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] = { .len = ETH_ALEN },
  87         [NL80211_ATTR_PREV_BSSID] = { .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] = { .len = NL80211_HT_CAPABILITY_LEN },
 130
 131         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 132         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 133                               .len = IEEE80211_MAX_DATA_LEN },
 134         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 135         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 136
 137         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 138                                 .len = IEEE80211_MAX_SSID_LEN },
 139         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 140         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 141         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 142         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 143         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 144         [NL80211_ATTR_STA_FLAGS2] = {
 145                 .len = sizeof(struct nl80211_sta_flag_update),
 146         },
 147         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 149         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 150         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 151         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 152         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 153         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 154         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 155         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 156                                  .len = WLAN_PMKID_LEN },
 157         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 158         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 159         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 160         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 161                                  .len = IEEE80211_MAX_DATA_LEN },
 162         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 163         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 164         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 165         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 166         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 167         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 169         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 170         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 171         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 172         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 173         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 174         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 175         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 176         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 177         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 178 };
 179
 180 /* policy for the key attributes */
 181 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 182         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 183         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 184         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 185         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 186         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 187         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 188         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 189         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 190 };
 191
 192 /* policy for the key default flags */
 193 static const struct nla_policy
 194 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 195         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 196         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 197 };
 198
 199 /* policy for WoWLAN attributes */
 200 static const struct nla_policy
 201 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 202         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 203         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 204         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 205         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 206 };
 207
 208 /* ifidx get helper */
 209 static int nl80211_get_ifidx(struct netlink_callback *cb)
 210 {
 211         int res;
 212
 213         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 214                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 215                           nl80211_policy);
 216         if (res)
 217                 return res;
 218
 219         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 220                 return -EINVAL;
 221
 222         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 223         if (!res)
 224                 return -EINVAL;
 225         return res;
 226 }
 227
 228 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 229                                        struct netlink_callback *cb,
 230                                        struct cfg80211_registered_device **rdev,
 231                                        struct net_device **dev)
 232 {
 233         int ifidx = cb->args[0];
 234         int err;
 235
 236         if (!ifidx)
 237                 ifidx = nl80211_get_ifidx(cb);
 238         if (ifidx < 0)
 239                 return ifidx;
 240
 241         cb->args[0] = ifidx;
 242
 243         rtnl_lock();
 244
 245         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 246         if (!*dev) {
 247                 err = -ENODEV;
 248                 goto out_rtnl;
 249         }
 250
 251         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 252         if (IS_ERR(*rdev)) {
 253                 err = PTR_ERR(*rdev);
 254                 goto out_rtnl;
 255         }
 256
 257         return 0;
 258  out_rtnl:
 259         rtnl_unlock();
 260         return err;
 261 }
 262
 263 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 264 {
 265         cfg80211_unlock_rdev(rdev);
 266         rtnl_unlock();
 267 }
 268
 269 /* IE validation */
 270 static bool is_valid_ie_attr(const struct nlattr *attr)
 271 {
 272         const u8 *pos;
 273         int len;
 274
 275         if (!attr)
 276                 return true;
 277
 278         pos = nla_data(attr);
 279         len = nla_len(attr);
 280
 281         while (len) {
 282                 u8 elemlen;
 283
 284                 if (len < 2)
 285                         return false;
 286                 len -= 2;
 287
 288                 elemlen = pos[1];
 289                 if (elemlen > len)
 290                         return false;
 291
 292                 len -= elemlen;
 293                 pos += 2 + elemlen;
 294         }
 295
 296         return true;
 297 }
 298
 299 /* message building helper */
 300 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 301                                    int flags, u8 cmd)
 302 {
 303         /* since there is no private header just add the generic one */
 304         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 305 }
 306
 307 static int nl80211_msg_put_channel(struct sk_buff *msg,
 308                                    struct ieee80211_channel *chan)
 309 {
 310         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 311                     chan->center_freq);
 312
 313         if (chan->flags & IEEE80211_CHAN_DISABLED)
 314                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 315         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 316                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 317         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 318                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 319         if (chan->flags & IEEE80211_CHAN_RADAR)
 320                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 321
 322         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 323                     DBM_TO_MBM(chan->max_power));
 324
 325         return 0;
 326
 327  nla_put_failure:
 328         return -ENOBUFS;
 329 }
 330
 331 /* netlink command implementations */
 332
 333 struct key_parse {
 334         struct key_params p;
 335         int idx;
 336         int type;
 337         bool def, defmgmt;
 338         bool def_uni, def_multi;
 339 };
 340
 341 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 342 {
 343         struct nlattr *tb[NL80211_KEY_MAX + 1];
 344         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 345                                    nl80211_key_policy);
 346         if (err)
 347                 return err;
 348
 349         k->def = !!tb[NL80211_KEY_DEFAULT];
 350         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 351
 352         if (k->def) {
 353                 k->def_uni = true;
 354                 k->def_multi = true;
 355         }
 356         if (k->defmgmt)
 357                 k->def_multi = true;
 358
 359         if (tb[NL80211_KEY_IDX])
 360                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 361
 362         if (tb[NL80211_KEY_DATA]) {
 363                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 364                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 365         }
 366
 367         if (tb[NL80211_KEY_SEQ]) {
 368                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 369                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 370         }
 371
 372         if (tb[NL80211_KEY_CIPHER])
 373                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 374
 375         if (tb[NL80211_KEY_TYPE]) {
 376                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 377                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 378                         return -EINVAL;
 379         }
 380
 381         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 382                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 383                 int err = nla_parse_nested(kdt,
 384                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 385                                            tb[NL80211_KEY_DEFAULT_TYPES],
 386                                            nl80211_key_default_policy);
 387                 if (err)
 388                         return err;
 389
 390                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 391                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 398 {
 399         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 400                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 401                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 402         }
 403
 404         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 405                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 406                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 407         }
 408
 409         if (info->attrs[NL80211_ATTR_KEY_IDX])
 410                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 411
 412         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 413                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 414
 415         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 416         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 417
 418         if (k->def) {
 419                 k->def_uni = true;
 420                 k->def_multi = true;
 421         }
 422         if (k->defmgmt)
 423                 k->def_multi = true;
 424
 425         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 426                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 427                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 428                         return -EINVAL;
 429         }
 430
 431         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 432                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 433                 int err = nla_parse_nested(
 434                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 435                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 436                                 nl80211_key_default_policy);
 437                 if (err)
 438                         return err;
 439
 440                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 441                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 442         }
 443
 444         return 0;
 445 }
 446
 447 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 448 {
 449         int err;
 450
 451         memset(k, 0, sizeof(*k));
 452         k->idx = -1;
 453         k->type = -1;
 454
 455         if (info->attrs[NL80211_ATTR_KEY])
 456                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 457         else
 458                 err = nl80211_parse_key_old(info, k);
 459
 460         if (err)
 461                 return err;
 462
 463         if (k->def && k->defmgmt)
 464                 return -EINVAL;
 465
 466         if (k->defmgmt) {
 467                 if (k->def_uni || !k->def_multi)
 468                         return -EINVAL;
 469         }
 470
 471         if (k->idx != -1) {
 472                 if (k->defmgmt) {
 473                         if (k->idx < 4 || k->idx > 5)
 474                                 return -EINVAL;
 475                 } else if (k->def) {
 476                         if (k->idx < 0 || k->idx > 3)
 477                                 return -EINVAL;
 478                 } else {
 479                         if (k->idx < 0 || k->idx > 5)
 480                                 return -EINVAL;
 481                 }
 482         }
 483
 484         return 0;
 485 }
 486
 487 static struct cfg80211_cached_keys *
 488 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 489                        struct nlattr *keys)
 490 {
 491         struct key_parse parse;
 492         struct nlattr *key;
 493         struct cfg80211_cached_keys *result;
 494         int rem, err, def = 0;
 495
 496         result = kzalloc(sizeof(*result), GFP_KERNEL);
 497         if (!result)
 498                 return ERR_PTR(-ENOMEM);
 499
 500         result->def = -1;
 501         result->defmgmt = -1;
 502
 503         nla_for_each_nested(key, keys, rem) {
 504                 memset(&parse, 0, sizeof(parse));
 505                 parse.idx = -1;
 506
 507                 err = nl80211_parse_key_new(key, &parse);
 508                 if (err)
 509                         goto error;
 510                 err = -EINVAL;
 511                 if (!parse.p.key)
 512                         goto error;
 513                 if (parse.idx < 0 || parse.idx > 4)
 514                         goto error;
 515                 if (parse.def) {
 516                         if (def)
 517                                 goto error;
 518                         def = 1;
 519                         result->def = parse.idx;
 520                         if (!parse.def_uni || !parse.def_multi)
 521                                 goto error;
 522                 } else if (parse.defmgmt)
 523                         goto error;
 524                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 525                                                      parse.idx, false, NULL);
 526                 if (err)
 527                         goto error;
 528                 result->params[parse.idx].cipher = parse.p.cipher;
 529                 result->params[parse.idx].key_len = parse.p.key_len;
 530                 result->params[parse.idx].key = result->data[parse.idx];
 531                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 532         }
 533
 534         return result;
 535  error:
 536         kfree(result);
 537         return ERR_PTR(err);
 538 }
 539
 540 static int nl80211_key_allowed(struct wireless_dev *wdev)
 541 {
 542         ASSERT_WDEV_LOCK(wdev);
 543
 544         switch (wdev->iftype) {
 545         case NL80211_IFTYPE_AP:
 546         case NL80211_IFTYPE_AP_VLAN:
 547         case NL80211_IFTYPE_P2P_GO:
 548         case NL80211_IFTYPE_MESH_POINT:
 549                 break;
 550         case NL80211_IFTYPE_ADHOC:
 551                 if (!wdev->current_bss)
 552                         return -ENOLINK;
 553                 break;
 554         case NL80211_IFTYPE_STATION:
 555         case NL80211_IFTYPE_P2P_CLIENT:
 556                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 557                         return -ENOLINK;
 558                 break;
 559         default:
 560                 return -EINVAL;
 561         }
 562
 563         return 0;
 564 }
 565
 566 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 567 {
 568         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 569         int i;
 570
 571         if (!nl_modes)
 572                 goto nla_put_failure;
 573
 574         i = 0;
 575         while (ifmodes) {
 576                 if (ifmodes & 1)
 577                         NLA_PUT_FLAG(msg, i);
 578                 ifmodes >>= 1;
 579                 i++;
 580         }
 581
 582         nla_nest_end(msg, nl_modes);
 583         return 0;
 584
 585 nla_put_failure:
 586         return -ENOBUFS;
 587 }
 588
 589 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 590                                           struct sk_buff *msg)
 591 {
 592         struct nlattr *nl_combis;
 593         int i, j;
 594
 595         nl_combis = nla_nest_start(msg,
 596                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 597         if (!nl_combis)
 598                 goto nla_put_failure;
 599
 600         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 601                 const struct ieee80211_iface_combination *c;
 602                 struct nlattr *nl_combi, *nl_limits;
 603
 604                 c = &wiphy->iface_combinations[i];
 605
 606                 nl_combi = nla_nest_start(msg, i + 1);
 607                 if (!nl_combi)
 608                         goto nla_put_failure;
 609
 610                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 611                 if (!nl_limits)
 612                         goto nla_put_failure;
 613
 614                 for (j = 0; j < c->n_limits; j++) {
 615                         struct nlattr *nl_limit;
 616
 617                         nl_limit = nla_nest_start(msg, j + 1);
 618                         if (!nl_limit)
 619                                 goto nla_put_failure;
 620                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 621                                     c->limits[j].max);
 622                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 623                                                 c->limits[j].types))
 624                                 goto nla_put_failure;
 625                         nla_nest_end(msg, nl_limit);
 626                 }
 627
 628                 nla_nest_end(msg, nl_limits);
 629
 630                 if (c->beacon_int_infra_match)
 631                         NLA_PUT_FLAG(msg,
 632                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 633                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 634                             c->num_different_channels);
 635                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 636                             c->max_interfaces);
 637
 638                 nla_nest_end(msg, nl_combi);
 639         }
 640
 641         nla_nest_end(msg, nl_combis);
 642
 643         return 0;
 644 nla_put_failure:
 645         return -ENOBUFS;
 646 }
 647
 648 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 649                               struct cfg80211_registered_device *dev)
 650 {
 651         void *hdr;
 652         struct nlattr *nl_bands, *nl_band;
 653         struct nlattr *nl_freqs, *nl_freq;
 654         struct nlattr *nl_rates, *nl_rate;
 655         struct nlattr *nl_cmds;
 656         enum ieee80211_band band;
 657         struct ieee80211_channel *chan;
 658         struct ieee80211_rate *rate;
 659         int i;
 660         const struct ieee80211_txrx_stypes *mgmt_stypes =
 661                                 dev->wiphy.mgmt_stypes;
 662
 663         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 664         if (!hdr)
 665                 return -1;
 666
 667         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 668         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 669
 670         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 671                     cfg80211_rdev_list_generation);
 672
