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_info_ifindex(struct genl_info *info,
  51                                        struct cfg80211_registered_device **rdev,
  52                                        struct net_device **dev)
  53 {
  54         struct nlattr **attrs = info->attrs;
  55         int ifindex;
  56
  57         if (!attrs[NL80211_ATTR_IFINDEX])
  58                 return -EINVAL;
  59
  60         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  61         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  62         if (!*dev)
  63                 return -ENODEV;
  64
  65         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  66         if (IS_ERR(*rdev)) {
  67                 dev_put(*dev);
  68                 return PTR_ERR(*rdev);
  69         }
  70
  71         return 0;
  72 }
  73
  74 /* policy for the attributes */
  75 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  76         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  77         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  78                                       .len = 20-1 },
  79         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  80         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  81         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  82         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  83         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  84         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  85         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  86         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  87
  88         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  89         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  90         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  91
  92         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  93         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  94
  95         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  96         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  97                                     .len = WLAN_MAX_KEY_LEN },
  98         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  99         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 100         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 101         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 102         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 103
 104         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 105         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 106         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 107                                        .len = IEEE80211_MAX_DATA_LEN },
 108         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 109                                        .len = IEEE80211_MAX_DATA_LEN },
 110         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 111         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 112         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 113         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 114                                                .len = NL80211_MAX_SUPP_RATES },
 115         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 116         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 117         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 118         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 119                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 120         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 121
 122         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 123         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 124
 125         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 126         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 127         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 128         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 129                                            .len = NL80211_MAX_SUPP_RATES },
 130         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 131
 132         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 133         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 134
 135         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 136
 137         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 138         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 139                               .len = IEEE80211_MAX_DATA_LEN },
 140         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 141         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 142
 143         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 144                                 .len = IEEE80211_MAX_SSID_LEN },
 145         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 146         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 147         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 149         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 150         [NL80211_ATTR_STA_FLAGS2] = {
 151                 .len = sizeof(struct nl80211_sta_flag_update),
 152         },
 153         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 154         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 155         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 156         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 157         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 158         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 159         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 160         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 161         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 162                                  .len = WLAN_PMKID_LEN },
 163         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 164         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 165         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 166         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 167                                  .len = IEEE80211_MAX_DATA_LEN },
 168         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 169         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 170         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 171         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 172         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 173         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 174         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 175         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 176         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 178         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 179         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 180         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 181         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 182         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 183         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 184         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 185         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 186         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 187         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 188                                          .len = IEEE80211_MAX_DATA_LEN },
 189         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 190                                          .len = IEEE80211_MAX_DATA_LEN },
 191         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 192         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 193         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 194         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 195         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 196         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 197         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 198         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 199         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 200         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 201                                       .len = IEEE80211_MAX_DATA_LEN },
 202 };
 203
 204 /* policy for the key attributes */
 205 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 206         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 207         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 208         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 209         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 210         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 211         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 212         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 213         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 214 };
 215
 216 /* policy for the key default flags */
 217 static const struct nla_policy
 218 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 219         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 220         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 221 };
 222
 223 /* policy for WoWLAN attributes */
 224 static const struct nla_policy
 225 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 226         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 227         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 228         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 229         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 230         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 231         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 232         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 233         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 234 };
 235
 236 /* policy for GTK rekey offload attributes */
 237 static const struct nla_policy
 238 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 239         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 240         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 241         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 242 };
 243
 244 static const struct nla_policy
 245 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 246         [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
 247                                                  .len = IEEE80211_MAX_SSID_LEN },
 248 };
 249
 250 /* ifidx get helper */
 251 static int nl80211_get_ifidx(struct netlink_callback *cb)
 252 {
 253         int res;
 254
 255         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 256                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 257                           nl80211_policy);
 258         if (res)
 259                 return res;
 260
 261         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 262                 return -EINVAL;
 263
 264         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 265         if (!res)
 266                 return -EINVAL;
 267         return res;
 268 }
 269
 270 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 271                                        struct netlink_callback *cb,
 272                                        struct cfg80211_registered_device **rdev,
 273                                        struct net_device **dev)
 274 {
 275         int ifidx = cb->args[0];
 276         int err;
 277
 278         if (!ifidx)
 279                 ifidx = nl80211_get_ifidx(cb);
 280         if (ifidx < 0)
 281                 return ifidx;
 282
 283         cb->args[0] = ifidx;
 284
 285         rtnl_lock();
 286
 287         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 288         if (!*dev) {
 289                 err = -ENODEV;
 290                 goto out_rtnl;
 291         }
 292
 293         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 294         if (IS_ERR(*rdev)) {
 295                 err = PTR_ERR(*rdev);
 296                 goto out_rtnl;
 297         }
 298
 299         return 0;
 300  out_rtnl:
 301         rtnl_unlock();
 302         return err;
 303 }
 304
 305 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 306 {
 307         cfg80211_unlock_rdev(rdev);
 308         rtnl_unlock();
 309 }
 310
 311 /* IE validation */
 312 static bool is_valid_ie_attr(const struct nlattr *attr)
 313 {
 314         const u8 *pos;
 315         int len;
 316
 317         if (!attr)
 318                 return true;
 319
 320         pos = nla_data(attr);
 321         len = nla_len(attr);
 322
 323         while (len) {
 324                 u8 elemlen;
 325
 326                 if (len < 2)
 327                         return false;
 328                 len -= 2;
 329
 330                 elemlen = pos[1];
 331                 if (elemlen > len)
 332                         return false;
 333
 334                 len -= elemlen;
 335                 pos += 2 + elemlen;
 336         }
 337
 338         return true;
 339 }
 340
 341 /* message building helper */
 342 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 343                                    int flags, u8 cmd)
 344 {
 345         /* since there is no private header just add the generic one */
 346         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 347 }
 348
 349 static int nl80211_msg_put_channel(struct sk_buff *msg,
 350                                    struct ieee80211_channel *chan)
 351 {
 352         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 353                     chan->center_freq);
 354
 355         if (chan->flags & IEEE80211_CHAN_DISABLED)
 356                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 357         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 358                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 359         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 360                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 361         if (chan->flags & IEEE80211_CHAN_RADAR)
 362                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 363
 364         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 365                     DBM_TO_MBM(chan->max_power));
 366
 367         return 0;
 368
 369  nla_put_failure:
 370         return -ENOBUFS;
 371 }
 372
 373 /* netlink command implementations */
 374
 375 struct key_parse {
 376         struct key_params p;
 377         int idx;
 378         int type;
 379         bool def, defmgmt;
 380         bool def_uni, def_multi;
 381 };
 382
 383 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 384 {
 385         struct nlattr *tb[NL80211_KEY_MAX + 1];
 386         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 387                                    nl80211_key_policy);
 388         if (err)
 389                 return err;
 390
 391         k->def = !!tb[NL80211_KEY_DEFAULT];
 392         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 393
 394         if (k->def) {
 395                 k->def_uni = true;
 396                 k->def_multi = true;
 397         }
 398         if (k->defmgmt)
 399                 k->def_multi = true;
 400
 401         if (tb[NL80211_KEY_IDX])
 402                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 403
 404         if (tb[NL80211_KEY_DATA]) {
 405                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 406                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 407         }
 408
 409         if (tb[NL80211_KEY_SEQ]) {
 410                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 411                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 412         }
 413
 414         if (tb[NL80211_KEY_CIPHER])
 415                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 416
 417         if (tb[NL80211_KEY_TYPE]) {
 418                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 419                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 420                         return -EINVAL;
 421         }
 422
 423         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 424                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 425                 int err = nla_parse_nested(kdt,
 426                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 427                                            tb[NL80211_KEY_DEFAULT_TYPES],
 428                                            nl80211_key_default_policy);
 429                 if (err)
 430                         return err;
 431
 432                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 433                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 440 {
 441         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 442                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 443                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 444         }
 445
 446         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 447                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 448                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 449         }
 450
 451         if (info->attrs[NL80211_ATTR_KEY_IDX])
 452                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 453
 454         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 455                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 456
 457         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 458         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 459
 460         if (k->def) {
 461                 k->def_uni = true;
 462                 k->def_multi = true;
 463         }
 464         if (k->defmgmt)
 465                 k->def_multi = true;
 466
 467         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 468                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 469                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 470                         return -EINVAL;
 471         }
 472
 473         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 474                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 475                 int err = nla_parse_nested(
 476                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 477                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 478                                 nl80211_key_default_policy);
 479                 if (err)
 480                         return err;
 481
 482                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 483                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 484         }
 485
 486         return 0;
 487 }
 488
 489 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 490 {
 491         int err;
 492
 493         memset(k, 0, sizeof(*k));
 494         k->idx = -1;
 495         k->type = -1;
 496
 497         if (info->attrs[NL80211_ATTR_KEY])
 498                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 499         else
 500                 err = nl80211_parse_key_old(info, k);
 501
 502         if (err)
 503                 return err;
 504
 505         if (k->def && k->defmgmt)
 506                 return -EINVAL;
 507
 508         if (k->defmgmt) {
 509                 if (k->def_uni || !k->def_multi)
 510                         return -EINVAL;
 511         }
 512
 513         if (k->idx != -1) {
 514                 if (k->defmgmt) {
 515                         if (k->idx < 4 || k->idx > 5)
 516                                 return -EINVAL;
 517                 } else if (k->def) {
 518                         if (k->idx < 0 || k->idx > 3)
 519                                 return -EINVAL;
 520                 } else {
 521                         if (k->idx < 0 || k->idx > 5)
 522                                 return -EINVAL;
 523                 }
 524         }
 525
 526         return 0;
 527 }
 528
 529 static struct cfg80211_cached_keys *
 530 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 531                        struct nlattr *keys)
 532 {
 533         struct key_parse parse;
 534         struct nlattr *key;
 535         struct cfg80211_cached_keys *result;
 536         int rem, err, def = 0;
 537
 538         result = kzalloc(sizeof(*result), GFP_KERNEL);
 539         if (!result)
 540                 return ERR_PTR(-ENOMEM);
 541
 542         result->def = -1;
 543         result->defmgmt = -1;
 544
 545         nla_for_each_nested(key, keys, rem) {
 546                 memset(&parse, 0, sizeof(parse));
 547                 parse.idx = -1;
 548
 549                 err = nl80211_parse_key_new(key, &parse);
 550                 if (err)
 551                         goto error;
 552                 err = -EINVAL;
 553                 if (!parse.p.key)
 554                         goto error;
 555                 if (parse.idx < 0 || parse.idx > 4)
 556                         goto error;
 557                 if (parse.def) {
 558                         if (def)
 559                                 goto error;
 560                         def = 1;
 561                         result->def = parse.idx;
 562                         if (!parse.def_uni || !parse.def_multi)
 563                                 goto error;
 564                 } else if (parse.defmgmt)
 565                         goto error;
 566                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 567                                                      parse.idx, false, NULL);
 568                 if (err)
 569                         goto error;
 570                 result->params[parse.idx].cipher = parse.p.cipher;
 571                 result->params[parse.idx].key_len = parse.p.key_len;
 572                 result->params[parse.idx].key = result->data[parse.idx];
 573                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 574         }
 575
 576         return result;
 577  error:
 578         kfree(result);
 579         return ERR_PTR(err);
 580 }
 581
 582 static int nl80211_key_allowed(struct wireless_dev *wdev)
 583 {
 584         ASSERT_WDEV_LOCK(wdev);
 585
 586         switch (wdev->iftype) {
 587         case NL80211_IFTYPE_AP:
 588         case NL80211_IFTYPE_AP_VLAN:
 589         case NL80211_IFTYPE_P2P_GO:
 590         case NL80211_IFTYPE_MESH_POINT:
 591                 break;
 592         case NL80211_IFTYPE_ADHOC:
 593                 if (!wdev->current_bss)
 594                         return -ENOLINK;
 595                 break;
 596         case NL80211_IFTYPE_STATION:
 597         case NL80211_IFTYPE_P2P_CLIENT:
 598                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 599                         return -ENOLINK;
 600                 break;
 601         default:
 602                 return -EINVAL;
 603         }
 604
 605         return 0;
 606 }
 607
 608 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 609 {
 610         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 611         int i;
 612
 613         if (!nl_modes)
 614                 goto nla_put_failure;
 615
 616         i = 0;
 617         while (ifmodes) {
 618                 if (ifmodes & 1)
 619                         NLA_PUT_FLAG(msg, i);
 620                 ifmodes >>= 1;
 621                 i++;
 622         }
 623
 624         nla_nest_end(msg, nl_modes);
 625         return 0;
 626
 627 nla_put_failure:
 628         return -ENOBUFS;
 629 }
 630
 631 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 632                                           struct sk_buff *msg)
 633 {
 634         struct nlattr *nl_combis;
 635         int i, j;
 636
 637         nl_combis = nla_nest_start(msg,
 638                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 639         if (!nl_combis)
 640                 goto nla_put_failure;
 641
 642         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 643                 const struct ieee80211_iface_combination *c;
 644                 struct nlattr *nl_combi, *nl_limits;
 645
 646                 c = &wiphy->iface_combinations[i];
 647
 648                 nl_combi = nla_nest_start(msg, i + 1);
 649                 if (!nl_combi)
 650                         goto nla_put_failure;
 651
 652                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 653                 if (!nl_limits)
 654                         goto nla_put_failure;
 655
 656                 for (j = 0; j < c->n_limits; j++) {
 657                         struct nlattr *nl_limit;
 658
 659                         nl_limit = nla_nest_start(msg, j + 1);
 660                         if (!nl_limit)
 661                                 goto nla_put_failure;
 662                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 663                                     c->limits[j].max);
 664                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 665                                                 c->limits[j].types))
 666                                 goto nla_put_failure;
 667                         nla_nest_end(msg, nl_limit);
 668                 }
 669
 670                 nla_nest_end(msg, nl_limits);
 671
 672                 if (c->beacon_int_infra_match)
 673                         NLA_PUT_FLAG(msg,
 674                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 675                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 676                             c->num_different_channels);
 677                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 678                             c->max_interfaces);
 679
 680                 nla_nest_end(msg, nl_combi);
 681         }
 682
 683         nla_nest_end(msg, nl_combis);
 684
 685         return 0;
 686 nla_put_failure:
 687         return -ENOBUFS;
 688 }
 689
 690 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 691                               struct cfg80211_registered_device *dev)
 692 {
 693         void *hdr;
 694         struct nlattr *nl_bands, *nl_band;
 695         struct nlattr *nl_freqs, *nl_freq;
 696         struct nlattr *nl_rates, *nl_rate;
 697         struct nlattr *nl_cmds;
 698         enum ieee80211_band band;
 699         struct ieee80211_channel *chan;
 700         struct ieee80211_rate *rate;
 701         int i;
 702         const struct ieee80211_txrx_stypes *mgmt_stypes =
 703                                 dev->wiphy.mgmt_stypes;
 704
 705         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 706         if (!hdr)
 707                 return -1;
 708
 709         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 710         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 711
 712         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 713                     cfg80211_rdev_list_generation);
 714
 715         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 716                    dev->wiphy.retry_short);
 717         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 718                    dev->wiphy.retry_long);
 719         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 720                     dev->wiphy.frag_threshold);
 721         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 722                     dev->wiphy.rts_threshold);
 723         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 724                     dev->wiphy.coverage_class);
 725         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 726                    dev->wiphy.max_scan_ssids);
 727         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 728                    dev->wiphy.max_sched_scan_ssids);
 729         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 730                     dev->wiphy.max_scan_ie_len);
 731         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 732                     dev->wiphy.max_sched_scan_ie_len);
 733         NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 734                    dev->wiphy.max_match_sets);
 735
 736         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 737                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 738         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 739                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 740         if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
 741                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
 742         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 743                 NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
 744         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
 745                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
 746         if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
 747                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
 748
 749         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 750                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 751                 dev->wiphy.cipher_suites);
 752
 753         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 754                    dev->wiphy.max_num_pmkids);
 755
 756         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 757                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 758
 759         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 760                     dev->wiphy.available_antennas_tx);
 761         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 762                     dev->wiphy.available_antennas_rx);
 763
 764         if (dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD)
 765                 NLA_PUT_U32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 766                             dev->wiphy.probe_resp_offload);
 767
 768         if ((dev->wiphy.available_antennas_tx ||
 769              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 770                 u32 tx_ant = 0, rx_ant = 0;
 771                 int res;
 772                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 773                 if (!res) {
 774                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 775                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 776                 }
 777         }
 778
 779         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 780                                 dev->wiphy.interface_modes))
 781                 goto nla_put_failure;
 782
 783         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 784         if (!nl_bands)
 785                 goto nla_put_failure;
 786
 787         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 788                 if (!dev->wiphy.bands[band])
 789                         continue;
 790
 791                 nl_band = nla_nest_start(msg, band);
 792                 if (!nl_band)
 793                         goto nla_put_failure;
 794
 795                 /* add HT info */
 796                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 797                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 798                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 799                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 800                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 801                                 dev->wiphy.bands[band]->ht_cap.cap);
 802                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 803                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 804                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 805                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 806                 }
 807
 808                 /* add frequencies */
 809                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 810                 if (!nl_freqs)
 811                         goto nla_put_failure;
 812
 813                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 814                         nl_freq = nla_nest_start(msg, i);
 815                         if (!nl_freq)
 816                                 goto nla_put_failure;
 817
 818                         chan = &dev->wiphy.bands[band]->channels[i];
 819
 820                         if (nl80211_msg_put_channel(msg, chan))
 821                                 goto nla_put_failure;
 822
 823                         nla_nest_end(msg, nl_freq);
 824                 }
 825
 826                 nla_nest_end(msg, nl_freqs);
 827
 828                 /* add bitrates */
 829                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 830                 if (!nl_rates)
 831                         goto nla_put_failure;
 832
 833                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 834                         nl_rate = nla_nest_start(msg, i);
 835                         if (!nl_rate)
 836                                 goto nla_put_failure;
 837
 838                         rate = &dev->wiphy.bands[band]->bitrates[i];
 839                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 840                                     rate->bitrate);
 841                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 842                                 NLA_PUT_FLAG(msg,
 843                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 844
 845                         nla_nest_end(msg, nl_rate);
 846                 }
 847
 848                 nla_nest_end(msg, nl_rates);
 849
 850                 nla_nest_end(msg, nl_band);
 851         }
 852         nla_nest_end(msg, nl_bands);
 853
 854         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 855         if (!nl_cmds)
 856                 goto nla_put_failure;
 857
 858         i = 0;
 859 #define CMD(op, n)                                              \
 860          do {                                                   \
 861                 if (dev->ops->op) {                             \
 862                         i++;                                    \
 863                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 864                 }                                               \
 865         } while (0)
 866
 867         CMD(add_virtual_intf, NEW_INTERFACE);
 868         CMD(change_virtual_intf, SET_INTERFACE);
 869         CMD(add_key, NEW_KEY);
 870         CMD(add_beacon, NEW_BEACON);
 871         CMD(add_station, NEW_STATION);
 872         CMD(add_mpath, NEW_MPATH);
 873         CMD(update_mesh_config, SET_MESH_CONFIG);
 874         CMD(change_bss, SET_BSS);
 875         CMD(auth, AUTHENTICATE);
 876         CMD(assoc, ASSOCIATE);
 877         CMD(deauth, DEAUTHENTICATE);
 878         CMD(disassoc, DISASSOCIATE);
 879         CMD(join_ibss, JOIN_IBSS);
 880         CMD(join_mesh, JOIN_MESH);
 881         CMD(set_pmksa, SET_PMKSA);
 882         CMD(del_pmksa, DEL_PMKSA);
 883         CMD(flush_pmksa, FLUSH_PMKSA);
 884         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 885         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 886         CMD(mgmt_tx, FRAME);
 887         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 888         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 889                 i++;
 890                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 891         }
 892         CMD(set_channel, SET_CHANNEL);
 893         CMD(set_wds_peer, SET_WDS_PEER);
 894         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 895                 CMD(tdls_mgmt, TDLS_MGMT);
 896                 CMD(tdls_oper, TDLS_OPER);
 897         }
 898         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 899                 CMD(sched_scan_start, START_SCHED_SCAN);
 900         CMD(probe_client, PROBE_CLIENT);
 901         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 902                 i++;
 903                 NLA_PUT_U32(msg, i, NL80211_CMD_REGISTER_BEACONS);
 904         }
 905
 906 #undef CMD
 907
 908         if (dev->ops->connect || dev->ops->auth) {
 909                 i++;
 910                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 911         }
 912
 913         if (dev->ops->disconnect || dev->ops->deauth) {
 914                 i++;
 915                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 916         }
 917
 918         nla_nest_end(msg, nl_cmds);
 919
 920         if (dev->ops->remain_on_channel)
 921                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 922                             dev->wiphy.max_remain_on_channel_duration);
 923
 924         if (dev->ops->mgmt_tx_cancel_wait)
 925                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 926
 927         if (mgmt_stypes) {
 928                 u16 stypes;
 929                 struct nlattr *nl_ftypes, *nl_ifs;
 930                 enum nl80211_iftype ift;
 931
 932                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 933                 if (!nl_ifs)
 934                         goto nla_put_failure;
 935
 936                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 937                         nl_ftypes = nla_nest_start(msg, ift);
 938                         if (!nl_ftypes)
 939                                 goto nla_put_failure;
 940                         i = 0;
 941                         stypes = mgmt_stypes[ift].tx;
 942                         while (stypes) {
 943                                 if (stypes & 1)
 944                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 945                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 946                                 stypes >>= 1;
 947                                 i++;
 948                         }
 949                         nla_nest_end(msg, nl_ftypes);
 950                 }
 951
 952                 nla_nest_end(msg, nl_ifs);
 953
 954                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 955                 if (!nl_ifs)
 956                         goto nla_put_failure;
 957
 958                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 959                         nl_ftypes = nla_nest_start(msg, ift);
 960                         if (!nl_ftypes)
 961                                 goto nla_put_failure;
 962                         i = 0;
 963                         stypes = mgmt_stypes[ift].rx;
 964                         while (stypes) {
 965                                 if (stypes & 1)
 966                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 967                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 968                                 stypes >>= 1;
 969                                 i++;
 970                         }
 971                         nla_nest_end(msg, nl_ftypes);
 972                 }
 973                 nla_nest_end(msg, nl_ifs);
 974         }
 975
 976         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 977                 struct nlattr *nl_wowlan;
 978
 979                 nl_wowlan = nla_nest_start(msg,
 980                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 981                 if (!nl_wowlan)
 982                         goto nla_put_failure;
 983
 984                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 985                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 986                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
 987                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 988                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
 989                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
 990                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
 991                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
 992                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
 993                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
 994                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
 995                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
 996                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
 997                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
 998                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
 999                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
1000                 if (dev->wiphy.wowlan.n_patterns) {
1001                         struct nl80211_wowlan_pattern_support pat = {
1002                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1003                                 .min_pattern_len =
1004                                         dev->wiphy.wowlan.pattern_min_len,
1005                                 .max_pattern_len =
1006                                         dev->wiphy.wowlan.pattern_max_len,
1007                         };
1008                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1009                                 sizeof(pat), &pat);
1010                 }
1011
1012                 nla_nest_end(msg, nl_wowlan);
1013         }
1014
1015         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1016                                 dev->wiphy.software_iftypes))
1017                 goto nla_put_failure;
1018
1019         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1020                 goto nla_put_failure;
1021
1022         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME)
1023                 NLA_PUT_U32(msg, NL80211_ATTR_DEVICE_AP_SME,
1024                             dev->wiphy.ap_sme_capa);
1025
1026         NLA_PUT_U32(msg, NL80211_ATTR_FEATURE_FLAGS, dev->wiphy.features);
1027
1028         return genlmsg_end(msg, hdr);
1029
1030  nla_put_failure:
1031         genlmsg_cancel(msg, hdr);
1032         return -EMSGSIZE;
1033 }
1034
1035 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1036 {
1037         int idx = 0;
1038         int start = cb->args[0];
1039         struct cfg80211_registered_device *dev;
1040
1041         mutex_lock(&cfg80211_mutex);
1042         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1043                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1044                         continue;
1045                 if (++idx <= start)
1046                         continue;
1047                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1048                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1049                                        dev) < 0) {
1050                         idx--;
1051                         break;
1052                 }
1053         }
1054         mutex_unlock(&cfg80211_mutex);
1055
1056         cb->args[0] = idx;
1057
1058         return skb->len;
1059 }
1060
1061 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1062 {
1063         struct sk_buff *msg;
1064         struct cfg80211_registered_device *dev = info->user_ptr[0];
1065
1066         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1067         if (!msg)
1068                 return -ENOMEM;
1069
1070         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1071                 nlmsg_free(msg);
1072                 return -ENOBUFS;
1073         }
1074
1075         return genlmsg_reply(msg, info);
1076 }
1077
1078 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1079         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1080         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1081         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1082         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1083         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1084 };
1085
1086 static int parse_txq_params(struct nlattr *tb[],
1087                             struct ieee80211_txq_params *txq_params)
1088 {
1089         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1090             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1091             !tb[NL80211_TXQ_ATTR_AIFS])
1092                 return -EINVAL;
1093
1094         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1095         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1096         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1097         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1098         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1099
1100         return 0;
1101 }
1102
1103 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1104 {
1105         /*
1106          * You can only set the channel explicitly for AP, mesh
1107          * and WDS type interfaces; all others have their channel
1108          * managed via their respective "establish a connection"
1109          * command (connect, join, ...)
