msg;
7143
7144         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7145         if (!msg)
7146                 return;
7147
7148         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7149                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7150                 nlmsg_free(msg);
7151                 return;
7152         }
7153
7154         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7155                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7156 }
7157
7158 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7159                                struct net_device *netdev)
7160 {
7161         struct sk_buff *msg;
7162
7163         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7164         if (!msg)
7165                 return;
7166
7167         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7168                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7169                 nlmsg_free(msg);
7170                 return;
7171         }
7172
7173         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7174                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7175 }
7176
7177 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7178                                      struct net_device *netdev)
7179 {
7180         struct sk_buff *msg;
7181
7182         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7183         if (!msg)
7184                 return;
7185
7186         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7187                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7188                 nlmsg_free(msg);
7189                 return;
7190         }
7191
7192         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7193                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7194 }
7195
7196 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7197                              struct net_device *netdev, u32 cmd)
7198 {
7199         struct sk_buff *msg;
7200
7201         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7202         if (!msg)
7203                 return;
7204
7205         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7206                 nlmsg_free(msg);
7207                 return;
7208         }
7209
7210         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7211                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7212 }
7213
7214 /*
7215  * This can happen on global regulatory changes or device specific settings
7216  * based on custom world regulatory domains.
7217  */
7218 void nl80211_send_reg_change_event(struct regulatory_request *request)
7219 {
7220         struct sk_buff *msg;
7221         void *hdr;
7222
7223         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7224         if (!msg)
7225                 return;
7226
7227         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7228         if (!hdr) {
7229                 nlmsg_free(msg);
7230                 return;
7231         }
7232
7233         /* Userspace can always count this one always being set */
7234         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7235                 goto nla_put_failure;
7236
7237         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7238                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7239                                NL80211_REGDOM_TYPE_WORLD))
7240                         goto nla_put_failure;
7241         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7242                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7243                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7244                         goto nla_put_failure;
7245         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7246                    request->intersect) {
7247                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7248                                NL80211_REGDOM_TYPE_INTERSECTION))
7249                         goto nla_put_failure;
7250         } else {
7251                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7252                                NL80211_REGDOM_TYPE_COUNTRY) ||
7253                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7254                                    request->alpha2))
7255                         goto nla_put_failure;
7256         }
7257
7258         if (wiphy_idx_valid(request->wiphy_idx) &&
7259             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7260                 goto nla_put_failure;
7261
7262         genlmsg_end(msg, hdr);
7263
7264         rcu_read_lock();
7265         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7266                                 GFP_ATOMIC);
7267         rcu_read_unlock();
7268
7269         return;
7270
7271 nla_put_failure:
7272         genlmsg_cancel(msg, hdr);
7273         nlmsg_free(msg);
7274 }
7275
7276 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7277                                     struct net_device *netdev,
7278                                     const u8 *buf, size_t len,
7279                                     enum nl80211_commands cmd, gfp_t gfp)
7280 {
7281         struct sk_buff *msg;
7282         void *hdr;
7283
7284         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7285         if (!msg)
7286                 return;
7287
7288         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7289         if (!hdr) {
7290                 nlmsg_free(msg);
7291                 return;
7292         }
7293
7294         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7295             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7296             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7297                 goto nla_put_failure;
7298
7299         genlmsg_end(msg, hdr);
7300
