net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* internal helper: get rdev and dev */
  50 static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs,
  51                                    struct cfg80211_registered_device **rdev,
  52                                    struct net_device **dev)
  53 {
  54         int ifindex;
  55
  56         if (!attrs[NL80211_ATTR_IFINDEX])
  57                 return -EINVAL;
  58
  59         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  60         *dev = dev_get_by_index(netns, ifindex);
  61         if (!*dev)
  62                 return -ENODEV;
  63
  64         *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  65         if (IS_ERR(*rdev)) {
  66                 dev_put(*dev);
  67                 return PTR_ERR(*rdev);
  68         }
  69
  70         return 0;
  71 }
  72
  73 /* policy for the attributes */
  74 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  75         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  77                                       .len = 20-1 },
  78         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  79         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  81         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  82         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  83         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  84         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  85         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  86
  87         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  88         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  89         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  90
  91         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
  92         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
  93
  94         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  95         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  96                                     .len = WLAN_MAX_KEY_LEN },
  97         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  98         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  99         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 100         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 101         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 102
 103         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 104         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 105         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 106                                        .len = IEEE80211_MAX_DATA_LEN },
 107         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 108                                        .len = IEEE80211_MAX_DATA_LEN },
 109         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 110         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 111         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 112         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 113                                                .len = NL80211_MAX_SUPP_RATES },
 114         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 115         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 116         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 117         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 118                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 119         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 120
 121         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 122         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 123
 124         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 125         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 126         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 127         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 128                                            .len = NL80211_MAX_SUPP_RATES },
 129         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 130
 131         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 132         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 133
 134         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 135
 136         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 137         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 138                               .len = IEEE80211_MAX_DATA_LEN },
 139         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 140         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 141
 142         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 143                                 .len = IEEE80211_MAX_SSID_LEN },
 144         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 145         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 146         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 147         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 149         [NL80211_ATTR_STA_FLAGS2] = {
 150                 .len = sizeof(struct nl80211_sta_flag_update),
 151         },
 152         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 153         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 154         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 155         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 156         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 157         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 158         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 159         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 160         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 161                                  .len = WLAN_PMKID_LEN },
 162         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 163         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 164         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 165         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 166                                  .len = IEEE80211_MAX_DATA_LEN },
 167         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 168         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 170         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 171         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 172         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 174         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 175         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 176         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 178         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 179         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 180         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 181         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 182         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 183         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 184         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 185         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 186         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 187                                          .len = IEEE80211_MAX_DATA_LEN },
 188         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 189                                          .len = IEEE80211_MAX_DATA_LEN },
 190         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 191         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 192         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 193         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 194         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 195         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 196         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 197         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 198         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 199         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 200                                       .len = IEEE80211_MAX_DATA_LEN },
 201         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 202         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 203         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 204                 .len = NL80211_HT_CAPABILITY_LEN
 205         },
 206         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 207         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 208         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 209 };
 210
 211 /* policy for the key attributes */
 212 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 213         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 214         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 215         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 216         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 217         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 218         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 219         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 220         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 221 };
 222
 223 /* policy for the key default flags */
 224 static const struct nla_policy
 225 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 226         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 227         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 228 };
 229
 230 /* policy for WoWLAN attributes */
 231 static const struct nla_policy
 232 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 233         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 234         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 235         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 236         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 237         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 238         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 239         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 240         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 241 };
 242
 243 /* policy for GTK rekey offload attributes */
 244 static const struct nla_policy
 245 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 246         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 247         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 248         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 249 };
 250
 251 static const struct nla_policy
 252 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 253         [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
 254                                                  .len = IEEE80211_MAX_SSID_LEN },
 255 };
 256
 257 /* ifidx get helper */
 258 static int nl80211_get_ifidx(struct netlink_callback *cb)
 259 {
 260         int res;
 261
 262         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 263                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 264                           nl80211_policy);
 265         if (res)
 266                 return res;
 267
 268         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 269                 return -EINVAL;
 270
 271         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 272         if (!res)
 273                 return -EINVAL;
 274         return res;
 275 }
 276
 277 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 278                                        struct netlink_callback *cb,
 279                                        struct cfg80211_registered_device **rdev,
 280                                        struct net_device **dev)
 281 {
 282         int ifidx = cb->args[0];
 283         int err;
 284
 285         if (!ifidx)
 286                 ifidx = nl80211_get_ifidx(cb);
 287         if (ifidx < 0)
 288                 return ifidx;
 289
 290         cb->args[0] = ifidx;
 291
 292         rtnl_lock();
 293
 294         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 295         if (!*dev) {
 296                 err = -ENODEV;
 297                 goto out_rtnl;
 298         }
 299
 300         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 301         if (IS_ERR(*rdev)) {
 302                 err = PTR_ERR(*rdev);
 303                 goto out_rtnl;
 304         }
 305
 306         return 0;
 307  out_rtnl:
 308         rtnl_unlock();
 309         return err;
 310 }
 311
 312 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 313 {
 314         cfg80211_unlock_rdev(rdev);
 315         rtnl_unlock();
 316 }
 317
 318 /* IE validation */
 319 static bool is_valid_ie_attr(const struct nlattr *attr)
 320 {
 321         const u8 *pos;
 322         int len;
 323
 324         if (!attr)
 325                 return true;
 326
 327         pos = nla_data(attr);
 328         len = nla_len(attr);
 329
 330         while (len) {
 331                 u8 elemlen;
 332
 333                 if (len < 2)
 334                         return false;
 335                 len -= 2;
 336
 337                 elemlen = pos[1];
 338                 if (elemlen > len)
 339                         return false;
 340
 341                 len -= elemlen;
 342                 pos += 2 + elemlen;
 343         }
 344
 345         return true;
 346 }
 347
 348 /* message building helper */
 349 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 350                                    int flags, u8 cmd)
 351 {
 352         /* since there is no private header just add the generic one */
 353         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 354 }
 355
 356 static int nl80211_msg_put_channel(struct sk_buff *msg,
 357                                    struct ieee80211_channel *chan)
 358 {
 359         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 360                         chan->center_freq))
 361                 goto nla_put_failure;
 362
 363         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 364             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 365                 goto nla_put_failure;
 366         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 367             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 368                 goto nla_put_failure;
 369         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 370             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 371                 goto nla_put_failure;
 372         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 373             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 374                 goto nla_put_failure;
 375
 376         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 377                         DBM_TO_MBM(chan->max_power)))
 378                 goto nla_put_failure;
 379
 380         return 0;
 381
 382  nla_put_failure:
 383         return -ENOBUFS;
 384 }
 385
 386 /* netlink command implementations */
 387
 388 struct key_parse {
 389         struct key_params p;
 390         int idx;
 391         int type;
 392         bool def, defmgmt;
 393         bool def_uni, def_multi;
 394 };
 395
 396 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 397 {
 398         struct nlattr *tb[NL80211_KEY_MAX + 1];
 399         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 400                                    nl80211_key_policy);
 401         if (err)
 402                 return err;
 403
 404         k->def = !!tb[NL80211_KEY_DEFAULT];
 405         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 406
 407         if (k->def) {
 408                 k->def_uni = true;
 409                 k->def_multi = true;
 410         }
 411         if (k->defmgmt)
 412                 k->def_multi = true;
 413
 414         if (tb[NL80211_KEY_IDX])
 415                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 416
 417         if (tb[NL80211_KEY_DATA]) {
 418                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 419                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 420         }
 421
 422         if (tb[NL80211_KEY_SEQ]) {
 423                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 424                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 425         }
 426
 427         if (tb[NL80211_KEY_CIPHER])
 428                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 429
 430         if (tb[NL80211_KEY_TYPE]) {
 431                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 432                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 433                         return -EINVAL;
 434         }
 435
 436         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 437                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 438                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 439                                        tb[NL80211_KEY_DEFAULT_TYPES],
 440                                        nl80211_key_default_policy);
 441                 if (err)
 442                         return err;
 443
 444                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 445                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 446         }
 447
 448         return 0;
 449 }
 450
 451 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 452 {
 453         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 454                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 455                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 456         }
 457
 458         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 459                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 460                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 461         }
 462
 463         if (info->attrs[NL80211_ATTR_KEY_IDX])
 464                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 465
 466         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 467                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 468
 469         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 470         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 471
 472         if (k->def) {
 473                 k->def_uni = true;
 474                 k->def_multi = true;
 475         }
 476         if (k->defmgmt)
 477                 k->def_multi = true;
 478
 479         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 480                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 481                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 482                         return -EINVAL;
 483         }
 484
 485         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 486                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 487                 int err = nla_parse_nested(
 488                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 489                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 490                                 nl80211_key_default_policy);
 491                 if (err)
 492                         return err;
 493
 494                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 495                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 496         }
 497
 498         return 0;
 499 }
 500
 501 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 502 {
 503         int err;
 504
 505         memset(k, 0, sizeof(*k));
 506         k->idx = -1;
 507         k->type = -1;
 508
 509         if (info->attrs[NL80211_ATTR_KEY])
 510                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 511         else
 512                 err = nl80211_parse_key_old(info, k);
 513
 514         if (err)
 515                 return err;
 516
 517         if (k->def && k->defmgmt)
 518                 return -EINVAL;
 519
 520         if (k->defmgmt) {
 521                 if (k->def_uni || !k->def_multi)
 522                         return -EINVAL;
 523         }
 524
 525         if (k->idx != -1) {
 526                 if (k->defmgmt) {
 527                         if (k->idx < 4 || k->idx > 5)
 528                                 return -EINVAL;
 529                 } else if (k->def) {
 530                         if (k->idx < 0 || k->idx > 3)
 531                                 return -EINVAL;
 532                 } else {
 533                         if (k->idx < 0 || k->idx > 5)
 534                                 return -EINVAL;
 535                 }
 536         }
 537
 538         return 0;
 539 }
 540
 541 static struct cfg80211_cached_keys *
 542 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 543                        struct nlattr *keys)
 544 {
 545         struct key_parse parse;
 546         struct nlattr *key;
 547         struct cfg80211_cached_keys *result;
 548         int rem, err, def = 0;
 549
 550         result = kzalloc(sizeof(*result), GFP_KERNEL);
 551         if (!result)
 552                 return ERR_PTR(-ENOMEM);
 553
 554         result->def = -1;
 555         result->defmgmt = -1;
 556
 557         nla_for_each_nested(key, keys, rem) {
 558                 memset(&parse, 0, sizeof(parse));
 559                 parse.idx = -1;
 560
 561                 err = nl80211_parse_key_new(key, &parse);
 562                 if (err)
 563                         goto error;
 564                 err = -EINVAL;
 565                 if (!parse.p.key)
 566                         goto error;
 567                 if (parse.idx < 0 || parse.idx > 4)
 568                         goto error;
 569                 if (parse.def) {
 570                         if (def)
 571                                 goto error;
 572                         def = 1;
 573                         result->def = parse.idx;
 574                         if (!parse.def_uni || !parse.def_multi)
 575                                 goto error;
 576                 } else if (parse.defmgmt)
 577                         goto error;
 578                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 579                                                      parse.idx, false, NULL);
 580                 if (err)
 581                         goto error;
 582                 result->params[parse.idx].cipher = parse.p.cipher;
 583                 result->params[parse.idx].key_len = parse.p.key_len;
 584                 result->params[parse.idx].key = result->data[parse.idx];
 585                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 586         }
 587
 588         return result;
 589  error:
 590         kfree(result);
 591         return ERR_PTR(err);
 592 }
 593
 594 static int nl80211_key_allowed(struct wireless_dev *wdev)
 595 {
 596         ASSERT_WDEV_LOCK(wdev);
 597
 598         switch (wdev->iftype) {
 599         case NL80211_IFTYPE_AP:
 600         case NL80211_IFTYPE_AP_VLAN:
 601         case NL80211_IFTYPE_P2P_GO:
 602         case NL80211_IFTYPE_MESH_POINT:
 603                 break;
 604         case NL80211_IFTYPE_ADHOC:
 605                 if (!wdev->current_bss)
 606                         return -ENOLINK;
 607                 break;
 608         case NL80211_IFTYPE_STATION:
 609         case NL80211_IFTYPE_P2P_CLIENT:
 610                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 611                         return -ENOLINK;
 612                 break;
 613         default:
 614                 return -EINVAL;
 615         }
 616
 617         return 0;
 618 }
 619
 620 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 621 {
 622         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 623         int i;
 624
 625         if (!nl_modes)
 626                 goto nla_put_failure;
 627
 628         i = 0;
 629         while (ifmodes) {
 630                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 631                         goto nla_put_failure;
 632                 ifmodes >>= 1;
 633                 i++;
 634         }
 635
 636         nla_nest_end(msg, nl_modes);
 637         return 0;
 638
 639 nla_put_failure:
 640         return -ENOBUFS;
 641 }
 642
 643 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 644                                           struct sk_buff *msg)
 645 {
 646         struct nlattr *nl_combis;
 647         int i, j;
 648
 649         nl_combis = nla_nest_start(msg,
 650                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 651         if (!nl_combis)
 652                 goto nla_put_failure;
 653
 654         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 655                 const struct ieee80211_iface_combination *c;
 656                 struct nlattr *nl_combi, *nl_limits;
 657
 658                 c = &wiphy->iface_combinations[i];
 659
 660                 nl_combi = nla_nest_start(msg, i + 1);
 661                 if (!nl_combi)
 662                         goto nla_put_failure;
 663
 664                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 665                 if (!nl_limits)
 666                         goto nla_put_failure;
 667
 668                 for (j = 0; j < c->n_limits; j++) {
 669                         struct nlattr *nl_limit;
 670
 671                         nl_limit = nla_nest_start(msg, j + 1);
 672                         if (!nl_limit)
 673                                 goto nla_put_failure;
 674                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 675                                         c->limits[j].max))
 676                                 goto nla_put_failure;
 677                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 678                                                 c->limits[j].types))
 679                                 goto nla_put_failure;
 680                         nla_nest_end(msg, nl_limit);
 681                 }
 682
 683                 nla_nest_end(msg, nl_limits);
 684
 685                 if (c->beacon_int_infra_match &&
 686                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 687                         goto nla_put_failure;
 688                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 689                                 c->num_different_channels) ||
 690                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 691                                 c->max_interfaces))
 692                         goto nla_put_failure;
 693
 694                 nla_nest_end(msg, nl_combi);
 695         }
 696
 697         nla_nest_end(msg, nl_combis);
 698
 699         return 0;
 700 nla_put_failure:
 701         return -ENOBUFS;
 702 }
 703
 704 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 705                               struct cfg80211_registered_device *dev)
 706 {
 707         void *hdr;
 708         struct nlattr *nl_bands, *nl_band;
 709         struct nlattr *nl_freqs, *nl_freq;
 710         struct nlattr *nl_rates, *nl_rate;
 711         struct nlattr *nl_cmds;
 712         enum ieee80211_band band;
 713         struct ieee80211_channel *chan;
 714         struct ieee80211_rate *rate;
 715         int i;
 716         const struct ieee80211_txrx_stypes *mgmt_stypes =
 717                                 dev->wiphy.mgmt_stypes;
 718
 719         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 720         if (!hdr)
 721                 return -1;
 722
 723         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 724             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 725             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 726                         cfg80211_rdev_list_generation) ||
 727             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 728                        dev->wiphy.retry_short) ||
 729             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 730                        dev->wiphy.retry_long) ||
 731             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 732                         dev->wiphy.frag_threshold) ||
 733             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 734                         dev->wiphy.rts_threshold) ||
 735             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 736                        dev->wiphy.coverage_class) ||
 737             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 738                        dev->wiphy.max_scan_ssids) ||
 739             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 740                        dev->wiphy.max_sched_scan_ssids) ||
 741             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 742                         dev->wiphy.max_scan_ie_len) ||
 743             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 744                         dev->wiphy.max_sched_scan_ie_len) ||
 745             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 746                        dev->wiphy.max_match_sets))
 747                 goto nla_put_failure;
 748
 749         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 750             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 751                 goto nla_put_failure;
 752         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 753             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 754                 goto nla_put_failure;
 755         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 756             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 757                 goto nla_put_failure;
 758         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 759             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 760                 goto nla_put_failure;
 761         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 762             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 763                 goto nla_put_failure;
 764         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 765             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 766                 goto nla_put_failure;
 767
 768         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 769                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 770                     dev->wiphy.cipher_suites))
 771                 goto nla_put_failure;
 772
 773         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 774                        dev->wiphy.max_num_pmkids))
 775                 goto nla_put_failure;
 776
 777         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 778             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 779                 goto nla_put_failure;
 780
 781         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 782                         dev->wiphy.available_antennas_tx) ||
 783             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 784                         dev->wiphy.available_antennas_rx))
 785                 goto nla_put_failure;
 786
 787         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 788             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 789                         dev->wiphy.probe_resp_offload))
 790                 goto nla_put_failure;
 791
 792         if ((dev->wiphy.available_antennas_tx ||
 793              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 794                 u32 tx_ant = 0, rx_ant = 0;
 795                 int res;
 796                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 797                 if (!res) {
 798                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 799                                         tx_ant) ||
 800                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 801                                         rx_ant))
 802                                 goto nla_put_failure;
 803                 }
 804         }
 805
 806         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 807                                 dev->wiphy.interface_modes))
 808                 goto nla_put_failure;
 809
 810         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 811         if (!nl_bands)
 812                 goto nla_put_failure;
 813
 814         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 815                 if (!dev->wiphy.bands[band])
 816                         continue;
 817
 818                 nl_band = nla_nest_start(msg, band);
 819                 if (!nl_band)
 820                         goto nla_put_failure;
 821
 822                 /* add HT info */
 823                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 824                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 825                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 826                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 827                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 828                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 829                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 830                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 831                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 832                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 833                         goto nla_put_failure;
 834
 835                 /* add frequencies */
 836                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 837                 if (!nl_freqs)
 838                         goto nla_put_failure;
 839
 840                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 841                         nl_freq = nla_nest_start(msg, i);
 842                         if (!nl_freq)
 843                                 goto nla_put_failure;
 844
 845                         chan = &dev->wiphy.bands[band]->channels[i];
 846
 847                         if (nl80211_msg_put_channel(msg, chan))
 848                                 goto nla_put_failure;
 849
 850                         nla_nest_end(msg, nl_freq);
 851                 }
 852
 853                 nla_nest_end(msg, nl_freqs);
 854
 855                 /* add bitrates */
 856                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 857                 if (!nl_rates)
 858                         goto nla_put_failure;
 859
 860                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 861                         nl_rate = nla_nest_start(msg, i);
 862                         if (!nl_rate)
 863                                 goto nla_put_failure;
 864
 865                         rate = &dev->wiphy.bands[band]->bitrates[i];
 866                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 867                                         rate->bitrate))
 868                                 goto nla_put_failure;
 869                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 870                             nla_put_flag(msg,
 871                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 872                                 goto nla_put_failure;
 873
 874                         nla_nest_end(msg, nl_rate);
 875                 }
 876
 877                 nla_nest_end(msg, nl_rates);
 878
 879                 nla_nest_end(msg, nl_band);
 880         }
 881         nla_nest_end(msg, nl_bands);
 882
 883         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 884         if (!nl_cmds)
 885                 goto nla_put_failure;
 886
 887         i = 0;
 888 #define CMD(op, n)                                              \
 889          do {                                                   \
 890                 if (dev->ops->op) {                             \
 891                         i++;                                    \
 892                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 893                                 goto nla_put_failure;           \
 894                 }                                               \
 895         } while (0)
 896
 897         CMD(add_virtual_intf, NEW_INTERFACE);
 898         CMD(change_virtual_intf, SET_INTERFACE);
 899         CMD(add_key, NEW_KEY);
 900         CMD(start_ap, START_AP);
 901         CMD(add_station, NEW_STATION);
 902         CMD(add_mpath, NEW_MPATH);
 903         CMD(update_mesh_config, SET_MESH_CONFIG);
 904         CMD(change_bss, SET_BSS);
 905         CMD(auth, AUTHENTICATE);
 906         CMD(assoc, ASSOCIATE);
 907         CMD(deauth, DEAUTHENTICATE);
 908         CMD(disassoc, DISASSOCIATE);
 909         CMD(join_ibss, JOIN_IBSS);
 910         CMD(join_mesh, JOIN_MESH);
 911         CMD(set_pmksa, SET_PMKSA);
 912         CMD(del_pmksa, DEL_PMKSA);
 913         CMD(flush_pmksa, FLUSH_PMKSA);
 914         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 915                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 916         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 917         CMD(mgmt_tx, FRAME);
 918         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 919         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 920                 i++;
 921                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
 922                         goto nla_put_failure;
 923         }
 924         CMD(set_channel, SET_CHANNEL);
 925         CMD(set_wds_peer, SET_WDS_PEER);
 926         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 927                 CMD(tdls_mgmt, TDLS_MGMT);
 928                 CMD(tdls_oper, TDLS_OPER);
 929         }
 930         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 931                 CMD(sched_scan_start, START_SCHED_SCAN);
 932         CMD(probe_client, PROBE_CLIENT);
 933         CMD(set_noack_map, SET_NOACK_MAP);
 934         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 935                 i++;
 936                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
 937                         goto nla_put_failure;
 938         }
 939
 940 #ifdef CONFIG_NL80211_TESTMODE
 941         CMD(testmode_cmd, TESTMODE);
 942 #endif
 943
 944 #undef CMD
 945
 946         if (dev->ops->connect || dev->ops->auth) {
 947                 i++;
 948                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
 949                         goto nla_put_failure;
 950         }
 951
 952         if (dev->ops->disconnect || dev->ops->deauth) {
 953                 i++;
 954                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
 955                         goto nla_put_failure;
 956         }
 957
 958         nla_nest_end(msg, nl_cmds);
 959
 960         if (dev->ops->remain_on_channel &&
 961             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
 962             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 963                         dev->wiphy.max_remain_on_channel_duration))
 964                 goto nla_put_failure;
 965
 966         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
 967             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
 968                 goto nla_put_failure;
 969
 970         if (mgmt_stypes) {
 971                 u16 stypes;
 972                 struct nlattr *nl_ftypes, *nl_ifs;
 973                 enum nl80211_iftype ift;
 974
 975                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 976                 if (!nl_ifs)
 977                         goto nla_put_failure;
 978
 979                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 980                         nl_ftypes = nla_nest_start(msg, ift);
 981                         if (!nl_ftypes)
 982                                 goto nla_put_failure;
 983                         i = 0;
 984                         stypes = mgmt_stypes[ift].tx;
 985                         while (stypes) {
 986                                 if ((stypes & 1) &&
 987                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
 988                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
 989                                         goto nla_put_failure;
 990                                 stypes >>= 1;
 991                                 i++;
 992                         }
 993                         nla_nest_end(msg, nl_ftypes);
 994                 }
 995
 996                 nla_nest_end(msg, nl_ifs);
 997
 998                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 999                 if (!nl_ifs)
1000                         goto nla_put_failure;
1001
1002                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1003                         nl_ftypes = nla_nest_start(msg, ift);
1004                         if (!nl_ftypes)
1005                                 goto nla_put_failure;
1006                         i = 0;
1007                         stypes = mgmt_stypes[ift].rx;
1008                         while (stypes) {
1009                                 if ((stypes & 1) &&
1010                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1011                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1012                                         goto nla_put_failure;
1013                                 stypes >>= 1;
1014                                 i++;
1015                         }
1016                         nla_nest_end(msg, nl_ftypes);
1017                 }
1018                 nla_nest_end(msg, nl_ifs);
1019         }
1020
1021         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1022                 struct nlattr *nl_wowlan;
1023
1024                 nl_wowlan = nla_nest_start(msg,
1025                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1026                 if (!nl_wowlan)
1027                         goto nla_put_failure;
1028
1029                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1030                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1031                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1032                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1033                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1034                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1035                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1036                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1037                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1038                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1039                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1040                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1041                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1042                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1043                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1044                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1045                     goto nla_put_failure;
1046                 if (dev->wiphy.wowlan.n_patterns) {
1047                         struct nl80211_wowlan_pattern_support pat = {
1048                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1049                                 .min_pattern_len =
1050                                         dev->wiphy.wowlan.pattern_min_len,
1051                                 .max_pattern_len =
1052                                         dev->wiphy.wowlan.pattern_max_len,
1053                         };
1054                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1055                                     sizeof(pat), &pat))
1056                                 goto nla_put_failure;
1057                 }
1058
1059                 nla_nest_end(msg, nl_wowlan);
1060         }
1061
1062         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1063                                 dev->wiphy.software_iftypes))
1064                 goto nla_put_failure;
1065
1066         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1067                 goto nla_put_failure;
1068
1069         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1070             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1071                         dev->wiphy.ap_sme_capa))
1072                 goto nla_put_failure;
1073
1074         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1075                         dev->wiphy.features))
1076                 goto nla_put_failure;
1077
1078         if (dev->wiphy.ht_capa_mod_mask &&
1079             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1080                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1081                     dev->wiphy.ht_capa_mod_mask))
1082                 goto nla_put_failure;
1083
1084         return genlmsg_end(msg, hdr);
1085
1086  nla_put_failure:
1087         genlmsg_cancel(msg, hdr);
1088         return -EMSGSIZE;
1089 }
1090
1091 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1092 {
1093         int idx = 0;
1094         int start = cb->args[0];
1095         struct cfg80211_registered_device *dev;
1096
1097         mutex_lock(&cfg80211_mutex);
1098         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1099                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1100                         continue;
1101                 if (++idx <= start)
1102                         continue;
1103                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1104                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1105                                        dev) < 0) {
1106                         idx--;
1107                         break;
1108                 }
1109         }
1110         mutex_unlock(&cfg80211_mutex);
1111
1112         cb->args[0] = idx;
1113
1114         return skb->len;
1115 }
1116
1117 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1118 {
1119         struct sk_buff *msg;
1120         struct cfg80211_registered_device *dev = info->user_ptr[0];
1121
1122         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1123         if (!msg)
1124                 return -ENOMEM;
1125
1126         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1127                 nlmsg_free(msg);
1128                 return -ENOBUFS;
1129         }
1130
1131         return genlmsg_reply(msg, info);
1132 }
1133
1134 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1135         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1136         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1137         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1138         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1139         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1140 };
1141
1142 static int parse_txq_params(struct nlattr *tb[],
1143                             struct ieee80211_txq_params *txq_params)
1144 {
1145         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1146             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1147             !tb[NL80211_TXQ_ATTR_AIFS])
1148                 return -EINVAL;
1149
1150         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1151         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1152         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1153         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1154         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1155
1156         if (txq_params->ac >= NL80211_NUM_ACS)
1157                 return -EINVAL;
1158
1159         return 0;
1160 }
1161
1162 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1163 {
1164         /*
1165          * You can only set the channel explicitly for AP, mesh
1166          * and WDS type interfaces; all others have their channel
1167          * managed via their respective "establish a connection"
1168          * command (connect, join, ...)