 673         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 674                    dev->wiphy.retry_short);
 675         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 676                    dev->wiphy.retry_long);
 677         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 678                     dev->wiphy.frag_threshold);
 679         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 680                     dev->wiphy.rts_threshold);
 681         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 682                     dev->wiphy.coverage_class);
 683         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 684                    dev->wiphy.max_scan_ssids);
 685         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 686                     dev->wiphy.max_scan_ie_len);
 687
 688         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 689                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 690         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 691                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 692
 693         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 694                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 695                 dev->wiphy.cipher_suites);
 696
 697         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 698                    dev->wiphy.max_num_pmkids);
 699
 700         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 701                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 702
 703         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 704                     dev->wiphy.available_antennas_tx);
 705         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 706                     dev->wiphy.available_antennas_rx);
 707
 708         if ((dev->wiphy.available_antennas_tx ||
 709              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 710                 u32 tx_ant = 0, rx_ant = 0;
 711                 int res;
 712                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 713                 if (!res) {
 714                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 715                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 716                 }
 717         }
 718
 719         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 720                                 dev->wiphy.interface_modes))
 721                 goto nla_put_failure;
 722
 723         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 724         if (!nl_bands)
 725                 goto nla_put_failure;
 726
 727         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 728                 if (!dev->wiphy.bands[band])
 729                         continue;
 730
 731                 nl_band = nla_nest_start(msg, band);
 732                 if (!nl_band)
 733                         goto nla_put_failure;
 734
 735                 /* add HT info */
 736                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 737                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 738                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 739                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 740                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 741                                 dev->wiphy.bands[band]->ht_cap.cap);
 742                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 743                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 744                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 745                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 746                 }
 747
 748                 /* add frequencies */
 749                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 750                 if (!nl_freqs)
 751                         goto nla_put_failure;
 752
 753                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 754                         nl_freq = nla_nest_start(msg, i);
 755                         if (!nl_freq)
 756                                 goto nla_put_failure;
 757
 758                         chan = &dev->wiphy.bands[band]->channels[i];
 759
 760                         if (nl80211_msg_put_channel(msg, chan))
 761                                 goto nla_put_failure;
 762
 763                         nla_nest_end(msg, nl_freq);
 764                 }
 765
 766                 nla_nest_end(msg, nl_freqs);
 767
 768                 /* add bitrates */
 769                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 770                 if (!nl_rates)
 771                         goto nla_put_failure;
 772
 773                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 774                         nl_rate = nla_nest_start(msg, i);
 775                         if (!nl_rate)
 776                                 goto nla_put_failure;
 777
 778                         rate = &dev->wiphy.bands[band]->bitrates[i];
 779                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 780                                     rate->bitrate);
 781                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 782                                 NLA_PUT_FLAG(msg,
 783                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 784
 785                         nla_nest_end(msg, nl_rate);
 786                 }
 787
 788                 nla_nest_end(msg, nl_rates);
 789
 790                 nla_nest_end(msg, nl_band);
 791         }
 792         nla_nest_end(msg, nl_bands);
 793
 794         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 795         if (!nl_cmds)
 796                 goto nla_put_failure;
 797
 798         i = 0;
 799 #define CMD(op, n)                                              \
 800          do {                                                   \
 801                 if (dev->ops->op) {                             \
 802                         i++;                                    \
 803                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 804                 }                                               \
 805         } while (0)
 806
 807         CMD(add_virtual_intf, NEW_INTERFACE);
 808         CMD(change_virtual_intf, SET_INTERFACE);
 809         CMD(add_key, NEW_KEY);
 810         CMD(add_beacon, NEW_BEACON);
 811         CMD(add_station, NEW_STATION);
 812         CMD(add_mpath, NEW_MPATH);
 813         CMD(update_mesh_config, SET_MESH_CONFIG);
 814         CMD(change_bss, SET_BSS);
 815         CMD(auth, AUTHENTICATE);
 816         CMD(assoc, ASSOCIATE);
 817         CMD(deauth, DEAUTHENTICATE);
 818         CMD(disassoc, DISASSOCIATE);
 819         CMD(join_ibss, JOIN_IBSS);
 820         CMD(join_mesh, JOIN_MESH);
 821         CMD(set_pmksa, SET_PMKSA);
 822         CMD(del_pmksa, DEL_PMKSA);
 823         CMD(flush_pmksa, FLUSH_PMKSA);
 824         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 825         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 826         CMD(mgmt_tx, FRAME);
 827         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 828         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 829                 i++;
 830                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 831         }
 832         CMD(set_channel, SET_CHANNEL);
 833         CMD(set_wds_peer, SET_WDS_PEER);
 834         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 835                 CMD(sched_scan_start, START_SCHED_SCAN);
 836
 837 #undef CMD
 838
 839         if (dev->ops->connect || dev->ops->auth) {
 840                 i++;
 841                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 842         }
 843
 844         if (dev->ops->disconnect || dev->ops->deauth) {
 845                 i++;
 846                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 847         }
 848
 849         nla_nest_end(msg, nl_cmds);
 850
 851         if (dev->ops->remain_on_channel)
 852                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 853                             dev->wiphy.max_remain_on_channel_duration);
 854
 855         /* for now at least assume all drivers have it */
 856         if (dev->ops->mgmt_tx)
 857                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 858
 859         if (mgmt_stypes) {
 860                 u16 stypes;
 861                 struct nlattr *nl_ftypes, *nl_ifs;
 862                 enum nl80211_iftype ift;
 863
 864                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 865                 if (!nl_ifs)
 866                         goto nla_put_failure;
 867
 868                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 869                         nl_ftypes = nla_nest_start(msg, ift);
 870                         if (!nl_ftypes)
 871                                 goto nla_put_failure;
 872                         i = 0;
 873                         stypes = mgmt_stypes[ift].tx;
 874                         while (stypes) {
 875                                 if (stypes & 1)
 876                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 877                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 878                                 stypes >>= 1;
 879                                 i++;
 880                         }
 881                         nla_nest_end(msg, nl_ftypes);
 882                 }
 883
 884                 nla_nest_end(msg, nl_ifs);
 885
 886                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 887                 if (!nl_ifs)
 888                         goto nla_put_failure;
 889
 890                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 891                         nl_ftypes = nla_nest_start(msg, ift);
 892                         if (!nl_ftypes)
 893                                 goto nla_put_failure;
 894                         i = 0;
 895                         stypes = mgmt_stypes[ift].rx;
 896                         while (stypes) {
 897                                 if (stypes & 1)
 898                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 899                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 900                                 stypes >>= 1;
 901                                 i++;
 902                         }
 903                         nla_nest_end(msg, nl_ftypes);
 904                 }
 905                 nla_nest_end(msg, nl_ifs);
 906         }
 907
 908         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 909                 struct nlattr *nl_wowlan;
 910
 911                 nl_wowlan = nla_nest_start(msg,
 912                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 913                 if (!nl_wowlan)
 914                         goto nla_put_failure;
 915
 916                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 917                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 918                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
 919                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 920                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
 921                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
 922                 if (dev->wiphy.wowlan.n_patterns) {
 923                         struct nl80211_wowlan_pattern_support pat = {
 924                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
 925                                 .min_pattern_len =
 926                                         dev->wiphy.wowlan.pattern_min_len,
 927                                 .max_pattern_len =
 928                                         dev->wiphy.wowlan.pattern_max_len,
 929                         };
 930                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 931                                 sizeof(pat), &pat);
 932                 }
 933
 934                 nla_nest_end(msg, nl_wowlan);
 935         }
 936
 937         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
 938                                 dev->wiphy.software_iftypes))
 939                 goto nla_put_failure;
 940
 941         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
 942                 goto nla_put_failure;
 943
 944         return genlmsg_end(msg, hdr);
 945
 946  nla_put_failure:
 947         genlmsg_cancel(msg, hdr);
 948         return -EMSGSIZE;
 949 }
 950
 951 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 952 {
 953         int idx = 0;
 954         int start = cb->args[0];
 955         struct cfg80211_registered_device *dev;
 956
 957         mutex_lock(&cfg80211_mutex);
 958         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 959                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 960                         continue;
 961                 if (++idx <= start)
 962                         continue;
 963                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 964                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 965                                        dev) < 0) {
 966                         idx--;
 967                         break;
 968                 }
 969         }
 970         mutex_unlock(&cfg80211_mutex);
 971
 972         cb->args[0] = idx;
 973
 974         return skb->len;
 975 }
 976
 977 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 978 {
 979         struct sk_buff *msg;
 980         struct cfg80211_registered_device *dev = info->user_ptr[0];
 981
 982         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 983         if (!msg)
 984                 return -ENOMEM;
 985
 986         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 987                 nlmsg_free(msg);
 988                 return -ENOBUFS;
 989         }
 990
 991         return genlmsg_reply(msg, info);
 992 }
 993
 994 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 995         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 996         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 997         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 998         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 999         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1000 };
1001
1002 static int parse_txq_params(struct nlattr *tb[],
1003                             struct ieee80211_txq_params *txq_params)
1004 {
1005         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1006             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1007             !tb[NL80211_TXQ_ATTR_AIFS])
1008                 return -EINVAL;
1009
1010         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1011         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1012         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1013         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1014         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1015
1016         return 0;
1017 }
1018
1019 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1020 {
1021         /*
1022          * You can only set the channel explicitly for AP, mesh
1023          * and WDS type interfaces; all others have their channel
1024          * managed via their respective "establish a connection"
1025          * command (connect, join, ...)
1026          *
1027          * Monitors are special as they are normally slaved to
1028          * whatever else is going on, so they behave as though
1029          * you tried setting the wiphy channel itself.
1030          */
1031         return !wdev ||
1032                 wdev->iftype == NL80211_IFTYPE_AP ||
1033                 wdev->iftype == NL80211_IFTYPE_WDS ||
1034                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1035                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1036                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1037 }
1038
1039 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1040                                  struct wireless_dev *wdev,
1041                                  struct genl_info *info)
1042 {
1043         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1044         u32 freq;
1045         int result;
1046
1047         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1048                 return -EINVAL;
1049
1050         if (!nl80211_can_set_dev_channel(wdev))
1051                 return -EOPNOTSUPP;
1052
1053         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1054                 channel_type = nla_get_u32(info->attrs[
1055                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1056                 if (channel_type != NL80211_CHAN_NO_HT &&
1057                     channel_type != NL80211_CHAN_HT20 &&
1058                     channel_type != NL80211_CHAN_HT40PLUS &&
1059                     channel_type != NL80211_CHAN_HT40MINUS)
1060                         return -EINVAL;
1061         }
1062
1063         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1064
1065         mutex_lock(&rdev->devlist_mtx);
1066         if (wdev) {
1067                 wdev_lock(wdev);
1068                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1069                 wdev_unlock(wdev);
1070         } else {
1071                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1072         }
1073         mutex_unlock(&rdev->devlist_mtx);
1074
1075         return result;
1076 }
1077
1078 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1079 {
1080         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1081         struct net_device *netdev = info->user_ptr[1];
1082
1083         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1084 }
1085
1086 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1087 {
1088         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1089         struct net_device *dev = info->user_ptr[1];
1090         struct wireless_dev *wdev = dev->ieee80211_ptr;
1091         const u8 *bssid;
1092
1093         if (!info->attrs[NL80211_ATTR_MAC])
1094                 return -EINVAL;
1095
1096         if (netif_running(dev))
1097                 return -EBUSY;
1098
1099         if (!rdev->ops->set_wds_peer)
1100                 return -EOPNOTSUPP;
1101
1102         if (wdev->iftype != NL80211_IFTYPE_WDS)
1103                 return -EOPNOTSUPP;
1104
1105         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1106         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1107 }
1108
1109
1110 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1111 {
1112         struct cfg80211_registered_device *rdev;
1113         struct net_device *netdev = NULL;
1114         struct wireless_dev *wdev;
1115         int result = 0, rem_txq_params = 0;
1116         struct nlattr *nl_txq_params;
1117         u32 changed;
1118         u8 retry_short = 0, retry_long = 0;
1119         u32 frag_threshold = 0, rts_threshold = 0;
1120         u8 coverage_class = 0;
1121
1122         /*
1123          * Try to find the wiphy and netdev. Normally this
1124          * function shouldn't need the netdev, but this is
1125          * done for backward compatibility -- previously
1126          * setting the channel was done per wiphy, but now
1127          * it is per netdev. Previous userland like hostapd
1128          * also passed a netdev to set_wiphy, so that it is
1129          * possible to let that go to the right netdev!
1130          */
1131         mutex_lock(&cfg80211_mutex);
1132
1133         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1134                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1135
1136                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1137                 if (netdev && netdev->ieee80211_ptr) {
1138                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1139                         mutex_lock(&rdev->mtx);
1140                 } else
1141                         netdev = NULL;
1142         }
1143
1144         if (!netdev) {
1145                 rdev = __cfg80211_rdev_from_info(info);
1146                 if (IS_ERR(rdev)) {
1147                         mutex_unlock(&cfg80211_mutex);
1148                         return PTR_ERR(rdev);
1149                 }
1150                 wdev = NULL;
1151                 netdev = NULL;
1152                 result = 0;
1153
1154                 mutex_lock(&rdev->mtx);
1155         } else if (netif_running(netdev) &&
1156                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1157                 wdev = netdev->ieee80211_ptr;
1158         else
1159                 wdev = NULL;
1160
1161         /*
1162          * end workaround code, by now the rdev is available
1163          * and locked, and wdev may or may not be NULL.
