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 bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
1972                                  int attr)
1973 {
1974         struct nlattr *rate;
1975         u16 bitrate;
1976
1977         rate = nla_nest_start(msg, attr);
1978         if (!rate)
1979                 goto nla_put_failure;
1980
1981         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1982         bitrate = cfg80211_calculate_bitrate(info);
1983         if (bitrate > 0)
1984                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1985
1986         if (info->flags & RATE_INFO_FLAGS_MCS)
1987                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
1988         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1989                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1990         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
1991                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1992
1993         nla_nest_end(msg, rate);
1994         return true;
1995
1996 nla_put_failure:
1997         return false;
1998 }
1999
2000 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2001                                 int flags, struct net_device *dev,
2002                                 const u8 *mac_addr, struct station_info *sinfo)
2003 {
2004         void *hdr;
2005         struct nlattr *sinfoattr;
2006
2007         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2008         if (!hdr)
2009                 return -1;
2010
2011         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2012         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2013
2014         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2015
2016         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2017         if (!sinfoattr)
2018                 goto nla_put_failure;
2019         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2020                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2021                             sinfo->inactive_time);
2022         if (sinfo->filled & STATION_INFO_RX_BYTES)
2023                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2024                             sinfo->rx_bytes);
2025         if (sinfo->filled & STATION_INFO_TX_BYTES)
2026                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2027                             sinfo->tx_bytes);
2028         if (sinfo->filled & STATION_INFO_LLID)
2029                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2030                             sinfo->llid);
2031         if (sinfo->filled & STATION_INFO_PLID)
2032                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2033                             sinfo->plid);
2034         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2035                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2036                             sinfo->plink_state);
2037         if (sinfo->filled & STATION_INFO_SIGNAL)
2038                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2039                            sinfo->signal);
2040         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2041                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2042                            sinfo->signal_avg);
2043         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2044                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2045                                           NL80211_STA_INFO_TX_BITRATE))
2046                         goto nla_put_failure;
2047         }
2048         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2049                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2050                                           NL80211_STA_INFO_RX_BITRATE))
2051                         goto nla_put_failure;
2052         }
2053         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2054                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2055                             sinfo->rx_packets);
2056         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2057                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2058                             sinfo->tx_packets);
2059         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2060                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2061                             sinfo->tx_retries);
2062         if (sinfo->filled & STATION_INFO_TX_FAILED)
2063                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2064                             sinfo->tx_failed);
2065         nla_nest_end(msg, sinfoattr);
2066
2067         return genlmsg_end(msg, hdr);
2068
2069  nla_put_failure:
2070         genlmsg_cancel(msg, hdr);
2071         return -EMSGSIZE;
2072 }
2073
2074 static int nl80211_dump_station(struct sk_buff *skb,
2075                                 struct netlink_callback *cb)
2076 {
2077         struct station_info sinfo;
2078         struct cfg80211_registered_device *dev;
2079         struct net_device *netdev;
2080         u8 mac_addr[ETH_ALEN];
2081         int sta_idx = cb->args[1];
2082         int err;
2083
2084         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2085         if (err)
2086                 return err;
2087
2088         if (!dev->ops->dump_station) {
2089                 err = -EOPNOTSUPP;
2090                 goto out_err;
2091         }
2092
2093         while (1) {
2094                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2095                                              mac_addr, &sinfo);
2096                 if (err == -ENOENT)
2097                         break;
2098                 if (err)
2099                         goto out_err;
2100
2101                 if (nl80211_send_station(skb,
2102                                 NETLINK_CB(cb->skb).pid,
2103                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2104                                 netdev, mac_addr,
2105                                 &sinfo) < 0)
2106                         goto out;
2107
2108                 sta_idx++;
2109         }
2110
2111
2112  out:
2113         cb->args[1] = sta_idx;
2114         err = skb->len;
2115  out_err:
2116         nl80211_finish_netdev_dump(dev);
2117
2118         return err;
2119 }
2120
2121 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2122 {
2123         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2124         struct net_device *dev = info->user_ptr[1];
2125         struct station_info sinfo;
2126         struct sk_buff *msg;
2127         u8 *mac_addr = NULL;
2128         int err;
2129
2130         memset(&sinfo, 0, sizeof(sinfo));
2131
2132         if (!info->attrs[NL80211_ATTR_MAC])
2133                 return -EINVAL;
2134
2135         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2136
2137         if (!rdev->ops->get_station)
2138                 return -EOPNOTSUPP;
2139
2140         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2141         if (err)
2142                 return err;
2143
2144         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2145         if (!msg)
2146                 return -ENOMEM;
2147
2148         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2149                                  dev, mac_addr, &sinfo) < 0) {
2150                 nlmsg_free(msg);
2151                 return -ENOBUFS;
2152         }
2153
2154         return genlmsg_reply(msg, info);
2155 }
2156
2157 /*
2158  * Get vlan interface making sure it is running and on the right wiphy.
2159  */
2160 static int get_vlan(struct genl_info *info,
2161                     struct cfg80211_registered_device *rdev,
2162                     struct net_device **vlan)
2163 {
2164         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2165         *vlan = NULL;
2166
2167         if (vlanattr) {
2168                 *vlan = dev_get_by_index(genl_info_net(info),
2169                                          nla_get_u32(vlanattr));
2170                 if (!*vlan)
2171                         return -ENODEV;
2172                 if (!(*vlan)->ieee80211_ptr)
2173                         return -EINVAL;
2174                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2175                         return -EINVAL;
2176                 if (!netif_running(*vlan))
2177                         return -ENETDOWN;
2178         }
2179         return 0;
2180 }
2181
2182 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2183 {
2184         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2185         int err;
2186         struct net_device *dev = info->user_ptr[1];
2187         struct station_parameters params;
2188         u8 *mac_addr = NULL;
2189
2190         memset(&params, 0, sizeof(params));
2191
2192         params.listen_interval = -1;
2193
2194         if (info->attrs[NL80211_ATTR_STA_AID])
2195                 return -EINVAL;
2196
2197         if (!info->attrs[NL80211_ATTR_MAC])
2198                 return -EINVAL;
2199
2200         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2201
2202         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2203                 params.supported_rates =
2204                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2205                 params.supported_rates_len =
2206                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2207         }
2208
2209         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2210                 params.listen_interval =
2211                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2212
2213         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2214                 params.ht_capa =
2215                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2216
2217         if (parse_station_flags(info, &params))
2218                 return -EINVAL;
2219
2220         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2221                 params.plink_action =
2222                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2223
2224         err = get_vlan(info, rdev, &params.vlan);
2225         if (err)
2226                 goto out;
2227
2228         /* validate settings */
2229         err = 0;
2230
2231         switch (dev->ieee80211_ptr->iftype) {
2232         case NL80211_IFTYPE_AP:
2233         case NL80211_IFTYPE_AP_VLAN:
2234         case NL80211_IFTYPE_P2P_GO:
2235                 /* disallow mesh-specific things */
2236                 if (params.plink_action)
2237                         err = -EINVAL;
2238                 break;
2239         case NL80211_IFTYPE_P2P_CLIENT:
2240         case NL80211_IFTYPE_STATION:
2241                 /* disallow everything but AUTHORIZED flag */
2242                 if (params.plink_action)
2243                         err = -EINVAL;
2244                 if (params.vlan)
2245                         err = -EINVAL;
2246                 if (params.supported_rates)
2247                         err = -EINVAL;
2248                 if (params.ht_capa)
2249                         err = -EINVAL;
2250                 if (params.listen_interval >= 0)
2251                         err = -EINVAL;
2252                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2253                         err = -EINVAL;
2254                 break;
2255         case NL80211_IFTYPE_MESH_POINT:
2256                 /* disallow things mesh doesn't support */
2257                 if (params.vlan)
2258                         err = -EINVAL;
2259                 if (params.ht_capa)
2260                         err = -EINVAL;
2261                 if (params.listen_interval >= 0)
2262                         err = -EINVAL;
2263                 if (params.supported_rates)
2264                         err = -EINVAL;
2265                 if (params.sta_flags_mask)
2266                         err = -EINVAL;
2267                 break;
2268         default:
2269                 err = -EINVAL;
2270         }
2271
2272         if (err)
2273                 goto out;
2274
2275         if (!rdev->ops->change_station) {
2276                 err = -EOPNOTSUPP;
2277                 goto out;
2278         }
2279
2280         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2281
2282  out:
2283         if (params.vlan)
2284                 dev_put(params.vlan);
2285
2286         return err;
2287 }
2288
2289 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2290 {
2291         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2292         int err;
2293         struct net_device *dev = info->user_ptr[1];
2294         struct station_parameters params;
2295         u8 *mac_addr = NULL;
2296
2297         memset(&params, 0, sizeof(params));
2298
2299         if (!info->attrs[NL80211_ATTR_MAC])
2300                 return -EINVAL;
2301
2302         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2303                 return -EINVAL;
2304
2305         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2306                 return -EINVAL;
2307
2308         if (!info->attrs[NL80211_ATTR_STA_AID])
2309                 return -EINVAL;
2310
2311         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2312         params.supported_rates =
2313                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2314         params.supported_rates_len =
2315                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2316         params.listen_interval =
2317                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2318
2319         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2320         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2321                 return -EINVAL;
2322
2323         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2324                 params.ht_capa =
2325                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2326
2327         if (parse_station_flags(info, &params))
2328                 return -EINVAL;
2329
2330         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2331             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2332             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2333                 return -EINVAL;
2334
2335         err = get_vlan(info, rdev, &params.vlan);
2336         if (err)
2337                 goto out;
2338
2339         /* validate settings */
2340         err = 0;
2341
2342         if (!rdev->ops->add_station) {
2343                 err = -EOPNOTSUPP;
2344                 goto out;
2345         }
2346
2347         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2348
2349  out:
2350         if (params.vlan)
2351                 dev_put(params.vlan);
2352         return err;
2353 }
2354
2355 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2356 {
2357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2358         struct net_device *dev = info->user_ptr[1];
2359         u8 *mac_addr = NULL;
2360
2361         if (info->attrs[NL80211_ATTR_MAC])
2362                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2363
2364         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2365             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2366             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2367             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2368                 return -EINVAL;
2369
2370         if (!rdev->ops->del_station)
2371                 return -EOPNOTSUPP;
2372
2373         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2374 }
2375
2376 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2377                                 int flags, struct net_device *dev,
2378                                 u8 *dst, u8 *next_hop,
2379                                 struct mpath_info *pinfo)
2380 {
2381         void *hdr;
2382         struct nlattr *pinfoattr;
2383
2384         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2385         if (!hdr)
2386                 return -1;
2387
2388         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2389         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2390         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2391
2392         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2393
2394         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2395         if (!pinfoattr)
2396                 goto nla_put_failure;
2397         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2398                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2399                             pinfo->frame_qlen);
2400         if (pinfo->filled & MPATH_INFO_SN)
2401                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2402                             pinfo->sn);
2403         if (pinfo->filled & MPATH_INFO_METRIC)
2404                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2405                             pinfo->metric);
2406         if (pinfo->filled & MPATH_INFO_EXPTIME)
2407                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2408                             pinfo->exptime);
2409         if (pinfo->filled & MPATH_INFO_FLAGS)
2410                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2411                             pinfo->flags);
2412         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2413                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2414                             pinfo->discovery_timeout);
2415         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2416                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2417                             pinfo->discovery_retries);
2418
2419         nla_nest_end(msg, pinfoattr);
2420
2421         return genlmsg_end(msg, hdr);
2422
2423  nla_put_failure:
2424         genlmsg_cancel(msg, hdr);
2425         return -EMSGSIZE;
2426 }
2427
2428 static int nl80211_dump_mpath(struct sk_buff *skb,
2429                               struct netlink_callback *cb)
2430 {
2431         struct mpath_info pinfo;
2432         struct cfg80211_registered_device *dev;
2433         struct net_device *netdev;
2434         u8 dst[ETH_ALEN];
2435         u8 next_hop[ETH_ALEN];
2436         int path_idx = cb->args[1];
2437         int err;
2438
2439         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2440         if (err)
2441                 return err;
2442
2443         if (!dev->ops->dump_mpath) {
2444                 err = -EOPNOTSUPP;
2445                 goto out_err;
2446         }
2447
2448         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2449                 err = -EOPNOTSUPP;
2450                 goto out_err;
2451         }
2452
2453         while (1) {
2454                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2455                                            dst, next_hop, &pinfo);
2456                 if (err == -ENOENT)
2457                         break;
2458                 if (err)
2459                         goto out_err;
2460
2461                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2462                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2463                                        netdev, dst, next_hop,
2464                                        &pinfo) < 0)
2465                         goto out;
2466
2467                 path_idx++;
2468         }
2469
2470
2471  out:
2472         cb->args[1] = path_idx;
2473         err = skb->len;
2474  out_err:
2475         nl80211_finish_netdev_dump(dev);
2476         return err;
2477 }
2478
2479 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2480 {
2481         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2482         int err;
2483         struct net_device *dev = info->user_ptr[1];
2484         struct mpath_info pinfo;
2485         struct sk_buff *msg;
2486         u8 *dst = NULL;
2487         u8 next_hop[ETH_ALEN];
2488
2489         memset(&pinfo, 0, sizeof(pinfo));
2490
2491         if (!info->attrs[NL80211_ATTR_MAC])
2492                 return -EINVAL;
2493
2494         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2495
2496         if (!rdev->ops->get_mpath)
2497                 return -EOPNOTSUPP;
2498
2499         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2500                 return -EOPNOTSUPP;
2501
2502         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2503         if (err)
2504                 return err;
2505
2506         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2507         if (!msg)
2508                 return -ENOMEM;
2509
2510         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2511                                  dev, dst, next_hop, &pinfo) < 0) {
2512                 nlmsg_free(msg);
2513                 return -ENOBUFS;
2514         }
2515
2516         return genlmsg_reply(msg, info);
2517 }
2518
2519 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2520 {
2521         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2522         struct net_device *dev = info->user_ptr[1];
2523         u8 *dst = NULL;
2524         u8 *next_hop = NULL;
2525
2526         if (!info->attrs[NL80211_ATTR_MAC])
2527                 return -EINVAL;
2528
2529         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2530                 return -EINVAL;
2531
2532         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2533         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2534
2535         if (!rdev->ops->change_mpath)
2536                 return -EOPNOTSUPP;
2537
2538         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2539                 return -EOPNOTSUPP;
2540
2541         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2542 }
2543
2544 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2545 {
2546         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2547         struct net_device *dev = info->user_ptr[1];
2548         u8 *dst = NULL;
2549         u8 *next_hop = NULL;
2550
2551         if (!info->attrs[NL80211_ATTR_MAC])
2552                 return -EINVAL;
2553
2554         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2555                 return -EINVAL;
2556
2557         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2558         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2559
2560         if (!rdev->ops->add_mpath)
2561                 return -EOPNOTSUPP;
2562
2563         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2564                 return -EOPNOTSUPP;
2565
2566         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2567 }
2568
2569 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2570 {
2571         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2572         struct net_device *dev = info->user_ptr[1];
2573         u8 *dst = NULL;
2574
2575         if (info->attrs[NL80211_ATTR_MAC])
2576                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2577
2578         if (!rdev->ops->del_mpath)
2579                 return -EOPNOTSUPP;
2580
2581         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2582 }
2583
2584 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2585 {
2586         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2587         struct net_device *dev = info->user_ptr[1];
2588         struct bss_parameters params;
2589
2590         memset(&params, 0, sizeof(params));
2591         /* default to not changing parameters */
2592         params.use_cts_prot = -1;
2593         params.use_short_preamble = -1;
2594         params.use_short_slot_time = -1;
2595         params.ap_isolate = -1;
2596         params.ht_opmode = -1;
2597
2598         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2599                 params.use_cts_prot =
2600                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2601         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2602                 params.use_short_preamble =
2603                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2604         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2605                 params.use_short_slot_time =
2606                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2607         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2608                 params.basic_rates =
2609                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2610                 params.basic_rates_len =
2611                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2612         }
2613         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2614                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2615         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2616                 params.ht_opmode =
2617                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2618
2619         if (!rdev->ops->change_bss)
2620                 return -EOPNOTSUPP;
2621
2622         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2623             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2624                 return -EOPNOTSUPP;
2625
2626         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2627 }
2628
2629 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2630         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2631         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2632         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2633         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2634         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2635         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2636 };
2637
2638 static int parse_reg_rule(struct nlattr *tb[],
2639         struct ieee80211_reg_rule *reg_rule)
2640 {
2641         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2642         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2643
2644         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2645                 return -EINVAL;
2646         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2647                 return -EINVAL;
2648         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2649                 return -EINVAL;
2650         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2651                 return -EINVAL;
2652         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2653                 return -EINVAL;
2654
2655         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2656
2657         freq_range->start_freq_khz =
2658                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2659         freq_range->end_freq_khz =
2660                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2661         freq_range->max_bandwidth_khz =
2662                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2663
2664         power_rule->max_eirp =
2665                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2666
2667         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2668                 power_rule->max_antenna_gain =
2669                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2670
2671         return 0;
2672 }
2673
2674 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2675 {
2676         int r;
2677         char *data = NULL;
2678
2679         /*
2680          * You should only get this when cfg80211 hasn't yet initialized
2681          * completely when built-in to the kernel right between the time
2682          * window between nl80211_init() and regulatory_init(), if that is
2683          * even possible.
