net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <[email protected]>
   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         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 128
 129         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 130                                          .len = NL80211_HT_CAPABILITY_LEN },
 131
 132         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 133         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 134                               .len = IEEE80211_MAX_DATA_LEN },
 135         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 136         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 137
 138         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 139                                 .len = IEEE80211_MAX_SSID_LEN },
 140         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 141         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 142         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 143         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 144         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 145         [NL80211_ATTR_STA_FLAGS2] = {
 146                 .len = sizeof(struct nl80211_sta_flag_update),
 147         },
 148         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 149         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 150         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 151         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 152         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 153         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 154         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 155         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 156         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 157                                  .len = WLAN_PMKID_LEN },
 158         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 159         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 160         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 161         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 162                                  .len = IEEE80211_MAX_DATA_LEN },
 163         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 164         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 165         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 166         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 167         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 168         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 170         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 171         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 172         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 173         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 174         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 175         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 176         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 177         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 178 };
 179
 180 /* policy for the key attributes */
 181 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 182         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 183         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 184         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 185         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 186         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 187         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 188         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 189         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 190 };
 191
 192 /* policy for the key default flags */
 193 static const struct nla_policy
 194 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 195         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 196         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 197 };
 198
 199 /* policy for WoWLAN attributes */
 200 static const struct nla_policy
 201 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 202         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 203         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 204         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 205         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 206 };
 207
 208 /* ifidx get helper */
 209 static int nl80211_get_ifidx(struct netlink_callback *cb)
 210 {
 211         int res;
 212
 213         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 214                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 215                           nl80211_policy);
 216         if (res)
 217                 return res;
 218
 219         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 220                 return -EINVAL;
 221
 222         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 223         if (!res)
 224                 return -EINVAL;
 225         return res;
 226 }
 227
 228 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 229                                        struct netlink_callback *cb,
 230                                        struct cfg80211_registered_device **rdev,
 231                                        struct net_device **dev)
 232 {
 233         int ifidx = cb->args[0];
 234         int err;
 235
 236         if (!ifidx)
 237                 ifidx = nl80211_get_ifidx(cb);
 238         if (ifidx < 0)
 239                 return ifidx;
 240
 241         cb->args[0] = ifidx;
 242
 243         rtnl_lock();
 244
 245         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 246         if (!*dev) {
 247                 err = -ENODEV;
 248                 goto out_rtnl;
 249         }
 250
 251         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 252         if (IS_ERR(*rdev)) {
 253                 err = PTR_ERR(*rdev);
 254                 goto out_rtnl;
 255         }
 256
 257         return 0;
 258  out_rtnl:
 259         rtnl_unlock();
 260         return err;
 261 }
 262
 263 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 264 {
 265         cfg80211_unlock_rdev(rdev);
 266         rtnl_unlock();
 267 }
 268
 269 /* IE validation */
 270 static bool is_valid_ie_attr(const struct nlattr *attr)
 271 {
 272         const u8 *pos;
 273         int len;
 274
 275         if (!attr)
 276                 return true;
 277
 278         pos = nla_data(attr);
 279         len = nla_len(attr);
 280
 281         while (len) {
 282                 u8 elemlen;
 283
 284                 if (len < 2)
 285                         return false;
 286                 len -= 2;
 287
 288                 elemlen = pos[1];
 289                 if (elemlen > len)
 290                         return false;
 291
 292                 len -= elemlen;
 293                 pos += 2 + elemlen;
 294         }
 295
 296         return true;
 297 }
 298
 299 /* message building helper */
 300 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 301                                    int flags, u8 cmd)
 302 {
 303         /* since there is no private header just add the generic one */
 304         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 305 }
 306
 307 static int nl80211_msg_put_channel(struct sk_buff *msg,
 308                                    struct ieee80211_channel *chan)
 309 {
 310         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 311                     chan->center_freq);
 312
 313         if (chan->flags & IEEE80211_CHAN_DISABLED)
 314                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 315         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 316                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 317         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 318                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 319         if (chan->flags & IEEE80211_CHAN_RADAR)
 320                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 321
 322         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 323                     DBM_TO_MBM(chan->max_power));
 324
 325         return 0;
 326
 327  nla_put_failure:
 328         return -ENOBUFS;
 329 }
 330
 331 /* netlink command implementations */
 332
 333 struct key_parse {
 334         struct key_params p;
 335         int idx;
 336         int type;
 337         bool def, defmgmt;
 338         bool def_uni, def_multi;
 339 };
 340
 341 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 342 {
 343         struct nlattr *tb[NL80211_KEY_MAX + 1];
 344         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 345                                    nl80211_key_policy);
 346         if (err)
 347                 return err;
 348
 349         k->def = !!tb[NL80211_KEY_DEFAULT];
 350         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 351
 352         if (k->def) {
 353                 k->def_uni = true;
 354                 k->def_multi = true;
 355         }
 356         if (k->defmgmt)
 357                 k->def_multi = true;
 358
 359         if (tb[NL80211_KEY_IDX])
 360                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 361
 362         if (tb[NL80211_KEY_DATA]) {
 363                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 364                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 365         }
 366
 367         if (tb[NL80211_KEY_SEQ]) {
 368                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 369                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 370         }
 371
 372         if (tb[NL80211_KEY_CIPHER])
 373                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 374
 375         if (tb[NL80211_KEY_TYPE]) {
 376                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 377                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 378                         return -EINVAL;
 379         }
 380
 381         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 382                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 383                 int err = nla_parse_nested(kdt,
 384                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 385                                            tb[NL80211_KEY_DEFAULT_TYPES],
 386                                            nl80211_key_default_policy);
 387                 if (err)
 388                         return err;
 389
 390                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 391                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 398 {
 399         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 400                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 401                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 402         }
 403
 404         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 405                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 406                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 407         }
 408
 409         if (info->attrs[NL80211_ATTR_KEY_IDX])
 410                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 411
 412         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 413                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 414
 415         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 416         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 417
 418         if (k->def) {
 419                 k->def_uni = true;
 420                 k->def_multi = true;
 421         }
 422         if (k->defmgmt)
 423                 k->def_multi = true;
 424
 425         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 426                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 427                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 428                         return -EINVAL;
 429         }
 430
 431         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 432                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 433                 int err = nla_parse_nested(
 434                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 435                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 436                                 nl80211_key_default_policy);
 437                 if (err)
 438                         return err;
 439
 440                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 441                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 442         }
 443
 444         return 0;
 445 }
 446
 447 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 448 {
 449         int err;
 450
 451         memset(k, 0, sizeof(*k));
 452         k->idx = -1;
 453         k->type = -1;
 454
 455         if (info->attrs[NL80211_ATTR_KEY])
 456                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 457         else
 458                 err = nl80211_parse_key_old(info, k);
 459
 460         if (err)
 461                 return err;
 462
 463         if (k->def && k->defmgmt)
 464                 return -EINVAL;
 465
 466         if (k->defmgmt) {
 467                 if (k->def_uni || !k->def_multi)
 468                         return -EINVAL;
 469         }
 470
 471         if (k->idx != -1) {
 472                 if (k->defmgmt) {
 473                         if (k->idx < 4 || k->idx > 5)
 474                                 return -EINVAL;
 475                 } else if (k->def) {
 476                         if (k->idx < 0 || k->idx > 3)
 477                                 return -EINVAL;
 478                 } else {
 479                         if (k->idx < 0 || k->idx > 5)
 480                                 return -EINVAL;
 481                 }
 482         }
 483
 484         return 0;
 485 }
 486
 487 static struct cfg80211_cached_keys *
 488 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 489                        struct nlattr *keys)
 490 {
 491         struct key_parse parse;
 492         struct nlattr *key;
 493         struct cfg80211_cached_keys *result;
 494         int rem, err, def = 0;
 495
 496         result = kzalloc(sizeof(*result), GFP_KERNEL);
 497         if (!result)
 498                 return ERR_PTR(-ENOMEM);
 499
 500         result->def = -1;
 501         result->defmgmt = -1;
 502
 503         nla_for_each_nested(key, keys, rem) {
 504                 memset(&parse, 0, sizeof(parse));
 505                 parse.idx = -1;
 506
 507                 err = nl80211_parse_key_new(key, &parse);
 508                 if (err)
 509                         goto error;
 510                 err = -EINVAL;
 511                 if (!parse.p.key)
 512                         goto error;
 513                 if (parse.idx < 0 || parse.idx > 4)
 514                         goto error;
 515                 if (parse.def) {
 516                         if (def)
 517                                 goto error;
 518                         def = 1;
 519                         result->def = parse.idx;
 520                         if (!parse.def_uni || !parse.def_multi)
 521                                 goto error;
 522                 } else if (parse.defmgmt)
 523                         goto error;
 524                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 525                                                      parse.idx, false, NULL);
 526                 if (err)
 527                         goto error;
 528                 result->params[parse.idx].cipher = parse.p.cipher;
 529                 result->params[parse.idx].key_len = parse.p.key_len;
 530                 result->params[parse.idx].key = result->data[parse.idx];
 531                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 532         }
 533
 534         return result;
 535  error:
 536         kfree(result);
 537         return ERR_PTR(err);
 538 }
 539
 540 static int nl80211_key_allowed(struct wireless_dev *wdev)
 541 {
 542         ASSERT_WDEV_LOCK(wdev);
 543
 544         switch (wdev->iftype) {
 545         case NL80211_IFTYPE_AP:
 546         case NL80211_IFTYPE_AP_VLAN:
 547         case NL80211_IFTYPE_P2P_GO:
 548         case NL80211_IFTYPE_MESH_POINT:
 549                 break;
 550         case NL80211_IFTYPE_ADHOC:
 551                 if (!wdev->current_bss)
 552                         return -ENOLINK;
 553                 break;
 554         case NL80211_IFTYPE_STATION:
 555         case NL80211_IFTYPE_P2P_CLIENT:
 556                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 557                         return -ENOLINK;
 558                 break;
 559         default:
 560                 return -EINVAL;
 561         }
 562
 563         return 0;
 564 }
 565
 566 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 567                               struct cfg80211_registered_device *dev)
 568 {
 569         void *hdr;
 570         struct nlattr *nl_bands, *nl_band;
 571         struct nlattr *nl_freqs, *nl_freq;
 572         struct nlattr *nl_rates, *nl_rate;
 573         struct nlattr *nl_modes;
 574         struct nlattr *nl_cmds;
 575         enum ieee80211_band band;
 576         struct ieee80211_channel *chan;
 577         struct ieee80211_rate *rate;
 578         int i;
 579         u16 ifmodes = dev->wiphy.interface_modes;
 580         const struct ieee80211_txrx_stypes *mgmt_stypes =
 581                                 dev->wiphy.mgmt_stypes;
 582
 583         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 584         if (!hdr)
 585                 return -1;
 586
 587         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 588         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 589
 590         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 591                     cfg80211_rdev_list_generation);
 592
 593         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 594                    dev->wiphy.retry_short);
 595         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 596                    dev->wiphy.retry_long);
 597         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 598                     dev->wiphy.frag_threshold);
 599         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 600                     dev->wiphy.rts_threshold);
 601         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 602                     dev->wiphy.coverage_class);
 603         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 604                    dev->wiphy.max_scan_ssids);
 605         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 606                     dev->wiphy.max_scan_ie_len);
 607
 608         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 609                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 610         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 611                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 612
 613         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 614                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 615                 dev->wiphy.cipher_suites);
 616
 617         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 618                    dev->wiphy.max_num_pmkids);
 619
 620         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 621                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 622
 623         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 624                     dev->wiphy.available_antennas_tx);
 625         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 626                     dev->wiphy.available_antennas_rx);
 627
 628         if ((dev->wiphy.available_antennas_tx ||
 629              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 630                 u32 tx_ant = 0, rx_ant = 0;
 631                 int res;
 632                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 633                 if (!res) {
 634                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 635                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 636                 }
 637         }
 638
 639         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 640         if (!nl_modes)
 641                 goto nla_put_failure;
 642
 643         i = 0;
 644         while (ifmodes) {
 645                 if (ifmodes & 1)
 646                         NLA_PUT_FLAG(msg, i);
 647                 ifmodes >>= 1;
 648                 i++;
 649         }
 650
 651         nla_nest_end(msg, nl_modes);
 652
 653         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 654         if (!nl_bands)
 655                 goto nla_put_failure;
 656
 657         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 658                 if (!dev->wiphy.bands[band])
 659                         continue;
 660
 661                 nl_band = nla_nest_start(msg, band);
 662                 if (!nl_band)
 663                         goto nla_put_failure;
 664
 665                 /* add HT info */
 666                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 667                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 668                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 669                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 670                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 671                                 dev->wiphy.bands[band]->ht_cap.cap);
 672                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 673                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 674                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 675                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 676                 }
 677
 678                 /* add frequencies */
 679                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 680                 if (!nl_freqs)
 681                         goto nla_put_failure;
 682
 683                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 684                         nl_freq = nla_nest_start(msg, i);
 685                         if (!nl_freq)
 686                                 goto nla_put_failure;
 687
 688                         chan = &dev->wiphy.bands[band]->channels[i];
 689
 690                         if (nl80211_msg_put_channel(msg, chan))
 691                                 goto nla_put_failure;
 692
 693                         nla_nest_end(msg, nl_freq);
 694                 }
 695
 696                 nla_nest_end(msg, nl_freqs);
 697
 698                 /* add bitrates */
 699                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 700                 if (!nl_rates)
 701                         goto nla_put_failure;
 702
 703                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 704                         nl_rate = nla_nest_start(msg, i);
 705                         if (!nl_rate)
 706                                 goto nla_put_failure;
 707
 708                         rate = &dev->wiphy.bands[band]->bitrates[i];
 709                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 710                                     rate->bitrate);
 711                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 712                                 NLA_PUT_FLAG(msg,
 713                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 714
 715                         nla_nest_end(msg, nl_rate);
 716                 }
 717
 718                 nla_nest_end(msg, nl_rates);
 719
 720                 nla_nest_end(msg, nl_band);
 721         }
 722         nla_nest_end(msg, nl_bands);
 723
 724         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 725         if (!nl_cmds)
 726                 goto nla_put_failure;
 727
 728         i = 0;
 729 #define CMD(op, n)                                              \
 730          do {                                                   \
 731                 if (dev->ops->op) {                             \
 732                         i++;                                    \
 733                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 734                 }                                               \
 735         } while (0)
 736
 737         CMD(add_virtual_intf, NEW_INTERFACE);
 738         CMD(change_virtual_intf, SET_INTERFACE);
 739         CMD(add_key, NEW_KEY);
 740         CMD(add_beacon, NEW_BEACON);
 741         CMD(add_station, NEW_STATION);
 742         CMD(add_mpath, NEW_MPATH);
 743         CMD(update_mesh_config, SET_MESH_CONFIG);
 744         CMD(change_bss, SET_BSS);
 745         CMD(auth, AUTHENTICATE);
 746         CMD(assoc, ASSOCIATE);
 747         CMD(deauth, DEAUTHENTICATE);
 748         CMD(disassoc, DISASSOCIATE);
 749         CMD(join_ibss, JOIN_IBSS);
 750         CMD(join_mesh, JOIN_MESH);
 751         CMD(set_pmksa, SET_PMKSA);
 752         CMD(del_pmksa, DEL_PMKSA);
 753         CMD(flush_pmksa, FLUSH_PMKSA);
 754         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 755         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 756         CMD(mgmt_tx, FRAME);
 757         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 758         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 759                 i++;
 760                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 761         }
 762         CMD(set_channel, SET_CHANNEL);
 763         CMD(set_wds_peer, SET_WDS_PEER);
 764         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 765                 CMD(sched_scan_start, START_SCHED_SCAN);
 766
 767 #undef CMD
 768
 769         if (dev->ops->connect || dev->ops->auth) {
 770                 i++;
 771                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 772         }
 773
 774         if (dev->ops->disconnect || dev->ops->deauth) {
 775                 i++;
 776                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 777         }
 778
 779         nla_nest_end(msg, nl_cmds);
 780
 781         if (dev->ops->remain_on_channel)
 782                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 783                             dev->wiphy.max_remain_on_channel_duration);
 784
 785         /* for now at least assume all drivers have it */
 786         if (dev->ops->mgmt_tx)
 787                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 788
 789         if (mgmt_stypes) {
 790                 u16 stypes;
 791                 struct nlattr *nl_ftypes, *nl_ifs;
 792                 enum nl80211_iftype ift;
 793
 794                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 795                 if (!nl_ifs)
 796                         goto nla_put_failure;
 797
 798                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 799                         nl_ftypes = nla_nest_start(msg, ift);
 800                         if (!nl_ftypes)
 801                                 goto nla_put_failure;
 802                         i = 0;
 803                         stypes = mgmt_stypes[ift].tx;
 804                         while (stypes) {
 805                                 if (stypes & 1)
 806                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 807                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 808                                 stypes >>= 1;
 809                                 i++;
 810                         }
 811                         nla_nest_end(msg, nl_ftypes);
 812                 }
 813
 814                 nla_nest_end(msg, nl_ifs);
 815
 816                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 817                 if (!nl_ifs)
 818                         goto nla_put_failure;
 819
 820                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 821                         nl_ftypes = nla_nest_start(msg, ift);
 822                         if (!nl_ftypes)
 823                                 goto nla_put_failure;
 824                         i = 0;
 825                         stypes = mgmt_stypes[ift].rx;
 826                         while (stypes) {
 827                                 if (stypes & 1)
 828                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 829                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 830                                 stypes >>= 1;
 831                                 i++;
 832                         }
 833                         nla_nest_end(msg, nl_ftypes);
 834                 }
 835                 nla_nest_end(msg, nl_ifs);
 836         }
 837
 838         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 839                 struct nlattr *nl_wowlan;
 840
 841                 nl_wowlan = nla_nest_start(msg,
 842                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 843                 if (!nl_wowlan)
 844                         goto nla_put_failure;
 845
 846                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 847                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 848                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
 849                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 850                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
 851                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
 852                 if (dev->wiphy.wowlan.n_patterns) {
 853                         struct nl80211_wowlan_pattern_support pat = {
 854                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
 855                                 .min_pattern_len =
 856                                         dev->wiphy.wowlan.pattern_min_len,
 857                                 .max_pattern_len =
 858                                         dev->wiphy.wowlan.pattern_max_len,
 859                         };
 860                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 861                                 sizeof(pat), &pat);
 862                 }
 863
 864                 nla_nest_end(msg, nl_wowlan);
 865         }
 866
 867         return genlmsg_end(msg, hdr);
 868
 869  nla_put_failure:
 870         genlmsg_cancel(msg, hdr);
 871         return -EMSGSIZE;
 872 }
 873
 874 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 875 {
 876         int idx = 0;
 877         int start = cb->args[0];
 878         struct cfg80211_registered_device *dev;
 879
 880         mutex_lock(&cfg80211_mutex);
 881         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 882                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 883                         continue;
 884                 if (++idx <= start)
 885                         continue;
 886                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 887                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 888                                        dev) < 0) {
 889                         idx--;
 890                         break;
 891                 }
 892         }
 893         mutex_unlock(&cfg80211_mutex);
 894
 895         cb->args[0] = idx;
 896
 897         return skb->len;
 898 }
 899
 900 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 901 {
 902         struct sk_buff *msg;
 903         struct cfg80211_registered_device *dev = info->user_ptr[0];
 904
 905         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 906         if (!msg)
 907                 return -ENOMEM;
 908
 909         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 910                 nlmsg_free(msg);
 911                 return -ENOBUFS;
 912         }
 913
 914         return genlmsg_reply(msg, info);
 915 }
 916
 917 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 918         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 919         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 920         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 921         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 922         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 923 };
 924
 925 static int parse_txq_params(struct nlattr *tb[],
 926                             struct ieee80211_txq_params *txq_params)
 927 {
 928         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 929             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 930             !tb[NL80211_TXQ_ATTR_AIFS])
 931                 return -EINVAL;
 932
 933         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 934         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 935         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 936         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 937         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 938
 939         return 0;
 940 }
 941
 942 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 943 {
 944         /*
 945          * You can only set the channel explicitly for AP, mesh
 946          * and WDS type interfaces; all others have their channel
 947          * managed via their respective "establish a connection"
 948          * command (connect, join, ...)
 949          *
 950          * Monitors are special as they are normally slaved to
 951          * whatever else is going on, so they behave as though
 952          * you tried setting the wiphy channel itself.
