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         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 360                     chan->center_freq);
 361
 362         if (chan->flags & IEEE80211_CHAN_DISABLED)
 363                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 364         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 365                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 366         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 367                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 368         if (chan->flags & IEEE80211_CHAN_RADAR)
 369                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 370
 371         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 372                     DBM_TO_MBM(chan->max_power));
 373
 374         return 0;
 375
 376  nla_put_failure:
 377         return -ENOBUFS;
 378 }
 379
 380 /* netlink command implementations */
 381
 382 struct key_parse {
 383         struct key_params p;
 384         int idx;
 385         int type;
 386         bool def, defmgmt;
 387         bool def_uni, def_multi;
 388 };
 389
 390 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 391 {
 392         struct nlattr *tb[NL80211_KEY_MAX + 1];
 393         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 394                                    nl80211_key_policy);
 395         if (err)
 396                 return err;
 397
 398         k->def = !!tb[NL80211_KEY_DEFAULT];
 399         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 400
 401         if (k->def) {
 402                 k->def_uni = true;
 403                 k->def_multi = true;
 404         }
 405         if (k->defmgmt)
 406                 k->def_multi = true;
 407
 408         if (tb[NL80211_KEY_IDX])
 409                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 410
 411         if (tb[NL80211_KEY_DATA]) {
 412                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 413                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 414         }
 415
 416         if (tb[NL80211_KEY_SEQ]) {
 417                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 418                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 419         }
 420
 421         if (tb[NL80211_KEY_CIPHER])
 422                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 423
 424         if (tb[NL80211_KEY_TYPE]) {
 425                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 426                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 427                         return -EINVAL;
 428         }
 429
 430         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 431                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 432                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 433                                        tb[NL80211_KEY_DEFAULT_TYPES],
 434                                        nl80211_key_default_policy);
 435                 if (err)
 436                         return err;
 437
 438                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 439                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 446 {
 447         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 448                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 449                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 450         }
 451
 452         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 453                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 454                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 455         }
 456
 457         if (info->attrs[NL80211_ATTR_KEY_IDX])
 458                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 459
 460         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 461                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 462
 463         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 464         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 465
 466         if (k->def) {
 467                 k->def_uni = true;
 468                 k->def_multi = true;
 469         }
 470         if (k->defmgmt)
 471                 k->def_multi = true;
 472
 473         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 474                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 475                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 476                         return -EINVAL;
 477         }
 478
 479         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 480                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 481                 int err = nla_parse_nested(
 482                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 483                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 484                                 nl80211_key_default_policy);
 485                 if (err)
 486                         return err;
 487
 488                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 489                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 490         }
 491
 492         return 0;
 493 }
 494
 495 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 496 {
 497         int err;
 498
 499         memset(k, 0, sizeof(*k));
 500         k->idx = -1;
 501         k->type = -1;
 502
 503         if (info->attrs[NL80211_ATTR_KEY])
 504                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 505         else
 506                 err = nl80211_parse_key_old(info, k);
 507
 508         if (err)
 509                 return err;
 510
 511         if (k->def && k->defmgmt)
 512                 return -EINVAL;
 513
 514         if (k->defmgmt) {
 515                 if (k->def_uni || !k->def_multi)
 516                         return -EINVAL;
 517         }
 518
 519         if (k->idx != -1) {
 520                 if (k->defmgmt) {
 521                         if (k->idx < 4 || k->idx > 5)
 522                                 return -EINVAL;
 523                 } else if (k->def) {
 524                         if (k->idx < 0 || k->idx > 3)
 525                                 return -EINVAL;
 526                 } else {
 527                         if (k->idx < 0 || k->idx > 5)
 528                                 return -EINVAL;
 529                 }
 530         }
 531
 532         return 0;
 533 }
 534
 535 static struct cfg80211_cached_keys *
 536 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 537                        struct nlattr *keys)
 538 {
 539         struct key_parse parse;
 540         struct nlattr *key;
 541         struct cfg80211_cached_keys *result;
 542         int rem, err, def = 0;
 543
 544         result = kzalloc(sizeof(*result), GFP_KERNEL);
 545         if (!result)
 546                 return ERR_PTR(-ENOMEM);
 547
 548         result->def = -1;
 549         result->defmgmt = -1;
 550
 551         nla_for_each_nested(key, keys, rem) {
 552                 memset(&parse, 0, sizeof(parse));
 553                 parse.idx = -1;
 554
 555                 err = nl80211_parse_key_new(key, &parse);
 556                 if (err)
 557                         goto error;
 558                 err = -EINVAL;
 559                 if (!parse.p.key)
 560                         goto error;
 561                 if (parse.idx < 0 || parse.idx > 4)
 562                         goto error;
 563                 if (parse.def) {
 564                         if (def)
 565                                 goto error;
 566                         def = 1;
 567                         result->def = parse.idx;
 568                         if (!parse.def_uni || !parse.def_multi)
 569                                 goto error;
 570                 } else if (parse.defmgmt)
 571                         goto error;
 572                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 573                                                      parse.idx, false, NULL);
 574                 if (err)
 575                         goto error;
 576                 result->params[parse.idx].cipher = parse.p.cipher;
 577                 result->params[parse.idx].key_len = parse.p.key_len;
 578                 result->params[parse.idx].key = result->data[parse.idx];
 579                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 580         }
 581
 582         return result;
 583  error:
 584         kfree(result);
 585         return ERR_PTR(err);
 586 }
 587
 588 static int nl80211_key_allowed(struct wireless_dev *wdev)
 589 {
 590         ASSERT_WDEV_LOCK(wdev);
 591
 592         switch (wdev->iftype) {
 593         case NL80211_IFTYPE_AP:
 594         case NL80211_IFTYPE_AP_VLAN:
 595         case NL80211_IFTYPE_P2P_GO:
 596         case NL80211_IFTYPE_MESH_POINT:
 597                 break;
 598         case NL80211_IFTYPE_ADHOC:
 599                 if (!wdev->current_bss)
 600                         return -ENOLINK;
 601                 break;
 602         case NL80211_IFTYPE_STATION:
 603         case NL80211_IFTYPE_P2P_CLIENT:
 604                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 605                         return -ENOLINK;
 606                 break;
 607         default:
 608                 return -EINVAL;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 615 {
 616         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 617         int i;
 618
 619         if (!nl_modes)
 620                 goto nla_put_failure;
 621
 622         i = 0;
 623         while (ifmodes) {
 624                 if (ifmodes & 1)
 625                         NLA_PUT_FLAG(msg, i);
 626                 ifmodes >>= 1;
 627                 i++;
 628         }
 629
 630         nla_nest_end(msg, nl_modes);
 631         return 0;
 632
 633 nla_put_failure:
 634         return -ENOBUFS;
 635 }
 636
 637 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 638                                           struct sk_buff *msg)
 639 {
 640         struct nlattr *nl_combis;
 641         int i, j;
 642
 643         nl_combis = nla_nest_start(msg,
 644                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 645         if (!nl_combis)
 646                 goto nla_put_failure;
 647
 648         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 649                 const struct ieee80211_iface_combination *c;
 650                 struct nlattr *nl_combi, *nl_limits;
 651
 652                 c = &wiphy->iface_combinations[i];
 653
 654                 nl_combi = nla_nest_start(msg, i + 1);
 655                 if (!nl_combi)
 656                         goto nla_put_failure;
 657
 658                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 659                 if (!nl_limits)
 660                         goto nla_put_failure;
 661
 662                 for (j = 0; j < c->n_limits; j++) {
 663                         struct nlattr *nl_limit;
 664
 665                         nl_limit = nla_nest_start(msg, j + 1);
 666                         if (!nl_limit)
 667                                 goto nla_put_failure;
 668                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 669                                     c->limits[j].max);
 670                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 671                                                 c->limits[j].types))
 672                                 goto nla_put_failure;
 673                         nla_nest_end(msg, nl_limit);
 674                 }
 675
 676                 nla_nest_end(msg, nl_limits);
 677
 678                 if (c->beacon_int_infra_match)
 679                         NLA_PUT_FLAG(msg,
 680                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 681                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 682                             c->num_different_channels);
 683                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 684                             c->max_interfaces);
 685
 686                 nla_nest_end(msg, nl_combi);
 687         }
 688
 689         nla_nest_end(msg, nl_combis);
 690
 691         return 0;
 692 nla_put_failure:
 693         return -ENOBUFS;
 694 }
 695
 696 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 697                               struct cfg80211_registered_device *dev)
 698 {
 699         void *hdr;
 700         struct nlattr *nl_bands, *nl_band;
 701         struct nlattr *nl_freqs, *nl_freq;
 702         struct nlattr *nl_rates, *nl_rate;
 703         struct nlattr *nl_cmds;
 704         enum ieee80211_band band;
 705         struct ieee80211_channel *chan;
 706         struct ieee80211_rate *rate;
 707         int i;
 708         const struct ieee80211_txrx_stypes *mgmt_stypes =
 709                                 dev->wiphy.mgmt_stypes;
 710
 711         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 712         if (!hdr)
 713                 return -1;
 714
 715         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 716         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 717
 718         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 719                     cfg80211_rdev_list_generation);
 720
 721         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 722                    dev->wiphy.retry_short);
 723         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 724                    dev->wiphy.retry_long);
 725         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 726                     dev->wiphy.frag_threshold);
 727         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 728                     dev->wiphy.rts_threshold);
 729         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 730                     dev->wiphy.coverage_class);
 731         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 732                    dev->wiphy.max_scan_ssids);
 733         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 734                    dev->wiphy.max_sched_scan_ssids);
 735         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 736                     dev->wiphy.max_scan_ie_len);
 737         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 738                     dev->wiphy.max_sched_scan_ie_len);
 739         NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 740                    dev->wiphy.max_match_sets);
 741
 742         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 743                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 744         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 745                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 746         if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
 747                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
 748         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 749                 NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
 750         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
 751                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
 752         if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
 753                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
 754
 755         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 756                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 757                 dev->wiphy.cipher_suites);
 758
 759         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 760                    dev->wiphy.max_num_pmkids);
 761
 762         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 763                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 764
 765         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 766                     dev->wiphy.available_antennas_tx);
 767         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 768                     dev->wiphy.available_antennas_rx);
 769
 770         if (dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD)
 771                 NLA_PUT_U32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 772                             dev->wiphy.probe_resp_offload);
 773
 774         if ((dev->wiphy.available_antennas_tx ||
 775              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 776                 u32 tx_ant = 0, rx_ant = 0;
 777                 int res;
 778                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 779                 if (!res) {
 780                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 781                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 782                 }
 783         }
 784
 785         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 786                                 dev->wiphy.interface_modes))
 787                 goto nla_put_failure;
 788
 789         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 790         if (!nl_bands)
 791                 goto nla_put_failure;
 792
 793         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 794                 if (!dev->wiphy.bands[band])
 795                         continue;
 796
 797                 nl_band = nla_nest_start(msg, band);
 798                 if (!nl_band)
 799                         goto nla_put_failure;
 800
 801                 /* add HT info */
 802                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 803                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 804                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 805                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 806                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 807                                 dev->wiphy.bands[band]->ht_cap.cap);
 808                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 809                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 810                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 811                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 812                 }
 813
 814                 /* add frequencies */
 815                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 816                 if (!nl_freqs)
 817                         goto nla_put_failure;
 818
 819                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 820                         nl_freq = nla_nest_start(msg, i);
 821                         if (!nl_freq)
 822                                 goto nla_put_failure;
 823
 824                         chan = &dev->wiphy.bands[band]->channels[i];
 825
 826                         if (nl80211_msg_put_channel(msg, chan))
 827                                 goto nla_put_failure;
 828
 829                         nla_nest_end(msg, nl_freq);
 830                 }
 831
 832                 nla_nest_end(msg, nl_freqs);
 833
 834                 /* add bitrates */
 835                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 836                 if (!nl_rates)
 837                         goto nla_put_failure;
 838
 839                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 840                         nl_rate = nla_nest_start(msg, i);
 841                         if (!nl_rate)
 842                                 goto nla_put_failure;
 843
 844                         rate = &dev->wiphy.bands[band]->bitrates[i];
 845                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 846                                     rate->bitrate);
 847                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 848                                 NLA_PUT_FLAG(msg,
 849                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 850
 851                         nla_nest_end(msg, nl_rate);
 852                 }
 853
 854                 nla_nest_end(msg, nl_rates);
 855
 856                 nla_nest_end(msg, nl_band);
 857         }
 858         nla_nest_end(msg, nl_bands);
 859
 860         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 861         if (!nl_cmds)
 862                 goto nla_put_failure;
 863
 864         i = 0;
 865 #define CMD(op, n)                                              \
 866          do {                                                   \
 867                 if (dev->ops->op) {                             \
 868                         i++;                                    \
 869                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 870                 }                                               \
 871         } while (0)
 872
 873         CMD(add_virtual_intf, NEW_INTERFACE);
 874         CMD(change_virtual_intf, SET_INTERFACE);
 875         CMD(add_key, NEW_KEY);
 876         CMD(start_ap, START_AP);
 877         CMD(add_station, NEW_STATION);
 878         CMD(add_mpath, NEW_MPATH);
 879         CMD(update_mesh_config, SET_MESH_CONFIG);
 880         CMD(change_bss, SET_BSS);
 881         CMD(auth, AUTHENTICATE);
 882         CMD(assoc, ASSOCIATE);
 883         CMD(deauth, DEAUTHENTICATE);
 884         CMD(disassoc, DISASSOCIATE);
 885         CMD(join_ibss, JOIN_IBSS);
 886         CMD(join_mesh, JOIN_MESH);
 887         CMD(set_pmksa, SET_PMKSA);
 888         CMD(del_pmksa, DEL_PMKSA);
 889         CMD(flush_pmksa, FLUSH_PMKSA);
 890         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 891                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 892         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 893         CMD(mgmt_tx, FRAME);
 894         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 895         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 896                 i++;
 897                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 898         }
 899         CMD(set_channel, SET_CHANNEL);
 900         CMD(set_wds_peer, SET_WDS_PEER);
 901         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 902                 CMD(tdls_mgmt, TDLS_MGMT);
 903                 CMD(tdls_oper, TDLS_OPER);
 904         }
 905         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 906                 CMD(sched_scan_start, START_SCHED_SCAN);
 907         CMD(probe_client, PROBE_CLIENT);
 908         CMD(set_noack_map, SET_NOACK_MAP);
 909         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 910                 i++;
 911                 NLA_PUT_U32(msg, i, NL80211_CMD_REGISTER_BEACONS);
 912         }
 913
 914 #ifdef CONFIG_NL80211_TESTMODE
 915         CMD(testmode_cmd, TESTMODE);
 916 #endif
 917
 918 #undef CMD
 919
 920         if (dev->ops->connect || dev->ops->auth) {
 921                 i++;
 922                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 923         }
 924
 925         if (dev->ops->disconnect || dev->ops->deauth) {
 926                 i++;
 927                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 928         }
 929
 930         nla_nest_end(msg, nl_cmds);
 931
 932         if (dev->ops->remain_on_channel &&
 933             dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 934                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 935                             dev->wiphy.max_remain_on_channel_duration);
 936
 937         if (dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX)
 938                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 939
 940         if (mgmt_stypes) {
 941                 u16 stypes;
 942                 struct nlattr *nl_ftypes, *nl_ifs;
 943                 enum nl80211_iftype ift;
 944
 945                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 946                 if (!nl_ifs)
 947                         goto nla_put_failure;
 948
 949                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 950                         nl_ftypes = nla_nest_start(msg, ift);
 951                         if (!nl_ftypes)
 952                                 goto nla_put_failure;
 953                         i = 0;
 954                         stypes = mgmt_stypes[ift].tx;
 955                         while (stypes) {
 956                                 if (stypes & 1)
 957                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 958                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 959                                 stypes >>= 1;
 960                                 i++;
 961                         }
 962                         nla_nest_end(msg, nl_ftypes);
 963                 }
 964
 965                 nla_nest_end(msg, nl_ifs);
 966
 967                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 968                 if (!nl_ifs)
 969                         goto nla_put_failure;
 970
 971                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 972                         nl_ftypes = nla_nest_start(msg, ift);
 973                         if (!nl_ftypes)
 974                                 goto nla_put_failure;
 975                         i = 0;
 976                         stypes = mgmt_stypes[ift].rx;
 977                         while (stypes) {
 978                                 if (stypes & 1)
 979                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 980                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 981                                 stypes >>= 1;
 982                                 i++;
 983                         }
 984                         nla_nest_end(msg, nl_ftypes);
 985                 }
 986                 nla_nest_end(msg, nl_ifs);
 987         }
 988
 989         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 990                 struct nlattr *nl_wowlan;
 991
 992                 nl_wowlan = nla_nest_start(msg,
 993                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 994                 if (!nl_wowlan)
 995                         goto nla_put_failure;
 996
 997                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 998                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 999                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
1000                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
1001                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
1002                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
1003                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
1004                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
1005                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
1006                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
1007                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
1008                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
1009                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
1010                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
1011                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
1012                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
1013                 if (dev->wiphy.wowlan.n_patterns) {
1014                         struct nl80211_wowlan_pattern_support pat = {
1015                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1016                                 .min_pattern_len =
1017                                         dev->wiphy.wowlan.pattern_min_len,
1018                                 .max_pattern_len =
1019                                         dev->wiphy.wowlan.pattern_max_len,
1020                         };
1021                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1022                                 sizeof(pat), &pat);
1023                 }
1024
1025                 nla_nest_end(msg, nl_wowlan);
1026         }
1027
1028         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1029                                 dev->wiphy.software_iftypes))
1030                 goto nla_put_failure;
1031
1032         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1033                 goto nla_put_failure;
1034
1035         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME)
1036                 NLA_PUT_U32(msg, NL80211_ATTR_DEVICE_AP_SME,
1037                             dev->wiphy.ap_sme_capa);
1038
1039         NLA_PUT_U32(msg, NL80211_ATTR_FEATURE_FLAGS, dev->wiphy.features);
1040
1041         if (dev->wiphy.ht_capa_mod_mask)
1042                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1043                         sizeof(*dev->wiphy.ht_capa_mod_mask),
1044                         dev->wiphy.ht_capa_mod_mask);
1045
1046         return genlmsg_end(msg, hdr);
1047
1048  nla_put_failure:
1049         genlmsg_cancel(msg, hdr);
1050         return -EMSGSIZE;
1051 }
1052
1053 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1054 {
1055         int idx = 0;
1056         int start = cb->args[0];
1057         struct cfg80211_registered_device *dev;
1058
1059         mutex_lock(&cfg80211_mutex);
1060         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1061                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1062                         continue;
1063                 if (++idx <= start)
1064                         continue;
1065                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1066                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1067                                        dev) < 0) {
1068                         idx--;
1069                         break;
1070                 }
1071         }
1072         mutex_unlock(&cfg80211_mutex);
1073
1074         cb->args[0] = idx;
1075
1076         return skb->len;
1077 }
1078
1079 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1080 {
1081         struct sk_buff *msg;
1082         struct cfg80211_registered_device *dev = info->user_ptr[0];
1083
1084         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1085         if (!msg)
1086                 return -ENOMEM;
1087
1088         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1089                 nlmsg_free(msg);
1090                 return -ENOBUFS;
1091         }
1092
1093         return genlmsg_reply(msg, info);
1094 }
1095
1096 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1097         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1098         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1099         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1100         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1101         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1102 };
1103
1104 static int parse_txq_params(struct nlattr *tb[],
1105                             struct ieee80211_txq_params *txq_params)
1106 {
1107         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1108             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1109             !tb[NL80211_TXQ_ATTR_AIFS])
1110                 return -EINVAL;
1111
1112         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1113         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1114         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1115         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1116         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1117
1118         return 0;
1119 }
1120
1121 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1122 {
1123         /*
1124          * You can only set the channel explicitly for AP, mesh
1125          * and WDS type interfaces; all others have their channel
1126          * managed via their respective "establish a connection"
1127          * command (connect, join, ...)
1128          *
1129          * Monitors are special as they are normally slaved to
1130          * whatever else is going on, so they behave as though
1131          * you tried setting the wiphy channel itself.
1132          */
1133         return !wdev ||
1134                 wdev->iftype == NL80211_IFTYPE_AP ||
1135                 wdev->iftype == NL80211_IFTYPE_WDS ||
1136                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1137                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1138                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1139 }
1140
1141 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1142                                  struct wireless_dev *wdev,
1143                                  struct genl_info *info)
1144 {
1145         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1146         u32 freq;
1147         int result;
1148
1149         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1150                 return -EINVAL;
1151
1152         if (!nl80211_can_set_dev_channel(wdev))
1153                 return -EOPNOTSUPP;
1154
1155         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1156                 channel_type = nla_get_u32(info->attrs[
1157                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1158                 if (channel_type != NL80211_CHAN_NO_HT &&
1159                     channel_type != NL80211_CHAN_HT20 &&
1160                     channel_type != NL80211_CHAN_HT40PLUS &&
1161                     channel_type != NL80211_CHAN_HT40MINUS)
1162                         return -EINVAL;
1163         }
1164
1165         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1166
1167         mutex_lock(&rdev->devlist_mtx);
1168         if (wdev) {
1169                 wdev_lock(wdev);
1170                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1171                 wdev_unlock(wdev);
1172         } else {
1173                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1174         }
1175         mutex_unlock(&rdev->devlist_mtx);
1176
1177         return result;
1178 }
1179
1180 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1181 {
1182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1183         struct net_device *netdev = info->user_ptr[1];
1184
1185         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1186 }
1187
1188 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1189 {
1190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1191         struct net_device *dev = info->user_ptr[1];
1192         struct wireless_dev *wdev = dev->ieee80211_ptr;
1193         const u8 *bssid;
1194
1195         if (!info->attrs[NL80211_ATTR_MAC])
1196                 return -EINVAL;
1197
1198         if (netif_running(dev))
1199                 return -EBUSY;
1200
1201         if (!rdev->ops->set_wds_peer)
1202                 return -EOPNOTSUPP;
1203
1204         if (wdev->iftype != NL80211_IFTYPE_WDS)
1205                 return -EOPNOTSUPP;
1206
1207         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1208         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1209 }
1210
1211
1212 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1213 {
1214         struct cfg80211_registered_device *rdev;
1215         struct net_device *netdev = NULL;
1216         struct wireless_dev *wdev;
1217         int result = 0, rem_txq_params = 0;
1218         struct nlattr *nl_txq_params;
1219         u32 changed;
1220         u8 retry_short = 0, retry_long = 0;
1221         u32 frag_threshold = 0, rts_threshold = 0;
1222         u8 coverage_class = 0;
1223
1224         /*
1225          * Try to find the wiphy and netdev. Normally this
1226          * function shouldn't need the netdev, but this is
1227          * done for backward compatibility -- previously
1228          * setting the channel was done per wiphy, but now
1229          * it is per netdev. Previous userland like hostapd
1230          * also passed a netdev to set_wiphy, so that it is
1231          * possible to let that go to the right netdev!
1232          */
1233         mutex_lock(&cfg80211_mutex);
1234
1235         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1236                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1237
1238                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1239                 if (netdev && netdev->ieee80211_ptr) {
1240                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1241                         mutex_lock(&rdev->mtx);
1242                 } else
1243                         netdev = NULL;
1244         }
1245
1246         if (!netdev) {
1247                 rdev = __cfg80211_rdev_from_info(info);
1248                 if (IS_ERR(rdev)) {
1249                         mutex_unlock(&cfg80211_mutex);
1250                         return PTR_ERR(rdev);
1251                 }
1252                 wdev = NULL;
1253                 netdev = NULL;
1254                 result = 0;
1255
1256                 mutex_lock(&rdev->mtx);
1257         } else if (netif_running(netdev) &&
1258                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1259                 wdev = netdev->ieee80211_ptr;
1260         else
1261                 wdev = NULL;
1262
1263         /*
1264          * end workaround code, by now the rdev is available
1265          * and locked, and wdev may or may not be NULL.