2684          */
2685         mutex_lock(&cfg80211_mutex);
2686         if (unlikely(!cfg80211_regdomain)) {
2687                 mutex_unlock(&cfg80211_mutex);
2688                 return -EINPROGRESS;
2689         }
2690         mutex_unlock(&cfg80211_mutex);
2691
2692         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2693                 return -EINVAL;
2694
2695         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2696
2697         r = regulatory_hint_user(data);
2698
2699         return r;
2700 }
2701
2702 static int nl80211_get_mesh_config(struct sk_buff *skb,
2703                                    struct genl_info *info)
2704 {
2705         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2706         struct net_device *dev = info->user_ptr[1];
2707         struct wireless_dev *wdev = dev->ieee80211_ptr;
2708         struct mesh_config cur_params;
2709         int err = 0;
2710         void *hdr;
2711         struct nlattr *pinfoattr;
2712         struct sk_buff *msg;
2713
2714         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2715                 return -EOPNOTSUPP;
2716
2717         if (!rdev->ops->get_mesh_config)
2718                 return -EOPNOTSUPP;
2719
2720         wdev_lock(wdev);
2721         /* If not connected, get default parameters */
2722         if (!wdev->mesh_id_len)
2723                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2724         else
2725                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
2726                                                  &cur_params);
2727         wdev_unlock(wdev);
2728
2729         if (err)
2730                 return err;
2731
2732         /* Draw up a netlink message to send back */
2733         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2734         if (!msg)
2735                 return -ENOMEM;
2736         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2737                              NL80211_CMD_GET_MESH_CONFIG);
2738         if (!hdr)
2739                 goto out;
2740         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
2741         if (!pinfoattr)
2742                 goto nla_put_failure;
2743         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2744         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2745                         cur_params.dot11MeshRetryTimeout);
2746         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2747                         cur_params.dot11MeshConfirmTimeout);
2748         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2749                         cur_params.dot11MeshHoldingTimeout);
2750         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2751                         cur_params.dot11MeshMaxPeerLinks);
2752         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2753                         cur_params.dot11MeshMaxRetries);
2754         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2755                         cur_params.dot11MeshTTL);
2756         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2757                         cur_params.element_ttl);
2758         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2759                         cur_params.auto_open_plinks);
2760         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2761                         cur_params.dot11MeshHWMPmaxPREQretries);
2762         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2763                         cur_params.path_refresh_time);
2764         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2765                         cur_params.min_discovery_timeout);
2766         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2767                         cur_params.dot11MeshHWMPactivePathTimeout);
2768         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2769                         cur_params.dot11MeshHWMPpreqMinInterval);
2770         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2771                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2772         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2773                         cur_params.dot11MeshHWMPRootMode);
2774         nla_nest_end(msg, pinfoattr);
2775         genlmsg_end(msg, hdr);
2776         return genlmsg_reply(msg, info);
2777
2778  nla_put_failure:
2779         genlmsg_cancel(msg, hdr);
2780  out:
2781         nlmsg_free(msg);
2782         return -ENOBUFS;
2783 }
2784
2785 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2786         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2787         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2788         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2789         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2790         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2791         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2792         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2793         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2794
2795         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2796         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2797         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2798         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2799         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2800         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2801 };
2802
2803 static const struct nla_policy
2804         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
2805         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
2806         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
2807         [NL80211_MESH_SETUP_VENDOR_PATH_SEL_IE] = { .type = NLA_BINARY,
2808                 .len = IEEE80211_MAX_DATA_LEN },
2809 };
2810
2811 static int nl80211_parse_mesh_config(struct genl_info *info,
2812                                      struct mesh_config *cfg,
2813                                      u32 *mask_out)
2814 {
2815         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2816         u32 mask = 0;
2817
2818 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2819 do {\
2820         if (table[attr_num]) {\
2821                 cfg->param = nla_fn(table[attr_num]); \
2822                 mask |= (1 << (attr_num - 1)); \
2823         } \
2824 } while (0);\
2825
2826
2827         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
2828                 return -EINVAL;
2829         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2830                              info->attrs[NL80211_ATTR_MESH_CONFIG],
2831                              nl80211_meshconf_params_policy))
2832                 return -EINVAL;
2833
2834         /* This makes sure that there aren't more than 32 mesh config
2835          * parameters (otherwise our bitfield scheme would not work.) */
2836         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2837
2838         /* Fill in the params struct */
2839         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2840                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2841         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2842                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2843         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2844                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2845         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2846                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2847         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2848                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2849         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2850                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2851         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
2852                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
2853         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2854                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2855         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2856                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2857                         nla_get_u8);
2858         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2859                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2860         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2861                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2862                         nla_get_u16);
2863         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2864                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2865                         nla_get_u32);
2866         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2867                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2868                         nla_get_u16);
2869         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2870                         dot11MeshHWMPnetDiameterTraversalTime,
2871                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2872                         nla_get_u16);
2873         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2874                         dot11MeshHWMPRootMode, mask,
2875                         NL80211_MESHCONF_HWMP_ROOTMODE,
2876                         nla_get_u8);
2877         if (mask_out)
2878                 *mask_out = mask;
2879
2880         return 0;
2881
2882 #undef FILL_IN_MESH_PARAM_IF_SET
2883 }
2884
2885 static int nl80211_parse_mesh_setup(struct genl_info *info,
2886                                      struct mesh_setup *setup)
2887 {
2888         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
2889
2890         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
2891                 return -EINVAL;
2892         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
2893                              info->attrs[NL80211_ATTR_MESH_SETUP],
2894                              nl80211_mesh_setup_params_policy))
2895                 return -EINVAL;
2896
2897         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
2898                 setup->path_sel_proto =
2899                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
2900                  IEEE80211_PATH_PROTOCOL_VENDOR :
2901                  IEEE80211_PATH_PROTOCOL_HWMP;
2902
2903         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
2904                 setup->path_metric =
2905                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
2906                  IEEE80211_PATH_METRIC_VENDOR :
2907                  IEEE80211_PATH_METRIC_AIRTIME;
2908
2909         if (tb[NL80211_MESH_SETUP_VENDOR_PATH_SEL_IE]) {
2910                 struct nlattr *ieattr =
2911                         tb[NL80211_MESH_SETUP_VENDOR_PATH_SEL_IE];
2912                 if (!is_valid_ie_attr(ieattr))
2913                         return -EINVAL;
2914                 setup->vendor_ie = nla_data(ieattr);
2915                 setup->vendor_ie_len = nla_len(ieattr);
2916         }
2917
2918         return 0;
2919 }
2920
2921 static int nl80211_update_mesh_config(struct sk_buff *skb,
2922                                       struct genl_info *info)
2923 {
2924         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2925         struct net_device *dev = info->user_ptr[1];
2926         struct wireless_dev *wdev = dev->ieee80211_ptr;
2927         struct mesh_config cfg;
2928         u32 mask;
2929         int err;
2930
2931         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2932                 return -EOPNOTSUPP;
2933
2934         if (!rdev->ops->update_mesh_config)
2935                 return -EOPNOTSUPP;
2936
2937         err = nl80211_parse_mesh_config(info, &cfg, &mask);
2938         if (err)
2939                 return err;
2940
2941         wdev_lock(wdev);
2942         if (!wdev->mesh_id_len)
2943                 err = -ENOLINK;
2944
2945         if (!err)
2946                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
2947                                                     mask, &cfg);
2948
2949         wdev_unlock(wdev);
2950
2951         return err;
2952 }
2953
2954 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2955 {
2956         struct sk_buff *msg;
2957         void *hdr = NULL;
2958         struct nlattr *nl_reg_rules;
2959         unsigned int i;
2960         int err = -EINVAL;
2961
2962         mutex_lock(&cfg80211_mutex);
2963
2964         if (!cfg80211_regdomain)
2965                 goto out;
2966
2967         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2968         if (!msg) {
2969                 err = -ENOBUFS;
2970                 goto out;
2971         }
2972
2973         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2974                              NL80211_CMD_GET_REG);
2975         if (!hdr)
2976                 goto put_failure;
2977
2978         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2979                 cfg80211_regdomain->alpha2);
2980
2981         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2982         if (!nl_reg_rules)
2983                 goto nla_put_failure;
2984
2985         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2986                 struct nlattr *nl_reg_rule;
2987                 const struct ieee80211_reg_rule *reg_rule;
2988                 const struct ieee80211_freq_range *freq_range;
2989                 const struct ieee80211_power_rule *power_rule;
2990
2991                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2992                 freq_range = &reg_rule->freq_range;
2993                 power_rule = &reg_rule->power_rule;
2994
2995                 nl_reg_rule = nla_nest_start(msg, i);
2996                 if (!nl_reg_rule)
2997                         goto nla_put_failure;
2998
2999                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3000                         reg_rule->flags);
3001                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3002                         freq_range->start_freq_khz);
3003                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3004                         freq_range->end_freq_khz);
3005                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3006                         freq_range->max_bandwidth_khz);
3007                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3008                         power_rule->max_antenna_gain);
3009                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3010                         power_rule->max_eirp);
3011
3012                 nla_nest_end(msg, nl_reg_rule);
3013         }
3014
3015         nla_nest_end(msg, nl_reg_rules);
3016
3017         genlmsg_end(msg, hdr);
3018         err = genlmsg_reply(msg, info);
3019         goto out;
3020
3021 nla_put_failure:
3022         genlmsg_cancel(msg, hdr);
3023 put_failure:
3024         nlmsg_free(msg);
3025         err = -EMSGSIZE;
3026 out:
3027         mutex_unlock(&cfg80211_mutex);
3028         return err;
3029 }
3030
3031 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3032 {
3033         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3034         struct nlattr *nl_reg_rule;
3035         char *alpha2 = NULL;
3036         int rem_reg_rules = 0, r = 0;
3037         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3038         struct ieee80211_regdomain *rd = NULL;
3039
3040         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3041                 return -EINVAL;
3042
3043         if (!info->attrs[NL80211_ATTR_REG_RULES])
3044                 return -EINVAL;
3045
3046         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3047
3048         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3049                         rem_reg_rules) {
3050                 num_rules++;
3051                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3052                         return -EINVAL;
3053         }
3054
3055         mutex_lock(&cfg80211_mutex);
3056
3057         if (!reg_is_valid_request(alpha2)) {
3058                 r = -EINVAL;
3059                 goto bad_reg;
3060         }
3061
3062         size_of_regd = sizeof(struct ieee80211_regdomain) +
3063                 (num_rules * sizeof(struct ieee80211_reg_rule));
3064
3065         rd = kzalloc(size_of_regd, GFP_KERNEL);
3066         if (!rd) {
3067                 r = -ENOMEM;
3068                 goto bad_reg;
3069         }
3070
3071         rd->n_reg_rules = num_rules;
3072         rd->alpha2[0] = alpha2[0];
3073         rd->alpha2[1] = alpha2[1];
3074
3075         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3076                         rem_reg_rules) {
3077                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3078                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3079                         reg_rule_policy);
3080                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3081                 if (r)
3082                         goto bad_reg;
3083
3084                 rule_idx++;
3085
3086                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3087                         r = -EINVAL;
3088                         goto bad_reg;
3089                 }
3090         }
3091
3092         BUG_ON(rule_idx != num_rules);
3093
3094         r = set_regdom(rd);
3095
3096         mutex_unlock(&cfg80211_mutex);
3097
3098         return r;
3099
3100  bad_reg:
3101         mutex_unlock(&cfg80211_mutex);
3102         kfree(rd);
3103         return r;
3104 }
3105
3106 static int validate_scan_freqs(struct nlattr *freqs)
3107 {
3108         struct nlattr *attr1, *attr2;
3109         int n_channels = 0, tmp1, tmp2;
3110
3111         nla_for_each_nested(attr1, freqs, tmp1) {
3112                 n_channels++;
3113                 /*
3114                  * Some hardware has a limited channel list for
3115                  * scanning, and it is pretty much nonsensical
3116                  * to scan for a channel twice, so disallow that
3117                  * and don't require drivers to check that the
3118                  * channel list they get isn't longer than what
3119                  * they can scan, as long as they can scan all
3120                  * the channels they registered at once.