 953          */
 954         return !wdev ||
 955                 wdev->iftype == NL80211_IFTYPE_AP ||
 956                 wdev->iftype == NL80211_IFTYPE_WDS ||
 957                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 958                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
 959                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
 960 }
 961
 962 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 963                                  struct wireless_dev *wdev,
 964                                  struct genl_info *info)
 965 {
 966         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 967         u32 freq;
 968         int result;
 969
 970         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 971                 return -EINVAL;
 972
 973         if (!nl80211_can_set_dev_channel(wdev))
 974                 return -EOPNOTSUPP;
 975
 976         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 977                 channel_type = nla_get_u32(info->attrs[
 978                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 979                 if (channel_type != NL80211_CHAN_NO_HT &&
 980                     channel_type != NL80211_CHAN_HT20 &&
 981                     channel_type != NL80211_CHAN_HT40PLUS &&
 982                     channel_type != NL80211_CHAN_HT40MINUS)
 983                         return -EINVAL;
 984         }
 985
 986         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 987
 988         mutex_lock(&rdev->devlist_mtx);
 989         if (wdev) {
 990                 wdev_lock(wdev);
 991                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 992                 wdev_unlock(wdev);
 993         } else {
 994                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 995         }
 996         mutex_unlock(&rdev->devlist_mtx);
 997
 998         return result;
 999 }
1000
1001 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1002 {
1003         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1004         struct net_device *netdev = info->user_ptr[1];
1005
1006         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1007 }
1008
1009 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1010 {
1011         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1012         struct net_device *dev = info->user_ptr[1];
1013         struct wireless_dev *wdev = dev->ieee80211_ptr;
1014         const u8 *bssid;
1015
1016         if (!info->attrs[NL80211_ATTR_MAC])
1017                 return -EINVAL;
1018
1019         if (netif_running(dev))
1020                 return -EBUSY;
1021
1022         if (!rdev->ops->set_wds_peer)
1023                 return -EOPNOTSUPP;
1024
1025         if (wdev->iftype != NL80211_IFTYPE_WDS)
1026                 return -EOPNOTSUPP;
1027
1028         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1029         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1030 }
1031
1032
1033 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1034 {
1035         struct cfg80211_registered_device *rdev;
1036         struct net_device *netdev = NULL;
1037         struct wireless_dev *wdev;
1038         int result = 0, rem_txq_params = 0;
1039         struct nlattr *nl_txq_params;
1040         u32 changed;
1041         u8 retry_short = 0, retry_long = 0;
1042         u32 frag_threshold = 0, rts_threshold = 0;
1043         u8 coverage_class = 0;
1044
1045         /*
1046          * Try to find the wiphy and netdev. Normally this
1047          * function shouldn't need the netdev, but this is
1048          * done for backward compatibility -- previously
1049          * setting the channel was done per wiphy, but now
1050          * it is per netdev. Previous userland like hostapd
1051          * also passed a netdev to set_wiphy, so that it is
1052          * possible to let that go to the right netdev!
1053          */
1054         mutex_lock(&cfg80211_mutex);
1055
1056         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1057                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1058
1059                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1060                 if (netdev && netdev->ieee80211_ptr) {
1061                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1062                         mutex_lock(&rdev->mtx);
1063                 } else
1064                         netdev = NULL;
1065         }
1066
1067         if (!netdev) {
1068                 rdev = __cfg80211_rdev_from_info(info);
1069                 if (IS_ERR(rdev)) {
1070                         mutex_unlock(&cfg80211_mutex);
1071                         return PTR_ERR(rdev);
1072                 }
1073                 wdev = NULL;
1074                 netdev = NULL;
1075                 result = 0;
1076
1077                 mutex_lock(&rdev->mtx);
1078         } else if (netif_running(netdev) &&
1079                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1080                 wdev = netdev->ieee80211_ptr;
1081         else
1082                 wdev = NULL;
1083
1084         /*
1085          * end workaround code, by now the rdev is available
1086          * and locked, and wdev may or may not be NULL.
1087          */
1088
1089         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1090                 result = cfg80211_dev_rename(
1091                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1092
1093         mutex_unlock(&cfg80211_mutex);
1094
1095         if (result)
1096                 goto bad_res;
1097
1098         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1099                 struct ieee80211_txq_params txq_params;
1100                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1101
1102                 if (!rdev->ops->set_txq_params) {
1103                         result = -EOPNOTSUPP;
1104                         goto bad_res;
1105                 }
1106
1107                 nla_for_each_nested(nl_txq_params,
1108                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1109                                     rem_txq_params) {
1110                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1111                                   nla_data(nl_txq_params),
1112                                   nla_len(nl_txq_params),
1113                                   txq_params_policy);
1114                         result = parse_txq_params(tb, &txq_params);
1115                         if (result)
1116                                 goto bad_res;
1117
1118                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1119                                                            &txq_params);
1120                         if (result)
1121                                 goto bad_res;
1122                 }
1123         }
1124
1125         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1126                 result = __nl80211_set_channel(rdev, wdev, info);
1127                 if (result)
1128                         goto bad_res;
1129         }
1130
1131         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1132                 enum nl80211_tx_power_setting type;
1133                 int idx, mbm = 0;
1134
1135                 if (!rdev->ops->set_tx_power) {
1136                         result = -EOPNOTSUPP;
1137                         goto bad_res;
1138                 }
1139
1140                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1141                 type = nla_get_u32(info->attrs[idx]);
1142
1143                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1144                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1145                         result = -EINVAL;
1146                         goto bad_res;
1147                 }
1148
1149                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1150                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1151                         mbm = nla_get_u32(info->attrs[idx]);
1152                 }
1153
1154                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1155                 if (result)
1156                         goto bad_res;
1157         }
1158
1159         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1160             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1161                 u32 tx_ant, rx_ant;
1162                 if ((!rdev->wiphy.available_antennas_tx &&
1163                      !rdev->wiphy.available_antennas_rx) ||
1164                     !rdev->ops->set_antenna) {
1165                         result = -EOPNOTSUPP;
1166                         goto bad_res;
1167                 }
1168
1169                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1170                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1171
1172                 /* reject antenna configurations which don't match the
1173                  * available antenna masks, except for the "all" mask */
1174                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1175                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1176                         result = -EINVAL;
1177                         goto bad_res;
1178                 }
1179
1180                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1181                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1182
1183                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1184                 if (result)
1185                         goto bad_res;
1186         }
1187
1188         changed = 0;
1189
1190         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1191                 retry_short = nla_get_u8(
1192                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1193                 if (retry_short == 0) {
1194                         result = -EINVAL;
1195                         goto bad_res;
1196                 }
1197                 changed |= WIPHY_PARAM_RETRY_SHORT;
1198         }
1199
1200         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1201                 retry_long = nla_get_u8(
1202                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1203                 if (retry_long == 0) {
1204                         result = -EINVAL;
1205                         goto bad_res;
1206                 }
1207                 changed |= WIPHY_PARAM_RETRY_LONG;
1208         }
1209
1210         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1211                 frag_threshold = nla_get_u32(
1212                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1213                 if (frag_threshold < 256) {
1214                         result = -EINVAL;
1215                         goto bad_res;
1216                 }
1217                 if (frag_threshold != (u32) -1) {
1218                         /*
1219                          * Fragments (apart from the last one) are required to
1220                          * have even length. Make the fragmentation code
1221                          * simpler by stripping LSB should someone try to use
1222                          * odd threshold value.
1223                          */
1224                         frag_threshold &= ~0x1;
1225                 }
1226                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1227         }
1228
1229         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1230                 rts_threshold = nla_get_u32(
1231                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1232                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1233         }
1234
1235         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1236                 coverage_class = nla_get_u8(
1237                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1238                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1239         }
1240
1241         if (changed) {
1242                 u8 old_retry_short, old_retry_long;
1243                 u32 old_frag_threshold, old_rts_threshold;
1244                 u8 old_coverage_class;
1245
1246                 if (!rdev->ops->set_wiphy_params) {
1247                         result = -EOPNOTSUPP;
1248                         goto bad_res;
1249                 }
1250
1251                 old_retry_short = rdev->wiphy.retry_short;
1252                 old_retry_long = rdev->wiphy.retry_long;
1253                 old_frag_threshold = rdev->wiphy.frag_threshold;
1254                 old_rts_threshold = rdev->wiphy.rts_threshold;
1255                 old_coverage_class = rdev->wiphy.coverage_class;
1256
1257                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1258                         rdev->wiphy.retry_short = retry_short;
1259                 if (changed & WIPHY_PARAM_RETRY_LONG)
1260                         rdev->wiphy.retry_long = retry_long;
1261                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1262                         rdev->wiphy.frag_threshold = frag_threshold;
1263                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1264                         rdev->wiphy.rts_threshold = rts_threshold;
1265                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1266                         rdev->wiphy.coverage_class = coverage_class;
1267
1268                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1269                 if (result) {
1270                         rdev->wiphy.retry_short = old_retry_short;
1271                         rdev->wiphy.retry_long = old_retry_long;
1272                         rdev->wiphy.frag_threshold = old_frag_threshold;
1273                         rdev->wiphy.rts_threshold = old_rts_threshold;
1274                         rdev->wiphy.coverage_class = old_coverage_class;
1275                 }
1276         }
1277
1278  bad_res:
1279         mutex_unlock(&rdev->mtx);
1280         if (netdev)
1281                 dev_put(netdev);
1282         return result;
1283 }
1284
1285
1286 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1287                               struct cfg80211_registered_device *rdev,
1288                               struct net_device *dev)
1289 {
1290         void *hdr;
1291
1292         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1293         if (!hdr)
1294                 return -1;
1295
1296         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1297         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1298         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1299         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1300
1301         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1302                     rdev->devlist_generation ^
1303                         (cfg80211_rdev_list_generation << 2));
1304
1305         return genlmsg_end(msg, hdr);
1306
1307  nla_put_failure:
1308         genlmsg_cancel(msg, hdr);
1309         return -EMSGSIZE;
1310 }
1311
1312 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1313 {
1314         int wp_idx = 0;
1315         int if_idx = 0;
1316         int wp_start = cb->args[0];
1317         int if_start = cb->args[1];
1318         struct cfg80211_registered_device *rdev;
1319         struct wireless_dev *wdev;
1320
1321         mutex_lock(&cfg80211_mutex);
1322         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1323                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1324                         continue;
1325                 if (wp_idx < wp_start) {
1326                         wp_idx++;
1327                         continue;
1328                 }
1329                 if_idx = 0;
1330
1331                 mutex_lock(&rdev->devlist_mtx);
1332                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1333                         if (if_idx < if_start) {
1334                                 if_idx++;
1335                                 continue;
1336                         }
1337                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1338                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1339                                                rdev, wdev->netdev) < 0) {
1340                                 mutex_unlock(&rdev->devlist_mtx);
1341                                 goto out;
1342                         }
1343                         if_idx++;
1344                 }
1345                 mutex_unlock(&rdev->devlist_mtx);
1346
1347                 wp_idx++;
1348         }
1349  out:
1350         mutex_unlock(&cfg80211_mutex);
1351
1352         cb->args[0] = wp_idx;
1353         cb->args[1] = if_idx;
1354
1355         return skb->len;
1356 }
1357
1358 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1359 {
1360         struct sk_buff *msg;
1361         struct cfg80211_registered_device *dev = info->user_ptr[0];
1362         struct net_device *netdev = info->user_ptr[1];
1363
1364         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1365         if (!msg)
1366                 return -ENOMEM;
1367
1368         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1369                                dev, netdev) < 0) {
1370                 nlmsg_free(msg);
1371                 return -ENOBUFS;
1372         }
1373
1374         return genlmsg_reply(msg, info);
1375 }
1376
1377 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1378         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1379         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1380         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1381         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1382         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1383 };
1384
1385 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1386 {
1387         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1388         int flag;
1389
1390         *mntrflags = 0;
1391
1392         if (!nla)
1393                 return -EINVAL;
1394
1395         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1396                              nla, mntr_flags_policy))
1397                 return -EINVAL;
1398
1399         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1400                 if (flags[flag])
1401                         *mntrflags |= (1<<flag);
1402
1403         return 0;
1404 }
1405
1406 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1407                                struct net_device *netdev, u8 use_4addr,
1408                                enum nl80211_iftype iftype)
1409 {
1410         if (!use_4addr) {
1411                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1412                         return -EBUSY;
1413                 return 0;
1414         }
1415
1416         switch (iftype) {
1417         case NL80211_IFTYPE_AP_VLAN:
1418                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1419                         return 0;
1420                 break;
1421         case NL80211_IFTYPE_STATION:
1422                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1423                         return 0;
1424                 break;
1425         default:
1426                 break;
1427         }
1428
1429         return -EOPNOTSUPP;
1430 }
1431
1432 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1433 {
1434         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1435         struct vif_params params;
1436         int err;
1437         enum nl80211_iftype otype, ntype;
1438         struct net_device *dev = info->user_ptr[1];
1439         u32 _flags, *flags = NULL;
1440         bool change = false;
1441
1442         memset(&params, 0, sizeof(params));
1443
1444         otype = ntype = dev->ieee80211_ptr->iftype;
1445
1446         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1447                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1448                 if (otype != ntype)
1449                         change = true;
1450                 if (ntype > NL80211_IFTYPE_MAX)
1451                         return -EINVAL;
1452         }
1453
1454         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1455                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1456
1457                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1458                         return -EINVAL;
1459                 if (netif_running(dev))
1460                         return -EBUSY;
1461
1462                 wdev_lock(wdev);
1463                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1464                              IEEE80211_MAX_MESH_ID_LEN);
1465                 wdev->mesh_id_up_len =
1466                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1467                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1468                        wdev->mesh_id_up_len);
1469                 wdev_unlock(wdev);
1470         }
1471
1472         if (info->attrs[NL80211_ATTR_4ADDR]) {
1473                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1474                 change = true;
1475                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1476                 if (err)
1477                         return err;
1478         } else {
1479                 params.use_4addr = -1;
1480         }
1481
1482         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1483                 if (ntype != NL80211_IFTYPE_MONITOR)
1484                         return -EINVAL;
1485                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1486                                           &_flags);
1487                 if (err)
1488                         return err;
1489
1490                 flags = &_flags;
1491                 change = true;
1492         }
1493
1494         if (change)
1495                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1496         else
1497                 err = 0;
1498
1499         if (!err && params.use_4addr != -1)
1500                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1501
1502         return err;
1503 }
1504
1505 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1506 {
1507         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1508         struct vif_params params;
1509         struct net_device *dev;
1510         int err;
1511         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1512         u32 flags;
1513
1514         memset(&params, 0, sizeof(params));
1515
1516         if (!info->attrs[NL80211_ATTR_IFNAME])
1517                 return -EINVAL;
1518
1519         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1520                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1521                 if (type > NL80211_IFTYPE_MAX)
1522                         return -EINVAL;
1523         }
1524
1525         if (!rdev->ops->add_virtual_intf ||
1526             !(rdev->wiphy.interface_modes & (1 << type)))
1527                 return -EOPNOTSUPP;
1528
1529         if (info->attrs[NL80211_ATTR_4ADDR]) {
1530                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1531                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1532                 if (err)
1533                         return err;
1534         }
1535
1536         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1537                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1538                                   &flags);
1539         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1540                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1541                 type, err ? NULL : &flags, &params);
1542         if (IS_ERR(dev))
1543                 return PTR_ERR(dev);
1544
1545         if (type == NL80211_IFTYPE_MESH_POINT &&
1546             info->attrs[NL80211_ATTR_MESH_ID]) {
1547                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1548
1549                 wdev_lock(wdev);
1550                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1551                              IEEE80211_MAX_MESH_ID_LEN);
1552                 wdev->mesh_id_up_len =
1553                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1554                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1555                        wdev->mesh_id_up_len);
1556                 wdev_unlock(wdev);
1557         }
1558
1559         return 0;
1560 }
1561
1562 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1563 {
1564         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1565         struct net_device *dev = info->user_ptr[1];
1566
1567         if (!rdev->ops->del_virtual_intf)
1568                 return -EOPNOTSUPP;
1569
1570         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1571 }
1572
1573 struct get_key_cookie {
1574         struct sk_buff *msg;
1575         int error;
1576         int idx;
1577 };
1578
1579 static void get_key_callback(void *c, struct key_params *params)
1580 {
1581         struct nlattr *key;
1582         struct get_key_cookie *cookie = c;
1583
1584         if (params->key)
1585                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1586                         params->key_len, params->key);
1587
1588         if (params->seq)
1589                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1590                         params->seq_len, params->seq);
1591
1592         if (params->cipher)
1593                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1594                             params->cipher);
1595
1596         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1597         if (!key)
1598                 goto nla_put_failure;
1599
1600         if (params->key)
1601                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1602                         params->key_len, params->key);
1603
1604         if (params->seq)
1605                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1606                         params->seq_len, params->seq);
1607
1608         if (params->cipher)
1609                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1610                             params->cipher);
1611
1612         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1613
1614         nla_nest_end(cookie->msg, key);
1615
1616         return;
1617  nla_put_failure:
1618         cookie->error = 1;
1619 }
1620
1621 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1622 {
1623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1624         int err;
1625         struct net_device *dev = info->user_ptr[1];
1626         u8 key_idx = 0;
1627         const u8 *mac_addr = NULL;
1628         bool pairwise;
1629         struct get_key_cookie cookie = {
1630                 .error = 0,
1631         };
1632         void *hdr;
1633         struct sk_buff *msg;
1634
1635         if (info->attrs[NL80211_ATTR_KEY_IDX])
1636                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1637
1638         if (key_idx > 5)
1639                 return -EINVAL;
1640
1641         if (info->attrs[NL80211_ATTR_MAC])
1642                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1643
1644         pairwise = !!mac_addr;
1645         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1646                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1647                 if (kt >= NUM_NL80211_KEYTYPES)
1648                         return -EINVAL;
1649                 if (kt != NL80211_KEYTYPE_GROUP &&
1650                     kt != NL80211_KEYTYPE_PAIRWISE)
1651                         return -EINVAL;
1652                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1653         }
1654
1655         if (!rdev->ops->get_key)
1656                 return -EOPNOTSUPP;
1657
1658         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1659         if (!msg)
1660                 return -ENOMEM;
1661
1662         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1663                              NL80211_CMD_NEW_KEY);
1664         if (IS_ERR(hdr))
1665                 return PTR_ERR(hdr);
1666
1667         cookie.msg = msg;
1668         cookie.idx = key_idx;
1669
1670         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1671         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1672         if (mac_addr)
1673                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1674
1675         if (pairwise && mac_addr &&
1676             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1677                 return -ENOENT;
1678
1679         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1680                                  mac_addr, &cookie, get_key_callback);
1681
1682         if (err)
1683                 goto free_msg;
1684
1685         if (cookie.error)
1686                 goto nla_put_failure;
1687
1688         genlmsg_end(msg, hdr);
1689         return genlmsg_reply(msg, info);
1690
1691  nla_put_failure:
1692         err = -ENOBUFS;
1693  free_msg:
1694         nlmsg_free(msg);
1695         return err;
1696 }
1697
1698 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1699 {
1700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1701         struct key_parse key;
1702         int err;
1703         struct net_device *dev = info->user_ptr[1];
1704
1705         err = nl80211_parse_key(info, &key);
1706         if (err)
1707                 return err;
1708
1709         if (key.idx < 0)
1710                 return -EINVAL;
1711
1712         /* only support setting default key */
1713         if (!key.def && !key.defmgmt)
1714                 return -EINVAL;
1715
1716         wdev_lock(dev->ieee80211_ptr);
1717
1718         if (key.def) {
1719                 if (!rdev->ops->set_default_key) {
1720                         err = -EOPNOTSUPP;
1721                         goto out;
1722                 }
1723
1724                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1725                 if (err)
1726                         goto out;
1727
1728                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1729                                                  key.def_uni, key.def_multi);
1730
1731                 if (err)
1732                         goto out;
1733
1734 #ifdef CONFIG_CFG80211_WEXT
1735                 dev->ieee80211_ptr->wext.default_key = key.idx;
1736 #endif
1737         } else {
1738                 if (key.def_uni || !key.def_multi) {
1739                         err = -EINVAL;
1740                         goto out;
1741                 }
1742
1743                 if (!rdev->ops->set_default_mgmt_key) {
1744                         err = -EOPNOTSUPP;
1745                         goto out;
1746                 }
1747
1748                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1749                 if (err)
1750                         goto out;
1751
1752                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1753                                                       dev, key.idx);
1754                 if (err)
1755                         goto out;
1756
1757 #ifdef CONFIG_CFG80211_WEXT
1758                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1759 #endif
1760         }
1761
1762  out:
1763         wdev_unlock(dev->ieee80211_ptr);
1764
1765         return err;
1766 }
1767
1768 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1769 {
1770         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1771         int err;
1772         struct net_device *dev = info->user_ptr[1];
1773         struct key_parse key;
1774         const u8 *mac_addr = NULL;
1775
1776         err = nl80211_parse_key(info, &key);
1777         if (err)
1778                 return err;
1779
1780         if (!key.p.key)
1781                 return -EINVAL;
1782
1783         if (info->attrs[NL80211_ATTR_MAC])
1784                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1785
1786         if (key.type == -1) {
1787                 if (mac_addr)
1788                         key.type = NL80211_KEYTYPE_PAIRWISE;
1789                 else
1790                         key.type = NL80211_KEYTYPE_GROUP;
1791         }
1792
1793         /* for now */
1794         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1795             key.type != NL80211_KEYTYPE_GROUP)
1796                 return -EINVAL;
1797
1798         if (!rdev->ops->add_key)
1799                 return -EOPNOTSUPP;
1800
1801         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1802                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1803                                            mac_addr))
1804                 return -EINVAL;
1805
1806         wdev_lock(dev->ieee80211_ptr);
1807         err = nl80211_key_allowed(dev->ieee80211_ptr);
1808         if (!err)
1809                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1810                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1811                                          mac_addr, &key.p);
1812         wdev_unlock(dev->ieee80211_ptr);
1813
1814         return err;
1815 }
1816
1817 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1818 {
1819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1820         int err;
1821         struct net_device *dev = info->user_ptr[1];
1822         u8 *mac_addr = NULL;
1823         struct key_parse key;
1824
1825         err = nl80211_parse_key(info, &key);
1826         if (err)
1827                 return err;
1828
1829         if (info->attrs[NL80211_ATTR_MAC])
1830                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1831
1832         if (key.type == -1) {
1833                 if (mac_addr)
1834                         key.type = NL80211_KEYTYPE_PAIRWISE;
1835                 else
1836                         key.type = NL80211_KEYTYPE_GROUP;
1837         }
1838
1839         /* for now */
1840         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1841             key.type != NL80211_KEYTYPE_GROUP)
1842                 return -EINVAL;
1843
1844         if (!rdev->ops->del_key)
1845                 return -EOPNOTSUPP;
1846
1847         wdev_lock(dev->ieee80211_ptr);
1848         err = nl80211_key_allowed(dev->ieee80211_ptr);
1849
1850         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1851             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1852                 err = -ENOENT;
1853
1854         if (!err)
1855                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1856                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1857                                          mac_addr);
1858
1859 #ifdef CONFIG_CFG80211_WEXT
1860         if (!err) {
1861                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1862                         dev->ieee80211_ptr->wext.default_key = -1;
1863                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1864                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1865         }
1866 #endif
1867         wdev_unlock(dev->ieee80211_ptr);
1868
1869         return err;
1870 }
1871
1872 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1873 {
1874         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1875                     struct beacon_parameters *info);
1876         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1877         struct net_device *dev = info->user_ptr[1];
1878         struct beacon_parameters params;
1879         int haveinfo = 0;
1880
1881         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1882                 return -EINVAL;
1883
1884         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1885             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1886                 return -EOPNOTSUPP;
1887
1888         switch (info->genlhdr->cmd) {
1889         case NL80211_CMD_NEW_BEACON:
1890                 /* these are required for NEW_BEACON */
1891                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1892                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1893                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1894                         return -EINVAL;
1895
1896                 call = rdev->ops->add_beacon;
1897                 break;
1898         case NL80211_CMD_SET_BEACON:
1899                 call = rdev->ops->set_beacon;
1900                 break;
1901         default:
1902                 WARN_ON(1);
1903                 return -EOPNOTSUPP;
1904         }
1905
1906         if (!call)
1907                 return -EOPNOTSUPP;
1908
1909         memset(&params, 0, sizeof(params));
1910
1911         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1912                 params.interval =
1913                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1914                 haveinfo = 1;
1915         }
1916
1917         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1918                 params.dtim_period =
1919                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1920                 haveinfo = 1;
1921         }
1922
1923         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1924                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1925                 params.head_len =
1926                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1927                 haveinfo = 1;
1928         }
1929
1930         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1931                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1932                 params.tail_len =
1933                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1934                 haveinfo = 1;
1935         }
1936
1937         if (!haveinfo)
1938                 return -EINVAL;
1939
1940         return call(&rdev->wiphy, dev, &params);
1941 }
1942
1943 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1944 {
1945         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1946         struct net_device *dev = info->user_ptr[1];
1947
1948         if (!rdev->ops->del_beacon)
1949                 return -EOPNOTSUPP;
1950
1951         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1952             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1953                 return -EOPNOTSUPP;
1954
1955         return rdev->ops->del_beacon(&rdev->wiphy, dev);
1956 }
1957
1958 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1959         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1960         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1961         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1962         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1963         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
1964 };
1965
1966 static int parse_station_flags(struct genl_info *info,
1967                                struct station_parameters *params)
1968 {
1969         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1970         struct nlattr *nla;
1971         int flag;
1972
1973         /*
1974          * Try parsing the new attribute first so userspace
1975          * can specify both for older kernels.
