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 int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  27                             struct genl_info *info);
  28 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  29                               struct genl_info *info);
  30
  31 /* the netlink family */
  32 static struct genl_family nl80211_fam = {
  33         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  34         .name = "nl80211",      /* have users key off the name instead */
  35         .hdrsize = 0,           /* no private header */
  36         .version = 1,           /* no particular meaning now */
  37         .maxattr = NL80211_ATTR_MAX,
  38         .netnsok = true,
  39         .pre_doit = nl80211_pre_doit,
  40         .post_doit = nl80211_post_doit,
  41 };
  42
  43 /* internal helper: get rdev and dev */
  44 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  45                                        struct cfg80211_registered_device **rdev,
  46                                        struct net_device **dev)
  47 {
  48         struct nlattr **attrs = info->attrs;
  49         int ifindex;
  50
  51         if (!attrs[NL80211_ATTR_IFINDEX])
  52                 return -EINVAL;
  53
  54         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  55         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  56         if (!*dev)
  57                 return -ENODEV;
  58
  59         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  60         if (IS_ERR(*rdev)) {
  61                 dev_put(*dev);
  62                 return PTR_ERR(*rdev);
  63         }
  64
  65         return 0;
  66 }
  67
  68 /* policy for the attributes */
  69 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  70         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  72                                       .len = 20-1 },
  73         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  74         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  75         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  77         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  78         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  79         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  81
  82         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  83         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  84         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  85
  86         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  87         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  88
  89         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  90         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  91                                     .len = WLAN_MAX_KEY_LEN },
  92         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  93         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  94         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  95         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  96         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
  97
  98         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  99         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 100         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 101                                        .len = IEEE80211_MAX_DATA_LEN },
 102         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 103                                        .len = IEEE80211_MAX_DATA_LEN },
 104         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 105         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 106         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 107         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 108                                                .len = NL80211_MAX_SUPP_RATES },
 109         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 110         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 111         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 112         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 113                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 114         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 115
 116         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 117         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 120         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 121         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 122         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 123                                            .len = NL80211_MAX_SUPP_RATES },
 124         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 125
 126         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 127
 128         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 129                                          .len = NL80211_HT_CAPABILITY_LEN },
 130
 131         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 132         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 133                               .len = IEEE80211_MAX_DATA_LEN },
 134         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 135         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 136
 137         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 138                                 .len = IEEE80211_MAX_SSID_LEN },
 139         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 140         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 141         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 142         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 143         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 144         [NL80211_ATTR_STA_FLAGS2] = {
 145                 .len = sizeof(struct nl80211_sta_flag_update),
 146         },
 147         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 149         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 150         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 151         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 152         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 153         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 154         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 155         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 156                                  .len = WLAN_PMKID_LEN },
 157         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 158         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 159         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 160         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 161                                  .len = IEEE80211_MAX_DATA_LEN },
 162         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 163         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 164         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 165         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 166         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 167         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 169         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 170         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 171         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 172         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 173         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 174         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 175 };
 176
 177 /* policy for the key attributes */
 178 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 179         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 180         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 181         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 182         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 183         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 184         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 185         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 186         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 187 };
 188
 189 /* policy for the key default flags */
 190 static const struct nla_policy
 191 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 192         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 193         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 194 };
 195
 196 /* ifidx get helper */
 197 static int nl80211_get_ifidx(struct netlink_callback *cb)
 198 {
 199         int res;
 200
 201         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 202                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 203                           nl80211_policy);
 204         if (res)
 205                 return res;
 206
 207         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 208                 return -EINVAL;
 209
 210         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 211         if (!res)
 212                 return -EINVAL;
 213         return res;
 214 }
 215
 216 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 217                                        struct netlink_callback *cb,
 218                                        struct cfg80211_registered_device **rdev,
 219                                        struct net_device **dev)
 220 {
 221         int ifidx = cb->args[0];
 222         int err;
 223
 224         if (!ifidx)
 225                 ifidx = nl80211_get_ifidx(cb);
 226         if (ifidx < 0)
 227                 return ifidx;
 228
 229         cb->args[0] = ifidx;
 230
 231         rtnl_lock();
 232
 233         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 234         if (!*dev) {
 235                 err = -ENODEV;
 236                 goto out_rtnl;
 237         }
 238
 239         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 240         if (IS_ERR(*rdev)) {
 241                 err = PTR_ERR(*rdev);
 242                 goto out_rtnl;
 243         }
 244
 245         return 0;
 246  out_rtnl:
 247         rtnl_unlock();
 248         return err;
 249 }
 250
 251 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 252 {
 253         cfg80211_unlock_rdev(rdev);
 254         rtnl_unlock();
 255 }
 256
 257 /* IE validation */
 258 static bool is_valid_ie_attr(const struct nlattr *attr)
 259 {
 260         const u8 *pos;
 261         int len;
 262
 263         if (!attr)
 264                 return true;
 265
 266         pos = nla_data(attr);
 267         len = nla_len(attr);
 268
 269         while (len) {
 270                 u8 elemlen;
 271
 272                 if (len < 2)
 273                         return false;
 274                 len -= 2;
 275
 276                 elemlen = pos[1];
 277                 if (elemlen > len)
 278                         return false;
 279
 280                 len -= elemlen;
 281                 pos += 2 + elemlen;
 282         }
 283
 284         return true;
 285 }
 286
 287 /* message building helper */
 288 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 289                                    int flags, u8 cmd)
 290 {
 291         /* since there is no private header just add the generic one */
 292         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 293 }
 294
 295 static int nl80211_msg_put_channel(struct sk_buff *msg,
 296                                    struct ieee80211_channel *chan)
 297 {
 298         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 299                     chan->center_freq);
 300
 301         if (chan->flags & IEEE80211_CHAN_DISABLED)
 302                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 303         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 304                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 305         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 306                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 307         if (chan->flags & IEEE80211_CHAN_RADAR)
 308                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 309
 310         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 311                     DBM_TO_MBM(chan->max_power));
 312
 313         return 0;
 314
 315  nla_put_failure:
 316         return -ENOBUFS;
 317 }
 318
 319 /* netlink command implementations */
 320
 321 struct key_parse {
 322         struct key_params p;
 323         int idx;
 324         int type;
 325         bool def, defmgmt;
 326         bool def_uni, def_multi;
 327 };
 328
 329 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 330 {
 331         struct nlattr *tb[NL80211_KEY_MAX + 1];
 332         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 333                                    nl80211_key_policy);
 334         if (err)
 335                 return err;
 336
 337         k->def = !!tb[NL80211_KEY_DEFAULT];
 338         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 339
 340         if (k->def) {
 341                 k->def_uni = true;
 342                 k->def_multi = true;
 343         }
 344         if (k->defmgmt)
 345                 k->def_multi = true;
 346
 347         if (tb[NL80211_KEY_IDX])
 348                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 349
 350         if (tb[NL80211_KEY_DATA]) {
 351                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 352                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 353         }
 354
 355         if (tb[NL80211_KEY_SEQ]) {
 356                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 357                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 358         }
 359
 360         if (tb[NL80211_KEY_CIPHER])
 361                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 362
 363         if (tb[NL80211_KEY_TYPE]) {
 364                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 365                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 366                         return -EINVAL;
 367         }
 368
 369         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 370                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 371                 int err = nla_parse_nested(kdt,
 372                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 373                                            tb[NL80211_KEY_DEFAULT_TYPES],
 374                                            nl80211_key_default_policy);
 375                 if (err)
 376                         return err;
 377
 378                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 379                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 380         }
 381
 382         return 0;
 383 }
 384
 385 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 386 {
 387         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 388                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 389                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 390         }
 391
 392         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 393                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 394                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 395         }
 396
 397         if (info->attrs[NL80211_ATTR_KEY_IDX])
 398                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 399
 400         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 401                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 402
 403         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 404         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 405
 406         if (k->def) {
 407                 k->def_uni = true;
 408                 k->def_multi = true;
 409         }
 410         if (k->defmgmt)
 411                 k->def_multi = true;
 412
 413         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 414                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 415                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 416                         return -EINVAL;
 417         }
 418
 419         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 420                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 421                 int err = nla_parse_nested(
 422                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 423                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 424                                 nl80211_key_default_policy);
 425                 if (err)
 426                         return err;
 427
 428                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 429                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 436 {
 437         int err;
 438
 439         memset(k, 0, sizeof(*k));
 440         k->idx = -1;
 441         k->type = -1;
 442
 443         if (info->attrs[NL80211_ATTR_KEY])
 444                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 445         else
 446                 err = nl80211_parse_key_old(info, k);
 447
 448         if (err)
 449                 return err;
 450
 451         if (k->def && k->defmgmt)
 452                 return -EINVAL;
 453
 454         if (k->defmgmt) {
 455                 if (k->def_uni || !k->def_multi)
 456                         return -EINVAL;
 457         }
 458
 459         if (k->idx != -1) {
 460                 if (k->defmgmt) {
 461                         if (k->idx < 4 || k->idx > 5)
 462                                 return -EINVAL;
 463                 } else if (k->def) {
 464                         if (k->idx < 0 || k->idx > 3)
 465                                 return -EINVAL;
 466                 } else {
 467                         if (k->idx < 0 || k->idx > 5)
 468                                 return -EINVAL;
 469                 }
 470         }
 471
 472         return 0;
 473 }
 474
 475 static struct cfg80211_cached_keys *
 476 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 477                        struct nlattr *keys)
 478 {
 479         struct key_parse parse;
 480         struct nlattr *key;
 481         struct cfg80211_cached_keys *result;
 482         int rem, err, def = 0;
 483
 484         result = kzalloc(sizeof(*result), GFP_KERNEL);
 485         if (!result)
 486                 return ERR_PTR(-ENOMEM);
 487
 488         result->def = -1;
 489         result->defmgmt = -1;
 490
 491         nla_for_each_nested(key, keys, rem) {
 492                 memset(&parse, 0, sizeof(parse));
 493                 parse.idx = -1;
 494
 495                 err = nl80211_parse_key_new(key, &parse);
 496                 if (err)
 497                         goto error;
 498                 err = -EINVAL;
 499                 if (!parse.p.key)
 500                         goto error;
 501                 if (parse.idx < 0 || parse.idx > 4)
 502                         goto error;
 503                 if (parse.def) {
 504                         if (def)
 505                                 goto error;
 506                         def = 1;
 507                         result->def = parse.idx;
 508                         if (!parse.def_uni || !parse.def_multi)
 509                                 goto error;
 510                 } else if (parse.defmgmt)
 511                         goto error;
 512                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 513                                                      parse.idx, false, NULL);
 514                 if (err)
 515                         goto error;
 516                 result->params[parse.idx].cipher = parse.p.cipher;
 517                 result->params[parse.idx].key_len = parse.p.key_len;
 518                 result->params[parse.idx].key = result->data[parse.idx];
 519                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 520         }
 521
 522         return result;
 523  error:
 524         kfree(result);
 525         return ERR_PTR(err);
 526 }
 527
 528 static int nl80211_key_allowed(struct wireless_dev *wdev)
 529 {
 530         ASSERT_WDEV_LOCK(wdev);
 531
 532         switch (wdev->iftype) {
 533         case NL80211_IFTYPE_AP:
 534         case NL80211_IFTYPE_AP_VLAN:
 535         case NL80211_IFTYPE_P2P_GO:
 536                 break;
 537         case NL80211_IFTYPE_ADHOC:
 538                 if (!wdev->current_bss)
 539                         return -ENOLINK;
 540                 break;
 541         case NL80211_IFTYPE_STATION:
 542         case NL80211_IFTYPE_P2P_CLIENT:
 543                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 544                         return -ENOLINK;
 545                 break;
 546         default:
 547                 return -EINVAL;
 548         }
 549
 550         return 0;
 551 }
 552
 553 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 554                               struct cfg80211_registered_device *dev)
 555 {
 556         void *hdr;
 557         struct nlattr *nl_bands, *nl_band;
 558         struct nlattr *nl_freqs, *nl_freq;
 559         struct nlattr *nl_rates, *nl_rate;
 560         struct nlattr *nl_modes;
 561         struct nlattr *nl_cmds;
 562         enum ieee80211_band band;
 563         struct ieee80211_channel *chan;
 564         struct ieee80211_rate *rate;
 565         int i;
 566         u16 ifmodes = dev->wiphy.interface_modes;
 567         const struct ieee80211_txrx_stypes *mgmt_stypes =
 568                                 dev->wiphy.mgmt_stypes;
 569
 570         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 571         if (!hdr)
 572                 return -1;
 573
 574         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 575         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 576
 577         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 578                     cfg80211_rdev_list_generation);
 579
 580         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 581                    dev->wiphy.retry_short);
 582         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 583                    dev->wiphy.retry_long);
 584         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 585                     dev->wiphy.frag_threshold);
 586         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 587                     dev->wiphy.rts_threshold);
 588         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 589                     dev->wiphy.coverage_class);
 590         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 591                    dev->wiphy.max_scan_ssids);
 592         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 593                     dev->wiphy.max_scan_ie_len);
 594
 595         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 596                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 597
 598         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 599                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 600                 dev->wiphy.cipher_suites);
 601
 602         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 603                    dev->wiphy.max_num_pmkids);
 604
 605         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 606                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 607
 608         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 609                     dev->wiphy.available_antennas_tx);
 610         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 611                     dev->wiphy.available_antennas_rx);
 612
 613         if ((dev->wiphy.available_antennas_tx ||
 614              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 615                 u32 tx_ant = 0, rx_ant = 0;
 616                 int res;
 617                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 618                 if (!res) {
 619                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 620                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 621                 }
 622         }
 623
 624         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 625         if (!nl_modes)
 626                 goto nla_put_failure;
 627
 628         i = 0;
 629         while (ifmodes) {
 630                 if (ifmodes & 1)
 631                         NLA_PUT_FLAG(msg, i);
 632                 ifmodes >>= 1;
 633                 i++;
 634         }
 635
 636         nla_nest_end(msg, nl_modes);
 637
 638         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 639         if (!nl_bands)
 640                 goto nla_put_failure;
 641
 642         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 643                 if (!dev->wiphy.bands[band])
 644                         continue;
 645
 646                 nl_band = nla_nest_start(msg, band);
 647                 if (!nl_band)
 648                         goto nla_put_failure;
 649
 650                 /* add HT info */
 651                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 652                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 653                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 654                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 655                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 656                                 dev->wiphy.bands[band]->ht_cap.cap);
 657                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 658                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 659                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 660                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 661                 }
 662
 663                 /* add frequencies */
 664                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 665                 if (!nl_freqs)
 666                         goto nla_put_failure;
 667
 668                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 669                         nl_freq = nla_nest_start(msg, i);
 670                         if (!nl_freq)
 671                                 goto nla_put_failure;
 672
 673                         chan = &dev->wiphy.bands[band]->channels[i];
 674
 675                         if (nl80211_msg_put_channel(msg, chan))
 676                                 goto nla_put_failure;
 677
 678                         nla_nest_end(msg, nl_freq);
 679                 }
 680
 681                 nla_nest_end(msg, nl_freqs);
 682
 683                 /* add bitrates */
 684                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 685                 if (!nl_rates)
 686                         goto nla_put_failure;
 687
 688                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 689                         nl_rate = nla_nest_start(msg, i);
 690                         if (!nl_rate)
 691                                 goto nla_put_failure;
 692
 693                         rate = &dev->wiphy.bands[band]->bitrates[i];
 694                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 695                                     rate->bitrate);
 696                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 697                                 NLA_PUT_FLAG(msg,
 698                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 699
 700                         nla_nest_end(msg, nl_rate);
 701                 }
 702
 703                 nla_nest_end(msg, nl_rates);
 704
 705                 nla_nest_end(msg, nl_band);
 706         }
 707         nla_nest_end(msg, nl_bands);
 708
 709         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 710         if (!nl_cmds)
 711                 goto nla_put_failure;
 712
 713         i = 0;
 714 #define CMD(op, n)                                              \
 715          do {                                                   \
 716                 if (dev->ops->op) {                             \
 717                         i++;                                    \
 718                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 719                 }                                               \
 720         } while (0)
 721
 722         CMD(add_virtual_intf, NEW_INTERFACE);
 723         CMD(change_virtual_intf, SET_INTERFACE);
 724         CMD(add_key, NEW_KEY);
 725         CMD(add_beacon, NEW_BEACON);
 726         CMD(add_station, NEW_STATION);
 727         CMD(add_mpath, NEW_MPATH);
 728         CMD(update_mesh_config, SET_MESH_CONFIG);
 729         CMD(change_bss, SET_BSS);
 730         CMD(auth, AUTHENTICATE);
 731         CMD(assoc, ASSOCIATE);
 732         CMD(deauth, DEAUTHENTICATE);
 733         CMD(disassoc, DISASSOCIATE);
 734         CMD(join_ibss, JOIN_IBSS);
 735         CMD(join_mesh, JOIN_MESH);
 736         CMD(set_pmksa, SET_PMKSA);
 737         CMD(del_pmksa, DEL_PMKSA);
 738         CMD(flush_pmksa, FLUSH_PMKSA);
 739         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 740         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 741         CMD(mgmt_tx, FRAME);
 742         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 743         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 744                 i++;
 745                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 746         }
 747         CMD(set_channel, SET_CHANNEL);
 748         CMD(set_wds_peer, SET_WDS_PEER);
 749
 750 #undef CMD
 751
 752         if (dev->ops->connect || dev->ops->auth) {
 753                 i++;
 754                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 755         }
 756
 757         if (dev->ops->disconnect || dev->ops->deauth) {
 758                 i++;
 759                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 760         }
 761
 762         nla_nest_end(msg, nl_cmds);
 763
 764         if (dev->ops->remain_on_channel)
 765                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 766                             dev->wiphy.max_remain_on_channel_duration);
 767
 768         /* for now at least assume all drivers have it */
 769         if (dev->ops->mgmt_tx)
 770                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 771
 772         if (mgmt_stypes) {
 773                 u16 stypes;
 774                 struct nlattr *nl_ftypes, *nl_ifs;
 775                 enum nl80211_iftype ift;
 776
 777                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 778                 if (!nl_ifs)
 779                         goto nla_put_failure;
 780
 781                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 782                         nl_ftypes = nla_nest_start(msg, ift);
 783                         if (!nl_ftypes)
 784                                 goto nla_put_failure;
 785                         i = 0;
 786                         stypes = mgmt_stypes[ift].tx;
 787                         while (stypes) {
 788                                 if (stypes & 1)
 789                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 790                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 791                                 stypes >>= 1;
 792                                 i++;
 793                         }
 794                         nla_nest_end(msg, nl_ftypes);
 795                 }
 796
 797                 nla_nest_end(msg, nl_ifs);
 798
 799                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 800                 if (!nl_ifs)
 801                         goto nla_put_failure;
 802
 803                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 804                         nl_ftypes = nla_nest_start(msg, ift);
 805                         if (!nl_ftypes)
 806                                 goto nla_put_failure;
 807                         i = 0;
 808                         stypes = mgmt_stypes[ift].rx;
 809                         while (stypes) {
 810                                 if (stypes & 1)
 811                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 812                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 813                                 stypes >>= 1;
 814                                 i++;
 815                         }
 816                         nla_nest_end(msg, nl_ftypes);
 817                 }
 818                 nla_nest_end(msg, nl_ifs);
 819         }
 820
 821         return genlmsg_end(msg, hdr);
 822
 823  nla_put_failure:
 824         genlmsg_cancel(msg, hdr);
 825         return -EMSGSIZE;
 826 }
 827
 828 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 829 {
 830         int idx = 0;
 831         int start = cb->args[0];
 832         struct cfg80211_registered_device *dev;
 833
 834         mutex_lock(&cfg80211_mutex);
 835         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 836                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 837                         continue;
 838                 if (++idx <= start)
 839                         continue;
 840                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 841                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 842                                        dev) < 0) {
 843                         idx--;
 844                         break;
 845                 }
 846         }
 847         mutex_unlock(&cfg80211_mutex);
 848
 849         cb->args[0] = idx;
 850
 851         return skb->len;
 852 }
 853
 854 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 855 {
 856         struct sk_buff *msg;
 857         struct cfg80211_registered_device *dev = info->user_ptr[0];
 858
 859         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 860         if (!msg)
 861                 return -ENOMEM;
 862
 863         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 864                 nlmsg_free(msg);
 865                 return -ENOBUFS;
 866         }
 867
 868         return genlmsg_reply(msg, info);
 869 }
 870
 871 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 872         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 873         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 874         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 875         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 876         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 877 };
 878
 879 static int parse_txq_params(struct nlattr *tb[],
 880                             struct ieee80211_txq_params *txq_params)
 881 {
 882         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 883             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 884             !tb[NL80211_TXQ_ATTR_AIFS])
 885                 return -EINVAL;
 886
 887         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 888         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 889         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 890         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 891         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 892
 893         return 0;
 894 }
 895
 896 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 897 {
 898         /*
 899          * You can only set the channel explicitly for AP, mesh
 900          * and WDS type interfaces; all others have their channel
 901          * managed via their respective "establish a connection"
 902          * command (connect, join, ...)