1169          *
1170          * Monitors are special as they are normally slaved to
1171          * whatever else is going on, so they behave as though
1172          * you tried setting the wiphy channel itself.
1173          */
1174         return !wdev ||
1175                 wdev->iftype == NL80211_IFTYPE_AP ||
1176                 wdev->iftype == NL80211_IFTYPE_WDS ||
1177                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1178                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1179                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1180 }
1181
1182 static bool nl80211_valid_channel_type(struct genl_info *info,
1183                                        enum nl80211_channel_type *channel_type)
1184 {
1185         enum nl80211_channel_type tmp;
1186
1187         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1188                 return false;
1189
1190         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1191         if (tmp != NL80211_CHAN_NO_HT &&
1192             tmp != NL80211_CHAN_HT20 &&
1193             tmp != NL80211_CHAN_HT40PLUS &&
1194             tmp != NL80211_CHAN_HT40MINUS)
1195                 return false;
1196
1197         if (channel_type)
1198                 *channel_type = tmp;
1199
1200         return true;
1201 }
1202
1203 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1204                                  struct wireless_dev *wdev,
1205                                  struct genl_info *info)
1206 {
1207         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1208         u32 freq;
1209         int result;
1210
1211         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1212                 return -EINVAL;
1213
1214         if (!nl80211_can_set_dev_channel(wdev))
1215                 return -EOPNOTSUPP;
1216
1217         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1218             !nl80211_valid_channel_type(info, &channel_type))
1219                 return -EINVAL;
1220
1221         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1222
1223         mutex_lock(&rdev->devlist_mtx);
1224         if (wdev) {
1225                 wdev_lock(wdev);
1226                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1227                 wdev_unlock(wdev);
1228         } else {
1229                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1230         }
1231         mutex_unlock(&rdev->devlist_mtx);
1232
1233         return result;
1234 }
1235
1236 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1237 {
1238         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1239         struct net_device *netdev = info->user_ptr[1];
1240
1241         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1242 }
1243
1244 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1245 {
1246         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1247         struct net_device *dev = info->user_ptr[1];
1248         struct wireless_dev *wdev = dev->ieee80211_ptr;
1249         const u8 *bssid;
1250
1251         if (!info->attrs[NL80211_ATTR_MAC])
1252                 return -EINVAL;
1253
1254         if (netif_running(dev))
1255                 return -EBUSY;
1256
1257         if (!rdev->ops->set_wds_peer)
1258                 return -EOPNOTSUPP;
1259
1260         if (wdev->iftype != NL80211_IFTYPE_WDS)
1261                 return -EOPNOTSUPP;
1262
1263         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1264         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1265 }
1266
1267
1268 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1269 {
1270         struct cfg80211_registered_device *rdev;
1271         struct net_device *netdev = NULL;
1272         struct wireless_dev *wdev;
1273         int result = 0, rem_txq_params = 0;
1274         struct nlattr *nl_txq_params;
1275         u32 changed;
1276         u8 retry_short = 0, retry_long = 0;
1277         u32 frag_threshold = 0, rts_threshold = 0;
1278         u8 coverage_class = 0;
1279
1280         /*
1281          * Try to find the wiphy and netdev. Normally this
1282          * function shouldn't need the netdev, but this is
1283          * done for backward compatibility -- previously
1284          * setting the channel was done per wiphy, but now
1285          * it is per netdev. Previous userland like hostapd
1286          * also passed a netdev to set_wiphy, so that it is
1287          * possible to let that go to the right netdev!
1288          */
1289         mutex_lock(&cfg80211_mutex);
1290
1291         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1292                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1293
1294                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1295                 if (netdev && netdev->ieee80211_ptr) {
1296                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1297                         mutex_lock(&rdev->mtx);
1298                 } else
1299                         netdev = NULL;
1300         }
1301
1302         if (!netdev) {
1303                 rdev = __cfg80211_rdev_from_info(info);
1304                 if (IS_ERR(rdev)) {
1305                         mutex_unlock(&cfg80211_mutex);
1306                         return PTR_ERR(rdev);
1307                 }
1308                 wdev = NULL;
1309                 netdev = NULL;
1310                 result = 0;
1311
1312                 mutex_lock(&rdev->mtx);
1313         } else if (netif_running(netdev) &&
1314                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1315                 wdev = netdev->ieee80211_ptr;
1316         else
1317                 wdev = NULL;
1318
1319         /*
1320          * end workaround code, by now the rdev is available
1321          * and locked, and wdev may or may not be NULL.
1322          */
1323
1324         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1325                 result = cfg80211_dev_rename(
1326                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1327
1328         mutex_unlock(&cfg80211_mutex);
1329
1330         if (result)
1331                 goto bad_res;
1332
1333         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1334                 struct ieee80211_txq_params txq_params;
1335                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1336
1337                 if (!rdev->ops->set_txq_params) {
1338                         result = -EOPNOTSUPP;
1339                         goto bad_res;
1340                 }
1341
1342                 if (!netdev) {
1343                         result = -EINVAL;
1344                         goto bad_res;
1345                 }
1346
1347                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1348                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1349                         result = -EINVAL;
1350                         goto bad_res;
1351                 }
1352
1353                 if (!netif_running(netdev)) {
1354                         result = -ENETDOWN;
1355                         goto bad_res;
1356                 }
1357
1358                 nla_for_each_nested(nl_txq_params,
1359                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1360                                     rem_txq_params) {
1361                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1362                                   nla_data(nl_txq_params),
1363                                   nla_len(nl_txq_params),
1364                                   txq_params_policy);
1365                         result = parse_txq_params(tb, &txq_params);
1366                         if (result)
1367                                 goto bad_res;
1368
1369                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1370                                                            netdev,
1371                                                            &txq_params);
1372                         if (result)
1373                                 goto bad_res;
1374                 }
1375         }
1376
1377         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1378                 result = __nl80211_set_channel(rdev, wdev, info);
1379                 if (result)
1380                         goto bad_res;
1381         }
1382
1383         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1384                 enum nl80211_tx_power_setting type;
1385                 int idx, mbm = 0;
1386
1387                 if (!rdev->ops->set_tx_power) {
1388                         result = -EOPNOTSUPP;
1389                         goto bad_res;
1390                 }
1391
1392                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1393                 type = nla_get_u32(info->attrs[idx]);
1394
1395                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1396                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1397                         result = -EINVAL;
1398                         goto bad_res;
1399                 }
1400
1401                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1402                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1403                         mbm = nla_get_u32(info->attrs[idx]);
1404                 }
1405
1406                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1407                 if (result)
1408                         goto bad_res;
1409         }
1410
1411         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1412             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1413                 u32 tx_ant, rx_ant;
1414                 if ((!rdev->wiphy.available_antennas_tx &&
1415                      !rdev->wiphy.available_antennas_rx) ||
1416                     !rdev->ops->set_antenna) {
1417                         result = -EOPNOTSUPP;
1418                         goto bad_res;
1419                 }
1420
1421                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1422                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1423
1424                 /* reject antenna configurations which don't match the
1425                  * available antenna masks, except for the "all" mask */
1426                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1427                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1428                         result = -EINVAL;
1429                         goto bad_res;
1430                 }
1431
1432                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1433                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1434
1435                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1436                 if (result)
1437                         goto bad_res;
1438         }
1439
1440         changed = 0;
1441
1442         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1443                 retry_short = nla_get_u8(
1444                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1445                 if (retry_short == 0) {
1446                         result = -EINVAL;
1447                         goto bad_res;
1448                 }
1449                 changed |= WIPHY_PARAM_RETRY_SHORT;
1450         }
1451
1452         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1453                 retry_long = nla_get_u8(
1454                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1455                 if (retry_long == 0) {
1456                         result = -EINVAL;
1457                         goto bad_res;
1458                 }
1459                 changed |= WIPHY_PARAM_RETRY_LONG;
1460         }
1461
1462         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1463                 frag_threshold = nla_get_u32(
1464                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1465                 if (frag_threshold < 256) {
1466                         result = -EINVAL;
1467                         goto bad_res;
1468                 }
1469                 if (frag_threshold != (u32) -1) {
1470                         /*
1471                          * Fragments (apart from the last one) are required to
1472                          * have even length. Make the fragmentation code
1473                          * simpler by stripping LSB should someone try to use
1474                          * odd threshold value.
1475                          */
1476                         frag_threshold &= ~0x1;
1477                 }
1478                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1479         }
1480
1481         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1482                 rts_threshold = nla_get_u32(
1483                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1484                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1485         }
1486
1487         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1488                 coverage_class = nla_get_u8(
1489                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1490                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1491         }
1492
1493         if (changed) {
1494                 u8 old_retry_short, old_retry_long;
1495                 u32 old_frag_threshold, old_rts_threshold;
1496                 u8 old_coverage_class;
1497
1498                 if (!rdev->ops->set_wiphy_params) {
1499                         result = -EOPNOTSUPP;
1500                         goto bad_res;
1501                 }
1502
1503                 old_retry_short = rdev->wiphy.retry_short;
1504                 old_retry_long = rdev->wiphy.retry_long;
1505                 old_frag_threshold = rdev->wiphy.frag_threshold;
1506                 old_rts_threshold = rdev->wiphy.rts_threshold;
1507                 old_coverage_class = rdev->wiphy.coverage_class;
1508
1509                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1510                         rdev->wiphy.retry_short = retry_short;
1511                 if (changed & WIPHY_PARAM_RETRY_LONG)
1512                         rdev->wiphy.retry_long = retry_long;
1513                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1514                         rdev->wiphy.frag_threshold = frag_threshold;
1515                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1516                         rdev->wiphy.rts_threshold = rts_threshold;
1517                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1518                         rdev->wiphy.coverage_class = coverage_class;
1519
1520                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1521                 if (result) {
1522                         rdev->wiphy.retry_short = old_retry_short;
1523                         rdev->wiphy.retry_long = old_retry_long;
1524                         rdev->wiphy.frag_threshold = old_frag_threshold;
1525                         rdev->wiphy.rts_threshold = old_rts_threshold;
1526                         rdev->wiphy.coverage_class = old_coverage_class;
1527                 }
1528         }
1529
1530  bad_res:
1531         mutex_unlock(&rdev->mtx);
1532         if (netdev)
1533                 dev_put(netdev);
1534         return result;
1535 }
1536
1537
1538 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1539                               struct cfg80211_registered_device *rdev,
1540                               struct net_device *dev)
1541 {
1542         void *hdr;
1543
1544         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1545         if (!hdr)
1546                 return -1;
1547
1548         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1549             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1550             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1551             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1552                         dev->ieee80211_ptr->iftype) ||
1553             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1554                         rdev->devlist_generation ^
1555                         (cfg80211_rdev_list_generation << 2)))
1556                 goto nla_put_failure;
1557
1558         if (rdev->ops->get_channel) {
1559                 struct ieee80211_channel *chan;
1560                 enum nl80211_channel_type channel_type;
1561
1562                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1563                 if (chan &&
1564                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1565                                     chan->center_freq) ||
1566                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1567                                     channel_type)))
1568                         goto nla_put_failure;
1569         }
1570
1571         return genlmsg_end(msg, hdr);
1572
1573  nla_put_failure:
1574         genlmsg_cancel(msg, hdr);
1575         return -EMSGSIZE;
1576 }
1577
1578 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1579 {
1580         int wp_idx = 0;
1581         int if_idx = 0;
1582         int wp_start = cb->args[0];
1583         int if_start = cb->args[1];
1584         struct cfg80211_registered_device *rdev;
1585         struct wireless_dev *wdev;
1586
1587         mutex_lock(&cfg80211_mutex);
1588         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1589                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1590                         continue;
1591                 if (wp_idx < wp_start) {
1592                         wp_idx++;
1593                         continue;
1594                 }
1595                 if_idx = 0;
1596
1597                 mutex_lock(&rdev->devlist_mtx);
1598                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1599                         if (if_idx < if_start) {
1600                                 if_idx++;
1601                                 continue;
1602                         }
1603                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1604                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1605                                                rdev, wdev->netdev) < 0) {
1606                                 mutex_unlock(&rdev->devlist_mtx);
1607                                 goto out;
1608                         }
1609                         if_idx++;
1610                 }
1611                 mutex_unlock(&rdev->devlist_mtx);
1612
1613                 wp_idx++;
1614         }
1615  out:
1616         mutex_unlock(&cfg80211_mutex);
1617
1618         cb->args[0] = wp_idx;
1619         cb->args[1] = if_idx;
1620
1621         return skb->len;
1622 }
1623
1624 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1625 {
1626         struct sk_buff *msg;
1627         struct cfg80211_registered_device *dev = info->user_ptr[0];
1628         struct net_device *netdev = info->user_ptr[1];
1629
1630         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1631         if (!msg)
1632                 return -ENOMEM;
1633
1634         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1635                                dev, netdev) < 0) {
1636                 nlmsg_free(msg);
1637                 return -ENOBUFS;
1638         }
1639
1640         return genlmsg_reply(msg, info);
1641 }
1642
1643 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1644         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1645         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1646         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1647         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1648         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1649 };
1650
1651 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1652 {
1653         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1654         int flag;
1655
1656         *mntrflags = 0;
1657
1658         if (!nla)
1659                 return -EINVAL;
1660
1661         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1662                              nla, mntr_flags_policy))
1663                 return -EINVAL;
1664
1665         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1666                 if (flags[flag])
1667                         *mntrflags |= (1<<flag);
1668
1669         return 0;
1670 }
1671
1672 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1673                                struct net_device *netdev, u8 use_4addr,
1674                                enum nl80211_iftype iftype)
1675 {
1676         if (!use_4addr) {
1677                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1678                         return -EBUSY;
1679                 return 0;
1680         }
1681
1682         switch (iftype) {
1683         case NL80211_IFTYPE_AP_VLAN:
1684                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1685                         return 0;
1686                 break;
1687         case NL80211_IFTYPE_STATION:
1688                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1689                         return 0;
1690                 break;
1691         default:
1692                 break;
1693         }
1694
1695         return -EOPNOTSUPP;
1696 }
1697
1698 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1699 {
1700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1701         struct vif_params params;
1702         int err;
1703         enum nl80211_iftype otype, ntype;
1704         struct net_device *dev = info->user_ptr[1];
1705         u32 _flags, *flags = NULL;
1706         bool change = false;
1707
1708         memset(&params, 0, sizeof(params));
1709
1710         otype = ntype = dev->ieee80211_ptr->iftype;
1711
1712         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1713                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1714                 if (otype != ntype)
1715                         change = true;
1716                 if (ntype > NL80211_IFTYPE_MAX)
1717                         return -EINVAL;
1718         }
1719
1720         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1721                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1722
1723                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1724                         return -EINVAL;
1725                 if (netif_running(dev))
1726                         return -EBUSY;
1727
1728                 wdev_lock(wdev);
1729                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1730                              IEEE80211_MAX_MESH_ID_LEN);
1731                 wdev->mesh_id_up_len =
1732                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1733                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1734                        wdev->mesh_id_up_len);
1735                 wdev_unlock(wdev);
1736         }
1737
1738         if (info->attrs[NL80211_ATTR_4ADDR]) {
1739                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1740                 change = true;
1741                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1742                 if (err)
1743                         return err;
1744         } else {
1745                 params.use_4addr = -1;
1746         }
1747
1748         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1749                 if (ntype != NL80211_IFTYPE_MONITOR)
1750                         return -EINVAL;
1751                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1752                                           &_flags);
1753                 if (err)
1754                         return err;
1755
1756                 flags = &_flags;
1757                 change = true;
1758         }
1759
1760         if (change)
1761                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1762         else
1763                 err = 0;
1764
1765         if (!err && params.use_4addr != -1)
1766                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1767
1768         return err;
1769 }
1770
1771 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1772 {
1773         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1774         struct vif_params params;
1775         struct net_device *dev;
1776         int err;
1777         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1778         u32 flags;
1779
1780         memset(&params, 0, sizeof(params));
1781
1782         if (!info->attrs[NL80211_ATTR_IFNAME])
1783                 return -EINVAL;
1784
1785         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1786                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1787                 if (type > NL80211_IFTYPE_MAX)
1788                         return -EINVAL;
1789         }
1790
1791         if (!rdev->ops->add_virtual_intf ||
1792             !(rdev->wiphy.interface_modes & (1 << type)))
1793                 return -EOPNOTSUPP;
1794
1795         if (info->attrs[NL80211_ATTR_4ADDR]) {
1796                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1797                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1798                 if (err)
1799                         return err;
1800         }
1801
1802         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1803                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1804                                   &flags);
1805         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1806                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1807                 type, err ? NULL : &flags, &params);
1808         if (IS_ERR(dev))
1809                 return PTR_ERR(dev);
1810
1811         if (type == NL80211_IFTYPE_MESH_POINT &&
1812             info->attrs[NL80211_ATTR_MESH_ID]) {
1813                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1814
1815                 wdev_lock(wdev);
1816                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1817                              IEEE80211_MAX_MESH_ID_LEN);
1818                 wdev->mesh_id_up_len =
1819                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1820                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1821                        wdev->mesh_id_up_len);
1822                 wdev_unlock(wdev);
1823         }
1824
1825         return 0;
1826 }
1827
1828 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1829 {
1830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1831         struct net_device *dev = info->user_ptr[1];
1832
1833         if (!rdev->ops->del_virtual_intf)
1834                 return -EOPNOTSUPP;
1835
1836         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1837 }
1838
1839 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1840 {
1841         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1842         struct net_device *dev = info->user_ptr[1];
1843         u16 noack_map;
1844
1845         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1846                 return -EINVAL;
1847
1848         if (!rdev->ops->set_noack_map)
1849                 return -EOPNOTSUPP;
1850
1851         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1852
1853         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1854 }
1855
1856 struct get_key_cookie {
1857         struct sk_buff *msg;
1858         int error;
1859         int idx;
1860 };
1861
1862 static void get_key_callback(void *c, struct key_params *params)
1863 {
1864         struct nlattr *key;
1865         struct get_key_cookie *cookie = c;
1866
1867         if ((params->key &&
1868              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1869                      params->key_len, params->key)) ||
1870             (params->seq &&
1871              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1872                      params->seq_len, params->seq)) ||
1873             (params->cipher &&
1874              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1875                          params->cipher)))
1876                 goto nla_put_failure;
1877
1878         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1879         if (!key)
1880                 goto nla_put_failure;
1881
1882         if ((params->key &&
1883              nla_put(cookie->msg, NL80211_KEY_DATA,
1884                      params->key_len, params->key)) ||
1885             (params->seq &&
1886              nla_put(cookie->msg, NL80211_KEY_SEQ,
1887                      params->seq_len, params->seq)) ||
1888             (params->cipher &&
1889              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
1890                          params->cipher)))
1891                 goto nla_put_failure;
1892
1893         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
1894                 goto nla_put_failure;
1895
1896         nla_nest_end(cookie->msg, key);
1897
1898         return;
1899  nla_put_failure:
1900         cookie->error = 1;
1901 }
1902
1903 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1904 {
1905         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1906         int err;
1907         struct net_device *dev = info->user_ptr[1];
1908         u8 key_idx = 0;
1909         const u8 *mac_addr = NULL;
1910         bool pairwise;
1911         struct get_key_cookie cookie = {
1912                 .error = 0,
1913         };
1914         void *hdr;
1915         struct sk_buff *msg;
1916
1917         if (info->attrs[NL80211_ATTR_KEY_IDX])
1918                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1919
1920         if (key_idx > 5)
1921                 return -EINVAL;
1922
1923         if (info->attrs[NL80211_ATTR_MAC])
1924                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1925
1926         pairwise = !!mac_addr;
1927         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1928                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1929                 if (kt >= NUM_NL80211_KEYTYPES)
1930                         return -EINVAL;
1931                 if (kt != NL80211_KEYTYPE_GROUP &&
1932                     kt != NL80211_KEYTYPE_PAIRWISE)
1933                         return -EINVAL;
1934                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1935         }
1936
1937         if (!rdev->ops->get_key)
1938                 return -EOPNOTSUPP;
1939
1940         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1941         if (!msg)
1942                 return -ENOMEM;
1943
1944         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1945                              NL80211_CMD_NEW_KEY);
1946         if (IS_ERR(hdr))
1947                 return PTR_ERR(hdr);
1948
1949         cookie.msg = msg;
1950         cookie.idx = key_idx;
1951
1952         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1953             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
1954                 goto nla_put_failure;
1955         if (mac_addr &&
1956             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
1957                 goto nla_put_failure;
1958
1959         if (pairwise && mac_addr &&
1960             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1961                 return -ENOENT;
1962
1963         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1964                                  mac_addr, &cookie, get_key_callback);
1965
1966         if (err)
1967                 goto free_msg;
1968
1969         if (cookie.error)
1970                 goto nla_put_failure;
1971
1972         genlmsg_end(msg, hdr);
1973         return genlmsg_reply(msg, info);
1974
1975  nla_put_failure:
1976         err = -ENOBUFS;
1977  free_msg:
1978         nlmsg_free(msg);
1979         return err;
1980 }
1981
1982 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1983 {
1984         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1985         struct key_parse key;
1986         int err;
1987         struct net_device *dev = info->user_ptr[1];
1988
1989         err = nl80211_parse_key(info, &key);
1990         if (err)
1991                 return err;
1992
1993         if (key.idx < 0)
1994                 return -EINVAL;
1995
1996         /* only support setting default key */
1997         if (!key.def && !key.defmgmt)
1998                 return -EINVAL;
1999
2000         wdev_lock(dev->ieee80211_ptr);
2001
2002         if (key.def) {
2003                 if (!rdev->ops->set_default_key) {
2004                         err = -EOPNOTSUPP;
2005                         goto out;
2006                 }
2007
2008                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2009                 if (err)
2010                         goto out;
2011
2012                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2013                                                  key.def_uni, key.def_multi);
2014
2015                 if (err)
2016                         goto out;
2017
2018 #ifdef CONFIG_CFG80211_WEXT
2019                 dev->ieee80211_ptr->wext.default_key = key.idx;
2020 #endif
2021         } else {
2022                 if (key.def_uni || !key.def_multi) {
2023                         err = -EINVAL;
2024                         goto out;
2025                 }
2026
2027                 if (!rdev->ops->set_default_mgmt_key) {
2028                         err = -EOPNOTSUPP;
2029                         goto out;
2030                 }
2031
2032                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2033                 if (err)
2034                         goto out;
2035
2036                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2037                                                       dev, key.idx);
2038                 if (err)
2039                         goto out;
2040
2041 #ifdef CONFIG_CFG80211_WEXT
2042                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2043 #endif
2044         }
2045
2046  out:
2047         wdev_unlock(dev->ieee80211_ptr);
2048
2049         return err;
2050 }
2051
2052 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2053 {
2054         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2055         int err;
2056         struct net_device *dev = info->user_ptr[1];
2057         struct key_parse key;
2058         const u8 *mac_addr = NULL;
2059
2060         err = nl80211_parse_key(info, &key);
2061         if (err)
2062                 return err;
2063
2064         if (!key.p.key)
2065                 return -EINVAL;
2066
2067         if (info->attrs[NL80211_ATTR_MAC])
2068                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2069
2070         if (key.type == -1) {
2071                 if (mac_addr)
2072                         key.type = NL80211_KEYTYPE_PAIRWISE;
2073                 else
2074                         key.type = NL80211_KEYTYPE_GROUP;
2075         }
2076
2077         /* for now */
2078         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2079             key.type != NL80211_KEYTYPE_GROUP)
2080                 return -EINVAL;
2081
2082         if (!rdev->ops->add_key)
2083                 return -EOPNOTSUPP;
2084
2085         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2086                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2087                                            mac_addr))
2088                 return -EINVAL;
2089
2090         wdev_lock(dev->ieee80211_ptr);
2091         err = nl80211_key_allowed(dev->ieee80211_ptr);
2092         if (!err)
2093                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2094                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2095                                          mac_addr, &key.p);
2096         wdev_unlock(dev->ieee80211_ptr);
2097
2098         return err;
2099 }
2100
2101 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2102 {
2103         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2104         int err;
2105         struct net_device *dev = info->user_ptr[1];
2106         u8 *mac_addr = NULL;
2107         struct key_parse key;
2108
2109         err = nl80211_parse_key(info, &key);
2110         if (err)
2111                 return err;
2112
2113         if (info->attrs[NL80211_ATTR_MAC])
2114                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2115
2116         if (key.type == -1) {
2117                 if (mac_addr)
2118                         key.type = NL80211_KEYTYPE_PAIRWISE;
2119                 else
2120                         key.type = NL80211_KEYTYPE_GROUP;
2121         }
2122
2123         /* for now */
2124         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2125             key.type != NL80211_KEYTYPE_GROUP)
2126                 return -EINVAL;
2127
2128         if (!rdev->ops->del_key)
2129                 return -EOPNOTSUPP;
2130
2131         wdev_lock(dev->ieee80211_ptr);
2132         err = nl80211_key_allowed(dev->ieee80211_ptr);
2133
2134         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2135             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2136                 err = -ENOENT;
2137
2138         if (!err)
2139                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2140                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2141                                          mac_addr);
2142
2143 #ifdef CONFIG_CFG80211_WEXT
2144         if (!err) {
2145                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2146                         dev->ieee80211_ptr->wext.default_key = -1;
2147                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2148                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2149         }
2150 #endif
2151         wdev_unlock(dev->ieee80211_ptr);
2152
2153         return err;
2154 }
2155
2156 static int nl80211_parse_beacon(struct genl_info *info,
2157                                 struct cfg80211_beacon_data *bcn)
2158 {
2159         bool haveinfo = false;
2160
2161         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2162             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2163             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2164             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2165                 return -EINVAL;
2166
2167         memset(bcn, 0, sizeof(*bcn));
2168
2169         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2170                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2171                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2172                 if (!bcn->head_len)
2173                         return -EINVAL;
2174                 haveinfo = true;
2175         }
2176
2177         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2178                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2179                 bcn->tail_len =
2180                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2181                 haveinfo = true;
2182         }
2183
2184         if (!haveinfo)
2185                 return -EINVAL;
2186
2187         if (info->attrs[NL80211_ATTR_IE]) {
2188                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2189                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2190         }
2191
2192         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2193                 bcn->proberesp_ies =
2194                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2195                 bcn->proberesp_ies_len =
2196                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2197         }
2198
2199         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2200                 bcn->assocresp_ies =
2201                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2202                 bcn->assocresp_ies_len =
2203                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2204         }
2205
2206         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2207                 bcn->probe_resp =
2208                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2209                 bcn->probe_resp_len =
2210                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2211         }
2212
2213         return 0;
2214 }
2215
2216 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2217 {
2218         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2219         struct net_device *dev = info->user_ptr[1];
2220         struct wireless_dev *wdev = dev->ieee80211_ptr;
2221         struct cfg80211_ap_settings params;
2222         int err;
2223
2224         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2225             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2226                 return -EOPNOTSUPP;
2227
2228         if (!rdev->ops->start_ap)
2229                 return -EOPNOTSUPP;
2230
2231         if (wdev->beacon_interval)
2232                 return -EALREADY;
2233
2234         memset(&params, 0, sizeof(params));
2235
2236         /* these are required for START_AP */
2237         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2238             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2239             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2240                 return -EINVAL;
2241
2242         err = nl80211_parse_beacon(info, &params.beacon);
2243         if (err)
2244                 return err;
2245
2246         params.beacon_interval =
2247                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2248         params.dtim_period =
2249                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2250
2251         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2252         if (err)
2253                 return err;
2254
2255         /*
2256          * In theory, some of these attributes should be required here
2257          * but since they were not used when the command was originally
2258          * added, keep them optional for old user space programs to let
2259          * them continue to work with drivers that do not need the
2260          * additional information -- drivers must check!