1266          */
1267
1268         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1269                 result = cfg80211_dev_rename(
1270                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1271
1272         mutex_unlock(&cfg80211_mutex);
1273
1274         if (result)
1275                 goto bad_res;
1276
1277         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1278                 struct ieee80211_txq_params txq_params;
1279                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1280
1281                 if (!rdev->ops->set_txq_params) {
1282                         result = -EOPNOTSUPP;
1283                         goto bad_res;
1284                 }
1285
1286                 if (!netdev) {
1287                         result = -EINVAL;
1288                         goto bad_res;
1289                 }
1290
1291                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1292                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1293                         result = -EINVAL;
1294                         goto bad_res;
1295                 }
1296
1297                 nla_for_each_nested(nl_txq_params,
1298                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1299                                     rem_txq_params) {
1300                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1301                                   nla_data(nl_txq_params),
1302                                   nla_len(nl_txq_params),
1303                                   txq_params_policy);
1304                         result = parse_txq_params(tb, &txq_params);
1305                         if (result)
1306                                 goto bad_res;
1307
1308                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1309                                                            netdev,
1310                                                            &txq_params);
1311                         if (result)
1312                                 goto bad_res;
1313                 }
1314         }
1315
1316         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1317                 result = __nl80211_set_channel(rdev, wdev, info);
1318                 if (result)
1319                         goto bad_res;
1320         }
1321
1322         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1323                 enum nl80211_tx_power_setting type;
1324                 int idx, mbm = 0;
1325
1326                 if (!rdev->ops->set_tx_power) {
1327                         result = -EOPNOTSUPP;
1328                         goto bad_res;
1329                 }
1330
1331                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1332                 type = nla_get_u32(info->attrs[idx]);
1333
1334                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1335                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1336                         result = -EINVAL;
1337                         goto bad_res;
1338                 }
1339
1340                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1341                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1342                         mbm = nla_get_u32(info->attrs[idx]);
1343                 }
1344
1345                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1346                 if (result)
1347                         goto bad_res;
1348         }
1349
1350         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1351             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1352                 u32 tx_ant, rx_ant;
1353                 if ((!rdev->wiphy.available_antennas_tx &&
1354                      !rdev->wiphy.available_antennas_rx) ||
1355                     !rdev->ops->set_antenna) {
1356                         result = -EOPNOTSUPP;
1357                         goto bad_res;
1358                 }
1359
1360                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1361                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1362
1363                 /* reject antenna configurations which don't match the
1364                  * available antenna masks, except for the "all" mask */
1365                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1366                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1367                         result = -EINVAL;
1368                         goto bad_res;
1369                 }
1370
1371                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1372                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1373
1374                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1375                 if (result)
1376                         goto bad_res;
1377         }
1378
1379         changed = 0;
1380
1381         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1382                 retry_short = nla_get_u8(
1383                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1384                 if (retry_short == 0) {
1385                         result = -EINVAL;
1386                         goto bad_res;
1387                 }
1388                 changed |= WIPHY_PARAM_RETRY_SHORT;
1389         }
1390
1391         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1392                 retry_long = nla_get_u8(
1393                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1394                 if (retry_long == 0) {
1395                         result = -EINVAL;
1396                         goto bad_res;
1397                 }
1398                 changed |= WIPHY_PARAM_RETRY_LONG;
1399         }
1400
1401         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1402                 frag_threshold = nla_get_u32(
1403                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1404                 if (frag_threshold < 256) {
1405                         result = -EINVAL;
1406                         goto bad_res;
1407                 }
1408                 if (frag_threshold != (u32) -1) {
1409                         /*
1410                          * Fragments (apart from the last one) are required to
1411                          * have even length. Make the fragmentation code
1412                          * simpler by stripping LSB should someone try to use
1413                          * odd threshold value.
1414                          */
1415                         frag_threshold &= ~0x1;
1416                 }
1417                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1418         }
1419
1420         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1421                 rts_threshold = nla_get_u32(
1422                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1423                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1424         }
1425
1426         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1427                 coverage_class = nla_get_u8(
1428                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1429                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1430         }
1431
1432         if (changed) {
1433                 u8 old_retry_short, old_retry_long;
1434                 u32 old_frag_threshold, old_rts_threshold;
1435                 u8 old_coverage_class;
1436
1437                 if (!rdev->ops->set_wiphy_params) {
1438                         result = -EOPNOTSUPP;
1439                         goto bad_res;
1440                 }
1441
1442                 old_retry_short = rdev->wiphy.retry_short;
1443                 old_retry_long = rdev->wiphy.retry_long;
1444                 old_frag_threshold = rdev->wiphy.frag_threshold;
1445                 old_rts_threshold = rdev->wiphy.rts_threshold;
1446                 old_coverage_class = rdev->wiphy.coverage_class;
1447
1448                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1449                         rdev->wiphy.retry_short = retry_short;
1450                 if (changed & WIPHY_PARAM_RETRY_LONG)
1451                         rdev->wiphy.retry_long = retry_long;
1452                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1453                         rdev->wiphy.frag_threshold = frag_threshold;
1454                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1455                         rdev->wiphy.rts_threshold = rts_threshold;
1456                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1457                         rdev->wiphy.coverage_class = coverage_class;
1458
1459                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1460                 if (result) {
1461                         rdev->wiphy.retry_short = old_retry_short;
1462                         rdev->wiphy.retry_long = old_retry_long;
1463                         rdev->wiphy.frag_threshold = old_frag_threshold;
1464                         rdev->wiphy.rts_threshold = old_rts_threshold;
1465                         rdev->wiphy.coverage_class = old_coverage_class;
1466                 }
1467         }
1468
1469  bad_res:
1470         mutex_unlock(&rdev->mtx);
1471         if (netdev)
1472                 dev_put(netdev);
1473         return result;
1474 }
1475
1476
1477 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1478                               struct cfg80211_registered_device *rdev,
1479                               struct net_device *dev)
1480 {
1481         void *hdr;
1482
1483         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1484         if (!hdr)
1485                 return -1;
1486
1487         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1488         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1489         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1490         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1491
1492         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1493                     rdev->devlist_generation ^
1494                         (cfg80211_rdev_list_generation << 2));
1495
1496         return genlmsg_end(msg, hdr);
1497
1498  nla_put_failure:
1499         genlmsg_cancel(msg, hdr);
1500         return -EMSGSIZE;
1501 }
1502
1503 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1504 {
1505         int wp_idx = 0;
1506         int if_idx = 0;
1507         int wp_start = cb->args[0];
1508         int if_start = cb->args[1];
1509         struct cfg80211_registered_device *rdev;
1510         struct wireless_dev *wdev;
1511
1512         mutex_lock(&cfg80211_mutex);
1513         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1514                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1515                         continue;
1516                 if (wp_idx < wp_start) {
1517                         wp_idx++;
1518                         continue;
1519                 }
1520                 if_idx = 0;
1521
1522                 mutex_lock(&rdev->devlist_mtx);
1523                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1524                         if (if_idx < if_start) {
1525                                 if_idx++;
1526                                 continue;
1527                         }
1528                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1529                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1530                                                rdev, wdev->netdev) < 0) {
1531                                 mutex_unlock(&rdev->devlist_mtx);
1532                                 goto out;
1533                         }
1534                         if_idx++;
1535                 }
1536                 mutex_unlock(&rdev->devlist_mtx);
1537
1538                 wp_idx++;
1539         }
1540  out:
1541         mutex_unlock(&cfg80211_mutex);
1542
1543         cb->args[0] = wp_idx;
1544         cb->args[1] = if_idx;
1545
1546         return skb->len;
1547 }
1548
1549 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1550 {
1551         struct sk_buff *msg;
1552         struct cfg80211_registered_device *dev = info->user_ptr[0];
1553         struct net_device *netdev = info->user_ptr[1];
1554
1555         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1556         if (!msg)
1557                 return -ENOMEM;
1558
1559         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1560                                dev, netdev) < 0) {
1561                 nlmsg_free(msg);
1562                 return -ENOBUFS;
1563         }
1564
1565         return genlmsg_reply(msg, info);
1566 }
1567
1568 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1569         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1570         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1571         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1572         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1573         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1574 };
1575
1576 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1577 {
1578         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1579         int flag;
1580
1581         *mntrflags = 0;
1582
1583         if (!nla)
1584                 return -EINVAL;
1585
1586         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1587                              nla, mntr_flags_policy))
1588                 return -EINVAL;
1589
1590         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1591                 if (flags[flag])
1592                         *mntrflags |= (1<<flag);
1593
1594         return 0;
1595 }
1596
1597 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1598                                struct net_device *netdev, u8 use_4addr,
1599                                enum nl80211_iftype iftype)
1600 {
1601         if (!use_4addr) {
1602                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1603                         return -EBUSY;
1604                 return 0;
1605         }
1606
1607         switch (iftype) {
1608         case NL80211_IFTYPE_AP_VLAN:
1609                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1610                         return 0;
1611                 break;
1612         case NL80211_IFTYPE_STATION:
1613                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1614                         return 0;
1615                 break;
1616         default:
1617                 break;
1618         }
1619
1620         return -EOPNOTSUPP;
1621 }
1622
1623 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1624 {
1625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1626         struct vif_params params;
1627         int err;
1628         enum nl80211_iftype otype, ntype;
1629         struct net_device *dev = info->user_ptr[1];
1630         u32 _flags, *flags = NULL;
1631         bool change = false;
1632
1633         memset(&params, 0, sizeof(params));
1634
1635         otype = ntype = dev->ieee80211_ptr->iftype;
1636
1637         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1638                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1639                 if (otype != ntype)
1640                         change = true;
1641                 if (ntype > NL80211_IFTYPE_MAX)
1642                         return -EINVAL;
1643         }
1644
1645         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1646                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1647
1648                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1649                         return -EINVAL;
1650                 if (netif_running(dev))
1651                         return -EBUSY;
1652
1653                 wdev_lock(wdev);
1654                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1655                              IEEE80211_MAX_MESH_ID_LEN);
1656                 wdev->mesh_id_up_len =
1657                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1658                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1659                        wdev->mesh_id_up_len);
1660                 wdev_unlock(wdev);
1661         }
1662
1663         if (info->attrs[NL80211_ATTR_4ADDR]) {
1664                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1665                 change = true;
1666                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1667                 if (err)
1668                         return err;
1669         } else {
1670                 params.use_4addr = -1;
1671         }
1672
1673         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1674                 if (ntype != NL80211_IFTYPE_MONITOR)
1675                         return -EINVAL;
1676                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1677                                           &_flags);
1678                 if (err)
1679                         return err;
1680
1681                 flags = &_flags;
1682                 change = true;
1683         }
1684
1685         if (change)
1686                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1687         else
1688                 err = 0;
1689
1690         if (!err && params.use_4addr != -1)
1691                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1692
1693         return err;
1694 }
1695
1696 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1697 {
1698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1699         struct vif_params params;
1700         struct net_device *dev;
1701         int err;
1702         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1703         u32 flags;
1704
1705         memset(&params, 0, sizeof(params));
1706
1707         if (!info->attrs[NL80211_ATTR_IFNAME])
1708                 return -EINVAL;
1709
1710         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1711                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1712                 if (type > NL80211_IFTYPE_MAX)
1713                         return -EINVAL;
1714         }
1715
1716         if (!rdev->ops->add_virtual_intf ||
1717             !(rdev->wiphy.interface_modes & (1 << type)))
1718                 return -EOPNOTSUPP;
1719
1720         if (info->attrs[NL80211_ATTR_4ADDR]) {
1721                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1722                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1723                 if (err)
1724                         return err;
1725         }
1726
1727         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1728                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1729                                   &flags);
1730         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1731                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1732                 type, err ? NULL : &flags, &params);
1733         if (IS_ERR(dev))
1734                 return PTR_ERR(dev);
1735
1736         if (type == NL80211_IFTYPE_MESH_POINT &&
1737             info->attrs[NL80211_ATTR_MESH_ID]) {
1738                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1739
1740                 wdev_lock(wdev);
1741                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1742                              IEEE80211_MAX_MESH_ID_LEN);
1743                 wdev->mesh_id_up_len =
1744                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1745                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1746                        wdev->mesh_id_up_len);
1747                 wdev_unlock(wdev);
1748         }
1749
1750         return 0;
1751 }
1752
1753 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1754 {
1755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1756         struct net_device *dev = info->user_ptr[1];
1757
1758         if (!rdev->ops->del_virtual_intf)
1759                 return -EOPNOTSUPP;
1760
1761         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1762 }
1763
1764 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1765 {
1766         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1767         struct net_device *dev = info->user_ptr[1];
1768         u16 noack_map;
1769
1770         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1771                 return -EINVAL;
1772
1773         if (!rdev->ops->set_noack_map)
1774                 return -EOPNOTSUPP;
1775
1776         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1777
1778         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1779 }
1780
1781 struct get_key_cookie {
1782         struct sk_buff *msg;
1783         int error;
1784         int idx;
1785 };
1786
1787 static void get_key_callback(void *c, struct key_params *params)
1788 {
1789         struct nlattr *key;
1790         struct get_key_cookie *cookie = c;
1791
1792         if (params->key)
1793                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1794                         params->key_len, params->key);
1795
1796         if (params->seq)
1797                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1798                         params->seq_len, params->seq);
1799
1800         if (params->cipher)
1801                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1802                             params->cipher);
1803
1804         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1805         if (!key)
1806                 goto nla_put_failure;
1807
1808         if (params->key)
1809                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1810                         params->key_len, params->key);
1811
1812         if (params->seq)
1813                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1814                         params->seq_len, params->seq);
1815
1816         if (params->cipher)
1817                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1818                             params->cipher);
1819
1820         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1821
1822         nla_nest_end(cookie->msg, key);
1823
1824         return;
1825  nla_put_failure:
1826         cookie->error = 1;
1827 }
1828
1829 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1830 {
1831         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1832         int err;
1833         struct net_device *dev = info->user_ptr[1];
1834         u8 key_idx = 0;
1835         const u8 *mac_addr = NULL;
1836         bool pairwise;
1837         struct get_key_cookie cookie = {
1838                 .error = 0,
1839         };
1840         void *hdr;
1841         struct sk_buff *msg;
1842
1843         if (info->attrs[NL80211_ATTR_KEY_IDX])
1844                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1845
1846         if (key_idx > 5)
1847                 return -EINVAL;
1848
1849         if (info->attrs[NL80211_ATTR_MAC])
1850                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1851
1852         pairwise = !!mac_addr;
1853         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1854                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1855                 if (kt >= NUM_NL80211_KEYTYPES)
1856                         return -EINVAL;
1857                 if (kt != NL80211_KEYTYPE_GROUP &&
1858                     kt != NL80211_KEYTYPE_PAIRWISE)
1859                         return -EINVAL;
1860                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1861         }
1862
1863         if (!rdev->ops->get_key)
1864                 return -EOPNOTSUPP;
1865
1866         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1867         if (!msg)
1868                 return -ENOMEM;
1869
1870         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1871                              NL80211_CMD_NEW_KEY);
1872         if (IS_ERR(hdr))
1873                 return PTR_ERR(hdr);
1874
1875         cookie.msg = msg;
1876         cookie.idx = key_idx;
1877
1878         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1879         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1880         if (mac_addr)
1881                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1882
1883         if (pairwise && mac_addr &&
1884             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1885                 return -ENOENT;
1886
1887         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1888                                  mac_addr, &cookie, get_key_callback);
1889
1890         if (err)
1891                 goto free_msg;
1892
1893         if (cookie.error)
1894                 goto nla_put_failure;
1895
1896         genlmsg_end(msg, hdr);
1897         return genlmsg_reply(msg, info);
1898
1899  nla_put_failure:
1900         err = -ENOBUFS;
1901  free_msg:
1902         nlmsg_free(msg);
1903         return err;
1904 }
1905
1906 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1907 {
1908         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1909         struct key_parse key;
1910         int err;
1911         struct net_device *dev = info->user_ptr[1];
1912
1913         err = nl80211_parse_key(info, &key);
1914         if (err)
1915                 return err;
1916
1917         if (key.idx < 0)
1918                 return -EINVAL;
1919
1920         /* only support setting default key */
1921         if (!key.def && !key.defmgmt)
1922                 return -EINVAL;
1923
1924         wdev_lock(dev->ieee80211_ptr);
1925
1926         if (key.def) {
1927                 if (!rdev->ops->set_default_key) {
1928                         err = -EOPNOTSUPP;
1929                         goto out;
1930                 }
1931
1932                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1933                 if (err)
1934                         goto out;
1935
1936                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1937                                                  key.def_uni, key.def_multi);
1938
1939                 if (err)
1940                         goto out;
1941
1942 #ifdef CONFIG_CFG80211_WEXT
1943                 dev->ieee80211_ptr->wext.default_key = key.idx;
1944 #endif
1945         } else {
1946                 if (key.def_uni || !key.def_multi) {
1947                         err = -EINVAL;
1948                         goto out;
1949                 }
1950
1951                 if (!rdev->ops->set_default_mgmt_key) {
1952                         err = -EOPNOTSUPP;
1953                         goto out;
1954                 }
1955
1956                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1957                 if (err)
1958                         goto out;
1959
1960                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1961                                                       dev, key.idx);
1962                 if (err)
1963                         goto out;
1964
1965 #ifdef CONFIG_CFG80211_WEXT
1966                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1967 #endif
1968         }
1969
1970  out:
1971         wdev_unlock(dev->ieee80211_ptr);
1972
1973         return err;
1974 }
1975
1976 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1977 {
1978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1979         int err;
1980         struct net_device *dev = info->user_ptr[1];
1981         struct key_parse key;
1982         const u8 *mac_addr = NULL;
1983
1984         err = nl80211_parse_key(info, &key);
1985         if (err)
1986                 return err;
1987
1988         if (!key.p.key)
1989                 return -EINVAL;
1990
1991         if (info->attrs[NL80211_ATTR_MAC])
1992                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1993
1994         if (key.type == -1) {
1995                 if (mac_addr)
1996                         key.type = NL80211_KEYTYPE_PAIRWISE;
1997                 else
1998                         key.type = NL80211_KEYTYPE_GROUP;
1999         }
2000
2001         /* for now */
2002         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2003             key.type != NL80211_KEYTYPE_GROUP)
2004                 return -EINVAL;
2005
2006         if (!rdev->ops->add_key)
2007                 return -EOPNOTSUPP;
2008
2009         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2010                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2011                                            mac_addr))
2012                 return -EINVAL;
2013
2014         wdev_lock(dev->ieee80211_ptr);
2015         err = nl80211_key_allowed(dev->ieee80211_ptr);
2016         if (!err)
2017                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2018                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2019                                          mac_addr, &key.p);
2020         wdev_unlock(dev->ieee80211_ptr);
2021
2022         return err;
2023 }
2024
2025 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2026 {
2027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2028         int err;
2029         struct net_device *dev = info->user_ptr[1];
2030         u8 *mac_addr = NULL;
2031         struct key_parse key;
2032
2033         err = nl80211_parse_key(info, &key);
2034         if (err)
2035                 return err;
2036
2037         if (info->attrs[NL80211_ATTR_MAC])
2038                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2039
2040         if (key.type == -1) {
2041                 if (mac_addr)
2042                         key.type = NL80211_KEYTYPE_PAIRWISE;
2043                 else
2044                         key.type = NL80211_KEYTYPE_GROUP;
2045         }
2046
2047         /* for now */
2048         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2049             key.type != NL80211_KEYTYPE_GROUP)
2050                 return -EINVAL;
2051
2052         if (!rdev->ops->del_key)
2053                 return -EOPNOTSUPP;
2054
2055         wdev_lock(dev->ieee80211_ptr);
2056         err = nl80211_key_allowed(dev->ieee80211_ptr);
2057
2058         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2059             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2060                 err = -ENOENT;
2061
2062         if (!err)
2063                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2064                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2065                                          mac_addr);
2066
2067 #ifdef CONFIG_CFG80211_WEXT
2068         if (!err) {
2069                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2070                         dev->ieee80211_ptr->wext.default_key = -1;
2071                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2072                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2073         }
2074 #endif
2075         wdev_unlock(dev->ieee80211_ptr);
2076
2077         return err;
2078 }
2079
2080 static int nl80211_parse_beacon(struct genl_info *info,
2081                                 struct cfg80211_beacon_data *bcn)
2082 {
2083         bool haveinfo = false;
2084
2085         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2086             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2087             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2088             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2089                 return -EINVAL;
2090
2091         memset(bcn, 0, sizeof(*bcn));
2092
2093         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2094                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2095                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2096                 if (!bcn->head_len)
2097                         return -EINVAL;
2098                 haveinfo = true;
2099         }
2100
2101         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2102                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2103                 bcn->tail_len =
2104                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2105                 haveinfo = true;
2106         }
2107
2108         if (!haveinfo)
2109                 return -EINVAL;
2110
2111         if (info->attrs[NL80211_ATTR_IE]) {
2112                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2113                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2114         }
2115
2116         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2117                 bcn->proberesp_ies =
2118                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2119                 bcn->proberesp_ies_len =
2120                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2121         }
2122
2123         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2124                 bcn->assocresp_ies =
2125                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2126                 bcn->assocresp_ies_len =
2127                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2128         }
2129
2130         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2131                 bcn->probe_resp =
2132                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2133                 bcn->probe_resp_len =
2134                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2135         }
2136
2137         return 0;
2138 }
2139
2140 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2141 {
2142         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2143         struct net_device *dev = info->user_ptr[1];
2144         struct wireless_dev *wdev = dev->ieee80211_ptr;
2145         struct cfg80211_ap_settings params;
2146         int err;
2147
2148         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2149             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2150                 return -EOPNOTSUPP;
2151
2152         if (!rdev->ops->start_ap)
2153                 return -EOPNOTSUPP;
2154
2155         if (wdev->beacon_interval)
2156                 return -EALREADY;
2157
2158         memset(&params, 0, sizeof(params));
2159
2160         /* these are required for START_AP */
2161         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2162             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2163             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2164                 return -EINVAL;
2165
2166         err = nl80211_parse_beacon(info, &params.beacon);
2167         if (err)
2168                 return err;
2169
2170         params.beacon_interval =
2171                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2172         params.dtim_period =
2173                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2174
2175         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2176         if (err)
2177                 return err;
2178
2179         /*
2180          * In theory, some of these attributes should be required here
2181          * but since they were not used when the command was originally
2182          * added, keep them optional for old user space programs to let
2183          * them continue to work with drivers that do not need the
2184          * additional information -- drivers must check!
2185          */
2186         if (info->attrs[NL80211_ATTR_SSID]) {
2187                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2188                 params.ssid_len =
2189                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2190                 if (params.ssid_len == 0 ||
2191                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2192                         return -EINVAL;
2193         }
2194
2195         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2196                 params.hidden_ssid = nla_get_u32(
2197                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2198                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2199                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2200                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2201                         return -EINVAL;
2202         }
2203
2204         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2205
2206         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2207                 params.auth_type = nla_get_u32(
2208                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2209                 if (!nl80211_valid_auth_type(params.auth_type))
2210                         return -EINVAL;
2211         } else
2212                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2213
2214         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2215                                       NL80211_MAX_NR_CIPHER_SUITES);
2216         if (err)
2217                 return err;
2218
2219         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2220                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2221                         return -EOPNOTSUPP;
2222                 params.inactivity_timeout = nla_get_u16(
2223                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2224         }
2225
2226         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2227         if (!err)
2228                 wdev->beacon_interval = params.beacon_interval;
2229         return err;
2230 }
2231
2232 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2233 {
2234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2235         struct net_device *dev = info->user_ptr[1];
2236         struct wireless_dev *wdev = dev->ieee80211_ptr;
2237         struct cfg80211_beacon_data params;
2238         int err;
2239
2240         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2241             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2242                 return -EOPNOTSUPP;
2243
2244         if (!rdev->ops->change_beacon)
2245                 return -EOPNOTSUPP;
2246
2247         if (!wdev->beacon_interval)
2248                 return -EINVAL;
2249
2250         err = nl80211_parse_beacon(info, &params);
2251         if (err)
2252                 return err;
2253
2254         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2255 }
2256
2257 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2258 {
2259         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2260         struct net_device *dev = info->user_ptr[1];
2261         struct wireless_dev *wdev = dev->ieee80211_ptr;
2262         int err;
2263
2264         if (!rdev->ops->stop_ap)
2265                 return -EOPNOTSUPP;
2266
2267         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2268             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2269                 return -EOPNOTSUPP;
2270
2271         if (!wdev->beacon_interval)
2272                 return -ENOENT;
2273
2274         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2275         if (!err)
2276                 wdev->beacon_interval = 0;
2277         return err;
2278 }
2279
2280 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2281         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2282         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2283         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2284         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2285         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2286         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2287 };
2288
2289 static int parse_station_flags(struct genl_info *info,
2290                                enum nl80211_iftype iftype,
2291                                struct station_parameters *params)
2292 {
2293         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2294         struct nlattr *nla;
2295         int flag;
2296
2297         /*
2298          * Try parsing the new attribute first so userspace
2299          * can specify both for older kernels.
2300          */
2301         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2302         if (nla) {
2303                 struct nl80211_sta_flag_update *sta_flags;
2304
2305                 sta_flags = nla_data(nla);
2306                 params->sta_flags_mask = sta_flags->mask;
2307                 params->sta_flags_set = sta_flags->set;
2308                 if ((params->sta_flags_mask |
2309                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2310                         return -EINVAL;
2311                 return 0;
2312         }
2313
2314         /* if present, parse the old attribute */
2315
2316         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2317         if (!nla)
2318                 return 0;
2319
2320         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2321                              nla, sta_flags_policy))
2322                 return -EINVAL;
2323
2324         /*
2325          * Only allow certain flags for interface types so that
2326          * other attributes are silently ignored. Remember that
2327          * this is backward compatibility code with old userspace
2328          * and shouldn't be hit in other cases anyway.
