net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  27                             struct genl_info *info);
  28 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  29                               struct genl_info *info);
  30
  31 /* the netlink family */
  32 static struct genl_family nl80211_fam = {
  33         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  34         .name = "nl80211",      /* have users key off the name instead */
  35         .hdrsize = 0,           /* no private header */
  36         .version = 1,           /* no particular meaning now */
  37         .maxattr = NL80211_ATTR_MAX,
  38         .netnsok = true,
  39         .pre_doit = nl80211_pre_doit,
  40         .post_doit = nl80211_post_doit,
  41 };
  42
  43 /* internal helper: get rdev and dev */
  44 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  45                                        struct cfg80211_registered_device **rdev,
  46                                        struct net_device **dev)
  47 {
  48         struct nlattr **attrs = info->attrs;
  49         int ifindex;
  50
  51         if (!attrs[NL80211_ATTR_IFINDEX])
  52                 return -EINVAL;
  53
  54         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  55         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  56         if (!*dev)
  57                 return -ENODEV;
  58
  59         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  60         if (IS_ERR(*rdev)) {
  61                 dev_put(*dev);
  62                 return PTR_ERR(*rdev);
  63         }
  64
  65         return 0;
  66 }
  67
  68 /* policy for the attributes */
  69 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  70         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  72                                       .len = 20-1 },
  73         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  74         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  75         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  77         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  78         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  79         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  81
  82         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  83         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  84         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  85
  86         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  87         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  88
  89         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  90         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  91                                     .len = WLAN_MAX_KEY_LEN },
  92         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  93         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  94         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  95         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  96         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
  97
  98         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  99         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 100         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 101                                        .len = IEEE80211_MAX_DATA_LEN },
 102         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 103                                        .len = IEEE80211_MAX_DATA_LEN },
 104         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 105         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 106         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 107         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 108                                                .len = NL80211_MAX_SUPP_RATES },
 109         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 110         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 111         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 112         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 113                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 114         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 115
 116         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 117         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 120         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 121         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 122         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 123                                            .len = NL80211_MAX_SUPP_RATES },
 124         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 125
 126         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 127         [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         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 179 };
 180
 181 /* policy for the key attributes */
 182 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 183         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 184         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 185         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 186         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 187         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 188         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 189         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 190         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 191 };
 192
 193 /* policy for the key default flags */
 194 static const struct nla_policy
 195 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 196         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 197         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 198 };
 199
 200 /* policy for WoWLAN attributes */
 201 static const struct nla_policy
 202 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 203         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 204         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 205         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 206         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 207 };
 208
 209 /* ifidx get helper */
 210 static int nl80211_get_ifidx(struct netlink_callback *cb)
 211 {
 212         int res;
 213
 214         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 215                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 216                           nl80211_policy);
 217         if (res)
 218                 return res;
 219
 220         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 221                 return -EINVAL;
 222
 223         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 224         if (!res)
 225                 return -EINVAL;
 226         return res;
 227 }
 228
 229 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 230                                        struct netlink_callback *cb,
 231                                        struct cfg80211_registered_device **rdev,
 232                                        struct net_device **dev)
 233 {
 234         int ifidx = cb->args[0];
 235         int err;
 236
 237         if (!ifidx)
 238                 ifidx = nl80211_get_ifidx(cb);
 239         if (ifidx < 0)
 240                 return ifidx;
 241
 242         cb->args[0] = ifidx;
 243
 244         rtnl_lock();
 245
 246         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 247         if (!*dev) {
 248                 err = -ENODEV;
 249                 goto out_rtnl;
 250         }
 251
 252         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 253         if (IS_ERR(*rdev)) {
 254                 err = PTR_ERR(*rdev);
 255                 goto out_rtnl;
 256         }
 257
 258         return 0;
 259  out_rtnl:
 260         rtnl_unlock();
 261         return err;
 262 }
 263
 264 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 265 {
 266         cfg80211_unlock_rdev(rdev);
 267         rtnl_unlock();
 268 }
 269
 270 /* IE validation */
 271 static bool is_valid_ie_attr(const struct nlattr *attr)
 272 {
 273         const u8 *pos;
 274         int len;
 275
 276         if (!attr)
 277                 return true;
 278
 279         pos = nla_data(attr);
 280         len = nla_len(attr);
 281
 282         while (len) {
 283                 u8 elemlen;
 284
 285                 if (len < 2)
 286                         return false;
 287                 len -= 2;
 288
 289                 elemlen = pos[1];
 290                 if (elemlen > len)
 291                         return false;
 292
 293                 len -= elemlen;
 294                 pos += 2 + elemlen;
 295         }
 296
 297         return true;
 298 }
 299
 300 /* message building helper */
 301 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 302                                    int flags, u8 cmd)
 303 {
 304         /* since there is no private header just add the generic one */
 305         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 306 }
 307
 308 static int nl80211_msg_put_channel(struct sk_buff *msg,
 309                                    struct ieee80211_channel *chan)
 310 {
 311         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 312                     chan->center_freq);
 313
 314         if (chan->flags & IEEE80211_CHAN_DISABLED)
 315                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 316         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 317                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 318         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 319                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 320         if (chan->flags & IEEE80211_CHAN_RADAR)
 321                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 322
 323         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 324                     DBM_TO_MBM(chan->max_power));
 325
 326         return 0;
 327
 328  nla_put_failure:
 329         return -ENOBUFS;
 330 }
 331
 332 /* netlink command implementations */
 333
 334 struct key_parse {
 335         struct key_params p;
 336         int idx;
 337         int type;
 338         bool def, defmgmt;
 339         bool def_uni, def_multi;
 340 };
 341
 342 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 343 {
 344         struct nlattr *tb[NL80211_KEY_MAX + 1];
 345         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 346                                    nl80211_key_policy);
 347         if (err)
 348                 return err;
 349
 350         k->def = !!tb[NL80211_KEY_DEFAULT];
 351         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 352
 353         if (k->def) {
 354                 k->def_uni = true;
 355                 k->def_multi = true;
 356         }
 357         if (k->defmgmt)
 358                 k->def_multi = true;
 359
 360         if (tb[NL80211_KEY_IDX])
 361                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 362
 363         if (tb[NL80211_KEY_DATA]) {
 364                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 365                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 366         }
 367
 368         if (tb[NL80211_KEY_SEQ]) {
 369                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 370                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 371         }
 372
 373         if (tb[NL80211_KEY_CIPHER])
 374                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 375
 376         if (tb[NL80211_KEY_TYPE]) {
 377                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 378                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 379                         return -EINVAL;
 380         }
 381
 382         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 383                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 384                 int err = nla_parse_nested(kdt,
 385                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 386                                            tb[NL80211_KEY_DEFAULT_TYPES],
 387                                            nl80211_key_default_policy);
 388                 if (err)
 389                         return err;
 390
 391                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 392                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 399 {
 400         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 401                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 402                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 403         }
 404
 405         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 406                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 407                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 408         }
 409
 410         if (info->attrs[NL80211_ATTR_KEY_IDX])
 411                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 412
 413         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 414                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 415
 416         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 417         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 418
 419         if (k->def) {
 420                 k->def_uni = true;
 421                 k->def_multi = true;
 422         }
 423         if (k->defmgmt)
 424                 k->def_multi = true;
 425
 426         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 427                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 428                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 429                         return -EINVAL;
 430         }
 431
 432         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 433                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 434                 int err = nla_parse_nested(
 435                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 436                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 437                                 nl80211_key_default_policy);
 438                 if (err)
 439                         return err;
 440
 441                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 442                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 443         }
 444
 445         return 0;
 446 }
 447
 448 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 449 {
 450         int err;
 451
 452         memset(k, 0, sizeof(*k));
 453         k->idx = -1;
 454         k->type = -1;
 455
 456         if (info->attrs[NL80211_ATTR_KEY])
 457                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 458         else
 459                 err = nl80211_parse_key_old(info, k);
 460
 461         if (err)
 462                 return err;
 463
 464         if (k->def && k->defmgmt)
 465                 return -EINVAL;
 466
 467         if (k->defmgmt) {
 468                 if (k->def_uni || !k->def_multi)
 469                         return -EINVAL;
 470         }
 471
 472         if (k->idx != -1) {
 473                 if (k->defmgmt) {
 474                         if (k->idx < 4 || k->idx > 5)
 475                                 return -EINVAL;
 476                 } else if (k->def) {
 477                         if (k->idx < 0 || k->idx > 3)
 478                                 return -EINVAL;
 479                 } else {
 480                         if (k->idx < 0 || k->idx > 5)
 481                                 return -EINVAL;
 482                 }
 483         }
 484
 485         return 0;
 486 }
 487
 488 static struct cfg80211_cached_keys *
 489 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 490                        struct nlattr *keys)
 491 {
 492         struct key_parse parse;
 493         struct nlattr *key;
 494         struct cfg80211_cached_keys *result;
 495         int rem, err, def = 0;
 496
 497         result = kzalloc(sizeof(*result), GFP_KERNEL);
 498         if (!result)
 499                 return ERR_PTR(-ENOMEM);
 500
 501         result->def = -1;
 502         result->defmgmt = -1;
 503
 504         nla_for_each_nested(key, keys, rem) {
 505                 memset(&parse, 0, sizeof(parse));
 506                 parse.idx = -1;
 507
 508                 err = nl80211_parse_key_new(key, &parse);
 509                 if (err)
 510                         goto error;
 511                 err = -EINVAL;
 512                 if (!parse.p.key)
 513                         goto error;
 514                 if (parse.idx < 0 || parse.idx > 4)
 515                         goto error;
 516                 if (parse.def) {
 517                         if (def)
 518                                 goto error;
 519                         def = 1;
 520                         result->def = parse.idx;
 521                         if (!parse.def_uni || !parse.def_multi)
 522                                 goto error;
 523                 } else if (parse.defmgmt)
 524                         goto error;
 525                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 526                                                      parse.idx, false, NULL);
 527                 if (err)
 528                         goto error;
 529                 result->params[parse.idx].cipher = parse.p.cipher;
 530                 result->params[parse.idx].key_len = parse.p.key_len;
 531                 result->params[parse.idx].key = result->data[parse.idx];
 532                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 533         }
 534
 535         return result;
 536  error:
 537         kfree(result);
 538         return ERR_PTR(err);
 539 }
 540
 541 static int nl80211_key_allowed(struct wireless_dev *wdev)
 542 {
 543         ASSERT_WDEV_LOCK(wdev);
 544
 545         switch (wdev->iftype) {
 546         case NL80211_IFTYPE_AP:
 547         case NL80211_IFTYPE_AP_VLAN:
 548         case NL80211_IFTYPE_P2P_GO:
 549         case NL80211_IFTYPE_MESH_POINT:
 550                 break;
 551         case NL80211_IFTYPE_ADHOC:
 552                 if (!wdev->current_bss)
 553                         return -ENOLINK;
 554                 break;
 555         case NL80211_IFTYPE_STATION:
 556         case NL80211_IFTYPE_P2P_CLIENT:
 557                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 558                         return -ENOLINK;
 559                 break;
 560         default:
 561                 return -EINVAL;
 562         }
 563
 564         return 0;
 565 }
 566
 567 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 568 {
 569         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 570         int i;
 571
 572         if (!nl_modes)
 573                 goto nla_put_failure;
 574
 575         i = 0;
 576         while (ifmodes) {
 577                 if (ifmodes & 1)
 578                         NLA_PUT_FLAG(msg, i);
 579                 ifmodes >>= 1;
 580                 i++;
 581         }
 582
 583         nla_nest_end(msg, nl_modes);
 584         return 0;
 585
 586 nla_put_failure:
 587         return -ENOBUFS;
 588 }
 589
 590 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 591                                           struct sk_buff *msg)
 592 {
 593         struct nlattr *nl_combis;
 594         int i, j;
 595
 596         nl_combis = nla_nest_start(msg,
 597                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 598         if (!nl_combis)
 599                 goto nla_put_failure;
 600
 601         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 602                 const struct ieee80211_iface_combination *c;
 603                 struct nlattr *nl_combi, *nl_limits;
 604
 605                 c = &wiphy->iface_combinations[i];
 606
 607                 nl_combi = nla_nest_start(msg, i + 1);
 608                 if (!nl_combi)
 609                         goto nla_put_failure;
 610
 611                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 612                 if (!nl_limits)
 613                         goto nla_put_failure;
 614
 615                 for (j = 0; j < c->n_limits; j++) {
 616                         struct nlattr *nl_limit;
 617
 618                         nl_limit = nla_nest_start(msg, j + 1);
 619                         if (!nl_limit)
 620                                 goto nla_put_failure;
 621                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 622                                     c->limits[j].max);
 623                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 624                                                 c->limits[j].types))
 625                                 goto nla_put_failure;
 626                         nla_nest_end(msg, nl_limit);
 627                 }
 628
 629                 nla_nest_end(msg, nl_limits);
 630
 631                 if (c->beacon_int_infra_match)
 632                         NLA_PUT_FLAG(msg,
 633                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 634                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 635                             c->num_different_channels);
 636                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 637                             c->max_interfaces);
 638
 639                 nla_nest_end(msg, nl_combi);
 640         }
 641
 642         nla_nest_end(msg, nl_combis);
 643
 644         return 0;
 645 nla_put_failure:
 646         return -ENOBUFS;
 647 }
 648
 649 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 650                               struct cfg80211_registered_device *dev)
 651 {
 652         void *hdr;
 653         struct nlattr *nl_bands, *nl_band;
 654         struct nlattr *nl_freqs, *nl_freq;
 655         struct nlattr *nl_rates, *nl_rate;
 656         struct nlattr *nl_cmds;
 657         enum ieee80211_band band;
 658         struct ieee80211_channel *chan;
 659         struct ieee80211_rate *rate;
 660         int i;
 661         const struct ieee80211_txrx_stypes *mgmt_stypes =
 662                                 dev->wiphy.mgmt_stypes;
 663
 664         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 665         if (!hdr)
 666                 return -1;
 667
 668         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 669         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 670
 671         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 672                     cfg80211_rdev_list_generation);
 673
 674         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 675                    dev->wiphy.retry_short);
 676         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 677                    dev->wiphy.retry_long);
 678         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 679                     dev->wiphy.frag_threshold);
 680         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 681                     dev->wiphy.rts_threshold);
 682         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 683                     dev->wiphy.coverage_class);
 684         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 685                    dev->wiphy.max_scan_ssids);
 686         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 687                     dev->wiphy.max_scan_ie_len);
 688
 689         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 690                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 691         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 692                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 693
 694         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 695                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 696                 dev->wiphy.cipher_suites);
 697
 698         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 699                    dev->wiphy.max_num_pmkids);
 700
 701         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 702                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 703
 704         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 705                     dev->wiphy.available_antennas_tx);
 706         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 707                     dev->wiphy.available_antennas_rx);
 708
 709         if ((dev->wiphy.available_antennas_tx ||
 710              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 711                 u32 tx_ant = 0, rx_ant = 0;
 712                 int res;
 713                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 714                 if (!res) {
 715                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 716                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 717                 }
 718         }
 719
 720         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 721                                 dev->wiphy.interface_modes))
 722                 goto nla_put_failure;
 723
 724         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 725         if (!nl_bands)
 726                 goto nla_put_failure;
 727
 728         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 729                 if (!dev->wiphy.bands[band])
 730                         continue;
 731
 732                 nl_band = nla_nest_start(msg, band);
 733                 if (!nl_band)
 734                         goto nla_put_failure;
 735
 736                 /* add HT info */
 737                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 738                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 739                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 740                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 741                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 742                                 dev->wiphy.bands[band]->ht_cap.cap);
 743                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 744                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 745                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 746                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 747                 }
 748
 749                 /* add frequencies */
 750                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 751                 if (!nl_freqs)
 752                         goto nla_put_failure;
 753
 754                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 755                         nl_freq = nla_nest_start(msg, i);
 756                         if (!nl_freq)
 757                                 goto nla_put_failure;
 758
 759                         chan = &dev->wiphy.bands[band]->channels[i];
 760
 761                         if (nl80211_msg_put_channel(msg, chan))
 762                                 goto nla_put_failure;
 763
 764                         nla_nest_end(msg, nl_freq);
 765                 }
 766
 767                 nla_nest_end(msg, nl_freqs);
 768
 769                 /* add bitrates */
 770                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 771                 if (!nl_rates)
 772                         goto nla_put_failure;
 773
 774                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 775                         nl_rate = nla_nest_start(msg, i);
 776                         if (!nl_rate)
 777                                 goto nla_put_failure;
 778
 779                         rate = &dev->wiphy.bands[band]->bitrates[i];
 780                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 781                                     rate->bitrate);
 782                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 783                                 NLA_PUT_FLAG(msg,
 784                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 785
 786                         nla_nest_end(msg, nl_rate);
 787                 }
 788
 789                 nla_nest_end(msg, nl_rates);
 790
 791                 nla_nest_end(msg, nl_band);
 792         }
 793         nla_nest_end(msg, nl_bands);
 794
 795         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 796         if (!nl_cmds)
 797                 goto nla_put_failure;
 798
 799         i = 0;
 800 #define CMD(op, n)                                              \
 801          do {                                                   \
 802                 if (dev->ops->op) {                             \
 803                         i++;                                    \
 804                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 805                 }                                               \
 806         } while (0)
 807
 808         CMD(add_virtual_intf, NEW_INTERFACE);
 809         CMD(change_virtual_intf, SET_INTERFACE);
 810         CMD(add_key, NEW_KEY);
 811         CMD(add_beacon, NEW_BEACON);
 812         CMD(add_station, NEW_STATION);
 813         CMD(add_mpath, NEW_MPATH);
 814         CMD(update_mesh_config, SET_MESH_CONFIG);
 815         CMD(change_bss, SET_BSS);
 816         CMD(auth, AUTHENTICATE);
 817         CMD(assoc, ASSOCIATE);
 818         CMD(deauth, DEAUTHENTICATE);
 819         CMD(disassoc, DISASSOCIATE);
 820         CMD(join_ibss, JOIN_IBSS);
 821         CMD(join_mesh, JOIN_MESH);
 822         CMD(set_pmksa, SET_PMKSA);
 823         CMD(del_pmksa, DEL_PMKSA);
 824         CMD(flush_pmksa, FLUSH_PMKSA);
 825         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 826         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 827         CMD(mgmt_tx, FRAME);
 828         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 829         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 830                 i++;
 831                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 832         }
 833         CMD(set_channel, SET_CHANNEL);
 834         CMD(set_wds_peer, SET_WDS_PEER);
 835         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 836                 CMD(sched_scan_start, START_SCHED_SCAN);
 837
 838 #undef CMD
 839
 840         if (dev->ops->connect || dev->ops->auth) {
 841                 i++;
 842                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 843         }
 844
 845         if (dev->ops->disconnect || dev->ops->deauth) {
 846                 i++;
 847                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 848         }
 849
 850         nla_nest_end(msg, nl_cmds);
 851
 852         if (dev->ops->remain_on_channel)
 853                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 854                             dev->wiphy.max_remain_on_channel_duration);
 855
 856         /* for now at least assume all drivers have it */
 857         if (dev->ops->mgmt_tx)
 858                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 859
 860         if (mgmt_stypes) {
 861                 u16 stypes;
 862                 struct nlattr *nl_ftypes, *nl_ifs;
 863                 enum nl80211_iftype ift;
 864
 865                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 866                 if (!nl_ifs)
 867                         goto nla_put_failure;
 868
 869                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 870                         nl_ftypes = nla_nest_start(msg, ift);
 871                         if (!nl_ftypes)
 872                                 goto nla_put_failure;
 873                         i = 0;
 874                         stypes = mgmt_stypes[ift].tx;
 875                         while (stypes) {
 876                                 if (stypes & 1)
 877                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 878                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 879                                 stypes >>= 1;
 880                                 i++;
 881                         }
 882                         nla_nest_end(msg, nl_ftypes);
 883                 }
 884
 885                 nla_nest_end(msg, nl_ifs);
 886
 887                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 888                 if (!nl_ifs)
 889                         goto nla_put_failure;
 890
 891                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 892                         nl_ftypes = nla_nest_start(msg, ift);
 893                         if (!nl_ftypes)
 894                                 goto nla_put_failure;
 895                         i = 0;
 896                         stypes = mgmt_stypes[ift].rx;
 897                         while (stypes) {
 898                                 if (stypes & 1)
 899                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 900                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 901                                 stypes >>= 1;
 902                                 i++;
 903                         }
 904                         nla_nest_end(msg, nl_ftypes);
 905                 }
 906                 nla_nest_end(msg, nl_ifs);
 907         }
 908
 909         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 910                 struct nlattr *nl_wowlan;
 911
 912                 nl_wowlan = nla_nest_start(msg,
 913                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 914                 if (!nl_wowlan)
 915                         goto nla_put_failure;
 916
 917                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 918                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 919                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
 920                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 921                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
 922                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
 923                 if (dev->wiphy.wowlan.n_patterns) {
 924                         struct nl80211_wowlan_pattern_support pat = {
 925                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
 926                                 .min_pattern_len =
 927                                         dev->wiphy.wowlan.pattern_min_len,
 928                                 .max_pattern_len =
 929                                         dev->wiphy.wowlan.pattern_max_len,
 930                         };
 931                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 932                                 sizeof(pat), &pat);
 933                 }
 934
 935                 nla_nest_end(msg, nl_wowlan);
 936         }
 937
 938         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
 939                                 dev->wiphy.software_iftypes))
 940                 goto nla_put_failure;
 941
 942         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
 943                 goto nla_put_failure;
 944
 945         return genlmsg_end(msg, hdr);
 946
 947  nla_put_failure:
 948         genlmsg_cancel(msg, hdr);
 949         return -EMSGSIZE;
 950 }
 951
 952 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 953 {
 954         int idx = 0;
 955         int start = cb->args[0];
 956         struct cfg80211_registered_device *dev;
 957
 958         mutex_lock(&cfg80211_mutex);
 959         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 960                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 961                         continue;
 962                 if (++idx <= start)
 963                         continue;
 964                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 965                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 966                                        dev) < 0) {
 967                         idx--;
 968                         break;
 969                 }
 970         }
 971         mutex_unlock(&cfg80211_mutex);
 972
 973         cb->args[0] = idx;
 974
 975         return skb->len;
 976 }
 977
 978 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 979 {
 980         struct sk_buff *msg;
 981         struct cfg80211_registered_device *dev = info->user_ptr[0];
 982
 983         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 984         if (!msg)
 985                 return -ENOMEM;
 986
 987         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 988                 nlmsg_free(msg);
 989                 return -ENOBUFS;
 990         }
 991
 992         return genlmsg_reply(msg, info);
 993 }
 994
 995 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 996         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 997         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 998         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 999         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1000         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1001 };
1002
1003 static int parse_txq_params(struct nlattr *tb[],
1004                             struct ieee80211_txq_params *txq_params)
1005 {
1006         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1007             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1008             !tb[NL80211_TXQ_ATTR_AIFS])
1009                 return -EINVAL;
1010
1011         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1012         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1013         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1014         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1015         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1016
1017         return 0;
1018 }
1019
1020 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1021 {
1022         /*
1023          * You can only set the channel explicitly for AP, mesh
1024          * and WDS type interfaces; all others have their channel
1025          * managed via their respective "establish a connection"
1026          * command (connect, join, ...)