3121                  */
3122                 nla_for_each_nested(attr2, freqs, tmp2)
3123                         if (attr1 != attr2 &&
3124                             nla_get_u32(attr1) == nla_get_u32(attr2))
3125                                 return 0;
3126         }
3127
3128         return n_channels;
3129 }
3130
3131 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3132 {
3133         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3134         struct net_device *dev = info->user_ptr[1];
3135         struct cfg80211_scan_request *request;
3136         struct cfg80211_ssid *ssid;
3137         struct ieee80211_channel *channel;
3138         struct nlattr *attr;
3139         struct wiphy *wiphy;
3140         int err, tmp, n_ssids = 0, n_channels, i;
3141         enum ieee80211_band band;
3142         size_t ie_len;
3143
3144         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3145                 return -EINVAL;
3146
3147         wiphy = &rdev->wiphy;
3148
3149         if (!rdev->ops->scan)
3150                 return -EOPNOTSUPP;
3151
3152         if (rdev->scan_req)
3153                 return -EBUSY;
3154
3155         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3156                 n_channels = validate_scan_freqs(
3157                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3158                 if (!n_channels)
3159                         return -EINVAL;
3160         } else {
3161                 n_channels = 0;
3162
3163                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3164                         if (wiphy->bands[band])
3165                                 n_channels += wiphy->bands[band]->n_channels;
3166         }
3167
3168         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3169                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3170                         n_ssids++;
3171
3172         if (n_ssids > wiphy->max_scan_ssids)
3173                 return -EINVAL;
3174
3175         if (info->attrs[NL80211_ATTR_IE])
3176                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3177         else
3178                 ie_len = 0;
3179
3180         if (ie_len > wiphy->max_scan_ie_len)
3181                 return -EINVAL;
3182
3183         request = kzalloc(sizeof(*request)
3184                         + sizeof(*ssid) * n_ssids
3185                         + sizeof(channel) * n_channels
3186                         + ie_len, GFP_KERNEL);
3187         if (!request)
3188                 return -ENOMEM;
3189
3190         if (n_ssids)
3191                 request->ssids = (void *)&request->channels[n_channels];
3192         request->n_ssids = n_ssids;
3193         if (ie_len) {
3194                 if (request->ssids)
3195                         request->ie = (void *)(request->ssids + n_ssids);
3196                 else
3197                         request->ie = (void *)(request->channels + n_channels);
3198         }
3199
3200         i = 0;
3201         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3202                 /* user specified, bail out if channel not found */
3203                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3204                         struct ieee80211_channel *chan;
3205
3206                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3207
3208                         if (!chan) {
3209                                 err = -EINVAL;
3210                                 goto out_free;
3211                         }
3212
3213                         /* ignore disabled channels */
3214                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3215                                 continue;
3216
3217                         request->channels[i] = chan;
3218                         i++;
3219                 }
3220         } else {
3221                 /* all channels */
3222                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3223                         int j;
3224                         if (!wiphy->bands[band])
3225                                 continue;
3226                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3227                                 struct ieee80211_channel *chan;
3228
3229                                 chan = &wiphy->bands[band]->channels[j];
3230
3231                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3232                                         continue;
3233
3234                                 request->channels[i] = chan;
3235                                 i++;
3236                         }
3237                 }
3238         }
3239
3240         if (!i) {
3241                 err = -EINVAL;
3242                 goto out_free;
3243         }
3244
3245         request->n_channels = i;
3246
3247         i = 0;
3248         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3249                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3250                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3251                                 err = -EINVAL;
3252                                 goto out_free;
3253                         }
3254                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3255                         request->ssids[i].ssid_len = nla_len(attr);
3256                         i++;
3257                 }
3258         }
3259
3260         if (info->attrs[NL80211_ATTR_IE]) {
3261                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3262                 memcpy((void *)request->ie,
3263                        nla_data(info->attrs[NL80211_ATTR_IE]),
3264                        request->ie_len);
3265         }
3266
3267         request->dev = dev;
3268         request->wiphy = &rdev->wiphy;
3269
3270         rdev->scan_req = request;
3271         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3272
3273         if (!err) {
3274                 nl80211_send_scan_start(rdev, dev);
3275                 dev_hold(dev);
3276         } else {
3277  out_free:
3278                 rdev->scan_req = NULL;
3279                 kfree(request);
3280         }
3281
3282         return err;
3283 }
3284
3285 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3286                             struct cfg80211_registered_device *rdev,
3287                             struct wireless_dev *wdev,
3288                             struct cfg80211_internal_bss *intbss)
3289 {
3290         struct cfg80211_bss *res = &intbss->pub;
3291         void *hdr;
3292         struct nlattr *bss;
3293         int i;
3294
3295         ASSERT_WDEV_LOCK(wdev);
3296
3297         hdr = nl80211hdr_put(msg, pid, seq, flags,
3298                              NL80211_CMD_NEW_SCAN_RESULTS);
3299         if (!hdr)
3300                 return -1;
3301
3302         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3303         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3304
3305         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3306         if (!bss)
3307                 goto nla_put_failure;
3308         if (!is_zero_ether_addr(res->bssid))
3309                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3310         if (res->information_elements && res->len_information_elements)
3311                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3312                         res->len_information_elements,
3313                         res->information_elements);
3314         if (res->beacon_ies && res->len_beacon_ies &&
3315             res->beacon_ies != res->information_elements)
3316                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3317                         res->len_beacon_ies, res->beacon_ies);
3318         if (res->tsf)
3319                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3320         if (res->beacon_interval)
3321                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3322         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3323         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3324         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3325                 jiffies_to_msecs(jiffies - intbss->ts));
3326
3327         switch (rdev->wiphy.signal_type) {
3328         case CFG80211_SIGNAL_TYPE_MBM:
3329                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3330                 break;
3331         case CFG80211_SIGNAL_TYPE_UNSPEC:
3332                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3333                 break;
3334         default:
3335                 break;
3336         }
3337
3338         switch (wdev->iftype) {
3339         case NL80211_IFTYPE_P2P_CLIENT:
3340         case NL80211_IFTYPE_STATION:
3341                 if (intbss == wdev->current_bss)
3342                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3343                                     NL80211_BSS_STATUS_ASSOCIATED);
3344                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3345                         if (intbss != wdev->auth_bsses[i])
3346                                 continue;
3347                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3348                                     NL80211_BSS_STATUS_AUTHENTICATED);
3349                         break;
3350                 }
3351                 break;
3352         case NL80211_IFTYPE_ADHOC:
3353                 if (intbss == wdev->current_bss)
3354                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3355                                     NL80211_BSS_STATUS_IBSS_JOINED);
3356                 break;
3357         default:
3358                 break;
3359         }
3360
3361         nla_nest_end(msg, bss);
3362
3363         return genlmsg_end(msg, hdr);
3364
3365  nla_put_failure:
3366         genlmsg_cancel(msg, hdr);
3367         return -EMSGSIZE;
3368 }
3369
3370 static int nl80211_dump_scan(struct sk_buff *skb,
3371                              struct netlink_callback *cb)
3372 {
3373         struct cfg80211_registered_device *rdev;
3374         struct net_device *dev;
3375         struct cfg80211_internal_bss *scan;
3376         struct wireless_dev *wdev;
3377         int start = cb->args[1], idx = 0;
3378         int err;
3379
3380         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3381         if (err)
3382                 return err;
3383
3384         wdev = dev->ieee80211_ptr;
3385
3386         wdev_lock(wdev);
3387         spin_lock_bh(&rdev->bss_lock);
3388         cfg80211_bss_expire(rdev);
3389
3390         list_for_each_entry(scan, &rdev->bss_list, list) {
3391                 if (++idx <= start)
3392                         continue;
3393                 if (nl80211_send_bss(skb,
3394                                 NETLINK_CB(cb->skb).pid,
3395                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3396                                 rdev, wdev, scan) < 0) {
3397                         idx--;
3398                         break;
3399                 }
3400         }
3401
3402         spin_unlock_bh(&rdev->bss_lock);
3403         wdev_unlock(wdev);
3404
3405         cb->args[1] = idx;
3406         nl80211_finish_netdev_dump(rdev);
3407
3408         return skb->len;
3409 }
3410
3411 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3412                                 int flags, struct net_device *dev,
3413                                 struct survey_info *survey)
3414 {
3415         void *hdr;
3416         struct nlattr *infoattr;
3417
3418         /* Survey without a channel doesn't make sense */
3419         if (!survey->channel)
3420                 return -EINVAL;
3421
3422         hdr = nl80211hdr_put(msg, pid, seq, flags,
3423                              NL80211_CMD_NEW_SURVEY_RESULTS);
3424         if (!hdr)
3425                 return -ENOMEM;
3426
3427         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3428
3429         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3430         if (!infoattr)
3431                 goto nla_put_failure;
3432
3433         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3434                     survey->channel->center_freq);
3435         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3436                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3437                             survey->noise);
3438         if (survey->filled & SURVEY_INFO_IN_USE)
3439                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3440         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3441                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3442                             survey->channel_time);
3443         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3444                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3445                             survey->channel_time_busy);
3446         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3447                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3448                             survey->channel_time_ext_busy);
3449         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3450                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3451                             survey->channel_time_rx);
3452         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3453                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3454                             survey->channel_time_tx);
3455
3456         nla_nest_end(msg, infoattr);
3457
3458         return genlmsg_end(msg, hdr);
3459
3460  nla_put_failure:
3461         genlmsg_cancel(msg, hdr);
3462         return -EMSGSIZE;
3463 }
3464
3465 static int nl80211_dump_survey(struct sk_buff *skb,
3466                         struct netlink_callback *cb)
3467 {
3468         struct survey_info survey;
3469         struct cfg80211_registered_device *dev;
3470         struct net_device *netdev;
3471         int survey_idx = cb->args[1];
3472         int res;
3473
3474         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3475         if (res)
3476                 return res;
3477
3478         if (!dev->ops->dump_survey) {
3479                 res = -EOPNOTSUPP;
3480                 goto out_err;
3481         }
3482
3483         while (1) {
3484                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3485                                             &survey);
3486                 if (res == -ENOENT)
3487                         break;
3488                 if (res)
3489                         goto out_err;
3490
3491                 if (nl80211_send_survey(skb,
3492                                 NETLINK_CB(cb->skb).pid,
3493                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3494                                 netdev,
3495                                 &survey) < 0)
3496                         goto out;
3497                 survey_idx++;
3498         }
3499
3500  out:
3501         cb->args[1] = survey_idx;
3502         res = skb->len;
3503  out_err:
3504         nl80211_finish_netdev_dump(dev);
3505         return res;
3506 }
3507
3508 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3509 {
3510         return auth_type <= NL80211_AUTHTYPE_MAX;
3511 }
3512
3513 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3514 {
3515         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3516                                   NL80211_WPA_VERSION_2));
3517 }
3518
3519 static bool nl80211_valid_akm_suite(u32 akm)
3520 {
3521         return akm == WLAN_AKM_SUITE_8021X ||
3522                 akm == WLAN_AKM_SUITE_PSK;
3523 }
3524
3525 static bool nl80211_valid_cipher_suite(u32 cipher)
3526 {
3527         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3528                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3529                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3530                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3531                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3532 }
3533
3534
3535 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3536 {
3537         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3538         struct net_device *dev = info->user_ptr[1];
3539         struct ieee80211_channel *chan;
3540         const u8 *bssid, *ssid, *ie = NULL;
3541         int err, ssid_len, ie_len = 0;
3542         enum nl80211_auth_type auth_type;
3543         struct key_parse key;
3544         bool local_state_change;
3545
3546         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3547                 return -EINVAL;
3548
3549         if (!info->attrs[NL80211_ATTR_MAC])
3550                 return -EINVAL;
3551
3552         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3553                 return -EINVAL;
3554
3555         if (!info->attrs[NL80211_ATTR_SSID])
3556                 return -EINVAL;
3557
3558         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3559                 return -EINVAL;
3560
3561         err = nl80211_parse_key(info, &key);
3562         if (err)
3563                 return err;
3564
3565         if (key.idx >= 0) {
3566                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3567                         return -EINVAL;
3568                 if (!key.p.key || !key.p.key_len)
3569                         return -EINVAL;
3570                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3571                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3572                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3573                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3574                         return -EINVAL;
3575                 if (key.idx > 4)
3576                         return -EINVAL;
3577         } else {
3578                 key.p.key_len = 0;
3579                 key.p.key = NULL;
3580         }
3581
3582         if (key.idx >= 0) {
3583                 int i;
3584                 bool ok = false;
3585                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3586                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3587                                 ok = true;
3588                                 break;
3589                         }
3590                 }
3591                 if (!ok)
3592                         return -EINVAL;
3593         }
3594
3595         if (!rdev->ops->auth)
3596                 return -EOPNOTSUPP;
3597
3598         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3599             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3600                 return -EOPNOTSUPP;
3601
3602         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3603         chan = ieee80211_get_channel(&rdev->wiphy,
3604                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3605         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3606                 return -EINVAL;
3607
3608         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3609         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3610
3611         if (info->attrs[NL80211_ATTR_IE]) {
3612                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3613                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3614         }
3615
3616         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3617         if (!nl80211_valid_auth_type(auth_type))
3618                 return -EINVAL;
3619
3620         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3621
3622         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3623                                   ssid, ssid_len, ie, ie_len,
3624                                   key.p.key, key.p.key_len, key.idx,
3625                                   local_state_change);
3626 }
3627
3628 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3629                                    struct genl_info *info,
3630                                    struct cfg80211_crypto_settings *settings,
3631                                    int cipher_limit)
3632 {
3633         memset(settings, 0, sizeof(*settings));
3634
3635         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3636
3637         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3638                 u16 proto;
3639                 proto = nla_get_u16(
3640                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3641                 settings->control_port_ethertype = cpu_to_be16(proto);
3642                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3643                     proto != ETH_P_PAE)
3644                         return -EINVAL;
3645                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3646                         settings->control_port_no_encrypt = true;
3647         } else
3648                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3649
3650         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3651                 void *data;
3652                 int len, i;
3653
3654                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3655                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3656                 settings->n_ciphers_pairwise = len / sizeof(u32);
3657
3658                 if (len % sizeof(u32))
3659                         return -EINVAL;
3660
3661                 if (settings->n_ciphers_pairwise > cipher_limit)
3662                         return -EINVAL;
3663
3664                 memcpy(settings->ciphers_pairwise, data, len);
3665
3666                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3667                         if (!nl80211_valid_cipher_suite(
3668                                         settings->ciphers_pairwise[i]))
3669                                 return -EINVAL;
3670         }
3671
3672         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3673                 settings->cipher_group =
3674                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3675                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3676                         return -EINVAL;
3677         }
3678
3679         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3680                 settings->wpa_versions =
3681                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3682                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3683                         return -EINVAL;
3684         }
3685
3686         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3687                 void *data;
3688                 int len, i;
3689
3690                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3691                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3692                 settings->n_akm_suites = len / sizeof(u32);
3693
3694                 if (len % sizeof(u32))