2329          */
2330         switch (iftype) {
2331         case NL80211_IFTYPE_AP:
2332         case NL80211_IFTYPE_AP_VLAN:
2333         case NL80211_IFTYPE_P2P_GO:
2334                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2335                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2336                                          BIT(NL80211_STA_FLAG_WME) |
2337                                          BIT(NL80211_STA_FLAG_MFP);
2338                 break;
2339         case NL80211_IFTYPE_P2P_CLIENT:
2340         case NL80211_IFTYPE_STATION:
2341                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2342                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2343                 break;
2344         case NL80211_IFTYPE_MESH_POINT:
2345                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2346                                          BIT(NL80211_STA_FLAG_MFP) |
2347                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2348         default:
2349                 return -EINVAL;
2350         }
2351
2352         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2353                 if (flags[flag])
2354                         params->sta_flags_set |= (1<<flag);
2355
2356         return 0;
2357 }
2358
2359 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2360                                  int attr)
2361 {
2362         struct nlattr *rate;
2363         u16 bitrate;
2364
2365         rate = nla_nest_start(msg, attr);
2366         if (!rate)
2367                 goto nla_put_failure;
2368
2369         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2370         bitrate = cfg80211_calculate_bitrate(info);
2371         if (bitrate > 0)
2372                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2373
2374         if (info->flags & RATE_INFO_FLAGS_MCS)
2375                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2376         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2377                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2378         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2379                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2380
2381         nla_nest_end(msg, rate);
2382         return true;
2383
2384 nla_put_failure:
2385         return false;
2386 }
2387
2388 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2389                                 int flags, struct net_device *dev,
2390                                 const u8 *mac_addr, struct station_info *sinfo)
2391 {
2392         void *hdr;
2393         struct nlattr *sinfoattr, *bss_param;
2394
2395         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2396         if (!hdr)
2397                 return -1;
2398
2399         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2400         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2401
2402         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2403
2404         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2405         if (!sinfoattr)
2406                 goto nla_put_failure;
2407         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2408                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2409                             sinfo->connected_time);
2410         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2411                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2412                             sinfo->inactive_time);
2413         if (sinfo->filled & STATION_INFO_RX_BYTES)
2414                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2415                             sinfo->rx_bytes);
2416         if (sinfo->filled & STATION_INFO_TX_BYTES)
2417                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2418                             sinfo->tx_bytes);
2419         if (sinfo->filled & STATION_INFO_LLID)
2420                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2421                             sinfo->llid);
2422         if (sinfo->filled & STATION_INFO_PLID)
2423                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2424                             sinfo->plid);
2425         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2426                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2427                             sinfo->plink_state);
2428         if (sinfo->filled & STATION_INFO_SIGNAL)
2429                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2430                            sinfo->signal);
2431         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2432                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2433                            sinfo->signal_avg);
2434         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2435                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2436                                           NL80211_STA_INFO_TX_BITRATE))
2437                         goto nla_put_failure;
2438         }
2439         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2440                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2441                                           NL80211_STA_INFO_RX_BITRATE))
2442                         goto nla_put_failure;
2443         }
2444         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2445                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2446                             sinfo->rx_packets);
2447         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2448                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2449                             sinfo->tx_packets);
2450         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2451                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2452                             sinfo->tx_retries);
2453         if (sinfo->filled & STATION_INFO_TX_FAILED)
2454                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2455                             sinfo->tx_failed);
2456         if (sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT)
2457                 NLA_PUT_U32(msg, NL80211_STA_INFO_BEACON_LOSS,
2458                             sinfo->beacon_loss_count);
2459         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2460                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2461                 if (!bss_param)
2462                         goto nla_put_failure;
2463
2464                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2465                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2466                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2467                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2468                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2469                         NLA_PUT_FLAG(msg,
2470                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2471                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2472                            sinfo->bss_param.dtim_period);
2473                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2474                             sinfo->bss_param.beacon_interval);
2475
2476                 nla_nest_end(msg, bss_param);
2477         }
2478         if (sinfo->filled & STATION_INFO_STA_FLAGS)
2479                 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2480                         sizeof(struct nl80211_sta_flag_update),
2481                         &sinfo->sta_flags);
2482         nla_nest_end(msg, sinfoattr);
2483
2484         if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2485                 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2486                         sinfo->assoc_req_ies);
2487
2488         return genlmsg_end(msg, hdr);
2489
2490  nla_put_failure:
2491         genlmsg_cancel(msg, hdr);
2492         return -EMSGSIZE;
2493 }
2494
2495 static int nl80211_dump_station(struct sk_buff *skb,
2496                                 struct netlink_callback *cb)
2497 {
2498         struct station_info sinfo;
2499         struct cfg80211_registered_device *dev;
2500         struct net_device *netdev;
2501         u8 mac_addr[ETH_ALEN];
2502         int sta_idx = cb->args[1];
2503         int err;
2504
2505         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2506         if (err)
2507                 return err;
2508
2509         if (!dev->ops->dump_station) {
2510                 err = -EOPNOTSUPP;
2511                 goto out_err;
2512         }
2513
2514         while (1) {
2515                 memset(&sinfo, 0, sizeof(sinfo));
2516                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2517                                              mac_addr, &sinfo);
2518                 if (err == -ENOENT)
2519                         break;
2520                 if (err)
2521                         goto out_err;
2522
2523                 if (nl80211_send_station(skb,
2524                                 NETLINK_CB(cb->skb).pid,
2525                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2526                                 netdev, mac_addr,
2527                                 &sinfo) < 0)
2528                         goto out;
2529
2530                 sta_idx++;
2531         }
2532
2533
2534  out:
2535         cb->args[1] = sta_idx;
2536         err = skb->len;
2537  out_err:
2538         nl80211_finish_netdev_dump(dev);
2539
2540         return err;
2541 }
2542
2543 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2544 {
2545         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2546         struct net_device *dev = info->user_ptr[1];
2547         struct station_info sinfo;
2548         struct sk_buff *msg;
2549         u8 *mac_addr = NULL;
2550         int err;
2551
2552         memset(&sinfo, 0, sizeof(sinfo));
2553
2554         if (!info->attrs[NL80211_ATTR_MAC])
2555                 return -EINVAL;
2556
2557         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2558
2559         if (!rdev->ops->get_station)
2560                 return -EOPNOTSUPP;
2561
2562         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2563         if (err)
2564                 return err;
2565
2566         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2567         if (!msg)
2568                 return -ENOMEM;
2569
2570         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2571                                  dev, mac_addr, &sinfo) < 0) {
2572                 nlmsg_free(msg);
2573                 return -ENOBUFS;
2574         }
2575
2576         return genlmsg_reply(msg, info);
2577 }
2578
2579 /*
2580  * Get vlan interface making sure it is running and on the right wiphy.
2581  */
2582 static struct net_device *get_vlan(struct genl_info *info,
2583                                    struct cfg80211_registered_device *rdev)
2584 {
2585         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2586         struct net_device *v;
2587         int ret;
2588
2589         if (!vlanattr)
2590                 return NULL;
2591
2592         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2593         if (!v)
2594                 return ERR_PTR(-ENODEV);
2595
2596         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2597                 ret = -EINVAL;
2598                 goto error;
2599         }
2600
2601         if (!netif_running(v)) {
2602                 ret = -ENETDOWN;
2603                 goto error;
2604         }
2605
2606         return v;
2607  error:
2608         dev_put(v);
2609         return ERR_PTR(ret);
2610 }
2611
2612 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2613 {
2614         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2615         int err;
2616         struct net_device *dev = info->user_ptr[1];
2617         struct station_parameters params;
2618         u8 *mac_addr = NULL;
2619
2620         memset(&params, 0, sizeof(params));
2621
2622         params.listen_interval = -1;
2623         params.plink_state = -1;
2624
2625         if (info->attrs[NL80211_ATTR_STA_AID])
2626                 return -EINVAL;
2627
2628         if (!info->attrs[NL80211_ATTR_MAC])
2629                 return -EINVAL;
2630
2631         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2632
2633         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2634                 params.supported_rates =
2635                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2636                 params.supported_rates_len =
2637                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2638         }
2639
2640         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2641                 params.listen_interval =
2642                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2643
2644         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2645                 params.ht_capa =
2646                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2647
2648         if (!rdev->ops->change_station)
2649                 return -EOPNOTSUPP;
2650
2651         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2652                 return -EINVAL;
2653
2654         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2655                 params.plink_action =
2656                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2657
2658         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2659                 params.plink_state =
2660                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2661
2662         switch (dev->ieee80211_ptr->iftype) {
2663         case NL80211_IFTYPE_AP:
2664         case NL80211_IFTYPE_AP_VLAN:
2665         case NL80211_IFTYPE_P2P_GO:
2666                 /* disallow mesh-specific things */
2667                 if (params.plink_action)
2668                         return -EINVAL;
2669
2670                 /* TDLS can't be set, ... */
2671                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2672                         return -EINVAL;
2673                 /*
2674                  * ... but don't bother the driver with it. This works around
2675                  * a hostapd/wpa_supplicant issue -- it always includes the
2676                  * TLDS_PEER flag in the mask even for AP mode.
2677                  */
2678                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2679
2680                 /* accept only the listed bits */
2681                 if (params.sta_flags_mask &
2682                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2683                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2684                                   BIT(NL80211_STA_FLAG_WME) |
2685                                   BIT(NL80211_STA_FLAG_MFP)))
2686                         return -EINVAL;
2687
2688                 /* must be last in here for error handling */
2689                 params.vlan = get_vlan(info, rdev);
2690                 if (IS_ERR(params.vlan))
2691                         return PTR_ERR(params.vlan);
2692                 break;
2693         case NL80211_IFTYPE_P2P_CLIENT:
2694         case NL80211_IFTYPE_STATION:
2695                 /*
2696                  * Don't allow userspace to change the TDLS_PEER flag,
2697                  * but silently ignore attempts to change it since we
2698                  * don't have state here to verify that it doesn't try
2699                  * to change the flag.
2700                  */
2701                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2702                 /* fall through */
2703         case NL80211_IFTYPE_ADHOC:
2704                 /* disallow things sta doesn't support */
2705                 if (params.plink_action)
2706                         return -EINVAL;
2707                 if (params.ht_capa)
2708                         return -EINVAL;
2709                 if (params.listen_interval >= 0)
2710                         return -EINVAL;
2711                 /* reject any changes other than AUTHORIZED */
2712                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2713                         return -EINVAL;
2714                 break;
2715         case NL80211_IFTYPE_MESH_POINT:
2716                 /* disallow things mesh doesn't support */
2717                 if (params.vlan)
2718                         return -EINVAL;
2719                 if (params.ht_capa)
2720                         return -EINVAL;
2721                 if (params.listen_interval >= 0)
2722                         return -EINVAL;
2723                 /*
2724                  * No special handling for TDLS here -- the userspace
2725                  * mesh code doesn't have this bug.
2726                  */
2727                 if (params.sta_flags_mask &
2728                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2729                                   BIT(NL80211_STA_FLAG_MFP) |
2730                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2731                         return -EINVAL;
2732                 break;
2733         default:
2734                 return -EOPNOTSUPP;
2735         }
2736
2737         /* be aware of params.vlan when changing code here */
2738
2739         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2740
2741         if (params.vlan)
2742                 dev_put(params.vlan);
2743
2744         return err;
2745 }
2746
2747 static struct nla_policy
2748 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2749         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2750         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2751 };
2752
2753 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2754 {
2755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2756         int err;
2757         struct net_device *dev = info->user_ptr[1];
2758         struct station_parameters params;
2759         u8 *mac_addr = NULL;
2760
2761         memset(&params, 0, sizeof(params));
2762
2763         if (!info->attrs[NL80211_ATTR_MAC])
2764                 return -EINVAL;
2765
2766         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2767                 return -EINVAL;
2768
2769         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2770                 return -EINVAL;
2771
2772         if (!info->attrs[NL80211_ATTR_STA_AID])
2773                 return -EINVAL;
2774
2775         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2776         params.supported_rates =
2777                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2778         params.supported_rates_len =
2779                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2780         params.listen_interval =
2781                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2782
2783         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2784         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2785                 return -EINVAL;
2786
2787         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2788                 params.ht_capa =
2789                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2790
2791         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2792                 params.plink_action =
2793                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2794
2795         if (!rdev->ops->add_station)
2796                 return -EOPNOTSUPP;
2797
2798         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2799                 return -EINVAL;
2800
2801         switch (dev->ieee80211_ptr->iftype) {
2802         case NL80211_IFTYPE_AP:
2803         case NL80211_IFTYPE_AP_VLAN:
2804         case NL80211_IFTYPE_P2P_GO:
2805                 /* parse WME attributes if sta is WME capable */
2806                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2807                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2808                     info->attrs[NL80211_ATTR_STA_WME]) {
2809                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2810                         struct nlattr *nla;
2811
2812                         nla = info->attrs[NL80211_ATTR_STA_WME];
2813                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2814                                                nl80211_sta_wme_policy);
2815                         if (err)
2816                                 return err;
2817
2818                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2819                                 params.uapsd_queues =
2820                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2821                         if (params.uapsd_queues &
2822                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2823                                 return -EINVAL;
2824
2825                         if (tb[NL80211_STA_WME_MAX_SP])
2826                                 params.max_sp =
2827                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2828
2829                         if (params.max_sp &
2830                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2831                                 return -EINVAL;
2832
2833                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2834                 }
2835                 /* TDLS peers cannot be added */
2836                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2837                         return -EINVAL;
2838                 /* but don't bother the driver with it */
2839                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2840
2841                 /* must be last in here for error handling */
2842                 params.vlan = get_vlan(info, rdev);
2843                 if (IS_ERR(params.vlan))
2844                         return PTR_ERR(params.vlan);
2845                 break;
2846         case NL80211_IFTYPE_MESH_POINT:
2847                 /* TDLS peers cannot be added */
2848                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2849                         return -EINVAL;
2850                 break;
2851         case NL80211_IFTYPE_STATION:
2852                 /* Only TDLS peers can be added */
2853                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2854                         return -EINVAL;
2855                 /* Can only add if TDLS ... */
2856                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2857                         return -EOPNOTSUPP;
2858                 /* ... with external setup is supported */
2859                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2860                         return -EOPNOTSUPP;
2861                 break;
2862         default:
2863                 return -EOPNOTSUPP;
2864         }
2865
2866         /* be aware of params.vlan when changing code here */
2867
2868         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2869
2870         if (params.vlan)
2871                 dev_put(params.vlan);
2872         return err;
2873 }
2874
2875 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2876 {
2877         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2878         struct net_device *dev = info->user_ptr[1];
2879         u8 *mac_addr = NULL;
2880
2881         if (info->attrs[NL80211_ATTR_MAC])
2882                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2883
2884         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2885             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2886             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2887             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2888                 return -EINVAL;
2889
2890         if (!rdev->ops->del_station)
2891                 return -EOPNOTSUPP;
2892
2893         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2894 }
2895
2896 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2897                                 int flags, struct net_device *dev,
2898                                 u8 *dst, u8 *next_hop,
2899                                 struct mpath_info *pinfo)
2900 {
2901         void *hdr;
2902         struct nlattr *pinfoattr;
2903
2904         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2905         if (!hdr)
2906                 return -1;
2907
2908         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2909         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2910         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2911
2912         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2913
2914         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2915         if (!pinfoattr)
2916                 goto nla_put_failure;
2917         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2918                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2919                             pinfo->frame_qlen);
2920         if (pinfo->filled & MPATH_INFO_SN)
2921                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2922                             pinfo->sn);
2923         if (pinfo->filled & MPATH_INFO_METRIC)
2924                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2925                             pinfo->metric);
2926         if (pinfo->filled & MPATH_INFO_EXPTIME)
2927                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2928                             pinfo->exptime);
2929         if (pinfo->filled & MPATH_INFO_FLAGS)
2930                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2931                             pinfo->flags);
2932         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2933                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2934                             pinfo->discovery_timeout);
2935         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2936                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2937                             pinfo->discovery_retries);
2938
2939         nla_nest_end(msg, pinfoattr);
2940
2941         return genlmsg_end(msg, hdr);
2942
2943  nla_put_failure:
2944         genlmsg_cancel(msg, hdr);
2945         return -EMSGSIZE;
2946 }
2947
2948 static int nl80211_dump_mpath(struct sk_buff *skb,
2949                               struct netlink_callback *cb)
2950 {
2951         struct mpath_info pinfo;
2952         struct cfg80211_registered_device *dev;
2953         struct net_device *netdev;
2954         u8 dst[ETH_ALEN];
2955         u8 next_hop[ETH_ALEN];
2956         int path_idx = cb->args[1];
2957         int err;
2958
2959         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2960         if (err)
2961                 return err;
2962
2963         if (!dev->ops->dump_mpath) {
2964                 err = -EOPNOTSUPP;
2965                 goto out_err;
2966         }
2967
2968         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2969                 err = -EOPNOTSUPP;
2970                 goto out_err;
2971         }
2972
2973         while (1) {
2974                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2975                                            dst, next_hop, &pinfo);
2976                 if (err == -ENOENT)
2977                         break;
2978                 if (err)
2979                         goto out_err;
2980
2981                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2982                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2983                                        netdev, dst, next_hop,
2984                                        &pinfo) < 0)
2985                         goto out;
2986
2987                 path_idx++;
2988         }
2989
2990
2991  out:
2992         cb->args[1] = path_idx;
2993         err = skb->len;
2994  out_err:
2995         nl80211_finish_netdev_dump(dev);
2996         return err;
2997 }
2998
2999 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3000 {
3001         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3002         int err;
3003         struct net_device *dev = info->user_ptr[1];
3004         struct mpath_info pinfo;
3005         struct sk_buff *msg;
3006         u8 *dst = NULL;
3007         u8 next_hop[ETH_ALEN];
3008
3009         memset(&pinfo, 0, sizeof(pinfo));
3010
3011         if (!info->attrs[NL80211_ATTR_MAC])
3012                 return -EINVAL;
3013
3014         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3015
3016         if (!rdev->ops->get_mpath)
3017                 return -EOPNOTSUPP;
3018
3019         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3020                 return -EOPNOTSUPP;
3021
3022         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3023         if (err)
3024                 return err;
3025
3026         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3027         if (!msg)
3028                 return -ENOMEM;
3029
3030         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3031                                  dev, dst, next_hop, &pinfo) < 0) {
3032                 nlmsg_free(msg);
3033                 return -ENOBUFS;
3034         }
3035
3036         return genlmsg_reply(msg, info);
3037 }
3038
3039 static int nl80211_set_mpath(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 *dst = NULL;
3044         u8 *next_hop = NULL;
3045
3046         if (!info->attrs[NL80211_ATTR_MAC])
3047                 return -EINVAL;
3048
3049         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3050                 return -EINVAL;
3051
3052         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3053         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3054
3055         if (!rdev->ops->change_mpath)
3056                 return -EOPNOTSUPP;
3057
3058         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3059                 return -EOPNOTSUPP;
3060
3061         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3062 }
3063
3064 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3065 {
3066         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3067         struct net_device *dev = info->user_ptr[1];
3068         u8 *dst = NULL;
3069         u8 *next_hop = NULL;
3070
3071         if (!info->attrs[NL80211_ATTR_MAC])
3072                 return -EINVAL;
3073
3074         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3075                 return -EINVAL;
3076
3077         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3078         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3079
3080         if (!rdev->ops->add_mpath)
3081                 return -EOPNOTSUPP;
3082
3083         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3084                 return -EOPNOTSUPP;
3085
3086         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3087 }
3088
3089 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3090 {
3091         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3092         struct net_device *dev = info->user_ptr[1];
3093         u8 *dst = NULL;
3094
3095         if (info->attrs[NL80211_ATTR_MAC])
3096                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3097
3098         if (!rdev->ops->del_mpath)
3099                 return -EOPNOTSUPP;
3100
3101         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3102 }
3103
3104 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3105 {
3106         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3107         struct net_device *dev = info->user_ptr[1];
3108         struct bss_parameters params;
3109
3110         memset(&params, 0, sizeof(params));
3111         /* default to not changing parameters */
3112         params.use_cts_prot = -1;
3113         params.use_short_preamble = -1;
3114         params.use_short_slot_time = -1;
3115         params.ap_isolate = -1;
3116         params.ht_opmode = -1;
3117
3118         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3119                 params.use_cts_prot =
3120                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3121         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3122                 params.use_short_preamble =
3123                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3124         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3125                 params.use_short_slot_time =
3126                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3127         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3128                 params.basic_rates =
3129                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3130                 params.basic_rates_len =
3131                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3132         }
3133         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3134                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3135         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3136                 params.ht_opmode =
3137                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3138
3139         if (!rdev->ops->change_bss)
3140                 return -EOPNOTSUPP;
3141
3142         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3143             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3144                 return -EOPNOTSUPP;
3145
3146         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3147 }
3148
3149 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3150         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3151         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3152         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3153         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3154         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3155         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3156 };
3157
3158 static int parse_reg_rule(struct nlattr *tb[],
3159         struct ieee80211_reg_rule *reg_rule)
3160 {
3161         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3162         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3163
3164         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3165                 return -EINVAL;
3166         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3167                 return -EINVAL;
3168         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3169                 return -EINVAL;
3170         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3171                 return -EINVAL;
3172         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3173                 return -EINVAL;
3174
3175         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3176
3177         freq_range->start_freq_khz =
3178                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3179         freq_range->end_freq_khz =
3180                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3181         freq_range->max_bandwidth_khz =
3182                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3183
3184         power_rule->max_eirp =
3185                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3186
3187         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3188                 power_rule->max_antenna_gain =
3189                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3190
3191         return 0;
3192 }
3193
3194 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3195 {
3196         int r;
3197         char *data = NULL;
3198
3199         /*
3200          * You should only get this when cfg80211 hasn't yet initialized
3201          * completely when built-in to the kernel right between the time
3202          * window between nl80211_init() and regulatory_init(), if that is
3203          * even possible.