1027          *
1028          * Monitors are special as they are normally slaved to
1029          * whatever else is going on, so they behave as though
1030          * you tried setting the wiphy channel itself.
1031          */
1032         return !wdev ||
1033                 wdev->iftype == NL80211_IFTYPE_AP ||
1034                 wdev->iftype == NL80211_IFTYPE_WDS ||
1035                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1036                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1037                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1038 }
1039
1040 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1041                                  struct wireless_dev *wdev,
1042                                  struct genl_info *info)
1043 {
1044         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1045         u32 freq;
1046         int result;
1047
1048         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1049                 return -EINVAL;
1050
1051         if (!nl80211_can_set_dev_channel(wdev))
1052                 return -EOPNOTSUPP;
1053
1054         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1055                 channel_type = nla_get_u32(info->attrs[
1056                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1057                 if (channel_type != NL80211_CHAN_NO_HT &&
1058                     channel_type != NL80211_CHAN_HT20 &&
1059                     channel_type != NL80211_CHAN_HT40PLUS &&
1060                     channel_type != NL80211_CHAN_HT40MINUS)
1061                         return -EINVAL;
1062         }
1063
1064         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1065
1066         mutex_lock(&rdev->devlist_mtx);
1067         if (wdev) {
1068                 wdev_lock(wdev);
1069                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1070                 wdev_unlock(wdev);
1071         } else {
1072                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1073         }
1074         mutex_unlock(&rdev->devlist_mtx);
1075
1076         return result;
1077 }
1078
1079 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1080 {
1081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1082         struct net_device *netdev = info->user_ptr[1];
1083
1084         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1085 }
1086
1087 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1088 {
1089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1090         struct net_device *dev = info->user_ptr[1];
1091         struct wireless_dev *wdev = dev->ieee80211_ptr;
1092         const u8 *bssid;
1093
1094         if (!info->attrs[NL80211_ATTR_MAC])
1095                 return -EINVAL;
1096
1097         if (netif_running(dev))
1098                 return -EBUSY;
1099
1100         if (!rdev->ops->set_wds_peer)
1101                 return -EOPNOTSUPP;
1102
1103         if (wdev->iftype != NL80211_IFTYPE_WDS)
1104                 return -EOPNOTSUPP;
1105
1106         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1107         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1108 }
1109
1110
1111 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1112 {
1113         struct cfg80211_registered_device *rdev;
1114         struct net_device *netdev = NULL;
1115         struct wireless_dev *wdev;
1116         int result = 0, rem_txq_params = 0;
1117         struct nlattr *nl_txq_params;
1118         u32 changed;
1119         u8 retry_short = 0, retry_long = 0;
1120         u32 frag_threshold = 0, rts_threshold = 0;
1121         u8 coverage_class = 0;
1122
1123         /*
1124          * Try to find the wiphy and netdev. Normally this
1125          * function shouldn't need the netdev, but this is
1126          * done for backward compatibility -- previously
1127          * setting the channel was done per wiphy, but now
1128          * it is per netdev. Previous userland like hostapd
1129          * also passed a netdev to set_wiphy, so that it is
1130          * possible to let that go to the right netdev!
1131          */
1132         mutex_lock(&cfg80211_mutex);
1133
1134         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1135                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1136
1137                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1138                 if (netdev && netdev->ieee80211_ptr) {
1139                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1140                         mutex_lock(&rdev->mtx);
1141                 } else
1142                         netdev = NULL;
1143         }
1144
1145         if (!netdev) {
1146                 rdev = __cfg80211_rdev_from_info(info);
1147                 if (IS_ERR(rdev)) {
1148                         mutex_unlock(&cfg80211_mutex);
1149                         return PTR_ERR(rdev);
1150                 }
1151                 wdev = NULL;
1152                 netdev = NULL;
1153                 result = 0;
1154
1155                 mutex_lock(&rdev->mtx);
1156         } else if (netif_running(netdev) &&
1157                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1158                 wdev = netdev->ieee80211_ptr;
1159         else
1160                 wdev = NULL;
1161
1162         /*
1163          * end workaround code, by now the rdev is available
1164          * and locked, and wdev may or may not be NULL.
1165          */
1166
1167         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1168                 result = cfg80211_dev_rename(
1169                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1170
1171         mutex_unlock(&cfg80211_mutex);
1172
1173         if (result)
1174                 goto bad_res;
1175
1176         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1177                 struct ieee80211_txq_params txq_params;
1178                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1179
1180                 if (!rdev->ops->set_txq_params) {
1181                         result = -EOPNOTSUPP;
1182                         goto bad_res;
1183                 }
1184
1185                 nla_for_each_nested(nl_txq_params,
1186                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1187                                     rem_txq_params) {
1188                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1189                                   nla_data(nl_txq_params),
1190                                   nla_len(nl_txq_params),
1191                                   txq_params_policy);
1192                         result = parse_txq_params(tb, &txq_params);
1193                         if (result)
1194                                 goto bad_res;
1195
1196                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1197                                                            &txq_params);
1198                         if (result)
1199                                 goto bad_res;
1200                 }
1201         }
1202
1203         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1204                 result = __nl80211_set_channel(rdev, wdev, info);
1205                 if (result)
1206                         goto bad_res;
1207         }
1208
1209         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1210                 enum nl80211_tx_power_setting type;
1211                 int idx, mbm = 0;
1212
1213                 if (!rdev->ops->set_tx_power) {
1214                         result = -EOPNOTSUPP;
1215                         goto bad_res;
1216                 }
1217
1218                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1219                 type = nla_get_u32(info->attrs[idx]);
1220
1221                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1222                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1223                         result = -EINVAL;
1224                         goto bad_res;
1225                 }
1226
1227                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1228                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1229                         mbm = nla_get_u32(info->attrs[idx]);
1230                 }
1231
1232                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1233                 if (result)
1234                         goto bad_res;
1235         }
1236
1237         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1238             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1239                 u32 tx_ant, rx_ant;
1240                 if ((!rdev->wiphy.available_antennas_tx &&
1241                      !rdev->wiphy.available_antennas_rx) ||
1242                     !rdev->ops->set_antenna) {
1243                         result = -EOPNOTSUPP;
1244                         goto bad_res;
1245                 }
1246
1247                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1248                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1249
1250                 /* reject antenna configurations which don't match the
1251                  * available antenna masks, except for the "all" mask */
1252                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1253                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1254                         result = -EINVAL;
1255                         goto bad_res;
1256                 }
1257
1258                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1259                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1260
1261                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1262                 if (result)
1263                         goto bad_res;
1264         }
1265
1266         changed = 0;
1267
1268         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1269                 retry_short = nla_get_u8(
1270                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1271                 if (retry_short == 0) {
1272                         result = -EINVAL;
1273                         goto bad_res;
1274                 }
1275                 changed |= WIPHY_PARAM_RETRY_SHORT;
1276         }
1277
1278         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1279                 retry_long = nla_get_u8(
1280                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1281                 if (retry_long == 0) {
1282                         result = -EINVAL;
1283                         goto bad_res;
1284                 }
1285                 changed |= WIPHY_PARAM_RETRY_LONG;
1286         }
1287
1288         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1289                 frag_threshold = nla_get_u32(
1290                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1291                 if (frag_threshold < 256) {
1292                         result = -EINVAL;
1293                         goto bad_res;
1294                 }
1295                 if (frag_threshold != (u32) -1) {
1296                         /*
1297                          * Fragments (apart from the last one) are required to
1298                          * have even length. Make the fragmentation code
1299                          * simpler by stripping LSB should someone try to use
1300                          * odd threshold value.
1301                          */
1302                         frag_threshold &= ~0x1;
1303                 }
1304                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1305         }
1306
1307         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1308                 rts_threshold = nla_get_u32(
1309                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1310                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1311         }
1312
1313         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1314                 coverage_class = nla_get_u8(
1315                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1316                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1317         }
1318
1319         if (changed) {
1320                 u8 old_retry_short, old_retry_long;
1321                 u32 old_frag_threshold, old_rts_threshold;
1322                 u8 old_coverage_class;
1323
1324                 if (!rdev->ops->set_wiphy_params) {
1325                         result = -EOPNOTSUPP;
1326                         goto bad_res;
1327                 }
1328
1329                 old_retry_short = rdev->wiphy.retry_short;
1330                 old_retry_long = rdev->wiphy.retry_long;
1331                 old_frag_threshold = rdev->wiphy.frag_threshold;
1332                 old_rts_threshold = rdev->wiphy.rts_threshold;
1333                 old_coverage_class = rdev->wiphy.coverage_class;
1334
1335                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1336                         rdev->wiphy.retry_short = retry_short;
1337                 if (changed & WIPHY_PARAM_RETRY_LONG)
1338                         rdev->wiphy.retry_long = retry_long;
1339                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1340                         rdev->wiphy.frag_threshold = frag_threshold;
1341                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1342                         rdev->wiphy.rts_threshold = rts_threshold;
1343                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1344                         rdev->wiphy.coverage_class = coverage_class;
1345
1346                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1347                 if (result) {
1348                         rdev->wiphy.retry_short = old_retry_short;
1349                         rdev->wiphy.retry_long = old_retry_long;
1350                         rdev->wiphy.frag_threshold = old_frag_threshold;
1351                         rdev->wiphy.rts_threshold = old_rts_threshold;
1352                         rdev->wiphy.coverage_class = old_coverage_class;
1353                 }
1354         }
1355
1356  bad_res:
1357         mutex_unlock(&rdev->mtx);
1358         if (netdev)
1359                 dev_put(netdev);
1360         return result;
1361 }
1362
1363
1364 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1365                               struct cfg80211_registered_device *rdev,
1366                               struct net_device *dev)
1367 {
1368         void *hdr;
1369
1370         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1371         if (!hdr)
1372                 return -1;
1373
1374         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1375         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1376         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1377         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1378
1379         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1380                     rdev->devlist_generation ^
1381                         (cfg80211_rdev_list_generation << 2));
1382
1383         return genlmsg_end(msg, hdr);
1384
1385  nla_put_failure:
1386         genlmsg_cancel(msg, hdr);
1387         return -EMSGSIZE;
1388 }
1389
1390 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1391 {
1392         int wp_idx = 0;
1393         int if_idx = 0;
1394         int wp_start = cb->args[0];
1395         int if_start = cb->args[1];
1396         struct cfg80211_registered_device *rdev;
1397         struct wireless_dev *wdev;
1398
1399         mutex_lock(&cfg80211_mutex);
1400         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1401                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1402                         continue;
1403                 if (wp_idx < wp_start) {
1404                         wp_idx++;
1405                         continue;
1406                 }
1407                 if_idx = 0;
1408
1409                 mutex_lock(&rdev->devlist_mtx);
1410                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1411                         if (if_idx < if_start) {
1412                                 if_idx++;
1413                                 continue;
1414                         }
1415                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1416                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1417                                                rdev, wdev->netdev) < 0) {
1418                                 mutex_unlock(&rdev->devlist_mtx);
1419                                 goto out;
1420                         }
1421                         if_idx++;
1422                 }
1423                 mutex_unlock(&rdev->devlist_mtx);
1424
1425                 wp_idx++;
1426         }
1427  out:
1428         mutex_unlock(&cfg80211_mutex);
1429
1430         cb->args[0] = wp_idx;
1431         cb->args[1] = if_idx;
1432
1433         return skb->len;
1434 }
1435
1436 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1437 {
1438         struct sk_buff *msg;
1439         struct cfg80211_registered_device *dev = info->user_ptr[0];
1440         struct net_device *netdev = info->user_ptr[1];
1441
1442         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1443         if (!msg)
1444                 return -ENOMEM;
1445
1446         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1447                                dev, netdev) < 0) {
1448                 nlmsg_free(msg);
1449                 return -ENOBUFS;
1450         }
1451
1452         return genlmsg_reply(msg, info);
1453 }
1454
1455 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1456         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1457         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1458         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1459         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1460         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1461 };
1462
1463 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1464 {
1465         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1466         int flag;
1467
1468         *mntrflags = 0;
1469
1470         if (!nla)
1471                 return -EINVAL;
1472
1473         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1474                              nla, mntr_flags_policy))
1475                 return -EINVAL;
1476
1477         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1478                 if (flags[flag])
1479                         *mntrflags |= (1<<flag);
1480
1481         return 0;
1482 }
1483
1484 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1485                                struct net_device *netdev, u8 use_4addr,
1486                                enum nl80211_iftype iftype)
1487 {
1488         if (!use_4addr) {
1489                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1490                         return -EBUSY;
1491                 return 0;
1492         }
1493
1494         switch (iftype) {
1495         case NL80211_IFTYPE_AP_VLAN:
1496                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1497                         return 0;
1498                 break;
1499         case NL80211_IFTYPE_STATION:
1500                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1501                         return 0;
1502                 break;
1503         default:
1504                 break;
1505         }
1506
1507         return -EOPNOTSUPP;
1508 }
1509
1510 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1511 {
1512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1513         struct vif_params params;
1514         int err;
1515         enum nl80211_iftype otype, ntype;
1516         struct net_device *dev = info->user_ptr[1];
1517         u32 _flags, *flags = NULL;
1518         bool change = false;
1519
1520         memset(&params, 0, sizeof(params));
1521
1522         otype = ntype = dev->ieee80211_ptr->iftype;
1523
1524         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1525                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1526                 if (otype != ntype)
1527                         change = true;
1528                 if (ntype > NL80211_IFTYPE_MAX)
1529                         return -EINVAL;
1530         }
1531
1532         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1533                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1534
1535                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1536                         return -EINVAL;
1537                 if (netif_running(dev))
1538                         return -EBUSY;
1539
1540                 wdev_lock(wdev);
1541                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1542                              IEEE80211_MAX_MESH_ID_LEN);
1543                 wdev->mesh_id_up_len =
1544                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1545                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1546                        wdev->mesh_id_up_len);
1547                 wdev_unlock(wdev);
1548         }
1549
1550         if (info->attrs[NL80211_ATTR_4ADDR]) {
1551                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1552                 change = true;
1553                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1554                 if (err)
1555                         return err;
1556         } else {
1557                 params.use_4addr = -1;
1558         }
1559
1560         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1561                 if (ntype != NL80211_IFTYPE_MONITOR)
1562                         return -EINVAL;
1563                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1564                                           &_flags);
1565                 if (err)
1566                         return err;
1567
1568                 flags = &_flags;
1569                 change = true;
1570         }
1571
1572         if (change)
1573                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1574         else
1575                 err = 0;
1576
1577         if (!err && params.use_4addr != -1)
1578                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1579
1580         return err;
1581 }
1582
1583 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1584 {
1585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1586         struct vif_params params;
1587         struct net_device *dev;
1588         int err;
1589         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1590         u32 flags;
1591
1592         memset(&params, 0, sizeof(params));
1593
1594         if (!info->attrs[NL80211_ATTR_IFNAME])
1595                 return -EINVAL;
1596
1597         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1598                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1599                 if (type > NL80211_IFTYPE_MAX)
1600                         return -EINVAL;
1601         }
1602
1603         if (!rdev->ops->add_virtual_intf ||
1604             !(rdev->wiphy.interface_modes & (1 << type)))
1605                 return -EOPNOTSUPP;
1606
1607         if (info->attrs[NL80211_ATTR_4ADDR]) {
1608                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1609                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1610                 if (err)
1611                         return err;
1612         }
1613
1614         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1615                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1616                                   &flags);
1617         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1618                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1619                 type, err ? NULL : &flags, &params);
1620         if (IS_ERR(dev))
1621                 return PTR_ERR(dev);
1622
1623         if (type == NL80211_IFTYPE_MESH_POINT &&
1624             info->attrs[NL80211_ATTR_MESH_ID]) {
1625                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1626
1627                 wdev_lock(wdev);
1628                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1629                              IEEE80211_MAX_MESH_ID_LEN);
1630                 wdev->mesh_id_up_len =
1631                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1632                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1633                        wdev->mesh_id_up_len);
1634                 wdev_unlock(wdev);
1635         }
1636
1637         return 0;
1638 }
1639
1640 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1641 {
1642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1643         struct net_device *dev = info->user_ptr[1];
1644
1645         if (!rdev->ops->del_virtual_intf)
1646                 return -EOPNOTSUPP;
1647
1648         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1649 }
1650
1651 struct get_key_cookie {
1652         struct sk_buff *msg;
1653         int error;
1654         int idx;
1655 };
1656
1657 static void get_key_callback(void *c, struct key_params *params)
1658 {
1659         struct nlattr *key;
1660         struct get_key_cookie *cookie = c;
1661
1662         if (params->key)
1663                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1664                         params->key_len, params->key);
1665
1666         if (params->seq)
1667                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1668                         params->seq_len, params->seq);
1669
1670         if (params->cipher)
1671                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1672                             params->cipher);
1673
1674         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1675         if (!key)
1676                 goto nla_put_failure;
1677
1678         if (params->key)
1679                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1680                         params->key_len, params->key);
1681
1682         if (params->seq)
1683                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1684                         params->seq_len, params->seq);
1685
1686         if (params->cipher)
1687                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1688                             params->cipher);
1689
1690         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1691
1692         nla_nest_end(cookie->msg, key);
1693
1694         return;
1695  nla_put_failure:
1696         cookie->error = 1;
1697 }
1698
1699 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1700 {
1701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1702         int err;
1703         struct net_device *dev = info->user_ptr[1];
1704         u8 key_idx = 0;
1705         const u8 *mac_addr = NULL;
1706         bool pairwise;
1707         struct get_key_cookie cookie = {
1708                 .error = 0,
1709         };
1710         void *hdr;
1711         struct sk_buff *msg;
1712
1713         if (info->attrs[NL80211_ATTR_KEY_IDX])
1714                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1715
1716         if (key_idx > 5)
1717                 return -EINVAL;
1718
1719         if (info->attrs[NL80211_ATTR_MAC])
1720                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1721
1722         pairwise = !!mac_addr;
1723         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1724                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1725                 if (kt >= NUM_NL80211_KEYTYPES)
1726                         return -EINVAL;
1727                 if (kt != NL80211_KEYTYPE_GROUP &&
1728                     kt != NL80211_KEYTYPE_PAIRWISE)
1729                         return -EINVAL;
1730                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1731         }
1732
1733         if (!rdev->ops->get_key)
1734                 return -EOPNOTSUPP;
1735
1736         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1737         if (!msg)
1738                 return -ENOMEM;
1739
1740         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1741                              NL80211_CMD_NEW_KEY);
1742         if (IS_ERR(hdr))
1743                 return PTR_ERR(hdr);
1744
1745         cookie.msg = msg;
1746         cookie.idx = key_idx;
1747
1748         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1749         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1750         if (mac_addr)
1751                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1752
1753         if (pairwise && mac_addr &&
1754             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1755                 return -ENOENT;
1756
1757         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1758                                  mac_addr, &cookie, get_key_callback);
1759
1760         if (err)
1761                 goto free_msg;
1762
1763         if (cookie.error)
1764                 goto nla_put_failure;
1765
1766         genlmsg_end(msg, hdr);
1767         return genlmsg_reply(msg, info);
1768
1769  nla_put_failure:
1770         err = -ENOBUFS;
1771  free_msg:
1772         nlmsg_free(msg);
1773         return err;
1774 }
1775
1776 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1777 {
1778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1779         struct key_parse key;
1780         int err;
1781         struct net_device *dev = info->user_ptr[1];
1782
1783         err = nl80211_parse_key(info, &key);
1784         if (err)
1785                 return err;
1786
1787         if (key.idx < 0)
1788                 return -EINVAL;
1789
1790         /* only support setting default key */
1791         if (!key.def && !key.defmgmt)
1792                 return -EINVAL;
1793
1794         wdev_lock(dev->ieee80211_ptr);
1795
1796         if (key.def) {
1797                 if (!rdev->ops->set_default_key) {
1798                         err = -EOPNOTSUPP;
1799                         goto out;
1800                 }
1801
1802                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1803                 if (err)
1804                         goto out;
1805
1806                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1807                                                  key.def_uni, key.def_multi);
1808
1809                 if (err)
1810                         goto out;
1811
1812 #ifdef CONFIG_CFG80211_WEXT
1813                 dev->ieee80211_ptr->wext.default_key = key.idx;
1814 #endif
1815         } else {
1816                 if (key.def_uni || !key.def_multi) {
1817                         err = -EINVAL;
1818                         goto out;
1819                 }
1820
1821                 if (!rdev->ops->set_default_mgmt_key) {
1822                         err = -EOPNOTSUPP;
1823                         goto out;
1824                 }
1825
1826                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1827                 if (err)
1828                         goto out;
1829
1830                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1831                                                       dev, key.idx);
1832                 if (err)
1833                         goto out;
1834
1835 #ifdef CONFIG_CFG80211_WEXT
1836                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1837 #endif
1838         }
1839
1840  out:
1841         wdev_unlock(dev->ieee80211_ptr);
1842
1843         return err;
1844 }
1845
1846 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1847 {
1848         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1849         int err;
1850         struct net_device *dev = info->user_ptr[1];
1851         struct key_parse key;
1852         const u8 *mac_addr = NULL;
1853
1854         err = nl80211_parse_key(info, &key);
1855         if (err)
1856                 return err;
1857
1858         if (!key.p.key)
1859                 return -EINVAL;
1860
1861         if (info->attrs[NL80211_ATTR_MAC])
1862                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1863
1864         if (key.type == -1) {
1865                 if (mac_addr)
1866                         key.type = NL80211_KEYTYPE_PAIRWISE;
1867                 else
1868                         key.type = NL80211_KEYTYPE_GROUP;
1869         }
1870
1871         /* for now */
1872         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1873             key.type != NL80211_KEYTYPE_GROUP)
1874                 return -EINVAL;
1875
1876         if (!rdev->ops->add_key)
1877                 return -EOPNOTSUPP;
1878
1879         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1880                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1881                                            mac_addr))
1882                 return -EINVAL;
1883
1884         wdev_lock(dev->ieee80211_ptr);
1885         err = nl80211_key_allowed(dev->ieee80211_ptr);
1886         if (!err)
1887                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1888                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1889                                          mac_addr, &key.p);
1890         wdev_unlock(dev->ieee80211_ptr);
1891
1892         return err;
1893 }
1894
1895 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1896 {
1897         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1898         int err;
1899         struct net_device *dev = info->user_ptr[1];
1900         u8 *mac_addr = NULL;
1901         struct key_parse key;
1902
1903         err = nl80211_parse_key(info, &key);
1904         if (err)
1905                 return err;
1906
1907         if (info->attrs[NL80211_ATTR_MAC])
1908                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1909
1910         if (key.type == -1) {
1911                 if (mac_addr)
1912                         key.type = NL80211_KEYTYPE_PAIRWISE;
1913                 else
1914                         key.type = NL80211_KEYTYPE_GROUP;
1915         }
1916
1917         /* for now */
1918         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1919             key.type != NL80211_KEYTYPE_GROUP)
1920                 return -EINVAL;
1921
1922         if (!rdev->ops->del_key)
1923                 return -EOPNOTSUPP;
1924
1925         wdev_lock(dev->ieee80211_ptr);
1926         err = nl80211_key_allowed(dev->ieee80211_ptr);
1927
1928         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1929             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1930                 err = -ENOENT;
1931
1932         if (!err)
1933                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1934                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1935                                          mac_addr);
1936
1937 #ifdef CONFIG_CFG80211_WEXT
1938         if (!err) {
1939                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1940                         dev->ieee80211_ptr->wext.default_key = -1;
1941                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1942                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1943         }
1944 #endif
1945         wdev_unlock(dev->ieee80211_ptr);
1946
1947         return err;
1948 }
1949
1950 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1951 {
1952         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1953                     struct beacon_parameters *info);
1954         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1955         struct net_device *dev = info->user_ptr[1];
1956         struct wireless_dev *wdev = dev->ieee80211_ptr;
1957         struct beacon_parameters params;
1958         int haveinfo = 0, err;
1959
1960         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1961                 return -EINVAL;
1962
1963         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1964             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1965                 return -EOPNOTSUPP;
1966
1967         memset(&params, 0, sizeof(params));
1968
1969         switch (info->genlhdr->cmd) {
1970         case NL80211_CMD_NEW_BEACON:
1971                 /* these are required for NEW_BEACON */
1972                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1973                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1974                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1975                         return -EINVAL;
1976
1977                 params.interval =
1978                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1979                 params.dtim_period =
1980                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1981
1982                 err = cfg80211_validate_beacon_int(rdev, params.interval);
1983                 if (err)
1984                         return err;
1985
1986                 call = rdev->ops->add_beacon;
1987                 break;
1988         case NL80211_CMD_SET_BEACON:
1989                 call = rdev->ops->set_beacon;
1990                 break;
1991         default:
1992                 WARN_ON(1);
1993                 return -EOPNOTSUPP;
1994         }
1995
1996         if (!call)
1997                 return -EOPNOTSUPP;
1998
1999         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2000                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2001                 params.head_len =
2002                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2003                 haveinfo = 1;
2004         }
2005
2006         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2007                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2008                 params.tail_len =
2009                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2010                 haveinfo = 1;
2011         }
2012
2013         if (!haveinfo)
2014                 return -EINVAL;
2015
2016         err = call(&rdev->wiphy, dev, &params);
2017         if (!err && params.interval)
2018                 wdev->beacon_interval = params.interval;
2019         return err;
2020 }
2021
2022 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
2023 {
2024         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2025         struct net_device *dev = info->user_ptr[1];
2026         struct wireless_dev *wdev = dev->ieee80211_ptr;
2027         int err;
2028
2029         if (!rdev->ops->del_beacon)
2030                 return -EOPNOTSUPP;
2031
2032         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2033             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2034                 return -EOPNOTSUPP;
2035
2036         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
2037         if (!err)
2038                 wdev->beacon_interval = 0;
2039         return err;
2040 }
2041
2042 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2043         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2044         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2045         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2046         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2047         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2048 };
2049
2050 static int parse_station_flags(struct genl_info *info,
2051                                struct station_parameters *params)
2052 {
2053         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2054         struct nlattr *nla;
2055         int flag;
2056
2057         /*
2058          * Try parsing the new attribute first so userspace
2059          * can specify both for older kernels.