7301         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7302                                 nl80211_mlme_mcgrp.id, gfp);
7303         return;
7304
7305  nla_put_failure:
7306         genlmsg_cancel(msg, hdr);
7307         nlmsg_free(msg);
7308 }
7309
7310 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7311                           struct net_device *netdev, const u8 *buf,
7312                           size_t len, gfp_t gfp)
7313 {
7314         nl80211_send_mlme_event(rdev, netdev, buf, len,
7315                                 NL80211_CMD_AUTHENTICATE, gfp);
7316 }
7317
7318 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7319                            struct net_device *netdev, const u8 *buf,
7320                            size_t len, gfp_t gfp)
7321 {
7322         nl80211_send_mlme_event(rdev, netdev, buf, len,
7323                                 NL80211_CMD_ASSOCIATE, gfp);
7324 }
7325
7326 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7327                          struct net_device *netdev, const u8 *buf,
7328                          size_t len, gfp_t gfp)
7329 {
7330         nl80211_send_mlme_event(rdev, netdev, buf, len,
7331                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7332 }
7333
7334 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7335                            struct net_device *netdev, const u8 *buf,
7336                            size_t len, gfp_t gfp)
7337 {
7338         nl80211_send_mlme_event(rdev, netdev, buf, len,
7339                                 NL80211_CMD_DISASSOCIATE, gfp);
7340 }
7341
7342 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7343                                 struct net_device *netdev, const u8 *buf,
7344                                 size_t len, gfp_t gfp)
7345 {
7346         nl80211_send_mlme_event(rdev, netdev, buf, len,
7347                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7348 }
7349
7350 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7351                                   struct net_device *netdev, const u8 *buf,
7352                                   size_t len, gfp_t gfp)
7353 {
7354         nl80211_send_mlme_event(rdev, netdev, buf, len,
7355                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7356 }
7357
7358 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7359                                       struct net_device *netdev, int cmd,
7360                                       const u8 *addr, gfp_t gfp)
7361 {
7362         struct sk_buff *msg;
7363         void *hdr;
7364
7365         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7366         if (!msg)
7367                 return;
7368
7369         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7370         if (!hdr) {
7371                 nlmsg_free(msg);
7372                 return;
7373         }
7374
7375         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7376             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7377             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7378             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7379                 goto nla_put_failure;
7380
7381         genlmsg_end(msg, hdr);
7382
7383         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7384                                 nl80211_mlme_mcgrp.id, gfp);
7385         return;
7386
7387  nla_put_failure:
7388         genlmsg_cancel(msg, hdr);
7389         nlmsg_free(msg);
7390 }
7391
7392 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7393                                struct net_device *netdev, const u8 *addr,
7394                                gfp_t gfp)
7395 {
7396         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7397                                   addr, gfp);
7398 }
7399
7400 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7401                                 struct net_device *netdev, const u8 *addr,
7402                                 gfp_t gfp)
7403 {
7404         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7405                                   addr, gfp);
7406 }
7407
7408 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7409                                  struct net_device *netdev, const u8 *bssid,
7410                                  const u8 *req_ie, size_t req_ie_len,
7411                                  const u8 *resp_ie, size_t resp_ie_len,
7412                                  u16 status, gfp_t gfp)
7413 {
7414         struct sk_buff *msg;
7415         void *hdr;
7416
7417         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7418         if (!msg)
7419                 return;
7420
7421         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7422         if (!hdr) {
7423                 nlmsg_free(msg);
7424                 return;
7425         }
7426
7427         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7428             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7429             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7430             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7431             (req_ie &&
7432              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7433             (resp_ie &&
7434              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7435                 goto nla_put_failure;
7436
7437         genlmsg_end(msg, hdr);
7438
7439         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7440                                 nl80211_mlme_mcgrp.id, gfp);
7441         return;
7442
7443  nla_put_failure:
7444         genlmsg_cancel(msg, hdr);
7445         nlmsg_free(msg);
7446
7447 }
7448
7449 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7450                          struct net_device *netdev, const u8 *bssid,
7451                          const u8 *req_ie, size_t req_ie_len,
7452                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7453 {
