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         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
 925             dev->ops->join_mesh) {
 926                 i++;
 927                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
 928                         goto nla_put_failure;
 929         }
 930         CMD(set_wds_peer, SET_WDS_PEER);
 931         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 932                 CMD(tdls_mgmt, TDLS_MGMT);
 933                 CMD(tdls_oper, TDLS_OPER);
 934         }
 935         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 936                 CMD(sched_scan_start, START_SCHED_SCAN);
 937         CMD(probe_client, PROBE_CLIENT);
 938         CMD(set_noack_map, SET_NOACK_MAP);
 939         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 940                 i++;
 941                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
 942                         goto nla_put_failure;
 943         }
 944
 945 #ifdef CONFIG_NL80211_TESTMODE
 946         CMD(testmode_cmd, TESTMODE);
 947 #endif
 948
 949 #undef CMD
 950
 951         if (dev->ops->connect || dev->ops->auth) {
 952                 i++;
 953                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
 954                         goto nla_put_failure;
 955         }
 956
 957         if (dev->ops->disconnect || dev->ops->deauth) {
 958                 i++;
 959                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
 960                         goto nla_put_failure;
 961         }
 962
 963         nla_nest_end(msg, nl_cmds);
 964
 965         if (dev->ops->remain_on_channel &&
 966             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
 967             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 968                         dev->wiphy.max_remain_on_channel_duration))
 969                 goto nla_put_failure;
 970
 971         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
 972             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
 973                 goto nla_put_failure;
 974
 975         if (mgmt_stypes) {
 976                 u16 stypes;
 977                 struct nlattr *nl_ftypes, *nl_ifs;
 978                 enum nl80211_iftype ift;
 979
 980                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 981                 if (!nl_ifs)
 982                         goto nla_put_failure;
 983
 984                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 985                         nl_ftypes = nla_nest_start(msg, ift);
 986                         if (!nl_ftypes)
 987                                 goto nla_put_failure;
 988                         i = 0;
 989                         stypes = mgmt_stypes[ift].tx;
 990                         while (stypes) {
 991                                 if ((stypes & 1) &&
 992                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
 993                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
 994                                         goto nla_put_failure;
 995                                 stypes >>= 1;
 996                                 i++;
 997                         }
 998                         nla_nest_end(msg, nl_ftypes);
 999                 }
1000
1001                 nla_nest_end(msg, nl_ifs);
1002
1003                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1004                 if (!nl_ifs)
1005                         goto nla_put_failure;
1006
1007                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1008                         nl_ftypes = nla_nest_start(msg, ift);
1009                         if (!nl_ftypes)
1010                                 goto nla_put_failure;
1011                         i = 0;
1012                         stypes = mgmt_stypes[ift].rx;
1013                         while (stypes) {
1014                                 if ((stypes & 1) &&
1015                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1016                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1017                                         goto nla_put_failure;
1018                                 stypes >>= 1;
1019                                 i++;
1020                         }
1021                         nla_nest_end(msg, nl_ftypes);
1022                 }
1023                 nla_nest_end(msg, nl_ifs);
1024         }
1025
1026         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1027                 struct nlattr *nl_wowlan;
1028
1029                 nl_wowlan = nla_nest_start(msg,
1030                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1031                 if (!nl_wowlan)
1032                         goto nla_put_failure;
1033
1034                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1035                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1036                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1037                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1038                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1039                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1040                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1041                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1042                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1043                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1044                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1045                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1046                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1047                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1048                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1049                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1050                     goto nla_put_failure;
1051                 if (dev->wiphy.wowlan.n_patterns) {
1052                         struct nl80211_wowlan_pattern_support pat = {
1053                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1054                                 .min_pattern_len =
1055                                         dev->wiphy.wowlan.pattern_min_len,
1056                                 .max_pattern_len =
1057                                         dev->wiphy.wowlan.pattern_max_len,
1058                         };
1059                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1060                                     sizeof(pat), &pat))
1061                                 goto nla_put_failure;
1062                 }
1063
1064                 nla_nest_end(msg, nl_wowlan);
1065         }
1066
1067         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1068                                 dev->wiphy.software_iftypes))
1069                 goto nla_put_failure;
1070
1071         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1072                 goto nla_put_failure;
1073
1074         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1075             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1076                         dev->wiphy.ap_sme_capa))
1077                 goto nla_put_failure;
1078
1079         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1080                         dev->wiphy.features))
1081                 goto nla_put_failure;
1082
1083         if (dev->wiphy.ht_capa_mod_mask &&
1084             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1085                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1086                     dev->wiphy.ht_capa_mod_mask))
1087                 goto nla_put_failure;
1088
1089         return genlmsg_end(msg, hdr);
1090
1091  nla_put_failure:
1092         genlmsg_cancel(msg, hdr);
1093         return -EMSGSIZE;
1094 }
1095
1096 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1097 {
1098         int idx = 0;
1099         int start = cb->args[0];
1100         struct cfg80211_registered_device *dev;
1101
1102         mutex_lock(&cfg80211_mutex);
1103         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1104                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1105                         continue;
1106                 if (++idx <= start)
1107                         continue;
1108                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1109                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1110                                        dev) < 0) {
1111                         idx--;
1112                         break;
1113                 }
1114         }
1115         mutex_unlock(&cfg80211_mutex);
1116
1117         cb->args[0] = idx;
1118
1119         return skb->len;
1120 }
1121
1122 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1123 {
1124         struct sk_buff *msg;
1125         struct cfg80211_registered_device *dev = info->user_ptr[0];
1126
1127         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1128         if (!msg)
1129                 return -ENOMEM;
1130
1131         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1132                 nlmsg_free(msg);
1133                 return -ENOBUFS;
1134         }
1135
1136         return genlmsg_reply(msg, info);
1137 }
1138
1139 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1140         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1141         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1142         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1143         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1144         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1145 };
1146
1147 static int parse_txq_params(struct nlattr *tb[],
1148                             struct ieee80211_txq_params *txq_params)
1149 {
1150         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1151             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1152             !tb[NL80211_TXQ_ATTR_AIFS])
1153                 return -EINVAL;
1154
1155         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1156         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1157         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1158         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1159         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1160
1161         if (txq_params->ac >= NL80211_NUM_ACS)
1162                 return -EINVAL;
1163
1164         return 0;
1165 }
1166
1167 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1168 {
1169         /*
1170          * You can only set the channel explicitly for WDS interfaces,
1171          * all others have their channel managed via their respective
1172          * "establish a connection" command (connect, join, ...)
1173          *
1174          * For AP/GO and mesh mode, the channel can be set with the
1175          * channel userspace API, but is only stored and passed to the
1176          * low-level driver when the AP starts or the mesh is joined.
1177          * This is for backward compatibility, userspace can also give
1178          * the channel in the start-ap or join-mesh commands instead.
1179          *
1180          * Monitors are special as they are normally slaved to
1181          * whatever else is going on, so they have their own special
1182          * operation to set the monitor channel if possible.
1183          */
1184         return !wdev ||
1185                 wdev->iftype == NL80211_IFTYPE_AP ||
1186                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1187                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1188                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1189 }
1190
1191 static bool nl80211_valid_channel_type(struct genl_info *info,
1192                                        enum nl80211_channel_type *channel_type)
1193 {
1194         enum nl80211_channel_type tmp;
1195
1196         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1197                 return false;
1198
1199         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1200         if (tmp != NL80211_CHAN_NO_HT &&
1201             tmp != NL80211_CHAN_HT20 &&
1202             tmp != NL80211_CHAN_HT40PLUS &&
1203             tmp != NL80211_CHAN_HT40MINUS)
1204                 return false;
1205
1206         if (channel_type)
1207                 *channel_type = tmp;
1208
1209         return true;
1210 }
1211
1212 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1213                                  struct wireless_dev *wdev,
1214                                  struct genl_info *info)
1215 {
1216         struct ieee80211_channel *channel;
1217         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1218         u32 freq;
1219         int result;
1220         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1221
1222         if (wdev)
1223                 iftype = wdev->iftype;
1224
1225         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1226                 return -EINVAL;
1227
1228         if (!nl80211_can_set_dev_channel(wdev))
1229                 return -EOPNOTSUPP;
1230
1231         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1232             !nl80211_valid_channel_type(info, &channel_type))
1233                 return -EINVAL;
1234
1235         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1236
1237         mutex_lock(&rdev->devlist_mtx);
1238         switch (iftype) {
1239         case NL80211_IFTYPE_AP:
1240         case NL80211_IFTYPE_P2P_GO:
1241                 if (wdev->beacon_interval) {
1242                         result = -EBUSY;
1243                         break;
1244                 }
1245                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1246                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1247                                                               channel,
1248                                                               channel_type)) {
1249                         result = -EINVAL;
1250                         break;
1251                 }
1252                 wdev->preset_chan = channel;
1253                 wdev->preset_chantype = channel_type;
1254                 result = 0;
1255                 break;
1256         case NL80211_IFTYPE_MESH_POINT:
1257                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1258                 break;
1259         case NL80211_IFTYPE_MONITOR:
1260                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1261                 break;
1262         default:
1263                 result = -EINVAL;
1264         }
1265         mutex_unlock(&rdev->devlist_mtx);
1266
1267         return result;
1268 }
1269
1270 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1271 {
1272         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1273         struct net_device *netdev = info->user_ptr[1];
1274
1275         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1276 }
1277
1278 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1279 {
1280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1281         struct net_device *dev = info->user_ptr[1];
1282         struct wireless_dev *wdev = dev->ieee80211_ptr;
1283         const u8 *bssid;
1284
1285         if (!info->attrs[NL80211_ATTR_MAC])
1286                 return -EINVAL;
1287
1288         if (netif_running(dev))
1289                 return -EBUSY;
1290
1291         if (!rdev->ops->set_wds_peer)
1292                 return -EOPNOTSUPP;
1293
1294         if (wdev->iftype != NL80211_IFTYPE_WDS)
1295                 return -EOPNOTSUPP;
1296
1297         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1298         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1299 }
1300
1301
1302 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1303 {
1304         struct cfg80211_registered_device *rdev;
1305         struct net_device *netdev = NULL;
1306         struct wireless_dev *wdev;
1307         int result = 0, rem_txq_params = 0;
1308         struct nlattr *nl_txq_params;
1309         u32 changed;
1310         u8 retry_short = 0, retry_long = 0;
1311         u32 frag_threshold = 0, rts_threshold = 0;
1312         u8 coverage_class = 0;
1313
1314         /*
1315          * Try to find the wiphy and netdev. Normally this
1316          * function shouldn't need the netdev, but this is
1317          * done for backward compatibility -- previously
1318          * setting the channel was done per wiphy, but now
1319          * it is per netdev. Previous userland like hostapd
1320          * also passed a netdev to set_wiphy, so that it is
1321          * possible to let that go to the right netdev!
1322          */
1323         mutex_lock(&cfg80211_mutex);
1324
1325         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1326                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1327
1328                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1329                 if (netdev && netdev->ieee80211_ptr) {
1330                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1331                         mutex_lock(&rdev->mtx);
1332                 } else
1333                         netdev = NULL;
1334         }
1335
1336         if (!netdev) {
1337                 rdev = __cfg80211_rdev_from_info(info);
1338                 if (IS_ERR(rdev)) {
1339                         mutex_unlock(&cfg80211_mutex);
1340                         return PTR_ERR(rdev);
1341                 }
1342                 wdev = NULL;
1343                 netdev = NULL;
1344                 result = 0;
1345
1346                 mutex_lock(&rdev->mtx);
1347         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1348                 wdev = netdev->ieee80211_ptr;
1349         else
1350                 wdev = NULL;
1351
1352         /*
1353          * end workaround code, by now the rdev is available
1354          * and locked, and wdev may or may not be NULL.
1355          */
1356
1357         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1358                 result = cfg80211_dev_rename(
1359                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1360
1361         mutex_unlock(&cfg80211_mutex);
1362
1363         if (result)
1364                 goto bad_res;
1365
1366         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1367                 struct ieee80211_txq_params txq_params;
1368                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1369
1370                 if (!rdev->ops->set_txq_params) {
1371                         result = -EOPNOTSUPP;
1372                         goto bad_res;
1373                 }
1374
1375                 if (!netdev) {
1376                         result = -EINVAL;
1377                         goto bad_res;
1378                 }
1379
1380                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1381                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1382                         result = -EINVAL;
1383                         goto bad_res;
1384                 }
1385
1386                 if (!netif_running(netdev)) {
1387                         result = -ENETDOWN;
1388                         goto bad_res;
1389                 }
1390
1391                 nla_for_each_nested(nl_txq_params,
1392                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1393                                     rem_txq_params) {
1394                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1395                                   nla_data(nl_txq_params),
1396                                   nla_len(nl_txq_params),
1397                                   txq_params_policy);
1398                         result = parse_txq_params(tb, &txq_params);
1399                         if (result)
1400                                 goto bad_res;
1401
1402                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1403                                                            netdev,
1404                                                            &txq_params);
1405                         if (result)
1406                                 goto bad_res;
1407                 }
1408         }
1409
1410         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1411                 result = __nl80211_set_channel(rdev, wdev, info);
1412                 if (result)
1413                         goto bad_res;
1414         }
1415
1416         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1417                 enum nl80211_tx_power_setting type;
1418                 int idx, mbm = 0;
1419
1420                 if (!rdev->ops->set_tx_power) {
1421                         result = -EOPNOTSUPP;
1422                         goto bad_res;
1423                 }
1424
1425                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1426                 type = nla_get_u32(info->attrs[idx]);
1427
1428                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1429                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1430                         result = -EINVAL;
1431                         goto bad_res;
1432                 }
1433
1434                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1435                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1436                         mbm = nla_get_u32(info->attrs[idx]);
1437                 }
1438
1439                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1440                 if (result)
1441                         goto bad_res;
1442         }
1443
1444         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1445             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1446                 u32 tx_ant, rx_ant;
1447                 if ((!rdev->wiphy.available_antennas_tx &&
1448                      !rdev->wiphy.available_antennas_rx) ||
1449                     !rdev->ops->set_antenna) {
1450                         result = -EOPNOTSUPP;
1451                         goto bad_res;
1452                 }
1453
1454                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1455                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1456
1457                 /* reject antenna configurations which don't match the
1458                  * available antenna masks, except for the "all" mask */
1459                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1460                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1461                         result = -EINVAL;
1462                         goto bad_res;
1463                 }
1464
1465                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1466                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1467
1468                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1469                 if (result)
1470                         goto bad_res;
1471         }
1472
1473         changed = 0;
1474
1475         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1476                 retry_short = nla_get_u8(
1477                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1478                 if (retry_short == 0) {
1479                         result = -EINVAL;
1480                         goto bad_res;
1481                 }
1482                 changed |= WIPHY_PARAM_RETRY_SHORT;
1483         }
1484
1485         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1486                 retry_long = nla_get_u8(
1487                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1488                 if (retry_long == 0) {
1489                         result = -EINVAL;
1490                         goto bad_res;
1491                 }
1492                 changed |= WIPHY_PARAM_RETRY_LONG;
1493         }
1494
1495         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1496                 frag_threshold = nla_get_u32(
1497                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1498                 if (frag_threshold < 256) {
1499                         result = -EINVAL;
1500                         goto bad_res;
1501                 }
1502                 if (frag_threshold != (u32) -1) {
1503                         /*
1504                          * Fragments (apart from the last one) are required to
1505                          * have even length. Make the fragmentation code
1506                          * simpler by stripping LSB should someone try to use
1507                          * odd threshold value.
1508                          */
1509                         frag_threshold &= ~0x1;
1510                 }
1511                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1512         }
1513
1514         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1515                 rts_threshold = nla_get_u32(
1516                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1517                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1518         }
1519
1520         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1521                 coverage_class = nla_get_u8(
1522                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1523                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1524         }
1525
1526         if (changed) {
1527                 u8 old_retry_short, old_retry_long;
1528                 u32 old_frag_threshold, old_rts_threshold;
1529                 u8 old_coverage_class;
1530
1531                 if (!rdev->ops->set_wiphy_params) {
1532                         result = -EOPNOTSUPP;
1533                         goto bad_res;
1534                 }
1535
1536                 old_retry_short = rdev->wiphy.retry_short;
1537                 old_retry_long = rdev->wiphy.retry_long;
1538                 old_frag_threshold = rdev->wiphy.frag_threshold;
1539                 old_rts_threshold = rdev->wiphy.rts_threshold;
1540                 old_coverage_class = rdev->wiphy.coverage_class;
1541
1542                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1543                         rdev->wiphy.retry_short = retry_short;
1544                 if (changed & WIPHY_PARAM_RETRY_LONG)
1545                         rdev->wiphy.retry_long = retry_long;
1546                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1547                         rdev->wiphy.frag_threshold = frag_threshold;
1548                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1549                         rdev->wiphy.rts_threshold = rts_threshold;
1550                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1551                         rdev->wiphy.coverage_class = coverage_class;
1552
1553                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1554                 if (result) {
1555                         rdev->wiphy.retry_short = old_retry_short;
1556                         rdev->wiphy.retry_long = old_retry_long;
1557                         rdev->wiphy.frag_threshold = old_frag_threshold;
1558                         rdev->wiphy.rts_threshold = old_rts_threshold;
1559                         rdev->wiphy.coverage_class = old_coverage_class;
1560                 }
1561         }
1562
1563  bad_res:
1564         mutex_unlock(&rdev->mtx);
1565         if (netdev)
1566                 dev_put(netdev);
1567         return result;
1568 }
1569
1570
1571 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1572                               struct cfg80211_registered_device *rdev,
1573                               struct net_device *dev)
1574 {
1575         void *hdr;
1576
1577         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1578         if (!hdr)
1579                 return -1;
1580
1581         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1582             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1583             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1584             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1585                         dev->ieee80211_ptr->iftype) ||
1586             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1587                         rdev->devlist_generation ^
1588                         (cfg80211_rdev_list_generation << 2)))
1589                 goto nla_put_failure;
1590
1591         if (rdev->ops->get_channel) {
1592                 struct ieee80211_channel *chan;
1593                 enum nl80211_channel_type channel_type;
1594
1595                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1596                 if (chan &&
1597                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1598                                     chan->center_freq) ||
1599                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1600                                     channel_type)))
1601                         goto nla_put_failure;
1602         }
1603
1604         return genlmsg_end(msg, hdr);
1605
1606  nla_put_failure:
1607         genlmsg_cancel(msg, hdr);
1608         return -EMSGSIZE;
1609 }
1610
1611 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1612 {
1613         int wp_idx = 0;
1614         int if_idx = 0;
1615         int wp_start = cb->args[0];
1616         int if_start = cb->args[1];
1617         struct cfg80211_registered_device *rdev;
1618         struct wireless_dev *wdev;
1619
1620         mutex_lock(&cfg80211_mutex);
1621         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1622                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1623                         continue;
1624                 if (wp_idx < wp_start) {
1625                         wp_idx++;
1626                         continue;
1627                 }
1628                 if_idx = 0;
1629
1630                 mutex_lock(&rdev->devlist_mtx);
1631                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1632                         if (if_idx < if_start) {
1633                                 if_idx++;
1634                                 continue;
1635                         }
1636                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1637                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1638                                                rdev, wdev->netdev) < 0) {
1639                                 mutex_unlock(&rdev->devlist_mtx);
1640                                 goto out;
1641                         }
1642                         if_idx++;
1643                 }
1644                 mutex_unlock(&rdev->devlist_mtx);
1645
1646                 wp_idx++;
1647         }
1648  out:
1649         mutex_unlock(&cfg80211_mutex);
1650
1651         cb->args[0] = wp_idx;
1652         cb->args[1] = if_idx;
1653
1654         return skb->len;
1655 }
1656
1657 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1658 {
1659         struct sk_buff *msg;
1660         struct cfg80211_registered_device *dev = info->user_ptr[0];
1661         struct net_device *netdev = info->user_ptr[1];
1662
1663         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1664         if (!msg)
1665                 return -ENOMEM;
1666
1667         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1668                                dev, netdev) < 0) {
1669                 nlmsg_free(msg);
1670                 return -ENOBUFS;
1671         }
1672
1673         return genlmsg_reply(msg, info);
1674 }
1675
1676 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1677         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1678         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1679         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1680         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1681         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1682 };
1683
1684 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1685 {
1686         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1687         int flag;
1688
1689         *mntrflags = 0;
1690
1691         if (!nla)
1692                 return -EINVAL;
1693
1694         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1695                              nla, mntr_flags_policy))
1696                 return -EINVAL;
1697
1698         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1699                 if (flags[flag])
1700                         *mntrflags |= (1<<flag);
1701
1702         return 0;
1703 }
1704
1705 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1706                                struct net_device *netdev, u8 use_4addr,
1707                                enum nl80211_iftype iftype)
1708 {
1709         if (!use_4addr) {
1710                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1711                         return -EBUSY;
1712                 return 0;
1713         }
1714
1715         switch (iftype) {
1716         case NL80211_IFTYPE_AP_VLAN:
1717                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1718                         return 0;
1719                 break;
1720         case NL80211_IFTYPE_STATION:
1721                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1722                         return 0;
1723                 break;
1724         default:
1725                 break;
1726         }
1727
1728         return -EOPNOTSUPP;
1729 }
1730
1731 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1732 {
1733         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1734         struct vif_params params;
1735         int err;
1736         enum nl80211_iftype otype, ntype;
1737         struct net_device *dev = info->user_ptr[1];
1738         u32 _flags, *flags = NULL;
1739         bool change = false;
1740
1741         memset(&params, 0, sizeof(params));
1742
1743         otype = ntype = dev->ieee80211_ptr->iftype;
1744
1745         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1746                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1747                 if (otype != ntype)
1748                         change = true;
1749                 if (ntype > NL80211_IFTYPE_MAX)
1750                         return -EINVAL;
1751         }
1752
1753         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1754                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1755
1756                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1757                         return -EINVAL;
1758                 if (netif_running(dev))
1759                         return -EBUSY;
1760
1761                 wdev_lock(wdev);
1762                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1763                              IEEE80211_MAX_MESH_ID_LEN);
1764                 wdev->mesh_id_up_len =
1765                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1766                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1767                        wdev->mesh_id_up_len);
1768                 wdev_unlock(wdev);
1769         }
1770
1771         if (info->attrs[NL80211_ATTR_4ADDR]) {
1772                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1773                 change = true;
1774                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1775                 if (err)
1776                         return err;
1777         } else {
1778                 params.use_4addr = -1;
1779         }
1780
1781         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1782                 if (ntype != NL80211_IFTYPE_MONITOR)
1783                         return -EINVAL;
1784                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1785                                           &_flags);
1786                 if (err)
1787                         return err;
1788
1789                 flags = &_flags;
1790                 change = true;
1791         }
1792
1793         if (change)
1794                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1795         else
1796                 err = 0;
1797
1798         if (!err && params.use_4addr != -1)
1799                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1800
1801         return err;
1802 }
1803
1804 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1805 {
1806         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1807         struct vif_params params;
1808         struct net_device *dev;
1809         int err;
1810         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1811         u32 flags;
1812
1813         memset(&params, 0, sizeof(params));
1814
1815         if (!info->attrs[NL80211_ATTR_IFNAME])
1816                 return -EINVAL;
1817
1818         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1819                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1820                 if (type > NL80211_IFTYPE_MAX)
1821                         return -EINVAL;
1822         }
1823
1824         if (!rdev->ops->add_virtual_intf ||
1825             !(rdev->wiphy.interface_modes & (1 << type)))
1826                 return -EOPNOTSUPP;
1827
1828         if (info->attrs[NL80211_ATTR_4ADDR]) {
1829                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1830                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1831                 if (err)
1832                         return err;
1833         }
1834
1835         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1836                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1837                                   &flags);
1838         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1839                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1840                 type, err ? NULL : &flags, &params);
1841         if (IS_ERR(dev))
1842                 return PTR_ERR(dev);
1843
1844         if (type == NL80211_IFTYPE_MESH_POINT &&
1845             info->attrs[NL80211_ATTR_MESH_ID]) {
1846                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1847
1848                 wdev_lock(wdev);
1849                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1850                              IEEE80211_MAX_MESH_ID_LEN);
1851                 wdev->mesh_id_up_len =
1852                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1853                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1854                        wdev->mesh_id_up_len);
1855                 wdev_unlock(wdev);
1856         }
1857
1858         return 0;