1164          */
1165
1166         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1167                 result = cfg80211_dev_rename(
1168                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1169
1170         mutex_unlock(&cfg80211_mutex);
1171
1172         if (result)
1173                 goto bad_res;
1174
1175         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1176                 struct ieee80211_txq_params txq_params;
1177                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1178
1179                 if (!rdev->ops->set_txq_params) {
1180                         result = -EOPNOTSUPP;
1181                         goto bad_res;
1182                 }
1183
1184                 nla_for_each_nested(nl_txq_params,
1185                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1186                                     rem_txq_params) {
1187                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1188                                   nla_data(nl_txq_params),
1189                                   nla_len(nl_txq_params),
1190                                   txq_params_policy);
1191                         result = parse_txq_params(tb, &txq_params);
1192                         if (result)
1193                                 goto bad_res;
1194
1195                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1196                                                            &txq_params);
1197                         if (result)
1198                                 goto bad_res;
1199                 }
1200         }
1201
1202         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1203                 result = __nl80211_set_channel(rdev, wdev, info);
1204                 if (result)
1205                         goto bad_res;
1206         }
1207
1208         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1209                 enum nl80211_tx_power_setting type;
1210                 int idx, mbm = 0;
1211
1212                 if (!rdev->ops->set_tx_power) {
1213                         result = -EOPNOTSUPP;
1214                         goto bad_res;
1215                 }
1216
1217                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1218                 type = nla_get_u32(info->attrs[idx]);
1219
1220                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1221                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1222                         result = -EINVAL;
1223                         goto bad_res;
1224                 }
1225
1226                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1227                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1228                         mbm = nla_get_u32(info->attrs[idx]);
1229                 }
1230
1231                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1232                 if (result)
1233                         goto bad_res;
1234         }
1235
1236         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1237             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1238                 u32 tx_ant, rx_ant;
1239                 if ((!rdev->wiphy.available_antennas_tx &&
1240                      !rdev->wiphy.available_antennas_rx) ||
1241                     !rdev->ops->set_antenna) {
1242                         result = -EOPNOTSUPP;
1243                         goto bad_res;
1244                 }
1245
1246                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1247                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1248
1249                 /* reject antenna configurations which don't match the
1250                  * available antenna masks, except for the "all" mask */
1251                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1252                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1253                         result = -EINVAL;
1254                         goto bad_res;
1255                 }
1256
1257                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1258                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1259
1260                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1261                 if (result)
1262                         goto bad_res;
1263         }
1264
1265         changed = 0;
1266
1267         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1268                 retry_short = nla_get_u8(
1269                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1270                 if (retry_short == 0) {
1271                         result = -EINVAL;
1272                         goto bad_res;
1273                 }
1274                 changed |= WIPHY_PARAM_RETRY_SHORT;
1275         }
1276
1277         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1278                 retry_long = nla_get_u8(
1279                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1280                 if (retry_long == 0) {
1281                         result = -EINVAL;
1282                         goto bad_res;
1283                 }
1284                 changed |= WIPHY_PARAM_RETRY_LONG;
1285         }
1286
1287         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1288                 frag_threshold = nla_get_u32(
1289                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1290                 if (frag_threshold < 256) {
1291                         result = -EINVAL;
1292                         goto bad_res;
1293                 }
1294                 if (frag_threshold != (u32) -1) {
1295                         /*
1296                          * Fragments (apart from the last one) are required to
1297                          * have even length. Make the fragmentation code
1298                          * simpler by stripping LSB should someone try to use
1299                          * odd threshold value.
1300                          */
1301                         frag_threshold &= ~0x1;
1302                 }
1303                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1304         }
1305
1306         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1307                 rts_threshold = nla_get_u32(
1308                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1309                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1310         }
1311
1312         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1313                 coverage_class = nla_get_u8(
1314                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1315                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1316         }
1317
1318         if (changed) {
1319                 u8 old_retry_short, old_retry_long;
1320                 u32 old_frag_threshold, old_rts_threshold;
1321                 u8 old_coverage_class;
1322
1323                 if (!rdev->ops->set_wiphy_params) {
1324                         result = -EOPNOTSUPP;
1325                         goto bad_res;
1326                 }
1327
1328                 old_retry_short = rdev->wiphy.retry_short;
1329                 old_retry_long = rdev->wiphy.retry_long;
1330                 old_frag_threshold = rdev->wiphy.frag_threshold;
1331                 old_rts_threshold = rdev->wiphy.rts_threshold;
1332                 old_coverage_class = rdev->wiphy.coverage_class;
1333
1334                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1335                         rdev->wiphy.retry_short = retry_short;
1336                 if (changed & WIPHY_PARAM_RETRY_LONG)
1337                         rdev->wiphy.retry_long = retry_long;
1338                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1339                         rdev->wiphy.frag_threshold = frag_threshold;
1340                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1341                         rdev->wiphy.rts_threshold = rts_threshold;
1342                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1343                         rdev->wiphy.coverage_class = coverage_class;
1344
1345                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1346                 if (result) {
1347                         rdev->wiphy.retry_short = old_retry_short;
1348                         rdev->wiphy.retry_long = old_retry_long;
1349                         rdev->wiphy.frag_threshold = old_frag_threshold;
1350                         rdev->wiphy.rts_threshold = old_rts_threshold;
1351                         rdev->wiphy.coverage_class = old_coverage_class;
1352                 }
1353         }
1354
1355  bad_res:
1356         mutex_unlock(&rdev->mtx);
1357         if (netdev)
1358                 dev_put(netdev);
1359         return result;
1360 }
1361
1362
1363 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1364                               struct cfg80211_registered_device *rdev,
1365                               struct net_device *dev)
1366 {
1367         void *hdr;
1368
1369         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1370         if (!hdr)
1371                 return -1;
1372
1373         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1374         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1375         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1376         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1377
1378         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1379                     rdev->devlist_generation ^
1380                         (cfg80211_rdev_list_generation << 2));
1381
1382         return genlmsg_end(msg, hdr);
1383
1384  nla_put_failure:
1385         genlmsg_cancel(msg, hdr);
1386         return -EMSGSIZE;
1387 }
1388
1389 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1390 {
1391         int wp_idx = 0;
1392         int if_idx = 0;
1393         int wp_start = cb->args[0];
1394         int if_start = cb->args[1];
1395         struct cfg80211_registered_device *rdev;
1396         struct wireless_dev *wdev;
1397
1398         mutex_lock(&cfg80211_mutex);
1399         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1400                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1401                         continue;
1402                 if (wp_idx < wp_start) {
1403                         wp_idx++;
1404                         continue;
1405                 }
1406                 if_idx = 0;
1407
1408                 mutex_lock(&rdev->devlist_mtx);
1409                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1410                         if (if_idx < if_start) {
1411                                 if_idx++;
1412                                 continue;
1413                         }
1414                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1415                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1416                                                rdev, wdev->netdev) < 0) {
1417                                 mutex_unlock(&rdev->devlist_mtx);
1418                                 goto out;
1419                         }
1420                         if_idx++;
1421                 }
1422                 mutex_unlock(&rdev->devlist_mtx);
1423
1424                 wp_idx++;
1425         }
1426  out:
1427         mutex_unlock(&cfg80211_mutex);
1428
1429         cb->args[0] = wp_idx;
1430         cb->args[1] = if_idx;
1431
1432         return skb->len;
1433 }
1434
1435 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1436 {
1437         struct sk_buff *msg;
1438         struct cfg80211_registered_device *dev = info->user_ptr[0];
1439         struct net_device *netdev = info->user_ptr[1];
1440
1441         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1442         if (!msg)
1443                 return -ENOMEM;
1444
1445         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1446                                dev, netdev) < 0) {
1447                 nlmsg_free(msg);
1448                 return -ENOBUFS;
1449         }
1450
1451         return genlmsg_reply(msg, info);
1452 }
1453
1454 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1455         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1456         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1457         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1458         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1459         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1460 };
1461
1462 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1463 {
1464         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1465         int flag;
1466
1467         *mntrflags = 0;
1468
1469         if (!nla)
1470                 return -EINVAL;
1471
1472         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1473                              nla, mntr_flags_policy))
1474                 return -EINVAL;
1475
1476         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1477                 if (flags[flag])
1478                         *mntrflags |= (1<<flag);
1479
1480         return 0;
1481 }
1482
1483 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1484                                struct net_device *netdev, u8 use_4addr,
1485                                enum nl80211_iftype iftype)
1486 {
1487         if (!use_4addr) {
1488                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1489                         return -EBUSY;
1490                 return 0;
1491         }
1492
1493         switch (iftype) {
1494         case NL80211_IFTYPE_AP_VLAN:
1495                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1496                         return 0;
1497                 break;
1498         case NL80211_IFTYPE_STATION:
1499                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1500                         return 0;
1501                 break;
1502         default:
1503                 break;
1504         }
1505
1506         return -EOPNOTSUPP;
1507 }
1508
1509 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1510 {
1511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1512         struct vif_params params;
1513         int err;
1514         enum nl80211_iftype otype, ntype;
1515         struct net_device *dev = info->user_ptr[1];
1516         u32 _flags, *flags = NULL;
1517         bool change = false;
1518
1519         memset(&params, 0, sizeof(params));
1520
1521         otype = ntype = dev->ieee80211_ptr->iftype;
1522
1523         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1524                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1525                 if (otype != ntype)
1526                         change = true;
1527                 if (ntype > NL80211_IFTYPE_MAX)
1528                         return -EINVAL;
1529         }
1530
1531         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1532                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1533
1534                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1535                         return -EINVAL;
1536                 if (netif_running(dev))
1537                         return -EBUSY;
1538
1539                 wdev_lock(wdev);
1540                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1541                              IEEE80211_MAX_MESH_ID_LEN);
1542                 wdev->mesh_id_up_len =
1543                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1544                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1545                        wdev->mesh_id_up_len);
1546                 wdev_unlock(wdev);
1547         }
1548
1549         if (info->attrs[NL80211_ATTR_4ADDR]) {
1550                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1551                 change = true;
1552                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1553                 if (err)
1554                         return err;
1555         } else {
1556                 params.use_4addr = -1;
1557         }
1558
1559         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1560                 if (ntype != NL80211_IFTYPE_MONITOR)
1561                         return -EINVAL;
1562                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1563                                           &_flags);
1564                 if (err)
1565                         return err;
1566
1567                 flags = &_flags;
1568                 change = true;
1569         }
1570
1571         if (change)
1572                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1573         else
1574                 err = 0;
1575
1576         if (!err && params.use_4addr != -1)
1577                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1578
1579         return err;
1580 }
1581
1582 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1583 {
1584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1585         struct vif_params params;
1586         struct net_device *dev;
1587         int err;
1588         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1589         u32 flags;
1590
1591         memset(&params, 0, sizeof(params));
1592
1593         if (!info->attrs[NL80211_ATTR_IFNAME])
1594                 return -EINVAL;
1595
1596         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1597                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1598                 if (type > NL80211_IFTYPE_MAX)
1599                         return -EINVAL;
1600         }
1601
1602         if (!rdev->ops->add_virtual_intf ||
1603             !(rdev->wiphy.interface_modes & (1 << type)))
1604                 return -EOPNOTSUPP;
1605
1606         if (info->attrs[NL80211_ATTR_4ADDR]) {
1607                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1608                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1609                 if (err)
1610                         return err;
1611         }
1612
1613         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1614                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1615                                   &flags);
1616         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1617                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1618                 type, err ? NULL : &flags, &params);
1619         if (IS_ERR(dev))
1620                 return PTR_ERR(dev);
1621
1622         if (type == NL80211_IFTYPE_MESH_POINT &&
1623             info->attrs[NL80211_ATTR_MESH_ID]) {
1624                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1625
1626                 wdev_lock(wdev);
1627                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1628                              IEEE80211_MAX_MESH_ID_LEN);
1629                 wdev->mesh_id_up_len =
1630                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1631                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1632                        wdev->mesh_id_up_len);
1633                 wdev_unlock(wdev);
1634         }
1635
1636         return 0;
1637 }
1638
1639 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1640 {
1641         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1642         struct net_device *dev = info->user_ptr[1];
1643
1644         if (!rdev->ops->del_virtual_intf)
1645                 return -EOPNOTSUPP;
1646
1647         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1648 }
1649
1650 struct get_key_cookie {
1651         struct sk_buff *msg;
1652         int error;
1653         int idx;
1654 };
1655
1656 static void get_key_callback(void *c, struct key_params *params)
1657 {
1658         struct nlattr *key;
1659         struct get_key_cookie *cookie = c;
1660
1661         if (params->key)
1662                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1663                         params->key_len, params->key);
1664
1665         if (params->seq)
1666                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1667                         params->seq_len, params->seq);
1668
1669         if (params->cipher)
1670                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1671                             params->cipher);
1672
1673         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1674         if (!key)
1675                 goto nla_put_failure;
1676
1677         if (params->key)
1678                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1679                         params->key_len, params->key);
1680
1681         if (params->seq)
1682                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1683                         params->seq_len, params->seq);
1684
1685         if (params->cipher)
1686                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1687                             params->cipher);
1688
1689         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1690
1691         nla_nest_end(cookie->msg, key);
1692
1693         return;
1694  nla_put_failure:
1695         cookie->error = 1;
1696 }
1697
1698 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1699 {
1700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1701         int err;
1702         struct net_device *dev = info->user_ptr[1];
1703         u8 key_idx = 0;
1704         const u8 *mac_addr = NULL;
1705         bool pairwise;
1706         struct get_key_cookie cookie = {
1707                 .error = 0,
1708         };
1709         void *hdr;
1710         struct sk_buff *msg;
1711
1712         if (info->attrs[NL80211_ATTR_KEY_IDX])
1713                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1714
1715         if (key_idx > 5)
1716                 return -EINVAL;
1717
1718         if (info->attrs[NL80211_ATTR_MAC])
1719                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1720
1721         pairwise = !!mac_addr;
1722         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1723                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1724                 if (kt >= NUM_NL80211_KEYTYPES)