1110          *
1111          * Monitors are special as they are normally slaved to
1112          * whatever else is going on, so they behave as though
1113          * you tried setting the wiphy channel itself.
1114          */
1115         return !wdev ||
1116                 wdev->iftype == NL80211_IFTYPE_AP ||
1117                 wdev->iftype == NL80211_IFTYPE_WDS ||
1118                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1119                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1120                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1121 }
1122
1123 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1124                                  struct wireless_dev *wdev,
1125                                  struct genl_info *info)
1126 {
1127         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1128         u32 freq;
1129         int result;
1130
1131         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1132                 return -EINVAL;
1133
1134         if (!nl80211_can_set_dev_channel(wdev))
1135                 return -EOPNOTSUPP;
1136
1137         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1138                 channel_type = nla_get_u32(info->attrs[
1139                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1140                 if (channel_type != NL80211_CHAN_NO_HT &&
1141                     channel_type != NL80211_CHAN_HT20 &&
1142                     channel_type != NL80211_CHAN_HT40PLUS &&
1143                     channel_type != NL80211_CHAN_HT40MINUS)
1144                         return -EINVAL;
1145         }
1146
1147         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1148
1149         mutex_lock(&rdev->devlist_mtx);
1150         if (wdev) {
1151                 wdev_lock(wdev);
1152                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1153                 wdev_unlock(wdev);
1154         } else {
1155                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1156         }
1157         mutex_unlock(&rdev->devlist_mtx);
1158
1159         return result;
1160 }
1161
1162 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1163 {
1164         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1165         struct net_device *netdev = info->user_ptr[1];
1166
1167         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1168 }
1169
1170 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1171 {
1172         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1173         struct net_device *dev = info->user_ptr[1];
1174         struct wireless_dev *wdev = dev->ieee80211_ptr;
1175         const u8 *bssid;
1176
1177         if (!info->attrs[NL80211_ATTR_MAC])
1178                 return -EINVAL;
1179
1180         if (netif_running(dev))
1181                 return -EBUSY;
1182
1183         if (!rdev->ops->set_wds_peer)
1184                 return -EOPNOTSUPP;
1185
1186         if (wdev->iftype != NL80211_IFTYPE_WDS)
1187                 return -EOPNOTSUPP;
1188
1189         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1190         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1191 }
1192
1193
1194 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1195 {
1196         struct cfg80211_registered_device *rdev;
1197         struct net_device *netdev = NULL;
1198         struct wireless_dev *wdev;
1199         int result = 0, rem_txq_params = 0;
1200         struct nlattr *nl_txq_params;
1201         u32 changed;
1202         u8 retry_short = 0, retry_long = 0;
1203         u32 frag_threshold = 0, rts_threshold = 0;
1204         u8 coverage_class = 0;
1205
1206         /*
1207          * Try to find the wiphy and netdev. Normally this
1208          * function shouldn't need the netdev, but this is
1209          * done for backward compatibility -- previously
1210          * setting the channel was done per wiphy, but now
1211          * it is per netdev. Previous userland like hostapd
1212          * also passed a netdev to set_wiphy, so that it is
1213          * possible to let that go to the right netdev!
1214          */
1215         mutex_lock(&cfg80211_mutex);
1216
1217         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1218                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1219
1220                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1221                 if (netdev && netdev->ieee80211_ptr) {
1222                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1223                         mutex_lock(&rdev->mtx);
1224                 } else
1225                         netdev = NULL;
1226         }
1227
1228         if (!netdev) {
1229                 rdev = __cfg80211_rdev_from_info(info);
1230                 if (IS_ERR(rdev)) {
1231                         mutex_unlock(&cfg80211_mutex);
1232                         return PTR_ERR(rdev);
1233                 }
1234                 wdev = NULL;
1235                 netdev = NULL;
1236                 result = 0;
1237
1238                 mutex_lock(&rdev->mtx);
1239         } else if (netif_running(netdev) &&
1240                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1241                 wdev = netdev->ieee80211_ptr;
1242         else
1243                 wdev = NULL;
1244
1245         /*
1246          * end workaround code, by now the rdev is available
1247          * and locked, and wdev may or may not be NULL.
1248          */
1249
1250         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1251                 result = cfg80211_dev_rename(
1252                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1253
1254         mutex_unlock(&cfg80211_mutex);
1255
1256         if (result)
1257                 goto bad_res;
1258
1259         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1260                 struct ieee80211_txq_params txq_params;
1261                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1262
1263                 if (!rdev->ops->set_txq_params) {
1264                         result = -EOPNOTSUPP;
1265                         goto bad_res;
1266                 }
1267
1268                 if (!netdev) {
1269                         result = -EINVAL;
1270                         goto bad_res;
1271                 }
1272
1273                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1274                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1275                         result = -EINVAL;
1276                         goto bad_res;
1277                 }
1278
1279                 nla_for_each_nested(nl_txq_params,
1280                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1281                                     rem_txq_params) {
1282                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1283                                   nla_data(nl_txq_params),
1284                                   nla_len(nl_txq_params),
1285                                   txq_params_policy);
1286                         result = parse_txq_params(tb, &txq_params);
1287                         if (result)
1288                                 goto bad_res;
1289
1290                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1291                                                            netdev,
1292                                                            &txq_params);
1293                         if (result)
1294                                 goto bad_res;
1295                 }
1296         }
1297
1298         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1299                 result = __nl80211_set_channel(rdev, wdev, info);
1300                 if (result)
1301                         goto bad_res;
1302         }
1303
1304         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1305                 enum nl80211_tx_power_setting type;
1306                 int idx, mbm = 0;
1307
1308                 if (!rdev->ops->set_tx_power) {
1309                         result = -EOPNOTSUPP;
1310                         goto bad_res;
1311                 }
1312
1313                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1314                 type = nla_get_u32(info->attrs[idx]);
1315
1316                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1317                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1318                         result = -EINVAL;
1319                         goto bad_res;
1320                 }
1321
1322                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1323                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1324                         mbm = nla_get_u32(info->attrs[idx]);
1325                 }
1326
1327                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1328                 if (result)
1329                         goto bad_res;
1330         }
1331
1332         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1333             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1334                 u32 tx_ant, rx_ant;
1335                 if ((!rdev->wiphy.available_antennas_tx &&
1336                      !rdev->wiphy.available_antennas_rx) ||
1337                     !rdev->ops->set_antenna) {
1338                         result = -EOPNOTSUPP;
1339                         goto bad_res;
1340                 }
1341
1342                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1343                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1344
1345                 /* reject antenna configurations which don't match the
1346                  * available antenna masks, except for the "all" mask */
1347                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1348                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1349                         result = -EINVAL;
1350                         goto bad_res;
1351                 }
1352
1353                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1354                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1355
1356                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1357                 if (result)
1358                         goto bad_res;
1359         }
1360
1361         changed = 0;
1362
1363         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1364                 retry_short = nla_get_u8(
1365                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1366                 if (retry_short == 0) {
1367                         result = -EINVAL;
1368                         goto bad_res;
1369                 }
1370                 changed |= WIPHY_PARAM_RETRY_SHORT;
1371         }
1372
1373         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1374                 retry_long = nla_get_u8(
1375                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1376                 if (retry_long == 0) {
1377                         result = -EINVAL;
1378                         goto bad_res;
1379                 }
1380                 changed |= WIPHY_PARAM_RETRY_LONG;
1381         }
1382
1383         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1384                 frag_threshold = nla_get_u32(
1385                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1386                 if (frag_threshold < 256) {
1387                         result = -EINVAL;
1388                         goto bad_res;
1389                 }
1390                 if (frag_threshold != (u32) -1) {
1391                         /*
1392                          * Fragments (apart from the last one) are required to
1393                          * have even length. Make the fragmentation code
1394                          * simpler by stripping LSB should someone try to use
1395                          * odd threshold value.
1396                          */
1397                         frag_threshold &= ~0x1;
1398                 }
1399                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1400         }
1401
1402         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1403                 rts_threshold = nla_get_u32(
1404                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1405                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1406         }
1407
1408         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1409                 coverage_class = nla_get_u8(
1410                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1411                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1412         }
1413
1414         if (changed) {
1415                 u8 old_retry_short, old_retry_long;
1416                 u32 old_frag_threshold, old_rts_threshold;
1417                 u8 old_coverage_class;
1418
1419                 if (!rdev->ops->set_wiphy_params) {
1420                         result = -EOPNOTSUPP;
1421                         goto bad_res;
1422                 }
1423
1424                 old_retry_short = rdev->wiphy.retry_short;
1425                 old_retry_long = rdev->wiphy.retry_long;
1426                 old_frag_threshold = rdev->wiphy.frag_threshold;
1427                 old_rts_threshold = rdev->wiphy.rts_threshold;
1428                 old_coverage_class = rdev->wiphy.coverage_class;
1429
1430                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1431                         rdev->wiphy.retry_short = retry_short;
1432                 if (changed & WIPHY_PARAM_RETRY_LONG)
1433                         rdev->wiphy.retry_long = retry_long;
1434                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1435                         rdev->wiphy.frag_threshold = frag_threshold;
1436                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1437                         rdev->wiphy.rts_threshold = rts_threshold;
1438                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1439                         rdev->wiphy.coverage_class = coverage_class;
1440
1441                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1442                 if (result) {
1443                         rdev->wiphy.retry_short = old_retry_short;
1444                         rdev->wiphy.retry_long = old_retry_long;
1445                         rdev->wiphy.frag_threshold = old_frag_threshold;
1446                         rdev->wiphy.rts_threshold = old_rts_threshold;
1447                         rdev->wiphy.coverage_class = old_coverage_class;
1448                 }
1449         }
1450
1451  bad_res:
1452         mutex_unlock(&rdev->mtx);
1453         if (netdev)
1454                 dev_put(netdev);
1455         return result;
1456 }
1457
1458
1459 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1460                               struct cfg80211_registered_device *rdev,
1461                               struct net_device *dev)
1462 {
1463         void *hdr;
1464
1465         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1466         if (!hdr)
1467                 return -1;
1468
1469         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1470         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1471         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1472         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1473
1474         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1475                     rdev->devlist_generation ^
1476                         (cfg80211_rdev_list_generation << 2));
1477
1478         return genlmsg_end(msg, hdr);
1479
1480  nla_put_failure:
1481         genlmsg_cancel(msg, hdr);
1482         return -EMSGSIZE;
1483 }
1484
1485 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1486 {
1487         int wp_idx = 0;
1488         int if_idx = 0;
1489         int wp_start = cb->args[0];
1490         int if_start = cb->args[1];
1491         struct cfg80211_registered_device *rdev;
1492         struct wireless_dev *wdev;
1493
1494         mutex_lock(&cfg80211_mutex);
1495         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1496                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1497                         continue;
1498                 if (wp_idx < wp_start) {
1499                         wp_idx++;
1500                         continue;
1501                 }
1502                 if_idx = 0;
1503
1504                 mutex_lock(&rdev->devlist_mtx);
1505                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1506                         if (if_idx < if_start) {
1507                                 if_idx++;
1508                                 continue;
1509                         }
1510                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1511                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1512                                                rdev, wdev->netdev) < 0) {
1513                                 mutex_unlock(&rdev->devlist_mtx);
1514                                 goto out;
1515                         }
1516                         if_idx++;
1517                 }
1518                 mutex_unlock(&rdev->devlist_mtx);
1519
1520                 wp_idx++;
1521         }
1522  out:
1523         mutex_unlock(&cfg80211_mutex);
1524
1525         cb->args[0] = wp_idx;
1526         cb->args[1] = if_idx;
1527
1528         return skb->len;
1529 }
1530
1531 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1532 {
1533         struct sk_buff *msg;
1534         struct cfg80211_registered_device *dev = info->user_ptr[0];
1535         struct net_device *netdev = info->user_ptr[1];
1536
1537         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1538         if (!msg)
1539                 return -ENOMEM;
1540
1541         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1542                                dev, netdev) < 0) {
1543                 nlmsg_free(msg);
1544                 return -ENOBUFS;
1545         }
1546
1547         return genlmsg_reply(msg, info);
1548 }
1549
1550 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1551         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1552         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1553         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1554         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1555         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1556 };
1557
1558 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1559 {
1560         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1561         int flag;
1562
1563         *mntrflags = 0;
1564
1565         if (!nla)
1566                 return -EINVAL;
1567
1568         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1569                              nla, mntr_flags_policy))
1570                 return -EINVAL;
1571
1572         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1573                 if (flags[flag])
1574                         *mntrflags |= (1<<flag);
1575
1576         return 0;
1577 }
1578
1579 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1580                                struct net_device *netdev, u8 use_4addr,
1581                                enum nl80211_iftype iftype)
1582 {
1583         if (!use_4addr) {
1584                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1585                         return -EBUSY;
1586                 return 0;
1587         }
1588
1589         switch (iftype) {
1590         case NL80211_IFTYPE_AP_VLAN:
1591                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1592                         return 0;
1593                 break;
1594         case NL80211_IFTYPE_STATION:
1595                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1596                         return 0;
1597                 break;
1598         default:
1599                 break;
1600         }
1601
1602         return -EOPNOTSUPP;
1603 }
1604
1605 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1606 {
1607         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1608         struct vif_params params;
1609         int err;
1610         enum nl80211_iftype otype, ntype;
1611         struct net_device *dev = info->user_ptr[1];
1612         u32 _flags, *flags = NULL;
1613         bool change = false;
1614
1615         memset(&params, 0, sizeof(params));
1616
1617         otype = ntype = dev->ieee80211_ptr->iftype;
1618
1619         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1620                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1621                 if (otype != ntype)
1622                         change = true;
1623                 if (ntype > NL80211_IFTYPE_MAX)
1624                         return -EINVAL;
1625         }
1626
1627         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1628                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1629
1630                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1631                         return -EINVAL;
1632                 if (netif_running(dev))
1633                         return -EBUSY;
1634
1635                 wdev_lock(wdev);
1636                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1637                              IEEE80211_MAX_MESH_ID_LEN);
1638                 wdev->mesh_id_up_len =
1639                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1640                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1641                        wdev->mesh_id_up_len);
1642                 wdev_unlock(wdev);
1643         }
1644
1645         if (info->attrs[NL80211_ATTR_4ADDR]) {
1646                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1647                 change = true;
1648                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1649                 if (err)
1650                         return err;
1651         } else {
1652                 params.use_4addr = -1;
1653         }
1654
1655         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1656                 if (ntype != NL80211_IFTYPE_MONITOR)
1657                         return -EINVAL;
1658                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1659                                           &_flags);
1660                 if (err)
1661                         return err;
1662
1663                 flags = &_flags;
1664                 change = true;
1665         }
1666
1667         if (change)
1668                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1669         else
1670                 err = 0;
1671
1672         if (!err && params.use_4addr != -1)
1673                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1674
1675         return err;
1676 }
1677
1678 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1679 {
1680         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1681         struct vif_params params;
1682         struct net_device *dev;
1683         int err;
1684         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1685         u32 flags;
1686
1687         memset(&params, 0, sizeof(params));
1688
1689         if (!info->attrs[NL80211_ATTR_IFNAME])
1690                 return -EINVAL;
1691
1692         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1693                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1694                 if (type > NL80211_IFTYPE_MAX)
1695                         return -EINVAL;
1696         }
1697
1698         if (!rdev->ops->add_virtual_intf ||
1699             !(rdev->wiphy.interface_modes & (1 << type)))
1700                 return -EOPNOTSUPP;
1701
1702         if (info->attrs[NL80211_ATTR_4ADDR]) {
1703                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1704                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1705                 if (err)
1706                         return err;
1707         }
1708
1709         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1710                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1711                                   &flags);
1712         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1713                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1714                 type, err ? NULL : &flags, &params);
1715         if (IS_ERR(dev))
1716                 return PTR_ERR(dev);
1717
1718         if (type == NL80211_IFTYPE_MESH_POINT &&
1719             info->attrs[NL80211_ATTR_MESH_ID]) {
1720                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1721
1722                 wdev_lock(wdev);
1723                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1724                              IEEE80211_MAX_MESH_ID_LEN);
1725                 wdev->mesh_id_up_len =
1726                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1727                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1728                        wdev->mesh_id_up_len);
1729                 wdev_unlock(wdev);
1730         }
1731
1732         return 0;
1733 }
1734
1735 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1736 {
1737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1738         struct net_device *dev = info->user_ptr[1];
1739
1740         if (!rdev->ops->del_virtual_intf)
1741                 return -EOPNOTSUPP;
1742
1743         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1744 }
1745
1746 struct get_key_cookie {
1747         struct sk_buff *msg;
1748         int error;
1749         int idx;
1750 };
1751
1752 static void get_key_callback(void *c, struct key_params *params)
1753 {
1754         struct nlattr *key;
1755         struct get_key_cookie *cookie = c;
1756
1757         if (params->key)
1758                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1759                         params->key_len, params->key);
1760
1761         if (params->seq)
1762                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1763                         params->seq_len, params->seq);
1764
1765         if (params->cipher)
1766                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1767                             params->cipher);
1768
1769         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1770         if (!key)
1771                 goto nla_put_failure;
1772
1773         if (params->key)
1774                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1775                         params->key_len, params->key);
1776
1777         if (params->seq)
1778                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1779                         params->seq_len, params->seq);
1780
1781         if (params->cipher)
1782                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1783                             params->cipher);
1784
1785         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1786
1787         nla_nest_end(cookie->msg, key);
1788
1789         return;
1790  nla_put_failure:
1791         cookie->error = 1;
1792 }
1793
1794 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1795 {
1796         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1797         int err;
1798         struct net_device *dev = info->user_ptr[1];
1799         u8 key_idx = 0;
1800         const u8 *mac_addr = NULL;
1801         bool pairwise;
1802         struct get_key_cookie cookie = {
1803                 .error = 0,
1804         };
1805         void *hdr;
1806         struct sk_buff *msg;
1807
1808         if (info->attrs[NL80211_ATTR_KEY_IDX])
1809                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1810
1811         if (key_idx > 5)
1812                 return -EINVAL;
1813
1814         if (info->attrs[NL80211_ATTR_MAC])
1815                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1816
1817         pairwise = !!mac_addr;
1818         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1819                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1820                 if (kt >= NUM_NL80211_KEYTYPES)
1821                         return -EINVAL;
1822                 if (kt != NL80211_KEYTYPE_GROUP &&
1823                     kt != NL80211_KEYTYPE_PAIRWISE)
1824                         return -EINVAL;
1825                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1826         }
1827
1828         if (!rdev->ops->get_key)
1829                 return -EOPNOTSUPP;
1830
1831         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1832         if (!msg)
1833                 return -ENOMEM;
1834
1835         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1836                              NL80211_CMD_NEW_KEY);
1837         if (IS_ERR(hdr))
1838                 return PTR_ERR(hdr);
1839
1840         cookie.msg = msg;
1841         cookie.idx = key_idx;
1842
1843         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1844         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1845         if (mac_addr)
1846                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1847
1848         if (pairwise && mac_addr &&
1849             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1850                 return -ENOENT;
1851
1852         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1853                                  mac_addr, &cookie, get_key_callback);
1854
1855         if (err)
1856                 goto free_msg;
1857
1858         if (cookie.error)
1859                 goto nla_put_failure;
1860
1861         genlmsg_end(msg, hdr);
1862         return genlmsg_reply(msg, info);
1863
1864  nla_put_failure:
1865         err = -ENOBUFS;
1866  free_msg:
1867         nlmsg_free(msg);
1868         return err;
1869 }
1870
1871 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1872 {
1873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1874         struct key_parse key;
1875         int err;
1876         struct net_device *dev = info->user_ptr[1];
1877
1878         err = nl80211_parse_key(info, &key);
1879         if (err)
1880                 return err;
1881
1882         if (key.idx < 0)
1883                 return -EINVAL;
1884
1885         /* only support setting default key */
1886         if (!key.def && !key.defmgmt)
1887                 return -EINVAL;
1888
1889         wdev_lock(dev->ieee80211_ptr);
1890
1891         if (key.def) {
1892                 if (!rdev->ops->set_default_key) {
1893                         err = -EOPNOTSUPP;
1894                         goto out;
1895                 }
1896
1897                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1898                 if (err)
1899                         goto out;
1900
1901                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1902                                                  key.def_uni, key.def_multi);
1903
1904                 if (err)
1905                         goto out;
1906
1907 #ifdef CONFIG_CFG80211_WEXT
1908                 dev->ieee80211_ptr->wext.default_key = key.idx;
1909 #endif
1910         } else {
1911                 if (key.def_uni || !key.def_multi) {
1912                         err = -EINVAL;
1913                         goto out;
1914                 }
1915
1916                 if (!rdev->ops->set_default_mgmt_key) {
1917                         err = -EOPNOTSUPP;
1918                         goto out;
1919                 }
1920
1921                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1922                 if (err)
1923                         goto out;
1924
1925                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1926                                                       dev, key.idx);
1927                 if (err)
1928                         goto out;
1929
1930 #ifdef CONFIG_CFG80211_WEXT
1931                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1932 #endif
1933         }
1934
1935  out:
1936         wdev_unlock(dev->ieee80211_ptr);
1937
1938         return err;
1939 }
1940
1941 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1942 {
1943         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1944         int err;
1945         struct net_device *dev = info->user_ptr[1];
1946         struct key_parse key;
1947         const u8 *mac_addr = NULL;
1948
1949         err = nl80211_parse_key(info, &key);
1950         if (err)
1951                 return err;
1952
1953         if (!key.p.key)
1954                 return -EINVAL;
1955
1956         if (info->attrs[NL80211_ATTR_MAC])
1957                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1958
1959         if (key.type == -1) {
1960                 if (mac_addr)
1961                         key.type = NL80211_KEYTYPE_PAIRWISE;
1962                 else
1963                         key.type = NL80211_KEYTYPE_GROUP;
1964         }
1965
1966         /* for now */
1967         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1968             key.type != NL80211_KEYTYPE_GROUP)
1969                 return -EINVAL;
1970
1971         if (!rdev->ops->add_key)
1972                 return -EOPNOTSUPP;
1973
1974         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1975                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1976                                            mac_addr))
1977                 return -EINVAL;
1978
1979         wdev_lock(dev->ieee80211_ptr);
1980         err = nl80211_key_allowed(dev->ieee80211_ptr);
1981         if (!err)
1982                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1983                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1984                                          mac_addr, &key.p);
1985         wdev_unlock(dev->ieee80211_ptr);
1986
1987         return err;
1988 }
1989
1990 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1991 {
1992         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1993         int err;
1994         struct net_device *dev = info->user_ptr[1];
1995         u8 *mac_addr = NULL;
1996         struct key_parse key;
1997
1998         err = nl80211_parse_key(info, &key);
1999         if (err)
2000                 return err;
2001
2002         if (info->attrs[NL80211_ATTR_MAC])
2003                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2004
2005         if (key.type == -1) {
2006                 if (mac_addr)
2007                         key.type = NL80211_KEYTYPE_PAIRWISE;
2008                 else
2009                         key.type = NL80211_KEYTYPE_GROUP;
2010         }
2011
2012         /* for now */
2013         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2014             key.type != NL80211_KEYTYPE_GROUP)
2015                 return -EINVAL;
2016
2017         if (!rdev->ops->del_key)
2018                 return -EOPNOTSUPP;
2019
2020         wdev_lock(dev->ieee80211_ptr);
2021         err = nl80211_key_allowed(dev->ieee80211_ptr);
2022
2023         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2024             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2025                 err = -ENOENT;
2026
2027         if (!err)
2028                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2029                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2030                                          mac_addr);
2031
2032 #ifdef CONFIG_CFG80211_WEXT
2033         if (!err) {
2034                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2035                         dev->ieee80211_ptr->wext.default_key = -1;
2036                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2037                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2038         }
2039 #endif
2040         wdev_unlock(dev->ieee80211_ptr);
2041
2042         return err;
2043 }
2044
2045 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
2046 {
2047         int (*call)(struct wiphy *wiphy, struct net_device *dev,
2048                     struct beacon_parameters *info);
2049         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2050         struct net_device *dev = info->user_ptr[1];
2051         struct wireless_dev *wdev = dev->ieee80211_ptr;
2052         struct beacon_parameters params;
2053         int haveinfo = 0, err;
2054
2055         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2056             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2057             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2058             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2059                 return -EINVAL;
2060
2061         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2062             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2063                 return -EOPNOTSUPP;
2064
2065         memset(&params, 0, sizeof(params));
2066
2067         switch (info->genlhdr->cmd) {
2068         case NL80211_CMD_NEW_BEACON:
2069                 /* these are required for NEW_BEACON */
2070                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2071                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2072                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
2073                         return -EINVAL;
2074
2075                 params.interval =
2076                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2077                 params.dtim_period =
2078                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2079
2080                 err = cfg80211_validate_beacon_int(rdev, params.interval);
2081                 if (err)
2082                         return err;
2083
2084                 /*
2085                  * In theory, some of these attributes could be required for
2086                  * NEW_BEACON, but since they were not used when the command was
2087                  * originally added, keep them optional for old user space
2088                  * programs to work with drivers that do not need the additional
2089                  * information.