1859 }
1860
1861 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1862 {
1863         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1864         struct net_device *dev = info->user_ptr[1];
1865
1866         if (!rdev->ops->del_virtual_intf)
1867                 return -EOPNOTSUPP;
1868
1869         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1870 }
1871
1872 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1873 {
1874         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1875         struct net_device *dev = info->user_ptr[1];
1876         u16 noack_map;
1877
1878         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1879                 return -EINVAL;
1880
1881         if (!rdev->ops->set_noack_map)
1882                 return -EOPNOTSUPP;
1883
1884         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1885
1886         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1887 }
1888
1889 struct get_key_cookie {
1890         struct sk_buff *msg;
1891         int error;
1892         int idx;
1893 };
1894
1895 static void get_key_callback(void *c, struct key_params *params)
1896 {
1897         struct nlattr *key;
1898         struct get_key_cookie *cookie = c;
1899
1900         if ((params->key &&
1901              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1902                      params->key_len, params->key)) ||
1903             (params->seq &&
1904              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
1905                      params->seq_len, params->seq)) ||
1906             (params->cipher &&
1907              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1908                          params->cipher)))
1909                 goto nla_put_failure;
1910
1911         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1912         if (!key)
1913                 goto nla_put_failure;
1914
1915         if ((params->key &&
1916              nla_put(cookie->msg, NL80211_KEY_DATA,
1917                      params->key_len, params->key)) ||
1918             (params->seq &&
1919              nla_put(cookie->msg, NL80211_KEY_SEQ,
1920                      params->seq_len, params->seq)) ||
1921             (params->cipher &&
1922              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
1923                          params->cipher)))
1924                 goto nla_put_failure;
1925
1926         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
1927                 goto nla_put_failure;
1928
1929         nla_nest_end(cookie->msg, key);
1930
1931         return;
1932  nla_put_failure:
1933         cookie->error = 1;
1934 }
1935
1936 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1937 {
1938         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1939         int err;
1940         struct net_device *dev = info->user_ptr[1];
1941         u8 key_idx = 0;
1942         const u8 *mac_addr = NULL;
1943         bool pairwise;
1944         struct get_key_cookie cookie = {
1945                 .error = 0,
1946         };
1947         void *hdr;
1948         struct sk_buff *msg;
1949
1950         if (info->attrs[NL80211_ATTR_KEY_IDX])
1951                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1952
1953         if (key_idx > 5)
1954                 return -EINVAL;
1955
1956         if (info->attrs[NL80211_ATTR_MAC])
1957                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1958
1959         pairwise = !!mac_addr;
1960         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1961                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1962                 if (kt >= NUM_NL80211_KEYTYPES)
1963                         return -EINVAL;
1964                 if (kt != NL80211_KEYTYPE_GROUP &&
1965                     kt != NL80211_KEYTYPE_PAIRWISE)
1966                         return -EINVAL;
1967                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1968         }
1969
1970         if (!rdev->ops->get_key)
1971                 return -EOPNOTSUPP;
1972
1973         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1974         if (!msg)
1975                 return -ENOMEM;
1976
1977         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1978                              NL80211_CMD_NEW_KEY);
1979         if (IS_ERR(hdr))
1980                 return PTR_ERR(hdr);
1981
1982         cookie.msg = msg;
1983         cookie.idx = key_idx;
1984
1985         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1986             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
1987                 goto nla_put_failure;
1988         if (mac_addr &&
1989             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
1990                 goto nla_put_failure;
1991
1992         if (pairwise && mac_addr &&
1993             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1994                 return -ENOENT;
1995
1996         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1997                                  mac_addr, &cookie, get_key_callback);
1998
1999         if (err)
2000                 goto free_msg;
2001
2002         if (cookie.error)
2003                 goto nla_put_failure;
2004
2005         genlmsg_end(msg, hdr);
2006         return genlmsg_reply(msg, info);
2007
2008  nla_put_failure:
2009         err = -ENOBUFS;
2010  free_msg:
2011         nlmsg_free(msg);
2012         return err;
2013 }
2014
2015 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2016 {
2017         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2018         struct key_parse key;
2019         int err;
2020         struct net_device *dev = info->user_ptr[1];
2021
2022         err = nl80211_parse_key(info, &key);
2023         if (err)
2024                 return err;
2025
2026         if (key.idx < 0)
2027                 return -EINVAL;
2028
2029         /* only support setting default key */
2030         if (!key.def && !key.defmgmt)
2031                 return -EINVAL;
2032
2033         wdev_lock(dev->ieee80211_ptr);
2034
2035         if (key.def) {
2036                 if (!rdev->ops->set_default_key) {
2037                         err = -EOPNOTSUPP;
2038                         goto out;
2039                 }
2040
2041                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2042                 if (err)
2043                         goto out;
2044
2045                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2046                                                  key.def_uni, key.def_multi);
2047
2048                 if (err)
2049                         goto out;
2050
2051 #ifdef CONFIG_CFG80211_WEXT
2052                 dev->ieee80211_ptr->wext.default_key = key.idx;
2053 #endif
2054         } else {
2055                 if (key.def_uni || !key.def_multi) {
2056                         err = -EINVAL;
2057                         goto out;
2058                 }
2059
2060                 if (!rdev->ops->set_default_mgmt_key) {
2061                         err = -EOPNOTSUPP;
2062                         goto out;
2063                 }
2064
2065                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2066                 if (err)
2067                         goto out;
2068
2069                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2070                                                       dev, key.idx);
2071                 if (err)
2072                         goto out;
2073
2074 #ifdef CONFIG_CFG80211_WEXT
2075                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2076 #endif
2077         }
2078
2079  out:
2080         wdev_unlock(dev->ieee80211_ptr);
2081
2082         return err;
2083 }
2084
2085 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2086 {
2087         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2088         int err;
2089         struct net_device *dev = info->user_ptr[1];
2090         struct key_parse key;
2091         const u8 *mac_addr = NULL;
2092
2093         err = nl80211_parse_key(info, &key);
2094         if (err)
2095                 return err;
2096
2097         if (!key.p.key)
2098                 return -EINVAL;
2099
2100         if (info->attrs[NL80211_ATTR_MAC])
2101                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2102
2103         if (key.type == -1) {
2104                 if (mac_addr)
2105                         key.type = NL80211_KEYTYPE_PAIRWISE;
2106                 else
2107                         key.type = NL80211_KEYTYPE_GROUP;
2108         }
2109
2110         /* for now */
2111         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2112             key.type != NL80211_KEYTYPE_GROUP)
2113                 return -EINVAL;
2114
2115         if (!rdev->ops->add_key)
2116                 return -EOPNOTSUPP;
2117
2118         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2119                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2120                                            mac_addr))
2121                 return -EINVAL;
2122
2123         wdev_lock(dev->ieee80211_ptr);
2124         err = nl80211_key_allowed(dev->ieee80211_ptr);
2125         if (!err)
2126                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2127                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2128                                          mac_addr, &key.p);
2129         wdev_unlock(dev->ieee80211_ptr);
2130
2131         return err;
2132 }
2133
2134 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2135 {
2136         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2137         int err;
2138         struct net_device *dev = info->user_ptr[1];
2139         u8 *mac_addr = NULL;
2140         struct key_parse key;
2141
2142         err = nl80211_parse_key(info, &key);
2143         if (err)
2144                 return err;
2145
2146         if (info->attrs[NL80211_ATTR_MAC])
2147                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2148
2149         if (key.type == -1) {
2150                 if (mac_addr)
2151                         key.type = NL80211_KEYTYPE_PAIRWISE;
2152                 else
2153                         key.type = NL80211_KEYTYPE_GROUP;
2154         }
2155
2156         /* for now */
2157         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2158             key.type != NL80211_KEYTYPE_GROUP)
2159                 return -EINVAL;
2160
2161         if (!rdev->ops->del_key)
2162                 return -EOPNOTSUPP;
2163
2164         wdev_lock(dev->ieee80211_ptr);
2165         err = nl80211_key_allowed(dev->ieee80211_ptr);
2166
2167         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2168             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2169                 err = -ENOENT;
2170
2171         if (!err)
2172                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2173                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2174                                          mac_addr);
2175
2176 #ifdef CONFIG_CFG80211_WEXT
2177         if (!err) {
2178                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2179                         dev->ieee80211_ptr->wext.default_key = -1;
2180                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2181                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2182         }
2183 #endif
2184         wdev_unlock(dev->ieee80211_ptr);
2185
2186         return err;
2187 }
2188
2189 static int nl80211_parse_beacon(struct genl_info *info,
2190                                 struct cfg80211_beacon_data *bcn)
2191 {
2192         bool haveinfo = false;
2193
2194         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2195             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2196             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2197             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2198                 return -EINVAL;
2199
2200         memset(bcn, 0, sizeof(*bcn));
2201
2202         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2203                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2204                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2205                 if (!bcn->head_len)
2206                         return -EINVAL;
2207                 haveinfo = true;
2208         }
2209
2210         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2211                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2212                 bcn->tail_len =
2213                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2214                 haveinfo = true;
2215         }
2216
2217         if (!haveinfo)
2218                 return -EINVAL;
2219
2220         if (info->attrs[NL80211_ATTR_IE]) {
2221                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2222                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2223         }
2224
2225         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2226                 bcn->proberesp_ies =
2227                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2228                 bcn->proberesp_ies_len =
2229                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2230         }
2231
2232         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2233                 bcn->assocresp_ies =
2234                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2235                 bcn->assocresp_ies_len =
2236                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2237         }
2238
2239         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2240                 bcn->probe_resp =
2241                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2242                 bcn->probe_resp_len =
2243                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2244         }
2245
2246         return 0;
2247 }
2248
2249 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2250 {
2251         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2252         struct net_device *dev = info->user_ptr[1];
2253         struct wireless_dev *wdev = dev->ieee80211_ptr;
2254         struct cfg80211_ap_settings params;
2255         int err;
2256
2257         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2258             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2259                 return -EOPNOTSUPP;
2260
2261         if (!rdev->ops->start_ap)
2262                 return -EOPNOTSUPP;
2263
2264         if (wdev->beacon_interval)
2265                 return -EALREADY;
2266
2267         memset(&params, 0, sizeof(params));
2268
2269         /* these are required for START_AP */
2270         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2271             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2272             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2273                 return -EINVAL;
2274
2275         err = nl80211_parse_beacon(info, &params.beacon);
2276         if (err)
2277                 return err;
2278
2279         params.beacon_interval =
2280                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2281         params.dtim_period =
2282                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2283
2284         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2285         if (err)
2286                 return err;
2287
2288         /*
2289          * In theory, some of these attributes should be required here
2290          * but since they were not used when the command was originally
2291          * added, keep them optional for old user space programs to let
2292          * them continue to work with drivers that do not need the
2293          * additional information -- drivers must check!
2294          */
2295         if (info->attrs[NL80211_ATTR_SSID]) {
2296                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2297                 params.ssid_len =
2298                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2299                 if (params.ssid_len == 0 ||
2300                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2301                         return -EINVAL;
2302         }
2303
2304         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2305                 params.hidden_ssid = nla_get_u32(
2306                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2307                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2308                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2309                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2310                         return -EINVAL;
2311         }
2312
2313         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2314
2315         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2316                 params.auth_type = nla_get_u32(
2317                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2318                 if (!nl80211_valid_auth_type(params.auth_type))
2319                         return -EINVAL;
2320         } else
2321                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2322
2323         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2324                                       NL80211_MAX_NR_CIPHER_SUITES);
2325         if (err)
2326                 return err;
2327
2328         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2329                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2330                         return -EOPNOTSUPP;
2331                 params.inactivity_timeout = nla_get_u16(
2332                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2333         }
2334
2335         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2336                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2337
2338                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2339                     !nl80211_valid_channel_type(info, &channel_type))
2340                         return -EINVAL;
2341
2342                 params.channel = rdev_freq_to_chan(rdev,
2343                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2344                         channel_type);
2345                 if (!params.channel)
2346                         return -EINVAL;
2347                 params.channel_type = channel_type;
2348         } else if (wdev->preset_chan) {
2349                 params.channel = wdev->preset_chan;
2350                 params.channel_type = wdev->preset_chantype;
2351         } else
2352                 return -EINVAL;
2353
2354         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2355                                           params.channel_type))
2356                 return -EINVAL;
2357
2358         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2359         if (!err)
2360                 wdev->beacon_interval = params.beacon_interval;
2361         return err;
2362 }
2363
2364 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2365 {
2366         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2367         struct net_device *dev = info->user_ptr[1];
2368         struct wireless_dev *wdev = dev->ieee80211_ptr;
2369         struct cfg80211_beacon_data params;
2370         int err;
2371
2372         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2373             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2374                 return -EOPNOTSUPP;
2375
2376         if (!rdev->ops->change_beacon)
2377                 return -EOPNOTSUPP;
2378
2379         if (!wdev->beacon_interval)
2380                 return -EINVAL;
2381
2382         err = nl80211_parse_beacon(info, &params);
2383         if (err)
2384                 return err;
2385
2386         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2387 }
2388
2389 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2390 {
2391         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2392         struct net_device *dev = info->user_ptr[1];
2393         struct wireless_dev *wdev = dev->ieee80211_ptr;
2394         int err;
2395
2396         if (!rdev->ops->stop_ap)
2397                 return -EOPNOTSUPP;
2398
2399         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2400             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2401                 return -EOPNOTSUPP;
2402
2403         if (!wdev->beacon_interval)
2404                 return -ENOENT;
2405
2406         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2407         if (!err)
2408                 wdev->beacon_interval = 0;
2409         return err;
2410 }
2411
2412 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2413         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2414         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2415         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2416         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2417         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2418         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2419 };
2420
2421 static int parse_station_flags(struct genl_info *info,
2422                                enum nl80211_iftype iftype,
2423                                struct station_parameters *params)
2424 {
2425         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2426         struct nlattr *nla;
2427         int flag;
2428
2429         /*
2430          * Try parsing the new attribute first so userspace
2431          * can specify both for older kernels.
2432          */
2433         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2434         if (nla) {
2435                 struct nl80211_sta_flag_update *sta_flags;
2436
2437                 sta_flags = nla_data(nla);
2438                 params->sta_flags_mask = sta_flags->mask;
2439                 params->sta_flags_set = sta_flags->set;
2440                 if ((params->sta_flags_mask |
2441                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2442                         return -EINVAL;
2443                 return 0;
2444         }
2445
2446         /* if present, parse the old attribute */
2447
2448         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2449         if (!nla)
2450                 return 0;
2451
2452         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2453                              nla, sta_flags_policy))
2454                 return -EINVAL;
2455
2456         /*
2457          * Only allow certain flags for interface types so that
2458          * other attributes are silently ignored. Remember that
2459          * this is backward compatibility code with old userspace
2460          * and shouldn't be hit in other cases anyway.
2461          */
2462         switch (iftype) {
2463         case NL80211_IFTYPE_AP:
2464         case NL80211_IFTYPE_AP_VLAN:
2465         case NL80211_IFTYPE_P2P_GO:
2466                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2467                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2468                                          BIT(NL80211_STA_FLAG_WME) |
2469                                          BIT(NL80211_STA_FLAG_MFP);
2470                 break;
2471         case NL80211_IFTYPE_P2P_CLIENT:
2472         case NL80211_IFTYPE_STATION:
2473                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2474                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2475                 break;
2476         case NL80211_IFTYPE_MESH_POINT:
2477                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2478                                          BIT(NL80211_STA_FLAG_MFP) |
2479                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2480         default:
2481                 return -EINVAL;
2482         }
2483
2484         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2485                 if (flags[flag]) {
2486                         params->sta_flags_set |= (1<<flag);
2487
2488                         /* no longer support new API additions in old API */
2489                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2490                                 return -EINVAL;
2491                 }
2492         }
2493
2494         return 0;
2495 }
2496
2497 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2498                                  int attr)
2499 {
2500         struct nlattr *rate;
2501         u16 bitrate;
2502
2503         rate = nla_nest_start(msg, attr);
2504         if (!rate)
2505                 goto nla_put_failure;
2506
2507         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2508         bitrate = cfg80211_calculate_bitrate(info);
2509         if ((bitrate > 0 &&
2510              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2511             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2512              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2513             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2514              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2515             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2516              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2517                 goto nla_put_failure;
2518
2519         nla_nest_end(msg, rate);
2520         return true;
2521
2522 nla_put_failure:
2523         return false;
2524 }
2525
2526 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2527                                 int flags,
2528                                 struct cfg80211_registered_device *rdev,
2529                                 struct net_device *dev,
2530                                 const u8 *mac_addr, struct station_info *sinfo)
2531 {
2532         void *hdr;
2533         struct nlattr *sinfoattr, *bss_param;
2534
2535         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2536         if (!hdr)
2537                 return -1;
2538
2539         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2540             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2541             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2542                 goto nla_put_failure;
2543
2544         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2545         if (!sinfoattr)
2546                 goto nla_put_failure;
2547         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2548             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2549                         sinfo->connected_time))
2550                 goto nla_put_failure;
2551         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2552             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2553                         sinfo->inactive_time))
2554                 goto nla_put_failure;
2555         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2556             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2557                         sinfo->rx_bytes))
2558                 goto nla_put_failure;
2559         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2560             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2561                         sinfo->tx_bytes))
2562                 goto nla_put_failure;
2563         if ((sinfo->filled & STATION_INFO_LLID) &&
2564             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2565                 goto nla_put_failure;
2566         if ((sinfo->filled & STATION_INFO_PLID) &&
2567             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2568                 goto nla_put_failure;
2569         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2570             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2571                        sinfo->plink_state))
2572                 goto nla_put_failure;
2573         switch (rdev->wiphy.signal_type) {
2574         case CFG80211_SIGNAL_TYPE_MBM:
2575                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2576                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2577                                sinfo->signal))
2578                         goto nla_put_failure;
2579                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2580                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2581                                sinfo->signal_avg))
2582                         goto nla_put_failure;
2583                 break;
2584         default:
2585                 break;
2586         }
2587         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2588                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2589                                           NL80211_STA_INFO_TX_BITRATE))
2590                         goto nla_put_failure;
2591         }
2592         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2593                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2594                                           NL80211_STA_INFO_RX_BITRATE))
2595                         goto nla_put_failure;
2596         }
2597         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2598             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2599                         sinfo->rx_packets))
2600                 goto nla_put_failure;
2601         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2602             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2603                         sinfo->tx_packets))
2604                 goto nla_put_failure;
2605         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2606             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2607                         sinfo->tx_retries))
2608                 goto nla_put_failure;
2609         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2610             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2611                         sinfo->tx_failed))
2612                 goto nla_put_failure;
2613         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2614             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2615                         sinfo->beacon_loss_count))
2616                 goto nla_put_failure;
2617         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2618                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2619                 if (!bss_param)
2620                         goto nla_put_failure;
2621
2622                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2623                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2624                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2625                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2626                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2627                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2628                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2629                                sinfo->bss_param.dtim_period) ||
2630                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2631                                 sinfo->bss_param.beacon_interval))
2632                         goto nla_put_failure;
2633
2634                 nla_nest_end(msg, bss_param);
2635         }
2636         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2637             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2638                     sizeof(struct nl80211_sta_flag_update),
2639                     &sinfo->sta_flags))
2640                 goto nla_put_failure;
2641         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2642                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2643                             sinfo->t_offset))
2644                 goto nla_put_failure;
2645         nla_nest_end(msg, sinfoattr);
2646
2647         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2648             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2649                     sinfo->assoc_req_ies))
2650                 goto nla_put_failure;
2651
2652         return genlmsg_end(msg, hdr);
2653
2654  nla_put_failure:
2655         genlmsg_cancel(msg, hdr);
2656         return -EMSGSIZE;
2657 }
2658
2659 static int nl80211_dump_station(struct sk_buff *skb,
2660                                 struct netlink_callback *cb)
2661 {
2662         struct station_info sinfo;
2663         struct cfg80211_registered_device *dev;
2664         struct net_device *netdev;
2665         u8 mac_addr[ETH_ALEN];
2666         int sta_idx = cb->args[1];
2667         int err;
2668
2669         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2670         if (err)
2671                 return err;
2672
2673         if (!dev->ops->dump_station) {
2674                 err = -EOPNOTSUPP;
2675                 goto out_err;
2676         }
2677
2678         while (1) {
2679                 memset(&sinfo, 0, sizeof(sinfo));
2680                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2681                                              mac_addr, &sinfo);
2682                 if (err == -ENOENT)
2683                         break;
2684                 if (err)
2685                         goto out_err;
2686
2687                 if (nl80211_send_station(skb,
2688                                 NETLINK_CB(cb->skb).pid,
2689                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2690                                 dev, netdev, mac_addr,
2691                                 &sinfo) < 0)
2692                         goto out;
2693
2694                 sta_idx++;
2695         }
2696
2697
2698  out:
2699         cb->args[1] = sta_idx;
2700         err = skb->len;
2701  out_err:
2702         nl80211_finish_netdev_dump(dev);
2703
2704         return err;
2705 }
2706
2707 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2708 {
2709         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2710         struct net_device *dev = info->user_ptr[1];
2711         struct station_info sinfo;
2712         struct sk_buff *msg;
2713         u8 *mac_addr = NULL;
2714         int err;
2715
2716         memset(&sinfo, 0, sizeof(sinfo));
2717
2718         if (!info->attrs[NL80211_ATTR_MAC])
2719                 return -EINVAL;
2720
2721         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2722
2723         if (!rdev->ops->get_station)
2724                 return -EOPNOTSUPP;
2725
2726         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2727         if (err)
2728                 return err;
2729
2730         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2731         if (!msg)
2732                 return -ENOMEM;
2733
2734         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2735                                  rdev, dev, mac_addr, &sinfo) < 0) {
2736                 nlmsg_free(msg);
2737                 return -ENOBUFS;
2738         }
2739
2740         return genlmsg_reply(msg, info);
2741 }
2742
2743 /*
2744  * Get vlan interface making sure it is running and on the right wiphy.
2745  */
2746 static struct net_device *get_vlan(struct genl_info *info,
2747                                    struct cfg80211_registered_device *rdev)
2748 {
2749         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2750         struct net_device *v;
2751         int ret;
2752
2753         if (!vlanattr)
2754                 return NULL;
2755
2756         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2757         if (!v)
2758                 return ERR_PTR(-ENODEV);
2759
2760         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2761                 ret = -EINVAL;
2762                 goto error;
2763         }
2764
2765         if (!netif_running(v)) {
2766                 ret = -ENETDOWN;
2767                 goto error;
2768         }
2769
2770         return v;
2771  error:
2772         dev_put(v);
2773         return ERR_PTR(ret);
2774 }
2775
2776 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2777 {
2778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2779         int err;
2780         struct net_device *dev = info->user_ptr[1];
2781         struct station_parameters params;
2782         u8 *mac_addr = NULL;
2783
2784         memset(&params, 0, sizeof(params));
2785
2786         params.listen_interval = -1;
2787         params.plink_state = -1;
2788
2789         if (info->attrs[NL80211_ATTR_STA_AID])
2790                 return -EINVAL;
2791
2792         if (!info->attrs[NL80211_ATTR_MAC])
2793                 return -EINVAL;
2794
2795         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2796
2797         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2798                 params.supported_rates =
2799                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2800                 params.supported_rates_len =
2801                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2802         }
2803
2804         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2805                 params.listen_interval =
2806                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2807
2808         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2809                 params.ht_capa =
2810                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2811
2812         if (!rdev->ops->change_station)
2813                 return -EOPNOTSUPP;
2814
2815         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2816                 return -EINVAL;
2817
2818         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2819                 params.plink_action =
2820                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2821
2822         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2823                 params.plink_state =
2824                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2825
2826         switch (dev->ieee80211_ptr->iftype) {
2827         case NL80211_IFTYPE_AP:
2828         case NL80211_IFTYPE_AP_VLAN:
2829         case NL80211_IFTYPE_P2P_GO:
2830                 /* disallow mesh-specific things */
2831                 if (params.plink_action)
2832                         return -EINVAL;
2833
2834                 /* TDLS can't be set, ... */
2835                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2836                         return -EINVAL;
2837                 /*
2838                  * ... but don't bother the driver with it. This works around
2839                  * a hostapd/wpa_supplicant issue -- it always includes the
2840                  * TLDS_PEER flag in the mask even for AP mode.