2060          */
2061         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2062         if (nla) {
2063                 struct nl80211_sta_flag_update *sta_flags;
2064
2065                 sta_flags = nla_data(nla);
2066                 params->sta_flags_mask = sta_flags->mask;
2067                 params->sta_flags_set = sta_flags->set;
2068                 if ((params->sta_flags_mask |
2069                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2070                         return -EINVAL;
2071                 return 0;
2072         }
2073
2074         /* if present, parse the old attribute */
2075
2076         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2077         if (!nla)
2078                 return 0;
2079
2080         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2081                              nla, sta_flags_policy))
2082                 return -EINVAL;
2083
2084         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
2085         params->sta_flags_mask &= ~1;
2086
2087         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2088                 if (flags[flag])
2089                         params->sta_flags_set |= (1<<flag);
2090
2091         return 0;
2092 }
2093
2094 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2095                                  int attr)
2096 {
2097         struct nlattr *rate;
2098         u16 bitrate;
2099
2100         rate = nla_nest_start(msg, attr);
2101         if (!rate)
2102                 goto nla_put_failure;
2103
2104         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2105         bitrate = cfg80211_calculate_bitrate(info);
2106         if (bitrate > 0)
2107                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2108
2109         if (info->flags & RATE_INFO_FLAGS_MCS)
2110                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2111         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2112                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2113         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2114                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2115
2116         nla_nest_end(msg, rate);
2117         return true;
2118
2119 nla_put_failure:
2120         return false;
2121 }
2122
2123 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2124                                 int flags, struct net_device *dev,
2125                                 const u8 *mac_addr, struct station_info *sinfo)
2126 {
2127         void *hdr;
2128         struct nlattr *sinfoattr, *bss_param;
2129
2130         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2131         if (!hdr)
2132                 return -1;
2133
2134         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2135         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2136
2137         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2138
2139         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2140         if (!sinfoattr)
2141                 goto nla_put_failure;
2142         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2143                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2144                             sinfo->connected_time);
2145         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2146                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2147                             sinfo->inactive_time);
2148         if (sinfo->filled & STATION_INFO_RX_BYTES)
2149                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2150                             sinfo->rx_bytes);
2151         if (sinfo->filled & STATION_INFO_TX_BYTES)
2152                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2153                             sinfo->tx_bytes);
2154         if (sinfo->filled & STATION_INFO_LLID)
2155                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2156                             sinfo->llid);
2157         if (sinfo->filled & STATION_INFO_PLID)
2158                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2159                             sinfo->plid);
2160         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2161                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2162                             sinfo->plink_state);
2163         if (sinfo->filled & STATION_INFO_SIGNAL)
2164                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2165                            sinfo->signal);
2166         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2167                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2168                            sinfo->signal_avg);
2169         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2170                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2171                                           NL80211_STA_INFO_TX_BITRATE))
2172                         goto nla_put_failure;
2173         }
2174         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2175                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2176                                           NL80211_STA_INFO_RX_BITRATE))
2177                         goto nla_put_failure;
2178         }
2179         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2180                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2181                             sinfo->rx_packets);
2182         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2183                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2184                             sinfo->tx_packets);
2185         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2186                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2187                             sinfo->tx_retries);
2188         if (sinfo->filled & STATION_INFO_TX_FAILED)
2189                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2190                             sinfo->tx_failed);
2191         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2192                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2193                 if (!bss_param)
2194                         goto nla_put_failure;
2195
2196                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2197                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2198                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2199                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2200                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2201                         NLA_PUT_FLAG(msg,
2202                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2203                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2204                            sinfo->bss_param.dtim_period);
2205                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2206                             sinfo->bss_param.beacon_interval);
2207
2208                 nla_nest_end(msg, bss_param);
2209         }
2210         nla_nest_end(msg, sinfoattr);
2211
2212         return genlmsg_end(msg, hdr);
2213
2214  nla_put_failure:
2215         genlmsg_cancel(msg, hdr);
2216         return -EMSGSIZE;
2217 }
2218
2219 static int nl80211_dump_station(struct sk_buff *skb,
2220                                 struct netlink_callback *cb)
2221 {
2222         struct station_info sinfo;
2223         struct cfg80211_registered_device *dev;
2224         struct net_device *netdev;
2225         u8 mac_addr[ETH_ALEN];
2226         int sta_idx = cb->args[1];
2227         int err;
2228
2229         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2230         if (err)
2231                 return err;
2232
2233         if (!dev->ops->dump_station) {
2234                 err = -EOPNOTSUPP;
2235                 goto out_err;
2236         }
2237
2238         while (1) {
2239                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2240                                              mac_addr, &sinfo);
2241                 if (err == -ENOENT)
2242                         break;
2243                 if (err)
2244                         goto out_err;
2245
2246                 if (nl80211_send_station(skb,
2247                                 NETLINK_CB(cb->skb).pid,
2248                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2249                                 netdev, mac_addr,
2250                                 &sinfo) < 0)
2251                         goto out;
2252
2253                 sta_idx++;
2254         }
2255
2256
2257  out:
2258         cb->args[1] = sta_idx;
2259         err = skb->len;
2260  out_err:
2261         nl80211_finish_netdev_dump(dev);
2262
2263         return err;
2264 }
2265
2266 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2267 {
2268         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2269         struct net_device *dev = info->user_ptr[1];
2270         struct station_info sinfo;
2271         struct sk_buff *msg;
2272         u8 *mac_addr = NULL;
2273         int err;
2274
2275         memset(&sinfo, 0, sizeof(sinfo));
2276
2277         if (!info->attrs[NL80211_ATTR_MAC])
2278                 return -EINVAL;
2279
2280         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2281
2282         if (!rdev->ops->get_station)
2283                 return -EOPNOTSUPP;
2284
2285         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2286         if (err)
2287                 return err;
2288
2289         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2290         if (!msg)
2291                 return -ENOMEM;
2292
2293         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2294                                  dev, mac_addr, &sinfo) < 0) {
2295                 nlmsg_free(msg);
2296                 return -ENOBUFS;
2297         }
2298
2299         return genlmsg_reply(msg, info);
2300 }
2301
2302 /*
2303  * Get vlan interface making sure it is running and on the right wiphy.
2304  */
2305 static int get_vlan(struct genl_info *info,
2306                     struct cfg80211_registered_device *rdev,
2307                     struct net_device **vlan)
2308 {
2309         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2310         *vlan = NULL;
2311
2312         if (vlanattr) {
2313                 *vlan = dev_get_by_index(genl_info_net(info),
2314                                          nla_get_u32(vlanattr));
2315                 if (!*vlan)
2316                         return -ENODEV;
2317                 if (!(*vlan)->ieee80211_ptr)
2318                         return -EINVAL;
2319                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2320                         return -EINVAL;
2321                 if (!netif_running(*vlan))
2322                         return -ENETDOWN;
2323         }
2324         return 0;
2325 }
2326
2327 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2328 {
2329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2330         int err;
2331         struct net_device *dev = info->user_ptr[1];
2332         struct station_parameters params;
2333         u8 *mac_addr = NULL;
2334
2335         memset(&params, 0, sizeof(params));
2336
2337         params.listen_interval = -1;
2338         params.plink_state = -1;
2339
2340         if (info->attrs[NL80211_ATTR_STA_AID])
2341                 return -EINVAL;
2342
2343         if (!info->attrs[NL80211_ATTR_MAC])
2344                 return -EINVAL;
2345
2346         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2347
2348         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2349                 params.supported_rates =
2350                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2351                 params.supported_rates_len =
2352                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2353         }
2354
2355         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2356                 params.listen_interval =
2357                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2358
2359         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2360                 params.ht_capa =
2361                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2362
2363         if (parse_station_flags(info, &params))
2364                 return -EINVAL;
2365
2366         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2367                 params.plink_action =
2368                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2369
2370         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2371                 params.plink_state =
2372                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2373
2374         err = get_vlan(info, rdev, &params.vlan);
2375         if (err)
2376                 goto out;
2377
2378         /* validate settings */
2379         err = 0;
2380
2381         switch (dev->ieee80211_ptr->iftype) {
2382         case NL80211_IFTYPE_AP:
2383         case NL80211_IFTYPE_AP_VLAN:
2384         case NL80211_IFTYPE_P2P_GO:
2385                 /* disallow mesh-specific things */
2386                 if (params.plink_action)
2387                         err = -EINVAL;
2388                 break;
2389         case NL80211_IFTYPE_P2P_CLIENT:
2390         case NL80211_IFTYPE_STATION:
2391                 /* disallow everything but AUTHORIZED flag */
2392                 if (params.plink_action)
2393                         err = -EINVAL;
2394                 if (params.vlan)
2395                         err = -EINVAL;
2396                 if (params.supported_rates)
2397                         err = -EINVAL;
2398                 if (params.ht_capa)
2399                         err = -EINVAL;
2400                 if (params.listen_interval >= 0)
2401                         err = -EINVAL;
2402                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2403                         err = -EINVAL;
2404                 break;
2405         case NL80211_IFTYPE_MESH_POINT:
2406                 /* disallow things mesh doesn't support */
2407                 if (params.vlan)
2408                         err = -EINVAL;
2409                 if (params.ht_capa)
2410                         err = -EINVAL;
2411                 if (params.listen_interval >= 0)
2412                         err = -EINVAL;
2413                 if (params.sta_flags_mask &
2414                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2415                                   BIT(NL80211_STA_FLAG_MFP) |
2416                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2417                         err = -EINVAL;
2418                 break;
2419         default:
2420                 err = -EINVAL;
2421         }
2422
2423         if (err)
2424                 goto out;
2425
2426         if (!rdev->ops->change_station) {
2427                 err = -EOPNOTSUPP;
2428                 goto out;
2429         }
2430
2431         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2432
2433  out:
2434         if (params.vlan)
2435                 dev_put(params.vlan);
2436
2437         return err;
2438 }
2439
2440 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2441 {
2442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2443         int err;
2444         struct net_device *dev = info->user_ptr[1];
2445         struct station_parameters params;
2446         u8 *mac_addr = NULL;
2447
2448         memset(&params, 0, sizeof(params));
2449
2450         if (!info->attrs[NL80211_ATTR_MAC])
2451                 return -EINVAL;
2452
2453         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2454                 return -EINVAL;
2455
2456         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2457                 return -EINVAL;
2458
2459         if (!info->attrs[NL80211_ATTR_STA_AID])
2460                 return -EINVAL;
2461
2462         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2463         params.supported_rates =
2464                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2465         params.supported_rates_len =
2466                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2467         params.listen_interval =
2468                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2469
2470         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2471         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2472                 return -EINVAL;
2473
2474         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2475                 params.ht_capa =
2476                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2477
2478         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2479                 params.plink_action =
2480                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2481
2482         if (parse_station_flags(info, &params))
2483                 return -EINVAL;
2484
2485         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2486             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2487             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2488             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2489                 return -EINVAL;
2490
2491         err = get_vlan(info, rdev, &params.vlan);
2492         if (err)
2493                 goto out;
2494
2495         /* validate settings */
2496         err = 0;
2497
2498         if (!rdev->ops->add_station) {
2499                 err = -EOPNOTSUPP;
2500                 goto out;
2501         }
2502
2503         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2504
2505  out:
2506         if (params.vlan)
2507                 dev_put(params.vlan);
2508         return err;
2509 }
2510
2511 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2512 {
2513         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2514         struct net_device *dev = info->user_ptr[1];
2515         u8 *mac_addr = NULL;
2516
2517         if (info->attrs[NL80211_ATTR_MAC])
2518                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2519
2520         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2521             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2522             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2523             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2524                 return -EINVAL;
2525
2526         if (!rdev->ops->del_station)
2527                 return -EOPNOTSUPP;
2528
2529         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2530 }
2531
2532 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2533                                 int flags, struct net_device *dev,
2534                                 u8 *dst, u8 *next_hop,
2535                                 struct mpath_info *pinfo)
2536 {
2537         void *hdr;
2538         struct nlattr *pinfoattr;
2539
2540         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2541         if (!hdr)
2542                 return -1;
2543
2544         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2545         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2546         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2547
2548         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2549
2550         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2551         if (!pinfoattr)
2552                 goto nla_put_failure;
2553         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2554                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2555                             pinfo->frame_qlen);
2556         if (pinfo->filled & MPATH_INFO_SN)
2557                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2558                             pinfo->sn);
2559         if (pinfo->filled & MPATH_INFO_METRIC)
2560                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2561                             pinfo->metric);
2562         if (pinfo->filled & MPATH_INFO_EXPTIME)
2563                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2564                             pinfo->exptime);
2565         if (pinfo->filled & MPATH_INFO_FLAGS)
2566                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2567                             pinfo->flags);
2568         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2569                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2570                             pinfo->discovery_timeout);
2571         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2572                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2573                             pinfo->discovery_retries);
2574
2575         nla_nest_end(msg, pinfoattr);
2576
2577         return genlmsg_end(msg, hdr);
2578
2579  nla_put_failure:
2580         genlmsg_cancel(msg, hdr);
2581         return -EMSGSIZE;
2582 }
2583
2584 static int nl80211_dump_mpath(struct sk_buff *skb,
2585                               struct netlink_callback *cb)
2586 {
2587         struct mpath_info pinfo;
2588         struct cfg80211_registered_device *dev;
2589         struct net_device *netdev;
2590         u8 dst[ETH_ALEN];
2591         u8 next_hop[ETH_ALEN];
2592         int path_idx = cb->args[1];
2593         int err;
2594
2595         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2596         if (err)
2597                 return err;
2598
2599         if (!dev->ops->dump_mpath) {
2600                 err = -EOPNOTSUPP;
2601                 goto out_err;
2602         }
2603
2604         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2605                 err = -EOPNOTSUPP;
2606                 goto out_err;
2607         }
2608
2609         while (1) {
2610                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2611                                            dst, next_hop, &pinfo);
2612                 if (err == -ENOENT)
2613                         break;
2614                 if (err)
2615                         goto out_err;
2616
2617                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2618                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2619                                        netdev, dst, next_hop,
2620                                        &pinfo) < 0)
2621                         goto out;
2622
2623                 path_idx++;
2624         }
2625
2626
2627  out:
2628         cb->args[1] = path_idx;
2629         err = skb->len;
2630  out_err:
2631         nl80211_finish_netdev_dump(dev);
2632         return err;
2633 }
2634
2635 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2636 {
2637         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2638         int err;
2639         struct net_device *dev = info->user_ptr[1];
2640         struct mpath_info pinfo;
2641         struct sk_buff *msg;
2642         u8 *dst = NULL;
2643         u8 next_hop[ETH_ALEN];
2644
2645         memset(&pinfo, 0, sizeof(pinfo));
2646
2647         if (!info->attrs[NL80211_ATTR_MAC])
2648                 return -EINVAL;
2649
2650         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2651
2652         if (!rdev->ops->get_mpath)
2653                 return -EOPNOTSUPP;
2654
2655         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2656                 return -EOPNOTSUPP;
2657
2658         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2659         if (err)
2660                 return err;
2661
2662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2663         if (!msg)
2664                 return -ENOMEM;
2665
2666         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2667                                  dev, dst, next_hop, &pinfo) < 0) {
2668                 nlmsg_free(msg);
2669                 return -ENOBUFS;
2670         }
2671
2672         return genlmsg_reply(msg, info);
2673 }
2674
2675 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2676 {
2677         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2678         struct net_device *dev = info->user_ptr[1];
2679         u8 *dst = NULL;
2680         u8 *next_hop = NULL;
2681
2682         if (!info->attrs[NL80211_ATTR_MAC])
2683                 return -EINVAL;
2684
2685         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2686                 return -EINVAL;
2687
2688         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2689         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2690
2691         if (!rdev->ops->change_mpath)
2692                 return -EOPNOTSUPP;
2693
2694         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2695                 return -EOPNOTSUPP;
2696
2697         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2698 }
2699
2700 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2701 {
2702         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2703         struct net_device *dev = info->user_ptr[1];
2704         u8 *dst = NULL;
2705         u8 *next_hop = NULL;
2706
2707         if (!info->attrs[NL80211_ATTR_MAC])
2708                 return -EINVAL;
2709
2710         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2711                 return -EINVAL;
2712
2713         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2714         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2715
2716         if (!rdev->ops->add_mpath)
2717                 return -EOPNOTSUPP;
2718
2719         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2720                 return -EOPNOTSUPP;
2721
2722         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2723 }
2724
2725 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2726 {
2727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2728         struct net_device *dev = info->user_ptr[1];
2729         u8 *dst = NULL;
2730
2731         if (info->attrs[NL80211_ATTR_MAC])
2732                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2733
2734         if (!rdev->ops->del_mpath)
2735                 return -EOPNOTSUPP;
2736
2737         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2738 }
2739
2740 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2741 {
2742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2743         struct net_device *dev = info->user_ptr[1];
2744         struct bss_parameters params;
2745
2746         memset(&params, 0, sizeof(params));
2747         /* default to not changing parameters */
2748         params.use_cts_prot = -1;
2749         params.use_short_preamble = -1;
2750         params.use_short_slot_time = -1;
2751         params.ap_isolate = -1;
2752         params.ht_opmode = -1;
2753
2754         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2755                 params.use_cts_prot =
2756                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2757         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2758                 params.use_short_preamble =
2759                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2760         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2761                 params.use_short_slot_time =
2762                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2763         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2764                 params.basic_rates =
2765                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2766                 params.basic_rates_len =
2767                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2768         }
2769         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2770                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2771         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2772                 params.ht_opmode =
2773                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2774
2775         if (!rdev->ops->change_bss)
2776                 return -EOPNOTSUPP;
2777
2778         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2779             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2780                 return -EOPNOTSUPP;
2781
2782         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2783 }
2784
2785 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2786         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2787         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2788         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2789         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2790         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2791         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2792 };
2793
2794 static int parse_reg_rule(struct nlattr *tb[],
2795         struct ieee80211_reg_rule *reg_rule)
2796 {
2797         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2798         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2799
2800         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2801                 return -EINVAL;
2802         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2803                 return -EINVAL;
2804         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2805                 return -EINVAL;
2806         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2807                 return -EINVAL;
2808         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2809                 return -EINVAL;
2810
2811         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2812
2813         freq_range->start_freq_khz =
2814                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2815         freq_range->end_freq_khz =
2816                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2817         freq_range->max_bandwidth_khz =
2818                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2819
2820         power_rule->max_eirp =
2821                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2822
2823         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2824                 power_rule->max_antenna_gain =
2825                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2826
2827         return 0;
2828 }
2829
2830 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2831 {
2832         int r;
2833         char *data = NULL;
2834
2835         /*
2836          * You should only get this when cfg80211 hasn't yet initialized
2837          * completely when built-in to the kernel right between the time
2838          * window between nl80211_init() and regulatory_init(), if that is
2839          * even possible.