2090                  */
2091                 if (info->attrs[NL80211_ATTR_SSID]) {
2092                         params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2093                         params.ssid_len =
2094                                 nla_len(info->attrs[NL80211_ATTR_SSID]);
2095                         if (params.ssid_len == 0 ||
2096                             params.ssid_len > IEEE80211_MAX_SSID_LEN)
2097                                 return -EINVAL;
2098                 }
2099
2100                 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2101                         params.hidden_ssid = nla_get_u32(
2102                                 info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2103                         if (params.hidden_ssid !=
2104                             NL80211_HIDDEN_SSID_NOT_IN_USE &&
2105                             params.hidden_ssid !=
2106                             NL80211_HIDDEN_SSID_ZERO_LEN &&
2107                             params.hidden_ssid !=
2108                             NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2109                                 return -EINVAL;
2110                 }
2111
2112                 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2113
2114                 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2115                         params.auth_type = nla_get_u32(
2116                                 info->attrs[NL80211_ATTR_AUTH_TYPE]);
2117                         if (!nl80211_valid_auth_type(params.auth_type))
2118                                 return -EINVAL;
2119                 } else
2120                         params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2121
2122                 err = nl80211_crypto_settings(rdev, info, &params.crypto,
2123                                               NL80211_MAX_NR_CIPHER_SUITES);
2124                 if (err)
2125                         return err;
2126
2127                 call = rdev->ops->add_beacon;
2128                 break;
2129         case NL80211_CMD_SET_BEACON:
2130                 call = rdev->ops->set_beacon;
2131                 break;
2132         default:
2133                 WARN_ON(1);
2134                 return -EOPNOTSUPP;
2135         }
2136
2137         if (!call)
2138                 return -EOPNOTSUPP;
2139
2140         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2141                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2142                 params.head_len =
2143                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2144                 haveinfo = 1;
2145         }
2146
2147         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2148                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2149                 params.tail_len =
2150                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2151                 haveinfo = 1;
2152         }
2153
2154         if (!haveinfo)
2155                 return -EINVAL;
2156
2157         if (info->attrs[NL80211_ATTR_IE]) {
2158                 params.beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2159                 params.beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2160         }
2161
2162         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2163                 params.proberesp_ies =
2164                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2165                 params.proberesp_ies_len =
2166                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2167         }
2168
2169         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2170                 params.assocresp_ies =
2171                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2172                 params.assocresp_ies_len =
2173                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2174         }
2175
2176         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2177                 params.probe_resp =
2178                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2179                 params.probe_resp_len =
2180                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2181         }
2182
2183         err = call(&rdev->wiphy, dev, &params);
2184         if (!err && params.interval)
2185                 wdev->beacon_interval = params.interval;
2186         return err;
2187 }
2188
2189 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
2190 {
2191         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2192         struct net_device *dev = info->user_ptr[1];
2193         struct wireless_dev *wdev = dev->ieee80211_ptr;
2194         int err;
2195
2196         if (!rdev->ops->del_beacon)
2197                 return -EOPNOTSUPP;
2198
2199         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2200             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2201                 return -EOPNOTSUPP;
2202
2203         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
2204         if (!err)
2205                 wdev->beacon_interval = 0;
2206         return err;
2207 }
2208
2209 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2210         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2211         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2212         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2213         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2214         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2215 };
2216
2217 static int parse_station_flags(struct genl_info *info,
2218                                struct station_parameters *params)
2219 {
2220         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2221         struct nlattr *nla;
2222         int flag;
2223
2224         /*
2225          * Try parsing the new attribute first so userspace
2226          * can specify both for older kernels.
2227          */
2228         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2229         if (nla) {
2230                 struct nl80211_sta_flag_update *sta_flags;
2231
2232                 sta_flags = nla_data(nla);
2233                 params->sta_flags_mask = sta_flags->mask;
2234                 params->sta_flags_set = sta_flags->set;
2235                 if ((params->sta_flags_mask |
2236                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2237                         return -EINVAL;
2238                 return 0;
2239         }
2240
2241         /* if present, parse the old attribute */
2242
2243         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2244         if (!nla)
2245                 return 0;
2246
2247         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2248                              nla, sta_flags_policy))
2249                 return -EINVAL;
2250
2251         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
2252         params->sta_flags_mask &= ~1;
2253
2254         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2255                 if (flags[flag])
2256                         params->sta_flags_set |= (1<<flag);
2257
2258         return 0;
2259 }
2260
2261 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2262                                  int attr)
2263 {
2264         struct nlattr *rate;
2265         u16 bitrate;
2266
2267         rate = nla_nest_start(msg, attr);
2268         if (!rate)
2269                 goto nla_put_failure;
2270
2271         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2272         bitrate = cfg80211_calculate_bitrate(info);
2273         if (bitrate > 0)
2274                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2275
2276         if (info->flags & RATE_INFO_FLAGS_MCS)
2277                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2278         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2279                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2280         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2281                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2282
2283         nla_nest_end(msg, rate);
2284         return true;
2285
2286 nla_put_failure:
2287         return false;
2288 }
2289
2290 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2291                                 int flags, struct net_device *dev,
2292                                 const u8 *mac_addr, struct station_info *sinfo)
2293 {
2294         void *hdr;
2295         struct nlattr *sinfoattr, *bss_param;
2296
2297         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2298         if (!hdr)
2299                 return -1;
2300
2301         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2302         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2303
2304         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2305
2306         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2307         if (!sinfoattr)
2308                 goto nla_put_failure;
2309         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2310                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2311                             sinfo->connected_time);
2312         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2313                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2314                             sinfo->inactive_time);
2315         if (sinfo->filled & STATION_INFO_RX_BYTES)
2316                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2317                             sinfo->rx_bytes);
2318         if (sinfo->filled & STATION_INFO_TX_BYTES)
2319                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2320                             sinfo->tx_bytes);
2321         if (sinfo->filled & STATION_INFO_LLID)
2322                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2323                             sinfo->llid);
2324         if (sinfo->filled & STATION_INFO_PLID)
2325                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2326                             sinfo->plid);
2327         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2328                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2329                             sinfo->plink_state);
2330         if (sinfo->filled & STATION_INFO_SIGNAL)
2331                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2332                            sinfo->signal);
2333         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2334                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2335                            sinfo->signal_avg);
2336         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2337                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2338                                           NL80211_STA_INFO_TX_BITRATE))
2339                         goto nla_put_failure;
2340         }
2341         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2342                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2343                                           NL80211_STA_INFO_RX_BITRATE))
2344                         goto nla_put_failure;
2345         }
2346         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2347                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2348                             sinfo->rx_packets);
2349         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2350                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2351                             sinfo->tx_packets);
2352         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2353                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2354                             sinfo->tx_retries);
2355         if (sinfo->filled & STATION_INFO_TX_FAILED)
2356                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2357                             sinfo->tx_failed);
2358         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2359                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2360                 if (!bss_param)
2361                         goto nla_put_failure;
2362
2363                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2364                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2365                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2366                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2367                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2368                         NLA_PUT_FLAG(msg,
2369                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2370                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2371                            sinfo->bss_param.dtim_period);
2372                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2373                             sinfo->bss_param.beacon_interval);
2374
2375                 nla_nest_end(msg, bss_param);
2376         }
2377         if (sinfo->filled & STATION_INFO_STA_FLAGS)
2378                 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2379                         sizeof(struct nl80211_sta_flag_update),
2380                         &sinfo->sta_flags);
2381         nla_nest_end(msg, sinfoattr);
2382
2383         if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2384                 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2385                         sinfo->assoc_req_ies);
2386
2387         return genlmsg_end(msg, hdr);
2388
2389  nla_put_failure:
2390         genlmsg_cancel(msg, hdr);
2391         return -EMSGSIZE;
2392 }
2393
2394 static int nl80211_dump_station(struct sk_buff *skb,
2395                                 struct netlink_callback *cb)
2396 {
2397         struct station_info sinfo;
2398         struct cfg80211_registered_device *dev;
2399         struct net_device *netdev;
2400         u8 mac_addr[ETH_ALEN];
2401         int sta_idx = cb->args[1];
2402         int err;
2403
2404         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2405         if (err)
2406                 return err;
2407
2408         if (!dev->ops->dump_station) {
2409                 err = -EOPNOTSUPP;
2410                 goto out_err;
2411         }
2412
2413         while (1) {
2414                 memset(&sinfo, 0, sizeof(sinfo));
2415                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2416                                              mac_addr, &sinfo);
2417                 if (err == -ENOENT)
2418                         break;
2419                 if (err)
2420                         goto out_err;
2421
2422                 if (nl80211_send_station(skb,
2423                                 NETLINK_CB(cb->skb).pid,
2424                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2425                                 netdev, mac_addr,
2426                                 &sinfo) < 0)
2427                         goto out;
2428
2429                 sta_idx++;
2430         }
2431
2432
2433  out:
2434         cb->args[1] = sta_idx;
2435         err = skb->len;
2436  out_err:
2437         nl80211_finish_netdev_dump(dev);
2438
2439         return err;
2440 }
2441
2442 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2443 {
2444         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2445         struct net_device *dev = info->user_ptr[1];
2446         struct station_info sinfo;
2447         struct sk_buff *msg;
2448         u8 *mac_addr = NULL;
2449         int err;
2450
2451         memset(&sinfo, 0, sizeof(sinfo));
2452
2453         if (!info->attrs[NL80211_ATTR_MAC])
2454                 return -EINVAL;
2455
2456         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2457
2458         if (!rdev->ops->get_station)
2459                 return -EOPNOTSUPP;
2460
2461         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2462         if (err)
2463                 return err;
2464
2465         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2466         if (!msg)
2467                 return -ENOMEM;
2468
2469         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2470                                  dev, mac_addr, &sinfo) < 0) {
2471                 nlmsg_free(msg);
2472                 return -ENOBUFS;
2473         }
2474
2475         return genlmsg_reply(msg, info);
2476 }
2477
2478 /*
2479  * Get vlan interface making sure it is running and on the right wiphy.
2480  */
2481 static int get_vlan(struct genl_info *info,
2482                     struct cfg80211_registered_device *rdev,
2483                     struct net_device **vlan)
2484 {
2485         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2486         *vlan = NULL;
2487
2488         if (vlanattr) {
2489                 *vlan = dev_get_by_index(genl_info_net(info),
2490                                          nla_get_u32(vlanattr));
2491                 if (!*vlan)
2492                         return -ENODEV;
2493                 if (!(*vlan)->ieee80211_ptr)
2494                         return -EINVAL;
2495                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2496                         return -EINVAL;
2497                 if (!netif_running(*vlan))
2498                         return -ENETDOWN;
2499         }
2500         return 0;
2501 }
2502
2503 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2504 {
2505         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2506         int err;
2507         struct net_device *dev = info->user_ptr[1];
2508         struct station_parameters params;
2509         u8 *mac_addr = NULL;
2510
2511         memset(&params, 0, sizeof(params));
2512
2513         params.listen_interval = -1;
2514         params.plink_state = -1;
2515
2516         if (info->attrs[NL80211_ATTR_STA_AID])
2517                 return -EINVAL;
2518
2519         if (!info->attrs[NL80211_ATTR_MAC])
2520                 return -EINVAL;
2521
2522         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2523
2524         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2525                 params.supported_rates =
2526                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2527                 params.supported_rates_len =
2528                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2529         }
2530
2531         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2532                 params.listen_interval =
2533                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2534
2535         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2536                 params.ht_capa =
2537                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2538
2539         if (parse_station_flags(info, &params))
2540                 return -EINVAL;
2541
2542         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2543                 params.plink_action =
2544                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2545
2546         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2547                 params.plink_state =
2548                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2549
2550         err = get_vlan(info, rdev, &params.vlan);
2551         if (err)
2552                 goto out;
2553
2554         /* validate settings */
2555         err = 0;
2556
2557         switch (dev->ieee80211_ptr->iftype) {
2558         case NL80211_IFTYPE_AP:
2559         case NL80211_IFTYPE_AP_VLAN:
2560         case NL80211_IFTYPE_P2P_GO:
2561                 /* disallow mesh-specific things */
2562                 if (params.plink_action)
2563                         err = -EINVAL;
2564                 break;
2565         case NL80211_IFTYPE_P2P_CLIENT:
2566         case NL80211_IFTYPE_STATION:
2567                 /* disallow things sta doesn't support */
2568                 if (params.plink_action)
2569                         err = -EINVAL;
2570                 if (params.vlan)
2571                         err = -EINVAL;
2572                 if (params.supported_rates &&
2573                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2574                         err = -EINVAL;
2575                 if (params.ht_capa)
2576                         err = -EINVAL;
2577                 if (params.listen_interval >= 0)
2578                         err = -EINVAL;
2579                 if (params.sta_flags_mask &
2580                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2581                                   BIT(NL80211_STA_FLAG_TDLS_PEER)))
2582                         err = -EINVAL;
2583                 /* can't change the TDLS bit */
2584                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
2585                     (params.sta_flags_mask & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2586                         err = -EINVAL;
2587                 break;
2588         case NL80211_IFTYPE_MESH_POINT:
2589                 /* disallow things mesh doesn't support */
2590                 if (params.vlan)
2591                         err = -EINVAL;
2592                 if (params.ht_capa)
2593                         err = -EINVAL;
2594                 if (params.listen_interval >= 0)
2595                         err = -EINVAL;
2596                 if (params.sta_flags_mask &
2597                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2598                                   BIT(NL80211_STA_FLAG_MFP) |
2599                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2600                         err = -EINVAL;
2601                 break;
2602         default:
2603                 err = -EINVAL;
2604         }
2605
2606         if (err)
2607                 goto out;
2608
2609         if (!rdev->ops->change_station) {
2610                 err = -EOPNOTSUPP;
2611                 goto out;
2612         }
2613
2614         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2615
2616  out:
2617         if (params.vlan)
2618                 dev_put(params.vlan);
2619
2620         return err;
2621 }
2622
2623 static struct nla_policy
2624 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2625         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2626         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2627 };
2628
2629 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2630 {
2631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2632         int err;
2633         struct net_device *dev = info->user_ptr[1];
2634         struct station_parameters params;
2635         u8 *mac_addr = NULL;
2636
2637         memset(&params, 0, sizeof(params));
2638
2639         if (!info->attrs[NL80211_ATTR_MAC])
2640                 return -EINVAL;
2641
2642         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2643                 return -EINVAL;
2644
2645         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2646                 return -EINVAL;
2647
2648         if (!info->attrs[NL80211_ATTR_STA_AID])
2649                 return -EINVAL;
2650
2651         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2652         params.supported_rates =
2653                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2654         params.supported_rates_len =
2655                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2656         params.listen_interval =
2657                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2658
2659         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2660         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2661                 return -EINVAL;
2662
2663         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2664                 params.ht_capa =
2665                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2666
2667         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2668                 params.plink_action =
2669                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2670
2671         if (parse_station_flags(info, &params))
2672                 return -EINVAL;
2673
2674         /* parse WME attributes if sta is WME capable */
2675         if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2676             (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2677             info->attrs[NL80211_ATTR_STA_WME]) {
2678                 struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2679                 struct nlattr *nla;
2680
2681                 nla = info->attrs[NL80211_ATTR_STA_WME];
2682                 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2683                                        nl80211_sta_wme_policy);
2684                 if (err)
2685                         return err;
2686
2687                 if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2688                         params.uapsd_queues =
2689                              nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2690                 if (params.uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2691                         return -EINVAL;
2692
2693                 if (tb[NL80211_STA_WME_MAX_SP])
2694                         params.max_sp =
2695                              nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2696
2697                 if (params.max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2698                         return -EINVAL;
2699
2700                 params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2701         }
2702
2703         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2704             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2705             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2706             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO &&
2707             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION)
2708                 return -EINVAL;
2709
2710         /*
2711          * Only managed stations can add TDLS peers, and only when the
2712          * wiphy supports external TDLS setup.
2713          */
2714         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_STATION &&
2715             !((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
2716               (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
2717               (rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)))
2718                 return -EINVAL;
2719
2720         err = get_vlan(info, rdev, &params.vlan);
2721         if (err)
2722                 goto out;
2723
2724         /* validate settings */
2725         err = 0;
2726
2727         if (!rdev->ops->add_station) {
2728                 err = -EOPNOTSUPP;
2729                 goto out;
2730         }
2731
2732         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2733
2734  out:
2735         if (params.vlan)
2736                 dev_put(params.vlan);
2737         return err;
2738 }
2739
2740 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2741 {
2742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2743         struct net_device *dev = info->user_ptr[1];
2744         u8 *mac_addr = NULL;
2745
2746         if (info->attrs[NL80211_ATTR_MAC])
2747                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2748
2749         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2750             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2751             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2752             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2753                 return -EINVAL;
2754
2755         if (!rdev->ops->del_station)
2756                 return -EOPNOTSUPP;
2757
2758         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2759 }
2760
2761 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2762                                 int flags, struct net_device *dev,
2763                                 u8 *dst, u8 *next_hop,
2764                                 struct mpath_info *pinfo)
2765 {
2766         void *hdr;
2767         struct nlattr *pinfoattr;
2768
2769         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2770         if (!hdr)
2771                 return -1;
2772
2773         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2774         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2775         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2776
2777         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2778
2779         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2780         if (!pinfoattr)
2781                 goto nla_put_failure;
2782         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2783                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2784                             pinfo->frame_qlen);
2785         if (pinfo->filled & MPATH_INFO_SN)
2786                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2787                             pinfo->sn);
2788         if (pinfo->filled & MPATH_INFO_METRIC)
2789                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2790                             pinfo->metric);
2791         if (pinfo->filled & MPATH_INFO_EXPTIME)
2792                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2793                             pinfo->exptime);
2794         if (pinfo->filled & MPATH_INFO_FLAGS)
2795                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2796                             pinfo->flags);
2797         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2798                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2799                             pinfo->discovery_timeout);
2800         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2801                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2802                             pinfo->discovery_retries);
2803
2804         nla_nest_end(msg, pinfoattr);
2805
2806         return genlmsg_end(msg, hdr);
2807
2808  nla_put_failure:
2809         genlmsg_cancel(msg, hdr);
2810         return -EMSGSIZE;
2811 }
2812
2813 static int nl80211_dump_mpath(struct sk_buff *skb,
2814                               struct netlink_callback *cb)
2815 {
2816         struct mpath_info pinfo;
2817         struct cfg80211_registered_device *dev;
2818         struct net_device *netdev;
2819         u8 dst[ETH_ALEN];
2820         u8 next_hop[ETH_ALEN];
2821         int path_idx = cb->args[1];
2822         int err;
2823
2824         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2825         if (err)
2826                 return err;
2827
2828         if (!dev->ops->dump_mpath) {
2829                 err = -EOPNOTSUPP;
2830                 goto out_err;
2831         }
2832
2833         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2834                 err = -EOPNOTSUPP;
2835                 goto out_err;
2836         }
2837
2838         while (1) {
2839                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2840                                            dst, next_hop, &pinfo);
2841                 if (err == -ENOENT)
2842                         break;
2843                 if (err)
2844                         goto out_err;
2845
2846                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2847                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2848                                        netdev, dst, next_hop,
2849                                        &pinfo) < 0)
2850                         goto out;
2851
2852                 path_idx++;
2853         }
2854
2855
2856  out:
2857         cb->args[1] = path_idx;
2858         err = skb->len;
2859  out_err:
2860         nl80211_finish_netdev_dump(dev);
2861         return err;
2862 }
2863
2864 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2865 {
2866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2867         int err;
2868         struct net_device *dev = info->user_ptr[1];
2869         struct mpath_info pinfo;
2870         struct sk_buff *msg;
2871         u8 *dst = NULL;
2872         u8 next_hop[ETH_ALEN];
2873
2874         memset(&pinfo, 0, sizeof(pinfo));
2875
2876         if (!info->attrs[NL80211_ATTR_MAC])
2877                 return -EINVAL;
2878
2879         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2880
2881         if (!rdev->ops->get_mpath)
2882                 return -EOPNOTSUPP;
2883
2884         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2885                 return -EOPNOTSUPP;
2886
2887         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2888         if (err)
2889                 return err;
2890
2891         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2892         if (!msg)
2893                 return -ENOMEM;
2894
2895         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2896                                  dev, dst, next_hop, &pinfo) < 0) {
2897                 nlmsg_free(msg);
2898                 return -ENOBUFS;
2899         }
2900
2901         return genlmsg_reply(msg, info);
2902 }
2903
2904 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2905 {
2906         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2907         struct net_device *dev = info->user_ptr[1];
2908         u8 *dst = NULL;
2909         u8 *next_hop = NULL;
2910
2911         if (!info->attrs[NL80211_ATTR_MAC])
2912                 return -EINVAL;
2913
2914         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2915                 return -EINVAL;
2916
2917         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2918         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2919
2920         if (!rdev->ops->change_mpath)
2921                 return -EOPNOTSUPP;
2922
2923         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2924                 return -EOPNOTSUPP;
2925
2926         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2927 }
2928
2929 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2930 {
2931         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2932         struct net_device *dev = info->user_ptr[1];
2933         u8 *dst = NULL;
2934         u8 *next_hop = NULL;
2935
2936         if (!info->attrs[NL80211_ATTR_MAC])
2937                 return -EINVAL;
2938
2939         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2940                 return -EINVAL;
2941
2942         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2943         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2944
2945         if (!rdev->ops->add_mpath)
2946                 return -EOPNOTSUPP;
2947
2948         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2949                 return -EOPNOTSUPP;
2950
2951         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2952 }
2953
2954 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2955 {
2956         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2957         struct net_device *dev = info->user_ptr[1];
2958         u8 *dst = NULL;
2959
2960         if (info->attrs[NL80211_ATTR_MAC])
2961                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2962
2963         if (!rdev->ops->del_mpath)
2964                 return -EOPNOTSUPP;
2965
2966         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2967 }
2968
2969 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2970 {
2971         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2972         struct net_device *dev = info->user_ptr[1];
2973         struct bss_parameters params;
2974
2975         memset(&params, 0, sizeof(params));
2976         /* default to not changing parameters */
2977         params.use_cts_prot = -1;
2978         params.use_short_preamble = -1;
2979         params.use_short_slot_time = -1;
2980         params.ap_isolate = -1;
2981         params.ht_opmode = -1;
2982
2983         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2984                 params.use_cts_prot =
2985                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2986         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2987                 params.use_short_preamble =
2988                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2989         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2990                 params.use_short_slot_time =
2991                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2992         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2993                 params.basic_rates =
2994                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2995                 params.basic_rates_len =
2996                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2997         }
2998         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2999                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3000         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3001                 params.ht_opmode =
3002                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3003
3004         if (!rdev->ops->change_bss)
3005                 return -EOPNOTSUPP;
3006
3007         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3008             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3009                 return -EOPNOTSUPP;
3010
3011         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3012 }
3013
3014 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3015         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3016         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3017         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3018         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3019         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3020         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3021 };
3022
3023 static int parse_reg_rule(struct nlattr *tb[],
3024         struct ieee80211_reg_rule *reg_rule)
3025 {
3026         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3027         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3028
3029         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3030                 return -EINVAL;
3031         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3032                 return -EINVAL;
3033         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3034                 return -EINVAL;
3035         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3036                 return -EINVAL;
3037         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3038                 return -EINVAL;
3039
3040         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3041
3042         freq_range->start_freq_khz =
3043                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3044         freq_range->end_freq_khz =
3045                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3046         freq_range->max_bandwidth_khz =
3047                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3048
3049         power_rule->max_eirp =
3050                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3051
3052         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3053                 power_rule->max_antenna_gain =
3054                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3055
3056         return 0;
3057 }
3058
3059 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3060 {
3061         int r;
3062         char *data = NULL;
3063
3064         /*
3065          * You should only get this when cfg80211 hasn't yet initialized
3066          * completely when built-in to the kernel right between the time
3067          * window between nl80211_init() and regulatory_init(), if that is
3068          * even possible.