2261          */
2262         if (info->attrs[NL80211_ATTR_SSID]) {
2263                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2264                 params.ssid_len =
2265                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2266                 if (params.ssid_len == 0 ||
2267                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2268                         return -EINVAL;
2269         }
2270
2271         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2272                 params.hidden_ssid = nla_get_u32(
2273                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2274                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2275                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2276                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2277                         return -EINVAL;
2278         }
2279
2280         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2281
2282         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2283                 params.auth_type = nla_get_u32(
2284                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2285                 if (!nl80211_valid_auth_type(params.auth_type))
2286                         return -EINVAL;
2287         } else
2288                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2289
2290         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2291                                       NL80211_MAX_NR_CIPHER_SUITES);
2292         if (err)
2293                 return err;
2294
2295         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2296                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2297                         return -EOPNOTSUPP;
2298                 params.inactivity_timeout = nla_get_u16(
2299                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2300         }
2301
2302         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2303         if (!err)
2304                 wdev->beacon_interval = params.beacon_interval;
2305         return err;
2306 }
2307
2308 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2309 {
2310         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2311         struct net_device *dev = info->user_ptr[1];
2312         struct wireless_dev *wdev = dev->ieee80211_ptr;
2313         struct cfg80211_beacon_data params;
2314         int err;
2315
2316         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2317             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2318                 return -EOPNOTSUPP;
2319
2320         if (!rdev->ops->change_beacon)
2321                 return -EOPNOTSUPP;
2322
2323         if (!wdev->beacon_interval)
2324                 return -EINVAL;
2325
2326         err = nl80211_parse_beacon(info, &params);
2327         if (err)
2328                 return err;
2329
2330         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2331 }
2332
2333 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2334 {
2335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2336         struct net_device *dev = info->user_ptr[1];
2337         struct wireless_dev *wdev = dev->ieee80211_ptr;
2338         int err;
2339
2340         if (!rdev->ops->stop_ap)
2341                 return -EOPNOTSUPP;
2342
2343         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2344             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2345                 return -EOPNOTSUPP;
2346
2347         if (!wdev->beacon_interval)
2348                 return -ENOENT;
2349
2350         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2351         if (!err)
2352                 wdev->beacon_interval = 0;
2353         return err;
2354 }
2355
2356 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2357         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2358         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2359         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2360         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2361         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2362         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2363 };
2364
2365 static int parse_station_flags(struct genl_info *info,
2366                                enum nl80211_iftype iftype,
2367                                struct station_parameters *params)
2368 {
2369         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2370         struct nlattr *nla;
2371         int flag;
2372
2373         /*
2374          * Try parsing the new attribute first so userspace
2375          * can specify both for older kernels.
2376          */
2377         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2378         if (nla) {
2379                 struct nl80211_sta_flag_update *sta_flags;
2380
2381                 sta_flags = nla_data(nla);
2382                 params->sta_flags_mask = sta_flags->mask;
2383                 params->sta_flags_set = sta_flags->set;
2384                 if ((params->sta_flags_mask |
2385                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2386                         return -EINVAL;
2387                 return 0;
2388         }
2389
2390         /* if present, parse the old attribute */
2391
2392         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2393         if (!nla)
2394                 return 0;
2395
2396         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2397                              nla, sta_flags_policy))
2398                 return -EINVAL;
2399
2400         /*
2401          * Only allow certain flags for interface types so that
2402          * other attributes are silently ignored. Remember that
2403          * this is backward compatibility code with old userspace
2404          * and shouldn't be hit in other cases anyway.
2405          */
2406         switch (iftype) {
2407         case NL80211_IFTYPE_AP:
2408         case NL80211_IFTYPE_AP_VLAN:
2409         case NL80211_IFTYPE_P2P_GO:
2410                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2411                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2412                                          BIT(NL80211_STA_FLAG_WME) |
2413                                          BIT(NL80211_STA_FLAG_MFP);
2414                 break;
2415         case NL80211_IFTYPE_P2P_CLIENT:
2416         case NL80211_IFTYPE_STATION:
2417                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2418                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2419                 break;
2420         case NL80211_IFTYPE_MESH_POINT:
2421                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2422                                          BIT(NL80211_STA_FLAG_MFP) |
2423                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2424         default:
2425                 return -EINVAL;
2426         }
2427
2428         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2429                 if (flags[flag]) {
2430                         params->sta_flags_set |= (1<<flag);
2431
2432                         /* no longer support new API additions in old API */
2433                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2434                                 return -EINVAL;
2435                 }
2436         }
2437
2438         return 0;
2439 }
2440
2441 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2442                                  int attr)
2443 {
2444         struct nlattr *rate;
2445         u16 bitrate;
2446
2447         rate = nla_nest_start(msg, attr);
2448         if (!rate)
2449                 goto nla_put_failure;
2450
2451         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2452         bitrate = cfg80211_calculate_bitrate(info);
2453         if ((bitrate > 0 &&
2454              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2455             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2456              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2457             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2458              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2459             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2460              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2461                 goto nla_put_failure;
2462
2463         nla_nest_end(msg, rate);
2464         return true;
2465
2466 nla_put_failure:
2467         return false;
2468 }
2469
2470 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2471                                 int flags,
2472                                 struct cfg80211_registered_device *rdev,
2473                                 struct net_device *dev,
2474                                 const u8 *mac_addr, struct station_info *sinfo)
2475 {
2476         void *hdr;
2477         struct nlattr *sinfoattr, *bss_param;
2478
2479         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2480         if (!hdr)
2481                 return -1;
2482
2483         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2484             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2485             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2486                 goto nla_put_failure;
2487
2488         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2489         if (!sinfoattr)
2490                 goto nla_put_failure;
2491         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2492             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2493                         sinfo->connected_time))
2494                 goto nla_put_failure;
2495         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2496             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2497                         sinfo->inactive_time))
2498                 goto nla_put_failure;
2499         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2500             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2501                         sinfo->rx_bytes))
2502                 goto nla_put_failure;
2503         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2504             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2505                         sinfo->tx_bytes))
2506                 goto nla_put_failure;
2507         if ((sinfo->filled & STATION_INFO_LLID) &&
2508             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2509                 goto nla_put_failure;
2510         if ((sinfo->filled & STATION_INFO_PLID) &&
2511             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2512                 goto nla_put_failure;
2513         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2514             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2515                        sinfo->plink_state))
2516                 goto nla_put_failure;
2517         switch (rdev->wiphy.signal_type) {
2518         case CFG80211_SIGNAL_TYPE_MBM:
2519                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2520                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2521                                sinfo->signal))
2522                         goto nla_put_failure;
2523                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2524                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2525                                sinfo->signal_avg))
2526                         goto nla_put_failure;
2527                 break;
2528         default:
2529                 break;
2530         }
2531         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2532                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2533                                           NL80211_STA_INFO_TX_BITRATE))
2534                         goto nla_put_failure;
2535         }
2536         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2537                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2538                                           NL80211_STA_INFO_RX_BITRATE))
2539                         goto nla_put_failure;
2540         }
2541         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2542             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2543                         sinfo->rx_packets))
2544                 goto nla_put_failure;
2545         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2546             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2547                         sinfo->tx_packets))
2548                 goto nla_put_failure;
2549         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2550             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2551                         sinfo->tx_retries))
2552                 goto nla_put_failure;
2553         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2554             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2555                         sinfo->tx_failed))
2556                 goto nla_put_failure;
2557         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2558             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2559                         sinfo->beacon_loss_count))
2560                 goto nla_put_failure;
2561         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2562                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2563                 if (!bss_param)
2564                         goto nla_put_failure;
2565
2566                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2567                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2568                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2569                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2570                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2571                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2572                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2573                                sinfo->bss_param.dtim_period) ||
2574                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2575                                 sinfo->bss_param.beacon_interval))
2576                         goto nla_put_failure;
2577
2578                 nla_nest_end(msg, bss_param);
2579         }
2580         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2581             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2582                     sizeof(struct nl80211_sta_flag_update),
2583                     &sinfo->sta_flags))
2584                 goto nla_put_failure;
2585         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2586                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2587                             sinfo->t_offset))
2588                 goto nla_put_failure;
2589         nla_nest_end(msg, sinfoattr);
2590
2591         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2592             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2593                     sinfo->assoc_req_ies))
2594                 goto nla_put_failure;
2595
2596         return genlmsg_end(msg, hdr);
2597
2598  nla_put_failure:
2599         genlmsg_cancel(msg, hdr);
2600         return -EMSGSIZE;
2601 }
2602
2603 static int nl80211_dump_station(struct sk_buff *skb,
2604                                 struct netlink_callback *cb)
2605 {
2606         struct station_info sinfo;
2607         struct cfg80211_registered_device *dev;
2608         struct net_device *netdev;
2609         u8 mac_addr[ETH_ALEN];
2610         int sta_idx = cb->args[1];
2611         int err;
2612
2613         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2614         if (err)
2615                 return err;
2616
2617         if (!dev->ops->dump_station) {
2618                 err = -EOPNOTSUPP;
2619                 goto out_err;
2620         }
2621
2622         while (1) {
2623                 memset(&sinfo, 0, sizeof(sinfo));
2624                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2625                                              mac_addr, &sinfo);
2626                 if (err == -ENOENT)
2627                         break;
2628                 if (err)
2629                         goto out_err;
2630
2631                 if (nl80211_send_station(skb,
2632                                 NETLINK_CB(cb->skb).pid,
2633                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2634                                 dev, netdev, mac_addr,
2635                                 &sinfo) < 0)
2636                         goto out;
2637
2638                 sta_idx++;
2639         }
2640
2641
2642  out:
2643         cb->args[1] = sta_idx;
2644         err = skb->len;
2645  out_err:
2646         nl80211_finish_netdev_dump(dev);
2647
2648         return err;
2649 }
2650
2651 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2652 {
2653         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2654         struct net_device *dev = info->user_ptr[1];
2655         struct station_info sinfo;
2656         struct sk_buff *msg;
2657         u8 *mac_addr = NULL;
2658         int err;
2659
2660         memset(&sinfo, 0, sizeof(sinfo));
2661
2662         if (!info->attrs[NL80211_ATTR_MAC])
2663                 return -EINVAL;
2664
2665         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2666
2667         if (!rdev->ops->get_station)
2668                 return -EOPNOTSUPP;
2669
2670         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2671         if (err)
2672                 return err;
2673
2674         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2675         if (!msg)
2676                 return -ENOMEM;
2677
2678         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2679                                  rdev, dev, mac_addr, &sinfo) < 0) {
2680                 nlmsg_free(msg);
2681                 return -ENOBUFS;
2682         }
2683
2684         return genlmsg_reply(msg, info);
2685 }
2686
2687 /*
2688  * Get vlan interface making sure it is running and on the right wiphy.
2689  */
2690 static struct net_device *get_vlan(struct genl_info *info,
2691                                    struct cfg80211_registered_device *rdev)
2692 {
2693         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2694         struct net_device *v;
2695         int ret;
2696
2697         if (!vlanattr)
2698                 return NULL;
2699
2700         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2701         if (!v)
2702                 return ERR_PTR(-ENODEV);
2703
2704         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2705                 ret = -EINVAL;
2706                 goto error;
2707         }
2708
2709         if (!netif_running(v)) {
2710                 ret = -ENETDOWN;
2711                 goto error;
2712         }
2713
2714         return v;
2715  error:
2716         dev_put(v);
2717         return ERR_PTR(ret);
2718 }
2719
2720 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2721 {
2722         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2723         int err;
2724         struct net_device *dev = info->user_ptr[1];
2725         struct station_parameters params;
2726         u8 *mac_addr = NULL;
2727
2728         memset(&params, 0, sizeof(params));
2729
2730         params.listen_interval = -1;
2731         params.plink_state = -1;
2732
2733         if (info->attrs[NL80211_ATTR_STA_AID])
2734                 return -EINVAL;
2735
2736         if (!info->attrs[NL80211_ATTR_MAC])
2737                 return -EINVAL;
2738
2739         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2740
2741         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2742                 params.supported_rates =
2743                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2744                 params.supported_rates_len =
2745                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2746         }
2747
2748         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2749                 params.listen_interval =
2750                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2751
2752         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2753                 params.ht_capa =
2754                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2755
2756         if (!rdev->ops->change_station)
2757                 return -EOPNOTSUPP;
2758
2759         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2760                 return -EINVAL;
2761
2762         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2763                 params.plink_action =
2764                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2765
2766         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2767                 params.plink_state =
2768                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2769
2770         switch (dev->ieee80211_ptr->iftype) {
2771         case NL80211_IFTYPE_AP:
2772         case NL80211_IFTYPE_AP_VLAN:
2773         case NL80211_IFTYPE_P2P_GO:
2774                 /* disallow mesh-specific things */
2775                 if (params.plink_action)
2776                         return -EINVAL;
2777
2778                 /* TDLS can't be set, ... */
2779                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2780                         return -EINVAL;
2781                 /*
2782                  * ... but don't bother the driver with it. This works around
2783                  * a hostapd/wpa_supplicant issue -- it always includes the
2784                  * TLDS_PEER flag in the mask even for AP mode.
2785                  */
2786                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2787
2788                 /* accept only the listed bits */
2789                 if (params.sta_flags_mask &
2790                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2791                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2792                                   BIT(NL80211_STA_FLAG_WME) |
2793                                   BIT(NL80211_STA_FLAG_MFP)))
2794                         return -EINVAL;
2795
2796                 /* must be last in here for error handling */
2797                 params.vlan = get_vlan(info, rdev);
2798                 if (IS_ERR(params.vlan))
2799                         return PTR_ERR(params.vlan);
2800                 break;
2801         case NL80211_IFTYPE_P2P_CLIENT:
2802         case NL80211_IFTYPE_STATION:
2803                 /*
2804                  * Don't allow userspace to change the TDLS_PEER flag,
2805                  * but silently ignore attempts to change it since we
2806                  * don't have state here to verify that it doesn't try
2807                  * to change the flag.
2808                  */
2809                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2810                 /* fall through */
2811         case NL80211_IFTYPE_ADHOC:
2812                 /* disallow things sta doesn't support */
2813                 if (params.plink_action)
2814                         return -EINVAL;
2815                 if (params.ht_capa)
2816                         return -EINVAL;
2817                 if (params.listen_interval >= 0)
2818                         return -EINVAL;
2819                 /* reject any changes other than AUTHORIZED */
2820                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2821                         return -EINVAL;
2822                 break;
2823         case NL80211_IFTYPE_MESH_POINT:
2824                 /* disallow things mesh doesn't support */
2825                 if (params.vlan)
2826                         return -EINVAL;
2827                 if (params.ht_capa)
2828                         return -EINVAL;
2829                 if (params.listen_interval >= 0)
2830                         return -EINVAL;
2831                 /*
2832                  * No special handling for TDLS here -- the userspace
2833                  * mesh code doesn't have this bug.
2834                  */
2835                 if (params.sta_flags_mask &
2836                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2837                                   BIT(NL80211_STA_FLAG_MFP) |
2838                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2839                         return -EINVAL;
2840                 break;
2841         default:
2842                 return -EOPNOTSUPP;
2843         }
2844
2845         /* be aware of params.vlan when changing code here */
2846
2847         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2848
2849         if (params.vlan)
2850                 dev_put(params.vlan);
2851
2852         return err;
2853 }
2854
2855 static struct nla_policy
2856 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2857         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2858         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2859 };
2860
2861 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2862 {
2863         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2864         int err;
2865         struct net_device *dev = info->user_ptr[1];
2866         struct station_parameters params;
2867         u8 *mac_addr = NULL;
2868
2869         memset(&params, 0, sizeof(params));
2870
2871         if (!info->attrs[NL80211_ATTR_MAC])
2872                 return -EINVAL;
2873
2874         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2875                 return -EINVAL;
2876
2877         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2878                 return -EINVAL;
2879
2880         if (!info->attrs[NL80211_ATTR_STA_AID])
2881                 return -EINVAL;
2882
2883         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2884         params.supported_rates =
2885                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2886         params.supported_rates_len =
2887                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2888         params.listen_interval =
2889                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2890
2891         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2892         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2893                 return -EINVAL;
2894
2895         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2896                 params.ht_capa =
2897                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2898
2899         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2900                 params.plink_action =
2901                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2902
2903         if (!rdev->ops->add_station)
2904                 return -EOPNOTSUPP;
2905
2906         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2907                 return -EINVAL;
2908
2909         switch (dev->ieee80211_ptr->iftype) {
2910         case NL80211_IFTYPE_AP:
2911         case NL80211_IFTYPE_AP_VLAN:
2912         case NL80211_IFTYPE_P2P_GO:
2913                 /* parse WME attributes if sta is WME capable */
2914                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2915                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2916                     info->attrs[NL80211_ATTR_STA_WME]) {
2917                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2918                         struct nlattr *nla;
2919
2920                         nla = info->attrs[NL80211_ATTR_STA_WME];
2921                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2922                                                nl80211_sta_wme_policy);
2923                         if (err)
2924                                 return err;
2925
2926                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2927                                 params.uapsd_queues =
2928                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2929                         if (params.uapsd_queues &
2930                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2931                                 return -EINVAL;
2932
2933                         if (tb[NL80211_STA_WME_MAX_SP])
2934                                 params.max_sp =
2935                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2936
2937                         if (params.max_sp &
2938                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2939                                 return -EINVAL;
2940
2941                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2942                 }
2943                 /* TDLS peers cannot be added */
2944                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2945                         return -EINVAL;
2946                 /* but don't bother the driver with it */
2947                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2948
2949                 /* must be last in here for error handling */
2950                 params.vlan = get_vlan(info, rdev);
2951                 if (IS_ERR(params.vlan))
2952                         return PTR_ERR(params.vlan);
2953                 break;
2954         case NL80211_IFTYPE_MESH_POINT:
2955                 /* TDLS peers cannot be added */
2956                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2957                         return -EINVAL;
2958                 break;
2959         case NL80211_IFTYPE_STATION:
2960                 /* Only TDLS peers can be added */
2961                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2962                         return -EINVAL;
2963                 /* Can only add if TDLS ... */
2964                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2965                         return -EOPNOTSUPP;
2966                 /* ... with external setup is supported */
2967                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2968                         return -EOPNOTSUPP;
2969                 break;
2970         default:
2971                 return -EOPNOTSUPP;
2972         }
2973
2974         /* be aware of params.vlan when changing code here */
2975
2976         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2977
2978         if (params.vlan)
2979                 dev_put(params.vlan);
2980         return err;
2981 }
2982
2983 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2984 {
2985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2986         struct net_device *dev = info->user_ptr[1];
2987         u8 *mac_addr = NULL;
2988
2989         if (info->attrs[NL80211_ATTR_MAC])
2990                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2991
2992         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2993             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2994             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2995             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2996                 return -EINVAL;
2997
2998         if (!rdev->ops->del_station)
2999                 return -EOPNOTSUPP;
3000
3001         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3002 }
3003
3004 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3005                                 int flags, struct net_device *dev,
3006                                 u8 *dst, u8 *next_hop,
3007                                 struct mpath_info *pinfo)
3008 {
3009         void *hdr;
3010         struct nlattr *pinfoattr;
3011
3012         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3013         if (!hdr)
3014                 return -1;
3015
3016         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3017             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3018             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3019             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3020                 goto nla_put_failure;
3021
3022         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3023         if (!pinfoattr)
3024                 goto nla_put_failure;
3025         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3026             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3027                         pinfo->frame_qlen))
3028                 goto nla_put_failure;
3029         if (((pinfo->filled & MPATH_INFO_SN) &&
3030              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3031             ((pinfo->filled & MPATH_INFO_METRIC) &&
3032              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3033                          pinfo->metric)) ||
3034             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3035              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3036                          pinfo->exptime)) ||
3037             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3038              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3039                         pinfo->flags)) ||
3040             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3041              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3042                          pinfo->discovery_timeout)) ||
3043             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3044              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3045                         pinfo->discovery_retries)))
3046                 goto nla_put_failure;
3047
3048         nla_nest_end(msg, pinfoattr);
3049
3050         return genlmsg_end(msg, hdr);
3051
3052  nla_put_failure:
3053         genlmsg_cancel(msg, hdr);
3054         return -EMSGSIZE;
3055 }
3056
3057 static int nl80211_dump_mpath(struct sk_buff *skb,
3058                               struct netlink_callback *cb)
3059 {
3060         struct mpath_info pinfo;
3061         struct cfg80211_registered_device *dev;
3062         struct net_device *netdev;
3063         u8 dst[ETH_ALEN];
3064         u8 next_hop[ETH_ALEN];
3065         int path_idx = cb->args[1];
3066         int err;
3067
3068         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3069         if (err)
3070                 return err;
3071
3072         if (!dev->ops->dump_mpath) {
3073                 err = -EOPNOTSUPP;
3074                 goto out_err;
3075         }
3076
3077         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3078                 err = -EOPNOTSUPP;
3079                 goto out_err;
3080         }
3081
3082         while (1) {
3083                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3084                                            dst, next_hop, &pinfo);
3085                 if (err == -ENOENT)
3086                         break;
3087                 if (err)
3088                         goto out_err;
3089
3090                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3091                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3092                                        netdev, dst, next_hop,
3093                                        &pinfo) < 0)
3094                         goto out;
3095
3096                 path_idx++;
3097         }
3098
3099
3100  out:
3101         cb->args[1] = path_idx;
3102         err = skb->len;
3103  out_err:
3104         nl80211_finish_netdev_dump(dev);
3105         return err;
3106 }
3107
3108 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3109 {
3110         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3111         int err;
3112         struct net_device *dev = info->user_ptr[1];
3113         struct mpath_info pinfo;
3114         struct sk_buff *msg;
3115         u8 *dst = NULL;
3116         u8 next_hop[ETH_ALEN];
3117
3118         memset(&pinfo, 0, sizeof(pinfo));
3119
3120         if (!info->attrs[NL80211_ATTR_MAC])
3121                 return -EINVAL;
3122
3123         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3124
3125         if (!rdev->ops->get_mpath)
3126                 return -EOPNOTSUPP;
3127
3128         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3129                 return -EOPNOTSUPP;
3130
3131         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3132         if (err)
3133                 return err;
3134
3135         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3136         if (!msg)
3137                 return -ENOMEM;
3138
3139         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3140                                  dev, dst, next_hop, &pinfo) < 0) {
3141                 nlmsg_free(msg);
3142                 return -ENOBUFS;
3143         }
3144
3145         return genlmsg_reply(msg, info);
3146 }
3147
3148 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3149 {
3150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3151         struct net_device *dev = info->user_ptr[1];
3152         u8 *dst = NULL;
3153         u8 *next_hop = NULL;
3154
3155         if (!info->attrs[NL80211_ATTR_MAC])
3156                 return -EINVAL;
3157
3158         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3159                 return -EINVAL;
3160
3161         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3162         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3163
3164         if (!rdev->ops->change_mpath)
3165                 return -EOPNOTSUPP;
3166
3167         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3168                 return -EOPNOTSUPP;
3169
3170         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3171 }
3172
3173 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3174 {
3175         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3176         struct net_device *dev = info->user_ptr[1];
3177         u8 *dst = NULL;
3178         u8 *next_hop = NULL;
3179
3180         if (!info->attrs[NL80211_ATTR_MAC])
3181                 return -EINVAL;
3182
3183         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3184                 return -EINVAL;
3185
3186         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3187         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3188
3189         if (!rdev->ops->add_mpath)
3190                 return -EOPNOTSUPP;
3191
3192         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3193                 return -EOPNOTSUPP;
3194
3195         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3196 }
3197
3198 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3199 {
3200         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3201         struct net_device *dev = info->user_ptr[1];
3202         u8 *dst = NULL;
3203
3204         if (info->attrs[NL80211_ATTR_MAC])
3205                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3206
3207         if (!rdev->ops->del_mpath)
3208                 return -EOPNOTSUPP;
3209
3210         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3211 }
3212
3213 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3214 {
3215         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3216         struct net_device *dev = info->user_ptr[1];
3217         struct bss_parameters params;
3218
3219         memset(&params, 0, sizeof(params));
3220         /* default to not changing parameters */
3221         params.use_cts_prot = -1;
3222         params.use_short_preamble = -1;
3223         params.use_short_slot_time = -1;
3224         params.ap_isolate = -1;
3225         params.ht_opmode = -1;
3226
3227         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3228                 params.use_cts_prot =
3229                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3230         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3231                 params.use_short_preamble =
3232                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3233         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3234                 params.use_short_slot_time =
3235                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3236         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3237                 params.basic_rates =
3238                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3239                 params.basic_rates_len =
3240                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3241         }
3242         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3243                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3244         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3245                 params.ht_opmode =
3246                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3247
3248         if (!rdev->ops->change_bss)
3249                 return -EOPNOTSUPP;
3250
3251         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3252             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3253                 return -EOPNOTSUPP;
3254
3255         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3256 }
3257
3258 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3259         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3260         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3261         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3262         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3263         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3264         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3265 };
3266
3267 static int parse_reg_rule(struct nlattr *tb[],
3268         struct ieee80211_reg_rule *reg_rule)
3269 {
3270         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3271         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3272
3273         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3274                 return -EINVAL;
3275         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3276                 return -EINVAL;
3277         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3278                 return -EINVAL;
3279         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3280                 return -EINVAL;
3281         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3282                 return -EINVAL;
3283
3284         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3285
3286         freq_range->start_freq_khz =
3287                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3288         freq_range->end_freq_khz =
3289                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3290         freq_range->max_bandwidth_khz =
3291                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3292
3293         power_rule->max_eirp =
3294                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3295
3296         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3297                 power_rule->max_antenna_gain =
3298                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3299
3300         return 0;
3301 }
3302
3303 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3304 {
3305         int r;
3306         char *data = NULL;
3307
3308         /*
3309          * You should only get this when cfg80211 hasn't yet initialized
3310          * completely when built-in to the kernel right between the time
3311          * window between nl80211_init() and regulatory_init(), if that is
3312          * even possible.