1976          */
1977         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1978         if (nla) {
1979                 struct nl80211_sta_flag_update *sta_flags;
1980
1981                 sta_flags = nla_data(nla);
1982                 params->sta_flags_mask = sta_flags->mask;
1983                 params->sta_flags_set = sta_flags->set;
1984                 if ((params->sta_flags_mask |
1985                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1986                         return -EINVAL;
1987                 return 0;
1988         }
1989
1990         /* if present, parse the old attribute */
1991
1992         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1993         if (!nla)
1994                 return 0;
1995
1996         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1997                              nla, sta_flags_policy))
1998                 return -EINVAL;
1999
2000         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
2001         params->sta_flags_mask &= ~1;
2002
2003         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2004                 if (flags[flag])
2005                         params->sta_flags_set |= (1<<flag);
2006
2007         return 0;
2008 }
2009
2010 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2011                                  int attr)
2012 {
2013         struct nlattr *rate;
2014         u16 bitrate;
2015
2016         rate = nla_nest_start(msg, attr);
2017         if (!rate)
2018                 goto nla_put_failure;
2019
2020         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2021         bitrate = cfg80211_calculate_bitrate(info);
2022         if (bitrate > 0)
2023                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2024
2025         if (info->flags & RATE_INFO_FLAGS_MCS)
2026                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2027         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2028                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2029         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2030                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2031
2032         nla_nest_end(msg, rate);
2033         return true;
2034
2035 nla_put_failure:
2036         return false;
2037 }
2038
2039 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2040                                 int flags, struct net_device *dev,
2041                                 const u8 *mac_addr, struct station_info *sinfo)
2042 {
2043         void *hdr;
2044         struct nlattr *sinfoattr, *bss_param;
2045
2046         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2047         if (!hdr)
2048                 return -1;
2049
2050         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2051         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2052
2053         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2054
2055         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2056         if (!sinfoattr)
2057                 goto nla_put_failure;
2058         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2059                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2060                             sinfo->connected_time);
2061         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2062                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2063                             sinfo->inactive_time);
2064         if (sinfo->filled & STATION_INFO_RX_BYTES)
2065                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2066                             sinfo->rx_bytes);
2067         if (sinfo->filled & STATION_INFO_TX_BYTES)
2068                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2069                             sinfo->tx_bytes);
2070         if (sinfo->filled & STATION_INFO_LLID)
2071                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2072                             sinfo->llid);
2073         if (sinfo->filled & STATION_INFO_PLID)
2074                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2075                             sinfo->plid);
2076         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2077                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2078                             sinfo->plink_state);
2079         if (sinfo->filled & STATION_INFO_SIGNAL)
2080                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2081                            sinfo->signal);
2082         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2083                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2084                            sinfo->signal_avg);
2085         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2086                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2087                                           NL80211_STA_INFO_TX_BITRATE))
2088                         goto nla_put_failure;
2089         }
2090         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2091                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2092                                           NL80211_STA_INFO_RX_BITRATE))
2093                         goto nla_put_failure;
2094         }
2095         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2096                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2097                             sinfo->rx_packets);
2098         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2099                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2100                             sinfo->tx_packets);
2101         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2102                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2103                             sinfo->tx_retries);
2104         if (sinfo->filled & STATION_INFO_TX_FAILED)
2105                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2106                             sinfo->tx_failed);
2107         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2108                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2109                 if (!bss_param)
2110                         goto nla_put_failure;
2111
2112                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2113                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2114                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2115                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2116                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2117                         NLA_PUT_FLAG(msg,
2118                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2119                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2120                            sinfo->bss_param.dtim_period);
2121                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2122                             sinfo->bss_param.beacon_interval);
2123
2124                 nla_nest_end(msg, bss_param);
2125         }
2126         nla_nest_end(msg, sinfoattr);
2127
2128         return genlmsg_end(msg, hdr);
2129
2130  nla_put_failure:
2131         genlmsg_cancel(msg, hdr);
2132         return -EMSGSIZE;
2133 }
2134
2135 static int nl80211_dump_station(struct sk_buff *skb,
2136                                 struct netlink_callback *cb)
2137 {
2138         struct station_info sinfo;
2139         struct cfg80211_registered_device *dev;
2140         struct net_device *netdev;
2141         u8 mac_addr[ETH_ALEN];
2142         int sta_idx = cb->args[1];
2143         int err;
2144
2145         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2146         if (err)
2147                 return err;
2148
2149         if (!dev->ops->dump_station) {
2150                 err = -EOPNOTSUPP;
2151                 goto out_err;
2152         }
2153
2154         while (1) {
2155                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2156                                              mac_addr, &sinfo);
2157                 if (err == -ENOENT)
2158                         break;
2159                 if (err)
2160                         goto out_err;
2161
2162                 if (nl80211_send_station(skb,
2163                                 NETLINK_CB(cb->skb).pid,
2164                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2165                                 netdev, mac_addr,
2166                                 &sinfo) < 0)
2167                         goto out;
2168
2169                 sta_idx++;
2170         }
2171
2172
2173  out:
2174         cb->args[1] = sta_idx;
2175         err = skb->len;
2176  out_err:
2177         nl80211_finish_netdev_dump(dev);
2178
2179         return err;
2180 }
2181
2182 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2183 {
2184         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2185         struct net_device *dev = info->user_ptr[1];
2186         struct station_info sinfo;
2187         struct sk_buff *msg;
2188         u8 *mac_addr = NULL;
2189         int err;
2190
2191         memset(&sinfo, 0, sizeof(sinfo));
2192
2193         if (!info->attrs[NL80211_ATTR_MAC])
2194                 return -EINVAL;
2195
2196         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2197
2198         if (!rdev->ops->get_station)
2199                 return -EOPNOTSUPP;
2200
2201         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2202         if (err)
2203                 return err;
2204
2205         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2206         if (!msg)
2207                 return -ENOMEM;
2208
2209         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2210                                  dev, mac_addr, &sinfo) < 0) {
2211                 nlmsg_free(msg);
2212                 return -ENOBUFS;
2213         }
2214
2215         return genlmsg_reply(msg, info);
2216 }
2217
2218 /*
2219  * Get vlan interface making sure it is running and on the right wiphy.
2220  */
2221 static int get_vlan(struct genl_info *info,
2222                     struct cfg80211_registered_device *rdev,
2223                     struct net_device **vlan)
2224 {
2225         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2226         *vlan = NULL;
2227
2228         if (vlanattr) {
2229                 *vlan = dev_get_by_index(genl_info_net(info),
2230                                          nla_get_u32(vlanattr));
2231                 if (!*vlan)
2232                         return -ENODEV;
2233                 if (!(*vlan)->ieee80211_ptr)
2234                         return -EINVAL;
2235                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2236                         return -EINVAL;
2237                 if (!netif_running(*vlan))
2238                         return -ENETDOWN;
2239         }
2240         return 0;
2241 }
2242
2243 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2244 {
2245         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2246         int err;
2247         struct net_device *dev = info->user_ptr[1];
2248         struct station_parameters params;
2249         u8 *mac_addr = NULL;
2250
2251         memset(&params, 0, sizeof(params));
2252
2253         params.listen_interval = -1;
2254         params.plink_state = PLINK_INVALID;
2255
2256         if (info->attrs[NL80211_ATTR_STA_AID])
2257                 return -EINVAL;
2258
2259         if (!info->attrs[NL80211_ATTR_MAC])
2260                 return -EINVAL;
2261
2262         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2263
2264         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2265                 params.supported_rates =
2266                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2267                 params.supported_rates_len =
2268                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2269         }
2270
2271         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2272                 params.listen_interval =
2273                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2274
2275         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2276                 params.ht_capa =
2277                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2278
2279         if (parse_station_flags(info, &params))
2280                 return -EINVAL;
2281
2282         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2283                 params.plink_action =
2284                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2285
2286         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2287                 params.plink_state =
2288                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2289
2290         err = get_vlan(info, rdev, &params.vlan);
2291         if (err)
2292                 goto out;
2293
2294         /* validate settings */
2295         err = 0;
2296
2297         switch (dev->ieee80211_ptr->iftype) {
2298         case NL80211_IFTYPE_AP:
2299         case NL80211_IFTYPE_AP_VLAN:
2300         case NL80211_IFTYPE_P2P_GO:
2301                 /* disallow mesh-specific things */
2302                 if (params.plink_action)
2303                         err = -EINVAL;
2304                 break;
2305         case NL80211_IFTYPE_P2P_CLIENT:
2306         case NL80211_IFTYPE_STATION:
2307                 /* disallow everything but AUTHORIZED flag */
2308                 if (params.plink_action)
2309                         err = -EINVAL;
2310                 if (params.vlan)
2311                         err = -EINVAL;
2312                 if (params.supported_rates)
2313                         err = -EINVAL;
2314                 if (params.ht_capa)
2315                         err = -EINVAL;
2316                 if (params.listen_interval >= 0)
2317                         err = -EINVAL;
2318                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2319                         err = -EINVAL;
2320                 break;
2321         case NL80211_IFTYPE_MESH_POINT:
2322                 /* disallow things mesh doesn't support */
2323                 if (params.vlan)
2324                         err = -EINVAL;
2325                 if (params.ht_capa)
2326                         err = -EINVAL;
2327                 if (params.listen_interval >= 0)
2328                         err = -EINVAL;
2329                 if (params.sta_flags_mask &
2330                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2331                                   BIT(NL80211_STA_FLAG_MFP) |
2332                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2333                         err = -EINVAL;
2334                 break;
2335         default:
2336                 err = -EINVAL;
2337         }
2338
2339         if (err)
2340                 goto out;
2341
2342         if (!rdev->ops->change_station) {
2343                 err = -EOPNOTSUPP;
2344                 goto out;
2345         }
2346
2347         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2348
2349  out:
2350         if (params.vlan)
2351                 dev_put(params.vlan);
2352
2353         return err;
2354 }
2355
2356 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2357 {
2358         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2359         int err;
2360         struct net_device *dev = info->user_ptr[1];
2361         struct station_parameters params;
2362         u8 *mac_addr = NULL;
2363
2364         memset(&params, 0, sizeof(params));
2365
2366         if (!info->attrs[NL80211_ATTR_MAC])
2367                 return -EINVAL;
2368
2369         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2370                 return -EINVAL;
2371
2372         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2373                 return -EINVAL;
2374
2375         if (!info->attrs[NL80211_ATTR_STA_AID])
2376                 return -EINVAL;
2377
2378         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2379         params.supported_rates =
2380                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2381         params.supported_rates_len =
2382                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2383         params.listen_interval =
2384                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2385
2386         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2387         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2388                 return -EINVAL;
2389
2390         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2391                 params.ht_capa =
2392                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2393
2394         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2395                 params.plink_action =
2396                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2397
2398         if (parse_station_flags(info, &params))
2399                 return -EINVAL;
2400
2401         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2402             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2403             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2404             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2405                 return -EINVAL;
2406
2407         err = get_vlan(info, rdev, &params.vlan);
2408         if (err)
2409                 goto out;
2410
2411         /* validate settings */
2412         err = 0;
2413
2414         if (!rdev->ops->add_station) {
2415                 err = -EOPNOTSUPP;
2416                 goto out;
2417         }
2418
2419         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2420
2421  out:
2422         if (params.vlan)
2423                 dev_put(params.vlan);
2424         return err;
2425 }
2426
2427 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2428 {
2429         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2430         struct net_device *dev = info->user_ptr[1];
2431         u8 *mac_addr = NULL;
2432
2433         if (info->attrs[NL80211_ATTR_MAC])
2434                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2435
2436         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2437             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2438             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2439             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2440                 return -EINVAL;
2441
2442         if (!rdev->ops->del_station)
2443                 return -EOPNOTSUPP;
2444
2445         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2446 }
2447
2448 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2449                                 int flags, struct net_device *dev,
2450                                 u8 *dst, u8 *next_hop,
2451                                 struct mpath_info *pinfo)
2452 {
2453         void *hdr;
2454         struct nlattr *pinfoattr;
2455
2456         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2457         if (!hdr)
2458                 return -1;
2459
2460         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2461         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2462         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2463
2464         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2465
2466         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2467         if (!pinfoattr)
2468                 goto nla_put_failure;
2469         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2470                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2471                             pinfo->frame_qlen);
2472         if (pinfo->filled & MPATH_INFO_SN)
2473                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2474                             pinfo->sn);
2475         if (pinfo->filled & MPATH_INFO_METRIC)
2476                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2477                             pinfo->metric);
2478         if (pinfo->filled & MPATH_INFO_EXPTIME)
2479                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2480                             pinfo->exptime);
2481         if (pinfo->filled & MPATH_INFO_FLAGS)
2482                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2483                             pinfo->flags);
2484         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2485                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2486                             pinfo->discovery_timeout);
2487         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2488                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2489                             pinfo->discovery_retries);
2490
2491         nla_nest_end(msg, pinfoattr);
2492
2493         return genlmsg_end(msg, hdr);
2494
2495  nla_put_failure:
2496         genlmsg_cancel(msg, hdr);
2497         return -EMSGSIZE;
2498 }
2499
2500 static int nl80211_dump_mpath(struct sk_buff *skb,
2501                               struct netlink_callback *cb)
2502 {
2503         struct mpath_info pinfo;
2504         struct cfg80211_registered_device *dev;
2505         struct net_device *netdev;
2506         u8 dst[ETH_ALEN];
2507         u8 next_hop[ETH_ALEN];
2508         int path_idx = cb->args[1];
2509         int err;
2510
2511         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2512         if (err)
2513                 return err;
2514
2515         if (!dev->ops->dump_mpath) {
2516                 err = -EOPNOTSUPP;
2517                 goto out_err;
2518         }
2519
2520         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2521                 err = -EOPNOTSUPP;
2522                 goto out_err;
2523         }
2524
2525         while (1) {
2526                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2527                                            dst, next_hop, &pinfo);
2528                 if (err == -ENOENT)
2529                         break;
2530                 if (err)
2531                         goto out_err;
2532
2533                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2534                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2535                                        netdev, dst, next_hop,
2536                                        &pinfo) < 0)
2537                         goto out;
2538
2539                 path_idx++;
2540         }
2541
2542
2543  out:
2544         cb->args[1] = path_idx;
2545         err = skb->len;
2546  out_err:
2547         nl80211_finish_netdev_dump(dev);
2548         return err;
2549 }
2550
2551 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2552 {
2553         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2554         int err;
2555         struct net_device *dev = info->user_ptr[1];
2556         struct mpath_info pinfo;
2557         struct sk_buff *msg;
2558         u8 *dst = NULL;
2559         u8 next_hop[ETH_ALEN];
2560
2561         memset(&pinfo, 0, sizeof(pinfo));
2562
2563         if (!info->attrs[NL80211_ATTR_MAC])
2564                 return -EINVAL;
2565
2566         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2567
2568         if (!rdev->ops->get_mpath)
2569                 return -EOPNOTSUPP;
2570
2571         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2572                 return -EOPNOTSUPP;
2573
2574         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2575         if (err)
2576                 return err;
2577
2578         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2579         if (!msg)
2580                 return -ENOMEM;
2581
2582         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2583                                  dev, dst, next_hop, &pinfo) < 0) {
2584                 nlmsg_free(msg);
2585                 return -ENOBUFS;
2586         }
2587
2588         return genlmsg_reply(msg, info);
2589 }
2590
2591 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2592 {
2593         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2594         struct net_device *dev = info->user_ptr[1];
2595         u8 *dst = NULL;
2596         u8 *next_hop = NULL;
2597
2598         if (!info->attrs[NL80211_ATTR_MAC])
2599                 return -EINVAL;
2600
2601         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2602                 return -EINVAL;
2603
2604         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2605         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2606
2607         if (!rdev->ops->change_mpath)
2608                 return -EOPNOTSUPP;
2609
2610         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2611                 return -EOPNOTSUPP;
2612
2613         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2614 }
2615
2616 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2617 {
2618         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2619         struct net_device *dev = info->user_ptr[1];
2620         u8 *dst = NULL;
2621         u8 *next_hop = NULL;
2622
2623         if (!info->attrs[NL80211_ATTR_MAC])
2624                 return -EINVAL;
2625
2626         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2627                 return -EINVAL;
2628
2629         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2630         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2631
2632         if (!rdev->ops->add_mpath)
2633                 return -EOPNOTSUPP;
2634
2635         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2636                 return -EOPNOTSUPP;
2637
2638         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2639 }
2640
2641 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2642 {
2643         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2644         struct net_device *dev = info->user_ptr[1];
2645         u8 *dst = NULL;
2646
2647         if (info->attrs[NL80211_ATTR_MAC])
2648                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2649
2650         if (!rdev->ops->del_mpath)
2651                 return -EOPNOTSUPP;
2652
2653         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2654 }
2655
2656 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2657 {
2658         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2659         struct net_device *dev = info->user_ptr[1];
2660         struct bss_parameters params;
2661
2662         memset(&params, 0, sizeof(params));
2663         /* default to not changing parameters */
2664         params.use_cts_prot = -1;
2665         params.use_short_preamble = -1;
2666         params.use_short_slot_time = -1;
2667         params.ap_isolate = -1;
2668         params.ht_opmode = -1;
2669
2670         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2671                 params.use_cts_prot =
2672                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2673         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2674                 params.use_short_preamble =
2675                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2676         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2677                 params.use_short_slot_time =
2678                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2679         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2680                 params.basic_rates =
2681                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2682                 params.basic_rates_len =
2683                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2684         }
2685         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2686                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2687         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2688                 params.ht_opmode =
2689                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2690
2691         if (!rdev->ops->change_bss)
2692                 return -EOPNOTSUPP;
2693
2694         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2695             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2696                 return -EOPNOTSUPP;
2697
2698         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2699 }
2700
2701 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2702         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2703         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2704         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2705         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2706         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2707         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2708 };
2709
2710 static int parse_reg_rule(struct nlattr *tb[],
2711         struct ieee80211_reg_rule *reg_rule)
2712 {
2713         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2714         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2715
2716         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2717                 return -EINVAL;
2718         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2719                 return -EINVAL;
2720         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2721                 return -EINVAL;
2722         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2723                 return -EINVAL;
2724         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2725                 return -EINVAL;
2726
2727         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2728
2729         freq_range->start_freq_khz =
2730                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2731         freq_range->end_freq_khz =
2732                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2733         freq_range->max_bandwidth_khz =
2734                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2735
2736         power_rule->max_eirp =
2737                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2738
2739         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2740                 power_rule->max_antenna_gain =
2741                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2742
2743         return 0;
2744 }
2745
2746 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2747 {
2748         int r;
2749         char *data = NULL;
2750
2751         /*
2752          * You should only get this when cfg80211 hasn't yet initialized
2753          * completely when built-in to the kernel right between the time
2754          * window between nl80211_init() and regulatory_init(), if that is
2755          * even possible.