 903          *
 904          * Monitors are special as they are normally slaved to
 905          * whatever else is going on, so they behave as though
 906          * you tried setting the wiphy channel itself.
 907          */
 908         return !wdev ||
 909                 wdev->iftype == NL80211_IFTYPE_AP ||
 910                 wdev->iftype == NL80211_IFTYPE_WDS ||
 911                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 912                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
 913                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
 914 }
 915
 916 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 917                                  struct wireless_dev *wdev,
 918                                  struct genl_info *info)
 919 {
 920         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 921         u32 freq;
 922         int result;
 923
 924         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 925                 return -EINVAL;
 926
 927         if (!nl80211_can_set_dev_channel(wdev))
 928                 return -EOPNOTSUPP;
 929
 930         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 931                 channel_type = nla_get_u32(info->attrs[
 932                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 933                 if (channel_type != NL80211_CHAN_NO_HT &&
 934                     channel_type != NL80211_CHAN_HT20 &&
 935                     channel_type != NL80211_CHAN_HT40PLUS &&
 936                     channel_type != NL80211_CHAN_HT40MINUS)
 937                         return -EINVAL;
 938         }
 939
 940         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 941
 942         mutex_lock(&rdev->devlist_mtx);
 943         if (wdev) {
 944                 wdev_lock(wdev);
 945                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 946                 wdev_unlock(wdev);
 947         } else {
 948                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 949         }
 950         mutex_unlock(&rdev->devlist_mtx);
 951
 952         return result;
 953 }
 954
 955 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 956 {
 957         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 958         struct net_device *netdev = info->user_ptr[1];
 959
 960         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 961 }
 962
 963 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
 964 {
 965         struct cfg80211_registered_device *rdev = info->user_ptr[0];
 966         struct net_device *dev = info->user_ptr[1];
 967         struct wireless_dev *wdev = dev->ieee80211_ptr;
 968         const u8 *bssid;
 969
 970         if (!info->attrs[NL80211_ATTR_MAC])
 971                 return -EINVAL;
 972
 973         if (netif_running(dev))
 974                 return -EBUSY;
 975
 976         if (!rdev->ops->set_wds_peer)
 977                 return -EOPNOTSUPP;
 978
 979         if (wdev->iftype != NL80211_IFTYPE_WDS)
 980                 return -EOPNOTSUPP;
 981
 982         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 983         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
 984 }
 985
 986
 987 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 988 {
 989         struct cfg80211_registered_device *rdev;
 990         struct net_device *netdev = NULL;
 991         struct wireless_dev *wdev;
 992         int result = 0, rem_txq_params = 0;
 993         struct nlattr *nl_txq_params;
 994         u32 changed;
 995         u8 retry_short = 0, retry_long = 0;
 996         u32 frag_threshold = 0, rts_threshold = 0;
 997         u8 coverage_class = 0;
 998
 999         /*
1000          * Try to find the wiphy and netdev. Normally this
1001          * function shouldn't need the netdev, but this is
1002          * done for backward compatibility -- previously
1003          * setting the channel was done per wiphy, but now
1004          * it is per netdev. Previous userland like hostapd
1005          * also passed a netdev to set_wiphy, so that it is
1006          * possible to let that go to the right netdev!
1007          */
1008         mutex_lock(&cfg80211_mutex);
1009
1010         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1011                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1012
1013                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1014                 if (netdev && netdev->ieee80211_ptr) {
1015                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1016                         mutex_lock(&rdev->mtx);
1017                 } else
1018                         netdev = NULL;
1019         }
1020
1021         if (!netdev) {
1022                 rdev = __cfg80211_rdev_from_info(info);
1023                 if (IS_ERR(rdev)) {
1024                         mutex_unlock(&cfg80211_mutex);
1025                         return PTR_ERR(rdev);
1026                 }
1027                 wdev = NULL;
1028                 netdev = NULL;
1029                 result = 0;
1030
1031                 mutex_lock(&rdev->mtx);
1032         } else if (netif_running(netdev) &&
1033                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1034                 wdev = netdev->ieee80211_ptr;
1035         else
1036                 wdev = NULL;
1037
1038         /*
1039          * end workaround code, by now the rdev is available
1040          * and locked, and wdev may or may not be NULL.
1041          */
1042
1043         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1044                 result = cfg80211_dev_rename(
1045                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1046
1047         mutex_unlock(&cfg80211_mutex);
1048
1049         if (result)
1050                 goto bad_res;
1051
1052         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1053                 struct ieee80211_txq_params txq_params;
1054                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1055
1056                 if (!rdev->ops->set_txq_params) {
1057                         result = -EOPNOTSUPP;
1058                         goto bad_res;
1059                 }
1060
1061                 nla_for_each_nested(nl_txq_params,
1062                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1063                                     rem_txq_params) {
1064                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1065                                   nla_data(nl_txq_params),
1066                                   nla_len(nl_txq_params),
1067                                   txq_params_policy);
1068                         result = parse_txq_params(tb, &txq_params);
1069                         if (result)
1070                                 goto bad_res;
1071
1072                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1073                                                            &txq_params);
1074                         if (result)
1075                                 goto bad_res;
1076                 }
1077         }
1078
1079         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1080                 result = __nl80211_set_channel(rdev, wdev, info);
1081                 if (result)
1082                         goto bad_res;
1083         }
1084
1085         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1086                 enum nl80211_tx_power_setting type;
1087                 int idx, mbm = 0;
1088
1089                 if (!rdev->ops->set_tx_power) {
1090                         result = -EOPNOTSUPP;
1091                         goto bad_res;
1092                 }
1093
1094                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1095                 type = nla_get_u32(info->attrs[idx]);
1096
1097                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1098                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1099                         result = -EINVAL;
1100                         goto bad_res;
1101                 }
1102
1103                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1104                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1105                         mbm = nla_get_u32(info->attrs[idx]);
1106                 }
1107
1108                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1109                 if (result)
1110                         goto bad_res;
1111         }
1112
1113         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1114             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1115                 u32 tx_ant, rx_ant;
1116                 if ((!rdev->wiphy.available_antennas_tx &&
1117                      !rdev->wiphy.available_antennas_rx) ||
1118                     !rdev->ops->set_antenna) {
1119                         result = -EOPNOTSUPP;
1120                         goto bad_res;
1121                 }
1122
1123                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1124                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1125
1126                 /* reject antenna configurations which don't match the
1127                  * available antenna masks, except for the "all" mask */
1128                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1129                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1130                         result = -EINVAL;
1131                         goto bad_res;
1132                 }
1133
1134                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1135                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1136
1137                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1138                 if (result)
1139                         goto bad_res;
1140         }
1141
1142         changed = 0;
1143
1144         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1145                 retry_short = nla_get_u8(
1146                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1147                 if (retry_short == 0) {
1148                         result = -EINVAL;
1149                         goto bad_res;
1150                 }
1151                 changed |= WIPHY_PARAM_RETRY_SHORT;
1152         }
1153
1154         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1155                 retry_long = nla_get_u8(
1156                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1157                 if (retry_long == 0) {
1158                         result = -EINVAL;
1159                         goto bad_res;
1160                 }
1161                 changed |= WIPHY_PARAM_RETRY_LONG;
1162         }
1163
1164         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1165                 frag_threshold = nla_get_u32(
1166                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1167                 if (frag_threshold < 256) {
1168                         result = -EINVAL;
1169                         goto bad_res;
1170                 }
1171                 if (frag_threshold != (u32) -1) {
1172                         /*
1173                          * Fragments (apart from the last one) are required to
1174                          * have even length. Make the fragmentation code
1175                          * simpler by stripping LSB should someone try to use
1176                          * odd threshold value.
1177                          */
1178                         frag_threshold &= ~0x1;
1179                 }
1180                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1181         }
1182
1183         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1184                 rts_threshold = nla_get_u32(
1185                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1186                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1187         }
1188
1189         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1190                 coverage_class = nla_get_u8(
1191                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1192                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1193         }
1194
1195         if (changed) {
1196                 u8 old_retry_short, old_retry_long;
1197                 u32 old_frag_threshold, old_rts_threshold;
1198                 u8 old_coverage_class;
1199
1200                 if (!rdev->ops->set_wiphy_params) {
1201                         result = -EOPNOTSUPP;
1202                         goto bad_res;
1203                 }
1204
1205                 old_retry_short = rdev->wiphy.retry_short;
1206                 old_retry_long = rdev->wiphy.retry_long;
1207                 old_frag_threshold = rdev->wiphy.frag_threshold;
1208                 old_rts_threshold = rdev->wiphy.rts_threshold;
1209                 old_coverage_class = rdev->wiphy.coverage_class;
1210
1211                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1212                         rdev->wiphy.retry_short = retry_short;
1213                 if (changed & WIPHY_PARAM_RETRY_LONG)
1214                         rdev->wiphy.retry_long = retry_long;
1215                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1216                         rdev->wiphy.frag_threshold = frag_threshold;
1217                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1218                         rdev->wiphy.rts_threshold = rts_threshold;
1219                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1220                         rdev->wiphy.coverage_class = coverage_class;
1221
1222                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1223                 if (result) {
1224                         rdev->wiphy.retry_short = old_retry_short;
1225                         rdev->wiphy.retry_long = old_retry_long;
1226                         rdev->wiphy.frag_threshold = old_frag_threshold;
1227                         rdev->wiphy.rts_threshold = old_rts_threshold;
1228                         rdev->wiphy.coverage_class = old_coverage_class;
1229                 }
1230         }
1231
1232  bad_res:
1233         mutex_unlock(&rdev->mtx);
1234         if (netdev)
1235                 dev_put(netdev);
1236         return result;
1237 }
1238
1239
1240 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1241                               struct cfg80211_registered_device *rdev,
1242                               struct net_device *dev)
1243 {
1244         void *hdr;
1245
1246         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1247         if (!hdr)
1248                 return -1;
1249
1250         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1251         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1252         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1253         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1254
1255         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1256                     rdev->devlist_generation ^
1257                         (cfg80211_rdev_list_generation << 2));
1258
1259         return genlmsg_end(msg, hdr);
1260
1261  nla_put_failure:
1262         genlmsg_cancel(msg, hdr);
1263         return -EMSGSIZE;
1264 }
1265
1266 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1267 {
1268         int wp_idx = 0;
1269         int if_idx = 0;
1270         int wp_start = cb->args[0];
1271         int if_start = cb->args[1];
1272         struct cfg80211_registered_device *rdev;
1273         struct wireless_dev *wdev;
1274
1275         mutex_lock(&cfg80211_mutex);
1276         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1277                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1278                         continue;
1279                 if (wp_idx < wp_start) {
1280                         wp_idx++;
1281                         continue;
1282                 }
1283                 if_idx = 0;
1284
1285                 mutex_lock(&rdev->devlist_mtx);
1286                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1287                         if (if_idx < if_start) {
1288                                 if_idx++;
1289                                 continue;
1290                         }
1291                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1292                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1293                                                rdev, wdev->netdev) < 0) {
1294                                 mutex_unlock(&rdev->devlist_mtx);
1295                                 goto out;
1296                         }
1297                         if_idx++;
1298                 }
1299                 mutex_unlock(&rdev->devlist_mtx);
1300
1301                 wp_idx++;
1302         }
1303  out:
1304         mutex_unlock(&cfg80211_mutex);
1305
1306         cb->args[0] = wp_idx;
1307         cb->args[1] = if_idx;
1308
1309         return skb->len;
1310 }
1311
1312 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1313 {
1314         struct sk_buff *msg;
1315         struct cfg80211_registered_device *dev = info->user_ptr[0];
1316         struct net_device *netdev = info->user_ptr[1];
1317
1318         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1319         if (!msg)
1320                 return -ENOMEM;
1321
1322         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1323                                dev, netdev) < 0) {
1324                 nlmsg_free(msg);
1325                 return -ENOBUFS;
1326         }
1327
1328         return genlmsg_reply(msg, info);
1329 }
1330
1331 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1332         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1333         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1334         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1335         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1336         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1337 };
1338
1339 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1340 {
1341         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1342         int flag;
1343
1344         *mntrflags = 0;
1345
1346         if (!nla)
1347                 return -EINVAL;
1348
1349         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1350                              nla, mntr_flags_policy))
1351                 return -EINVAL;
1352
1353         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1354                 if (flags[flag])
1355                         *mntrflags |= (1<<flag);
1356
1357         return 0;
1358 }
1359
1360 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1361                                struct net_device *netdev, u8 use_4addr,
1362                                enum nl80211_iftype iftype)
1363 {
1364         if (!use_4addr) {
1365                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1366                         return -EBUSY;
1367                 return 0;
1368         }
1369
1370         switch (iftype) {
1371         case NL80211_IFTYPE_AP_VLAN:
1372                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1373                         return 0;
1374                 break;
1375         case NL80211_IFTYPE_STATION:
1376                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1377                         return 0;
1378                 break;
1379         default:
1380                 break;
1381         }
1382
1383         return -EOPNOTSUPP;
1384 }
1385
1386 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1387 {
1388         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1389         struct vif_params params;
1390         int err;
1391         enum nl80211_iftype otype, ntype;
1392         struct net_device *dev = info->user_ptr[1];
1393         u32 _flags, *flags = NULL;
1394         bool change = false;
1395
1396         memset(&params, 0, sizeof(params));
1397
1398         otype = ntype = dev->ieee80211_ptr->iftype;
1399
1400         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1401                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1402                 if (otype != ntype)
1403                         change = true;
1404                 if (ntype > NL80211_IFTYPE_MAX)
1405                         return -EINVAL;
1406         }
1407
1408         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1409                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1410
1411                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1412                         return -EINVAL;
1413                 if (netif_running(dev))
1414                         return -EBUSY;
1415
1416                 wdev_lock(wdev);
1417                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1418                              IEEE80211_MAX_MESH_ID_LEN);
1419                 wdev->mesh_id_up_len =
1420                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1421                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1422                        wdev->mesh_id_up_len);
1423                 wdev_unlock(wdev);
1424         }
1425
1426         if (info->attrs[NL80211_ATTR_4ADDR]) {
1427                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1428                 change = true;
1429                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1430                 if (err)
1431                         return err;
1432         } else {
1433                 params.use_4addr = -1;
1434         }
1435
1436         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1437                 if (ntype != NL80211_IFTYPE_MONITOR)
1438                         return -EINVAL;
1439                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1440                                           &_flags);
1441                 if (err)
1442                         return err;
1443
1444                 flags = &_flags;
1445                 change = true;
1446         }
1447
1448         if (change)
1449                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1450         else
1451                 err = 0;
1452
1453         if (!err && params.use_4addr != -1)
1454                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1455
1456         return err;
1457 }
1458
1459 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1460 {
1461         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1462         struct vif_params params;
1463         struct net_device *dev;
1464         int err;
1465         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1466         u32 flags;
1467
1468         memset(&params, 0, sizeof(params));
1469
1470         if (!info->attrs[NL80211_ATTR_IFNAME])
1471                 return -EINVAL;
1472
1473         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1474                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1475                 if (type > NL80211_IFTYPE_MAX)
1476                         return -EINVAL;
1477         }
1478
1479         if (!rdev->ops->add_virtual_intf ||
1480             !(rdev->wiphy.interface_modes & (1 << type)))
1481                 return -EOPNOTSUPP;
1482
1483         if (info->attrs[NL80211_ATTR_4ADDR]) {
1484                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1485                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1486                 if (err)
1487                         return err;
1488         }
1489
1490         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1491                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1492                                   &flags);
1493         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1494                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1495                 type, err ? NULL : &flags, &params);
1496         if (IS_ERR(dev))
1497                 return PTR_ERR(dev);
1498
1499         if (type == NL80211_IFTYPE_MESH_POINT &&
1500             info->attrs[NL80211_ATTR_MESH_ID]) {
1501                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1502
1503                 wdev_lock(wdev);
1504                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1505                              IEEE80211_MAX_MESH_ID_LEN);
1506                 wdev->mesh_id_up_len =
1507                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1508                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1509                        wdev->mesh_id_up_len);
1510                 wdev_unlock(wdev);
1511         }
1512
1513         return 0;
1514 }
1515
1516 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1517 {
1518         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1519         struct net_device *dev = info->user_ptr[1];
1520
1521         if (!rdev->ops->del_virtual_intf)
1522                 return -EOPNOTSUPP;
1523
1524         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1525 }
1526
1527 struct get_key_cookie {
1528         struct sk_buff *msg;
1529         int error;
1530         int idx;
1531 };
1532
1533 static void get_key_callback(void *c, struct key_params *params)
1534 {
1535         struct nlattr *key;
1536         struct get_key_cookie *cookie = c;
1537
1538         if (params->key)
1539                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1540                         params->key_len, params->key);
1541
1542         if (params->seq)
1543                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1544                         params->seq_len, params->seq);
1545
1546         if (params->cipher)
1547                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1548                             params->cipher);
1549
1550         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1551         if (!key)
1552                 goto nla_put_failure;
1553
1554         if (params->key)
1555                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1556                         params->key_len, params->key);
1557
1558         if (params->seq)
1559                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1560                         params->seq_len, params->seq);
1561
1562         if (params->cipher)
1563                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1564                             params->cipher);
1565
1566         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1567
1568         nla_nest_end(cookie->msg, key);
1569
1570         return;
1571  nla_put_failure:
1572         cookie->error = 1;
1573 }
1574
1575 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1576 {
1577         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1578         int err;
1579         struct net_device *dev = info->user_ptr[1];
1580         u8 key_idx = 0;
1581         const u8 *mac_addr = NULL;
1582         bool pairwise;
1583         struct get_key_cookie cookie = {
1584                 .error = 0,
1585         };
1586         void *hdr;
1587         struct sk_buff *msg;
1588
1589         if (info->attrs[NL80211_ATTR_KEY_IDX])
1590                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1591
1592         if (key_idx > 5)
1593                 return -EINVAL;
1594
1595         if (info->attrs[NL80211_ATTR_MAC])
1596                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1597
1598         pairwise = !!mac_addr;
1599         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1600                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1601                 if (kt >= NUM_NL80211_KEYTYPES)
1602                         return -EINVAL;
1603                 if (kt != NL80211_KEYTYPE_GROUP &&
1604                     kt != NL80211_KEYTYPE_PAIRWISE)
1605                         return -EINVAL;
1606                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1607         }
1608
1609         if (!rdev->ops->get_key)
1610                 return -EOPNOTSUPP;
1611
1612         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1613         if (!msg)
1614                 return -ENOMEM;
1615
1616         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1617                              NL80211_CMD_NEW_KEY);
1618         if (IS_ERR(hdr))
1619                 return PTR_ERR(hdr);
1620
1621         cookie.msg = msg;
1622         cookie.idx = key_idx;
1623
1624         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1625         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1626         if (mac_addr)
1627                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1628
1629         if (pairwise && mac_addr &&
1630             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1631                 return -ENOENT;
1632
1633         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1634                                  mac_addr, &cookie, get_key_callback);
1635
1636         if (err)
1637                 goto free_msg;
1638
1639         if (cookie.error)
1640                 goto nla_put_failure;
1641
1642         genlmsg_end(msg, hdr);
1643         return genlmsg_reply(msg, info);
1644
1645  nla_put_failure:
1646         err = -ENOBUFS;
1647  free_msg:
1648         nlmsg_free(msg);
1649         return err;
1650 }
1651
1652 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1653 {
1654         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1655         struct key_parse key;
1656         int err;
1657         struct net_device *dev = info->user_ptr[1];
1658
1659         err = nl80211_parse_key(info, &key);
1660         if (err)
1661                 return err;
1662
1663         if (key.idx < 0)
1664                 return -EINVAL;
1665
1666         /* only support setting default key */
1667         if (!key.def && !key.defmgmt)
1668                 return -EINVAL;
1669
1670         wdev_lock(dev->ieee80211_ptr);
1671
1672         if (key.def) {
1673                 if (!rdev->ops->set_default_key) {
1674                         err = -EOPNOTSUPP;
1675                         goto out;
1676                 }
1677
1678                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1679                 if (err)
1680                         goto out;
1681
1682                 if (!(rdev->wiphy.flags &
1683                                 WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS)) {
1684                         if (!key.def_uni || !key.def_multi) {
1685                                 err = -EOPNOTSUPP;
1686                                 goto out;
1687                         }
1688                 }
1689
1690                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1691                                                  key.def_uni, key.def_multi);
1692
1693                 if (err)
1694                         goto out;
1695
1696 #ifdef CONFIG_CFG80211_WEXT
1697                 dev->ieee80211_ptr->wext.default_key = key.idx;
1698 #endif
1699         } else {
1700                 if (key.def_uni || !key.def_multi) {
1701                         err = -EINVAL;
1702                         goto out;
1703                 }
1704
1705                 if (!rdev->ops->set_default_mgmt_key) {
1706                         err = -EOPNOTSUPP;
1707                         goto out;
1708                 }
1709
1710                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1711                 if (err)
1712                         goto out;
1713
1714                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1715                                                       dev, key.idx);
1716                 if (err)
1717                         goto out;
1718
1719 #ifdef CONFIG_CFG80211_WEXT
1720                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1721 #endif
1722         }
1723
1724  out:
1725         wdev_unlock(dev->ieee80211_ptr);
1726
1727         return err;
1728 }
1729
1730 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1731 {
1732         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1733         int err;
1734         struct net_device *dev = info->user_ptr[1];
1735         struct key_parse key;
1736         const u8 *mac_addr = NULL;
1737
1738         err = nl80211_parse_key(info, &key);
1739         if (err)
1740                 return err;
1741
1742         if (!key.p.key)
1743                 return -EINVAL;
1744
1745         if (info->attrs[NL80211_ATTR_MAC])
1746                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1747
1748         if (key.type == -1) {
1749                 if (mac_addr)
1750                         key.type = NL80211_KEYTYPE_PAIRWISE;
1751                 else
1752                         key.type = NL80211_KEYTYPE_GROUP;
1753         }
1754
1755         /* for now */
1756         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1757             key.type != NL80211_KEYTYPE_GROUP)
1758                 return -EINVAL;
1759
1760         if (!rdev->ops->add_key)
1761                 return -EOPNOTSUPP;
1762
1763         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1764                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1765                                            mac_addr))
1766                 return -EINVAL;
1767
1768         wdev_lock(dev->ieee80211_ptr);
1769         err = nl80211_key_allowed(dev->ieee80211_ptr);
1770         if (!err)
1771                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1772                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1773                                          mac_addr, &key.p);
1774         wdev_unlock(dev->ieee80211_ptr);
1775
1776         return err;
1777 }
1778
1779 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1780 {
1781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1782         int err;
1783         struct net_device *dev = info->user_ptr[1];
1784         u8 *mac_addr = NULL;
1785         struct key_parse key;