3069          */
3070         mutex_lock(&cfg80211_mutex);
3071         if (unlikely(!cfg80211_regdomain)) {
3072                 mutex_unlock(&cfg80211_mutex);
3073                 return -EINPROGRESS;
3074         }
3075         mutex_unlock(&cfg80211_mutex);
3076
3077         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3078                 return -EINVAL;
3079
3080         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3081
3082         r = regulatory_hint_user(data);
3083
3084         return r;
3085 }
3086
3087 static int nl80211_get_mesh_config(struct sk_buff *skb,
3088                                    struct genl_info *info)
3089 {
3090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3091         struct net_device *dev = info->user_ptr[1];
3092         struct wireless_dev *wdev = dev->ieee80211_ptr;
3093         struct mesh_config cur_params;
3094         int err = 0;
3095         void *hdr;
3096         struct nlattr *pinfoattr;
3097         struct sk_buff *msg;
3098
3099         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3100                 return -EOPNOTSUPP;
3101
3102         if (!rdev->ops->get_mesh_config)
3103                 return -EOPNOTSUPP;
3104
3105         wdev_lock(wdev);
3106         /* If not connected, get default parameters */
3107         if (!wdev->mesh_id_len)
3108                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3109         else
3110                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3111                                                  &cur_params);
3112         wdev_unlock(wdev);
3113
3114         if (err)
3115                 return err;
3116
3117         /* Draw up a netlink message to send back */
3118         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3119         if (!msg)
3120                 return -ENOMEM;
3121         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3122                              NL80211_CMD_GET_MESH_CONFIG);
3123         if (!hdr)
3124                 goto out;
3125         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3126         if (!pinfoattr)
3127                 goto nla_put_failure;
3128         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3129         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3130                         cur_params.dot11MeshRetryTimeout);
3131         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3132                         cur_params.dot11MeshConfirmTimeout);
3133         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3134                         cur_params.dot11MeshHoldingTimeout);
3135         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3136                         cur_params.dot11MeshMaxPeerLinks);
3137         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3138                         cur_params.dot11MeshMaxRetries);
3139         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3140                         cur_params.dot11MeshTTL);
3141         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3142                         cur_params.element_ttl);
3143         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3144                         cur_params.auto_open_plinks);
3145         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3146                         cur_params.dot11MeshHWMPmaxPREQretries);
3147         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3148                         cur_params.path_refresh_time);
3149         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3150                         cur_params.min_discovery_timeout);
3151         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3152                         cur_params.dot11MeshHWMPactivePathTimeout);
3153         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3154                         cur_params.dot11MeshHWMPpreqMinInterval);
3155         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3156                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3157         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3158                         cur_params.dot11MeshHWMPRootMode);
3159         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3160                         cur_params.dot11MeshHWMPRannInterval);
3161         NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3162                         cur_params.dot11MeshGateAnnouncementProtocol);
3163         nla_nest_end(msg, pinfoattr);
3164         genlmsg_end(msg, hdr);
3165         return genlmsg_reply(msg, info);
3166
3167  nla_put_failure:
3168         genlmsg_cancel(msg, hdr);
3169  out:
3170         nlmsg_free(msg);
3171         return -ENOBUFS;
3172 }
3173
3174 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3175         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3176         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3177         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3178         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3179         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3180         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3181         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3182         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3183
3184         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3185         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3186         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3187         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3188         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3189         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3190         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3191         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3192         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3193 };
3194
3195 static const struct nla_policy
3196         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3197         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3198         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3199         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3200         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3201                 .len = IEEE80211_MAX_DATA_LEN },
3202         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3203 };
3204
3205 static int nl80211_parse_mesh_config(struct genl_info *info,
3206                                      struct mesh_config *cfg,
3207                                      u32 *mask_out)
3208 {
3209         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3210         u32 mask = 0;
3211
3212 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3213 do {\
3214         if (table[attr_num]) {\
3215                 cfg->param = nla_fn(table[attr_num]); \
3216                 mask |= (1 << (attr_num - 1)); \
3217         } \
3218 } while (0);\
3219
3220
3221         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3222                 return -EINVAL;
3223         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3224                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3225                              nl80211_meshconf_params_policy))
3226                 return -EINVAL;
3227
3228         /* This makes sure that there aren't more than 32 mesh config
3229          * parameters (otherwise our bitfield scheme would not work.) */
3230         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3231
3232         /* Fill in the params struct */
3233         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3234                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3235         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3236                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3237         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3238                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3239         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3240                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3241         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3242                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3243         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3244                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3245         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3246                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3247         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3248                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3249         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3250                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3251                         nla_get_u8);
3252         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3253                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3254         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3255                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3256                         nla_get_u16);
3257         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3258                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3259                         nla_get_u32);
3260         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3261                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3262                         nla_get_u16);
3263         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3264                         dot11MeshHWMPnetDiameterTraversalTime,
3265                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3266                         nla_get_u16);
3267         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3268                         dot11MeshHWMPRootMode, mask,
3269                         NL80211_MESHCONF_HWMP_ROOTMODE,
3270                         nla_get_u8);
3271         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3272                         dot11MeshHWMPRannInterval, mask,
3273                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3274                         nla_get_u16);
3275         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3276                         dot11MeshGateAnnouncementProtocol, mask,
3277                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3278                         nla_get_u8);
3279         if (mask_out)
3280                 *mask_out = mask;
3281
3282         return 0;
3283
3284 #undef FILL_IN_MESH_PARAM_IF_SET
3285 }
3286
3287 static int nl80211_parse_mesh_setup(struct genl_info *info,
3288                                      struct mesh_setup *setup)
3289 {
3290         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3291
3292         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3293                 return -EINVAL;
3294         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3295                              info->attrs[NL80211_ATTR_MESH_SETUP],
3296                              nl80211_mesh_setup_params_policy))
3297                 return -EINVAL;
3298
3299         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3300                 setup->path_sel_proto =
3301                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3302                  IEEE80211_PATH_PROTOCOL_VENDOR :
3303                  IEEE80211_PATH_PROTOCOL_HWMP;
3304
3305         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3306                 setup->path_metric =
3307                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3308                  IEEE80211_PATH_METRIC_VENDOR :
3309                  IEEE80211_PATH_METRIC_AIRTIME;
3310
3311
3312         if (tb[NL80211_MESH_SETUP_IE]) {
3313                 struct nlattr *ieattr =
3314                         tb[NL80211_MESH_SETUP_IE];
3315                 if (!is_valid_ie_attr(ieattr))
3316                         return -EINVAL;
3317                 setup->ie = nla_data(ieattr);
3318                 setup->ie_len = nla_len(ieattr);
3319         }
3320         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3321         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3322
3323         return 0;
3324 }
3325
3326 static int nl80211_update_mesh_config(struct sk_buff *skb,
3327                                       struct genl_info *info)
3328 {
3329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3330         struct net_device *dev = info->user_ptr[1];
3331         struct wireless_dev *wdev = dev->ieee80211_ptr;
3332         struct mesh_config cfg;
3333         u32 mask;
3334         int err;
3335
3336         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3337                 return -EOPNOTSUPP;
3338
3339         if (!rdev->ops->update_mesh_config)
3340                 return -EOPNOTSUPP;
3341
3342         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3343         if (err)
3344                 return err;
3345
3346         wdev_lock(wdev);
3347         if (!wdev->mesh_id_len)
3348                 err = -ENOLINK;
3349
3350         if (!err)
3351                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3352                                                     mask, &cfg);
3353
3354         wdev_unlock(wdev);
3355
3356         return err;
3357 }
3358
3359 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3360 {
3361         struct sk_buff *msg;
3362         void *hdr = NULL;
3363         struct nlattr *nl_reg_rules;
3364         unsigned int i;
3365         int err = -EINVAL;
3366
3367         mutex_lock(&cfg80211_mutex);
3368
3369         if (!cfg80211_regdomain)
3370                 goto out;
3371
3372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3373         if (!msg) {
3374                 err = -ENOBUFS;
3375                 goto out;
3376         }
3377
3378         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3379                              NL80211_CMD_GET_REG);
3380         if (!hdr)
3381                 goto put_failure;
3382
3383         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3384                 cfg80211_regdomain->alpha2);
3385
3386         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3387         if (!nl_reg_rules)
3388                 goto nla_put_failure;
3389
3390         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3391                 struct nlattr *nl_reg_rule;
3392                 const struct ieee80211_reg_rule *reg_rule;
3393                 const struct ieee80211_freq_range *freq_range;
3394                 const struct ieee80211_power_rule *power_rule;
3395
3396                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3397                 freq_range = &reg_rule->freq_range;
3398                 power_rule = &reg_rule->power_rule;
3399
3400                 nl_reg_rule = nla_nest_start(msg, i);
3401                 if (!nl_reg_rule)
3402                         goto nla_put_failure;
3403
3404                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3405                         reg_rule->flags);
3406                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3407                         freq_range->start_freq_khz);
3408                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3409                         freq_range->end_freq_khz);
3410                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3411                         freq_range->max_bandwidth_khz);
3412                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3413                         power_rule->max_antenna_gain);
3414                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3415                         power_rule->max_eirp);
3416
3417                 nla_nest_end(msg, nl_reg_rule);
3418         }
3419
3420         nla_nest_end(msg, nl_reg_rules);
3421
3422         genlmsg_end(msg, hdr);
3423         err = genlmsg_reply(msg, info);
3424         goto out;
3425
3426 nla_put_failure:
3427         genlmsg_cancel(msg, hdr);
3428 put_failure:
3429         nlmsg_free(msg);
3430         err = -EMSGSIZE;
3431 out:
3432         mutex_unlock(&cfg80211_mutex);
3433         return err;
3434 }
3435
3436 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3437 {
3438         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3439         struct nlattr *nl_reg_rule;
3440         char *alpha2 = NULL;
3441         int rem_reg_rules = 0, r = 0;
3442         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3443         struct ieee80211_regdomain *rd = NULL;
3444
3445         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3446                 return -EINVAL;
3447
3448         if (!info->attrs[NL80211_ATTR_REG_RULES])
3449                 return -EINVAL;
3450
3451         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3452
3453         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3454                         rem_reg_rules) {
3455                 num_rules++;
3456                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3457                         return -EINVAL;
3458         }
3459
3460         mutex_lock(&cfg80211_mutex);
3461
3462         if (!reg_is_valid_request(alpha2)) {
3463                 r = -EINVAL;
3464                 goto bad_reg;
3465         }
3466
3467         size_of_regd = sizeof(struct ieee80211_regdomain) +
3468                 (num_rules * sizeof(struct ieee80211_reg_rule));
3469
3470         rd = kzalloc(size_of_regd, GFP_KERNEL);
3471         if (!rd) {
3472                 r = -ENOMEM;
3473                 goto bad_reg;
3474         }
3475
3476         rd->n_reg_rules = num_rules;
3477         rd->alpha2[0] = alpha2[0];
3478         rd->alpha2[1] = alpha2[1];
3479
3480         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3481                         rem_reg_rules) {
3482                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3483                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3484                         reg_rule_policy);
3485                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3486                 if (r)
3487                         goto bad_reg;
3488
3489                 rule_idx++;
3490
3491                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3492                         r = -EINVAL;
3493                         goto bad_reg;
3494                 }
3495         }
3496
3497         BUG_ON(rule_idx != num_rules);
3498
3499         r = set_regdom(rd);
3500
3501         mutex_unlock(&cfg80211_mutex);
3502
3503         return r;
3504
3505  bad_reg:
3506         mutex_unlock(&cfg80211_mutex);
3507         kfree(rd);
3508         return r;
3509 }
3510
3511 static int validate_scan_freqs(struct nlattr *freqs)
3512 {
3513         struct nlattr *attr1, *attr2;
3514         int n_channels = 0, tmp1, tmp2;
3515
3516         nla_for_each_nested(attr1, freqs, tmp1) {
3517                 n_channels++;
3518                 /*
3519                  * Some hardware has a limited channel list for
3520                  * scanning, and it is pretty much nonsensical
3521                  * to scan for a channel twice, so disallow that
3522                  * and don't require drivers to check that the
3523                  * channel list they get isn't longer than what
3524                  * they can scan, as long as they can scan all
3525                  * the channels they registered at once.
3526                  */
3527                 nla_for_each_nested(attr2, freqs, tmp2)
3528                         if (attr1 != attr2 &&
3529                             nla_get_u32(attr1) == nla_get_u32(attr2))
3530                                 return 0;
3531         }
3532
3533         return n_channels;
3534 }
3535
3536 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3537 {
3538         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3539         struct net_device *dev = info->user_ptr[1];
3540         struct cfg80211_scan_request *request;
3541         struct nlattr *attr;
3542         struct wiphy *wiphy;
3543         int err, tmp, n_ssids = 0, n_channels, i;
3544         size_t ie_len;
3545
3546         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3547                 return -EINVAL;
3548
3549         wiphy = &rdev->wiphy;
3550
3551         if (!rdev->ops->scan)
3552                 return -EOPNOTSUPP;
3553
3554         if (rdev->scan_req)
3555                 return -EBUSY;
3556
3557         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3558                 n_channels = validate_scan_freqs(
3559                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3560                 if (!n_channels)
3561                         return -EINVAL;
3562         } else {
3563                 enum ieee80211_band band;
3564                 n_channels = 0;
3565
3566                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3567                         if (wiphy->bands[band])
3568                                 n_channels += wiphy->bands[band]->n_channels;
3569         }
3570
3571         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3572                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3573                         n_ssids++;
3574
3575         if (n_ssids > wiphy->max_scan_ssids)
3576                 return -EINVAL;
3577
3578         if (info->attrs[NL80211_ATTR_IE])
3579                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3580         else
3581                 ie_len = 0;
3582
3583         if (ie_len > wiphy->max_scan_ie_len)
3584                 return -EINVAL;
3585
3586         request = kzalloc(sizeof(*request)
3587                         + sizeof(*request->ssids) * n_ssids
3588                         + sizeof(*request->channels) * n_channels
3589                         + ie_len, GFP_KERNEL);
3590         if (!request)
3591                 return -ENOMEM;
3592
3593         if (n_ssids)
3594                 request->ssids = (void *)&request->channels[n_channels];
3595         request->n_ssids = n_ssids;
3596         if (ie_len) {
3597                 if (request->ssids)
3598                         request->ie = (void *)(request->ssids + n_ssids);
3599                 else
3600                         request->ie = (void *)(request->channels + n_channels);
3601         }
3602
3603         i = 0;
3604         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3605                 /* user specified, bail out if channel not found */
3606                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3607                         struct ieee80211_channel *chan;
3608
3609                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3610
3611                         if (!chan) {
3612                                 err = -EINVAL;
3613                                 goto out_free;
3614                         }
3615
3616                         /* ignore disabled channels */
3617                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3618                                 continue;
3619
3620                         request->channels[i] = chan;
3621                         i++;
3622                 }
3623         } else {
3624                 enum ieee80211_band band;
3625
3626                 /* all channels */
3627                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3628                         int j;
3629                         if (!wiphy->bands[band])
3630                                 continue;
3631                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3632                                 struct ieee80211_channel *chan;
3633
3634                                 chan = &wiphy->bands[band]->channels[j];
3635
3636                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3637                                         continue;
3638
3639                                 request->channels[i] = chan;
3640                                 i++;
3641                         }
3642                 }
3643         }
3644
3645         if (!i) {
3646                 err = -EINVAL;
3647                 goto out_free;
3648         }
3649
3650         request->n_channels = i;
3651
3652         i = 0;
3653         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3654                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3655                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3656                                 err = -EINVAL;
3657                                 goto out_free;
3658                         }
3659                         request->ssids[i].ssid_len = nla_len(attr);
3660                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3661                         i++;
3662                 }
3663         }
3664
3665         if (info->attrs[NL80211_ATTR_IE]) {
3666                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3667                 memcpy((void *)request->ie,
3668                        nla_data(info->attrs[NL80211_ATTR_IE]),
3669                        request->ie_len);
3670         }
3671
3672         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3673                 if (wiphy->bands[i])
3674                         request->rates[i] =
3675                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3676
3677         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3678                 nla_for_each_nested(attr,
3679                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3680                                     tmp) {
3681                         enum ieee80211_band band = nla_type(attr);
3682
3683                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3684                                 err = -EINVAL;
3685                                 goto out_free;
3686                         }
3687                         err = ieee80211_get_ratemask(wiphy->bands[band],
3688                                                      nla_data(attr),
3689                                                      nla_len(attr),
3690                                                      &request->rates[band]);
3691                         if (err)
3692                                 goto out_free;
3693                 }
3694         }
3695
3696         request->no_cck =
3697                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3698
3699         request->dev = dev;
3700         request->wiphy = &rdev->wiphy;
3701
3702         rdev->scan_req = request;
3703         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3704
3705         if (!err) {
3706                 nl80211_send_scan_start(rdev, dev);
3707                 dev_hold(dev);
3708         } else {
3709  out_free:
3710                 rdev->scan_req = NULL;
3711                 kfree(request);
3712         }
3713
3714         return err;
3715 }
3716
3717 static int nl80211_start_sched_scan(struct sk_buff *skb,
3718                                     struct genl_info *info)
3719 {
3720         struct cfg80211_sched_scan_request *request;
3721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3722         struct net_device *dev = info->user_ptr[1];
3723         struct nlattr *attr;
3724         struct wiphy *wiphy;
3725         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3726         u32 interval;
3727         enum ieee80211_band band;
3728         size_t ie_len;
3729         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3730
3731         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3732             !rdev->ops->sched_scan_start)
3733                 return -EOPNOTSUPP;
3734
3735         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3736                 return -EINVAL;
3737
3738         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3739                 return -EINVAL;
3740
3741         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3742         if (interval == 0)
3743                 return -EINVAL;
3744
3745         wiphy = &rdev->wiphy;
3746
3747         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3748                 n_channels = validate_scan_freqs(
3749                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3750                 if (!n_channels)
3751                         return -EINVAL;
3752         } else {
3753                 n_channels = 0;
3754
3755                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3756                         if (wiphy->bands[band])
3757                                 n_channels += wiphy->bands[band]->n_channels;
3758         }
3759
3760         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3761                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3762                                     tmp)
3763                         n_ssids++;
3764
3765         if (n_ssids > wiphy->max_sched_scan_ssids)
3766                 return -EINVAL;
3767
3768         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3769                 nla_for_each_nested(attr,
3770                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3771                                     tmp)
3772                         n_match_sets++;
3773
3774         if (n_match_sets > wiphy->max_match_sets)
3775                 return -EINVAL;
3776
3777         if (info->attrs[NL80211_ATTR_IE])
3778                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3779         else
3780                 ie_len = 0;
3781
3782         if (ie_len > wiphy->max_sched_scan_ie_len)
3783                 return -EINVAL;
3784
3785         mutex_lock(&rdev->sched_scan_mtx);
3786
3787         if (rdev->sched_scan_req) {
3788                 err = -EINPROGRESS;
3789                 goto out;
3790         }
3791
3792         request = kzalloc(sizeof(*request)
3793                         + sizeof(*request->ssids) * n_ssids
3794                         + sizeof(*request->match_sets) * n_match_sets
3795                         + sizeof(*request->channels) * n_channels
3796                         + ie_len, GFP_KERNEL);
3797         if (!request) {
3798                 err = -ENOMEM;
3799                 goto out;
3800         }
3801
3802         if (n_ssids)
3803                 request->ssids = (void *)&request->channels[n_channels];
3804         request->n_ssids = n_ssids;
3805         if (ie_len) {
3806                 if (request->ssids)
3807                         request->ie = (void *)(request->ssids + n_ssids);
3808                 else
3809                         request->ie = (void *)(request->channels + n_channels);
3810         }
3811
3812         if (n_match_sets) {
3813                 if (request->ie)
3814                         request->match_sets = (void *)(request->ie + ie_len);
3815                 else if (request->ssids)
3816                         request->match_sets =
3817                                 (void *)(request->ssids + n_ssids);
3818                 else
3819                         request->match_sets =
3820                                 (void *)(request->channels + n_channels);
3821         }
3822         request->n_match_sets = n_match_sets;
3823
3824         i = 0;
3825         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3826                 /* user specified, bail out if channel not found */
3827                 nla_for_each_nested(attr,
3828                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3829                                     tmp) {
3830                         struct ieee80211_channel *chan;
3831
3832                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3833
3834                         if (!chan) {
3835                                 err = -EINVAL;
3836                                 goto out_free;
3837                         }
3838
3839                         /* ignore disabled channels */
3840                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3841                                 continue;
3842
3843                         request->channels[i] = chan;
3844                         i++;
3845                 }
3846         } else {
3847                 /* all channels */
3848                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3849                         int j;
3850                         if (!wiphy->bands[band])
3851                                 continue;
3852                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3853                                 struct ieee80211_channel *chan;
3854
3855                                 chan = &wiphy->bands[band]->channels[j];
3856
3857                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3858                                         continue;
3859
3860                                 request->channels[i] = chan;
3861                                 i++;
3862                         }
3863                 }
3864         }
3865
3866         if (!i) {
3867                 err = -EINVAL;
3868                 goto out_free;
3869         }
3870
3871         request->n_channels = i;
3872
3873         i = 0;
3874         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3875                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3876                                     tmp) {
3877                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3878                                 err = -EINVAL;
3879                                 goto out_free;
3880                         }
3881                         request->ssids[i].ssid_len = nla_len(attr);
3882                         memcpy(request->ssids[i].ssid, nla_data(attr),
3883                                nla_len(attr));
3884                         i++;
3885                 }
3886         }
3887
3888         i = 0;
3889         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
3890                 nla_for_each_nested(attr,
3891                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3892                                     tmp) {
3893                         struct nlattr *ssid;
3894
3895                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
3896                                   nla_data(attr), nla_len(attr),
3897                                   nl80211_match_policy);
3898                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
3899                         if (ssid) {
3900                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
3901                                         err = -EINVAL;
3902                                         goto out_free;
3903                                 }
3904                                 memcpy(request->match_sets[i].ssid.ssid,
3905                                        nla_data(ssid), nla_len(ssid));
3906                                 request->match_sets[i].ssid.ssid_len =
3907                                         nla_len(ssid);
3908                         }
3909                         i++;
3910                 }
3911         }
3912
3913         if (info->attrs[NL80211_ATTR_IE]) {
3914                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3915                 memcpy((void *)request->ie,
3916                        nla_data(info->attrs[NL80211_ATTR_IE]),
3917                        request->ie_len);
3918         }
3919
3920         request->dev = dev;
3921         request->wiphy = &rdev->wiphy;
3922         request->interval = interval;
3923
3924         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
3925         if (!err) {
3926                 rdev->sched_scan_req = request;
3927                 nl80211_send_sched_scan(rdev, dev,
3928                                         NL80211_CMD_START_SCHED_SCAN);
3929                 goto out;
3930         }
3931
3932 out_free:
3933         kfree(request);
3934 out:
3935         mutex_unlock(&rdev->sched_scan_mtx);
3936         return err;
3937 }
3938
3939 static int nl80211_stop_sched_scan(struct sk_buff *skb,
3940                                    struct genl_info *info)
3941 {
3942         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3943         int err;
3944
3945         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3946             !rdev->ops->sched_scan_stop)
3947                 return -EOPNOTSUPP;
3948
3949         mutex_lock(&rdev->sched_scan_mtx);
3950         err = __cfg80211_stop_sched_scan(rdev, false);
3951         mutex_unlock(&rdev->sched_scan_mtx);
3952
3953         return err;
3954 }
3955
3956 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
3957                             u32 seq, int flags,
3958                             struct cfg80211_registered_device *rdev,
3959                             struct wireless_dev *wdev,
3960                             struct cfg80211_internal_bss *intbss)
3961 {
3962         struct cfg80211_bss *res = &intbss->pub;
3963         void *hdr;
3964         struct nlattr *bss;
3965         int i;
3966
3967         ASSERT_WDEV_LOCK(wdev);
3968
3969         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
3970                              NL80211_CMD_NEW_SCAN_RESULTS);
3971         if (!hdr)
3972                 return -1;
3973
3974         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
3975
3976         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3977         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3978
3979         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3980         if (!bss)
3981                 goto nla_put_failure;
3982         if (!is_zero_ether_addr(res->bssid))
3983                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3984         if (res->information_elements && res->len_information_elements)
3985                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3986                         res->len_information_elements,
3987                         res->information_elements);
3988         if (res->beacon_ies && res->len_beacon_ies &&
3989             res->beacon_ies != res->information_elements)
3990                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3991                         res->len_beacon_ies, res->beacon_ies);
3992         if (res->tsf)
3993                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3994         if (res->beacon_interval)
3995                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3996         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3997         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3998         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3999                 jiffies_to_msecs(jiffies - intbss->ts));
4000
4001         switch (rdev->wiphy.signal_type) {
4002         case CFG80211_SIGNAL_TYPE_MBM:
4003                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
4004                 break;
4005         case CFG80211_SIGNAL_TYPE_UNSPEC:
4006                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
4007                 break;
4008         default:
4009                 break;
4010         }
4011
4012         switch (wdev->iftype) {
4013         case NL80211_IFTYPE_P2P_CLIENT:
4014         case NL80211_IFTYPE_STATION:
4015                 if (intbss == wdev->current_bss)
4016                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4017                                     NL80211_BSS_STATUS_ASSOCIATED);
4018                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
4019                         if (intbss != wdev->auth_bsses[i])
4020                                 continue;
4021                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4022                                     NL80211_BSS_STATUS_AUTHENTICATED);
4023                         break;
4024                 }
4025                 break;
4026         case NL80211_IFTYPE_ADHOC:
4027                 if (intbss == wdev->current_bss)
4028                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4029                                     NL80211_BSS_STATUS_IBSS_JOINED);
4030                 break;
4031         default:
4032                 break;
4033         }
4034
4035         nla_nest_end(msg, bss);
4036
4037         return genlmsg_end(msg, hdr);
4038
4039  nla_put_failure:
4040         genlmsg_cancel(msg, hdr);
4041         return -EMSGSIZE;
4042 }
4043
4044 static int nl80211_dump_scan(struct sk_buff *skb,
4045                              struct netlink_callback *cb)
4046 {
4047         struct cfg80211_registered_device *rdev;