2756          */
2757         mutex_lock(&cfg80211_mutex);
2758         if (unlikely(!cfg80211_regdomain)) {
2759                 mutex_unlock(&cfg80211_mutex);
2760                 return -EINPROGRESS;
2761         }
2762         mutex_unlock(&cfg80211_mutex);
2763
2764         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2765                 return -EINVAL;
2766
2767         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2768
2769         r = regulatory_hint_user(data);
2770
2771         return r;
2772 }
2773
2774 static int nl80211_get_mesh_config(struct sk_buff *skb,
2775                                    struct genl_info *info)
2776 {
2777         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2778         struct net_device *dev = info->user_ptr[1];
2779         struct wireless_dev *wdev = dev->ieee80211_ptr;
2780         struct mesh_config cur_params;
2781         int err = 0;
2782         void *hdr;
2783         struct nlattr *pinfoattr;
2784         struct sk_buff *msg;
2785
2786         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2787                 return -EOPNOTSUPP;
2788
2789         if (!rdev->ops->get_mesh_config)
2790                 return -EOPNOTSUPP;
2791
2792         wdev_lock(wdev);
2793         /* If not connected, get default parameters */
2794         if (!wdev->mesh_id_len)
2795                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2796         else
2797                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
2798                                                  &cur_params);
2799         wdev_unlock(wdev);
2800
2801         if (err)
2802                 return err;
2803
2804         /* Draw up a netlink message to send back */
2805         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2806         if (!msg)
2807                 return -ENOMEM;
2808         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2809                              NL80211_CMD_GET_MESH_CONFIG);
2810         if (!hdr)
2811                 goto out;
2812         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
2813         if (!pinfoattr)
2814                 goto nla_put_failure;
2815         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2816         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2817                         cur_params.dot11MeshRetryTimeout);
2818         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2819                         cur_params.dot11MeshConfirmTimeout);
2820         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2821                         cur_params.dot11MeshHoldingTimeout);
2822         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2823                         cur_params.dot11MeshMaxPeerLinks);
2824         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2825                         cur_params.dot11MeshMaxRetries);
2826         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2827                         cur_params.dot11MeshTTL);
2828         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2829                         cur_params.element_ttl);
2830         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2831                         cur_params.auto_open_plinks);
2832         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2833                         cur_params.dot11MeshHWMPmaxPREQretries);
2834         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2835                         cur_params.path_refresh_time);
2836         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2837                         cur_params.min_discovery_timeout);
2838         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2839                         cur_params.dot11MeshHWMPactivePathTimeout);
2840         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2841                         cur_params.dot11MeshHWMPpreqMinInterval);
2842         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2843                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2844         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2845                         cur_params.dot11MeshHWMPRootMode);
2846         nla_nest_end(msg, pinfoattr);
2847         genlmsg_end(msg, hdr);
2848         return genlmsg_reply(msg, info);
2849
2850  nla_put_failure:
2851         genlmsg_cancel(msg, hdr);
2852  out:
2853         nlmsg_free(msg);
2854         return -ENOBUFS;
2855 }
2856
2857 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2858         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2859         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2860         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2861         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2862         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2863         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2864         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2865         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2866
2867         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2868         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2869         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2870         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2871         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2872         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2873 };
2874
2875 static const struct nla_policy
2876         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
2877         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
2878         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
2879         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
2880         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
2881                 .len = IEEE80211_MAX_DATA_LEN },
2882         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
2883 };
2884
2885 static int nl80211_parse_mesh_config(struct genl_info *info,
2886                                      struct mesh_config *cfg,
2887                                      u32 *mask_out)
2888 {
2889         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2890         u32 mask = 0;
2891
2892 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2893 do {\
2894         if (table[attr_num]) {\
2895                 cfg->param = nla_fn(table[attr_num]); \
2896                 mask |= (1 << (attr_num - 1)); \
2897         } \
2898 } while (0);\
2899
2900
2901         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
2902                 return -EINVAL;
2903         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2904                              info->attrs[NL80211_ATTR_MESH_CONFIG],
2905                              nl80211_meshconf_params_policy))
2906                 return -EINVAL;
2907
2908         /* This makes sure that there aren't more than 32 mesh config
2909          * parameters (otherwise our bitfield scheme would not work.) */
2910         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2911
2912         /* Fill in the params struct */
2913         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2914                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2915         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2916                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2917         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2918                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2919         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2920                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2921         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2922                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2923         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2924                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2925         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
2926                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
2927         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2928                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2929         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2930                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2931                         nla_get_u8);
2932         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2933                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2934         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2935                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2936                         nla_get_u16);
2937         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2938                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2939                         nla_get_u32);
2940         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2941                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2942                         nla_get_u16);
2943         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2944                         dot11MeshHWMPnetDiameterTraversalTime,
2945                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2946                         nla_get_u16);
2947         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2948                         dot11MeshHWMPRootMode, mask,
2949                         NL80211_MESHCONF_HWMP_ROOTMODE,
2950                         nla_get_u8);
2951         if (mask_out)
2952                 *mask_out = mask;
2953
2954         return 0;
2955
2956 #undef FILL_IN_MESH_PARAM_IF_SET
2957 }
2958
2959 static int nl80211_parse_mesh_setup(struct genl_info *info,
2960                                      struct mesh_setup *setup)
2961 {
2962         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
2963
2964         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
2965                 return -EINVAL;
2966         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
2967                              info->attrs[NL80211_ATTR_MESH_SETUP],
2968                              nl80211_mesh_setup_params_policy))
2969                 return -EINVAL;
2970
2971         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
2972                 setup->path_sel_proto =
2973                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
2974                  IEEE80211_PATH_PROTOCOL_VENDOR :
2975                  IEEE80211_PATH_PROTOCOL_HWMP;
2976
2977         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
2978                 setup->path_metric =
2979                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
2980                  IEEE80211_PATH_METRIC_VENDOR :
2981                  IEEE80211_PATH_METRIC_AIRTIME;
2982
2983
2984         if (tb[NL80211_MESH_SETUP_IE]) {
2985                 struct nlattr *ieattr =
2986                         tb[NL80211_MESH_SETUP_IE];
2987                 if (!is_valid_ie_attr(ieattr))
2988                         return -EINVAL;
2989                 setup->ie = nla_data(ieattr);
2990                 setup->ie_len = nla_len(ieattr);
2991         }
2992         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
2993         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
2994
2995         return 0;
2996 }
2997
2998 static int nl80211_update_mesh_config(struct sk_buff *skb,
2999                                       struct genl_info *info)
3000 {
3001         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3002         struct net_device *dev = info->user_ptr[1];
3003         struct wireless_dev *wdev = dev->ieee80211_ptr;
3004         struct mesh_config cfg;
3005         u32 mask;
3006         int err;
3007
3008         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3009                 return -EOPNOTSUPP;
3010
3011         if (!rdev->ops->update_mesh_config)
3012                 return -EOPNOTSUPP;
3013
3014         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3015         if (err)
3016                 return err;
3017
3018         wdev_lock(wdev);
3019         if (!wdev->mesh_id_len)
3020                 err = -ENOLINK;
3021
3022         if (!err)
3023                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3024                                                     mask, &cfg);
3025
3026         wdev_unlock(wdev);
3027
3028         return err;
3029 }
3030
3031 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3032 {
3033         struct sk_buff *msg;
3034         void *hdr = NULL;
3035         struct nlattr *nl_reg_rules;
3036         unsigned int i;
3037         int err = -EINVAL;
3038
3039         mutex_lock(&cfg80211_mutex);
3040
3041         if (!cfg80211_regdomain)
3042                 goto out;
3043
3044         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3045         if (!msg) {
3046                 err = -ENOBUFS;
3047                 goto out;
3048         }
3049
3050         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3051                              NL80211_CMD_GET_REG);
3052         if (!hdr)
3053                 goto put_failure;
3054
3055         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3056                 cfg80211_regdomain->alpha2);
3057
3058         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3059         if (!nl_reg_rules)
3060                 goto nla_put_failure;
3061
3062         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3063                 struct nlattr *nl_reg_rule;
3064                 const struct ieee80211_reg_rule *reg_rule;
3065                 const struct ieee80211_freq_range *freq_range;
3066                 const struct ieee80211_power_rule *power_rule;
3067
3068                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3069                 freq_range = &reg_rule->freq_range;
3070                 power_rule = &reg_rule->power_rule;
3071
3072                 nl_reg_rule = nla_nest_start(msg, i);
3073                 if (!nl_reg_rule)
3074                         goto nla_put_failure;
3075
3076                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3077                         reg_rule->flags);
3078                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3079                         freq_range->start_freq_khz);
3080                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3081                         freq_range->end_freq_khz);
3082                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3083                         freq_range->max_bandwidth_khz);
3084                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3085                         power_rule->max_antenna_gain);
3086                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3087                         power_rule->max_eirp);
3088
3089                 nla_nest_end(msg, nl_reg_rule);
3090         }
3091
3092         nla_nest_end(msg, nl_reg_rules);
3093
3094         genlmsg_end(msg, hdr);
3095         err = genlmsg_reply(msg, info);
3096         goto out;
3097
3098 nla_put_failure:
3099         genlmsg_cancel(msg, hdr);
3100 put_failure:
3101         nlmsg_free(msg);
3102         err = -EMSGSIZE;
3103 out:
3104         mutex_unlock(&cfg80211_mutex);
3105         return err;
3106 }
3107
3108 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3109 {
3110         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3111         struct nlattr *nl_reg_rule;
3112         char *alpha2 = NULL;
3113         int rem_reg_rules = 0, r = 0;
3114         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3115         struct ieee80211_regdomain *rd = NULL;
3116
3117         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3118                 return -EINVAL;
3119
3120         if (!info->attrs[NL80211_ATTR_REG_RULES])
3121                 return -EINVAL;
3122
3123         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3124
3125         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3126                         rem_reg_rules) {
3127                 num_rules++;
3128                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3129                         return -EINVAL;
3130         }
3131
3132         mutex_lock(&cfg80211_mutex);
3133
3134         if (!reg_is_valid_request(alpha2)) {
3135                 r = -EINVAL;
3136                 goto bad_reg;
3137         }
3138
3139         size_of_regd = sizeof(struct ieee80211_regdomain) +
3140                 (num_rules * sizeof(struct ieee80211_reg_rule));
3141
3142         rd = kzalloc(size_of_regd, GFP_KERNEL);
3143         if (!rd) {
3144                 r = -ENOMEM;
3145                 goto bad_reg;
3146         }
3147
3148         rd->n_reg_rules = num_rules;
3149         rd->alpha2[0] = alpha2[0];
3150         rd->alpha2[1] = alpha2[1];
3151
3152         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3153                         rem_reg_rules) {
3154                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3155                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3156                         reg_rule_policy);
3157                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3158                 if (r)
3159                         goto bad_reg;
3160
3161                 rule_idx++;
3162
3163                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3164                         r = -EINVAL;
3165                         goto bad_reg;
3166                 }
3167         }
3168
3169         BUG_ON(rule_idx != num_rules);
3170
3171         r = set_regdom(rd);
3172
3173         mutex_unlock(&cfg80211_mutex);
3174
3175         return r;
3176
3177  bad_reg:
3178         mutex_unlock(&cfg80211_mutex);
3179         kfree(rd);
3180         return r;
3181 }
3182
3183 static int validate_scan_freqs(struct nlattr *freqs)
3184 {
3185         struct nlattr *attr1, *attr2;
3186         int n_channels = 0, tmp1, tmp2;
3187
3188         nla_for_each_nested(attr1, freqs, tmp1) {
3189                 n_channels++;
3190                 /*
3191                  * Some hardware has a limited channel list for
3192                  * scanning, and it is pretty much nonsensical
3193                  * to scan for a channel twice, so disallow that
3194                  * and don't require drivers to check that the
3195                  * channel list they get isn't longer than what
3196                  * they can scan, as long as they can scan all
3197                  * the channels they registered at once.
3198                  */
3199                 nla_for_each_nested(attr2, freqs, tmp2)
3200                         if (attr1 != attr2 &&
3201                             nla_get_u32(attr1) == nla_get_u32(attr2))
3202                                 return 0;
3203         }
3204
3205         return n_channels;
3206 }
3207
3208 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3209 {
3210         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3211         struct net_device *dev = info->user_ptr[1];
3212         struct cfg80211_scan_request *request;
3213         struct cfg80211_ssid *ssid;
3214         struct ieee80211_channel *channel;
3215         struct nlattr *attr;
3216         struct wiphy *wiphy;
3217         int err, tmp, n_ssids = 0, n_channels, i;
3218         enum ieee80211_band band;
3219         size_t ie_len;
3220
3221         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3222                 return -EINVAL;
3223
3224         wiphy = &rdev->wiphy;
3225
3226         if (!rdev->ops->scan)
3227                 return -EOPNOTSUPP;
3228
3229         if (rdev->scan_req)
3230                 return -EBUSY;
3231
3232         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3233                 n_channels = validate_scan_freqs(
3234                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3235                 if (!n_channels)
3236                         return -EINVAL;
3237         } else {
3238                 n_channels = 0;
3239
3240                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3241                         if (wiphy->bands[band])
3242                                 n_channels += wiphy->bands[band]->n_channels;
3243         }
3244
3245         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3246                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3247                         n_ssids++;
3248
3249         if (n_ssids > wiphy->max_scan_ssids)
3250                 return -EINVAL;
3251
3252         if (info->attrs[NL80211_ATTR_IE])
3253                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3254         else
3255                 ie_len = 0;
3256
3257         if (ie_len > wiphy->max_scan_ie_len)
3258                 return -EINVAL;
3259
3260         request = kzalloc(sizeof(*request)
3261                         + sizeof(*ssid) * n_ssids
3262                         + sizeof(channel) * n_channels
3263                         + ie_len, GFP_KERNEL);
3264         if (!request)
3265                 return -ENOMEM;
3266
3267         if (n_ssids)
3268                 request->ssids = (void *)&request->channels[n_channels];
3269         request->n_ssids = n_ssids;
3270         if (ie_len) {
3271                 if (request->ssids)
3272                         request->ie = (void *)(request->ssids + n_ssids);
3273                 else
3274                         request->ie = (void *)(request->channels + n_channels);
3275         }
3276
3277         i = 0;
3278         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3279                 /* user specified, bail out if channel not found */
3280                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3281                         struct ieee80211_channel *chan;
3282
3283                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3284
3285                         if (!chan) {
3286                                 err = -EINVAL;
3287                                 goto out_free;
3288                         }
3289
3290                         /* ignore disabled channels */
3291                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3292                                 continue;
3293
3294                         request->channels[i] = chan;
3295                         i++;
3296                 }
3297         } else {
3298                 /* all channels */
3299                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3300                         int j;
3301                         if (!wiphy->bands[band])
3302                                 continue;
3303                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3304                                 struct ieee80211_channel *chan;
3305
3306                                 chan = &wiphy->bands[band]->channels[j];
3307
3308                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3309                                         continue;
3310
3311                                 request->channels[i] = chan;
3312                                 i++;
3313                         }
3314                 }
3315         }
3316
3317         if (!i) {
3318                 err = -EINVAL;
3319                 goto out_free;
3320         }
3321
3322         request->n_channels = i;
3323
3324         i = 0;
3325         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3326                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3327                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3328                                 err = -EINVAL;
3329                                 goto out_free;
3330                         }
3331                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3332                         request->ssids[i].ssid_len = nla_len(attr);
3333                         i++;
3334                 }
3335         }
3336
3337         if (info->attrs[NL80211_ATTR_IE]) {
3338                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3339                 memcpy((void *)request->ie,
3340                        nla_data(info->attrs[NL80211_ATTR_IE]),
3341                        request->ie_len);
3342         }
3343
3344         request->dev = dev;
3345         request->wiphy = &rdev->wiphy;
3346
3347         rdev->scan_req = request;
3348         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3349
3350         if (!err) {
3351                 nl80211_send_scan_start(rdev, dev);
3352                 dev_hold(dev);
3353         } else {
3354  out_free:
3355                 rdev->scan_req = NULL;
3356                 kfree(request);
3357         }
3358
3359         return err;
3360 }
3361
3362 static int nl80211_start_sched_scan(struct sk_buff *skb,
3363                                     struct genl_info *info)
3364 {
3365         struct cfg80211_sched_scan_request *request;
3366         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3367         struct net_device *dev = info->user_ptr[1];
3368         struct cfg80211_ssid *ssid;
3369         struct ieee80211_channel *channel;
3370         struct nlattr *attr;
3371         struct wiphy *wiphy;
3372         int err, tmp, n_ssids = 0, n_channels, i;
3373         enum ieee80211_band band;
3374         size_t ie_len;
3375
3376         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3377             !rdev->ops->sched_scan_start)
3378                 return -EOPNOTSUPP;
3379
3380         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3381                 return -EINVAL;
3382
3383         if (rdev->sched_scan_req)
3384                 return -EINPROGRESS;
3385
3386         wiphy = &rdev->wiphy;
3387
3388         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3389                 n_channels = validate_scan_freqs(
3390                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3391                 if (!n_channels)
3392                         return -EINVAL;
3393         } else {
3394                 n_channels = 0;
3395
3396                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3397                         if (wiphy->bands[band])
3398                                 n_channels += wiphy->bands[band]->n_channels;
3399         }
3400
3401         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3402                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3403                                     tmp)
3404                         n_ssids++;
3405
3406         if (n_ssids > wiphy->max_scan_ssids)
3407                 return -EINVAL;
3408
3409         if (info->attrs[NL80211_ATTR_IE])
3410                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3411         else
3412                 ie_len = 0;
3413
3414         if (ie_len > wiphy->max_scan_ie_len)
3415                 return -EINVAL;
3416
3417         request = kzalloc(sizeof(*request)
3418                         + sizeof(*ssid) * n_ssids
3419                         + sizeof(channel) * n_channels
3420                         + ie_len, GFP_KERNEL);
3421         if (!request)
3422                 return -ENOMEM;
3423
3424         if (n_ssids)
3425                 request->ssids = (void *)&request->channels[n_channels];
3426         request->n_ssids = n_ssids;
3427         if (ie_len) {
3428                 if (request->ssids)
3429                         request->ie = (void *)(request->ssids + n_ssids);
3430                 else
3431                         request->ie = (void *)(request->channels + n_channels);
3432         }
3433
3434         i = 0;
3435         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3436                 /* user specified, bail out if channel not found */
3437                 nla_for_each_nested(attr,
3438                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3439                                     tmp) {
3440                         struct ieee80211_channel *chan;
3441
3442                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3443
3444                         if (!chan) {
3445                                 err = -EINVAL;
3446                                 goto out_free;
3447                         }
3448
3449                         /* ignore disabled channels */
3450                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3451                                 continue;
3452
3453                         request->channels[i] = chan;
3454                         i++;
3455                 }
3456         } else {
3457                 /* all channels */
3458                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3459                         int j;
3460                         if (!wiphy->bands[band])
3461                                 continue;
3462                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3463                                 struct ieee80211_channel *chan;
3464
3465                                 chan = &wiphy->bands[band]->channels[j];
3466
3467                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3468                                         continue;
3469
3470                                 request->channels[i] = chan;
3471                                 i++;
3472                         }
3473                 }
3474         }
3475
3476         if (!i) {
3477                 err = -EINVAL;
3478                 goto out_free;
3479         }
3480
3481         request->n_channels = i;
3482
3483         i = 0;
3484         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3485                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3486                                     tmp) {
3487                         if (request->ssids[i].ssid_len >
3488                             IEEE80211_MAX_SSID_LEN) {
3489                                 err = -EINVAL;
3490                                 goto out_free;
3491                         }
3492                         memcpy(request->ssids[i].ssid, nla_data(attr),
3493                                nla_len(attr));
3494                         request->ssids[i].ssid_len = nla_len(attr);
3495                         i++;
3496                 }
3497         }
3498
3499         if (info->attrs[NL80211_ATTR_IE]) {
3500                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3501                 memcpy((void *)request->ie,
3502                        nla_data(info->attrs[NL80211_ATTR_IE]),
3503                        request->ie_len);
3504         }
3505
3506         request->dev = dev;
3507         request->wiphy = &rdev->wiphy;
3508
3509         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
3510         if (!err) {
3511                 rdev->sched_scan_req = request;
3512                 nl80211_send_sched_scan(rdev, dev,
3513                                         NL80211_CMD_START_SCHED_SCAN);
3514                 goto out;
3515         }
3516
3517 out_free:
3518         kfree(request);
3519 out:
3520         return err;
3521 }
3522
3523 static int nl80211_stop_sched_scan(struct sk_buff *skb,
3524                                    struct genl_info *info)
3525 {
3526         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3527
3528         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3529             !rdev->ops->sched_scan_stop)
3530                 return -EOPNOTSUPP;
3531
3532         return __cfg80211_stop_sched_scan(rdev, false);
3533 }
3534
3535 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3536                             struct cfg80211_registered_device *rdev,
3537                             struct wireless_dev *wdev,
3538                             struct cfg80211_internal_bss *intbss)
3539 {
3540         struct cfg80211_bss *res = &intbss->pub;
3541         void *hdr;
3542         struct nlattr *bss;
3543         int i;
3544
3545         ASSERT_WDEV_LOCK(wdev);
3546
3547         hdr = nl80211hdr_put(msg, pid, seq, flags,
3548                              NL80211_CMD_NEW_SCAN_RESULTS);
3549         if (!hdr)
3550                 return -1;
3551
3552         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3553         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3554
3555         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3556         if (!bss)
3557                 goto nla_put_failure;
3558         if (!is_zero_ether_addr(res->bssid))
3559                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3560         if (res->information_elements && res->len_information_elements)
3561                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3562                         res->len_information_elements,
3563                         res->information_elements);
3564         if (res->beacon_ies && res->len_beacon_ies &&
3565             res->beacon_ies != res->information_elements)
3566                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3567                         res->len_beacon_ies, res->beacon_ies);
3568         if (res->tsf)
3569                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3570         if (res->beacon_interval)
3571                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3572         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3573         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3574         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3575                 jiffies_to_msecs(jiffies - intbss->ts));
3576
3577         switch (rdev->wiphy.signal_type) {
3578         case CFG80211_SIGNAL_TYPE_MBM:
3579                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3580                 break;
3581         case CFG80211_SIGNAL_TYPE_UNSPEC:
3582                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3583                 break;
3584         default:
3585                 break;
3586         }
3587
3588         switch (wdev->iftype) {
3589         case NL80211_IFTYPE_P2P_CLIENT:
3590         case NL80211_IFTYPE_STATION:
3591                 if (intbss == wdev->current_bss)
3592                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3593                                     NL80211_BSS_STATUS_ASSOCIATED);
3594                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3595                         if (intbss != wdev->auth_bsses[i])
3596                                 continue;
3597                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3598                                     NL80211_BSS_STATUS_AUTHENTICATED);
3599                         break;
3600                 }
3601                 break;
3602         case NL80211_IFTYPE_ADHOC:
3603                 if (intbss == wdev->current_bss)
3604                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3605                                     NL80211_BSS_STATUS_IBSS_JOINED);
3606                 break;
3607         default:
3608                 break;
3609         }
3610
3611         nla_nest_end(msg, bss);
3612
3613         return genlmsg_end(msg, hdr);
3614
3615  nla_put_failure:
3616         genlmsg_cancel(msg, hdr);
3617         return -EMSGSIZE;
3618 }
3619
3620 static int nl80211_dump_scan(struct sk_buff *skb,
3621                              struct netlink_callback *cb)
3622 {
3623         struct cfg80211_registered_device *rdev;
3624         struct net_device *dev;
3625         struct cfg80211_internal_bss *scan;
3626         struct wireless_dev *wdev;