3313          */
3314         mutex_lock(&cfg80211_mutex);
3315         if (unlikely(!cfg80211_regdomain)) {
3316                 mutex_unlock(&cfg80211_mutex);
3317                 return -EINPROGRESS;
3318         }
3319         mutex_unlock(&cfg80211_mutex);
3320
3321         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3322                 return -EINVAL;
3323
3324         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3325
3326         r = regulatory_hint_user(data);
3327
3328         return r;
3329 }
3330
3331 static int nl80211_get_mesh_config(struct sk_buff *skb,
3332                                    struct genl_info *info)
3333 {
3334         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3335         struct net_device *dev = info->user_ptr[1];
3336         struct wireless_dev *wdev = dev->ieee80211_ptr;
3337         struct mesh_config cur_params;
3338         int err = 0;
3339         void *hdr;
3340         struct nlattr *pinfoattr;
3341         struct sk_buff *msg;
3342
3343         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3344                 return -EOPNOTSUPP;
3345
3346         if (!rdev->ops->get_mesh_config)
3347                 return -EOPNOTSUPP;
3348
3349         wdev_lock(wdev);
3350         /* If not connected, get default parameters */
3351         if (!wdev->mesh_id_len)
3352                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3353         else
3354                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3355                                                  &cur_params);
3356         wdev_unlock(wdev);
3357
3358         if (err)
3359                 return err;
3360
3361         /* Draw up a netlink message to send back */
3362         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3363         if (!msg)
3364                 return -ENOMEM;
3365         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3366                              NL80211_CMD_GET_MESH_CONFIG);
3367         if (!hdr)
3368                 goto out;
3369         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3370         if (!pinfoattr)
3371                 goto nla_put_failure;
3372         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3373             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3374                         cur_params.dot11MeshRetryTimeout) ||
3375             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3376                         cur_params.dot11MeshConfirmTimeout) ||
3377             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3378                         cur_params.dot11MeshHoldingTimeout) ||
3379             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3380                         cur_params.dot11MeshMaxPeerLinks) ||
3381             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3382                        cur_params.dot11MeshMaxRetries) ||
3383             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3384                        cur_params.dot11MeshTTL) ||
3385             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3386                        cur_params.element_ttl) ||
3387             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3388                        cur_params.auto_open_plinks) ||
3389             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3390                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3391             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3392                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3393             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3394                         cur_params.path_refresh_time) ||
3395             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3396                         cur_params.min_discovery_timeout) ||
3397             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3398                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3399             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3400                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3401             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3402                         cur_params.dot11MeshHWMPperrMinInterval) ||
3403             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3404                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3405             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3406                        cur_params.dot11MeshHWMPRootMode) ||
3407             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3408                         cur_params.dot11MeshHWMPRannInterval) ||
3409             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3410                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3411             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3412                        cur_params.dot11MeshForwarding) ||
3413             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3414                         cur_params.rssi_threshold) ||
3415             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3416                         cur_params.ht_opmode))
3417                 goto nla_put_failure;
3418         nla_nest_end(msg, pinfoattr);
3419         genlmsg_end(msg, hdr);
3420         return genlmsg_reply(msg, info);
3421
3422  nla_put_failure:
3423         genlmsg_cancel(msg, hdr);
3424  out:
3425         nlmsg_free(msg);
3426         return -ENOBUFS;
3427 }
3428
3429 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3430         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3431         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3432         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3433         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3434         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3435         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3436         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3437         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3438         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3439
3440         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3441         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3442         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3443         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3444         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3445         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3446         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3447         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3448         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3449         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3450         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3451         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3452         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16},
3453 };
3454
3455 static const struct nla_policy
3456         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3457         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3458         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3459         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3460         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3461         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3462                 .len = IEEE80211_MAX_DATA_LEN },
3463         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3464 };
3465
3466 static int nl80211_parse_mesh_config(struct genl_info *info,
3467                                      struct mesh_config *cfg,
3468                                      u32 *mask_out)
3469 {
3470         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3471         u32 mask = 0;
3472
3473 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3474 do {\
3475         if (table[attr_num]) {\
3476                 cfg->param = nla_fn(table[attr_num]); \
3477                 mask |= (1 << (attr_num - 1)); \
3478         } \
3479 } while (0);\
3480
3481
3482         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3483                 return -EINVAL;
3484         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3485                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3486                              nl80211_meshconf_params_policy))
3487                 return -EINVAL;
3488
3489         /* This makes sure that there aren't more than 32 mesh config
3490          * parameters (otherwise our bitfield scheme would not work.) */
3491         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3492
3493         /* Fill in the params struct */
3494         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3495                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3496         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3497                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3498         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3499                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3500         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3501                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3502         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3503                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3504         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3505                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3506         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3507                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3508         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3509                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3510         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
3511                         mask, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3512                         nla_get_u32);
3513         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3514                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3515                         nla_get_u8);
3516         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3517                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3518         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3519                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3520                         nla_get_u16);
3521         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3522                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3523                         nla_get_u32);
3524         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3525                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3526                         nla_get_u16);
3527         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3528                         mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3529                         nla_get_u16);
3530         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3531                         dot11MeshHWMPnetDiameterTraversalTime,
3532                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3533                         nla_get_u16);
3534         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3535                         dot11MeshHWMPRootMode, mask,
3536                         NL80211_MESHCONF_HWMP_ROOTMODE,
3537                         nla_get_u8);
3538         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3539                         dot11MeshHWMPRannInterval, mask,
3540                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3541                         nla_get_u16);
3542         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3543                         dot11MeshGateAnnouncementProtocol, mask,
3544                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3545                         nla_get_u8);
3546         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3547                         mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3548         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3549                         mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3550         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3551                         mask, NL80211_MESHCONF_HT_OPMODE, nla_get_u16);
3552         if (mask_out)
3553                 *mask_out = mask;
3554
3555         return 0;
3556
3557 #undef FILL_IN_MESH_PARAM_IF_SET
3558 }
3559
3560 static int nl80211_parse_mesh_setup(struct genl_info *info,
3561                                      struct mesh_setup *setup)
3562 {
3563         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3564
3565         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3566                 return -EINVAL;
3567         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3568                              info->attrs[NL80211_ATTR_MESH_SETUP],
3569                              nl80211_mesh_setup_params_policy))
3570                 return -EINVAL;
3571
3572         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3573                 setup->sync_method =
3574                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3575                  IEEE80211_SYNC_METHOD_VENDOR :
3576                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3577
3578         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3579                 setup->path_sel_proto =
3580                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3581                  IEEE80211_PATH_PROTOCOL_VENDOR :
3582                  IEEE80211_PATH_PROTOCOL_HWMP;
3583
3584         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3585                 setup->path_metric =
3586                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3587                  IEEE80211_PATH_METRIC_VENDOR :
3588                  IEEE80211_PATH_METRIC_AIRTIME;
3589
3590
3591         if (tb[NL80211_MESH_SETUP_IE]) {
3592                 struct nlattr *ieattr =
3593                         tb[NL80211_MESH_SETUP_IE];
3594                 if (!is_valid_ie_attr(ieattr))
3595                         return -EINVAL;
3596                 setup->ie = nla_data(ieattr);
3597                 setup->ie_len = nla_len(ieattr);
3598         }
3599         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3600         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3601
3602         return 0;
3603 }
3604
3605 static int nl80211_update_mesh_config(struct sk_buff *skb,
3606                                       struct genl_info *info)
3607 {
3608         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3609         struct net_device *dev = info->user_ptr[1];
3610         struct wireless_dev *wdev = dev->ieee80211_ptr;
3611         struct mesh_config cfg;
3612         u32 mask;
3613         int err;
3614
3615         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3616                 return -EOPNOTSUPP;
3617
3618         if (!rdev->ops->update_mesh_config)
3619                 return -EOPNOTSUPP;
3620
3621         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3622         if (err)
3623                 return err;
3624
3625         wdev_lock(wdev);
3626         if (!wdev->mesh_id_len)
3627                 err = -ENOLINK;
3628
3629         if (!err)
3630                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3631                                                     mask, &cfg);
3632
3633         wdev_unlock(wdev);
3634
3635         return err;
3636 }
3637
3638 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3639 {
3640         struct sk_buff *msg;
3641         void *hdr = NULL;
3642         struct nlattr *nl_reg_rules;
3643         unsigned int i;
3644         int err = -EINVAL;
3645
3646         mutex_lock(&cfg80211_mutex);
3647
3648         if (!cfg80211_regdomain)
3649                 goto out;
3650
3651         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3652         if (!msg) {
3653                 err = -ENOBUFS;
3654                 goto out;
3655         }
3656
3657         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3658                              NL80211_CMD_GET_REG);
3659         if (!hdr)
3660                 goto put_failure;
3661
3662         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3663                            cfg80211_regdomain->alpha2) ||
3664             (cfg80211_regdomain->dfs_region &&
3665              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3666                         cfg80211_regdomain->dfs_region)))
3667                 goto nla_put_failure;
3668
3669         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3670         if (!nl_reg_rules)
3671                 goto nla_put_failure;
3672
3673         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3674                 struct nlattr *nl_reg_rule;
3675                 const struct ieee80211_reg_rule *reg_rule;
3676                 const struct ieee80211_freq_range *freq_range;
3677                 const struct ieee80211_power_rule *power_rule;
3678
3679                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3680                 freq_range = &reg_rule->freq_range;
3681                 power_rule = &reg_rule->power_rule;
3682
3683                 nl_reg_rule = nla_nest_start(msg, i);
3684                 if (!nl_reg_rule)
3685                         goto nla_put_failure;
3686
3687                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3688                                 reg_rule->flags) ||
3689                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3690                                 freq_range->start_freq_khz) ||
3691                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3692                                 freq_range->end_freq_khz) ||
3693                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3694                                 freq_range->max_bandwidth_khz) ||
3695                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3696                                 power_rule->max_antenna_gain) ||
3697                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3698                                 power_rule->max_eirp))
3699                         goto nla_put_failure;
3700
3701                 nla_nest_end(msg, nl_reg_rule);
3702         }
3703
3704         nla_nest_end(msg, nl_reg_rules);
3705
3706         genlmsg_end(msg, hdr);
3707         err = genlmsg_reply(msg, info);
3708         goto out;
3709
3710 nla_put_failure:
3711         genlmsg_cancel(msg, hdr);
3712 put_failure:
3713         nlmsg_free(msg);
3714         err = -EMSGSIZE;
3715 out:
3716         mutex_unlock(&cfg80211_mutex);
3717         return err;
3718 }
3719
3720 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3721 {
3722         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3723         struct nlattr *nl_reg_rule;
3724         char *alpha2 = NULL;
3725         int rem_reg_rules = 0, r = 0;
3726         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3727         u8 dfs_region = 0;
3728         struct ieee80211_regdomain *rd = NULL;
3729
3730         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3731                 return -EINVAL;
3732
3733         if (!info->attrs[NL80211_ATTR_REG_RULES])
3734                 return -EINVAL;
3735
3736         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3737
3738         if (info->attrs[NL80211_ATTR_DFS_REGION])
3739                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3740
3741         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3742                         rem_reg_rules) {
3743                 num_rules++;
3744                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3745                         return -EINVAL;
3746         }
3747
3748         mutex_lock(&cfg80211_mutex);
3749
3750         if (!reg_is_valid_request(alpha2)) {
3751                 r = -EINVAL;
3752                 goto bad_reg;
3753         }
3754
3755         size_of_regd = sizeof(struct ieee80211_regdomain) +
3756                 (num_rules * sizeof(struct ieee80211_reg_rule));
3757
3758         rd = kzalloc(size_of_regd, GFP_KERNEL);
3759         if (!rd) {
3760                 r = -ENOMEM;
3761                 goto bad_reg;
3762         }
3763
3764         rd->n_reg_rules = num_rules;
3765         rd->alpha2[0] = alpha2[0];
3766         rd->alpha2[1] = alpha2[1];
3767
3768         /*
3769          * Disable DFS master mode if the DFS region was
3770          * not supported or known on this kernel.
3771          */
3772         if (reg_supported_dfs_region(dfs_region))
3773                 rd->dfs_region = dfs_region;
3774
3775         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3776                         rem_reg_rules) {
3777                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3778                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3779                         reg_rule_policy);
3780                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3781                 if (r)
3782                         goto bad_reg;
3783
3784                 rule_idx++;
3785
3786                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3787                         r = -EINVAL;
3788                         goto bad_reg;
3789                 }
3790         }
3791
3792         BUG_ON(rule_idx != num_rules);
3793
3794         r = set_regdom(rd);
3795
3796         mutex_unlock(&cfg80211_mutex);
3797
3798         return r;
3799
3800  bad_reg:
3801         mutex_unlock(&cfg80211_mutex);
3802         kfree(rd);
3803         return r;
3804 }
3805
3806 static int validate_scan_freqs(struct nlattr *freqs)
3807 {
3808         struct nlattr *attr1, *attr2;
3809         int n_channels = 0, tmp1, tmp2;
3810
3811         nla_for_each_nested(attr1, freqs, tmp1) {
3812                 n_channels++;
3813                 /*
3814                  * Some hardware has a limited channel list for
3815                  * scanning, and it is pretty much nonsensical
3816                  * to scan for a channel twice, so disallow that
3817                  * and don't require drivers to check that the
3818                  * channel list they get isn't longer than what
3819                  * they can scan, as long as they can scan all
3820                  * the channels they registered at once.
3821                  */
3822                 nla_for_each_nested(attr2, freqs, tmp2)
3823                         if (attr1 != attr2 &&
3824                             nla_get_u32(attr1) == nla_get_u32(attr2))
3825                                 return 0;
3826         }
3827
3828         return n_channels;
3829 }
3830
3831 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3832 {
3833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3834         struct net_device *dev = info->user_ptr[1];
3835         struct cfg80211_scan_request *request;
3836         struct nlattr *attr;
3837         struct wiphy *wiphy;
3838         int err, tmp, n_ssids = 0, n_channels, i;
3839         size_t ie_len;
3840
3841         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3842                 return -EINVAL;
3843
3844         wiphy = &rdev->wiphy;
3845
3846         if (!rdev->ops->scan)
3847                 return -EOPNOTSUPP;
3848
3849         if (rdev->scan_req)
3850                 return -EBUSY;
3851
3852         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3853                 n_channels = validate_scan_freqs(
3854                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3855                 if (!n_channels)
3856                         return -EINVAL;
3857         } else {
3858                 enum ieee80211_band band;
3859                 n_channels = 0;
3860
3861                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3862                         if (wiphy->bands[band])
3863                                 n_channels += wiphy->bands[band]->n_channels;
3864         }
3865
3866         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3867                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3868                         n_ssids++;
3869
3870         if (n_ssids > wiphy->max_scan_ssids)
3871                 return -EINVAL;
3872
3873         if (info->attrs[NL80211_ATTR_IE])
3874                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3875         else
3876                 ie_len = 0;
3877
3878         if (ie_len > wiphy->max_scan_ie_len)
3879                 return -EINVAL;
3880
3881         request = kzalloc(sizeof(*request)
3882                         + sizeof(*request->ssids) * n_ssids
3883                         + sizeof(*request->channels) * n_channels
3884                         + ie_len, GFP_KERNEL);
3885         if (!request)
3886                 return -ENOMEM;
3887
3888         if (n_ssids)
3889                 request->ssids = (void *)&request->channels[n_channels];
3890         request->n_ssids = n_ssids;
3891         if (ie_len) {
3892                 if (request->ssids)
3893                         request->ie = (void *)(request->ssids + n_ssids);
3894                 else
3895                         request->ie = (void *)(request->channels + n_channels);
3896         }
3897
3898         i = 0;
3899         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3900                 /* user specified, bail out if channel not found */
3901                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3902                         struct ieee80211_channel *chan;
3903
3904                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3905
3906                         if (!chan) {
3907                                 err = -EINVAL;
3908                                 goto out_free;
3909                         }
3910
3911                         /* ignore disabled channels */
3912                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3913                                 continue;
3914
3915                         request->channels[i] = chan;
3916                         i++;
3917                 }
3918         } else {
3919                 enum ieee80211_band band;
3920
3921                 /* all channels */
3922                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3923                         int j;
3924                         if (!wiphy->bands[band])
3925                                 continue;
3926                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3927                                 struct ieee80211_channel *chan;
3928
3929                                 chan = &wiphy->bands[band]->channels[j];
3930
3931                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3932                                         continue;
3933
3934                                 request->channels[i] = chan;
3935                                 i++;
3936                         }
3937                 }
3938         }
3939
3940         if (!i) {
3941                 err = -EINVAL;
3942                 goto out_free;
3943         }
3944
3945         request->n_channels = i;
3946
3947         i = 0;
3948         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3949                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3950                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3951                                 err = -EINVAL;
3952                                 goto out_free;
3953                         }
3954                         request->ssids[i].ssid_len = nla_len(attr);
3955                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3956                         i++;
3957                 }
3958         }
3959
3960         if (info->attrs[NL80211_ATTR_IE]) {
3961                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3962                 memcpy((void *)request->ie,
3963                        nla_data(info->attrs[NL80211_ATTR_IE]),
3964                        request->ie_len);
3965         }
3966
3967         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3968                 if (wiphy->bands[i])
3969                         request->rates[i] =
3970                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3971
3972         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3973                 nla_for_each_nested(attr,
3974                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3975                                     tmp) {
3976                         enum ieee80211_band band = nla_type(attr);
3977
3978                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3979                                 err = -EINVAL;
3980                                 goto out_free;
3981                         }
3982                         err = ieee80211_get_ratemask(wiphy->bands[band],
3983                                                      nla_data(attr),
3984                                                      nla_len(attr),
3985                                                      &request->rates[band]);
3986                         if (err)
3987                                 goto out_free;
3988                 }
3989         }
3990
3991         request->no_cck =
3992                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3993
3994         request->dev = dev;
3995         request->wiphy = &rdev->wiphy;
3996
3997         rdev->scan_req = request;
3998         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3999
4000         if (!err) {
4001                 nl80211_send_scan_start(rdev, dev);
4002                 dev_hold(dev);
4003         } else {
4004  out_free:
4005                 rdev->scan_req = NULL;
4006                 kfree(request);
4007         }
4008
4009         return err;
4010 }
4011
4012 static int nl80211_start_sched_scan(struct sk_buff *skb,
4013                                     struct genl_info *info)
4014 {
4015         struct cfg80211_sched_scan_request *request;
4016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4017         struct net_device *dev = info->user_ptr[1];
4018         struct nlattr *attr;
4019         struct wiphy *wiphy;
4020         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4021         u32 interval;
4022         enum ieee80211_band band;
4023         size_t ie_len;
4024         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4025
4026         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4027             !rdev->ops->sched_scan_start)
4028                 return -EOPNOTSUPP;
4029
4030         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4031                 return -EINVAL;
4032
4033         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4034                 return -EINVAL;
4035
4036         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4037         if (interval == 0)
4038                 return -EINVAL;
4039
4040         wiphy = &rdev->wiphy;
4041
4042         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4043                 n_channels = validate_scan_freqs(
4044                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4045                 if (!n_channels)
4046                         return -EINVAL;
4047         } else {
4048                 n_channels = 0;
4049
4050                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4051                         if (wiphy->bands[band])
4052                                 n_channels += wiphy->bands[band]->n_channels;
4053         }
4054
4055         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4056                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4057                                     tmp)
4058                         n_ssids++;
4059
4060         if (n_ssids > wiphy->max_sched_scan_ssids)
4061                 return -EINVAL;
4062
4063         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4064                 nla_for_each_nested(attr,
4065                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4066                                     tmp)
4067                         n_match_sets++;
4068
4069         if (n_match_sets > wiphy->max_match_sets)
4070                 return -EINVAL;
4071
4072         if (info->attrs[NL80211_ATTR_IE])
4073                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4074         else
4075                 ie_len = 0;
4076
4077         if (ie_len > wiphy->max_sched_scan_ie_len)
4078                 return -EINVAL;
4079
4080         mutex_lock(&rdev->sched_scan_mtx);
4081
4082         if (rdev->sched_scan_req) {
4083                 err = -EINPROGRESS;
4084                 goto out;
4085         }
4086
4087         request = kzalloc(sizeof(*request)
4088                         + sizeof(*request->ssids) * n_ssids
4089                         + sizeof(*request->match_sets) * n_match_sets
4090                         + sizeof(*request->channels) * n_channels
4091                         + ie_len, GFP_KERNEL);
4092         if (!request) {
4093                 err = -ENOMEM;
4094                 goto out;
4095         }
4096
4097         if (n_ssids)
4098                 request->ssids = (void *)&request->channels[n_channels];
4099         request->n_ssids = n_ssids;
4100         if (ie_len) {
4101                 if (request->ssids)
4102                         request->ie = (void *)(request->ssids + n_ssids);
4103                 else
4104                         request->ie = (void *)(request->channels + n_channels);
4105         }
4106
4107         if (n_match_sets) {
4108                 if (request->ie)
4109                         request->match_sets = (void *)(request->ie + ie_len);
4110                 else if (request->ssids)
4111                         request->match_sets =
4112                                 (void *)(request->ssids + n_ssids);
4113                 else
4114                         request->match_sets =
4115                                 (void *)(request->channels + n_channels);
4116         }
4117         request->n_match_sets = n_match_sets;
4118
4119         i = 0;
4120         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4121                 /* user specified, bail out if channel not found */
4122                 nla_for_each_nested(attr,
4123                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4124                                     tmp) {
4125                         struct ieee80211_channel *chan;
4126
4127                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4128
4129                         if (!chan) {
4130                                 err = -EINVAL;
4131                                 goto out_free;
4132                         }
4133
4134                         /* ignore disabled channels */
4135                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4136                                 continue;
4137
4138                         request->channels[i] = chan;
4139                         i++;
4140                 }
4141         } else {
4142                 /* all channels */
4143                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4144                         int j;
4145                         if (!wiphy->bands[band])
4146                                 continue;
4147                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4148                                 struct ieee80211_channel *chan;
4149
4150                                 chan = &wiphy->bands[band]->channels[j];
4151
4152                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4153                                         continue;
4154
4155                                 request->channels[i] = chan;
4156                                 i++;
4157                         }
4158                 }
4159         }
4160
4161         if (!i) {
4162                 err = -EINVAL;
4163                 goto out_free;
4164         }
4165
4166         request->n_channels = i;
4167
4168         i = 0;
4169         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4170                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4171                                     tmp) {
4172                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4173                                 err = -EINVAL;
4174                                 goto out_free;
4175                         }
4176                         request->ssids[i].ssid_len = nla_len(attr);
4177                         memcpy(request->ssids[i].ssid, nla_data(attr),
4178                                nla_len(attr));
4179                         i++;
4180                 }
4181         }
4182
4183         i = 0;
4184         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4185                 nla_for_each_nested(attr,
4186                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4187                                     tmp) {
4188                         struct nlattr *ssid;
4189
4190                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4191                                   nla_data(attr), nla_len(attr),
4192                                   nl80211_match_policy);
4193                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4194                         if (ssid) {
4195                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4196                                         err = -EINVAL;
4197                                         goto out_free;
4198                                 }
4199                                 memcpy(request->match_sets[i].ssid.ssid,
4200                                        nla_data(ssid), nla_len(ssid));
4201                                 request->match_sets[i].ssid.ssid_len =
4202                                         nla_len(ssid);
4203                         }
4204                         i++;
4205                 }
4206         }
4207
4208         if (info->attrs[NL80211_ATTR_IE]) {
4209                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4210                 memcpy((void *)request->ie,
4211                        nla_data(info->attrs[NL80211_ATTR_IE]),
4212                        request->ie_len);
4213         }
4214
4215         request->dev = dev;
4216         request->wiphy = &rdev->wiphy;
4217         request->interval = interval;
4218
4219         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4220         if (!err) {
4221                 rdev->sched_scan_req = request;
4222                 nl80211_send_sched_scan(rdev, dev,
4223                                         NL80211_CMD_START_SCHED_SCAN);
4224                 goto out;
4225         }
4226
4227 out_free:
4228         kfree(request);
4229 out:
4230         mutex_unlock(&rdev->sched_scan_mtx);
4231         return err;
4232 }
4233
4234 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4235                                    struct genl_info *info)
4236 {
4237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4238         int err;
4239
4240         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4241             !rdev->ops->sched_scan_stop)
4242                 return -EOPNOTSUPP;
4243
4244         mutex_lock(&rdev->sched_scan_mtx);
4245         err = __cfg80211_stop_sched_scan(rdev, false);
4246         mutex_unlock(&rdev->sched_scan_mtx);
4247
4248         return err;
4249 }
4250
4251 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4252                             u32 seq, int flags,
4253                             struct cfg80211_registered_device *rdev,
4254                             struct wireless_dev *wdev,
4255                             struct cfg80211_internal_bss *intbss)
4256 {
4257         struct cfg80211_bss *res = &intbss->pub;
4258         void *hdr;
4259         struct nlattr *bss;
4260
4261         ASSERT_WDEV_LOCK(wdev);
4262
4263         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4264                              NL80211_CMD_NEW_SCAN_RESULTS);
4265         if (!hdr)
4266                 return -1;
4267
4268         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4269
4270         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4271             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4272                 goto nla_put_failure;
4273
4274         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4275         if (!bss)
4276                 goto nla_put_failure;
4277         if ((!is_zero_ether_addr(res->bssid) &&
4278              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4279             (res->information_elements && res->len_information_elements &&
4280              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4281                      res->len_information_elements,
4282                      res->information_elements)) ||
4283             (res->beacon_ies && res->len_beacon_ies &&
4284              res->beacon_ies != res->information_elements &&
4285              nla_put(msg, NL80211_BSS_BEACON_IES,
4286                      res->len_beacon_ies, res->beacon_ies)))
4287                 goto nla_put_failure;
4288         if (res->tsf &&
4289             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4290                 goto nla_put_failure;
4291         if (res->beacon_interval &&
4292             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4293                 goto nla_put_failure;
4294         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4295             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4296             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4297                         jiffies_to_msecs(jiffies - intbss->ts)))
4298                 goto nla_put_failure;
4299
4300         switch (rdev->wiphy.signal_type) {
4301         case CFG80211_SIGNAL_TYPE_MBM:
4302                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4303                         goto nla_put_failure;
4304                 break;
4305         case CFG80211_SIGNAL_TYPE_UNSPEC:
4306                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4307                         goto nla_put_failure;
4308                 break;
4309         default:
4310                 break;
4311         }
4312
4313         switch (wdev->iftype) {
4314         case NL80211_IFTYPE_P2P_CLIENT:
4315         case NL80211_IFTYPE_STATION:
4316                 if (intbss == wdev->current_bss &&
4317                     nla_put_u32(msg, NL80211_BSS_STATUS,
4318                                 NL80211_BSS_STATUS_ASSOCIATED))
4319                         goto nla_put_failure;
4320                 break;
4321         case NL80211_IFTYPE_ADHOC:
4322                 if (intbss == wdev->current_bss &&
4323                     nla_put_u32(msg, NL80211_BSS_STATUS,
4324                                 NL80211_BSS_STATUS_IBSS_JOINED))
4325                         goto nla_put_failure;
4326                 break;
4327         default:
4328                 break;
4329         }
4330
4331         nla_nest_end(msg, bss);
4332
4333         return genlmsg_end(msg, hdr);
4334
4335  nla_put_failure:
4336         genlmsg_cancel(msg, hdr);
4337         return -EMSGSIZE;
4338 }
4339
4340 static int nl80211_dump_scan(struct sk_buff *skb,
4341                              struct netlink_callback *cb)
4342 {
4343         struct cfg80211_registered_device *rdev;
4344         struct net_device *dev;
4345         struct cfg80211_internal_bss *scan;
4346         struct wireless_dev *wdev;
4347         int start = cb->args[1], idx = 0;
4348         int err;
4349
4350         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4351         if (err)
4352                 return err;
4353
4354         wdev = dev->ieee80211_ptr;
4355
4356         wdev_lock(wdev);
4357         spin_lock_bh(&rdev->bss_lock);
4358         cfg80211_bss_expire(rdev);
4359