4048         struct net_device *dev;
4049         struct cfg80211_internal_bss *scan;
4050         struct wireless_dev *wdev;
4051         int start = cb->args[1], idx = 0;
4052         int err;
4053
4054         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4055         if (err)
4056                 return err;
4057
4058         wdev = dev->ieee80211_ptr;
4059
4060         wdev_lock(wdev);
4061         spin_lock_bh(&rdev->bss_lock);
4062         cfg80211_bss_expire(rdev);
4063
4064         cb->seq = rdev->bss_generation;
4065
4066         list_for_each_entry(scan, &rdev->bss_list, list) {
4067                 if (++idx <= start)
4068                         continue;
4069                 if (nl80211_send_bss(skb, cb,
4070                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4071                                 rdev, wdev, scan) < 0) {
4072                         idx--;
4073                         break;
4074                 }
4075         }
4076
4077         spin_unlock_bh(&rdev->bss_lock);
4078         wdev_unlock(wdev);
4079
4080         cb->args[1] = idx;
4081         nl80211_finish_netdev_dump(rdev);
4082
4083         return skb->len;
4084 }
4085
4086 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4087                                 int flags, struct net_device *dev,
4088                                 struct survey_info *survey)
4089 {
4090         void *hdr;
4091         struct nlattr *infoattr;
4092
4093         hdr = nl80211hdr_put(msg, pid, seq, flags,
4094                              NL80211_CMD_NEW_SURVEY_RESULTS);
4095         if (!hdr)
4096                 return -ENOMEM;
4097
4098         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4099
4100         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4101         if (!infoattr)
4102                 goto nla_put_failure;
4103
4104         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4105                     survey->channel->center_freq);
4106         if (survey->filled & SURVEY_INFO_NOISE_DBM)
4107                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4108                             survey->noise);
4109         if (survey->filled & SURVEY_INFO_IN_USE)
4110                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4111         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4112                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4113                             survey->channel_time);
4114         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4115                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4116                             survey->channel_time_busy);
4117         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4118                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4119                             survey->channel_time_ext_busy);
4120         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4121                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4122                             survey->channel_time_rx);
4123         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4124                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4125                             survey->channel_time_tx);
4126
4127         nla_nest_end(msg, infoattr);
4128
4129         return genlmsg_end(msg, hdr);
4130
4131  nla_put_failure:
4132         genlmsg_cancel(msg, hdr);
4133         return -EMSGSIZE;
4134 }
4135
4136 static int nl80211_dump_survey(struct sk_buff *skb,
4137                         struct netlink_callback *cb)
4138 {
4139         struct survey_info survey;
4140         struct cfg80211_registered_device *dev;
4141         struct net_device *netdev;
4142         int survey_idx = cb->args[1];
4143         int res;
4144
4145         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4146         if (res)
4147                 return res;
4148
4149         if (!dev->ops->dump_survey) {
4150                 res = -EOPNOTSUPP;
4151                 goto out_err;
4152         }
4153
4154         while (1) {
4155                 struct ieee80211_channel *chan;
4156
4157                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4158                                             &survey);
4159                 if (res == -ENOENT)
4160                         break;
4161                 if (res)
4162                         goto out_err;
4163
4164                 /* Survey without a channel doesn't make sense */
4165                 if (!survey.channel) {
4166                         res = -EINVAL;
4167                         goto out;
4168                 }
4169
4170                 chan = ieee80211_get_channel(&dev->wiphy,
4171                                              survey.channel->center_freq);
4172                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4173                         survey_idx++;
4174                         continue;
4175                 }
4176
4177                 if (nl80211_send_survey(skb,
4178                                 NETLINK_CB(cb->skb).pid,
4179                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4180                                 netdev,
4181                                 &survey) < 0)
4182                         goto out;
4183                 survey_idx++;
4184         }
4185
4186  out:
4187         cb->args[1] = survey_idx;
4188         res = skb->len;
4189  out_err:
4190         nl80211_finish_netdev_dump(dev);
4191         return res;
4192 }
4193
4194 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4195 {
4196         return auth_type <= NL80211_AUTHTYPE_MAX;
4197 }
4198
4199 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4200 {
4201         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4202                                   NL80211_WPA_VERSION_2));
4203 }
4204
4205 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4206 {
4207         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4208         struct net_device *dev = info->user_ptr[1];
4209         struct ieee80211_channel *chan;
4210         const u8 *bssid, *ssid, *ie = NULL;
4211         int err, ssid_len, ie_len = 0;
4212         enum nl80211_auth_type auth_type;
4213         struct key_parse key;
4214         bool local_state_change;
4215
4216         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4217                 return -EINVAL;
4218
4219         if (!info->attrs[NL80211_ATTR_MAC])
4220                 return -EINVAL;
4221
4222         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4223                 return -EINVAL;
4224
4225         if (!info->attrs[NL80211_ATTR_SSID])
4226                 return -EINVAL;
4227
4228         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4229                 return -EINVAL;
4230
4231         err = nl80211_parse_key(info, &key);
4232         if (err)
4233                 return err;
4234
4235         if (key.idx >= 0) {
4236                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4237                         return -EINVAL;
4238                 if (!key.p.key || !key.p.key_len)
4239                         return -EINVAL;
4240                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4241                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4242                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4243                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4244                         return -EINVAL;
4245                 if (key.idx > 4)
4246                         return -EINVAL;
4247         } else {
4248                 key.p.key_len = 0;
4249                 key.p.key = NULL;
4250         }
4251
4252         if (key.idx >= 0) {
4253                 int i;
4254                 bool ok = false;
4255                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4256                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4257                                 ok = true;
4258                                 break;
4259                         }
4260                 }
4261                 if (!ok)
4262                         return -EINVAL;
4263         }
4264
4265         if (!rdev->ops->auth)
4266                 return -EOPNOTSUPP;
4267
4268         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4269             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4270                 return -EOPNOTSUPP;
4271
4272         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4273         chan = ieee80211_get_channel(&rdev->wiphy,
4274                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4275         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4276                 return -EINVAL;
4277
4278         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4279         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4280
4281         if (info->attrs[NL80211_ATTR_IE]) {
4282                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4283                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4284         }
4285
4286         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4287         if (!nl80211_valid_auth_type(auth_type))
4288                 return -EINVAL;
4289
4290         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4291
4292         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4293                                   ssid, ssid_len, ie, ie_len,
4294                                   key.p.key, key.p.key_len, key.idx,
4295                                   local_state_change);
4296 }
4297
4298 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4299                                    struct genl_info *info,
4300                                    struct cfg80211_crypto_settings *settings,
4301                                    int cipher_limit)
4302 {
4303         memset(settings, 0, sizeof(*settings));
4304
4305         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4306
4307         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4308                 u16 proto;
4309                 proto = nla_get_u16(
4310                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4311                 settings->control_port_ethertype = cpu_to_be16(proto);
4312                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4313                     proto != ETH_P_PAE)
4314                         return -EINVAL;
4315                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4316                         settings->control_port_no_encrypt = true;
4317         } else
4318                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4319
4320         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4321                 void *data;
4322                 int len, i;
4323
4324                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4325                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4326                 settings->n_ciphers_pairwise = len / sizeof(u32);
4327
4328                 if (len % sizeof(u32))
4329                         return -EINVAL;
4330
4331                 if (settings->n_ciphers_pairwise > cipher_limit)
4332                         return -EINVAL;
4333
4334                 memcpy(settings->ciphers_pairwise, data, len);
4335
4336                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4337                         if (!cfg80211_supported_cipher_suite(
4338                                         &rdev->wiphy,
4339                                         settings->ciphers_pairwise[i]))
4340                                 return -EINVAL;
4341         }
4342
4343         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4344                 settings->cipher_group =
4345                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4346                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4347                                                      settings->cipher_group))
4348                         return -EINVAL;
4349         }
4350
4351         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4352                 settings->wpa_versions =
4353                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4354                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4355                         return -EINVAL;
4356         }
4357
4358         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4359                 void *data;
4360                 int len;
4361
4362                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4363                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4364                 settings->n_akm_suites = len / sizeof(u32);
4365
4366                 if (len % sizeof(u32))
4367                         return -EINVAL;
4368
4369                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4370                         return -EINVAL;
4371
4372                 memcpy(settings->akm_suites, data, len);
4373         }
4374
4375         return 0;
4376 }
4377
4378 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4379 {
4380         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4381         struct net_device *dev = info->user_ptr[1];
4382         struct cfg80211_crypto_settings crypto;
4383         struct ieee80211_channel *chan;
4384         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4385         int err, ssid_len, ie_len = 0;
4386         bool use_mfp = false;
4387
4388         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4389                 return -EINVAL;
4390
4391         if (!info->attrs[NL80211_ATTR_MAC] ||
4392             !info->attrs[NL80211_ATTR_SSID] ||
4393             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4394                 return -EINVAL;
4395
4396         if (!rdev->ops->assoc)
4397                 return -EOPNOTSUPP;
4398
4399         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4400             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4401                 return -EOPNOTSUPP;
4402
4403         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4404
4405         chan = ieee80211_get_channel(&rdev->wiphy,
4406                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4407         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4408                 return -EINVAL;
4409
4410         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4411         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4412
4413         if (info->attrs[NL80211_ATTR_IE]) {
4414                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4415                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4416         }
4417
4418         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4419                 enum nl80211_mfp mfp =
4420                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4421                 if (mfp == NL80211_MFP_REQUIRED)
4422                         use_mfp = true;
4423                 else if (mfp != NL80211_MFP_NO)
4424                         return -EINVAL;
4425         }
4426
4427         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4428                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4429
4430         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4431         if (!err)
4432                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4433                                           ssid, ssid_len, ie, ie_len, use_mfp,
4434                                           &crypto);
4435
4436         return err;
4437 }
4438
4439 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4440 {
4441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4442         struct net_device *dev = info->user_ptr[1];
4443         const u8 *ie = NULL, *bssid;
4444         int ie_len = 0;
4445         u16 reason_code;
4446         bool local_state_change;
4447
4448         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4449                 return -EINVAL;
4450
4451         if (!info->attrs[NL80211_ATTR_MAC])
4452                 return -EINVAL;
4453
4454         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4455                 return -EINVAL;
4456
4457         if (!rdev->ops->deauth)
4458                 return -EOPNOTSUPP;
4459
4460         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4461             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4462                 return -EOPNOTSUPP;
4463
4464         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4465
4466         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4467         if (reason_code == 0) {
4468                 /* Reason Code 0 is reserved */
4469                 return -EINVAL;
4470         }
4471
4472         if (info->attrs[NL80211_ATTR_IE]) {
4473                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4474                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4475         }
4476
4477         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4478
4479         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4480                                     local_state_change);
4481 }
4482
4483 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4484 {
4485         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4486         struct net_device *dev = info->user_ptr[1];
4487         const u8 *ie = NULL, *bssid;
4488         int ie_len = 0;
4489         u16 reason_code;
4490         bool local_state_change;
4491
4492         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4493                 return -EINVAL;
4494
4495         if (!info->attrs[NL80211_ATTR_MAC])
4496                 return -EINVAL;
4497
4498         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4499                 return -EINVAL;
4500
4501         if (!rdev->ops->disassoc)
4502                 return -EOPNOTSUPP;
4503
4504         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4505             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4506                 return -EOPNOTSUPP;
4507
4508         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4509
4510         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4511         if (reason_code == 0) {
4512                 /* Reason Code 0 is reserved */
4513                 return -EINVAL;
4514         }
4515
4516         if (info->attrs[NL80211_ATTR_IE]) {
4517                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4518                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4519         }
4520
4521         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4522
4523         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4524                                       local_state_change);
4525 }
4526
4527 static bool
4528 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4529                          int mcast_rate[IEEE80211_NUM_BANDS],
4530                          int rateval)
4531 {
4532         struct wiphy *wiphy = &rdev->wiphy;
4533         bool found = false;
4534         int band, i;
4535
4536         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4537                 struct ieee80211_supported_band *sband;
4538
4539                 sband = wiphy->bands[band];
4540                 if (!sband)
4541                         continue;
4542
4543                 for (i = 0; i < sband->n_bitrates; i++) {
4544                         if (sband->bitrates[i].bitrate == rateval) {
4545                                 mcast_rate[band] = i + 1;
4546                                 found = true;
4547                                 break;
4548                         }
4549                 }
4550         }
4551
4552         return found;
4553 }
4554
4555 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4556 {
4557         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4558         struct net_device *dev = info->user_ptr[1];
4559         struct cfg80211_ibss_params ibss;
4560         struct wiphy *wiphy;
4561         struct cfg80211_cached_keys *connkeys = NULL;
4562         int err;
4563
4564         memset(&ibss, 0, sizeof(ibss));
4565
4566         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4567                 return -EINVAL;
4568
4569         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4570             !info->attrs[NL80211_ATTR_SSID] ||
4571             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4572                 return -EINVAL;
4573
4574         ibss.beacon_interval = 100;
4575
4576         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4577                 ibss.beacon_interval =
4578                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4579                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4580                         return -EINVAL;
4581         }
4582
4583         if (!rdev->ops->join_ibss)
4584                 return -EOPNOTSUPP;
4585
4586         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4587                 return -EOPNOTSUPP;
4588
4589         wiphy = &rdev->wiphy;
4590
4591         if (info->attrs[NL80211_ATTR_MAC]) {
4592                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4593
4594                 if (!is_valid_ether_addr(ibss.bssid))
4595                         return -EINVAL;
4596         }
4597         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4598         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4599
4600         if (info->attrs[NL80211_ATTR_IE]) {
4601                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4602                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4603         }
4604
4605         ibss.channel = ieee80211_get_channel(wiphy,
4606                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4607         if (!ibss.channel ||
4608             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4609             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4610                 return -EINVAL;
4611
4612         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4613         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4614
4615         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4616                 u8 *rates =
4617                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4618                 int n_rates =
4619                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4620                 struct ieee80211_supported_band *sband =
4621                         wiphy->bands[ibss.channel->band];
4622                 int err;
4623
4624                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4625                                              &ibss.basic_rates);
4626                 if (err)
4627                         return err;
4628         }
4629
4630         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4631             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4632                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4633                 return -EINVAL;
4634
4635         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4636                 connkeys = nl80211_parse_connkeys(rdev,
4637                                         info->attrs[NL80211_ATTR_KEYS]);
4638                 if (IS_ERR(connkeys))
4639                         return PTR_ERR(connkeys);
4640         }
4641
4642         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4643         if (err)
4644                 kfree(connkeys);
4645         return err;
4646 }
4647
4648 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4649 {
4650         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4651         struct net_device *dev = info->user_ptr[1];
4652
4653         if (!rdev->ops->leave_ibss)
4654                 return -EOPNOTSUPP;
4655
4656         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4657                 return -EOPNOTSUPP;
4658
4659         return cfg80211_leave_ibss(rdev, dev, false);
4660 }
4661
4662 #ifdef CONFIG_NL80211_TESTMODE
4663 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4664         .name = "testmode",
4665 };
4666
4667 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4668 {
4669         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4670         int err;
4671
4672         if (!info->attrs[NL80211_ATTR_TESTDATA])
4673                 return -EINVAL;
4674
4675         err = -EOPNOTSUPP;
4676         if (rdev->ops->testmode_cmd) {
4677                 rdev->testmode_info = info;
4678                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4679                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4680                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4681                 rdev->testmode_info = NULL;
4682         }
4683
4684         return err;
4685 }
4686
4687 static int nl80211_testmode_dump(struct sk_buff *skb,
4688                                  struct netlink_callback *cb)
4689 {
4690         struct cfg80211_registered_device *dev;
4691         int err;
4692         long phy_idx;
4693         void *data = NULL;
4694         int data_len = 0;
4695
4696         if (cb->args[0]) {
4697                 /*
4698                  * 0 is a valid index, but not valid for args[0],
4699                  * so we need to offset by 1.
4700                  */
4701                 phy_idx = cb->args[0] - 1;
4702         } else {
4703                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4704                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4705                                   nl80211_policy);
4706                 if (err)
4707                         return err;
4708                 if (!nl80211_fam.attrbuf[NL80211_ATTR_WIPHY])
4709                         return -EINVAL;
4710                 phy_idx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4711                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4712                         cb->args[1] =
4713                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4714         }
4715
4716         if (cb->args[1]) {
4717                 data = nla_data((void *)cb->args[1]);
4718                 data_len = nla_len((void *)cb->args[1]);
4719         }
4720
4721         mutex_lock(&cfg80211_mutex);
4722         dev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4723         if (!dev) {
4724                 mutex_unlock(&cfg80211_mutex);
4725                 return -ENOENT;
4726         }
4727         cfg80211_lock_rdev(dev);
4728         mutex_unlock(&cfg80211_mutex);
4729
4730         if (!dev->ops->testmode_dump) {
4731                 err = -EOPNOTSUPP;
4732                 goto out_err;
4733         }
4734
4735         while (1) {
4736                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4737                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4738                                            NL80211_CMD_TESTMODE);
4739                 struct nlattr *tmdata;
4740
4741                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, dev->wiphy_idx) < 0) {
4742                         genlmsg_cancel(skb, hdr);
4743                         break;
4744                 }
4745
4746                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4747                 if (!tmdata) {
4748                         genlmsg_cancel(skb, hdr);
4749                         break;
4750                 }
4751                 err = dev->ops->testmode_dump(&dev->wiphy, skb, cb,
4752                                               data, data_len);
4753                 nla_nest_end(skb, tmdata);
4754
4755                 if (err == -ENOBUFS || err == -ENOENT) {
4756                         genlmsg_cancel(skb, hdr);
4757                         break;
4758                 } else if (err) {
4759                         genlmsg_cancel(skb, hdr);
4760                         goto out_err;
4761                 }
4762
4763                 genlmsg_end(skb, hdr);
4764         }
4765
4766         err = skb->len;
4767         /* see above */
4768         cb->args[0] = phy_idx + 1;
4769  out_err:
4770         cfg80211_unlock_rdev(dev);
4771         return err;
4772 }
4773
4774 static struct sk_buff *
4775 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4776                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4777 {
4778         struct sk_buff *skb;
4779         void *hdr;
4780         struct nlattr *data;
4781
4782         skb = nlmsg_new(approxlen + 100, gfp);
4783         if (!skb)
4784                 return NULL;
4785
4786         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4787         if (!hdr) {
4788                 kfree_skb(skb);
4789                 return NULL;
4790         }
4791
4792         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4793         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4794
4795         ((void **)skb->cb)[0] = rdev;
4796         ((void **)skb->cb)[1] = hdr;
4797         ((void **)skb->cb)[2] = data;
4798
4799         return skb;
4800
4801  nla_put_failure:
4802         kfree_skb(skb);
4803         return NULL;
4804 }
4805
4806 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4807                                                   int approxlen)
4808 {
4809         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4810
4811         if (WARN_ON(!rdev->testmode_info))
4812                 return NULL;
4813
4814         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4815                                 rdev->testmode_info->snd_pid,
4816                                 rdev->testmode_info->snd_seq,
4817                                 GFP_KERNEL);
4818 }
4819 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4820
4821 int cfg80211_testmode_reply(struct sk_buff *skb)
4822 {
4823         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4824         void *hdr = ((void **)skb->cb)[1];
4825         struct nlattr *data = ((void **)skb->cb)[2];
4826
4827         if (WARN_ON(!rdev->testmode_info)) {
4828                 kfree_skb(skb);
4829                 return -EINVAL;
4830         }
4831
4832         nla_nest_end(skb, data);
4833         genlmsg_end(skb, hdr);
4834         return genlmsg_reply(skb, rdev->testmode_info);
4835 }
4836 EXPORT_SYMBOL(cfg80211_testmode_reply);
4837
4838 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4839                                                   int approxlen, gfp_t gfp)
4840 {
4841         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4842
4843         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4844 }
4845 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4846
4847 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4848 {
4849         void *hdr = ((void **)skb->cb)[1];
4850         struct nlattr *data = ((void **)skb->cb)[2];
4851
4852         nla_nest_end(skb, data);
4853         genlmsg_end(skb, hdr);
4854         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4855 }
4856 EXPORT_SYMBOL(cfg80211_testmode_event);
4857 #endif
4858
4859 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4860 {
4861         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4862         struct net_device *dev = info->user_ptr[1];
4863         struct cfg80211_connect_params connect;
4864         struct wiphy *wiphy;
4865         struct cfg80211_cached_keys *connkeys = NULL;
4866         int err;
4867
4868         memset(&connect, 0, sizeof(connect));
4869
4870         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4871                 return -EINVAL;
4872
4873         if (!info->attrs[NL80211_ATTR_SSID] ||
4874             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4875                 return -EINVAL;
4876
4877         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4878                 connect.auth_type =
4879                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4880                 if (!nl80211_valid_auth_type(connect.auth_type))
4881                         return -EINVAL;
4882         } else
4883                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4884
4885         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4886
4887         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4888                                       NL80211_MAX_NR_CIPHER_SUITES);
4889         if (err)
4890                 return err;
4891
4892         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4893             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4894                 return -EOPNOTSUPP;
4895
4896         wiphy = &rdev->wiphy;
4897
4898         if (info->attrs[NL80211_ATTR_MAC])
4899                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4900         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4901         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4902
4903         if (info->attrs[NL80211_ATTR_IE]) {
4904                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4905                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4906         }
4907
4908         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4909                 connect.channel =
4910                         ieee80211_get_channel(wiphy,
4911                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4912                 if (!connect.channel ||
4913                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4914                         return -EINVAL;
4915         }
4916
4917         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4918                 connkeys = nl80211_parse_connkeys(rdev,
4919                                         info->attrs[NL80211_ATTR_KEYS]);
4920                 if (IS_ERR(connkeys))
4921                         return PTR_ERR(connkeys);
4922         }
4923
4924         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4925         if (err)
4926                 kfree(connkeys);
4927         return err;
4928 }
4929
4930 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4931 {
4932         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4933         struct net_device *dev = info->user_ptr[1];
4934         u16 reason;
4935
4936         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4937                 reason = WLAN_REASON_DEAUTH_LEAVING;
4938         else
4939                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4940
4941         if (reason == 0)
4942                 return -EINVAL;
4943
4944         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4945             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4946                 return -EOPNOTSUPP;
4947
4948         return cfg80211_disconnect(rdev, dev, reason, true);
4949 }
4950
4951 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4952 {
4953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4954         struct net *net;
4955         int err;
4956         u32 pid;
4957
4958         if (!info->attrs[NL80211_ATTR_PID])
4959                 return -EINVAL;
4960
4961         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4962
4963         net = get_net_ns_by_pid(pid);
4964         if (IS_ERR(net))
4965                 return PTR_ERR(net);
4966
4967         err = 0;
4968
4969         /* check if anything to do */
4970         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4971                 err = cfg80211_switch_netns(rdev, net);
4972
4973         put_net(net);
4974         return err;
4975 }
4976
4977 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4978 {
4979         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4980         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4981                         struct cfg80211_pmksa *pmksa) = NULL;
4982         struct net_device *dev = info->user_ptr[1];
4983         struct cfg80211_pmksa pmksa;
4984
4985         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4986
4987         if (!info->attrs[NL80211_ATTR_MAC])
4988                 return -EINVAL;
4989
4990         if (!info->attrs[NL80211_ATTR_PMKID])
4991                 return -EINVAL;
4992
4993         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4994         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4995
4996         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4997             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4998                 return -EOPNOTSUPP;
4999
5000         switch (info->genlhdr->cmd) {
5001         case NL80211_CMD_SET_PMKSA:
5002                 rdev_ops = rdev->ops->set_pmksa;
5003                 break;
5004         case NL80211_CMD_DEL_PMKSA:
5005                 rdev_ops = rdev->ops->del_pmksa;
5006                 break;
5007         default:
5008                 WARN_ON(1);
5009                 break;
5010         }
5011
5012         if (!rdev_ops)
5013                 return -EOPNOTSUPP;
5014
5015         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5016 }
5017
5018 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5019 {
5020         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5021         struct net_device *dev = info->user_ptr[1];
5022
5023         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5024             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5025                 return -EOPNOTSUPP;
5026
5027         if (!rdev->ops->flush_pmksa)
5028                 return -EOPNOTSUPP;
5029
5030         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5031 }
5032
5033 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5034 {
5035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5036         struct net_device *dev = info->user_ptr[1];
5037         u8 action_code, dialog_token;
5038         u16 status_code;
5039         u8 *peer;
5040
5041         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5042             !rdev->ops->tdls_mgmt)
5043                 return -EOPNOTSUPP;
5044
5045         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5046             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5047             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5048             !info->attrs[NL80211_ATTR_IE] ||
5049             !info->attrs[NL80211_ATTR_MAC])
5050                 return -EINVAL;
5051
5052         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5053         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5054         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5055         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5056
5057         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5058                                     dialog_token, status_code,
5059                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5060                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5061 }
5062
5063 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5064 {
5065         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5066         struct net_device *dev = info->user_ptr[1];
5067         enum nl80211_tdls_operation operation;
5068         u8 *peer;
5069
5070         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5071             !rdev->ops->tdls_oper)
5072                 return -EOPNOTSUPP;
5073
5074         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5075             !info->attrs[NL80211_ATTR_MAC])
5076                 return -EINVAL;
5077
5078         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5079         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5080
5081         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5082 }
5083
5084 static int nl80211_remain_on_channel(struct sk_buff *skb,
5085                                      struct genl_info *info)
5086 {
5087         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5088         struct net_device *dev = info->user_ptr[1];
5089         struct ieee80211_channel *chan;
5090         struct sk_buff *msg;
5091         void *hdr;
5092         u64 cookie;
5093         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5094         u32 freq, duration;
5095         int err;
5096
5097         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5098             !info->attrs[NL80211_ATTR_DURATION])
5099                 return -EINVAL;
5100
5101         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5102
5103         /*
5104          * We should be on that channel for at least one jiffie,
5105          * and more than 5 seconds seems excessive.