3627         int start = cb->args[1], idx = 0;
3628         int err;
3629
3630         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3631         if (err)
3632                 return err;
3633
3634         wdev = dev->ieee80211_ptr;
3635
3636         wdev_lock(wdev);
3637         spin_lock_bh(&rdev->bss_lock);
3638         cfg80211_bss_expire(rdev);
3639
3640         list_for_each_entry(scan, &rdev->bss_list, list) {
3641                 if (++idx <= start)
3642                         continue;
3643                 if (nl80211_send_bss(skb,
3644                                 NETLINK_CB(cb->skb).pid,
3645                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3646                                 rdev, wdev, scan) < 0) {
3647                         idx--;
3648                         break;
3649                 }
3650         }
3651
3652         spin_unlock_bh(&rdev->bss_lock);
3653         wdev_unlock(wdev);
3654
3655         cb->args[1] = idx;
3656         nl80211_finish_netdev_dump(rdev);
3657
3658         return skb->len;
3659 }
3660
3661 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3662                                 int flags, struct net_device *dev,
3663                                 struct survey_info *survey)
3664 {
3665         void *hdr;
3666         struct nlattr *infoattr;
3667
3668         /* Survey without a channel doesn't make sense */
3669         if (!survey->channel)
3670                 return -EINVAL;
3671
3672         hdr = nl80211hdr_put(msg, pid, seq, flags,
3673                              NL80211_CMD_NEW_SURVEY_RESULTS);
3674         if (!hdr)
3675                 return -ENOMEM;
3676
3677         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3678
3679         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3680         if (!infoattr)
3681                 goto nla_put_failure;
3682
3683         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3684                     survey->channel->center_freq);
3685         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3686                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3687                             survey->noise);
3688         if (survey->filled & SURVEY_INFO_IN_USE)
3689                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3690         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3691                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3692                             survey->channel_time);
3693         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3694                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3695                             survey->channel_time_busy);
3696         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3697                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3698                             survey->channel_time_ext_busy);
3699         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3700                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3701                             survey->channel_time_rx);
3702         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3703                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3704                             survey->channel_time_tx);
3705
3706         nla_nest_end(msg, infoattr);
3707
3708         return genlmsg_end(msg, hdr);
3709
3710  nla_put_failure:
3711         genlmsg_cancel(msg, hdr);
3712         return -EMSGSIZE;
3713 }
3714
3715 static int nl80211_dump_survey(struct sk_buff *skb,
3716                         struct netlink_callback *cb)
3717 {
3718         struct survey_info survey;
3719         struct cfg80211_registered_device *dev;
3720         struct net_device *netdev;
3721         int survey_idx = cb->args[1];
3722         int res;
3723
3724         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3725         if (res)
3726                 return res;
3727
3728         if (!dev->ops->dump_survey) {
3729                 res = -EOPNOTSUPP;
3730                 goto out_err;
3731         }
3732
3733         while (1) {
3734                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3735                                             &survey);
3736                 if (res == -ENOENT)
3737                         break;
3738                 if (res)
3739                         goto out_err;
3740
3741                 if (nl80211_send_survey(skb,
3742                                 NETLINK_CB(cb->skb).pid,
3743                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3744                                 netdev,
3745                                 &survey) < 0)
3746                         goto out;
3747                 survey_idx++;
3748         }
3749
3750  out:
3751         cb->args[1] = survey_idx;
3752         res = skb->len;
3753  out_err:
3754         nl80211_finish_netdev_dump(dev);
3755         return res;
3756 }
3757
3758 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3759 {
3760         return auth_type <= NL80211_AUTHTYPE_MAX;
3761 }
3762
3763 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3764 {
3765         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3766                                   NL80211_WPA_VERSION_2));
3767 }
3768
3769 static bool nl80211_valid_akm_suite(u32 akm)
3770 {
3771         return akm == WLAN_AKM_SUITE_8021X ||
3772                 akm == WLAN_AKM_SUITE_PSK;
3773 }
3774
3775 static bool nl80211_valid_cipher_suite(u32 cipher)
3776 {
3777         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3778                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3779                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3780                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3781                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3782 }
3783
3784
3785 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3786 {
3787         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3788         struct net_device *dev = info->user_ptr[1];
3789         struct ieee80211_channel *chan;
3790         const u8 *bssid, *ssid, *ie = NULL;
3791         int err, ssid_len, ie_len = 0;
3792         enum nl80211_auth_type auth_type;
3793         struct key_parse key;
3794         bool local_state_change;
3795
3796         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3797                 return -EINVAL;
3798
3799         if (!info->attrs[NL80211_ATTR_MAC])
3800                 return -EINVAL;
3801
3802         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3803                 return -EINVAL;
3804
3805         if (!info->attrs[NL80211_ATTR_SSID])
3806                 return -EINVAL;
3807
3808         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3809                 return -EINVAL;
3810
3811         err = nl80211_parse_key(info, &key);
3812         if (err)
3813                 return err;
3814
3815         if (key.idx >= 0) {
3816                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3817                         return -EINVAL;
3818                 if (!key.p.key || !key.p.key_len)
3819                         return -EINVAL;
3820                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3821                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3822                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3823                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3824                         return -EINVAL;
3825                 if (key.idx > 4)
3826                         return -EINVAL;
3827         } else {
3828                 key.p.key_len = 0;
3829                 key.p.key = NULL;
3830         }
3831
3832         if (key.idx >= 0) {
3833                 int i;
3834                 bool ok = false;
3835                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3836                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3837                                 ok = true;
3838                                 break;
3839                         }
3840                 }
3841                 if (!ok)
3842                         return -EINVAL;
3843         }
3844
3845         if (!rdev->ops->auth)
3846                 return -EOPNOTSUPP;
3847
3848         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3849             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3850                 return -EOPNOTSUPP;
3851
3852         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3853         chan = ieee80211_get_channel(&rdev->wiphy,
3854                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3855         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3856                 return -EINVAL;
3857
3858         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3859         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3860
3861         if (info->attrs[NL80211_ATTR_IE]) {
3862                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3863                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3864         }
3865
3866         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3867         if (!nl80211_valid_auth_type(auth_type))
3868                 return -EINVAL;
3869
3870         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3871
3872         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3873                                   ssid, ssid_len, ie, ie_len,
3874                                   key.p.key, key.p.key_len, key.idx,
3875                                   local_state_change);
3876 }
3877
3878 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3879                                    struct genl_info *info,
3880                                    struct cfg80211_crypto_settings *settings,
3881                                    int cipher_limit)
3882 {
3883         memset(settings, 0, sizeof(*settings));
3884
3885         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3886
3887         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3888                 u16 proto;
3889                 proto = nla_get_u16(
3890                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3891                 settings->control_port_ethertype = cpu_to_be16(proto);
3892                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3893                     proto != ETH_P_PAE)
3894                         return -EINVAL;
3895                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3896                         settings->control_port_no_encrypt = true;
3897         } else
3898                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3899
3900         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3901                 void *data;
3902                 int len, i;
3903
3904                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3905                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3906                 settings->n_ciphers_pairwise = len / sizeof(u32);
3907
3908                 if (len % sizeof(u32))
3909                         return -EINVAL;
3910
3911                 if (settings->n_ciphers_pairwise > cipher_limit)
3912                         return -EINVAL;
3913
3914                 memcpy(settings->ciphers_pairwise, data, len);
3915
3916                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3917                         if (!nl80211_valid_cipher_suite(
3918                                         settings->ciphers_pairwise[i]))
3919                                 return -EINVAL;
3920         }
3921
3922         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3923                 settings->cipher_group =
3924                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3925                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3926                         return -EINVAL;
3927         }
3928
3929         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3930                 settings->wpa_versions =
3931                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3932                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3933                         return -EINVAL;
3934         }
3935
3936         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3937                 void *data;
3938                 int len, i;
3939
3940                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3941                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3942                 settings->n_akm_suites = len / sizeof(u32);
3943
3944                 if (len % sizeof(u32))
3945                         return -EINVAL;
3946
3947                 memcpy(settings->akm_suites, data, len);
3948
3949                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3950                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3951                                 return -EINVAL;
3952         }
3953
3954         return 0;
3955 }
3956
3957 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3958 {
3959         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3960         struct net_device *dev = info->user_ptr[1];
3961         struct cfg80211_crypto_settings crypto;
3962         struct ieee80211_channel *chan;
3963         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3964         int err, ssid_len, ie_len = 0;
3965         bool use_mfp = false;
3966
3967         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3968                 return -EINVAL;
3969
3970         if (!info->attrs[NL80211_ATTR_MAC] ||
3971             !info->attrs[NL80211_ATTR_SSID] ||
3972             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3973                 return -EINVAL;
3974
3975         if (!rdev->ops->assoc)
3976                 return -EOPNOTSUPP;
3977
3978         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3979             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3980                 return -EOPNOTSUPP;
3981
3982         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3983
3984         chan = ieee80211_get_channel(&rdev->wiphy,
3985                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3986         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3987                 return -EINVAL;
3988
3989         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3990         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3991
3992         if (info->attrs[NL80211_ATTR_IE]) {
3993                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3994                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3995         }
3996
3997         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3998                 enum nl80211_mfp mfp =
3999                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4000                 if (mfp == NL80211_MFP_REQUIRED)
4001                         use_mfp = true;
4002                 else if (mfp != NL80211_MFP_NO)
4003                         return -EINVAL;
4004         }
4005
4006         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4007                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4008
4009         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4010         if (!err)
4011                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4012                                           ssid, ssid_len, ie, ie_len, use_mfp,
4013                                           &crypto);
4014
4015         return err;
4016 }
4017
4018 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4019 {
4020         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4021         struct net_device *dev = info->user_ptr[1];
4022         const u8 *ie = NULL, *bssid;
4023         int ie_len = 0;
4024         u16 reason_code;
4025         bool local_state_change;
4026
4027         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4028                 return -EINVAL;
4029
4030         if (!info->attrs[NL80211_ATTR_MAC])
4031                 return -EINVAL;
4032
4033         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4034                 return -EINVAL;
4035
4036         if (!rdev->ops->deauth)
4037                 return -EOPNOTSUPP;
4038
4039         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4040             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4041                 return -EOPNOTSUPP;
4042
4043         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4044
4045         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4046         if (reason_code == 0) {
4047                 /* Reason Code 0 is reserved */
4048                 return -EINVAL;
4049         }
4050
4051         if (info->attrs[NL80211_ATTR_IE]) {
4052                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4053                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4054         }
4055
4056         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4057
4058         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4059                                     local_state_change);
4060 }
4061
4062 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4063 {
4064         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4065         struct net_device *dev = info->user_ptr[1];
4066         const u8 *ie = NULL, *bssid;
4067         int ie_len = 0;
4068         u16 reason_code;
4069         bool local_state_change;
4070
4071         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4072                 return -EINVAL;
4073
4074         if (!info->attrs[NL80211_ATTR_MAC])
4075                 return -EINVAL;
4076
4077         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4078                 return -EINVAL;
4079
4080         if (!rdev->ops->disassoc)
4081                 return -EOPNOTSUPP;
4082
4083         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4084             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4085                 return -EOPNOTSUPP;
4086
4087         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4088
4089         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4090         if (reason_code == 0) {
4091                 /* Reason Code 0 is reserved */
4092                 return -EINVAL;
4093         }
4094
4095         if (info->attrs[NL80211_ATTR_IE]) {
4096                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4097                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4098         }
4099
4100         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4101
4102         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4103                                       local_state_change);
4104 }
4105
4106 static bool
4107 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4108                          int mcast_rate[IEEE80211_NUM_BANDS],
4109                          int rateval)
4110 {
4111         struct wiphy *wiphy = &rdev->wiphy;
4112         bool found = false;
4113         int band, i;
4114
4115         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4116                 struct ieee80211_supported_band *sband;
4117
4118                 sband = wiphy->bands[band];
4119                 if (!sband)
4120                         continue;
4121
4122                 for (i = 0; i < sband->n_bitrates; i++) {
4123                         if (sband->bitrates[i].bitrate == rateval) {
4124                                 mcast_rate[band] = i + 1;
4125                                 found = true;
4126                                 break;
4127                         }
4128                 }
4129         }
4130
4131         return found;
4132 }
4133
4134 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4135 {
4136         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4137         struct net_device *dev = info->user_ptr[1];
4138         struct cfg80211_ibss_params ibss;
4139         struct wiphy *wiphy;
4140         struct cfg80211_cached_keys *connkeys = NULL;
4141         int err;
4142
4143         memset(&ibss, 0, sizeof(ibss));
4144
4145         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4146                 return -EINVAL;
4147
4148         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4149             !info->attrs[NL80211_ATTR_SSID] ||
4150             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4151                 return -EINVAL;
4152
4153         ibss.beacon_interval = 100;
4154
4155         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4156                 ibss.beacon_interval =
4157                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4158                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4159                         return -EINVAL;
4160         }
4161
4162         if (!rdev->ops->join_ibss)
4163                 return -EOPNOTSUPP;
4164
4165         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4166                 return -EOPNOTSUPP;
4167
4168         wiphy = &rdev->wiphy;
4169
4170         if (info->attrs[NL80211_ATTR_MAC])
4171                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4172         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4173         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4174
4175         if (info->attrs[NL80211_ATTR_IE]) {
4176                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4177                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4178         }
4179
4180         ibss.channel = ieee80211_get_channel(wiphy,
4181                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4182         if (!ibss.channel ||
4183             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4184             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4185                 return -EINVAL;
4186
4187         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4188         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4189
4190         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4191                 u8 *rates =
4192                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4193                 int n_rates =
4194                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4195                 struct ieee80211_supported_band *sband =
4196                         wiphy->bands[ibss.channel->band];
4197                 int i, j;
4198
4199                 if (n_rates == 0)
4200                         return -EINVAL;
4201
4202                 for (i = 0; i < n_rates; i++) {
4203                         int rate = (rates[i] & 0x7f) * 5;
4204                         bool found = false;
4205
4206                         for (j = 0; j < sband->n_bitrates; j++) {
4207                                 if (sband->bitrates[j].bitrate == rate) {
4208                                         found = true;
4209                                         ibss.basic_rates |= BIT(j);
4210                                         break;
4211                                 }
4212                         }
4213                         if (!found)
4214                                 return -EINVAL;
4215                 }
4216         }
4217
4218         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4219             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4220                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4221                 return -EINVAL;
4222
4223         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4224                 connkeys = nl80211_parse_connkeys(rdev,
4225                                         info->attrs[NL80211_ATTR_KEYS]);
4226                 if (IS_ERR(connkeys))
4227                         return PTR_ERR(connkeys);
4228         }
4229
4230         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4231         if (err)
4232                 kfree(connkeys);
4233         return err;
4234 }
4235
4236 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4237 {
4238         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4239         struct net_device *dev = info->user_ptr[1];
4240
4241         if (!rdev->ops->leave_ibss)
4242                 return -EOPNOTSUPP;
4243
4244         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4245                 return -EOPNOTSUPP;
4246
4247         return cfg80211_leave_ibss(rdev, dev, false);
4248 }
4249
4250 #ifdef CONFIG_NL80211_TESTMODE
4251 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4252         .name = "testmode",
4253 };
4254
4255 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4256 {
4257         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4258         int err;
4259
4260         if (!info->attrs[NL80211_ATTR_TESTDATA])
4261                 return -EINVAL;
4262
4263         err = -EOPNOTSUPP;
4264         if (rdev->ops->testmode_cmd) {
4265                 rdev->testmode_info = info;
4266                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4267                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4268                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4269                 rdev->testmode_info = NULL;
4270         }
4271
4272         return err;
4273 }
4274
4275 static struct sk_buff *
4276 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4277                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4278 {
4279         struct sk_buff *skb;
4280         void *hdr;
4281         struct nlattr *data;
4282
4283         skb = nlmsg_new(approxlen + 100, gfp);
4284         if (!skb)
4285                 return NULL;
4286
4287         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4288         if (!hdr) {
4289                 kfree_skb(skb);
4290                 return NULL;
4291         }
4292
4293         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4294         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4295
4296         ((void **)skb->cb)[0] = rdev;
4297         ((void **)skb->cb)[1] = hdr;
4298         ((void **)skb->cb)[2] = data;
4299
4300         return skb;
4301
4302  nla_put_failure:
4303         kfree_skb(skb);
4304         return NULL;
4305 }
4306
4307 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4308                                                   int approxlen)
4309 {
4310         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4311
4312         if (WARN_ON(!rdev->testmode_info))
4313                 return NULL;
4314
4315         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4316                                 rdev->testmode_info->snd_pid,
4317                                 rdev->testmode_info->snd_seq,
4318                                 GFP_KERNEL);
4319 }
4320 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4321
4322 int cfg80211_testmode_reply(struct sk_buff *skb)
4323 {
4324         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4325         void *hdr = ((void **)skb->cb)[1];
4326         struct nlattr *data = ((void **)skb->cb)[2];
4327
4328         if (WARN_ON(!rdev->testmode_info)) {
4329                 kfree_skb(skb);
4330                 return -EINVAL;
4331         }
4332
4333         nla_nest_end(skb, data);
4334         genlmsg_end(skb, hdr);
4335         return genlmsg_reply(skb, rdev->testmode_info);
4336 }
4337 EXPORT_SYMBOL(cfg80211_testmode_reply);
4338
4339 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4340                                                   int approxlen, gfp_t gfp)
4341 {
4342         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4343
4344         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4345 }
4346 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4347
4348 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4349 {
4350         void *hdr = ((void **)skb->cb)[1];
4351         struct nlattr *data = ((void **)skb->cb)[2];
4352
4353         nla_nest_end(skb, data);
4354         genlmsg_end(skb, hdr);
4355         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4356 }
4357 EXPORT_SYMBOL(cfg80211_testmode_event);
4358 #endif
4359
4360 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4361 {
4362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4363         struct net_device *dev = info->user_ptr[1];
4364         struct cfg80211_connect_params connect;
4365         struct wiphy *wiphy;
4366         struct cfg80211_cached_keys *connkeys = NULL;
4367         int err;
4368
4369         memset(&connect, 0, sizeof(connect));
4370
4371         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4372                 return -EINVAL;
4373
4374         if (!info->attrs[NL80211_ATTR_SSID] ||
4375             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4376                 return -EINVAL;
4377
4378         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4379                 connect.auth_type =
4380                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4381                 if (!nl80211_valid_auth_type(connect.auth_type))
4382                         return -EINVAL;
4383         } else
4384                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4385
4386         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4387
4388         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4389                                       NL80211_MAX_NR_CIPHER_SUITES);
4390         if (err)
4391                 return err;
4392
4393         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4394             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4395                 return -EOPNOTSUPP;
4396
4397         wiphy = &rdev->wiphy;
4398
4399         if (info->attrs[NL80211_ATTR_MAC])
4400                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4401         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4402         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4403
4404         if (info->attrs[NL80211_ATTR_IE]) {
4405                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4406                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4407         }
4408
4409         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4410                 connect.channel =
4411                         ieee80211_get_channel(wiphy,
4412                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4413                 if (!connect.channel ||
4414                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4415                         return -EINVAL;
4416         }
4417
4418         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4419                 connkeys = nl80211_parse_connkeys(rdev,
4420                                         info->attrs[NL80211_ATTR_KEYS]);
4421                 if (IS_ERR(connkeys))
4422                         return PTR_ERR(connkeys);
4423         }
4424
4425         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4426         if (err)
4427                 kfree(connkeys);
4428         return err;
4429 }
4430
4431 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4432 {
4433         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4434         struct net_device *dev = info->user_ptr[1];
4435         u16 reason;
4436
4437         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4438                 reason = WLAN_REASON_DEAUTH_LEAVING;
4439         else
4440                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4441
4442         if (reason == 0)
4443                 return -EINVAL;
4444
4445         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4446             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4447                 return -EOPNOTSUPP;
4448
4449         return cfg80211_disconnect(rdev, dev, reason, true);
4450 }
4451
4452 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4453 {
4454         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4455         struct net *net;
4456         int err;
4457         u32 pid;
4458
4459         if (!info->attrs[NL80211_ATTR_PID])
4460                 return -EINVAL;
4461
4462         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4463
4464         net = get_net_ns_by_pid(pid);
4465         if (IS_ERR(net))
4466                 return PTR_ERR(net);
4467
4468         err = 0;
4469
4470         /* check if anything to do */
4471         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4472                 err = cfg80211_switch_netns(rdev, net);
4473
4474         put_net(net);
4475         return err;
4476 }
4477
4478 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4479 {
4480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4481         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4482                         struct cfg80211_pmksa *pmksa) = NULL;
4483         struct net_device *dev = info->user_ptr[1];
4484         struct cfg80211_pmksa pmksa;
4485
4486         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4487
4488         if (!info->attrs[NL80211_ATTR_MAC])
4489                 return -EINVAL;
4490
4491         if (!info->attrs[NL80211_ATTR_PMKID])
4492                 return -EINVAL;
4493
4494         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4495         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4496
4497         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4498             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4499                 return -EOPNOTSUPP;
4500
4501         switch (info->genlhdr->cmd) {
4502         case NL80211_CMD_SET_PMKSA:
4503                 rdev_ops = rdev->ops->set_pmksa;
4504                 break;
4505         case NL80211_CMD_DEL_PMKSA:
4506                 rdev_ops = rdev->ops->del_pmksa;
4507                 break;
4508         default:
4509                 WARN_ON(1);
4510                 break;
4511         }
4512
4513         if (!rdev_ops)
4514                 return -EOPNOTSUPP;
4515
4516         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4517 }
4518
4519 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4520 {
4521         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4522         struct net_device *dev = info->user_ptr[1];
4523
4524         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4525             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4526                 return -EOPNOTSUPP;
4527
4528         if (!rdev->ops->flush_pmksa)
4529                 return -EOPNOTSUPP;
4530
4531         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4532 }
4533
4534 static int nl80211_remain_on_channel(struct sk_buff *skb,
4535                                      struct genl_info *info)
4536 {
4537         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4538         struct net_device *dev = info->user_ptr[1];
4539         struct ieee80211_channel *chan;
4540         struct sk_buff *msg;
4541         void *hdr;
4542         u64 cookie;
4543         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4544         u32 freq, duration;
4545         int err;
4546
4547         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4548             !info->attrs[NL80211_ATTR_DURATION])
4549                 return -EINVAL;
4550
4551         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4552
4553         /*
4554          * We should be on that channel for at least one jiffie,
4555          * and more than 5 seconds seems excessive.