2840          */
2841         mutex_lock(&cfg80211_mutex);
2842         if (unlikely(!cfg80211_regdomain)) {
2843                 mutex_unlock(&cfg80211_mutex);
2844                 return -EINPROGRESS;
2845         }
2846         mutex_unlock(&cfg80211_mutex);
2847
2848         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2849                 return -EINVAL;
2850
2851         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2852
2853         r = regulatory_hint_user(data);
2854
2855         return r;
2856 }
2857
2858 static int nl80211_get_mesh_config(struct sk_buff *skb,
2859                                    struct genl_info *info)
2860 {
2861         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2862         struct net_device *dev = info->user_ptr[1];
2863         struct wireless_dev *wdev = dev->ieee80211_ptr;
2864         struct mesh_config cur_params;
2865         int err = 0;
2866         void *hdr;
2867         struct nlattr *pinfoattr;
2868         struct sk_buff *msg;
2869
2870         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2871                 return -EOPNOTSUPP;
2872
2873         if (!rdev->ops->get_mesh_config)
2874                 return -EOPNOTSUPP;
2875
2876         wdev_lock(wdev);
2877         /* If not connected, get default parameters */
2878         if (!wdev->mesh_id_len)
2879                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2880         else
2881                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
2882                                                  &cur_params);
2883         wdev_unlock(wdev);
2884
2885         if (err)
2886                 return err;
2887
2888         /* Draw up a netlink message to send back */
2889         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2890         if (!msg)
2891                 return -ENOMEM;
2892         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2893                              NL80211_CMD_GET_MESH_CONFIG);
2894         if (!hdr)
2895                 goto out;
2896         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
2897         if (!pinfoattr)
2898                 goto nla_put_failure;
2899         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2900         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2901                         cur_params.dot11MeshRetryTimeout);
2902         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2903                         cur_params.dot11MeshConfirmTimeout);
2904         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2905                         cur_params.dot11MeshHoldingTimeout);
2906         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2907                         cur_params.dot11MeshMaxPeerLinks);
2908         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2909                         cur_params.dot11MeshMaxRetries);
2910         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2911                         cur_params.dot11MeshTTL);
2912         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2913                         cur_params.element_ttl);
2914         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2915                         cur_params.auto_open_plinks);
2916         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2917                         cur_params.dot11MeshHWMPmaxPREQretries);
2918         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2919                         cur_params.path_refresh_time);
2920         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2921                         cur_params.min_discovery_timeout);
2922         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2923                         cur_params.dot11MeshHWMPactivePathTimeout);
2924         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2925                         cur_params.dot11MeshHWMPpreqMinInterval);
2926         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2927                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2928         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2929                         cur_params.dot11MeshHWMPRootMode);
2930         nla_nest_end(msg, pinfoattr);
2931         genlmsg_end(msg, hdr);
2932         return genlmsg_reply(msg, info);
2933
2934  nla_put_failure:
2935         genlmsg_cancel(msg, hdr);
2936  out:
2937         nlmsg_free(msg);
2938         return -ENOBUFS;
2939 }
2940
2941 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2942         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2943         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2944         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2945         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2946         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2947         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2948         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2949         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2950
2951         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2952         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2953         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2954         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2955         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2956         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2957 };
2958
2959 static const struct nla_policy
2960         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
2961         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
2962         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
2963         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
2964         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
2965                 .len = IEEE80211_MAX_DATA_LEN },
2966         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
2967 };
2968
2969 static int nl80211_parse_mesh_config(struct genl_info *info,
2970                                      struct mesh_config *cfg,
2971                                      u32 *mask_out)
2972 {
2973         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2974         u32 mask = 0;
2975
2976 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2977 do {\
2978         if (table[attr_num]) {\
2979                 cfg->param = nla_fn(table[attr_num]); \
2980                 mask |= (1 << (attr_num - 1)); \
2981         } \
2982 } while (0);\
2983
2984
2985         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
2986                 return -EINVAL;
2987         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2988                              info->attrs[NL80211_ATTR_MESH_CONFIG],
2989                              nl80211_meshconf_params_policy))
2990                 return -EINVAL;
2991
2992         /* This makes sure that there aren't more than 32 mesh config
2993          * parameters (otherwise our bitfield scheme would not work.) */
2994         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2995
2996         /* Fill in the params struct */
2997         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2998                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2999         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3000                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3001         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3002                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3003         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3004                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3005         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3006                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3007         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3008                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3009         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3010                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3011         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3012                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3013         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3014                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3015                         nla_get_u8);
3016         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3017                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3018         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3019                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3020                         nla_get_u16);
3021         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3022                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3023                         nla_get_u32);
3024         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3025                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3026                         nla_get_u16);
3027         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3028                         dot11MeshHWMPnetDiameterTraversalTime,
3029                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3030                         nla_get_u16);
3031         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3032                         dot11MeshHWMPRootMode, mask,
3033                         NL80211_MESHCONF_HWMP_ROOTMODE,
3034                         nla_get_u8);
3035         if (mask_out)
3036                 *mask_out = mask;
3037
3038         return 0;
3039
3040 #undef FILL_IN_MESH_PARAM_IF_SET
3041 }
3042
3043 static int nl80211_parse_mesh_setup(struct genl_info *info,
3044                                      struct mesh_setup *setup)
3045 {
3046         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3047
3048         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3049                 return -EINVAL;
3050         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3051                              info->attrs[NL80211_ATTR_MESH_SETUP],
3052                              nl80211_mesh_setup_params_policy))
3053                 return -EINVAL;
3054
3055         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3056                 setup->path_sel_proto =
3057                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3058                  IEEE80211_PATH_PROTOCOL_VENDOR :
3059                  IEEE80211_PATH_PROTOCOL_HWMP;
3060
3061         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3062                 setup->path_metric =
3063                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3064                  IEEE80211_PATH_METRIC_VENDOR :
3065                  IEEE80211_PATH_METRIC_AIRTIME;
3066
3067
3068         if (tb[NL80211_MESH_SETUP_IE]) {
3069                 struct nlattr *ieattr =
3070                         tb[NL80211_MESH_SETUP_IE];
3071                 if (!is_valid_ie_attr(ieattr))
3072                         return -EINVAL;
3073                 setup->ie = nla_data(ieattr);
3074                 setup->ie_len = nla_len(ieattr);
3075         }
3076         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3077         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3078
3079         return 0;
3080 }
3081
3082 static int nl80211_update_mesh_config(struct sk_buff *skb,
3083                                       struct genl_info *info)
3084 {
3085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3086         struct net_device *dev = info->user_ptr[1];
3087         struct wireless_dev *wdev = dev->ieee80211_ptr;
3088         struct mesh_config cfg;
3089         u32 mask;
3090         int err;
3091
3092         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3093                 return -EOPNOTSUPP;
3094
3095         if (!rdev->ops->update_mesh_config)
3096                 return -EOPNOTSUPP;
3097
3098         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3099         if (err)
3100                 return err;
3101
3102         wdev_lock(wdev);
3103         if (!wdev->mesh_id_len)
3104                 err = -ENOLINK;
3105
3106         if (!err)
3107                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3108                                                     mask, &cfg);
3109
3110         wdev_unlock(wdev);
3111
3112         return err;
3113 }
3114
3115 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3116 {
3117         struct sk_buff *msg;
3118         void *hdr = NULL;
3119         struct nlattr *nl_reg_rules;
3120         unsigned int i;
3121         int err = -EINVAL;
3122
3123         mutex_lock(&cfg80211_mutex);
3124
3125         if (!cfg80211_regdomain)
3126                 goto out;
3127
3128         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3129         if (!msg) {
3130                 err = -ENOBUFS;
3131                 goto out;
3132         }
3133
3134         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3135                              NL80211_CMD_GET_REG);
3136         if (!hdr)
3137                 goto put_failure;
3138
3139         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3140                 cfg80211_regdomain->alpha2);
3141
3142         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3143         if (!nl_reg_rules)
3144                 goto nla_put_failure;
3145
3146         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3147                 struct nlattr *nl_reg_rule;
3148                 const struct ieee80211_reg_rule *reg_rule;
3149                 const struct ieee80211_freq_range *freq_range;
3150                 const struct ieee80211_power_rule *power_rule;
3151
3152                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3153                 freq_range = &reg_rule->freq_range;
3154                 power_rule = &reg_rule->power_rule;
3155
3156                 nl_reg_rule = nla_nest_start(msg, i);
3157                 if (!nl_reg_rule)
3158                         goto nla_put_failure;
3159
3160                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3161                         reg_rule->flags);
3162                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3163                         freq_range->start_freq_khz);
3164                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3165                         freq_range->end_freq_khz);
3166                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3167                         freq_range->max_bandwidth_khz);
3168                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3169                         power_rule->max_antenna_gain);
3170                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3171                         power_rule->max_eirp);
3172
3173                 nla_nest_end(msg, nl_reg_rule);
3174         }
3175
3176         nla_nest_end(msg, nl_reg_rules);
3177
3178         genlmsg_end(msg, hdr);
3179         err = genlmsg_reply(msg, info);
3180         goto out;
3181
3182 nla_put_failure:
3183         genlmsg_cancel(msg, hdr);
3184 put_failure:
3185         nlmsg_free(msg);
3186         err = -EMSGSIZE;
3187 out:
3188         mutex_unlock(&cfg80211_mutex);
3189         return err;
3190 }
3191
3192 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3193 {
3194         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3195         struct nlattr *nl_reg_rule;
3196         char *alpha2 = NULL;
3197         int rem_reg_rules = 0, r = 0;
3198         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3199         struct ieee80211_regdomain *rd = NULL;
3200
3201         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3202                 return -EINVAL;
3203
3204         if (!info->attrs[NL80211_ATTR_REG_RULES])
3205                 return -EINVAL;
3206
3207         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3208
3209         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3210                         rem_reg_rules) {
3211                 num_rules++;
3212                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3213                         return -EINVAL;
3214         }
3215
3216         mutex_lock(&cfg80211_mutex);
3217
3218         if (!reg_is_valid_request(alpha2)) {
3219                 r = -EINVAL;
3220                 goto bad_reg;
3221         }
3222
3223         size_of_regd = sizeof(struct ieee80211_regdomain) +
3224                 (num_rules * sizeof(struct ieee80211_reg_rule));
3225
3226         rd = kzalloc(size_of_regd, GFP_KERNEL);
3227         if (!rd) {
3228                 r = -ENOMEM;
3229                 goto bad_reg;
3230         }
3231
3232         rd->n_reg_rules = num_rules;
3233         rd->alpha2[0] = alpha2[0];
3234         rd->alpha2[1] = alpha2[1];
3235
3236         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3237                         rem_reg_rules) {
3238                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3239                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3240                         reg_rule_policy);
3241                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3242                 if (r)
3243                         goto bad_reg;
3244
3245                 rule_idx++;
3246
3247                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3248                         r = -EINVAL;
3249                         goto bad_reg;
3250                 }
3251         }
3252
3253         BUG_ON(rule_idx != num_rules);
3254
3255         r = set_regdom(rd);
3256
3257         mutex_unlock(&cfg80211_mutex);
3258
3259         return r;
3260
3261  bad_reg:
3262         mutex_unlock(&cfg80211_mutex);
3263         kfree(rd);
3264         return r;
3265 }
3266
3267 static int validate_scan_freqs(struct nlattr *freqs)
3268 {
3269         struct nlattr *attr1, *attr2;
3270         int n_channels = 0, tmp1, tmp2;
3271
3272         nla_for_each_nested(attr1, freqs, tmp1) {
3273                 n_channels++;
3274                 /*
3275                  * Some hardware has a limited channel list for
3276                  * scanning, and it is pretty much nonsensical
3277                  * to scan for a channel twice, so disallow that
3278                  * and don't require drivers to check that the
3279                  * channel list they get isn't longer than what
3280                  * they can scan, as long as they can scan all
3281                  * the channels they registered at once.
3282                  */
3283                 nla_for_each_nested(attr2, freqs, tmp2)
3284                         if (attr1 != attr2 &&
3285                             nla_get_u32(attr1) == nla_get_u32(attr2))
3286                                 return 0;
3287         }
3288
3289         return n_channels;
3290 }
3291
3292 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3293 {
3294         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3295         struct net_device *dev = info->user_ptr[1];
3296         struct cfg80211_scan_request *request;
3297         struct cfg80211_ssid *ssid;
3298         struct ieee80211_channel *channel;
3299         struct nlattr *attr;
3300         struct wiphy *wiphy;
3301         int err, tmp, n_ssids = 0, n_channels, i;
3302         enum ieee80211_band band;
3303         size_t ie_len;
3304
3305         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3306                 return -EINVAL;
3307
3308         wiphy = &rdev->wiphy;
3309
3310         if (!rdev->ops->scan)
3311                 return -EOPNOTSUPP;
3312
3313         if (rdev->scan_req)
3314                 return -EBUSY;
3315
3316         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3317                 n_channels = validate_scan_freqs(
3318                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3319                 if (!n_channels)
3320                         return -EINVAL;
3321         } else {
3322                 n_channels = 0;
3323
3324                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3325                         if (wiphy->bands[band])
3326                                 n_channels += wiphy->bands[band]->n_channels;
3327         }
3328
3329         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3330                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3331                         n_ssids++;
3332
3333         if (n_ssids > wiphy->max_scan_ssids)
3334                 return -EINVAL;
3335
3336         if (info->attrs[NL80211_ATTR_IE])
3337                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3338         else
3339                 ie_len = 0;
3340
3341         if (ie_len > wiphy->max_scan_ie_len)
3342                 return -EINVAL;
3343
3344         request = kzalloc(sizeof(*request)
3345                         + sizeof(*ssid) * n_ssids
3346                         + sizeof(channel) * n_channels
3347                         + ie_len, GFP_KERNEL);
3348         if (!request)
3349                 return -ENOMEM;
3350
3351         if (n_ssids)
3352                 request->ssids = (void *)&request->channels[n_channels];
3353         request->n_ssids = n_ssids;
3354         if (ie_len) {
3355                 if (request->ssids)
3356                         request->ie = (void *)(request->ssids + n_ssids);
3357                 else
3358                         request->ie = (void *)(request->channels + n_channels);
3359         }
3360
3361         i = 0;
3362         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3363                 /* user specified, bail out if channel not found */
3364                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3365                         struct ieee80211_channel *chan;
3366
3367                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3368
3369                         if (!chan) {
3370                                 err = -EINVAL;
3371                                 goto out_free;
3372                         }
3373
3374                         /* ignore disabled channels */
3375                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3376                                 continue;
3377
3378                         request->channels[i] = chan;
3379                         i++;
3380                 }
3381         } else {
3382                 /* all channels */
3383                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3384                         int j;
3385                         if (!wiphy->bands[band])
3386                                 continue;
3387                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3388                                 struct ieee80211_channel *chan;
3389
3390                                 chan = &wiphy->bands[band]->channels[j];
3391
3392                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3393                                         continue;
3394
3395                                 request->channels[i] = chan;
3396                                 i++;
3397                         }
3398                 }
3399         }
3400
3401         if (!i) {
3402                 err = -EINVAL;
3403                 goto out_free;
3404         }
3405
3406         request->n_channels = i;
3407
3408         i = 0;
3409         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3410                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3411                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3412                                 err = -EINVAL;
3413                                 goto out_free;
3414                         }
3415                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3416                         request->ssids[i].ssid_len = nla_len(attr);
3417                         i++;
3418                 }
3419         }
3420
3421         if (info->attrs[NL80211_ATTR_IE]) {
3422                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3423                 memcpy((void *)request->ie,
3424                        nla_data(info->attrs[NL80211_ATTR_IE]),
3425                        request->ie_len);
3426         }
3427
3428         request->dev = dev;
3429         request->wiphy = &rdev->wiphy;
3430
3431         rdev->scan_req = request;
3432         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3433
3434         if (!err) {
3435                 nl80211_send_scan_start(rdev, dev);
3436                 dev_hold(dev);
3437         } else {
3438  out_free:
3439                 rdev->scan_req = NULL;
3440                 kfree(request);
3441         }
3442
3443         return err;
3444 }
3445
3446 static int nl80211_start_sched_scan(struct sk_buff *skb,
3447                                     struct genl_info *info)
3448 {
3449         struct cfg80211_sched_scan_request *request;
3450         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3451         struct net_device *dev = info->user_ptr[1];
3452         struct cfg80211_ssid *ssid;
3453         struct ieee80211_channel *channel;
3454         struct nlattr *attr;
3455         struct wiphy *wiphy;
3456         int err, tmp, n_ssids = 0, n_channels, i;
3457         u32 interval;
3458         enum ieee80211_band band;
3459         size_t ie_len;
3460
3461         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3462             !rdev->ops->sched_scan_start)
3463                 return -EOPNOTSUPP;
3464
3465         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3466                 return -EINVAL;
3467
3468         if (rdev->sched_scan_req)
3469                 return -EINPROGRESS;
3470
3471         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3472                 return -EINVAL;
3473
3474         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3475         if (interval == 0)
3476                 return -EINVAL;
3477
3478         wiphy = &rdev->wiphy;
3479
3480         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3481                 n_channels = validate_scan_freqs(
3482                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3483                 if (!n_channels)
3484                         return -EINVAL;
3485         } else {
3486                 n_channels = 0;
3487
3488                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3489                         if (wiphy->bands[band])
3490                                 n_channels += wiphy->bands[band]->n_channels;
3491         }
3492
3493         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3494                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3495                                     tmp)
3496                         n_ssids++;
3497
3498         if (n_ssids > wiphy->max_scan_ssids)
3499                 return -EINVAL;
3500
3501         if (info->attrs[NL80211_ATTR_IE])
3502                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3503         else
3504                 ie_len = 0;
3505
3506         if (ie_len > wiphy->max_scan_ie_len)
3507                 return -EINVAL;
3508
3509         request = kzalloc(sizeof(*request)
3510                         + sizeof(*ssid) * n_ssids
3511                         + sizeof(channel) * n_channels
3512                         + ie_len, GFP_KERNEL);
3513         if (!request)
3514                 return -ENOMEM;
3515
3516         if (n_ssids)
3517                 request->ssids = (void *)&request->channels[n_channels];
3518         request->n_ssids = n_ssids;
3519         if (ie_len) {
3520                 if (request->ssids)
3521                         request->ie = (void *)(request->ssids + n_ssids);
3522                 else
3523                         request->ie = (void *)(request->channels + n_channels);
3524         }
3525
3526         i = 0;
3527         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3528                 /* user specified, bail out if channel not found */
3529                 nla_for_each_nested(attr,
3530                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3531                                     tmp) {
3532                         struct ieee80211_channel *chan;
3533
3534                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3535
3536                         if (!chan) {
3537                                 err = -EINVAL;
3538                                 goto out_free;
3539                         }
3540
3541                         /* ignore disabled channels */
3542                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3543                                 continue;
3544
3545                         request->channels[i] = chan;
3546                         i++;
3547                 }
3548         } else {
3549                 /* all channels */
3550                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3551                         int j;
3552                         if (!wiphy->bands[band])
3553                                 continue;
3554                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3555                                 struct ieee80211_channel *chan;
3556
3557                                 chan = &wiphy->bands[band]->channels[j];
3558
3559                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3560                                         continue;
3561
3562                                 request->channels[i] = chan;
3563                                 i++;
3564                         }
3565                 }
3566         }
3567
3568         if (!i) {
3569                 err = -EINVAL;
3570                 goto out_free;
3571         }
3572
3573         request->n_channels = i;
3574
3575         i = 0;
3576         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3577                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3578                                     tmp) {
3579                         if (request->ssids[i].ssid_len >
3580                             IEEE80211_MAX_SSID_LEN) {
3581                                 err = -EINVAL;
3582                                 goto out_free;
3583                         }
3584                         memcpy(request->ssids[i].ssid, nla_data(attr),
3585                                nla_len(attr));
3586                         request->ssids[i].ssid_len = nla_len(attr);
3587                         i++;
3588                 }
3589         }
3590
3591         if (info->attrs[NL80211_ATTR_IE]) {
3592                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3593                 memcpy((void *)request->ie,
3594                        nla_data(info->attrs[NL80211_ATTR_IE]),
3595                        request->ie_len);
3596         }
3597
3598         request->dev = dev;
3599         request->wiphy = &rdev->wiphy;
3600         request->interval = interval;
3601
3602         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
3603         if (!err) {
3604                 rdev->sched_scan_req = request;
3605                 nl80211_send_sched_scan(rdev, dev,
3606                                         NL80211_CMD_START_SCHED_SCAN);
3607                 goto out;
3608         }
3609
3610 out_free:
3611         kfree(request);
3612 out:
3613         return err;
3614 }
3615
3616 static int nl80211_stop_sched_scan(struct sk_buff *skb,
3617                                    struct genl_info *info)
3618 {
3619         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3620
3621         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3622             !rdev->ops->sched_scan_stop)
3623                 return -EOPNOTSUPP;
3624
3625         return __cfg80211_stop_sched_scan(rdev, false);
3626 }
3627
3628 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3629                             struct cfg80211_registered_device *rdev,
3630                             struct wireless_dev *wdev,
3631                             struct cfg80211_internal_bss *intbss)
3632 {
3633         struct cfg80211_bss *res = &intbss->pub;
3634         void *hdr;
3635         struct nlattr *bss;
3636         int i;
3637
3638         ASSERT_WDEV_LOCK(wdev);
3639
3640         hdr = nl80211hdr_put(msg, pid, seq, flags,
3641                              NL80211_CMD_NEW_SCAN_RESULTS);
3642         if (!hdr)
3643                 return -1;
3644
3645         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3646         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3647
3648         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3649         if (!bss)
3650                 goto nla_put_failure;
3651         if (!is_zero_ether_addr(res->bssid))
3652                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3653         if (res->information_elements && res->len_information_elements)
3654                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3655                         res->len_information_elements,
3656                         res->information_elements);
3657         if (res->beacon_ies && res->len_beacon_ies &&
3658             res->beacon_ies != res->information_elements)
3659                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3660                         res->len_beacon_ies, res->beacon_ies);
3661         if (res->tsf)
3662                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3663         if (res->beacon_interval)
3664                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3665         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3666         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3667         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3668                 jiffies_to_msecs(jiffies - intbss->ts));
3669
3670         switch (rdev->wiphy.signal_type) {
3671         case CFG80211_SIGNAL_TYPE_MBM:
3672                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3673                 break;
3674         case CFG80211_SIGNAL_TYPE_UNSPEC:
3675                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3676                 break;
3677         default:
3678                 break;
3679         }
3680
3681         switch (wdev->iftype) {
3682         case NL80211_IFTYPE_P2P_CLIENT:
3683         case NL80211_IFTYPE_STATION:
3684                 if (intbss == wdev->current_bss)
3685                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3686                                     NL80211_BSS_STATUS_ASSOCIATED);
3687                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3688                         if (intbss != wdev->auth_bsses[i])
3689                                 continue;
3690                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3691                                     NL80211_BSS_STATUS_AUTHENTICATED);
3692                         break;
3693                 }
3694                 break;
3695         case NL80211_IFTYPE_ADHOC:
3696                 if (intbss == wdev->current_bss)
3697                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3698                                     NL80211_BSS_STATUS_IBSS_JOINED);
3699                 break;
3700         default:
3701                 break;
3702         }
3703
3704         nla_nest_end(msg, bss);
3705
3706         return genlmsg_end(msg, hdr);
3707
3708  nla_put_failure:
3709         genlmsg_cancel(msg, hdr);
3710         return -EMSGSIZE;
3711 }
3712
3713 static int nl80211_dump_scan(struct sk_buff *skb,
3714                              struct netlink_callback *cb)
3715 {
3716         struct cfg80211_registered_device *rdev;