2841                  */
2842                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2843
2844                 /* accept only the listed bits */
2845                 if (params.sta_flags_mask &
2846                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2847                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2848                                   BIT(NL80211_STA_FLAG_WME) |
2849                                   BIT(NL80211_STA_FLAG_MFP)))
2850                         return -EINVAL;
2851
2852                 /* must be last in here for error handling */
2853                 params.vlan = get_vlan(info, rdev);
2854                 if (IS_ERR(params.vlan))
2855                         return PTR_ERR(params.vlan);
2856                 break;
2857         case NL80211_IFTYPE_P2P_CLIENT:
2858         case NL80211_IFTYPE_STATION:
2859                 /*
2860                  * Don't allow userspace to change the TDLS_PEER flag,
2861                  * but silently ignore attempts to change it since we
2862                  * don't have state here to verify that it doesn't try
2863                  * to change the flag.
2864                  */
2865                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2866                 /* fall through */
2867         case NL80211_IFTYPE_ADHOC:
2868                 /* disallow things sta doesn't support */
2869                 if (params.plink_action)
2870                         return -EINVAL;
2871                 if (params.ht_capa)
2872                         return -EINVAL;
2873                 if (params.listen_interval >= 0)
2874                         return -EINVAL;
2875                 /* reject any changes other than AUTHORIZED */
2876                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2877                         return -EINVAL;
2878                 break;
2879         case NL80211_IFTYPE_MESH_POINT:
2880                 /* disallow things mesh doesn't support */
2881                 if (params.vlan)
2882                         return -EINVAL;
2883                 if (params.ht_capa)
2884                         return -EINVAL;
2885                 if (params.listen_interval >= 0)
2886                         return -EINVAL;
2887                 /*
2888                  * No special handling for TDLS here -- the userspace
2889                  * mesh code doesn't have this bug.
2890                  */
2891                 if (params.sta_flags_mask &
2892                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2893                                   BIT(NL80211_STA_FLAG_MFP) |
2894                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2895                         return -EINVAL;
2896                 break;
2897         default:
2898                 return -EOPNOTSUPP;
2899         }
2900
2901         /* be aware of params.vlan when changing code here */
2902
2903         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2904
2905         if (params.vlan)
2906                 dev_put(params.vlan);
2907
2908         return err;
2909 }
2910
2911 static struct nla_policy
2912 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2913         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2914         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2915 };
2916
2917 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2918 {
2919         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2920         int err;
2921         struct net_device *dev = info->user_ptr[1];
2922         struct station_parameters params;
2923         u8 *mac_addr = NULL;
2924
2925         memset(&params, 0, sizeof(params));
2926
2927         if (!info->attrs[NL80211_ATTR_MAC])
2928                 return -EINVAL;
2929
2930         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2931                 return -EINVAL;
2932
2933         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2934                 return -EINVAL;
2935
2936         if (!info->attrs[NL80211_ATTR_STA_AID])
2937                 return -EINVAL;
2938
2939         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2940         params.supported_rates =
2941                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2942         params.supported_rates_len =
2943                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2944         params.listen_interval =
2945                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2946
2947         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2948         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2949                 return -EINVAL;
2950
2951         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2952                 params.ht_capa =
2953                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2954
2955         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2956                 params.plink_action =
2957                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2958
2959         if (!rdev->ops->add_station)
2960                 return -EOPNOTSUPP;
2961
2962         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2963                 return -EINVAL;
2964
2965         switch (dev->ieee80211_ptr->iftype) {
2966         case NL80211_IFTYPE_AP:
2967         case NL80211_IFTYPE_AP_VLAN:
2968         case NL80211_IFTYPE_P2P_GO:
2969                 /* parse WME attributes if sta is WME capable */
2970                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2971                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2972                     info->attrs[NL80211_ATTR_STA_WME]) {
2973                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2974                         struct nlattr *nla;
2975
2976                         nla = info->attrs[NL80211_ATTR_STA_WME];
2977                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2978                                                nl80211_sta_wme_policy);
2979                         if (err)
2980                                 return err;
2981
2982                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2983                                 params.uapsd_queues =
2984                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2985                         if (params.uapsd_queues &
2986                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2987                                 return -EINVAL;
2988
2989                         if (tb[NL80211_STA_WME_MAX_SP])
2990                                 params.max_sp =
2991                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2992
2993                         if (params.max_sp &
2994                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2995                                 return -EINVAL;
2996
2997                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2998                 }
2999                 /* TDLS peers cannot be added */
3000                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3001                         return -EINVAL;
3002                 /* but don't bother the driver with it */
3003                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3004
3005                 /* must be last in here for error handling */
3006                 params.vlan = get_vlan(info, rdev);
3007                 if (IS_ERR(params.vlan))
3008                         return PTR_ERR(params.vlan);
3009                 break;
3010         case NL80211_IFTYPE_MESH_POINT:
3011                 /* TDLS peers cannot be added */
3012                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3013                         return -EINVAL;
3014                 break;
3015         case NL80211_IFTYPE_STATION:
3016                 /* Only TDLS peers can be added */
3017                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3018                         return -EINVAL;
3019                 /* Can only add if TDLS ... */
3020                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3021                         return -EOPNOTSUPP;
3022                 /* ... with external setup is supported */
3023                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3024                         return -EOPNOTSUPP;
3025                 break;
3026         default:
3027                 return -EOPNOTSUPP;
3028         }
3029
3030         /* be aware of params.vlan when changing code here */
3031
3032         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3033
3034         if (params.vlan)
3035                 dev_put(params.vlan);
3036         return err;
3037 }
3038
3039 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3040 {
3041         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3042         struct net_device *dev = info->user_ptr[1];
3043         u8 *mac_addr = NULL;
3044
3045         if (info->attrs[NL80211_ATTR_MAC])
3046                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3047
3048         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3049             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3050             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3051             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3052                 return -EINVAL;
3053
3054         if (!rdev->ops->del_station)
3055                 return -EOPNOTSUPP;
3056
3057         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3058 }
3059
3060 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3061                                 int flags, struct net_device *dev,
3062                                 u8 *dst, u8 *next_hop,
3063                                 struct mpath_info *pinfo)
3064 {
3065         void *hdr;
3066         struct nlattr *pinfoattr;
3067
3068         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3069         if (!hdr)
3070                 return -1;
3071
3072         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3073             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3074             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3075             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3076                 goto nla_put_failure;
3077
3078         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3079         if (!pinfoattr)
3080                 goto nla_put_failure;
3081         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3082             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3083                         pinfo->frame_qlen))
3084                 goto nla_put_failure;
3085         if (((pinfo->filled & MPATH_INFO_SN) &&
3086              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3087             ((pinfo->filled & MPATH_INFO_METRIC) &&
3088              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3089                          pinfo->metric)) ||
3090             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3091              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3092                          pinfo->exptime)) ||
3093             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3094              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3095                         pinfo->flags)) ||
3096             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3097              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3098                          pinfo->discovery_timeout)) ||
3099             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3100              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3101                         pinfo->discovery_retries)))
3102                 goto nla_put_failure;
3103
3104         nla_nest_end(msg, pinfoattr);
3105
3106         return genlmsg_end(msg, hdr);
3107
3108  nla_put_failure:
3109         genlmsg_cancel(msg, hdr);
3110         return -EMSGSIZE;
3111 }
3112
3113 static int nl80211_dump_mpath(struct sk_buff *skb,
3114                               struct netlink_callback *cb)
3115 {
3116         struct mpath_info pinfo;
3117         struct cfg80211_registered_device *dev;
3118         struct net_device *netdev;
3119         u8 dst[ETH_ALEN];
3120         u8 next_hop[ETH_ALEN];
3121         int path_idx = cb->args[1];
3122         int err;
3123
3124         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3125         if (err)
3126                 return err;
3127
3128         if (!dev->ops->dump_mpath) {
3129                 err = -EOPNOTSUPP;
3130                 goto out_err;
3131         }
3132
3133         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3134                 err = -EOPNOTSUPP;
3135                 goto out_err;
3136         }
3137
3138         while (1) {
3139                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3140                                            dst, next_hop, &pinfo);
3141                 if (err == -ENOENT)
3142                         break;
3143                 if (err)
3144                         goto out_err;
3145
3146                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3147                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3148                                        netdev, dst, next_hop,
3149                                        &pinfo) < 0)
3150                         goto out;
3151
3152                 path_idx++;
3153         }
3154
3155
3156  out:
3157         cb->args[1] = path_idx;
3158         err = skb->len;
3159  out_err:
3160         nl80211_finish_netdev_dump(dev);
3161         return err;
3162 }
3163
3164 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3165 {
3166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3167         int err;
3168         struct net_device *dev = info->user_ptr[1];
3169         struct mpath_info pinfo;
3170         struct sk_buff *msg;
3171         u8 *dst = NULL;
3172         u8 next_hop[ETH_ALEN];
3173
3174         memset(&pinfo, 0, sizeof(pinfo));
3175
3176         if (!info->attrs[NL80211_ATTR_MAC])
3177                 return -EINVAL;
3178
3179         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3180
3181         if (!rdev->ops->get_mpath)
3182                 return -EOPNOTSUPP;
3183
3184         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3185                 return -EOPNOTSUPP;
3186
3187         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3188         if (err)
3189                 return err;
3190
3191         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3192         if (!msg)
3193                 return -ENOMEM;
3194
3195         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3196                                  dev, dst, next_hop, &pinfo) < 0) {
3197                 nlmsg_free(msg);
3198                 return -ENOBUFS;
3199         }
3200
3201         return genlmsg_reply(msg, info);
3202 }
3203
3204 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3205 {
3206         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3207         struct net_device *dev = info->user_ptr[1];
3208         u8 *dst = NULL;
3209         u8 *next_hop = NULL;
3210
3211         if (!info->attrs[NL80211_ATTR_MAC])
3212                 return -EINVAL;
3213
3214         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3215                 return -EINVAL;
3216
3217         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3218         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3219
3220         if (!rdev->ops->change_mpath)
3221                 return -EOPNOTSUPP;
3222
3223         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3224                 return -EOPNOTSUPP;
3225
3226         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3227 }
3228
3229 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3230 {
3231         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3232         struct net_device *dev = info->user_ptr[1];
3233         u8 *dst = NULL;
3234         u8 *next_hop = NULL;
3235
3236         if (!info->attrs[NL80211_ATTR_MAC])
3237                 return -EINVAL;
3238
3239         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3240                 return -EINVAL;
3241
3242         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3243         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3244
3245         if (!rdev->ops->add_mpath)
3246                 return -EOPNOTSUPP;
3247
3248         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3249                 return -EOPNOTSUPP;
3250
3251         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3252 }
3253
3254 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3255 {
3256         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3257         struct net_device *dev = info->user_ptr[1];
3258         u8 *dst = NULL;
3259
3260         if (info->attrs[NL80211_ATTR_MAC])
3261                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3262
3263         if (!rdev->ops->del_mpath)
3264                 return -EOPNOTSUPP;
3265
3266         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3267 }
3268
3269 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3270 {
3271         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3272         struct net_device *dev = info->user_ptr[1];
3273         struct bss_parameters params;
3274
3275         memset(&params, 0, sizeof(params));
3276         /* default to not changing parameters */
3277         params.use_cts_prot = -1;
3278         params.use_short_preamble = -1;
3279         params.use_short_slot_time = -1;
3280         params.ap_isolate = -1;
3281         params.ht_opmode = -1;
3282
3283         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3284                 params.use_cts_prot =
3285                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3286         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3287                 params.use_short_preamble =
3288                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3289         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3290                 params.use_short_slot_time =
3291                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3292         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3293                 params.basic_rates =
3294                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3295                 params.basic_rates_len =
3296                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3297         }
3298         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3299                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3300         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3301                 params.ht_opmode =
3302                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3303
3304         if (!rdev->ops->change_bss)
3305                 return -EOPNOTSUPP;
3306
3307         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3308             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3309                 return -EOPNOTSUPP;
3310
3311         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3312 }
3313
3314 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3315         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3316         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3317         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3318         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3319         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3320         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3321 };
3322
3323 static int parse_reg_rule(struct nlattr *tb[],
3324         struct ieee80211_reg_rule *reg_rule)
3325 {
3326         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3327         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3328
3329         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3330                 return -EINVAL;
3331         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3332                 return -EINVAL;
3333         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3334                 return -EINVAL;
3335         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3336                 return -EINVAL;
3337         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3338                 return -EINVAL;
3339
3340         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3341
3342         freq_range->start_freq_khz =
3343                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3344         freq_range->end_freq_khz =
3345                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3346         freq_range->max_bandwidth_khz =
3347                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3348
3349         power_rule->max_eirp =
3350                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3351
3352         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3353                 power_rule->max_antenna_gain =
3354                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3355
3356         return 0;
3357 }
3358
3359 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3360 {
3361         int r;
3362         char *data = NULL;
3363
3364         /*
3365          * You should only get this when cfg80211 hasn't yet initialized
3366          * completely when built-in to the kernel right between the time
3367          * window between nl80211_init() and regulatory_init(), if that is
3368          * even possible.
3369          */
3370         mutex_lock(&cfg80211_mutex);
3371         if (unlikely(!cfg80211_regdomain)) {
3372                 mutex_unlock(&cfg80211_mutex);
3373                 return -EINPROGRESS;
3374         }
3375         mutex_unlock(&cfg80211_mutex);
3376
3377         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3378                 return -EINVAL;
3379
3380         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3381
3382         r = regulatory_hint_user(data);
3383
3384         return r;
3385 }
3386
3387 static int nl80211_get_mesh_config(struct sk_buff *skb,
3388                                    struct genl_info *info)
3389 {
3390         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3391         struct net_device *dev = info->user_ptr[1];
3392         struct wireless_dev *wdev = dev->ieee80211_ptr;
3393         struct mesh_config cur_params;
3394         int err = 0;
3395         void *hdr;
3396         struct nlattr *pinfoattr;
3397         struct sk_buff *msg;
3398
3399         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3400                 return -EOPNOTSUPP;
3401
3402         if (!rdev->ops->get_mesh_config)
3403                 return -EOPNOTSUPP;
3404
3405         wdev_lock(wdev);
3406         /* If not connected, get default parameters */
3407         if (!wdev->mesh_id_len)
3408                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3409         else
3410                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3411                                                  &cur_params);
3412         wdev_unlock(wdev);
3413
3414         if (err)
3415                 return err;
3416
3417         /* Draw up a netlink message to send back */
3418         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3419         if (!msg)
3420                 return -ENOMEM;
3421         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3422                              NL80211_CMD_GET_MESH_CONFIG);
3423         if (!hdr)
3424                 goto out;
3425         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3426         if (!pinfoattr)
3427                 goto nla_put_failure;
3428         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3429             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3430                         cur_params.dot11MeshRetryTimeout) ||
3431             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3432                         cur_params.dot11MeshConfirmTimeout) ||
3433             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3434                         cur_params.dot11MeshHoldingTimeout) ||
3435             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3436                         cur_params.dot11MeshMaxPeerLinks) ||
3437             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3438                        cur_params.dot11MeshMaxRetries) ||
3439             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3440                        cur_params.dot11MeshTTL) ||
3441             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3442                        cur_params.element_ttl) ||
3443             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3444                        cur_params.auto_open_plinks) ||
3445             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3446                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3447             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3448                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3449             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3450                         cur_params.path_refresh_time) ||
3451             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3452                         cur_params.min_discovery_timeout) ||
3453             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3454                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3455             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3456                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3457             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3458                         cur_params.dot11MeshHWMPperrMinInterval) ||
3459             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3460                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3461             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3462                        cur_params.dot11MeshHWMPRootMode) ||
3463             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3464                         cur_params.dot11MeshHWMPRannInterval) ||
3465             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3466                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3467             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3468                        cur_params.dot11MeshForwarding) ||
3469             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3470                         cur_params.rssi_threshold) ||
3471             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3472                         cur_params.ht_opmode))
3473                 goto nla_put_failure;
3474         nla_nest_end(msg, pinfoattr);
3475         genlmsg_end(msg, hdr);
3476         return genlmsg_reply(msg, info);
3477
3478  nla_put_failure:
3479         genlmsg_cancel(msg, hdr);
3480  out:
3481         nlmsg_free(msg);
3482         return -ENOBUFS;
3483 }
3484
3485 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3486         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3487         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3488         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3489         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3490         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3491         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3492         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3493         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3494         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3495         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3496         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3497         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3498         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3499         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3500         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3501         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3502         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3503         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3504         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3505         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3506         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3507         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3508 };
3509
3510 static const struct nla_policy
3511         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3512         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3513         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3514         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3515         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3516         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3517                                     .len = IEEE80211_MAX_DATA_LEN },
3518         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3519 };
3520
3521 static int nl80211_parse_mesh_config(struct genl_info *info,
3522                                      struct mesh_config *cfg,
3523                                      u32 *mask_out)
3524 {
3525         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3526         u32 mask = 0;
3527
3528 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3529 do {\
3530         if (table[attr_num]) {\
3531                 cfg->param = nla_fn(table[attr_num]); \
3532                 mask |= (1 << (attr_num - 1)); \
3533         } \
3534 } while (0);\
3535
3536
3537         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3538                 return -EINVAL;
3539         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3540                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3541                              nl80211_meshconf_params_policy))
3542                 return -EINVAL;
3543
3544         /* This makes sure that there aren't more than 32 mesh config
3545          * parameters (otherwise our bitfield scheme would not work.) */
3546         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3547
3548         /* Fill in the params struct */
3549         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3550                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3551                                   nla_get_u16);
3552         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3553                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3554                                   nla_get_u16);
3555         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3556                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3557                                   nla_get_u16);
3558         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3559                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3560                                   nla_get_u16);
3561         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3562                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3563                                   nla_get_u8);
3564         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3565                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3566         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3567                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3568                                   nla_get_u8);
3569         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3570                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3571                                   nla_get_u8);
3572         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3573                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3574                                   nla_get_u32);
3575         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3576                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3577                                   nla_get_u8);
3578         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3579                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3580                                   nla_get_u32);
3581         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3582                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3583                                   nla_get_u16);
3584         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3585                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3586                                   nla_get_u32);
3587         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3588                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3589                                   nla_get_u16);
3590         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3591                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3592                                   nla_get_u16);
3593         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3594                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3595                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3596                                   nla_get_u16);
3597         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3598                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3599         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3600                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3601                                   nla_get_u16);
3602         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3603                                   dot11MeshGateAnnouncementProtocol, mask,
3604                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3605                                   nla_get_u8);
3606         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3607                                   mask, NL80211_MESHCONF_FORWARDING,
3608                                   nla_get_u8);
3609         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3610                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3611                                   nla_get_u32);
3612         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3613                                   mask, NL80211_MESHCONF_HT_OPMODE,
3614                                   nla_get_u16);
3615         if (mask_out)
3616                 *mask_out = mask;
3617
3618         return 0;
3619
3620 #undef FILL_IN_MESH_PARAM_IF_SET
3621 }
3622
3623 static int nl80211_parse_mesh_setup(struct genl_info *info,
3624                                      struct mesh_setup *setup)
3625 {
3626         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3627
3628         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3629                 return -EINVAL;
3630         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3631                              info->attrs[NL80211_ATTR_MESH_SETUP],
3632                              nl80211_mesh_setup_params_policy))
3633                 return -EINVAL;
3634
3635         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3636                 setup->sync_method =
3637                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3638                  IEEE80211_SYNC_METHOD_VENDOR :
3639                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3640
3641         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3642                 setup->path_sel_proto =
3643                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3644                  IEEE80211_PATH_PROTOCOL_VENDOR :
3645                  IEEE80211_PATH_PROTOCOL_HWMP;
3646
3647         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3648                 setup->path_metric =
3649                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3650                  IEEE80211_PATH_METRIC_VENDOR :
3651                  IEEE80211_PATH_METRIC_AIRTIME;
3652
3653
3654         if (tb[NL80211_MESH_SETUP_IE]) {
3655                 struct nlattr *ieattr =
3656                         tb[NL80211_MESH_SETUP_IE];
3657                 if (!is_valid_ie_attr(ieattr))
3658                         return -EINVAL;
3659                 setup->ie = nla_data(ieattr);
3660                 setup->ie_len = nla_len(ieattr);
3661         }
3662         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3663         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3664
3665         return 0;
3666 }
3667
3668 static int nl80211_update_mesh_config(struct sk_buff *skb,
3669                                       struct genl_info *info)
3670 {
3671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3672         struct net_device *dev = info->user_ptr[1];
3673         struct wireless_dev *wdev = dev->ieee80211_ptr;
3674         struct mesh_config cfg;
3675         u32 mask;
3676         int err;
3677
3678         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3679                 return -EOPNOTSUPP;
3680
3681         if (!rdev->ops->update_mesh_config)
3682                 return -EOPNOTSUPP;
3683
3684         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3685         if (err)
3686                 return err;
3687
3688         wdev_lock(wdev);
3689         if (!wdev->mesh_id_len)
3690                 err = -ENOLINK;
3691
3692         if (!err)
3693                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3694                                                     mask, &cfg);
3695
3696         wdev_unlock(wdev);
3697
3698         return err;
3699 }
3700
3701 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3702 {
3703         struct sk_buff *msg;
3704         void *hdr = NULL;
3705         struct nlattr *nl_reg_rules;
3706         unsigned int i;
3707         int err = -EINVAL;
3708
3709         mutex_lock(&cfg80211_mutex);
3710
3711         if (!cfg80211_regdomain)
3712                 goto out;
3713
3714         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3715         if (!msg) {
3716                 err = -ENOBUFS;
3717                 goto out;
3718         }
3719
3720         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3721                              NL80211_CMD_GET_REG);
3722         if (!hdr)
3723                 goto put_failure;
3724
3725         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3726                            cfg80211_regdomain->alpha2) ||
3727             (cfg80211_regdomain->dfs_region &&
3728              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3729                         cfg80211_regdomain->dfs_region)))
3730                 goto nla_put_failure;
3731
3732         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3733         if (!nl_reg_rules)
3734                 goto nla_put_failure;
3735
3736         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3737                 struct nlattr *nl_reg_rule;
3738                 const struct ieee80211_reg_rule *reg_rule;
3739                 const struct ieee80211_freq_range *freq_range;
3740                 const struct ieee80211_power_rule *power_rule;
3741
3742                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3743                 freq_range = &reg_rule->freq_range;
3744                 power_rule = &reg_rule->power_rule;
3745
3746                 nl_reg_rule = nla_nest_start(msg, i);
3747                 if (!nl_reg_rule)
3748                         goto nla_put_failure;
3749
3750                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3751                                 reg_rule->flags) ||
3752                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3753                                 freq_range->start_freq_khz) ||
3754                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3755                                 freq_range->end_freq_khz) ||
3756                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3757                                 freq_range->max_bandwidth_khz) ||
3758                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3759                                 power_rule->max_antenna_gain) ||
3760                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3761                                 power_rule->max_eirp))
3762                         goto nla_put_failure;
3763
3764                 nla_nest_end(msg, nl_reg_rule);
3765         }
3766
3767         nla_nest_end(msg, nl_reg_rules);
3768
3769         genlmsg_end(msg, hdr);
3770         err = genlmsg_reply(msg, info);
3771         goto out;
3772
3773 nla_put_failure:
3774         genlmsg_cancel(msg, hdr);
3775 put_failure:
3776         nlmsg_free(msg);
3777         err = -EMSGSIZE;
3778 out:
3779         mutex_unlock(&cfg80211_mutex);
3780         return err;
3781 }
3782
3783 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3784 {
3785         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3786         struct nlattr *nl_reg_rule;
3787         char *alpha2 = NULL;
3788         int rem_reg_rules = 0, r = 0;
3789         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3790         u8 dfs_region = 0;
3791         struct ieee80211_regdomain *rd = NULL;
3792
3793         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3794                 return -EINVAL;
3795
3796         if (!info->attrs[NL80211_ATTR_REG_RULES])
3797                 return -EINVAL;
3798
3799         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3800
3801         if (info->attrs[NL80211_ATTR_DFS_REGION])
3802                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3803
3804         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3805                         rem_reg_rules) {
3806                 num_rules++;
3807                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3808                         return -EINVAL;
3809         }
3810
3811         mutex_lock(&cfg80211_mutex);
3812
3813         if (!reg_is_valid_request(alpha2)) {
3814                 r = -EINVAL;
3815                 goto bad_reg;
3816         }
3817
3818         size_of_regd = sizeof(struct ieee80211_regdomain) +
3819                 (num_rules * sizeof(struct ieee80211_reg_rule));
3820
3821         rd = kzalloc(size_of_regd, GFP_KERNEL);
3822         if (!rd) {
3823                 r = -ENOMEM;
3824                 goto bad_reg;
3825         }
3826
3827         rd->n_reg_rules = num_rules;
3828         rd->alpha2[0] = alpha2[0];
3829         rd->alpha2[1] = alpha2[1];
3830
3831         /*
3832          * Disable DFS master mode if the DFS region was
3833          * not supported or known on this kernel.