3695                         return -EINVAL;
3696
3697                 memcpy(settings->akm_suites, data, len);
3698
3699                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3700                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3701                                 return -EINVAL;
3702         }
3703
3704         return 0;
3705 }
3706
3707 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3708 {
3709         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3710         struct net_device *dev = info->user_ptr[1];
3711         struct cfg80211_crypto_settings crypto;
3712         struct ieee80211_channel *chan;
3713         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3714         int err, ssid_len, ie_len = 0;
3715         bool use_mfp = false;
3716
3717         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3718                 return -EINVAL;
3719
3720         if (!info->attrs[NL80211_ATTR_MAC] ||
3721             !info->attrs[NL80211_ATTR_SSID] ||
3722             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3723                 return -EINVAL;
3724
3725         if (!rdev->ops->assoc)
3726                 return -EOPNOTSUPP;
3727
3728         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3729             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3730                 return -EOPNOTSUPP;
3731
3732         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3733
3734         chan = ieee80211_get_channel(&rdev->wiphy,
3735                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3736         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3737                 return -EINVAL;
3738
3739         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3740         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3741
3742         if (info->attrs[NL80211_ATTR_IE]) {
3743                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3744                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3745         }
3746
3747         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3748                 enum nl80211_mfp mfp =
3749                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3750                 if (mfp == NL80211_MFP_REQUIRED)
3751                         use_mfp = true;
3752                 else if (mfp != NL80211_MFP_NO)
3753                         return -EINVAL;
3754         }
3755
3756         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3757                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3758
3759         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3760         if (!err)
3761                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3762                                           ssid, ssid_len, ie, ie_len, use_mfp,
3763                                           &crypto);
3764
3765         return err;
3766 }
3767
3768 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3769 {
3770         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3771         struct net_device *dev = info->user_ptr[1];
3772         const u8 *ie = NULL, *bssid;
3773         int ie_len = 0;
3774         u16 reason_code;
3775         bool local_state_change;
3776
3777         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3778                 return -EINVAL;
3779
3780         if (!info->attrs[NL80211_ATTR_MAC])
3781                 return -EINVAL;
3782
3783         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3784                 return -EINVAL;
3785
3786         if (!rdev->ops->deauth)
3787                 return -EOPNOTSUPP;
3788
3789         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3790             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3791                 return -EOPNOTSUPP;
3792
3793         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3794
3795         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3796         if (reason_code == 0) {
3797                 /* Reason Code 0 is reserved */
3798                 return -EINVAL;
3799         }
3800
3801         if (info->attrs[NL80211_ATTR_IE]) {
3802                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3803                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3804         }
3805
3806         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3807
3808         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3809                                     local_state_change);
3810 }
3811
3812 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3813 {
3814         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3815         struct net_device *dev = info->user_ptr[1];
3816         const u8 *ie = NULL, *bssid;
3817         int ie_len = 0;
3818         u16 reason_code;
3819         bool local_state_change;
3820
3821         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3822                 return -EINVAL;
3823
3824         if (!info->attrs[NL80211_ATTR_MAC])
3825                 return -EINVAL;
3826
3827         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3828                 return -EINVAL;
3829
3830         if (!rdev->ops->disassoc)
3831                 return -EOPNOTSUPP;
3832
3833         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3834             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3835                 return -EOPNOTSUPP;
3836
3837         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3838
3839         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3840         if (reason_code == 0) {
3841                 /* Reason Code 0 is reserved */
3842                 return -EINVAL;
3843         }
3844
3845         if (info->attrs[NL80211_ATTR_IE]) {
3846                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3847                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3848         }
3849
3850         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3851
3852         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3853                                       local_state_change);
3854 }
3855
3856 static bool
3857 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
3858                          int mcast_rate[IEEE80211_NUM_BANDS],
3859                          int rateval)
3860 {
3861         struct wiphy *wiphy = &rdev->wiphy;
3862         bool found = false;
3863         int band, i;
3864
3865         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3866                 struct ieee80211_supported_band *sband;
3867
3868                 sband = wiphy->bands[band];
3869                 if (!sband)
3870                         continue;
3871
3872                 for (i = 0; i < sband->n_bitrates; i++) {
3873                         if (sband->bitrates[i].bitrate == rateval) {
3874                                 mcast_rate[band] = i + 1;
3875                                 found = true;
3876                                 break;
3877                         }
3878                 }
3879         }
3880
3881         return found;
3882 }
3883
3884 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3885 {
3886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3887         struct net_device *dev = info->user_ptr[1];
3888         struct cfg80211_ibss_params ibss;
3889         struct wiphy *wiphy;
3890         struct cfg80211_cached_keys *connkeys = NULL;
3891         int err;
3892
3893         memset(&ibss, 0, sizeof(ibss));
3894
3895         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3896                 return -EINVAL;
3897
3898         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3899             !info->attrs[NL80211_ATTR_SSID] ||
3900             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3901                 return -EINVAL;
3902
3903         ibss.beacon_interval = 100;
3904
3905         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3906                 ibss.beacon_interval =
3907                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3908                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3909                         return -EINVAL;
3910         }
3911
3912         if (!rdev->ops->join_ibss)
3913                 return -EOPNOTSUPP;
3914
3915         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3916                 return -EOPNOTSUPP;
3917
3918         wiphy = &rdev->wiphy;
3919
3920         if (info->attrs[NL80211_ATTR_MAC])
3921                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3922         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3923         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3924
3925         if (info->attrs[NL80211_ATTR_IE]) {
3926                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3927                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3928         }
3929
3930         ibss.channel = ieee80211_get_channel(wiphy,
3931                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3932         if (!ibss.channel ||
3933             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3934             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
3935                 return -EINVAL;
3936
3937         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3938         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3939
3940         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3941                 u8 *rates =
3942                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3943                 int n_rates =
3944                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3945                 struct ieee80211_supported_band *sband =
3946                         wiphy->bands[ibss.channel->band];
3947                 int i, j;
3948
3949                 if (n_rates == 0)
3950                         return -EINVAL;
3951
3952                 for (i = 0; i < n_rates; i++) {
3953                         int rate = (rates[i] & 0x7f) * 5;
3954                         bool found = false;
3955
3956                         for (j = 0; j < sband->n_bitrates; j++) {
3957                                 if (sband->bitrates[j].bitrate == rate) {
3958                                         found = true;
3959                                         ibss.basic_rates |= BIT(j);
3960                                         break;
3961                                 }
3962                         }
3963                         if (!found)
3964                                 return -EINVAL;
3965                 }
3966         }
3967
3968         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
3969             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
3970                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
3971                 return -EINVAL;
3972
3973         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3974                 connkeys = nl80211_parse_connkeys(rdev,
3975                                         info->attrs[NL80211_ATTR_KEYS]);
3976                 if (IS_ERR(connkeys))
3977                         return PTR_ERR(connkeys);
3978         }
3979
3980         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3981         if (err)
3982                 kfree(connkeys);
3983         return err;
3984 }
3985
3986 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3987 {
3988         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3989         struct net_device *dev = info->user_ptr[1];
3990
3991         if (!rdev->ops->leave_ibss)
3992                 return -EOPNOTSUPP;
3993
3994         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
3995                 return -EOPNOTSUPP;
3996
3997         return cfg80211_leave_ibss(rdev, dev, false);
3998 }
3999
4000 #ifdef CONFIG_NL80211_TESTMODE
4001 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4002         .name = "testmode",
4003 };
4004
4005 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4006 {
4007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4008         int err;
4009
4010         if (!info->attrs[NL80211_ATTR_TESTDATA])
4011                 return -EINVAL;
4012
4013         err = -EOPNOTSUPP;
4014         if (rdev->ops->testmode_cmd) {
4015                 rdev->testmode_info = info;
4016                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4017                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4018                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4019                 rdev->testmode_info = NULL;
4020         }
4021
4022         return err;
4023 }
4024
4025 static struct sk_buff *
4026 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4027                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4028 {
4029         struct sk_buff *skb;
4030         void *hdr;
4031         struct nlattr *data;
4032
4033         skb = nlmsg_new(approxlen + 100, gfp);
4034         if (!skb)
4035                 return NULL;
4036
4037         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4038         if (!hdr) {
4039                 kfree_skb(skb);
4040                 return NULL;
4041         }
4042
4043         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4044         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4045
4046         ((void **)skb->cb)[0] = rdev;
4047         ((void **)skb->cb)[1] = hdr;
4048         ((void **)skb->cb)[2] = data;
4049
4050         return skb;
4051
4052  nla_put_failure:
4053         kfree_skb(skb);
4054         return NULL;
4055 }
4056
4057 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4058                                                   int approxlen)
4059 {
4060         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4061
4062         if (WARN_ON(!rdev->testmode_info))
4063                 return NULL;
4064
4065         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4066                                 rdev->testmode_info->snd_pid,
4067                                 rdev->testmode_info->snd_seq,
4068                                 GFP_KERNEL);
4069 }
4070 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4071
4072 int cfg80211_testmode_reply(struct sk_buff *skb)
4073 {
4074         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4075         void *hdr = ((void **)skb->cb)[1];
4076         struct nlattr *data = ((void **)skb->cb)[2];
4077
4078         if (WARN_ON(!rdev->testmode_info)) {
4079                 kfree_skb(skb);
4080                 return -EINVAL;
4081         }
4082
4083         nla_nest_end(skb, data);
4084         genlmsg_end(skb, hdr);
4085         return genlmsg_reply(skb, rdev->testmode_info);
4086 }
4087 EXPORT_SYMBOL(cfg80211_testmode_reply);
4088
4089 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4090                                                   int approxlen, gfp_t gfp)
4091 {
4092         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4093
4094         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4095 }
4096 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4097
4098 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4099 {
4100         void *hdr = ((void **)skb->cb)[1];
4101         struct nlattr *data = ((void **)skb->cb)[2];
4102
4103         nla_nest_end(skb, data);
4104         genlmsg_end(skb, hdr);
4105         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4106 }
4107 EXPORT_SYMBOL(cfg80211_testmode_event);
4108 #endif
4109
4110 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4111 {
4112         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4113         struct net_device *dev = info->user_ptr[1];
4114         struct cfg80211_connect_params connect;
4115         struct wiphy *wiphy;
4116         struct cfg80211_cached_keys *connkeys = NULL;
4117         int err;
4118
4119         memset(&connect, 0, sizeof(connect));
4120
4121         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4122                 return -EINVAL;
4123
4124         if (!info->attrs[NL80211_ATTR_SSID] ||
4125             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4126                 return -EINVAL;
4127
4128         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4129                 connect.auth_type =
4130                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4131                 if (!nl80211_valid_auth_type(connect.auth_type))
4132                         return -EINVAL;
4133         } else
4134                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4135
4136         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4137
4138         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4139                                       NL80211_MAX_NR_CIPHER_SUITES);
4140         if (err)
4141                 return err;
4142
4143         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4144             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4145                 return -EOPNOTSUPP;
4146
4147         wiphy = &rdev->wiphy;
4148
4149         if (info->attrs[NL80211_ATTR_MAC])
4150                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4151         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4152         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4153
4154         if (info->attrs[NL80211_ATTR_IE]) {
4155                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4156                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4157         }
4158
4159         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4160                 connect.channel =
4161                         ieee80211_get_channel(wiphy,
4162                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4163                 if (!connect.channel ||
4164                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4165                         return -EINVAL;
4166         }
4167
4168         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4169                 connkeys = nl80211_parse_connkeys(rdev,
4170                                         info->attrs[NL80211_ATTR_KEYS]);
4171                 if (IS_ERR(connkeys))
4172                         return PTR_ERR(connkeys);
4173         }
4174
4175         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4176         if (err)
4177                 kfree(connkeys);
4178         return err;
4179 }
4180
4181 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4182 {
4183         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4184         struct net_device *dev = info->user_ptr[1];
4185         u16 reason;
4186
4187         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4188                 reason = WLAN_REASON_DEAUTH_LEAVING;
4189         else
4190                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4191
4192         if (reason == 0)
4193                 return -EINVAL;
4194
4195         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4196             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4197                 return -EOPNOTSUPP;
4198
4199         return cfg80211_disconnect(rdev, dev, reason, true);
4200 }
4201
4202 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4203 {
4204         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4205         struct net *net;
4206         int err;
4207         u32 pid;
4208
4209         if (!info->attrs[NL80211_ATTR_PID])
4210                 return -EINVAL;
4211
4212         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4213
4214         net = get_net_ns_by_pid(pid);
4215         if (IS_ERR(net))
4216                 return PTR_ERR(net);
4217
4218         err = 0;
4219
4220         /* check if anything to do */
4221         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4222                 err = cfg80211_switch_netns(rdev, net);
4223
4224         put_net(net);
4225         return err;
4226 }
4227
4228 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4229 {
4230         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4231         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4232                         struct cfg80211_pmksa *pmksa) = NULL;
4233         struct net_device *dev = info->user_ptr[1];
4234         struct cfg80211_pmksa pmksa;
4235
4236         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4237
4238         if (!info->attrs[NL80211_ATTR_MAC])
4239                 return -EINVAL;
4240
4241         if (!info->attrs[NL80211_ATTR_PMKID])
4242                 return -EINVAL;
4243
4244         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4245         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4246
4247         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4248             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4249                 return -EOPNOTSUPP;
4250
4251         switch (info->genlhdr->cmd) {
4252         case NL80211_CMD_SET_PMKSA:
4253                 rdev_ops = rdev->ops->set_pmksa;
4254                 break;
4255         case NL80211_CMD_DEL_PMKSA:
4256                 rdev_ops = rdev->ops->del_pmksa;
4257                 break;
4258         default:
4259                 WARN_ON(1);
4260                 break;
4261         }
4262
4263         if (!rdev_ops)
4264                 return -EOPNOTSUPP;
4265
4266         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4267 }
4268
4269 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4270 {
4271         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4272         struct net_device *dev = info->user_ptr[1];
4273
4274         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4275             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4276                 return -EOPNOTSUPP;
4277
4278         if (!rdev->ops->flush_pmksa)
4279                 return -EOPNOTSUPP;
4280
4281         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4282 }
4283
4284 static int nl80211_remain_on_channel(struct sk_buff *skb,
4285                                      struct genl_info *info)
4286 {
4287         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4288         struct net_device *dev = info->user_ptr[1];
4289         struct ieee80211_channel *chan;
4290         struct sk_buff *msg;
4291         void *hdr;
4292         u64 cookie;
4293         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4294         u32 freq, duration;
4295         int err;
4296
4297         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4298             !info->attrs[NL80211_ATTR_DURATION])
4299                 return -EINVAL;
4300
4301         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4302
4303         /*
4304          * We should be on that channel for at least one jiffie,
4305          * and more than 5 seconds seems excessive.