1725                         return -EINVAL;
1726                 if (kt != NL80211_KEYTYPE_GROUP &&
1727                     kt != NL80211_KEYTYPE_PAIRWISE)
1728                         return -EINVAL;
1729                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1730         }
1731
1732         if (!rdev->ops->get_key)
1733                 return -EOPNOTSUPP;
1734
1735         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1736         if (!msg)
1737                 return -ENOMEM;
1738
1739         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1740                              NL80211_CMD_NEW_KEY);
1741         if (IS_ERR(hdr))
1742                 return PTR_ERR(hdr);
1743
1744         cookie.msg = msg;
1745         cookie.idx = key_idx;
1746
1747         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1748         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1749         if (mac_addr)
1750                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1751
1752         if (pairwise && mac_addr &&
1753             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1754                 return -ENOENT;
1755
1756         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1757                                  mac_addr, &cookie, get_key_callback);
1758
1759         if (err)
1760                 goto free_msg;
1761
1762         if (cookie.error)
1763                 goto nla_put_failure;
1764
1765         genlmsg_end(msg, hdr);
1766         return genlmsg_reply(msg, info);
1767
1768  nla_put_failure:
1769         err = -ENOBUFS;
1770  free_msg:
1771         nlmsg_free(msg);
1772         return err;
1773 }
1774
1775 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1776 {
1777         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1778         struct key_parse key;
1779         int err;
1780         struct net_device *dev = info->user_ptr[1];
1781
1782         err = nl80211_parse_key(info, &key);
1783         if (err)
1784                 return err;
1785
1786         if (key.idx < 0)
1787                 return -EINVAL;
1788
1789         /* only support setting default key */
1790         if (!key.def && !key.defmgmt)
1791                 return -EINVAL;
1792
1793         wdev_lock(dev->ieee80211_ptr);
1794
1795         if (key.def) {
1796                 if (!rdev->ops->set_default_key) {
1797                         err = -EOPNOTSUPP;
1798                         goto out;
1799                 }
1800
1801                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1802                 if (err)
1803                         goto out;
1804
1805                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1806                                                  key.def_uni, key.def_multi);
1807
1808                 if (err)
1809                         goto out;
1810
1811 #ifdef CONFIG_CFG80211_WEXT
1812                 dev->ieee80211_ptr->wext.default_key = key.idx;
1813 #endif
1814         } else {
1815                 if (key.def_uni || !key.def_multi) {
1816                         err = -EINVAL;
1817                         goto out;
1818                 }
1819
1820                 if (!rdev->ops->set_default_mgmt_key) {
1821                         err = -EOPNOTSUPP;
1822                         goto out;
1823                 }
1824
1825                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1826                 if (err)
1827                         goto out;
1828
1829                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1830                                                       dev, key.idx);
1831                 if (err)
1832                         goto out;
1833
1834 #ifdef CONFIG_CFG80211_WEXT
1835                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1836 #endif
1837         }
1838
1839  out:
1840         wdev_unlock(dev->ieee80211_ptr);
1841
1842         return err;
1843 }
1844
1845 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1846 {
1847         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1848         int err;
1849         struct net_device *dev = info->user_ptr[1];
1850         struct key_parse key;
1851         const u8 *mac_addr = NULL;
1852
1853         err = nl80211_parse_key(info, &key);
1854         if (err)
1855                 return err;
1856
1857         if (!key.p.key)
1858                 return -EINVAL;
1859
1860         if (info->attrs[NL80211_ATTR_MAC])
1861                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1862
1863         if (key.type == -1) {
1864                 if (mac_addr)
1865                         key.type = NL80211_KEYTYPE_PAIRWISE;
1866                 else
1867                         key.type = NL80211_KEYTYPE_GROUP;
1868         }
1869
1870         /* for now */
1871         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1872             key.type != NL80211_KEYTYPE_GROUP)
1873                 return -EINVAL;
1874
1875         if (!rdev->ops->add_key)
1876                 return -EOPNOTSUPP;
1877
1878         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1879                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1880                                            mac_addr))
1881                 return -EINVAL;
1882
1883         wdev_lock(dev->ieee80211_ptr);
1884         err = nl80211_key_allowed(dev->ieee80211_ptr);
1885         if (!err)
1886                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1887                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1888                                          mac_addr, &key.p);
1889         wdev_unlock(dev->ieee80211_ptr);
1890
1891         return err;
1892 }
1893
1894 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1895 {
1896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1897         int err;
1898         struct net_device *dev = info->user_ptr[1];
1899         u8 *mac_addr = NULL;
1900         struct key_parse key;
1901
1902         err = nl80211_parse_key(info, &key);
1903         if (err)
1904                 return err;
1905
1906         if (info->attrs[NL80211_ATTR_MAC])
1907                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1908
1909         if (key.type == -1) {
1910                 if (mac_addr)
1911                         key.type = NL80211_KEYTYPE_PAIRWISE;
1912                 else
1913                         key.type = NL80211_KEYTYPE_GROUP;
1914         }
1915
1916         /* for now */
1917         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1918             key.type != NL80211_KEYTYPE_GROUP)
1919                 return -EINVAL;
1920
1921         if (!rdev->ops->del_key)
1922                 return -EOPNOTSUPP;
1923
1924         wdev_lock(dev->ieee80211_ptr);
1925         err = nl80211_key_allowed(dev->ieee80211_ptr);
1926
1927         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1928             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1929                 err = -ENOENT;
1930
1931         if (!err)
1932                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1933                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1934                                          mac_addr);
1935
1936 #ifdef CONFIG_CFG80211_WEXT
1937         if (!err) {
1938                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1939                         dev->ieee80211_ptr->wext.default_key = -1;
1940                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1941                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1942         }
1943 #endif
1944         wdev_unlock(dev->ieee80211_ptr);
1945
1946         return err;
1947 }
1948
1949 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1950 {
1951         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1952                     struct beacon_parameters *info);
1953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1954         struct net_device *dev = info->user_ptr[1];
1955         struct wireless_dev *wdev = dev->ieee80211_ptr;
1956         struct beacon_parameters params;
1957         int haveinfo = 0, err;
1958
1959         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1960                 return -EINVAL;
1961
1962         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1963             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1964                 return -EOPNOTSUPP;
1965
1966         memset(&params, 0, sizeof(params));
1967
1968         switch (info->genlhdr->cmd) {
1969         case NL80211_CMD_NEW_BEACON:
1970                 /* these are required for NEW_BEACON */
1971                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1972                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1973                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1974                         return -EINVAL;
1975
1976                 params.interval =
1977                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1978                 params.dtim_period =
1979                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1980
1981                 err = cfg80211_validate_beacon_int(rdev, params.interval);
1982                 if (err)
1983                         return err;
1984
1985                 call = rdev->ops->add_beacon;
1986                 break;
1987         case NL80211_CMD_SET_BEACON:
1988                 call = rdev->ops->set_beacon;
1989                 break;
1990         default:
1991                 WARN_ON(1);
1992                 return -EOPNOTSUPP;
1993         }
1994
1995         if (!call)
1996                 return -EOPNOTSUPP;
1997
1998         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1999                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2000                 params.head_len =
2001                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2002                 haveinfo = 1;
2003         }
2004
2005         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2006                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2007                 params.tail_len =
2008                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2009                 haveinfo = 1;
2010         }
2011
2012         if (!haveinfo)
2013                 return -EINVAL;
2014
2015         err = call(&rdev->wiphy, dev, &params);
2016         if (!err && params.interval)
2017                 wdev->beacon_interval = params.interval;
2018         return err;
2019 }
2020
2021 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
2022 {
2023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2024         struct net_device *dev = info->user_ptr[1];
2025         struct wireless_dev *wdev = dev->ieee80211_ptr;
2026         int err;
2027
2028         if (!rdev->ops->del_beacon)
2029                 return -EOPNOTSUPP;
2030
2031         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2032             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2033                 return -EOPNOTSUPP;
2034
2035         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
2036         if (!err)
2037                 wdev->beacon_interval = 0;
2038         return err;
2039 }
2040
2041 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2042         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2043         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2044         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2045         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2046         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2047 };
2048
2049 static int parse_station_flags(struct genl_info *info,
2050                                struct station_parameters *params)
2051 {
2052         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2053         struct nlattr *nla;
2054         int flag;
2055
2056         /*
2057          * Try parsing the new attribute first so userspace
2058          * can specify both for older kernels.
2059          */
2060         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2061         if (nla) {
2062                 struct nl80211_sta_flag_update *sta_flags;
2063
2064                 sta_flags = nla_data(nla);
2065                 params->sta_flags_mask = sta_flags->mask;
2066                 params->sta_flags_set = sta_flags->set;
2067                 if ((params->sta_flags_mask |
2068                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2069                         return -EINVAL;
2070                 return 0;
2071         }
2072
2073         /* if present, parse the old attribute */
2074
2075         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2076         if (!nla)
2077                 return 0;
2078
2079         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2080                              nla, sta_flags_policy))
2081                 return -EINVAL;
2082
2083         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
2084         params->sta_flags_mask &= ~1;
2085
2086         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2087                 if (flags[flag])
2088                         params->sta_flags_set |= (1<<flag);
2089
2090         return 0;
2091 }
2092
2093 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2094                                  int attr)
2095 {
2096         struct nlattr *rate;
2097         u16 bitrate;
2098
2099         rate = nla_nest_start(msg, attr);
2100         if (!rate)
2101                 goto nla_put_failure;
2102
2103         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2104         bitrate = cfg80211_calculate_bitrate(info);
2105         if (bitrate > 0)
2106                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2107
2108         if (info->flags & RATE_INFO_FLAGS_MCS)
2109                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2110         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2111                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2112         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2113                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2114
2115         nla_nest_end(msg, rate);
2116         return true;
2117
2118 nla_put_failure:
2119         return false;
2120 }
2121
2122 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2123                                 int flags, struct net_device *dev,
2124                                 const u8 *mac_addr, struct station_info *sinfo)
2125 {
2126         void *hdr;
2127         struct nlattr *sinfoattr, *bss_param;
2128
2129         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2130         if (!hdr)
2131                 return -1;
2132
2133         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2134         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2135
2136         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2137
2138         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2139         if (!sinfoattr)
2140                 goto nla_put_failure;
2141         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2142                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2143                             sinfo->connected_time);
2144         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2145                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2146                             sinfo->inactive_time);
2147         if (sinfo->filled & STATION_INFO_RX_BYTES)
2148                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2149                             sinfo->rx_bytes);
2150         if (sinfo->filled & STATION_INFO_TX_BYTES)
2151                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2152                             sinfo->tx_bytes);
2153         if (sinfo->filled & STATION_INFO_LLID)
2154                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2155                             sinfo->llid);
2156         if (sinfo->filled & STATION_INFO_PLID)
2157                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2158                             sinfo->plid);
2159         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2160                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2161                             sinfo->plink_state);
2162         if (sinfo->filled & STATION_INFO_SIGNAL)
2163                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2164                            sinfo->signal);
2165         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2166                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2167                            sinfo->signal_avg);
2168         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2169                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2170                                           NL80211_STA_INFO_TX_BITRATE))
2171                         goto nla_put_failure;
2172         }
2173         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2174                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2175                                           NL80211_STA_INFO_RX_BITRATE))
2176                         goto nla_put_failure;
2177         }
2178         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2179                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2180                             sinfo->rx_packets);
2181         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2182                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2183                             sinfo->tx_packets);
2184         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2185                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2186                             sinfo->tx_retries);
2187         if (sinfo->filled & STATION_INFO_TX_FAILED)
2188                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2189                             sinfo->tx_failed);
2190         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2191                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2192                 if (!bss_param)
2193                         goto nla_put_failure;
2194
2195                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2196                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2197                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2198                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2199                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2200                         NLA_PUT_FLAG(msg,
2201                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2202                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2203                            sinfo->bss_param.dtim_period);
2204                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2205                             sinfo->bss_param.beacon_interval);
2206
2207                 nla_nest_end(msg, bss_param);
2208         }
2209         nla_nest_end(msg, sinfoattr);
2210
2211         return genlmsg_end(msg, hdr);
2212
2213  nla_put_failure:
2214         genlmsg_cancel(msg, hdr);
2215         return -EMSGSIZE;
2216 }
2217
2218 static int nl80211_dump_station(struct sk_buff *skb,
2219                                 struct netlink_callback *cb)
2220 {
2221         struct station_info sinfo;
2222         struct cfg80211_registered_device *dev;
2223         struct net_device *netdev;
2224         u8 mac_addr[ETH_ALEN];
2225         int sta_idx = cb->args[1];
2226         int err;
2227
2228         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2229         if (err)
2230                 return err;
2231
2232         if (!dev->ops->dump_station) {
2233                 err = -EOPNOTSUPP;
2234                 goto out_err;
2235         }
2236
2237         while (1) {
2238                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2239                                              mac_addr, &sinfo);
2240                 if (err == -ENOENT)
2241                         break;
2242                 if (err)
2243                         goto out_err;
2244
2245                 if (nl80211_send_station(skb,
2246                                 NETLINK_CB(cb->skb).pid,
2247                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2248                                 netdev, mac_addr,
2249                                 &sinfo) < 0)
2250                         goto out;
2251
2252                 sta_idx++;
2253         }
2254
2255
2256  out:
2257         cb->args[1] = sta_idx;
2258         err = skb->len;
2259  out_err:
2260         nl80211_finish_netdev_dump(dev);
2261
2262         return err;
2263 }
2264
2265 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2266 {
2267         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2268         struct net_device *dev = info->user_ptr[1];
2269         struct station_info sinfo;
2270         struct sk_buff *msg;
2271         u8 *mac_addr = NULL;
2272         int err;
2273
2274         memset(&sinfo, 0, sizeof(sinfo));
2275
2276         if (!info->attrs[NL80211_ATTR_MAC])
2277                 return -EINVAL;
2278
2279         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2280
2281         if (!rdev->ops->get_station)
2282                 return -EOPNOTSUPP;
2283
2284         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2285         if (err)
2286                 return err;
2287
2288         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2289         if (!msg)
2290                 return -ENOMEM;
2291
2292         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2293                                  dev, mac_addr, &sinfo) < 0) {
2294                 nlmsg_free(msg);
2295                 return -ENOBUFS;
2296         }
2297
2298         return genlmsg_reply(msg, info);
2299 }
2300
2301 /*
2302  * Get vlan interface making sure it is running and on the right wiphy.