1786
1787         err = nl80211_parse_key(info, &key);
1788         if (err)
1789                 return err;
1790
1791         if (info->attrs[NL80211_ATTR_MAC])
1792                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1793
1794         if (key.type == -1) {
1795                 if (mac_addr)
1796                         key.type = NL80211_KEYTYPE_PAIRWISE;
1797                 else
1798                         key.type = NL80211_KEYTYPE_GROUP;
1799         }
1800
1801         /* for now */
1802         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1803             key.type != NL80211_KEYTYPE_GROUP)
1804                 return -EINVAL;
1805
1806         if (!rdev->ops->del_key)
1807                 return -EOPNOTSUPP;
1808
1809         wdev_lock(dev->ieee80211_ptr);
1810         err = nl80211_key_allowed(dev->ieee80211_ptr);
1811
1812         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1813             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1814                 err = -ENOENT;
1815
1816         if (!err)
1817                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1818                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1819                                          mac_addr);
1820
1821 #ifdef CONFIG_CFG80211_WEXT
1822         if (!err) {
1823                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1824                         dev->ieee80211_ptr->wext.default_key = -1;
1825                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1826                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1827         }
1828 #endif
1829         wdev_unlock(dev->ieee80211_ptr);
1830
1831         return err;
1832 }
1833
1834 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1835 {
1836         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1837                     struct beacon_parameters *info);
1838         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1839         struct net_device *dev = info->user_ptr[1];
1840         struct beacon_parameters params;
1841         int haveinfo = 0;
1842
1843         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1844                 return -EINVAL;
1845
1846         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1847             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1848                 return -EOPNOTSUPP;
1849
1850         switch (info->genlhdr->cmd) {
1851         case NL80211_CMD_NEW_BEACON:
1852                 /* these are required for NEW_BEACON */
1853                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1854                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1855                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1856                         return -EINVAL;
1857
1858                 call = rdev->ops->add_beacon;
1859                 break;
1860         case NL80211_CMD_SET_BEACON:
1861                 call = rdev->ops->set_beacon;
1862                 break;
1863         default:
1864                 WARN_ON(1);
1865                 return -EOPNOTSUPP;
1866         }
1867
1868         if (!call)
1869                 return -EOPNOTSUPP;
1870
1871         memset(&params, 0, sizeof(params));
1872
1873         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1874                 params.interval =
1875                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1876                 haveinfo = 1;
1877         }
1878
1879         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1880                 params.dtim_period =
1881                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1882                 haveinfo = 1;
1883         }
1884
1885         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1886                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1887                 params.head_len =
1888                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1889                 haveinfo = 1;
1890         }
1891
1892         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1893                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1894                 params.tail_len =
1895                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1896                 haveinfo = 1;
1897         }
1898
1899         if (!haveinfo)
1900                 return -EINVAL;
1901
1902         return call(&rdev->wiphy, dev, &params);
1903 }
1904
1905 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1906 {
1907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1908         struct net_device *dev = info->user_ptr[1];
1909
1910         if (!rdev->ops->del_beacon)
1911                 return -EOPNOTSUPP;
1912
1913         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1914             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1915                 return -EOPNOTSUPP;
1916
1917         return rdev->ops->del_beacon(&rdev->wiphy, dev);
1918 }
1919
1920 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1921         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1922         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1923         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1924         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1925 };
1926
1927 static int parse_station_flags(struct genl_info *info,
1928                                struct station_parameters *params)
1929 {
1930         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1931         struct nlattr *nla;
1932         int flag;
1933
1934         /*
1935          * Try parsing the new attribute first so userspace
1936          * can specify both for older kernels.
1937          */
1938         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1939         if (nla) {
1940                 struct nl80211_sta_flag_update *sta_flags;
1941
1942                 sta_flags = nla_data(nla);
1943                 params->sta_flags_mask = sta_flags->mask;
1944                 params->sta_flags_set = sta_flags->set;
1945                 if ((params->sta_flags_mask |
1946                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1947                         return -EINVAL;
1948                 return 0;
1949         }
1950
1951         /* if present, parse the old attribute */
1952
1953         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1954         if (!nla)
1955                 return 0;
1956
1957         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1958                              nla, sta_flags_policy))
1959                 return -EINVAL;
1960
1961         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1962         params->sta_flags_mask &= ~1;
1963
1964         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1965                 if (flags[flag])
1966                         params->sta_flags_set |= (1<<flag);
1967
1968         return 0;
1969 }
1970
1971 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1972                                 int flags, struct net_device *dev,
1973                                 const u8 *mac_addr, struct station_info *sinfo)
1974 {
1975         void *hdr;
1976         struct nlattr *sinfoattr, *txrate;
1977         u16 bitrate;
1978
1979         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1980         if (!hdr)
1981                 return -1;
1982
1983         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1984         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1985
1986         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1987
1988         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1989         if (!sinfoattr)
1990                 goto nla_put_failure;
1991         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1992                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1993                             sinfo->inactive_time);
1994         if (sinfo->filled & STATION_INFO_RX_BYTES)
1995                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1996                             sinfo->rx_bytes);
1997         if (sinfo->filled & STATION_INFO_TX_BYTES)
1998                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1999                             sinfo->tx_bytes);
2000         if (sinfo->filled & STATION_INFO_LLID)
2001                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2002                             sinfo->llid);
2003         if (sinfo->filled & STATION_INFO_PLID)
2004                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2005                             sinfo->plid);
2006         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2007                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2008                             sinfo->plink_state);
2009         if (sinfo->filled & STATION_INFO_SIGNAL)
2010                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2011                            sinfo->signal);
2012         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2013                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2014                            sinfo->signal_avg);
2015         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2016                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
2017                 if (!txrate)
2018                         goto nla_put_failure;
2019
2020                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2021                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
2022                 if (bitrate > 0)
2023                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2024
2025                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
2026                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
2027                                     sinfo->txrate.mcs);
2028                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2029                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2030                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
2031                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2032
2033                 nla_nest_end(msg, txrate);
2034         }
2035         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2036                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2037                             sinfo->rx_packets);
2038         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2039                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2040                             sinfo->tx_packets);
2041         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2042                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2043                             sinfo->tx_retries);
2044         if (sinfo->filled & STATION_INFO_TX_FAILED)
2045                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2046                             sinfo->tx_failed);
2047         nla_nest_end(msg, sinfoattr);
2048
2049         return genlmsg_end(msg, hdr);
2050
2051  nla_put_failure:
2052         genlmsg_cancel(msg, hdr);
2053         return -EMSGSIZE;
2054 }
2055
2056 static int nl80211_dump_station(struct sk_buff *skb,
2057                                 struct netlink_callback *cb)
2058 {
2059         struct station_info sinfo;
2060         struct cfg80211_registered_device *dev;
2061         struct net_device *netdev;
2062         u8 mac_addr[ETH_ALEN];
2063         int sta_idx = cb->args[1];
2064         int err;
2065
2066         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2067         if (err)
2068                 return err;
2069
2070         if (!dev->ops->dump_station) {
2071                 err = -EOPNOTSUPP;
2072                 goto out_err;
2073         }
2074
2075         while (1) {
2076                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2077                                              mac_addr, &sinfo);
2078                 if (err == -ENOENT)
2079                         break;
2080                 if (err)
2081                         goto out_err;
2082
2083                 if (nl80211_send_station(skb,
2084                                 NETLINK_CB(cb->skb).pid,
2085                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2086                                 netdev, mac_addr,
2087                                 &sinfo) < 0)
2088                         goto out;
2089
2090                 sta_idx++;
2091         }
2092
2093
2094  out:
2095         cb->args[1] = sta_idx;
2096         err = skb->len;
2097  out_err:
2098         nl80211_finish_netdev_dump(dev);
2099
2100         return err;
2101 }
2102
2103 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2104 {
2105         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2106         struct net_device *dev = info->user_ptr[1];
2107         struct station_info sinfo;
2108         struct sk_buff *msg;
2109         u8 *mac_addr = NULL;
2110         int err;
2111
2112         memset(&sinfo, 0, sizeof(sinfo));
2113
2114         if (!info->attrs[NL80211_ATTR_MAC])
2115                 return -EINVAL;
2116
2117         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2118
2119         if (!rdev->ops->get_station)
2120                 return -EOPNOTSUPP;
2121
2122         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2123         if (err)
2124                 return err;
2125
2126         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2127         if (!msg)
2128                 return -ENOMEM;
2129
2130         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2131                                  dev, mac_addr, &sinfo) < 0) {
2132                 nlmsg_free(msg);
2133                 return -ENOBUFS;
2134         }
2135
2136         return genlmsg_reply(msg, info);
2137 }
2138
2139 /*
2140  * Get vlan interface making sure it is running and on the right wiphy.
2141  */
2142 static int get_vlan(struct genl_info *info,
2143                     struct cfg80211_registered_device *rdev,
2144                     struct net_device **vlan)
2145 {
2146         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2147         *vlan = NULL;
2148
2149         if (vlanattr) {
2150                 *vlan = dev_get_by_index(genl_info_net(info),
2151                                          nla_get_u32(vlanattr));
2152                 if (!*vlan)
2153                         return -ENODEV;
2154                 if (!(*vlan)->ieee80211_ptr)
2155                         return -EINVAL;
2156                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2157                         return -EINVAL;
2158                 if (!netif_running(*vlan))
2159                         return -ENETDOWN;
2160         }
2161         return 0;
2162 }
2163
2164 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2165 {
2166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2167         int err;
2168         struct net_device *dev = info->user_ptr[1];
2169         struct station_parameters params;
2170         u8 *mac_addr = NULL;
2171
2172         memset(&params, 0, sizeof(params));
2173
2174         params.listen_interval = -1;
2175
2176         if (info->attrs[NL80211_ATTR_STA_AID])
2177                 return -EINVAL;
2178
2179         if (!info->attrs[NL80211_ATTR_MAC])
2180                 return -EINVAL;
2181
2182         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2183
2184         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2185                 params.supported_rates =
2186                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2187                 params.supported_rates_len =
2188                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2189         }
2190
2191         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2192                 params.listen_interval =
2193                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2194
2195         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2196                 params.ht_capa =
2197                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2198
2199         if (parse_station_flags(info, &params))
2200                 return -EINVAL;
2201
2202         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2203                 params.plink_action =
2204                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2205
2206         err = get_vlan(info, rdev, &params.vlan);
2207         if (err)
2208                 goto out;
2209
2210         /* validate settings */
2211         err = 0;
2212
2213         switch (dev->ieee80211_ptr->iftype) {
2214         case NL80211_IFTYPE_AP:
2215         case NL80211_IFTYPE_AP_VLAN:
2216         case NL80211_IFTYPE_P2P_GO:
2217                 /* disallow mesh-specific things */
2218                 if (params.plink_action)
2219                         err = -EINVAL;
2220                 break;
2221         case NL80211_IFTYPE_P2P_CLIENT:
2222         case NL80211_IFTYPE_STATION:
2223                 /* disallow everything but AUTHORIZED flag */
2224                 if (params.plink_action)
2225                         err = -EINVAL;
2226                 if (params.vlan)
2227                         err = -EINVAL;
2228                 if (params.supported_rates)
2229                         err = -EINVAL;
2230                 if (params.ht_capa)
2231                         err = -EINVAL;
2232                 if (params.listen_interval >= 0)
2233                         err = -EINVAL;
2234                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2235                         err = -EINVAL;
2236                 break;
2237         case NL80211_IFTYPE_MESH_POINT:
2238                 /* disallow things mesh doesn't support */
2239                 if (params.vlan)
2240                         err = -EINVAL;
2241                 if (params.ht_capa)
2242                         err = -EINVAL;
2243                 if (params.listen_interval >= 0)
2244                         err = -EINVAL;
2245                 if (params.supported_rates)
2246                         err = -EINVAL;
2247                 if (params.sta_flags_mask)
2248                         err = -EINVAL;
2249                 break;
2250         default:
2251                 err = -EINVAL;
2252         }
2253
2254         if (err)
2255                 goto out;
2256
2257         if (!rdev->ops->change_station) {
2258                 err = -EOPNOTSUPP;
2259                 goto out;
2260         }
2261
2262         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2263
2264  out:
2265         if (params.vlan)
2266                 dev_put(params.vlan);
2267
2268         return err;
2269 }
2270
2271 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2272 {
2273         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2274         int err;
2275         struct net_device *dev = info->user_ptr[1];
2276         struct station_parameters params;
2277         u8 *mac_addr = NULL;
2278
2279         memset(&params, 0, sizeof(params));
2280
2281         if (!info->attrs[NL80211_ATTR_MAC])
2282                 return -EINVAL;
2283
2284         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2285                 return -EINVAL;
2286
2287         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2288                 return -EINVAL;
2289
2290         if (!info->attrs[NL80211_ATTR_STA_AID])
2291                 return -EINVAL;
2292
2293         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2294         params.supported_rates =
2295                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2296         params.supported_rates_len =
2297                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2298         params.listen_interval =
2299                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2300
2301         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2302         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2303                 return -EINVAL;
2304
2305         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2306                 params.ht_capa =
2307                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2308
2309         if (parse_station_flags(info, &params))
2310                 return -EINVAL;
2311
2312         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2313             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2314             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2315                 return -EINVAL;
2316
2317         err = get_vlan(info, rdev, &params.vlan);
2318         if (err)
2319                 goto out;
2320
2321         /* validate settings */
2322         err = 0;
2323
2324         if (!rdev->ops->add_station) {
2325                 err = -EOPNOTSUPP;
2326                 goto out;
2327         }
2328
2329         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2330
2331  out:
2332         if (params.vlan)
2333                 dev_put(params.vlan);
2334         return err;
2335 }
2336
2337 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2338 {
2339         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2340         struct net_device *dev = info->user_ptr[1];
2341         u8 *mac_addr = NULL;
2342
2343         if (info->attrs[NL80211_ATTR_MAC])
2344                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2345
2346         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2347             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2348             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2349             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2350                 return -EINVAL;
2351
2352         if (!rdev->ops->del_station)
2353                 return -EOPNOTSUPP;
2354
2355         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2356 }
2357
2358 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2359                                 int flags, struct net_device *dev,
2360                                 u8 *dst, u8 *next_hop,
2361                                 struct mpath_info *pinfo)
2362 {
2363         void *hdr;
2364         struct nlattr *pinfoattr;
2365
2366         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2367         if (!hdr)
2368                 return -1;
2369
2370         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2371         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2372         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2373
2374         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2375
2376         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2377         if (!pinfoattr)
2378                 goto nla_put_failure;
2379         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2380                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2381                             pinfo->frame_qlen);
2382         if (pinfo->filled & MPATH_INFO_SN)
2383                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2384                             pinfo->sn);
2385         if (pinfo->filled & MPATH_INFO_METRIC)
2386                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2387                             pinfo->metric);
2388         if (pinfo->filled & MPATH_INFO_EXPTIME)
2389                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2390                             pinfo->exptime);
2391         if (pinfo->filled & MPATH_INFO_FLAGS)
2392                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2393                             pinfo->flags);
2394         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2395                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2396                             pinfo->discovery_timeout);
2397         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2398                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2399                             pinfo->discovery_retries);
2400
2401         nla_nest_end(msg, pinfoattr);
2402
2403         return genlmsg_end(msg, hdr);
2404
2405  nla_put_failure:
2406         genlmsg_cancel(msg, hdr);
2407         return -EMSGSIZE;
2408 }
2409
2410 static int nl80211_dump_mpath(struct sk_buff *skb,
2411                               struct netlink_callback *cb)
2412 {
2413         struct mpath_info pinfo;
2414         struct cfg80211_registered_device *dev;
2415         struct net_device *netdev;
2416         u8 dst[ETH_ALEN];
2417         u8 next_hop[ETH_ALEN];
2418         int path_idx = cb->args[1];
2419         int err;
2420
2421         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2422         if (err)
2423                 return err;
2424
2425         if (!dev->ops->dump_mpath) {
2426                 err = -EOPNOTSUPP;
2427                 goto out_err;
2428         }
2429
2430         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2431                 err = -EOPNOTSUPP;
2432                 goto out_err;
2433         }
2434
2435         while (1) {
2436                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2437                                            dst, next_hop, &pinfo);
2438                 if (err == -ENOENT)
2439                         break;
2440                 if (err)
2441                         goto out_err;
2442
2443                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2444                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2445                                        netdev, dst, next_hop,
2446                                        &pinfo) < 0)
2447                         goto out;
2448
2449                 path_idx++;
2450         }
2451
2452
2453  out:
2454         cb->args[1] = path_idx;
2455         err = skb->len;
2456  out_err:
2457         nl80211_finish_netdev_dump(dev);
2458         return err;
2459 }
2460
2461 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2462 {
2463         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2464         int err;
2465         struct net_device *dev = info->user_ptr[1];
2466         struct mpath_info pinfo;
2467         struct sk_buff *msg;
2468         u8 *dst = NULL;
2469         u8 next_hop[ETH_ALEN];
2470
2471         memset(&pinfo, 0, sizeof(pinfo));
2472
2473         if (!info->attrs[NL80211_ATTR_MAC])
2474                 return -EINVAL;
2475
2476         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2477
2478         if (!rdev->ops->get_mpath)
2479                 return -EOPNOTSUPP;
2480
2481         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2482                 return -EOPNOTSUPP;
2483
2484         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2485         if (err)
2486                 return err;
2487
2488         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2489         if (!msg)
2490                 return -ENOMEM;
2491
2492         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2493                                  dev, dst, next_hop, &pinfo) < 0) {
2494                 nlmsg_free(msg);
2495                 return -ENOBUFS;
2496         }
2497
2498         return genlmsg_reply(msg, info);
2499 }
2500
2501 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2502 {
2503         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2504         struct net_device *dev = info->user_ptr[1];
2505         u8 *dst = NULL;
2506         u8 *next_hop = NULL;
2507
2508         if (!info->attrs[NL80211_ATTR_MAC])
2509                 return -EINVAL;
2510
2511         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2512                 return -EINVAL;
2513
2514         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2515         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2516
2517         if (!rdev->ops->change_mpath)
2518                 return -EOPNOTSUPP;
2519
2520         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2521                 return -EOPNOTSUPP;
2522
2523         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2524 }
2525
2526 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2527 {
2528         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2529         struct net_device *dev = info->user_ptr[1];
2530         u8 *dst = NULL;
2531         u8 *next_hop = NULL;
2532
2533         if (!info->attrs[NL80211_ATTR_MAC])
2534                 return -EINVAL;
2535
2536         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2537                 return -EINVAL;
2538
2539         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2540         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2541
2542         if (!rdev->ops->add_mpath)
2543                 return -EOPNOTSUPP;
2544
2545         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2546                 return -EOPNOTSUPP;
2547
2548         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2549 }
2550
2551 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2552 {
2553         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2554         struct net_device *dev = info->user_ptr[1];
2555         u8 *dst = NULL;
2556
2557         if (info->attrs[NL80211_ATTR_MAC])
2558                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2559
2560         if (!rdev->ops->del_mpath)
2561                 return -EOPNOTSUPP;
2562
2563         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2564 }
2565
2566 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2567 {
2568         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2569         struct net_device *dev = info->user_ptr[1];
2570         struct bss_parameters params;
2571
2572         memset(&params, 0, sizeof(params));
2573         /* default to not changing parameters */
2574         params.use_cts_prot = -1;
2575         params.use_short_preamble = -1;
2576         params.use_short_slot_time = -1;
2577         params.ap_isolate = -1;
2578         params.ht_opmode = -1;
2579
2580         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2581                 params.use_cts_prot =
2582                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2583         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2584                 params.use_short_preamble =
2585                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2586         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2587                 params.use_short_slot_time =
2588                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2589         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2590                 params.basic_rates =
2591                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2592                 params.basic_rates_len =
2593                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2594         }
2595         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2596                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2597         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2598                 params.ht_opmode =
2599                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2600
2601         if (!rdev->ops->change_bss)
2602                 return -EOPNOTSUPP;
2603
2604         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2605             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2606                 return -EOPNOTSUPP;
2607
2608         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2609 }
2610
2611 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2612         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2613         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2614         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2615         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2616         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2617         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2618 };
2619
2620 static int parse_reg_rule(struct nlattr *tb[],
2621         struct ieee80211_reg_rule *reg_rule)
2622 {
2623         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2624         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2625
2626         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2627                 return -EINVAL;
2628         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2629                 return -EINVAL;
2630         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2631                 return -EINVAL;
2632         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2633                 return -EINVAL;
2634         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2635                 return -EINVAL;
2636
2637         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2638
2639         freq_range->start_freq_khz =
2640                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2641         freq_range->end_freq_khz =
2642                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2643         freq_range->max_bandwidth_khz =
2644                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2645
2646         power_rule->max_eirp =
2647                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2648
2649         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2650                 power_rule->max_antenna_gain =
2651                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2652
2653         return 0;
2654 }
2655
2656 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2657 {
2658         int r;
2659         char *data = NULL;
2660
2661         /*
2662          * You should only get this when cfg80211 hasn't yet initialized
2663          * completely when built-in to the kernel right between the time
2664          * window between nl80211_init() and regulatory_init(), if that is
2665          * even possible.