4306          */
4307         if (!duration || !msecs_to_jiffies(duration) ||
4308             duration > rdev->wiphy.max_remain_on_channel_duration)
4309                 return -EINVAL;
4310
4311         if (!rdev->ops->remain_on_channel)
4312                 return -EOPNOTSUPP;
4313
4314         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4315                 channel_type = nla_get_u32(
4316                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4317                 if (channel_type != NL80211_CHAN_NO_HT &&
4318                     channel_type != NL80211_CHAN_HT20 &&
4319                     channel_type != NL80211_CHAN_HT40PLUS &&
4320                     channel_type != NL80211_CHAN_HT40MINUS)
4321                         return -EINVAL;
4322         }
4323
4324         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4325         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4326         if (chan == NULL)
4327                 return -EINVAL;
4328
4329         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4330         if (!msg)
4331                 return -ENOMEM;
4332
4333         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4334                              NL80211_CMD_REMAIN_ON_CHANNEL);
4335
4336         if (IS_ERR(hdr)) {
4337                 err = PTR_ERR(hdr);
4338                 goto free_msg;
4339         }
4340
4341         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4342                                            channel_type, duration, &cookie);
4343
4344         if (err)
4345                 goto free_msg;
4346
4347         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4348
4349         genlmsg_end(msg, hdr);
4350
4351         return genlmsg_reply(msg, info);
4352
4353  nla_put_failure:
4354         err = -ENOBUFS;
4355  free_msg:
4356         nlmsg_free(msg);
4357         return err;
4358 }
4359
4360 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4361                                             struct genl_info *info)
4362 {
4363         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4364         struct net_device *dev = info->user_ptr[1];
4365         u64 cookie;
4366
4367         if (!info->attrs[NL80211_ATTR_COOKIE])
4368                 return -EINVAL;
4369
4370         if (!rdev->ops->cancel_remain_on_channel)
4371                 return -EOPNOTSUPP;
4372
4373         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4374
4375         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4376 }
4377
4378 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4379                            u8 *rates, u8 rates_len)
4380 {
4381         u8 i;
4382         u32 mask = 0;
4383
4384         for (i = 0; i < rates_len; i++) {
4385                 int rate = (rates[i] & 0x7f) * 5;
4386                 int ridx;
4387                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4388                         struct ieee80211_rate *srate =
4389                                 &sband->bitrates[ridx];
4390                         if (rate == srate->bitrate) {
4391                                 mask |= 1 << ridx;
4392                                 break;
4393                         }
4394                 }
4395                 if (ridx == sband->n_bitrates)
4396                         return 0; /* rate not found */
4397         }
4398
4399         return mask;
4400 }
4401
4402 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4403         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4404                                     .len = NL80211_MAX_SUPP_RATES },
4405 };
4406
4407 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4408                                        struct genl_info *info)
4409 {
4410         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4411         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4412         struct cfg80211_bitrate_mask mask;
4413         int rem, i;
4414         struct net_device *dev = info->user_ptr[1];
4415         struct nlattr *tx_rates;
4416         struct ieee80211_supported_band *sband;
4417
4418         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4419                 return -EINVAL;
4420
4421         if (!rdev->ops->set_bitrate_mask)
4422                 return -EOPNOTSUPP;
4423
4424         memset(&mask, 0, sizeof(mask));
4425         /* Default to all rates enabled */
4426         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4427                 sband = rdev->wiphy.bands[i];
4428                 mask.control[i].legacy =
4429                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4430         }
4431
4432         /*
4433          * The nested attribute uses enum nl80211_band as the index. This maps
4434          * directly to the enum ieee80211_band values used in cfg80211.
4435          */
4436         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4437         {
4438                 enum ieee80211_band band = nla_type(tx_rates);
4439                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4440                         return -EINVAL;
4441                 sband = rdev->wiphy.bands[band];
4442                 if (sband == NULL)
4443                         return -EINVAL;
4444                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4445                           nla_len(tx_rates), nl80211_txattr_policy);
4446                 if (tb[NL80211_TXRATE_LEGACY]) {
4447                         mask.control[band].legacy = rateset_to_mask(
4448                                 sband,
4449                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4450                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4451                         if (mask.control[band].legacy == 0)
4452                                 return -EINVAL;
4453                 }
4454         }
4455
4456         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4457 }
4458
4459 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4460 {
4461         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4462         struct net_device *dev = info->user_ptr[1];
4463         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4464
4465         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4466                 return -EINVAL;
4467
4468         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4469                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4470
4471         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4472             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4473             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4474             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4475             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4476             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4477             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4478                 return -EOPNOTSUPP;
4479
4480         /* not much point in registering if we can't reply */
4481         if (!rdev->ops->mgmt_tx)
4482                 return -EOPNOTSUPP;
4483
4484         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4485                         frame_type,
4486                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4487                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4488 }
4489
4490 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4491 {
4492         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4493         struct net_device *dev = info->user_ptr[1];
4494         struct ieee80211_channel *chan;
4495         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4496         bool channel_type_valid = false;
4497         u32 freq;
4498         int err;
4499         void *hdr;
4500         u64 cookie;
4501         struct sk_buff *msg;
4502         unsigned int wait = 0;
4503         bool offchan;
4504
4505         if (!info->attrs[NL80211_ATTR_FRAME] ||
4506             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4507                 return -EINVAL;
4508
4509         if (!rdev->ops->mgmt_tx)
4510                 return -EOPNOTSUPP;
4511
4512         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4513             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4514             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4515             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4516             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4517             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4518             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4519                 return -EOPNOTSUPP;
4520
4521         if (info->attrs[NL80211_ATTR_DURATION]) {
4522                 if (!rdev->ops->mgmt_tx_cancel_wait)
4523                         return -EINVAL;
4524                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4525         }
4526
4527         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4528                 channel_type = nla_get_u32(
4529                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4530                 if (channel_type != NL80211_CHAN_NO_HT &&
4531                     channel_type != NL80211_CHAN_HT20 &&
4532                     channel_type != NL80211_CHAN_HT40PLUS &&
4533                     channel_type != NL80211_CHAN_HT40MINUS)
4534                         return -EINVAL;
4535                 channel_type_valid = true;
4536         }
4537
4538         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4539
4540         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4541         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4542         if (chan == NULL)
4543                 return -EINVAL;
4544
4545         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4546         if (!msg)
4547                 return -ENOMEM;
4548
4549         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4550                              NL80211_CMD_FRAME);
4551
4552         if (IS_ERR(hdr)) {
4553                 err = PTR_ERR(hdr);
4554                 goto free_msg;
4555         }
4556         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4557                                     channel_type_valid, wait,
4558                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4559                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4560                                     &cookie);
4561         if (err)
4562                 goto free_msg;
4563
4564         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4565
4566         genlmsg_end(msg, hdr);
4567         return genlmsg_reply(msg, info);
4568
4569  nla_put_failure:
4570         err = -ENOBUFS;
4571  free_msg:
4572         nlmsg_free(msg);
4573         return err;
4574 }
4575
4576 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4577 {
4578         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4579         struct net_device *dev = info->user_ptr[1];
4580         u64 cookie;
4581
4582         if (!info->attrs[NL80211_ATTR_COOKIE])
4583                 return -EINVAL;
4584
4585         if (!rdev->ops->mgmt_tx_cancel_wait)
4586                 return -EOPNOTSUPP;
4587
4588         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4589             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4590             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4591             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4592             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4593             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4594                 return -EOPNOTSUPP;
4595
4596         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4597
4598         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4599 }
4600
4601 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4602 {
4603         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4604         struct wireless_dev *wdev;
4605         struct net_device *dev = info->user_ptr[1];
4606         u8 ps_state;
4607         bool state;
4608         int err;
4609
4610         if (!info->attrs[NL80211_ATTR_PS_STATE])
4611                 return -EINVAL;
4612
4613         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4614
4615         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4616                 return -EINVAL;
4617
4618         wdev = dev->ieee80211_ptr;
4619
4620         if (!rdev->ops->set_power_mgmt)
4621                 return -EOPNOTSUPP;
4622
4623         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4624
4625         if (state == wdev->ps)
4626                 return 0;
4627
4628         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4629                                         wdev->ps_timeout);
4630         if (!err)
4631                 wdev->ps = state;
4632         return err;
4633 }
4634
4635 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4636 {
4637         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4638         enum nl80211_ps_state ps_state;
4639         struct wireless_dev *wdev;
4640         struct net_device *dev = info->user_ptr[1];
4641         struct sk_buff *msg;
4642         void *hdr;
4643         int err;
4644
4645         wdev = dev->ieee80211_ptr;
4646
4647         if (!rdev->ops->set_power_mgmt)
4648                 return -EOPNOTSUPP;
4649
4650         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4651         if (!msg)
4652                 return -ENOMEM;
4653
4654         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4655                              NL80211_CMD_GET_POWER_SAVE);
4656         if (!hdr) {
4657                 err = -ENOBUFS;
4658                 goto free_msg;
4659         }
4660
4661         if (wdev->ps)
4662                 ps_state = NL80211_PS_ENABLED;
4663         else
4664                 ps_state = NL80211_PS_DISABLED;
4665
4666         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4667
4668         genlmsg_end(msg, hdr);
4669         return genlmsg_reply(msg, info);
4670
4671  nla_put_failure:
4672         err = -ENOBUFS;
4673  free_msg:
4674         nlmsg_free(msg);
4675         return err;
4676 }
4677
4678 static struct nla_policy
4679 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4680         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4681         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4682         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4683 };
4684
4685 static int nl80211_set_cqm_rssi(struct genl_info *info,
4686                                 s32 threshold, u32 hysteresis)
4687 {
4688         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4689         struct wireless_dev *wdev;
4690         struct net_device *dev = info->user_ptr[1];
4691
4692         if (threshold > 0)
4693                 return -EINVAL;
4694
4695         wdev = dev->ieee80211_ptr;
4696
4697         if (!rdev->ops->set_cqm_rssi_config)
4698                 return -EOPNOTSUPP;
4699
4700         if (wdev->iftype != NL80211_IFTYPE_STATION &&
4701             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4702                 return -EOPNOTSUPP;
4703
4704         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4705                                               threshold, hysteresis);
4706 }
4707
4708 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4709 {
4710         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4711         struct nlattr *cqm;
4712         int err;
4713
4714         cqm = info->attrs[NL80211_ATTR_CQM];
4715         if (!cqm) {
4716                 err = -EINVAL;
4717                 goto out;
4718         }
4719
4720         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4721                                nl80211_attr_cqm_policy);
4722         if (err)
4723                 goto out;
4724
4725         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4726             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4727                 s32 threshold;
4728                 u32 hysteresis;
4729                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4730                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4731                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4732         } else
4733                 err = -EINVAL;
4734
4735 out:
4736         return err;
4737 }
4738
4739 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
4740 {
4741         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4742         struct net_device *dev = info->user_ptr[1];
4743         struct mesh_config cfg;
4744         struct mesh_setup setup;
4745         int err;
4746
4747         /* start with default */
4748         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
4749         memcpy(&setup, &default_mesh_setup, sizeof(setup));
4750
4751         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
4752                 /* and parse parameters if given */
4753                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
4754                 if (err)
4755                         return err;
4756         }
4757
4758         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
4759             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
4760                 return -EINVAL;
4761
4762         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
4763         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
4764
4765         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
4766                 /* parse additional setup parameters if given */
4767                 err = nl80211_parse_mesh_setup(info, &setup);
4768                 if (err)
4769                         return err;
4770         }
4771
4772         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
4773 }
4774
4775 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
4776 {
4777         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4778         struct net_device *dev = info->user_ptr[1];
4779
4780         return cfg80211_leave_mesh(rdev, dev);
4781 }
4782
4783 #define NL80211_FLAG_NEED_WIPHY         0x01