4360         cb->seq = rdev->bss_generation;
4361
4362         list_for_each_entry(scan, &rdev->bss_list, list) {
4363                 if (++idx <= start)
4364                         continue;
4365                 if (nl80211_send_bss(skb, cb,
4366                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4367                                 rdev, wdev, scan) < 0) {
4368                         idx--;
4369                         break;
4370                 }
4371         }
4372
4373         spin_unlock_bh(&rdev->bss_lock);
4374         wdev_unlock(wdev);
4375
4376         cb->args[1] = idx;
4377         nl80211_finish_netdev_dump(rdev);
4378
4379         return skb->len;
4380 }
4381
4382 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4383                                 int flags, struct net_device *dev,
4384                                 struct survey_info *survey)
4385 {
4386         void *hdr;
4387         struct nlattr *infoattr;
4388
4389         hdr = nl80211hdr_put(msg, pid, seq, flags,
4390                              NL80211_CMD_NEW_SURVEY_RESULTS);
4391         if (!hdr)
4392                 return -ENOMEM;
4393
4394         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4395                 goto nla_put_failure;
4396
4397         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4398         if (!infoattr)
4399                 goto nla_put_failure;
4400
4401         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4402                         survey->channel->center_freq))
4403                 goto nla_put_failure;
4404
4405         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4406             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4407                 goto nla_put_failure;
4408         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4409             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4410                 goto nla_put_failure;
4411         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4412             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4413                         survey->channel_time))
4414                 goto nla_put_failure;
4415         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4416             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4417                         survey->channel_time_busy))
4418                 goto nla_put_failure;
4419         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4420             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4421                         survey->channel_time_ext_busy))
4422                 goto nla_put_failure;
4423         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4424             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4425                         survey->channel_time_rx))
4426                 goto nla_put_failure;
4427         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4428             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4429                         survey->channel_time_tx))
4430                 goto nla_put_failure;
4431
4432         nla_nest_end(msg, infoattr);
4433
4434         return genlmsg_end(msg, hdr);
4435
4436  nla_put_failure:
4437         genlmsg_cancel(msg, hdr);
4438         return -EMSGSIZE;
4439 }
4440
4441 static int nl80211_dump_survey(struct sk_buff *skb,
4442                         struct netlink_callback *cb)
4443 {
4444         struct survey_info survey;
4445         struct cfg80211_registered_device *dev;
4446         struct net_device *netdev;
4447         int survey_idx = cb->args[1];
4448         int res;
4449
4450         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4451         if (res)
4452                 return res;
4453
4454         if (!dev->ops->dump_survey) {
4455                 res = -EOPNOTSUPP;
4456                 goto out_err;
4457         }
4458
4459         while (1) {
4460                 struct ieee80211_channel *chan;
4461
4462                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4463                                             &survey);
4464                 if (res == -ENOENT)
4465                         break;
4466                 if (res)
4467                         goto out_err;
4468
4469                 /* Survey without a channel doesn't make sense */
4470                 if (!survey.channel) {
4471                         res = -EINVAL;
4472                         goto out;
4473                 }
4474
4475                 chan = ieee80211_get_channel(&dev->wiphy,
4476                                              survey.channel->center_freq);
4477                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4478                         survey_idx++;
4479                         continue;
4480                 }
4481
4482                 if (nl80211_send_survey(skb,
4483                                 NETLINK_CB(cb->skb).pid,
4484                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4485                                 netdev,
4486                                 &survey) < 0)
4487                         goto out;
4488                 survey_idx++;
4489         }
4490
4491  out:
4492         cb->args[1] = survey_idx;
4493         res = skb->len;
4494  out_err:
4495         nl80211_finish_netdev_dump(dev);
4496         return res;
4497 }
4498
4499 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4500 {
4501         return auth_type <= NL80211_AUTHTYPE_MAX;
4502 }
4503
4504 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4505 {
4506         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4507                                   NL80211_WPA_VERSION_2));
4508 }
4509
4510 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4511 {
4512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4513         struct net_device *dev = info->user_ptr[1];
4514         struct ieee80211_channel *chan;
4515         const u8 *bssid, *ssid, *ie = NULL;
4516         int err, ssid_len, ie_len = 0;
4517         enum nl80211_auth_type auth_type;
4518         struct key_parse key;
4519         bool local_state_change;
4520
4521         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4522                 return -EINVAL;
4523
4524         if (!info->attrs[NL80211_ATTR_MAC])
4525                 return -EINVAL;
4526
4527         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4528                 return -EINVAL;
4529
4530         if (!info->attrs[NL80211_ATTR_SSID])
4531                 return -EINVAL;
4532
4533         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4534                 return -EINVAL;
4535
4536         err = nl80211_parse_key(info, &key);
4537         if (err)
4538                 return err;
4539
4540         if (key.idx >= 0) {
4541                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4542                         return -EINVAL;
4543                 if (!key.p.key || !key.p.key_len)
4544                         return -EINVAL;
4545                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4546                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4547                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4548                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4549                         return -EINVAL;
4550                 if (key.idx > 4)
4551                         return -EINVAL;
4552         } else {
4553                 key.p.key_len = 0;
4554                 key.p.key = NULL;
4555         }
4556
4557         if (key.idx >= 0) {
4558                 int i;
4559                 bool ok = false;
4560                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4561                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4562                                 ok = true;
4563                                 break;
4564                         }
4565                 }
4566                 if (!ok)
4567                         return -EINVAL;
4568         }
4569
4570         if (!rdev->ops->auth)
4571                 return -EOPNOTSUPP;
4572
4573         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4574             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4575                 return -EOPNOTSUPP;
4576
4577         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4578         chan = ieee80211_get_channel(&rdev->wiphy,
4579                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4580         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4581                 return -EINVAL;
4582
4583         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4584         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4585
4586         if (info->attrs[NL80211_ATTR_IE]) {
4587                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4588                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4589         }
4590
4591         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4592         if (!nl80211_valid_auth_type(auth_type))
4593                 return -EINVAL;
4594
4595         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4596
4597         /*
4598          * Since we no longer track auth state, ignore
4599          * requests to only change local state.
4600          */
4601         if (local_state_change)
4602                 return 0;
4603
4604         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4605                                   ssid, ssid_len, ie, ie_len,
4606                                   key.p.key, key.p.key_len, key.idx);
4607 }
4608
4609 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4610                                    struct genl_info *info,
4611                                    struct cfg80211_crypto_settings *settings,
4612                                    int cipher_limit)
4613 {
4614         memset(settings, 0, sizeof(*settings));
4615
4616         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4617
4618         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4619                 u16 proto;
4620                 proto = nla_get_u16(
4621                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4622                 settings->control_port_ethertype = cpu_to_be16(proto);
4623                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4624                     proto != ETH_P_PAE)
4625                         return -EINVAL;
4626                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4627                         settings->control_port_no_encrypt = true;
4628         } else
4629                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4630
4631         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4632                 void *data;
4633                 int len, i;
4634
4635                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4636                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4637                 settings->n_ciphers_pairwise = len / sizeof(u32);
4638
4639                 if (len % sizeof(u32))
4640                         return -EINVAL;
4641
4642                 if (settings->n_ciphers_pairwise > cipher_limit)
4643                         return -EINVAL;
4644
4645                 memcpy(settings->ciphers_pairwise, data, len);
4646
4647                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4648                         if (!cfg80211_supported_cipher_suite(
4649                                         &rdev->wiphy,
4650                                         settings->ciphers_pairwise[i]))
4651                                 return -EINVAL;
4652         }
4653
4654         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4655                 settings->cipher_group =
4656                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4657                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4658                                                      settings->cipher_group))
4659                         return -EINVAL;
4660         }
4661
4662         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4663                 settings->wpa_versions =
4664                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4665                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4666                         return -EINVAL;
4667         }
4668
4669         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4670                 void *data;
4671                 int len;
4672
4673                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4674                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4675                 settings->n_akm_suites = len / sizeof(u32);
4676
4677                 if (len % sizeof(u32))
4678                         return -EINVAL;
4679
4680                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4681                         return -EINVAL;
4682
4683                 memcpy(settings->akm_suites, data, len);
4684         }
4685
4686         return 0;
4687 }
4688
4689 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4690 {
4691         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4692         struct net_device *dev = info->user_ptr[1];
4693         struct cfg80211_crypto_settings crypto;
4694         struct ieee80211_channel *chan;
4695         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4696         int err, ssid_len, ie_len = 0;
4697         bool use_mfp = false;
4698         u32 flags = 0;
4699         struct ieee80211_ht_cap *ht_capa = NULL;
4700         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4701
4702         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4703                 return -EINVAL;
4704
4705         if (!info->attrs[NL80211_ATTR_MAC] ||
4706             !info->attrs[NL80211_ATTR_SSID] ||
4707             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4708                 return -EINVAL;
4709
4710         if (!rdev->ops->assoc)
4711                 return -EOPNOTSUPP;
4712
4713         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4714             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4715                 return -EOPNOTSUPP;
4716
4717         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4718
4719         chan = ieee80211_get_channel(&rdev->wiphy,
4720                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4721         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4722                 return -EINVAL;
4723
4724         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4725         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4726
4727         if (info->attrs[NL80211_ATTR_IE]) {
4728                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4729                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4730         }
4731
4732         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4733                 enum nl80211_mfp mfp =
4734                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4735                 if (mfp == NL80211_MFP_REQUIRED)
4736                         use_mfp = true;
4737                 else if (mfp != NL80211_MFP_NO)
4738                         return -EINVAL;
4739         }
4740
4741         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4742                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4743
4744         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4745                 flags |= ASSOC_REQ_DISABLE_HT;
4746
4747         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4748                 ht_capa_mask =
4749                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4750
4751         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4752                 if (!ht_capa_mask)
4753                         return -EINVAL;
4754                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4755         }
4756
4757         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4758         if (!err)
4759                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4760                                           ssid, ssid_len, ie, ie_len, use_mfp,
4761                                           &crypto, flags, ht_capa,
4762                                           ht_capa_mask);
4763
4764         return err;
4765 }
4766
4767 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4768 {
4769         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4770         struct net_device *dev = info->user_ptr[1];
4771         const u8 *ie = NULL, *bssid;
4772         int ie_len = 0;
4773         u16 reason_code;
4774         bool local_state_change;
4775
4776         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4777                 return -EINVAL;
4778
4779         if (!info->attrs[NL80211_ATTR_MAC])
4780                 return -EINVAL;
4781
4782         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4783                 return -EINVAL;
4784
4785         if (!rdev->ops->deauth)
4786                 return -EOPNOTSUPP;
4787
4788         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4789             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4790                 return -EOPNOTSUPP;
4791
4792         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4793
4794         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4795         if (reason_code == 0) {
4796                 /* Reason Code 0 is reserved */
4797                 return -EINVAL;
4798         }
4799
4800         if (info->attrs[NL80211_ATTR_IE]) {
4801                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4802                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4803         }
4804
4805         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4806
4807         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4808                                     local_state_change);
4809 }
4810
4811 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4812 {
4813         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4814         struct net_device *dev = info->user_ptr[1];
4815         const u8 *ie = NULL, *bssid;
4816         int ie_len = 0;
4817         u16 reason_code;
4818         bool local_state_change;
4819
4820         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4821                 return -EINVAL;
4822
4823         if (!info->attrs[NL80211_ATTR_MAC])
4824                 return -EINVAL;
4825
4826         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4827                 return -EINVAL;
4828
4829         if (!rdev->ops->disassoc)
4830                 return -EOPNOTSUPP;
4831
4832         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4833             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4834                 return -EOPNOTSUPP;
4835
4836         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4837
4838         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4839         if (reason_code == 0) {
4840                 /* Reason Code 0 is reserved */
4841                 return -EINVAL;
4842         }
4843
4844         if (info->attrs[NL80211_ATTR_IE]) {
4845                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4846                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4847         }
4848
4849         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4850
4851         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4852                                       local_state_change);
4853 }
4854
4855 static bool
4856 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4857                          int mcast_rate[IEEE80211_NUM_BANDS],
4858                          int rateval)
4859 {
4860         struct wiphy *wiphy = &rdev->wiphy;
4861         bool found = false;
4862         int band, i;
4863
4864         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4865                 struct ieee80211_supported_band *sband;
4866
4867                 sband = wiphy->bands[band];
4868                 if (!sband)
4869                         continue;
4870
4871                 for (i = 0; i < sband->n_bitrates; i++) {
4872                         if (sband->bitrates[i].bitrate == rateval) {
4873                                 mcast_rate[band] = i + 1;
4874                                 found = true;
4875                                 break;
4876                         }
4877                 }
4878         }
4879
4880         return found;
4881 }
4882
4883 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4884 {
4885         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4886         struct net_device *dev = info->user_ptr[1];
4887         struct cfg80211_ibss_params ibss;
4888         struct wiphy *wiphy;
4889         struct cfg80211_cached_keys *connkeys = NULL;
4890         int err;
4891
4892         memset(&ibss, 0, sizeof(ibss));
4893
4894         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4895                 return -EINVAL;
4896
4897         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4898             !info->attrs[NL80211_ATTR_SSID] ||
4899             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4900                 return -EINVAL;
4901
4902         ibss.beacon_interval = 100;
4903
4904         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4905                 ibss.beacon_interval =
4906                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4907                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4908                         return -EINVAL;
4909         }
4910
4911         if (!rdev->ops->join_ibss)
4912                 return -EOPNOTSUPP;
4913
4914         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4915                 return -EOPNOTSUPP;
4916
4917         wiphy = &rdev->wiphy;
4918
4919         if (info->attrs[NL80211_ATTR_MAC]) {
4920                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4921
4922                 if (!is_valid_ether_addr(ibss.bssid))
4923                         return -EINVAL;
4924         }
4925         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4926         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4927
4928         if (info->attrs[NL80211_ATTR_IE]) {
4929                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4930                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4931         }
4932
4933         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4934                 enum nl80211_channel_type channel_type;
4935
4936                 if (!nl80211_valid_channel_type(info, &channel_type))
4937                         return -EINVAL;
4938
4939                 if (channel_type != NL80211_CHAN_NO_HT &&
4940                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4941                         return -EINVAL;
4942
4943                 ibss.channel_type = channel_type;
4944         } else {
4945                 ibss.channel_type = NL80211_CHAN_NO_HT;
4946         }
4947
4948         ibss.channel = rdev_freq_to_chan(rdev,
4949                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4950                 ibss.channel_type);
4951         if (!ibss.channel ||
4952             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4953             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4954                 return -EINVAL;
4955
4956         /* Both channels should be able to initiate communication */
4957         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4958              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4959             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4960                                           ibss.channel_type))
4961                 return -EINVAL;
4962
4963         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4964         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4965
4966         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4967                 u8 *rates =
4968                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4969                 int n_rates =
4970                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4971                 struct ieee80211_supported_band *sband =
4972                         wiphy->bands[ibss.channel->band];
4973
4974                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4975                                              &ibss.basic_rates);
4976                 if (err)
4977                         return err;
4978         }
4979
4980         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4981             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4982                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4983                 return -EINVAL;
4984
4985         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4986                 connkeys = nl80211_parse_connkeys(rdev,
4987                                         info->attrs[NL80211_ATTR_KEYS]);
4988                 if (IS_ERR(connkeys))
4989                         return PTR_ERR(connkeys);
4990         }
4991
4992         ibss.control_port =
4993                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4994
4995         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4996         if (err)
4997                 kfree(connkeys);
4998         return err;
4999 }
5000
5001 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5002 {
5003         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5004         struct net_device *dev = info->user_ptr[1];
5005
5006         if (!rdev->ops->leave_ibss)
5007                 return -EOPNOTSUPP;
5008
5009         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5010                 return -EOPNOTSUPP;
5011
5012         return cfg80211_leave_ibss(rdev, dev, false);
5013 }
5014
5015 #ifdef CONFIG_NL80211_TESTMODE
5016 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5017         .name = "testmode",
5018 };
5019
5020 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5021 {
5022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5023         int err;
5024
5025         if (!info->attrs[NL80211_ATTR_TESTDATA])
5026                 return -EINVAL;
5027
5028         err = -EOPNOTSUPP;
5029         if (rdev->ops->testmode_cmd) {
5030                 rdev->testmode_info = info;
5031                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5032                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5033                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5034                 rdev->testmode_info = NULL;
5035         }
5036
5037         return err;
5038 }
5039
5040 static int nl80211_testmode_dump(struct sk_buff *skb,
5041                                  struct netlink_callback *cb)
5042 {
5043         struct cfg80211_registered_device *rdev;
5044         int err;
5045         long phy_idx;
5046         void *data = NULL;
5047         int data_len = 0;
5048
5049         if (cb->args[0]) {
5050                 /*
5051                  * 0 is a valid index, but not valid for args[0],
5052                  * so we need to offset by 1.
5053                  */
5054                 phy_idx = cb->args[0] - 1;
5055         } else {
5056                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5057                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5058                                   nl80211_policy);
5059                 if (err)
5060                         return err;
5061                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
5062                         phy_idx = nla_get_u32(
5063                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
5064                 } else {
5065                         struct net_device *netdev;
5066
5067                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
5068                                                       nl80211_fam.attrbuf,
5069                                                       &rdev, &netdev);
5070                         if (err)
5071                                 return err;
5072                         dev_put(netdev);
5073                         phy_idx = rdev->wiphy_idx;
5074                         cfg80211_unlock_rdev(rdev);
5075                 }
5076                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5077                         cb->args[1] =
5078                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5079         }
5080
5081         if (cb->args[1]) {
5082                 data = nla_data((void *)cb->args[1]);
5083                 data_len = nla_len((void *)cb->args[1]);
5084         }
5085
5086         mutex_lock(&cfg80211_mutex);
5087         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5088         if (!rdev) {
5089                 mutex_unlock(&cfg80211_mutex);
5090                 return -ENOENT;
5091         }
5092         cfg80211_lock_rdev(rdev);
5093         mutex_unlock(&cfg80211_mutex);
5094
5095         if (!rdev->ops->testmode_dump) {
5096                 err = -EOPNOTSUPP;
5097                 goto out_err;
5098         }
5099
5100         while (1) {
5101                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5102                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5103                                            NL80211_CMD_TESTMODE);
5104                 struct nlattr *tmdata;
5105
5106                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5107                         genlmsg_cancel(skb, hdr);
5108                         break;
5109                 }
5110
5111                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5112                 if (!tmdata) {
5113                         genlmsg_cancel(skb, hdr);
5114                         break;
5115                 }
5116                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5117                                                data, data_len);
5118                 nla_nest_end(skb, tmdata);
5119
5120                 if (err == -ENOBUFS || err == -ENOENT) {
5121                         genlmsg_cancel(skb, hdr);
5122                         break;
5123                 } else if (err) {
5124                         genlmsg_cancel(skb, hdr);
5125                         goto out_err;
5126                 }
5127
5128                 genlmsg_end(skb, hdr);
5129         }
5130
5131         err = skb->len;
5132         /* see above */
5133         cb->args[0] = phy_idx + 1;
5134  out_err:
5135         cfg80211_unlock_rdev(rdev);
5136         return err;
5137 }
5138
5139 static struct sk_buff *
5140 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5141                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5142 {
5143         struct sk_buff *skb;
5144         void *hdr;
5145         struct nlattr *data;
5146
5147         skb = nlmsg_new(approxlen + 100, gfp);
5148         if (!skb)
5149                 return NULL;
5150
5151         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5152         if (!hdr) {
5153                 kfree_skb(skb);
5154                 return NULL;
5155         }
5156
5157         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5158                 goto nla_put_failure;
5159         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5160
5161         ((void **)skb->cb)[0] = rdev;
5162         ((void **)skb->cb)[1] = hdr;
5163         ((void **)skb->cb)[2] = data;
5164
5165         return skb;
5166
5167  nla_put_failure:
5168         kfree_skb(skb);
5169         return NULL;
5170 }
5171
5172 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5173                                                   int approxlen)
5174 {
5175         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5176
5177         if (WARN_ON(!rdev->testmode_info))
5178                 return NULL;
5179
5180         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5181                                 rdev->testmode_info->snd_pid,
5182                                 rdev->testmode_info->snd_seq,
5183                                 GFP_KERNEL);
5184 }
5185 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5186
5187 int cfg80211_testmode_reply(struct sk_buff *skb)
5188 {
5189         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5190         void *hdr = ((void **)skb->cb)[1];
5191         struct nlattr *data = ((void **)skb->cb)[2];
5192
5193         if (WARN_ON(!rdev->testmode_info)) {
5194                 kfree_skb(skb);
5195                 return -EINVAL;
5196         }
5197
5198         nla_nest_end(skb, data);
5199         genlmsg_end(skb, hdr);
5200         return genlmsg_reply(skb, rdev->testmode_info);
5201 }
5202 EXPORT_SYMBOL(cfg80211_testmode_reply);
5203
5204 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5205                                                   int approxlen, gfp_t gfp)
5206 {
5207         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5208
5209         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5210 }
5211 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5212
5213 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5214 {
5215         void *hdr = ((void **)skb->cb)[1];
5216         struct nlattr *data = ((void **)skb->cb)[2];
5217
5218         nla_nest_end(skb, data);
5219         genlmsg_end(skb, hdr);
5220         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5221 }
5222 EXPORT_SYMBOL(cfg80211_testmode_event);
5223 #endif
5224
5225 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5226 {
5227         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5228         struct net_device *dev = info->user_ptr[1];
5229         struct cfg80211_connect_params connect;
5230         struct wiphy *wiphy;
5231         struct cfg80211_cached_keys *connkeys = NULL;
5232         int err;
5233
5234         memset(&connect, 0, sizeof(connect));
5235
5236         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5237                 return -EINVAL;
5238
5239         if (!info->attrs[NL80211_ATTR_SSID] ||
5240             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5241                 return -EINVAL;
5242
5243         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5244                 connect.auth_type =
5245                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5246                 if (!nl80211_valid_auth_type(connect.auth_type))
5247                         return -EINVAL;
5248         } else
5249                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5250
5251         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5252
5253         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5254                                       NL80211_MAX_NR_CIPHER_SUITES);
5255         if (err)
5256                 return err;
5257
5258         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5259             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5260                 return -EOPNOTSUPP;
5261
5262         wiphy = &rdev->wiphy;
5263
5264         connect.bg_scan_period = -1;
5265         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5266                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5267                 connect.bg_scan_period =
5268                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5269         }
5270
5271         if (info->attrs[NL80211_ATTR_MAC])
5272                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5273         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5274         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5275
5276         if (info->attrs[NL80211_ATTR_IE]) {
5277                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5278                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5279         }
5280
5281         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5282                 connect.channel =
5283                         ieee80211_get_channel(wiphy,
5284                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5285                 if (!connect.channel ||
5286                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5287                         return -EINVAL;
5288         }
5289
5290         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5291                 connkeys = nl80211_parse_connkeys(rdev,
5292                                         info->attrs[NL80211_ATTR_KEYS]);
5293                 if (IS_ERR(connkeys))
5294                         return PTR_ERR(connkeys);
5295         }
5296
5297         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5298                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5299
5300         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5301                 memcpy(&connect.ht_capa_mask,
5302                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5303                        sizeof(connect.ht_capa_mask));
5304
5305         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5306                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5307                         return -EINVAL;
5308                 memcpy(&connect.ht_capa,
5309                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5310                        sizeof(connect.ht_capa));
5311         }
5312
5313         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5314         if (err)
5315                 kfree(connkeys);
5316         return err;
5317 }
5318
5319 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5320 {
5321         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5322         struct net_device *dev = info->user_ptr[1];
5323         u16 reason;
5324
5325         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5326                 reason = WLAN_REASON_DEAUTH_LEAVING;
5327         else
5328                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5329
5330         if (reason == 0)
5331                 return -EINVAL;
5332
5333         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5334             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5335                 return -EOPNOTSUPP;
5336
5337         return cfg80211_disconnect(rdev, dev, reason, true);
5338 }
5339
5340 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5341 {
5342         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5343         struct net *net;
5344         int err;
5345         u32 pid;
5346
5347         if (!info->attrs[NL80211_ATTR_PID])
5348                 return -EINVAL;
5349
5350         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5351
5352         net = get_net_ns_by_pid(pid);
5353         if (IS_ERR(net))
5354                 return PTR_ERR(net);
5355
5356         err = 0;
5357
5358         /* check if anything to do */
5359         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5360                 err = cfg80211_switch_netns(rdev, net);
5361
5362         put_net(net);
5363         return err;
5364 }
5365
5366 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5367 {
5368         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5369         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5370                         struct cfg80211_pmksa *pmksa) = NULL;
5371         struct net_device *dev = info->user_ptr[1];
5372         struct cfg80211_pmksa pmksa;
5373
5374         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5375
5376         if (!info->attrs[NL80211_ATTR_MAC])
5377                 return -EINVAL;
5378
5379         if (!info->attrs[NL80211_ATTR_PMKID])
5380                 return -EINVAL;
5381
5382         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5383         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5384
5385         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5386             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5387                 return -EOPNOTSUPP;
5388
5389         switch (info->genlhdr->cmd) {
5390         case NL80211_CMD_SET_PMKSA:
5391                 rdev_ops = rdev->ops->set_pmksa;
5392                 break;
5393         case NL80211_CMD_DEL_PMKSA:
5394                 rdev_ops = rdev->ops->del_pmksa;
5395                 break;
5396         default:
5397                 WARN_ON(1);
5398                 break;
5399         }
5400
5401         if (!rdev_ops)
5402                 return -EOPNOTSUPP;
5403
5404         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5405 }
5406
5407 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5408 {
5409         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5410         struct net_device *dev = info->user_ptr[1];
5411
5412         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5413             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5414                 return -EOPNOTSUPP;
5415
5416         if (!rdev->ops->flush_pmksa)
5417                 return -EOPNOTSUPP;
5418
5419         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5420 }
5421
5422 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5423 {
5424         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5425         struct net_device *dev = info->user_ptr[1];
5426         u8 action_code, dialog_token;
5427         u16 status_code;
5428         u8 *peer;
5429
5430         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5431             !rdev->ops->tdls_mgmt)
5432                 return -EOPNOTSUPP;
5433
5434         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5435             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5436             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5437             !info->attrs[NL80211_ATTR_IE] ||
5438             !info->attrs[NL80211_ATTR_MAC])
5439                 return -EINVAL;
5440
5441         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5442         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5443         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5444         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5445
5446         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5447                                     dialog_token, status_code,
5448                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5449                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5450 }
5451
5452 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5453 {
5454         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5455         struct net_device *dev = info->user_ptr[1];
5456         enum nl80211_tdls_operation operation;
5457         u8 *peer;
5458
5459         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5460             !rdev->ops->tdls_oper)
5461                 return -EOPNOTSUPP;
5462
5463         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5464             !info->attrs[NL80211_ATTR_MAC])
5465                 return -EINVAL;
5466
5467         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5468         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5469
5470         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5471 }
5472
5473 static int nl80211_remain_on_channel(struct sk_buff *skb,
5474                                      struct genl_info *info)
5475 {
5476         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5477         struct net_device *dev = info->user_ptr[1];
5478         struct ieee80211_channel *chan;
5479         struct sk_buff *msg;
5480         void *hdr;
5481         u64 cookie;
5482         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5483         u32 freq, duration;
5484         int err;
5485
5486         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5487             !info->attrs[NL80211_ATTR_DURATION])
5488                 return -EINVAL;
5489
5490         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5491
5492         /*
5493          * We should be on that channel for at least one jiffie,
5494          * and more than 5 seconds seems excessive.