5106          */
5107         if (!duration || !msecs_to_jiffies(duration) ||
5108             duration > rdev->wiphy.max_remain_on_channel_duration)
5109                 return -EINVAL;
5110
5111         if (!rdev->ops->remain_on_channel)
5112                 return -EOPNOTSUPP;
5113
5114         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5115                 channel_type = nla_get_u32(
5116                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5117                 if (channel_type != NL80211_CHAN_NO_HT &&
5118                     channel_type != NL80211_CHAN_HT20 &&
5119                     channel_type != NL80211_CHAN_HT40PLUS &&
5120                     channel_type != NL80211_CHAN_HT40MINUS)
5121                         return -EINVAL;
5122         }
5123
5124         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5125         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5126         if (chan == NULL)
5127                 return -EINVAL;
5128
5129         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5130         if (!msg)
5131                 return -ENOMEM;
5132
5133         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5134                              NL80211_CMD_REMAIN_ON_CHANNEL);
5135
5136         if (IS_ERR(hdr)) {
5137                 err = PTR_ERR(hdr);
5138                 goto free_msg;
5139         }
5140
5141         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5142                                            channel_type, duration, &cookie);
5143
5144         if (err)
5145                 goto free_msg;
5146
5147         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5148
5149         genlmsg_end(msg, hdr);
5150
5151         return genlmsg_reply(msg, info);
5152
5153  nla_put_failure:
5154         err = -ENOBUFS;
5155  free_msg:
5156         nlmsg_free(msg);
5157         return err;
5158 }
5159
5160 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5161                                             struct genl_info *info)
5162 {
5163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5164         struct net_device *dev = info->user_ptr[1];
5165         u64 cookie;
5166
5167         if (!info->attrs[NL80211_ATTR_COOKIE])
5168                 return -EINVAL;
5169
5170         if (!rdev->ops->cancel_remain_on_channel)
5171                 return -EOPNOTSUPP;
5172
5173         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5174
5175         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5176 }
5177
5178 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5179                            u8 *rates, u8 rates_len)
5180 {
5181         u8 i;
5182         u32 mask = 0;
5183
5184         for (i = 0; i < rates_len; i++) {
5185                 int rate = (rates[i] & 0x7f) * 5;
5186                 int ridx;
5187                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5188                         struct ieee80211_rate *srate =
5189                                 &sband->bitrates[ridx];
5190                         if (rate == srate->bitrate) {
5191                                 mask |= 1 << ridx;
5192                                 break;
5193                         }
5194                 }
5195                 if (ridx == sband->n_bitrates)
5196                         return 0; /* rate not found */
5197         }
5198
5199         return mask;
5200 }
5201
5202 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5203         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5204                                     .len = NL80211_MAX_SUPP_RATES },
5205 };
5206
5207 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5208                                        struct genl_info *info)
5209 {
5210         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5211         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5212         struct cfg80211_bitrate_mask mask;
5213         int rem, i;
5214         struct net_device *dev = info->user_ptr[1];
5215         struct nlattr *tx_rates;
5216         struct ieee80211_supported_band *sband;
5217
5218         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5219                 return -EINVAL;
5220
5221         if (!rdev->ops->set_bitrate_mask)
5222                 return -EOPNOTSUPP;
5223
5224         memset(&mask, 0, sizeof(mask));
5225         /* Default to all rates enabled */
5226         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5227                 sband = rdev->wiphy.bands[i];
5228                 mask.control[i].legacy =
5229                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5230         }
5231
5232         /*
5233          * The nested attribute uses enum nl80211_band as the index. This maps
5234          * directly to the enum ieee80211_band values used in cfg80211.
5235          */
5236         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5237         {
5238                 enum ieee80211_band band = nla_type(tx_rates);
5239                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5240                         return -EINVAL;
5241                 sband = rdev->wiphy.bands[band];
5242                 if (sband == NULL)
5243                         return -EINVAL;
5244                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5245                           nla_len(tx_rates), nl80211_txattr_policy);
5246                 if (tb[NL80211_TXRATE_LEGACY]) {
5247                         mask.control[band].legacy = rateset_to_mask(
5248                                 sband,
5249                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5250                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5251                         if (mask.control[band].legacy == 0)
5252                                 return -EINVAL;
5253                 }
5254         }
5255
5256         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5257 }
5258
5259 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5260 {
5261         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5262         struct net_device *dev = info->user_ptr[1];
5263         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5264
5265         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5266                 return -EINVAL;
5267
5268         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5269                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5270
5271         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5272             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5273             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5274             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5275             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5276             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5277             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5278                 return -EOPNOTSUPP;
5279
5280         /* not much point in registering if we can't reply */
5281         if (!rdev->ops->mgmt_tx)
5282                 return -EOPNOTSUPP;
5283
5284         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5285                         frame_type,
5286                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5287                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5288 }
5289
5290 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5291 {
5292         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5293         struct net_device *dev = info->user_ptr[1];
5294         struct ieee80211_channel *chan;
5295         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5296         bool channel_type_valid = false;
5297         u32 freq;
5298         int err;
5299         void *hdr = NULL;
5300         u64 cookie;
5301         struct sk_buff *msg = NULL;
5302         unsigned int wait = 0;
5303         bool offchan, no_cck, dont_wait_for_ack;
5304
5305         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5306
5307         if (!info->attrs[NL80211_ATTR_FRAME] ||
5308             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5309                 return -EINVAL;
5310
5311         if (!rdev->ops->mgmt_tx)
5312                 return -EOPNOTSUPP;
5313
5314         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5315             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5316             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5317             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5318             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5319             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5320             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5321                 return -EOPNOTSUPP;
5322
5323         if (info->attrs[NL80211_ATTR_DURATION]) {
5324                 if (!rdev->ops->mgmt_tx_cancel_wait)
5325                         return -EINVAL;
5326                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5327         }
5328
5329         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5330                 channel_type = nla_get_u32(
5331                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5332                 if (channel_type != NL80211_CHAN_NO_HT &&
5333                     channel_type != NL80211_CHAN_HT20 &&
5334                     channel_type != NL80211_CHAN_HT40PLUS &&
5335                     channel_type != NL80211_CHAN_HT40MINUS)
5336                         return -EINVAL;
5337                 channel_type_valid = true;
5338         }
5339
5340         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5341
5342         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5343
5344         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5345         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5346         if (chan == NULL)
5347                 return -EINVAL;
5348
5349         if (!dont_wait_for_ack) {
5350                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5351                 if (!msg)
5352                         return -ENOMEM;
5353
5354                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5355                                      NL80211_CMD_FRAME);
5356
5357                 if (IS_ERR(hdr)) {
5358                         err = PTR_ERR(hdr);
5359                         goto free_msg;
5360                 }
5361         }
5362
5363         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5364                                     channel_type_valid, wait,
5365                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5366                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5367                                     no_cck, dont_wait_for_ack, &cookie);
5368         if (err)
5369                 goto free_msg;
5370
5371         if (msg) {
5372                 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5373
5374                 genlmsg_end(msg, hdr);
5375                 return genlmsg_reply(msg, info);
5376         }
5377
5378         return 0;
5379
5380  nla_put_failure:
5381         err = -ENOBUFS;
5382  free_msg:
5383         nlmsg_free(msg);
5384         return err;
5385 }
5386
5387 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5388 {
5389         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5390         struct net_device *dev = info->user_ptr[1];
5391         u64 cookie;
5392
5393         if (!info->attrs[NL80211_ATTR_COOKIE])
5394                 return -EINVAL;
5395
5396         if (!rdev->ops->mgmt_tx_cancel_wait)
5397                 return -EOPNOTSUPP;
5398
5399         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5400             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5401             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5402             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5403             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5404             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5405                 return -EOPNOTSUPP;
5406
5407         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5408
5409         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5410 }
5411
5412 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5413 {
5414         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5415         struct wireless_dev *wdev;
5416         struct net_device *dev = info->user_ptr[1];
5417         u8 ps_state;
5418         bool state;
5419         int err;
5420
5421         if (!info->attrs[NL80211_ATTR_PS_STATE])
5422                 return -EINVAL;
5423
5424         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5425
5426         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5427                 return -EINVAL;
5428
5429         wdev = dev->ieee80211_ptr;
5430
5431         if (!rdev->ops->set_power_mgmt)
5432                 return -EOPNOTSUPP;
5433
5434         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5435
5436         if (state == wdev->ps)
5437                 return 0;
5438
5439         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5440                                         wdev->ps_timeout);
5441         if (!err)
5442                 wdev->ps = state;
5443         return err;
5444 }
5445
5446 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5447 {
5448         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5449         enum nl80211_ps_state ps_state;
5450         struct wireless_dev *wdev;
5451         struct net_device *dev = info->user_ptr[1];
5452         struct sk_buff *msg;
5453         void *hdr;
5454         int err;
5455
5456         wdev = dev->ieee80211_ptr;
5457
5458         if (!rdev->ops->set_power_mgmt)
5459                 return -EOPNOTSUPP;
5460
5461         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5462         if (!msg)
5463                 return -ENOMEM;
5464
5465         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5466                              NL80211_CMD_GET_POWER_SAVE);
5467         if (!hdr) {
5468                 err = -ENOBUFS;
5469                 goto free_msg;
5470         }
5471
5472         if (wdev->ps)
5473                 ps_state = NL80211_PS_ENABLED;
5474         else
5475                 ps_state = NL80211_PS_DISABLED;
5476
5477         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5478
5479         genlmsg_end(msg, hdr);
5480         return genlmsg_reply(msg, info);
5481
5482  nla_put_failure:
5483         err = -ENOBUFS;
5484  free_msg:
5485         nlmsg_free(msg);
5486         return err;
5487 }
5488
5489 static struct nla_policy
5490 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5491         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5492         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5493         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5494 };
5495
5496 static int nl80211_set_cqm_rssi(struct genl_info *info,
5497                                 s32 threshold, u32 hysteresis)
5498 {
5499         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5500         struct wireless_dev *wdev;
5501         struct net_device *dev = info->user_ptr[1];
5502
5503         if (threshold > 0)
5504                 return -EINVAL;
5505
5506         wdev = dev->ieee80211_ptr;
5507
5508         if (!rdev->ops->set_cqm_rssi_config)
5509                 return -EOPNOTSUPP;
5510
5511         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5512             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5513                 return -EOPNOTSUPP;
5514
5515         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5516                                               threshold, hysteresis);
5517 }
5518
5519 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5520 {
5521         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5522         struct nlattr *cqm;
5523         int err;
5524
5525         cqm = info->attrs[NL80211_ATTR_CQM];
5526         if (!cqm) {
5527                 err = -EINVAL;
5528                 goto out;
5529         }
5530
5531         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5532                                nl80211_attr_cqm_policy);
5533         if (err)
5534                 goto out;
5535
5536         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5537             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5538                 s32 threshold;
5539                 u32 hysteresis;
5540                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5541                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5542                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5543         } else
5544                 err = -EINVAL;
5545
5546 out:
5547         return err;
5548 }
5549
5550 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5551 {
5552         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5553         struct net_device *dev = info->user_ptr[1];
5554         struct mesh_config cfg;
5555         struct mesh_setup setup;
5556         int err;
5557
5558         /* start with default */
5559         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5560         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5561
5562         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5563                 /* and parse parameters if given */
5564                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5565                 if (err)
5566                         return err;
5567         }
5568
5569         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5570             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5571                 return -EINVAL;
5572
5573         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5574         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5575
5576         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5577                 /* parse additional setup parameters if given */
5578                 err = nl80211_parse_mesh_setup(info, &setup);
5579                 if (err)
5580                         return err;
5581         }
5582
5583         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5584 }
5585
5586 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5587 {
5588         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5589         struct net_device *dev = info->user_ptr[1];
5590
5591         return cfg80211_leave_mesh(rdev, dev);
5592 }
5593
5594 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5595 {
5596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5597         struct sk_buff *msg;
5598         void *hdr;
5599
5600         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5601                 return -EOPNOTSUPP;
5602
5603         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5604         if (!msg)
5605                 return -ENOMEM;
5606
5607         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5608                              NL80211_CMD_GET_WOWLAN);
5609         if (!hdr)
5610                 goto nla_put_failure;
5611
5612         if (rdev->wowlan) {
5613                 struct nlattr *nl_wowlan;
5614
5615                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5616                 if (!nl_wowlan)
5617                         goto nla_put_failure;
5618
5619                 if (rdev->wowlan->any)
5620                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5621                 if (rdev->wowlan->disconnect)
5622                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5623                 if (rdev->wowlan->magic_pkt)
5624                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5625                 if (rdev->wowlan->gtk_rekey_failure)
5626                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5627                 if (rdev->wowlan->eap_identity_req)
5628                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
5629                 if (rdev->wowlan->four_way_handshake)
5630                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
5631                 if (rdev->wowlan->rfkill_release)
5632                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
5633                 if (rdev->wowlan->n_patterns) {
5634                         struct nlattr *nl_pats, *nl_pat;
5635                         int i, pat_len;
5636
5637                         nl_pats = nla_nest_start(msg,
5638                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5639                         if (!nl_pats)
5640                                 goto nla_put_failure;
5641
5642                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5643                                 nl_pat = nla_nest_start(msg, i + 1);
5644                                 if (!nl_pat)
5645                                         goto nla_put_failure;
5646                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5647                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5648                                         DIV_ROUND_UP(pat_len, 8),
5649                                         rdev->wowlan->patterns[i].mask);
5650                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5651                                         pat_len,
5652                                         rdev->wowlan->patterns[i].pattern);
5653                                 nla_nest_end(msg, nl_pat);
5654                         }
5655                         nla_nest_end(msg, nl_pats);
5656                 }
5657
5658                 nla_nest_end(msg, nl_wowlan);
5659         }
5660
5661         genlmsg_end(msg, hdr);
5662         return genlmsg_reply(msg, info);
5663
5664 nla_put_failure:
5665         nlmsg_free(msg);
5666         return -ENOBUFS;
5667 }
5668
5669 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5670 {
5671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5672         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5673         struct cfg80211_wowlan no_triggers = {};
5674         struct cfg80211_wowlan new_triggers = {};
5675         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5676         int err, i;
5677
5678         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5679                 return -EOPNOTSUPP;
5680
5681         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5682                 goto no_triggers;
5683
5684         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5685                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5686                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5687                         nl80211_wowlan_policy);
5688         if (err)
5689                 return err;
5690
5691         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
5692                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
5693                         return -EINVAL;
5694                 new_triggers.any = true;
5695         }
5696
5697         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
5698                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
5699                         return -EINVAL;
5700                 new_triggers.disconnect = true;
5701         }
5702
5703         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
5704                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
5705                         return -EINVAL;
5706                 new_triggers.magic_pkt = true;
5707         }
5708
5709         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
5710                 return -EINVAL;
5711
5712         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
5713                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
5714                         return -EINVAL;
5715                 new_triggers.gtk_rekey_failure = true;
5716         }
5717
5718         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
5719                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
5720                         return -EINVAL;
5721                 new_triggers.eap_identity_req = true;
5722         }
5723
5724         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
5725                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
5726                         return -EINVAL;
5727                 new_triggers.four_way_handshake = true;
5728         }
5729
5730         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
5731                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
5732                         return -EINVAL;
5733                 new_triggers.rfkill_release = true;
5734         }
5735
5736         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
5737                 struct nlattr *pat;
5738                 int n_patterns = 0;
5739                 int rem, pat_len, mask_len;
5740                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
5741
5742                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5743                                     rem)
5744                         n_patterns++;
5745                 if (n_patterns > wowlan->n_patterns)
5746                         return -EINVAL;
5747
5748                 new_triggers.patterns = kcalloc(n_patterns,
5749                                                 sizeof(new_triggers.patterns[0]),
5750                                                 GFP_KERNEL);
5751                 if (!new_triggers.patterns)
5752                         return -ENOMEM;
5753
5754                 new_triggers.n_patterns = n_patterns;
5755                 i = 0;
5756
5757                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5758                                     rem) {
5759                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
5760                                   nla_data(pat), nla_len(pat), NULL);
5761                         err = -EINVAL;
5762                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
5763                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
5764                                 goto error;
5765                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
5766                         mask_len = DIV_ROUND_UP(pat_len, 8);
5767                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
5768                             mask_len)
5769                                 goto error;
5770                         if (pat_len > wowlan->pattern_max_len ||
5771                             pat_len < wowlan->pattern_min_len)
5772                                 goto error;
5773
5774                         new_triggers.patterns[i].mask =
5775                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
5776                         if (!new_triggers.patterns[i].mask) {
5777                                 err = -ENOMEM;
5778                                 goto error;
5779                         }
5780                         new_triggers.patterns[i].pattern =
5781                                 new_triggers.patterns[i].mask + mask_len;
5782                         memcpy(new_triggers.patterns[i].mask,
5783                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
5784                                mask_len);
5785                         new_triggers.patterns[i].pattern_len = pat_len;
5786                         memcpy(new_triggers.patterns[i].pattern,
5787                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
5788                                pat_len);
5789                         i++;
5790                 }
5791         }
5792
5793         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
5794                 struct cfg80211_wowlan *ntrig;
5795                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
5796                                 GFP_KERNEL);
5797                 if (!ntrig) {
5798                         err = -ENOMEM;
5799                         goto error;
5800                 }
5801                 cfg80211_rdev_free_wowlan(rdev);
5802                 rdev->wowlan = ntrig;
5803         } else {
5804  no_triggers:
5805                 cfg80211_rdev_free_wowlan(rdev);
5806                 rdev->wowlan = NULL;
5807         }
5808
5809         return 0;
5810  error:
5811         for (i = 0; i < new_triggers.n_patterns; i++)
5812                 kfree(new_triggers.patterns[i].mask);
5813         kfree(new_triggers.patterns);
5814         return err;
5815 }
5816
5817 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
5818 {
5819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5820         struct net_device *dev = info->user_ptr[1];
5821         struct wireless_dev *wdev = dev->ieee80211_ptr;
5822         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
5823         struct cfg80211_gtk_rekey_data rekey_data;
5824         int err;
5825
5826         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
5827                 return -EINVAL;
5828
5829         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
5830                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
5831                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
5832                         nl80211_rekey_policy);
5833         if (err)
5834                 return err;
5835
5836         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
5837                 return -ERANGE;
5838         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
5839                 return -ERANGE;
5840         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
5841                 return -ERANGE;
5842
5843         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
5844                NL80211_KEK_LEN);
5845         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
5846                NL80211_KCK_LEN);
5847         memcpy(rekey_data.replay_ctr,
5848                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
5849                NL80211_REPLAY_CTR_LEN);
5850
5851         wdev_lock(wdev);
5852         if (!wdev->current_bss) {
5853                 err = -ENOTCONN;
5854                 goto out;
5855         }
5856
5857         if (!rdev->ops->set_rekey_data) {
5858                 err = -EOPNOTSUPP;
5859                 goto out;
5860         }
5861
5862         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
5863  out:
5864         wdev_unlock(wdev);
5865         return err;
5866 }
5867
5868 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
5869                                              struct genl_info *info)
5870 {
5871         struct net_device *dev = info->user_ptr[1];
5872         struct wireless_dev *wdev = dev->ieee80211_ptr;
5873
5874         if (wdev->iftype != NL80211_IFTYPE_AP &&
5875             wdev->iftype != NL80211_IFTYPE_P2P_GO)
5876                 return -EINVAL;
5877
5878         if (wdev->ap_unexpected_nlpid)
5879                 return -EBUSY;
5880
5881         wdev->ap_unexpected_nlpid = info->snd_pid;
5882         return 0;
5883 }
5884
5885 static int nl80211_probe_client(struct sk_buff *skb,
5886                                 struct genl_info *info)
5887 {
5888         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5889         struct net_device *dev = info->user_ptr[1];
5890         struct wireless_dev *wdev = dev->ieee80211_ptr;
5891         struct sk_buff *msg;
5892         void *hdr;
5893         const u8 *addr;
5894         u64 cookie;
5895         int err;
5896
5897         if (wdev->iftype != NL80211_IFTYPE_AP &&
5898             wdev->iftype != NL80211_IFTYPE_P2P_GO)
5899                 return -EOPNOTSUPP;
5900
5901         if (!info->attrs[NL80211_ATTR_MAC])
5902                 return -EINVAL;
5903
5904         if (!rdev->ops->probe_client)
5905                 return -EOPNOTSUPP;
5906
5907         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5908         if (!msg)
5909                 return -ENOMEM;
5910
5911         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5912                              NL80211_CMD_PROBE_CLIENT);
5913
5914         if (IS_ERR(hdr)) {
5915                 err = PTR_ERR(hdr);
5916                 goto free_msg;
5917         }
5918
5919         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
5920
5921         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
5922         if (err)
5923                 goto free_msg;
5924
5925         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5926
5927         genlmsg_end(msg, hdr);
5928
5929         return genlmsg_reply(msg, info);
5930
5931  nla_put_failure:
5932         err = -ENOBUFS;
5933  free_msg:
5934         nlmsg_free(msg);
5935         return err;
5936 }
5937
5938 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
5939 {
5940         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5941
5942         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
5943                 return -EOPNOTSUPP;
5944
5945         if (rdev->ap_beacons_nlpid)
5946                 return -EBUSY;
5947
5948         rdev->ap_beacons_nlpid = info->snd_pid;
5949
5950         return 0;