4784 #define NL80211_FLAG_NEED_NETDEV        0x02
4785 #define NL80211_FLAG_NEED_RTNL          0x04
4786 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
4787 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
4788                                          NL80211_FLAG_CHECK_NETDEV_UP)
4789
4790 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
4791                             struct genl_info *info)
4792 {
4793         struct cfg80211_registered_device *rdev;
4794         struct net_device *dev;
4795         int err;
4796         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
4797
4798         if (rtnl)
4799                 rtnl_lock();
4800
4801         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
4802                 rdev = cfg80211_get_dev_from_info(info);
4803                 if (IS_ERR(rdev)) {
4804                         if (rtnl)
4805                                 rtnl_unlock();
4806                         return PTR_ERR(rdev);
4807                 }
4808                 info->user_ptr[0] = rdev;
4809         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
4810                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4811                 if (err) {
4812                         if (rtnl)
4813                                 rtnl_unlock();
4814                         return err;
4815                 }
4816                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
4817                     !netif_running(dev)) {
4818                         cfg80211_unlock_rdev(rdev);
4819                         dev_put(dev);
4820                         if (rtnl)
4821                                 rtnl_unlock();
4822                         return -ENETDOWN;
4823                 }
4824                 info->user_ptr[0] = rdev;
4825                 info->user_ptr[1] = dev;
4826         }
4827
4828         return 0;
4829 }
4830
4831 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
4832                               struct genl_info *info)
4833 {
4834         if (info->user_ptr[0])
4835                 cfg80211_unlock_rdev(info->user_ptr[0]);
4836         if (info->user_ptr[1])
4837                 dev_put(info->user_ptr[1]);
4838         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
4839                 rtnl_unlock();
4840 }
4841
4842 static struct genl_ops nl80211_ops[] = {
4843         {
4844                 .cmd = NL80211_CMD_GET_WIPHY,
4845                 .doit = nl80211_get_wiphy,
4846                 .dumpit = nl80211_dump_wiphy,
4847                 .policy = nl80211_policy,
4848                 /* can be retrieved by unprivileged users */
4849                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
4850         },
4851         {
4852                 .cmd = NL80211_CMD_SET_WIPHY,
4853                 .doit = nl80211_set_wiphy,
4854                 .policy = nl80211_policy,
4855                 .flags = GENL_ADMIN_PERM,
4856                 .internal_flags = NL80211_FLAG_NEED_RTNL,
4857         },
4858         {
4859                 .cmd = NL80211_CMD_GET_INTERFACE,
4860                 .doit = nl80211_get_interface,
4861                 .dumpit = nl80211_dump_interface,
4862                 .policy = nl80211_policy,
4863                 /* can be retrieved by unprivileged users */
4864                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
4865         },
4866         {
4867                 .cmd = NL80211_CMD_SET_INTERFACE,
4868                 .doit = nl80211_set_interface,
4869                 .policy = nl80211_policy,
4870                 .flags = GENL_ADMIN_PERM,
4871                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4872                                   NL80211_FLAG_NEED_RTNL,
4873         },
4874         {
4875                 .cmd = NL80211_CMD_NEW_INTERFACE,
4876                 .doit = nl80211_new_interface,
4877                 .policy = nl80211_policy,
4878                 .flags = GENL_ADMIN_PERM,
4879                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
4880                                   NL80211_FLAG_NEED_RTNL,
4881         },
4882         {
4883                 .cmd = NL80211_CMD_DEL_INTERFACE,
4884                 .doit = nl80211_del_interface,
4885                 .policy = nl80211_policy,
4886                 .flags = GENL_ADMIN_PERM,
4887                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4888                                   NL80211_FLAG_NEED_RTNL,
4889         },
4890         {
4891                 .cmd = NL80211_CMD_GET_KEY,
4892                 .doit = nl80211_get_key,
4893                 .policy = nl80211_policy,
4894                 .flags = GENL_ADMIN_PERM,
4895                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4896                                   NL80211_FLAG_NEED_RTNL,
4897         },
4898         {
4899                 .cmd = NL80211_CMD_SET_KEY,
4900                 .doit = nl80211_set_key,
4901                 .policy = nl80211_policy,
4902                 .flags = GENL_ADMIN_PERM,
4903                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4904                                   NL80211_FLAG_NEED_RTNL,
4905         },
4906         {
4907                 .cmd = NL80211_CMD_NEW_KEY,
4908                 .doit = nl80211_new_key,
4909                 .policy = nl80211_policy,
4910                 .flags = GENL_ADMIN_PERM,
4911                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4912                                   NL80211_FLAG_NEED_RTNL,
4913         },
4914         {
4915                 .cmd = NL80211_CMD_DEL_KEY,
4916                 .doit = nl80211_del_key,
4917                 .policy = nl80211_policy,
4918                 .flags = GENL_ADMIN_PERM,
4919                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4920                                   NL80211_FLAG_NEED_RTNL,
4921         },
4922         {
4923                 .cmd = NL80211_CMD_SET_BEACON,
4924                 .policy = nl80211_policy,
4925                 .flags = GENL_ADMIN_PERM,
4926                 .doit = nl80211_addset_beacon,
4927                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4928                                   NL80211_FLAG_NEED_RTNL,
4929         },
4930         {
4931                 .cmd = NL80211_CMD_NEW_BEACON,
4932                 .policy = nl80211_policy,
4933                 .flags = GENL_ADMIN_PERM,
4934                 .doit = nl80211_addset_beacon,
4935                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4936                                   NL80211_FLAG_NEED_RTNL,
4937         },
4938         {
4939                 .cmd = NL80211_CMD_DEL_BEACON,
4940                 .policy = nl80211_policy,
4941                 .flags = GENL_ADMIN_PERM,
4942                 .doit = nl80211_del_beacon,
4943                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4944                                   NL80211_FLAG_NEED_RTNL,
4945         },
4946         {
4947                 .cmd = NL80211_CMD_GET_STATION,
4948                 .doit = nl80211_get_station,
4949                 .dumpit = nl80211_dump_station,
4950                 .policy = nl80211_policy,
4951                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4952                                   NL80211_FLAG_NEED_RTNL,
4953         },
4954         {
4955                 .cmd = NL80211_CMD_SET_STATION,
4956                 .doit = nl80211_set_station,
4957                 .policy = nl80211_policy,
4958                 .flags = GENL_ADMIN_PERM,
4959                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4960                                   NL80211_FLAG_NEED_RTNL,
4961         },
4962         {
4963                 .cmd = NL80211_CMD_NEW_STATION,
4964                 .doit = nl80211_new_station,
4965                 .policy = nl80211_policy,
4966                 .flags = GENL_ADMIN_PERM,
4967                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4968                                   NL80211_FLAG_NEED_RTNL,
4969         },
4970         {
4971                 .cmd = NL80211_CMD_DEL_STATION,
4972                 .doit = nl80211_del_station,
4973                 .policy = nl80211_policy,
4974                 .flags = GENL_ADMIN_PERM,
4975                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
4976                                   NL80211_FLAG_NEED_RTNL,
4977         },
4978         {
4979                 .cmd = NL80211_CMD_GET_MPATH,
4980                 .doit = nl80211_get_mpath,
4981                 .dumpit = nl80211_dump_mpath,
4982                 .policy = nl80211_policy,
4983                 .flags = GENL_ADMIN_PERM,
4984                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4985                                   NL80211_FLAG_NEED_RTNL,
4986         },
4987         {
4988                 .cmd = NL80211_CMD_SET_MPATH,
4989                 .doit = nl80211_set_mpath,
4990                 .policy = nl80211_policy,
4991                 .flags = GENL_ADMIN_PERM,
4992                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
4993                                   NL80211_FLAG_NEED_RTNL,
4994         },
4995         {
4996                 .cmd = NL80211_CMD_NEW_MPATH,
4997                 .doit = nl80211_new_mpath,
4998                 .policy = nl80211_policy,
4999                 .flags = GENL_ADMIN_PERM,
5000                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5001                                   NL80211_FLAG_NEED_RTNL,
5002         },
5003         {
5004                 .cmd = NL80211_CMD_DEL_MPATH,
5005                 .doit = nl80211_del_mpath,
5006                 .policy = nl80211_policy,
5007                 .flags = GENL_ADMIN_PERM,
5008                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5009                                   NL80211_FLAG_NEED_RTNL,
5010         },
5011         {
5012                 .cmd = NL80211_CMD_SET_BSS,
5013                 .doit = nl80211_set_bss,
5014                 .policy = nl80211_policy,
5015                 .flags = GENL_ADMIN_PERM,
5016                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5017                                   NL80211_FLAG_NEED_RTNL,
5018         },
5019         {
5020                 .cmd = NL80211_CMD_GET_REG,
5021                 .doit = nl80211_get_reg,
5022                 .policy = nl80211_policy,
5023                 /* can be retrieved by unprivileged users */
5024         },
5025         {
5026                 .cmd = NL80211_CMD_SET_REG,
5027                 .doit = nl80211_set_reg,
5028                 .policy = nl80211_policy,
5029                 .flags = GENL_ADMIN_PERM,
5030         },
5031         {
5032                 .cmd = NL80211_CMD_REQ_SET_REG,
5033                 .doit = nl80211_req_set_reg,
5034                 .policy = nl80211_policy,
5035                 .flags = GENL_ADMIN_PERM,
5036         },
5037         {
5038                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
5039                 .doit = nl80211_get_mesh_config,
5040                 .policy = nl80211_policy,
5041                 /* can be retrieved by unprivileged users */
5042                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5043                                   NL80211_FLAG_NEED_RTNL,
5044         },
5045         {
5046                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
5047                 .doit = nl80211_update_mesh_config,
5048                 .policy = nl80211_policy,
5049                 .flags = GENL_ADMIN_PERM,
5050                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5051                                   NL80211_FLAG_NEED_RTNL,
5052         },
5053         {
5054                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5055                 .doit = nl80211_trigger_scan,
5056                 .policy = nl80211_policy,
5057                 .flags = GENL_ADMIN_PERM,
5058                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5059                                   NL80211_FLAG_NEED_RTNL,
5060         },
5061         {
5062                 .cmd = NL80211_CMD_GET_SCAN,
5063                 .policy = nl80211_policy,
5064                 .dumpit = nl80211_dump_scan,
5065         },
5066         {
5067                 .cmd = NL80211_CMD_AUTHENTICATE,
5068                 .doit = nl80211_authenticate,
5069                 .policy = nl80211_policy,
5070                 .flags = GENL_ADMIN_PERM,
5071                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5072                                   NL80211_FLAG_NEED_RTNL,
5073         },
5074         {
5075                 .cmd = NL80211_CMD_ASSOCIATE,
5076                 .doit = nl80211_associate,
5077                 .policy = nl80211_policy,
5078                 .flags = GENL_ADMIN_PERM,
5079                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5080                                   NL80211_FLAG_NEED_RTNL,
5081         },
5082         {
5083                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5084                 .doit = nl80211_deauthenticate,
5085                 .policy = nl80211_policy,
5086                 .flags = GENL_ADMIN_PERM,
5087                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5088                                   NL80211_FLAG_NEED_RTNL,
5089         },
5090         {
5091                 .cmd = NL80211_CMD_DISASSOCIATE,
5092                 .doit = nl80211_disassociate,
5093                 .policy = nl80211_policy,
5094                 .flags = GENL_ADMIN_PERM,
5095                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5096                                   NL80211_FLAG_NEED_RTNL,
5097         },
5098         {
5099                 .cmd = NL80211_CMD_JOIN_IBSS,
5100                 .doit = nl80211_join_ibss,
5101                 .policy = nl80211_policy,
5102                 .flags = GENL_ADMIN_PERM,
5103                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5104                                   NL80211_FLAG_NEED_RTNL,
5105         },
5106         {
5107                 .cmd = NL80211_CMD_LEAVE_IBSS,
5108                 .doit = nl80211_leave_ibss,
5109                 .policy = nl80211_policy,
5110                 .flags = GENL_ADMIN_PERM,
5111                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5112                                   NL80211_FLAG_NEED_RTNL,
5113         },
5114 #ifdef CONFIG_NL80211_TESTMODE
5115         {
5116                 .cmd = NL80211_CMD_TESTMODE,
5117                 .doit = nl80211_testmode_do,
5118                 .policy = nl80211_policy,
5119                 .flags = GENL_ADMIN_PERM,
5120                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5121                                   NL80211_FLAG_NEED_RTNL,
5122         },
5123 #endif
5124         {
5125                 .cmd = NL80211_CMD_CONNECT,
5126                 .doit = nl80211_connect,
5127                 .policy = nl80211_policy,
5128                 .flags = GENL_ADMIN_PERM,
5129                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5130                                   NL80211_FLAG_NEED_RTNL,
5131         },
5132         {
5133                 .cmd = NL80211_CMD_DISCONNECT,
5134                 .doit = nl80211_disconnect,
5135                 .policy = nl80211_policy,
5136                 .flags = GENL_ADMIN_PERM,
5137                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5138                                   NL80211_FLAG_NEED_RTNL,
5139         },
5140         {
5141                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5142                 .doit = nl80211_wiphy_netns,
5143                 .policy = nl80211_policy,
5144                 .flags = GENL_ADMIN_PERM,
5145                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5146                                   NL80211_FLAG_NEED_RTNL,
5147         },
5148         {
5149                 .cmd = NL80211_CMD_GET_SURVEY,
5150                 .policy = nl80211_policy,
5151                 .dumpit = nl80211_dump_survey,
5152         },
5153         {
5154                 .cmd = NL80211_CMD_SET_PMKSA,
5155                 .doit = nl80211_setdel_pmksa,
5156                 .policy = nl80211_policy,
5157                 .flags = GENL_ADMIN_PERM,
5158                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5159                                   NL80211_FLAG_NEED_RTNL,
5160         },
5161         {
5162                 .cmd = NL80211_CMD_DEL_PMKSA,
5163                 .doit = nl80211_setdel_pmksa,
5164                 .policy = nl80211_policy,
5165                 .flags = GENL_ADMIN_PERM,
5166                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5167                                   NL80211_FLAG_NEED_RTNL,
5168         },
5169         {
5170                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5171                 .doit = nl80211_flush_pmksa,
5172                 .policy = nl80211_policy,
5173                 .flags = GENL_ADMIN_PERM,
5174                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5175                                   NL80211_FLAG_NEED_RTNL,
5176         },
5177         {
5178                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5179                 .doit = nl80211_remain_on_channel,
5180                 .policy = nl80211_policy,
5181                 .flags = GENL_ADMIN_PERM,
5182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5183                                   NL80211_FLAG_NEED_RTNL,
5184         },
5185         {
5186                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5187                 .doit = nl80211_cancel_remain_on_channel,
5188                 .policy = nl80211_policy,
5189                 .flags = GENL_ADMIN_PERM,
5190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5191                                   NL80211_FLAG_NEED_RTNL,
5192         },
5193         {
5194                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5195                 .doit = nl80211_set_tx_bitrate_mask,
5196                 .policy = nl80211_policy,