2303  */
2304 static int get_vlan(struct genl_info *info,
2305                     struct cfg80211_registered_device *rdev,
2306                     struct net_device **vlan)
2307 {
2308         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2309         *vlan = NULL;
2310
2311         if (vlanattr) {
2312                 *vlan = dev_get_by_index(genl_info_net(info),
2313                                          nla_get_u32(vlanattr));
2314                 if (!*vlan)
2315                         return -ENODEV;
2316                 if (!(*vlan)->ieee80211_ptr)
2317                         return -EINVAL;
2318                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2319                         return -EINVAL;
2320                 if (!netif_running(*vlan))
2321                         return -ENETDOWN;
2322         }
2323         return 0;
2324 }
2325
2326 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2327 {
2328         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2329         int err;
2330         struct net_device *dev = info->user_ptr[1];
2331         struct station_parameters params;
2332         u8 *mac_addr = NULL;
2333
2334         memset(&params, 0, sizeof(params));
2335
2336         params.listen_interval = -1;
2337         params.plink_state = -1;
2338
2339         if (info->attrs[NL80211_ATTR_STA_AID])
2340                 return -EINVAL;
2341
2342         if (!info->attrs[NL80211_ATTR_MAC])
2343                 return -EINVAL;
2344
2345         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2346
2347         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2348                 params.supported_rates =
2349                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2350                 params.supported_rates_len =
2351                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2352         }
2353
2354         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2355                 params.listen_interval =
2356                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2357
2358         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2359                 params.ht_capa =
2360                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2361
2362         if (parse_station_flags(info, &params))
2363                 return -EINVAL;
2364
2365         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2366                 params.plink_action =
2367                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2368
2369         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2370                 params.plink_state =
2371                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2372
2373         err = get_vlan(info, rdev, &params.vlan);
2374         if (err)
2375                 goto out;
2376
2377         /* validate settings */
2378         err = 0;
2379
2380         switch (dev->ieee80211_ptr->iftype) {
2381         case NL80211_IFTYPE_AP:
2382         case NL80211_IFTYPE_AP_VLAN:
2383         case NL80211_IFTYPE_P2P_GO:
2384                 /* disallow mesh-specific things */
2385                 if (params.plink_action)
2386                         err = -EINVAL;
2387                 break;
2388         case NL80211_IFTYPE_P2P_CLIENT:
2389         case NL80211_IFTYPE_STATION:
2390                 /* disallow everything but AUTHORIZED flag */
2391                 if (params.plink_action)
2392                         err = -EINVAL;
2393                 if (params.vlan)
2394                         err = -EINVAL;
2395                 if (params.supported_rates)
2396                         err = -EINVAL;
2397                 if (params.ht_capa)
2398                         err = -EINVAL;
2399                 if (params.listen_interval >= 0)
2400                         err = -EINVAL;
2401                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2402                         err = -EINVAL;
2403                 break;
2404         case NL80211_IFTYPE_MESH_POINT:
2405                 /* disallow things mesh doesn't support */
2406                 if (params.vlan)
2407                         err = -EINVAL;
2408                 if (params.ht_capa)
2409                         err = -EINVAL;
2410                 if (params.listen_interval >= 0)
2411                         err = -EINVAL;
2412                 if (params.sta_flags_mask &
2413                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2414                                   BIT(NL80211_STA_FLAG_MFP) |
2415                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2416                         err = -EINVAL;
2417                 break;
2418         default:
2419                 err = -EINVAL;
2420         }
2421
2422         if (err)
2423                 goto out;
2424
2425         if (!rdev->ops->change_station) {
2426                 err = -EOPNOTSUPP;
2427                 goto out;
2428         }
2429
2430         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2431
2432  out:
2433         if (params.vlan)
2434                 dev_put(params.vlan);
2435
2436         return err;
2437 }
2438
2439 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2440 {
2441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2442         int err;
2443         struct net_device *dev = info->user_ptr[1];
2444         struct station_parameters params;
2445         u8 *mac_addr = NULL;
2446
2447         memset(&params, 0, sizeof(params));
2448
2449         if (!info->attrs[NL80211_ATTR_MAC])
2450                 return -EINVAL;
2451
2452         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2453                 return -EINVAL;
2454
2455         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2456                 return -EINVAL;
2457
2458         if (!info->attrs[NL80211_ATTR_STA_AID])
2459                 return -EINVAL;
2460
2461         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2462         params.supported_rates =
2463                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2464         params.supported_rates_len =
2465                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2466         params.listen_interval =
2467                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2468
2469         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2470         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2471                 return -EINVAL;
2472
2473         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2474                 params.ht_capa =
2475                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2476
2477         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2478                 params.plink_action =
2479                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2480
2481         if (parse_station_flags(info, &params))
2482                 return -EINVAL;
2483
2484         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2485             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2486             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2487             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2488                 return -EINVAL;
2489
2490         err = get_vlan(info, rdev, &params.vlan);
2491         if (err)
2492                 goto out;
2493
2494         /* validate settings */
2495         err = 0;
2496
2497         if (!rdev->ops->add_station) {
2498                 err = -EOPNOTSUPP;
2499                 goto out;
2500         }
2501
2502         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2503
2504  out:
2505         if (params.vlan)
2506                 dev_put(params.vlan);
2507         return err;
2508 }
2509
2510 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2511 {
2512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2513         struct net_device *dev = info->user_ptr[1];
2514         u8 *mac_addr = NULL;
2515
2516         if (info->attrs[NL80211_ATTR_MAC])
2517                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2518
2519         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2520             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2521             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2522             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2523                 return -EINVAL;
2524
2525         if (!rdev->ops->del_station)
2526                 return -EOPNOTSUPP;
2527
2528         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2529 }
2530
2531 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2532                                 int flags, struct net_device *dev,
2533                                 u8 *dst, u8 *next_hop,
2534                                 struct mpath_info *pinfo)
2535 {
2536         void *hdr;
2537         struct nlattr *pinfoattr;
2538
2539         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2540         if (!hdr)
2541                 return -1;
2542
2543         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2544         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2545         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2546
2547         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2548
2549         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2550         if (!pinfoattr)
2551                 goto nla_put_failure;
2552         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2553                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2554                             pinfo->frame_qlen);
2555         if (pinfo->filled & MPATH_INFO_SN)
2556                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2557                             pinfo->sn);
2558         if (pinfo->filled & MPATH_INFO_METRIC)
2559                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2560                             pinfo->metric);
2561         if (pinfo->filled & MPATH_INFO_EXPTIME)
2562                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2563                             pinfo->exptime);
2564         if (pinfo->filled & MPATH_INFO_FLAGS)
2565                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2566                             pinfo->flags);
2567         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2568                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2569                             pinfo->discovery_timeout);
2570         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2571                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2572                             pinfo->discovery_retries);
2573
2574         nla_nest_end(msg, pinfoattr);
2575
2576         return genlmsg_end(msg, hdr);
2577
2578  nla_put_failure:
2579         genlmsg_cancel(msg, hdr);
2580         return -EMSGSIZE;
2581 }
2582
2583 static int nl80211_dump_mpath(struct sk_buff *skb,
2584                               struct netlink_callback *cb)
2585 {
2586         struct mpath_info pinfo;
2587         struct cfg80211_registered_device *dev;
2588         struct net_device *netdev;
2589         u8 dst[ETH_ALEN];
2590         u8 next_hop[ETH_ALEN];
2591         int path_idx = cb->args[1];
2592         int err;
2593
2594         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2595         if (err)
2596                 return err;
2597
2598         if (!dev->ops->dump_mpath) {
2599                 err = -EOPNOTSUPP;
2600                 goto out_err;
2601         }
2602
2603         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2604                 err = -EOPNOTSUPP;
2605                 goto out_err;
2606         }
2607
2608         while (1) {
2609                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2610                                            dst, next_hop, &pinfo);
2611                 if (err == -ENOENT)
2612                         break;
2613                 if (err)
2614                         goto out_err;
2615
2616                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2617                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2618                                        netdev, dst, next_hop,
2619                                        &pinfo) < 0)
2620                         goto out;
2621
2622                 path_idx++;
2623         }
2624
2625
2626  out:
2627         cb->args[1] = path_idx;
2628         err = skb->len;
2629  out_err:
2630         nl80211_finish_netdev_dump(dev);
2631         return err;
2632 }
2633
2634 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2635 {
2636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2637         int err;
2638         struct net_device *dev = info->user_ptr[1];
2639         struct mpath_info pinfo;
2640         struct sk_buff *msg;
2641         u8 *dst = NULL;
2642         u8 next_hop[ETH_ALEN];
2643
2644         memset(&pinfo, 0, sizeof(pinfo));
2645
2646         if (!info->attrs[NL80211_ATTR_MAC])
2647                 return -EINVAL;
2648
2649         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2650
2651         if (!rdev->ops->get_mpath)
2652                 return -EOPNOTSUPP;
2653
2654         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2655                 return -EOPNOTSUPP;
2656
2657         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2658         if (err)
2659                 return err;
2660
2661         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2662         if (!msg)
2663                 return -ENOMEM;
2664
2665         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2666                                  dev, dst, next_hop, &pinfo) < 0) {
2667                 nlmsg_free(msg);
2668                 return -ENOBUFS;
2669         }
2670
2671         return genlmsg_reply(msg, info);
2672 }
2673
2674 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2675 {
2676         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2677         struct net_device *dev = info->user_ptr[1];
2678         u8 *dst = NULL;
2679         u8 *next_hop = NULL;
2680
2681         if (!info->attrs[NL80211_ATTR_MAC])
2682                 return -EINVAL;
2683
2684         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2685                 return -EINVAL;
2686
2687         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2688         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2689
2690         if (!rdev->ops->change_mpath)
2691                 return -EOPNOTSUPP;
2692
2693         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2694                 return -EOPNOTSUPP;
2695
2696         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2697 }
2698
2699 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2700 {
2701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2702         struct net_device *dev = info->user_ptr[1];
2703         u8 *dst = NULL;
2704         u8 *next_hop = NULL;
2705
2706         if (!info->attrs[NL80211_ATTR_MAC])
2707                 return -EINVAL;
2708
2709         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2710                 return -EINVAL;
2711
2712         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2713         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2714
2715         if (!rdev->ops->add_mpath)
2716                 return -EOPNOTSUPP;
2717
2718         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2719                 return -EOPNOTSUPP;
2720
2721         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2722 }
2723
2724 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2725 {
2726         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2727         struct net_device *dev = info->user_ptr[1];
2728         u8 *dst = NULL;
2729
2730         if (info->attrs[NL80211_ATTR_MAC])
2731                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2732
2733         if (!rdev->ops->del_mpath)
2734                 return -EOPNOTSUPP;
2735
2736         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2737 }
2738
2739 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2740 {
2741         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2742         struct net_device *dev = info->user_ptr[1];
2743         struct bss_parameters params;
2744
2745         memset(&params, 0, sizeof(params));
2746         /* default to not changing parameters */
2747         params.use_cts_prot = -1;
2748         params.use_short_preamble = -1;
2749         params.use_short_slot_time = -1;
2750         params.ap_isolate = -1;
2751         params.ht_opmode = -1;
2752
2753         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2754                 params.use_cts_prot =
2755                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2756         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2757                 params.use_short_preamble =
2758                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2759         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2760                 params.use_short_slot_time =
2761                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2762         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2763                 params.basic_rates =
2764                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2765                 params.basic_rates_len =
2766                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2767         }
2768         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2769                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2770         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2771                 params.ht_opmode =
2772                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2773
2774         if (!rdev->ops->change_bss)
2775                 return -EOPNOTSUPP;
2776
2777         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2778             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2779                 return -EOPNOTSUPP;
2780
2781         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2782 }
2783
2784 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2785         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2786         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2787         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2788         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2789         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2790         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2791 };
2792
2793 static int parse_reg_rule(struct nlattr *tb[],
2794         struct ieee80211_reg_rule *reg_rule)
2795 {
2796         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2797         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2798
2799         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2800                 return -EINVAL;
2801         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2802                 return -EINVAL;
2803         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2804                 return -EINVAL;
2805         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2806                 return -EINVAL;
2807         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2808                 return -EINVAL;
2809
2810         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2811
2812         freq_range->start_freq_khz =
2813                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2814         freq_range->end_freq_khz =
2815                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2816         freq_range->max_bandwidth_khz =
2817                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2818
2819         power_rule->max_eirp =
2820                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2821
2822         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2823                 power_rule->max_antenna_gain =
2824                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2825
2826         return 0;
2827 }
2828
2829 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2830 {
2831         int r;
2832         char *data = NULL;
2833
2834         /*
2835          * You should only get this when cfg80211 hasn't yet initialized
2836          * completely when built-in to the kernel right between the time
2837          * window between nl80211_init() and regulatory_init(), if that is
2838          * even possible.