3717         struct net_device *dev;
3718         struct cfg80211_internal_bss *scan;
3719         struct wireless_dev *wdev;
3720         int start = cb->args[1], idx = 0;
3721         int err;
3722
3723         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3724         if (err)
3725                 return err;
3726
3727         wdev = dev->ieee80211_ptr;
3728
3729         wdev_lock(wdev);
3730         spin_lock_bh(&rdev->bss_lock);
3731         cfg80211_bss_expire(rdev);
3732
3733         list_for_each_entry(scan, &rdev->bss_list, list) {
3734                 if (++idx <= start)
3735                         continue;
3736                 if (nl80211_send_bss(skb,
3737                                 NETLINK_CB(cb->skb).pid,
3738                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3739                                 rdev, wdev, scan) < 0) {
3740                         idx--;
3741                         break;
3742                 }
3743         }
3744
3745         spin_unlock_bh(&rdev->bss_lock);
3746         wdev_unlock(wdev);
3747
3748         cb->args[1] = idx;
3749         nl80211_finish_netdev_dump(rdev);
3750
3751         return skb->len;
3752 }
3753
3754 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3755                                 int flags, struct net_device *dev,
3756                                 struct survey_info *survey)
3757 {
3758         void *hdr;
3759         struct nlattr *infoattr;
3760
3761         /* Survey without a channel doesn't make sense */
3762         if (!survey->channel)
3763                 return -EINVAL;
3764
3765         hdr = nl80211hdr_put(msg, pid, seq, flags,
3766                              NL80211_CMD_NEW_SURVEY_RESULTS);
3767         if (!hdr)
3768                 return -ENOMEM;
3769
3770         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3771
3772         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3773         if (!infoattr)
3774                 goto nla_put_failure;
3775
3776         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3777                     survey->channel->center_freq);
3778         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3779                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3780                             survey->noise);
3781         if (survey->filled & SURVEY_INFO_IN_USE)
3782                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3783         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3784                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3785                             survey->channel_time);
3786         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3787                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3788                             survey->channel_time_busy);
3789         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3790                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3791                             survey->channel_time_ext_busy);
3792         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3793                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3794                             survey->channel_time_rx);
3795         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3796                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3797                             survey->channel_time_tx);
3798
3799         nla_nest_end(msg, infoattr);
3800
3801         return genlmsg_end(msg, hdr);
3802
3803  nla_put_failure:
3804         genlmsg_cancel(msg, hdr);
3805         return -EMSGSIZE;
3806 }
3807
3808 static int nl80211_dump_survey(struct sk_buff *skb,
3809                         struct netlink_callback *cb)
3810 {
3811         struct survey_info survey;
3812         struct cfg80211_registered_device *dev;
3813         struct net_device *netdev;
3814         int survey_idx = cb->args[1];
3815         int res;
3816
3817         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3818         if (res)
3819                 return res;
3820
3821         if (!dev->ops->dump_survey) {
3822                 res = -EOPNOTSUPP;
3823                 goto out_err;
3824         }
3825
3826         while (1) {
3827                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3828                                             &survey);
3829                 if (res == -ENOENT)
3830                         break;
3831                 if (res)
3832                         goto out_err;
3833
3834                 if (nl80211_send_survey(skb,
3835                                 NETLINK_CB(cb->skb).pid,
3836                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3837                                 netdev,
3838                                 &survey) < 0)
3839                         goto out;
3840                 survey_idx++;
3841         }
3842
3843  out:
3844         cb->args[1] = survey_idx;
3845         res = skb->len;
3846  out_err:
3847         nl80211_finish_netdev_dump(dev);
3848         return res;
3849 }
3850
3851 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3852 {
3853         return auth_type <= NL80211_AUTHTYPE_MAX;
3854 }
3855
3856 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3857 {
3858         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3859                                   NL80211_WPA_VERSION_2));
3860 }
3861
3862 static bool nl80211_valid_akm_suite(u32 akm)
3863 {
3864         return akm == WLAN_AKM_SUITE_8021X ||
3865                 akm == WLAN_AKM_SUITE_PSK;
3866 }
3867
3868 static bool nl80211_valid_cipher_suite(u32 cipher)
3869 {
3870         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3871                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3872                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3873                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3874                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3875 }
3876
3877
3878 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3879 {
3880         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3881         struct net_device *dev = info->user_ptr[1];
3882         struct ieee80211_channel *chan;
3883         const u8 *bssid, *ssid, *ie = NULL;
3884         int err, ssid_len, ie_len = 0;
3885         enum nl80211_auth_type auth_type;
3886         struct key_parse key;
3887         bool local_state_change;
3888
3889         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3890                 return -EINVAL;
3891
3892         if (!info->attrs[NL80211_ATTR_MAC])
3893                 return -EINVAL;
3894
3895         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3896                 return -EINVAL;
3897
3898         if (!info->attrs[NL80211_ATTR_SSID])
3899                 return -EINVAL;
3900
3901         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3902                 return -EINVAL;
3903
3904         err = nl80211_parse_key(info, &key);
3905         if (err)
3906                 return err;
3907
3908         if (key.idx >= 0) {
3909                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3910                         return -EINVAL;
3911                 if (!key.p.key || !key.p.key_len)
3912                         return -EINVAL;
3913                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3914                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3915                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3916                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3917                         return -EINVAL;
3918                 if (key.idx > 4)
3919                         return -EINVAL;
3920         } else {
3921                 key.p.key_len = 0;
3922                 key.p.key = NULL;
3923         }
3924
3925         if (key.idx >= 0) {
3926                 int i;
3927                 bool ok = false;
3928                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3929                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3930                                 ok = true;
3931                                 break;
3932                         }
3933                 }
3934                 if (!ok)
3935                         return -EINVAL;
3936         }
3937
3938         if (!rdev->ops->auth)
3939                 return -EOPNOTSUPP;
3940
3941         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3942             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3943                 return -EOPNOTSUPP;
3944
3945         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3946         chan = ieee80211_get_channel(&rdev->wiphy,
3947                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3948         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3949                 return -EINVAL;
3950
3951         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3952         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3953
3954         if (info->attrs[NL80211_ATTR_IE]) {
3955                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3956                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3957         }
3958
3959         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3960         if (!nl80211_valid_auth_type(auth_type))
3961                 return -EINVAL;
3962
3963         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3964
3965         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3966                                   ssid, ssid_len, ie, ie_len,
3967                                   key.p.key, key.p.key_len, key.idx,
3968                                   local_state_change);
3969 }
3970
3971 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3972                                    struct genl_info *info,
3973                                    struct cfg80211_crypto_settings *settings,
3974                                    int cipher_limit)
3975 {
3976         memset(settings, 0, sizeof(*settings));
3977
3978         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3979
3980         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3981                 u16 proto;
3982                 proto = nla_get_u16(
3983                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3984                 settings->control_port_ethertype = cpu_to_be16(proto);
3985                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3986                     proto != ETH_P_PAE)
3987                         return -EINVAL;
3988                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3989                         settings->control_port_no_encrypt = true;
3990         } else
3991                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3992
3993         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3994                 void *data;
3995                 int len, i;
3996
3997                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3998                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3999                 settings->n_ciphers_pairwise = len / sizeof(u32);
4000
4001                 if (len % sizeof(u32))
4002                         return -EINVAL;
4003
4004                 if (settings->n_ciphers_pairwise > cipher_limit)
4005                         return -EINVAL;
4006
4007                 memcpy(settings->ciphers_pairwise, data, len);
4008
4009                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4010                         if (!nl80211_valid_cipher_suite(
4011                                         settings->ciphers_pairwise[i]))
4012                                 return -EINVAL;
4013         }
4014
4015         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4016                 settings->cipher_group =
4017                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4018                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
4019                         return -EINVAL;
4020         }
4021
4022         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4023                 settings->wpa_versions =
4024                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4025                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4026                         return -EINVAL;
4027         }
4028
4029         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4030                 void *data;
4031                 int len, i;
4032
4033                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4034                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4035                 settings->n_akm_suites = len / sizeof(u32);
4036
4037                 if (len % sizeof(u32))
4038                         return -EINVAL;
4039
4040                 memcpy(settings->akm_suites, data, len);
4041
4042                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4043                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
4044                                 return -EINVAL;
4045         }
4046
4047         return 0;
4048 }
4049
4050 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4051 {
4052         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4053         struct net_device *dev = info->user_ptr[1];
4054         struct cfg80211_crypto_settings crypto;
4055         struct ieee80211_channel *chan;
4056         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4057         int err, ssid_len, ie_len = 0;
4058         bool use_mfp = false;
4059
4060         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4061                 return -EINVAL;
4062
4063         if (!info->attrs[NL80211_ATTR_MAC] ||
4064             !info->attrs[NL80211_ATTR_SSID] ||
4065             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4066                 return -EINVAL;
4067
4068         if (!rdev->ops->assoc)
4069                 return -EOPNOTSUPP;
4070
4071         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4072             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4073                 return -EOPNOTSUPP;
4074
4075         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4076
4077         chan = ieee80211_get_channel(&rdev->wiphy,
4078                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4079         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4080                 return -EINVAL;
4081
4082         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4083         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4084
4085         if (info->attrs[NL80211_ATTR_IE]) {
4086                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4087                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4088         }
4089
4090         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4091                 enum nl80211_mfp mfp =
4092                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4093                 if (mfp == NL80211_MFP_REQUIRED)
4094                         use_mfp = true;
4095                 else if (mfp != NL80211_MFP_NO)
4096                         return -EINVAL;
4097         }
4098
4099         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4100                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4101
4102         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4103         if (!err)
4104                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4105                                           ssid, ssid_len, ie, ie_len, use_mfp,
4106                                           &crypto);
4107
4108         return err;
4109 }
4110
4111 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4112 {
4113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4114         struct net_device *dev = info->user_ptr[1];
4115         const u8 *ie = NULL, *bssid;
4116         int ie_len = 0;
4117         u16 reason_code;
4118         bool local_state_change;
4119
4120         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4121                 return -EINVAL;
4122
4123         if (!info->attrs[NL80211_ATTR_MAC])
4124                 return -EINVAL;
4125
4126         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4127                 return -EINVAL;
4128
4129         if (!rdev->ops->deauth)
4130                 return -EOPNOTSUPP;
4131
4132         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4133             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4134                 return -EOPNOTSUPP;
4135
4136         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4137
4138         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4139         if (reason_code == 0) {
4140                 /* Reason Code 0 is reserved */
4141                 return -EINVAL;
4142         }
4143
4144         if (info->attrs[NL80211_ATTR_IE]) {
4145                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4146                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4147         }
4148
4149         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4150
4151         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4152                                     local_state_change);
4153 }
4154
4155 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4156 {
4157         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4158         struct net_device *dev = info->user_ptr[1];
4159         const u8 *ie = NULL, *bssid;
4160         int ie_len = 0;
4161         u16 reason_code;
4162         bool local_state_change;
4163
4164         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4165                 return -EINVAL;
4166
4167         if (!info->attrs[NL80211_ATTR_MAC])
4168                 return -EINVAL;
4169
4170         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4171                 return -EINVAL;
4172
4173         if (!rdev->ops->disassoc)
4174                 return -EOPNOTSUPP;
4175
4176         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4177             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4178                 return -EOPNOTSUPP;
4179
4180         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4181
4182         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4183         if (reason_code == 0) {
4184                 /* Reason Code 0 is reserved */
4185                 return -EINVAL;
4186         }
4187
4188         if (info->attrs[NL80211_ATTR_IE]) {
4189                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4190                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4191         }
4192
4193         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4194
4195         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4196                                       local_state_change);
4197 }
4198
4199 static bool
4200 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4201                          int mcast_rate[IEEE80211_NUM_BANDS],
4202                          int rateval)
4203 {
4204         struct wiphy *wiphy = &rdev->wiphy;
4205         bool found = false;
4206         int band, i;
4207
4208         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4209                 struct ieee80211_supported_band *sband;
4210
4211                 sband = wiphy->bands[band];
4212                 if (!sband)
4213                         continue;
4214
4215                 for (i = 0; i < sband->n_bitrates; i++) {
4216                         if (sband->bitrates[i].bitrate == rateval) {
4217                                 mcast_rate[band] = i + 1;
4218                                 found = true;
4219                                 break;
4220                         }
4221                 }
4222         }
4223
4224         return found;
4225 }
4226
4227 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4228 {
4229         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4230         struct net_device *dev = info->user_ptr[1];
4231         struct cfg80211_ibss_params ibss;
4232         struct wiphy *wiphy;
4233         struct cfg80211_cached_keys *connkeys = NULL;
4234         int err;
4235
4236         memset(&ibss, 0, sizeof(ibss));
4237
4238         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4239                 return -EINVAL;
4240
4241         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4242             !info->attrs[NL80211_ATTR_SSID] ||
4243             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4244                 return -EINVAL;
4245
4246         ibss.beacon_interval = 100;
4247
4248         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4249                 ibss.beacon_interval =
4250                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4251                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4252                         return -EINVAL;
4253         }
4254
4255         if (!rdev->ops->join_ibss)
4256                 return -EOPNOTSUPP;
4257
4258         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4259                 return -EOPNOTSUPP;
4260
4261         wiphy = &rdev->wiphy;
4262
4263         if (info->attrs[NL80211_ATTR_MAC])
4264                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4265         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4266         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4267
4268         if (info->attrs[NL80211_ATTR_IE]) {
4269                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4270                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4271         }
4272
4273         ibss.channel = ieee80211_get_channel(wiphy,
4274                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4275         if (!ibss.channel ||
4276             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4277             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4278                 return -EINVAL;
4279
4280         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4281         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4282
4283         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4284                 u8 *rates =
4285                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4286                 int n_rates =
4287                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4288                 struct ieee80211_supported_band *sband =
4289                         wiphy->bands[ibss.channel->band];
4290                 int i, j;
4291
4292                 if (n_rates == 0)
4293                         return -EINVAL;
4294
4295                 for (i = 0; i < n_rates; i++) {
4296                         int rate = (rates[i] & 0x7f) * 5;
4297                         bool found = false;
4298
4299                         for (j = 0; j < sband->n_bitrates; j++) {
4300                                 if (sband->bitrates[j].bitrate == rate) {
4301                                         found = true;
4302                                         ibss.basic_rates |= BIT(j);
4303                                         break;
4304                                 }
4305                         }
4306                         if (!found)
4307                                 return -EINVAL;
4308                 }
4309         }
4310
4311         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4312             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4313                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4314                 return -EINVAL;
4315
4316         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4317                 connkeys = nl80211_parse_connkeys(rdev,
4318                                         info->attrs[NL80211_ATTR_KEYS]);
4319                 if (IS_ERR(connkeys))
4320                         return PTR_ERR(connkeys);
4321         }
4322
4323         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4324         if (err)
4325                 kfree(connkeys);
4326         return err;
4327 }
4328
4329 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4330 {
4331         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4332         struct net_device *dev = info->user_ptr[1];
4333
4334         if (!rdev->ops->leave_ibss)
4335                 return -EOPNOTSUPP;
4336
4337         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4338                 return -EOPNOTSUPP;
4339
4340         return cfg80211_leave_ibss(rdev, dev, false);
4341 }
4342
4343 #ifdef CONFIG_NL80211_TESTMODE
4344 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4345         .name = "testmode",
4346 };
4347
4348 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4349 {
4350         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4351         int err;
4352
4353         if (!info->attrs[NL80211_ATTR_TESTDATA])
4354                 return -EINVAL;
4355
4356         err = -EOPNOTSUPP;
4357         if (rdev->ops->testmode_cmd) {
4358                 rdev->testmode_info = info;
4359                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4360                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4361                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4362                 rdev->testmode_info = NULL;
4363         }
4364
4365         return err;
4366 }
4367
4368 static struct sk_buff *
4369 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4370                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4371 {
4372         struct sk_buff *skb;
4373         void *hdr;
4374         struct nlattr *data;
4375
4376         skb = nlmsg_new(approxlen + 100, gfp);
4377         if (!skb)
4378                 return NULL;
4379
4380         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4381         if (!hdr) {
4382                 kfree_skb(skb);
4383                 return NULL;
4384         }
4385
4386         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4387         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4388
4389         ((void **)skb->cb)[0] = rdev;
4390         ((void **)skb->cb)[1] = hdr;
4391         ((void **)skb->cb)[2] = data;
4392
4393         return skb;
4394
4395  nla_put_failure:
4396         kfree_skb(skb);
4397         return NULL;
4398 }
4399
4400 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4401                                                   int approxlen)
4402 {
4403         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4404
4405         if (WARN_ON(!rdev->testmode_info))
4406                 return NULL;
4407
4408         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4409                                 rdev->testmode_info->snd_pid,
4410                                 rdev->testmode_info->snd_seq,
4411                                 GFP_KERNEL);
4412 }
4413 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4414
4415 int cfg80211_testmode_reply(struct sk_buff *skb)
4416 {
4417         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4418         void *hdr = ((void **)skb->cb)[1];
4419         struct nlattr *data = ((void **)skb->cb)[2];
4420
4421         if (WARN_ON(!rdev->testmode_info)) {
4422                 kfree_skb(skb);
4423                 return -EINVAL;
4424         }
4425
4426         nla_nest_end(skb, data);
4427         genlmsg_end(skb, hdr);
4428         return genlmsg_reply(skb, rdev->testmode_info);
4429 }
4430 EXPORT_SYMBOL(cfg80211_testmode_reply);
4431
4432 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4433                                                   int approxlen, gfp_t gfp)
4434 {
4435         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4436
4437         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4438 }
4439 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4440
4441 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4442 {
4443         void *hdr = ((void **)skb->cb)[1];
4444         struct nlattr *data = ((void **)skb->cb)[2];
4445
4446         nla_nest_end(skb, data);
4447         genlmsg_end(skb, hdr);
4448         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4449 }
4450 EXPORT_SYMBOL(cfg80211_testmode_event);
4451 #endif
4452
4453 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4454 {
4455         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4456         struct net_device *dev = info->user_ptr[1];
4457         struct cfg80211_connect_params connect;
4458         struct wiphy *wiphy;
4459         struct cfg80211_cached_keys *connkeys = NULL;
4460         int err;
4461
4462         memset(&connect, 0, sizeof(connect));
4463
4464         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4465                 return -EINVAL;
4466
4467         if (!info->attrs[NL80211_ATTR_SSID] ||
4468             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4469                 return -EINVAL;
4470
4471         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4472                 connect.auth_type =
4473                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4474                 if (!nl80211_valid_auth_type(connect.auth_type))
4475                         return -EINVAL;
4476         } else
4477                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4478
4479         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4480
4481         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4482                                       NL80211_MAX_NR_CIPHER_SUITES);
4483         if (err)
4484                 return err;
4485
4486         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4487             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4488                 return -EOPNOTSUPP;
4489
4490         wiphy = &rdev->wiphy;
4491
4492         if (info->attrs[NL80211_ATTR_MAC])
4493                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4494         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4495         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4496
4497         if (info->attrs[NL80211_ATTR_IE]) {
4498                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4499                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4500         }
4501
4502         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4503                 connect.channel =
4504                         ieee80211_get_channel(wiphy,
4505                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4506                 if (!connect.channel ||
4507                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4508                         return -EINVAL;
4509         }
4510
4511         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4512                 connkeys = nl80211_parse_connkeys(rdev,
4513                                         info->attrs[NL80211_ATTR_KEYS]);
4514                 if (IS_ERR(connkeys))
4515                         return PTR_ERR(connkeys);
4516         }
4517
4518         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4519         if (err)
4520                 kfree(connkeys);
4521         return err;
4522 }
4523
4524 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4525 {
4526         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4527         struct net_device *dev = info->user_ptr[1];
4528         u16 reason;
4529
4530         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4531                 reason = WLAN_REASON_DEAUTH_LEAVING;
4532         else
4533                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4534
4535         if (reason == 0)
4536                 return -EINVAL;
4537
4538         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4539             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4540                 return -EOPNOTSUPP;
4541
4542         return cfg80211_disconnect(rdev, dev, reason, true);
4543 }
4544
4545 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4546 {
4547         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4548         struct net *net;
4549         int err;
4550         u32 pid;
4551
4552         if (!info->attrs[NL80211_ATTR_PID])
4553                 return -EINVAL;
4554
4555         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4556
4557         net = get_net_ns_by_pid(pid);
4558         if (IS_ERR(net))
4559                 return PTR_ERR(net);
4560
4561         err = 0;
4562
4563         /* check if anything to do */
4564         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4565                 err = cfg80211_switch_netns(rdev, net);
4566
4567         put_net(net);
4568         return err;
4569 }
4570
4571 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4572 {
4573         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4574         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4575                         struct cfg80211_pmksa *pmksa) = NULL;
4576         struct net_device *dev = info->user_ptr[1];
4577         struct cfg80211_pmksa pmksa;
4578
4579         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4580
4581         if (!info->attrs[NL80211_ATTR_MAC])
4582                 return -EINVAL;
4583
4584         if (!info->attrs[NL80211_ATTR_PMKID])
4585                 return -EINVAL;
4586
4587         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4588         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4589
4590         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4591             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4592                 return -EOPNOTSUPP;
4593
4594         switch (info->genlhdr->cmd) {
4595         case NL80211_CMD_SET_PMKSA:
4596                 rdev_ops = rdev->ops->set_pmksa;
4597                 break;
4598         case NL80211_CMD_DEL_PMKSA:
4599                 rdev_ops = rdev->ops->del_pmksa;
4600                 break;
4601         default:
4602                 WARN_ON(1);
4603                 break;
4604         }
4605
4606         if (!rdev_ops)
4607                 return -EOPNOTSUPP;
4608
4609         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4610 }
4611
4612 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4613 {
4614         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4615         struct net_device *dev = info->user_ptr[1];
4616
4617         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4618             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4619                 return -EOPNOTSUPP;
4620
4621         if (!rdev->ops->flush_pmksa)
4622                 return -EOPNOTSUPP;
4623
4624         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4625 }
4626
4627 static int nl80211_remain_on_channel(struct sk_buff *skb,
4628                                      struct genl_info *info)
4629 {
4630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4631         struct net_device *dev = info->user_ptr[1];
4632         struct ieee80211_channel *chan;
4633         struct sk_buff *msg;
4634         void *hdr;
4635         u64 cookie;
4636         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4637         u32 freq, duration;
4638         int err;
4639
4640         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4641             !info->attrs[NL80211_ATTR_DURATION])
4642                 return -EINVAL;
4643
4644         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4645
4646         /*
4647          * We should be on that channel for at least one jiffie,
4648          * and more than 5 seconds seems excessive.