5495          */
5496         if (!duration || !msecs_to_jiffies(duration) ||
5497             duration > rdev->wiphy.max_remain_on_channel_duration)
5498                 return -EINVAL;
5499
5500         if (!rdev->ops->remain_on_channel ||
5501             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5502                 return -EOPNOTSUPP;
5503
5504         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5505             !nl80211_valid_channel_type(info, &channel_type))
5506                 return -EINVAL;
5507
5508         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5509         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5510         if (chan == NULL)
5511                 return -EINVAL;
5512
5513         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5514         if (!msg)
5515                 return -ENOMEM;
5516
5517         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5518                              NL80211_CMD_REMAIN_ON_CHANNEL);
5519
5520         if (IS_ERR(hdr)) {
5521                 err = PTR_ERR(hdr);
5522                 goto free_msg;
5523         }
5524
5525         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5526                                            channel_type, duration, &cookie);
5527
5528         if (err)
5529                 goto free_msg;
5530
5531         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5532                 goto nla_put_failure;
5533
5534         genlmsg_end(msg, hdr);
5535
5536         return genlmsg_reply(msg, info);
5537
5538  nla_put_failure:
5539         err = -ENOBUFS;
5540  free_msg:
5541         nlmsg_free(msg);
5542         return err;
5543 }
5544
5545 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5546                                             struct genl_info *info)
5547 {
5548         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5549         struct net_device *dev = info->user_ptr[1];
5550         u64 cookie;
5551
5552         if (!info->attrs[NL80211_ATTR_COOKIE])
5553                 return -EINVAL;
5554
5555         if (!rdev->ops->cancel_remain_on_channel)
5556                 return -EOPNOTSUPP;
5557
5558         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5559
5560         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5561 }
5562
5563 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5564                            u8 *rates, u8 rates_len)
5565 {
5566         u8 i;
5567         u32 mask = 0;
5568
5569         for (i = 0; i < rates_len; i++) {
5570                 int rate = (rates[i] & 0x7f) * 5;
5571                 int ridx;
5572                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5573                         struct ieee80211_rate *srate =
5574                                 &sband->bitrates[ridx];
5575                         if (rate == srate->bitrate) {
5576                                 mask |= 1 << ridx;
5577                                 break;
5578                         }
5579                 }
5580                 if (ridx == sband->n_bitrates)
5581                         return 0; /* rate not found */
5582         }
5583
5584         return mask;
5585 }
5586
5587 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5588                                u8 *rates, u8 rates_len,
5589                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5590 {
5591         u8 i;
5592
5593         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5594
5595         for (i = 0; i < rates_len; i++) {
5596                 int ridx, rbit;
5597
5598                 ridx = rates[i] / 8;
5599                 rbit = BIT(rates[i] % 8);
5600
5601                 /* check validity */
5602                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5603                         return false;
5604
5605                 /* check availability */
5606                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5607                         mcs[ridx] |= rbit;
5608                 else
5609                         return false;
5610         }
5611
5612         return true;
5613 }
5614
5615 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5616         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5617                                     .len = NL80211_MAX_SUPP_RATES },
5618         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5619                                  .len = NL80211_MAX_SUPP_HT_RATES },
5620 };
5621
5622 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5623                                        struct genl_info *info)
5624 {
5625         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5626         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5627         struct cfg80211_bitrate_mask mask;
5628         int rem, i;
5629         struct net_device *dev = info->user_ptr[1];
5630         struct nlattr *tx_rates;
5631         struct ieee80211_supported_band *sband;
5632
5633         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5634                 return -EINVAL;
5635
5636         if (!rdev->ops->set_bitrate_mask)
5637                 return -EOPNOTSUPP;
5638
5639         memset(&mask, 0, sizeof(mask));
5640         /* Default to all rates enabled */
5641         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5642                 sband = rdev->wiphy.bands[i];
5643                 mask.control[i].legacy =
5644                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5645                 if (sband)
5646                         memcpy(mask.control[i].mcs,
5647                                sband->ht_cap.mcs.rx_mask,
5648                                sizeof(mask.control[i].mcs));
5649                 else
5650                         memset(mask.control[i].mcs, 0,
5651                                sizeof(mask.control[i].mcs));
5652         }
5653
5654         /*
5655          * The nested attribute uses enum nl80211_band as the index. This maps
5656          * directly to the enum ieee80211_band values used in cfg80211.
5657          */
5658         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5659         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5660         {
5661                 enum ieee80211_band band = nla_type(tx_rates);
5662                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5663                         return -EINVAL;
5664                 sband = rdev->wiphy.bands[band];
5665                 if (sband == NULL)
5666                         return -EINVAL;
5667                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5668                           nla_len(tx_rates), nl80211_txattr_policy);
5669                 if (tb[NL80211_TXRATE_LEGACY]) {
5670                         mask.control[band].legacy = rateset_to_mask(
5671                                 sband,
5672                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5673                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5674                         if ((mask.control[band].legacy == 0) &&
5675                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5676                                 return -EINVAL;
5677                 }
5678                 if (tb[NL80211_TXRATE_MCS]) {
5679                         if (!ht_rateset_to_mask(
5680                                         sband,
5681                                         nla_data(tb[NL80211_TXRATE_MCS]),
5682                                         nla_len(tb[NL80211_TXRATE_MCS]),
5683                                         mask.control[band].mcs))
5684                                 return -EINVAL;
5685                 }
5686
5687                 if (mask.control[band].legacy == 0) {
5688                         /* don't allow empty legacy rates if HT
5689                          * is not even supported. */
5690                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5691                                 return -EINVAL;
5692
5693                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5694                                 if (mask.control[band].mcs[i])
5695                                         break;
5696
5697                         /* legacy and mcs rates may not be both empty */
5698                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5699                                 return -EINVAL;
5700                 }
5701         }
5702
5703         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5704 }
5705
5706 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5707 {
5708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5709         struct net_device *dev = info->user_ptr[1];
5710         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5711
5712         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5713                 return -EINVAL;
5714
5715         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5716                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5717
5718         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5719             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5720             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5721             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5722             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5723             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5724             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5725                 return -EOPNOTSUPP;
5726
5727         /* not much point in registering if we can't reply */
5728         if (!rdev->ops->mgmt_tx)
5729                 return -EOPNOTSUPP;
5730
5731         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5732                         frame_type,
5733                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5734                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5735 }
5736
5737 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5738 {
5739         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5740         struct net_device *dev = info->user_ptr[1];
5741         struct ieee80211_channel *chan;
5742         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5743         bool channel_type_valid = false;
5744         u32 freq;
5745         int err;
5746         void *hdr = NULL;
5747         u64 cookie;
5748         struct sk_buff *msg = NULL;
5749         unsigned int wait = 0;
5750         bool offchan, no_cck, dont_wait_for_ack;
5751
5752         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5753
5754         if (!info->attrs[NL80211_ATTR_FRAME] ||
5755             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5756                 return -EINVAL;
5757
5758         if (!rdev->ops->mgmt_tx)
5759                 return -EOPNOTSUPP;
5760
5761         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5762             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5763             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5764             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5765             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5766             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5767             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5768                 return -EOPNOTSUPP;
5769
5770         if (info->attrs[NL80211_ATTR_DURATION]) {
5771                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5772                         return -EINVAL;
5773                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5774         }
5775
5776         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5777                 if (!nl80211_valid_channel_type(info, &channel_type))
5778                         return -EINVAL;
5779                 channel_type_valid = true;
5780         }
5781
5782         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5783
5784         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5785                 return -EINVAL;
5786
5787         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5788
5789         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5790         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5791         if (chan == NULL)
5792                 return -EINVAL;
5793
5794         if (!dont_wait_for_ack) {
5795                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5796                 if (!msg)
5797                         return -ENOMEM;
5798
5799                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5800                                      NL80211_CMD_FRAME);
5801
5802                 if (IS_ERR(hdr)) {
5803                         err = PTR_ERR(hdr);
5804                         goto free_msg;
5805                 }
5806         }
5807
5808         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5809                                     channel_type_valid, wait,
5810                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5811                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5812                                     no_cck, dont_wait_for_ack, &cookie);
5813         if (err)
5814                 goto free_msg;
5815
5816         if (msg) {
5817                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5818                         goto nla_put_failure;
5819
5820                 genlmsg_end(msg, hdr);
5821                 return genlmsg_reply(msg, info);
5822         }
5823
5824         return 0;
5825
5826  nla_put_failure:
5827         err = -ENOBUFS;
5828  free_msg:
5829         nlmsg_free(msg);
5830         return err;
5831 }
5832
5833 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5834 {
5835         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5836         struct net_device *dev = info->user_ptr[1];
5837         u64 cookie;
5838
5839         if (!info->attrs[NL80211_ATTR_COOKIE])
5840                 return -EINVAL;
5841
5842         if (!rdev->ops->mgmt_tx_cancel_wait)
5843                 return -EOPNOTSUPP;
5844
5845         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5846             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5847             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5848             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5849             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5850             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5851                 return -EOPNOTSUPP;
5852
5853         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5854
5855         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5856 }
5857
5858 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5859 {
5860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5861         struct wireless_dev *wdev;
5862         struct net_device *dev = info->user_ptr[1];
5863         u8 ps_state;
5864         bool state;
5865         int err;
5866
5867         if (!info->attrs[NL80211_ATTR_PS_STATE])
5868                 return -EINVAL;
5869
5870         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5871
5872         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5873                 return -EINVAL;
5874
5875         wdev = dev->ieee80211_ptr;
5876
5877         if (!rdev->ops->set_power_mgmt)
5878                 return -EOPNOTSUPP;
5879
5880         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5881
5882         if (state == wdev->ps)
5883                 return 0;
5884
5885         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5886                                         wdev->ps_timeout);
5887         if (!err)
5888                 wdev->ps = state;
5889         return err;
5890 }
5891
5892 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5893 {
5894         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5895         enum nl80211_ps_state ps_state;
5896         struct wireless_dev *wdev;
5897         struct net_device *dev = info->user_ptr[1];
5898         struct sk_buff *msg;
5899         void *hdr;
5900         int err;
5901
5902         wdev = dev->ieee80211_ptr;
5903
5904         if (!rdev->ops->set_power_mgmt)
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_GET_POWER_SAVE);
5913         if (!hdr) {
5914                 err = -ENOBUFS;
5915                 goto free_msg;
5916         }
5917
5918         if (wdev->ps)
5919                 ps_state = NL80211_PS_ENABLED;
5920         else
5921                 ps_state = NL80211_PS_DISABLED;
5922
5923         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
5924                 goto nla_put_failure;
5925
5926         genlmsg_end(msg, hdr);
5927         return genlmsg_reply(msg, info);
5928
5929  nla_put_failure:
5930         err = -ENOBUFS;
5931  free_msg:
5932         nlmsg_free(msg);
5933         return err;
5934 }
5935
5936 static struct nla_policy
5937 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5938         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5939         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5940         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5941 };
5942
5943 static int nl80211_set_cqm_rssi(struct genl_info *info,
5944                                 s32 threshold, u32 hysteresis)
5945 {
5946         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5947         struct wireless_dev *wdev;
5948         struct net_device *dev = info->user_ptr[1];
5949
5950         if (threshold > 0)
5951                 return -EINVAL;
5952
5953         wdev = dev->ieee80211_ptr;
5954
5955         if (!rdev->ops->set_cqm_rssi_config)
5956                 return -EOPNOTSUPP;
5957
5958         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5959             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5960                 return -EOPNOTSUPP;
5961
5962         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5963                                               threshold, hysteresis);
5964 }
5965
5966 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5967 {
5968         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5969         struct nlattr *cqm;
5970         int err;
5971
5972         cqm = info->attrs[NL80211_ATTR_CQM];
5973         if (!cqm) {
5974                 err = -EINVAL;
5975                 goto out;
5976         }
5977
5978         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5979                                nl80211_attr_cqm_policy);
5980         if (err)
5981                 goto out;
5982
5983         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5984             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5985                 s32 threshold;
5986                 u32 hysteresis;
5987                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5988                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5989                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5990         } else
5991                 err = -EINVAL;
5992
5993 out:
5994         return err;
5995 }
5996
5997 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5998 {
5999         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6000         struct net_device *dev = info->user_ptr[1];
6001         struct mesh_config cfg;
6002         struct mesh_setup setup;
6003         int err;
6004
6005         /* start with default */
6006         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6007         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6008
6009         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6010                 /* and parse parameters if given */
6011                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6012                 if (err)
6013                         return err;
6014         }
6015
6016         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6017             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6018                 return -EINVAL;
6019
6020         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6021         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6022
6023         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6024             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6025                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6026                         return -EINVAL;
6027
6028         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6029                 /* parse additional setup parameters if given */
6030                 err = nl80211_parse_mesh_setup(info, &setup);
6031                 if (err)
6032                         return err;
6033         }
6034
6035         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6036 }
6037
6038 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6039 {
6040         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6041         struct net_device *dev = info->user_ptr[1];
6042
6043         return cfg80211_leave_mesh(rdev, dev);
6044 }
6045
6046 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6047 {
6048         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6049         struct sk_buff *msg;
6050         void *hdr;
6051
6052         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6053                 return -EOPNOTSUPP;
6054
6055         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6056         if (!msg)
6057                 return -ENOMEM;
6058
6059         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6060                              NL80211_CMD_GET_WOWLAN);
6061         if (!hdr)
6062                 goto nla_put_failure;
6063
6064         if (rdev->wowlan) {
6065                 struct nlattr *nl_wowlan;
6066
6067                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6068                 if (!nl_wowlan)
6069                         goto nla_put_failure;
6070
6071                 if ((rdev->wowlan->any &&
6072                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6073                     (rdev->wowlan->disconnect &&
6074                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6075                     (rdev->wowlan->magic_pkt &&
6076                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6077                     (rdev->wowlan->gtk_rekey_failure &&
6078                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6079                     (rdev->wowlan->eap_identity_req &&
6080                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6081                     (rdev->wowlan->four_way_handshake &&
6082                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6083                     (rdev->wowlan->rfkill_release &&
6084                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6085                         goto nla_put_failure;
6086                 if (rdev->wowlan->n_patterns) {
6087                         struct nlattr *nl_pats, *nl_pat;
6088                         int i, pat_len;
6089
6090                         nl_pats = nla_nest_start(msg,
6091                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6092                         if (!nl_pats)
6093                                 goto nla_put_failure;
6094
6095                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6096                                 nl_pat = nla_nest_start(msg, i + 1);
6097                                 if (!nl_pat)
6098                                         goto nla_put_failure;
6099                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6100                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6101                                             DIV_ROUND_UP(pat_len, 8),
6102                                             rdev->wowlan->patterns[i].mask) ||
6103                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6104                                             pat_len,
6105                                             rdev->wowlan->patterns[i].pattern))
6106                                         goto nla_put_failure;
6107                                 nla_nest_end(msg, nl_pat);
6108                         }
6109                         nla_nest_end(msg, nl_pats);
6110                 }
6111
6112                 nla_nest_end(msg, nl_wowlan);
6113         }
6114
6115         genlmsg_end(msg, hdr);
6116         return genlmsg_reply(msg, info);
6117
6118 nla_put_failure:
6119         nlmsg_free(msg);
6120         return -ENOBUFS;
6121 }
6122
6123 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6124 {
6125         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6126         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6127         struct cfg80211_wowlan no_triggers = {};
6128         struct cfg80211_wowlan new_triggers = {};
6129         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6130         int err, i;
6131         bool prev_enabled = rdev->wowlan;
6132
6133         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6134                 return -EOPNOTSUPP;
6135
6136         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6137                 goto no_triggers;
6138
6139         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6140                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6141                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6142                         nl80211_wowlan_policy);
6143         if (err)
6144                 return err;
6145
6146         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6147                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6148                         return -EINVAL;
6149                 new_triggers.any = true;
6150         }
6151
6152         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6153                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6154                         return -EINVAL;
6155                 new_triggers.disconnect = true;
6156         }
6157
6158         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6159                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6160                         return -EINVAL;
6161                 new_triggers.magic_pkt = true;
6162         }
6163
6164         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6165                 return -EINVAL;
6166
6167         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6168                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6169                         return -EINVAL;
6170                 new_triggers.gtk_rekey_failure = true;
6171         }
6172
6173         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6174                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6175                         return -EINVAL;
6176                 new_triggers.eap_identity_req = true;
6177         }
6178
6179         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6180                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6181                         return -EINVAL;
6182                 new_triggers.four_way_handshake = true;
6183         }
6184
6185         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6186                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6187                         return -EINVAL;
6188                 new_triggers.rfkill_release = true;
6189         }
6190
6191         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6192                 struct nlattr *pat;
6193                 int n_patterns = 0;
6194                 int rem, pat_len, mask_len;
6195                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6196
6197                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6198                                     rem)
6199                         n_patterns++;
6200                 if (n_patterns > wowlan->n_patterns)
6201                         return -EINVAL;
6202
6203                 new_triggers.patterns = kcalloc(n_patterns,
6204                                                 sizeof(new_triggers.patterns[0]),
6205                                                 GFP_KERNEL);
6206                 if (!new_triggers.patterns)
6207                         return -ENOMEM;
6208
6209                 new_triggers.n_patterns = n_patterns;
6210                 i = 0;
6211
6212                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6213                                     rem) {
6214                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6215                                   nla_data(pat), nla_len(pat), NULL);
6216                         err = -EINVAL;
6217                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6218                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6219                                 goto error;
6220                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6221                         mask_len = DIV_ROUND_UP(pat_len, 8);
6222                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6223                             mask_len)
6224                                 goto error;
6225                         if (pat_len > wowlan->pattern_max_len ||
6226                             pat_len < wowlan->pattern_min_len)
6227                                 goto error;
6228
6229                         new_triggers.patterns[i].mask =
6230                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6231                         if (!new_triggers.patterns[i].mask) {
6232                                 err = -ENOMEM;
6233                                 goto error;
6234                         }
6235                         new_triggers.patterns[i].pattern =
6236                                 new_triggers.patterns[i].mask + mask_len;
6237                         memcpy(new_triggers.patterns[i].mask,
6238                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6239                                mask_len);
6240                         new_triggers.patterns[i].pattern_len = pat_len;
6241                         memcpy(new_triggers.patterns[i].pattern,
6242                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6243                                pat_len);
6244                         i++;
6245                 }
6246         }
6247
6248         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6249                 struct cfg80211_wowlan *ntrig;
6250                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6251                                 GFP_KERNEL);
6252                 if (!ntrig) {
6253                         err = -ENOMEM;
6254                         goto error;
6255                 }
6256                 cfg80211_rdev_free_wowlan(rdev);
6257                 rdev->wowlan = ntrig;
6258         } else {
6259  no_triggers:
6260                 cfg80211_rdev_free_wowlan(rdev);
6261                 rdev->wowlan = NULL;
6262         }
6263
6264         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6265                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6266
6267         return 0;
6268  error:
6269         for (i = 0; i < new_triggers.n_patterns; i++)
6270                 kfree(new_triggers.patterns[i].mask);
6271         kfree(new_triggers.patterns);
6272         return err;
6273 }
6274
6275 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6276 {
6277         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6278         struct net_device *dev = info->user_ptr[1];
6279         struct wireless_dev *wdev = dev->ieee80211_ptr;
6280         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6281         struct cfg80211_gtk_rekey_data rekey_data;
6282         int err;
6283
6284         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6285                 return -EINVAL;
6286
6287         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6288                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6289                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6290                         nl80211_rekey_policy);
6291         if (err)
6292                 return err;
6293
6294         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6295                 return -ERANGE;
6296         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6297                 return -ERANGE;
6298         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6299                 return -ERANGE;
6300
6301         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6302                NL80211_KEK_LEN);
6303         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6304                NL80211_KCK_LEN);
6305         memcpy(rekey_data.replay_ctr,
6306                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6307                NL80211_REPLAY_CTR_LEN);
6308
6309         wdev_lock(wdev);
6310         if (!wdev->current_bss) {
6311                 err = -ENOTCONN;
6312                 goto out;
6313         }
6314
6315         if (!rdev->ops->set_rekey_data) {
6316                 err = -EOPNOTSUPP;
6317                 goto out;
6318         }
6319
6320         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6321  out:
6322         wdev_unlock(wdev);
6323         return err;
6324 }
6325
6326 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6327                                              struct genl_info *info)
6328 {
6329         struct net_device *dev = info->user_ptr[1];
6330         struct wireless_dev *wdev = dev->ieee80211_ptr;
6331
6332         if (wdev->iftype != NL80211_IFTYPE_AP &&
6333             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6334                 return -EINVAL;
6335
6336         if (wdev->ap_unexpected_nlpid)
6337                 return -EBUSY;
6338
6339         wdev->ap_unexpected_nlpid = info->snd_pid;
6340         return 0;
6341 }
6342
6343 static int nl80211_probe_client(struct sk_buff *skb,
6344                                 struct genl_info *info)
6345 {
6346         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6347         struct net_device *dev = info->user_ptr[1];
6348         struct wireless_dev *wdev = dev->ieee80211_ptr;
6349         struct sk_buff *msg;
6350         void *hdr;
6351         const u8 *addr;
6352         u64 cookie;
6353         int err;
6354
6355         if (wdev->iftype != NL80211_IFTYPE_AP &&
6356             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6357                 return -EOPNOTSUPP;
6358
6359         if (!info->attrs[NL80211_ATTR_MAC])
6360                 return -EINVAL;
6361
6362         if (!rdev->ops->probe_client)
6363                 return -EOPNOTSUPP;
6364
6365         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6366         if (!msg)
6367                 return -ENOMEM;
6368
6369         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6370                              NL80211_CMD_PROBE_CLIENT);