4556          */
4557         if (!duration || !msecs_to_jiffies(duration) ||
4558             duration > rdev->wiphy.max_remain_on_channel_duration)
4559                 return -EINVAL;
4560
4561         if (!rdev->ops->remain_on_channel)
4562                 return -EOPNOTSUPP;
4563
4564         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4565                 channel_type = nla_get_u32(
4566                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4567                 if (channel_type != NL80211_CHAN_NO_HT &&
4568                     channel_type != NL80211_CHAN_HT20 &&
4569                     channel_type != NL80211_CHAN_HT40PLUS &&
4570                     channel_type != NL80211_CHAN_HT40MINUS)
4571                         return -EINVAL;
4572         }
4573
4574         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4575         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4576         if (chan == NULL)
4577                 return -EINVAL;
4578
4579         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4580         if (!msg)
4581                 return -ENOMEM;
4582
4583         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4584                              NL80211_CMD_REMAIN_ON_CHANNEL);
4585
4586         if (IS_ERR(hdr)) {
4587                 err = PTR_ERR(hdr);
4588                 goto free_msg;
4589         }
4590
4591         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4592                                            channel_type, duration, &cookie);
4593
4594         if (err)
4595                 goto free_msg;
4596
4597         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4598
4599         genlmsg_end(msg, hdr);
4600
4601         return genlmsg_reply(msg, info);
4602
4603  nla_put_failure:
4604         err = -ENOBUFS;
4605  free_msg:
4606         nlmsg_free(msg);
4607         return err;
4608 }
4609
4610 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4611                                             struct genl_info *info)
4612 {
4613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4614         struct net_device *dev = info->user_ptr[1];
4615         u64 cookie;
4616
4617         if (!info->attrs[NL80211_ATTR_COOKIE])
4618                 return -EINVAL;
4619
4620         if (!rdev->ops->cancel_remain_on_channel)
4621                 return -EOPNOTSUPP;
4622
4623         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4624
4625         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4626 }
4627
4628 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4629                            u8 *rates, u8 rates_len)
4630 {
4631         u8 i;
4632         u32 mask = 0;
4633
4634         for (i = 0; i < rates_len; i++) {
4635                 int rate = (rates[i] & 0x7f) * 5;
4636                 int ridx;
4637                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4638                         struct ieee80211_rate *srate =
4639                                 &sband->bitrates[ridx];
4640                         if (rate == srate->bitrate) {
4641                                 mask |= 1 << ridx;
4642                                 break;
4643                         }
4644                 }
4645                 if (ridx == sband->n_bitrates)
4646                         return 0; /* rate not found */
4647         }
4648
4649         return mask;
4650 }
4651
4652 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4653         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4654                                     .len = NL80211_MAX_SUPP_RATES },
4655 };
4656
4657 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4658                                        struct genl_info *info)
4659 {
4660         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4661         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4662         struct cfg80211_bitrate_mask mask;
4663         int rem, i;
4664         struct net_device *dev = info->user_ptr[1];
4665         struct nlattr *tx_rates;
4666         struct ieee80211_supported_band *sband;
4667
4668         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4669                 return -EINVAL;
4670
4671         if (!rdev->ops->set_bitrate_mask)
4672                 return -EOPNOTSUPP;
4673
4674         memset(&mask, 0, sizeof(mask));
4675         /* Default to all rates enabled */
4676         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4677                 sband = rdev->wiphy.bands[i];
4678                 mask.control[i].legacy =
4679                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4680         }
4681
4682         /*
4683          * The nested attribute uses enum nl80211_band as the index. This maps
4684          * directly to the enum ieee80211_band values used in cfg80211.
4685          */
4686         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4687         {
4688                 enum ieee80211_band band = nla_type(tx_rates);
4689                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4690                         return -EINVAL;
4691                 sband = rdev->wiphy.bands[band];
4692                 if (sband == NULL)
4693                         return -EINVAL;
4694                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4695                           nla_len(tx_rates), nl80211_txattr_policy);
4696                 if (tb[NL80211_TXRATE_LEGACY]) {
4697                         mask.control[band].legacy = rateset_to_mask(
4698                                 sband,
4699                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4700                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4701                         if (mask.control[band].legacy == 0)
4702                                 return -EINVAL;
4703                 }
4704         }
4705
4706         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4707 }
4708
4709 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4710 {
4711         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4712         struct net_device *dev = info->user_ptr[1];
4713         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4714
4715         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4716                 return -EINVAL;
4717
4718         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4719                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4720
4721         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4722             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4723             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4724             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4725             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4726             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4727             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4728                 return -EOPNOTSUPP;
4729
4730         /* not much point in registering if we can't reply */
4731         if (!rdev->ops->mgmt_tx)
4732                 return -EOPNOTSUPP;
4733
4734         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4735                         frame_type,
4736                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4737                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4738 }
4739
4740 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4741 {
4742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4743         struct net_device *dev = info->user_ptr[1];
4744         struct ieee80211_channel *chan;
4745         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4746         bool channel_type_valid = false;
4747         u32 freq;
4748         int err;
4749         void *hdr;
4750         u64 cookie;
4751         struct sk_buff *msg;
4752         unsigned int wait = 0;
4753         bool offchan;
4754
4755         if (!info->attrs[NL80211_ATTR_FRAME] ||
4756             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4757                 return -EINVAL;
4758
4759         if (!rdev->ops->mgmt_tx)
4760                 return -EOPNOTSUPP;
4761
4762         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4763             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4764             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4765             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4766             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4767             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4768             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4769                 return -EOPNOTSUPP;
4770
4771         if (info->attrs[NL80211_ATTR_DURATION]) {
4772                 if (!rdev->ops->mgmt_tx_cancel_wait)
4773                         return -EINVAL;
4774                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4775         }
4776
4777         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4778                 channel_type = nla_get_u32(
4779                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4780                 if (channel_type != NL80211_CHAN_NO_HT &&
4781                     channel_type != NL80211_CHAN_HT20 &&
4782                     channel_type != NL80211_CHAN_HT40PLUS &&
4783                     channel_type != NL80211_CHAN_HT40MINUS)
4784                         return -EINVAL;
4785                 channel_type_valid = true;
4786         }
4787
4788         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4789
4790         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4791         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4792         if (chan == NULL)
4793                 return -EINVAL;
4794
4795         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4796         if (!msg)
4797                 return -ENOMEM;
4798
4799         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4800                              NL80211_CMD_FRAME);
4801
4802         if (IS_ERR(hdr)) {
4803                 err = PTR_ERR(hdr);
4804                 goto free_msg;
4805         }
4806         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4807                                     channel_type_valid, wait,
4808                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4809                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4810                                     &cookie);
4811         if (err)
4812                 goto free_msg;
4813
4814         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4815
4816         genlmsg_end(msg, hdr);
4817         return genlmsg_reply(msg, info);
4818
4819  nla_put_failure:
4820         err = -ENOBUFS;
4821  free_msg:
4822         nlmsg_free(msg);
4823         return err;
4824 }
4825
4826 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4827 {
4828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4829         struct net_device *dev = info->user_ptr[1];
4830         u64 cookie;
4831
4832         if (!info->attrs[NL80211_ATTR_COOKIE])
4833                 return -EINVAL;
4834
4835         if (!rdev->ops->mgmt_tx_cancel_wait)
4836                 return -EOPNOTSUPP;
4837
4838         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4839             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4840             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4841             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4842             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4843             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4844                 return -EOPNOTSUPP;
4845
4846         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4847
4848         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4849 }
4850
4851 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4852 {
4853         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4854         struct wireless_dev *wdev;
4855         struct net_device *dev = info->user_ptr[1];
4856         u8 ps_state;
4857         bool state;
4858         int err;
4859
4860         if (!info->attrs[NL80211_ATTR_PS_STATE])
4861                 return -EINVAL;
4862
4863         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4864
4865         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4866                 return -EINVAL;
4867
4868         wdev = dev->ieee80211_ptr;
4869
4870         if (!rdev->ops->set_power_mgmt)
4871                 return -EOPNOTSUPP;
4872
4873         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4874
4875         if (state == wdev->ps)
4876                 return 0;
4877
4878         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4879                                         wdev->ps_timeout);
4880         if (!err)
4881                 wdev->ps = state;
4882         return err;
4883 }
4884
4885 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4886 {
4887         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4888         enum nl80211_ps_state ps_state;
4889         struct wireless_dev *wdev;
4890         struct net_device *dev = info->user_ptr[1];
4891         struct sk_buff *msg;
4892         void *hdr;
4893         int err;
4894
4895         wdev = dev->ieee80211_ptr;
4896
4897         if (!rdev->ops->set_power_mgmt)
4898                 return -EOPNOTSUPP;
4899
4900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4901         if (!msg)
4902                 return -ENOMEM;
4903
4904         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4905                              NL80211_CMD_GET_POWER_SAVE);
4906         if (!hdr) {
4907                 err = -ENOBUFS;
4908                 goto free_msg;
4909         }
4910
4911         if (wdev->ps)
4912                 ps_state = NL80211_PS_ENABLED;
4913         else
4914                 ps_state = NL80211_PS_DISABLED;
4915
4916         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4917
4918         genlmsg_end(msg, hdr);
4919         return genlmsg_reply(msg, info);
4920
4921  nla_put_failure:
4922         err = -ENOBUFS;
4923  free_msg:
4924         nlmsg_free(msg);
4925         return err;
4926 }
4927
4928 static struct nla_policy
4929 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4930         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4931         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4932         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4933 };
4934
4935 static int nl80211_set_cqm_rssi(struct genl_info *info,
4936                                 s32 threshold, u32 hysteresis)
4937 {
4938         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4939         struct wireless_dev *wdev;
4940         struct net_device *dev = info->user_ptr[1];
4941
4942         if (threshold > 0)
4943                 return -EINVAL;
4944
4945         wdev = dev->ieee80211_ptr;
4946
4947         if (!rdev->ops->set_cqm_rssi_config)
4948                 return -EOPNOTSUPP;
4949
4950         if (wdev->iftype != NL80211_IFTYPE_STATION &&
4951             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
4952                 return -EOPNOTSUPP;
4953
4954         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4955                                               threshold, hysteresis);
4956 }
4957
4958 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4959 {
4960         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4961         struct nlattr *cqm;
4962         int err;
4963
4964         cqm = info->attrs[NL80211_ATTR_CQM];
4965         if (!cqm) {
4966                 err = -EINVAL;
4967                 goto out;
4968         }
4969
4970         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4971                                nl80211_attr_cqm_policy);
4972         if (err)
4973                 goto out;
4974
4975         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4976             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4977                 s32 threshold;
4978                 u32 hysteresis;
4979                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4980                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4981                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4982         } else
4983                 err = -EINVAL;
4984
4985 out:
4986         return err;
4987 }
4988
4989 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
4990 {
4991         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4992         struct net_device *dev = info->user_ptr[1];
4993         struct mesh_config cfg;
4994         struct mesh_setup setup;
4995         int err;
4996
4997         /* start with default */
4998         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
4999         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5000
5001         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5002                 /* and parse parameters if given */
5003                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5004                 if (err)
5005                         return err;
5006         }
5007
5008         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5009             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5010                 return -EINVAL;
5011
5012         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5013         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5014
5015         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5016                 /* parse additional setup parameters if given */
5017                 err = nl80211_parse_mesh_setup(info, &setup);
5018                 if (err)
5019                         return err;
5020         }
5021
5022         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5023 }
5024
5025 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5026 {
5027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5028         struct net_device *dev = info->user_ptr[1];
5029
5030         return cfg80211_leave_mesh(rdev, dev);
5031 }
5032
5033 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5034 {
5035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5036         struct sk_buff *msg;
5037         void *hdr;
5038
5039         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5040                 return -EOPNOTSUPP;
5041
5042         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5043         if (!msg)
5044                 return -ENOMEM;
5045
5046         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5047                              NL80211_CMD_GET_WOWLAN);
5048         if (!hdr)
5049                 goto nla_put_failure;
5050
5051         if (rdev->wowlan) {
5052                 struct nlattr *nl_wowlan;
5053
5054                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5055                 if (!nl_wowlan)
5056                         goto nla_put_failure;
5057
5058                 if (rdev->wowlan->any)
5059                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5060                 if (rdev->wowlan->disconnect)
5061                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5062                 if (rdev->wowlan->magic_pkt)
5063                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5064                 if (rdev->wowlan->n_patterns) {
5065                         struct nlattr *nl_pats, *nl_pat;
5066                         int i, pat_len;
5067
5068                         nl_pats = nla_nest_start(msg,
5069                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5070                         if (!nl_pats)
5071                                 goto nla_put_failure;
5072
5073                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5074                                 nl_pat = nla_nest_start(msg, i + 1);
5075                                 if (!nl_pat)
5076                                         goto nla_put_failure;
5077                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5078                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5079                                         DIV_ROUND_UP(pat_len, 8),
5080                                         rdev->wowlan->patterns[i].mask);
5081                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5082                                         pat_len,
5083                                         rdev->wowlan->patterns[i].pattern);
5084                                 nla_nest_end(msg, nl_pat);
5085                         }
5086                         nla_nest_end(msg, nl_pats);
5087                 }
5088
5089                 nla_nest_end(msg, nl_wowlan);
5090         }
5091
5092         genlmsg_end(msg, hdr);
5093         return genlmsg_reply(msg, info);
5094
5095 nla_put_failure:
5096         nlmsg_free(msg);
5097         return -ENOBUFS;
5098 }
5099
5100 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5101 {
5102         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5103         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5104         struct cfg80211_wowlan no_triggers = {};
5105         struct cfg80211_wowlan new_triggers = {};
5106         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5107         int err, i;
5108
5109         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5110                 return -EOPNOTSUPP;
5111
5112         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5113                 goto no_triggers;
5114
5115         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5116                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5117                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5118                         nl80211_wowlan_policy);
5119         if (err)
5120                 return err;
5121
5122         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
5123                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
5124                         return -EINVAL;
5125                 new_triggers.any = true;
5126         }
5127
5128         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
5129                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
5130                         return -EINVAL;
5131                 new_triggers.disconnect = true;
5132         }
5133
5134         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
5135                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
5136                         return -EINVAL;
5137                 new_triggers.magic_pkt = true;
5138         }
5139
5140         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
5141                 struct nlattr *pat;
5142                 int n_patterns = 0;
5143                 int rem, pat_len, mask_len;
5144                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
5145
5146                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5147                                     rem)
5148                         n_patterns++;
5149                 if (n_patterns > wowlan->n_patterns)
5150                         return -EINVAL;
5151
5152                 new_triggers.patterns = kcalloc(n_patterns,
5153                                                 sizeof(new_triggers.patterns[0]),
5154                                                 GFP_KERNEL);
5155                 if (!new_triggers.patterns)
5156                         return -ENOMEM;
5157
5158                 new_triggers.n_patterns = n_patterns;
5159                 i = 0;
5160
5161                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5162                                     rem) {
5163                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
5164                                   nla_data(pat), nla_len(pat), NULL);
5165                         err = -EINVAL;
5166                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
5167                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
5168                                 goto error;
5169                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
5170                         mask_len = DIV_ROUND_UP(pat_len, 8);
5171                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
5172                             mask_len)
5173                                 goto error;
5174                         if (pat_len > wowlan->pattern_max_len ||
5175                             pat_len < wowlan->pattern_min_len)
5176                                 goto error;
5177
5178                         new_triggers.patterns[i].mask =
5179                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
5180                         if (!new_triggers.patterns[i].mask) {
5181                                 err = -ENOMEM;
5182                                 goto error;
5183                         }
5184                         new_triggers.patterns[i].pattern =
5185                                 new_triggers.patterns[i].mask + mask_len;
5186                         memcpy(new_triggers.patterns[i].mask,
5187                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
5188                                mask_len);
5189                         new_triggers.patterns[i].pattern_len = pat_len;
5190                         memcpy(new_triggers.patterns[i].pattern,
5191                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
5192                                pat_len);
5193                         i++;
5194                 }
5195         }
5196
5197         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
5198                 struct cfg80211_wowlan *ntrig;
5199                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
5200                                 GFP_KERNEL);
5201                 if (!ntrig) {
5202                         err = -ENOMEM;
5203                         goto error;
5204                 }
5205                 cfg80211_rdev_free_wowlan(rdev);
5206                 rdev->wowlan = ntrig;
5207         } else {
5208  no_triggers:
5209                 cfg80211_rdev_free_wowlan(rdev);
5210                 rdev->wowlan = NULL;
5211         }
5212
5213         return 0;
5214  error:
5215         for (i = 0; i < new_triggers.n_patterns; i++)
5216                 kfree(new_triggers.patterns[i].mask);
5217         kfree(new_triggers.patterns);
5218         return err;
5219 }
5220
5221 #define NL80211_FLAG_NEED_WIPHY         0x01
5222 #define NL80211_FLAG_NEED_NETDEV        0x02
5223 #define NL80211_FLAG_NEED_RTNL          0x04
5224 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
5225 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
5226                                          NL80211_FLAG_CHECK_NETDEV_UP)
5227
5228 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
5229                             struct genl_info *info)
5230 {
5231         struct cfg80211_registered_device *rdev;
5232         struct net_device *dev;
5233         int err;
5234         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
5235
5236         if (rtnl)
5237                 rtnl_lock();
5238
5239         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
5240                 rdev = cfg80211_get_dev_from_info(info);
5241                 if (IS_ERR(rdev)) {
5242                         if (rtnl)
5243                                 rtnl_unlock();
5244                         return PTR_ERR(rdev);
5245                 }
5246                 info->user_ptr[0] = rdev;
5247         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
5248                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5249                 if (err) {
5250                         if (rtnl)
5251                                 rtnl_unlock();
5252                         return err;
5253                 }
5254                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
5255                     !netif_running(dev)) {
5256                         cfg80211_unlock_rdev(rdev);
5257                         dev_put(dev);
5258                         if (rtnl)
5259                                 rtnl_unlock();
5260                         return -ENETDOWN;
5261                 }
5262                 info->user_ptr[0] = rdev;
5263                 info->user_ptr[1] = dev;
5264         }
5265
5266         return 0;
5267 }
5268
5269 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
5270                               struct genl_info *info)
5271 {
5272         if (info->user_ptr[0])
5273                 cfg80211_unlock_rdev(info->user_ptr[0]);
5274         if (info->user_ptr[1])