4649          */
4650         if (!duration || !msecs_to_jiffies(duration) ||
4651             duration > rdev->wiphy.max_remain_on_channel_duration)
4652                 return -EINVAL;
4653
4654         if (!rdev->ops->remain_on_channel)
4655                 return -EOPNOTSUPP;
4656
4657         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4658                 channel_type = nla_get_u32(
4659                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4660                 if (channel_type != NL80211_CHAN_NO_HT &&
4661                     channel_type != NL80211_CHAN_HT20 &&
4662                     channel_type != NL80211_CHAN_HT40PLUS &&
4663                     channel_type != NL80211_CHAN_HT40MINUS)
4664                         return -EINVAL;
4665         }
4666
4667         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4668         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4669         if (chan == NULL)
4670                 return -EINVAL;
4671
4672         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4673         if (!msg)
4674                 return -ENOMEM;
4675
4676         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4677                              NL80211_CMD_REMAIN_ON_CHANNEL);
4678
4679         if (IS_ERR(hdr)) {
4680                 err = PTR_ERR(hdr);
4681                 goto free_msg;
4682         }
4683
4684         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4685                                            channel_type, duration, &cookie);
4686
4687         if (err)
4688                 goto free_msg;
4689
4690         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4691
4692         genlmsg_end(msg, hdr);
4693
4694         return genlmsg_reply(msg, info);
4695
4696  nla_put_failure:
4697         err = -ENOBUFS;
4698  free_msg:
4699         nlmsg_free(msg);
4700         return err;
4701 }
4702
4703 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4704                                             struct genl_info *info)
4705 {
4706         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4707         struct net_device *dev = info->user_ptr[1];
4708         u64 cookie;
4709
4710         if (!info->attrs[NL80211_ATTR_COOKIE])
4711                 return -EINVAL;
4712
4713         if (!rdev->ops->cancel_remain_on_channel)
4714                 return -EOPNOTSUPP;
4715
4716         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4717
4718         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4719 }
4720
4721 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4722                            u8 *rates, u8 rates_len)
4723 {
4724         u8 i;
4725         u32 mask = 0;
4726
4727         for (i = 0; i < rates_len; i++) {
4728                 int rate = (rates[i] & 0x7f) * 5;
4729                 int ridx;
4730                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4731                         struct ieee80211_rate *srate =
4732                                 &sband->bitrates[ridx];
4733                         if (rate == srate->bitrate) {
4734                                 mask |= 1 << ridx;
4735                                 break;
4736                         }
4737                 }
4738                 if (ridx == sband->n_bitrates)
4739                         return 0; /* rate not found */
4740         }
4741
4742         return mask;
4743 }
4744
4745 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4746         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4747                                     .len = NL80211_MAX_SUPP_RATES },
4748 };
4749
4750 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4751                                        struct genl_info *info)
4752 {
4753         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4754         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4755         struct cfg80211_bitrate_mask mask;
4756         int rem, i;
4757         struct net_device *dev = info->user_ptr[1];
4758         struct nlattr *tx_rates;
4759         struct ieee80211_supported_band *sband;
4760
4761         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4762                 return -EINVAL;
4763
4764         if (!rdev->ops->set_bitrate_mask)
4765                 return -EOPNOTSUPP;
4766
4767         memset(&mask, 0, sizeof(mask));
4768         /* Default to all rates enabled */
4769         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4770                 sband = rdev->wiphy.bands[i];
4771                 mask.control[i].legacy =
4772                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4773         }
4774
4775         /*
4776          * The nested attribute uses enum nl80211_band as the index. This maps
4777          * directly to the enum ieee80211_band values used in cfg80211.
4778          */
4779         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4780         {
4781                 enum ieee80211_band band = nla_type(tx_rates);
4782                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4783                         return -EINVAL;
4784                 sband = rdev->wiphy.bands[band];
4785                 if (sband == NULL)
4786                         return -EINVAL;
4787                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4788                           nla_len(tx_rates), nl80211_txattr_policy);
4789                 if (tb[NL80211_TXRATE_LEGACY]) {
4790                         mask.control[band].legacy = rateset_to_mask(
4791                                 sband,
4792                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4793                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4794                         if (mask.control[band].legacy == 0)
4795                                 return -EINVAL;
4796                 }
4797         }
4798
4799         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4800 }
4801
4802 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4803 {
4804         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4805         struct net_device *dev = info->user_ptr[1];
4806         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4807
4808         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4809                 return -EINVAL;
4810
4811         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4812                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4813
4814         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4815             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4816             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4817             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4818             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4819             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4820             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4821                 return -EOPNOTSUPP;
4822
4823         /* not much point in registering if we can't reply */
4824         if (!rdev->ops->mgmt_tx)
4825                 return -EOPNOTSUPP;
4826
4827         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4828                         frame_type,
4829                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4830                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4831 }
4832
4833 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4834 {
4835         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4836         struct net_device *dev = info->user_ptr[1];
4837         struct ieee80211_channel *chan;
4838         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4839         bool channel_type_valid = false;
4840         u32 freq;
4841         int err;
4842         void *hdr;
4843         u64 cookie;
4844         struct sk_buff *msg;
4845         unsigned int wait = 0;
4846         bool offchan;
4847
4848         if (!info->attrs[NL80211_ATTR_FRAME] ||
4849             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4850                 return -EINVAL;
4851
4852         if (!rdev->ops->mgmt_tx)
4853                 return -EOPNOTSUPP;
4854
4855         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4856             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4857             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4858             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4859             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4860             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4861             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4862                 return -EOPNOTSUPP;
4863
4864         if (info->attrs[NL80211_ATTR_DURATION]) {
4865                 if (!rdev->ops->mgmt_tx_cancel_wait)
4866                         return -EINVAL;
4867                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4868         }
4869
4870         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4871                 channel_type = nla_get_u32(
4872                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4873                 if (channel_type != NL80211_CHAN_NO_HT &&
4874                     channel_type != NL80211_CHAN_HT20 &&
4875                     channel_type != NL80211_CHAN_HT40PLUS &&
4876                     channel_type != NL80211_CHAN_HT40MINUS)
4877                         return -EINVAL;
4878                 channel_type_valid = true;
4879         }
4880
4881         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4882
4883         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4884         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4885         if (chan == NULL)
4886                 return -EINVAL;
4887
4888         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4889         if (!msg)
4890                 return -ENOMEM;
4891
4892         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4893                              NL80211_CMD_FRAME);
4894
4895         if (IS_ERR(hdr)) {
4896                 err = PTR_ERR(hdr);
4897                 goto free_msg;
4898         }
4899         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4900                                     channel_type_valid, wait,
4901                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4902                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4903                                     &cookie);
4904         if (err)
4905                 goto free_msg;
4906
4907         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4908
4909         genlmsg_end(msg, hdr);
4910         return genlmsg_reply(msg, info);
4911
4912  nla_put_failure:
4913         err = -ENOBUFS;
4914  free_msg:
4915         nlmsg_free(msg);
4916         return err;
4917 }
4918
4919 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4920 {
4921         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4922         struct net_device *dev = info->user_ptr[1];
4923         u64 cookie;
4924
4925         if (!info->attrs[NL80211_ATTR_COOKIE])
4926                 return -EINVAL;
4927
4928         if (!rdev->ops->mgmt_tx_cancel_wait)
4929                 return -EOPNOTSUPP;
4930
4931         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4932             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4933             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4934             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4935             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4936             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4937                 return -EOPNOTSUPP;
4938
4939         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4940
4941         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4942 }
4943
4944 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4945 {
4946         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4947         struct wireless_dev *wdev;
4948         struct net_device *dev = info->user_ptr[1];
4949         u8 ps_state;
4950         bool state;
4951         int err;
4952
4953         if (!info->attrs[NL80211_ATTR_PS_STATE])
4954                 return -EINVAL;
4955
4956         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4957
4958         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4959                 return -EINVAL;
4960
4961         wdev = dev->ieee80211_ptr;
4962
4963         if (!rdev->ops->set_power_mgmt)
4964                 return -EOPNOTSUPP;
4965
4966         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4967
4968         if (state == wdev->ps)
4969                 return 0;
4970
4971         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4972                                         wdev->ps_timeout);
4973         if (!err)
4974                 wdev->ps = state;
4975         return err;
4976 }
4977
4978 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4979 {
4980         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4981         enum nl80211_ps_state ps_state;
4982         struct wireless_dev *wdev;
4983         struct net_device *dev = info->user_ptr[1];
4984         struct sk_buff *msg;
4985         void *hdr;
4986         int err;
4987
4988         wdev = dev->ieee80211_ptr;
4989
4990         if (!rdev->ops->set_power_mgmt)
4991                 return -EOPNOTSUPP;
4992
4993         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4994         if (!msg)
4995                 return -ENOMEM;
4996
4997         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4998                              NL80211_CMD_GET_POWER_SAVE);
4999         if (!hdr) {
5000                 err = -ENOBUFS;
5001                 goto free_msg;
5002         }
5003
5004         if (wdev->ps)
5005                 ps_state = NL80211_PS_ENABLED;
5006         else
5007                 ps_state = NL80211_PS_DISABLED;
5008
5009         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5010
5011         genlmsg_end(msg, hdr);
5012         return genlmsg_reply(msg, info);
5013
5014  nla_put_failure:
5015         err = -ENOBUFS;
5016  free_msg:
5017         nlmsg_free(msg);
5018         return err;
5019 }
5020
5021 static struct nla_policy
5022 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5023         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5024         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5025         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5026 };
5027
5028 static int nl80211_set_cqm_rssi(struct genl_info *info,
5029                                 s32 threshold, u32 hysteresis)
5030 {
5031         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5032         struct wireless_dev *wdev;
5033         struct net_device *dev = info->user_ptr[1];
5034
5035         if (threshold > 0)
5036                 return -EINVAL;
5037
5038         wdev = dev->ieee80211_ptr;
5039
5040         if (!rdev->ops->set_cqm_rssi_config)
5041                 return -EOPNOTSUPP;
5042
5043         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5044             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5045                 return -EOPNOTSUPP;
5046
5047         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5048                                               threshold, hysteresis);
5049 }
5050
5051 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5052 {
5053         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5054         struct nlattr *cqm;
5055         int err;
5056
5057         cqm = info->attrs[NL80211_ATTR_CQM];
5058         if (!cqm) {
5059                 err = -EINVAL;
5060                 goto out;
5061         }
5062
5063         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5064                                nl80211_attr_cqm_policy);
5065         if (err)
5066                 goto out;
5067
5068         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5069             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5070                 s32 threshold;
5071                 u32 hysteresis;
5072                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5073                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5074                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5075         } else
5076                 err = -EINVAL;
5077
5078 out:
5079         return err;
5080 }
5081
5082 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5083 {
5084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5085         struct net_device *dev = info->user_ptr[1];
5086         struct mesh_config cfg;
5087         struct mesh_setup setup;
5088         int err;
5089
5090         /* start with default */
5091         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5092         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5093
5094         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5095                 /* and parse parameters if given */
5096                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5097                 if (err)
5098                         return err;
5099         }
5100
5101         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5102             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5103                 return -EINVAL;
5104
5105         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5106         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5107
5108         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5109                 /* parse additional setup parameters if given */
5110                 err = nl80211_parse_mesh_setup(info, &setup);
5111                 if (err)
5112                         return err;
5113         }
5114
5115         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5116 }
5117
5118 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5119 {
5120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5121         struct net_device *dev = info->user_ptr[1];
5122
5123         return cfg80211_leave_mesh(rdev, dev);
5124 }
5125
5126 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5127 {
5128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5129         struct sk_buff *msg;
5130         void *hdr;
5131
5132         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5133                 return -EOPNOTSUPP;
5134
5135         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5136         if (!msg)
5137                 return -ENOMEM;
5138
5139         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5140                              NL80211_CMD_GET_WOWLAN);
5141         if (!hdr)
5142                 goto nla_put_failure;
5143
5144         if (rdev->wowlan) {
5145                 struct nlattr *nl_wowlan;
5146
5147                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5148                 if (!nl_wowlan)
5149                         goto nla_put_failure;
5150
5151                 if (rdev->wowlan->any)
5152                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5153                 if (rdev->wowlan->disconnect)
5154                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5155                 if (rdev->wowlan->magic_pkt)
5156                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5157                 if (rdev->wowlan->n_patterns) {
5158                         struct nlattr *nl_pats, *nl_pat;
5159                         int i, pat_len;
5160
5161                         nl_pats = nla_nest_start(msg,
5162                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5163                         if (!nl_pats)
5164                                 goto nla_put_failure;
5165
5166                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5167                                 nl_pat = nla_nest_start(msg, i + 1);
5168                                 if (!nl_pat)
5169                                         goto nla_put_failure;
5170                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5171                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5172                                         DIV_ROUND_UP(pat_len, 8),
5173                                         rdev->wowlan->patterns[i].mask);
5174                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5175                                         pat_len,
5176                                         rdev->wowlan->patterns[i].pattern);
5177                                 nla_nest_end(msg, nl_pat);
5178                         }
5179                         nla_nest_end(msg, nl_pats);
5180                 }
5181
5182                 nla_nest_end(msg, nl_wowlan);
5183         }
5184
5185         genlmsg_end(msg, hdr);
5186         return genlmsg_reply(msg, info);
5187
5188 nla_put_failure:
5189         nlmsg_free(msg);
5190         return -ENOBUFS;
5191 }
5192
5193 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5194 {
5195         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5196         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5197         struct cfg80211_wowlan no_triggers = {};
5198         struct cfg80211_wowlan new_triggers = {};
5199         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5200         int err, i;
5201
5202         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5203                 return -EOPNOTSUPP;
5204
5205         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5206                 goto no_triggers;
5207
5208         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5209                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5210                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5211                         nl80211_wowlan_policy);
5212         if (err)
5213                 return err;
5214
5215         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
5216                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
5217                         return -EINVAL;
5218                 new_triggers.any = true;
5219         }
5220
5221         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
5222                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
5223                         return -EINVAL;
5224                 new_triggers.disconnect = true;
5225         }
5226
5227         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
5228                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
5229                         return -EINVAL;
5230                 new_triggers.magic_pkt = true;
5231         }
5232
5233         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
5234                 struct nlattr *pat;
5235                 int n_patterns = 0;
5236                 int rem, pat_len, mask_len;
5237                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
5238
5239                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5240                                     rem)
5241                         n_patterns++;
5242                 if (n_patterns > wowlan->n_patterns)
5243                         return -EINVAL;
5244
5245                 new_triggers.patterns = kcalloc(n_patterns,
5246                                                 sizeof(new_triggers.patterns[0]),
5247                                                 GFP_KERNEL);
5248                 if (!new_triggers.patterns)
5249                         return -ENOMEM;
5250
5251                 new_triggers.n_patterns = n_patterns;
5252                 i = 0;
5253
5254                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5255                                     rem) {
5256                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
5257                                   nla_data(pat), nla_len(pat), NULL);
5258                         err = -EINVAL;
5259                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
5260                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
5261                                 goto error;
5262                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
5263                         mask_len = DIV_ROUND_UP(pat_len, 8);
5264                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
5265                             mask_len)
5266                                 goto error;
5267                         if (pat_len > wowlan->pattern_max_len ||
5268                             pat_len < wowlan->pattern_min_len)
5269                                 goto error;
5270
5271                         new_triggers.patterns[i].mask =
5272                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
5273                         if (!new_triggers.patterns[i].mask) {
5274                                 err = -ENOMEM;
5275                                 goto error;
5276                         }
5277                         new_triggers.patterns[i].pattern =
5278                                 new_triggers.patterns[i].mask + mask_len;
5279                         memcpy(new_triggers.patterns[i].mask,
5280                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
5281                                mask_len);
5282                         new_triggers.patterns[i].pattern_len = pat_len;
5283                         memcpy(new_triggers.patterns[i].pattern,
5284                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
5285                                pat_len);
5286                         i++;
5287                 }
5288         }
5289
5290         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
5291                 struct cfg80211_wowlan *ntrig;
5292                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
5293                                 GFP_KERNEL);
5294                 if (!ntrig) {
5295                         err = -ENOMEM;
5296                         goto error;
5297                 }
5298                 cfg80211_rdev_free_wowlan(rdev);
5299                 rdev->wowlan = ntrig;
5300         } else {
5301  no_triggers:
5302                 cfg80211_rdev_free_wowlan(rdev);
5303                 rdev->wowlan = NULL;
5304         }
5305
5306         return 0;
5307  error:
5308         for (i = 0; i < new_triggers.n_patterns; i++)
5309                 kfree(new_triggers.patterns[i].mask);
5310         kfree(new_triggers.patterns);
5311         return err;
5312 }
5313
5314 #define NL80211_FLAG_NEED_WIPHY         0x01
5315 #define NL80211_FLAG_NEED_NETDEV        0x02
5316 #define NL80211_FLAG_NEED_RTNL          0x04
5317 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
5318 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
5319                                          NL80211_FLAG_CHECK_NETDEV_UP)
5320
5321 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
5322                             struct genl_info *info)
5323 {
5324         struct cfg80211_registered_device *rdev;
5325         struct net_device *dev;
5326         int err;
5327         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
5328
5329         if (rtnl)
5330                 rtnl_lock();
5331
5332         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
5333                 rdev = cfg80211_get_dev_from_info(info);
5334                 if (IS_ERR(rdev)) {
5335                         if (rtnl)
5336                                 rtnl_unlock();
5337                         return PTR_ERR(rdev);
5338                 }
5339                 info->user_ptr[0] = rdev;
5340         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
5341                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5342                 if (err) {
5343                         if (rtnl)
5344                                 rtnl_unlock();
5345                         return err;
5346                 }
5347                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
5348                     !netif_running(dev)) {
5349                         cfg80211_unlock_rdev(rdev);
5350                         dev_put(dev);
5351                         if (rtnl)
5352                                 rtnl_unlock();
5353                         return -ENETDOWN;
5354                 }
5355                 info->user_ptr[0] = rdev;
5356                 info->user_ptr[1] = dev;
5357         }
5358
5359         return 0;
5360 }
5361
5362 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
5363                               struct genl_info *info)