6371
6372         if (IS_ERR(hdr)) {
6373                 err = PTR_ERR(hdr);
6374                 goto free_msg;
6375         }
6376
6377         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6378
6379         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6380         if (err)
6381                 goto free_msg;
6382
6383         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6384                 goto nla_put_failure;
6385
6386         genlmsg_end(msg, hdr);
6387
6388         return genlmsg_reply(msg, info);
6389
6390  nla_put_failure:
6391         err = -ENOBUFS;
6392  free_msg:
6393         nlmsg_free(msg);
6394         return err;
6395 }
6396
6397 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6398 {
6399         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6400
6401         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6402                 return -EOPNOTSUPP;
6403
6404         if (rdev->ap_beacons_nlpid)
6405                 return -EBUSY;
6406
6407         rdev->ap_beacons_nlpid = info->snd_pid;
6408
6409         return 0;
6410 }
6411
6412 #define NL80211_FLAG_NEED_WIPHY         0x01
6413 #define NL80211_FLAG_NEED_NETDEV        0x02
6414 #define NL80211_FLAG_NEED_RTNL          0x04
6415 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6416 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6417                                          NL80211_FLAG_CHECK_NETDEV_UP)
6418
6419 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6420                             struct genl_info *info)
6421 {
6422         struct cfg80211_registered_device *rdev;
6423         struct net_device *dev;
6424         int err;
6425         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6426
6427         if (rtnl)
6428                 rtnl_lock();
6429
6430         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6431                 rdev = cfg80211_get_dev_from_info(info);
6432                 if (IS_ERR(rdev)) {
6433                         if (rtnl)
6434                                 rtnl_unlock();
6435                         return PTR_ERR(rdev);
6436                 }
6437                 info->user_ptr[0] = rdev;
6438         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6439                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6440                                               &rdev, &dev);
6441                 if (err) {
6442                         if (rtnl)
6443                                 rtnl_unlock();
6444                         return err;
6445                 }
6446                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6447                     !netif_running(dev)) {
6448                         cfg80211_unlock_rdev(rdev);
6449                         dev_put(dev);
6450                         if (rtnl)
6451                                 rtnl_unlock();
6452                         return -ENETDOWN;
6453                 }
6454                 info->user_ptr[0] = rdev;
6455                 info->user_ptr[1] = dev;
6456         }
6457
6458         return 0;
6459 }
6460
6461 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6462                               struct genl_info *info)
6463 {
6464         if (info->user_ptr[0])
6465                 cfg80211_unlock_rdev(info->user_ptr[0]);
6466         if (info->user_ptr[1])
6467                 dev_put(info->user_ptr[1]);
6468         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6469                 rtnl_unlock();
6470 }
6471
6472 static struct genl_ops nl80211_ops[] = {
6473         {
6474                 .cmd = NL80211_CMD_GET_WIPHY,
6475                 .doit = nl80211_get_wiphy,
6476                 .dumpit = nl80211_dump_wiphy,
6477                 .policy = nl80211_policy,
6478                 /* can be retrieved by unprivileged users */
6479                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6480         },
6481         {
6482                 .cmd = NL80211_CMD_SET_WIPHY,
6483                 .doit = nl80211_set_wiphy,
6484                 .policy = nl80211_policy,
6485                 .flags = GENL_ADMIN_PERM,
6486                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6487         },
6488         {
6489                 .cmd = NL80211_CMD_GET_INTERFACE,
6490                 .doit = nl80211_get_interface,
6491                 .dumpit = nl80211_dump_interface,
6492                 .policy = nl80211_policy,
6493                 /* can be retrieved by unprivileged users */
6494                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6495         },
6496         {
6497                 .cmd = NL80211_CMD_SET_INTERFACE,
6498                 .doit = nl80211_set_interface,
6499                 .policy = nl80211_policy,
6500                 .flags = GENL_ADMIN_PERM,
6501                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6502                                   NL80211_FLAG_NEED_RTNL,
6503         },
6504         {
6505                 .cmd = NL80211_CMD_NEW_INTERFACE,
6506                 .doit = nl80211_new_interface,
6507                 .policy = nl80211_policy,
6508                 .flags = GENL_ADMIN_PERM,
6509                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6510                                   NL80211_FLAG_NEED_RTNL,
6511         },
6512         {
6513                 .cmd = NL80211_CMD_DEL_INTERFACE,
6514                 .doit = nl80211_del_interface,
6515                 .policy = nl80211_policy,
6516                 .flags = GENL_ADMIN_PERM,
6517                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6518                                   NL80211_FLAG_NEED_RTNL,
6519         },
6520         {
6521                 .cmd = NL80211_CMD_GET_KEY,
6522                 .doit = nl80211_get_key,
6523                 .policy = nl80211_policy,
6524                 .flags = GENL_ADMIN_PERM,
6525                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6526                                   NL80211_FLAG_NEED_RTNL,
6527         },
6528         {
6529                 .cmd = NL80211_CMD_SET_KEY,
6530                 .doit = nl80211_set_key,
6531                 .policy = nl80211_policy,
6532                 .flags = GENL_ADMIN_PERM,
6533                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6534                                   NL80211_FLAG_NEED_RTNL,
6535         },
6536         {
6537                 .cmd = NL80211_CMD_NEW_KEY,
6538                 .doit = nl80211_new_key,
6539                 .policy = nl80211_policy,
6540                 .flags = GENL_ADMIN_PERM,
6541                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6542                                   NL80211_FLAG_NEED_RTNL,
6543         },
6544         {
6545                 .cmd = NL80211_CMD_DEL_KEY,
6546                 .doit = nl80211_del_key,
6547                 .policy = nl80211_policy,
6548                 .flags = GENL_ADMIN_PERM,
6549                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6550                                   NL80211_FLAG_NEED_RTNL,
6551         },
6552         {
6553                 .cmd = NL80211_CMD_SET_BEACON,
6554                 .policy = nl80211_policy,
6555                 .flags = GENL_ADMIN_PERM,
6556                 .doit = nl80211_set_beacon,
6557                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6558                                   NL80211_FLAG_NEED_RTNL,
6559         },
6560         {
6561                 .cmd = NL80211_CMD_START_AP,
6562                 .policy = nl80211_policy,
6563                 .flags = GENL_ADMIN_PERM,
6564                 .doit = nl80211_start_ap,
6565                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6566                                   NL80211_FLAG_NEED_RTNL,
6567         },
6568         {
6569                 .cmd = NL80211_CMD_STOP_AP,
6570                 .policy = nl80211_policy,
6571                 .flags = GENL_ADMIN_PERM,
6572                 .doit = nl80211_stop_ap,
6573                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6574                                   NL80211_FLAG_NEED_RTNL,
6575         },
6576         {
6577                 .cmd = NL80211_CMD_GET_STATION,
6578                 .doit = nl80211_get_station,
6579                 .dumpit = nl80211_dump_station,
6580                 .policy = nl80211_policy,
6581                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6582                                   NL80211_FLAG_NEED_RTNL,
6583         },
6584         {
6585                 .cmd = NL80211_CMD_SET_STATION,
6586                 .doit = nl80211_set_station,
6587                 .policy = nl80211_policy,
6588                 .flags = GENL_ADMIN_PERM,
6589                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6590                                   NL80211_FLAG_NEED_RTNL,
6591         },
6592         {
6593                 .cmd = NL80211_CMD_NEW_STATION,
6594                 .doit = nl80211_new_station,
6595                 .policy = nl80211_policy,
6596                 .flags = GENL_ADMIN_PERM,
6597                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6598                                   NL80211_FLAG_NEED_RTNL,
6599         },
6600         {
6601                 .cmd = NL80211_CMD_DEL_STATION,
6602                 .doit = nl80211_del_station,
6603                 .policy = nl80211_policy,
6604                 .flags = GENL_ADMIN_PERM,
6605                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6606                                   NL80211_FLAG_NEED_RTNL,
6607         },
6608         {
6609                 .cmd = NL80211_CMD_GET_MPATH,
6610                 .doit = nl80211_get_mpath,
6611                 .dumpit = nl80211_dump_mpath,
6612                 .policy = nl80211_policy,
6613                 .flags = GENL_ADMIN_PERM,
6614                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6615                                   NL80211_FLAG_NEED_RTNL,
6616         },
6617         {
6618                 .cmd = NL80211_CMD_SET_MPATH,
6619                 .doit = nl80211_set_mpath,
6620                 .policy = nl80211_policy,
6621                 .flags = GENL_ADMIN_PERM,
6622                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6623                                   NL80211_FLAG_NEED_RTNL,
6624         },
6625         {
6626                 .cmd = NL80211_CMD_NEW_MPATH,
6627                 .doit = nl80211_new_mpath,
6628                 .policy = nl80211_policy,
6629                 .flags = GENL_ADMIN_PERM,
6630                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6631                                   NL80211_FLAG_NEED_RTNL,
6632         },
6633         {
6634                 .cmd = NL80211_CMD_DEL_MPATH,
6635                 .doit = nl80211_del_mpath,
6636                 .policy = nl80211_policy,
6637                 .flags = GENL_ADMIN_PERM,
6638                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6639                                   NL80211_FLAG_NEED_RTNL,
6640         },
6641         {
6642                 .cmd = NL80211_CMD_SET_BSS,
6643                 .doit = nl80211_set_bss,
6644                 .policy = nl80211_policy,
6645                 .flags = GENL_ADMIN_PERM,
6646                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6647                                   NL80211_FLAG_NEED_RTNL,
6648         },
6649         {
6650                 .cmd = NL80211_CMD_GET_REG,
6651                 .doit = nl80211_get_reg,
6652                 .policy = nl80211_policy,
6653                 /* can be retrieved by unprivileged users */
6654         },
6655         {
6656                 .cmd = NL80211_CMD_SET_REG,
6657                 .doit = nl80211_set_reg,
6658                 .policy = nl80211_policy,
6659                 .flags = GENL_ADMIN_PERM,
6660         },
6661         {
6662                 .cmd = NL80211_CMD_REQ_SET_REG,
6663                 .doit = nl80211_req_set_reg,
6664                 .policy = nl80211_policy,
6665                 .flags = GENL_ADMIN_PERM,
6666         },
6667         {
6668                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6669                 .doit = nl80211_get_mesh_config,
6670                 .policy = nl80211_policy,
6671                 /* can be retrieved by unprivileged users */
6672                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6673                                   NL80211_FLAG_NEED_RTNL,
6674         },
6675         {
6676                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6677                 .doit = nl80211_update_mesh_config,
6678                 .policy = nl80211_policy,
6679                 .flags = GENL_ADMIN_PERM,
6680                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6681                                   NL80211_FLAG_NEED_RTNL,
6682         },
6683         {
6684                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6685                 .doit = nl80211_trigger_scan,
6686                 .policy = nl80211_policy,
6687                 .flags = GENL_ADMIN_PERM,
6688                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6689                                   NL80211_FLAG_NEED_RTNL,
6690         },
6691         {
6692                 .cmd = NL80211_CMD_GET_SCAN,
6693                 .policy = nl80211_policy,
6694                 .dumpit = nl80211_dump_scan,
6695         },
6696         {
6697                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6698                 .doit = nl80211_start_sched_scan,
6699                 .policy = nl80211_policy,
6700                 .flags = GENL_ADMIN_PERM,
6701                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6702                                   NL80211_FLAG_NEED_RTNL,
6703         },
6704         {
6705                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6706                 .doit = nl80211_stop_sched_scan,
6707                 .policy = nl80211_policy,
6708                 .flags = GENL_ADMIN_PERM,
6709                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6710                                   NL80211_FLAG_NEED_RTNL,
6711         },
6712         {
6713                 .cmd = NL80211_CMD_AUTHENTICATE,
6714                 .doit = nl80211_authenticate,
6715                 .policy = nl80211_policy,
6716                 .flags = GENL_ADMIN_PERM,
6717                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6718                                   NL80211_FLAG_NEED_RTNL,
6719         },
6720         {
6721                 .cmd = NL80211_CMD_ASSOCIATE,
6722                 .doit = nl80211_associate,
6723                 .policy = nl80211_policy,
6724                 .flags = GENL_ADMIN_PERM,
6725                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6726                                   NL80211_FLAG_NEED_RTNL,
6727         },
6728         {
6729                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6730                 .doit = nl80211_deauthenticate,
6731                 .policy = nl80211_policy,
6732                 .flags = GENL_ADMIN_PERM,
6733                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6734                                   NL80211_FLAG_NEED_RTNL,
6735         },
6736         {
6737                 .cmd = NL80211_CMD_DISASSOCIATE,
6738                 .doit = nl80211_disassociate,
6739                 .policy = nl80211_policy,
6740                 .flags = GENL_ADMIN_PERM,
6741                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6742                                   NL80211_FLAG_NEED_RTNL,
6743         },
6744         {
6745                 .cmd = NL80211_CMD_JOIN_IBSS,
6746                 .doit = nl80211_join_ibss,
6747                 .policy = nl80211_policy,
6748                 .flags = GENL_ADMIN_PERM,
6749                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6750                                   NL80211_FLAG_NEED_RTNL,
6751         },
6752         {
6753                 .cmd = NL80211_CMD_LEAVE_IBSS,
6754                 .doit = nl80211_leave_ibss,
6755                 .policy = nl80211_policy,
6756                 .flags = GENL_ADMIN_PERM,
6757                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6758                                   NL80211_FLAG_NEED_RTNL,
6759         },
6760 #ifdef CONFIG_NL80211_TESTMODE
6761         {
6762                 .cmd = NL80211_CMD_TESTMODE,
6763                 .doit = nl80211_testmode_do,
6764                 .dumpit = nl80211_testmode_dump,
6765                 .policy = nl80211_policy,
6766                 .flags = GENL_ADMIN_PERM,
6767                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6768                                   NL80211_FLAG_NEED_RTNL,
6769         },
6770 #endif
6771         {
6772                 .cmd = NL80211_CMD_CONNECT,
6773                 .doit = nl80211_connect,
6774                 .policy = nl80211_policy,
6775                 .flags = GENL_ADMIN_PERM,
6776                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6777                                   NL80211_FLAG_NEED_RTNL,
6778         },
6779         {
6780                 .cmd = NL80211_CMD_DISCONNECT,
6781                 .doit = nl80211_disconnect,
6782                 .policy = nl80211_policy,
6783                 .flags = GENL_ADMIN_PERM,
6784                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6785                                   NL80211_FLAG_NEED_RTNL,
6786         },
6787         {
6788                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6789                 .doit = nl80211_wiphy_netns,
6790                 .policy = nl80211_policy,
6791                 .flags = GENL_ADMIN_PERM,
6792                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6793                                   NL80211_FLAG_NEED_RTNL,
6794         },
6795         {
6796                 .cmd = NL80211_CMD_GET_SURVEY,
6797                 .policy = nl80211_policy,
6798                 .dumpit = nl80211_dump_survey,
6799         },
6800         {
6801                 .cmd = NL80211_CMD_SET_PMKSA,
6802                 .doit = nl80211_setdel_pmksa,
6803                 .policy = nl80211_policy,
6804                 .flags = GENL_ADMIN_PERM,
6805                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6806                                   NL80211_FLAG_NEED_RTNL,
6807         },
6808         {
6809                 .cmd = NL80211_CMD_DEL_PMKSA,
6810                 .doit = nl80211_setdel_pmksa,
6811                 .policy = nl80211_policy,
6812                 .flags = GENL_ADMIN_PERM,
6813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6814                                   NL80211_FLAG_NEED_RTNL,
6815         },
6816         {
6817                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6818                 .doit = nl80211_flush_pmksa,
6819                 .policy = nl80211_policy,
6820                 .flags = GENL_ADMIN_PERM,
6821                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6822                                   NL80211_FLAG_NEED_RTNL,
6823         },
6824         {
6825                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6826                 .doit = nl80211_remain_on_channel,
6827                 .policy = nl80211_policy,
6828                 .flags = GENL_ADMIN_PERM,
6829                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6830                                   NL80211_FLAG_NEED_RTNL,
6831         },
6832         {
6833                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6834                 .doit = nl80211_cancel_remain_on_channel,
6835                 .policy = nl80211_policy,
6836                 .flags = GENL_ADMIN_PERM,
6837                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6838                                   NL80211_FLAG_NEED_RTNL,
6839         },
6840         {
6841                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6842                 .doit = nl80211_set_tx_bitrate_mask,
6843                 .policy = nl80211_policy,
6844                 .flags = GENL_ADMIN_PERM,
6845                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6846                                   NL80211_FLAG_NEED_RTNL,
6847         },
6848         {
6849                 .cmd = NL80211_CMD_REGISTER_FRAME,
6850                 .doit = nl80211_register_mgmt,
6851                 .policy = nl80211_policy,
6852                 .flags = GENL_ADMIN_PERM,
6853                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6854                                   NL80211_FLAG_NEED_RTNL,
6855         },
6856         {
6857                 .cmd = NL80211_CMD_FRAME,
6858                 .doit = nl80211_tx_mgmt,
6859                 .policy = nl80211_policy,
6860                 .flags = GENL_ADMIN_PERM,
6861                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6862                                   NL80211_FLAG_NEED_RTNL,
6863         },
6864         {
6865                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6866                 .doit = nl80211_tx_mgmt_cancel_wait,
6867                 .policy = nl80211_policy,
6868                 .flags = GENL_ADMIN_PERM,
6869                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6870                                   NL80211_FLAG_NEED_RTNL,
6871         },
6872         {
6873                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6874                 .doit = nl80211_set_power_save,
6875                 .policy = nl80211_policy,
6876                 .flags = GENL_ADMIN_PERM,
6877                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6878                                   NL80211_FLAG_NEED_RTNL,
6879         },
6880         {
6881                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6882                 .doit = nl80211_get_power_save,
6883                 .policy = nl80211_policy,
6884                 /* can be retrieved by unprivileged users */
6885                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6886                                   NL80211_FLAG_NEED_RTNL,
6887         },
6888         {
6889                 .cmd = NL80211_CMD_SET_CQM,
6890                 .doit = nl80211_set_cqm,
6891                 .policy = nl80211_policy,
6892                 .flags = GENL_ADMIN_PERM,
6893                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6894                                   NL80211_FLAG_NEED_RTNL,
6895         },
6896         {
6897                 .cmd = NL80211_CMD_SET_CHANNEL,
6898                 .doit = nl80211_set_channel,
6899                 .policy = nl80211_policy,
6900                 .flags = GENL_ADMIN_PERM,
6901                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6902                                   NL80211_FLAG_NEED_RTNL,
6903         },
6904         {
6905                 .cmd = NL80211_CMD_SET_WDS_PEER,
6906                 .doit = nl80211_set_wds_peer,
6907                 .policy = nl80211_policy,
6908                 .flags = GENL_ADMIN_PERM,
6909                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6910                                   NL80211_FLAG_NEED_RTNL,
6911         },
6912         {
6913                 .cmd = NL80211_CMD_JOIN_MESH,
6914                 .doit = nl80211_join_mesh,
6915                 .policy = nl80211_policy,
6916                 .flags = GENL_ADMIN_PERM,
6917                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6918                                   NL80211_FLAG_NEED_RTNL,
6919         },
6920         {
6921                 .cmd = NL80211_CMD_LEAVE_MESH,
6922                 .doit = nl80211_leave_mesh,
6923                 .policy = nl80211_policy,
6924                 .flags = GENL_ADMIN_PERM,
6925                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6926                                   NL80211_FLAG_NEED_RTNL,
6927         },
6928         {
6929                 .cmd = NL80211_CMD_GET_WOWLAN,
6930                 .doit = nl80211_get_wowlan,
6931                 .policy = nl80211_policy,
6932                 /* can be retrieved by unprivileged users */
6933                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6934                                   NL80211_FLAG_NEED_RTNL,
6935         },
6936         {
6937                 .cmd = NL80211_CMD_SET_WOWLAN,
6938                 .doit = nl80211_set_wowlan,
6939                 .policy = nl80211_policy,
6940                 .flags = GENL_ADMIN_PERM,
6941                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6942                                   NL80211_FLAG_NEED_RTNL,
6943         },
6944         {
6945                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6946                 .doit = nl80211_set_rekey_data,
6947                 .policy = nl80211_policy,
6948                 .flags = GENL_ADMIN_PERM,
6949                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6950                                   NL80211_FLAG_NEED_RTNL,
6951         },
6952         {
6953                 .cmd = NL80211_CMD_TDLS_MGMT,
6954                 .doit = nl80211_tdls_mgmt,
6955                 .policy = nl80211_policy,
6956                 .flags = GENL_ADMIN_PERM,
6957                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6958                                   NL80211_FLAG_NEED_RTNL,
6959         },
6960         {
6961                 .cmd = NL80211_CMD_TDLS_OPER,
6962                 .doit = nl80211_tdls_oper,
6963                 .policy = nl80211_policy,
6964                 .flags = GENL_ADMIN_PERM,
6965                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6966                                   NL80211_FLAG_NEED_RTNL,
6967         },
6968         {
6969                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6970                 .doit = nl80211_register_unexpected_frame,
6971                 .policy = nl80211_policy,
6972                 .flags = GENL_ADMIN_PERM,
6973                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6974                                   NL80211_FLAG_NEED_RTNL,
6975         },
6976         {
6977                 .cmd = NL80211_CMD_PROBE_CLIENT,
6978                 .doit = nl80211_probe_client,
6979                 .policy = nl80211_policy,
6980                 .flags = GENL_ADMIN_PERM,
6981                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6982                                   NL80211_FLAG_NEED_RTNL,
6983         },
6984         {
6985                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6986                 .doit = nl80211_register_beacons,
6987                 .policy = nl80211_policy,
6988                 .flags = GENL_ADMIN_PERM,
6989                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6990                                   NL80211_FLAG_NEED_RTNL,
6991         },
6992         {
6993                 .cmd = NL80211_CMD_SET_NOACK_MAP,
6994                 .doit = nl80211_set_noack_map,
6995                 .policy = nl80211_policy,
6996                 .flags = GENL_ADMIN_PERM,
6997                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6998                                   NL80211_FLAG_NEED_RTNL,
6999         },
7000
7001 };
7002
7003 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7004         .name = "mlme",
7005 };
7006
7007 /* multicast groups */
7008 static struct genl_multicast_group nl80211_config_mcgrp = {
7009         .name = "config",
7010 };
7011 static struct genl_multicast_group nl80211_scan_mcgrp = {
7012         .name = "scan",
7013 };
7014 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7015         .name = "regulatory",
7016 };
7017
7018 /* notification functions */
7019
7020 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7021 {
7022         struct sk_buff *msg;
7023
7024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7025         if (!msg)
7026                 return;
7027
7028         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7029                 nlmsg_free(msg);
7030                 return;
7031         }
7032
7033         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7034                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7035 }
7036
7037 static int nl80211_add_scan_req(struct sk_buff *msg,
7038                                 struct cfg80211_registered_device *rdev)
7039 {
7040         struct cfg80211_scan_request *req = rdev->scan_req;
7041         struct nlattr *nest;
7042         int i;
7043
7044         ASSERT_RDEV_LOCK(rdev);
7045
7046         if (WARN_ON(!req))
7047                 return 0;
7048
7049         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7050         if (!nest)
7051                 goto nla_put_failure;
7052         for (i = 0; i < req->n_ssids; i++) {
7053                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7054                         goto nla_put_failure;
7055         }
7056         nla_nest_end(msg, nest);
7057
7058         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7059         if (!nest)
7060                 goto nla_put_failure;
7061         for (i = 0; i < req->n_channels; i++) {
7062                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7063                         goto nla_put_failure;
7064         }
7065         nla_nest_end(msg, nest);
7066
7067         if (req->ie &&
7068             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7069                 goto nla_put_failure;
7070
7071         return 0;
7072  nla_put_failure:
7073         return -ENOBUFS;
7074 }
7075
7076 static int nl80211_send_scan_msg(struct sk_buff *msg,
7077                                  struct cfg80211_registered_device *rdev,
7078                                  struct net_device *netdev,
7079                                  u32 pid, u32 seq, int flags,
7080                                  u32 cmd)
7081 {
7082         void *hdr;
7083
7084         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7085         if (!hdr)
7086                 return -1;
7087
7088         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7089             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7090                 goto nla_put_failure;
7091
7092         /* ignore errors and send incomplete event anyway */
7093         nl80211_add_scan_req(msg, rdev);
7094
7095         return genlmsg_end(msg, hdr);
7096
7097  nla_put_failure:
7098         genlmsg_cancel(msg, hdr);
7099         return -EMSGSIZE;
7100 }
7101
7102 static int
7103 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7104                             struct cfg80211_registered_device *rdev,
7105                             struct net_device *netdev,
7106                             u32 pid, u32 seq, int flags, u32 cmd)
7107 {
7108         void *hdr;
7109
7110         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7111         if (!hdr)
7112                 return -1;
7113
7114         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7115             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7116                 goto nla_put_failure;
7117
7118         return genlmsg_end(msg, hdr);
7119
7120  nla_put_failure:
7121         genlmsg_cancel(msg, hdr);
7122         return -EMSGSIZE;
7123 }
7124
7125 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7126                              struct net_device *netdev)
7127 {
7128         struct sk_buff *msg;
7129
7130         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7131         if (!msg)
7132                 return;
7133
7134         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7135                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7136                 nlmsg_free(msg);
7137                 return;
7138         }
7139
7140         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7141                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7142 }
7143
7144 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7145                             struct net_device *netdev)
7146 {
7147         struct sk_buff *msg;
7148
7149         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7150         if (!msg)
7151                 return;
7152
7153         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7154                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7155                 nlmsg_free(msg);
7156                 return;
7157         }
7158
7159         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7160                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7161 }
7162
7163 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7164                                struct net_device *netdev)
7165 {
7166         struct sk_buff *msg;
7167
7168         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7169         if (!msg)
7170                 return;
7171
7172         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7173                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7174                 nlmsg_free(msg);
7175                 return;
7176         }
7177
7178         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7179                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7180 }
7181
7182 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7183                                      struct net_device *netdev)
7184 {
7185         struct sk_buff *msg;
7186
7187         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7188         if (!msg)
7189                 return;
7190
7191         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7192                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7193                 nlmsg_free(msg);
7194                 return;
7195         }
7196
7197         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7198                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7199 }
7200
7201 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7202                              struct net_device *netdev, u32 cmd)
7203 {
7204         struct sk_buff *msg;
7205
7206         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7207         if (!msg)
7208                 return;
7209
7210         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7211                 nlmsg_free(msg);
7212                 return;
7213         }
7214
7215         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7216                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7217 }
7218
7219 /*
7220  * This can happen on global regulatory changes or device specific settings
7221  * based on custom world regulatory domains.