2666          */
2667         mutex_lock(&cfg80211_mutex);
2668         if (unlikely(!cfg80211_regdomain)) {
2669                 mutex_unlock(&cfg80211_mutex);
2670                 return -EINPROGRESS;
2671         }
2672         mutex_unlock(&cfg80211_mutex);
2673
2674         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2675                 return -EINVAL;
2676
2677         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2678
2679         r = regulatory_hint_user(data);
2680
2681         return r;
2682 }
2683
2684 static int nl80211_get_mesh_config(struct sk_buff *skb,
2685                                    struct genl_info *info)
2686 {
2687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2688         struct net_device *dev = info->user_ptr[1];
2689         struct wireless_dev *wdev = dev->ieee80211_ptr;
2690         struct mesh_config cur_params;
2691         int err = 0;
2692         void *hdr;
2693         struct nlattr *pinfoattr;
2694         struct sk_buff *msg;
2695
2696         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2697                 return -EOPNOTSUPP;
2698
2699         if (!rdev->ops->get_mesh_config)
2700                 return -EOPNOTSUPP;
2701
2702         wdev_lock(wdev);
2703         /* If not connected, get default parameters */
2704         if (!wdev->mesh_id_len)
2705                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2706         else
2707                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
2708                                                  &cur_params);
2709         wdev_unlock(wdev);
2710
2711         if (err)
2712                 return err;
2713
2714         /* Draw up a netlink message to send back */
2715         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2716         if (!msg)
2717                 return -ENOMEM;
2718         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2719                              NL80211_CMD_GET_MESH_CONFIG);
2720         if (!hdr)
2721                 goto nla_put_failure;
2722         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
2723         if (!pinfoattr)
2724                 goto nla_put_failure;
2725         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2726         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2727                         cur_params.dot11MeshRetryTimeout);
2728         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2729                         cur_params.dot11MeshConfirmTimeout);
2730         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2731                         cur_params.dot11MeshHoldingTimeout);
2732         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2733                         cur_params.dot11MeshMaxPeerLinks);
2734         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2735                         cur_params.dot11MeshMaxRetries);
2736         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2737                         cur_params.dot11MeshTTL);
2738         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2739                         cur_params.element_ttl);
2740         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2741                         cur_params.auto_open_plinks);
2742         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2743                         cur_params.dot11MeshHWMPmaxPREQretries);
2744         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2745                         cur_params.path_refresh_time);
2746         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2747                         cur_params.min_discovery_timeout);
2748         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2749                         cur_params.dot11MeshHWMPactivePathTimeout);
2750         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2751                         cur_params.dot11MeshHWMPpreqMinInterval);
2752         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2753                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2754         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2755                         cur_params.dot11MeshHWMPRootMode);
2756         nla_nest_end(msg, pinfoattr);
2757         genlmsg_end(msg, hdr);
2758         return genlmsg_reply(msg, info);
2759
2760  nla_put_failure:
2761         genlmsg_cancel(msg, hdr);
2762         nlmsg_free(msg);
2763         return -ENOBUFS;
2764 }
2765
2766 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2767         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2768         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2769         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2770         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2771         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2772         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2773         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2774         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2775
2776         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2777         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2778         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2779         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2780         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2781         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2782 };
2783
2784 static const struct nla_policy
2785         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
2786         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
2787         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
2788         [NL80211_MESH_SETUP_VENDOR_PATH_SEL_IE] = { .type = NLA_BINARY,
2789                 .len = IEEE80211_MAX_DATA_LEN },
2790 };
2791
2792 static int nl80211_parse_mesh_config(struct genl_info *info,
2793                                      struct mesh_config *cfg,
2794                                      u32 *mask_out)
2795 {
2796         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2797         u32 mask = 0;
2798
2799 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2800 do {\
2801         if (table[attr_num]) {\
2802                 cfg->param = nla_fn(table[attr_num]); \
2803                 mask |= (1 << (attr_num - 1)); \
2804         } \
2805 } while (0);\
2806
2807
2808         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
2809                 return -EINVAL;
2810         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2811                              info->attrs[NL80211_ATTR_MESH_CONFIG],
2812                              nl80211_meshconf_params_policy))
2813                 return -EINVAL;
2814
2815         /* This makes sure that there aren't more than 32 mesh config
2816          * parameters (otherwise our bitfield scheme would not work.) */
2817         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2818
2819         /* Fill in the params struct */
2820         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2821                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2822         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2823                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2824         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2825                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2826         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2827                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2828         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2829                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2831                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2832         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
2833                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
2834         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2835                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2836         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2837                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2838                         nla_get_u8);
2839         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2840                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2841         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2842                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2843                         nla_get_u16);
2844         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2845                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2846                         nla_get_u32);
2847         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2848                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2849                         nla_get_u16);
2850         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2851                         dot11MeshHWMPnetDiameterTraversalTime,
2852                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2853                         nla_get_u16);
2854         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2855                         dot11MeshHWMPRootMode, mask,
2856                         NL80211_MESHCONF_HWMP_ROOTMODE,
2857                         nla_get_u8);
2858         if (mask_out)
2859                 *mask_out = mask;
2860
2861         return 0;
2862
2863 #undef FILL_IN_MESH_PARAM_IF_SET
2864 }
2865
2866 static int nl80211_parse_mesh_setup(struct genl_info *info,
2867                                      struct mesh_setup *setup)
2868 {
2869         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
2870
2871         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
2872                 return -EINVAL;
2873         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
2874                              info->attrs[NL80211_ATTR_MESH_SETUP],
2875                              nl80211_mesh_setup_params_policy))
2876                 return -EINVAL;
2877
2878         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
2879                 setup->path_sel_proto =
2880                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
2881                  IEEE80211_PATH_PROTOCOL_VENDOR :
2882                  IEEE80211_PATH_PROTOCOL_HWMP;
2883
2884         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
2885                 setup->path_metric =
2886                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
2887                  IEEE80211_PATH_METRIC_VENDOR :
2888                  IEEE80211_PATH_METRIC_AIRTIME;
2889
2890         if (tb[NL80211_MESH_SETUP_VENDOR_PATH_SEL_IE]) {
2891                 struct nlattr *ieattr =
2892                         tb[NL80211_MESH_SETUP_VENDOR_PATH_SEL_IE];
2893                 if (!is_valid_ie_attr(ieattr))
2894                         return -EINVAL;
2895                 setup->vendor_ie = nla_data(ieattr);
2896                 setup->vendor_ie_len = nla_len(ieattr);
2897         }
2898
2899         return 0;
2900 }
2901
2902 static int nl80211_update_mesh_config(struct sk_buff *skb,
2903                                       struct genl_info *info)
2904 {
2905         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2906         struct net_device *dev = info->user_ptr[1];
2907         struct wireless_dev *wdev = dev->ieee80211_ptr;
2908         struct mesh_config cfg;
2909         u32 mask;
2910         int err;
2911
2912         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2913                 return -EOPNOTSUPP;
2914
2915         if (!rdev->ops->update_mesh_config)
2916                 return -EOPNOTSUPP;
2917
2918         err = nl80211_parse_mesh_config(info, &cfg, &mask);
2919         if (err)
2920                 return err;
2921
2922         wdev_lock(wdev);
2923         if (!wdev->mesh_id_len)
2924                 err = -ENOLINK;
2925
2926         if (!err)
2927                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
2928                                                     mask, &cfg);
2929
2930         wdev_unlock(wdev);
2931
2932         return err;
2933 }
2934
2935 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2936 {
2937         struct sk_buff *msg;
2938         void *hdr = NULL;
2939         struct nlattr *nl_reg_rules;
2940         unsigned int i;
2941         int err = -EINVAL;
2942
2943         mutex_lock(&cfg80211_mutex);
2944
2945         if (!cfg80211_regdomain)
2946                 goto out;
2947
2948         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2949         if (!msg) {
2950                 err = -ENOBUFS;
2951                 goto out;
2952         }
2953
2954         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2955                              NL80211_CMD_GET_REG);
2956         if (!hdr)
2957                 goto nla_put_failure;
2958
2959         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2960                 cfg80211_regdomain->alpha2);
2961
2962         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2963         if (!nl_reg_rules)
2964                 goto nla_put_failure;
2965
2966         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2967                 struct nlattr *nl_reg_rule;
2968                 const struct ieee80211_reg_rule *reg_rule;
2969                 const struct ieee80211_freq_range *freq_range;
2970                 const struct ieee80211_power_rule *power_rule;
2971
2972                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2973                 freq_range = &reg_rule->freq_range;
2974                 power_rule = &reg_rule->power_rule;
2975
2976                 nl_reg_rule = nla_nest_start(msg, i);
2977                 if (!nl_reg_rule)
2978                         goto nla_put_failure;
2979
2980                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2981                         reg_rule->flags);
2982                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2983                         freq_range->start_freq_khz);
2984                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2985                         freq_range->end_freq_khz);
2986                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2987                         freq_range->max_bandwidth_khz);
2988                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2989                         power_rule->max_antenna_gain);
2990                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2991                         power_rule->max_eirp);
2992
2993                 nla_nest_end(msg, nl_reg_rule);
2994         }
2995
2996         nla_nest_end(msg, nl_reg_rules);
2997
2998         genlmsg_end(msg, hdr);
2999         err = genlmsg_reply(msg, info);
3000         goto out;
3001
3002 nla_put_failure:
3003         genlmsg_cancel(msg, hdr);
3004         nlmsg_free(msg);
3005         err = -EMSGSIZE;
3006 out:
3007         mutex_unlock(&cfg80211_mutex);
3008         return err;
3009 }
3010
3011 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3012 {
3013         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3014         struct nlattr *nl_reg_rule;
3015         char *alpha2 = NULL;
3016         int rem_reg_rules = 0, r = 0;
3017         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3018         struct ieee80211_regdomain *rd = NULL;
3019
3020         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3021                 return -EINVAL;
3022
3023         if (!info->attrs[NL80211_ATTR_REG_RULES])
3024                 return -EINVAL;
3025
3026         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3027
3028         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3029                         rem_reg_rules) {
3030                 num_rules++;
3031                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3032                         return -EINVAL;
3033         }
3034
3035         mutex_lock(&cfg80211_mutex);
3036
3037         if (!reg_is_valid_request(alpha2)) {
3038                 r = -EINVAL;
3039                 goto bad_reg;
3040         }
3041
3042         size_of_regd = sizeof(struct ieee80211_regdomain) +
3043                 (num_rules * sizeof(struct ieee80211_reg_rule));
3044
3045         rd = kzalloc(size_of_regd, GFP_KERNEL);
3046         if (!rd) {
3047                 r = -ENOMEM;
3048                 goto bad_reg;
3049         }
3050
3051         rd->n_reg_rules = num_rules;
3052         rd->alpha2[0] = alpha2[0];
3053         rd->alpha2[1] = alpha2[1];
3054
3055         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3056                         rem_reg_rules) {
3057                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3058                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3059                         reg_rule_policy);
3060                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3061                 if (r)
3062                         goto bad_reg;
3063
3064                 rule_idx++;
3065
3066                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3067                         r = -EINVAL;
3068                         goto bad_reg;
3069                 }
3070         }
3071
3072         BUG_ON(rule_idx != num_rules);
3073
3074         r = set_regdom(rd);
3075
3076         mutex_unlock(&cfg80211_mutex);
3077
3078         return r;
3079
3080  bad_reg:
3081         mutex_unlock(&cfg80211_mutex);
3082         kfree(rd);
3083         return r;
3084 }
3085
3086 static int validate_scan_freqs(struct nlattr *freqs)
3087 {
3088         struct nlattr *attr1, *attr2;
3089         int n_channels = 0, tmp1, tmp2;
3090
3091         nla_for_each_nested(attr1, freqs, tmp1) {
3092                 n_channels++;
3093                 /*
3094                  * Some hardware has a limited channel list for
3095                  * scanning, and it is pretty much nonsensical
3096                  * to scan for a channel twice, so disallow that
3097                  * and don't require drivers to check that the
3098                  * channel list they get isn't longer than what
3099                  * they can scan, as long as they can scan all
3100                  * the channels they registered at once.