5364 {
5365         if (info->user_ptr[0])
5366                 cfg80211_unlock_rdev(info->user_ptr[0]);
5367         if (info->user_ptr[1])
5368                 dev_put(info->user_ptr[1]);
5369         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
5370                 rtnl_unlock();
5371 }
5372
5373 static struct genl_ops nl80211_ops[] = {
5374         {
5375                 .cmd = NL80211_CMD_GET_WIPHY,
5376                 .doit = nl80211_get_wiphy,
5377                 .dumpit = nl80211_dump_wiphy,
5378                 .policy = nl80211_policy,
5379                 /* can be retrieved by unprivileged users */
5380                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
5381         },
5382         {
5383                 .cmd = NL80211_CMD_SET_WIPHY,
5384                 .doit = nl80211_set_wiphy,
5385                 .policy = nl80211_policy,
5386                 .flags = GENL_ADMIN_PERM,
5387                 .internal_flags = NL80211_FLAG_NEED_RTNL,
5388         },
5389         {
5390                 .cmd = NL80211_CMD_GET_INTERFACE,
5391                 .doit = nl80211_get_interface,
5392                 .dumpit = nl80211_dump_interface,
5393                 .policy = nl80211_policy,
5394                 /* can be retrieved by unprivileged users */
5395                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
5396         },
5397         {
5398                 .cmd = NL80211_CMD_SET_INTERFACE,
5399                 .doit = nl80211_set_interface,
5400                 .policy = nl80211_policy,
5401                 .flags = GENL_ADMIN_PERM,
5402                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5403                                   NL80211_FLAG_NEED_RTNL,
5404         },
5405         {
5406                 .cmd = NL80211_CMD_NEW_INTERFACE,
5407                 .doit = nl80211_new_interface,
5408                 .policy = nl80211_policy,
5409                 .flags = GENL_ADMIN_PERM,
5410                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5411                                   NL80211_FLAG_NEED_RTNL,
5412         },
5413         {
5414                 .cmd = NL80211_CMD_DEL_INTERFACE,
5415                 .doit = nl80211_del_interface,
5416                 .policy = nl80211_policy,
5417                 .flags = GENL_ADMIN_PERM,
5418                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5419                                   NL80211_FLAG_NEED_RTNL,
5420         },
5421         {
5422                 .cmd = NL80211_CMD_GET_KEY,
5423                 .doit = nl80211_get_key,
5424                 .policy = nl80211_policy,
5425                 .flags = GENL_ADMIN_PERM,
5426                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5427                                   NL80211_FLAG_NEED_RTNL,
5428         },
5429         {
5430                 .cmd = NL80211_CMD_SET_KEY,
5431                 .doit = nl80211_set_key,
5432                 .policy = nl80211_policy,
5433                 .flags = GENL_ADMIN_PERM,
5434                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5435                                   NL80211_FLAG_NEED_RTNL,
5436         },
5437         {
5438                 .cmd = NL80211_CMD_NEW_KEY,
5439                 .doit = nl80211_new_key,
5440                 .policy = nl80211_policy,
5441                 .flags = GENL_ADMIN_PERM,
5442                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5443                                   NL80211_FLAG_NEED_RTNL,
5444         },
5445         {
5446                 .cmd = NL80211_CMD_DEL_KEY,
5447                 .doit = nl80211_del_key,
5448                 .policy = nl80211_policy,
5449                 .flags = GENL_ADMIN_PERM,
5450                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5451                                   NL80211_FLAG_NEED_RTNL,
5452         },
5453         {
5454                 .cmd = NL80211_CMD_SET_BEACON,
5455                 .policy = nl80211_policy,
5456                 .flags = GENL_ADMIN_PERM,
5457                 .doit = nl80211_addset_beacon,
5458                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5459                                   NL80211_FLAG_NEED_RTNL,
5460         },
5461         {
5462                 .cmd = NL80211_CMD_NEW_BEACON,
5463                 .policy = nl80211_policy,
5464                 .flags = GENL_ADMIN_PERM,
5465                 .doit = nl80211_addset_beacon,
5466                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5467                                   NL80211_FLAG_NEED_RTNL,
5468         },
5469         {
5470                 .cmd = NL80211_CMD_DEL_BEACON,
5471                 .policy = nl80211_policy,
5472                 .flags = GENL_ADMIN_PERM,
5473                 .doit = nl80211_del_beacon,
5474                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5475                                   NL80211_FLAG_NEED_RTNL,
5476         },
5477         {
5478                 .cmd = NL80211_CMD_GET_STATION,
5479                 .doit = nl80211_get_station,
5480                 .dumpit = nl80211_dump_station,
5481                 .policy = nl80211_policy,
5482                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5483                                   NL80211_FLAG_NEED_RTNL,
5484         },
5485         {
5486                 .cmd = NL80211_CMD_SET_STATION,
5487                 .doit = nl80211_set_station,
5488                 .policy = nl80211_policy,
5489                 .flags = GENL_ADMIN_PERM,
5490                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5491                                   NL80211_FLAG_NEED_RTNL,
5492         },
5493         {
5494                 .cmd = NL80211_CMD_NEW_STATION,
5495                 .doit = nl80211_new_station,
5496                 .policy = nl80211_policy,
5497                 .flags = GENL_ADMIN_PERM,
5498                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5499                                   NL80211_FLAG_NEED_RTNL,
5500         },
5501         {
5502                 .cmd = NL80211_CMD_DEL_STATION,
5503                 .doit = nl80211_del_station,
5504                 .policy = nl80211_policy,
5505                 .flags = GENL_ADMIN_PERM,
5506                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5507                                   NL80211_FLAG_NEED_RTNL,
5508         },
5509         {
5510                 .cmd = NL80211_CMD_GET_MPATH,
5511                 .doit = nl80211_get_mpath,
5512                 .dumpit = nl80211_dump_mpath,
5513                 .policy = nl80211_policy,
5514                 .flags = GENL_ADMIN_PERM,
5515                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5516                                   NL80211_FLAG_NEED_RTNL,
5517         },
5518         {
5519                 .cmd = NL80211_CMD_SET_MPATH,
5520                 .doit = nl80211_set_mpath,
5521                 .policy = nl80211_policy,
5522                 .flags = GENL_ADMIN_PERM,
5523                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5524                                   NL80211_FLAG_NEED_RTNL,
5525         },
5526         {
5527                 .cmd = NL80211_CMD_NEW_MPATH,
5528                 .doit = nl80211_new_mpath,
5529                 .policy = nl80211_policy,
5530                 .flags = GENL_ADMIN_PERM,
5531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5532                                   NL80211_FLAG_NEED_RTNL,
5533         },
5534         {
5535                 .cmd = NL80211_CMD_DEL_MPATH,
5536                 .doit = nl80211_del_mpath,
5537                 .policy = nl80211_policy,
5538                 .flags = GENL_ADMIN_PERM,
5539                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5540                                   NL80211_FLAG_NEED_RTNL,
5541         },
5542         {
5543                 .cmd = NL80211_CMD_SET_BSS,
5544                 .doit = nl80211_set_bss,
5545                 .policy = nl80211_policy,
5546                 .flags = GENL_ADMIN_PERM,
5547                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5548                                   NL80211_FLAG_NEED_RTNL,
5549         },
5550         {
5551                 .cmd = NL80211_CMD_GET_REG,
5552                 .doit = nl80211_get_reg,
5553                 .policy = nl80211_policy,
5554                 /* can be retrieved by unprivileged users */
5555         },
5556         {
5557                 .cmd = NL80211_CMD_SET_REG,
5558                 .doit = nl80211_set_reg,
5559                 .policy = nl80211_policy,
5560                 .flags = GENL_ADMIN_PERM,
5561         },
5562         {
5563                 .cmd = NL80211_CMD_REQ_SET_REG,
5564                 .doit = nl80211_req_set_reg,
5565                 .policy = nl80211_policy,
5566                 .flags = GENL_ADMIN_PERM,
5567         },
5568         {
5569                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
5570                 .doit = nl80211_get_mesh_config,
5571                 .policy = nl80211_policy,
5572                 /* can be retrieved by unprivileged users */
5573                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5574                                   NL80211_FLAG_NEED_RTNL,
5575         },
5576         {
5577                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
5578                 .doit = nl80211_update_mesh_config,
5579                 .policy = nl80211_policy,
5580                 .flags = GENL_ADMIN_PERM,
5581                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5582                                   NL80211_FLAG_NEED_RTNL,
5583         },
5584         {
5585                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5586                 .doit = nl80211_trigger_scan,
5587                 .policy = nl80211_policy,
5588                 .flags = GENL_ADMIN_PERM,
5589                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5590                                   NL80211_FLAG_NEED_RTNL,
5591         },
5592         {
5593                 .cmd = NL80211_CMD_GET_SCAN,
5594                 .policy = nl80211_policy,
5595                 .dumpit = nl80211_dump_scan,
5596         },
5597         {
5598                 .cmd = NL80211_CMD_START_SCHED_SCAN,
5599                 .doit = nl80211_start_sched_scan,
5600                 .policy = nl80211_policy,
5601                 .flags = GENL_ADMIN_PERM,
5602                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5603                                   NL80211_FLAG_NEED_RTNL,
5604         },
5605         {
5606                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
5607                 .doit = nl80211_stop_sched_scan,
5608                 .policy = nl80211_policy,
5609                 .flags = GENL_ADMIN_PERM,
5610                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5611                                   NL80211_FLAG_NEED_RTNL,
5612         },
5613         {
5614                 .cmd = NL80211_CMD_AUTHENTICATE,
5615                 .doit = nl80211_authenticate,
5616                 .policy = nl80211_policy,
5617                 .flags = GENL_ADMIN_PERM,
5618                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5619                                   NL80211_FLAG_NEED_RTNL,
5620         },
5621         {
5622                 .cmd = NL80211_CMD_ASSOCIATE,
5623                 .doit = nl80211_associate,
5624                 .policy = nl80211_policy,
5625                 .flags = GENL_ADMIN_PERM,
5626                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5627                                   NL80211_FLAG_NEED_RTNL,
5628         },
5629         {
5630                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5631                 .doit = nl80211_deauthenticate,
5632                 .policy = nl80211_policy,
5633                 .flags = GENL_ADMIN_PERM,
5634                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5635                                   NL80211_FLAG_NEED_RTNL,
5636         },
5637         {
5638                 .cmd = NL80211_CMD_DISASSOCIATE,
5639                 .doit = nl80211_disassociate,
5640                 .policy = nl80211_policy,
5641                 .flags = GENL_ADMIN_PERM,
5642                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5643                                   NL80211_FLAG_NEED_RTNL,
5644         },
5645         {
5646                 .cmd = NL80211_CMD_JOIN_IBSS,
5647                 .doit = nl80211_join_ibss,
5648                 .policy = nl80211_policy,
5649                 .flags = GENL_ADMIN_PERM,
5650                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5651                                   NL80211_FLAG_NEED_RTNL,
5652         },
5653         {
5654                 .cmd = NL80211_CMD_LEAVE_IBSS,
5655                 .doit = nl80211_leave_ibss,
5656                 .policy = nl80211_policy,
5657                 .flags = GENL_ADMIN_PERM,
5658                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5659                                   NL80211_FLAG_NEED_RTNL,
5660         },
5661 #ifdef CONFIG_NL80211_TESTMODE
5662         {
5663                 .cmd = NL80211_CMD_TESTMODE,
5664                 .doit = nl80211_testmode_do,
5665                 .policy = nl80211_policy,
5666                 .flags = GENL_ADMIN_PERM,
5667                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5668                                   NL80211_FLAG_NEED_RTNL,
5669         },
5670 #endif
5671         {
5672                 .cmd = NL80211_CMD_CONNECT,
5673                 .doit = nl80211_connect,
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_DISCONNECT,
5681                 .doit = nl80211_disconnect,
5682                 .policy = nl80211_policy,
5683                 .flags = GENL_ADMIN_PERM,
5684                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5685                                   NL80211_FLAG_NEED_RTNL,
5686         },
5687         {
5688                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5689                 .doit = nl80211_wiphy_netns,
5690                 .policy = nl80211_policy,
5691                 .flags = GENL_ADMIN_PERM,
5692                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5693                                   NL80211_FLAG_NEED_RTNL,
5694         },
5695         {
5696                 .cmd = NL80211_CMD_GET_SURVEY,
5697                 .policy = nl80211_policy,
5698                 .dumpit = nl80211_dump_survey,
5699         },
5700         {
5701                 .cmd = NL80211_CMD_SET_PMKSA,
5702                 .doit = nl80211_setdel_pmksa,
5703                 .policy = nl80211_policy,
5704                 .flags = GENL_ADMIN_PERM,
5705                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5706                                   NL80211_FLAG_NEED_RTNL,
5707         },
5708         {
5709                 .cmd = NL80211_CMD_DEL_PMKSA,
5710                 .doit = nl80211_setdel_pmksa,
5711                 .policy = nl80211_policy,
5712                 .flags = GENL_ADMIN_PERM,
5713                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5714                                   NL80211_FLAG_NEED_RTNL,
5715         },
5716         {
5717                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5718                 .doit = nl80211_flush_pmksa,
5719                 .policy = nl80211_policy,
5720                 .flags = GENL_ADMIN_PERM,
5721                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5722                                   NL80211_FLAG_NEED_RTNL,
5723         },
5724         {
5725                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5726                 .doit = nl80211_remain_on_channel,
5727                 .policy = nl80211_policy,
5728                 .flags = GENL_ADMIN_PERM,
5729                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5730                                   NL80211_FLAG_NEED_RTNL,
5731         },
5732         {
5733                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5734                 .doit = nl80211_cancel_remain_on_channel,
5735                 .policy = nl80211_policy,
5736                 .flags = GENL_ADMIN_PERM,
5737                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5738                                   NL80211_FLAG_NEED_RTNL,
5739         },
5740         {
5741                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5742                 .doit = nl80211_set_tx_bitrate_mask,
5743                 .policy = nl80211_policy,
5744                 .flags = GENL_ADMIN_PERM,
5745                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5746                                   NL80211_FLAG_NEED_RTNL,
5747         },
5748         {
5749                 .cmd = NL80211_CMD_REGISTER_FRAME,
5750                 .doit = nl80211_register_mgmt,
5751                 .policy = nl80211_policy,
5752                 .flags = GENL_ADMIN_PERM,
5753                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5754                                   NL80211_FLAG_NEED_RTNL,
5755         },
5756         {
5757                 .cmd = NL80211_CMD_FRAME,
5758                 .doit = nl80211_tx_mgmt,
5759                 .policy = nl80211_policy,
5760                 .flags = GENL_ADMIN_PERM,
5761                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5762                                   NL80211_FLAG_NEED_RTNL,
5763         },
5764         {
5765                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5766                 .doit = nl80211_tx_mgmt_cancel_wait,
5767                 .policy = nl80211_policy,
5768                 .flags = GENL_ADMIN_PERM,
5769                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5770                                   NL80211_FLAG_NEED_RTNL,
5771         },
5772         {
5773                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5774                 .doit = nl80211_set_power_save,
5775                 .policy = nl80211_policy,
5776                 .flags = GENL_ADMIN_PERM,
5777                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5778                                   NL80211_FLAG_NEED_RTNL,
5779         },
5780         {
5781                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5782                 .doit = nl80211_get_power_save,
5783                 .policy = nl80211_policy,
5784                 /* can be retrieved by unprivileged users */
5785                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5786                                   NL80211_FLAG_NEED_RTNL,
5787         },
5788         {
5789                 .cmd = NL80211_CMD_SET_CQM,
5790                 .doit = nl80211_set_cqm,
5791                 .policy = nl80211_policy,
5792                 .flags = GENL_ADMIN_PERM,
5793                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5794                                   NL80211_FLAG_NEED_RTNL,
5795         },
5796         {
5797                 .cmd = NL80211_CMD_SET_CHANNEL,
5798                 .doit = nl80211_set_channel,
5799                 .policy = nl80211_policy,
5800                 .flags = GENL_ADMIN_PERM,
5801                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5802                                   NL80211_FLAG_NEED_RTNL,
5803         },
5804         {
5805                 .cmd = NL80211_CMD_SET_WDS_PEER,
5806                 .doit = nl80211_set_wds_peer,
5807                 .policy = nl80211_policy,
5808                 .flags = GENL_ADMIN_PERM,
5809                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5810                                   NL80211_FLAG_NEED_RTNL,
5811         },
5812         {
5813                 .cmd = NL80211_CMD_JOIN_MESH,
5814                 .doit = nl80211_join_mesh,
5815                 .policy = nl80211_policy,
5816                 .flags = GENL_ADMIN_PERM,
5817                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5818                                   NL80211_FLAG_NEED_RTNL,
5819         },
5820         {
5821                 .cmd = NL80211_CMD_LEAVE_MESH,
5822                 .doit = nl80211_leave_mesh,
5823                 .policy = nl80211_policy,
5824                 .flags = GENL_ADMIN_PERM,
5825                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5826                                   NL80211_FLAG_NEED_RTNL,
5827         },
5828         {
5829                 .cmd = NL80211_CMD_GET_WOWLAN,
5830                 .doit = nl80211_get_wowlan,
5831                 .policy = nl80211_policy,
5832                 /* can be retrieved by unprivileged users */
5833                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5834                                   NL80211_FLAG_NEED_RTNL,
5835         },
5836         {
5837                 .cmd = NL80211_CMD_SET_WOWLAN,
5838                 .doit = nl80211_set_wowlan,
5839                 .policy = nl80211_policy,
5840                 .flags = GENL_ADMIN_PERM,
5841                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5842                                   NL80211_FLAG_NEED_RTNL,
5843         },
5844 };
5845
5846 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5847         .name = "mlme",
5848 };
5849
5850 /* multicast groups */
5851 static struct genl_multicast_group nl80211_config_mcgrp = {
5852         .name = "config",
5853 };
5854 static struct genl_multicast_group nl80211_scan_mcgrp = {
5855         .name = "scan",
5856 };
5857 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5858         .name = "regulatory",
5859 };
5860
5861 /* notification functions */
5862
5863 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5864 {
5865         struct sk_buff *msg;
5866
5867         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5868         if (!msg)
5869                 return;
5870
5871         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5872                 nlmsg_free(msg);
5873                 return;
5874         }
5875
5876         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5877                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5878 }
5879
5880 static int nl80211_add_scan_req(struct sk_buff *msg,
5881                                 struct cfg80211_registered_device *rdev)
5882 {
5883         struct cfg80211_scan_request *req = rdev->scan_req;
5884         struct nlattr *nest;
5885         int i;
5886
5887         ASSERT_RDEV_LOCK(rdev);
5888
5889         if (WARN_ON(!req))
5890                 return 0;
5891
5892         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5893         if (!nest)
5894                 goto nla_put_failure;
5895         for (i = 0; i < req->n_ssids; i++)
5896                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5897         nla_nest_end(msg, nest);
5898
5899         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5900         if (!nest)
5901                 goto nla_put_failure;
5902         for (i = 0; i < req->n_channels; i++)
5903                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5904         nla_nest_end(msg, nest);
5905
5906         if (req->ie)
5907                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5908
5909         return 0;
5910  nla_put_failure:
5911         return -ENOBUFS;
5912 }
5913
5914 static int nl80211_send_scan_msg(struct sk_buff *msg,
5915                                  struct cfg80211_registered_device *rdev,
5916                                  struct net_device *netdev,
5917                                  u32 pid, u32 seq, int flags,
5918                                  u32 cmd)
5919 {
5920         void *hdr;
5921
5922         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5923         if (!hdr)
5924                 return -1;
5925
5926         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5927         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5928
5929         /* ignore errors and send incomplete event anyway */
5930         nl80211_add_scan_req(msg, rdev);
5931
5932         return genlmsg_end(msg, hdr);
5933
5934  nla_put_failure:
5935         genlmsg_cancel(msg, hdr);
5936         return -EMSGSIZE;
5937 }
5938
5939 static int
5940 nl80211_send_sched_scan_msg(struct sk_buff *msg,
5941                             struct cfg80211_registered_device *rdev,
5942                             struct net_device *netdev,
5943                             u32 pid, u32 seq, int flags, u32 cmd)
5944 {
5945         void *hdr;
5946
5947         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5948         if (!hdr)
5949                 return -1;
5950
5951         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5952         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5953
5954         return genlmsg_end(msg, hdr);
5955
5956  nla_put_failure:
5957         genlmsg_cancel(msg, hdr);
5958         return -EMSGSIZE;
5959 }
5960
5961 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5962                              struct net_device *netdev)
5963 {
5964         struct sk_buff *msg;
5965
5966         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5967         if (!msg)
5968                 return;
5969
5970         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5971                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5972                 nlmsg_free(msg);
5973                 return;
5974         }
5975
5976         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5977                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5978 }
5979
5980 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5981                             struct net_device *netdev)
5982 {
5983         struct sk_buff *msg;
5984
5985         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5986         if (!msg)
5987                 return;
5988
5989         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5990                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5991                 nlmsg_free(msg);
5992                 return;
5993         }
5994
5995         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5996                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5997 }
5998
5999 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
6000                                struct net_device *netdev)
6001 {
6002         struct sk_buff *msg;
6003
6004         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6005         if (!msg)
6006                 return;
6007
6008         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6009                                   NL80211_CMD_SCAN_ABORTED) < 0) {
6010                 nlmsg_free(msg);
6011                 return;
6012         }
6013
6014         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6015                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6016 }
6017
6018 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
6019                                      struct net_device *netdev)
6020 {
6021         struct sk_buff *msg;
6022
6023         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6024         if (!msg)
6025                 return;
6026
6027         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
6028                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
6029                 nlmsg_free(msg);
6030                 return;
6031         }
6032
6033         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6034                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6035 }
6036
6037 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
6038                              struct net_device *netdev, u32 cmd)
6039 {
6040         struct sk_buff *msg;
6041
6042         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6043         if (!msg)
6044                 return;
6045
6046         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
6047                 nlmsg_free(msg);
6048                 return;
6049         }
6050
6051         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6052                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6053 }
6054
6055 /*
6056  * This can happen on global regulatory changes or device specific settings
6057  * based on custom world regulatory domains.