7454         struct sk_buff *msg;
7455         void *hdr;
7456
7457         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7458         if (!msg)
7459                 return;
7460
7461         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7462         if (!hdr) {
7463                 nlmsg_free(msg);
7464                 return;
7465         }
7466
7467         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7468             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7469             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7470             (req_ie &&
7471              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7472             (resp_ie &&
7473              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7474                 goto nla_put_failure;
7475
7476         genlmsg_end(msg, hdr);
7477
7478         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7479                                 nl80211_mlme_mcgrp.id, gfp);
7480         return;
7481
7482  nla_put_failure:
7483         genlmsg_cancel(msg, hdr);
7484         nlmsg_free(msg);
7485
7486 }
7487
7488 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7489                                struct net_device *netdev, u16 reason,
7490                                const u8 *ie, size_t ie_len, bool from_ap)
7491 {
7492         struct sk_buff *msg;
7493         void *hdr;
7494
7495         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7496         if (!msg)
7497                 return;
7498
7499         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7500         if (!hdr) {
7501                 nlmsg_free(msg);
7502                 return;
7503         }
7504
7505         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7506             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7507             (from_ap && reason &&
7508              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7509             (from_ap &&
7510              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7511             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7512                 goto nla_put_failure;
7513
7514         genlmsg_end(msg, hdr);
7515
7516         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7517                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7518         return;
7519
7520  nla_put_failure:
7521         genlmsg_cancel(msg, hdr);
7522         nlmsg_free(msg);
7523
7524 }
7525
7526 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7527                              struct net_device *netdev, const u8 *bssid,
7528                              gfp_t gfp)
7529 {
7530         struct sk_buff *msg;
7531         void *hdr;
7532
7533         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7534         if (!msg)
7535                 return;
7536
7537         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7538         if (!hdr) {
7539                 nlmsg_free(msg);
7540                 return;
7541         }
7542
7543         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7544             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7545             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7546                 goto nla_put_failure;
7547
7548         genlmsg_end(msg, hdr);
7549
7550         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7551                                 nl80211_mlme_mcgrp.id, gfp);
7552         return;
7553
7554  nla_put_failure:
7555         genlmsg_cancel(msg, hdr);
7556         nlmsg_free(msg);
7557 }
7558
7559 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7560                 struct net_device *netdev,
7561                 const u8 *macaddr, const u8* ie, u8 ie_len,
7562                 gfp_t gfp)
7563 {
7564         struct sk_buff *msg;
7565         void *hdr;
7566
7567         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7568         if (!msg)
7569                 return;
7570
7571         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7572         if (!hdr) {
7573                 nlmsg_free(msg);
7574                 return;
7575         }
7576
7577         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7578             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7579             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7580             (ie_len && ie &&
7581              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7582                 goto nla_put_failure;
7583
7584         genlmsg_end(msg, hdr);
7585
7586         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7587                                 nl80211_mlme_mcgrp.id, gfp);
7588         return;
7589
7590  nla_put_failure:
7591         genlmsg_cancel(msg, hdr);
7592         nlmsg_free(msg);
7593 }
7594
7595 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7596                                  struct net_device *netdev, const u8 *addr,
7597                                  enum nl80211_key_type key_type, int key_id,
7598                                  const u8 *tsc, gfp_t gfp)
7599 {
7600         struct sk_buff *msg;
7601         void *hdr;
7602
7603         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7604         if (!msg)
7605                 return;
7606
7607         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7608         if (!hdr) {
7609                 nlmsg_free(msg);
7610                 return;
7611         }
7612
7613         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7614             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7615             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7616             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7617             (key_id != -1 &&
7618              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7619             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7620                 goto nla_put_failure;