5197                 .flags = GENL_ADMIN_PERM,
5198                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5199                                   NL80211_FLAG_NEED_RTNL,
5200         },
5201         {
5202                 .cmd = NL80211_CMD_REGISTER_FRAME,
5203                 .doit = nl80211_register_mgmt,
5204                 .policy = nl80211_policy,
5205                 .flags = GENL_ADMIN_PERM,
5206                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5207                                   NL80211_FLAG_NEED_RTNL,
5208         },
5209         {
5210                 .cmd = NL80211_CMD_FRAME,
5211                 .doit = nl80211_tx_mgmt,
5212                 .policy = nl80211_policy,
5213                 .flags = GENL_ADMIN_PERM,
5214                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5215                                   NL80211_FLAG_NEED_RTNL,
5216         },
5217         {
5218                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5219                 .doit = nl80211_tx_mgmt_cancel_wait,
5220                 .policy = nl80211_policy,
5221                 .flags = GENL_ADMIN_PERM,
5222                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5223                                   NL80211_FLAG_NEED_RTNL,
5224         },
5225         {
5226                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5227                 .doit = nl80211_set_power_save,
5228                 .policy = nl80211_policy,
5229                 .flags = GENL_ADMIN_PERM,
5230                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5231                                   NL80211_FLAG_NEED_RTNL,
5232         },
5233         {
5234                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5235                 .doit = nl80211_get_power_save,
5236                 .policy = nl80211_policy,
5237                 /* can be retrieved by unprivileged users */
5238                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5239                                   NL80211_FLAG_NEED_RTNL,
5240         },
5241         {
5242                 .cmd = NL80211_CMD_SET_CQM,
5243                 .doit = nl80211_set_cqm,
5244                 .policy = nl80211_policy,
5245                 .flags = GENL_ADMIN_PERM,
5246                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5247                                   NL80211_FLAG_NEED_RTNL,
5248         },
5249         {
5250                 .cmd = NL80211_CMD_SET_CHANNEL,
5251                 .doit = nl80211_set_channel,
5252                 .policy = nl80211_policy,
5253                 .flags = GENL_ADMIN_PERM,
5254                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5255                                   NL80211_FLAG_NEED_RTNL,
5256         },
5257         {
5258                 .cmd = NL80211_CMD_SET_WDS_PEER,
5259                 .doit = nl80211_set_wds_peer,
5260                 .policy = nl80211_policy,
5261                 .flags = GENL_ADMIN_PERM,
5262                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5263                                   NL80211_FLAG_NEED_RTNL,
5264         },
5265         {
5266                 .cmd = NL80211_CMD_JOIN_MESH,
5267                 .doit = nl80211_join_mesh,
5268                 .policy = nl80211_policy,
5269                 .flags = GENL_ADMIN_PERM,
5270                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5271                                   NL80211_FLAG_NEED_RTNL,
5272         },
5273         {
5274                 .cmd = NL80211_CMD_LEAVE_MESH,
5275                 .doit = nl80211_leave_mesh,
5276                 .policy = nl80211_policy,
5277                 .flags = GENL_ADMIN_PERM,
5278                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5279                                   NL80211_FLAG_NEED_RTNL,
5280         },
5281 };
5282
5283 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5284         .name = "mlme",
5285 };
5286
5287 /* multicast groups */
5288 static struct genl_multicast_group nl80211_config_mcgrp = {
5289         .name = "config",
5290 };
5291 static struct genl_multicast_group nl80211_scan_mcgrp = {
5292         .name = "scan",
5293 };
5294 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5295         .name = "regulatory",
5296 };
5297
5298 /* notification functions */
5299
5300 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5301 {
5302         struct sk_buff *msg;
5303
5304         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5305         if (!msg)
5306                 return;
5307
5308         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5309                 nlmsg_free(msg);
5310                 return;
5311         }
5312
5313         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5314                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5315 }
5316
5317 static int nl80211_add_scan_req(struct sk_buff *msg,
5318                                 struct cfg80211_registered_device *rdev)
5319 {
5320         struct cfg80211_scan_request *req = rdev->scan_req;
5321         struct nlattr *nest;
5322         int i;
5323
5324         ASSERT_RDEV_LOCK(rdev);
5325
5326         if (WARN_ON(!req))
5327                 return 0;
5328
5329         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5330         if (!nest)
5331                 goto nla_put_failure;
5332         for (i = 0; i < req->n_ssids; i++)
5333                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5334         nla_nest_end(msg, nest);
5335
5336         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5337         if (!nest)
5338                 goto nla_put_failure;
5339         for (i = 0; i < req->n_channels; i++)
5340                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5341         nla_nest_end(msg, nest);
5342
5343         if (req->ie)
5344                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5345
5346         return 0;
5347  nla_put_failure:
5348         return -ENOBUFS;
5349 }
5350
5351 static int nl80211_send_scan_msg(struct sk_buff *msg,
5352                                  struct cfg80211_registered_device *rdev,
5353                                  struct net_device *netdev,
5354                                  u32 pid, u32 seq, int flags,
5355                                  u32 cmd)
5356 {
5357         void *hdr;
5358
5359         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5360         if (!hdr)
5361                 return -1;
5362
5363         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5364         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5365
5366         /* ignore errors and send incomplete event anyway */
5367         nl80211_add_scan_req(msg, rdev);
5368
5369         return genlmsg_end(msg, hdr);
5370
5371  nla_put_failure:
5372         genlmsg_cancel(msg, hdr);
5373         return -EMSGSIZE;
5374 }
5375
5376 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5377                              struct net_device *netdev)
5378 {
5379         struct sk_buff *msg;
5380
5381         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5382         if (!msg)
5383                 return;
5384
5385         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5386                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5387                 nlmsg_free(msg);
5388                 return;
5389         }
5390
5391         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5392                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5393 }
5394
5395 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5396                             struct net_device *netdev)
5397 {
5398         struct sk_buff *msg;
5399
5400         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5401         if (!msg)
5402                 return;
5403
5404         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5405                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5406                 nlmsg_free(msg);
5407                 return;
5408         }
5409
5410         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5411                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5412 }
5413
5414 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5415                                struct net_device *netdev)
5416 {
5417         struct sk_buff *msg;
5418
5419         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5420         if (!msg)
5421                 return;
5422
5423         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5424                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5425                 nlmsg_free(msg);
5426                 return;
5427         }
5428
5429         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5430                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5431 }
5432
5433 /*
5434  * This can happen on global regulatory changes or device specific settings
5435  * based on custom world regulatory domains.
5436  */
5437 void nl80211_send_reg_change_event(struct regulatory_request *request)
5438 {
5439         struct sk_buff *msg;
5440         void *hdr;
5441
5442         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5443         if (!msg)
5444                 return;
5445
5446         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5447         if (!hdr) {
5448                 nlmsg_free(msg);
5449                 return;
5450         }
5451
5452         /* Userspace can always count this one always being set */
5453         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5454
5455         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5456                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5457                            NL80211_REGDOM_TYPE_WORLD);
5458         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5459                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5460                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5461         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5462                  request->intersect)
5463                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5464                            NL80211_REGDOM_TYPE_INTERSECTION);
5465         else {
5466                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5467                            NL80211_REGDOM_TYPE_COUNTRY);
5468                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5469         }
5470
5471         if (wiphy_idx_valid(request->wiphy_idx))
5472                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5473
5474         if (genlmsg_end(msg, hdr) < 0) {
5475                 nlmsg_free(msg);
5476                 return;
5477         }
5478
5479         rcu_read_lock();
5480         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5481                                 GFP_ATOMIC);
5482         rcu_read_unlock();
5483
5484         return;
5485
5486 nla_put_failure:
5487         genlmsg_cancel(msg, hdr);
5488         nlmsg_free(msg);
5489 }
5490
5491 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5492                                     struct net_device *netdev,
5493                                     const u8 *buf, size_t len,
5494                                     enum nl80211_commands cmd, gfp_t gfp)
5495 {
5496         struct sk_buff *msg;
5497         void *hdr;
5498
5499         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5500         if (!msg)
5501                 return;
5502
5503         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5504         if (!hdr) {
5505                 nlmsg_free(msg);
5506                 return;
5507         }
5508
5509         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5510         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5511         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5512
5513         if (genlmsg_end(msg, hdr) < 0) {
5514                 nlmsg_free(msg);
5515                 return;
5516         }
5517
5518         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5519                                 nl80211_mlme_mcgrp.id, gfp);
5520         return;
5521
5522  nla_put_failure:
5523         genlmsg_cancel(msg, hdr);
5524         nlmsg_free(msg);
5525 }
5526
5527 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5528                           struct net_device *netdev, const u8 *buf,
5529                           size_t len, gfp_t gfp)
5530 {
5531         nl80211_send_mlme_event(rdev, netdev, buf, len,
5532                                 NL80211_CMD_AUTHENTICATE, gfp);
5533 }
5534
5535 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5536                            struct net_device *netdev, const u8 *buf,
5537                            size_t len, gfp_t gfp)
5538 {
5539         nl80211_send_mlme_event(rdev, netdev, buf, len,
5540                                 NL80211_CMD_ASSOCIATE, gfp);
5541 }
5542
5543 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5544                          struct net_device *netdev, const u8 *buf,
5545                          size_t len, gfp_t gfp)
5546 {
5547         nl80211_send_mlme_event(rdev, netdev, buf, len,
5548                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5549 }
5550
5551 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5552                            struct net_device *netdev, const u8 *buf,
5553                            size_t len, gfp_t gfp)
5554 {
5555         nl80211_send_mlme_event(rdev, netdev, buf, len,
5556                                 NL80211_CMD_DISASSOCIATE, gfp);
5557 }
5558
5559 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
5560                                 struct net_device *netdev, const u8 *buf,
5561                                 size_t len, gfp_t gfp)
5562 {
5563         nl80211_send_mlme_event(rdev, netdev, buf, len,
5564                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
5565 }
5566
5567 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
5568                                   struct net_device *netdev, const u8 *buf,
5569                                   size_t len, gfp_t gfp)
5570 {
5571         nl80211_send_mlme_event(rdev, netdev, buf, len,
5572                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
5573 }
5574
5575 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5576                                       struct net_device *netdev, int cmd,
5577                                       const u8 *addr, gfp_t gfp)
5578 {
5579         struct sk_buff *msg;
5580         void *hdr;
5581
5582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5583         if (!msg)
5584                 return;
5585
5586         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5587         if (!hdr) {
5588                 nlmsg_free(msg);
5589                 return;
5590         }
5591
5592         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5593         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5594         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5595         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5596
5597         if (genlmsg_end(msg, hdr) < 0) {
5598                 nlmsg_free(msg);
5599                 return;
5600         }
5601
5602         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5603                                 nl80211_mlme_mcgrp.id, gfp);
5604         return;
5605
5606  nla_put_failure:
5607         genlmsg_cancel(msg, hdr);
5608         nlmsg_free(msg);
5609 }
5610
5611 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5612                                struct net_device *netdev, const u8 *addr,
5613                                gfp_t gfp)
5614 {
5615         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5616                                   addr, gfp);
5617 }
5618
5619 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5620                                 struct net_device *netdev, const u8 *addr,
5621                                 gfp_t gfp)
5622 {
5623         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5624                                   addr, gfp);
5625 }
5626
5627 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5628                                  struct net_device *netdev, const u8 *bssid,
5629                                  const u8 *req_ie, size_t req_ie_len,
5630                                  const u8 *resp_ie, size_t resp_ie_len,
5631                                  u16 status, gfp_t gfp)
5632 {
5633         struct sk_buff *msg;
5634         void *hdr;
5635
5636         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5637         if (!msg)
5638                 return;
5639
5640         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5641         if (!hdr) {
5642                 nlmsg_free(msg);
5643                 return;
5644         }
5645
5646         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5647         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5648         if (bssid)
5649                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5650         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5651         if (req_ie)
5652                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5653         if (resp_ie)
5654                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5655
5656         if (genlmsg_end(msg, hdr) < 0) {
5657                 nlmsg_free(msg);
5658                 return;
5659         }
5660
5661         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5662                                 nl80211_mlme_mcgrp.id, gfp);
5663         return;
5664
5665  nla_put_failure:
5666         genlmsg_cancel(msg, hdr);
5667         nlmsg_free(msg);
5668
5669 }
5670
5671 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5672                          struct net_device *netdev, const u8 *bssid,
5673                          const u8 *req_ie, size_t req_ie_len,
5674                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5675 {
5676         struct sk_buff *msg;
5677         void *hdr;
5678