6058  */
6059 void nl80211_send_reg_change_event(struct regulatory_request *request)
6060 {
6061         struct sk_buff *msg;
6062         void *hdr;
6063
6064         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6065         if (!msg)
6066                 return;
6067
6068         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
6069         if (!hdr) {
6070                 nlmsg_free(msg);
6071                 return;
6072         }
6073
6074         /* Userspace can always count this one always being set */
6075         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
6076
6077         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
6078                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6079                            NL80211_REGDOM_TYPE_WORLD);
6080         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
6081                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6082                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
6083         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
6084                  request->intersect)
6085                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6086                            NL80211_REGDOM_TYPE_INTERSECTION);
6087         else {
6088                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6089                            NL80211_REGDOM_TYPE_COUNTRY);
6090                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
6091         }
6092
6093         if (wiphy_idx_valid(request->wiphy_idx))
6094                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
6095
6096         if (genlmsg_end(msg, hdr) < 0) {
6097                 nlmsg_free(msg);
6098                 return;
6099         }
6100
6101         rcu_read_lock();
6102         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6103                                 GFP_ATOMIC);
6104         rcu_read_unlock();
6105
6106         return;
6107
6108 nla_put_failure:
6109         genlmsg_cancel(msg, hdr);
6110         nlmsg_free(msg);
6111 }
6112
6113 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
6114                                     struct net_device *netdev,
6115                                     const u8 *buf, size_t len,
6116                                     enum nl80211_commands cmd, gfp_t gfp)
6117 {
6118         struct sk_buff *msg;
6119         void *hdr;
6120
6121         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6122         if (!msg)
6123                 return;
6124
6125         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6126         if (!hdr) {
6127                 nlmsg_free(msg);
6128                 return;
6129         }
6130
6131         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6132         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6133         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6134
6135         if (genlmsg_end(msg, hdr) < 0) {
6136                 nlmsg_free(msg);
6137                 return;
6138         }
6139
6140         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6141                                 nl80211_mlme_mcgrp.id, gfp);
6142         return;
6143
6144  nla_put_failure:
6145         genlmsg_cancel(msg, hdr);
6146         nlmsg_free(msg);
6147 }
6148
6149 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
6150                           struct net_device *netdev, const u8 *buf,
6151                           size_t len, gfp_t gfp)
6152 {
6153         nl80211_send_mlme_event(rdev, netdev, buf, len,
6154                                 NL80211_CMD_AUTHENTICATE, gfp);
6155 }
6156
6157 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
6158                            struct net_device *netdev, const u8 *buf,
6159                            size_t len, gfp_t gfp)
6160 {
6161         nl80211_send_mlme_event(rdev, netdev, buf, len,
6162                                 NL80211_CMD_ASSOCIATE, gfp);
6163 }
6164
6165 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
6166                          struct net_device *netdev, const u8 *buf,
6167                          size_t len, gfp_t gfp)
6168 {
6169         nl80211_send_mlme_event(rdev, netdev, buf, len,
6170                                 NL80211_CMD_DEAUTHENTICATE, gfp);
6171 }
6172
6173 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
6174                            struct net_device *netdev, const u8 *buf,
6175                            size_t len, gfp_t gfp)
6176 {
6177         nl80211_send_mlme_event(rdev, netdev, buf, len,
6178                                 NL80211_CMD_DISASSOCIATE, gfp);
6179 }
6180
6181 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
6182                                 struct net_device *netdev, const u8 *buf,
6183                                 size_t len, gfp_t gfp)
6184 {
6185         nl80211_send_mlme_event(rdev, netdev, buf, len,
6186                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
6187 }
6188
6189 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
6190                                   struct net_device *netdev, const u8 *buf,
6191                                   size_t len, gfp_t gfp)
6192 {
6193         nl80211_send_mlme_event(rdev, netdev, buf, len,
6194                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
6195 }
6196
6197 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
6198                                       struct net_device *netdev, int cmd,
6199                                       const u8 *addr, gfp_t gfp)
6200 {
6201         struct sk_buff *msg;
6202         void *hdr;
6203
6204         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6205         if (!msg)
6206                 return;
6207
6208         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6209         if (!hdr) {
6210                 nlmsg_free(msg);
6211                 return;
6212         }
6213
6214         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6215         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6216         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
6217         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6218
6219         if (genlmsg_end(msg, hdr) < 0) {
6220                 nlmsg_free(msg);
6221                 return;
6222         }
6223
6224         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6225                                 nl80211_mlme_mcgrp.id, gfp);
6226         return;
6227
6228  nla_put_failure:
6229         genlmsg_cancel(msg, hdr);
6230         nlmsg_free(msg);
6231 }
6232
6233 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
6234                                struct net_device *netdev, const u8 *addr,
6235                                gfp_t gfp)
6236 {
6237         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
6238                                   addr, gfp);
6239 }
6240
6241 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
6242                                 struct net_device *netdev, const u8 *addr,
6243                                 gfp_t gfp)
6244 {
6245         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
6246                                   addr, gfp);
6247 }
6248
6249 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
6250                                  struct net_device *netdev, const u8 *bssid,
6251                                  const u8 *req_ie, size_t req_ie_len,
6252                                  const u8 *resp_ie, size_t resp_ie_len,
6253                                  u16 status, gfp_t gfp)
6254 {
6255         struct sk_buff *msg;
6256         void *hdr;
6257
6258         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6259         if (!msg)
6260                 return;
6261
6262         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
6263         if (!hdr) {
6264                 nlmsg_free(msg);
6265                 return;
6266         }
6267
6268         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6269         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6270         if (bssid)
6271                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6272         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
6273         if (req_ie)
6274                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6275         if (resp_ie)
6276                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6277
6278         if (genlmsg_end(msg, hdr) < 0) {
6279                 nlmsg_free(msg);
6280                 return;
6281         }
6282
6283         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6284                                 nl80211_mlme_mcgrp.id, gfp);
6285         return;
6286
6287  nla_put_failure:
6288         genlmsg_cancel(msg, hdr);
6289         nlmsg_free(msg);
6290
6291 }
6292
6293 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
6294                          struct net_device *netdev, const u8 *bssid,
6295                          const u8 *req_ie, size_t req_ie_len,
6296                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
6297 {
6298         struct sk_buff *msg;
6299         void *hdr;
6300
6301         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6302         if (!msg)
6303                 return;
6304
6305         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
6306         if (!hdr) {
6307                 nlmsg_free(msg);
6308                 return;
6309         }
6310
6311         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6312         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6313         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6314         if (req_ie)
6315                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6316         if (resp_ie)
6317                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6318
6319         if (genlmsg_end(msg, hdr) < 0) {
6320                 nlmsg_free(msg);
6321                 return;
6322         }
6323
6324         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6325                                 nl80211_mlme_mcgrp.id, gfp);
6326         return;
6327
6328  nla_put_failure:
6329         genlmsg_cancel(msg, hdr);
6330         nlmsg_free(msg);
6331
6332 }
6333
6334 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
6335                                struct net_device *netdev, u16 reason,
6336                                const u8 *ie, size_t ie_len, bool from_ap)
6337 {
6338         struct sk_buff *msg;
6339         void *hdr;
6340
6341         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6342         if (!msg)
6343                 return;
6344
6345         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
6346         if (!hdr) {
6347                 nlmsg_free(msg);
6348                 return;
6349         }
6350
6351         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6352         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6353         if (from_ap && reason)
6354                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
6355         if (from_ap)
6356                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
6357         if (ie)
6358                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
6359
6360         if (genlmsg_end(msg, hdr) < 0) {
6361                 nlmsg_free(msg);
6362                 return;
6363         }
6364
6365         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6366                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
6367         return;
6368
6369  nla_put_failure:
6370         genlmsg_cancel(msg, hdr);
6371         nlmsg_free(msg);
6372
6373 }
6374
6375 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
6376                              struct net_device *netdev, const u8 *bssid,
6377                              gfp_t gfp)
6378 {
6379         struct sk_buff *msg;
6380         void *hdr;
6381
6382         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6383         if (!msg)
6384                 return;
6385
6386         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
6387         if (!hdr) {
6388                 nlmsg_free(msg);
6389                 return;
6390         }
6391
6392         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6393         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6394         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6395
6396         if (genlmsg_end(msg, hdr) < 0) {
6397                 nlmsg_free(msg);
6398                 return;
6399         }
6400
6401         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6402                                 nl80211_mlme_mcgrp.id, gfp);
6403         return;
6404
6405  nla_put_failure:
6406         genlmsg_cancel(msg, hdr);
6407         nlmsg_free(msg);
6408 }
6409
6410 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
6411                 struct net_device *netdev,
6412                 const u8 *macaddr, const u8* ie, u8 ie_len,
6413                 gfp_t gfp)
6414 {
6415         struct sk_buff *msg;
6416         void *hdr;
6417
6418         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6419         if (!msg)
6420                 return;
6421
6422         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
6423         if (!hdr) {
6424                 nlmsg_free(msg);
6425                 return;
6426         }
6427
6428         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6429         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6430         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
6431         if (ie_len && ie)
6432                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
6433
6434         if (genlmsg_end(msg, hdr) < 0) {
6435                 nlmsg_free(msg);
6436                 return;
6437         }
6438
6439         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6440                                 nl80211_mlme_mcgrp.id, gfp);
6441         return;
6442
6443  nla_put_failure:
6444         genlmsg_cancel(msg, hdr);
6445         nlmsg_free(msg);
6446 }
6447
6448 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
6449                                  struct net_device *netdev, const u8 *addr,
6450                                  enum nl80211_key_type key_type, int key_id,
6451                                  const u8 *tsc, gfp_t gfp)
6452 {
6453         struct sk_buff *msg;
6454         void *hdr;
6455
6456         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6457         if (!msg)
6458                 return;
6459
6460         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
6461         if (!hdr) {
6462                 nlmsg_free(msg);
6463                 return;
6464         }
6465
6466         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6467         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6468         if (addr)
6469                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6470         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
6471         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
6472         if (tsc)
6473                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
6474
6475         if (genlmsg_end(msg, hdr) < 0) {
6476                 nlmsg_free(msg);
6477                 return;
6478         }
6479
6480         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6481                                 nl80211_mlme_mcgrp.id, gfp);
6482         return;
6483
6484  nla_put_failure:
6485         genlmsg_cancel(msg, hdr);
6486         nlmsg_free(msg);
6487 }
6488
6489 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
6490                                     struct ieee80211_channel *channel_before,
6491                                     struct ieee80211_channel *channel_after)
6492 {
6493         struct sk_buff *msg;
6494         void *hdr;
6495         struct nlattr *nl_freq;
6496
6497         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
6498         if (!msg)
6499                 return;
6500
6501         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
6502         if (!hdr) {
6503                 nlmsg_free(msg);
6504                 return;
6505         }
6506
6507         /*
6508          * Since we are applying the beacon hint to a wiphy we know its
6509          * wiphy_idx is valid
6510          */
6511         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
6512
6513         /* Before */
6514         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
6515         if (!nl_freq)
6516                 goto nla_put_failure;
6517         if (nl80211_msg_put_channel(msg, channel_before))
6518                 goto nla_put_failure;
6519         nla_nest_end(msg, nl_freq);
6520
6521         /* After */
6522         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
6523         if (!nl_freq)
6524                 goto nla_put_failure;
6525         if (nl80211_msg_put_channel(msg, channel_after))
6526                 goto nla_put_failure;
6527         nla_nest_end(msg, nl_freq);
6528
6529         if (genlmsg_end(msg, hdr) < 0) {
6530                 nlmsg_free(msg);
6531                 return;
6532         }
6533
6534         rcu_read_lock();
6535         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6536                                 GFP_ATOMIC);
6537         rcu_read_unlock();
6538
6539         return;
6540
6541 nla_put_failure:
6542         genlmsg_cancel(msg, hdr);
6543         nlmsg_free(msg);
6544 }
6545
6546 static void nl80211_send_remain_on_chan_event(
6547         int cmd, struct cfg80211_registered_device *rdev,
6548         struct net_device *netdev, u64 cookie,
6549         struct ieee80211_channel *chan,
6550         enum nl80211_channel_type channel_type,
6551         unsigned int duration, gfp_t gfp)
6552 {
6553         struct sk_buff *msg;
6554         void *hdr;
6555
6556         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6557         if (!msg)
6558                 return;
6559
6560         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6561         if (!hdr) {
6562                 nlmsg_free(msg);
6563                 return;
6564         }
6565
6566         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6567         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6568         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
6569         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
6570         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6571
6572         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
6573                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
6574
6575         if (genlmsg_end(msg, hdr) < 0) {
6576                 nlmsg_free(msg);
6577                 return;
6578         }
6579
6580         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6581                                 nl80211_mlme_mcgrp.id, gfp);
6582         return;
6583
6584  nla_put_failure:
6585         genlmsg_cancel(msg, hdr);
6586         nlmsg_free(msg);
6587 }
6588
6589 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
6590                                     struct net_device *netdev, u64 cookie,
6591                                     struct ieee80211_channel *chan,
6592                                     enum nl80211_channel_type channel_type,
6593                                     unsigned int duration, gfp_t gfp)
6594 {
6595         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
6596                                           rdev, netdev, cookie, chan,
6597                                           channel_type, duration, gfp);
6598 }
6599
6600 void nl80211_send_remain_on_channel_cancel(
6601         struct cfg80211_registered_device *rdev, struct net_device *netdev,
6602         u64 cookie, struct ieee80211_channel *chan,
6603         enum nl80211_channel_type channel_type, gfp_t gfp)
6604 {
6605         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6606                                           rdev, netdev, cookie, chan,
6607                                           channel_type, 0, gfp);
6608 }
6609
6610 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
6611                             struct net_device *dev, const u8 *mac_addr,
6612                             struct station_info *sinfo, gfp_t gfp)
6613 {
6614         struct sk_buff *msg;
6615
6616         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6617         if (!msg)
6618                 return;
6619
6620         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6621                 nlmsg_free(msg);
6622                 return;
6623         }
6624
6625         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6626                                 nl80211_mlme_mcgrp.id, gfp);
6627 }
6628
6629 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
6630                                 struct net_device *dev, const u8 *mac_addr,
6631                                 gfp_t gfp)
6632 {
6633         struct sk_buff *msg;
6634         void *hdr;
6635
6636         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6637         if (!msg)
6638                 return;
6639
6640         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
6641         if (!hdr) {
6642                 nlmsg_free(msg);
6643                 return;
6644         }
6645
6646         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
6647         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
6648
6649         if (genlmsg_end(msg, hdr) < 0) {
6650                 nlmsg_free(msg);
6651                 return;
6652         }
6653
6654         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6655                                 nl80211_mlme_mcgrp.id, gfp);
6656         return;
6657
6658  nla_put_failure:
6659         genlmsg_cancel(msg, hdr);
6660         nlmsg_free(msg);
6661 }
6662
6663 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
6664                       struct net_device *netdev, u32 nlpid,
6665                       int freq, const u8 *buf, size_t len, gfp_t gfp)
6666 {
6667         struct sk_buff *msg;
6668         void *hdr;
6669         int err;
6670
6671         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6672         if (!msg)
6673                 return -ENOMEM;
6674
6675         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
6676         if (!hdr) {
6677                 nlmsg_free(msg);
6678                 return -ENOMEM;
6679         }
6680
6681         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6682         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6683         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6684         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6685
6686         err = genlmsg_end(msg, hdr);
6687         if (err < 0) {
6688                 nlmsg_free(msg);
6689                 return err;
6690         }
6691
6692         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6693         if (err < 0)
6694                 return err;
6695         return 0;
6696
6697  nla_put_failure:
6698         genlmsg_cancel(msg, hdr);
6699         nlmsg_free(msg);
6700         return -ENOBUFS;
6701 }
6702
6703 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
6704                                  struct net_device *netdev, u64 cookie,
6705                                  const u8 *buf, size_t len, bool ack,
6706                                  gfp_t gfp)
6707 {
6708         struct sk_buff *msg;
6709         void *hdr;
6710
6711         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6712         if (!msg)
6713                 return;
6714
6715         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6716         if (!hdr) {
6717                 nlmsg_free(msg);
6718                 return;
6719         }
6720
6721         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6722         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6723         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6724         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6725         if (ack)
6726                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6727
6728         if (genlmsg_end(msg, hdr) < 0) {
6729                 nlmsg_free(msg);
6730                 return;
6731         }
6732
6733         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6734         return;
6735
6736  nla_put_failure:
6737         genlmsg_cancel(msg, hdr);
6738         nlmsg_free(msg);
6739 }
6740
6741 void
6742 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6743                              struct net_device *netdev,
6744                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6745                              gfp_t gfp)
6746 {
6747         struct sk_buff *msg;
6748         struct nlattr *pinfoattr;
6749         void *hdr;
6750
6751         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6752         if (!msg)
6753                 return;
6754
6755         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6756         if (!hdr) {
6757                 nlmsg_free(msg);
6758                 return;
6759         }
6760
6761         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6762         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6763
6764         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6765         if (!pinfoattr)
6766                 goto nla_put_failure;
6767
6768         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6769                     rssi_event);
6770
6771         nla_nest_end(msg, pinfoattr);
6772
6773         if (genlmsg_end(msg, hdr) < 0) {
6774                 nlmsg_free(msg);
6775                 return;
6776         }
6777
6778         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6779                                 nl80211_mlme_mcgrp.id, gfp);
6780         return;
6781
6782  nla_put_failure:
6783         genlmsg_cancel(msg, hdr);
6784         nlmsg_free(msg);
6785 }
6786
6787 void
6788 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
6789                                 struct net_device *netdev, const u8 *peer,
6790                                 u32 num_packets, gfp_t gfp)
6791 {
6792         struct sk_buff *msg;
6793         struct nlattr *pinfoattr;
6794         void *hdr;
6795
6796         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6797         if (!msg)
6798                 return;
6799
6800         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6801         if (!hdr) {
6802                 nlmsg_free(msg);
6803                 return;
6804         }
6805
6806         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6807         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6808         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6809
6810         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6811         if (!pinfoattr)
6812                 goto nla_put_failure;
6813
6814         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6815
6816         nla_nest_end(msg, pinfoattr);
6817
6818         if (genlmsg_end(msg, hdr) < 0) {
6819                 nlmsg_free(msg);
6820                 return;
6821         }
6822
6823         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6824                                 nl80211_mlme_mcgrp.id, gfp);
6825         return;
6826
6827  nla_put_failure:
6828         genlmsg_cancel(msg, hdr);
6829         nlmsg_free(msg);
6830 }
6831
6832 static int nl80211_netlink_notify(struct notifier_block * nb,
6833                                   unsigned long state,
6834                                   void *_notify)
6835 {
6836         struct netlink_notify *notify = _notify;
6837         struct cfg80211_registered_device *rdev;
6838         struct wireless_dev *wdev;
6839
6840         if (state != NETLINK_URELEASE)
6841                 return NOTIFY_DONE;
6842
6843         rcu_read_lock();
6844
6845         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6846                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6847                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6848
6849         rcu_read_unlock();
6850
6851         return NOTIFY_DONE;
6852 }
6853
6854 static struct notifier_block nl80211_netlink_notifier = {
6855         .notifier_call = nl80211_netlink_notify,
6856 };
6857
6858 /* initialisation/exit functions */
6859
6860 int nl80211_init(void)
6861 {
6862         int err;
6863
6864         err = genl_register_family_with_ops(&nl80211_fam,
6865                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6866         if (err)
6867                 return err;
6868
6869         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6870         if (err)
6871                 goto err_out;
6872
6873         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6874         if (err)
6875                 goto err_out;
6876
6877         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6878         if (err)
6879                 goto err_out;
6880
6881         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6882         if (err)
6883                 goto err_out;
6884
6885 #ifdef CONFIG_NL80211_TESTMODE
6886         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6887         if (err)
6888                 goto err_out;
6889 #endif
6890
6891         err = netlink_register_notifier(&nl80211_netlink_notifier);
6892         if (err)
6893                 goto err_out;
6894
6895         return 0;
6896  err_out:
6897         genl_unregister_family(&nl80211_fam);
6898         return err;
6899 }
6900
6901 void nl80211_exit(void)
6902 {
6903         netlink_unregister_notifier(&nl80211_netlink_notifier);
6904         genl_unregister_family(&nl80211_fam);
6905 }