7621
7622         genlmsg_end(msg, hdr);
7623
7624         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7625                                 nl80211_mlme_mcgrp.id, gfp);
7626         return;
7627
7628  nla_put_failure:
7629         genlmsg_cancel(msg, hdr);
7630         nlmsg_free(msg);
7631 }
7632
7633 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7634                                     struct ieee80211_channel *channel_before,
7635                                     struct ieee80211_channel *channel_after)
7636 {
7637         struct sk_buff *msg;
7638         void *hdr;
7639         struct nlattr *nl_freq;
7640
7641         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7642         if (!msg)
7643                 return;
7644
7645         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7646         if (!hdr) {
7647                 nlmsg_free(msg);
7648                 return;
7649         }
7650
7651         /*
7652          * Since we are applying the beacon hint to a wiphy we know its
7653          * wiphy_idx is valid
7654          */
7655         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7656                 goto nla_put_failure;
7657
7658         /* Before */
7659         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7660         if (!nl_freq)
7661                 goto nla_put_failure;
7662         if (nl80211_msg_put_channel(msg, channel_before))
7663                 goto nla_put_failure;
7664         nla_nest_end(msg, nl_freq);
7665
7666         /* After */
7667         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7668         if (!nl_freq)
7669                 goto nla_put_failure;
7670         if (nl80211_msg_put_channel(msg, channel_after))
7671                 goto nla_put_failure;
7672         nla_nest_end(msg, nl_freq);
7673
7674         genlmsg_end(msg, hdr);
7675
7676         rcu_read_lock();
7677         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7678                                 GFP_ATOMIC);
7679         rcu_read_unlock();
7680
7681         return;
7682
7683 nla_put_failure:
7684         genlmsg_cancel(msg, hdr);
7685         nlmsg_free(msg);
7686 }
7687
7688 static void nl80211_send_remain_on_chan_event(
7689         int cmd, struct cfg80211_registered_device *rdev,
7690         struct net_device *netdev, u64 cookie,
7691         struct ieee80211_channel *chan,
7692         enum nl80211_channel_type channel_type,
7693         unsigned int duration, gfp_t gfp)
7694 {
7695         struct sk_buff *msg;
7696         void *hdr;
7697
7698         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7699         if (!msg)
7700                 return;
7701
7702         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7703         if (!hdr) {
7704                 nlmsg_free(msg);
7705                 return;
7706         }
7707
7708         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7709             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7710             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7711             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7712             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7713                 goto nla_put_failure;
7714
7715         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7716             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7717                 goto nla_put_failure;
7718
7719         genlmsg_end(msg, hdr);
7720
7721         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7722                                 nl80211_mlme_mcgrp.id, gfp);
7723         return;
7724
7725  nla_put_failure:
7726         genlmsg_cancel(msg, hdr);
7727         nlmsg_free(msg);
7728 }
7729
7730 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7731                                     struct net_device *netdev, u64 cookie,
7732                                     struct ieee80211_channel *chan,
7733                                     enum nl80211_channel_type channel_type,
7734                                     unsigned int duration, gfp_t gfp)
7735 {
7736         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7737                                           rdev, netdev, cookie, chan,
7738                                           channel_type, duration, gfp);
7739 }
7740
7741 void nl80211_send_remain_on_channel_cancel(
7742         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7743         u64 cookie, struct ieee80211_channel *chan,
7744         enum nl80211_channel_type channel_type, gfp_t gfp)
7745 {
7746         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7747                                           rdev, netdev, cookie, chan,
7748                                           channel_type, 0, gfp);
7749 }
7750
7751 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7752                             struct net_device *dev, const u8 *mac_addr,
7753                             struct station_info *sinfo, gfp_t gfp)
7754 {
7755         struct sk_buff *msg;
7756
7757         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7758         if (!msg)
7759                 return;
7760
7761         if (nl80211_send_station(msg, 0, 0, 0,
7762                                  rdev, dev, mac_addr, sinfo) < 0) {
7763                 nlmsg_free(msg);
7764                 return;
7765         }
7766
7767         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7768                                 nl80211_mlme_mcgrp.id, gfp);
7769 }
7770
7771 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7772                                 struct net_device *dev, const u8 *mac_addr,
7773                                 gfp_t gfp)
7774 {
7775         struct sk_buff *msg;
7776         void *hdr;
7777
7778         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7779         if (!msg)