2839          */
2840         mutex_lock(&cfg80211_mutex);
2841         if (unlikely(!cfg80211_regdomain)) {
2842                 mutex_unlock(&cfg80211_mutex);
2843                 return -EINPROGRESS;
2844         }
2845         mutex_unlock(&cfg80211_mutex);
2846
2847         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2848                 return -EINVAL;
2849
2850         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2851
2852         r = regulatory_hint_user(data);
2853
2854         return r;
2855 }
2856
2857 static int nl80211_get_mesh_config(struct sk_buff *skb,
2858                                    struct genl_info *info)
2859 {
2860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2861         struct net_device *dev = info->user_ptr[1];
2862         struct wireless_dev *wdev = dev->ieee80211_ptr;
2863         struct mesh_config cur_params;
2864         int err = 0;
2865         void *hdr;
2866         struct nlattr *pinfoattr;
2867         struct sk_buff *msg;
2868
2869         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2870                 return -EOPNOTSUPP;
2871
2872         if (!rdev->ops->get_mesh_config)
2873                 return -EOPNOTSUPP;
2874
2875         wdev_lock(wdev);
2876         /* If not connected, get default parameters */
2877         if (!wdev->mesh_id_len)
2878                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2879         else
2880                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
2881                                                  &cur_params);
2882         wdev_unlock(wdev);
2883
2884         if (err)
2885                 return err;
2886
2887         /* Draw up a netlink message to send back */
2888         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2889         if (!msg)
2890                 return -ENOMEM;
2891         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2892                              NL80211_CMD_GET_MESH_CONFIG);
2893         if (!hdr)
2894                 goto out;
2895         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
2896         if (!pinfoattr)
2897                 goto nla_put_failure;
2898         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2899         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2900                         cur_params.dot11MeshRetryTimeout);
2901         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2902                         cur_params.dot11MeshConfirmTimeout);
2903         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2904                         cur_params.dot11MeshHoldingTimeout);
2905         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2906                         cur_params.dot11MeshMaxPeerLinks);
2907         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2908                         cur_params.dot11MeshMaxRetries);
2909         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2910                         cur_params.dot11MeshTTL);
2911         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2912                         cur_params.element_ttl);
2913         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2914                         cur_params.auto_open_plinks);
2915         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2916                         cur_params.dot11MeshHWMPmaxPREQretries);
2917         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2918                         cur_params.path_refresh_time);
2919         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2920                         cur_params.min_discovery_timeout);
2921         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2922                         cur_params.dot11MeshHWMPactivePathTimeout);
2923         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2924                         cur_params.dot11MeshHWMPpreqMinInterval);
2925         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2926                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2927         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2928                         cur_params.dot11MeshHWMPRootMode);
2929         nla_nest_end(msg, pinfoattr);
2930         genlmsg_end(msg, hdr);
2931         return genlmsg_reply(msg, info);
2932
2933  nla_put_failure:
2934         genlmsg_cancel(msg, hdr);
2935  out:
2936         nlmsg_free(msg);
2937         return -ENOBUFS;
2938 }
2939
2940 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2941         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2942         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2943         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2944         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2945         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2946         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2947         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2948         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2949
2950         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2951         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2952         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2953         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2954         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2955         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2956 };
2957
2958 static const struct nla_policy
2959         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
2960         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
2961         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
2962         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
2963         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
2964                 .len = IEEE80211_MAX_DATA_LEN },
2965         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
2966 };
2967
2968 static int nl80211_parse_mesh_config(struct genl_info *info,
2969                                      struct mesh_config *cfg,
2970                                      u32 *mask_out)
2971 {
2972         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2973         u32 mask = 0;
2974
2975 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2976 do {\
2977         if (table[attr_num]) {\
2978                 cfg->param = nla_fn(table[attr_num]); \
2979                 mask |= (1 << (attr_num - 1)); \
2980         } \
2981 } while (0);\
2982
2983
2984         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
2985                 return -EINVAL;
2986         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2987                              info->attrs[NL80211_ATTR_MESH_CONFIG],
2988                              nl80211_meshconf_params_policy))
2989                 return -EINVAL;
2990
2991         /* This makes sure that there aren't more than 32 mesh config
2992          * parameters (otherwise our bitfield scheme would not work.) */
2993         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2994
2995         /* Fill in the params struct */
2996         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2997                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2998         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2999                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3000         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3001                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3002         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3003                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3004         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3005                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3006         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3007                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3008         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3009                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3010         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3011                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3012         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3013                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3014                         nla_get_u8);
3015         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3016                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3017         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3018                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3019                         nla_get_u16);
3020         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3021                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3022                         nla_get_u32);
3023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3024                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3025                         nla_get_u16);
3026         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3027                         dot11MeshHWMPnetDiameterTraversalTime,
3028                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3029                         nla_get_u16);
3030         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3031                         dot11MeshHWMPRootMode, mask,
3032                         NL80211_MESHCONF_HWMP_ROOTMODE,
3033                         nla_get_u8);
3034         if (mask_out)
3035                 *mask_out = mask;
3036
3037         return 0;
3038
3039 #undef FILL_IN_MESH_PARAM_IF_SET
3040 }
3041
3042 static int nl80211_parse_mesh_setup(struct genl_info *info,
3043                                      struct mesh_setup *setup)
3044 {
3045         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3046
3047         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3048                 return -EINVAL;
3049         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3050                              info->attrs[NL80211_ATTR_MESH_SETUP],
3051                              nl80211_mesh_setup_params_policy))
3052                 return -EINVAL;
3053
3054         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3055                 setup->path_sel_proto =
3056                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3057                  IEEE80211_PATH_PROTOCOL_VENDOR :
3058                  IEEE80211_PATH_PROTOCOL_HWMP;
3059
3060         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3061                 setup->path_metric =
3062                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3063                  IEEE80211_PATH_METRIC_VENDOR :
3064                  IEEE80211_PATH_METRIC_AIRTIME;
3065
3066
3067         if (tb[NL80211_MESH_SETUP_IE]) {
3068                 struct nlattr *ieattr =
3069                         tb[NL80211_MESH_SETUP_IE];
3070                 if (!is_valid_ie_attr(ieattr))
3071                         return -EINVAL;
3072                 setup->ie = nla_data(ieattr);
3073                 setup->ie_len = nla_len(ieattr);
3074         }
3075         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3076         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3077
3078         return 0;
3079 }
3080
3081 static int nl80211_update_mesh_config(struct sk_buff *skb,
3082                                       struct genl_info *info)
3083 {
3084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3085         struct net_device *dev = info->user_ptr[1];
3086         struct wireless_dev *wdev = dev->ieee80211_ptr;
3087         struct mesh_config cfg;
3088         u32 mask;
3089         int err;
3090
3091         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3092                 return -EOPNOTSUPP;
3093
3094         if (!rdev->ops->update_mesh_config)
3095                 return -EOPNOTSUPP;
3096
3097         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3098         if (err)
3099                 return err;
3100
3101         wdev_lock(wdev);
3102         if (!wdev->mesh_id_len)
3103                 err = -ENOLINK;
3104
3105         if (!err)
3106                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3107                                                     mask, &cfg);
3108
3109         wdev_unlock(wdev);
3110
3111         return err;
3112 }
3113
3114 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3115 {
3116         struct sk_buff *msg;
3117         void *hdr = NULL;
3118         struct nlattr *nl_reg_rules;
3119         unsigned int i;
3120         int err = -EINVAL;
3121
3122         mutex_lock(&cfg80211_mutex);
3123
3124         if (!cfg80211_regdomain)
3125                 goto out;
3126
3127         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3128         if (!msg) {
3129                 err = -ENOBUFS;
3130                 goto out;
3131         }
3132
3133         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3134                              NL80211_CMD_GET_REG);
3135         if (!hdr)
3136                 goto put_failure;
3137
3138         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3139                 cfg80211_regdomain->alpha2);
3140
3141         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3142         if (!nl_reg_rules)
3143                 goto nla_put_failure;
3144
3145         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3146                 struct nlattr *nl_reg_rule;
3147                 const struct ieee80211_reg_rule *reg_rule;
3148                 const struct ieee80211_freq_range *freq_range;
3149                 const struct ieee80211_power_rule *power_rule;
3150
3151                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3152                 freq_range = &reg_rule->freq_range;
3153                 power_rule = &reg_rule->power_rule;
3154
3155                 nl_reg_rule = nla_nest_start(msg, i);
3156                 if (!nl_reg_rule)
3157                         goto nla_put_failure;
3158
3159                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3160                         reg_rule->flags);
3161                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3162                         freq_range->start_freq_khz);
3163                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3164                         freq_range->end_freq_khz);
3165                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3166                         freq_range->max_bandwidth_khz);
3167                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3168                         power_rule->max_antenna_gain);
3169                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3170                         power_rule->max_eirp);
3171
3172                 nla_nest_end(msg, nl_reg_rule);
3173         }
3174
3175         nla_nest_end(msg, nl_reg_rules);
3176
3177         genlmsg_end(msg, hdr);
3178         err = genlmsg_reply(msg, info);
3179         goto out;
3180
3181 nla_put_failure:
3182         genlmsg_cancel(msg, hdr);
3183 put_failure:
3184         nlmsg_free(msg);
3185         err = -EMSGSIZE;
3186 out:
3187         mutex_unlock(&cfg80211_mutex);
3188         return err;
3189 }
3190
3191 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3192 {
3193         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3194         struct nlattr *nl_reg_rule;
3195         char *alpha2 = NULL;
3196         int rem_reg_rules = 0, r = 0;
3197         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3198         struct ieee80211_regdomain *rd = NULL;
3199
3200         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3201                 return -EINVAL;
3202
3203         if (!info->attrs[NL80211_ATTR_REG_RULES])
3204                 return -EINVAL;
3205
3206         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3207
3208         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3209                         rem_reg_rules) {
3210                 num_rules++;
3211                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3212                         return -EINVAL;
3213         }
3214
3215         mutex_lock(&cfg80211_mutex);
3216
3217         if (!reg_is_valid_request(alpha2)) {
3218                 r = -EINVAL;
3219                 goto bad_reg;
3220         }
3221
3222         size_of_regd = sizeof(struct ieee80211_regdomain) +
3223                 (num_rules * sizeof(struct ieee80211_reg_rule));
3224
3225         rd = kzalloc(size_of_regd, GFP_KERNEL);
3226         if (!rd) {
3227                 r = -ENOMEM;
3228                 goto bad_reg;
3229         }
3230
3231         rd->n_reg_rules = num_rules;
3232         rd->alpha2[0] = alpha2[0];
3233         rd->alpha2[1] = alpha2[1];
3234
3235         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3236                         rem_reg_rules) {
3237                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3238                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3239                         reg_rule_policy);
3240                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3241                 if (r)
3242                         goto bad_reg;
3243
3244                 rule_idx++;
3245
3246                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3247                         r = -EINVAL;
3248                         goto bad_reg;
3249                 }
3250         }
3251
3252         BUG_ON(rule_idx != num_rules);
3253
3254         r = set_regdom(rd);
3255
3256         mutex_unlock(&cfg80211_mutex);
3257
3258         return r;
3259
3260  bad_reg:
3261         mutex_unlock(&cfg80211_mutex);
3262         kfree(rd);
3263         return r;
3264 }
3265
3266 static int validate_scan_freqs(struct nlattr *freqs)
3267 {
3268         struct nlattr *attr1, *attr2;
3269         int n_channels = 0, tmp1, tmp2;
3270
3271         nla_for_each_nested(attr1, freqs, tmp1) {
3272                 n_channels++;
3273                 /*
3274                  * Some hardware has a limited channel list for
3275                  * scanning, and it is pretty much nonsensical
3276                  * to scan for a channel twice, so disallow that
3277                  * and don't require drivers to check that the
3278                  * channel list they get isn't longer than what
3279                  * they can scan, as long as they can scan all
3280                  * the channels they registered at once.