3101                  */
3102                 nla_for_each_nested(attr2, freqs, tmp2)
3103                         if (attr1 != attr2 &&
3104                             nla_get_u32(attr1) == nla_get_u32(attr2))
3105                                 return 0;
3106         }
3107
3108         return n_channels;
3109 }
3110
3111 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3112 {
3113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3114         struct net_device *dev = info->user_ptr[1];
3115         struct cfg80211_scan_request *request;
3116         struct cfg80211_ssid *ssid;
3117         struct ieee80211_channel *channel;
3118         struct nlattr *attr;
3119         struct wiphy *wiphy;
3120         int err, tmp, n_ssids = 0, n_channels, i;
3121         enum ieee80211_band band;
3122         size_t ie_len;
3123
3124         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3125                 return -EINVAL;
3126
3127         wiphy = &rdev->wiphy;
3128
3129         if (!rdev->ops->scan)
3130                 return -EOPNOTSUPP;
3131
3132         if (rdev->scan_req)
3133                 return -EBUSY;
3134
3135         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3136                 n_channels = validate_scan_freqs(
3137                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3138                 if (!n_channels)
3139                         return -EINVAL;
3140         } else {
3141                 n_channels = 0;
3142
3143                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3144                         if (wiphy->bands[band])
3145                                 n_channels += wiphy->bands[band]->n_channels;
3146         }
3147
3148         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3149                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3150                         n_ssids++;
3151
3152         if (n_ssids > wiphy->max_scan_ssids)
3153                 return -EINVAL;
3154
3155         if (info->attrs[NL80211_ATTR_IE])
3156                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3157         else
3158                 ie_len = 0;
3159
3160         if (ie_len > wiphy->max_scan_ie_len)
3161                 return -EINVAL;
3162
3163         request = kzalloc(sizeof(*request)
3164                         + sizeof(*ssid) * n_ssids
3165                         + sizeof(channel) * n_channels
3166                         + ie_len, GFP_KERNEL);
3167         if (!request)
3168                 return -ENOMEM;
3169
3170         if (n_ssids)
3171                 request->ssids = (void *)&request->channels[n_channels];
3172         request->n_ssids = n_ssids;
3173         if (ie_len) {
3174                 if (request->ssids)
3175                         request->ie = (void *)(request->ssids + n_ssids);
3176                 else
3177                         request->ie = (void *)(request->channels + n_channels);
3178         }
3179
3180         i = 0;
3181         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3182                 /* user specified, bail out if channel not found */
3183                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3184                         struct ieee80211_channel *chan;
3185
3186                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3187
3188                         if (!chan) {
3189                                 err = -EINVAL;
3190                                 goto out_free;
3191                         }
3192
3193                         /* ignore disabled channels */
3194                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3195                                 continue;
3196
3197                         request->channels[i] = chan;
3198                         i++;
3199                 }
3200         } else {
3201                 /* all channels */
3202                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3203                         int j;
3204                         if (!wiphy->bands[band])
3205                                 continue;
3206                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3207                                 struct ieee80211_channel *chan;
3208
3209                                 chan = &wiphy->bands[band]->channels[j];
3210
3211                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3212                                         continue;
3213
3214                                 request->channels[i] = chan;
3215                                 i++;
3216                         }
3217                 }
3218         }
3219
3220         if (!i) {
3221                 err = -EINVAL;
3222                 goto out_free;
3223         }
3224
3225         request->n_channels = i;
3226
3227         i = 0;
3228         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3229                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3230                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3231                                 err = -EINVAL;
3232                                 goto out_free;
3233                         }
3234                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3235                         request->ssids[i].ssid_len = nla_len(attr);
3236                         i++;
3237                 }
3238         }
3239
3240         if (info->attrs[NL80211_ATTR_IE]) {
3241                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3242                 memcpy((void *)request->ie,
3243                        nla_data(info->attrs[NL80211_ATTR_IE]),
3244                        request->ie_len);
3245         }
3246
3247         request->dev = dev;
3248         request->wiphy = &rdev->wiphy;
3249
3250         rdev->scan_req = request;
3251         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3252
3253         if (!err) {
3254                 nl80211_send_scan_start(rdev, dev);
3255                 dev_hold(dev);
3256         } else {
3257  out_free:
3258                 rdev->scan_req = NULL;
3259                 kfree(request);
3260         }
3261
3262         return err;
3263 }
3264
3265 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3266                             struct cfg80211_registered_device *rdev,
3267                             struct wireless_dev *wdev,
3268                             struct cfg80211_internal_bss *intbss)
3269 {
3270         struct cfg80211_bss *res = &intbss->pub;
3271         void *hdr;
3272         struct nlattr *bss;
3273         int i;
3274
3275         ASSERT_WDEV_LOCK(wdev);
3276
3277         hdr = nl80211hdr_put(msg, pid, seq, flags,
3278                              NL80211_CMD_NEW_SCAN_RESULTS);
3279         if (!hdr)
3280                 return -1;
3281
3282         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3283         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3284
3285         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3286         if (!bss)
3287                 goto nla_put_failure;
3288         if (!is_zero_ether_addr(res->bssid))
3289                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3290         if (res->information_elements && res->len_information_elements)
3291                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3292                         res->len_information_elements,
3293                         res->information_elements);
3294         if (res->beacon_ies && res->len_beacon_ies &&
3295             res->beacon_ies != res->information_elements)
3296                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3297                         res->len_beacon_ies, res->beacon_ies);
3298         if (res->tsf)
3299                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3300         if (res->beacon_interval)
3301                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3302         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3303         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3304         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3305                 jiffies_to_msecs(jiffies - intbss->ts));
3306
3307         switch (rdev->wiphy.signal_type) {
3308         case CFG80211_SIGNAL_TYPE_MBM:
3309                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3310                 break;
3311         case CFG80211_SIGNAL_TYPE_UNSPEC:
3312                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3313                 break;
3314         default:
3315                 break;
3316         }
3317
3318         switch (wdev->iftype) {
3319         case NL80211_IFTYPE_P2P_CLIENT:
3320         case NL80211_IFTYPE_STATION:
3321                 if (intbss == wdev->current_bss)
3322                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3323                                     NL80211_BSS_STATUS_ASSOCIATED);
3324                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3325                         if (intbss != wdev->auth_bsses[i])
3326                                 continue;
3327                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3328                                     NL80211_BSS_STATUS_AUTHENTICATED);
3329                         break;
3330                 }
3331                 break;
3332         case NL80211_IFTYPE_ADHOC:
3333                 if (intbss == wdev->current_bss)
3334                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3335                                     NL80211_BSS_STATUS_IBSS_JOINED);
3336                 break;
3337         default:
3338                 break;
3339         }
3340
3341         nla_nest_end(msg, bss);
3342
3343         return genlmsg_end(msg, hdr);
3344
3345  nla_put_failure:
3346         genlmsg_cancel(msg, hdr);
3347         return -EMSGSIZE;
3348 }
3349
3350 static int nl80211_dump_scan(struct sk_buff *skb,
3351                              struct netlink_callback *cb)
3352 {
3353         struct cfg80211_registered_device *rdev;
3354         struct net_device *dev;
3355         struct cfg80211_internal_bss *scan;
3356         struct wireless_dev *wdev;
3357         int start = cb->args[1], idx = 0;
3358         int err;
3359
3360         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3361         if (err)
3362                 return err;
3363
3364         wdev = dev->ieee80211_ptr;
3365
3366         wdev_lock(wdev);
3367         spin_lock_bh(&rdev->bss_lock);
3368         cfg80211_bss_expire(rdev);
3369
3370         list_for_each_entry(scan, &rdev->bss_list, list) {
3371                 if (++idx <= start)
3372                         continue;
3373                 if (nl80211_send_bss(skb,
3374                                 NETLINK_CB(cb->skb).pid,
3375                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3376                                 rdev, wdev, scan) < 0) {
3377                         idx--;
3378                         break;
3379                 }
3380         }
3381
3382         spin_unlock_bh(&rdev->bss_lock);
3383         wdev_unlock(wdev);
3384
3385         cb->args[1] = idx;
3386         nl80211_finish_netdev_dump(rdev);
3387
3388         return skb->len;
3389 }
3390
3391 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3392                                 int flags, struct net_device *dev,
3393                                 struct survey_info *survey)
3394 {
3395         void *hdr;
3396         struct nlattr *infoattr;
3397
3398         /* Survey without a channel doesn't make sense */
3399         if (!survey->channel)
3400                 return -EINVAL;
3401
3402         hdr = nl80211hdr_put(msg, pid, seq, flags,
3403                              NL80211_CMD_NEW_SURVEY_RESULTS);
3404         if (!hdr)
3405                 return -ENOMEM;
3406
3407         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3408
3409         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3410         if (!infoattr)
3411                 goto nla_put_failure;
3412
3413         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3414                     survey->channel->center_freq);
3415         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3416                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3417                             survey->noise);
3418         if (survey->filled & SURVEY_INFO_IN_USE)
3419                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3420         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3421                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3422                             survey->channel_time);
3423         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3424                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3425                             survey->channel_time_busy);
3426         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3427                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3428                             survey->channel_time_ext_busy);
3429         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3430                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3431                             survey->channel_time_rx);
3432         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3433                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3434                             survey->channel_time_tx);
3435
3436         nla_nest_end(msg, infoattr);
3437
3438         return genlmsg_end(msg, hdr);
3439
3440  nla_put_failure:
3441         genlmsg_cancel(msg, hdr);
3442         return -EMSGSIZE;
3443 }
3444
3445 static int nl80211_dump_survey(struct sk_buff *skb,
3446                         struct netlink_callback *cb)
3447 {
3448         struct survey_info survey;
3449         struct cfg80211_registered_device *dev;
3450         struct net_device *netdev;
3451         int survey_idx = cb->args[1];
3452         int res;
3453
3454         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3455         if (res)
3456                 return res;
3457
3458         if (!dev->ops->dump_survey) {
3459                 res = -EOPNOTSUPP;
3460                 goto out_err;
3461         }
3462
3463         while (1) {
3464                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3465                                             &survey);
3466                 if (res == -ENOENT)
3467                         break;
3468                 if (res)
3469                         goto out_err;
3470
3471                 if (nl80211_send_survey(skb,
3472                                 NETLINK_CB(cb->skb).pid,
3473                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3474                                 netdev,
3475                                 &survey) < 0)
3476                         goto out;
3477                 survey_idx++;
3478         }
3479
3480  out:
3481         cb->args[1] = survey_idx;
3482         res = skb->len;
3483  out_err:
3484         nl80211_finish_netdev_dump(dev);
3485         return res;
3486 }
3487
3488 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3489 {
3490         return auth_type <= NL80211_AUTHTYPE_MAX;
3491 }
3492
3493 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3494 {
3495         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3496                                   NL80211_WPA_VERSION_2));
3497 }
3498
3499 static bool nl80211_valid_akm_suite(u32 akm)
3500 {
3501         return akm == WLAN_AKM_SUITE_8021X ||
3502                 akm == WLAN_AKM_SUITE_PSK;
3503 }
3504
3505 static bool nl80211_valid_cipher_suite(u32 cipher)
3506 {
3507         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3508                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3509                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3510                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3511                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3512 }
3513
3514
3515 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3516 {
3517         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3518         struct net_device *dev = info->user_ptr[1];
3519         struct ieee80211_channel *chan;
3520         const u8 *bssid, *ssid, *ie = NULL;
3521         int err, ssid_len, ie_len = 0;
3522         enum nl80211_auth_type auth_type;
3523         struct key_parse key;
3524         bool local_state_change;
3525
3526         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3527                 return -EINVAL;
3528
3529         if (!info->attrs[NL80211_ATTR_MAC])
3530                 return -EINVAL;
3531
3532         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3533                 return -EINVAL;
3534
3535         if (!info->attrs[NL80211_ATTR_SSID])
3536                 return -EINVAL;
3537
3538         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3539                 return -EINVAL;
3540
3541         err = nl80211_parse_key(info, &key);
3542         if (err)
3543                 return err;
3544
3545         if (key.idx >= 0) {
3546                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3547                         return -EINVAL;
3548                 if (!key.p.key || !key.p.key_len)
3549                         return -EINVAL;
3550                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3551                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3552                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3553                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3554                         return -EINVAL;
3555                 if (key.idx > 4)
3556                         return -EINVAL;
3557         } else {
3558                 key.p.key_len = 0;
3559                 key.p.key = NULL;
3560         }
3561
3562         if (key.idx >= 0) {
3563                 int i;
3564                 bool ok = false;
3565                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3566                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3567                                 ok = true;
3568                                 break;
3569                         }
3570                 }
3571                 if (!ok)
3572                         return -EINVAL;
3573         }
3574
3575         if (!rdev->ops->auth)
3576                 return -EOPNOTSUPP;
3577
3578         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3579             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3580                 return -EOPNOTSUPP;
3581
3582         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3583         chan = ieee80211_get_channel(&rdev->wiphy,
3584                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3585         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3586                 return -EINVAL;
3587
3588         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3589         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3590
3591         if (info->attrs[NL80211_ATTR_IE]) {
3592                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3593                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3594         }
3595
3596         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3597         if (!nl80211_valid_auth_type(auth_type))
3598                 return -EINVAL;
3599
3600         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3601
3602         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3603                                   ssid, ssid_len, ie, ie_len,
3604                                   key.p.key, key.p.key_len, key.idx,
3605                                   local_state_change);
3606 }
3607
3608 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3609                                    struct genl_info *info,
3610                                    struct cfg80211_crypto_settings *settings,
3611                                    int cipher_limit)
3612 {
3613         memset(settings, 0, sizeof(*settings));
3614
3615         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3616
3617         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3618                 u16 proto;
3619                 proto = nla_get_u16(
3620                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3621                 settings->control_port_ethertype = cpu_to_be16(proto);
3622                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3623                     proto != ETH_P_PAE)
3624                         return -EINVAL;
3625                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3626                         settings->control_port_no_encrypt = true;
3627         } else
3628                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3629
3630         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3631                 void *data;
3632                 int len, i;
3633
3634                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3635                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3636                 settings->n_ciphers_pairwise = len / sizeof(u32);
3637
3638                 if (len % sizeof(u32))
3639                         return -EINVAL;
3640
3641                 if (settings->n_ciphers_pairwise > cipher_limit)
3642                         return -EINVAL;
3643
3644                 memcpy(settings->ciphers_pairwise, data, len);
3645
3646                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3647                         if (!nl80211_valid_cipher_suite(
3648                                         settings->ciphers_pairwise[i]))
3649                                 return -EINVAL;
3650         }
3651
3652         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3653                 settings->cipher_group =
3654                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3655                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3656                         return -EINVAL;
3657         }
3658
3659         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3660                 settings->wpa_versions =
3661                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3662                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3663                         return -EINVAL;
3664         }
3665
3666         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3667                 void *data;
3668                 int len, i;
3669
3670                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3671                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3672                 settings->n_akm_suites = len / sizeof(u32);
3673
3674                 if (len % sizeof(u32))
3675                         return -EINVAL;
3676
3677                 memcpy(settings->akm_suites, data, len);
3678
3679                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3680                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3681                                 return -EINVAL;
3682         }
3683
3684         return 0;
3685 }
3686
3687 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3688 {
3689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3690         struct net_device *dev = info->user_ptr[1];
3691         struct cfg80211_crypto_settings crypto;
3692         struct ieee80211_channel *chan;
3693         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3694         int err, ssid_len, ie_len = 0;
3695         bool use_mfp = false;
3696
3697         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3698                 return -EINVAL;
3699
3700         if (!info->attrs[NL80211_ATTR_MAC] ||
3701             !info->attrs[NL80211_ATTR_SSID] ||
3702             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3703                 return -EINVAL;
3704
3705         if (!rdev->ops->assoc)
3706                 return -EOPNOTSUPP;
3707
3708         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3709             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3710                 return -EOPNOTSUPP;
3711
3712         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3713
3714         chan = ieee80211_get_channel(&rdev->wiphy,
3715                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3716         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3717                 return -EINVAL;
3718
3719         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3720         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3721
3722         if (info->attrs[NL80211_ATTR_IE]) {
3723                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3724                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3725         }
3726
3727         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3728                 enum nl80211_mfp mfp =
3729                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3730                 if (mfp == NL80211_MFP_REQUIRED)
3731                         use_mfp = true;
3732                 else if (mfp != NL80211_MFP_NO)
3733                         return -EINVAL;
3734         }
3735
3736         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3737                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3738
3739         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3740         if (!err)
3741                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3742                                           ssid, ssid_len, ie, ie_len, use_mfp,
3743                                           &crypto);
3744
3745         return err;
3746 }
3747
3748 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3749 {
3750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3751         struct net_device *dev = info->user_ptr[1];
3752         const u8 *ie = NULL, *bssid;
3753         int ie_len = 0;
3754         u16 reason_code;
3755         bool local_state_change;
3756
3757         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3758                 return -EINVAL;
3759
3760         if (!info->attrs[NL80211_ATTR_MAC])
3761                 return -EINVAL;
3762
3763         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3764                 return -EINVAL;
3765
3766         if (!rdev->ops->deauth)
3767                 return -EOPNOTSUPP;
3768
3769         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3770             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3771                 return -EOPNOTSUPP;
3772
3773         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3774
3775         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3776         if (reason_code == 0) {
3777                 /* Reason Code 0 is reserved */
3778                 return -EINVAL;
3779         }
3780
3781         if (info->attrs[NL80211_ATTR_IE]) {
3782                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3783                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3784         }
3785
3786         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3787
3788         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3789                                     local_state_change);
3790 }
3791
3792 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3793 {
3794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3795         struct net_device *dev = info->user_ptr[1];
3796         const u8 *ie = NULL, *bssid;
3797         int ie_len = 0;
3798         u16 reason_code;
3799         bool local_state_change;
3800
3801         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3802                 return -EINVAL;
3803
3804         if (!info->attrs[NL80211_ATTR_MAC])
3805                 return -EINVAL;
3806
3807         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3808                 return -EINVAL;
3809
3810         if (!rdev->ops->disassoc)
3811                 return -EOPNOTSUPP;
3812
3813         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3814             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3815                 return -EOPNOTSUPP;
3816
3817         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3818
3819         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3820         if (reason_code == 0) {
3821                 /* Reason Code 0 is reserved */
3822                 return -EINVAL;
3823         }
3824
3825         if (info->attrs[NL80211_ATTR_IE]) {
3826                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3827                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3828         }
3829
3830         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3831
3832         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3833                                       local_state_change);
3834 }
3835
3836 static bool
3837 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
3838                          int mcast_rate[IEEE80211_NUM_BANDS],
3839                          int rateval)
3840 {
3841         struct wiphy *wiphy = &rdev->wiphy;
3842         bool found = false;
3843         int band, i;
3844
3845         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3846                 struct ieee80211_supported_band *sband;
3847
3848                 sband = wiphy->bands[band];
3849                 if (!sband)
3850                         continue;
3851
3852                 for (i = 0; i < sband->n_bitrates; i++) {
3853                         if (sband->bitrates[i].bitrate == rateval) {
3854                                 mcast_rate[band] = i + 1;
3855                                 found = true;
3856                                 break;
3857                         }
3858                 }
3859         }
3860
3861         return found;
3862 }
3863
3864 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3865 {
3866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3867         struct net_device *dev = info->user_ptr[1];
3868         struct cfg80211_ibss_params ibss;
3869         struct wiphy *wiphy;
3870         struct cfg80211_cached_keys *connkeys = NULL;
3871         int err;
3872
3873         memset(&ibss, 0, sizeof(ibss));
3874
3875         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3876                 return -EINVAL;