7780                 return;
7781
7782         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7783         if (!hdr) {
7784                 nlmsg_free(msg);
7785                 return;
7786         }
7787
7788         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7789             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
7790                 goto nla_put_failure;
7791
7792         genlmsg_end(msg, hdr);
7793
7794         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7795                                 nl80211_mlme_mcgrp.id, gfp);
7796         return;
7797
7798  nla_put_failure:
7799         genlmsg_cancel(msg, hdr);
7800         nlmsg_free(msg);
7801 }
7802
7803 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7804                                        const u8 *addr, gfp_t gfp)
7805 {
7806         struct wireless_dev *wdev = dev->ieee80211_ptr;
7807         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7808         struct sk_buff *msg;
7809         void *hdr;
7810         int err;
7811         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7812
7813         if (!nlpid)
7814                 return false;
7815
7816         msg = nlmsg_new(100, gfp);
7817         if (!msg)
7818                 return true;
7819
7820         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7821         if (!hdr) {
7822                 nlmsg_free(msg);
7823                 return true;
7824         }
7825
7826         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7827             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7828             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7829                 goto nla_put_failure;
7830
7831         err = genlmsg_end(msg, hdr);
7832         if (err < 0) {
7833                 nlmsg_free(msg);
7834                 return true;
7835         }
7836
7837         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7838         return true;
7839
7840  nla_put_failure:
7841         genlmsg_cancel(msg, hdr);
7842         nlmsg_free(msg);
7843         return true;
7844 }
7845
7846 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7847 {
7848         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7849                                           addr, gfp);
7850 }
7851
7852 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7853                                     const u8 *addr, gfp_t gfp)
7854 {
7855         return __nl80211_unexpected_frame(dev,
7856                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7857                                           addr, gfp);
7858 }
7859
7860 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7861                       struct net_device *netdev, u32 nlpid,
7862                       int freq, int sig_dbm,
7863                       const u8 *buf, size_t len, gfp_t gfp)
7864 {
7865         struct sk_buff *msg;
7866         void *hdr;
7867
7868         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7869         if (!msg)
7870                 return -ENOMEM;
7871
7872         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7873         if (!hdr) {
7874                 nlmsg_free(msg);
7875                 return -ENOMEM;
7876         }
7877
7878         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7879             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7880             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
7881             (sig_dbm &&
7882              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
7883             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7884                 goto nla_put_failure;
7885
7886         genlmsg_end(msg, hdr);
7887
7888         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7889
7890  nla_put_failure:
7891         genlmsg_cancel(msg, hdr);
7892         nlmsg_free(msg);
7893         return -ENOBUFS;
7894 }
7895
7896 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7897                                  struct net_device *netdev, u64 cookie,
7898                                  const u8 *buf, size_t len, bool ack,
7899                                  gfp_t gfp)
7900 {
7901         struct sk_buff *msg;
7902         void *hdr;
7903
7904         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7905         if (!msg)
7906                 return;
7907
7908         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7909         if (!hdr) {
7910                 nlmsg_free(msg);
7911                 return;
7912         }
7913
7914         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7915             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7916             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
7917             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
7918             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
7919                 goto nla_put_failure;
7920
7921         genlmsg_end(msg, hdr);
7922
7923         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7924         return;
7925
7926  nla_put_failure:
7927         genlmsg_cancel(msg, hdr);
7928         nlmsg_free(msg);
7929 }
7930
7931 void
7932 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7933                              struct net_device *netdev,
7934                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7935                              gfp_t gfp)
7936 {
7937         struct sk_buff *msg;
7938         struct nlattr *pinfoattr;
7939         void *hdr;
7940
7941         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7942         if (!msg)
7943                 return;
7944
7945         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7946         if (!hdr) {
7947                 nlmsg_free(msg);
7948                 return;
7949         }
7950