3204          */
3205         mutex_lock(&cfg80211_mutex);
3206         if (unlikely(!cfg80211_regdomain)) {
3207                 mutex_unlock(&cfg80211_mutex);
3208                 return -EINPROGRESS;
3209         }
3210         mutex_unlock(&cfg80211_mutex);
3211
3212         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3213                 return -EINVAL;
3214
3215         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3216
3217         r = regulatory_hint_user(data);
3218
3219         return r;
3220 }
3221
3222 static int nl80211_get_mesh_config(struct sk_buff *skb,
3223                                    struct genl_info *info)
3224 {
3225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3226         struct net_device *dev = info->user_ptr[1];
3227         struct wireless_dev *wdev = dev->ieee80211_ptr;
3228         struct mesh_config cur_params;
3229         int err = 0;
3230         void *hdr;
3231         struct nlattr *pinfoattr;
3232         struct sk_buff *msg;
3233
3234         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3235                 return -EOPNOTSUPP;
3236
3237         if (!rdev->ops->get_mesh_config)
3238                 return -EOPNOTSUPP;
3239
3240         wdev_lock(wdev);
3241         /* If not connected, get default parameters */
3242         if (!wdev->mesh_id_len)
3243                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3244         else
3245                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3246                                                  &cur_params);
3247         wdev_unlock(wdev);
3248
3249         if (err)
3250                 return err;
3251
3252         /* Draw up a netlink message to send back */
3253         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3254         if (!msg)
3255                 return -ENOMEM;
3256         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3257                              NL80211_CMD_GET_MESH_CONFIG);
3258         if (!hdr)
3259                 goto out;
3260         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3261         if (!pinfoattr)
3262                 goto nla_put_failure;
3263         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3264         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3265                         cur_params.dot11MeshRetryTimeout);
3266         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3267                         cur_params.dot11MeshConfirmTimeout);
3268         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3269                         cur_params.dot11MeshHoldingTimeout);
3270         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3271                         cur_params.dot11MeshMaxPeerLinks);
3272         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3273                         cur_params.dot11MeshMaxRetries);
3274         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3275                         cur_params.dot11MeshTTL);
3276         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3277                         cur_params.element_ttl);
3278         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3279                         cur_params.auto_open_plinks);
3280         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3281                         cur_params.dot11MeshHWMPmaxPREQretries);
3282         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3283                         cur_params.path_refresh_time);
3284         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3285                         cur_params.min_discovery_timeout);
3286         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3287                         cur_params.dot11MeshHWMPactivePathTimeout);
3288         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3289                         cur_params.dot11MeshHWMPpreqMinInterval);
3290         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3291                         cur_params.dot11MeshHWMPperrMinInterval);
3292         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3293                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3294         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3295                         cur_params.dot11MeshHWMPRootMode);
3296         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3297                         cur_params.dot11MeshHWMPRannInterval);
3298         NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3299                         cur_params.dot11MeshGateAnnouncementProtocol);
3300         NLA_PUT_U8(msg, NL80211_MESHCONF_FORWARDING,
3301                         cur_params.dot11MeshForwarding);
3302         NLA_PUT_U32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3303                         cur_params.rssi_threshold);
3304         nla_nest_end(msg, pinfoattr);
3305         genlmsg_end(msg, hdr);
3306         return genlmsg_reply(msg, info);
3307
3308  nla_put_failure:
3309         genlmsg_cancel(msg, hdr);
3310  out:
3311         nlmsg_free(msg);
3312         return -ENOBUFS;
3313 }
3314
3315 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3316         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3317         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3318         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3319         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3320         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3321         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3322         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3323         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3324
3325         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3326         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3327         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3328         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3329         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3330         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3331         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3332         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3333         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3334         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3335         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3336         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3337 };
3338
3339 static const struct nla_policy
3340         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3341         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3342         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3343         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3344         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3345                 .len = IEEE80211_MAX_DATA_LEN },
3346         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3347 };
3348
3349 static int nl80211_parse_mesh_config(struct genl_info *info,
3350                                      struct mesh_config *cfg,
3351                                      u32 *mask_out)
3352 {
3353         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3354         u32 mask = 0;
3355
3356 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3357 do {\
3358         if (table[attr_num]) {\
3359                 cfg->param = nla_fn(table[attr_num]); \
3360                 mask |= (1 << (attr_num - 1)); \
3361         } \
3362 } while (0);\
3363
3364
3365         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3366                 return -EINVAL;
3367         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3368                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3369                              nl80211_meshconf_params_policy))
3370                 return -EINVAL;
3371
3372         /* This makes sure that there aren't more than 32 mesh config
3373          * parameters (otherwise our bitfield scheme would not work.) */
3374         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3375
3376         /* Fill in the params struct */
3377         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3378                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3379         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3380                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3381         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3382                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3383         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3384                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3385         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3386                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3387         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3388                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3389         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3390                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3391         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3392                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3393         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3394                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3395                         nla_get_u8);
3396         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3397                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3398         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3399                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3400                         nla_get_u16);
3401         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3402                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3403                         nla_get_u32);
3404         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3405                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3406                         nla_get_u16);
3407         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3408                         mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3409                         nla_get_u16);
3410         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3411                         dot11MeshHWMPnetDiameterTraversalTime,
3412                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3413                         nla_get_u16);
3414         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3415                         dot11MeshHWMPRootMode, mask,
3416                         NL80211_MESHCONF_HWMP_ROOTMODE,
3417                         nla_get_u8);
3418         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3419                         dot11MeshHWMPRannInterval, mask,
3420                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3421                         nla_get_u16);
3422         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3423                         dot11MeshGateAnnouncementProtocol, mask,
3424                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3425                         nla_get_u8);
3426         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3427                         mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3428         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3429                         mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3430         if (mask_out)
3431                 *mask_out = mask;
3432
3433         return 0;
3434
3435 #undef FILL_IN_MESH_PARAM_IF_SET
3436 }
3437
3438 static int nl80211_parse_mesh_setup(struct genl_info *info,
3439                                      struct mesh_setup *setup)
3440 {
3441         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3442
3443         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3444                 return -EINVAL;
3445         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3446                              info->attrs[NL80211_ATTR_MESH_SETUP],
3447                              nl80211_mesh_setup_params_policy))
3448                 return -EINVAL;
3449
3450         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3451                 setup->path_sel_proto =
3452                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3453                  IEEE80211_PATH_PROTOCOL_VENDOR :
3454                  IEEE80211_PATH_PROTOCOL_HWMP;
3455
3456         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3457                 setup->path_metric =
3458                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3459                  IEEE80211_PATH_METRIC_VENDOR :
3460                  IEEE80211_PATH_METRIC_AIRTIME;
3461
3462
3463         if (tb[NL80211_MESH_SETUP_IE]) {
3464                 struct nlattr *ieattr =
3465                         tb[NL80211_MESH_SETUP_IE];
3466                 if (!is_valid_ie_attr(ieattr))
3467                         return -EINVAL;
3468                 setup->ie = nla_data(ieattr);
3469                 setup->ie_len = nla_len(ieattr);
3470         }
3471         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3472         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3473
3474         return 0;
3475 }
3476
3477 static int nl80211_update_mesh_config(struct sk_buff *skb,
3478                                       struct genl_info *info)
3479 {
3480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3481         struct net_device *dev = info->user_ptr[1];
3482         struct wireless_dev *wdev = dev->ieee80211_ptr;
3483         struct mesh_config cfg;
3484         u32 mask;
3485         int err;
3486
3487         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3488                 return -EOPNOTSUPP;
3489
3490         if (!rdev->ops->update_mesh_config)
3491                 return -EOPNOTSUPP;
3492
3493         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3494         if (err)
3495                 return err;
3496
3497         wdev_lock(wdev);
3498         if (!wdev->mesh_id_len)
3499                 err = -ENOLINK;
3500
3501         if (!err)
3502                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3503                                                     mask, &cfg);
3504
3505         wdev_unlock(wdev);
3506
3507         return err;
3508 }
3509
3510 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3511 {
3512         struct sk_buff *msg;
3513         void *hdr = NULL;
3514         struct nlattr *nl_reg_rules;
3515         unsigned int i;
3516         int err = -EINVAL;
3517
3518         mutex_lock(&cfg80211_mutex);
3519
3520         if (!cfg80211_regdomain)
3521                 goto out;
3522
3523         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3524         if (!msg) {
3525                 err = -ENOBUFS;
3526                 goto out;
3527         }
3528
3529         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3530                              NL80211_CMD_GET_REG);
3531         if (!hdr)
3532                 goto put_failure;
3533
3534         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3535                 cfg80211_regdomain->alpha2);
3536         if (cfg80211_regdomain->dfs_region)
3537                 NLA_PUT_U8(msg, NL80211_ATTR_DFS_REGION,
3538                            cfg80211_regdomain->dfs_region);
3539
3540         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3541         if (!nl_reg_rules)
3542                 goto nla_put_failure;
3543
3544         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3545                 struct nlattr *nl_reg_rule;
3546                 const struct ieee80211_reg_rule *reg_rule;
3547                 const struct ieee80211_freq_range *freq_range;
3548                 const struct ieee80211_power_rule *power_rule;
3549
3550                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3551                 freq_range = &reg_rule->freq_range;
3552                 power_rule = &reg_rule->power_rule;
3553
3554                 nl_reg_rule = nla_nest_start(msg, i);
3555                 if (!nl_reg_rule)
3556                         goto nla_put_failure;
3557
3558                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3559                         reg_rule->flags);
3560                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3561                         freq_range->start_freq_khz);
3562                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3563                         freq_range->end_freq_khz);
3564                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3565                         freq_range->max_bandwidth_khz);
3566                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3567                         power_rule->max_antenna_gain);
3568                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3569                         power_rule->max_eirp);
3570
3571                 nla_nest_end(msg, nl_reg_rule);
3572         }
3573
3574         nla_nest_end(msg, nl_reg_rules);
3575
3576         genlmsg_end(msg, hdr);
3577         err = genlmsg_reply(msg, info);
3578         goto out;
3579
3580 nla_put_failure:
3581         genlmsg_cancel(msg, hdr);
3582 put_failure:
3583         nlmsg_free(msg);
3584         err = -EMSGSIZE;
3585 out:
3586         mutex_unlock(&cfg80211_mutex);
3587         return err;
3588 }
3589
3590 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3591 {
3592         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3593         struct nlattr *nl_reg_rule;
3594         char *alpha2 = NULL;
3595         int rem_reg_rules = 0, r = 0;
3596         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3597         u8 dfs_region = 0;
3598         struct ieee80211_regdomain *rd = NULL;
3599
3600         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3601                 return -EINVAL;
3602
3603         if (!info->attrs[NL80211_ATTR_REG_RULES])
3604                 return -EINVAL;
3605
3606         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3607
3608         if (info->attrs[NL80211_ATTR_DFS_REGION])
3609                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3610
3611         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3612                         rem_reg_rules) {
3613                 num_rules++;
3614                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3615                         return -EINVAL;
3616         }
3617
3618         mutex_lock(&cfg80211_mutex);
3619
3620         if (!reg_is_valid_request(alpha2)) {
3621                 r = -EINVAL;
3622                 goto bad_reg;
3623         }
3624
3625         size_of_regd = sizeof(struct ieee80211_regdomain) +
3626                 (num_rules * sizeof(struct ieee80211_reg_rule));
3627
3628         rd = kzalloc(size_of_regd, GFP_KERNEL);
3629         if (!rd) {
3630                 r = -ENOMEM;
3631                 goto bad_reg;
3632         }
3633
3634         rd->n_reg_rules = num_rules;
3635         rd->alpha2[0] = alpha2[0];
3636         rd->alpha2[1] = alpha2[1];
3637
3638         /*
3639          * Disable DFS master mode if the DFS region was
3640          * not supported or known on this kernel.
3641          */
3642         if (reg_supported_dfs_region(dfs_region))
3643                 rd->dfs_region = dfs_region;
3644
3645         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3646                         rem_reg_rules) {
3647                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3648                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3649                         reg_rule_policy);
3650                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3651                 if (r)
3652                         goto bad_reg;
3653
3654                 rule_idx++;
3655
3656                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3657                         r = -EINVAL;
3658                         goto bad_reg;
3659                 }
3660         }
3661
3662         BUG_ON(rule_idx != num_rules);
3663
3664         r = set_regdom(rd);
3665
3666         mutex_unlock(&cfg80211_mutex);
3667
3668         return r;
3669
3670  bad_reg:
3671         mutex_unlock(&cfg80211_mutex);
3672         kfree(rd);
3673         return r;
3674 }
3675
3676 static int validate_scan_freqs(struct nlattr *freqs)
3677 {
3678         struct nlattr *attr1, *attr2;
3679         int n_channels = 0, tmp1, tmp2;
3680
3681         nla_for_each_nested(attr1, freqs, tmp1) {
3682                 n_channels++;
3683                 /*
3684                  * Some hardware has a limited channel list for
3685                  * scanning, and it is pretty much nonsensical
3686                  * to scan for a channel twice, so disallow that
3687                  * and don't require drivers to check that the
3688                  * channel list they get isn't longer than what
3689                  * they can scan, as long as they can scan all
3690                  * the channels they registered at once.
3691                  */
3692                 nla_for_each_nested(attr2, freqs, tmp2)
3693                         if (attr1 != attr2 &&
3694                             nla_get_u32(attr1) == nla_get_u32(attr2))
3695                                 return 0;
3696         }
3697
3698         return n_channels;
3699 }
3700
3701 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3702 {
3703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3704         struct net_device *dev = info->user_ptr[1];
3705         struct cfg80211_scan_request *request;
3706         struct nlattr *attr;
3707         struct wiphy *wiphy;
3708         int err, tmp, n_ssids = 0, n_channels, i;
3709         size_t ie_len;
3710
3711         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3712                 return -EINVAL;
3713
3714         wiphy = &rdev->wiphy;
3715
3716         if (!rdev->ops->scan)
3717                 return -EOPNOTSUPP;
3718
3719         if (rdev->scan_req)
3720                 return -EBUSY;
3721
3722         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3723                 n_channels = validate_scan_freqs(
3724                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3725                 if (!n_channels)
3726                         return -EINVAL;
3727         } else {
3728                 enum ieee80211_band band;
3729                 n_channels = 0;
3730
3731                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3732                         if (wiphy->bands[band])
3733                                 n_channels += wiphy->bands[band]->n_channels;
3734         }
3735
3736         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3737                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3738                         n_ssids++;
3739
3740         if (n_ssids > wiphy->max_scan_ssids)
3741                 return -EINVAL;
3742
3743         if (info->attrs[NL80211_ATTR_IE])
3744                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3745         else
3746                 ie_len = 0;
3747
3748         if (ie_len > wiphy->max_scan_ie_len)
3749                 return -EINVAL;
3750
3751         request = kzalloc(sizeof(*request)
3752                         + sizeof(*request->ssids) * n_ssids
3753                         + sizeof(*request->channels) * n_channels
3754                         + ie_len, GFP_KERNEL);
3755         if (!request)
3756                 return -ENOMEM;
3757
3758         if (n_ssids)
3759                 request->ssids = (void *)&request->channels[n_channels];
3760         request->n_ssids = n_ssids;
3761         if (ie_len) {
3762                 if (request->ssids)
3763                         request->ie = (void *)(request->ssids + n_ssids);
3764                 else
3765                         request->ie = (void *)(request->channels + n_channels);
3766         }
3767
3768         i = 0;
3769         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3770                 /* user specified, bail out if channel not found */
3771                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3772                         struct ieee80211_channel *chan;
3773
3774                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3775
3776                         if (!chan) {
3777                                 err = -EINVAL;
3778                                 goto out_free;
3779                         }
3780
3781                         /* ignore disabled channels */
3782                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3783                                 continue;
3784
3785                         request->channels[i] = chan;
3786                         i++;
3787                 }
3788         } else {
3789                 enum ieee80211_band band;
3790
3791                 /* all channels */
3792                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3793                         int j;
3794                         if (!wiphy->bands[band])
3795                                 continue;
3796                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3797                                 struct ieee80211_channel *chan;
3798
3799                                 chan = &wiphy->bands[band]->channels[j];
3800
3801                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3802                                         continue;
3803
3804                                 request->channels[i] = chan;
3805                                 i++;
3806                         }
3807                 }
3808         }
3809
3810         if (!i) {
3811                 err = -EINVAL;
3812                 goto out_free;
3813         }
3814
3815         request->n_channels = i;
3816
3817         i = 0;
3818         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3819                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3820                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3821                                 err = -EINVAL;
3822                                 goto out_free;
3823                         }
3824                         request->ssids[i].ssid_len = nla_len(attr);
3825                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3826                         i++;
3827                 }
3828         }
3829
3830         if (info->attrs[NL80211_ATTR_IE]) {
3831                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3832                 memcpy((void *)request->ie,
3833                        nla_data(info->attrs[NL80211_ATTR_IE]),
3834                        request->ie_len);
3835         }
3836
3837         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3838                 if (wiphy->bands[i])
3839                         request->rates[i] =
3840                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3841
3842         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3843                 nla_for_each_nested(attr,
3844                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3845                                     tmp) {
3846                         enum ieee80211_band band = nla_type(attr);
3847
3848                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3849                                 err = -EINVAL;
3850                                 goto out_free;
3851                         }
3852                         err = ieee80211_get_ratemask(wiphy->bands[band],
3853                                                      nla_data(attr),
3854                                                      nla_len(attr),
3855                                                      &request->rates[band]);
3856                         if (err)
3857                                 goto out_free;
3858                 }
3859         }
3860
3861         request->no_cck =
3862                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3863
3864         request->dev = dev;
3865         request->wiphy = &rdev->wiphy;
3866
3867         rdev->scan_req = request;
3868         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3869
3870         if (!err) {
3871                 nl80211_send_scan_start(rdev, dev);
3872                 dev_hold(dev);
3873         } else {
3874  out_free:
3875                 rdev->scan_req = NULL;
3876                 kfree(request);
3877         }
3878
3879         return err;
3880 }
3881
3882 static int nl80211_start_sched_scan(struct sk_buff *skb,
3883                                     struct genl_info *info)
3884 {
3885         struct cfg80211_sched_scan_request *request;
3886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3887         struct net_device *dev = info->user_ptr[1];
3888         struct nlattr *attr;
3889         struct wiphy *wiphy;
3890         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3891         u32 interval;
3892         enum ieee80211_band band;
3893         size_t ie_len;
3894         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3895
3896         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3897             !rdev->ops->sched_scan_start)
3898                 return -EOPNOTSUPP;
3899
3900         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3901                 return -EINVAL;
3902
3903         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3904                 return -EINVAL;
3905
3906         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3907         if (interval == 0)
3908                 return -EINVAL;
3909
3910         wiphy = &rdev->wiphy;
3911
3912         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3913                 n_channels = validate_scan_freqs(
3914                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3915                 if (!n_channels)
3916                         return -EINVAL;
3917         } else {
3918                 n_channels = 0;
3919
3920                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3921                         if (wiphy->bands[band])
3922                                 n_channels += wiphy->bands[band]->n_channels;
3923         }
3924
3925         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3926                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3927                                     tmp)
3928                         n_ssids++;
3929
3930         if (n_ssids > wiphy->max_sched_scan_ssids)
3931                 return -EINVAL;
3932
3933         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3934                 nla_for_each_nested(attr,
3935                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3936                                     tmp)
3937                         n_match_sets++;
3938
3939         if (n_match_sets > wiphy->max_match_sets)
3940                 return -EINVAL;
3941
3942         if (info->attrs[NL80211_ATTR_IE])
3943                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3944         else
3945                 ie_len = 0;
3946
3947         if (ie_len > wiphy->max_sched_scan_ie_len)
3948                 return -EINVAL;
3949
3950         mutex_lock(&rdev->sched_scan_mtx);
3951
3952         if (rdev->sched_scan_req) {
3953                 err = -EINPROGRESS;
3954                 goto out;
3955         }
3956
3957         request = kzalloc(sizeof(*request)
3958                         + sizeof(*request->ssids) * n_ssids
3959                         + sizeof(*request->match_sets) * n_match_sets
3960                         + sizeof(*request->channels) * n_channels
3961                         + ie_len, GFP_KERNEL);
3962         if (!request) {
3963                 err = -ENOMEM;
3964                 goto out;
3965         }
3966
3967         if (n_ssids)
3968                 request->ssids = (void *)&request->channels[n_channels];
3969         request->n_ssids = n_ssids;
3970         if (ie_len) {
3971                 if (request->ssids)
3972                         request->ie = (void *)(request->ssids + n_ssids);
3973                 else
3974                         request->ie = (void *)(request->channels + n_channels);
3975         }
3976
3977         if (n_match_sets) {
3978                 if (request->ie)
3979                         request->match_sets = (void *)(request->ie + ie_len);
3980                 else if (request->ssids)
3981                         request->match_sets =
3982                                 (void *)(request->ssids + n_ssids);
3983                 else
3984                         request->match_sets =
3985                                 (void *)(request->channels + n_channels);
3986         }
3987         request->n_match_sets = n_match_sets;
3988
3989         i = 0;
3990         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3991                 /* user specified, bail out if channel not found */
3992                 nla_for_each_nested(attr,
3993                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3994                                     tmp) {
3995                         struct ieee80211_channel *chan;
3996
3997                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3998
3999                         if (!chan) {
4000                                 err = -EINVAL;
4001                                 goto out_free;
4002                         }
4003
4004                         /* ignore disabled channels */
4005                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4006                                 continue;
4007
4008                         request->channels[i] = chan;
4009                         i++;
4010                 }
4011         } else {
4012                 /* all channels */
4013                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4014                         int j;
4015                         if (!wiphy->bands[band])
4016                                 continue;
4017                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4018                                 struct ieee80211_channel *chan;
4019
4020                                 chan = &wiphy->bands[band]->channels[j];
4021
4022                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4023                                         continue;
4024
4025                                 request->channels[i] = chan;
4026                                 i++;
4027                         }
4028                 }
4029         }
4030
4031         if (!i) {
4032                 err = -EINVAL;
4033                 goto out_free;
4034         }
4035
4036         request->n_channels = i;
4037
4038         i = 0;
4039         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4040                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4041                                     tmp) {
4042                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4043                                 err = -EINVAL;
4044                                 goto out_free;
4045                         }
4046                         request->ssids[i].ssid_len = nla_len(attr);
4047                         memcpy(request->ssids[i].ssid, nla_data(attr),
4048                                nla_len(attr));
4049                         i++;
4050                 }
4051         }
4052
4053         i = 0;
4054         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4055                 nla_for_each_nested(attr,
4056                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4057                                     tmp) {
4058                         struct nlattr *ssid;
4059
4060                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4061                                   nla_data(attr), nla_len(attr),
4062                                   nl80211_match_policy);
4063                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4064                         if (ssid) {
4065                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4066                                         err = -EINVAL;
4067                                         goto out_free;
4068                                 }
4069                                 memcpy(request->match_sets[i].ssid.ssid,
4070                                        nla_data(ssid), nla_len(ssid));
4071                                 request->match_sets[i].ssid.ssid_len =
4072                                         nla_len(ssid);
4073                         }
4074                         i++;
4075                 }
4076         }
4077
4078         if (info->attrs[NL80211_ATTR_IE]) {
4079                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4080                 memcpy((void *)request->ie,
4081                        nla_data(info->attrs[NL80211_ATTR_IE]),
4082                        request->ie_len);
4083         }
4084
4085         request->dev = dev;
4086         request->wiphy = &rdev->wiphy;
4087         request->interval = interval;
4088
4089         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4090         if (!err) {
4091                 rdev->sched_scan_req = request;
4092                 nl80211_send_sched_scan(rdev, dev,
4093                                         NL80211_CMD_START_SCHED_SCAN);
4094                 goto out;
4095         }
4096
4097 out_free:
4098         kfree(request);
4099 out:
4100         mutex_unlock(&rdev->sched_scan_mtx);
4101         return err;
4102 }
4103
4104 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4105                                    struct genl_info *info)
4106 {
4107         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4108         int err;
4109
4110         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4111             !rdev->ops->sched_scan_stop)
4112                 return -EOPNOTSUPP;
4113
4114         mutex_lock(&rdev->sched_scan_mtx);
4115         err = __cfg80211_stop_sched_scan(rdev, false);
4116         mutex_unlock(&rdev->sched_scan_mtx);
4117
4118         return err;
4119 }
4120
4121 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4122                             u32 seq, int flags,
4123                             struct cfg80211_registered_device *rdev,
4124                             struct wireless_dev *wdev,
4125                             struct cfg80211_internal_bss *intbss)
4126 {
4127         struct cfg80211_bss *res = &intbss->pub;
4128         void *hdr;
4129         struct nlattr *bss;
4130
4131         ASSERT_WDEV_LOCK(wdev);
4132
4133         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4134                              NL80211_CMD_NEW_SCAN_RESULTS);
4135         if (!hdr)
4136                 return -1;
4137
4138         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4139
4140         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
4141         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
4142
4143         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4144         if (!bss)
4145                 goto nla_put_failure;
4146         if (!is_zero_ether_addr(res->bssid))
4147                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
4148         if (res->information_elements && res->len_information_elements)
4149                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4150                         res->len_information_elements,
4151                         res->information_elements);
4152         if (res->beacon_ies && res->len_beacon_ies &&
4153             res->beacon_ies != res->information_elements)
4154                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
4155                         res->len_beacon_ies, res->beacon_ies);
4156         if (res->tsf)
4157                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
4158         if (res->beacon_interval)
4159                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
4160         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
4161         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
4162         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
4163                 jiffies_to_msecs(jiffies - intbss->ts));
4164
4165         switch (rdev->wiphy.signal_type) {
4166         case CFG80211_SIGNAL_TYPE_MBM:
4167                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
4168                 break;
4169         case CFG80211_SIGNAL_TYPE_UNSPEC:
4170                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
4171                 break;
4172         default:
4173                 break;
4174         }
4175
4176         switch (wdev->iftype) {
4177         case NL80211_IFTYPE_P2P_CLIENT:
4178         case NL80211_IFTYPE_STATION:
4179                 if (intbss == wdev->current_bss)
4180                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4181                                     NL80211_BSS_STATUS_ASSOCIATED);
4182                 break;
4183         case NL80211_IFTYPE_ADHOC:
4184                 if (intbss == wdev->current_bss)
4185                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4186                                     NL80211_BSS_STATUS_IBSS_JOINED);
4187                 break;
4188         default:
4189                 break;
4190         }
4191
4192         nla_nest_end(msg, bss);
4193
4194         return genlmsg_end(msg, hdr);
4195
4196  nla_put_failure:
4197         genlmsg_cancel(msg, hdr);
4198         return -EMSGSIZE;
4199 }
4200
4201 static int nl80211_dump_scan(struct sk_buff *skb,
4202                              struct netlink_callback *cb)
4203 {
4204         struct cfg80211_registered_device *rdev;
4205         struct net_device *dev;
4206         struct cfg80211_internal_bss *scan;
4207         struct wireless_dev *wdev;
4208         int start = cb->args[1], idx = 0;
4209         int err;
4210
4211         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4212         if (err)
4213                 return err;
4214
4215         wdev = dev->ieee80211_ptr;
4216
4217         wdev_lock(wdev);
4218         spin_lock_bh(&rdev->bss_lock);
4219         cfg80211_bss_expire(rdev);
4220
4221         cb->seq = rdev->bss_generation;
4222
4223         list_for_each_entry(scan, &rdev->bss_list, list) {
4224                 if (++idx <= start)
4225                         continue;
4226                 if (nl80211_send_bss(skb, cb,
4227                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4228                                 rdev, wdev, scan) < 0) {
4229                         idx--;
4230                         break;
4231                 }
4232         }
4233
4234         spin_unlock_bh(&rdev->bss_lock);
4235         wdev_unlock(wdev);
4236
4237         cb->args[1] = idx;
4238         nl80211_finish_netdev_dump(rdev);
4239
4240         return skb->len;
4241 }
4242
4243 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4244                                 int flags, struct net_device *dev,
4245                                 struct survey_info *survey)
4246 {
4247         void *hdr;
4248         struct nlattr *infoattr;
4249
4250         hdr = nl80211hdr_put(msg, pid, seq, flags,
4251                              NL80211_CMD_NEW_SURVEY_RESULTS);
4252         if (!hdr)
4253                 return -ENOMEM;
4254
4255         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4256
4257         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4258         if (!infoattr)
4259                 goto nla_put_failure;
4260
4261         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4262                     survey->channel->center_freq);
4263         if (survey->filled & SURVEY_INFO_NOISE_DBM)
4264                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4265                             survey->noise);
4266         if (survey->filled & SURVEY_INFO_IN_USE)
4267                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4268         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4269                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4270                             survey->channel_time);
4271         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4272                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4273                             survey->channel_time_busy);
4274         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4275                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4276                             survey->channel_time_ext_busy);
4277         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4278                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4279                             survey->channel_time_rx);
4280         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4281                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4282                             survey->channel_time_tx);
4283
4284         nla_nest_end(msg, infoattr);
4285
4286         return genlmsg_end(msg, hdr);
4287
4288  nla_put_failure:
4289         genlmsg_cancel(msg, hdr);
4290         return -EMSGSIZE;
4291 }
4292
4293 static int nl80211_dump_survey(struct sk_buff *skb,
4294                         struct netlink_callback *cb)
4295 {
4296         struct survey_info survey;
4297         struct cfg80211_registered_device *dev;
4298         struct net_device *netdev;
4299         int survey_idx = cb->args[1];
4300         int res;
4301
4302         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4303         if (res)
4304                 return res;
4305
4306         if (!dev->ops->dump_survey) {
4307                 res = -EOPNOTSUPP;
4308                 goto out_err;
4309         }
4310
4311         while (1) {
4312                 struct ieee80211_channel *chan;
4313
4314                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4315                                             &survey);
4316                 if (res == -ENOENT)
4317                         break;
4318                 if (res)
4319                         goto out_err;
4320
4321                 /* Survey without a channel doesn't make sense */
4322                 if (!survey.channel) {
4323                         res = -EINVAL;
4324                         goto out;
4325                 }
4326
4327                 chan = ieee80211_get_channel(&dev->wiphy,
4328                                              survey.channel->center_freq);
4329                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4330                         survey_idx++;
4331                         continue;
4332                 }
4333
4334                 if (nl80211_send_survey(skb,
4335                                 NETLINK_CB(cb->skb).pid,
4336                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4337                                 netdev,
4338                                 &survey) < 0)
4339                         goto out;
4340                 survey_idx++;
4341         }
4342
4343  out:
4344         cb->args[1] = survey_idx;
4345         res = skb->len;
4346  out_err:
4347         nl80211_finish_netdev_dump(dev);
4348         return res;
4349 }
4350
4351 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4352 {
4353         return auth_type <= NL80211_AUTHTYPE_MAX;
4354 }
4355
4356 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4357 {
4358         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4359                                   NL80211_WPA_VERSION_2));
4360 }
4361
4362 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4363 {
4364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4365         struct net_device *dev = info->user_ptr[1];
4366         struct ieee80211_channel *chan;
4367         const u8 *bssid, *ssid, *ie = NULL;
4368         int err, ssid_len, ie_len = 0;
4369         enum nl80211_auth_type auth_type;
4370         struct key_parse key;
4371         bool local_state_change;
4372
4373         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4374                 return -EINVAL;
4375
4376         if (!info->attrs[NL80211_ATTR_MAC])
4377                 return -EINVAL;
4378
4379         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4380                 return -EINVAL;
4381
4382         if (!info->attrs[NL80211_ATTR_SSID])
4383                 return -EINVAL;
4384
4385         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4386                 return -EINVAL;
4387
4388         err = nl80211_parse_key(info, &key);
4389         if (err)
4390                 return err;
4391
4392         if (key.idx >= 0) {
4393                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4394                         return -EINVAL;
4395                 if (!key.p.key || !key.p.key_len)
4396                         return -EINVAL;
4397                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4398                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4399                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4400                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4401                         return -EINVAL;
4402                 if (key.idx > 4)
4403                         return -EINVAL;
4404         } else {
4405                 key.p.key_len = 0;
4406                 key.p.key = NULL;
4407         }
4408
4409         if (key.idx >= 0) {
4410                 int i;
4411                 bool ok = false;
4412                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4413                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4414                                 ok = true;
4415                                 break;
4416                         }
4417                 }
4418                 if (!ok)
4419                         return -EINVAL;
4420         }
4421
4422         if (!rdev->ops->auth)
4423                 return -EOPNOTSUPP;
4424
4425         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4426             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4427                 return -EOPNOTSUPP;
4428
4429         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4430         chan = ieee80211_get_channel(&rdev->wiphy,
4431                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4432         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4433                 return -EINVAL;
4434
4435         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4436         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4437
4438         if (info->attrs[NL80211_ATTR_IE]) {
4439                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4440                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4441         }
4442
4443         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4444         if (!nl80211_valid_auth_type(auth_type))
4445                 return -EINVAL;
4446
4447         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4448
4449         /*
4450          * Since we no longer track auth state, ignore
4451          * requests to only change local state.