3834          */
3835         if (reg_supported_dfs_region(dfs_region))
3836                 rd->dfs_region = dfs_region;
3837
3838         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3839                         rem_reg_rules) {
3840                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3841                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3842                         reg_rule_policy);
3843                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3844                 if (r)
3845                         goto bad_reg;
3846
3847                 rule_idx++;
3848
3849                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3850                         r = -EINVAL;
3851                         goto bad_reg;
3852                 }
3853         }
3854
3855         BUG_ON(rule_idx != num_rules);
3856
3857         r = set_regdom(rd);
3858
3859         mutex_unlock(&cfg80211_mutex);
3860
3861         return r;
3862
3863  bad_reg:
3864         mutex_unlock(&cfg80211_mutex);
3865         kfree(rd);
3866         return r;
3867 }
3868
3869 static int validate_scan_freqs(struct nlattr *freqs)
3870 {
3871         struct nlattr *attr1, *attr2;
3872         int n_channels = 0, tmp1, tmp2;
3873
3874         nla_for_each_nested(attr1, freqs, tmp1) {
3875                 n_channels++;
3876                 /*
3877                  * Some hardware has a limited channel list for
3878                  * scanning, and it is pretty much nonsensical
3879                  * to scan for a channel twice, so disallow that
3880                  * and don't require drivers to check that the
3881                  * channel list they get isn't longer than what
3882                  * they can scan, as long as they can scan all
3883                  * the channels they registered at once.
3884                  */
3885                 nla_for_each_nested(attr2, freqs, tmp2)
3886                         if (attr1 != attr2 &&
3887                             nla_get_u32(attr1) == nla_get_u32(attr2))
3888                                 return 0;
3889         }
3890
3891         return n_channels;
3892 }
3893
3894 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3895 {
3896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3897         struct net_device *dev = info->user_ptr[1];
3898         struct cfg80211_scan_request *request;
3899         struct nlattr *attr;
3900         struct wiphy *wiphy;
3901         int err, tmp, n_ssids = 0, n_channels, i;
3902         size_t ie_len;
3903
3904         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3905                 return -EINVAL;
3906
3907         wiphy = &rdev->wiphy;
3908
3909         if (!rdev->ops->scan)
3910                 return -EOPNOTSUPP;
3911
3912         if (rdev->scan_req)
3913                 return -EBUSY;
3914
3915         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3916                 n_channels = validate_scan_freqs(
3917                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3918                 if (!n_channels)
3919                         return -EINVAL;
3920         } else {
3921                 enum ieee80211_band band;
3922                 n_channels = 0;
3923
3924                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3925                         if (wiphy->bands[band])
3926                                 n_channels += wiphy->bands[band]->n_channels;
3927         }
3928
3929         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3930                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3931                         n_ssids++;
3932
3933         if (n_ssids > wiphy->max_scan_ssids)
3934                 return -EINVAL;
3935
3936         if (info->attrs[NL80211_ATTR_IE])
3937                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3938         else
3939                 ie_len = 0;
3940
3941         if (ie_len > wiphy->max_scan_ie_len)
3942                 return -EINVAL;
3943
3944         request = kzalloc(sizeof(*request)
3945                         + sizeof(*request->ssids) * n_ssids
3946                         + sizeof(*request->channels) * n_channels
3947                         + ie_len, GFP_KERNEL);
3948         if (!request)
3949                 return -ENOMEM;
3950
3951         if (n_ssids)
3952                 request->ssids = (void *)&request->channels[n_channels];
3953         request->n_ssids = n_ssids;
3954         if (ie_len) {
3955                 if (request->ssids)
3956                         request->ie = (void *)(request->ssids + n_ssids);
3957                 else
3958                         request->ie = (void *)(request->channels + n_channels);
3959         }
3960
3961         i = 0;
3962         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3963                 /* user specified, bail out if channel not found */
3964                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3965                         struct ieee80211_channel *chan;
3966
3967                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3968
3969                         if (!chan) {
3970                                 err = -EINVAL;
3971                                 goto out_free;
3972                         }
3973
3974                         /* ignore disabled channels */
3975                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3976                                 continue;
3977
3978                         request->channels[i] = chan;
3979                         i++;
3980                 }
3981         } else {
3982                 enum ieee80211_band band;
3983
3984                 /* all channels */
3985                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3986                         int j;
3987                         if (!wiphy->bands[band])
3988                                 continue;
3989                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3990                                 struct ieee80211_channel *chan;
3991
3992                                 chan = &wiphy->bands[band]->channels[j];
3993
3994                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3995                                         continue;
3996
3997                                 request->channels[i] = chan;
3998                                 i++;
3999                         }
4000                 }
4001         }
4002
4003         if (!i) {
4004                 err = -EINVAL;
4005                 goto out_free;
4006         }
4007
4008         request->n_channels = i;
4009
4010         i = 0;
4011         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4012                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4013                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4014                                 err = -EINVAL;
4015                                 goto out_free;
4016                         }
4017                         request->ssids[i].ssid_len = nla_len(attr);
4018                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4019                         i++;
4020                 }
4021         }
4022
4023         if (info->attrs[NL80211_ATTR_IE]) {
4024                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4025                 memcpy((void *)request->ie,
4026                        nla_data(info->attrs[NL80211_ATTR_IE]),
4027                        request->ie_len);
4028         }
4029
4030         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4031                 if (wiphy->bands[i])
4032                         request->rates[i] =
4033                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4034
4035         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4036                 nla_for_each_nested(attr,
4037                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4038                                     tmp) {
4039                         enum ieee80211_band band = nla_type(attr);
4040
4041                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4042                                 err = -EINVAL;
4043                                 goto out_free;
4044                         }
4045                         err = ieee80211_get_ratemask(wiphy->bands[band],
4046                                                      nla_data(attr),
4047                                                      nla_len(attr),
4048                                                      &request->rates[band]);
4049                         if (err)
4050                                 goto out_free;
4051                 }
4052         }
4053
4054         request->no_cck =
4055                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4056
4057         request->dev = dev;
4058         request->wiphy = &rdev->wiphy;
4059
4060         rdev->scan_req = request;
4061         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4062
4063         if (!err) {
4064                 nl80211_send_scan_start(rdev, dev);
4065                 dev_hold(dev);
4066         } else {
4067  out_free:
4068                 rdev->scan_req = NULL;
4069                 kfree(request);
4070         }
4071
4072         return err;
4073 }
4074
4075 static int nl80211_start_sched_scan(struct sk_buff *skb,
4076                                     struct genl_info *info)
4077 {
4078         struct cfg80211_sched_scan_request *request;
4079         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4080         struct net_device *dev = info->user_ptr[1];
4081         struct nlattr *attr;
4082         struct wiphy *wiphy;
4083         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4084         u32 interval;
4085         enum ieee80211_band band;
4086         size_t ie_len;
4087         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4088
4089         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4090             !rdev->ops->sched_scan_start)
4091                 return -EOPNOTSUPP;
4092
4093         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4094                 return -EINVAL;
4095
4096         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4097                 return -EINVAL;
4098
4099         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4100         if (interval == 0)
4101                 return -EINVAL;
4102
4103         wiphy = &rdev->wiphy;
4104
4105         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4106                 n_channels = validate_scan_freqs(
4107                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4108                 if (!n_channels)
4109                         return -EINVAL;
4110         } else {
4111                 n_channels = 0;
4112
4113                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4114                         if (wiphy->bands[band])
4115                                 n_channels += wiphy->bands[band]->n_channels;
4116         }
4117
4118         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4119                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4120                                     tmp)
4121                         n_ssids++;
4122
4123         if (n_ssids > wiphy->max_sched_scan_ssids)
4124                 return -EINVAL;
4125
4126         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4127                 nla_for_each_nested(attr,
4128                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4129                                     tmp)
4130                         n_match_sets++;
4131
4132         if (n_match_sets > wiphy->max_match_sets)
4133                 return -EINVAL;
4134
4135         if (info->attrs[NL80211_ATTR_IE])
4136                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4137         else
4138                 ie_len = 0;
4139
4140         if (ie_len > wiphy->max_sched_scan_ie_len)
4141                 return -EINVAL;
4142
4143         mutex_lock(&rdev->sched_scan_mtx);
4144
4145         if (rdev->sched_scan_req) {
4146                 err = -EINPROGRESS;
4147                 goto out;
4148         }
4149
4150         request = kzalloc(sizeof(*request)
4151                         + sizeof(*request->ssids) * n_ssids
4152                         + sizeof(*request->match_sets) * n_match_sets
4153                         + sizeof(*request->channels) * n_channels
4154                         + ie_len, GFP_KERNEL);
4155         if (!request) {
4156                 err = -ENOMEM;
4157                 goto out;
4158         }
4159
4160         if (n_ssids)
4161                 request->ssids = (void *)&request->channels[n_channels];
4162         request->n_ssids = n_ssids;
4163         if (ie_len) {
4164                 if (request->ssids)
4165                         request->ie = (void *)(request->ssids + n_ssids);
4166                 else
4167                         request->ie = (void *)(request->channels + n_channels);
4168         }
4169
4170         if (n_match_sets) {
4171                 if (request->ie)
4172                         request->match_sets = (void *)(request->ie + ie_len);
4173                 else if (request->ssids)
4174                         request->match_sets =
4175                                 (void *)(request->ssids + n_ssids);
4176                 else
4177                         request->match_sets =
4178                                 (void *)(request->channels + n_channels);
4179         }
4180         request->n_match_sets = n_match_sets;
4181
4182         i = 0;
4183         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4184                 /* user specified, bail out if channel not found */
4185                 nla_for_each_nested(attr,
4186                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4187                                     tmp) {
4188                         struct ieee80211_channel *chan;
4189
4190                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4191
4192                         if (!chan) {
4193                                 err = -EINVAL;
4194                                 goto out_free;
4195                         }
4196
4197                         /* ignore disabled channels */
4198                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4199                                 continue;
4200
4201                         request->channels[i] = chan;
4202                         i++;
4203                 }
4204         } else {
4205                 /* all channels */
4206                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4207                         int j;
4208                         if (!wiphy->bands[band])
4209                                 continue;
4210                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4211                                 struct ieee80211_channel *chan;
4212
4213                                 chan = &wiphy->bands[band]->channels[j];
4214
4215                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4216                                         continue;
4217
4218                                 request->channels[i] = chan;
4219                                 i++;
4220                         }
4221                 }
4222         }
4223
4224         if (!i) {
4225                 err = -EINVAL;
4226                 goto out_free;
4227         }
4228
4229         request->n_channels = i;
4230
4231         i = 0;
4232         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4233                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4234                                     tmp) {
4235                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4236                                 err = -EINVAL;
4237                                 goto out_free;
4238                         }
4239                         request->ssids[i].ssid_len = nla_len(attr);
4240                         memcpy(request->ssids[i].ssid, nla_data(attr),
4241                                nla_len(attr));
4242                         i++;
4243                 }
4244         }
4245
4246         i = 0;
4247         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4248                 nla_for_each_nested(attr,
4249                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4250                                     tmp) {
4251                         struct nlattr *ssid;
4252
4253                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4254                                   nla_data(attr), nla_len(attr),
4255                                   nl80211_match_policy);
4256                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4257                         if (ssid) {
4258                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4259                                         err = -EINVAL;
4260                                         goto out_free;
4261                                 }
4262                                 memcpy(request->match_sets[i].ssid.ssid,
4263                                        nla_data(ssid), nla_len(ssid));
4264                                 request->match_sets[i].ssid.ssid_len =
4265                                         nla_len(ssid);
4266                         }
4267                         i++;
4268                 }
4269         }
4270
4271         if (info->attrs[NL80211_ATTR_IE]) {
4272                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4273                 memcpy((void *)request->ie,
4274                        nla_data(info->attrs[NL80211_ATTR_IE]),
4275                        request->ie_len);
4276         }
4277
4278         request->dev = dev;
4279         request->wiphy = &rdev->wiphy;
4280         request->interval = interval;
4281
4282         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4283         if (!err) {
4284                 rdev->sched_scan_req = request;
4285                 nl80211_send_sched_scan(rdev, dev,
4286                                         NL80211_CMD_START_SCHED_SCAN);
4287                 goto out;
4288         }
4289
4290 out_free:
4291         kfree(request);
4292 out:
4293         mutex_unlock(&rdev->sched_scan_mtx);
4294         return err;
4295 }
4296
4297 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4298                                    struct genl_info *info)
4299 {
4300         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4301         int err;
4302
4303         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4304             !rdev->ops->sched_scan_stop)
4305                 return -EOPNOTSUPP;
4306
4307         mutex_lock(&rdev->sched_scan_mtx);
4308         err = __cfg80211_stop_sched_scan(rdev, false);
4309         mutex_unlock(&rdev->sched_scan_mtx);
4310
4311         return err;
4312 }
4313
4314 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4315                             u32 seq, int flags,
4316                             struct cfg80211_registered_device *rdev,
4317                             struct wireless_dev *wdev,
4318                             struct cfg80211_internal_bss *intbss)
4319 {
4320         struct cfg80211_bss *res = &intbss->pub;
4321         void *hdr;
4322         struct nlattr *bss;
4323
4324         ASSERT_WDEV_LOCK(wdev);
4325
4326         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4327                              NL80211_CMD_NEW_SCAN_RESULTS);
4328         if (!hdr)
4329                 return -1;
4330
4331         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4332
4333         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4334             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4335                 goto nla_put_failure;
4336
4337         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4338         if (!bss)
4339                 goto nla_put_failure;
4340         if ((!is_zero_ether_addr(res->bssid) &&
4341              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4342             (res->information_elements && res->len_information_elements &&
4343              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4344                      res->len_information_elements,
4345                      res->information_elements)) ||
4346             (res->beacon_ies && res->len_beacon_ies &&
4347              res->beacon_ies != res->information_elements &&
4348              nla_put(msg, NL80211_BSS_BEACON_IES,
4349                      res->len_beacon_ies, res->beacon_ies)))
4350                 goto nla_put_failure;
4351         if (res->tsf &&
4352             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4353                 goto nla_put_failure;
4354         if (res->beacon_interval &&
4355             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4356                 goto nla_put_failure;
4357         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4358             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4359             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4360                         jiffies_to_msecs(jiffies - intbss->ts)))
4361                 goto nla_put_failure;
4362
4363         switch (rdev->wiphy.signal_type) {
4364         case CFG80211_SIGNAL_TYPE_MBM:
4365                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4366                         goto nla_put_failure;
4367                 break;
4368         case CFG80211_SIGNAL_TYPE_UNSPEC:
4369                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4370                         goto nla_put_failure;
4371                 break;
4372         default:
4373                 break;
4374         }
4375
4376         switch (wdev->iftype) {
4377         case NL80211_IFTYPE_P2P_CLIENT:
4378         case NL80211_IFTYPE_STATION:
4379                 if (intbss == wdev->current_bss &&
4380                     nla_put_u32(msg, NL80211_BSS_STATUS,
4381                                 NL80211_BSS_STATUS_ASSOCIATED))
4382                         goto nla_put_failure;
4383                 break;
4384         case NL80211_IFTYPE_ADHOC:
4385                 if (intbss == wdev->current_bss &&
4386                     nla_put_u32(msg, NL80211_BSS_STATUS,
4387                                 NL80211_BSS_STATUS_IBSS_JOINED))
4388                         goto nla_put_failure;
4389                 break;
4390         default:
4391                 break;
4392         }
4393
4394         nla_nest_end(msg, bss);
4395
4396         return genlmsg_end(msg, hdr);
4397
4398  nla_put_failure:
4399         genlmsg_cancel(msg, hdr);
4400         return -EMSGSIZE;
4401 }
4402
4403 static int nl80211_dump_scan(struct sk_buff *skb,
4404                              struct netlink_callback *cb)
4405 {
4406         struct cfg80211_registered_device *rdev;
4407         struct net_device *dev;
4408         struct cfg80211_internal_bss *scan;
4409         struct wireless_dev *wdev;
4410         int start = cb->args[1], idx = 0;
4411         int err;
4412
4413         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4414         if (err)
4415                 return err;
4416
4417         wdev = dev->ieee80211_ptr;
4418
4419         wdev_lock(wdev);
4420         spin_lock_bh(&rdev->bss_lock);
4421         cfg80211_bss_expire(rdev);
4422
4423         cb->seq = rdev->bss_generation;
4424
4425         list_for_each_entry(scan, &rdev->bss_list, list) {
4426                 if (++idx <= start)
4427                         continue;
4428                 if (nl80211_send_bss(skb, cb,
4429                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4430                                 rdev, wdev, scan) < 0) {
4431                         idx--;
4432                         break;
4433                 }
4434         }
4435
4436         spin_unlock_bh(&rdev->bss_lock);
4437         wdev_unlock(wdev);
4438
4439         cb->args[1] = idx;
4440         nl80211_finish_netdev_dump(rdev);
4441
4442         return skb->len;
4443 }
4444
4445 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4446                                 int flags, struct net_device *dev,
4447                                 struct survey_info *survey)
4448 {
4449         void *hdr;
4450         struct nlattr *infoattr;
4451
4452         hdr = nl80211hdr_put(msg, pid, seq, flags,
4453                              NL80211_CMD_NEW_SURVEY_RESULTS);
4454         if (!hdr)
4455                 return -ENOMEM;
4456
4457         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4458                 goto nla_put_failure;
4459
4460         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4461         if (!infoattr)
4462                 goto nla_put_failure;
4463
4464         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4465                         survey->channel->center_freq))
4466                 goto nla_put_failure;
4467
4468         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4469             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4470                 goto nla_put_failure;
4471         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4472             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4473                 goto nla_put_failure;
4474         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4475             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4476                         survey->channel_time))
4477                 goto nla_put_failure;
4478         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4479             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4480                         survey->channel_time_busy))
4481                 goto nla_put_failure;
4482         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4483             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4484                         survey->channel_time_ext_busy))
4485                 goto nla_put_failure;
4486         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4487             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4488                         survey->channel_time_rx))
4489                 goto nla_put_failure;
4490         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4491             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4492                         survey->channel_time_tx))
4493                 goto nla_put_failure;
4494
4495         nla_nest_end(msg, infoattr);
4496
4497         return genlmsg_end(msg, hdr);
4498
4499  nla_put_failure:
4500         genlmsg_cancel(msg, hdr);
4501         return -EMSGSIZE;
4502 }
4503
4504 static int nl80211_dump_survey(struct sk_buff *skb,
4505                         struct netlink_callback *cb)
4506 {
4507         struct survey_info survey;
4508         struct cfg80211_registered_device *dev;
4509         struct net_device *netdev;
4510         int survey_idx = cb->args[1];
4511         int res;
4512
4513         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4514         if (res)
4515                 return res;
4516
4517         if (!dev->ops->dump_survey) {
4518                 res = -EOPNOTSUPP;
4519                 goto out_err;
4520         }
4521
4522         while (1) {
4523                 struct ieee80211_channel *chan;
4524
4525                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4526                                             &survey);
4527                 if (res == -ENOENT)
4528                         break;
4529                 if (res)
4530                         goto out_err;
4531
4532                 /* Survey without a channel doesn't make sense */
4533                 if (!survey.channel) {
4534                         res = -EINVAL;
4535                         goto out;
4536                 }
4537
4538                 chan = ieee80211_get_channel(&dev->wiphy,
4539                                              survey.channel->center_freq);
4540                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4541                         survey_idx++;
4542                         continue;
4543                 }
4544
4545                 if (nl80211_send_survey(skb,
4546                                 NETLINK_CB(cb->skb).pid,
4547                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4548                                 netdev,
4549                                 &survey) < 0)
4550                         goto out;
4551                 survey_idx++;
4552         }
4553
4554  out:
4555         cb->args[1] = survey_idx;
4556         res = skb->len;
4557  out_err:
4558         nl80211_finish_netdev_dump(dev);
4559         return res;
4560 }
4561
4562 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4563 {
4564         return auth_type <= NL80211_AUTHTYPE_MAX;
4565 }
4566
4567 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4568 {
4569         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4570                                   NL80211_WPA_VERSION_2));
4571 }
4572
4573 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4574 {
4575         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4576         struct net_device *dev = info->user_ptr[1];
4577         struct ieee80211_channel *chan;
4578         const u8 *bssid, *ssid, *ie = NULL;
4579         int err, ssid_len, ie_len = 0;
4580         enum nl80211_auth_type auth_type;
4581         struct key_parse key;
4582         bool local_state_change;
4583
4584         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4585                 return -EINVAL;
4586
4587         if (!info->attrs[NL80211_ATTR_MAC])
4588                 return -EINVAL;
4589
4590         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4591                 return -EINVAL;
4592
4593         if (!info->attrs[NL80211_ATTR_SSID])
4594                 return -EINVAL;
4595
4596         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4597                 return -EINVAL;
4598
4599         err = nl80211_parse_key(info, &key);
4600         if (err)
4601                 return err;
4602
4603         if (key.idx >= 0) {
4604                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4605                         return -EINVAL;
4606                 if (!key.p.key || !key.p.key_len)
4607                         return -EINVAL;
4608                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4609                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4610                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4611                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4612                         return -EINVAL;
4613                 if (key.idx > 4)
4614                         return -EINVAL;
4615         } else {
4616                 key.p.key_len = 0;
4617                 key.p.key = NULL;
4618         }
4619
4620         if (key.idx >= 0) {
4621                 int i;
4622                 bool ok = false;
4623                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4624                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4625                                 ok = true;
4626                                 break;
4627                         }
4628                 }
4629                 if (!ok)
4630                         return -EINVAL;
4631         }
4632
4633         if (!rdev->ops->auth)
4634                 return -EOPNOTSUPP;
4635
4636         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4637             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4638                 return -EOPNOTSUPP;
4639
4640         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4641         chan = ieee80211_get_channel(&rdev->wiphy,
4642                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4643         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4644                 return -EINVAL;
4645
4646         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4647         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4648
4649         if (info->attrs[NL80211_ATTR_IE]) {
4650                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4651                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4652         }
4653
4654         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4655         if (!nl80211_valid_auth_type(auth_type))
4656                 return -EINVAL;
4657
4658         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4659
4660         /*
4661          * Since we no longer track auth state, ignore
4662          * requests to only change local state.