7951         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7952             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7953                 goto nla_put_failure;
7954
7955         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7956         if (!pinfoattr)
7957                 goto nla_put_failure;
7958
7959         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7960                         rssi_event))
7961                 goto nla_put_failure;
7962
7963         nla_nest_end(msg, pinfoattr);
7964
7965         genlmsg_end(msg, hdr);
7966
7967         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7968                                 nl80211_mlme_mcgrp.id, gfp);
7969         return;
7970
7971  nla_put_failure:
7972         genlmsg_cancel(msg, hdr);
7973         nlmsg_free(msg);
7974 }
7975
7976 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7977                               struct net_device *netdev, const u8 *bssid,
7978                               const u8 *replay_ctr, gfp_t gfp)
7979 {
7980         struct sk_buff *msg;
7981         struct nlattr *rekey_attr;
7982         void *hdr;
7983
7984         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7985         if (!msg)
7986                 return;
7987
7988         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7989         if (!hdr) {
7990                 nlmsg_free(msg);
7991                 return;
7992         }
7993
7994         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7995             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7996             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7997                 goto nla_put_failure;
7998
7999         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8000         if (!rekey_attr)
8001                 goto nla_put_failure;
8002
8003         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8004                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8005                 goto nla_put_failure;
8006
8007         nla_nest_end(msg, rekey_attr);
8008
8009         genlmsg_end(msg, hdr);
8010
8011         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8012                                 nl80211_mlme_mcgrp.id, gfp);
8013         return;
8014
8015  nla_put_failure:
8016         genlmsg_cancel(msg, hdr);
8017         nlmsg_free(msg);
8018 }
8019
8020 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8021                                     struct net_device *netdev, int index,
8022                                     const u8 *bssid, bool preauth, gfp_t gfp)
8023 {
8024         struct sk_buff *msg;
8025         struct nlattr *attr;
8026         void *hdr;
8027
8028         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8029         if (!msg)
8030                 return;
8031
8032         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8033         if (!hdr) {
8034                 nlmsg_free(msg);
8035                 return;
8036         }
8037
8038         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8039             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8040                 goto nla_put_failure;
8041
8042         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8043         if (!attr)
8044                 goto nla_put_failure;
8045
8046         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8047             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8048             (preauth &&
8049              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8050                 goto nla_put_failure;
8051
8052         nla_nest_end(msg, attr);
8053
8054         genlmsg_end(msg, hdr);
8055
8056         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8057                                 nl80211_mlme_mcgrp.id, gfp);
8058         return;
8059
8060  nla_put_failure:
8061         genlmsg_cancel(msg, hdr);
8062         nlmsg_free(msg);
8063 }
8064
8065 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8066                               struct net_device *netdev, int freq,
8067                               enum nl80211_channel_type type, gfp_t gfp)
8068 {
8069         struct sk_buff *msg;
8070         void *hdr;
8071
8072         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8073         if (!msg)
8074                 return;
8075
8076         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8077         if (!hdr) {
8078                 nlmsg_free(msg);
8079                 return;
8080         }
8081
8082         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8083             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8084             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8085                 goto nla_put_failure;
8086
8087         genlmsg_end(msg, hdr);
8088
8089         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8090                                 nl80211_mlme_mcgrp.id, gfp);
8091         return;
8092
8093  nla_put_failure:
8094         genlmsg_cancel(msg, hdr);
8095         nlmsg_free(msg);
8096 }
8097
8098 void
8099 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8100                                 struct net_device *netdev, const u8 *peer,
8101                                 u32 num_packets, gfp_t gfp)
8102 {
8103         struct sk_buff *msg;
8104         struct nlattr *pinfoattr;
8105         void *hdr;
8106
8107         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8108         if (!msg)
8109                 return;
8110
8111         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8112         if (!hdr) {
8113                 nlmsg_free(msg);
8114                 return;
8115         }
8116
8117         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8118             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8119             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8120                 goto nla_put_failure;
8121