3281                  */
3282                 nla_for_each_nested(attr2, freqs, tmp2)
3283                         if (attr1 != attr2 &&
3284                             nla_get_u32(attr1) == nla_get_u32(attr2))
3285                                 return 0;
3286         }
3287
3288         return n_channels;
3289 }
3290
3291 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3292 {
3293         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3294         struct net_device *dev = info->user_ptr[1];
3295         struct cfg80211_scan_request *request;
3296         struct nlattr *attr;
3297         struct wiphy *wiphy;
3298         int err, tmp, n_ssids = 0, n_channels, i;
3299         enum ieee80211_band band;
3300         size_t ie_len;
3301
3302         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3303                 return -EINVAL;
3304
3305         wiphy = &rdev->wiphy;
3306
3307         if (!rdev->ops->scan)
3308                 return -EOPNOTSUPP;
3309
3310         if (rdev->scan_req)
3311                 return -EBUSY;
3312
3313         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3314                 n_channels = validate_scan_freqs(
3315                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3316                 if (!n_channels)
3317                         return -EINVAL;
3318         } else {
3319                 n_channels = 0;
3320
3321                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3322                         if (wiphy->bands[band])
3323                                 n_channels += wiphy->bands[band]->n_channels;
3324         }
3325
3326         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3327                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3328                         n_ssids++;
3329
3330         if (n_ssids > wiphy->max_scan_ssids)
3331                 return -EINVAL;
3332
3333         if (info->attrs[NL80211_ATTR_IE])
3334                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3335         else
3336                 ie_len = 0;
3337
3338         if (ie_len > wiphy->max_scan_ie_len)
3339                 return -EINVAL;
3340
3341         request = kzalloc(sizeof(*request)
3342                         + sizeof(*request->ssids) * n_ssids
3343                         + sizeof(*request->channels) * n_channels
3344                         + ie_len, GFP_KERNEL);
3345         if (!request)
3346                 return -ENOMEM;
3347
3348         if (n_ssids)
3349                 request->ssids = (void *)&request->channels[n_channels];
3350         request->n_ssids = n_ssids;
3351         if (ie_len) {
3352                 if (request->ssids)
3353                         request->ie = (void *)(request->ssids + n_ssids);
3354                 else
3355                         request->ie = (void *)(request->channels + n_channels);
3356         }
3357
3358         i = 0;
3359         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3360                 /* user specified, bail out if channel not found */
3361                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3362                         struct ieee80211_channel *chan;
3363
3364                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3365
3366                         if (!chan) {
3367                                 err = -EINVAL;
3368                                 goto out_free;
3369                         }
3370
3371                         /* ignore disabled channels */
3372                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3373                                 continue;
3374
3375                         request->channels[i] = chan;
3376                         i++;
3377                 }
3378         } else {
3379                 /* all channels */
3380                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3381                         int j;
3382                         if (!wiphy->bands[band])
3383                                 continue;
3384                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3385                                 struct ieee80211_channel *chan;
3386
3387                                 chan = &wiphy->bands[band]->channels[j];
3388
3389                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3390                                         continue;
3391
3392                                 request->channels[i] = chan;
3393                                 i++;
3394                         }
3395                 }
3396         }
3397
3398         if (!i) {
3399                 err = -EINVAL;
3400                 goto out_free;
3401         }
3402
3403         request->n_channels = i;
3404
3405         i = 0;
3406         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3407                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3408                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3409                                 err = -EINVAL;
3410                                 goto out_free;
3411                         }
3412                         request->ssids[i].ssid_len = nla_len(attr);
3413                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3414                         i++;
3415                 }
3416         }
3417
3418         if (info->attrs[NL80211_ATTR_IE]) {
3419                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3420                 memcpy((void *)request->ie,
3421                        nla_data(info->attrs[NL80211_ATTR_IE]),
3422                        request->ie_len);
3423         }
3424
3425         request->dev = dev;
3426         request->wiphy = &rdev->wiphy;
3427
3428         rdev->scan_req = request;
3429         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3430
3431         if (!err) {
3432                 nl80211_send_scan_start(rdev, dev);
3433                 dev_hold(dev);
3434         } else {
3435  out_free:
3436                 rdev->scan_req = NULL;
3437                 kfree(request);
3438         }
3439
3440         return err;
3441 }
3442
3443 static int nl80211_start_sched_scan(struct sk_buff *skb,
3444                                     struct genl_info *info)
3445 {
3446         struct cfg80211_sched_scan_request *request;
3447         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3448         struct net_device *dev = info->user_ptr[1];
3449         struct nlattr *attr;
3450         struct wiphy *wiphy;
3451         int err, tmp, n_ssids = 0, n_channels, i;
3452         u32 interval;
3453         enum ieee80211_band band;
3454         size_t ie_len;
3455
3456         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3457             !rdev->ops->sched_scan_start)
3458                 return -EOPNOTSUPP;
3459
3460         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3461                 return -EINVAL;
3462
3463         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3464                 return -EINVAL;
3465
3466         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3467         if (interval == 0)
3468                 return -EINVAL;
3469
3470         wiphy = &rdev->wiphy;
3471
3472         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3473                 n_channels = validate_scan_freqs(
3474                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3475                 if (!n_channels)
3476                         return -EINVAL;
3477         } else {
3478                 n_channels = 0;
3479
3480                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3481                         if (wiphy->bands[band])
3482                                 n_channels += wiphy->bands[band]->n_channels;
3483         }
3484
3485         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3486                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3487                                     tmp)
3488                         n_ssids++;
3489
3490         if (n_ssids > wiphy->max_scan_ssids)
3491                 return -EINVAL;
3492
3493         if (info->attrs[NL80211_ATTR_IE])
3494                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3495         else
3496                 ie_len = 0;
3497
3498         if (ie_len > wiphy->max_scan_ie_len)
3499                 return -EINVAL;
3500
3501         mutex_lock(&rdev->sched_scan_mtx);
3502
3503         if (rdev->sched_scan_req) {
3504                 err = -EINPROGRESS;
3505                 goto out;
3506         }
3507
3508         request = kzalloc(sizeof(*request)
3509                         + sizeof(*request->ssids) * n_ssids
3510                         + sizeof(*request->channels) * n_channels
3511                         + ie_len, GFP_KERNEL);
3512         if (!request) {
3513                 err = -ENOMEM;
3514                 goto out;
3515         }
3516
3517         if (n_ssids)
3518                 request->ssids = (void *)&request->channels[n_channels];
3519         request->n_ssids = n_ssids;
3520         if (ie_len) {
3521                 if (request->ssids)
3522                         request->ie = (void *)(request->ssids + n_ssids);
3523                 else
3524                         request->ie = (void *)(request->channels + n_channels);
3525         }
3526
3527         i = 0;
3528         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3529                 /* user specified, bail out if channel not found */
3530                 nla_for_each_nested(attr,
3531                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3532                                     tmp) {
3533                         struct ieee80211_channel *chan;
3534
3535                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3536
3537                         if (!chan) {
3538                                 err = -EINVAL;
3539                                 goto out_free;
3540                         }
3541
3542                         /* ignore disabled channels */
3543                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3544                                 continue;
3545
3546                         request->channels[i] = chan;
3547                         i++;
3548                 }
3549         } else {
3550                 /* all channels */
3551                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3552                         int j;
3553                         if (!wiphy->bands[band])
3554                                 continue;
3555                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3556                                 struct ieee80211_channel *chan;
3557
3558                                 chan = &wiphy->bands[band]->channels[j];
3559
3560                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3561                                         continue;
3562
3563                                 request->channels[i] = chan;
3564                                 i++;
3565                         }
3566                 }
3567         }
3568
3569         if (!i) {
3570                 err = -EINVAL;
3571                 goto out_free;
3572         }
3573
3574         request->n_channels = i;
3575
3576         i = 0;
3577         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3578                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3579                                     tmp) {
3580                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3581                                 err = -EINVAL;
3582                                 goto out_free;
3583                         }
3584                         request->ssids[i].ssid_len = nla_len(attr);
3585                         memcpy(request->ssids[i].ssid, nla_data(attr),
3586                                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         mutex_unlock(&rdev->sched_scan_mtx);
3614         return err;
3615 }
3616
3617 static int nl80211_stop_sched_scan(struct sk_buff *skb,
3618                                    struct genl_info *info)
3619 {
3620         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3621         int err;
3622
3623         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3624             !rdev->ops->sched_scan_stop)
3625                 return -EOPNOTSUPP;
3626
3627         mutex_lock(&rdev->sched_scan_mtx);
3628         err = __cfg80211_stop_sched_scan(rdev, false);
3629         mutex_unlock(&rdev->sched_scan_mtx);
3630
3631         return err;
3632 }
3633
3634 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3635                             struct cfg80211_registered_device *rdev,
3636                             struct wireless_dev *wdev,
3637                             struct cfg80211_internal_bss *intbss)
3638 {
3639         struct cfg80211_bss *res = &intbss->pub;
3640         void *hdr;
3641         struct nlattr *bss;
3642         int i;
3643
3644         ASSERT_WDEV_LOCK(wdev);
3645
3646         hdr = nl80211hdr_put(msg, pid, seq, flags,
3647                              NL80211_CMD_NEW_SCAN_RESULTS);
3648         if (!hdr)
3649                 return -1;
3650
3651         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3652         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3653
3654         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3655         if (!bss)
3656                 goto nla_put_failure;
3657         if (!is_zero_ether_addr(res->bssid))
3658                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3659         if (res->information_elements && res->len_information_elements)
3660                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3661                         res->len_information_elements,
3662                         res->information_elements);
3663         if (res->beacon_ies && res->len_beacon_ies &&
3664             res->beacon_ies != res->information_elements)
3665                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3666                         res->len_beacon_ies, res->beacon_ies);
3667         if (res->tsf)
3668                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3669         if (res->beacon_interval)
3670                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3671         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3672         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3673         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3674                 jiffies_to_msecs(jiffies - intbss->ts));
3675
3676         switch (rdev->wiphy.signal_type) {
3677         case CFG80211_SIGNAL_TYPE_MBM:
3678                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3679                 break;
3680         case CFG80211_SIGNAL_TYPE_UNSPEC:
3681                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3682                 break;
3683         default:
3684                 break;
3685         }
3686
3687         switch (wdev->iftype) {
3688         case NL80211_IFTYPE_P2P_CLIENT:
3689         case NL80211_IFTYPE_STATION:
3690                 if (intbss == wdev->current_bss)
3691                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3692                                     NL80211_BSS_STATUS_ASSOCIATED);
3693                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3694                         if (intbss != wdev->auth_bsses[i])
3695                                 continue;
3696                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3697                                     NL80211_BSS_STATUS_AUTHENTICATED);
3698                         break;
3699                 }
3700                 break;
3701         case NL80211_IFTYPE_ADHOC:
3702                 if (intbss == wdev->current_bss)
3703                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3704                                     NL80211_BSS_STATUS_IBSS_JOINED);
3705                 break;
3706         default:
3707                 break;
3708         }
3709
3710         nla_nest_end(msg, bss);
3711
3712         return genlmsg_end(msg, hdr);
3713
3714  nla_put_failure:
3715         genlmsg_cancel(msg, hdr);
3716         return -EMSGSIZE;
3717 }
3718
3719 static int nl80211_dump_scan(struct sk_buff *skb,
3720                              struct netlink_callback *cb)
3721 {
3722         struct cfg80211_registered_device *rdev;
3723         struct net_device *dev;
3724         struct cfg80211_internal_bss *scan;
3725         struct wireless_dev *wdev;
3726         int start = cb->args[1], idx = 0;
3727         int err;
3728
3729         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3730         if (err)
3731                 return err;
3732
3733         wdev = dev->ieee80211_ptr;
3734
3735         wdev_lock(wdev);
3736         spin_lock_bh(&rdev->bss_lock);
3737         cfg80211_bss_expire(rdev);
3738
3739         list_for_each_entry(scan, &rdev->bss_list, list) {
3740                 if (++idx <= start)
3741                         continue;
3742                 if (nl80211_send_bss(skb,
3743                                 NETLINK_CB(cb->skb).pid,
3744                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3745                                 rdev, wdev, scan) < 0) {
3746                         idx--;
3747                         break;
3748                 }
3749         }
3750
3751         spin_unlock_bh(&rdev->bss_lock);
3752         wdev_unlock(wdev);
3753
3754         cb->args[1] = idx;
3755         nl80211_finish_netdev_dump(rdev);
3756
3757         return skb->len;
3758 }
3759
3760 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3761                                 int flags, struct net_device *dev,
3762                                 struct survey_info *survey)
3763 {
3764         void *hdr;
3765         struct nlattr *infoattr;
3766
3767         /* Survey without a channel doesn't make sense */
3768         if (!survey->channel)
3769                 return -EINVAL;
3770
3771         hdr = nl80211hdr_put(msg, pid, seq, flags,
3772                              NL80211_CMD_NEW_SURVEY_RESULTS);
3773         if (!hdr)
3774                 return -ENOMEM;
3775
3776         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3777
3778         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3779         if (!infoattr)
3780                 goto nla_put_failure;
3781
3782         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3783                     survey->channel->center_freq);
3784         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3785                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3786                             survey->noise);
3787         if (survey->filled & SURVEY_INFO_IN_USE)
3788                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3789         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3790                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3791                             survey->channel_time);
3792         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3793                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3794                             survey->channel_time_busy);