4663          */
4664         if (local_state_change)
4665                 return 0;
4666
4667         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4668                                   ssid, ssid_len, ie, ie_len,
4669                                   key.p.key, key.p.key_len, key.idx);
4670 }
4671
4672 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4673                                    struct genl_info *info,
4674                                    struct cfg80211_crypto_settings *settings,
4675                                    int cipher_limit)
4676 {
4677         memset(settings, 0, sizeof(*settings));
4678
4679         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4680
4681         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4682                 u16 proto;
4683                 proto = nla_get_u16(
4684                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4685                 settings->control_port_ethertype = cpu_to_be16(proto);
4686                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4687                     proto != ETH_P_PAE)
4688                         return -EINVAL;
4689                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4690                         settings->control_port_no_encrypt = true;
4691         } else
4692                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4693
4694         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4695                 void *data;
4696                 int len, i;
4697
4698                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4699                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4700                 settings->n_ciphers_pairwise = len / sizeof(u32);
4701
4702                 if (len % sizeof(u32))
4703                         return -EINVAL;
4704
4705                 if (settings->n_ciphers_pairwise > cipher_limit)
4706                         return -EINVAL;
4707
4708                 memcpy(settings->ciphers_pairwise, data, len);
4709
4710                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4711                         if (!cfg80211_supported_cipher_suite(
4712                                         &rdev->wiphy,
4713                                         settings->ciphers_pairwise[i]))
4714                                 return -EINVAL;
4715         }
4716
4717         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4718                 settings->cipher_group =
4719                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4720                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4721                                                      settings->cipher_group))
4722                         return -EINVAL;
4723         }
4724
4725         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4726                 settings->wpa_versions =
4727                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4728                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4729                         return -EINVAL;
4730         }
4731
4732         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4733                 void *data;
4734                 int len;
4735
4736                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4737                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4738                 settings->n_akm_suites = len / sizeof(u32);
4739
4740                 if (len % sizeof(u32))
4741                         return -EINVAL;
4742
4743                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4744                         return -EINVAL;
4745
4746                 memcpy(settings->akm_suites, data, len);
4747         }
4748
4749         return 0;
4750 }
4751
4752 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4753 {
4754         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4755         struct net_device *dev = info->user_ptr[1];
4756         struct cfg80211_crypto_settings crypto;
4757         struct ieee80211_channel *chan;
4758         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4759         int err, ssid_len, ie_len = 0;
4760         bool use_mfp = false;
4761         u32 flags = 0;
4762         struct ieee80211_ht_cap *ht_capa = NULL;
4763         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4764
4765         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4766                 return -EINVAL;
4767
4768         if (!info->attrs[NL80211_ATTR_MAC] ||
4769             !info->attrs[NL80211_ATTR_SSID] ||
4770             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4771                 return -EINVAL;
4772
4773         if (!rdev->ops->assoc)
4774                 return -EOPNOTSUPP;
4775
4776         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4777             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4778                 return -EOPNOTSUPP;
4779
4780         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4781
4782         chan = ieee80211_get_channel(&rdev->wiphy,
4783                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4784         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4785                 return -EINVAL;
4786
4787         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4788         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4789
4790         if (info->attrs[NL80211_ATTR_IE]) {
4791                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4792                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4793         }
4794
4795         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4796                 enum nl80211_mfp mfp =
4797                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4798                 if (mfp == NL80211_MFP_REQUIRED)
4799                         use_mfp = true;
4800                 else if (mfp != NL80211_MFP_NO)
4801                         return -EINVAL;
4802         }
4803
4804         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4805                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4806
4807         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4808                 flags |= ASSOC_REQ_DISABLE_HT;
4809
4810         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4811                 ht_capa_mask =
4812                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4813
4814         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4815                 if (!ht_capa_mask)
4816                         return -EINVAL;
4817                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4818         }
4819
4820         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4821         if (!err)
4822                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4823                                           ssid, ssid_len, ie, ie_len, use_mfp,
4824                                           &crypto, flags, ht_capa,
4825                                           ht_capa_mask);
4826
4827         return err;
4828 }
4829
4830 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4831 {
4832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4833         struct net_device *dev = info->user_ptr[1];
4834         const u8 *ie = NULL, *bssid;
4835         int ie_len = 0;
4836         u16 reason_code;
4837         bool local_state_change;
4838
4839         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4840                 return -EINVAL;
4841
4842         if (!info->attrs[NL80211_ATTR_MAC])
4843                 return -EINVAL;
4844
4845         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4846                 return -EINVAL;
4847
4848         if (!rdev->ops->deauth)
4849                 return -EOPNOTSUPP;
4850
4851         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4852             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4853                 return -EOPNOTSUPP;
4854
4855         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4856
4857         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4858         if (reason_code == 0) {
4859                 /* Reason Code 0 is reserved */
4860                 return -EINVAL;
4861         }
4862
4863         if (info->attrs[NL80211_ATTR_IE]) {
4864                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4865                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4866         }
4867
4868         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4869
4870         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4871                                     local_state_change);
4872 }
4873
4874 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4875 {
4876         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4877         struct net_device *dev = info->user_ptr[1];
4878         const u8 *ie = NULL, *bssid;
4879         int ie_len = 0;
4880         u16 reason_code;
4881         bool local_state_change;
4882
4883         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4884                 return -EINVAL;
4885
4886         if (!info->attrs[NL80211_ATTR_MAC])
4887                 return -EINVAL;
4888
4889         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4890                 return -EINVAL;
4891
4892         if (!rdev->ops->disassoc)
4893                 return -EOPNOTSUPP;
4894
4895         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4896             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4897                 return -EOPNOTSUPP;
4898
4899         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4900
4901         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4902         if (reason_code == 0) {
4903                 /* Reason Code 0 is reserved */
4904                 return -EINVAL;
4905         }
4906
4907         if (info->attrs[NL80211_ATTR_IE]) {
4908                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4909                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4910         }
4911
4912         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4913
4914         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4915                                       local_state_change);
4916 }
4917
4918 static bool
4919 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4920                          int mcast_rate[IEEE80211_NUM_BANDS],
4921                          int rateval)
4922 {
4923         struct wiphy *wiphy = &rdev->wiphy;
4924         bool found = false;
4925         int band, i;
4926
4927         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4928                 struct ieee80211_supported_band *sband;
4929
4930                 sband = wiphy->bands[band];
4931                 if (!sband)
4932                         continue;
4933
4934                 for (i = 0; i < sband->n_bitrates; i++) {
4935                         if (sband->bitrates[i].bitrate == rateval) {
4936                                 mcast_rate[band] = i + 1;
4937                                 found = true;
4938                                 break;
4939                         }
4940                 }
4941         }
4942
4943         return found;
4944 }
4945
4946 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4947 {
4948         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4949         struct net_device *dev = info->user_ptr[1];
4950         struct cfg80211_ibss_params ibss;
4951         struct wiphy *wiphy;
4952         struct cfg80211_cached_keys *connkeys = NULL;
4953         int err;
4954
4955         memset(&ibss, 0, sizeof(ibss));
4956
4957         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4958                 return -EINVAL;
4959
4960         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4961             !info->attrs[NL80211_ATTR_SSID] ||
4962             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4963                 return -EINVAL;
4964
4965         ibss.beacon_interval = 100;
4966
4967         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4968                 ibss.beacon_interval =
4969                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4970                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4971                         return -EINVAL;
4972         }
4973
4974         if (!rdev->ops->join_ibss)
4975                 return -EOPNOTSUPP;
4976
4977         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4978                 return -EOPNOTSUPP;
4979
4980         wiphy = &rdev->wiphy;
4981
4982         if (info->attrs[NL80211_ATTR_MAC]) {
4983                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4984
4985                 if (!is_valid_ether_addr(ibss.bssid))
4986                         return -EINVAL;
4987         }
4988         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4989         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4990
4991         if (info->attrs[NL80211_ATTR_IE]) {
4992                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4993                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4994         }
4995
4996         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4997                 enum nl80211_channel_type channel_type;
4998
4999                 if (!nl80211_valid_channel_type(info, &channel_type))
5000                         return -EINVAL;
5001
5002                 if (channel_type != NL80211_CHAN_NO_HT &&
5003                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5004                         return -EINVAL;
5005
5006                 ibss.channel_type = channel_type;
5007         } else {
5008                 ibss.channel_type = NL80211_CHAN_NO_HT;
5009         }
5010
5011         ibss.channel = rdev_freq_to_chan(rdev,
5012                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5013                 ibss.channel_type);
5014         if (!ibss.channel ||
5015             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5016             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5017                 return -EINVAL;
5018
5019         /* Both channels should be able to initiate communication */
5020         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5021              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5022             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5023                                           ibss.channel_type))
5024                 return -EINVAL;
5025
5026         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5027         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5028
5029         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5030                 u8 *rates =
5031                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5032                 int n_rates =
5033                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5034                 struct ieee80211_supported_band *sband =
5035                         wiphy->bands[ibss.channel->band];
5036
5037                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5038                                              &ibss.basic_rates);
5039                 if (err)
5040                         return err;
5041         }
5042
5043         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5044             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5045                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5046                 return -EINVAL;
5047
5048         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5049                 connkeys = nl80211_parse_connkeys(rdev,
5050                                         info->attrs[NL80211_ATTR_KEYS]);
5051                 if (IS_ERR(connkeys))
5052                         return PTR_ERR(connkeys);
5053         }
5054
5055         ibss.control_port =
5056                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5057
5058         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5059         if (err)
5060                 kfree(connkeys);
5061         return err;
5062 }
5063
5064 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5065 {
5066         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5067         struct net_device *dev = info->user_ptr[1];
5068
5069         if (!rdev->ops->leave_ibss)
5070                 return -EOPNOTSUPP;
5071
5072         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5073                 return -EOPNOTSUPP;
5074
5075         return cfg80211_leave_ibss(rdev, dev, false);
5076 }
5077
5078 #ifdef CONFIG_NL80211_TESTMODE
5079 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5080         .name = "testmode",
5081 };
5082
5083 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5084 {
5085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5086         int err;
5087
5088         if (!info->attrs[NL80211_ATTR_TESTDATA])
5089                 return -EINVAL;
5090
5091         err = -EOPNOTSUPP;
5092         if (rdev->ops->testmode_cmd) {
5093                 rdev->testmode_info = info;
5094                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5095                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5096                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5097                 rdev->testmode_info = NULL;
5098         }
5099
5100         return err;
5101 }
5102
5103 static int nl80211_testmode_dump(struct sk_buff *skb,
5104                                  struct netlink_callback *cb)
5105 {
5106         struct cfg80211_registered_device *rdev;
5107         int err;
5108         long phy_idx;
5109         void *data = NULL;
5110         int data_len = 0;
5111
5112         if (cb->args[0]) {
5113                 /*
5114                  * 0 is a valid index, but not valid for args[0],
5115                  * so we need to offset by 1.
5116                  */
5117                 phy_idx = cb->args[0] - 1;
5118         } else {
5119                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5120                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5121                                   nl80211_policy);
5122                 if (err)
5123                         return err;
5124                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
5125                         phy_idx = nla_get_u32(
5126                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
5127                 } else {
5128                         struct net_device *netdev;
5129
5130                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
5131                                                       nl80211_fam.attrbuf,
5132                                                       &rdev, &netdev);
5133                         if (err)
5134                                 return err;
5135                         dev_put(netdev);
5136                         phy_idx = rdev->wiphy_idx;
5137                         cfg80211_unlock_rdev(rdev);
5138                 }
5139                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5140                         cb->args[1] =
5141                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5142         }
5143
5144         if (cb->args[1]) {
5145                 data = nla_data((void *)cb->args[1]);
5146                 data_len = nla_len((void *)cb->args[1]);
5147         }
5148
5149         mutex_lock(&cfg80211_mutex);
5150         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5151         if (!rdev) {
5152                 mutex_unlock(&cfg80211_mutex);
5153                 return -ENOENT;
5154         }
5155         cfg80211_lock_rdev(rdev);
5156         mutex_unlock(&cfg80211_mutex);
5157
5158         if (!rdev->ops->testmode_dump) {
5159                 err = -EOPNOTSUPP;
5160                 goto out_err;
5161         }
5162
5163         while (1) {
5164                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5165                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5166                                            NL80211_CMD_TESTMODE);
5167                 struct nlattr *tmdata;
5168
5169                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5170                         genlmsg_cancel(skb, hdr);
5171                         break;
5172                 }
5173
5174                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5175                 if (!tmdata) {
5176                         genlmsg_cancel(skb, hdr);
5177                         break;
5178                 }
5179                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5180                                                data, data_len);
5181                 nla_nest_end(skb, tmdata);
5182
5183                 if (err == -ENOBUFS || err == -ENOENT) {
5184                         genlmsg_cancel(skb, hdr);
5185                         break;
5186                 } else if (err) {
5187                         genlmsg_cancel(skb, hdr);
5188                         goto out_err;
5189                 }
5190
5191                 genlmsg_end(skb, hdr);
5192         }
5193
5194         err = skb->len;
5195         /* see above */
5196         cb->args[0] = phy_idx + 1;
5197  out_err:
5198         cfg80211_unlock_rdev(rdev);
5199         return err;
5200 }
5201
5202 static struct sk_buff *
5203 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5204                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5205 {
5206         struct sk_buff *skb;
5207         void *hdr;
5208         struct nlattr *data;
5209
5210         skb = nlmsg_new(approxlen + 100, gfp);
5211         if (!skb)
5212                 return NULL;
5213
5214         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5215         if (!hdr) {
5216                 kfree_skb(skb);
5217                 return NULL;
5218         }
5219
5220         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5221                 goto nla_put_failure;
5222         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5223
5224         ((void **)skb->cb)[0] = rdev;
5225         ((void **)skb->cb)[1] = hdr;
5226         ((void **)skb->cb)[2] = data;
5227
5228         return skb;
5229
5230  nla_put_failure:
5231         kfree_skb(skb);
5232         return NULL;
5233 }
5234
5235 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5236                                                   int approxlen)
5237 {
5238         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5239
5240         if (WARN_ON(!rdev->testmode_info))
5241                 return NULL;
5242
5243         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5244                                 rdev->testmode_info->snd_pid,
5245                                 rdev->testmode_info->snd_seq,
5246                                 GFP_KERNEL);
5247 }
5248 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5249
5250 int cfg80211_testmode_reply(struct sk_buff *skb)
5251 {
5252         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5253         void *hdr = ((void **)skb->cb)[1];
5254         struct nlattr *data = ((void **)skb->cb)[2];
5255
5256         if (WARN_ON(!rdev->testmode_info)) {
5257                 kfree_skb(skb);
5258                 return -EINVAL;
5259         }
5260
5261         nla_nest_end(skb, data);
5262         genlmsg_end(skb, hdr);
5263         return genlmsg_reply(skb, rdev->testmode_info);
5264 }
5265 EXPORT_SYMBOL(cfg80211_testmode_reply);
5266
5267 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5268                                                   int approxlen, gfp_t gfp)
5269 {
5270         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5271
5272         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5273 }
5274 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5275
5276 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5277 {
5278         void *hdr = ((void **)skb->cb)[1];
5279         struct nlattr *data = ((void **)skb->cb)[2];
5280
5281         nla_nest_end(skb, data);
5282         genlmsg_end(skb, hdr);
5283         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5284 }
5285 EXPORT_SYMBOL(cfg80211_testmode_event);
5286 #endif
5287
5288 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5289 {
5290         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5291         struct net_device *dev = info->user_ptr[1];
5292         struct cfg80211_connect_params connect;
5293         struct wiphy *wiphy;
5294         struct cfg80211_cached_keys *connkeys = NULL;
5295         int err;
5296
5297         memset(&connect, 0, sizeof(connect));
5298
5299         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5300                 return -EINVAL;
5301
5302         if (!info->attrs[NL80211_ATTR_SSID] ||
5303             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5304                 return -EINVAL;
5305
5306         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5307                 connect.auth_type =
5308                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5309                 if (!nl80211_valid_auth_type(connect.auth_type))
5310                         return -EINVAL;
5311         } else
5312                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5313
5314         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5315
5316         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5317                                       NL80211_MAX_NR_CIPHER_SUITES);
5318         if (err)
5319                 return err;
5320
5321         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5322             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5323                 return -EOPNOTSUPP;
5324
5325         wiphy = &rdev->wiphy;
5326
5327         connect.bg_scan_period = -1;
5328         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5329                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5330                 connect.bg_scan_period =
5331                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5332         }
5333
5334         if (info->attrs[NL80211_ATTR_MAC])
5335                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5336         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5337         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5338
5339         if (info->attrs[NL80211_ATTR_IE]) {
5340                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5341                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5342         }
5343
5344         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5345                 connect.channel =
5346                         ieee80211_get_channel(wiphy,
5347                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5348                 if (!connect.channel ||
5349                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5350                         return -EINVAL;
5351         }
5352
5353         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5354                 connkeys = nl80211_parse_connkeys(rdev,
5355                                         info->attrs[NL80211_ATTR_KEYS]);
5356                 if (IS_ERR(connkeys))
5357                         return PTR_ERR(connkeys);
5358         }
5359
5360         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5361                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5362
5363         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5364                 memcpy(&connect.ht_capa_mask,
5365                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5366                        sizeof(connect.ht_capa_mask));
5367
5368         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5369                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5370                         return -EINVAL;
5371                 memcpy(&connect.ht_capa,
5372                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5373                        sizeof(connect.ht_capa));
5374         }
5375
5376         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5377         if (err)
5378                 kfree(connkeys);
5379         return err;
5380 }
5381
5382 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5383 {
5384         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5385         struct net_device *dev = info->user_ptr[1];
5386         u16 reason;
5387
5388         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5389                 reason = WLAN_REASON_DEAUTH_LEAVING;
5390         else
5391                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5392
5393         if (reason == 0)
5394                 return -EINVAL;
5395
5396         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5397             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5398                 return -EOPNOTSUPP;
5399
5400         return cfg80211_disconnect(rdev, dev, reason, true);
5401 }
5402
5403 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5404 {
5405         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5406         struct net *net;
5407         int err;
5408         u32 pid;
5409
5410         if (!info->attrs[NL80211_ATTR_PID])
5411                 return -EINVAL;
5412
5413         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5414
5415         net = get_net_ns_by_pid(pid);
5416         if (IS_ERR(net))
5417                 return PTR_ERR(net);
5418
5419         err = 0;
5420
5421         /* check if anything to do */
5422         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5423                 err = cfg80211_switch_netns(rdev, net);
5424
5425         put_net(net);
5426         return err;
5427 }
5428
5429 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5430 {
5431         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5432         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5433                         struct cfg80211_pmksa *pmksa) = NULL;
5434         struct net_device *dev = info->user_ptr[1];
5435         struct cfg80211_pmksa pmksa;
5436
5437         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5438
5439         if (!info->attrs[NL80211_ATTR_MAC])
5440                 return -EINVAL;
5441
5442         if (!info->attrs[NL80211_ATTR_PMKID])
5443                 return -EINVAL;
5444
5445         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5446         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5447
5448         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5449             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5450                 return -EOPNOTSUPP;
5451
5452         switch (info->genlhdr->cmd) {
5453         case NL80211_CMD_SET_PMKSA:
5454                 rdev_ops = rdev->ops->set_pmksa;
5455                 break;
5456         case NL80211_CMD_DEL_PMKSA:
5457                 rdev_ops = rdev->ops->del_pmksa;
5458                 break;
5459         default:
5460                 WARN_ON(1);
5461                 break;
5462         }
5463
5464         if (!rdev_ops)
5465                 return -EOPNOTSUPP;
5466
5467         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5468 }
5469
5470 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5471 {
5472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5473         struct net_device *dev = info->user_ptr[1];
5474
5475         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5476             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5477                 return -EOPNOTSUPP;
5478
5479         if (!rdev->ops->flush_pmksa)
5480                 return -EOPNOTSUPP;
5481
5482         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5483 }
5484
5485 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5486 {
5487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5488         struct net_device *dev = info->user_ptr[1];
5489         u8 action_code, dialog_token;
5490         u16 status_code;
5491         u8 *peer;
5492
5493         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5494             !rdev->ops->tdls_mgmt)
5495                 return -EOPNOTSUPP;
5496
5497         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5498             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5499             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5500             !info->attrs[NL80211_ATTR_IE] ||
5501             !info->attrs[NL80211_ATTR_MAC])
5502                 return -EINVAL;
5503
5504         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5505         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5506         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5507         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5508
5509         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5510                                     dialog_token, status_code,
5511                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5512                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5513 }
5514
5515 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5516 {
5517         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5518         struct net_device *dev = info->user_ptr[1];
5519         enum nl80211_tdls_operation operation;
5520         u8 *peer;
5521
5522         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5523             !rdev->ops->tdls_oper)
5524                 return -EOPNOTSUPP;
5525
5526         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5527             !info->attrs[NL80211_ATTR_MAC])
5528                 return -EINVAL;
5529
5530         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5531         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5532
5533         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5534 }
5535
5536 static int nl80211_remain_on_channel(struct sk_buff *skb,
5537                                      struct genl_info *info)
5538 {
5539         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5540         struct net_device *dev = info->user_ptr[1];
5541         struct ieee80211_channel *chan;
5542         struct sk_buff *msg;
5543         void *hdr;
5544         u64 cookie;
5545         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5546         u32 freq, duration;
5547         int err;
5548
5549         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5550             !info->attrs[NL80211_ATTR_DURATION])
5551                 return -EINVAL;
5552
5553         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5554
5555         if (!rdev->ops->remain_on_channel ||
5556             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5557                 return -EOPNOTSUPP;
5558
5559         /*
5560          * We should be on that channel for at least a minimum amount of
5561          * time (10ms) but no longer than the driver supports.
5562          */
5563         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5564             duration > rdev->wiphy.max_remain_on_channel_duration)
5565                 return -EINVAL;
5566
5567         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5568             !nl80211_valid_channel_type(info, &channel_type))
5569                 return -EINVAL;
5570
5571         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5572         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5573         if (chan == NULL)
5574                 return -EINVAL;
5575
5576         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5577         if (!msg)
5578                 return -ENOMEM;
5579
5580         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5581                              NL80211_CMD_REMAIN_ON_CHANNEL);
5582
5583         if (IS_ERR(hdr)) {
5584                 err = PTR_ERR(hdr);
5585                 goto free_msg;
5586         }
5587
5588         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5589                                            channel_type, duration, &cookie);
5590
5591         if (err)
5592                 goto free_msg;
5593
5594         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5595                 goto nla_put_failure;
5596
5597         genlmsg_end(msg, hdr);
5598
5599         return genlmsg_reply(msg, info);
5600
5601  nla_put_failure:
5602         err = -ENOBUFS;
5603  free_msg:
5604         nlmsg_free(msg);
5605         return err;
5606 }
5607
5608 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5609                                             struct genl_info *info)
5610 {
5611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5612         struct net_device *dev = info->user_ptr[1];
5613         u64 cookie;
5614
5615         if (!info->attrs[NL80211_ATTR_COOKIE])
5616                 return -EINVAL;
5617
5618         if (!rdev->ops->cancel_remain_on_channel)
5619                 return -EOPNOTSUPP;
5620
5621         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5622
5623         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5624 }
5625
5626 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5627                            u8 *rates, u8 rates_len)
5628 {
5629         u8 i;
5630         u32 mask = 0;
5631
5632         for (i = 0; i < rates_len; i++) {
5633                 int rate = (rates[i] & 0x7f) * 5;
5634                 int ridx;
5635                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5636                         struct ieee80211_rate *srate =
5637                                 &sband->bitrates[ridx];
5638                         if (rate == srate->bitrate) {
5639                                 mask |= 1 << ridx;
5640                                 break;
5641                         }
5642                 }
5643                 if (ridx == sband->n_bitrates)
5644                         return 0; /* rate not found */
5645         }
5646
5647         return mask;
5648 }
5649
5650 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5651                                u8 *rates, u8 rates_len,
5652                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5653 {
5654         u8 i;
5655
5656         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5657
5658         for (i = 0; i < rates_len; i++) {
5659                 int ridx, rbit;
5660
5661                 ridx = rates[i] / 8;
5662                 rbit = BIT(rates[i] % 8);
5663
5664                 /* check validity */
5665                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5666                         return false;
5667
5668                 /* check availability */
5669                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5670                         mcs[ridx] |= rbit;
5671                 else
5672                         return false;
5673         }
5674
5675         return true;
5676 }
5677
5678 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5679         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5680                                     .len = NL80211_MAX_SUPP_RATES },
5681         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5682                                  .len = NL80211_MAX_SUPP_HT_RATES },
5683 };
5684
5685 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5686                                        struct genl_info *info)
5687 {
5688         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5690         struct cfg80211_bitrate_mask mask;
5691         int rem, i;
5692         struct net_device *dev = info->user_ptr[1];
5693         struct nlattr *tx_rates;
5694         struct ieee80211_supported_band *sband;
5695
5696         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5697                 return -EINVAL;
5698
5699         if (!rdev->ops->set_bitrate_mask)
5700                 return -EOPNOTSUPP;
5701
5702         memset(&mask, 0, sizeof(mask));
5703         /* Default to all rates enabled */
5704         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5705                 sband = rdev->wiphy.bands[i];
5706                 mask.control[i].legacy =
5707                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5708                 if (sband)
5709                         memcpy(mask.control[i].mcs,
5710                                sband->ht_cap.mcs.rx_mask,
5711                                sizeof(mask.control[i].mcs));
5712                 else
5713                         memset(mask.control[i].mcs, 0,
5714                                sizeof(mask.control[i].mcs));
5715         }
5716
5717         /*
5718          * The nested attribute uses enum nl80211_band as the index. This maps
5719          * directly to the enum ieee80211_band values used in cfg80211.