5679         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5680         if (!msg)
5681                 return;
5682
5683         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5684         if (!hdr) {
5685                 nlmsg_free(msg);
5686                 return;
5687         }
5688
5689         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5690         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5691         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5692         if (req_ie)
5693                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5694         if (resp_ie)
5695                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5696
5697         if (genlmsg_end(msg, hdr) < 0) {
5698                 nlmsg_free(msg);
5699                 return;
5700         }
5701
5702         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5703                                 nl80211_mlme_mcgrp.id, gfp);
5704         return;
5705
5706  nla_put_failure:
5707         genlmsg_cancel(msg, hdr);
5708         nlmsg_free(msg);
5709
5710 }
5711
5712 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5713                                struct net_device *netdev, u16 reason,
5714                                const u8 *ie, size_t ie_len, bool from_ap)
5715 {
5716         struct sk_buff *msg;
5717         void *hdr;
5718
5719         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5720         if (!msg)
5721                 return;
5722
5723         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5724         if (!hdr) {
5725                 nlmsg_free(msg);
5726                 return;
5727         }
5728
5729         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5730         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5731         if (from_ap && reason)
5732                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5733         if (from_ap)
5734                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5735         if (ie)
5736                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5737
5738         if (genlmsg_end(msg, hdr) < 0) {
5739                 nlmsg_free(msg);
5740                 return;
5741         }
5742
5743         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5744                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5745         return;
5746
5747  nla_put_failure:
5748         genlmsg_cancel(msg, hdr);
5749         nlmsg_free(msg);
5750
5751 }
5752
5753 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5754                              struct net_device *netdev, const u8 *bssid,
5755                              gfp_t gfp)
5756 {
5757         struct sk_buff *msg;
5758         void *hdr;
5759
5760         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5761         if (!msg)
5762                 return;
5763
5764         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5765         if (!hdr) {
5766                 nlmsg_free(msg);
5767                 return;
5768         }
5769
5770         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5771         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5772         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5773
5774         if (genlmsg_end(msg, hdr) < 0) {
5775                 nlmsg_free(msg);
5776                 return;
5777         }
5778
5779         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5780                                 nl80211_mlme_mcgrp.id, gfp);
5781         return;
5782
5783  nla_put_failure:
5784         genlmsg_cancel(msg, hdr);
5785         nlmsg_free(msg);
5786 }
5787
5788 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5789                                  struct net_device *netdev, const u8 *addr,
5790                                  enum nl80211_key_type key_type, int key_id,
5791                                  const u8 *tsc, gfp_t gfp)
5792 {
5793         struct sk_buff *msg;
5794         void *hdr;
5795
5796         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5797         if (!msg)
5798                 return;
5799
5800         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5801         if (!hdr) {
5802                 nlmsg_free(msg);
5803                 return;
5804         }
5805
5806         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5807         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5808         if (addr)
5809                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5810         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5811         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5812         if (tsc)
5813                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5814
5815         if (genlmsg_end(msg, hdr) < 0) {
5816                 nlmsg_free(msg);
5817                 return;
5818         }
5819
5820         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5821                                 nl80211_mlme_mcgrp.id, gfp);
5822         return;
5823
5824  nla_put_failure:
5825         genlmsg_cancel(msg, hdr);
5826         nlmsg_free(msg);
5827 }
5828
5829 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5830                                     struct ieee80211_channel *channel_before,
5831                                     struct ieee80211_channel *channel_after)
5832 {
5833         struct sk_buff *msg;
5834         void *hdr;
5835         struct nlattr *nl_freq;
5836
5837         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5838         if (!msg)
5839                 return;
5840
5841         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5842         if (!hdr) {
5843                 nlmsg_free(msg);
5844                 return;
5845         }
5846
5847         /*
5848          * Since we are applying the beacon hint to a wiphy we know its
5849          * wiphy_idx is valid
5850          */
5851         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5852
5853         /* Before */
5854         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5855         if (!nl_freq)
5856                 goto nla_put_failure;
5857         if (nl80211_msg_put_channel(msg, channel_before))
5858                 goto nla_put_failure;
5859         nla_nest_end(msg, nl_freq);
5860
5861         /* After */
5862         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5863         if (!nl_freq)
5864                 goto nla_put_failure;
5865         if (nl80211_msg_put_channel(msg, channel_after))
5866                 goto nla_put_failure;
5867         nla_nest_end(msg, nl_freq);
5868
5869         if (genlmsg_end(msg, hdr) < 0) {
5870                 nlmsg_free(msg);
5871                 return;
5872         }
5873
5874         rcu_read_lock();
5875         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5876                                 GFP_ATOMIC);
5877         rcu_read_unlock();
5878
5879         return;
5880
5881 nla_put_failure:
5882         genlmsg_cancel(msg, hdr);
5883         nlmsg_free(msg);
5884 }
5885
5886 static void nl80211_send_remain_on_chan_event(
5887         int cmd, struct cfg80211_registered_device *rdev,
5888         struct net_device *netdev, u64 cookie,
5889         struct ieee80211_channel *chan,
5890         enum nl80211_channel_type channel_type,
5891         unsigned int duration, gfp_t gfp)
5892 {
5893         struct sk_buff *msg;
5894         void *hdr;
5895
5896         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5897         if (!msg)
5898                 return;
5899
5900         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5901         if (!hdr) {
5902                 nlmsg_free(msg);
5903                 return;
5904         }
5905
5906         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5907         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5908         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5909         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5910         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5911
5912         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5913                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5914
5915         if (genlmsg_end(msg, hdr) < 0) {
5916                 nlmsg_free(msg);
5917                 return;
5918         }
5919
5920         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5921                                 nl80211_mlme_mcgrp.id, gfp);
5922         return;
5923
5924  nla_put_failure:
5925         genlmsg_cancel(msg, hdr);
5926         nlmsg_free(msg);
5927 }
5928
5929 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5930                                     struct net_device *netdev, u64 cookie,
5931                                     struct ieee80211_channel *chan,
5932                                     enum nl80211_channel_type channel_type,
5933                                     unsigned int duration, gfp_t gfp)
5934 {
5935         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5936                                           rdev, netdev, cookie, chan,
5937                                           channel_type, duration, gfp);
5938 }
5939
5940 void nl80211_send_remain_on_channel_cancel(
5941         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5942         u64 cookie, struct ieee80211_channel *chan,
5943         enum nl80211_channel_type channel_type, gfp_t gfp)
5944 {
5945         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5946                                           rdev, netdev, cookie, chan,
5947                                           channel_type, 0, gfp);
5948 }
5949
5950 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5951                             struct net_device *dev, const u8 *mac_addr,
5952                             struct station_info *sinfo, gfp_t gfp)
5953 {
5954         struct sk_buff *msg;
5955
5956         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5957         if (!msg)
5958                 return;
5959
5960         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5961                 nlmsg_free(msg);
5962                 return;
5963         }
5964
5965         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5966                                 nl80211_mlme_mcgrp.id, gfp);
5967 }
5968
5969 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
5970                       struct net_device *netdev, u32 nlpid,
5971                       int freq, const u8 *buf, size_t len, gfp_t gfp)
5972 {
5973         struct sk_buff *msg;
5974         void *hdr;
5975         int err;
5976
5977         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5978         if (!msg)
5979                 return -ENOMEM;
5980
5981         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
5982         if (!hdr) {
5983                 nlmsg_free(msg);
5984                 return -ENOMEM;
5985         }
5986
5987         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5988         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5989         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5990         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5991
5992         err = genlmsg_end(msg, hdr);
5993         if (err < 0) {
5994                 nlmsg_free(msg);
5995                 return err;
5996         }
5997
5998         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5999         if (err < 0)
6000                 return err;
6001         return 0;
6002
6003  nla_put_failure:
6004         genlmsg_cancel(msg, hdr);
6005         nlmsg_free(msg);
6006         return -ENOBUFS;
6007 }
6008
6009 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
6010                                  struct net_device *netdev, u64 cookie,
6011                                  const u8 *buf, size_t len, bool ack,
6012                                  gfp_t gfp)
6013 {
6014         struct sk_buff *msg;
6015         void *hdr;
6016
6017         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6018         if (!msg)
6019                 return;
6020
6021         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6022         if (!hdr) {
6023                 nlmsg_free(msg);
6024                 return;
6025         }
6026
6027         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6028         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6029         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6030         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6031         if (ack)
6032                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6033
6034         if (genlmsg_end(msg, hdr) < 0) {
6035                 nlmsg_free(msg);
6036                 return;
6037         }
6038
6039         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6040         return;
6041
6042  nla_put_failure:
6043         genlmsg_cancel(msg, hdr);
6044         nlmsg_free(msg);
6045 }
6046
6047 void
6048 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6049                              struct net_device *netdev,
6050                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6051                              gfp_t gfp)
6052 {
6053         struct sk_buff *msg;
6054         struct nlattr *pinfoattr;
6055         void *hdr;
6056
6057         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6058         if (!msg)
6059                 return;
6060
6061         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6062         if (!hdr) {
6063                 nlmsg_free(msg);
6064                 return;
6065         }
6066
6067         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6068         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6069
6070         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6071         if (!pinfoattr)
6072                 goto nla_put_failure;
6073
6074         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6075                     rssi_event);
6076
6077         nla_nest_end(msg, pinfoattr);
6078
6079         if (genlmsg_end(msg, hdr) < 0) {
6080                 nlmsg_free(msg);
6081                 return;
6082         }
6083
6084         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6085                                 nl80211_mlme_mcgrp.id, gfp);
6086         return;
6087
6088  nla_put_failure:
6089         genlmsg_cancel(msg, hdr);
6090         nlmsg_free(msg);
6091 }
6092
6093 void
6094 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
6095                                 struct net_device *netdev, const u8 *peer,
6096                                 u32 num_packets, gfp_t gfp)
6097 {
6098         struct sk_buff *msg;
6099         struct nlattr *pinfoattr;
6100         void *hdr;
6101
6102         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6103         if (!msg)
6104                 return;
6105
6106         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6107         if (!hdr) {
6108                 nlmsg_free(msg);
6109                 return;
6110         }
6111
6112         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6113         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6114         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6115
6116         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6117         if (!pinfoattr)
6118                 goto nla_put_failure;
6119
6120         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6121
6122         nla_nest_end(msg, pinfoattr);
6123
6124         if (genlmsg_end(msg, hdr) < 0) {
6125                 nlmsg_free(msg);
6126                 return;
6127         }
6128
6129         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6130                                 nl80211_mlme_mcgrp.id, gfp);
6131         return;
6132
6133  nla_put_failure:
6134         genlmsg_cancel(msg, hdr);
6135         nlmsg_free(msg);
6136 }
6137
6138 static int nl80211_netlink_notify(struct notifier_block * nb,
6139                                   unsigned long state,
6140                                   void *_notify)
6141 {
6142         struct netlink_notify *notify = _notify;
6143         struct cfg80211_registered_device *rdev;
6144         struct wireless_dev *wdev;
6145
6146         if (state != NETLINK_URELEASE)
6147                 return NOTIFY_DONE;
6148
6149         rcu_read_lock();
6150
6151         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6152                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6153                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6154
6155         rcu_read_unlock();
6156
6157         return NOTIFY_DONE;
6158 }
6159
6160 static struct notifier_block nl80211_netlink_notifier = {
6161         .notifier_call = nl80211_netlink_notify,
6162 };
6163
6164 /* initialisation/exit functions */
6165
6166 int nl80211_init(void)
6167 {
6168         int err;
6169
6170         err = genl_register_family_with_ops(&nl80211_fam,
6171                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6172         if (err)
6173                 return err;
6174
6175         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6176         if (err)
6177                 goto err_out;
6178
6179         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6180         if (err)
6181                 goto err_out;
6182
6183         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6184         if (err)
6185                 goto err_out;
6186
6187         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6188         if (err)
6189                 goto err_out;
6190
6191 #ifdef CONFIG_NL80211_TESTMODE
6192         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6193         if (err)
6194                 goto err_out;
6195 #endif
6196
6197         err = netlink_register_notifier(&nl80211_netlink_notifier);
6198         if (err)
6199                 goto err_out;
6200
6201         return 0;
6202  err_out:
6203         genl_unregister_family(&nl80211_fam);
6204         return err;
6205 }
6206
6207 void nl80211_exit(void)
6208 {
6209         netlink_unregister_notifier(&nl80211_netlink_notifier);
6210         genl_unregister_family(&nl80211_fam);
6211 }