5275                 dev_put(info->user_ptr[1]);
5276         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
5277                 rtnl_unlock();
5278 }
5279
5280 static struct genl_ops nl80211_ops[] = {
5281         {
5282                 .cmd = NL80211_CMD_GET_WIPHY,
5283                 .doit = nl80211_get_wiphy,
5284                 .dumpit = nl80211_dump_wiphy,
5285                 .policy = nl80211_policy,
5286                 /* can be retrieved by unprivileged users */
5287                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
5288         },
5289         {
5290                 .cmd = NL80211_CMD_SET_WIPHY,
5291                 .doit = nl80211_set_wiphy,
5292                 .policy = nl80211_policy,
5293                 .flags = GENL_ADMIN_PERM,
5294                 .internal_flags = NL80211_FLAG_NEED_RTNL,
5295         },
5296         {
5297                 .cmd = NL80211_CMD_GET_INTERFACE,
5298                 .doit = nl80211_get_interface,
5299                 .dumpit = nl80211_dump_interface,
5300                 .policy = nl80211_policy,
5301                 /* can be retrieved by unprivileged users */
5302                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
5303         },
5304         {
5305                 .cmd = NL80211_CMD_SET_INTERFACE,
5306                 .doit = nl80211_set_interface,
5307                 .policy = nl80211_policy,
5308                 .flags = GENL_ADMIN_PERM,
5309                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5310                                   NL80211_FLAG_NEED_RTNL,
5311         },
5312         {
5313                 .cmd = NL80211_CMD_NEW_INTERFACE,
5314                 .doit = nl80211_new_interface,
5315                 .policy = nl80211_policy,
5316                 .flags = GENL_ADMIN_PERM,
5317                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5318                                   NL80211_FLAG_NEED_RTNL,
5319         },
5320         {
5321                 .cmd = NL80211_CMD_DEL_INTERFACE,
5322                 .doit = nl80211_del_interface,
5323                 .policy = nl80211_policy,
5324                 .flags = GENL_ADMIN_PERM,
5325                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5326                                   NL80211_FLAG_NEED_RTNL,
5327         },
5328         {
5329                 .cmd = NL80211_CMD_GET_KEY,
5330                 .doit = nl80211_get_key,
5331                 .policy = nl80211_policy,
5332                 .flags = GENL_ADMIN_PERM,
5333                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5334                                   NL80211_FLAG_NEED_RTNL,
5335         },
5336         {
5337                 .cmd = NL80211_CMD_SET_KEY,
5338                 .doit = nl80211_set_key,
5339                 .policy = nl80211_policy,
5340                 .flags = GENL_ADMIN_PERM,
5341                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5342                                   NL80211_FLAG_NEED_RTNL,
5343         },
5344         {
5345                 .cmd = NL80211_CMD_NEW_KEY,
5346                 .doit = nl80211_new_key,
5347                 .policy = nl80211_policy,
5348                 .flags = GENL_ADMIN_PERM,
5349                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5350                                   NL80211_FLAG_NEED_RTNL,
5351         },
5352         {
5353                 .cmd = NL80211_CMD_DEL_KEY,
5354                 .doit = nl80211_del_key,
5355                 .policy = nl80211_policy,
5356                 .flags = GENL_ADMIN_PERM,
5357                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5358                                   NL80211_FLAG_NEED_RTNL,
5359         },
5360         {
5361                 .cmd = NL80211_CMD_SET_BEACON,
5362                 .policy = nl80211_policy,
5363                 .flags = GENL_ADMIN_PERM,
5364                 .doit = nl80211_addset_beacon,
5365                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5366                                   NL80211_FLAG_NEED_RTNL,
5367         },
5368         {
5369                 .cmd = NL80211_CMD_NEW_BEACON,
5370                 .policy = nl80211_policy,
5371                 .flags = GENL_ADMIN_PERM,
5372                 .doit = nl80211_addset_beacon,
5373                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5374                                   NL80211_FLAG_NEED_RTNL,
5375         },
5376         {
5377                 .cmd = NL80211_CMD_DEL_BEACON,
5378                 .policy = nl80211_policy,
5379                 .flags = GENL_ADMIN_PERM,
5380                 .doit = nl80211_del_beacon,
5381                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5382                                   NL80211_FLAG_NEED_RTNL,
5383         },
5384         {
5385                 .cmd = NL80211_CMD_GET_STATION,
5386                 .doit = nl80211_get_station,
5387                 .dumpit = nl80211_dump_station,
5388                 .policy = nl80211_policy,
5389                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5390                                   NL80211_FLAG_NEED_RTNL,
5391         },
5392         {
5393                 .cmd = NL80211_CMD_SET_STATION,
5394                 .doit = nl80211_set_station,
5395                 .policy = nl80211_policy,
5396                 .flags = GENL_ADMIN_PERM,
5397                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5398                                   NL80211_FLAG_NEED_RTNL,
5399         },
5400         {
5401                 .cmd = NL80211_CMD_NEW_STATION,
5402                 .doit = nl80211_new_station,
5403                 .policy = nl80211_policy,
5404                 .flags = GENL_ADMIN_PERM,
5405                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5406                                   NL80211_FLAG_NEED_RTNL,
5407         },
5408         {
5409                 .cmd = NL80211_CMD_DEL_STATION,
5410                 .doit = nl80211_del_station,
5411                 .policy = nl80211_policy,
5412                 .flags = GENL_ADMIN_PERM,
5413                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5414                                   NL80211_FLAG_NEED_RTNL,
5415         },
5416         {
5417                 .cmd = NL80211_CMD_GET_MPATH,
5418                 .doit = nl80211_get_mpath,
5419                 .dumpit = nl80211_dump_mpath,
5420                 .policy = nl80211_policy,
5421                 .flags = GENL_ADMIN_PERM,
5422                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5423                                   NL80211_FLAG_NEED_RTNL,
5424         },
5425         {
5426                 .cmd = NL80211_CMD_SET_MPATH,
5427                 .doit = nl80211_set_mpath,
5428                 .policy = nl80211_policy,
5429                 .flags = GENL_ADMIN_PERM,
5430                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5431                                   NL80211_FLAG_NEED_RTNL,
5432         },
5433         {
5434                 .cmd = NL80211_CMD_NEW_MPATH,
5435                 .doit = nl80211_new_mpath,
5436                 .policy = nl80211_policy,
5437                 .flags = GENL_ADMIN_PERM,
5438                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5439                                   NL80211_FLAG_NEED_RTNL,
5440         },
5441         {
5442                 .cmd = NL80211_CMD_DEL_MPATH,
5443                 .doit = nl80211_del_mpath,
5444                 .policy = nl80211_policy,
5445                 .flags = GENL_ADMIN_PERM,
5446                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5447                                   NL80211_FLAG_NEED_RTNL,
5448         },
5449         {
5450                 .cmd = NL80211_CMD_SET_BSS,
5451                 .doit = nl80211_set_bss,
5452                 .policy = nl80211_policy,
5453                 .flags = GENL_ADMIN_PERM,
5454                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5455                                   NL80211_FLAG_NEED_RTNL,
5456         },
5457         {
5458                 .cmd = NL80211_CMD_GET_REG,
5459                 .doit = nl80211_get_reg,
5460                 .policy = nl80211_policy,
5461                 /* can be retrieved by unprivileged users */
5462         },
5463         {
5464                 .cmd = NL80211_CMD_SET_REG,
5465                 .doit = nl80211_set_reg,
5466                 .policy = nl80211_policy,
5467                 .flags = GENL_ADMIN_PERM,
5468         },
5469         {
5470                 .cmd = NL80211_CMD_REQ_SET_REG,
5471                 .doit = nl80211_req_set_reg,
5472                 .policy = nl80211_policy,
5473                 .flags = GENL_ADMIN_PERM,
5474         },
5475         {
5476                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
5477                 .doit = nl80211_get_mesh_config,
5478                 .policy = nl80211_policy,
5479                 /* can be retrieved by unprivileged users */
5480                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5481                                   NL80211_FLAG_NEED_RTNL,
5482         },
5483         {
5484                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
5485                 .doit = nl80211_update_mesh_config,
5486                 .policy = nl80211_policy,
5487                 .flags = GENL_ADMIN_PERM,
5488                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5489                                   NL80211_FLAG_NEED_RTNL,
5490         },
5491         {
5492                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5493                 .doit = nl80211_trigger_scan,
5494                 .policy = nl80211_policy,
5495                 .flags = GENL_ADMIN_PERM,
5496                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5497                                   NL80211_FLAG_NEED_RTNL,
5498         },
5499         {
5500                 .cmd = NL80211_CMD_GET_SCAN,
5501                 .policy = nl80211_policy,
5502                 .dumpit = nl80211_dump_scan,
5503         },
5504         {
5505                 .cmd = NL80211_CMD_START_SCHED_SCAN,
5506                 .doit = nl80211_start_sched_scan,
5507                 .policy = nl80211_policy,
5508                 .flags = GENL_ADMIN_PERM,
5509                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5510                                   NL80211_FLAG_NEED_RTNL,
5511         },
5512         {
5513                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
5514                 .doit = nl80211_stop_sched_scan,
5515                 .policy = nl80211_policy,
5516                 .flags = GENL_ADMIN_PERM,
5517                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5518                                   NL80211_FLAG_NEED_RTNL,
5519         },
5520         {
5521                 .cmd = NL80211_CMD_AUTHENTICATE,
5522                 .doit = nl80211_authenticate,
5523                 .policy = nl80211_policy,
5524                 .flags = GENL_ADMIN_PERM,
5525                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5526                                   NL80211_FLAG_NEED_RTNL,
5527         },
5528         {
5529                 .cmd = NL80211_CMD_ASSOCIATE,
5530                 .doit = nl80211_associate,
5531                 .policy = nl80211_policy,
5532                 .flags = GENL_ADMIN_PERM,
5533                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5534                                   NL80211_FLAG_NEED_RTNL,
5535         },
5536         {
5537                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5538                 .doit = nl80211_deauthenticate,
5539                 .policy = nl80211_policy,
5540                 .flags = GENL_ADMIN_PERM,
5541                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5542                                   NL80211_FLAG_NEED_RTNL,
5543         },
5544         {
5545                 .cmd = NL80211_CMD_DISASSOCIATE,
5546                 .doit = nl80211_disassociate,
5547                 .policy = nl80211_policy,
5548                 .flags = GENL_ADMIN_PERM,
5549                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5550                                   NL80211_FLAG_NEED_RTNL,
5551         },
5552         {
5553                 .cmd = NL80211_CMD_JOIN_IBSS,
5554                 .doit = nl80211_join_ibss,
5555                 .policy = nl80211_policy,
5556                 .flags = GENL_ADMIN_PERM,
5557                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5558                                   NL80211_FLAG_NEED_RTNL,
5559         },
5560         {
5561                 .cmd = NL80211_CMD_LEAVE_IBSS,
5562                 .doit = nl80211_leave_ibss,
5563                 .policy = nl80211_policy,
5564                 .flags = GENL_ADMIN_PERM,
5565                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5566                                   NL80211_FLAG_NEED_RTNL,
5567         },
5568 #ifdef CONFIG_NL80211_TESTMODE
5569         {
5570                 .cmd = NL80211_CMD_TESTMODE,
5571                 .doit = nl80211_testmode_do,
5572                 .policy = nl80211_policy,
5573                 .flags = GENL_ADMIN_PERM,
5574                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5575                                   NL80211_FLAG_NEED_RTNL,
5576         },
5577 #endif
5578         {
5579                 .cmd = NL80211_CMD_CONNECT,
5580                 .doit = nl80211_connect,
5581                 .policy = nl80211_policy,
5582                 .flags = GENL_ADMIN_PERM,
5583                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5584                                   NL80211_FLAG_NEED_RTNL,
5585         },
5586         {
5587                 .cmd = NL80211_CMD_DISCONNECT,
5588                 .doit = nl80211_disconnect,
5589                 .policy = nl80211_policy,
5590                 .flags = GENL_ADMIN_PERM,
5591                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5592                                   NL80211_FLAG_NEED_RTNL,
5593         },
5594         {
5595                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5596                 .doit = nl80211_wiphy_netns,
5597                 .policy = nl80211_policy,
5598                 .flags = GENL_ADMIN_PERM,
5599                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5600                                   NL80211_FLAG_NEED_RTNL,
5601         },
5602         {
5603                 .cmd = NL80211_CMD_GET_SURVEY,
5604                 .policy = nl80211_policy,
5605                 .dumpit = nl80211_dump_survey,
5606         },
5607         {
5608                 .cmd = NL80211_CMD_SET_PMKSA,
5609                 .doit = nl80211_setdel_pmksa,
5610                 .policy = nl80211_policy,
5611                 .flags = GENL_ADMIN_PERM,
5612                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5613                                   NL80211_FLAG_NEED_RTNL,
5614         },
5615         {
5616                 .cmd = NL80211_CMD_DEL_PMKSA,
5617                 .doit = nl80211_setdel_pmksa,
5618                 .policy = nl80211_policy,
5619                 .flags = GENL_ADMIN_PERM,
5620                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5621                                   NL80211_FLAG_NEED_RTNL,
5622         },
5623         {
5624                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5625                 .doit = nl80211_flush_pmksa,
5626                 .policy = nl80211_policy,
5627                 .flags = GENL_ADMIN_PERM,
5628                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5629                                   NL80211_FLAG_NEED_RTNL,
5630         },
5631         {
5632                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5633                 .doit = nl80211_remain_on_channel,
5634                 .policy = nl80211_policy,
5635                 .flags = GENL_ADMIN_PERM,
5636                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5637                                   NL80211_FLAG_NEED_RTNL,
5638         },
5639         {
5640                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5641                 .doit = nl80211_cancel_remain_on_channel,
5642                 .policy = nl80211_policy,
5643                 .flags = GENL_ADMIN_PERM,
5644                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5645                                   NL80211_FLAG_NEED_RTNL,
5646         },
5647         {
5648                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5649                 .doit = nl80211_set_tx_bitrate_mask,
5650                 .policy = nl80211_policy,
5651                 .flags = GENL_ADMIN_PERM,
5652                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5653                                   NL80211_FLAG_NEED_RTNL,
5654         },
5655         {
5656                 .cmd = NL80211_CMD_REGISTER_FRAME,
5657                 .doit = nl80211_register_mgmt,
5658                 .policy = nl80211_policy,
5659                 .flags = GENL_ADMIN_PERM,
5660                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5661                                   NL80211_FLAG_NEED_RTNL,
5662         },
5663         {
5664                 .cmd = NL80211_CMD_FRAME,
5665                 .doit = nl80211_tx_mgmt,
5666                 .policy = nl80211_policy,
5667                 .flags = GENL_ADMIN_PERM,
5668                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5669                                   NL80211_FLAG_NEED_RTNL,
5670         },
5671         {
5672                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5673                 .doit = nl80211_tx_mgmt_cancel_wait,
5674                 .policy = nl80211_policy,
5675                 .flags = GENL_ADMIN_PERM,
5676                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5677                                   NL80211_FLAG_NEED_RTNL,
5678         },
5679         {
5680                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5681                 .doit = nl80211_set_power_save,
5682                 .policy = nl80211_policy,
5683                 .flags = GENL_ADMIN_PERM,
5684                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5685                                   NL80211_FLAG_NEED_RTNL,
5686         },
5687         {
5688                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5689                 .doit = nl80211_get_power_save,
5690                 .policy = nl80211_policy,
5691                 /* can be retrieved by unprivileged users */
5692                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5693                                   NL80211_FLAG_NEED_RTNL,
5694         },
5695         {
5696                 .cmd = NL80211_CMD_SET_CQM,
5697                 .doit = nl80211_set_cqm,
5698                 .policy = nl80211_policy,
5699                 .flags = GENL_ADMIN_PERM,
5700                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5701                                   NL80211_FLAG_NEED_RTNL,
5702         },
5703         {
5704                 .cmd = NL80211_CMD_SET_CHANNEL,
5705                 .doit = nl80211_set_channel,
5706                 .policy = nl80211_policy,
5707                 .flags = GENL_ADMIN_PERM,
5708                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5709                                   NL80211_FLAG_NEED_RTNL,
5710         },
5711         {
5712                 .cmd = NL80211_CMD_SET_WDS_PEER,
5713                 .doit = nl80211_set_wds_peer,
5714                 .policy = nl80211_policy,
5715                 .flags = GENL_ADMIN_PERM,
5716                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5717                                   NL80211_FLAG_NEED_RTNL,
5718         },
5719         {
5720                 .cmd = NL80211_CMD_JOIN_MESH,
5721                 .doit = nl80211_join_mesh,
5722                 .policy = nl80211_policy,
5723                 .flags = GENL_ADMIN_PERM,
5724                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5725                                   NL80211_FLAG_NEED_RTNL,
5726         },
5727         {
5728                 .cmd = NL80211_CMD_LEAVE_MESH,
5729                 .doit = nl80211_leave_mesh,
5730                 .policy = nl80211_policy,
5731                 .flags = GENL_ADMIN_PERM,
5732                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5733                                   NL80211_FLAG_NEED_RTNL,
5734         },
5735         {
5736                 .cmd = NL80211_CMD_GET_WOWLAN,
5737                 .doit = nl80211_get_wowlan,
5738                 .policy = nl80211_policy,
5739                 /* can be retrieved by unprivileged users */
5740                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5741                                   NL80211_FLAG_NEED_RTNL,
5742         },
5743         {
5744                 .cmd = NL80211_CMD_SET_WOWLAN,
5745                 .doit = nl80211_set_wowlan,
5746                 .policy = nl80211_policy,
5747                 .flags = GENL_ADMIN_PERM,
5748                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5749                                   NL80211_FLAG_NEED_RTNL,
5750         },
5751 };
5752
5753 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5754         .name = "mlme",
5755 };
5756
5757 /* multicast groups */
5758 static struct genl_multicast_group nl80211_config_mcgrp = {
5759         .name = "config",
5760 };
5761 static struct genl_multicast_group nl80211_scan_mcgrp = {
5762         .name = "scan",
5763 };
5764 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5765         .name = "regulatory",
5766 };
5767
5768 /* notification functions */
5769
5770 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5771 {
5772         struct sk_buff *msg;
5773
5774         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5775         if (!msg)
5776                 return;
5777
5778         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5779                 nlmsg_free(msg);
5780                 return;
5781         }
5782
5783         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5784                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5785 }
5786
5787 static int nl80211_add_scan_req(struct sk_buff *msg,
5788                                 struct cfg80211_registered_device *rdev)
5789 {
5790         struct cfg80211_scan_request *req = rdev->scan_req;
5791         struct nlattr *nest;
5792         int i;
5793
5794         ASSERT_RDEV_LOCK(rdev);
5795
5796         if (WARN_ON(!req))
5797                 return 0;
5798
5799         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5800         if (!nest)
5801                 goto nla_put_failure;
5802         for (i = 0; i < req->n_ssids; i++)
5803                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5804         nla_nest_end(msg, nest);
5805
5806         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5807         if (!nest)
5808                 goto nla_put_failure;
5809         for (i = 0; i < req->n_channels; i++)
5810                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5811         nla_nest_end(msg, nest);
5812
5813         if (req->ie)
5814                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5815
5816         return 0;
5817  nla_put_failure:
5818         return -ENOBUFS;
5819 }
5820
5821 static int nl80211_send_scan_msg(struct sk_buff *msg,
5822                                  struct cfg80211_registered_device *rdev,
5823                                  struct net_device *netdev,
5824                                  u32 pid, u32 seq, int flags,
5825                                  u32 cmd)
5826 {
5827         void *hdr;
5828
5829         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5830         if (!hdr)
5831                 return -1;
5832
5833         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5834         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5835
5836         /* ignore errors and send incomplete event anyway */
5837         nl80211_add_scan_req(msg, rdev);
5838
5839         return genlmsg_end(msg, hdr);
5840
5841  nla_put_failure:
5842         genlmsg_cancel(msg, hdr);
5843         return -EMSGSIZE;
5844 }
5845
5846 static int
5847 nl80211_send_sched_scan_msg(struct sk_buff *msg,
5848                             struct cfg80211_registered_device *rdev,
5849                             struct net_device *netdev,
5850                             u32 pid, u32 seq, int flags, u32 cmd)
5851 {
5852         void *hdr;
5853
5854         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5855         if (!hdr)
5856                 return -1;
5857
5858         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5859         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5860
5861         return genlmsg_end(msg, hdr);
5862
5863  nla_put_failure:
5864         genlmsg_cancel(msg, hdr);
5865         return -EMSGSIZE;
5866 }
5867
5868 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5869                              struct net_device *netdev)
5870 {
5871         struct sk_buff *msg;
5872
5873         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5874         if (!msg)
5875                 return;
5876
5877         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5878                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5879                 nlmsg_free(msg);
5880                 return;
5881         }
5882
5883         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5884                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5885 }
5886
5887 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5888                             struct net_device *netdev)
5889 {
5890         struct sk_buff *msg;
5891
5892         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5893         if (!msg)
5894                 return;
5895
5896         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5897                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5898                 nlmsg_free(msg);
5899                 return;
5900         }
5901
5902         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5903                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5904 }
5905
5906 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5907                                struct net_device *netdev)
5908 {
5909         struct sk_buff *msg;
5910
5911         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5912         if (!msg)
5913                 return;
5914
5915         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5916                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5917                 nlmsg_free(msg);
5918                 return;
5919         }
5920
5921         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5922                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5923 }
5924
5925 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
5926                                      struct net_device *netdev)
5927 {
5928         struct sk_buff *msg;
5929
5930         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5931         if (!msg)
5932                 return;
5933
5934         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
5935                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
5936                 nlmsg_free(msg);
5937                 return;
5938         }
5939
5940         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5941                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5942 }
5943
5944 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
5945                              struct net_device *netdev, u32 cmd)
5946 {
5947         struct sk_buff *msg;
5948
5949         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5950         if (!msg)
5951                 return;
5952
5953         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
5954                 nlmsg_free(msg);
5955                 return;
5956         }
5957
5958         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5959                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5960 }
5961
5962 /*
5963  * This can happen on global regulatory changes or device specific settings
5964  * based on custom world regulatory domains.