5720          */
5721         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5722         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5723         {
5724                 enum ieee80211_band band = nla_type(tx_rates);
5725                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5726                         return -EINVAL;
5727                 sband = rdev->wiphy.bands[band];
5728                 if (sband == NULL)
5729                         return -EINVAL;
5730                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5731                           nla_len(tx_rates), nl80211_txattr_policy);
5732                 if (tb[NL80211_TXRATE_LEGACY]) {
5733                         mask.control[band].legacy = rateset_to_mask(
5734                                 sband,
5735                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5736                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5737                         if ((mask.control[band].legacy == 0) &&
5738                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5739                                 return -EINVAL;
5740                 }
5741                 if (tb[NL80211_TXRATE_MCS]) {
5742                         if (!ht_rateset_to_mask(
5743                                         sband,
5744                                         nla_data(tb[NL80211_TXRATE_MCS]),
5745                                         nla_len(tb[NL80211_TXRATE_MCS]),
5746                                         mask.control[band].mcs))
5747                                 return -EINVAL;
5748                 }
5749
5750                 if (mask.control[band].legacy == 0) {
5751                         /* don't allow empty legacy rates if HT
5752                          * is not even supported. */
5753                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5754                                 return -EINVAL;
5755
5756                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5757                                 if (mask.control[band].mcs[i])
5758                                         break;
5759
5760                         /* legacy and mcs rates may not be both empty */
5761                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5762                                 return -EINVAL;
5763                 }
5764         }
5765
5766         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5767 }
5768
5769 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5770 {
5771         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5772         struct net_device *dev = info->user_ptr[1];
5773         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5774
5775         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5776                 return -EINVAL;
5777
5778         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5779                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5780
5781         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5782             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5783             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5784             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5785             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5786             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5787             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5788                 return -EOPNOTSUPP;
5789
5790         /* not much point in registering if we can't reply */
5791         if (!rdev->ops->mgmt_tx)
5792                 return -EOPNOTSUPP;
5793
5794         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5795                         frame_type,
5796                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5797                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5798 }
5799
5800 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5801 {
5802         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5803         struct net_device *dev = info->user_ptr[1];
5804         struct ieee80211_channel *chan;
5805         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5806         bool channel_type_valid = false;
5807         u32 freq;
5808         int err;
5809         void *hdr = NULL;
5810         u64 cookie;
5811         struct sk_buff *msg = NULL;
5812         unsigned int wait = 0;
5813         bool offchan, no_cck, dont_wait_for_ack;
5814
5815         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5816
5817         if (!info->attrs[NL80211_ATTR_FRAME] ||
5818             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5819                 return -EINVAL;
5820
5821         if (!rdev->ops->mgmt_tx)
5822                 return -EOPNOTSUPP;
5823
5824         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5825             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5826             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5827             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5828             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5829             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5830             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5831                 return -EOPNOTSUPP;
5832
5833         if (info->attrs[NL80211_ATTR_DURATION]) {
5834                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5835                         return -EINVAL;
5836                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5837
5838                 /*
5839                  * We should wait on the channel for at least a minimum amount
5840                  * of time (10ms) but no longer than the driver supports.
5841                  */
5842                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5843                     wait > rdev->wiphy.max_remain_on_channel_duration)
5844                         return -EINVAL;
5845
5846         }
5847
5848         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5849                 if (!nl80211_valid_channel_type(info, &channel_type))
5850                         return -EINVAL;
5851                 channel_type_valid = true;
5852         }
5853
5854         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5855
5856         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5857                 return -EINVAL;
5858
5859         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5860
5861         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5862         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5863         if (chan == NULL)
5864                 return -EINVAL;
5865
5866         if (!dont_wait_for_ack) {
5867                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5868                 if (!msg)
5869                         return -ENOMEM;
5870
5871                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5872                                      NL80211_CMD_FRAME);
5873
5874                 if (IS_ERR(hdr)) {
5875                         err = PTR_ERR(hdr);
5876                         goto free_msg;
5877                 }
5878         }
5879
5880         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5881                                     channel_type_valid, wait,
5882                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5883                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5884                                     no_cck, dont_wait_for_ack, &cookie);
5885         if (err)
5886                 goto free_msg;
5887
5888         if (msg) {
5889                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5890                         goto nla_put_failure;
5891
5892                 genlmsg_end(msg, hdr);
5893                 return genlmsg_reply(msg, info);
5894         }
5895
5896         return 0;
5897
5898  nla_put_failure:
5899         err = -ENOBUFS;
5900  free_msg:
5901         nlmsg_free(msg);
5902         return err;
5903 }
5904
5905 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5906 {
5907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5908         struct net_device *dev = info->user_ptr[1];
5909         u64 cookie;
5910
5911         if (!info->attrs[NL80211_ATTR_COOKIE])
5912                 return -EINVAL;
5913
5914         if (!rdev->ops->mgmt_tx_cancel_wait)
5915                 return -EOPNOTSUPP;
5916
5917         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5918             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5919             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5920             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5921             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5922             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5923                 return -EOPNOTSUPP;
5924
5925         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5926
5927         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5928 }
5929
5930 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5931 {
5932         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5933         struct wireless_dev *wdev;
5934         struct net_device *dev = info->user_ptr[1];
5935         u8 ps_state;
5936         bool state;
5937         int err;
5938
5939         if (!info->attrs[NL80211_ATTR_PS_STATE])
5940                 return -EINVAL;
5941
5942         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5943
5944         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5945                 return -EINVAL;
5946
5947         wdev = dev->ieee80211_ptr;
5948
5949         if (!rdev->ops->set_power_mgmt)
5950                 return -EOPNOTSUPP;
5951
5952         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5953
5954         if (state == wdev->ps)
5955                 return 0;
5956
5957         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5958                                         wdev->ps_timeout);
5959         if (!err)
5960                 wdev->ps = state;
5961         return err;
5962 }
5963
5964 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5965 {
5966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5967         enum nl80211_ps_state ps_state;
5968         struct wireless_dev *wdev;
5969         struct net_device *dev = info->user_ptr[1];
5970         struct sk_buff *msg;
5971         void *hdr;
5972         int err;
5973
5974         wdev = dev->ieee80211_ptr;
5975
5976         if (!rdev->ops->set_power_mgmt)
5977                 return -EOPNOTSUPP;
5978
5979         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5980         if (!msg)
5981                 return -ENOMEM;
5982
5983         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5984                              NL80211_CMD_GET_POWER_SAVE);
5985         if (!hdr) {
5986                 err = -ENOBUFS;
5987                 goto free_msg;
5988         }
5989
5990         if (wdev->ps)
5991                 ps_state = NL80211_PS_ENABLED;
5992         else
5993                 ps_state = NL80211_PS_DISABLED;
5994
5995         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
5996                 goto nla_put_failure;
5997
5998         genlmsg_end(msg, hdr);
5999         return genlmsg_reply(msg, info);
6000
6001  nla_put_failure:
6002         err = -ENOBUFS;
6003  free_msg:
6004         nlmsg_free(msg);
6005         return err;
6006 }
6007
6008 static struct nla_policy
6009 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6010         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6011         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6012         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6013 };
6014
6015 static int nl80211_set_cqm_rssi(struct genl_info *info,
6016                                 s32 threshold, u32 hysteresis)
6017 {
6018         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6019         struct wireless_dev *wdev;
6020         struct net_device *dev = info->user_ptr[1];
6021
6022         if (threshold > 0)
6023                 return -EINVAL;
6024
6025         wdev = dev->ieee80211_ptr;
6026
6027         if (!rdev->ops->set_cqm_rssi_config)
6028                 return -EOPNOTSUPP;
6029
6030         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6031             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6032                 return -EOPNOTSUPP;
6033
6034         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6035                                               threshold, hysteresis);
6036 }
6037
6038 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6039 {
6040         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6041         struct nlattr *cqm;
6042         int err;
6043
6044         cqm = info->attrs[NL80211_ATTR_CQM];
6045         if (!cqm) {
6046                 err = -EINVAL;
6047                 goto out;
6048         }
6049
6050         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6051                                nl80211_attr_cqm_policy);
6052         if (err)
6053                 goto out;
6054
6055         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6056             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6057                 s32 threshold;
6058                 u32 hysteresis;
6059                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6060                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6061                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6062         } else
6063                 err = -EINVAL;
6064
6065 out:
6066         return err;
6067 }
6068
6069 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6070 {
6071         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6072         struct net_device *dev = info->user_ptr[1];
6073         struct mesh_config cfg;
6074         struct mesh_setup setup;
6075         int err;
6076
6077         /* start with default */
6078         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6079         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6080
6081         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6082                 /* and parse parameters if given */
6083                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6084                 if (err)
6085                         return err;
6086         }
6087
6088         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6089             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6090                 return -EINVAL;
6091
6092         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6093         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6094
6095         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6096             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6097                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6098                         return -EINVAL;
6099
6100         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6101                 /* parse additional setup parameters if given */
6102                 err = nl80211_parse_mesh_setup(info, &setup);
6103                 if (err)
6104                         return err;
6105         }
6106
6107         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6108                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6109
6110                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6111                     !nl80211_valid_channel_type(info, &channel_type))
6112                         return -EINVAL;
6113
6114                 setup.channel = rdev_freq_to_chan(rdev,
6115                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6116                         channel_type);
6117                 if (!setup.channel)
6118                         return -EINVAL;
6119                 setup.channel_type = channel_type;
6120         } else {
6121                 /* cfg80211_join_mesh() will sort it out */
6122                 setup.channel = NULL;
6123         }
6124
6125         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6126 }
6127
6128 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6129 {
6130         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6131         struct net_device *dev = info->user_ptr[1];
6132
6133         return cfg80211_leave_mesh(rdev, dev);
6134 }
6135
6136 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6137 {
6138         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6139         struct sk_buff *msg;
6140         void *hdr;
6141
6142         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6143                 return -EOPNOTSUPP;
6144
6145         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6146         if (!msg)
6147                 return -ENOMEM;
6148
6149         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6150                              NL80211_CMD_GET_WOWLAN);
6151         if (!hdr)
6152                 goto nla_put_failure;
6153
6154         if (rdev->wowlan) {
6155                 struct nlattr *nl_wowlan;
6156
6157                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6158                 if (!nl_wowlan)
6159                         goto nla_put_failure;
6160
6161                 if ((rdev->wowlan->any &&
6162                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6163                     (rdev->wowlan->disconnect &&
6164                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6165                     (rdev->wowlan->magic_pkt &&
6166                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6167                     (rdev->wowlan->gtk_rekey_failure &&
6168                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6169                     (rdev->wowlan->eap_identity_req &&
6170                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6171                     (rdev->wowlan->four_way_handshake &&
6172                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6173                     (rdev->wowlan->rfkill_release &&
6174                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6175                         goto nla_put_failure;
6176                 if (rdev->wowlan->n_patterns) {
6177                         struct nlattr *nl_pats, *nl_pat;
6178                         int i, pat_len;
6179
6180                         nl_pats = nla_nest_start(msg,
6181                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6182                         if (!nl_pats)
6183                                 goto nla_put_failure;
6184
6185                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6186                                 nl_pat = nla_nest_start(msg, i + 1);
6187                                 if (!nl_pat)
6188                                         goto nla_put_failure;
6189                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6190                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6191                                             DIV_ROUND_UP(pat_len, 8),
6192                                             rdev->wowlan->patterns[i].mask) ||
6193                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6194                                             pat_len,
6195                                             rdev->wowlan->patterns[i].pattern))
6196                                         goto nla_put_failure;
6197                                 nla_nest_end(msg, nl_pat);
6198                         }
6199                         nla_nest_end(msg, nl_pats);
6200                 }
6201
6202                 nla_nest_end(msg, nl_wowlan);
6203         }
6204
6205         genlmsg_end(msg, hdr);
6206         return genlmsg_reply(msg, info);
6207
6208 nla_put_failure:
6209         nlmsg_free(msg);
6210         return -ENOBUFS;
6211 }
6212
6213 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6214 {
6215         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6216         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6217         struct cfg80211_wowlan no_triggers = {};
6218         struct cfg80211_wowlan new_triggers = {};
6219         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6220         int err, i;
6221         bool prev_enabled = rdev->wowlan;
6222
6223         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6224                 return -EOPNOTSUPP;
6225
6226         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6227                 goto no_triggers;
6228
6229         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6230                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6231                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6232                         nl80211_wowlan_policy);
6233         if (err)
6234                 return err;
6235
6236         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6237                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6238                         return -EINVAL;
6239                 new_triggers.any = true;
6240         }
6241
6242         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6243                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6244                         return -EINVAL;
6245                 new_triggers.disconnect = true;
6246         }
6247
6248         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6249                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6250                         return -EINVAL;
6251                 new_triggers.magic_pkt = true;
6252         }
6253
6254         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6255                 return -EINVAL;
6256
6257         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6258                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6259                         return -EINVAL;
6260                 new_triggers.gtk_rekey_failure = true;
6261         }
6262
6263         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6264                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6265                         return -EINVAL;
6266                 new_triggers.eap_identity_req = true;
6267         }
6268
6269         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6270                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6271                         return -EINVAL;
6272                 new_triggers.four_way_handshake = true;
6273         }
6274
6275         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6276                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6277                         return -EINVAL;
6278                 new_triggers.rfkill_release = true;
6279         }
6280
6281         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6282                 struct nlattr *pat;
6283                 int n_patterns = 0;
6284                 int rem, pat_len, mask_len;
6285                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6286
6287                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6288                                     rem)
6289                         n_patterns++;
6290                 if (n_patterns > wowlan->n_patterns)
6291                         return -EINVAL;
6292
6293                 new_triggers.patterns = kcalloc(n_patterns,
6294                                                 sizeof(new_triggers.patterns[0]),
6295                                                 GFP_KERNEL);
6296                 if (!new_triggers.patterns)
6297                         return -ENOMEM;
6298
6299                 new_triggers.n_patterns = n_patterns;
6300                 i = 0;
6301
6302                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6303                                     rem) {
6304                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6305                                   nla_data(pat), nla_len(pat), NULL);
6306                         err = -EINVAL;
6307                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6308                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6309                                 goto error;
6310                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6311                         mask_len = DIV_ROUND_UP(pat_len, 8);
6312                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6313                             mask_len)
6314                                 goto error;
6315                         if (pat_len > wowlan->pattern_max_len ||
6316                             pat_len < wowlan->pattern_min_len)
6317                                 goto error;
6318
6319                         new_triggers.patterns[i].mask =
6320                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6321                         if (!new_triggers.patterns[i].mask) {
6322                                 err = -ENOMEM;
6323                                 goto error;
6324                         }
6325                         new_triggers.patterns[i].pattern =
6326                                 new_triggers.patterns[i].mask + mask_len;
6327                         memcpy(new_triggers.patterns[i].mask,
6328                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6329                                mask_len);
6330                         new_triggers.patterns[i].pattern_len = pat_len;
6331                         memcpy(new_triggers.patterns[i].pattern,
6332                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6333                                pat_len);
6334                         i++;
6335                 }
6336         }
6337
6338         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6339                 struct cfg80211_wowlan *ntrig;
6340                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6341                                 GFP_KERNEL);
6342                 if (!ntrig) {
6343                         err = -ENOMEM;
6344                         goto error;
6345                 }
6346                 cfg80211_rdev_free_wowlan(rdev);
6347                 rdev->wowlan = ntrig;
6348         } else {
6349  no_triggers:
6350                 cfg80211_rdev_free_wowlan(rdev);
6351                 rdev->wowlan = NULL;
6352         }
6353
6354         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6355                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6356
6357         return 0;
6358  error:
6359         for (i = 0; i < new_triggers.n_patterns; i++)
6360                 kfree(new_triggers.patterns[i].mask);
6361         kfree(new_triggers.patterns);
6362         return err;
6363 }
6364
6365 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6366 {
6367         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6368         struct net_device *dev = info->user_ptr[1];
6369         struct wireless_dev *wdev = dev->ieee80211_ptr;
6370         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6371         struct cfg80211_gtk_rekey_data rekey_data;
6372         int err;
6373
6374         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6375                 return -EINVAL;
6376
6377         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6378                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6379                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6380                         nl80211_rekey_policy);
6381         if (err)
6382                 return err;
6383
6384         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6385                 return -ERANGE;
6386         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6387                 return -ERANGE;
6388         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6389                 return -ERANGE;
6390
6391         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6392                NL80211_KEK_LEN);
6393         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6394                NL80211_KCK_LEN);
6395         memcpy(rekey_data.replay_ctr,
6396                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6397                NL80211_REPLAY_CTR_LEN);
6398
6399         wdev_lock(wdev);
6400         if (!wdev->current_bss) {
6401                 err = -ENOTCONN;
6402                 goto out;
6403         }
6404
6405         if (!rdev->ops->set_rekey_data) {
6406                 err = -EOPNOTSUPP;
6407                 goto out;
6408         }
6409
6410         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6411  out:
6412         wdev_unlock(wdev);
6413         return err;
6414 }
6415
6416 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6417                                              struct genl_info *info)
6418 {
6419         struct net_device *dev = info->user_ptr[1];
6420         struct wireless_dev *wdev = dev->ieee80211_ptr;
6421
6422         if (wdev->iftype != NL80211_IFTYPE_AP &&
6423             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6424                 return -EINVAL;
6425
6426         if (wdev->ap_unexpected_nlpid)
6427                 return -EBUSY;
6428
6429         wdev->ap_unexpected_nlpid = info->snd_pid;
6430         return 0;
6431 }
6432
6433 static int nl80211_probe_client(struct sk_buff *skb,
6434                                 struct genl_info *info)
6435 {
6436         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6437         struct net_device *dev = info->user_ptr[1];
6438         struct wireless_dev *wdev = dev->ieee80211_ptr;
6439         struct sk_buff *msg;
6440         void *hdr;
6441         const u8 *addr;
6442         u64 cookie;
6443         int err;
6444
6445         if (wdev->iftype != NL80211_IFTYPE_AP &&
6446             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6447                 return -EOPNOTSUPP;
6448
6449         if (!info->attrs[NL80211_ATTR_MAC])
6450                 return -EINVAL;
6451
6452         if (!rdev->ops->probe_client)
6453                 return -EOPNOTSUPP;
6454
6455         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6456         if (!msg)
6457                 return -ENOMEM;
6458
6459         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6460                              NL80211_CMD_PROBE_CLIENT);
6461
6462         if (IS_ERR(hdr)) {
6463                 err = PTR_ERR(hdr);
6464                 goto free_msg;
6465         }
6466
6467         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6468
6469         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6470         if (err)
6471                 goto free_msg;
6472
6473         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6474                 goto nla_put_failure;
6475
6476         genlmsg_end(msg, hdr);
6477
6478         return genlmsg_reply(msg, info);
6479
6480  nla_put_failure:
6481         err = -ENOBUFS;
6482  free_msg:
6483         nlmsg_free(msg);
6484         return err;
6485 }
6486
6487 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6488 {
6489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6490
6491         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6492                 return -EOPNOTSUPP;
6493
6494         if (rdev->ap_beacons_nlpid)
6495                 return -EBUSY;
6496
6497         rdev->ap_beacons_nlpid = info->snd_pid;
6498
6499         return 0;
6500 }
6501
6502 #define NL80211_FLAG_NEED_WIPHY         0x01
6503 #define NL80211_FLAG_NEED_NETDEV        0x02
6504 #define NL80211_FLAG_NEED_RTNL          0x04
6505 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6506 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6507                                          NL80211_FLAG_CHECK_NETDEV_UP)
6508
6509 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6510                             struct genl_info *info)
6511 {
6512         struct cfg80211_registered_device *rdev;
6513         struct net_device *dev;
6514         int err;
6515         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6516
6517         if (rtnl)
6518                 rtnl_lock();
6519
6520         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6521                 rdev = cfg80211_get_dev_from_info(info);
6522                 if (IS_ERR(rdev)) {
6523                         if (rtnl)
6524                                 rtnl_unlock();
6525                         return PTR_ERR(rdev);
6526                 }
6527                 info->user_ptr[0] = rdev;