4452          */
4453         if (local_state_change)
4454                 return 0;
4455
4456         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4457                                   ssid, ssid_len, ie, ie_len,
4458                                   key.p.key, key.p.key_len, key.idx);
4459 }
4460
4461 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4462                                    struct genl_info *info,
4463                                    struct cfg80211_crypto_settings *settings,
4464                                    int cipher_limit)
4465 {
4466         memset(settings, 0, sizeof(*settings));
4467
4468         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4469
4470         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4471                 u16 proto;
4472                 proto = nla_get_u16(
4473                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4474                 settings->control_port_ethertype = cpu_to_be16(proto);
4475                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4476                     proto != ETH_P_PAE)
4477                         return -EINVAL;
4478                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4479                         settings->control_port_no_encrypt = true;
4480         } else
4481                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4482
4483         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4484                 void *data;
4485                 int len, i;
4486
4487                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4488                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4489                 settings->n_ciphers_pairwise = len / sizeof(u32);
4490
4491                 if (len % sizeof(u32))
4492                         return -EINVAL;
4493
4494                 if (settings->n_ciphers_pairwise > cipher_limit)
4495                         return -EINVAL;
4496
4497                 memcpy(settings->ciphers_pairwise, data, len);
4498
4499                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4500                         if (!cfg80211_supported_cipher_suite(
4501                                         &rdev->wiphy,
4502                                         settings->ciphers_pairwise[i]))
4503                                 return -EINVAL;
4504         }
4505
4506         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4507                 settings->cipher_group =
4508                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4509                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4510                                                      settings->cipher_group))
4511                         return -EINVAL;
4512         }
4513
4514         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4515                 settings->wpa_versions =
4516                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4517                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4518                         return -EINVAL;
4519         }
4520
4521         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4522                 void *data;
4523                 int len;
4524
4525                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4526                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4527                 settings->n_akm_suites = len / sizeof(u32);
4528
4529                 if (len % sizeof(u32))
4530                         return -EINVAL;
4531
4532                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4533                         return -EINVAL;
4534
4535                 memcpy(settings->akm_suites, data, len);
4536         }
4537
4538         return 0;
4539 }
4540
4541 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4542 {
4543         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4544         struct net_device *dev = info->user_ptr[1];
4545         struct cfg80211_crypto_settings crypto;
4546         struct ieee80211_channel *chan;
4547         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4548         int err, ssid_len, ie_len = 0;
4549         bool use_mfp = false;
4550         u32 flags = 0;
4551         struct ieee80211_ht_cap *ht_capa = NULL;
4552         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4553
4554         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4555                 return -EINVAL;
4556
4557         if (!info->attrs[NL80211_ATTR_MAC] ||
4558             !info->attrs[NL80211_ATTR_SSID] ||
4559             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4560                 return -EINVAL;
4561
4562         if (!rdev->ops->assoc)
4563                 return -EOPNOTSUPP;
4564
4565         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4566             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4567                 return -EOPNOTSUPP;
4568
4569         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4570
4571         chan = ieee80211_get_channel(&rdev->wiphy,
4572                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4573         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4574                 return -EINVAL;
4575
4576         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4577         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4578
4579         if (info->attrs[NL80211_ATTR_IE]) {
4580                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4581                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4582         }
4583
4584         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4585                 enum nl80211_mfp mfp =
4586                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4587                 if (mfp == NL80211_MFP_REQUIRED)
4588                         use_mfp = true;
4589                 else if (mfp != NL80211_MFP_NO)
4590                         return -EINVAL;
4591         }
4592
4593         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4594                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4595
4596         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4597                 flags |= ASSOC_REQ_DISABLE_HT;
4598
4599         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4600                 ht_capa_mask =
4601                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4602
4603         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4604                 if (!ht_capa_mask)
4605                         return -EINVAL;
4606                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4607         }
4608
4609         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4610         if (!err)
4611                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4612                                           ssid, ssid_len, ie, ie_len, use_mfp,
4613                                           &crypto, flags, ht_capa,
4614                                           ht_capa_mask);
4615
4616         return err;
4617 }
4618
4619 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4620 {
4621         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4622         struct net_device *dev = info->user_ptr[1];
4623         const u8 *ie = NULL, *bssid;
4624         int ie_len = 0;
4625         u16 reason_code;
4626         bool local_state_change;
4627
4628         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4629                 return -EINVAL;
4630
4631         if (!info->attrs[NL80211_ATTR_MAC])
4632                 return -EINVAL;
4633
4634         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4635                 return -EINVAL;
4636
4637         if (!rdev->ops->deauth)
4638                 return -EOPNOTSUPP;
4639
4640         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4641             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4642                 return -EOPNOTSUPP;
4643
4644         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4645
4646         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4647         if (reason_code == 0) {
4648                 /* Reason Code 0 is reserved */
4649                 return -EINVAL;
4650         }
4651
4652         if (info->attrs[NL80211_ATTR_IE]) {
4653                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4654                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4655         }
4656
4657         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4658
4659         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4660                                     local_state_change);
4661 }
4662
4663 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4664 {
4665         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4666         struct net_device *dev = info->user_ptr[1];
4667         const u8 *ie = NULL, *bssid;
4668         int ie_len = 0;
4669         u16 reason_code;
4670         bool local_state_change;
4671
4672         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4673                 return -EINVAL;
4674
4675         if (!info->attrs[NL80211_ATTR_MAC])
4676                 return -EINVAL;
4677
4678         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4679                 return -EINVAL;
4680
4681         if (!rdev->ops->disassoc)
4682                 return -EOPNOTSUPP;
4683
4684         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4685             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4686                 return -EOPNOTSUPP;
4687
4688         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4689
4690         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4691         if (reason_code == 0) {
4692                 /* Reason Code 0 is reserved */
4693                 return -EINVAL;
4694         }
4695
4696         if (info->attrs[NL80211_ATTR_IE]) {
4697                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4698                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4699         }
4700
4701         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4702
4703         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4704                                       local_state_change);
4705 }
4706
4707 static bool
4708 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4709                          int mcast_rate[IEEE80211_NUM_BANDS],
4710                          int rateval)
4711 {
4712         struct wiphy *wiphy = &rdev->wiphy;
4713         bool found = false;
4714         int band, i;
4715
4716         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4717                 struct ieee80211_supported_band *sband;
4718
4719                 sband = wiphy->bands[band];
4720                 if (!sband)
4721                         continue;
4722
4723                 for (i = 0; i < sband->n_bitrates; i++) {
4724                         if (sband->bitrates[i].bitrate == rateval) {
4725                                 mcast_rate[band] = i + 1;
4726                                 found = true;
4727                                 break;
4728                         }
4729                 }
4730         }
4731
4732         return found;
4733 }
4734
4735 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4736 {
4737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4738         struct net_device *dev = info->user_ptr[1];
4739         struct cfg80211_ibss_params ibss;
4740         struct wiphy *wiphy;
4741         struct cfg80211_cached_keys *connkeys = NULL;
4742         int err;
4743
4744         memset(&ibss, 0, sizeof(ibss));
4745
4746         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4747                 return -EINVAL;
4748
4749         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4750             !info->attrs[NL80211_ATTR_SSID] ||
4751             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4752                 return -EINVAL;
4753
4754         ibss.beacon_interval = 100;
4755
4756         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4757                 ibss.beacon_interval =
4758                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4759                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4760                         return -EINVAL;
4761         }
4762
4763         if (!rdev->ops->join_ibss)
4764                 return -EOPNOTSUPP;
4765
4766         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4767                 return -EOPNOTSUPP;
4768
4769         wiphy = &rdev->wiphy;
4770
4771         if (info->attrs[NL80211_ATTR_MAC]) {
4772                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4773
4774                 if (!is_valid_ether_addr(ibss.bssid))
4775                         return -EINVAL;
4776         }
4777         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4778         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4779
4780         if (info->attrs[NL80211_ATTR_IE]) {
4781                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4782                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4783         }
4784
4785         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4786                 enum nl80211_channel_type channel_type;
4787
4788                 channel_type = nla_get_u32(
4789                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4790                 if (channel_type != NL80211_CHAN_NO_HT &&
4791                     channel_type != NL80211_CHAN_HT20 &&
4792                     channel_type != NL80211_CHAN_HT40MINUS &&
4793                     channel_type != NL80211_CHAN_HT40PLUS)
4794                         return -EINVAL;
4795
4796                 if (channel_type != NL80211_CHAN_NO_HT &&
4797                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4798                         return -EINVAL;
4799
4800                 ibss.channel_type = channel_type;
4801         } else {
4802                 ibss.channel_type = NL80211_CHAN_NO_HT;
4803         }
4804
4805         ibss.channel = rdev_freq_to_chan(rdev,
4806                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4807                 ibss.channel_type);
4808         if (!ibss.channel ||
4809             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4810             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4811                 return -EINVAL;
4812
4813         /* Both channels should be able to initiate communication */
4814         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4815              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4816             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4817                                           ibss.channel_type))
4818                 return -EINVAL;
4819
4820         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4821         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4822
4823         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4824                 u8 *rates =
4825                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4826                 int n_rates =
4827                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4828                 struct ieee80211_supported_band *sband =
4829                         wiphy->bands[ibss.channel->band];
4830
4831                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4832                                              &ibss.basic_rates);
4833                 if (err)
4834                         return err;
4835         }
4836
4837         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4838             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4839                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4840                 return -EINVAL;
4841
4842         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4843                 connkeys = nl80211_parse_connkeys(rdev,
4844                                         info->attrs[NL80211_ATTR_KEYS]);
4845                 if (IS_ERR(connkeys))
4846                         return PTR_ERR(connkeys);
4847         }
4848
4849         ibss.control_port =
4850                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4851
4852         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4853         if (err)
4854                 kfree(connkeys);
4855         return err;
4856 }
4857
4858 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4859 {
4860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4861         struct net_device *dev = info->user_ptr[1];
4862
4863         if (!rdev->ops->leave_ibss)
4864                 return -EOPNOTSUPP;
4865
4866         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4867                 return -EOPNOTSUPP;
4868
4869         return cfg80211_leave_ibss(rdev, dev, false);
4870 }
4871
4872 #ifdef CONFIG_NL80211_TESTMODE
4873 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4874         .name = "testmode",
4875 };
4876
4877 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4878 {
4879         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4880         int err;
4881
4882         if (!info->attrs[NL80211_ATTR_TESTDATA])
4883                 return -EINVAL;
4884
4885         err = -EOPNOTSUPP;
4886         if (rdev->ops->testmode_cmd) {
4887                 rdev->testmode_info = info;
4888                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4889                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4890                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4891                 rdev->testmode_info = NULL;
4892         }
4893
4894         return err;
4895 }
4896
4897 static int nl80211_testmode_dump(struct sk_buff *skb,
4898                                  struct netlink_callback *cb)
4899 {
4900         struct cfg80211_registered_device *rdev;
4901         int err;
4902         long phy_idx;
4903         void *data = NULL;
4904         int data_len = 0;
4905
4906         if (cb->args[0]) {
4907                 /*
4908                  * 0 is a valid index, but not valid for args[0],
4909                  * so we need to offset by 1.
4910                  */
4911                 phy_idx = cb->args[0] - 1;
4912         } else {
4913                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4914                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4915                                   nl80211_policy);
4916                 if (err)
4917                         return err;
4918                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
4919                         phy_idx = nla_get_u32(
4920                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4921                 } else {
4922                         struct net_device *netdev;
4923
4924                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
4925                                                       nl80211_fam.attrbuf,
4926                                                       &rdev, &netdev);
4927                         if (err)
4928                                 return err;
4929                         dev_put(netdev);
4930                         phy_idx = rdev->wiphy_idx;
4931                         cfg80211_unlock_rdev(rdev);
4932                 }
4933                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4934                         cb->args[1] =
4935                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4936         }
4937
4938         if (cb->args[1]) {
4939                 data = nla_data((void *)cb->args[1]);
4940                 data_len = nla_len((void *)cb->args[1]);
4941         }
4942
4943         mutex_lock(&cfg80211_mutex);
4944         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4945         if (!rdev) {
4946                 mutex_unlock(&cfg80211_mutex);
4947                 return -ENOENT;
4948         }
4949         cfg80211_lock_rdev(rdev);
4950         mutex_unlock(&cfg80211_mutex);
4951
4952         if (!rdev->ops->testmode_dump) {
4953                 err = -EOPNOTSUPP;
4954                 goto out_err;
4955         }
4956
4957         while (1) {
4958                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4959                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4960                                            NL80211_CMD_TESTMODE);
4961                 struct nlattr *tmdata;
4962
4963                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx) < 0) {
4964                         genlmsg_cancel(skb, hdr);
4965                         break;
4966                 }
4967
4968                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4969                 if (!tmdata) {
4970                         genlmsg_cancel(skb, hdr);
4971                         break;
4972                 }
4973                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
4974                                                data, data_len);
4975                 nla_nest_end(skb, tmdata);
4976
4977                 if (err == -ENOBUFS || err == -ENOENT) {
4978                         genlmsg_cancel(skb, hdr);
4979                         break;
4980                 } else if (err) {
4981                         genlmsg_cancel(skb, hdr);
4982                         goto out_err;
4983                 }
4984
4985                 genlmsg_end(skb, hdr);
4986         }
4987
4988         err = skb->len;
4989         /* see above */
4990         cb->args[0] = phy_idx + 1;
4991  out_err:
4992         cfg80211_unlock_rdev(rdev);
4993         return err;
4994 }
4995
4996 static struct sk_buff *
4997 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4998                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4999 {
5000         struct sk_buff *skb;
5001         void *hdr;
5002         struct nlattr *data;
5003
5004         skb = nlmsg_new(approxlen + 100, gfp);
5005         if (!skb)
5006                 return NULL;
5007
5008         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5009         if (!hdr) {
5010                 kfree_skb(skb);
5011                 return NULL;
5012         }
5013
5014         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5015         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5016
5017         ((void **)skb->cb)[0] = rdev;
5018         ((void **)skb->cb)[1] = hdr;
5019         ((void **)skb->cb)[2] = data;
5020
5021         return skb;
5022
5023  nla_put_failure:
5024         kfree_skb(skb);
5025         return NULL;
5026 }
5027
5028 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5029                                                   int approxlen)
5030 {
5031         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5032
5033         if (WARN_ON(!rdev->testmode_info))
5034                 return NULL;
5035
5036         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5037                                 rdev->testmode_info->snd_pid,
5038                                 rdev->testmode_info->snd_seq,
5039                                 GFP_KERNEL);
5040 }
5041 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5042
5043 int cfg80211_testmode_reply(struct sk_buff *skb)
5044 {
5045         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5046         void *hdr = ((void **)skb->cb)[1];
5047         struct nlattr *data = ((void **)skb->cb)[2];
5048
5049         if (WARN_ON(!rdev->testmode_info)) {
5050                 kfree_skb(skb);
5051                 return -EINVAL;
5052         }
5053
5054         nla_nest_end(skb, data);
5055         genlmsg_end(skb, hdr);
5056         return genlmsg_reply(skb, rdev->testmode_info);
5057 }
5058 EXPORT_SYMBOL(cfg80211_testmode_reply);
5059
5060 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5061                                                   int approxlen, gfp_t gfp)
5062 {
5063         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5064
5065         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5066 }
5067 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5068
5069 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5070 {
5071         void *hdr = ((void **)skb->cb)[1];
5072         struct nlattr *data = ((void **)skb->cb)[2];
5073
5074         nla_nest_end(skb, data);
5075         genlmsg_end(skb, hdr);
5076         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5077 }
5078 EXPORT_SYMBOL(cfg80211_testmode_event);
5079 #endif
5080
5081 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5082 {
5083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5084         struct net_device *dev = info->user_ptr[1];
5085         struct cfg80211_connect_params connect;
5086         struct wiphy *wiphy;
5087         struct cfg80211_cached_keys *connkeys = NULL;
5088         int err;
5089
5090         memset(&connect, 0, sizeof(connect));
5091
5092         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5093                 return -EINVAL;
5094
5095         if (!info->attrs[NL80211_ATTR_SSID] ||
5096             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5097                 return -EINVAL;
5098
5099         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5100                 connect.auth_type =
5101                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5102                 if (!nl80211_valid_auth_type(connect.auth_type))
5103                         return -EINVAL;
5104         } else
5105                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5106
5107         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5108
5109         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5110                                       NL80211_MAX_NR_CIPHER_SUITES);
5111         if (err)
5112                 return err;
5113
5114         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5115             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5116                 return -EOPNOTSUPP;
5117
5118         wiphy = &rdev->wiphy;
5119
5120         connect.bg_scan_period = -1;
5121         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5122                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5123                 connect.bg_scan_period =
5124                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5125         }
5126
5127         if (info->attrs[NL80211_ATTR_MAC])
5128                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5129         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5130         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5131
5132         if (info->attrs[NL80211_ATTR_IE]) {
5133                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5134                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5135         }
5136
5137         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5138                 connect.channel =
5139                         ieee80211_get_channel(wiphy,
5140                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5141                 if (!connect.channel ||
5142                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5143                         return -EINVAL;
5144         }
5145
5146         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5147                 connkeys = nl80211_parse_connkeys(rdev,
5148                                         info->attrs[NL80211_ATTR_KEYS]);
5149                 if (IS_ERR(connkeys))
5150                         return PTR_ERR(connkeys);
5151         }
5152
5153         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5154                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5155
5156         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5157                 memcpy(&connect.ht_capa_mask,
5158                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5159                        sizeof(connect.ht_capa_mask));
5160
5161         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5162                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5163                         return -EINVAL;
5164                 memcpy(&connect.ht_capa,
5165                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5166                        sizeof(connect.ht_capa));
5167         }
5168
5169         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5170         if (err)
5171                 kfree(connkeys);
5172         return err;
5173 }
5174
5175 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5176 {
5177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5178         struct net_device *dev = info->user_ptr[1];
5179         u16 reason;
5180
5181         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5182                 reason = WLAN_REASON_DEAUTH_LEAVING;
5183         else
5184                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5185
5186         if (reason == 0)
5187                 return -EINVAL;
5188
5189         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5190             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5191                 return -EOPNOTSUPP;
5192
5193         return cfg80211_disconnect(rdev, dev, reason, true);
5194 }
5195
5196 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5197 {
5198         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5199         struct net *net;
5200         int err;
5201         u32 pid;
5202
5203         if (!info->attrs[NL80211_ATTR_PID])
5204                 return -EINVAL;
5205
5206         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5207
5208         net = get_net_ns_by_pid(pid);
5209         if (IS_ERR(net))
5210                 return PTR_ERR(net);
5211
5212         err = 0;
5213
5214         /* check if anything to do */
5215         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5216                 err = cfg80211_switch_netns(rdev, net);
5217
5218         put_net(net);
5219         return err;
5220 }
5221
5222 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5223 {
5224         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5225         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5226                         struct cfg80211_pmksa *pmksa) = NULL;
5227         struct net_device *dev = info->user_ptr[1];
5228         struct cfg80211_pmksa pmksa;
5229
5230         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5231
5232         if (!info->attrs[NL80211_ATTR_MAC])
5233                 return -EINVAL;
5234
5235         if (!info->attrs[NL80211_ATTR_PMKID])
5236                 return -EINVAL;
5237
5238         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5239         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5240
5241         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5242             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5243                 return -EOPNOTSUPP;
5244
5245         switch (info->genlhdr->cmd) {
5246         case NL80211_CMD_SET_PMKSA:
5247                 rdev_ops = rdev->ops->set_pmksa;
5248                 break;
5249         case NL80211_CMD_DEL_PMKSA:
5250                 rdev_ops = rdev->ops->del_pmksa;
5251                 break;
5252         default:
5253                 WARN_ON(1);
5254                 break;
5255         }
5256
5257         if (!rdev_ops)
5258                 return -EOPNOTSUPP;
5259
5260         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5261 }
5262
5263 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5264 {
5265         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5266         struct net_device *dev = info->user_ptr[1];
5267
5268         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5269             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5270                 return -EOPNOTSUPP;
5271
5272         if (!rdev->ops->flush_pmksa)
5273                 return -EOPNOTSUPP;
5274
5275         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5276 }
5277
5278 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5279 {
5280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5281         struct net_device *dev = info->user_ptr[1];
5282         u8 action_code, dialog_token;
5283         u16 status_code;
5284         u8 *peer;
5285
5286         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5287             !rdev->ops->tdls_mgmt)
5288                 return -EOPNOTSUPP;
5289
5290         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5291             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5292             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5293             !info->attrs[NL80211_ATTR_IE] ||
5294             !info->attrs[NL80211_ATTR_MAC])
5295                 return -EINVAL;
5296
5297         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5298         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5299         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5300         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5301
5302         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5303                                     dialog_token, status_code,
5304                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5305                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5306 }
5307
5308 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5309 {
5310         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5311         struct net_device *dev = info->user_ptr[1];
5312         enum nl80211_tdls_operation operation;
5313         u8 *peer;
5314
5315         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5316             !rdev->ops->tdls_oper)
5317                 return -EOPNOTSUPP;
5318
5319         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5320             !info->attrs[NL80211_ATTR_MAC])
5321                 return -EINVAL;
5322
5323         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5324         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5325
5326         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5327 }
5328
5329 static int nl80211_remain_on_channel(struct sk_buff *skb,
5330                                      struct genl_info *info)
5331 {
5332         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5333         struct net_device *dev = info->user_ptr[1];
5334         struct ieee80211_channel *chan;
5335         struct sk_buff *msg;
5336         void *hdr;
5337         u64 cookie;
5338         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5339         u32 freq, duration;
5340         int err;
5341
5342         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5343             !info->attrs[NL80211_ATTR_DURATION])
5344                 return -EINVAL;
5345
5346         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5347
5348         /*
5349          * We should be on that channel for at least one jiffie,
5350          * and more than 5 seconds seems excessive.