7222  */
7223 void nl80211_send_reg_change_event(struct regulatory_request *request)
7224 {
7225         struct sk_buff *msg;
7226         void *hdr;
7227
7228         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7229         if (!msg)
7230                 return;
7231
7232         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7233         if (!hdr) {
7234                 nlmsg_free(msg);
7235                 return;
7236         }
7237
7238         /* Userspace can always count this one always being set */
7239         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7240                 goto nla_put_failure;
7241
7242         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7243                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7244                                NL80211_REGDOM_TYPE_WORLD))
7245                         goto nla_put_failure;
7246         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7247                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7248                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7249                         goto nla_put_failure;
7250         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7251                    request->intersect) {
7252                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7253                                NL80211_REGDOM_TYPE_INTERSECTION))
7254                         goto nla_put_failure;
7255         } else {
7256                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7257                                NL80211_REGDOM_TYPE_COUNTRY) ||
7258                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7259                                    request->alpha2))
7260                         goto nla_put_failure;
7261         }
7262
7263         if (wiphy_idx_valid(request->wiphy_idx) &&
7264             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7265                 goto nla_put_failure;
7266
7267         genlmsg_end(msg, hdr);
7268
7269         rcu_read_lock();
7270         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7271                                 GFP_ATOMIC);
7272         rcu_read_unlock();
7273
7274         return;
7275
7276 nla_put_failure:
7277         genlmsg_cancel(msg, hdr);
7278         nlmsg_free(msg);
7279 }
7280
7281 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7282                                     struct net_device *netdev,
7283                                     const u8 *buf, size_t len,
7284                                     enum nl80211_commands cmd, gfp_t gfp)
7285 {
7286         struct sk_buff *msg;
7287         void *hdr;
7288
7289         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7290         if (!msg)
7291                 return;
7292
7293         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7294         if (!hdr) {
7295                 nlmsg_free(msg);
7296                 return;
7297         }
7298
7299         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7300             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7301             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7302                 goto nla_put_failure;
7303
7304         genlmsg_end(msg, hdr);
7305
7306         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7307                                 nl80211_mlme_mcgrp.id, gfp);
7308         return;
7309
7310  nla_put_failure:
7311         genlmsg_cancel(msg, hdr);
7312         nlmsg_free(msg);
7313 }
7314
7315 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7316                           struct net_device *netdev, const u8 *buf,
7317                           size_t len, gfp_t gfp)
7318 {
7319         nl80211_send_mlme_event(rdev, netdev, buf, len,
7320                                 NL80211_CMD_AUTHENTICATE, gfp);
7321 }
7322
7323 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7324                            struct net_device *netdev, const u8 *buf,
7325                            size_t len, gfp_t gfp)
7326 {
7327         nl80211_send_mlme_event(rdev, netdev, buf, len,
7328                                 NL80211_CMD_ASSOCIATE, gfp);
7329 }
7330
7331 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7332                          struct net_device *netdev, const u8 *buf,
7333                          size_t len, gfp_t gfp)
7334 {
7335         nl80211_send_mlme_event(rdev, netdev, buf, len,
7336                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7337 }
7338
7339 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7340                            struct net_device *netdev, const u8 *buf,
7341                            size_t len, gfp_t gfp)
7342 {
7343         nl80211_send_mlme_event(rdev, netdev, buf, len,
7344                                 NL80211_CMD_DISASSOCIATE, gfp);
7345 }
7346
7347 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7348                                 struct net_device *netdev, const u8 *buf,
7349                                 size_t len, gfp_t gfp)
7350 {
7351         nl80211_send_mlme_event(rdev, netdev, buf, len,
7352                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7353 }
7354
7355 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7356                                   struct net_device *netdev, const u8 *buf,
7357                                   size_t len, gfp_t gfp)
7358 {
7359         nl80211_send_mlme_event(rdev, netdev, buf, len,
7360                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7361 }
7362
7363 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7364                                       struct net_device *netdev, int cmd,
7365                                       const u8 *addr, gfp_t gfp)
7366 {
7367         struct sk_buff *msg;
7368         void *hdr;
7369
7370         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7371         if (!msg)
7372                 return;
7373
7374         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7375         if (!hdr) {
7376                 nlmsg_free(msg);
7377                 return;
7378         }
7379
7380         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7381             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7382             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7383             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7384                 goto nla_put_failure;
7385
7386         genlmsg_end(msg, hdr);
7387
7388         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7389                                 nl80211_mlme_mcgrp.id, gfp);
7390         return;
7391
7392  nla_put_failure:
7393         genlmsg_cancel(msg, hdr);
7394         nlmsg_free(msg);
7395 }
7396
7397 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7398                                struct net_device *netdev, const u8 *addr,
7399                                gfp_t gfp)
7400 {
7401         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7402                                   addr, gfp);
7403 }
7404
7405 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7406                                 struct net_device *netdev, const u8 *addr,
7407                                 gfp_t gfp)
7408 {
7409         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7410                                   addr, gfp);
7411 }
7412
7413 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7414                                  struct net_device *netdev, const u8 *bssid,
7415                                  const u8 *req_ie, size_t req_ie_len,
7416                                  const u8 *resp_ie, size_t resp_ie_len,
7417                                  u16 status, gfp_t gfp)
7418 {
7419         struct sk_buff *msg;
7420         void *hdr;
7421
7422         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7423         if (!msg)
7424                 return;
7425
7426         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7427         if (!hdr) {
7428                 nlmsg_free(msg);
7429                 return;
7430         }
7431
7432         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7433             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7434             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7435             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7436             (req_ie &&
7437              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7438             (resp_ie &&
7439              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7440                 goto nla_put_failure;
7441
7442         genlmsg_end(msg, hdr);
7443
7444         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7445                                 nl80211_mlme_mcgrp.id, gfp);
7446         return;
7447
7448  nla_put_failure:
7449         genlmsg_cancel(msg, hdr);
7450         nlmsg_free(msg);
7451
7452 }
7453
7454 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7455                          struct net_device *netdev, const u8 *bssid,
7456                          const u8 *req_ie, size_t req_ie_len,
7457                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7458 {
7459         struct sk_buff *msg;
7460         void *hdr;
7461
7462         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7463         if (!msg)
7464                 return;
7465
7466         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7467         if (!hdr) {
7468                 nlmsg_free(msg);
7469                 return;
7470         }
7471
7472         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7473             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7474             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7475             (req_ie &&
7476              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7477             (resp_ie &&
7478              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7479                 goto nla_put_failure;
7480
7481         genlmsg_end(msg, hdr);
7482
7483         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7484                                 nl80211_mlme_mcgrp.id, gfp);
7485         return;
7486
7487  nla_put_failure:
7488         genlmsg_cancel(msg, hdr);
7489         nlmsg_free(msg);
7490
7491 }
7492
7493 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7494                                struct net_device *netdev, u16 reason,
7495                                const u8 *ie, size_t ie_len, bool from_ap)
7496 {
7497         struct sk_buff *msg;
7498         void *hdr;
7499
7500         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7501         if (!msg)
7502                 return;
7503
7504         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7505         if (!hdr) {
7506                 nlmsg_free(msg);
7507                 return;
7508         }
7509
7510         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7511             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7512             (from_ap && reason &&
7513              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7514             (from_ap &&
7515              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7516             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7517                 goto nla_put_failure;
7518
7519         genlmsg_end(msg, hdr);
7520
7521         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7522                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7523         return;
7524
7525  nla_put_failure:
7526         genlmsg_cancel(msg, hdr);
7527         nlmsg_free(msg);
7528
7529 }
7530
7531 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7532                              struct net_device *netdev, const u8 *bssid,
7533                              gfp_t gfp)
7534 {
7535         struct sk_buff *msg;
7536         void *hdr;
7537
7538         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7539         if (!msg)
7540                 return;
7541
7542         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7543         if (!hdr) {
7544                 nlmsg_free(msg);
7545                 return;
7546         }
7547
7548         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7549             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7550             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7551                 goto nla_put_failure;
7552
7553         genlmsg_end(msg, hdr);
7554
7555         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7556                                 nl80211_mlme_mcgrp.id, gfp);
7557         return;
7558
7559  nla_put_failure:
7560         genlmsg_cancel(msg, hdr);
7561         nlmsg_free(msg);
7562 }
7563
7564 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7565                 struct net_device *netdev,
7566                 const u8 *macaddr, const u8* ie, u8 ie_len,
7567                 gfp_t gfp)
7568 {
7569         struct sk_buff *msg;
7570         void *hdr;
7571
7572         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7573         if (!msg)
7574                 return;
7575
7576         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7577         if (!hdr) {
7578                 nlmsg_free(msg);
7579                 return;
7580         }
7581
7582         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7583             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7584             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7585             (ie_len && ie &&
7586              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7587                 goto nla_put_failure;
7588
7589         genlmsg_end(msg, hdr);
7590
7591         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7592                                 nl80211_mlme_mcgrp.id, gfp);
7593         return;
7594
7595  nla_put_failure:
7596         genlmsg_cancel(msg, hdr);
7597         nlmsg_free(msg);
7598 }
7599
7600 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7601                                  struct net_device *netdev, const u8 *addr,
7602                                  enum nl80211_key_type key_type, int key_id,
7603                                  const u8 *tsc, gfp_t gfp)
7604 {
7605         struct sk_buff *msg;
7606         void *hdr;
7607
7608         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7609         if (!msg)
7610                 return;
7611
7612         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7613         if (!hdr) {
7614                 nlmsg_free(msg);
7615                 return;
7616         }
7617
7618         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7619             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7620             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7621             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7622             (key_id != -1 &&
7623              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7624             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7625                 goto nla_put_failure;
7626
7627         genlmsg_end(msg, hdr);
7628
7629         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7630                                 nl80211_mlme_mcgrp.id, gfp);
7631         return;
7632
7633  nla_put_failure:
7634         genlmsg_cancel(msg, hdr);
7635         nlmsg_free(msg);
7636 }
7637
7638 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7639                                     struct ieee80211_channel *channel_before,
7640                                     struct ieee80211_channel *channel_after)
7641 {
7642         struct sk_buff *msg;
7643         void *hdr;
7644         struct nlattr *nl_freq;
7645
7646         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7647         if (!msg)
7648                 return;
7649
7650         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7651         if (!hdr) {
7652                 nlmsg_free(msg);
7653                 return;
7654         }
7655
7656         /*
7657          * Since we are applying the beacon hint to a wiphy we know its
7658          * wiphy_idx is valid
7659          */
7660         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7661                 goto nla_put_failure;
7662
7663         /* Before */
7664         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7665         if (!nl_freq)
7666                 goto nla_put_failure;
7667         if (nl80211_msg_put_channel(msg, channel_before))
7668                 goto nla_put_failure;
7669         nla_nest_end(msg, nl_freq);
7670
7671         /* After */
7672         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7673         if (!nl_freq)
7674                 goto nla_put_failure;
7675         if (nl80211_msg_put_channel(msg, channel_after))
7676                 goto nla_put_failure;
7677         nla_nest_end(msg, nl_freq);
7678
7679         genlmsg_end(msg, hdr);
7680
7681         rcu_read_lock();
7682         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7683                                 GFP_ATOMIC);
7684         rcu_read_unlock();
7685
7686         return;
7687
7688 nla_put_failure:
7689         genlmsg_cancel(msg, hdr);
7690         nlmsg_free(msg);
7691 }
7692
7693 static void nl80211_send_remain_on_chan_event(
7694         int cmd, struct cfg80211_registered_device *rdev,
7695         struct net_device *netdev, u64 cookie,
7696         struct ieee80211_channel *chan,
7697         enum nl80211_channel_type channel_type,
7698         unsigned int duration, gfp_t gfp)
7699 {
7700         struct sk_buff *msg;
7701         void *hdr;
7702
7703         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7704         if (!msg)
7705                 return;
7706
7707         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7708         if (!hdr) {
7709                 nlmsg_free(msg);
7710                 return;
7711         }
7712
7713         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7714             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7715             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7716             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7717             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7718                 goto nla_put_failure;
7719
7720         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7721             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7722                 goto nla_put_failure;
7723
7724         genlmsg_end(msg, hdr);
7725
7726         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7727                                 nl80211_mlme_mcgrp.id, gfp);
7728         return;
7729
7730  nla_put_failure:
7731         genlmsg_cancel(msg, hdr);
7732         nlmsg_free(msg);
7733 }
7734
7735 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7736                                     struct net_device *netdev, u64 cookie,
7737                                     struct ieee80211_channel *chan,
7738                                     enum nl80211_channel_type channel_type,
7739                                     unsigned int duration, gfp_t gfp)
7740 {
7741         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7742                                           rdev, netdev, cookie, chan,
7743                                           channel_type, duration, gfp);
7744 }
7745
7746 void nl80211_send_remain_on_channel_cancel(
7747         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7748         u64 cookie, struct ieee80211_channel *chan,
7749         enum nl80211_channel_type channel_type, gfp_t gfp)
7750 {
7751         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7752                                           rdev, netdev, cookie, chan,
7753                                           channel_type, 0, gfp);
7754 }
7755
7756 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7757                             struct net_device *dev, const u8 *mac_addr,
7758                             struct station_info *sinfo, gfp_t gfp)
7759 {
7760         struct sk_buff *msg;
7761
7762         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7763         if (!msg)
7764                 return;
7765
7766         if (nl80211_send_station(msg, 0, 0, 0,
7767                                  rdev, dev, mac_addr, sinfo) < 0) {
7768                 nlmsg_free(msg);
7769                 return;
7770         }
7771
7772         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7773                                 nl80211_mlme_mcgrp.id, gfp);
7774 }
7775
7776 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7777                                 struct net_device *dev, const u8 *mac_addr,
7778                                 gfp_t gfp)
7779 {
7780         struct sk_buff *msg;
7781         void *hdr;
7782
7783         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7784         if (!msg)
7785                 return;
7786
7787         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7788         if (!hdr) {
7789                 nlmsg_free(msg);
7790                 return;
7791         }
7792
7793         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7794             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
7795                 goto nla_put_failure;
7796
7797         genlmsg_end(msg, hdr);
7798
7799         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7800                                 nl80211_mlme_mcgrp.id, gfp);
7801         return;
7802
7803  nla_put_failure:
7804         genlmsg_cancel(msg, hdr);
7805         nlmsg_free(msg);
7806 }
7807
7808 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7809                                        const u8 *addr, gfp_t gfp)
7810 {
7811         struct wireless_dev *wdev = dev->ieee80211_ptr;
7812         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7813         struct sk_buff *msg;
7814         void *hdr;
7815         int err;
7816         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7817
7818         if (!nlpid)
7819                 return false;
7820
7821         msg = nlmsg_new(100, gfp);
7822         if (!msg)
7823                 return true;
7824
7825         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7826         if (!hdr) {
7827                 nlmsg_free(msg);
7828                 return true;
7829         }
7830
7831         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7832             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7833             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7834                 goto nla_put_failure;
7835
7836         err = genlmsg_end(msg, hdr);
7837         if (err < 0) {
7838                 nlmsg_free(msg);
7839                 return true;
7840         }
7841
7842         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7843         return true;
7844
7845  nla_put_failure:
7846         genlmsg_cancel(msg, hdr);
7847         nlmsg_free(msg);
7848         return true;
7849 }
7850
7851 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7852 {
7853         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7854                                           addr, gfp);
7855 }
7856
7857 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7858                                     const u8 *addr, gfp_t gfp)
7859 {
7860         return __nl80211_unexpected_frame(dev,
7861                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7862                                           addr, gfp);
7863 }
7864
7865 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7866                       struct net_device *netdev, u32 nlpid,
7867                       int freq, int sig_dbm,
7868                       const u8 *buf, size_t len, gfp_t gfp)
7869 {
7870         struct sk_buff *msg;
7871         void *hdr;
7872
7873         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7874         if (!msg)
7875                 return -ENOMEM;
7876
7877         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7878         if (!hdr) {
7879                 nlmsg_free(msg);
7880                 return -ENOMEM;
7881         }
7882
7883         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7884             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7885             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
7886             (sig_dbm &&
7887              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
7888             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7889                 goto nla_put_failure;
7890
7891         genlmsg_end(msg, hdr);
7892
7893         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7894
7895  nla_put_failure:
7896         genlmsg_cancel(msg, hdr);
7897         nlmsg_free(msg);
7898         return -ENOBUFS;
7899 }
7900
7901 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7902                                  struct net_device *netdev, u64 cookie,
7903                                  const u8 *buf, size_t len, bool ack,
7904                                  gfp_t gfp)
7905 {
7906         struct sk_buff *msg;
7907         void *hdr;
7908
7909         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7910         if (!msg)
7911                 return;
7912
7913         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7914         if (!hdr) {
7915                 nlmsg_free(msg);
7916                 return;
7917         }
7918
7919         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7920             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7921             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
7922             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
7923             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
7924                 goto nla_put_failure;
7925
7926         genlmsg_end(msg, hdr);
7927
7928         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7929         return;
7930
7931  nla_put_failure:
7932         genlmsg_cancel(msg, hdr);
7933         nlmsg_free(msg);
7934 }
7935
7936 void
7937 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7938                              struct net_device *netdev,
7939                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7940                              gfp_t gfp)
7941 {
7942         struct sk_buff *msg;
7943         struct nlattr *pinfoattr;
7944         void *hdr;
7945
7946         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7947         if (!msg)
7948                 return;
7949
7950         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7951         if (!hdr) {
7952                 nlmsg_free(msg);
7953                 return;
7954         }
7955
7956         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7957             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7958                 goto nla_put_failure;
7959
7960         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7961         if (!pinfoattr)
7962                 goto nla_put_failure;
7963
7964         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7965                         rssi_event))
7966                 goto nla_put_failure;
7967
7968         nla_nest_end(msg, pinfoattr);
7969
7970         genlmsg_end(msg, hdr);
7971
7972         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7973                                 nl80211_mlme_mcgrp.id, gfp);
7974         return;
7975
7976  nla_put_failure:
7977         genlmsg_cancel(msg, hdr);
7978         nlmsg_free(msg);
7979 }
7980
7981 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7982                               struct net_device *netdev, const u8 *bssid,
7983                               const u8 *replay_ctr, gfp_t gfp)
7984 {
7985         struct sk_buff *msg;
7986         struct nlattr *rekey_attr;
7987         void *hdr;
7988
7989         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7990         if (!msg)
7991                 return;
7992
7993         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7994         if (!hdr) {
7995                 nlmsg_free(msg);
7996                 return;
7997         }
7998
7999         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8000             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8001             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8002                 goto nla_put_failure;
8003
8004         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8005         if (!rekey_attr)
8006                 goto nla_put_failure;
8007
8008         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8009                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8010                 goto nla_put_failure;
8011
8012         nla_nest_end(msg, rekey_attr);
8013
8014         genlmsg_end(msg, hdr);
8015
8016         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8017                                 nl80211_mlme_mcgrp.id, gfp);
8018         return;
8019
8020  nla_put_failure:
8021         genlmsg_cancel(msg, hdr);
8022         nlmsg_free(msg);
8023 }
8024
8025 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8026                                     struct net_device *netdev, int index,
8027                                     const u8 *bssid, bool preauth, gfp_t gfp)
8028 {
8029         struct sk_buff *msg;
8030         struct nlattr *attr;
8031         void *hdr;
8032
8033         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8034         if (!msg)
8035                 return;
8036
8037         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8038         if (!hdr) {
8039                 nlmsg_free(msg);
8040                 return;
8041         }
8042
8043         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8044             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8045                 goto nla_put_failure;
8046
8047         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8048         if (!attr)
8049                 goto nla_put_failure;
8050
8051         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8052             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8053             (preauth &&
8054              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8055                 goto nla_put_failure;
8056
8057         nla_nest_end(msg, attr);
8058
8059         genlmsg_end(msg, hdr);
8060
8061         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8062                                 nl80211_mlme_mcgrp.id, gfp);
8063         return;
8064
8065  nla_put_failure:
8066         genlmsg_cancel(msg, hdr);
8067         nlmsg_free(msg);
8068 }
8069
8070 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8071                               struct net_device *netdev, int freq,
8072                               enum nl80211_channel_type type, gfp_t gfp)
8073 {
8074         struct sk_buff *msg;
8075         void *hdr;
8076
8077         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8078         if (!msg)
8079                 return;
8080
8081         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8082         if (!hdr) {
8083                 nlmsg_free(msg);
8084                 return;
8085         }
8086
8087         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8088             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8089             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8090                 goto nla_put_failure;
8091
8092         genlmsg_end(msg, hdr);
8093
8094         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8095                                 nl80211_mlme_mcgrp.id, gfp);
8096         return;
8097
8098  nla_put_failure:
8099         genlmsg_cancel(msg, hdr);
8100         nlmsg_free(msg);
8101 }
8102
8103 void
8104 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8105                                 struct net_device *netdev, const u8 *peer,
8106                                 u32 num_packets, gfp_t gfp)
8107 {
8108         struct sk_buff *msg;
8109         struct nlattr *pinfoattr;
8110         void *hdr;
8111
8112         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8113         if (!msg)
8114                 return;
8115
8116         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8117         if (!hdr) {
8118                 nlmsg_free(msg);
8119                 return;
8120         }
8121
8122         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8123             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8124             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8125                 goto nla_put_failure;
8126
8127         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8128         if (!pinfoattr)
8129                 goto nla_put_failure;
8130
8131         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8132                 goto nla_put_failure;
8133
8134         nla_nest_end(msg, pinfoattr);
8135
8136         genlmsg_end(msg, hdr);
8137
8138         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8139                                 nl80211_mlme_mcgrp.id, gfp);
8140         return;
8141
8142  nla_put_failure:
8143         genlmsg_cancel(msg, hdr);
8144         nlmsg_free(msg);
8145 }
8146
8147 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8148                            u64 cookie, bool acked, gfp_t gfp)
8149 {
8150         struct wireless_dev *wdev = dev->ieee80211_ptr;
8151         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8152         struct sk_buff *msg;
8153         void *hdr;
8154         int err;
8155
8156         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8157         if (!msg)
8158                 return;
8159
8160         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8161         if (!hdr) {
8162                 nlmsg_free(msg);
8163                 return;
8164         }
8165
8166         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8167             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8168             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8169             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8170             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8171                 goto nla_put_failure;
8172
8173         err = genlmsg_end(msg, hdr);
8174         if (err < 0) {
8175                 nlmsg_free(msg);
8176                 return;
8177         }
8178
8179         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8180                                 nl80211_mlme_mcgrp.id, gfp);
8181         return;
8182
8183  nla_put_failure:
8184         genlmsg_cancel(msg, hdr);
8185         nlmsg_free(msg);
8186 }
8187 EXPORT_SYMBOL(cfg80211_probe_status);
8188
8189 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8190                                  const u8 *frame, size_t len,
8191                                  int freq, int sig_dbm, gfp_t gfp)
8192 {
8193         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8194         struct sk_buff *msg;
8195         void *hdr;
8196         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8197
8198         if (!nlpid)
8199                 return;
8200
8201         msg = nlmsg_new(len + 100, gfp);
8202         if (!msg)
8203                 return;
8204
8205         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8206         if (!hdr) {
8207                 nlmsg_free(msg);
8208                 return;
8209         }
8210
8211         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8212             (freq &&
8213              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8214             (sig_dbm &&
8215              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8216             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8217                 goto nla_put_failure;
8218
8219         genlmsg_end(msg, hdr);
8220
8221         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8222         return;
8223
8224  nla_put_failure:
8225         genlmsg_cancel(msg, hdr);
8226         nlmsg_free(msg);
8227 }
8228 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8229
8230 static int nl80211_netlink_notify(struct notifier_block * nb,
8231                                   unsigned long state,
8232                                   void *_notify)
8233 {
8234         struct netlink_notify *notify = _notify;
8235         struct cfg80211_registered_device *rdev;
8236         struct wireless_dev *wdev;
8237
8238         if (state != NETLINK_URELEASE)
8239                 return NOTIFY_DONE;
8240
8241         rcu_read_lock();
8242
8243         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8244                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8245                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8246                 if (rdev->ap_beacons_nlpid == notify->pid)
8247                         rdev->ap_beacons_nlpid = 0;
8248         }
8249
8250         rcu_read_unlock();
8251
8252         return NOTIFY_DONE;
8253 }
8254
8255 static struct notifier_block nl80211_netlink_notifier = {
8256         .notifier_call = nl80211_netlink_notify,
8257 };
8258
8259 /* initialisation/exit functions */
8260
8261 int nl80211_init(void)
8262 {
8263         int err;
8264
8265         err = genl_register_family_with_ops(&nl80211_fam,
8266                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8267         if (err)
8268                 return err;
8269
8270         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8271         if (err)
8272                 goto err_out;
8273
8274         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8275         if (err)
8276                 goto err_out;
8277
8278         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8279         if (err)
8280                 goto err_out;
8281
8282         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8283         if (err)
8284                 goto err_out;
8285
8286 #ifdef CONFIG_NL80211_TESTMODE
8287         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8288         if (err)
8289                 goto err_out;
8290 #endif
8291
8292         err = netlink_register_notifier(&nl80211_netlink_notifier);
8293         if (err)
8294                 goto err_out;
8295
8296         return 0;
8297  err_out:
8298         genl_unregister_family(&nl80211_fam);
8299         return err;
8300 }
8301
8302 void nl80211_exit(void)
8303 {
8304         netlink_unregister_notifier(&nl80211_netlink_notifier);
8305         genl_unregister_family(&nl80211_fam);
8306 }