6528         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6529                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6530                                               &rdev, &dev);
6531                 if (err) {
6532                         if (rtnl)
6533                                 rtnl_unlock();
6534                         return err;
6535                 }
6536                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6537                     !netif_running(dev)) {
6538                         cfg80211_unlock_rdev(rdev);
6539                         dev_put(dev);
6540                         if (rtnl)
6541                                 rtnl_unlock();
6542                         return -ENETDOWN;
6543                 }
6544                 info->user_ptr[0] = rdev;
6545                 info->user_ptr[1] = dev;
6546         }
6547
6548         return 0;
6549 }
6550
6551 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6552                               struct genl_info *info)
6553 {
6554         if (info->user_ptr[0])
6555                 cfg80211_unlock_rdev(info->user_ptr[0]);
6556         if (info->user_ptr[1])
6557                 dev_put(info->user_ptr[1]);
6558         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6559                 rtnl_unlock();
6560 }
6561
6562 static struct genl_ops nl80211_ops[] = {
6563         {
6564                 .cmd = NL80211_CMD_GET_WIPHY,
6565                 .doit = nl80211_get_wiphy,
6566                 .dumpit = nl80211_dump_wiphy,
6567                 .policy = nl80211_policy,
6568                 /* can be retrieved by unprivileged users */
6569                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6570         },
6571         {
6572                 .cmd = NL80211_CMD_SET_WIPHY,
6573                 .doit = nl80211_set_wiphy,
6574                 .policy = nl80211_policy,
6575                 .flags = GENL_ADMIN_PERM,
6576                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6577         },
6578         {
6579                 .cmd = NL80211_CMD_GET_INTERFACE,
6580                 .doit = nl80211_get_interface,
6581                 .dumpit = nl80211_dump_interface,
6582                 .policy = nl80211_policy,
6583                 /* can be retrieved by unprivileged users */
6584                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6585         },
6586         {
6587                 .cmd = NL80211_CMD_SET_INTERFACE,
6588                 .doit = nl80211_set_interface,
6589                 .policy = nl80211_policy,
6590                 .flags = GENL_ADMIN_PERM,
6591                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6592                                   NL80211_FLAG_NEED_RTNL,
6593         },
6594         {
6595                 .cmd = NL80211_CMD_NEW_INTERFACE,
6596                 .doit = nl80211_new_interface,
6597                 .policy = nl80211_policy,
6598                 .flags = GENL_ADMIN_PERM,
6599                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6600                                   NL80211_FLAG_NEED_RTNL,
6601         },
6602         {
6603                 .cmd = NL80211_CMD_DEL_INTERFACE,
6604                 .doit = nl80211_del_interface,
6605                 .policy = nl80211_policy,
6606                 .flags = GENL_ADMIN_PERM,
6607                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6608                                   NL80211_FLAG_NEED_RTNL,
6609         },
6610         {
6611                 .cmd = NL80211_CMD_GET_KEY,
6612                 .doit = nl80211_get_key,
6613                 .policy = nl80211_policy,
6614                 .flags = GENL_ADMIN_PERM,
6615                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6616                                   NL80211_FLAG_NEED_RTNL,
6617         },
6618         {
6619                 .cmd = NL80211_CMD_SET_KEY,
6620                 .doit = nl80211_set_key,
6621                 .policy = nl80211_policy,
6622                 .flags = GENL_ADMIN_PERM,
6623                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6624                                   NL80211_FLAG_NEED_RTNL,
6625         },
6626         {
6627                 .cmd = NL80211_CMD_NEW_KEY,
6628                 .doit = nl80211_new_key,
6629                 .policy = nl80211_policy,
6630                 .flags = GENL_ADMIN_PERM,
6631                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6632                                   NL80211_FLAG_NEED_RTNL,
6633         },
6634         {
6635                 .cmd = NL80211_CMD_DEL_KEY,
6636                 .doit = nl80211_del_key,
6637                 .policy = nl80211_policy,
6638                 .flags = GENL_ADMIN_PERM,
6639                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6640                                   NL80211_FLAG_NEED_RTNL,
6641         },
6642         {
6643                 .cmd = NL80211_CMD_SET_BEACON,
6644                 .policy = nl80211_policy,
6645                 .flags = GENL_ADMIN_PERM,
6646                 .doit = nl80211_set_beacon,
6647                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6648                                   NL80211_FLAG_NEED_RTNL,
6649         },
6650         {
6651                 .cmd = NL80211_CMD_START_AP,
6652                 .policy = nl80211_policy,
6653                 .flags = GENL_ADMIN_PERM,
6654                 .doit = nl80211_start_ap,
6655                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6656                                   NL80211_FLAG_NEED_RTNL,
6657         },
6658         {
6659                 .cmd = NL80211_CMD_STOP_AP,
6660                 .policy = nl80211_policy,
6661                 .flags = GENL_ADMIN_PERM,
6662                 .doit = nl80211_stop_ap,
6663                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6664                                   NL80211_FLAG_NEED_RTNL,
6665         },
6666         {
6667                 .cmd = NL80211_CMD_GET_STATION,
6668                 .doit = nl80211_get_station,
6669                 .dumpit = nl80211_dump_station,
6670                 .policy = nl80211_policy,
6671                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6672                                   NL80211_FLAG_NEED_RTNL,
6673         },
6674         {
6675                 .cmd = NL80211_CMD_SET_STATION,
6676                 .doit = nl80211_set_station,
6677                 .policy = nl80211_policy,
6678                 .flags = GENL_ADMIN_PERM,
6679                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6680                                   NL80211_FLAG_NEED_RTNL,
6681         },
6682         {
6683                 .cmd = NL80211_CMD_NEW_STATION,
6684                 .doit = nl80211_new_station,
6685                 .policy = nl80211_policy,
6686                 .flags = GENL_ADMIN_PERM,
6687                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6688                                   NL80211_FLAG_NEED_RTNL,
6689         },
6690         {
6691                 .cmd = NL80211_CMD_DEL_STATION,
6692                 .doit = nl80211_del_station,
6693                 .policy = nl80211_policy,
6694                 .flags = GENL_ADMIN_PERM,
6695                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6696                                   NL80211_FLAG_NEED_RTNL,
6697         },
6698         {
6699                 .cmd = NL80211_CMD_GET_MPATH,
6700                 .doit = nl80211_get_mpath,
6701                 .dumpit = nl80211_dump_mpath,
6702                 .policy = nl80211_policy,
6703                 .flags = GENL_ADMIN_PERM,
6704                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6705                                   NL80211_FLAG_NEED_RTNL,
6706         },
6707         {
6708                 .cmd = NL80211_CMD_SET_MPATH,
6709                 .doit = nl80211_set_mpath,
6710                 .policy = nl80211_policy,
6711                 .flags = GENL_ADMIN_PERM,
6712                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6713                                   NL80211_FLAG_NEED_RTNL,
6714         },
6715         {
6716                 .cmd = NL80211_CMD_NEW_MPATH,
6717                 .doit = nl80211_new_mpath,
6718                 .policy = nl80211_policy,
6719                 .flags = GENL_ADMIN_PERM,
6720                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6721                                   NL80211_FLAG_NEED_RTNL,
6722         },
6723         {
6724                 .cmd = NL80211_CMD_DEL_MPATH,
6725                 .doit = nl80211_del_mpath,
6726                 .policy = nl80211_policy,
6727                 .flags = GENL_ADMIN_PERM,
6728                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6729                                   NL80211_FLAG_NEED_RTNL,
6730         },
6731         {
6732                 .cmd = NL80211_CMD_SET_BSS,
6733                 .doit = nl80211_set_bss,
6734                 .policy = nl80211_policy,
6735                 .flags = GENL_ADMIN_PERM,
6736                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6737                                   NL80211_FLAG_NEED_RTNL,
6738         },
6739         {
6740                 .cmd = NL80211_CMD_GET_REG,
6741                 .doit = nl80211_get_reg,
6742                 .policy = nl80211_policy,
6743                 /* can be retrieved by unprivileged users */
6744         },
6745         {
6746                 .cmd = NL80211_CMD_SET_REG,
6747                 .doit = nl80211_set_reg,
6748                 .policy = nl80211_policy,
6749                 .flags = GENL_ADMIN_PERM,
6750         },
6751         {
6752                 .cmd = NL80211_CMD_REQ_SET_REG,
6753                 .doit = nl80211_req_set_reg,
6754                 .policy = nl80211_policy,
6755                 .flags = GENL_ADMIN_PERM,
6756         },
6757         {
6758                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6759                 .doit = nl80211_get_mesh_config,
6760                 .policy = nl80211_policy,
6761                 /* can be retrieved by unprivileged users */
6762                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6763                                   NL80211_FLAG_NEED_RTNL,
6764         },
6765         {
6766                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6767                 .doit = nl80211_update_mesh_config,
6768                 .policy = nl80211_policy,
6769                 .flags = GENL_ADMIN_PERM,
6770                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6771                                   NL80211_FLAG_NEED_RTNL,
6772         },
6773         {
6774                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6775                 .doit = nl80211_trigger_scan,
6776                 .policy = nl80211_policy,
6777                 .flags = GENL_ADMIN_PERM,
6778                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6779                                   NL80211_FLAG_NEED_RTNL,
6780         },
6781         {
6782                 .cmd = NL80211_CMD_GET_SCAN,
6783                 .policy = nl80211_policy,
6784                 .dumpit = nl80211_dump_scan,
6785         },
6786         {
6787                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6788                 .doit = nl80211_start_sched_scan,
6789                 .policy = nl80211_policy,
6790                 .flags = GENL_ADMIN_PERM,
6791                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6792                                   NL80211_FLAG_NEED_RTNL,
6793         },
6794         {
6795                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6796                 .doit = nl80211_stop_sched_scan,
6797                 .policy = nl80211_policy,
6798                 .flags = GENL_ADMIN_PERM,
6799                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6800                                   NL80211_FLAG_NEED_RTNL,
6801         },
6802         {
6803                 .cmd = NL80211_CMD_AUTHENTICATE,
6804                 .doit = nl80211_authenticate,
6805                 .policy = nl80211_policy,
6806                 .flags = GENL_ADMIN_PERM,
6807                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6808                                   NL80211_FLAG_NEED_RTNL,
6809         },
6810         {
6811                 .cmd = NL80211_CMD_ASSOCIATE,
6812                 .doit = nl80211_associate,
6813                 .policy = nl80211_policy,
6814                 .flags = GENL_ADMIN_PERM,
6815                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6816                                   NL80211_FLAG_NEED_RTNL,
6817         },
6818         {
6819                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6820                 .doit = nl80211_deauthenticate,
6821                 .policy = nl80211_policy,
6822                 .flags = GENL_ADMIN_PERM,
6823                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6824                                   NL80211_FLAG_NEED_RTNL,
6825         },
6826         {
6827                 .cmd = NL80211_CMD_DISASSOCIATE,
6828                 .doit = nl80211_disassociate,
6829                 .policy = nl80211_policy,
6830                 .flags = GENL_ADMIN_PERM,
6831                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6832                                   NL80211_FLAG_NEED_RTNL,
6833         },
6834         {
6835                 .cmd = NL80211_CMD_JOIN_IBSS,
6836                 .doit = nl80211_join_ibss,
6837                 .policy = nl80211_policy,
6838                 .flags = GENL_ADMIN_PERM,
6839                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6840                                   NL80211_FLAG_NEED_RTNL,
6841         },
6842         {
6843                 .cmd = NL80211_CMD_LEAVE_IBSS,
6844                 .doit = nl80211_leave_ibss,
6845                 .policy = nl80211_policy,
6846                 .flags = GENL_ADMIN_PERM,
6847                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6848                                   NL80211_FLAG_NEED_RTNL,
6849         },
6850 #ifdef CONFIG_NL80211_TESTMODE
6851         {
6852                 .cmd = NL80211_CMD_TESTMODE,
6853                 .doit = nl80211_testmode_do,
6854                 .dumpit = nl80211_testmode_dump,
6855                 .policy = nl80211_policy,
6856                 .flags = GENL_ADMIN_PERM,
6857                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6858                                   NL80211_FLAG_NEED_RTNL,
6859         },
6860 #endif
6861         {
6862                 .cmd = NL80211_CMD_CONNECT,
6863                 .doit = nl80211_connect,
6864                 .policy = nl80211_policy,
6865                 .flags = GENL_ADMIN_PERM,
6866                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6867                                   NL80211_FLAG_NEED_RTNL,
6868         },
6869         {
6870                 .cmd = NL80211_CMD_DISCONNECT,
6871                 .doit = nl80211_disconnect,
6872                 .policy = nl80211_policy,
6873                 .flags = GENL_ADMIN_PERM,
6874                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6875                                   NL80211_FLAG_NEED_RTNL,
6876         },
6877         {
6878                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6879                 .doit = nl80211_wiphy_netns,
6880                 .policy = nl80211_policy,
6881                 .flags = GENL_ADMIN_PERM,
6882                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6883                                   NL80211_FLAG_NEED_RTNL,
6884         },
6885         {
6886                 .cmd = NL80211_CMD_GET_SURVEY,
6887                 .policy = nl80211_policy,
6888                 .dumpit = nl80211_dump_survey,
6889         },
6890         {
6891                 .cmd = NL80211_CMD_SET_PMKSA,
6892                 .doit = nl80211_setdel_pmksa,
6893                 .policy = nl80211_policy,
6894                 .flags = GENL_ADMIN_PERM,
6895                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6896                                   NL80211_FLAG_NEED_RTNL,
6897         },
6898         {
6899                 .cmd = NL80211_CMD_DEL_PMKSA,
6900                 .doit = nl80211_setdel_pmksa,
6901                 .policy = nl80211_policy,
6902                 .flags = GENL_ADMIN_PERM,
6903                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6904                                   NL80211_FLAG_NEED_RTNL,
6905         },
6906         {
6907                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6908                 .doit = nl80211_flush_pmksa,
6909                 .policy = nl80211_policy,
6910                 .flags = GENL_ADMIN_PERM,
6911                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6912                                   NL80211_FLAG_NEED_RTNL,
6913         },
6914         {
6915                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6916                 .doit = nl80211_remain_on_channel,
6917                 .policy = nl80211_policy,
6918                 .flags = GENL_ADMIN_PERM,
6919                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6920                                   NL80211_FLAG_NEED_RTNL,
6921         },
6922         {
6923                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6924                 .doit = nl80211_cancel_remain_on_channel,
6925                 .policy = nl80211_policy,
6926                 .flags = GENL_ADMIN_PERM,
6927                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6928                                   NL80211_FLAG_NEED_RTNL,
6929         },
6930         {
6931                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6932                 .doit = nl80211_set_tx_bitrate_mask,
6933                 .policy = nl80211_policy,
6934                 .flags = GENL_ADMIN_PERM,
6935                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6936                                   NL80211_FLAG_NEED_RTNL,
6937         },
6938         {
6939                 .cmd = NL80211_CMD_REGISTER_FRAME,
6940                 .doit = nl80211_register_mgmt,
6941                 .policy = nl80211_policy,
6942                 .flags = GENL_ADMIN_PERM,
6943                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6944                                   NL80211_FLAG_NEED_RTNL,
6945         },
6946         {
6947                 .cmd = NL80211_CMD_FRAME,
6948                 .doit = nl80211_tx_mgmt,
6949                 .policy = nl80211_policy,
6950                 .flags = GENL_ADMIN_PERM,
6951                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6952                                   NL80211_FLAG_NEED_RTNL,
6953         },
6954         {
6955                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6956                 .doit = nl80211_tx_mgmt_cancel_wait,
6957                 .policy = nl80211_policy,
6958                 .flags = GENL_ADMIN_PERM,
6959                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6960                                   NL80211_FLAG_NEED_RTNL,
6961         },
6962         {
6963                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6964                 .doit = nl80211_set_power_save,
6965                 .policy = nl80211_policy,
6966                 .flags = GENL_ADMIN_PERM,
6967                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6968                                   NL80211_FLAG_NEED_RTNL,
6969         },
6970         {
6971                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6972                 .doit = nl80211_get_power_save,
6973                 .policy = nl80211_policy,
6974                 /* can be retrieved by unprivileged users */
6975                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6976                                   NL80211_FLAG_NEED_RTNL,
6977         },
6978         {
6979                 .cmd = NL80211_CMD_SET_CQM,
6980                 .doit = nl80211_set_cqm,
6981                 .policy = nl80211_policy,
6982                 .flags = GENL_ADMIN_PERM,
6983                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6984                                   NL80211_FLAG_NEED_RTNL,
6985         },
6986         {
6987                 .cmd = NL80211_CMD_SET_CHANNEL,
6988                 .doit = nl80211_set_channel,
6989                 .policy = nl80211_policy,
6990                 .flags = GENL_ADMIN_PERM,
6991                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6992                                   NL80211_FLAG_NEED_RTNL,
6993         },
6994         {
6995                 .cmd = NL80211_CMD_SET_WDS_PEER,
6996                 .doit = nl80211_set_wds_peer,
6997                 .policy = nl80211_policy,
6998                 .flags = GENL_ADMIN_PERM,
6999                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7000                                   NL80211_FLAG_NEED_RTNL,
7001         },
7002         {
7003                 .cmd = NL80211_CMD_JOIN_MESH,
7004                 .doit = nl80211_join_mesh,
7005                 .policy = nl80211_policy,
7006                 .flags = GENL_ADMIN_PERM,
7007                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7008                                   NL80211_FLAG_NEED_RTNL,
7009         },
7010         {
7011                 .cmd = NL80211_CMD_LEAVE_MESH,
7012                 .doit = nl80211_leave_mesh,
7013                 .policy = nl80211_policy,
7014                 .flags = GENL_ADMIN_PERM,
7015                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7016                                   NL80211_FLAG_NEED_RTNL,
7017         },
7018         {
7019                 .cmd = NL80211_CMD_GET_WOWLAN,
7020                 .doit = nl80211_get_wowlan,
7021                 .policy = nl80211_policy,
7022                 /* can be retrieved by unprivileged users */
7023                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7024                                   NL80211_FLAG_NEED_RTNL,
7025         },
7026         {
7027                 .cmd = NL80211_CMD_SET_WOWLAN,
7028                 .doit = nl80211_set_wowlan,
7029                 .policy = nl80211_policy,
7030                 .flags = GENL_ADMIN_PERM,
7031                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7032                                   NL80211_FLAG_NEED_RTNL,
7033         },
7034         {
7035                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7036                 .doit = nl80211_set_rekey_data,
7037                 .policy = nl80211_policy,
7038                 .flags = GENL_ADMIN_PERM,
7039                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7040                                   NL80211_FLAG_NEED_RTNL,
7041         },
7042         {
7043                 .cmd = NL80211_CMD_TDLS_MGMT,
7044                 .doit = nl80211_tdls_mgmt,
7045                 .policy = nl80211_policy,
7046                 .flags = GENL_ADMIN_PERM,
7047                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7048                                   NL80211_FLAG_NEED_RTNL,
7049         },
7050         {
7051                 .cmd = NL80211_CMD_TDLS_OPER,
7052                 .doit = nl80211_tdls_oper,
7053                 .policy = nl80211_policy,
7054                 .flags = GENL_ADMIN_PERM,
7055                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7056                                   NL80211_FLAG_NEED_RTNL,
7057         },
7058         {
7059                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7060                 .doit = nl80211_register_unexpected_frame,
7061                 .policy = nl80211_policy,
7062                 .flags = GENL_ADMIN_PERM,
7063                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7064                                   NL80211_FLAG_NEED_RTNL,
7065         },
7066         {
7067                 .cmd = NL80211_CMD_PROBE_CLIENT,
7068                 .doit = nl80211_probe_client,
7069                 .policy = nl80211_policy,
7070                 .flags = GENL_ADMIN_PERM,
7071                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7072                                   NL80211_FLAG_NEED_RTNL,
7073         },
7074         {
7075                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7076                 .doit = nl80211_register_beacons,
7077                 .policy = nl80211_policy,
7078                 .flags = GENL_ADMIN_PERM,
7079                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7080                                   NL80211_FLAG_NEED_RTNL,
7081         },
7082         {
7083                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7084                 .doit = nl80211_set_noack_map,
7085                 .policy = nl80211_policy,
7086                 .flags = GENL_ADMIN_PERM,
7087                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7088                                   NL80211_FLAG_NEED_RTNL,
7089         },
7090
7091 };
7092
7093 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7094         .name = "mlme",
7095 };
7096
7097 /* multicast groups */
7098 static struct genl_multicast_group nl80211_config_mcgrp = {
7099         .name = "config",
7100 };
7101 static struct genl_multicast_group nl80211_scan_mcgrp = {
7102         .name = "scan",
7103 };
7104 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7105         .name = "regulatory",
7106 };
7107
7108 /* notification functions */
7109
7110 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7111 {
7112         struct sk_buff *msg;
7113
7114         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7115         if (!msg)
7116                 return;
7117
7118         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7119                 nlmsg_free(msg);
7120                 return;
7121         }
7122
7123         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7124                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7125 }
7126
7127 static int nl80211_add_scan_req(struct sk_buff *msg,
7128                                 struct cfg80211_registered_device *rdev)
7129 {
7130         struct cfg80211_scan_request *req = rdev->scan_req;
7131         struct nlattr *nest;
7132         int i;
7133
7134         ASSERT_RDEV_LOCK(rdev);
7135
7136         if (WARN_ON(!req))
7137                 return 0;
7138
7139         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7140         if (!nest)
7141                 goto nla_put_failure;
7142         for (i = 0; i < req->n_ssids; i++) {
7143                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7144                         goto nla_put_failure;
7145         }
7146         nla_nest_end(msg, nest);
7147
7148         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7149         if (!nest)
7150                 goto nla_put_failure;
7151         for (i = 0; i < req->n_channels; i++) {
7152                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7153                         goto nla_put_failure;
7154         }
7155         nla_nest_end(msg, nest);
7156
7157         if (req->ie &&
7158             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7159                 goto nla_put_failure;
7160
7161         return 0;
7162  nla_put_failure:
7163         return -ENOBUFS;
7164 }
7165
7166 static int nl80211_send_scan_msg(struct sk_buff *msg,
7167                                  struct cfg80211_registered_device *rdev,
7168                                  struct net_device *netdev,
7169                                  u32 pid, u32 seq, int flags,
7170                                  u32 cmd)
7171 {
7172         void *hdr;
7173
7174         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7175         if (!hdr)
7176                 return -1;
7177
7178         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7179             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7180                 goto nla_put_failure;
7181
7182         /* ignore errors and send incomplete event anyway */
7183         nl80211_add_scan_req(msg, rdev);
7184
7185         return genlmsg_end(msg, hdr);
7186
7187  nla_put_failure:
7188         genlmsg_cancel(msg, hdr);
7189         return -EMSGSIZE;
7190 }
7191
7192 static int
7193 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7194                             struct cfg80211_registered_device *rdev,
7195                             struct net_device *netdev,
7196                             u32 pid, u32 seq, int flags, u32 cmd)
7197 {
7198         void *hdr;
7199
7200         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7201         if (!hdr)
7202                 return -1;
7203
7204         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7205             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7206                 goto nla_put_failure;
7207
7208         return genlmsg_end(msg, hdr);
7209
7210  nla_put_failure:
7211         genlmsg_cancel(msg, hdr);
7212         return -EMSGSIZE;
7213 }
7214
7215 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7216                              struct net_device *netdev)
7217 {
7218         struct sk_buff *msg;
7219
7220         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7221         if (!msg)
7222                 return;
7223
7224         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7225                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7226                 nlmsg_free(msg);
7227                 return;
7228         }
7229
7230         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7231                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7232 }
7233
7234 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7235                             struct net_device *netdev)
7236 {
7237         struct sk_buff *msg;
7238
7239         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7240         if (!msg)
7241                 return;
7242
7243         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7244                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7245                 nlmsg_free(msg);
7246                 return;
7247         }
7248
7249         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7250                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7251 }
7252
7253 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7254                                struct net_device *netdev)
7255 {
7256         struct sk_buff *msg;
7257
7258         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7259         if (!msg)
7260                 return;
7261
7262         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7263                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7264                 nlmsg_free(msg);
7265                 return;
7266         }
7267
7268         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7269                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7270 }
7271
7272 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7273                                      struct net_device *netdev)
7274 {
7275         struct sk_buff *msg;
7276
7277         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7278         if (!msg)
7279                 return;
7280
7281         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7282                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7283                 nlmsg_free(msg);
7284                 return;
7285         }
7286
7287         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7288                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7289 }
7290
7291 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7292                              struct net_device *netdev, u32 cmd)
7293 {
7294         struct sk_buff *msg;
7295
7296         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7297         if (!msg)
7298                 return;
7299
7300         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7301                 nlmsg_free(msg);
7302                 return;
7303         }
7304
7305         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7306                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7307 }
7308
7309 /*
7310  * This can happen on global regulatory changes or device specific settings
7311  * based on custom world regulatory domains.