5965  */
5966 void nl80211_send_reg_change_event(struct regulatory_request *request)
5967 {
5968         struct sk_buff *msg;
5969         void *hdr;
5970
5971         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5972         if (!msg)
5973                 return;
5974
5975         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5976         if (!hdr) {
5977                 nlmsg_free(msg);
5978                 return;
5979         }
5980
5981         /* Userspace can always count this one always being set */
5982         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5983
5984         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5985                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5986                            NL80211_REGDOM_TYPE_WORLD);
5987         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5988                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5989                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5990         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5991                  request->intersect)
5992                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5993                            NL80211_REGDOM_TYPE_INTERSECTION);
5994         else {
5995                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5996                            NL80211_REGDOM_TYPE_COUNTRY);
5997                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5998         }
5999
6000         if (wiphy_idx_valid(request->wiphy_idx))
6001                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
6002
6003         if (genlmsg_end(msg, hdr) < 0) {
6004                 nlmsg_free(msg);
6005                 return;
6006         }
6007
6008         rcu_read_lock();
6009         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6010                                 GFP_ATOMIC);
6011         rcu_read_unlock();
6012
6013         return;
6014
6015 nla_put_failure:
6016         genlmsg_cancel(msg, hdr);
6017         nlmsg_free(msg);
6018 }
6019
6020 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
6021                                     struct net_device *netdev,
6022                                     const u8 *buf, size_t len,
6023                                     enum nl80211_commands cmd, gfp_t gfp)
6024 {
6025         struct sk_buff *msg;
6026         void *hdr;
6027
6028         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6029         if (!msg)
6030                 return;
6031
6032         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6033         if (!hdr) {
6034                 nlmsg_free(msg);
6035                 return;
6036         }
6037
6038         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6039         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6040         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6041
6042         if (genlmsg_end(msg, hdr) < 0) {
6043                 nlmsg_free(msg);
6044                 return;
6045         }
6046
6047         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6048                                 nl80211_mlme_mcgrp.id, gfp);
6049         return;
6050
6051  nla_put_failure:
6052         genlmsg_cancel(msg, hdr);
6053         nlmsg_free(msg);
6054 }
6055
6056 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
6057                           struct net_device *netdev, const u8 *buf,
6058                           size_t len, gfp_t gfp)
6059 {
6060         nl80211_send_mlme_event(rdev, netdev, buf, len,
6061                                 NL80211_CMD_AUTHENTICATE, gfp);
6062 }
6063
6064 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
6065                            struct net_device *netdev, const u8 *buf,
6066                            size_t len, gfp_t gfp)
6067 {
6068         nl80211_send_mlme_event(rdev, netdev, buf, len,
6069                                 NL80211_CMD_ASSOCIATE, gfp);
6070 }
6071
6072 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
6073                          struct net_device *netdev, const u8 *buf,
6074                          size_t len, gfp_t gfp)
6075 {
6076         nl80211_send_mlme_event(rdev, netdev, buf, len,
6077                                 NL80211_CMD_DEAUTHENTICATE, gfp);
6078 }
6079
6080 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
6081                            struct net_device *netdev, const u8 *buf,
6082                            size_t len, gfp_t gfp)
6083 {
6084         nl80211_send_mlme_event(rdev, netdev, buf, len,
6085                                 NL80211_CMD_DISASSOCIATE, gfp);
6086 }
6087
6088 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
6089                                 struct net_device *netdev, const u8 *buf,
6090                                 size_t len, gfp_t gfp)
6091 {
6092         nl80211_send_mlme_event(rdev, netdev, buf, len,
6093                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
6094 }
6095
6096 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
6097                                   struct net_device *netdev, const u8 *buf,
6098                                   size_t len, gfp_t gfp)
6099 {
6100         nl80211_send_mlme_event(rdev, netdev, buf, len,
6101                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
6102 }
6103
6104 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
6105                                       struct net_device *netdev, int cmd,
6106                                       const u8 *addr, gfp_t gfp)
6107 {
6108         struct sk_buff *msg;
6109         void *hdr;
6110
6111         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6112         if (!msg)
6113                 return;
6114
6115         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6116         if (!hdr) {
6117                 nlmsg_free(msg);
6118                 return;
6119         }
6120
6121         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6122         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6123         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
6124         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6125
6126         if (genlmsg_end(msg, hdr) < 0) {
6127                 nlmsg_free(msg);
6128                 return;
6129         }
6130
6131         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6132                                 nl80211_mlme_mcgrp.id, gfp);
6133         return;
6134
6135  nla_put_failure:
6136         genlmsg_cancel(msg, hdr);
6137         nlmsg_free(msg);
6138 }
6139
6140 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
6141                                struct net_device *netdev, const u8 *addr,
6142                                gfp_t gfp)
6143 {
6144         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
6145                                   addr, gfp);
6146 }
6147
6148 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
6149                                 struct net_device *netdev, const u8 *addr,
6150                                 gfp_t gfp)
6151 {
6152         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
6153                                   addr, gfp);
6154 }
6155
6156 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
6157                                  struct net_device *netdev, const u8 *bssid,
6158                                  const u8 *req_ie, size_t req_ie_len,
6159                                  const u8 *resp_ie, size_t resp_ie_len,
6160                                  u16 status, gfp_t gfp)
6161 {
6162         struct sk_buff *msg;
6163         void *hdr;
6164
6165         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6166         if (!msg)
6167                 return;
6168
6169         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
6170         if (!hdr) {
6171                 nlmsg_free(msg);
6172                 return;
6173         }
6174
6175         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6176         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6177         if (bssid)
6178                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6179         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
6180         if (req_ie)
6181                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6182         if (resp_ie)
6183                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6184
6185         if (genlmsg_end(msg, hdr) < 0) {
6186                 nlmsg_free(msg);
6187                 return;
6188         }
6189
6190         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6191                                 nl80211_mlme_mcgrp.id, gfp);
6192         return;
6193
6194  nla_put_failure:
6195         genlmsg_cancel(msg, hdr);
6196         nlmsg_free(msg);
6197
6198 }
6199
6200 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
6201                          struct net_device *netdev, const u8 *bssid,
6202                          const u8 *req_ie, size_t req_ie_len,
6203                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
6204 {
6205         struct sk_buff *msg;
6206         void *hdr;
6207
6208         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6209         if (!msg)
6210                 return;
6211
6212         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
6213         if (!hdr) {
6214                 nlmsg_free(msg);
6215                 return;
6216         }
6217
6218         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6219         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6220         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6221         if (req_ie)
6222                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6223         if (resp_ie)
6224                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6225
6226         if (genlmsg_end(msg, hdr) < 0) {
6227                 nlmsg_free(msg);
6228                 return;
6229         }
6230
6231         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6232                                 nl80211_mlme_mcgrp.id, gfp);
6233         return;
6234
6235  nla_put_failure:
6236         genlmsg_cancel(msg, hdr);
6237         nlmsg_free(msg);
6238
6239 }
6240
6241 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
6242                                struct net_device *netdev, u16 reason,
6243                                const u8 *ie, size_t ie_len, bool from_ap)
6244 {
6245         struct sk_buff *msg;
6246         void *hdr;
6247
6248         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6249         if (!msg)
6250                 return;
6251
6252         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
6253         if (!hdr) {
6254                 nlmsg_free(msg);
6255                 return;
6256         }
6257
6258         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6259         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6260         if (from_ap && reason)
6261                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
6262         if (from_ap)
6263                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
6264         if (ie)
6265                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
6266
6267         if (genlmsg_end(msg, hdr) < 0) {
6268                 nlmsg_free(msg);
6269                 return;
6270         }
6271
6272         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6273                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
6274         return;
6275
6276  nla_put_failure:
6277         genlmsg_cancel(msg, hdr);
6278         nlmsg_free(msg);
6279
6280 }
6281
6282 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
6283                              struct net_device *netdev, const u8 *bssid,
6284                              gfp_t gfp)
6285 {
6286         struct sk_buff *msg;
6287         void *hdr;
6288
6289         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6290         if (!msg)
6291                 return;
6292
6293         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
6294         if (!hdr) {
6295                 nlmsg_free(msg);
6296                 return;
6297         }
6298
6299         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6300         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6301         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6302
6303         if (genlmsg_end(msg, hdr) < 0) {
6304                 nlmsg_free(msg);
6305                 return;
6306         }
6307
6308         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6309                                 nl80211_mlme_mcgrp.id, gfp);
6310         return;
6311
6312  nla_put_failure:
6313         genlmsg_cancel(msg, hdr);
6314         nlmsg_free(msg);
6315 }
6316
6317 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
6318                 struct net_device *netdev,
6319                 const u8 *macaddr, const u8* ie, u8 ie_len,
6320                 gfp_t gfp)
6321 {
6322         struct sk_buff *msg;
6323         void *hdr;
6324
6325         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6326         if (!msg)
6327                 return;
6328
6329         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
6330         if (!hdr) {
6331                 nlmsg_free(msg);
6332                 return;
6333         }
6334
6335         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6336         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6337         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
6338         if (ie_len && ie)
6339                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
6340
6341         if (genlmsg_end(msg, hdr) < 0) {
6342                 nlmsg_free(msg);
6343                 return;
6344         }
6345
6346         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6347                                 nl80211_mlme_mcgrp.id, gfp);
6348         return;
6349
6350  nla_put_failure:
6351         genlmsg_cancel(msg, hdr);
6352         nlmsg_free(msg);
6353 }
6354
6355 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
6356                                  struct net_device *netdev, const u8 *addr,
6357                                  enum nl80211_key_type key_type, int key_id,
6358                                  const u8 *tsc, gfp_t gfp)
6359 {
6360         struct sk_buff *msg;
6361         void *hdr;
6362
6363         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6364         if (!msg)
6365                 return;
6366
6367         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
6368         if (!hdr) {
6369                 nlmsg_free(msg);
6370                 return;
6371         }
6372
6373         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6374         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6375         if (addr)
6376                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6377         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
6378         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
6379         if (tsc)
6380                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
6381
6382         if (genlmsg_end(msg, hdr) < 0) {
6383                 nlmsg_free(msg);
6384                 return;
6385         }
6386
6387         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6388                                 nl80211_mlme_mcgrp.id, gfp);
6389         return;
6390
6391  nla_put_failure:
6392         genlmsg_cancel(msg, hdr);
6393         nlmsg_free(msg);
6394 }
6395
6396 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
6397                                     struct ieee80211_channel *channel_before,
6398                                     struct ieee80211_channel *channel_after)
6399 {
6400         struct sk_buff *msg;
6401         void *hdr;
6402         struct nlattr *nl_freq;
6403
6404         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
6405         if (!msg)
6406                 return;
6407
6408         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
6409         if (!hdr) {
6410                 nlmsg_free(msg);
6411                 return;
6412         }
6413
6414         /*
6415          * Since we are applying the beacon hint to a wiphy we know its
6416          * wiphy_idx is valid
6417          */
6418         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
6419
6420         /* Before */
6421         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
6422         if (!nl_freq)
6423                 goto nla_put_failure;
6424         if (nl80211_msg_put_channel(msg, channel_before))
6425                 goto nla_put_failure;
6426         nla_nest_end(msg, nl_freq);
6427
6428         /* After */
6429         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
6430         if (!nl_freq)
6431                 goto nla_put_failure;
6432         if (nl80211_msg_put_channel(msg, channel_after))
6433                 goto nla_put_failure;
6434         nla_nest_end(msg, nl_freq);
6435
6436         if (genlmsg_end(msg, hdr) < 0) {
6437                 nlmsg_free(msg);
6438                 return;
6439         }
6440
6441         rcu_read_lock();
6442         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6443                                 GFP_ATOMIC);
6444         rcu_read_unlock();
6445
6446         return;
6447
6448 nla_put_failure:
6449         genlmsg_cancel(msg, hdr);
6450         nlmsg_free(msg);
6451 }
6452
6453 static void nl80211_send_remain_on_chan_event(
6454         int cmd, struct cfg80211_registered_device *rdev,
6455         struct net_device *netdev, u64 cookie,
6456         struct ieee80211_channel *chan,
6457         enum nl80211_channel_type channel_type,
6458         unsigned int duration, gfp_t gfp)
6459 {
6460         struct sk_buff *msg;
6461         void *hdr;
6462
6463         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6464         if (!msg)
6465                 return;
6466
6467         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6468         if (!hdr) {
6469                 nlmsg_free(msg);
6470                 return;
6471         }
6472
6473         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6474         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6475         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
6476         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
6477         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6478
6479         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
6480                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
6481
6482         if (genlmsg_end(msg, hdr) < 0) {
6483                 nlmsg_free(msg);
6484                 return;
6485         }
6486
6487         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6488                                 nl80211_mlme_mcgrp.id, gfp);
6489         return;
6490
6491  nla_put_failure:
6492         genlmsg_cancel(msg, hdr);
6493         nlmsg_free(msg);
6494 }
6495
6496 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
6497                                     struct net_device *netdev, u64 cookie,
6498                                     struct ieee80211_channel *chan,
6499                                     enum nl80211_channel_type channel_type,
6500                                     unsigned int duration, gfp_t gfp)
6501 {
6502         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
6503                                           rdev, netdev, cookie, chan,
6504                                           channel_type, duration, gfp);
6505 }
6506
6507 void nl80211_send_remain_on_channel_cancel(
6508         struct cfg80211_registered_device *rdev, struct net_device *netdev,
6509         u64 cookie, struct ieee80211_channel *chan,
6510         enum nl80211_channel_type channel_type, gfp_t gfp)
6511 {
6512         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6513                                           rdev, netdev, cookie, chan,
6514                                           channel_type, 0, gfp);
6515 }
6516
6517 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
6518                             struct net_device *dev, const u8 *mac_addr,
6519                             struct station_info *sinfo, gfp_t gfp)
6520 {
6521         struct sk_buff *msg;
6522
6523         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6524         if (!msg)
6525                 return;
6526
6527         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6528                 nlmsg_free(msg);
6529                 return;
6530         }
6531
6532         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6533                                 nl80211_mlme_mcgrp.id, gfp);
6534 }
6535
6536 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
6537                                 struct net_device *dev, const u8 *mac_addr,
6538                                 gfp_t gfp)
6539 {
6540         struct sk_buff *msg;
6541         void *hdr;
6542
6543         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6544         if (!msg)
6545                 return;
6546
6547         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
6548         if (!hdr) {
6549                 nlmsg_free(msg);
6550                 return;
6551         }
6552
6553         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
6554         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
6555
6556         if (genlmsg_end(msg, hdr) < 0) {
6557                 nlmsg_free(msg);
6558                 return;
6559         }
6560
6561         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6562                                 nl80211_mlme_mcgrp.id, gfp);
6563         return;
6564
6565  nla_put_failure:
6566         genlmsg_cancel(msg, hdr);
6567         nlmsg_free(msg);
6568 }
6569
6570 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
6571                       struct net_device *netdev, u32 nlpid,
6572                       int freq, const u8 *buf, size_t len, gfp_t gfp)
6573 {
6574         struct sk_buff *msg;
6575         void *hdr;
6576         int err;
6577
6578         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6579         if (!msg)
6580                 return -ENOMEM;
6581
6582         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
6583         if (!hdr) {
6584                 nlmsg_free(msg);
6585                 return -ENOMEM;
6586         }
6587
6588         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6589         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6590         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6591         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6592
6593         err = genlmsg_end(msg, hdr);
6594         if (err < 0) {
6595                 nlmsg_free(msg);
6596                 return err;
6597         }
6598
6599         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6600         if (err < 0)
6601                 return err;
6602         return 0;
6603
6604  nla_put_failure:
6605         genlmsg_cancel(msg, hdr);
6606         nlmsg_free(msg);
6607         return -ENOBUFS;
6608 }
6609
6610 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
6611                                  struct net_device *netdev, u64 cookie,
6612                                  const u8 *buf, size_t len, bool ack,
6613                                  gfp_t gfp)
6614 {
6615         struct sk_buff *msg;
6616         void *hdr;
6617
6618         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6619         if (!msg)
6620                 return;
6621
6622         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6623         if (!hdr) {
6624                 nlmsg_free(msg);
6625                 return;
6626         }
6627
6628         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6629         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6630         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6631         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6632         if (ack)
6633                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6634
6635         if (genlmsg_end(msg, hdr) < 0) {
6636                 nlmsg_free(msg);
6637                 return;
6638         }
6639
6640         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6641         return;
6642
6643  nla_put_failure:
6644         genlmsg_cancel(msg, hdr);
6645         nlmsg_free(msg);
6646 }
6647
6648 void
6649 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6650                              struct net_device *netdev,
6651                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6652                              gfp_t gfp)
6653 {
6654         struct sk_buff *msg;
6655         struct nlattr *pinfoattr;
6656         void *hdr;
6657
6658         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6659         if (!msg)
6660                 return;
6661
6662         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6663         if (!hdr) {
6664                 nlmsg_free(msg);
6665                 return;
6666         }
6667
6668         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6669         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6670
6671         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6672         if (!pinfoattr)
6673                 goto nla_put_failure;
6674
6675         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6676                     rssi_event);
6677
6678         nla_nest_end(msg, pinfoattr);
6679
6680         if (genlmsg_end(msg, hdr) < 0) {
6681                 nlmsg_free(msg);
6682                 return;
6683         }
6684
6685         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6686                                 nl80211_mlme_mcgrp.id, gfp);
6687         return;
6688
6689  nla_put_failure:
6690         genlmsg_cancel(msg, hdr);
6691         nlmsg_free(msg);
6692 }
6693
6694 void
6695 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
6696                                 struct net_device *netdev, const u8 *peer,
6697                                 u32 num_packets, gfp_t gfp)
6698 {
6699         struct sk_buff *msg;
6700         struct nlattr *pinfoattr;
6701         void *hdr;
6702
6703         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6704         if (!msg)
6705                 return;
6706
6707         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6708         if (!hdr) {
6709                 nlmsg_free(msg);
6710                 return;
6711         }
6712
6713         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6715         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6716
6717         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6718         if (!pinfoattr)
6719                 goto nla_put_failure;
6720
6721         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6722
6723         nla_nest_end(msg, pinfoattr);
6724
6725         if (genlmsg_end(msg, hdr) < 0) {
6726                 nlmsg_free(msg);
6727                 return;
6728         }
6729
6730         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6731                                 nl80211_mlme_mcgrp.id, gfp);
6732         return;
6733
6734  nla_put_failure:
6735         genlmsg_cancel(msg, hdr);
6736         nlmsg_free(msg);
6737 }
6738
6739 static int nl80211_netlink_notify(struct notifier_block * nb,
6740                                   unsigned long state,
6741                                   void *_notify)
6742 {
6743         struct netlink_notify *notify = _notify;
6744         struct cfg80211_registered_device *rdev;
6745         struct wireless_dev *wdev;
6746
6747         if (state != NETLINK_URELEASE)
6748                 return NOTIFY_DONE;
6749
6750         rcu_read_lock();
6751
6752         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6753                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6754                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6755
6756         rcu_read_unlock();
6757
6758         return NOTIFY_DONE;
6759 }
6760
6761 static struct notifier_block nl80211_netlink_notifier = {
6762         .notifier_call = nl80211_netlink_notify,
6763 };
6764
6765 /* initialisation/exit functions */
6766
6767 int nl80211_init(void)
6768 {
6769         int err;
6770
6771         err = genl_register_family_with_ops(&nl80211_fam,
6772                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6773         if (err)
6774                 return err;
6775
6776         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6777         if (err)
6778                 goto err_out;
6779
6780         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6781         if (err)
6782                 goto err_out;
6783
6784         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6785         if (err)
6786                 goto err_out;
6787
6788         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6789         if (err)
6790                 goto err_out;
6791
6792 #ifdef CONFIG_NL80211_TESTMODE
6793         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6794         if (err)
6795                 goto err_out;
6796 #endif
6797
6798         err = netlink_register_notifier(&nl80211_netlink_notifier);
6799         if (err)
6800                 goto err_out;
6801
6802         return 0;
6803  err_out:
6804         genl_unregister_family(&nl80211_fam);
6805         return err;
6806 }
6807
6808 void nl80211_exit(void)
6809 {
6810         netlink_unregister_notifier(&nl80211_netlink_notifier);
6811         genl_unregister_family(&nl80211_fam);
6812 }