5351          */
5352         if (!duration || !msecs_to_jiffies(duration) ||
5353             duration > rdev->wiphy.max_remain_on_channel_duration)
5354                 return -EINVAL;
5355
5356         if (!rdev->ops->remain_on_channel ||
5357             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5358                 return -EOPNOTSUPP;
5359
5360         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5361                 channel_type = nla_get_u32(
5362                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5363                 if (channel_type != NL80211_CHAN_NO_HT &&
5364                     channel_type != NL80211_CHAN_HT20 &&
5365                     channel_type != NL80211_CHAN_HT40PLUS &&
5366                     channel_type != NL80211_CHAN_HT40MINUS)
5367                         return -EINVAL;
5368         }
5369
5370         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5371         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5372         if (chan == NULL)
5373                 return -EINVAL;
5374
5375         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5376         if (!msg)
5377                 return -ENOMEM;
5378
5379         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5380                              NL80211_CMD_REMAIN_ON_CHANNEL);
5381
5382         if (IS_ERR(hdr)) {
5383                 err = PTR_ERR(hdr);
5384                 goto free_msg;
5385         }
5386
5387         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5388                                            channel_type, duration, &cookie);
5389
5390         if (err)
5391                 goto free_msg;
5392
5393         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5394
5395         genlmsg_end(msg, hdr);
5396
5397         return genlmsg_reply(msg, info);
5398
5399  nla_put_failure:
5400         err = -ENOBUFS;
5401  free_msg:
5402         nlmsg_free(msg);
5403         return err;
5404 }
5405
5406 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5407                                             struct genl_info *info)
5408 {
5409         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5410         struct net_device *dev = info->user_ptr[1];
5411         u64 cookie;
5412
5413         if (!info->attrs[NL80211_ATTR_COOKIE])
5414                 return -EINVAL;
5415
5416         if (!rdev->ops->cancel_remain_on_channel)
5417                 return -EOPNOTSUPP;
5418
5419         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5420
5421         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5422 }
5423
5424 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5425                            u8 *rates, u8 rates_len)
5426 {
5427         u8 i;
5428         u32 mask = 0;
5429
5430         for (i = 0; i < rates_len; i++) {
5431                 int rate = (rates[i] & 0x7f) * 5;
5432                 int ridx;
5433                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5434                         struct ieee80211_rate *srate =
5435                                 &sband->bitrates[ridx];
5436                         if (rate == srate->bitrate) {
5437                                 mask |= 1 << ridx;
5438                                 break;
5439                         }
5440                 }
5441                 if (ridx == sband->n_bitrates)
5442                         return 0; /* rate not found */
5443         }
5444
5445         return mask;
5446 }
5447
5448 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5449                                u8 *rates, u8 rates_len,
5450                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5451 {
5452         u8 i;
5453
5454         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5455
5456         for (i = 0; i < rates_len; i++) {
5457                 int ridx, rbit;
5458
5459                 ridx = rates[i] / 8;
5460                 rbit = BIT(rates[i] % 8);
5461
5462                 /* check validity */
5463                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5464                         return false;
5465
5466                 /* check availability */
5467                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5468                         mcs[ridx] |= rbit;
5469                 else
5470                         return false;
5471         }
5472
5473         return true;
5474 }
5475
5476 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5477         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5478                                     .len = NL80211_MAX_SUPP_RATES },
5479         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5480                                  .len = NL80211_MAX_SUPP_HT_RATES },
5481 };
5482
5483 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5484                                        struct genl_info *info)
5485 {
5486         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5488         struct cfg80211_bitrate_mask mask;
5489         int rem, i;
5490         struct net_device *dev = info->user_ptr[1];
5491         struct nlattr *tx_rates;
5492         struct ieee80211_supported_band *sband;
5493
5494         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5495                 return -EINVAL;
5496
5497         if (!rdev->ops->set_bitrate_mask)
5498                 return -EOPNOTSUPP;
5499
5500         memset(&mask, 0, sizeof(mask));
5501         /* Default to all rates enabled */
5502         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5503                 sband = rdev->wiphy.bands[i];
5504                 mask.control[i].legacy =
5505                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5506                 if (sband)
5507                         memcpy(mask.control[i].mcs,
5508                                sband->ht_cap.mcs.rx_mask,
5509                                sizeof(mask.control[i].mcs));
5510                 else
5511                         memset(mask.control[i].mcs, 0,
5512                                sizeof(mask.control[i].mcs));
5513         }
5514
5515         /*
5516          * The nested attribute uses enum nl80211_band as the index. This maps
5517          * directly to the enum ieee80211_band values used in cfg80211.
5518          */
5519         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5520         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5521         {
5522                 enum ieee80211_band band = nla_type(tx_rates);
5523                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5524                         return -EINVAL;
5525                 sband = rdev->wiphy.bands[band];
5526                 if (sband == NULL)
5527                         return -EINVAL;
5528                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5529                           nla_len(tx_rates), nl80211_txattr_policy);
5530                 if (tb[NL80211_TXRATE_LEGACY]) {
5531                         mask.control[band].legacy = rateset_to_mask(
5532                                 sband,
5533                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5534                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5535                 }
5536                 if (tb[NL80211_TXRATE_MCS]) {
5537                         if (!ht_rateset_to_mask(
5538                                         sband,
5539                                         nla_data(tb[NL80211_TXRATE_MCS]),
5540                                         nla_len(tb[NL80211_TXRATE_MCS]),
5541                                         mask.control[band].mcs))
5542                                 return -EINVAL;
5543                 }
5544
5545                 if (mask.control[band].legacy == 0) {
5546                         /* don't allow empty legacy rates if HT
5547                          * is not even supported. */
5548                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5549                                 return -EINVAL;
5550
5551                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5552                                 if (mask.control[band].mcs[i])
5553                                         break;
5554
5555                         /* legacy and mcs rates may not be both empty */
5556                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5557                                 return -EINVAL;
5558                 }
5559         }
5560
5561         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5562 }
5563
5564 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5565 {
5566         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5567         struct net_device *dev = info->user_ptr[1];
5568         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5569
5570         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5571                 return -EINVAL;
5572
5573         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5574                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5575
5576         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5577             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5578             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5579             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5580             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5581             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5582             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5583                 return -EOPNOTSUPP;
5584
5585         /* not much point in registering if we can't reply */
5586         if (!rdev->ops->mgmt_tx)
5587                 return -EOPNOTSUPP;
5588
5589         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5590                         frame_type,
5591                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5592                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5593 }
5594
5595 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5596 {
5597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5598         struct net_device *dev = info->user_ptr[1];
5599         struct ieee80211_channel *chan;
5600         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5601         bool channel_type_valid = false;
5602         u32 freq;
5603         int err;
5604         void *hdr = NULL;
5605         u64 cookie;
5606         struct sk_buff *msg = NULL;
5607         unsigned int wait = 0;
5608         bool offchan, no_cck, dont_wait_for_ack;
5609
5610         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5611
5612         if (!info->attrs[NL80211_ATTR_FRAME] ||
5613             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5614                 return -EINVAL;
5615
5616         if (!rdev->ops->mgmt_tx)
5617                 return -EOPNOTSUPP;
5618
5619         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5620             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5621             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5622             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5623             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5624             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5625             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5626                 return -EOPNOTSUPP;
5627
5628         if (info->attrs[NL80211_ATTR_DURATION]) {
5629                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5630                         return -EINVAL;
5631                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5632         }
5633
5634         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5635                 channel_type = nla_get_u32(
5636                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5637                 if (channel_type != NL80211_CHAN_NO_HT &&
5638                     channel_type != NL80211_CHAN_HT20 &&
5639                     channel_type != NL80211_CHAN_HT40PLUS &&
5640                     channel_type != NL80211_CHAN_HT40MINUS)
5641                         return -EINVAL;
5642                 channel_type_valid = true;
5643         }
5644
5645         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5646
5647         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5648                 return -EINVAL;
5649
5650         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5651
5652         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5653         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5654         if (chan == NULL)
5655                 return -EINVAL;
5656
5657         if (!dont_wait_for_ack) {
5658                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5659                 if (!msg)
5660                         return -ENOMEM;
5661
5662                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5663                                      NL80211_CMD_FRAME);
5664
5665                 if (IS_ERR(hdr)) {
5666                         err = PTR_ERR(hdr);
5667                         goto free_msg;
5668                 }
5669         }
5670
5671         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5672                                     channel_type_valid, wait,
5673                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5674                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5675                                     no_cck, dont_wait_for_ack, &cookie);
5676         if (err)
5677                 goto free_msg;
5678
5679         if (msg) {
5680                 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5681
5682                 genlmsg_end(msg, hdr);
5683                 return genlmsg_reply(msg, info);
5684         }
5685
5686         return 0;
5687
5688  nla_put_failure:
5689         err = -ENOBUFS;
5690  free_msg:
5691         nlmsg_free(msg);
5692         return err;
5693 }
5694
5695 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5696 {
5697         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5698         struct net_device *dev = info->user_ptr[1];
5699         u64 cookie;
5700
5701         if (!info->attrs[NL80211_ATTR_COOKIE])
5702                 return -EINVAL;
5703
5704         if (!rdev->ops->mgmt_tx_cancel_wait)
5705                 return -EOPNOTSUPP;
5706
5707         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5708             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5709             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5710             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5711             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5712             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5713                 return -EOPNOTSUPP;
5714
5715         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5716
5717         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5718 }
5719
5720 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5721 {
5722         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5723         struct wireless_dev *wdev;
5724         struct net_device *dev = info->user_ptr[1];
5725         u8 ps_state;
5726         bool state;
5727         int err;
5728
5729         if (!info->attrs[NL80211_ATTR_PS_STATE])
5730                 return -EINVAL;
5731
5732         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5733
5734         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5735                 return -EINVAL;
5736
5737         wdev = dev->ieee80211_ptr;
5738
5739         if (!rdev->ops->set_power_mgmt)
5740                 return -EOPNOTSUPP;
5741
5742         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5743
5744         if (state == wdev->ps)
5745                 return 0;
5746
5747         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5748                                         wdev->ps_timeout);
5749         if (!err)
5750                 wdev->ps = state;
5751         return err;
5752 }
5753
5754 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5755 {
5756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5757         enum nl80211_ps_state ps_state;
5758         struct wireless_dev *wdev;
5759         struct net_device *dev = info->user_ptr[1];
5760         struct sk_buff *msg;
5761         void *hdr;
5762         int err;
5763
5764         wdev = dev->ieee80211_ptr;
5765
5766         if (!rdev->ops->set_power_mgmt)
5767                 return -EOPNOTSUPP;
5768
5769         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5770         if (!msg)
5771                 return -ENOMEM;
5772
5773         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5774                              NL80211_CMD_GET_POWER_SAVE);
5775         if (!hdr) {
5776                 err = -ENOBUFS;
5777                 goto free_msg;
5778         }
5779
5780         if (wdev->ps)
5781                 ps_state = NL80211_PS_ENABLED;
5782         else
5783                 ps_state = NL80211_PS_DISABLED;
5784
5785         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5786
5787         genlmsg_end(msg, hdr);
5788         return genlmsg_reply(msg, info);
5789
5790  nla_put_failure:
5791         err = -ENOBUFS;
5792  free_msg:
5793         nlmsg_free(msg);
5794         return err;
5795 }
5796
5797 static struct nla_policy
5798 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5799         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5800         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5801         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5802 };
5803
5804 static int nl80211_set_cqm_rssi(struct genl_info *info,
5805                                 s32 threshold, u32 hysteresis)
5806 {
5807         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5808         struct wireless_dev *wdev;
5809         struct net_device *dev = info->user_ptr[1];
5810
5811         if (threshold > 0)
5812                 return -EINVAL;
5813
5814         wdev = dev->ieee80211_ptr;
5815
5816         if (!rdev->ops->set_cqm_rssi_config)
5817                 return -EOPNOTSUPP;
5818
5819         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5820             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5821                 return -EOPNOTSUPP;
5822
5823         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5824                                               threshold, hysteresis);
5825 }
5826
5827 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5828 {
5829         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5830         struct nlattr *cqm;
5831         int err;
5832
5833         cqm = info->attrs[NL80211_ATTR_CQM];
5834         if (!cqm) {
5835                 err = -EINVAL;
5836                 goto out;
5837         }
5838
5839         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5840                                nl80211_attr_cqm_policy);
5841         if (err)
5842                 goto out;
5843
5844         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5845             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5846                 s32 threshold;
5847                 u32 hysteresis;
5848                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5849                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5850                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5851         } else
5852                 err = -EINVAL;
5853
5854 out:
5855         return err;
5856 }
5857
5858 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5859 {
5860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5861         struct net_device *dev = info->user_ptr[1];
5862         struct mesh_config cfg;
5863         struct mesh_setup setup;
5864         int err;
5865
5866         /* start with default */
5867         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5868         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5869
5870         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5871                 /* and parse parameters if given */
5872                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5873                 if (err)
5874                         return err;
5875         }
5876
5877         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5878             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5879                 return -EINVAL;
5880
5881         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5882         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5883
5884         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5885             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
5886                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5887                         return -EINVAL;
5888
5889         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5890                 /* parse additional setup parameters if given */
5891                 err = nl80211_parse_mesh_setup(info, &setup);
5892                 if (err)
5893                         return err;
5894         }
5895
5896         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5897 }
5898
5899 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5900 {
5901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5902         struct net_device *dev = info->user_ptr[1];
5903
5904         return cfg80211_leave_mesh(rdev, dev);
5905 }
5906
5907 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5908 {
5909         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5910         struct sk_buff *msg;
5911         void *hdr;
5912
5913         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5914                 return -EOPNOTSUPP;
5915
5916         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5917         if (!msg)
5918                 return -ENOMEM;
5919
5920         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5921                              NL80211_CMD_GET_WOWLAN);
5922         if (!hdr)
5923                 goto nla_put_failure;
5924
5925         if (rdev->wowlan) {
5926                 struct nlattr *nl_wowlan;
5927
5928                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5929                 if (!nl_wowlan)
5930                         goto nla_put_failure;
5931
5932                 if (rdev->wowlan->any)
5933                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5934                 if (rdev->wowlan->disconnect)
5935                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5936                 if (rdev->wowlan->magic_pkt)
5937                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5938                 if (rdev->wowlan->gtk_rekey_failure)
5939                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5940                 if (rdev->wowlan->eap_identity_req)
5941                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
5942                 if (rdev->wowlan->four_way_handshake)
5943                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
5944                 if (rdev->wowlan->rfkill_release)
5945                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
5946                 if (rdev->wowlan->n_patterns) {
5947                         struct nlattr *nl_pats, *nl_pat;
5948                         int i, pat_len;
5949
5950                         nl_pats = nla_nest_start(msg,
5951                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5952                         if (!nl_pats)
5953                                 goto nla_put_failure;
5954
5955                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5956                                 nl_pat = nla_nest_start(msg, i + 1);
5957                                 if (!nl_pat)
5958                                         goto nla_put_failure;
5959                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5960                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5961                                         DIV_ROUND_UP(pat_len, 8),
5962                                         rdev->wowlan->patterns[i].mask);
5963                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5964                                         pat_len,
5965                                         rdev->wowlan->patterns[i].pattern);
5966                                 nla_nest_end(msg, nl_pat);
5967                         }
5968                         nla_nest_end(msg, nl_pats);
5969                 }
5970
5971                 nla_nest_end(msg, nl_wowlan);
5972         }
5973
5974         genlmsg_end(msg, hdr);
5975         return genlmsg_reply(msg, info);
5976
5977 nla_put_failure:
5978         nlmsg_free(msg);
5979         return -ENOBUFS;
5980 }
5981
5982 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5983 {
5984         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5985         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5986         struct cfg80211_wowlan no_triggers = {};
5987         struct cfg80211_wowlan new_triggers = {};
5988         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5989         int err, i;
5990
5991         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5992                 return -EOPNOTSUPP;
5993
5994         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5995                 goto no_triggers;
5996
5997         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5998                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5999                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6000                         nl80211_wowlan_policy);
6001         if (err)
6002                 return err;
6003
6004         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6005                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6006                         return -EINVAL;
6007                 new_triggers.any = true;
6008         }
6009
6010         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6011                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6012                         return -EINVAL;
6013                 new_triggers.disconnect = true;
6014         }
6015
6016         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6017                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6018                         return -EINVAL;
6019                 new_triggers.magic_pkt = true;
6020         }
6021
6022         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6023                 return -EINVAL;
6024
6025         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6026                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6027                         return -EINVAL;
6028                 new_triggers.gtk_rekey_failure = true;
6029         }
6030
6031         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6032                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6033                         return -EINVAL;
6034                 new_triggers.eap_identity_req = true;
6035         }
6036
6037         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6038                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6039                         return -EINVAL;
6040                 new_triggers.four_way_handshake = true;
6041         }
6042
6043         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6044                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6045                         return -EINVAL;
6046                 new_triggers.rfkill_release = true;
6047         }
6048
6049         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6050                 struct nlattr *pat;
6051                 int n_patterns = 0;
6052                 int rem, pat_len, mask_len;
6053                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6054
6055                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6056                                     rem)
6057                         n_patterns++;
6058                 if (n_patterns > wowlan->n_patterns)
6059                         return -EINVAL;
6060
6061                 new_triggers.patterns = kcalloc(n_patterns,
6062                                                 sizeof(new_triggers.patterns[0]),
6063                                                 GFP_KERNEL);
6064                 if (!new_triggers.patterns)
6065                         return -ENOMEM;
6066
6067                 new_triggers.n_patterns = n_patterns;
6068                 i = 0;
6069
6070                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6071                                     rem) {
6072                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6073                                   nla_data(pat), nla_len(pat), NULL);
6074                         err = -EINVAL;
6075                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6076                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6077                                 goto error;
6078                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6079                         mask_len = DIV_ROUND_UP(pat_len, 8);
6080                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6081                             mask_len)
6082                                 goto error;
6083                         if (pat_len > wowlan->pattern_max_len ||
6084                             pat_len < wowlan->pattern_min_len)
6085                                 goto error;
6086
6087                         new_triggers.patterns[i].mask =
6088                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6089                         if (!new_triggers.patterns[i].mask) {
6090                                 err = -ENOMEM;
6091                                 goto error;
6092                         }
6093                         new_triggers.patterns[i].pattern =
6094                                 new_triggers.patterns[i].mask + mask_len;
6095                         memcpy(new_triggers.patterns[i].mask,
6096                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6097                                mask_len);
6098                         new_triggers.patterns[i].pattern_len = pat_len;
6099                         memcpy(new_triggers.patterns[i].pattern,
6100                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6101                                pat_len);
6102                         i++;
6103                 }
6104         }
6105
6106         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6107                 struct cfg80211_wowlan *ntrig;
6108                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6109                                 GFP_KERNEL);
6110                 if (!ntrig) {
6111                         err = -ENOMEM;
6112                         goto error;
6113                 }
6114                 cfg80211_rdev_free_wowlan(rdev);
6115                 rdev->wowlan = ntrig;
6116         } else {
6117  no_triggers:
6118                 cfg80211_rdev_free_wowlan(rdev);
6119                 rdev->wowlan = NULL;
6120         }
6121
6122         return 0;
6123  error:
6124         for (i = 0; i < new_triggers.n_patterns; i++)
6125                 kfree(new_triggers.patterns[i].mask);
6126         kfree(new_triggers.patterns);
6127         return err;
6128 }
6129
6130 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6131 {
6132         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6133         struct net_device *dev = info->user_ptr[1];
6134         struct wireless_dev *wdev = dev->ieee80211_ptr;
6135         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6136         struct cfg80211_gtk_rekey_data rekey_data;
6137         int err;
6138
6139         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6140                 return -EINVAL;
6141
6142         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6143                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6144                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6145                         nl80211_rekey_policy);
6146         if (err)
6147                 return err;
6148
6149         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6150                 return -ERANGE;
6151         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6152                 return -ERANGE;
6153         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6154                 return -ERANGE;
6155
6156         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6157                NL80211_KEK_LEN);
6158         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6159                NL80211_KCK_LEN);
6160         memcpy(rekey_data.replay_ctr,
6161                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6162                NL80211_REPLAY_CTR_LEN);
6163
6164         wdev_lock(wdev);
6165         if (!wdev->current_bss) {
6166                 err = -ENOTCONN;
6167                 goto out;
6168         }
6169
6170         if (!rdev->ops->set_rekey_data) {
6171                 err = -EOPNOTSUPP;
6172                 goto out;
6173         }
6174
6175         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6176  out:
6177         wdev_unlock(wdev);
6178         return err;
6179 }
6180
6181 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6182                                              struct genl_info *info)
6183 {
6184         struct net_device *dev = info->user_ptr[1];
6185         struct wireless_dev *wdev = dev->ieee80211_ptr;
6186
6187         if (wdev->iftype != NL80211_IFTYPE_AP &&
6188             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6189                 return -EINVAL;
6190
6191         if (wdev->ap_unexpected_nlpid)
6192                 return -EBUSY;
6193
6194         wdev->ap_unexpected_nlpid = info->snd_pid;
6195         return 0;
6196 }
6197
6198 static int nl80211_probe_client(struct sk_buff *skb,
6199                                 struct genl_info *info)
6200 {
6201         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6202         struct net_device *dev = info->user_ptr[1];
6203         struct wireless_dev *wdev = dev->ieee80211_ptr;
6204         struct sk_buff *msg;
6205         void *hdr;
6206         const u8 *addr;
6207         u64 cookie;
6208         int err;
6209
6210         if (wdev->iftype != NL80211_IFTYPE_AP &&
6211             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6212                 return -EOPNOTSUPP;
6213
6214         if (!info->attrs[NL80211_ATTR_MAC])
6215                 return -EINVAL;
6216
6217         if (!rdev->ops->probe_client)
6218                 return -EOPNOTSUPP;
6219