8122         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8123         if (!pinfoattr)
8124                 goto nla_put_failure;
8125
8126         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8127                 goto nla_put_failure;
8128
8129         nla_nest_end(msg, pinfoattr);
8130
8131         genlmsg_end(msg, hdr);
8132
8133         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8134                                 nl80211_mlme_mcgrp.id, gfp);
8135         return;
8136
8137  nla_put_failure:
8138         genlmsg_cancel(msg, hdr);
8139         nlmsg_free(msg);
8140 }
8141
8142 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8143                            u64 cookie, bool acked, gfp_t gfp)
8144 {
8145         struct wireless_dev *wdev = dev->ieee80211_ptr;
8146         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8147         struct sk_buff *msg;
8148         void *hdr;
8149         int err;
8150
8151         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8152         if (!msg)
8153                 return;
8154
8155         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8156         if (!hdr) {
8157                 nlmsg_free(msg);
8158                 return;
8159         }
8160
8161         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8162             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8163             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8164             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8165             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8166                 goto nla_put_failure;
8167
8168         err = genlmsg_end(msg, hdr);
8169         if (err < 0) {
8170                 nlmsg_free(msg);
8171                 return;
8172         }
8173
8174         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8175                                 nl80211_mlme_mcgrp.id, gfp);
8176         return;
8177
8178  nla_put_failure:
8179         genlmsg_cancel(msg, hdr);
8180         nlmsg_free(msg);
8181 }
8182 EXPORT_SYMBOL(cfg80211_probe_status);
8183
8184 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8185                                  const u8 *frame, size_t len,
8186                                  int freq, int sig_dbm, gfp_t gfp)
8187 {
8188         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8189         struct sk_buff *msg;
8190         void *hdr;
8191         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8192
8193         if (!nlpid)
8194                 return;
8195
8196         msg = nlmsg_new(len + 100, gfp);
8197         if (!msg)
8198                 return;
8199
8200         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8201         if (!hdr) {
8202                 nlmsg_free(msg);
8203                 return;
8204         }
8205
8206         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8207             (freq &&
8208              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8209             (sig_dbm &&
8210              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8211             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8212                 goto nla_put_failure;
8213
8214         genlmsg_end(msg, hdr);
8215
8216         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8217         return;
8218
8219  nla_put_failure:
8220         genlmsg_cancel(msg, hdr);
8221         nlmsg_free(msg);
8222 }
8223 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8224
8225 static int nl80211_netlink_notify(struct notifier_block * nb,
8226                                   unsigned long state,
8227                                   void *_notify)
8228 {
8229         struct netlink_notify *notify = _notify;
8230         struct cfg80211_registered_device *rdev;
8231         struct wireless_dev *wdev;
8232
8233         if (state != NETLINK_URELEASE)
8234                 return NOTIFY_DONE;
8235
8236         rcu_read_lock();
8237
8238         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8239                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8240                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8241                 if (rdev->ap_beacons_nlpid == notify->pid)
8242                         rdev->ap_beacons_nlpid = 0;
8243         }
8244
8245         rcu_read_unlock();
8246
8247         return NOTIFY_DONE;
8248 }
8249
8250 static struct notifier_block nl80211_netlink_notifier = {
8251         .notifier_call = nl80211_netlink_notify,
8252 };
8253
8254 /* initialisation/exit functions */
8255
8256 int nl80211_init(void)
8257 {
8258         int err;
8259
8260         err = genl_register_family_with_ops(&nl80211_fam,
8261                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8262         if (err)
8263                 return err;
8264
8265         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8266         if (err)
8267                 goto err_out;
8268
8269         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8270         if (err)
8271                 goto err_out;
8272
8273         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8274         if (err)
8275                 goto err_out;
8276
8277         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8278         if (err)
8279                 goto err_out;
8280
8281 #ifdef CONFIG_NL80211_TESTMODE
8282         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8283         if (err)
8284                 goto err_out;
8285 #endif
8286
8287         err = netlink_register_notifier(&nl80211_netlink_notifier);
8288         if (err)
8289                 goto err_out;
8290
8291         return 0;
8292  err_out:
8293         genl_unregister_family(&nl80211_fam);
8294         return err;
8295 }
8296
8297 void nl80211_exit(void)
8298 {
8299         netlink_unregister_notifier(&nl80211_netlink_notifier);
8300         genl_unregister_family(&nl80211_fam);
8301 }