3877
3878         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3879             !info->attrs[NL80211_ATTR_SSID] ||
3880             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3881                 return -EINVAL;
3882
3883         ibss.beacon_interval = 100;
3884
3885         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3886                 ibss.beacon_interval =
3887                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3888                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3889                         return -EINVAL;
3890         }
3891
3892         if (!rdev->ops->join_ibss)
3893                 return -EOPNOTSUPP;
3894
3895         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3896                 return -EOPNOTSUPP;
3897
3898         wiphy = &rdev->wiphy;
3899
3900         if (info->attrs[NL80211_ATTR_MAC])
3901                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3902         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3903         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3904
3905         if (info->attrs[NL80211_ATTR_IE]) {
3906                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3907                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3908         }
3909
3910         ibss.channel = ieee80211_get_channel(wiphy,
3911                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3912         if (!ibss.channel ||
3913             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3914             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3915                 return -EINVAL;
3916
3917         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3918         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3919
3920         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3921                 u8 *rates =
3922                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3923                 int n_rates =
3924                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3925                 struct ieee80211_supported_band *sband =
3926                         wiphy->bands[ibss.channel->band];
3927                 int i, j;
3928
3929                 if (n_rates == 0)
3930                         return -EINVAL;
3931
3932                 for (i = 0; i < n_rates; i++) {
3933                         int rate = (rates[i] & 0x7f) * 5;
3934                         bool found = false;
3935
3936                         for (j = 0; j < sband->n_bitrates; j++) {
3937                                 if (sband->bitrates[j].bitrate == rate) {
3938                                         found = true;
3939                                         ibss.basic_rates |= BIT(j);
3940                                         break;
3941                                 }
3942                         }
3943                         if (!found)
3944                                 return -EINVAL;
3945                 }
3946         }
3947
3948         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
3949             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
3950                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
3951                 return -EINVAL;
3952
3953         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3954                 connkeys = nl80211_parse_connkeys(rdev,
3955                                         info->attrs[NL80211_ATTR_KEYS]);
3956                 if (IS_ERR(connkeys))
3957                         return PTR_ERR(connkeys);
3958         }
3959
3960         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3961         if (err)
3962                 kfree(connkeys);
3963         return err;
3964 }
3965
3966 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3967 {
3968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3969         struct net_device *dev = info->user_ptr[1];
3970
3971         if (!rdev->ops->leave_ibss)
3972                 return -EOPNOTSUPP;
3973
3974         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3975                 return -EOPNOTSUPP;
3976
3977         return cfg80211_leave_ibss(rdev, dev, false);
3978 }
3979
3980 #ifdef CONFIG_NL80211_TESTMODE
3981 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3982         .name = "testmode",
3983 };
3984
3985 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3986 {
3987         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3988         int err;
3989
3990         if (!info->attrs[NL80211_ATTR_TESTDATA])
3991                 return -EINVAL;
3992
3993         err = -EOPNOTSUPP;
3994         if (rdev->ops->testmode_cmd) {
3995                 rdev->testmode_info = info;
3996                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3997                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3998                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3999                 rdev->testmode_info = NULL;
4000         }
4001
4002         return err;
4003 }
4004
4005 static struct sk_buff *
4006 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4007                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4008 {
4009         struct sk_buff *skb;
4010         void *hdr;
4011         struct nlattr *data;
4012
4013         skb = nlmsg_new(approxlen + 100, gfp);
4014         if (!skb)
4015                 return NULL;
4016
4017         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4018         if (!hdr) {
4019                 kfree_skb(skb);
4020                 return NULL;
4021         }
4022
4023         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4024         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4025
4026         ((void **)skb->cb)[0] = rdev;
4027         ((void **)skb->cb)[1] = hdr;
4028         ((void **)skb->cb)[2] = data;
4029
4030         return skb;
4031
4032  nla_put_failure:
4033         kfree_skb(skb);
4034         return NULL;
4035 }
4036
4037 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4038                                                   int approxlen)
4039 {
4040         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4041
4042         if (WARN_ON(!rdev->testmode_info))
4043                 return NULL;
4044
4045         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4046                                 rdev->testmode_info->snd_pid,
4047                                 rdev->testmode_info->snd_seq,
4048                                 GFP_KERNEL);
4049 }
4050 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4051
4052 int cfg80211_testmode_reply(struct sk_buff *skb)
4053 {
4054         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4055         void *hdr = ((void **)skb->cb)[1];
4056         struct nlattr *data = ((void **)skb->cb)[2];
4057
4058         if (WARN_ON(!rdev->testmode_info)) {
4059                 kfree_skb(skb);
4060                 return -EINVAL;
4061         }
4062
4063         nla_nest_end(skb, data);
4064         genlmsg_end(skb, hdr);
4065         return genlmsg_reply(skb, rdev->testmode_info);
4066 }
4067 EXPORT_SYMBOL(cfg80211_testmode_reply);
4068
4069 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4070                                                   int approxlen, gfp_t gfp)
4071 {
4072         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4073
4074         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4075 }
4076 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4077
4078 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4079 {
4080         void *hdr = ((void **)skb->cb)[1];
4081         struct nlattr *data = ((void **)skb->cb)[2];
4082
4083         nla_nest_end(skb, data);
4084         genlmsg_end(skb, hdr);
4085         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4086 }
4087 EXPORT_SYMBOL(cfg80211_testmode_event);
4088 #endif
4089
4090 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4091 {
4092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4093         struct net_device *dev = info->user_ptr[1];
4094         struct cfg80211_connect_params connect;
4095         struct wiphy *wiphy;
4096         struct cfg80211_cached_keys *connkeys = NULL;
4097         int err;
4098
4099         memset(&connect, 0, sizeof(connect));
4100
4101         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4102                 return -EINVAL;
4103
4104         if (!info->attrs[NL80211_ATTR_SSID] ||
4105             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4106                 return -EINVAL;
4107
4108         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4109                 connect.auth_type =
4110                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4111                 if (!nl80211_valid_auth_type(connect.auth_type))
4112                         return -EINVAL;
4113         } else
4114                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4115
4116         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4117
4118         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4119                                       NL80211_MAX_NR_CIPHER_SUITES);
4120         if (err)
4121                 return err;
4122
4123         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4124             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4125                 return -EOPNOTSUPP;
4126
4127         wiphy = &rdev->wiphy;
4128
4129         if (info->attrs[NL80211_ATTR_MAC])
4130                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4131         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4132         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4133
4134         if (info->attrs[NL80211_ATTR_IE]) {
4135                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4136                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4137         }
4138
4139         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4140                 connect.channel =
4141                         ieee80211_get_channel(wiphy,
4142                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4143                 if (!connect.channel ||
4144                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4145                         return -EINVAL;
4146         }
4147
4148         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4149                 connkeys = nl80211_parse_connkeys(rdev,
4150                                         info->attrs[NL80211_ATTR_KEYS]);
4151                 if (IS_ERR(connkeys))
4152                         return PTR_ERR(connkeys);
4153         }
4154
4155         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4156         if (err)
4157                 kfree(connkeys);
4158         return err;
4159 }
4160
4161 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4162 {
4163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4164         struct net_device *dev = info->user_ptr[1];
4165         u16 reason;
4166
4167         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4168                 reason = WLAN_REASON_DEAUTH_LEAVING;
4169         else
4170                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4171
4172         if (reason == 0)
4173                 return -EINVAL;
4174
4175         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4176             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4177                 return -EOPNOTSUPP;
4178
4179         return cfg80211_disconnect(rdev, dev, reason, true);
4180 }
4181
4182 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4183 {
4184         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4185         struct net *net;
4186         int err;
4187         u32 pid;
4188
4189         if (!info->attrs[NL80211_ATTR_PID])
4190                 return -EINVAL;
4191
4192         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4193
4194         net = get_net_ns_by_pid(pid);
4195         if (IS_ERR(net))
4196                 return PTR_ERR(net);
4197
4198         err = 0;
4199
4200         /* check if anything to do */
4201         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4202                 err = cfg80211_switch_netns(rdev, net);
4203
4204         put_net(net);
4205         return err;
4206 }
4207
4208 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4209 {
4210         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4211         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4212                         struct cfg80211_pmksa *pmksa) = NULL;
4213         struct net_device *dev = info->user_ptr[1];
4214         struct cfg80211_pmksa pmksa;
4215
4216         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4217
4218         if (!info->attrs[NL80211_ATTR_MAC])
4219                 return -EINVAL;
4220
4221         if (!info->attrs[NL80211_ATTR_PMKID])
4222                 return -EINVAL;
4223
4224         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4225         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4226
4227         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4228             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4229                 return -EOPNOTSUPP;
4230
4231         switch (info->genlhdr->cmd) {
4232         case NL80211_CMD_SET_PMKSA:
4233                 rdev_ops = rdev->ops->set_pmksa;
4234                 break;
4235         case NL80211_CMD_DEL_PMKSA:
4236                 rdev_ops = rdev->ops->del_pmksa;
4237                 break;
4238         default:
4239                 WARN_ON(1);
4240                 break;
4241         }
4242
4243         if (!rdev_ops)
4244                 return -EOPNOTSUPP;
4245
4246         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4247 }
4248
4249 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4250 {
4251         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4252         struct net_device *dev = info->user_ptr[1];
4253
4254         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4255             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4256                 return -EOPNOTSUPP;
4257
4258         if (!rdev->ops->flush_pmksa)
4259                 return -EOPNOTSUPP;
4260
4261         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4262 }
4263
4264 static int nl80211_remain_on_channel(struct sk_buff *skb,
4265                                      struct genl_info *info)
4266 {
4267         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4268         struct net_device *dev = info->user_ptr[1];
4269         struct ieee80211_channel *chan;
4270         struct sk_buff *msg;
4271         void *hdr;
4272         u64 cookie;
4273         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4274         u32 freq, duration;
4275         int err;
4276
4277         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4278             !info->attrs[NL80211_ATTR_DURATION])
4279                 return -EINVAL;
4280
4281         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4282
4283         /*
4284          * We should be on that channel for at least one jiffie,
4285          * and more than 5 seconds seems excessive.
4286          */
4287         if (!duration || !msecs_to_jiffies(duration) ||
4288             duration > rdev->wiphy.max_remain_on_channel_duration)
4289                 return -EINVAL;
4290
4291         if (!rdev->ops->remain_on_channel)
4292                 return -EOPNOTSUPP;
4293
4294         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4295                 channel_type = nla_get_u32(
4296                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4297                 if (channel_type != NL80211_CHAN_NO_HT &&
4298                     channel_type != NL80211_CHAN_HT20 &&
4299                     channel_type != NL80211_CHAN_HT40PLUS &&
4300                     channel_type != NL80211_CHAN_HT40MINUS)
4301                         return -EINVAL;
4302         }
4303
4304         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4305         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4306         if (chan == NULL)
4307                 return -EINVAL;
4308
4309         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4310         if (!msg)
4311                 return -ENOMEM;
4312
4313         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4314                              NL80211_CMD_REMAIN_ON_CHANNEL);
4315
4316         if (IS_ERR(hdr)) {
4317                 err = PTR_ERR(hdr);
4318                 goto free_msg;
4319         }
4320
4321         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4322                                            channel_type, duration, &cookie);
4323
4324         if (err)
4325                 goto free_msg;
4326
4327         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4328
4329         genlmsg_end(msg, hdr);
4330
4331         return genlmsg_reply(msg, info);
4332
4333  nla_put_failure:
4334         err = -ENOBUFS;
4335  free_msg:
4336         nlmsg_free(msg);
4337         return err;
4338 }
4339
4340 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4341                                             struct genl_info *info)
4342 {
4343         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4344         struct net_device *dev = info->user_ptr[1];
4345         u64 cookie;
4346
4347         if (!info->attrs[NL80211_ATTR_COOKIE])
4348                 return -EINVAL;
4349
4350         if (!rdev->ops->cancel_remain_on_channel)
4351                 return -EOPNOTSUPP;
4352
4353         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4354
4355         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4356 }
4357
4358 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4359                            u8 *rates, u8 rates_len)
4360 {
4361         u8 i;
4362         u32 mask = 0;
4363
4364         for (i = 0; i < rates_len; i++) {
4365                 int rate = (rates[i] & 0x7f) * 5;
4366                 int ridx;
4367                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4368                         struct ieee80211_rate *srate =
4369                                 &sband->bitrates[ridx];
4370                         if (rate == srate->bitrate) {
4371                                 mask |= 1 << ridx;
4372                                 break;
4373                         }
4374                 }
4375                 if (ridx == sband->n_bitrates)
4376                         return 0; /* rate not found */
4377         }
4378
4379         return mask;
4380 }
4381
4382 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4383         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4384                                     .len = NL80211_MAX_SUPP_RATES },
4385 };
4386
4387 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4388                                        struct genl_info *info)
4389 {
4390         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4391         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4392         struct cfg80211_bitrate_mask mask;
4393         int rem, i;
4394         struct net_device *dev = info->user_ptr[1];
4395         struct nlattr *tx_rates;
4396         struct ieee80211_supported_band *sband;
4397
4398         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4399                 return -EINVAL;
4400
4401         if (!rdev->ops->set_bitrate_mask)
4402                 return -EOPNOTSUPP;
4403
4404         memset(&mask, 0, sizeof(mask));
4405         /* Default to all rates enabled */
4406         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4407                 sband = rdev->wiphy.bands[i];
4408                 mask.control[i].legacy =
4409                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4410         }
4411
4412         /*
4413          * The nested attribute uses enum nl80211_band as the index. This maps
4414          * directly to the enum ieee80211_band values used in cfg80211.
4415          */
4416         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4417         {
4418                 enum ieee80211_band band = nla_type(tx_rates);
4419                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4420                         return -EINVAL;
4421                 sband = rdev->wiphy.bands[band];
4422                 if (sband == NULL)
4423                         return -EINVAL;
4424                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4425                           nla_len(tx_rates), nl80211_txattr_policy);
4426                 if (tb[NL80211_TXRATE_LEGACY]) {
4427                         mask.control[band].legacy = rateset_to_mask(
4428                                 sband,
4429                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4430                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4431                         if (mask.control[band].legacy == 0)
4432                                 return -EINVAL;
4433                 }
4434         }
4435
4436         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4437 }
4438
4439 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4440 {
4441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4442         struct net_device *dev = info->user_ptr[1];
4443         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4444
4445         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4446                 return -EINVAL;
4447
4448         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4449                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4450
4451         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4452             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4453             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4454             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4455             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4456             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4457             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4458                 return -EOPNOTSUPP;
4459
4460         /* not much point in registering if we can't reply */
4461         if (!rdev->ops->mgmt_tx)
4462                 return -EOPNOTSUPP;
4463
4464         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4465                         frame_type,
4466                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4467                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4468 }
4469
4470 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4471 {
4472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4473         struct net_device *dev = info->user_ptr[1];
4474         struct ieee80211_channel *chan;
4475         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4476         bool channel_type_valid = false;
4477         u32 freq;
4478         int err;
4479         void *hdr;
4480         u64 cookie;
4481         struct sk_buff *msg;
4482         unsigned int wait = 0;
4483         bool offchan;
4484
4485         if (!info->attrs[NL80211_ATTR_FRAME] ||
4486             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4487                 return -EINVAL;
4488
4489         if (!rdev->ops->mgmt_tx)
4490                 return -EOPNOTSUPP;
4491
4492         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4493             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4494             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4495             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4496             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4497             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4498             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4499                 return -EOPNOTSUPP;
4500
4501         if (info->attrs[NL80211_ATTR_DURATION]) {
4502                 if (!rdev->ops->mgmt_tx_cancel_wait)
4503                         return -EINVAL;
4504                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4505         }
4506
4507         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4508                 channel_type = nla_get_u32(
4509                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4510                 if (channel_type != NL80211_CHAN_NO_HT &&
4511                     channel_type != NL80211_CHAN_HT20 &&
4512                     channel_type != NL80211_CHAN_HT40PLUS &&
4513                     channel_type != NL80211_CHAN_HT40MINUS)
4514                         return -EINVAL;
4515                 channel_type_valid = true;
4516         }
4517
4518         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4519
4520         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4521         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4522         if (chan == NULL)
4523                 return -EINVAL;
4524
4525         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4526         if (!msg)
4527                 return -ENOMEM;
4528
4529         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4530                              NL80211_CMD_FRAME);
4531
4532         if (IS_ERR(hdr)) {
4533                 err = PTR_ERR(hdr);
4534                 goto free_msg;
4535         }
4536         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4537                                     channel_type_valid, wait,
4538                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4539                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4540                                     &cookie);
4541         if (err)
4542                 goto free_msg;
4543
4544         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4545
4546         genlmsg_end(msg, hdr);
4547         return genlmsg_reply(msg, info);
4548
4549  nla_put_failure:
4550         err = -ENOBUFS;
4551  free_msg:
4552         nlmsg_free(msg);
4553         return err;
4554 }
4555
4556 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4557 {
4558         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4559         struct net_device *dev = info->user_ptr[1];
4560         u64 cookie;
4561
4562         if (!info->attrs[NL80211_ATTR_COOKIE])
4563                 return -EINVAL;
4564
4565         if (!rdev->ops->mgmt_tx_cancel_wait)
4566                 return -EOPNOTSUPP;
4567
4568         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4569             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4570             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4571             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4572             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4573             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4574                 return -EOPNOTSUPP;
4575
4576         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4577
4578         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4579 }
4580
4581 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4582 {
4583         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4584         struct wireless_dev *wdev;
4585         struct net_device *dev = info->user_ptr[1];
4586         u8 ps_state;
4587         bool state;
4588         int err;
4589
4590         if (!info->attrs[NL80211_ATTR_PS_STATE])
4591                 return -EINVAL;
4592
4593         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4594
4595         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4596                 return -EINVAL;
4597
4598         wdev = dev->ieee80211_ptr;
4599
4600         if (!rdev->ops->set_power_mgmt)
4601                 return -EOPNOTSUPP;
4602
4603         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4604
4605         if (state == wdev->ps)
4606                 return 0;
4607
4608         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4609                                         wdev->ps_timeout);
4610         if (!err)
4611                 wdev->ps = state;
4612         return err;
4613 }
4614
4615 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4616 {
4617         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4618         enum nl80211_ps_state ps_state;
4619         struct wireless_dev *wdev;
4620         struct net_device *dev = info->user_ptr[1];
4621         struct sk_buff *msg;
4622         void *hdr;
4623         int err;
4624
4625         wdev = dev->ieee80211_ptr;
4626
4627         if (!rdev->ops->set_power_mgmt)
4628                 return -EOPNOTSUPP;
4629
4630         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4631         if (!msg)
4632                 return -ENOMEM;
4633
4634         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4635                              NL80211_CMD_GET_POWER_SAVE);
4636         if (!hdr) {
4637                 err = -ENOBUFS;
4638                 goto free_msg;
4639         }
4640
4641         if (wdev->ps)
4642                 ps_state = NL80211_PS_ENABLED;
4643         else
4644                 ps_state = NL80211_PS_DISABLED;
4645
4646         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4647
4648         genlmsg_end(msg, hdr);
4649         return genlmsg_reply(msg, info);
4650
4651  nla_put_failure:
4652         err = -ENOBUFS;
4653  free_msg:
4654         nlmsg_free(msg);
4655         return err;
4656 }
4657
4658 static struct nla_policy
4659 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4660         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4661         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4662         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4663 };
4664
4665 static int nl80211_set_cqm_rssi(struct genl_info *info,
4666                                 s32 threshold, u32 hysteresis)
4667 {
4668         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4669         struct wireless_dev *wdev;
4670         struct net_device *dev = info->user_ptr[1];
4671
4672         if (threshold > 0)
4673                 return -EINVAL;
4674
4675         wdev = dev->ieee80211_ptr;
4676
4677         if (!rdev->ops->set_cqm_rssi_config)
4678                 return -EOPNOTSUPP;
4679
4680         if (wdev->iftype != NL80211_IFTYPE_STATION &&