6220         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6221         if (!msg)
6222                 return -ENOMEM;
6223
6224         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6225                              NL80211_CMD_PROBE_CLIENT);
6226
6227         if (IS_ERR(hdr)) {
6228                 err = PTR_ERR(hdr);
6229                 goto free_msg;
6230         }
6231
6232         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6233
6234         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6235         if (err)
6236                 goto free_msg;
6237
6238         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6239
6240         genlmsg_end(msg, hdr);
6241
6242         return genlmsg_reply(msg, info);
6243
6244  nla_put_failure:
6245         err = -ENOBUFS;
6246  free_msg:
6247         nlmsg_free(msg);
6248         return err;
6249 }
6250
6251 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6252 {
6253         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6254
6255         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6256                 return -EOPNOTSUPP;
6257
6258         if (rdev->ap_beacons_nlpid)
6259                 return -EBUSY;
6260
6261         rdev->ap_beacons_nlpid = info->snd_pid;
6262
6263         return 0;
6264 }
6265
6266 #define NL80211_FLAG_NEED_WIPHY         0x01
6267 #define NL80211_FLAG_NEED_NETDEV        0x02
6268 #define NL80211_FLAG_NEED_RTNL          0x04
6269 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6270 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6271                                          NL80211_FLAG_CHECK_NETDEV_UP)
6272
6273 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6274                             struct genl_info *info)
6275 {
6276         struct cfg80211_registered_device *rdev;
6277         struct net_device *dev;
6278         int err;
6279         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6280
6281         if (rtnl)
6282                 rtnl_lock();
6283
6284         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6285                 rdev = cfg80211_get_dev_from_info(info);
6286                 if (IS_ERR(rdev)) {
6287                         if (rtnl)
6288                                 rtnl_unlock();
6289                         return PTR_ERR(rdev);
6290                 }
6291                 info->user_ptr[0] = rdev;
6292         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6293                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6294                                               &rdev, &dev);
6295                 if (err) {
6296                         if (rtnl)
6297                                 rtnl_unlock();
6298                         return err;
6299                 }
6300                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6301                     !netif_running(dev)) {
6302                         cfg80211_unlock_rdev(rdev);
6303                         dev_put(dev);
6304                         if (rtnl)
6305                                 rtnl_unlock();
6306                         return -ENETDOWN;
6307                 }
6308                 info->user_ptr[0] = rdev;
6309                 info->user_ptr[1] = dev;
6310         }
6311
6312         return 0;
6313 }
6314
6315 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6316                               struct genl_info *info)
6317 {
6318         if (info->user_ptr[0])
6319                 cfg80211_unlock_rdev(info->user_ptr[0]);
6320         if (info->user_ptr[1])
6321                 dev_put(info->user_ptr[1]);
6322         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6323                 rtnl_unlock();
6324 }
6325
6326 static struct genl_ops nl80211_ops[] = {
6327         {
6328                 .cmd = NL80211_CMD_GET_WIPHY,
6329                 .doit = nl80211_get_wiphy,
6330                 .dumpit = nl80211_dump_wiphy,
6331                 .policy = nl80211_policy,
6332                 /* can be retrieved by unprivileged users */
6333                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6334         },
6335         {
6336                 .cmd = NL80211_CMD_SET_WIPHY,
6337                 .doit = nl80211_set_wiphy,
6338                 .policy = nl80211_policy,
6339                 .flags = GENL_ADMIN_PERM,
6340                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6341         },
6342         {
6343                 .cmd = NL80211_CMD_GET_INTERFACE,
6344                 .doit = nl80211_get_interface,
6345                 .dumpit = nl80211_dump_interface,
6346                 .policy = nl80211_policy,
6347                 /* can be retrieved by unprivileged users */
6348                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6349         },
6350         {
6351                 .cmd = NL80211_CMD_SET_INTERFACE,
6352                 .doit = nl80211_set_interface,
6353                 .policy = nl80211_policy,
6354                 .flags = GENL_ADMIN_PERM,
6355                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6356                                   NL80211_FLAG_NEED_RTNL,
6357         },
6358         {
6359                 .cmd = NL80211_CMD_NEW_INTERFACE,
6360                 .doit = nl80211_new_interface,
6361                 .policy = nl80211_policy,
6362                 .flags = GENL_ADMIN_PERM,
6363                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6364                                   NL80211_FLAG_NEED_RTNL,
6365         },
6366         {
6367                 .cmd = NL80211_CMD_DEL_INTERFACE,
6368                 .doit = nl80211_del_interface,
6369                 .policy = nl80211_policy,
6370                 .flags = GENL_ADMIN_PERM,
6371                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6372                                   NL80211_FLAG_NEED_RTNL,
6373         },
6374         {
6375                 .cmd = NL80211_CMD_GET_KEY,
6376                 .doit = nl80211_get_key,
6377                 .policy = nl80211_policy,
6378                 .flags = GENL_ADMIN_PERM,
6379                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6380                                   NL80211_FLAG_NEED_RTNL,
6381         },
6382         {
6383                 .cmd = NL80211_CMD_SET_KEY,
6384                 .doit = nl80211_set_key,
6385                 .policy = nl80211_policy,
6386                 .flags = GENL_ADMIN_PERM,
6387                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6388                                   NL80211_FLAG_NEED_RTNL,
6389         },
6390         {
6391                 .cmd = NL80211_CMD_NEW_KEY,
6392                 .doit = nl80211_new_key,
6393                 .policy = nl80211_policy,
6394                 .flags = GENL_ADMIN_PERM,
6395                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6396                                   NL80211_FLAG_NEED_RTNL,
6397         },
6398         {
6399                 .cmd = NL80211_CMD_DEL_KEY,
6400                 .doit = nl80211_del_key,
6401                 .policy = nl80211_policy,
6402                 .flags = GENL_ADMIN_PERM,
6403                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6404                                   NL80211_FLAG_NEED_RTNL,
6405         },
6406         {
6407                 .cmd = NL80211_CMD_SET_BEACON,
6408                 .policy = nl80211_policy,
6409                 .flags = GENL_ADMIN_PERM,
6410                 .doit = nl80211_set_beacon,
6411                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6412                                   NL80211_FLAG_NEED_RTNL,
6413         },
6414         {
6415                 .cmd = NL80211_CMD_START_AP,
6416                 .policy = nl80211_policy,
6417                 .flags = GENL_ADMIN_PERM,
6418                 .doit = nl80211_start_ap,
6419                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6420                                   NL80211_FLAG_NEED_RTNL,
6421         },
6422         {
6423                 .cmd = NL80211_CMD_STOP_AP,
6424                 .policy = nl80211_policy,
6425                 .flags = GENL_ADMIN_PERM,
6426                 .doit = nl80211_stop_ap,
6427                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6428                                   NL80211_FLAG_NEED_RTNL,
6429         },
6430         {
6431                 .cmd = NL80211_CMD_GET_STATION,
6432                 .doit = nl80211_get_station,
6433                 .dumpit = nl80211_dump_station,
6434                 .policy = nl80211_policy,
6435                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6436                                   NL80211_FLAG_NEED_RTNL,
6437         },
6438         {
6439                 .cmd = NL80211_CMD_SET_STATION,
6440                 .doit = nl80211_set_station,
6441                 .policy = nl80211_policy,
6442                 .flags = GENL_ADMIN_PERM,
6443                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6444                                   NL80211_FLAG_NEED_RTNL,
6445         },
6446         {
6447                 .cmd = NL80211_CMD_NEW_STATION,
6448                 .doit = nl80211_new_station,
6449                 .policy = nl80211_policy,
6450                 .flags = GENL_ADMIN_PERM,
6451                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6452                                   NL80211_FLAG_NEED_RTNL,
6453         },
6454         {
6455                 .cmd = NL80211_CMD_DEL_STATION,
6456                 .doit = nl80211_del_station,
6457                 .policy = nl80211_policy,
6458                 .flags = GENL_ADMIN_PERM,
6459                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6460                                   NL80211_FLAG_NEED_RTNL,
6461         },
6462         {
6463                 .cmd = NL80211_CMD_GET_MPATH,
6464                 .doit = nl80211_get_mpath,
6465                 .dumpit = nl80211_dump_mpath,
6466                 .policy = nl80211_policy,
6467                 .flags = GENL_ADMIN_PERM,
6468                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6469                                   NL80211_FLAG_NEED_RTNL,
6470         },
6471         {
6472                 .cmd = NL80211_CMD_SET_MPATH,
6473                 .doit = nl80211_set_mpath,
6474                 .policy = nl80211_policy,
6475                 .flags = GENL_ADMIN_PERM,
6476                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6477                                   NL80211_FLAG_NEED_RTNL,
6478         },
6479         {
6480                 .cmd = NL80211_CMD_NEW_MPATH,
6481                 .doit = nl80211_new_mpath,
6482                 .policy = nl80211_policy,
6483                 .flags = GENL_ADMIN_PERM,
6484                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6485                                   NL80211_FLAG_NEED_RTNL,
6486         },
6487         {
6488                 .cmd = NL80211_CMD_DEL_MPATH,
6489                 .doit = nl80211_del_mpath,
6490                 .policy = nl80211_policy,
6491                 .flags = GENL_ADMIN_PERM,
6492                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6493                                   NL80211_FLAG_NEED_RTNL,
6494         },
6495         {
6496                 .cmd = NL80211_CMD_SET_BSS,
6497                 .doit = nl80211_set_bss,
6498                 .policy = nl80211_policy,
6499                 .flags = GENL_ADMIN_PERM,
6500                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6501                                   NL80211_FLAG_NEED_RTNL,
6502         },
6503         {
6504                 .cmd = NL80211_CMD_GET_REG,
6505                 .doit = nl80211_get_reg,
6506                 .policy = nl80211_policy,
6507                 /* can be retrieved by unprivileged users */
6508         },
6509         {
6510                 .cmd = NL80211_CMD_SET_REG,
6511                 .doit = nl80211_set_reg,
6512                 .policy = nl80211_policy,
6513                 .flags = GENL_ADMIN_PERM,
6514         },
6515         {
6516                 .cmd = NL80211_CMD_REQ_SET_REG,
6517                 .doit = nl80211_req_set_reg,
6518                 .policy = nl80211_policy,
6519                 .flags = GENL_ADMIN_PERM,
6520         },
6521         {
6522                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6523                 .doit = nl80211_get_mesh_config,
6524                 .policy = nl80211_policy,
6525                 /* can be retrieved by unprivileged users */
6526                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6527                                   NL80211_FLAG_NEED_RTNL,
6528         },
6529         {
6530                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6531                 .doit = nl80211_update_mesh_config,
6532                 .policy = nl80211_policy,
6533                 .flags = GENL_ADMIN_PERM,
6534                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6535                                   NL80211_FLAG_NEED_RTNL,
6536         },
6537         {
6538                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6539                 .doit = nl80211_trigger_scan,
6540                 .policy = nl80211_policy,
6541                 .flags = GENL_ADMIN_PERM,
6542                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6543                                   NL80211_FLAG_NEED_RTNL,
6544         },
6545         {
6546                 .cmd = NL80211_CMD_GET_SCAN,
6547                 .policy = nl80211_policy,
6548                 .dumpit = nl80211_dump_scan,
6549         },
6550         {
6551                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6552                 .doit = nl80211_start_sched_scan,
6553                 .policy = nl80211_policy,
6554                 .flags = GENL_ADMIN_PERM,
6555                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6556                                   NL80211_FLAG_NEED_RTNL,
6557         },
6558         {
6559                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6560                 .doit = nl80211_stop_sched_scan,
6561                 .policy = nl80211_policy,
6562                 .flags = GENL_ADMIN_PERM,
6563                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6564                                   NL80211_FLAG_NEED_RTNL,
6565         },
6566         {
6567                 .cmd = NL80211_CMD_AUTHENTICATE,
6568                 .doit = nl80211_authenticate,
6569                 .policy = nl80211_policy,
6570                 .flags = GENL_ADMIN_PERM,
6571                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6572                                   NL80211_FLAG_NEED_RTNL,
6573         },
6574         {
6575                 .cmd = NL80211_CMD_ASSOCIATE,
6576                 .doit = nl80211_associate,
6577                 .policy = nl80211_policy,
6578                 .flags = GENL_ADMIN_PERM,
6579                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6580                                   NL80211_FLAG_NEED_RTNL,
6581         },
6582         {
6583                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6584                 .doit = nl80211_deauthenticate,
6585                 .policy = nl80211_policy,
6586                 .flags = GENL_ADMIN_PERM,
6587                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6588                                   NL80211_FLAG_NEED_RTNL,
6589         },
6590         {
6591                 .cmd = NL80211_CMD_DISASSOCIATE,
6592                 .doit = nl80211_disassociate,
6593                 .policy = nl80211_policy,
6594                 .flags = GENL_ADMIN_PERM,
6595                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6596                                   NL80211_FLAG_NEED_RTNL,
6597         },
6598         {
6599                 .cmd = NL80211_CMD_JOIN_IBSS,
6600                 .doit = nl80211_join_ibss,
6601                 .policy = nl80211_policy,
6602                 .flags = GENL_ADMIN_PERM,
6603                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6604                                   NL80211_FLAG_NEED_RTNL,
6605         },
6606         {
6607                 .cmd = NL80211_CMD_LEAVE_IBSS,
6608                 .doit = nl80211_leave_ibss,
6609                 .policy = nl80211_policy,
6610                 .flags = GENL_ADMIN_PERM,
6611                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6612                                   NL80211_FLAG_NEED_RTNL,
6613         },
6614 #ifdef CONFIG_NL80211_TESTMODE
6615         {
6616                 .cmd = NL80211_CMD_TESTMODE,
6617                 .doit = nl80211_testmode_do,
6618                 .dumpit = nl80211_testmode_dump,
6619                 .policy = nl80211_policy,
6620                 .flags = GENL_ADMIN_PERM,
6621                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6622                                   NL80211_FLAG_NEED_RTNL,
6623         },
6624 #endif
6625         {
6626                 .cmd = NL80211_CMD_CONNECT,
6627                 .doit = nl80211_connect,
6628                 .policy = nl80211_policy,
6629                 .flags = GENL_ADMIN_PERM,
6630                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6631                                   NL80211_FLAG_NEED_RTNL,
6632         },
6633         {
6634                 .cmd = NL80211_CMD_DISCONNECT,
6635                 .doit = nl80211_disconnect,
6636                 .policy = nl80211_policy,
6637                 .flags = GENL_ADMIN_PERM,
6638                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6639                                   NL80211_FLAG_NEED_RTNL,
6640         },
6641         {
6642                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6643                 .doit = nl80211_wiphy_netns,
6644                 .policy = nl80211_policy,
6645                 .flags = GENL_ADMIN_PERM,
6646                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6647                                   NL80211_FLAG_NEED_RTNL,
6648         },
6649         {
6650                 .cmd = NL80211_CMD_GET_SURVEY,
6651                 .policy = nl80211_policy,
6652                 .dumpit = nl80211_dump_survey,
6653         },
6654         {
6655                 .cmd = NL80211_CMD_SET_PMKSA,
6656                 .doit = nl80211_setdel_pmksa,
6657                 .policy = nl80211_policy,
6658                 .flags = GENL_ADMIN_PERM,
6659                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6660                                   NL80211_FLAG_NEED_RTNL,
6661         },
6662         {
6663                 .cmd = NL80211_CMD_DEL_PMKSA,
6664                 .doit = nl80211_setdel_pmksa,
6665                 .policy = nl80211_policy,
6666                 .flags = GENL_ADMIN_PERM,
6667                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6668                                   NL80211_FLAG_NEED_RTNL,
6669         },
6670         {
6671                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6672                 .doit = nl80211_flush_pmksa,
6673                 .policy = nl80211_policy,
6674                 .flags = GENL_ADMIN_PERM,
6675                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6676                                   NL80211_FLAG_NEED_RTNL,
6677         },
6678         {
6679                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6680                 .doit = nl80211_remain_on_channel,
6681                 .policy = nl80211_policy,
6682                 .flags = GENL_ADMIN_PERM,
6683                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6684                                   NL80211_FLAG_NEED_RTNL,
6685         },
6686         {
6687                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6688                 .doit = nl80211_cancel_remain_on_channel,
6689                 .policy = nl80211_policy,
6690                 .flags = GENL_ADMIN_PERM,
6691                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6692                                   NL80211_FLAG_NEED_RTNL,
6693         },
6694         {
6695                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6696                 .doit = nl80211_set_tx_bitrate_mask,
6697                 .policy = nl80211_policy,
6698                 .flags = GENL_ADMIN_PERM,
6699                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6700                                   NL80211_FLAG_NEED_RTNL,
6701         },
6702         {
6703                 .cmd = NL80211_CMD_REGISTER_FRAME,
6704                 .doit = nl80211_register_mgmt,
6705                 .policy = nl80211_policy,
6706                 .flags = GENL_ADMIN_PERM,
6707                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6708                                   NL80211_FLAG_NEED_RTNL,
6709         },
6710         {
6711                 .cmd = NL80211_CMD_FRAME,
6712                 .doit = nl80211_tx_mgmt,
6713                 .policy = nl80211_policy,
6714                 .flags = GENL_ADMIN_PERM,
6715                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6716                                   NL80211_FLAG_NEED_RTNL,
6717         },
6718         {
6719                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6720                 .doit = nl80211_tx_mgmt_cancel_wait,
6721                 .policy = nl80211_policy,
6722                 .flags = GENL_ADMIN_PERM,
6723                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6724                                   NL80211_FLAG_NEED_RTNL,
6725         },
6726         {
6727                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6728                 .doit = nl80211_set_power_save,
6729                 .policy = nl80211_policy,
6730                 .flags = GENL_ADMIN_PERM,
6731                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6732                                   NL80211_FLAG_NEED_RTNL,
6733         },
6734         {
6735                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6736                 .doit = nl80211_get_power_save,
6737                 .policy = nl80211_policy,
6738                 /* can be retrieved by unprivileged users */
6739                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6740                                   NL80211_FLAG_NEED_RTNL,
6741         },
6742         {
6743                 .cmd = NL80211_CMD_SET_CQM,
6744                 .doit = nl80211_set_cqm,
6745                 .policy = nl80211_policy,
6746                 .flags = GENL_ADMIN_PERM,
6747                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6748                                   NL80211_FLAG_NEED_RTNL,
6749         },
6750         {
6751                 .cmd = NL80211_CMD_SET_CHANNEL,
6752                 .doit = nl80211_set_channel,
6753                 .policy = nl80211_policy,
6754                 .flags = GENL_ADMIN_PERM,
6755                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6756                                   NL80211_FLAG_NEED_RTNL,
6757         },
6758         {
6759                 .cmd = NL80211_CMD_SET_WDS_PEER,
6760                 .doit = nl80211_set_wds_peer,
6761                 .policy = nl80211_policy,
6762                 .flags = GENL_ADMIN_PERM,
6763                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6764                                   NL80211_FLAG_NEED_RTNL,
6765         },
6766         {
6767                 .cmd = NL80211_CMD_JOIN_MESH,
6768                 .doit = nl80211_join_mesh,
6769                 .policy = nl80211_policy,
6770                 .flags = GENL_ADMIN_PERM,
6771                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6772                                   NL80211_FLAG_NEED_RTNL,
6773         },
6774         {
6775                 .cmd = NL80211_CMD_LEAVE_MESH,
6776                 .doit = nl80211_leave_mesh,
6777                 .policy = nl80211_policy,
6778                 .flags = GENL_ADMIN_PERM,
6779                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6780                                   NL80211_FLAG_NEED_RTNL,
6781         },
6782         {
6783                 .cmd = NL80211_CMD_GET_WOWLAN,
6784                 .doit = nl80211_get_wowlan,
6785                 .policy = nl80211_policy,
6786                 /* can be retrieved by unprivileged users */
6787                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6788                                   NL80211_FLAG_NEED_RTNL,
6789         },
6790         {
6791                 .cmd = NL80211_CMD_SET_WOWLAN,
6792                 .doit = nl80211_set_wowlan,
6793                 .policy = nl80211_policy,
6794                 .flags = GENL_ADMIN_PERM,
6795                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6796                                   NL80211_FLAG_NEED_RTNL,
6797         },
6798         {
6799                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6800                 .doit = nl80211_set_rekey_data,
6801                 .policy = nl80211_policy,
6802                 .flags = GENL_ADMIN_PERM,
6803                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6804                                   NL80211_FLAG_NEED_RTNL,
6805         },
6806         {
6807                 .cmd = NL80211_CMD_TDLS_MGMT,
6808                 .doit = nl80211_tdls_mgmt,
6809                 .policy = nl80211_policy,
6810                 .flags = GENL_ADMIN_PERM,
6811                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6812                                   NL80211_FLAG_NEED_RTNL,
6813         },
6814         {
6815                 .cmd = NL80211_CMD_TDLS_OPER,
6816                 .doit = nl80211_tdls_oper,
6817                 .policy = nl80211_policy,
6818                 .flags = GENL_ADMIN_PERM,
6819                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6820                                   NL80211_FLAG_NEED_RTNL,
6821         },
6822         {
6823                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6824                 .doit = nl80211_register_unexpected_frame,
6825                 .policy = nl80211_policy,
6826                 .flags = GENL_ADMIN_PERM,
6827                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6828                                   NL80211_FLAG_NEED_RTNL,
6829         },
6830         {
6831                 .cmd = NL80211_CMD_PROBE_CLIENT,
6832                 .doit = nl80211_probe_client,
6833                 .policy = nl80211_policy,
6834                 .flags = GENL_ADMIN_PERM,
6835                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6836                                   NL80211_FLAG_NEED_RTNL,
6837         },
6838         {
6839                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6840                 .doit = nl80211_register_beacons,
6841                 .policy = nl80211_policy,
6842                 .flags = GENL_ADMIN_PERM,
6843                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6844                                   NL80211_FLAG_NEED_RTNL,
6845         },
6846         {
6847                 .cmd = NL80211_CMD_SET_NOACK_MAP,
6848                 .doit = nl80211_set_noack_map,
6849                 .policy = nl80211_policy,
6850                 .flags = GENL_ADMIN_PERM,
6851                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6852                                   NL80211_FLAG_NEED_RTNL,
6853         },
6854
6855 };
6856
6857 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6858         .name = "mlme",
6859 };
6860
6861 /* multicast groups */
6862 static struct genl_multicast_group nl80211_config_mcgrp = {
6863         .name = "config",
6864 };
6865 static struct genl_multicast_group nl80211_scan_mcgrp = {
6866         .name = "scan",
6867 };
6868 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6869         .name = "regulatory",
6870 };
6871
6872 /* notification functions */
6873
6874 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6875 {
6876         struct sk_buff *msg;
6877
6878         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6879         if (!msg)
6880                 return;
6881
6882         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
6883                 nlmsg_free(msg);
6884                 return;
6885         }
6886
6887         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6888                                 nl80211_config_mcgrp.id, GFP_KERNEL);
6889 }
6890
6891 static int nl80211_add_scan_req(struct sk_buff *msg,
6892                                 struct cfg80211_registered_device *rdev)
6893 {
6894         struct cfg80211_scan_request *req = rdev->scan_req;
6895         struct nlattr *nest;
6896         int i;
6897
6898         ASSERT_RDEV_LOCK(rdev);
6899
6900         if (WARN_ON(!req))
6901                 return 0;
6902
6903         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
6904         if (!nest)
6905                 goto nla_put_failure;
6906         for (i = 0; i < req->n_ssids; i++)
6907                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
6908         nla_nest_end(msg, nest);
6909
6910         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
6911         if (!nest)
6912                 goto nla_put_failure;
6913         for (i = 0; i < req->n_channels; i++)
6914                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
6915         nla_nest_end(msg, nest);
6916
6917         if (req->ie)
6918                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
6919
6920         return 0;
6921  nla_put_failure:
6922         return -ENOBUFS;
6923 }
6924
6925 static int nl80211_send_scan_msg(struct sk_buff *msg,
6926                                  struct cfg80211_registered_device *rdev,
6927                                  struct net_device *netdev,
6928                                  u32 pid, u32 seq, int flags,
6929                                  u32 cmd)
6930 {
6931         void *hdr;
6932
6933         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6934         if (!hdr)
6935                 return -1;
6936
6937         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6938         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6939
6940         /* ignore errors and send incomplete event anyway */
6941         nl80211_add_scan_req(msg, rdev);
6942
6943         return genlmsg_end(msg, hdr);
6944
6945  nla_put_failure:
6946         genlmsg_cancel(msg, hdr);
6947         return -EMSGSIZE;
6948 }
6949
6950 static int
6951 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6952                             struct cfg80211_registered_device *rdev,
6953                             struct net_device *netdev,
6954                             u32 pid, u32 seq, int flags, u32 cmd)
6955 {
6956         void *hdr;
6957
6958         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6959         if (!hdr)
6960                 return -1;
6961
6962         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6963         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6964
6965         return genlmsg_end(msg, hdr);
6966
6967  nla_put_failure:
6968         genlmsg_cancel(msg, hdr);
6969         return -EMSGSIZE;
6970 }
6971
6972 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
6973                              struct net_device *netdev)
6974 {
6975         struct sk_buff *msg;
6976
6977         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6978         if (!msg)
6979                 return;
6980
6981         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6982                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
6983                 nlmsg_free(msg);
6984                 return;
6985         }
6986
6987         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6988                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6989 }
6990
6991 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
6992                             struct net_device *netdev)
6993 {
6994         struct sk_buff *msg;
6995
6996         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6997         if (!msg)
6998                 return;
6999
7000         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7001                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7002                 nlmsg_free(msg);
7003                 return;
7004         }
7005
7006         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7007                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7008 }
7009
7010 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7011                                struct net_device *netdev)
7012 {
7013         struct sk_buff *msg;
7014
7015         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7016         if (!msg)
7017                 return;
7018
7019         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7020                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7021                 nlmsg_free(msg);
7022                 return;
7023         }
7024
7025         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7026                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7027 }
7028
7029 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7030                                      struct net_device *netdev)
7031 {
7032         struct sk_buff *msg;
7033
7034         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7035         if (!msg)
7036                 return;
7037
7038         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7039                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7040                 nlmsg_free(msg);
7041                 return;
7042         }
7043
7044         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7045                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7046 }
7047
7048 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7049                              struct net_device *netdev, u32 cmd)
7050 {
7051         struct sk_buff *msg;
7052
7053         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7054         if (!msg)
7055                 return;
7056
7057         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7058                 nlmsg_free(msg);
7059                 return;
7060         }
7061
7062         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7063                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7064 }
7065
7066 /*
7067  * This can happen on global regulatory changes or device specific settings
7068  * based on custom world regulatory domains.