7312  */
7313 void nl80211_send_reg_change_event(struct regulatory_request *request)
7314 {
7315         struct sk_buff *msg;
7316         void *hdr;
7317
7318         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7319         if (!msg)
7320                 return;
7321
7322         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7323         if (!hdr) {
7324                 nlmsg_free(msg);
7325                 return;
7326         }
7327
7328         /* Userspace can always count this one always being set */
7329         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7330                 goto nla_put_failure;
7331
7332         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7333                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7334                                NL80211_REGDOM_TYPE_WORLD))
7335                         goto nla_put_failure;
7336         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7337                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7338                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7339                         goto nla_put_failure;
7340         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7341                    request->intersect) {
7342                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7343                                NL80211_REGDOM_TYPE_INTERSECTION))
7344                         goto nla_put_failure;
7345         } else {
7346                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7347                                NL80211_REGDOM_TYPE_COUNTRY) ||
7348                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7349                                    request->alpha2))
7350                         goto nla_put_failure;
7351         }
7352
7353         if (wiphy_idx_valid(request->wiphy_idx) &&
7354             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7355                 goto nla_put_failure;
7356
7357         genlmsg_end(msg, hdr);
7358
7359         rcu_read_lock();
7360         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7361                                 GFP_ATOMIC);
7362         rcu_read_unlock();
7363
7364         return;
7365
7366 nla_put_failure:
7367         genlmsg_cancel(msg, hdr);
7368         nlmsg_free(msg);
7369 }
7370
7371 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7372                                     struct net_device *netdev,
7373                                     const u8 *buf, size_t len,
7374                                     enum nl80211_commands cmd, gfp_t gfp)
7375 {
7376         struct sk_buff *msg;
7377         void *hdr;
7378
7379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7380         if (!msg)
7381                 return;
7382
7383         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7384         if (!hdr) {
7385                 nlmsg_free(msg);
7386                 return;
7387         }
7388
7389         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7390             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7391             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7392                 goto nla_put_failure;
7393
7394         genlmsg_end(msg, hdr);
7395
7396         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7397                                 nl80211_mlme_mcgrp.id, gfp);
7398         return;
7399
7400  nla_put_failure:
7401         genlmsg_cancel(msg, hdr);
7402         nlmsg_free(msg);
7403 }
7404
7405 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7406                           struct net_device *netdev, const u8 *buf,
7407                           size_t len, gfp_t gfp)
7408 {
7409         nl80211_send_mlme_event(rdev, netdev, buf, len,
7410                                 NL80211_CMD_AUTHENTICATE, gfp);
7411 }
7412
7413 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7414                            struct net_device *netdev, const u8 *buf,
7415                            size_t len, gfp_t gfp)
7416 {
7417         nl80211_send_mlme_event(rdev, netdev, buf, len,
7418                                 NL80211_CMD_ASSOCIATE, gfp);
7419 }
7420
7421 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7422                          struct net_device *netdev, const u8 *buf,
7423                          size_t len, gfp_t gfp)
7424 {
7425         nl80211_send_mlme_event(rdev, netdev, buf, len,
7426                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7427 }
7428
7429 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7430                            struct net_device *netdev, const u8 *buf,
7431                            size_t len, gfp_t gfp)
7432 {
7433         nl80211_send_mlme_event(rdev, netdev, buf, len,
7434                                 NL80211_CMD_DISASSOCIATE, gfp);
7435 }
7436
7437 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7438                                 struct net_device *netdev, const u8 *buf,
7439                                 size_t len, gfp_t gfp)
7440 {
7441         nl80211_send_mlme_event(rdev, netdev, buf, len,
7442                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7443 }
7444
7445 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7446                                   struct net_device *netdev, const u8 *buf,
7447                                   size_t len, gfp_t gfp)
7448 {
7449         nl80211_send_mlme_event(rdev, netdev, buf, len,
7450                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7451 }
7452
7453 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7454                                       struct net_device *netdev, int cmd,
7455                                       const u8 *addr, gfp_t gfp)
7456 {
7457         struct sk_buff *msg;
7458         void *hdr;
7459
7460         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7461         if (!msg)
7462                 return;
7463
7464         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7465         if (!hdr) {
7466                 nlmsg_free(msg);
7467                 return;
7468         }
7469
7470         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7471             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7472             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7473             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7474                 goto nla_put_failure;
7475
7476         genlmsg_end(msg, hdr);
7477
7478         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7479                                 nl80211_mlme_mcgrp.id, gfp);
7480         return;
7481
7482  nla_put_failure:
7483         genlmsg_cancel(msg, hdr);
7484         nlmsg_free(msg);
7485 }
7486
7487 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7488                                struct net_device *netdev, const u8 *addr,
7489                                gfp_t gfp)
7490 {
7491         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7492                                   addr, gfp);
7493 }
7494
7495 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7496                                 struct net_device *netdev, const u8 *addr,
7497                                 gfp_t gfp)
7498 {
7499         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7500                                   addr, gfp);
7501 }
7502
7503 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7504                                  struct net_device *netdev, const u8 *bssid,
7505                                  const u8 *req_ie, size_t req_ie_len,
7506                                  const u8 *resp_ie, size_t resp_ie_len,
7507                                  u16 status, gfp_t gfp)
7508 {
7509         struct sk_buff *msg;
7510         void *hdr;
7511
7512         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7513         if (!msg)
7514                 return;
7515
7516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7517         if (!hdr) {
7518                 nlmsg_free(msg);
7519                 return;
7520         }
7521
7522         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7523             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7524             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7525             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7526             (req_ie &&
7527              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7528             (resp_ie &&
7529              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7530                 goto nla_put_failure;
7531
7532         genlmsg_end(msg, hdr);
7533
7534         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7535                                 nl80211_mlme_mcgrp.id, gfp);
7536         return;
7537
7538  nla_put_failure:
7539         genlmsg_cancel(msg, hdr);
7540         nlmsg_free(msg);
7541
7542 }
7543
7544 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7545                          struct net_device *netdev, const u8 *bssid,
7546                          const u8 *req_ie, size_t req_ie_len,
7547                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7548 {
7549         struct sk_buff *msg;
7550         void *hdr;
7551
7552         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7553         if (!msg)
7554                 return;
7555
7556         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7557         if (!hdr) {
7558                 nlmsg_free(msg);
7559                 return;
7560         }
7561
7562         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7563             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7564             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7565             (req_ie &&
7566              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7567             (resp_ie &&
7568              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7569                 goto nla_put_failure;
7570
7571         genlmsg_end(msg, hdr);
7572
7573         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7574                                 nl80211_mlme_mcgrp.id, gfp);
7575         return;
7576
7577  nla_put_failure:
7578         genlmsg_cancel(msg, hdr);
7579         nlmsg_free(msg);
7580
7581 }
7582
7583 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7584                                struct net_device *netdev, u16 reason,
7585                                const u8 *ie, size_t ie_len, bool from_ap)
7586 {
7587         struct sk_buff *msg;
7588         void *hdr;
7589
7590         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7591         if (!msg)
7592                 return;
7593
7594         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7595         if (!hdr) {
7596                 nlmsg_free(msg);
7597                 return;
7598         }
7599
7600         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7601             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7602             (from_ap && reason &&
7603              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7604             (from_ap &&
7605              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7606             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7607                 goto nla_put_failure;
7608
7609         genlmsg_end(msg, hdr);
7610
7611         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7612                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7613         return;
7614
7615  nla_put_failure:
7616         genlmsg_cancel(msg, hdr);
7617         nlmsg_free(msg);
7618
7619 }
7620
7621 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7622                              struct net_device *netdev, const u8 *bssid,
7623                              gfp_t gfp)
7624 {
7625         struct sk_buff *msg;
7626         void *hdr;
7627
7628         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7629         if (!msg)
7630                 return;
7631
7632         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7633         if (!hdr) {
7634                 nlmsg_free(msg);
7635                 return;
7636         }
7637
7638         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7639             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7640             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7641                 goto nla_put_failure;
7642
7643         genlmsg_end(msg, hdr);
7644
7645         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7646                                 nl80211_mlme_mcgrp.id, gfp);
7647         return;
7648
7649  nla_put_failure:
7650         genlmsg_cancel(msg, hdr);
7651         nlmsg_free(msg);
7652 }
7653
7654 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7655                 struct net_device *netdev,
7656                 const u8 *macaddr, const u8* ie, u8 ie_len,
7657                 gfp_t gfp)
7658 {
7659         struct sk_buff *msg;
7660         void *hdr;
7661
7662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7663         if (!msg)
7664                 return;
7665
7666         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7667         if (!hdr) {
7668                 nlmsg_free(msg);
7669                 return;
7670         }
7671
7672         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7673             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7674             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7675             (ie_len && ie &&
7676              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7677                 goto nla_put_failure;
7678
7679         genlmsg_end(msg, hdr);
7680
7681         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7682                                 nl80211_mlme_mcgrp.id, gfp);
7683         return;
7684
7685  nla_put_failure:
7686         genlmsg_cancel(msg, hdr);
7687         nlmsg_free(msg);
7688 }
7689
7690 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7691                                  struct net_device *netdev, const u8 *addr,
7692                                  enum nl80211_key_type key_type, int key_id,
7693                                  const u8 *tsc, gfp_t gfp)
7694 {
7695         struct sk_buff *msg;
7696         void *hdr;
7697
7698         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7699         if (!msg)
7700                 return;
7701
7702         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7703         if (!hdr) {
7704                 nlmsg_free(msg);
7705                 return;
7706         }
7707
7708         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7709             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7710             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7711             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7712             (key_id != -1 &&
7713              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7714             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7715                 goto nla_put_failure;
7716
7717         genlmsg_end(msg, hdr);
7718
7719         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7720                                 nl80211_mlme_mcgrp.id, gfp);
7721         return;
7722
7723  nla_put_failure:
7724         genlmsg_cancel(msg, hdr);
7725         nlmsg_free(msg);
7726 }
7727
7728 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7729                                     struct ieee80211_channel *channel_before,
7730                                     struct ieee80211_channel *channel_after)
7731 {
7732         struct sk_buff *msg;
7733         void *hdr;
7734         struct nlattr *nl_freq;
7735
7736         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7737         if (!msg)
7738                 return;
7739
7740         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7741         if (!hdr) {
7742                 nlmsg_free(msg);
7743                 return;
7744         }
7745
7746         /*
7747          * Since we are applying the beacon hint to a wiphy we know its
7748          * wiphy_idx is valid
7749          */
7750         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7751                 goto nla_put_failure;
7752
7753         /* Before */
7754         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7755         if (!nl_freq)
7756                 goto nla_put_failure;
7757         if (nl80211_msg_put_channel(msg, channel_before))
7758                 goto nla_put_failure;
7759         nla_nest_end(msg, nl_freq);
7760
7761         /* After */
7762         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7763         if (!nl_freq)
7764                 goto nla_put_failure;
7765         if (nl80211_msg_put_channel(msg, channel_after))
7766                 goto nla_put_failure;
7767         nla_nest_end(msg, nl_freq);
7768
7769         genlmsg_end(msg, hdr);
7770
7771         rcu_read_lock();
7772         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7773                                 GFP_ATOMIC);
7774         rcu_read_unlock();
7775
7776         return;
7777
7778 nla_put_failure:
7779         genlmsg_cancel(msg, hdr);
7780         nlmsg_free(msg);
7781 }
7782
7783 static void nl80211_send_remain_on_chan_event(
7784         int cmd, struct cfg80211_registered_device *rdev,
7785         struct net_device *netdev, u64 cookie,
7786         struct ieee80211_channel *chan,
7787         enum nl80211_channel_type channel_type,
7788         unsigned int duration, gfp_t gfp)
7789 {
7790         struct sk_buff *msg;
7791         void *hdr;
7792
7793         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7794         if (!msg)
7795                 return;
7796
7797         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7798         if (!hdr) {
7799                 nlmsg_free(msg);
7800                 return;
7801         }
7802
7803         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7804             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7805             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7806             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7807             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7808                 goto nla_put_failure;
7809
7810         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7811             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7812                 goto nla_put_failure;
7813
7814         genlmsg_end(msg, hdr);
7815
7816         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7817                                 nl80211_mlme_mcgrp.id, gfp);
7818         return;
7819
7820  nla_put_failure:
7821         genlmsg_cancel(msg, hdr);
7822         nlmsg_free(msg);
7823 }
7824
7825 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7826                                     struct net_device *netdev, u64 cookie,
7827                                     struct ieee80211_channel *chan,
7828                                     enum nl80211_channel_type channel_type,
7829                                     unsigned int duration, gfp_t gfp)
7830 {
7831         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7832                                           rdev, netdev, cookie, chan,
7833                                           channel_type, duration, gfp);
7834 }
7835
7836 void nl80211_send_remain_on_channel_cancel(
7837         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7838         u64 cookie, struct ieee80211_channel *chan,
7839         enum nl80211_channel_type channel_type, gfp_t gfp)
7840 {
7841         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7842                                           rdev, netdev, cookie, chan,
7843                                           channel_type, 0, gfp);
7844 }
7845
7846 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7847                             struct net_device *dev, const u8 *mac_addr,
7848                             struct station_info *sinfo, gfp_t gfp)
7849 {
7850         struct sk_buff *msg;
7851
7852         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7853         if (!msg)
7854                 return;
7855
7856         if (nl80211_send_station(msg, 0, 0, 0,
7857                                  rdev, dev, mac_addr, sinfo) < 0) {
7858                 nlmsg_free(msg);
7859                 return;
7860         }
7861
7862         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7863                                 nl80211_mlme_mcgrp.id, gfp);
7864 }
7865
7866 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7867                                 struct net_device *dev, const u8 *mac_addr,
7868                                 gfp_t gfp)
7869 {
7870         struct sk_buff *msg;
7871         void *hdr;
7872
7873         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7874         if (!msg)
7875                 return;
7876
7877         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7878         if (!hdr) {
7879                 nlmsg_free(msg);
7880                 return;
7881         }
7882
7883         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7884             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
7885                 goto nla_put_failure;
7886
7887         genlmsg_end(msg, hdr);
7888
7889         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7890                                 nl80211_mlme_mcgrp.id, gfp);
7891         return;
7892
7893  nla_put_failure:
7894         genlmsg_cancel(msg, hdr);
7895         nlmsg_free(msg);
7896 }
7897
7898 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7899                                        const u8 *addr, gfp_t gfp)
7900 {
7901         struct wireless_dev *wdev = dev->ieee80211_ptr;
7902         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7903         struct sk_buff *msg;
7904         void *hdr;
7905         int err;
7906         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7907
7908         if (!nlpid)
7909                 return false;
7910
7911         msg = nlmsg_new(100, gfp);
7912         if (!msg)
7913                 return true;
7914
7915         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7916         if (!hdr) {
7917                 nlmsg_free(msg);
7918                 return true;
7919         }
7920
7921         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7922             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
7923             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7924                 goto nla_put_failure;
7925
7926         err = genlmsg_end(msg, hdr);
7927         if (err < 0) {
7928                 nlmsg_free(msg);
7929                 return true;
7930         }
7931
7932         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7933         return true;
7934
7935  nla_put_failure:
7936         genlmsg_cancel(msg, hdr);
7937         nlmsg_free(msg);
7938         return true;
7939 }
7940
7941 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7942 {
7943         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7944                                           addr, gfp);
7945 }
7946
7947 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7948                                     const u8 *addr, gfp_t gfp)
7949 {
7950         return __nl80211_unexpected_frame(dev,
7951                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7952                                           addr, gfp);
7953 }
7954
7955 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7956                       struct net_device *netdev, u32 nlpid,
7957                       int freq, int sig_dbm,
7958                       const u8 *buf, size_t len, gfp_t gfp)
7959 {
7960         struct sk_buff *msg;
7961         void *hdr;
7962
7963         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7964         if (!msg)
7965                 return -ENOMEM;
7966
7967         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7968         if (!hdr) {
7969                 nlmsg_free(msg);
7970                 return -ENOMEM;
7971         }
7972
7973         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7974             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7975             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
7976             (sig_dbm &&
7977              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
7978             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7979                 goto nla_put_failure;
7980
7981         genlmsg_end(msg, hdr);
7982
7983         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7984
7985  nla_put_failure:
7986         genlmsg_cancel(msg, hdr);
7987         nlmsg_free(msg);
7988         return -ENOBUFS;
7989 }
7990
7991 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7992                                  struct net_device *netdev, u64 cookie,
7993                                  const u8 *buf, size_t len, bool ack,
7994                                  gfp_t gfp)
7995 {
7996         struct sk_buff *msg;
7997         void *hdr;
7998
7999         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8000         if (!msg)
8001                 return;
8002
8003         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8004         if (!hdr) {
8005                 nlmsg_free(msg);
8006                 return;
8007         }
8008
8009         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8010             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8011             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8012             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8013             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8014                 goto nla_put_failure;
8015
8016         genlmsg_end(msg, hdr);
8017
8018         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8019         return;
8020
8021  nla_put_failure:
8022         genlmsg_cancel(msg, hdr);
8023         nlmsg_free(msg);
8024 }
8025
8026 void
8027 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8028                              struct net_device *netdev,
8029                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8030                              gfp_t gfp)
8031 {
8032         struct sk_buff *msg;
8033         struct nlattr *pinfoattr;
8034         void *hdr;
8035
8036         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8037         if (!msg)
8038                 return;
8039
8040         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8041         if (!hdr) {
8042                 nlmsg_free(msg);
8043                 return;
8044         }
8045
8046         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8047             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8048                 goto nla_put_failure;
8049
8050         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8051         if (!pinfoattr)
8052                 goto nla_put_failure;
8053
8054         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8055                         rssi_event))
8056                 goto nla_put_failure;
8057
8058         nla_nest_end(msg, pinfoattr);
8059
8060         genlmsg_end(msg, hdr);
8061
8062         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8063                                 nl80211_mlme_mcgrp.id, gfp);
8064         return;
8065
8066  nla_put_failure:
8067         genlmsg_cancel(msg, hdr);
8068         nlmsg_free(msg);
8069 }
8070
8071 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8072                               struct net_device *netdev, const u8 *bssid,
8073                               const u8 *replay_ctr, gfp_t gfp)
8074 {
8075         struct sk_buff *msg;
8076         struct nlattr *rekey_attr;
8077         void *hdr;
8078
8079         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8080         if (!msg)
8081                 return;
8082
8083         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8084         if (!hdr) {
8085                 nlmsg_free(msg);
8086                 return;
8087         }
8088
8089         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8090             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8091             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8092                 goto nla_put_failure;
8093
8094         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8095         if (!rekey_attr)
8096                 goto nla_put_failure;
8097
8098         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8099                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8100                 goto nla_put_failure;
8101
8102         nla_nest_end(msg, rekey_attr);
8103
8104         genlmsg_end(msg, hdr);
8105
8106         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8107                                 nl80211_mlme_mcgrp.id, gfp);
8108         return;
8109
8110  nla_put_failure:
8111         genlmsg_cancel(msg, hdr);
8112         nlmsg_free(msg);
8113 }
8114
8115 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8116                                     struct net_device *netdev, int index,
8117                                     const u8 *bssid, bool preauth, gfp_t gfp)
8118 {
8119         struct sk_buff *msg;
8120         struct nlattr *attr;
8121         void *hdr;
8122
8123         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8124         if (!msg)
8125                 return;
8126
8127         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8128         if (!hdr) {
8129                 nlmsg_free(msg);
8130                 return;
8131         }
8132
8133         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8134             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8135                 goto nla_put_failure;
8136
8137         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8138         if (!attr)
8139                 goto nla_put_failure;
8140
8141         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8142             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8143             (preauth &&
8144              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8145                 goto nla_put_failure;
8146
8147         nla_nest_end(msg, attr);
8148
8149         genlmsg_end(msg, hdr);
8150
8151         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8152                                 nl80211_mlme_mcgrp.id, gfp);
8153         return;
8154
8155  nla_put_failure:
8156         genlmsg_cancel(msg, hdr);
8157         nlmsg_free(msg);
8158 }
8159
8160 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8161                               struct net_device *netdev, int freq,
8162                               enum nl80211_channel_type type, gfp_t gfp)
8163 {
8164         struct sk_buff *msg;
8165         void *hdr;
8166
8167         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8168         if (!msg)
8169                 return;
8170
8171         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8172         if (!hdr) {
8173                 nlmsg_free(msg);
8174                 return;
8175         }
8176
8177         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8178             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8179             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8180                 goto nla_put_failure;
8181
8182         genlmsg_end(msg, hdr);
8183
8184         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8185                                 nl80211_mlme_mcgrp.id, gfp);
8186         return;
8187
8188  nla_put_failure:
8189         genlmsg_cancel(msg, hdr);
8190         nlmsg_free(msg);
8191 }
8192
8193 void
8194 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8195                                 struct net_device *netdev, const u8 *peer,
8196                                 u32 num_packets, gfp_t gfp)
8197 {
8198         struct sk_buff *msg;
8199         struct nlattr *pinfoattr;
8200         void *hdr;
8201
8202         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8203         if (!msg)
8204                 return;
8205
8206         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8207         if (!hdr) {
8208                 nlmsg_free(msg);
8209                 return;
8210         }
8211
8212         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8213             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8214             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8215                 goto nla_put_failure;
8216
8217         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8218         if (!pinfoattr)
8219                 goto nla_put_failure;
8220
8221         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8222                 goto nla_put_failure;
8223
8224         nla_nest_end(msg, pinfoattr);
8225
8226         genlmsg_end(msg, hdr);
8227
8228         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8229                                 nl80211_mlme_mcgrp.id, gfp);
8230         return;
8231
8232  nla_put_failure:
8233         genlmsg_cancel(msg, hdr);
8234         nlmsg_free(msg);
8235 }
8236
8237 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8238                            u64 cookie, bool acked, gfp_t gfp)
8239 {
8240         struct wireless_dev *wdev = dev->ieee80211_ptr;
8241         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8242         struct sk_buff *msg;
8243         void *hdr;
8244         int err;
8245
8246         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8247         if (!msg)
8248                 return;
8249
8250         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8251         if (!hdr) {
8252                 nlmsg_free(msg);
8253                 return;
8254         }
8255
8256         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8257             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8258             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8259             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8260             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8261                 goto nla_put_failure;
8262
8263         err = genlmsg_end(msg, hdr);
8264         if (err < 0) {
8265                 nlmsg_free(msg);
8266                 return;
8267         }
8268
8269         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8270                                 nl80211_mlme_mcgrp.id, gfp);
8271         return;
8272
8273  nla_put_failure:
8274         genlmsg_cancel(msg, hdr);
8275         nlmsg_free(msg);
8276 }
8277 EXPORT_SYMBOL(cfg80211_probe_status);
8278
8279 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8280                                  const u8 *frame, size_t len,
8281                                  int freq, int sig_dbm, gfp_t gfp)
8282 {
8283         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8284         struct sk_buff *msg;
8285         void *hdr;
8286         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8287
8288         if (!nlpid)
8289                 return;
8290
8291         msg = nlmsg_new(len + 100, gfp);
8292         if (!msg)
8293                 return;
8294
8295         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8296         if (!hdr) {
8297                 nlmsg_free(msg);
8298                 return;
8299         }
8300
8301         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8302             (freq &&
8303              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8304             (sig_dbm &&
8305              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8306             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8307                 goto nla_put_failure;
8308
8309         genlmsg_end(msg, hdr);
8310
8311         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8312         return;
8313
8314  nla_put_failure:
8315         genlmsg_cancel(msg, hdr);
8316         nlmsg_free(msg);
8317 }
8318 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8319
8320 static int nl80211_netlink_notify(struct notifier_block * nb,
8321                                   unsigned long state,
8322                                   void *_notify)
8323 {
8324         struct netlink_notify *notify = _notify;
8325         struct cfg80211_registered_device *rdev;
8326         struct wireless_dev *wdev;
8327
8328         if (state != NETLINK_URELEASE)
8329                 return NOTIFY_DONE;
8330
8331         rcu_read_lock();
8332
8333         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8334                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8335                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8336                 if (rdev->ap_beacons_nlpid == notify->pid)
8337                         rdev->ap_beacons_nlpid = 0;
8338         }
8339
8340         rcu_read_unlock();
8341
8342         return NOTIFY_DONE;
8343 }
8344
8345 static struct notifier_block nl80211_netlink_notifier = {
8346         .notifier_call = nl80211_netlink_notify,
8347 };
8348
8349 /* initialisation/exit functions */
8350
8351 int nl80211_init(void)
8352 {
8353         int err;
8354
8355         err = genl_register_family_with_ops(&nl80211_fam,
8356                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8357         if (err)
8358                 return err;
8359
8360         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8361         if (err)
8362                 goto err_out;
8363
8364         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8365         if (err)
8366                 goto err_out;
8367
8368         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8369         if (err)
8370                 goto err_out;
8371
8372         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8373         if (err)
8374                 goto err_out;
8375
8376 #ifdef CONFIG_NL80211_TESTMODE
8377         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8378         if (err)
8379                 goto err_out;
8380 #endif
8381
8382         err = netlink_register_notifier(&nl80211_netlink_notifier);
8383         if (err)
8384                 goto err_out;
8385
8386         return 0;
8387  err_out:
8388         genl_unregister_family(&nl80211_fam);
8389         return err;
8390 }
8391
8392 void nl80211_exit(void)
8393 {
8394         netlink_unregister_notifier(&nl80211_netlink_notifier);
8395         genl_unregister_family(&nl80211_fam);
8396 }