4681             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4682                 return -EOPNOTSUPP;
4683
4684         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4685                                               threshold, hysteresis);
4686 }
4687
4688 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4689 {
4690         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4691         struct nlattr *cqm;
4692         int err;
4693
4694         cqm = info->attrs[NL80211_ATTR_CQM];
4695         if (!cqm) {
4696                 err = -EINVAL;
4697                 goto out;
4698         }
4699
4700         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4701                                nl80211_attr_cqm_policy);
4702         if (err)
4703                 goto out;
4704
4705         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4706             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4707                 s32 threshold;
4708                 u32 hysteresis;
4709                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4710                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4711                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4712         } else
4713                 err = -EINVAL;
4714
4715 out:
4716         return err;
4717 }
4718
4719 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
4720 {
4721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4722         struct net_device *dev = info->user_ptr[1];
4723         struct mesh_config cfg;
4724         struct mesh_setup setup;
4725         int err;
4726
4727         /* start with default */
4728         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
4729         memcpy(&setup, &default_mesh_setup, sizeof(setup));
4730
4731         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
4732                 /* and parse parameters if given */
4733                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
4734                 if (err)
4735                         return err;
4736         }
4737
4738         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
4739             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
4740                 return -EINVAL;
4741
4742         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
4743         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
4744
4745         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
4746                 /* parse additional setup parameters if given */
4747                 err = nl80211_parse_mesh_setup(info, &setup);
4748                 if (err)
4749                         return err;
4750         }
4751
4752         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
4753 }
4754
4755 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
4756 {
4757         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4758         struct net_device *dev = info->user_ptr[1];
4759
4760         return cfg80211_leave_mesh(rdev, dev);
4761 }
4762
4763 #define NL80211_FLAG_NEED_WIPHY         0x01
4764 #define NL80211_FLAG_NEED_NETDEV        0x02
4765 #define NL80211_FLAG_NEED_RTNL          0x04
4766 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
4767 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
4768                                          NL80211_FLAG_CHECK_NETDEV_UP)
4769
4770 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4771                             struct genl_info *info)
4772 {
4773         struct cfg80211_registered_device *rdev;
4774         struct net_device *dev;
4775         int err;
4776         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4777
4778         if (rtnl)
4779                 rtnl_lock();
4780
4781         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4782                 rdev = cfg80211_get_dev_from_info(info);
4783                 if (IS_ERR(rdev)) {
4784                         if (rtnl)
4785                                 rtnl_unlock();
4786                         return PTR_ERR(rdev);
4787                 }
4788                 info->user_ptr[0] = rdev;
4789         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4790                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4791                 if (err) {
4792                         if (rtnl)
4793                                 rtnl_unlock();
4794                         return err;
4795                 }
4796                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4797                     !netif_running(dev)) {
4798                         cfg80211_unlock_rdev(rdev);
4799                         dev_put(dev);
4800                         if (rtnl)
4801                                 rtnl_unlock();
4802                         return -ENETDOWN;
4803                 }
4804                 info->user_ptr[0] = rdev;
4805                 info->user_ptr[1] = dev;
4806         }
4807
4808         return 0;
4809 }
4810
4811 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4812                               struct genl_info *info)
4813 {
4814         if (info->user_ptr[0])
4815                 cfg80211_unlock_rdev(info->user_ptr[0]);
4816         if (info->user_ptr[1])
4817                 dev_put(info->user_ptr[1]);
4818         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4819                 rtnl_unlock();
4820 }
4821
4822 static struct genl_ops nl80211_ops[] = {
4823         {
4824                 .cmd = NL80211_CMD_GET_WIPHY,
4825                 .doit = nl80211_get_wiphy,
4826                 .dumpit = nl80211_dump_wiphy,
4827                 .policy = nl80211_policy,
4828                 /* can be retrieved by unprivileged users */
4829                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4830         },
4831         {
4832                 .cmd = NL80211_CMD_SET_WIPHY,
4833                 .doit = nl80211_set_wiphy,
4834                 .policy = nl80211_policy,
4835                 .flags = GENL_ADMIN_PERM,
4836                 .internal_flags = NL80211_FLAG_NEED_RTNL,
4837         },
4838         {
4839                 .cmd = NL80211_CMD_GET_INTERFACE,
4840                 .doit = nl80211_get_interface,
4841                 .dumpit = nl80211_dump_interface,
4842                 .policy = nl80211_policy,
4843                 /* can be retrieved by unprivileged users */
4844                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4845         },
4846         {
4847                 .cmd = NL80211_CMD_SET_INTERFACE,
4848                 .doit = nl80211_set_interface,
4849                 .policy = nl80211_policy,
4850                 .flags = GENL_ADMIN_PERM,
4851                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4852                                   NL80211_FLAG_NEED_RTNL,
4853         },
4854         {
4855                 .cmd = NL80211_CMD_NEW_INTERFACE,
4856                 .doit = nl80211_new_interface,
4857                 .policy = nl80211_policy,
4858                 .flags = GENL_ADMIN_PERM,
4859                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4860                                   NL80211_FLAG_NEED_RTNL,
4861         },
4862         {
4863                 .cmd = NL80211_CMD_DEL_INTERFACE,
4864                 .doit = nl80211_del_interface,
4865                 .policy = nl80211_policy,
4866                 .flags = GENL_ADMIN_PERM,
4867                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4868                                   NL80211_FLAG_NEED_RTNL,
4869         },
4870         {
4871                 .cmd = NL80211_CMD_GET_KEY,
4872                 .doit = nl80211_get_key,
4873                 .policy = nl80211_policy,
4874                 .flags = GENL_ADMIN_PERM,
4875                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4876                                   NL80211_FLAG_NEED_RTNL,
4877         },
4878         {
4879                 .cmd = NL80211_CMD_SET_KEY,
4880                 .doit = nl80211_set_key,
4881                 .policy = nl80211_policy,
4882                 .flags = GENL_ADMIN_PERM,
4883                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4884                                   NL80211_FLAG_NEED_RTNL,
4885         },
4886         {
4887                 .cmd = NL80211_CMD_NEW_KEY,
4888                 .doit = nl80211_new_key,
4889                 .policy = nl80211_policy,
4890                 .flags = GENL_ADMIN_PERM,
4891                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4892                                   NL80211_FLAG_NEED_RTNL,
4893         },
4894         {
4895                 .cmd = NL80211_CMD_DEL_KEY,
4896                 .doit = nl80211_del_key,
4897                 .policy = nl80211_policy,
4898                 .flags = GENL_ADMIN_PERM,
4899                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4900                                   NL80211_FLAG_NEED_RTNL,
4901         },
4902         {
4903                 .cmd = NL80211_CMD_SET_BEACON,
4904                 .policy = nl80211_policy,
4905                 .flags = GENL_ADMIN_PERM,
4906                 .doit = nl80211_addset_beacon,
4907                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4908                                   NL80211_FLAG_NEED_RTNL,
4909         },
4910         {
4911                 .cmd = NL80211_CMD_NEW_BEACON,
4912                 .policy = nl80211_policy,
4913                 .flags = GENL_ADMIN_PERM,
4914                 .doit = nl80211_addset_beacon,
4915                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4916                                   NL80211_FLAG_NEED_RTNL,
4917         },
4918         {
4919                 .cmd = NL80211_CMD_DEL_BEACON,
4920                 .policy = nl80211_policy,
4921                 .flags = GENL_ADMIN_PERM,
4922                 .doit = nl80211_del_beacon,
4923                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4924                                   NL80211_FLAG_NEED_RTNL,
4925         },
4926         {
4927                 .cmd = NL80211_CMD_GET_STATION,
4928                 .doit = nl80211_get_station,
4929                 .dumpit = nl80211_dump_station,
4930                 .policy = nl80211_policy,
4931                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4932                                   NL80211_FLAG_NEED_RTNL,
4933         },
4934         {
4935                 .cmd = NL80211_CMD_SET_STATION,
4936                 .doit = nl80211_set_station,
4937                 .policy = nl80211_policy,
4938                 .flags = GENL_ADMIN_PERM,
4939                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4940                                   NL80211_FLAG_NEED_RTNL,
4941         },
4942         {
4943                 .cmd = NL80211_CMD_NEW_STATION,
4944                 .doit = nl80211_new_station,
4945                 .policy = nl80211_policy,
4946                 .flags = GENL_ADMIN_PERM,
4947                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4948                                   NL80211_FLAG_NEED_RTNL,
4949         },
4950         {
4951                 .cmd = NL80211_CMD_DEL_STATION,
4952                 .doit = nl80211_del_station,
4953                 .policy = nl80211_policy,
4954                 .flags = GENL_ADMIN_PERM,
4955                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4956                                   NL80211_FLAG_NEED_RTNL,
4957         },
4958         {
4959                 .cmd = NL80211_CMD_GET_MPATH,
4960                 .doit = nl80211_get_mpath,
4961                 .dumpit = nl80211_dump_mpath,
4962                 .policy = nl80211_policy,
4963                 .flags = GENL_ADMIN_PERM,
4964                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4965                                   NL80211_FLAG_NEED_RTNL,
4966         },
4967         {
4968                 .cmd = NL80211_CMD_SET_MPATH,
4969                 .doit = nl80211_set_mpath,
4970                 .policy = nl80211_policy,
4971                 .flags = GENL_ADMIN_PERM,
4972                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4973                                   NL80211_FLAG_NEED_RTNL,
4974         },
4975         {
4976                 .cmd = NL80211_CMD_NEW_MPATH,
4977                 .doit = nl80211_new_mpath,
4978                 .policy = nl80211_policy,
4979                 .flags = GENL_ADMIN_PERM,
4980                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4981                                   NL80211_FLAG_NEED_RTNL,
4982         },
4983         {
4984                 .cmd = NL80211_CMD_DEL_MPATH,
4985                 .doit = nl80211_del_mpath,
4986                 .policy = nl80211_policy,
4987                 .flags = GENL_ADMIN_PERM,
4988                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4989                                   NL80211_FLAG_NEED_RTNL,
4990         },
4991         {
4992                 .cmd = NL80211_CMD_SET_BSS,
4993                 .doit = nl80211_set_bss,
4994                 .policy = nl80211_policy,
4995                 .flags = GENL_ADMIN_PERM,
4996                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4997                                   NL80211_FLAG_NEED_RTNL,
4998         },
4999         {
5000                 .cmd = NL80211_CMD_GET_REG,
5001                 .doit = nl80211_get_reg,
5002                 .policy = nl80211_policy,
5003                 /* can be retrieved by unprivileged users */
5004         },
5005         {
5006                 .cmd = NL80211_CMD_SET_REG,
5007                 .doit = nl80211_set_reg,
5008                 .policy = nl80211_policy,
5009                 .flags = GENL_ADMIN_PERM,
5010         },
5011         {
5012                 .cmd = NL80211_CMD_REQ_SET_REG,
5013                 .doit = nl80211_req_set_reg,
5014                 .policy = nl80211_policy,
5015                 .flags = GENL_ADMIN_PERM,
5016         },
5017         {
5018                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
5019                 .doit = nl80211_get_mesh_config,
5020                 .policy = nl80211_policy,
5021                 /* can be retrieved by unprivileged users */
5022                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5023                                   NL80211_FLAG_NEED_RTNL,
5024         },
5025         {
5026                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
5027                 .doit = nl80211_update_mesh_config,
5028                 .policy = nl80211_policy,
5029                 .flags = GENL_ADMIN_PERM,
5030                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5031                                   NL80211_FLAG_NEED_RTNL,
5032         },
5033         {
5034                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5035                 .doit = nl80211_trigger_scan,
5036                 .policy = nl80211_policy,
5037                 .flags = GENL_ADMIN_PERM,
5038                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5039                                   NL80211_FLAG_NEED_RTNL,
5040         },
5041         {
5042                 .cmd = NL80211_CMD_GET_SCAN,
5043                 .policy = nl80211_policy,
5044                 .dumpit = nl80211_dump_scan,
5045         },
5046         {
5047                 .cmd = NL80211_CMD_AUTHENTICATE,
5048                 .doit = nl80211_authenticate,
5049                 .policy = nl80211_policy,
5050                 .flags = GENL_ADMIN_PERM,
5051                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5052                                   NL80211_FLAG_NEED_RTNL,
5053         },
5054         {
5055                 .cmd = NL80211_CMD_ASSOCIATE,
5056                 .doit = nl80211_associate,
5057                 .policy = nl80211_policy,
5058                 .flags = GENL_ADMIN_PERM,
5059                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5060                                   NL80211_FLAG_NEED_RTNL,
5061         },
5062         {
5063                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5064                 .doit = nl80211_deauthenticate,
5065                 .policy = nl80211_policy,
5066                 .flags = GENL_ADMIN_PERM,
5067                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5068                                   NL80211_FLAG_NEED_RTNL,
5069         },
5070         {
5071                 .cmd = NL80211_CMD_DISASSOCIATE,
5072                 .doit = nl80211_disassociate,
5073                 .policy = nl80211_policy,
5074                 .flags = GENL_ADMIN_PERM,
5075                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5076                                   NL80211_FLAG_NEED_RTNL,
5077         },
5078         {
5079                 .cmd = NL80211_CMD_JOIN_IBSS,
5080                 .doit = nl80211_join_ibss,
5081                 .policy = nl80211_policy,
5082                 .flags = GENL_ADMIN_PERM,
5083                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5084                                   NL80211_FLAG_NEED_RTNL,
5085         },
5086         {
5087                 .cmd = NL80211_CMD_LEAVE_IBSS,
5088                 .doit = nl80211_leave_ibss,
5089                 .policy = nl80211_policy,
5090                 .flags = GENL_ADMIN_PERM,
5091                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5092                                   NL80211_FLAG_NEED_RTNL,
5093         },
5094 #ifdef CONFIG_NL80211_TESTMODE
5095         {
5096                 .cmd = NL80211_CMD_TESTMODE,
5097                 .doit = nl80211_testmode_do,
5098                 .policy = nl80211_policy,
5099                 .flags = GENL_ADMIN_PERM,
5100                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5101                                   NL80211_FLAG_NEED_RTNL,
5102         },
5103 #endif
5104         {
5105                 .cmd = NL80211_CMD_CONNECT,
5106                 .doit = nl80211_connect,
5107                 .policy = nl80211_policy,
5108                 .flags = GENL_ADMIN_PERM,
5109                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5110                                   NL80211_FLAG_NEED_RTNL,
5111         },
5112         {
5113                 .cmd = NL80211_CMD_DISCONNECT,
5114                 .doit = nl80211_disconnect,
5115                 .policy = nl80211_policy,
5116                 .flags = GENL_ADMIN_PERM,
5117                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5118                                   NL80211_FLAG_NEED_RTNL,
5119         },
5120         {
5121                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5122                 .doit = nl80211_wiphy_netns,
5123                 .policy = nl80211_policy,
5124                 .flags = GENL_ADMIN_PERM,
5125                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5126                                   NL80211_FLAG_NEED_RTNL,
5127         },
5128         {
5129                 .cmd = NL80211_CMD_GET_SURVEY,
5130                 .policy = nl80211_policy,
5131                 .dumpit = nl80211_dump_survey,
5132         },
5133         {
5134                 .cmd = NL80211_CMD_SET_PMKSA,
5135                 .doit = nl80211_setdel_pmksa,
5136                 .policy = nl80211_policy,
5137                 .flags = GENL_ADMIN_PERM,
5138                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5139                                   NL80211_FLAG_NEED_RTNL,
5140         },
5141         {
5142                 .cmd = NL80211_CMD_DEL_PMKSA,
5143                 .doit = nl80211_setdel_pmksa,
5144                 .policy = nl80211_policy,
5145                 .flags = GENL_ADMIN_PERM,
5146                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5147                                   NL80211_FLAG_NEED_RTNL,
5148         },
5149         {
5150                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5151                 .doit = nl80211_flush_pmksa,
5152                 .policy = nl80211_policy,
5153                 .flags = GENL_ADMIN_PERM,
5154                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5155                                   NL80211_FLAG_NEED_RTNL,
5156         },
5157         {
5158                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5159                 .doit = nl80211_remain_on_channel,
5160                 .policy = nl80211_policy,
5161                 .flags = GENL_ADMIN_PERM,
5162                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5163                                   NL80211_FLAG_NEED_RTNL,
5164         },
5165         {
5166                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5167                 .doit = nl80211_cancel_remain_on_channel,
5168                 .policy = nl80211_policy,
5169                 .flags = GENL_ADMIN_PERM,
5170                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5171                                   NL80211_FLAG_NEED_RTNL,
5172         },
5173         {
5174                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5175                 .doit = nl80211_set_tx_bitrate_mask,
5176                 .policy = nl80211_policy,
5177                 .flags = GENL_ADMIN_PERM,
5178                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5179                                   NL80211_FLAG_NEED_RTNL,
5180         },
5181         {
5182                 .cmd = NL80211_CMD_REGISTER_FRAME,
5183                 .doit = nl80211_register_mgmt,
5184                 .policy = nl80211_policy,
5185                 .flags = GENL_ADMIN_PERM,
5186                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5187                                   NL80211_FLAG_NEED_RTNL,
5188         },
5189         {
5190                 .cmd = NL80211_CMD_FRAME,
5191                 .doit = nl80211_tx_mgmt,
5192                 .policy = nl80211_policy,
5193                 .flags = GENL_ADMIN_PERM,
5194                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5195                                   NL80211_FLAG_NEED_RTNL,
5196         },
5197         {
5198                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5199                 .doit = nl80211_tx_mgmt_cancel_wait,
5200                 .policy = nl80211_policy,
5201                 .flags = GENL_ADMIN_PERM,
5202                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5203                                   NL80211_FLAG_NEED_RTNL,
5204         },
5205         {
5206                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5207                 .doit = nl80211_set_power_save,
5208                 .policy = nl80211_policy,
5209                 .flags = GENL_ADMIN_PERM,
5210                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5211                                   NL80211_FLAG_NEED_RTNL,
5212         },
5213         {
5214                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5215                 .doit = nl80211_get_power_save,
5216                 .policy = nl80211_policy,
5217                 /* can be retrieved by unprivileged users */
5218                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5219                                   NL80211_FLAG_NEED_RTNL,
5220         },
5221         {
5222                 .cmd = NL80211_CMD_SET_CQM,
5223                 .doit = nl80211_set_cqm,
5224                 .policy = nl80211_policy,
5225                 .flags = GENL_ADMIN_PERM,
5226                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5227                                   NL80211_FLAG_NEED_RTNL,
5228         },
5229         {
5230                 .cmd = NL80211_CMD_SET_CHANNEL,
5231                 .doit = nl80211_set_channel,
5232                 .policy = nl80211_policy,
5233                 .flags = GENL_ADMIN_PERM,
5234                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5235                                   NL80211_FLAG_NEED_RTNL,
5236         },
5237         {
5238                 .cmd = NL80211_CMD_SET_WDS_PEER,
5239                 .doit = nl80211_set_wds_peer,
5240                 .policy = nl80211_policy,
5241                 .flags = GENL_ADMIN_PERM,
5242                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5243                                   NL80211_FLAG_NEED_RTNL,
5244         },
5245         {
5246                 .cmd = NL80211_CMD_JOIN_MESH,
5247                 .doit = nl80211_join_mesh,
5248                 .policy = nl80211_policy,
5249                 .flags = GENL_ADMIN_PERM,
5250                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5251                                   NL80211_FLAG_NEED_RTNL,
5252         },
5253         {
5254                 .cmd = NL80211_CMD_LEAVE_MESH,
5255                 .doit = nl80211_leave_mesh,
5256                 .policy = nl80211_policy,
5257                 .flags = GENL_ADMIN_PERM,
5258                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5259                                   NL80211_FLAG_NEED_RTNL,
5260         },
5261 };
5262
5263 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5264         .name = "mlme",
5265 };
5266
5267 /* multicast groups */
5268 static struct genl_multicast_group nl80211_config_mcgrp = {
5269         .name = "config",
5270 };
5271 static struct genl_multicast_group nl80211_scan_mcgrp = {
5272         .name = "scan",
5273 };
5274 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5275         .name = "regulatory",
5276 };
5277
5278 /* notification functions */
5279
5280 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5281 {
5282         struct sk_buff *msg;
5283
5284         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5285         if (!msg)
5286                 return;
5287
5288         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5289                 nlmsg_free(msg);
5290                 return;
5291         }
5292
5293         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5294                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5295 }
5296
5297 static int nl80211_add_scan_req(struct sk_buff *msg,
5298                                 struct cfg80211_registered_device *rdev)
5299 {
5300         struct cfg80211_scan_request *req = rdev->scan_req;
5301         struct nlattr *nest;
5302         int i;
5303
5304         ASSERT_RDEV_LOCK(rdev);
5305
5306         if (WARN_ON(!req))
5307                 return 0;
5308
5309         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5310         if (!nest)
5311                 goto nla_put_failure;
5312         for (i = 0; i < req->n_ssids; i++)
5313                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5314         nla_nest_end(msg, nest);
5315
5316         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5317         if (!nest)
5318                 goto nla_put_failure;
5319         for (i = 0; i < req->n_channels; i++)
5320                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5321         nla_nest_end(msg, nest);
5322
5323         if (req->ie)
5324                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5325
5326         return 0;
5327  nla_put_failure:
5328         return -ENOBUFS;
5329 }
5330
5331 static int nl80211_send_scan_msg(struct sk_buff *msg,
5332                                  struct cfg80211_registered_device *rdev,
5333                                  struct net_device *netdev,
5334                                  u32 pid, u32 seq, int flags,
5335                                  u32 cmd)
5336 {
5337         void *hdr;
5338
5339         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5340         if (!hdr)
5341                 return -1;
5342
5343         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5344         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5345
5346         /* ignore errors and send incomplete event anyway */
5347         nl80211_add_scan_req(msg, rdev);
5348
5349         return genlmsg_end(msg, hdr);
5350
5351  nla_put_failure:
5352         genlmsg_cancel(msg, hdr);
5353         return -EMSGSIZE;
5354 }
5355
5356 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5357                              struct net_device *netdev)
5358 {
5359         struct sk_buff *msg;
5360
5361         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5362         if (!msg)
5363                 return;
5364
5365         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5366                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5367                 nlmsg_free(msg);
5368                 return;
5369         }
5370
5371         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5372                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5373 }
5374
5375 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5376                             struct net_device *netdev)
5377 {
5378         struct sk_buff *msg;
5379
5380         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5381         if (!msg)
5382                 return;
5383
5384         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5385                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5386                 nlmsg_free(msg);
5387                 return;
5388         }
5389
5390         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5391                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5392 }
5393
5394 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5395                                struct net_device *netdev)
5396 {
5397         struct sk_buff *msg;
5398
5399         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5400         if (!msg)
5401                 return;
5402
5403         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5404                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5405                 nlmsg_free(msg);
5406                 return;
5407         }
5408
5409         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5410                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5411 }
5412
5413 /*
5414  * This can happen on global regulatory changes or device specific settings
5415  * based on custom world regulatory domains.