7069  */
7070 void nl80211_send_reg_change_event(struct regulatory_request *request)
7071 {
7072         struct sk_buff *msg;
7073         void *hdr;
7074
7075         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7076         if (!msg)
7077                 return;
7078
7079         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7080         if (!hdr) {
7081                 nlmsg_free(msg);
7082                 return;
7083         }
7084
7085         /* Userspace can always count this one always being set */
7086         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
7087
7088         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
7089                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7090                            NL80211_REGDOM_TYPE_WORLD);
7091         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
7092                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7093                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
7094         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7095                  request->intersect)
7096                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7097                            NL80211_REGDOM_TYPE_INTERSECTION);
7098         else {
7099                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7100                            NL80211_REGDOM_TYPE_COUNTRY);
7101                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
7102         }
7103
7104         if (wiphy_idx_valid(request->wiphy_idx))
7105                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
7106
7107         genlmsg_end(msg, hdr);
7108
7109         rcu_read_lock();
7110         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7111                                 GFP_ATOMIC);
7112         rcu_read_unlock();
7113
7114         return;
7115
7116 nla_put_failure:
7117         genlmsg_cancel(msg, hdr);
7118         nlmsg_free(msg);
7119 }
7120
7121 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7122                                     struct net_device *netdev,
7123                                     const u8 *buf, size_t len,
7124                                     enum nl80211_commands cmd, gfp_t gfp)
7125 {
7126         struct sk_buff *msg;
7127         void *hdr;
7128
7129         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7130         if (!msg)
7131                 return;
7132
7133         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7134         if (!hdr) {
7135                 nlmsg_free(msg);
7136                 return;
7137         }
7138
7139         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7140         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7141         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7142
7143         genlmsg_end(msg, hdr);
7144
7145         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7146                                 nl80211_mlme_mcgrp.id, gfp);
7147         return;
7148
7149  nla_put_failure:
7150         genlmsg_cancel(msg, hdr);
7151         nlmsg_free(msg);
7152 }
7153
7154 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7155                           struct net_device *netdev, const u8 *buf,
7156                           size_t len, gfp_t gfp)
7157 {
7158         nl80211_send_mlme_event(rdev, netdev, buf, len,
7159                                 NL80211_CMD_AUTHENTICATE, gfp);
7160 }
7161
7162 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7163                            struct net_device *netdev, const u8 *buf,
7164                            size_t len, gfp_t gfp)
7165 {
7166         nl80211_send_mlme_event(rdev, netdev, buf, len,
7167                                 NL80211_CMD_ASSOCIATE, gfp);
7168 }
7169
7170 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7171                          struct net_device *netdev, const u8 *buf,
7172                          size_t len, gfp_t gfp)
7173 {
7174         nl80211_send_mlme_event(rdev, netdev, buf, len,
7175                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7176 }
7177
7178 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7179                            struct net_device *netdev, const u8 *buf,
7180                            size_t len, gfp_t gfp)
7181 {
7182         nl80211_send_mlme_event(rdev, netdev, buf, len,
7183                                 NL80211_CMD_DISASSOCIATE, gfp);
7184 }
7185
7186 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7187                                 struct net_device *netdev, const u8 *buf,
7188                                 size_t len, gfp_t gfp)
7189 {
7190         nl80211_send_mlme_event(rdev, netdev, buf, len,
7191                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7192 }
7193
7194 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7195                                   struct net_device *netdev, const u8 *buf,
7196                                   size_t len, gfp_t gfp)
7197 {
7198         nl80211_send_mlme_event(rdev, netdev, buf, len,
7199                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7200 }
7201
7202 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7203                                       struct net_device *netdev, int cmd,
7204                                       const u8 *addr, gfp_t gfp)
7205 {
7206         struct sk_buff *msg;
7207         void *hdr;
7208
7209         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7210         if (!msg)
7211                 return;
7212
7213         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7214         if (!hdr) {
7215                 nlmsg_free(msg);
7216                 return;
7217         }
7218
7219         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7220         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7221         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
7222         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7223
7224         genlmsg_end(msg, hdr);
7225
7226         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7227                                 nl80211_mlme_mcgrp.id, gfp);
7228         return;
7229
7230  nla_put_failure:
7231         genlmsg_cancel(msg, hdr);
7232         nlmsg_free(msg);
7233 }
7234
7235 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7236                                struct net_device *netdev, const u8 *addr,
7237                                gfp_t gfp)
7238 {
7239         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7240                                   addr, gfp);
7241 }
7242
7243 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7244                                 struct net_device *netdev, const u8 *addr,
7245                                 gfp_t gfp)
7246 {
7247         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7248                                   addr, gfp);
7249 }
7250
7251 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7252                                  struct net_device *netdev, const u8 *bssid,
7253                                  const u8 *req_ie, size_t req_ie_len,
7254                                  const u8 *resp_ie, size_t resp_ie_len,
7255                                  u16 status, gfp_t gfp)
7256 {
7257         struct sk_buff *msg;
7258         void *hdr;
7259
7260         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7261         if (!msg)
7262                 return;
7263
7264         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7265         if (!hdr) {
7266                 nlmsg_free(msg);
7267                 return;
7268         }
7269
7270         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7271         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7272         if (bssid)
7273                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7274         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
7275         if (req_ie)
7276                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7277         if (resp_ie)
7278                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7279
7280         genlmsg_end(msg, hdr);
7281
7282         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7283                                 nl80211_mlme_mcgrp.id, gfp);
7284         return;
7285
7286  nla_put_failure:
7287         genlmsg_cancel(msg, hdr);
7288         nlmsg_free(msg);
7289
7290 }
7291
7292 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7293                          struct net_device *netdev, const u8 *bssid,
7294                          const u8 *req_ie, size_t req_ie_len,
7295                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7296 {
7297         struct sk_buff *msg;
7298         void *hdr;
7299
7300         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7301         if (!msg)
7302                 return;
7303
7304         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7305         if (!hdr) {
7306                 nlmsg_free(msg);
7307                 return;
7308         }
7309
7310         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7311         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7312         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7313         if (req_ie)
7314                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7315         if (resp_ie)
7316                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7317
7318         genlmsg_end(msg, hdr);
7319
7320         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7321                                 nl80211_mlme_mcgrp.id, gfp);
7322         return;
7323
7324  nla_put_failure:
7325         genlmsg_cancel(msg, hdr);
7326         nlmsg_free(msg);
7327
7328 }
7329
7330 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7331                                struct net_device *netdev, u16 reason,
7332                                const u8 *ie, size_t ie_len, bool from_ap)
7333 {
7334         struct sk_buff *msg;
7335         void *hdr;
7336
7337         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7338         if (!msg)
7339                 return;
7340
7341         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7342         if (!hdr) {
7343                 nlmsg_free(msg);
7344                 return;
7345         }
7346
7347         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7348         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7349         if (from_ap && reason)
7350                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
7351         if (from_ap)
7352                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
7353         if (ie)
7354                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
7355
7356         genlmsg_end(msg, hdr);
7357
7358         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7359                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7360         return;
7361
7362  nla_put_failure:
7363         genlmsg_cancel(msg, hdr);
7364         nlmsg_free(msg);
7365
7366 }
7367
7368 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7369                              struct net_device *netdev, const u8 *bssid,
7370                              gfp_t gfp)
7371 {
7372         struct sk_buff *msg;
7373         void *hdr;
7374
7375         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7376         if (!msg)
7377                 return;
7378
7379         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7380         if (!hdr) {
7381                 nlmsg_free(msg);
7382                 return;
7383         }
7384
7385         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7386         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7387         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7388
7389         genlmsg_end(msg, hdr);
7390
7391         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7392                                 nl80211_mlme_mcgrp.id, gfp);
7393         return;
7394
7395  nla_put_failure:
7396         genlmsg_cancel(msg, hdr);
7397         nlmsg_free(msg);
7398 }
7399
7400 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7401                 struct net_device *netdev,
7402                 const u8 *macaddr, const u8* ie, u8 ie_len,
7403                 gfp_t gfp)
7404 {
7405         struct sk_buff *msg;
7406         void *hdr;
7407
7408         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7409         if (!msg)
7410                 return;
7411
7412         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7413         if (!hdr) {
7414                 nlmsg_free(msg);
7415                 return;
7416         }
7417
7418         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7419         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7420         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
7421         if (ie_len && ie)
7422                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
7423
7424         genlmsg_end(msg, hdr);
7425
7426         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7427                                 nl80211_mlme_mcgrp.id, gfp);
7428         return;
7429
7430  nla_put_failure:
7431         genlmsg_cancel(msg, hdr);
7432         nlmsg_free(msg);
7433 }
7434
7435 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7436                                  struct net_device *netdev, const u8 *addr,
7437                                  enum nl80211_key_type key_type, int key_id,
7438                                  const u8 *tsc, gfp_t gfp)
7439 {
7440         struct sk_buff *msg;
7441         void *hdr;
7442
7443         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7444         if (!msg)
7445                 return;
7446
7447         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7448         if (!hdr) {
7449                 nlmsg_free(msg);
7450                 return;
7451         }
7452
7453         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7454         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7455         if (addr)
7456                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7457         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
7458         if (key_id != -1)
7459                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
7460         if (tsc)
7461                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
7462
7463         genlmsg_end(msg, hdr);
7464
7465         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7466                                 nl80211_mlme_mcgrp.id, gfp);
7467         return;
7468
7469  nla_put_failure:
7470         genlmsg_cancel(msg, hdr);
7471         nlmsg_free(msg);
7472 }
7473
7474 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7475                                     struct ieee80211_channel *channel_before,
7476                                     struct ieee80211_channel *channel_after)
7477 {
7478         struct sk_buff *msg;
7479         void *hdr;
7480         struct nlattr *nl_freq;
7481
7482         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7483         if (!msg)
7484                 return;
7485
7486         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7487         if (!hdr) {
7488                 nlmsg_free(msg);
7489                 return;
7490         }
7491
7492         /*
7493          * Since we are applying the beacon hint to a wiphy we know its
7494          * wiphy_idx is valid
7495          */
7496         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
7497
7498         /* Before */
7499         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7500         if (!nl_freq)
7501                 goto nla_put_failure;
7502         if (nl80211_msg_put_channel(msg, channel_before))
7503                 goto nla_put_failure;
7504         nla_nest_end(msg, nl_freq);
7505
7506         /* After */
7507         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7508         if (!nl_freq)
7509                 goto nla_put_failure;
7510         if (nl80211_msg_put_channel(msg, channel_after))
7511                 goto nla_put_failure;
7512         nla_nest_end(msg, nl_freq);
7513
7514         genlmsg_end(msg, hdr);
7515
7516         rcu_read_lock();
7517         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7518                                 GFP_ATOMIC);
7519         rcu_read_unlock();
7520
7521         return;
7522
7523 nla_put_failure:
7524         genlmsg_cancel(msg, hdr);
7525         nlmsg_free(msg);
7526 }
7527
7528 static void nl80211_send_remain_on_chan_event(
7529         int cmd, struct cfg80211_registered_device *rdev,
7530         struct net_device *netdev, u64 cookie,
7531         struct ieee80211_channel *chan,
7532         enum nl80211_channel_type channel_type,
7533         unsigned int duration, gfp_t gfp)
7534 {
7535         struct sk_buff *msg;
7536         void *hdr;
7537
7538         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7539         if (!msg)
7540                 return;
7541
7542         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7543         if (!hdr) {
7544                 nlmsg_free(msg);
7545                 return;
7546         }
7547
7548         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7549         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7550         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
7551         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
7552         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7553
7554         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
7555                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
7556
7557         genlmsg_end(msg, hdr);
7558
7559         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7560                                 nl80211_mlme_mcgrp.id, gfp);
7561         return;
7562
7563  nla_put_failure:
7564         genlmsg_cancel(msg, hdr);
7565         nlmsg_free(msg);
7566 }
7567
7568 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7569                                     struct net_device *netdev, u64 cookie,
7570                                     struct ieee80211_channel *chan,
7571                                     enum nl80211_channel_type channel_type,
7572                                     unsigned int duration, gfp_t gfp)
7573 {
7574         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7575                                           rdev, netdev, cookie, chan,
7576                                           channel_type, duration, gfp);
7577 }
7578
7579 void nl80211_send_remain_on_channel_cancel(
7580         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7581         u64 cookie, struct ieee80211_channel *chan,
7582         enum nl80211_channel_type channel_type, gfp_t gfp)
7583 {
7584         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7585                                           rdev, netdev, cookie, chan,
7586                                           channel_type, 0, gfp);
7587 }
7588
7589 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7590                             struct net_device *dev, const u8 *mac_addr,
7591                             struct station_info *sinfo, gfp_t gfp)
7592 {
7593         struct sk_buff *msg;
7594
7595         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7596         if (!msg)
7597                 return;
7598
7599         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
7600                 nlmsg_free(msg);
7601                 return;
7602         }
7603
7604         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7605                                 nl80211_mlme_mcgrp.id, gfp);
7606 }
7607
7608 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7609                                 struct net_device *dev, const u8 *mac_addr,
7610                                 gfp_t gfp)
7611 {
7612         struct sk_buff *msg;
7613         void *hdr;
7614
7615         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7616         if (!msg)
7617                 return;
7618
7619         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7620         if (!hdr) {
7621                 nlmsg_free(msg);
7622                 return;
7623         }
7624
7625         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7626         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
7627
7628         genlmsg_end(msg, hdr);
7629
7630         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7631                                 nl80211_mlme_mcgrp.id, gfp);
7632         return;
7633
7634  nla_put_failure:
7635         genlmsg_cancel(msg, hdr);
7636         nlmsg_free(msg);
7637 }
7638
7639 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7640                                        const u8 *addr, gfp_t gfp)
7641 {
7642         struct wireless_dev *wdev = dev->ieee80211_ptr;
7643         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7644         struct sk_buff *msg;
7645         void *hdr;
7646         int err;
7647         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7648
7649         if (!nlpid)
7650                 return false;
7651
7652         msg = nlmsg_new(100, gfp);
7653         if (!msg)
7654                 return true;
7655
7656         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7657         if (!hdr) {
7658                 nlmsg_free(msg);
7659                 return true;
7660         }
7661
7662         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7663         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7664         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7665
7666         err = genlmsg_end(msg, hdr);
7667         if (err < 0) {
7668                 nlmsg_free(msg);
7669                 return true;
7670         }
7671
7672         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7673         return true;
7674
7675  nla_put_failure:
7676         genlmsg_cancel(msg, hdr);
7677         nlmsg_free(msg);
7678         return true;
7679 }
7680
7681 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7682 {
7683         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7684                                           addr, gfp);
7685 }
7686
7687 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7688                                     const u8 *addr, gfp_t gfp)
7689 {
7690         return __nl80211_unexpected_frame(dev,
7691                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7692                                           addr, gfp);
7693 }
7694
7695 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7696                       struct net_device *netdev, u32 nlpid,
7697                       int freq, int sig_dbm,
7698                       const u8 *buf, size_t len, gfp_t gfp)
7699 {
7700         struct sk_buff *msg;
7701         void *hdr;
7702
7703         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7704         if (!msg)
7705                 return -ENOMEM;
7706
7707         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7708         if (!hdr) {
7709                 nlmsg_free(msg);
7710                 return -ENOMEM;
7711         }
7712
7713         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7715         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7716         if (sig_dbm)
7717                 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
7718         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7719
7720         genlmsg_end(msg, hdr);
7721
7722         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7723
7724  nla_put_failure:
7725         genlmsg_cancel(msg, hdr);
7726         nlmsg_free(msg);
7727         return -ENOBUFS;
7728 }
7729
7730 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7731                                  struct net_device *netdev, u64 cookie,
7732                                  const u8 *buf, size_t len, bool ack,
7733                                  gfp_t gfp)
7734 {
7735         struct sk_buff *msg;
7736         void *hdr;
7737
7738         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7739         if (!msg)
7740                 return;
7741
7742         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7743         if (!hdr) {
7744                 nlmsg_free(msg);
7745                 return;
7746         }
7747
7748         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7749         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7750         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7751         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7752         if (ack)
7753                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7754
7755         genlmsg_end(msg, hdr);
7756
7757         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7758         return;
7759
7760  nla_put_failure:
7761         genlmsg_cancel(msg, hdr);
7762         nlmsg_free(msg);
7763 }
7764
7765 void
7766 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7767                              struct net_device *netdev,
7768                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7769                              gfp_t gfp)
7770 {
7771         struct sk_buff *msg;
7772         struct nlattr *pinfoattr;
7773         void *hdr;
7774
7775         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7776         if (!msg)
7777                 return;
7778
7779         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7780         if (!hdr) {
7781                 nlmsg_free(msg);
7782                 return;
7783         }
7784
7785         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7786         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7787
7788         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7789         if (!pinfoattr)
7790                 goto nla_put_failure;
7791
7792         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7793                     rssi_event);
7794
7795         nla_nest_end(msg, pinfoattr);
7796
7797         genlmsg_end(msg, hdr);
7798
7799         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7800                                 nl80211_mlme_mcgrp.id, gfp);
7801         return;
7802
7803  nla_put_failure:
7804         genlmsg_cancel(msg, hdr);
7805         nlmsg_free(msg);
7806 }
7807
7808 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7809                               struct net_device *netdev, const u8 *bssid,
7810                               const u8 *replay_ctr, gfp_t gfp)
7811 {
7812         struct sk_buff *msg;
7813         struct nlattr *rekey_attr;
7814         void *hdr;
7815
7816         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7817         if (!msg)
7818                 return;
7819
7820         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7821         if (!hdr) {
7822                 nlmsg_free(msg);
7823                 return;
7824         }
7825
7826         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7827         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7828         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7829
7830         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7831         if (!rekey_attr)
7832                 goto nla_put_failure;
7833
7834         NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7835                 NL80211_REPLAY_CTR_LEN, replay_ctr);
7836
7837         nla_nest_end(msg, rekey_attr);
7838
7839         genlmsg_end(msg, hdr);
7840
7841         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7842                                 nl80211_mlme_mcgrp.id, gfp);
7843         return;
7844
7845  nla_put_failure:
7846         genlmsg_cancel(msg, hdr);
7847         nlmsg_free(msg);
7848 }
7849
7850 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
7851                                     struct net_device *netdev, int index,
7852                                     const u8 *bssid, bool preauth, gfp_t gfp)
7853 {
7854         struct sk_buff *msg;
7855         struct nlattr *attr;
7856         void *hdr;
7857
7858         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7859         if (!msg)
7860                 return;
7861
7862         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
7863         if (!hdr) {
7864                 nlmsg_free(msg);
7865                 return;
7866         }
7867
7868         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7869         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7870
7871         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
7872         if (!attr)
7873                 goto nla_put_failure;
7874
7875         NLA_PUT_U32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index);
7876         NLA_PUT(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid);
7877         if (preauth)
7878                 NLA_PUT_FLAG(msg, NL80211_PMKSA_CANDIDATE_PREAUTH);
7879
7880         nla_nest_end(msg, attr);
7881
7882         genlmsg_end(msg, hdr);
7883
7884         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7885                                 nl80211_mlme_mcgrp.id, gfp);
7886         return;
7887
7888  nla_put_failure:
7889         genlmsg_cancel(msg, hdr);
7890         nlmsg_free(msg);
7891 }
7892
7893 void
7894 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
7895                                 struct net_device *netdev, const u8 *peer,
7896                                 u32 num_packets, gfp_t gfp)
7897 {
7898         struct sk_buff *msg;
7899         struct nlattr *pinfoattr;
7900         void *hdr;
7901
7902         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7903         if (!msg)
7904                 return;
7905
7906         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7907         if (!hdr) {
7908                 nlmsg_free(msg);
7909                 return;
7910         }
7911
7912         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7913         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7914         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
7915
7916         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7917         if (!pinfoattr)
7918                 goto nla_put_failure;
7919
7920         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
7921
7922         nla_nest_end(msg, pinfoattr);
7923
7924         genlmsg_end(msg, hdr);
7925
7926         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7927                                 nl80211_mlme_mcgrp.id, gfp);
7928         return;
7929
7930  nla_put_failure:
7931         genlmsg_cancel(msg, hdr);
7932         nlmsg_free(msg);
7933 }
7934
7935 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
7936                            u64 cookie, bool acked, gfp_t gfp)
7937 {
7938         struct wireless_dev *wdev = dev->ieee80211_ptr;
7939         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7940         struct sk_buff *msg;
7941         void *hdr;
7942         int err;
7943
7944         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7945         if (!msg)
7946                 return;
7947
7948         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
7949         if (!hdr) {
7950                 nlmsg_free(msg);
7951                 return;
7952         }
7953
7954         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7955         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7956         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7957         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7958         if (acked)
7959                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7960
7961         err = genlmsg_end(msg, hdr);
7962         if (err < 0) {
7963                 nlmsg_free(msg);
7964                 return;
7965         }
7966
7967         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7968                                 nl80211_mlme_mcgrp.id, gfp);
7969         return;
7970
7971  nla_put_failure:
7972         genlmsg_cancel(msg, hdr);
7973         nlmsg_free(msg);
7974 }
7975 EXPORT_SYMBOL(cfg80211_probe_status);
7976
7977 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
7978                                  const u8 *frame, size_t len,
7979                                  int freq, int sig_dbm, gfp_t gfp)
7980 {
7981         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
7982         struct sk_buff *msg;
7983         void *hdr;
7984         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
7985
7986         if (!nlpid)
7987                 return;
7988
7989         msg = nlmsg_new(len + 100, gfp);
7990         if (!msg)
7991                 return;
7992
7993         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7994         if (!hdr) {
7995                 nlmsg_free(msg);
7996                 return;
7997         }
7998
7999         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
8000         if (freq)
8001                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
8002         if (sig_dbm)
8003                 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
8004         NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
8005
8006         genlmsg_end(msg, hdr);
8007
8008         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8009         return;
8010
8011  nla_put_failure:
8012         genlmsg_cancel(msg, hdr);
8013         nlmsg_free(msg);
8014 }
8015 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8016
8017 static int nl80211_netlink_notify(struct notifier_block * nb,
8018                                   unsigned long state,
8019                                   void *_notify)
8020 {
8021         struct netlink_notify *notify = _notify;
8022         struct cfg80211_registered_device *rdev;
8023         struct wireless_dev *wdev;
8024
8025         if (state != NETLINK_URELEASE)
8026                 return NOTIFY_DONE;
8027
8028         rcu_read_lock();
8029
8030         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8031                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8032                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8033                 if (rdev->ap_beacons_nlpid == notify->pid)
8034                         rdev->ap_beacons_nlpid = 0;
8035         }
8036
8037         rcu_read_unlock();
8038
8039         return NOTIFY_DONE;
8040 }
8041
8042 static struct notifier_block nl80211_netlink_notifier = {
8043         .notifier_call = nl80211_netlink_notify,
8044 };
8045
8046 /* initialisation/exit functions */
8047
8048 int nl80211_init(void)
8049 {
8050         int err;
8051
8052         err = genl_register_family_with_ops(&nl80211_fam,
8053                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8054         if (err)
8055                 return err;
8056
8057         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8058         if (err)
8059                 goto err_out;
8060
8061         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8062         if (err)
8063                 goto err_out;
8064
8065         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8066         if (err)
8067                 goto err_out;
8068
8069         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8070         if (err)
8071                 goto err_out;
8072
8073 #ifdef CONFIG_NL80211_TESTMODE
8074         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8075         if (err)
8076                 goto err_out;
8077 #endif
8078
8079         err = netlink_register_notifier(&nl80211_netlink_notifier);
8080         if (err)
8081                 goto err_out;
8082
8083         return 0;
8084  err_out:
8085         genl_unregister_family(&nl80211_fam);
8086         return err;
8087 }
8088
8089 void nl80211_exit(void)
8090 {
8091         netlink_unregister_notifier(&nl80211_netlink_notifier);
8092         genl_unregister_family(&nl80211_fam);
8093 }