5951 }
5952
5953 #define NL80211_FLAG_NEED_WIPHY         0x01
5954 #define NL80211_FLAG_NEED_NETDEV        0x02
5955 #define NL80211_FLAG_NEED_RTNL          0x04
5956 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
5957 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
5958                                          NL80211_FLAG_CHECK_NETDEV_UP)
5959
5960 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
5961                             struct genl_info *info)
5962 {
5963         struct cfg80211_registered_device *rdev;
5964         struct net_device *dev;
5965         int err;
5966         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
5967
5968         if (rtnl)
5969                 rtnl_lock();
5970
5971         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
5972                 rdev = cfg80211_get_dev_from_info(info);
5973                 if (IS_ERR(rdev)) {
5974                         if (rtnl)
5975                                 rtnl_unlock();
5976                         return PTR_ERR(rdev);
5977                 }
5978                 info->user_ptr[0] = rdev;
5979         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
5980                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5981                 if (err) {
5982                         if (rtnl)
5983                                 rtnl_unlock();
5984                         return err;
5985                 }
5986                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
5987                     !netif_running(dev)) {
5988                         cfg80211_unlock_rdev(rdev);
5989                         dev_put(dev);
5990                         if (rtnl)
5991                                 rtnl_unlock();
5992                         return -ENETDOWN;
5993                 }
5994                 info->user_ptr[0] = rdev;
5995                 info->user_ptr[1] = dev;
5996         }
5997
5998         return 0;
5999 }
6000
6001 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6002                               struct genl_info *info)
6003 {
6004         if (info->user_ptr[0])
6005                 cfg80211_unlock_rdev(info->user_ptr[0]);
6006         if (info->user_ptr[1])
6007                 dev_put(info->user_ptr[1]);
6008         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6009                 rtnl_unlock();
6010 }
6011
6012 static struct genl_ops nl80211_ops[] = {
6013         {
6014                 .cmd = NL80211_CMD_GET_WIPHY,
6015                 .doit = nl80211_get_wiphy,
6016                 .dumpit = nl80211_dump_wiphy,
6017                 .policy = nl80211_policy,
6018                 /* can be retrieved by unprivileged users */
6019                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6020         },
6021         {
6022                 .cmd = NL80211_CMD_SET_WIPHY,
6023                 .doit = nl80211_set_wiphy,
6024                 .policy = nl80211_policy,
6025                 .flags = GENL_ADMIN_PERM,
6026                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6027         },
6028         {
6029                 .cmd = NL80211_CMD_GET_INTERFACE,
6030                 .doit = nl80211_get_interface,
6031                 .dumpit = nl80211_dump_interface,
6032                 .policy = nl80211_policy,
6033                 /* can be retrieved by unprivileged users */
6034                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6035         },
6036         {
6037                 .cmd = NL80211_CMD_SET_INTERFACE,
6038                 .doit = nl80211_set_interface,
6039                 .policy = nl80211_policy,
6040                 .flags = GENL_ADMIN_PERM,
6041                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6042                                   NL80211_FLAG_NEED_RTNL,
6043         },
6044         {
6045                 .cmd = NL80211_CMD_NEW_INTERFACE,
6046                 .doit = nl80211_new_interface,
6047                 .policy = nl80211_policy,
6048                 .flags = GENL_ADMIN_PERM,
6049                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6050                                   NL80211_FLAG_NEED_RTNL,
6051         },
6052         {
6053                 .cmd = NL80211_CMD_DEL_INTERFACE,
6054                 .doit = nl80211_del_interface,
6055                 .policy = nl80211_policy,
6056                 .flags = GENL_ADMIN_PERM,
6057                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6058                                   NL80211_FLAG_NEED_RTNL,
6059         },
6060         {
6061                 .cmd = NL80211_CMD_GET_KEY,
6062                 .doit = nl80211_get_key,
6063                 .policy = nl80211_policy,
6064                 .flags = GENL_ADMIN_PERM,
6065                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6066                                   NL80211_FLAG_NEED_RTNL,
6067         },
6068         {
6069                 .cmd = NL80211_CMD_SET_KEY,
6070                 .doit = nl80211_set_key,
6071                 .policy = nl80211_policy,
6072                 .flags = GENL_ADMIN_PERM,
6073                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6074                                   NL80211_FLAG_NEED_RTNL,
6075         },
6076         {
6077                 .cmd = NL80211_CMD_NEW_KEY,
6078                 .doit = nl80211_new_key,
6079                 .policy = nl80211_policy,
6080                 .flags = GENL_ADMIN_PERM,
6081                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6082                                   NL80211_FLAG_NEED_RTNL,
6083         },
6084         {
6085                 .cmd = NL80211_CMD_DEL_KEY,
6086                 .doit = nl80211_del_key,
6087                 .policy = nl80211_policy,
6088                 .flags = GENL_ADMIN_PERM,
6089                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6090                                   NL80211_FLAG_NEED_RTNL,
6091         },
6092         {
6093                 .cmd = NL80211_CMD_SET_BEACON,
6094                 .policy = nl80211_policy,
6095                 .flags = GENL_ADMIN_PERM,
6096                 .doit = nl80211_addset_beacon,
6097                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6098                                   NL80211_FLAG_NEED_RTNL,
6099         },
6100         {
6101                 .cmd = NL80211_CMD_NEW_BEACON,
6102                 .policy = nl80211_policy,
6103                 .flags = GENL_ADMIN_PERM,
6104                 .doit = nl80211_addset_beacon,
6105                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6106                                   NL80211_FLAG_NEED_RTNL,
6107         },
6108         {
6109                 .cmd = NL80211_CMD_DEL_BEACON,
6110                 .policy = nl80211_policy,
6111                 .flags = GENL_ADMIN_PERM,
6112                 .doit = nl80211_del_beacon,
6113                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6114                                   NL80211_FLAG_NEED_RTNL,
6115         },
6116         {
6117                 .cmd = NL80211_CMD_GET_STATION,
6118                 .doit = nl80211_get_station,
6119                 .dumpit = nl80211_dump_station,
6120                 .policy = nl80211_policy,
6121                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6122                                   NL80211_FLAG_NEED_RTNL,
6123         },
6124         {
6125                 .cmd = NL80211_CMD_SET_STATION,
6126                 .doit = nl80211_set_station,
6127                 .policy = nl80211_policy,
6128                 .flags = GENL_ADMIN_PERM,
6129                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6130                                   NL80211_FLAG_NEED_RTNL,
6131         },
6132         {
6133                 .cmd = NL80211_CMD_NEW_STATION,
6134                 .doit = nl80211_new_station,
6135                 .policy = nl80211_policy,
6136                 .flags = GENL_ADMIN_PERM,
6137                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6138                                   NL80211_FLAG_NEED_RTNL,
6139         },
6140         {
6141                 .cmd = NL80211_CMD_DEL_STATION,
6142                 .doit = nl80211_del_station,
6143                 .policy = nl80211_policy,
6144                 .flags = GENL_ADMIN_PERM,
6145                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6146                                   NL80211_FLAG_NEED_RTNL,
6147         },
6148         {
6149                 .cmd = NL80211_CMD_GET_MPATH,
6150                 .doit = nl80211_get_mpath,
6151                 .dumpit = nl80211_dump_mpath,
6152                 .policy = nl80211_policy,
6153                 .flags = GENL_ADMIN_PERM,
6154                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6155                                   NL80211_FLAG_NEED_RTNL,
6156         },
6157         {
6158                 .cmd = NL80211_CMD_SET_MPATH,
6159                 .doit = nl80211_set_mpath,
6160                 .policy = nl80211_policy,
6161                 .flags = GENL_ADMIN_PERM,
6162                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6163                                   NL80211_FLAG_NEED_RTNL,
6164         },
6165         {
6166                 .cmd = NL80211_CMD_NEW_MPATH,
6167                 .doit = nl80211_new_mpath,
6168                 .policy = nl80211_policy,
6169                 .flags = GENL_ADMIN_PERM,
6170                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6171                                   NL80211_FLAG_NEED_RTNL,
6172         },
6173         {
6174                 .cmd = NL80211_CMD_DEL_MPATH,
6175                 .doit = nl80211_del_mpath,
6176                 .policy = nl80211_policy,
6177                 .flags = GENL_ADMIN_PERM,
6178                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6179                                   NL80211_FLAG_NEED_RTNL,
6180         },
6181         {
6182                 .cmd = NL80211_CMD_SET_BSS,
6183                 .doit = nl80211_set_bss,
6184                 .policy = nl80211_policy,
6185                 .flags = GENL_ADMIN_PERM,
6186                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6187                                   NL80211_FLAG_NEED_RTNL,
6188         },
6189         {
6190                 .cmd = NL80211_CMD_GET_REG,
6191                 .doit = nl80211_get_reg,
6192                 .policy = nl80211_policy,
6193                 /* can be retrieved by unprivileged users */
6194         },
6195         {
6196                 .cmd = NL80211_CMD_SET_REG,
6197                 .doit = nl80211_set_reg,
6198                 .policy = nl80211_policy,
6199                 .flags = GENL_ADMIN_PERM,
6200         },
6201         {
6202                 .cmd = NL80211_CMD_REQ_SET_REG,
6203                 .doit = nl80211_req_set_reg,
6204                 .policy = nl80211_policy,
6205                 .flags = GENL_ADMIN_PERM,
6206         },
6207         {
6208                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6209                 .doit = nl80211_get_mesh_config,
6210                 .policy = nl80211_policy,
6211                 /* can be retrieved by unprivileged users */
6212                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6213                                   NL80211_FLAG_NEED_RTNL,
6214         },
6215         {
6216                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6217                 .doit = nl80211_update_mesh_config,
6218                 .policy = nl80211_policy,
6219                 .flags = GENL_ADMIN_PERM,
6220                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6221                                   NL80211_FLAG_NEED_RTNL,
6222         },
6223         {
6224                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6225                 .doit = nl80211_trigger_scan,
6226                 .policy = nl80211_policy,
6227                 .flags = GENL_ADMIN_PERM,
6228                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6229                                   NL80211_FLAG_NEED_RTNL,
6230         },
6231         {
6232                 .cmd = NL80211_CMD_GET_SCAN,
6233                 .policy = nl80211_policy,
6234                 .dumpit = nl80211_dump_scan,
6235         },
6236         {
6237                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6238                 .doit = nl80211_start_sched_scan,
6239                 .policy = nl80211_policy,
6240                 .flags = GENL_ADMIN_PERM,
6241                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6242                                   NL80211_FLAG_NEED_RTNL,
6243         },
6244         {
6245                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6246                 .doit = nl80211_stop_sched_scan,
6247                 .policy = nl80211_policy,
6248                 .flags = GENL_ADMIN_PERM,
6249                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6250                                   NL80211_FLAG_NEED_RTNL,
6251         },
6252         {
6253                 .cmd = NL80211_CMD_AUTHENTICATE,
6254                 .doit = nl80211_authenticate,
6255                 .policy = nl80211_policy,
6256                 .flags = GENL_ADMIN_PERM,
6257                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6258                                   NL80211_FLAG_NEED_RTNL,
6259         },
6260         {
6261                 .cmd = NL80211_CMD_ASSOCIATE,
6262                 .doit = nl80211_associate,
6263                 .policy = nl80211_policy,
6264                 .flags = GENL_ADMIN_PERM,
6265                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6266                                   NL80211_FLAG_NEED_RTNL,
6267         },
6268         {
6269                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6270                 .doit = nl80211_deauthenticate,
6271                 .policy = nl80211_policy,
6272                 .flags = GENL_ADMIN_PERM,
6273                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6274                                   NL80211_FLAG_NEED_RTNL,
6275         },
6276         {
6277                 .cmd = NL80211_CMD_DISASSOCIATE,
6278                 .doit = nl80211_disassociate,
6279                 .policy = nl80211_policy,
6280                 .flags = GENL_ADMIN_PERM,
6281                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6282                                   NL80211_FLAG_NEED_RTNL,
6283         },
6284         {
6285                 .cmd = NL80211_CMD_JOIN_IBSS,
6286                 .doit = nl80211_join_ibss,
6287                 .policy = nl80211_policy,
6288                 .flags = GENL_ADMIN_PERM,
6289                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6290                                   NL80211_FLAG_NEED_RTNL,
6291         },
6292         {
6293                 .cmd = NL80211_CMD_LEAVE_IBSS,
6294                 .doit = nl80211_leave_ibss,
6295                 .policy = nl80211_policy,
6296                 .flags = GENL_ADMIN_PERM,
6297                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6298                                   NL80211_FLAG_NEED_RTNL,
6299         },
6300 #ifdef CONFIG_NL80211_TESTMODE
6301         {
6302                 .cmd = NL80211_CMD_TESTMODE,
6303                 .doit = nl80211_testmode_do,
6304                 .dumpit = nl80211_testmode_dump,
6305                 .policy = nl80211_policy,
6306                 .flags = GENL_ADMIN_PERM,
6307                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6308                                   NL80211_FLAG_NEED_RTNL,
6309         },
6310 #endif
6311         {
6312                 .cmd = NL80211_CMD_CONNECT,
6313                 .doit = nl80211_connect,
6314                 .policy = nl80211_policy,
6315                 .flags = GENL_ADMIN_PERM,
6316                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6317                                   NL80211_FLAG_NEED_RTNL,
6318         },
6319         {
6320                 .cmd = NL80211_CMD_DISCONNECT,
6321                 .doit = nl80211_disconnect,
6322                 .policy = nl80211_policy,
6323                 .flags = GENL_ADMIN_PERM,
6324                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6325                                   NL80211_FLAG_NEED_RTNL,
6326         },
6327         {
6328                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6329                 .doit = nl80211_wiphy_netns,
6330                 .policy = nl80211_policy,
6331                 .flags = GENL_ADMIN_PERM,
6332                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6333                                   NL80211_FLAG_NEED_RTNL,
6334         },
6335         {
6336                 .cmd = NL80211_CMD_GET_SURVEY,
6337                 .policy = nl80211_policy,
6338                 .dumpit = nl80211_dump_survey,
6339         },
6340         {
6341                 .cmd = NL80211_CMD_SET_PMKSA,
6342                 .doit = nl80211_setdel_pmksa,
6343                 .policy = nl80211_policy,
6344                 .flags = GENL_ADMIN_PERM,
6345                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6346                                   NL80211_FLAG_NEED_RTNL,
6347         },
6348         {
6349                 .cmd = NL80211_CMD_DEL_PMKSA,
6350                 .doit = nl80211_setdel_pmksa,
6351                 .policy = nl80211_policy,
6352                 .flags = GENL_ADMIN_PERM,
6353                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6354                                   NL80211_FLAG_NEED_RTNL,
6355         },
6356         {
6357                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6358                 .doit = nl80211_flush_pmksa,
6359                 .policy = nl80211_policy,
6360                 .flags = GENL_ADMIN_PERM,
6361                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6362                                   NL80211_FLAG_NEED_RTNL,
6363         },
6364         {
6365                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6366                 .doit = nl80211_remain_on_channel,
6367                 .policy = nl80211_policy,
6368                 .flags = GENL_ADMIN_PERM,
6369                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6370                                   NL80211_FLAG_NEED_RTNL,
6371         },
6372         {
6373                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6374                 .doit = nl80211_cancel_remain_on_channel,
6375                 .policy = nl80211_policy,
6376                 .flags = GENL_ADMIN_PERM,
6377                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6378                                   NL80211_FLAG_NEED_RTNL,
6379         },
6380         {
6381                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6382                 .doit = nl80211_set_tx_bitrate_mask,
6383                 .policy = nl80211_policy,
6384                 .flags = GENL_ADMIN_PERM,
6385                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6386                                   NL80211_FLAG_NEED_RTNL,
6387         },
6388         {
6389                 .cmd = NL80211_CMD_REGISTER_FRAME,
6390                 .doit = nl80211_register_mgmt,
6391                 .policy = nl80211_policy,
6392                 .flags = GENL_ADMIN_PERM,
6393                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6394                                   NL80211_FLAG_NEED_RTNL,
6395         },
6396         {
6397                 .cmd = NL80211_CMD_FRAME,
6398                 .doit = nl80211_tx_mgmt,
6399                 .policy = nl80211_policy,
6400                 .flags = GENL_ADMIN_PERM,
6401                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6402                                   NL80211_FLAG_NEED_RTNL,
6403         },
6404         {
6405                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6406                 .doit = nl80211_tx_mgmt_cancel_wait,
6407                 .policy = nl80211_policy,
6408                 .flags = GENL_ADMIN_PERM,
6409                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6410                                   NL80211_FLAG_NEED_RTNL,
6411         },
6412         {
6413                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6414                 .doit = nl80211_set_power_save,
6415                 .policy = nl80211_policy,
6416                 .flags = GENL_ADMIN_PERM,
6417                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6418                                   NL80211_FLAG_NEED_RTNL,
6419         },
6420         {
6421                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6422                 .doit = nl80211_get_power_save,
6423                 .policy = nl80211_policy,
6424                 /* can be retrieved by unprivileged users */
6425                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6426                                   NL80211_FLAG_NEED_RTNL,
6427         },
6428         {
6429                 .cmd = NL80211_CMD_SET_CQM,
6430                 .doit = nl80211_set_cqm,
6431                 .policy = nl80211_policy,
6432                 .flags = GENL_ADMIN_PERM,
6433                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6434                                   NL80211_FLAG_NEED_RTNL,
6435         },
6436         {
6437                 .cmd = NL80211_CMD_SET_CHANNEL,
6438                 .doit = nl80211_set_channel,
6439                 .policy = nl80211_policy,
6440                 .flags = GENL_ADMIN_PERM,
6441                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6442                                   NL80211_FLAG_NEED_RTNL,
6443         },
6444         {
6445                 .cmd = NL80211_CMD_SET_WDS_PEER,
6446                 .doit = nl80211_set_wds_peer,
6447                 .policy = nl80211_policy,
6448                 .flags = GENL_ADMIN_PERM,
6449                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6450                                   NL80211_FLAG_NEED_RTNL,
6451         },
6452         {
6453                 .cmd = NL80211_CMD_JOIN_MESH,
6454                 .doit = nl80211_join_mesh,
6455                 .policy = nl80211_policy,
6456                 .flags = GENL_ADMIN_PERM,
6457                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6458                                   NL80211_FLAG_NEED_RTNL,
6459         },
6460         {
6461                 .cmd = NL80211_CMD_LEAVE_MESH,
6462                 .doit = nl80211_leave_mesh,
6463                 .policy = nl80211_policy,
6464                 .flags = GENL_ADMIN_PERM,
6465                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6466                                   NL80211_FLAG_NEED_RTNL,
6467         },
6468         {
6469                 .cmd = NL80211_CMD_GET_WOWLAN,
6470                 .doit = nl80211_get_wowlan,
6471                 .policy = nl80211_policy,
6472                 /* can be retrieved by unprivileged users */
6473                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6474                                   NL80211_FLAG_NEED_RTNL,
6475         },
6476         {
6477                 .cmd = NL80211_CMD_SET_WOWLAN,
6478                 .doit = nl80211_set_wowlan,
6479                 .policy = nl80211_policy,
6480                 .flags = GENL_ADMIN_PERM,
6481                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6482                                   NL80211_FLAG_NEED_RTNL,
6483         },
6484         {
6485                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6486                 .doit = nl80211_set_rekey_data,
6487                 .policy = nl80211_policy,
6488                 .flags = GENL_ADMIN_PERM,
6489                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6490                                   NL80211_FLAG_NEED_RTNL,
6491         },
6492         {
6493                 .cmd = NL80211_CMD_TDLS_MGMT,
6494                 .doit = nl80211_tdls_mgmt,
6495                 .policy = nl80211_policy,
6496                 .flags = GENL_ADMIN_PERM,
6497                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6498                                   NL80211_FLAG_NEED_RTNL,
6499         },
6500         {
6501                 .cmd = NL80211_CMD_TDLS_OPER,
6502                 .doit = nl80211_tdls_oper,
6503                 .policy = nl80211_policy,
6504                 .flags = GENL_ADMIN_PERM,
6505                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6506                                   NL80211_FLAG_NEED_RTNL,
6507         },
6508         {
6509                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6510                 .doit = nl80211_register_unexpected_frame,
6511                 .policy = nl80211_policy,
6512                 .flags = GENL_ADMIN_PERM,
6513                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6514                                   NL80211_FLAG_NEED_RTNL,
6515         },
6516         {
6517                 .cmd = NL80211_CMD_PROBE_CLIENT,
6518                 .doit = nl80211_probe_client,
6519                 .policy = nl80211_policy,
6520                 .flags = GENL_ADMIN_PERM,
6521                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6522                                   NL80211_FLAG_NEED_RTNL,
6523         },
6524         {
6525                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6526                 .doit = nl80211_register_beacons,
6527                 .policy = nl80211_policy,
6528                 .flags = GENL_ADMIN_PERM,
6529                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6530                                   NL80211_FLAG_NEED_RTNL,
6531         },
6532 };
6533
6534 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6535         .name = "mlme",
6536 };
6537
6538 /* multicast groups */
6539 static struct genl_multicast_group nl80211_config_mcgrp = {
6540         .name = "config",
6541 };
6542 static struct genl_multicast_group nl80211_scan_mcgrp = {
6543         .name = "scan",
6544 };
6545 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6546         .name = "regulatory",
6547 };
6548
6549 /* notification functions */
6550
6551 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6552 {
6553         struct sk_buff *msg;
6554
6555         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6556         if (!msg)
6557                 return;
6558
6559         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
6560                 nlmsg_free(msg);
6561                 return;
6562         }
6563
6564         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6565                                 nl80211_config_mcgrp.id, GFP_KERNEL);
6566 }
6567
6568 static int nl80211_add_scan_req(struct sk_buff *msg,
6569                                 struct cfg80211_registered_device *rdev)
6570 {
6571         struct cfg80211_scan_request *req = rdev->scan_req;
6572         struct nlattr *nest;
6573         int i;
6574
6575         ASSERT_RDEV_LOCK(rdev);
6576
6577         if (WARN_ON(!req))
6578                 return 0;
6579
6580         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
6581         if (!nest)
6582                 goto nla_put_failure;
6583         for (i = 0; i < req->n_ssids; i++)
6584                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
6585         nla_nest_end(msg, nest);
6586
6587         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
6588         if (!nest)
6589                 goto nla_put_failure;
6590         for (i = 0; i < req->n_channels; i++)
6591                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
6592         nla_nest_end(msg, nest);
6593
6594         if (req->ie)
6595                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
6596
6597         return 0;
6598  nla_put_failure:
6599         return -ENOBUFS;
6600 }
6601
6602 static int nl80211_send_scan_msg(struct sk_buff *msg,
6603                                  struct cfg80211_registered_device *rdev,
6604                                  struct net_device *netdev,
6605                                  u32 pid, u32 seq, int flags,
6606                                  u32 cmd)
6607 {
6608         void *hdr;
6609
6610         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6611         if (!hdr)
6612                 return -1;
6613
6614         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6615         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6616
6617         /* ignore errors and send incomplete event anyway */
6618         nl80211_add_scan_req(msg, rdev);
6619
6620         return genlmsg_end(msg, hdr);
6621
6622  nla_put_failure:
6623         genlmsg_cancel(msg, hdr);
6624         return -EMSGSIZE;
6625 }
6626
6627 static int
6628 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6629                             struct cfg80211_registered_device *rdev,
6630                             struct net_device *netdev,
6631                             u32 pid, u32 seq, int flags, u32 cmd)
6632 {
6633         void *hdr;
6634
6635         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6636         if (!hdr)
6637                 return -1;
6638
6639         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6640         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6641
6642         return genlmsg_end(msg, hdr);
6643
6644  nla_put_failure:
6645         genlmsg_cancel(msg, hdr);
6646         return -EMSGSIZE;
6647 }
6648
6649 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
6650                              struct net_device *netdev)
6651 {
6652         struct sk_buff *msg;
6653
6654         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6655         if (!msg)
6656                 return;
6657
6658         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6659                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
6660                 nlmsg_free(msg);
6661                 return;
6662         }
6663
6664         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6665                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6666 }
6667
6668 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
6669                             struct net_device *netdev)
6670 {
6671         struct sk_buff *msg;
6672
6673         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6674         if (!msg)
6675                 return;
6676
6677         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6678                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
6679                 nlmsg_free(msg);
6680                 return;
6681         }
6682
6683         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6684                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6685 }
6686
6687 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
6688                                struct net_device *netdev)
6689 {
6690         struct sk_buff *msg;
6691
6692         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6693         if (!msg)
6694                 return;
6695
6696         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6697                                   NL80211_CMD_SCAN_ABORTED) < 0) {
6698                 nlmsg_free(msg);
6699                 return;
6700         }
6701
6702         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6703                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6704 }
6705
6706 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
6707                                      struct net_device *netdev)
6708 {
6709         struct sk_buff *msg;
6710
6711         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6712         if (!msg)
6713                 return;
6714
6715         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
6716                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
6717                 nlmsg_free(msg);
6718                 return;
6719         }
6720
6721         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6722                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6723 }
6724
6725 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
6726                              struct net_device *netdev, u32 cmd)
6727 {
6728         struct sk_buff *msg;
6729
6730         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6731         if (!msg)
6732                 return;
6733
6734         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
6735                 nlmsg_free(msg);
6736                 return;
6737         }
6738
6739         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6740                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6741 }
6742
6743 /*
6744  * This can happen on global regulatory changes or device specific settings
6745  * based on custom world regulatory domains.