5416  */
5417 void nl80211_send_reg_change_event(struct regulatory_request *request)
5418 {
5419         struct sk_buff *msg;
5420         void *hdr;
5421
5422         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5423         if (!msg)
5424                 return;
5425
5426         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5427         if (!hdr) {
5428                 nlmsg_free(msg);
5429                 return;
5430         }
5431
5432         /* Userspace can always count this one always being set */
5433         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5434
5435         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5436                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5437                            NL80211_REGDOM_TYPE_WORLD);
5438         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5439                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5440                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5441         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5442                  request->intersect)
5443                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5444                            NL80211_REGDOM_TYPE_INTERSECTION);
5445         else {
5446                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5447                            NL80211_REGDOM_TYPE_COUNTRY);
5448                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5449         }
5450
5451         if (wiphy_idx_valid(request->wiphy_idx))
5452                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5453
5454         if (genlmsg_end(msg, hdr) < 0) {
5455                 nlmsg_free(msg);
5456                 return;
5457         }
5458
5459         rcu_read_lock();
5460         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5461                                 GFP_ATOMIC);
5462         rcu_read_unlock();
5463
5464         return;
5465
5466 nla_put_failure:
5467         genlmsg_cancel(msg, hdr);
5468         nlmsg_free(msg);
5469 }
5470
5471 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5472                                     struct net_device *netdev,
5473                                     const u8 *buf, size_t len,
5474                                     enum nl80211_commands cmd, gfp_t gfp)
5475 {
5476         struct sk_buff *msg;
5477         void *hdr;
5478
5479         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5480         if (!msg)
5481                 return;
5482
5483         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5484         if (!hdr) {
5485                 nlmsg_free(msg);
5486                 return;
5487         }
5488
5489         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5490         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5491         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5492
5493         if (genlmsg_end(msg, hdr) < 0) {
5494                 nlmsg_free(msg);
5495                 return;
5496         }
5497
5498         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5499                                 nl80211_mlme_mcgrp.id, gfp);
5500         return;
5501
5502  nla_put_failure:
5503         genlmsg_cancel(msg, hdr);
5504         nlmsg_free(msg);
5505 }
5506
5507 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5508                           struct net_device *netdev, const u8 *buf,
5509                           size_t len, gfp_t gfp)
5510 {
5511         nl80211_send_mlme_event(rdev, netdev, buf, len,
5512                                 NL80211_CMD_AUTHENTICATE, gfp);
5513 }
5514
5515 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5516                            struct net_device *netdev, const u8 *buf,
5517                            size_t len, gfp_t gfp)
5518 {
5519         nl80211_send_mlme_event(rdev, netdev, buf, len,
5520                                 NL80211_CMD_ASSOCIATE, gfp);
5521 }
5522
5523 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5524                          struct net_device *netdev, const u8 *buf,
5525                          size_t len, gfp_t gfp)
5526 {
5527         nl80211_send_mlme_event(rdev, netdev, buf, len,
5528                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5529 }
5530
5531 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5532                            struct net_device *netdev, const u8 *buf,
5533                            size_t len, gfp_t gfp)
5534 {
5535         nl80211_send_mlme_event(rdev, netdev, buf, len,
5536                                 NL80211_CMD_DISASSOCIATE, gfp);
5537 }
5538
5539 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
5540                                 struct net_device *netdev, const u8 *buf,
5541                                 size_t len, gfp_t gfp)
5542 {
5543         nl80211_send_mlme_event(rdev, netdev, buf, len,
5544                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
5545 }
5546
5547 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
5548                                   struct net_device *netdev, const u8 *buf,
5549                                   size_t len, gfp_t gfp)
5550 {
5551         nl80211_send_mlme_event(rdev, netdev, buf, len,
5552                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
5553 }
5554
5555 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5556                                       struct net_device *netdev, int cmd,
5557                                       const u8 *addr, gfp_t gfp)
5558 {
5559         struct sk_buff *msg;
5560         void *hdr;
5561
5562         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5563         if (!msg)
5564                 return;
5565
5566         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5567         if (!hdr) {
5568                 nlmsg_free(msg);
5569                 return;
5570         }
5571
5572         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5573         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5574         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5575         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5576
5577         if (genlmsg_end(msg, hdr) < 0) {
5578                 nlmsg_free(msg);
5579                 return;
5580         }
5581
5582         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5583                                 nl80211_mlme_mcgrp.id, gfp);
5584         return;
5585
5586  nla_put_failure:
5587         genlmsg_cancel(msg, hdr);
5588         nlmsg_free(msg);
5589 }
5590
5591 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5592                                struct net_device *netdev, const u8 *addr,
5593                                gfp_t gfp)
5594 {
5595         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5596                                   addr, gfp);
5597 }
5598
5599 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5600                                 struct net_device *netdev, const u8 *addr,
5601                                 gfp_t gfp)
5602 {
5603         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5604                                   addr, gfp);
5605 }
5606
5607 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5608                                  struct net_device *netdev, const u8 *bssid,
5609                                  const u8 *req_ie, size_t req_ie_len,
5610                                  const u8 *resp_ie, size_t resp_ie_len,
5611                                  u16 status, gfp_t gfp)
5612 {
5613         struct sk_buff *msg;
5614         void *hdr;
5615
5616         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5617         if (!msg)
5618                 return;
5619
5620         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5621         if (!hdr) {
5622                 nlmsg_free(msg);
5623                 return;
5624         }
5625
5626         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5627         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5628         if (bssid)
5629                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5630         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5631         if (req_ie)
5632                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5633         if (resp_ie)
5634                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5635
5636         if (genlmsg_end(msg, hdr) < 0) {
5637                 nlmsg_free(msg);
5638                 return;
5639         }
5640
5641         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5642                                 nl80211_mlme_mcgrp.id, gfp);
5643         return;
5644
5645  nla_put_failure:
5646         genlmsg_cancel(msg, hdr);
5647         nlmsg_free(msg);
5648
5649 }
5650
5651 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5652                          struct net_device *netdev, const u8 *bssid,
5653                          const u8 *req_ie, size_t req_ie_len,
5654                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5655 {
5656         struct sk_buff *msg;
5657         void *hdr;
5658
5659         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5660         if (!msg)
5661                 return;
5662
5663         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5664         if (!hdr) {
5665                 nlmsg_free(msg);
5666                 return;
5667         }
5668
5669         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5670         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5671         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5672         if (req_ie)
5673                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5674         if (resp_ie)
5675                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5676
5677         if (genlmsg_end(msg, hdr) < 0) {
5678                 nlmsg_free(msg);
5679                 return;
5680         }
5681
5682         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5683                                 nl80211_mlme_mcgrp.id, gfp);
5684         return;
5685
5686  nla_put_failure:
5687         genlmsg_cancel(msg, hdr);
5688         nlmsg_free(msg);
5689
5690 }
5691
5692 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5693                                struct net_device *netdev, u16 reason,
5694                                const u8 *ie, size_t ie_len, bool from_ap)
5695 {
5696         struct sk_buff *msg;
5697         void *hdr;
5698
5699         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5700         if (!msg)
5701                 return;
5702
5703         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5704         if (!hdr) {
5705                 nlmsg_free(msg);
5706                 return;
5707         }
5708
5709         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5710         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5711         if (from_ap && reason)
5712                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5713         if (from_ap)
5714                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5715         if (ie)
5716                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5717
5718         if (genlmsg_end(msg, hdr) < 0) {
5719                 nlmsg_free(msg);
5720                 return;
5721         }
5722
5723         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5724                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5725         return;
5726
5727  nla_put_failure:
5728         genlmsg_cancel(msg, hdr);
5729         nlmsg_free(msg);
5730
5731 }
5732
5733 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5734                              struct net_device *netdev, const u8 *bssid,
5735                              gfp_t gfp)
5736 {
5737         struct sk_buff *msg;
5738         void *hdr;
5739
5740         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5741         if (!msg)
5742                 return;
5743
5744         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5745         if (!hdr) {
5746                 nlmsg_free(msg);
5747                 return;
5748         }
5749
5750         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5751         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5752         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5753
5754         if (genlmsg_end(msg, hdr) < 0) {
5755                 nlmsg_free(msg);
5756                 return;
5757         }
5758
5759         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5760                                 nl80211_mlme_mcgrp.id, gfp);
5761         return;
5762
5763  nla_put_failure:
5764         genlmsg_cancel(msg, hdr);
5765         nlmsg_free(msg);
5766 }
5767
5768 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5769                                  struct net_device *netdev, const u8 *addr,
5770                                  enum nl80211_key_type key_type, int key_id,
5771                                  const u8 *tsc, gfp_t gfp)
5772 {
5773         struct sk_buff *msg;
5774         void *hdr;
5775
5776         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5777         if (!msg)
5778                 return;
5779
5780         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5781         if (!hdr) {
5782                 nlmsg_free(msg);
5783                 return;
5784         }
5785
5786         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5787         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5788         if (addr)
5789                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5790         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5791         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5792         if (tsc)
5793                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5794
5795         if (genlmsg_end(msg, hdr) < 0) {
5796                 nlmsg_free(msg);
5797                 return;
5798         }
5799
5800         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5801                                 nl80211_mlme_mcgrp.id, gfp);
5802         return;
5803
5804  nla_put_failure:
5805         genlmsg_cancel(msg, hdr);
5806         nlmsg_free(msg);
5807 }
5808
5809 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5810                                     struct ieee80211_channel *channel_before,
5811                                     struct ieee80211_channel *channel_after)
5812 {
5813         struct sk_buff *msg;
5814         void *hdr;
5815         struct nlattr *nl_freq;
5816
5817         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5818         if (!msg)
5819                 return;
5820
5821         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5822         if (!hdr) {
5823                 nlmsg_free(msg);
5824                 return;
5825         }
5826
5827         /*
5828          * Since we are applying the beacon hint to a wiphy we know its
5829          * wiphy_idx is valid
5830          */
5831         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5832
5833         /* Before */
5834         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5835         if (!nl_freq)
5836                 goto nla_put_failure;
5837         if (nl80211_msg_put_channel(msg, channel_before))
5838                 goto nla_put_failure;
5839         nla_nest_end(msg, nl_freq);
5840
5841         /* After */
5842         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5843         if (!nl_freq)
5844                 goto nla_put_failure;
5845         if (nl80211_msg_put_channel(msg, channel_after))
5846                 goto nla_put_failure;
5847         nla_nest_end(msg, nl_freq);
5848
5849         if (genlmsg_end(msg, hdr) < 0) {
5850                 nlmsg_free(msg);
5851                 return;
5852         }
5853
5854         rcu_read_lock();
5855         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5856                                 GFP_ATOMIC);
5857         rcu_read_unlock();
5858
5859         return;
5860
5861 nla_put_failure:
5862         genlmsg_cancel(msg, hdr);
5863         nlmsg_free(msg);
5864 }
5865
5866 static void nl80211_send_remain_on_chan_event(
5867         int cmd, struct cfg80211_registered_device *rdev,
5868         struct net_device *netdev, u64 cookie,
5869         struct ieee80211_channel *chan,
5870         enum nl80211_channel_type channel_type,
5871         unsigned int duration, gfp_t gfp)
5872 {
5873         struct sk_buff *msg;
5874         void *hdr;
5875
5876         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5877         if (!msg)
5878                 return;
5879
5880         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5881         if (!hdr) {
5882                 nlmsg_free(msg);
5883                 return;
5884         }
5885
5886         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5887         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5888         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5889         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5890         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5891
5892         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5893                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5894
5895         if (genlmsg_end(msg, hdr) < 0) {
5896                 nlmsg_free(msg);
5897                 return;
5898         }
5899
5900         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5901                                 nl80211_mlme_mcgrp.id, gfp);
5902         return;
5903
5904  nla_put_failure:
5905         genlmsg_cancel(msg, hdr);
5906         nlmsg_free(msg);
5907 }
5908
5909 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5910                                     struct net_device *netdev, u64 cookie,
5911                                     struct ieee80211_channel *chan,
5912                                     enum nl80211_channel_type channel_type,
5913                                     unsigned int duration, gfp_t gfp)
5914 {
5915         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5916                                           rdev, netdev, cookie, chan,
5917                                           channel_type, duration, gfp);
5918 }
5919
5920 void nl80211_send_remain_on_channel_cancel(
5921         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5922         u64 cookie, struct ieee80211_channel *chan,
5923         enum nl80211_channel_type channel_type, gfp_t gfp)
5924 {
5925         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5926                                           rdev, netdev, cookie, chan,
5927                                           channel_type, 0, gfp);
5928 }
5929
5930 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5931                             struct net_device *dev, const u8 *mac_addr,
5932                             struct station_info *sinfo, gfp_t gfp)
5933 {
5934         struct sk_buff *msg;
5935
5936         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5937         if (!msg)
5938                 return;
5939
5940         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5941                 nlmsg_free(msg);
5942                 return;
5943         }
5944
5945         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5946                                 nl80211_mlme_mcgrp.id, gfp);
5947 }
5948
5949 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5950                       struct net_device *netdev, u32 nlpid,
5951                       int freq, const u8 *buf, size_t len, gfp_t gfp)
5952 {
5953         struct sk_buff *msg;
5954         void *hdr;
5955         int err;
5956
5957         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5958         if (!msg)
5959                 return -ENOMEM;
5960
5961         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5962         if (!hdr) {
5963                 nlmsg_free(msg);
5964                 return -ENOMEM;
5965         }
5966
5967         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5968         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5969         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5970         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5971
5972         err = genlmsg_end(msg, hdr);
5973         if (err < 0) {
5974                 nlmsg_free(msg);
5975                 return err;
5976         }
5977
5978         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5979         if (err < 0)
5980                 return err;
5981         return 0;
5982
5983  nla_put_failure:
5984         genlmsg_cancel(msg, hdr);
5985         nlmsg_free(msg);
5986         return -ENOBUFS;
5987 }
5988
5989 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
5990                                  struct net_device *netdev, u64 cookie,
5991                                  const u8 *buf, size_t len, bool ack,
5992                                  gfp_t gfp)
5993 {
5994         struct sk_buff *msg;
5995         void *hdr;
5996
5997         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5998         if (!msg)
5999                 return;
6000
6001         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6002         if (!hdr) {
6003                 nlmsg_free(msg);
6004                 return;
6005         }
6006
6007         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6008         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6009         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6010         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6011         if (ack)
6012                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6013
6014         if (genlmsg_end(msg, hdr) < 0) {
6015                 nlmsg_free(msg);
6016                 return;
6017         }
6018
6019         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6020         return;
6021
6022  nla_put_failure:
6023         genlmsg_cancel(msg, hdr);
6024         nlmsg_free(msg);
6025 }
6026
6027 void
6028 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6029                              struct net_device *netdev,
6030                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6031                              gfp_t gfp)
6032 {
6033         struct sk_buff *msg;
6034         struct nlattr *pinfoattr;
6035         void *hdr;
6036
6037         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6038         if (!msg)
6039                 return;
6040
6041         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6042         if (!hdr) {
6043                 nlmsg_free(msg);
6044                 return;
6045         }
6046
6047         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6048         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6049
6050         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6051         if (!pinfoattr)
6052                 goto nla_put_failure;
6053
6054         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6055                     rssi_event);
6056
6057         nla_nest_end(msg, pinfoattr);
6058
6059         if (genlmsg_end(msg, hdr) < 0) {
6060                 nlmsg_free(msg);
6061                 return;
6062         }
6063
6064         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6065                                 nl80211_mlme_mcgrp.id, gfp);
6066         return;
6067
6068  nla_put_failure:
6069         genlmsg_cancel(msg, hdr);
6070         nlmsg_free(msg);
6071 }
6072
6073 void
6074 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
6075                                 struct net_device *netdev, const u8 *peer,
6076                                 u32 num_packets, gfp_t gfp)
6077 {
6078         struct sk_buff *msg;
6079         struct nlattr *pinfoattr;
6080         void *hdr;
6081
6082         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6083         if (!msg)
6084                 return;
6085
6086         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6087         if (!hdr) {
6088                 nlmsg_free(msg);
6089                 return;
6090         }
6091
6092         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6093         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6094         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6095
6096         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6097         if (!pinfoattr)
6098                 goto nla_put_failure;
6099
6100         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6101
6102         nla_nest_end(msg, pinfoattr);
6103
6104         if (genlmsg_end(msg, hdr) < 0) {
6105                 nlmsg_free(msg);
6106                 return;
6107         }
6108
6109         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6110                                 nl80211_mlme_mcgrp.id, gfp);
6111         return;
6112
6113  nla_put_failure:
6114         genlmsg_cancel(msg, hdr);
6115         nlmsg_free(msg);
6116 }
6117
6118 static int nl80211_netlink_notify(struct notifier_block * nb,
6119                                   unsigned long state,
6120                                   void *_notify)
6121 {
6122         struct netlink_notify *notify = _notify;
6123         struct cfg80211_registered_device *rdev;
6124         struct wireless_dev *wdev;
6125
6126         if (state != NETLINK_URELEASE)
6127                 return NOTIFY_DONE;
6128
6129         rcu_read_lock();
6130
6131         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6132                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6133                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6134
6135         rcu_read_unlock();
6136
6137         return NOTIFY_DONE;
6138 }
6139
6140 static struct notifier_block nl80211_netlink_notifier = {
6141         .notifier_call = nl80211_netlink_notify,
6142 };
6143
6144 /* initialisation/exit functions */
6145
6146 int nl80211_init(void)
6147 {
6148         int err;
6149
6150         err = genl_register_family_with_ops(&nl80211_fam,
6151                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6152         if (err)
6153                 return err;
6154
6155         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6156         if (err)
6157                 goto err_out;
6158
6159         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6160         if (err)
6161                 goto err_out;
6162
6163         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6164         if (err)
6165                 goto err_out;
6166
6167         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6168         if (err)
6169                 goto err_out;
6170
6171 #ifdef CONFIG_NL80211_TESTMODE
6172         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6173         if (err)
6174                 goto err_out;
6175 #endif
6176
6177         err = netlink_register_notifier(&nl80211_netlink_notifier);
6178         if (err)
6179                 goto err_out;
6180
6181         return 0;
6182  err_out:
6183         genl_unregister_family(&nl80211_fam);
6184         return err;
6185 }
6186
6187 void nl80211_exit(void)
6188 {
6189         netlink_unregister_notifier(&nl80211_netlink_notifier);
6190         genl_unregister_family(&nl80211_fam);
6191 }