6746  */
6747 void nl80211_send_reg_change_event(struct regulatory_request *request)
6748 {
6749         struct sk_buff *msg;
6750         void *hdr;
6751
6752         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6753         if (!msg)
6754                 return;
6755
6756         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
6757         if (!hdr) {
6758                 nlmsg_free(msg);
6759                 return;
6760         }
6761
6762         /* Userspace can always count this one always being set */
6763         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
6764
6765         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
6766                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6767                            NL80211_REGDOM_TYPE_WORLD);
6768         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
6769                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6770                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
6771         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
6772                  request->intersect)
6773                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6774                            NL80211_REGDOM_TYPE_INTERSECTION);
6775         else {
6776                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6777                            NL80211_REGDOM_TYPE_COUNTRY);
6778                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
6779         }
6780
6781         if (wiphy_idx_valid(request->wiphy_idx))
6782                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
6783
6784         genlmsg_end(msg, hdr);
6785
6786         rcu_read_lock();
6787         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6788                                 GFP_ATOMIC);
6789         rcu_read_unlock();
6790
6791         return;
6792
6793 nla_put_failure:
6794         genlmsg_cancel(msg, hdr);
6795         nlmsg_free(msg);
6796 }
6797
6798 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
6799                                     struct net_device *netdev,
6800                                     const u8 *buf, size_t len,
6801                                     enum nl80211_commands cmd, gfp_t gfp)
6802 {
6803         struct sk_buff *msg;
6804         void *hdr;
6805
6806         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6807         if (!msg)
6808                 return;
6809
6810         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6811         if (!hdr) {
6812                 nlmsg_free(msg);
6813                 return;
6814         }
6815
6816         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6817         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6818         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6819
6820         genlmsg_end(msg, hdr);
6821
6822         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6823                                 nl80211_mlme_mcgrp.id, gfp);
6824         return;
6825
6826  nla_put_failure:
6827         genlmsg_cancel(msg, hdr);
6828         nlmsg_free(msg);
6829 }
6830
6831 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
6832                           struct net_device *netdev, const u8 *buf,
6833                           size_t len, gfp_t gfp)
6834 {
6835         nl80211_send_mlme_event(rdev, netdev, buf, len,
6836                                 NL80211_CMD_AUTHENTICATE, gfp);
6837 }
6838
6839 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
6840                            struct net_device *netdev, const u8 *buf,
6841                            size_t len, gfp_t gfp)
6842 {
6843         nl80211_send_mlme_event(rdev, netdev, buf, len,
6844                                 NL80211_CMD_ASSOCIATE, gfp);
6845 }
6846
6847 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
6848                          struct net_device *netdev, const u8 *buf,
6849                          size_t len, gfp_t gfp)
6850 {
6851         nl80211_send_mlme_event(rdev, netdev, buf, len,
6852                                 NL80211_CMD_DEAUTHENTICATE, gfp);
6853 }
6854
6855 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
6856                            struct net_device *netdev, const u8 *buf,
6857                            size_t len, gfp_t gfp)
6858 {
6859         nl80211_send_mlme_event(rdev, netdev, buf, len,
6860                                 NL80211_CMD_DISASSOCIATE, gfp);
6861 }
6862
6863 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
6864                                 struct net_device *netdev, const u8 *buf,
6865                                 size_t len, gfp_t gfp)
6866 {
6867         nl80211_send_mlme_event(rdev, netdev, buf, len,
6868                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
6869 }
6870
6871 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
6872                                   struct net_device *netdev, const u8 *buf,
6873                                   size_t len, gfp_t gfp)
6874 {
6875         nl80211_send_mlme_event(rdev, netdev, buf, len,
6876                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
6877 }
6878
6879 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
6880                                       struct net_device *netdev, int cmd,
6881                                       const u8 *addr, gfp_t gfp)
6882 {
6883         struct sk_buff *msg;
6884         void *hdr;
6885
6886         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6887         if (!msg)
6888                 return;
6889
6890         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6891         if (!hdr) {
6892                 nlmsg_free(msg);
6893                 return;
6894         }
6895
6896         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6897         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6898         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
6899         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6900
6901         genlmsg_end(msg, hdr);
6902
6903         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6904                                 nl80211_mlme_mcgrp.id, gfp);
6905         return;
6906
6907  nla_put_failure:
6908         genlmsg_cancel(msg, hdr);
6909         nlmsg_free(msg);
6910 }
6911
6912 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
6913                                struct net_device *netdev, const u8 *addr,
6914                                gfp_t gfp)
6915 {
6916         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
6917                                   addr, gfp);
6918 }
6919
6920 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
6921                                 struct net_device *netdev, const u8 *addr,
6922                                 gfp_t gfp)
6923 {
6924         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
6925                                   addr, gfp);
6926 }
6927
6928 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
6929                                  struct net_device *netdev, const u8 *bssid,
6930                                  const u8 *req_ie, size_t req_ie_len,
6931                                  const u8 *resp_ie, size_t resp_ie_len,
6932                                  u16 status, gfp_t gfp)
6933 {
6934         struct sk_buff *msg;
6935         void *hdr;
6936
6937         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6938         if (!msg)
6939                 return;
6940
6941         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
6942         if (!hdr) {
6943                 nlmsg_free(msg);
6944                 return;
6945         }
6946
6947         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6948         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6949         if (bssid)
6950                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6951         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
6952         if (req_ie)
6953                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6954         if (resp_ie)
6955                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6956
6957         genlmsg_end(msg, hdr);
6958
6959         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6960                                 nl80211_mlme_mcgrp.id, gfp);
6961         return;
6962
6963  nla_put_failure:
6964         genlmsg_cancel(msg, hdr);
6965         nlmsg_free(msg);
6966
6967 }
6968
6969 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
6970                          struct net_device *netdev, const u8 *bssid,
6971                          const u8 *req_ie, size_t req_ie_len,
6972                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
6973 {
6974         struct sk_buff *msg;
6975         void *hdr;
6976
6977         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6978         if (!msg)
6979                 return;
6980
6981         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
6982         if (!hdr) {
6983                 nlmsg_free(msg);
6984                 return;
6985         }
6986
6987         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6988         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6989         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6990         if (req_ie)
6991                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6992         if (resp_ie)
6993                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6994
6995         genlmsg_end(msg, hdr);
6996
6997         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6998                                 nl80211_mlme_mcgrp.id, gfp);
6999         return;
7000
7001  nla_put_failure:
7002         genlmsg_cancel(msg, hdr);
7003         nlmsg_free(msg);
7004
7005 }
7006
7007 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7008                                struct net_device *netdev, u16 reason,
7009                                const u8 *ie, size_t ie_len, bool from_ap)
7010 {
7011         struct sk_buff *msg;
7012         void *hdr;
7013
7014         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7015         if (!msg)
7016                 return;
7017
7018         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7019         if (!hdr) {
7020                 nlmsg_free(msg);
7021                 return;
7022         }
7023
7024         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7025         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7026         if (from_ap && reason)
7027                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
7028         if (from_ap)
7029                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
7030         if (ie)
7031                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
7032
7033         genlmsg_end(msg, hdr);
7034
7035         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7036                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7037         return;
7038
7039  nla_put_failure:
7040         genlmsg_cancel(msg, hdr);
7041         nlmsg_free(msg);
7042
7043 }
7044
7045 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7046                              struct net_device *netdev, const u8 *bssid,
7047                              gfp_t gfp)
7048 {
7049         struct sk_buff *msg;
7050         void *hdr;
7051
7052         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7053         if (!msg)
7054                 return;
7055
7056         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7057         if (!hdr) {
7058                 nlmsg_free(msg);
7059                 return;
7060         }
7061
7062         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7063         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7064         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7065
7066         genlmsg_end(msg, hdr);
7067
7068         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7069                                 nl80211_mlme_mcgrp.id, gfp);
7070         return;
7071
7072  nla_put_failure:
7073         genlmsg_cancel(msg, hdr);
7074         nlmsg_free(msg);
7075 }
7076
7077 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7078                 struct net_device *netdev,
7079                 const u8 *macaddr, const u8* ie, u8 ie_len,
7080                 gfp_t gfp)
7081 {
7082         struct sk_buff *msg;
7083         void *hdr;
7084
7085         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7086         if (!msg)
7087                 return;
7088
7089         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7090         if (!hdr) {
7091                 nlmsg_free(msg);
7092                 return;
7093         }
7094
7095         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7096         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7097         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
7098         if (ie_len && ie)
7099                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
7100
7101         genlmsg_end(msg, hdr);
7102
7103         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7104                                 nl80211_mlme_mcgrp.id, gfp);
7105         return;
7106
7107  nla_put_failure:
7108         genlmsg_cancel(msg, hdr);
7109         nlmsg_free(msg);
7110 }
7111
7112 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7113                                  struct net_device *netdev, const u8 *addr,
7114                                  enum nl80211_key_type key_type, int key_id,
7115                                  const u8 *tsc, gfp_t gfp)
7116 {
7117         struct sk_buff *msg;
7118         void *hdr;
7119
7120         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7121         if (!msg)
7122                 return;
7123
7124         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7125         if (!hdr) {
7126                 nlmsg_free(msg);
7127                 return;
7128         }
7129
7130         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7131         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7132         if (addr)
7133                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7134         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
7135         if (key_id != -1)
7136                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
7137         if (tsc)
7138                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
7139
7140         genlmsg_end(msg, hdr);
7141
7142         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7143                                 nl80211_mlme_mcgrp.id, gfp);
7144         return;
7145
7146  nla_put_failure:
7147         genlmsg_cancel(msg, hdr);
7148         nlmsg_free(msg);
7149 }
7150
7151 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7152                                     struct ieee80211_channel *channel_before,
7153                                     struct ieee80211_channel *channel_after)
7154 {
7155         struct sk_buff *msg;
7156         void *hdr;
7157         struct nlattr *nl_freq;
7158
7159         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7160         if (!msg)
7161                 return;
7162
7163         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7164         if (!hdr) {
7165                 nlmsg_free(msg);
7166                 return;
7167         }
7168
7169         /*
7170          * Since we are applying the beacon hint to a wiphy we know its
7171          * wiphy_idx is valid
7172          */
7173         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
7174
7175         /* Before */
7176         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7177         if (!nl_freq)
7178                 goto nla_put_failure;
7179         if (nl80211_msg_put_channel(msg, channel_before))
7180                 goto nla_put_failure;
7181         nla_nest_end(msg, nl_freq);
7182
7183         /* After */
7184         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7185         if (!nl_freq)
7186                 goto nla_put_failure;
7187         if (nl80211_msg_put_channel(msg, channel_after))
7188                 goto nla_put_failure;
7189         nla_nest_end(msg, nl_freq);
7190
7191         genlmsg_end(msg, hdr);
7192
7193         rcu_read_lock();
7194         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7195                                 GFP_ATOMIC);
7196         rcu_read_unlock();
7197
7198         return;
7199
7200 nla_put_failure:
7201         genlmsg_cancel(msg, hdr);
7202         nlmsg_free(msg);
7203 }
7204
7205 static void nl80211_send_remain_on_chan_event(
7206         int cmd, struct cfg80211_registered_device *rdev,
7207         struct net_device *netdev, u64 cookie,
7208         struct ieee80211_channel *chan,
7209         enum nl80211_channel_type channel_type,
7210         unsigned int duration, gfp_t gfp)
7211 {
7212         struct sk_buff *msg;
7213         void *hdr;
7214
7215         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7216         if (!msg)
7217                 return;
7218
7219         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7220         if (!hdr) {
7221                 nlmsg_free(msg);
7222                 return;
7223         }
7224
7225         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7226         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7227         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
7228         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
7229         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7230
7231         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
7232                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
7233
7234         genlmsg_end(msg, hdr);
7235
7236         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7237                                 nl80211_mlme_mcgrp.id, gfp);
7238         return;
7239
7240  nla_put_failure:
7241         genlmsg_cancel(msg, hdr);
7242         nlmsg_free(msg);
7243 }
7244
7245 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7246                                     struct net_device *netdev, u64 cookie,
7247                                     struct ieee80211_channel *chan,
7248                                     enum nl80211_channel_type channel_type,
7249                                     unsigned int duration, gfp_t gfp)
7250 {
7251         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7252                                           rdev, netdev, cookie, chan,
7253                                           channel_type, duration, gfp);
7254 }
7255
7256 void nl80211_send_remain_on_channel_cancel(
7257         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7258         u64 cookie, struct ieee80211_channel *chan,
7259         enum nl80211_channel_type channel_type, gfp_t gfp)
7260 {
7261         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7262                                           rdev, netdev, cookie, chan,
7263                                           channel_type, 0, gfp);
7264 }
7265
7266 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7267                             struct net_device *dev, const u8 *mac_addr,
7268                             struct station_info *sinfo, gfp_t gfp)
7269 {
7270         struct sk_buff *msg;
7271
7272         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7273         if (!msg)
7274                 return;
7275
7276         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
7277                 nlmsg_free(msg);
7278                 return;
7279         }
7280
7281         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7282                                 nl80211_mlme_mcgrp.id, gfp);
7283 }
7284
7285 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7286                                 struct net_device *dev, const u8 *mac_addr,
7287                                 gfp_t gfp)
7288 {
7289         struct sk_buff *msg;
7290         void *hdr;
7291
7292         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7293         if (!msg)
7294                 return;
7295
7296         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7297         if (!hdr) {
7298                 nlmsg_free(msg);
7299                 return;
7300         }
7301
7302         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7303         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
7304
7305         genlmsg_end(msg, hdr);
7306
7307         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7308                                 nl80211_mlme_mcgrp.id, gfp);
7309         return;
7310
7311  nla_put_failure:
7312         genlmsg_cancel(msg, hdr);
7313         nlmsg_free(msg);
7314 }
7315
7316 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7317                                        const u8 *addr, gfp_t gfp)
7318 {
7319         struct wireless_dev *wdev = dev->ieee80211_ptr;
7320         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7321         struct sk_buff *msg;
7322         void *hdr;
7323         int err;
7324         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7325
7326         if (!nlpid)
7327                 return false;
7328
7329         msg = nlmsg_new(100, gfp);
7330         if (!msg)
7331                 return true;
7332
7333         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7334         if (!hdr) {
7335                 nlmsg_free(msg);
7336                 return true;
7337         }
7338
7339         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7340         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7341         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7342
7343         err = genlmsg_end(msg, hdr);
7344         if (err < 0) {
7345                 nlmsg_free(msg);
7346                 return true;
7347         }
7348
7349         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7350         return true;
7351
7352  nla_put_failure:
7353         genlmsg_cancel(msg, hdr);
7354         nlmsg_free(msg);
7355         return true;
7356 }
7357
7358 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7359 {
7360         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7361                                           addr, gfp);
7362 }
7363
7364 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7365                                     const u8 *addr, gfp_t gfp)
7366 {
7367         return __nl80211_unexpected_frame(dev,
7368                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7369                                           addr, gfp);
7370 }
7371
7372 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7373                       struct net_device *netdev, u32 nlpid,
7374                       int freq, const u8 *buf, size_t len, gfp_t gfp)
7375 {
7376         struct sk_buff *msg;
7377         void *hdr;
7378
7379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7380         if (!msg)
7381                 return -ENOMEM;
7382
7383         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7384         if (!hdr) {
7385                 nlmsg_free(msg);
7386                 return -ENOMEM;
7387         }
7388
7389         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7390         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7391         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7392         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7393
7394         genlmsg_end(msg, hdr);
7395
7396         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7397
7398  nla_put_failure:
7399         genlmsg_cancel(msg, hdr);
7400         nlmsg_free(msg);
7401         return -ENOBUFS;
7402 }
7403
7404 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7405                                  struct net_device *netdev, u64 cookie,
7406                                  const u8 *buf, size_t len, bool ack,
7407                                  gfp_t gfp)
7408 {
7409         struct sk_buff *msg;
7410         void *hdr;
7411
7412         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7413         if (!msg)
7414                 return;
7415
7416         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7417         if (!hdr) {
7418                 nlmsg_free(msg);
7419                 return;
7420         }
7421
7422         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7423         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7424         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7425         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7426         if (ack)
7427                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7428
7429         genlmsg_end(msg, hdr);
7430
7431         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7432         return;
7433
7434  nla_put_failure:
7435         genlmsg_cancel(msg, hdr);
7436         nlmsg_free(msg);
7437 }
7438
7439 void
7440 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7441                              struct net_device *netdev,
7442                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7443                              gfp_t gfp)
7444 {
7445         struct sk_buff *msg;
7446         struct nlattr *pinfoattr;
7447         void *hdr;
7448
7449         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7450         if (!msg)
7451                 return;
7452
7453         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7454         if (!hdr) {
7455                 nlmsg_free(msg);
7456                 return;
7457         }
7458
7459         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7460         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7461
7462         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7463         if (!pinfoattr)
7464                 goto nla_put_failure;
7465
7466         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7467                     rssi_event);
7468
7469         nla_nest_end(msg, pinfoattr);
7470
7471         genlmsg_end(msg, hdr);
7472
7473         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7474                                 nl80211_mlme_mcgrp.id, gfp);
7475         return;
7476
7477  nla_put_failure:
7478         genlmsg_cancel(msg, hdr);
7479         nlmsg_free(msg);
7480 }
7481
7482 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7483                               struct net_device *netdev, const u8 *bssid,
7484                               const u8 *replay_ctr, gfp_t gfp)
7485 {
7486         struct sk_buff *msg;
7487         struct nlattr *rekey_attr;
7488         void *hdr;
7489
7490         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7491         if (!msg)
7492                 return;
7493
7494         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7495         if (!hdr) {
7496                 nlmsg_free(msg);
7497                 return;
7498         }
7499
7500         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7501         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7502         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7503
7504         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7505         if (!rekey_attr)
7506                 goto nla_put_failure;
7507
7508         NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7509                 NL80211_REPLAY_CTR_LEN, replay_ctr);
7510
7511         nla_nest_end(msg, rekey_attr);
7512
7513         genlmsg_end(msg, hdr);
7514
7515         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7516                                 nl80211_mlme_mcgrp.id, gfp);
7517         return;
7518
7519  nla_put_failure:
7520         genlmsg_cancel(msg, hdr);
7521         nlmsg_free(msg);
7522 }
7523
7524 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
7525                                     struct net_device *netdev, int index,
7526                                     const u8 *bssid, bool preauth, gfp_t gfp)
7527 {
7528         struct sk_buff *msg;
7529         struct nlattr *attr;
7530         void *hdr;
7531
7532         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7533         if (!msg)
7534                 return;
7535
7536         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
7537         if (!hdr) {
7538                 nlmsg_free(msg);
7539                 return;
7540         }
7541
7542         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7543         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7544
7545         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
7546         if (!attr)
7547                 goto nla_put_failure;
7548
7549         NLA_PUT_U32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index);
7550         NLA_PUT(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid);
7551         if (preauth)
7552                 NLA_PUT_FLAG(msg, NL80211_PMKSA_CANDIDATE_PREAUTH);
7553
7554         nla_nest_end(msg, attr);
7555
7556         genlmsg_end(msg, hdr);
7557
7558         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7559                                 nl80211_mlme_mcgrp.id, gfp);
7560         return;
7561
7562  nla_put_failure:
7563         genlmsg_cancel(msg, hdr);
7564         nlmsg_free(msg);
7565 }
7566
7567 void
7568 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
7569                                 struct net_device *netdev, const u8 *peer,
7570                                 u32 num_packets, gfp_t gfp)
7571 {
7572         struct sk_buff *msg;
7573         struct nlattr *pinfoattr;
7574         void *hdr;
7575
7576         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7577         if (!msg)
7578                 return;
7579
7580         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7581         if (!hdr) {
7582                 nlmsg_free(msg);
7583                 return;
7584         }
7585
7586         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7587         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7588         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
7589
7590         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7591         if (!pinfoattr)
7592                 goto nla_put_failure;
7593
7594         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
7595
7596         nla_nest_end(msg, pinfoattr);
7597
7598         genlmsg_end(msg, hdr);
7599
7600         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7601                                 nl80211_mlme_mcgrp.id, gfp);
7602         return;
7603
7604  nla_put_failure:
7605         genlmsg_cancel(msg, hdr);
7606         nlmsg_free(msg);
7607 }
7608
7609 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
7610                            u64 cookie, bool acked, gfp_t gfp)
7611 {
7612         struct wireless_dev *wdev = dev->ieee80211_ptr;
7613         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7614         struct sk_buff *msg;
7615         void *hdr;
7616         int err;
7617
7618         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7619         if (!msg)
7620                 return;
7621
7622         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
7623         if (!hdr) {
7624                 nlmsg_free(msg);
7625                 return;
7626         }
7627
7628         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7629         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7630         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7631         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7632         if (acked)
7633                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7634
7635         err = genlmsg_end(msg, hdr);
7636         if (err < 0) {
7637                 nlmsg_free(msg);
7638                 return;
7639         }
7640
7641         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7642                                 nl80211_mlme_mcgrp.id, gfp);
7643         return;
7644
7645  nla_put_failure:
7646         genlmsg_cancel(msg, hdr);
7647         nlmsg_free(msg);
7648 }
7649 EXPORT_SYMBOL(cfg80211_probe_status);
7650
7651 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
7652                                  const u8 *frame, size_t len,
7653                                  int freq, gfp_t gfp)
7654 {
7655         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
7656         struct sk_buff *msg;
7657         void *hdr;
7658         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
7659
7660         if (!nlpid)
7661                 return;
7662
7663         msg = nlmsg_new(len + 100, gfp);
7664         if (!msg)
7665                 return;
7666
7667         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7668         if (!hdr) {
7669                 nlmsg_free(msg);
7670                 return;
7671         }
7672
7673         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7674         if (freq)
7675                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7676         NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
7677
7678         genlmsg_end(msg, hdr);
7679
7680         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7681         return;
7682
7683  nla_put_failure:
7684         genlmsg_cancel(msg, hdr);
7685         nlmsg_free(msg);
7686 }
7687 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
7688
7689 static int nl80211_netlink_notify(struct notifier_block * nb,
7690                                   unsigned long state,
7691                                   void *_notify)
7692 {
7693         struct netlink_notify *notify = _notify;
7694         struct cfg80211_registered_device *rdev;
7695         struct wireless_dev *wdev;
7696
7697         if (state != NETLINK_URELEASE)
7698                 return NOTIFY_DONE;
7699
7700         rcu_read_lock();
7701
7702         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
7703                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
7704                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
7705                 if (rdev->ap_beacons_nlpid == notify->pid)
7706                         rdev->ap_beacons_nlpid = 0;
7707         }
7708
7709         rcu_read_unlock();
7710
7711         return NOTIFY_DONE;
7712 }
7713
7714 static struct notifier_block nl80211_netlink_notifier = {
7715         .notifier_call = nl80211_netlink_notify,
7716 };
7717
7718 /* initialisation/exit functions */
7719
7720 int nl80211_init(void)
7721 {
7722         int err;
7723
7724         err = genl_register_family_with_ops(&nl80211_fam,
7725                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
7726         if (err)
7727                 return err;
7728
7729         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
7730         if (err)
7731                 goto err_out;
7732
7733         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
7734         if (err)
7735                 goto err_out;
7736
7737         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
7738         if (err)
7739                 goto err_out;
7740
7741         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
7742         if (err)
7743                 goto err_out;
7744
7745 #ifdef CONFIG_NL80211_TESTMODE
7746         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
7747         if (err)
7748                 goto err_out;
7749 #endif
7750
7751         err = netlink_register_notifier(&nl80211_netlink_notifier);
7752         if (err)
7753                 goto err_out;
7754
7755         return 0;
7756  err_out:
7757         genl_unregister_family(&nl80211_fam);
7758         return err;
7759 }
7760
7761 void nl80211_exit(void)
7762 {
7763         netlink_unregister_notifier(&nl80211_netlink_notifier);
7764         genl_unregister_family(&nl80211_fam);
7765 }