3795         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3796                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3797                             survey->channel_time_ext_busy);
3798         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3799                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3800                             survey->channel_time_rx);
3801         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3802                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3803                             survey->channel_time_tx);
3804
3805         nla_nest_end(msg, infoattr);
3806
3807         return genlmsg_end(msg, hdr);
3808
3809  nla_put_failure:
3810         genlmsg_cancel(msg, hdr);
3811         return -EMSGSIZE;
3812 }
3813
3814 static int nl80211_dump_survey(struct sk_buff *skb,
3815                         struct netlink_callback *cb)
3816 {
3817         struct survey_info survey;
3818         struct cfg80211_registered_device *dev;
3819         struct net_device *netdev;
3820         int survey_idx = cb->args[1];
3821         int res;
3822
3823         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3824         if (res)
3825                 return res;
3826
3827         if (!dev->ops->dump_survey) {
3828                 res = -EOPNOTSUPP;
3829                 goto out_err;
3830         }
3831
3832         while (1) {
3833                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3834                                             &survey);
3835                 if (res == -ENOENT)
3836                         break;
3837                 if (res)
3838                         goto out_err;
3839
3840                 if (nl80211_send_survey(skb,
3841                                 NETLINK_CB(cb->skb).pid,
3842                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3843                                 netdev,
3844                                 &survey) < 0)
3845                         goto out;
3846                 survey_idx++;
3847         }
3848
3849  out:
3850         cb->args[1] = survey_idx;
3851         res = skb->len;
3852  out_err:
3853         nl80211_finish_netdev_dump(dev);
3854         return res;
3855 }
3856
3857 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3858 {
3859         return auth_type <= NL80211_AUTHTYPE_MAX;
3860 }
3861
3862 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3863 {
3864         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3865                                   NL80211_WPA_VERSION_2));
3866 }
3867
3868 static bool nl80211_valid_akm_suite(u32 akm)
3869 {
3870         return akm == WLAN_AKM_SUITE_8021X ||
3871                 akm == WLAN_AKM_SUITE_PSK;
3872 }
3873
3874 static bool nl80211_valid_cipher_suite(u32 cipher)
3875 {
3876         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3877                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3878                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3879                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3880                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3881 }
3882
3883
3884 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3885 {
3886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3887         struct net_device *dev = info->user_ptr[1];
3888         struct ieee80211_channel *chan;
3889         const u8 *bssid, *ssid, *ie = NULL;
3890         int err, ssid_len, ie_len = 0;
3891         enum nl80211_auth_type auth_type;
3892         struct key_parse key;
3893         bool local_state_change;
3894
3895         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3896                 return -EINVAL;
3897
3898         if (!info->attrs[NL80211_ATTR_MAC])
3899                 return -EINVAL;
3900
3901         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3902                 return -EINVAL;
3903
3904         if (!info->attrs[NL80211_ATTR_SSID])
3905                 return -EINVAL;
3906
3907         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3908                 return -EINVAL;
3909
3910         err = nl80211_parse_key(info, &key);
3911         if (err)
3912                 return err;
3913
3914         if (key.idx >= 0) {
3915                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3916                         return -EINVAL;
3917                 if (!key.p.key || !key.p.key_len)
3918                         return -EINVAL;
3919                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3920                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3921                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3922                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3923                         return -EINVAL;
3924                 if (key.idx > 4)
3925                         return -EINVAL;
3926         } else {
3927                 key.p.key_len = 0;
3928                 key.p.key = NULL;
3929         }
3930
3931         if (key.idx >= 0) {
3932                 int i;
3933                 bool ok = false;
3934                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3935                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3936                                 ok = true;
3937                                 break;
3938                         }
3939                 }
3940                 if (!ok)
3941                         return -EINVAL;
3942         }
3943
3944         if (!rdev->ops->auth)
3945                 return -EOPNOTSUPP;
3946
3947         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3948             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3949                 return -EOPNOTSUPP;
3950
3951         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3952         chan = ieee80211_get_channel(&rdev->wiphy,
3953                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3954         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3955                 return -EINVAL;
3956
3957         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3958         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3959
3960         if (info->attrs[NL80211_ATTR_IE]) {
3961                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3962                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3963         }
3964
3965         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3966         if (!nl80211_valid_auth_type(auth_type))
3967                 return -EINVAL;
3968
3969         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3970
3971         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3972                                   ssid, ssid_len, ie, ie_len,
3973                                   key.p.key, key.p.key_len, key.idx,
3974                                   local_state_change);
3975 }
3976
3977 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3978                                    struct genl_info *info,
3979                                    struct cfg80211_crypto_settings *settings,
3980                                    int cipher_limit)
3981 {
3982         memset(settings, 0, sizeof(*settings));
3983
3984         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3985
3986         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3987                 u16 proto;
3988                 proto = nla_get_u16(
3989                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3990                 settings->control_port_ethertype = cpu_to_be16(proto);
3991                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3992                     proto != ETH_P_PAE)
3993                         return -EINVAL;
3994                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3995                         settings->control_port_no_encrypt = true;
3996         } else
3997                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3998
3999         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4000                 void *data;
4001                 int len, i;
4002
4003                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4004                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4005                 settings->n_ciphers_pairwise = len / sizeof(u32);
4006
4007                 if (len % sizeof(u32))
4008                         return -EINVAL;
4009
4010                 if (settings->n_ciphers_pairwise > cipher_limit)
4011                         return -EINVAL;
4012
4013                 memcpy(settings->ciphers_pairwise, data, len);
4014
4015                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4016                         if (!nl80211_valid_cipher_suite(
4017                                         settings->ciphers_pairwise[i]))
4018                                 return -EINVAL;
4019         }
4020
4021         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4022                 settings->cipher_group =
4023                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4024                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
4025                         return -EINVAL;
4026         }
4027
4028         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4029                 settings->wpa_versions =
4030                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4031                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4032                         return -EINVAL;
4033         }
4034
4035         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4036                 void *data;
4037                 int len, i;
4038
4039                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4040                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4041                 settings->n_akm_suites = len / sizeof(u32);
4042
4043                 if (len % sizeof(u32))
4044                         return -EINVAL;
4045
4046                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4047                         return -EINVAL;
4048
4049                 memcpy(settings->akm_suites, data, len);
4050
4051                 for (i = 0; i < settings->n_akm_suites; i++)
4052                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
4053                                 return -EINVAL;
4054         }
4055
4056         return 0;
4057 }
4058
4059 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4060 {
4061         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4062         struct net_device *dev = info->user_ptr[1];
4063         struct cfg80211_crypto_settings crypto;
4064         struct ieee80211_channel *chan;
4065         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4066         int err, ssid_len, ie_len = 0;
4067         bool use_mfp = false;
4068
4069         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4070                 return -EINVAL;
4071
4072         if (!info->attrs[NL80211_ATTR_MAC] ||
4073             !info->attrs[NL80211_ATTR_SSID] ||
4074             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4075                 return -EINVAL;
4076
4077         if (!rdev->ops->assoc)
4078                 return -EOPNOTSUPP;
4079
4080         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4081             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4082                 return -EOPNOTSUPP;
4083
4084         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4085
4086         chan = ieee80211_get_channel(&rdev->wiphy,
4087                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4088         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4089                 return -EINVAL;
4090
4091         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4092         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4093
4094         if (info->attrs[NL80211_ATTR_IE]) {
4095                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4096                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4097         }
4098
4099         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4100                 enum nl80211_mfp mfp =
4101                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4102                 if (mfp == NL80211_MFP_REQUIRED)
4103                         use_mfp = true;
4104                 else if (mfp != NL80211_MFP_NO)
4105                         return -EINVAL;
4106         }
4107
4108         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4109                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4110
4111         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4112         if (!err)
4113                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4114                                           ssid, ssid_len, ie, ie_len, use_mfp,
4115                                           &crypto);
4116
4117         return err;
4118 }
4119
4120 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4121 {
4122         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4123         struct net_device *dev = info->user_ptr[1];
4124         const u8 *ie = NULL, *bssid;
4125         int ie_len = 0;
4126         u16 reason_code;
4127         bool local_state_change;
4128
4129         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4130                 return -EINVAL;
4131
4132         if (!info->attrs[NL80211_ATTR_MAC])
4133                 return -EINVAL;
4134
4135         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4136                 return -EINVAL;
4137
4138         if (!rdev->ops->deauth)
4139                 return -EOPNOTSUPP;
4140
4141         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4142             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4143                 return -EOPNOTSUPP;
4144
4145         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4146
4147         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4148         if (reason_code == 0) {
4149                 /* Reason Code 0 is reserved */
4150                 return -EINVAL;
4151         }
4152
4153         if (info->attrs[NL80211_ATTR_IE]) {
4154                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4155                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4156         }
4157
4158         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4159
4160         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4161                                     local_state_change);
4162 }
4163
4164 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4165 {
4166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4167         struct net_device *dev = info->user_ptr[1];
4168         const u8 *ie = NULL, *bssid;
4169         int ie_len = 0;
4170         u16 reason_code;
4171         bool local_state_change;
4172
4173         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4174                 return -EINVAL;
4175
4176         if (!info->attrs[NL80211_ATTR_MAC])
4177                 return -EINVAL;
4178
4179         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4180                 return -EINVAL;
4181
4182         if (!rdev->ops->disassoc)
4183                 return -EOPNOTSUPP;
4184
4185         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4186             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4187                 return -EOPNOTSUPP;
4188
4189         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4190
4191         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4192         if (reason_code == 0) {
4193                 /* Reason Code 0 is reserved */
4194                 return -EINVAL;
4195         }
4196
4197         if (info->attrs[NL80211_ATTR_IE]) {
4198                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4199                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4200         }
4201
4202         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4203
4204         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4205                                       local_state_change);
4206 }
4207
4208 static bool
4209 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4210                          int mcast_rate[IEEE80211_NUM_BANDS],
4211                          int rateval)
4212 {
4213         struct wiphy *wiphy = &rdev->wiphy;
4214         bool found = false;
4215         int band, i;
4216
4217         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4218                 struct ieee80211_supported_band *sband;
4219
4220                 sband = wiphy->bands[band];
4221                 if (!sband)
4222                         continue;
4223
4224                 for (i = 0; i < sband->n_bitrates; i++) {
4225                         if (sband->bitrates[i].bitrate == rateval) {
4226                                 mcast_rate[band] = i + 1;
4227                                 found = true;
4228                                 break;
4229                         }
4230                 }
4231         }
4232
4233         return found;
4234 }
4235
4236 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4237 {
4238         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4239         struct net_device *dev = info->user_ptr[1];
4240         struct cfg80211_ibss_params ibss;
4241         struct wiphy *wiphy;
4242         struct cfg80211_cached_keys *connkeys = NULL;
4243         int err;
4244
4245         memset(&ibss, 0, sizeof(ibss));
4246
4247         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4248                 return -EINVAL;
4249
4250         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4251             !info->attrs[NL80211_ATTR_SSID] ||
4252             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4253                 return -EINVAL;
4254
4255         ibss.beacon_interval = 100;
4256
4257         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4258                 ibss.beacon_interval =
4259                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4260                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4261                         return -EINVAL;
4262         }
4263
4264         if (!rdev->ops->join_ibss)
4265                 return -EOPNOTSUPP;
4266
4267         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4268                 return -EOPNOTSUPP;
4269
4270         wiphy = &rdev->wiphy;
4271
4272         if (info->attrs[NL80211_ATTR_MAC])
4273                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4274         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4275         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4276
4277         if (info->attrs[NL80211_ATTR_IE]) {
4278                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4279                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4280         }
4281
4282         ibss.channel = ieee80211_get_channel(wiphy,
4283                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4284         if (!ibss.channel ||
4285             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4286             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4287                 return -EINVAL;
4288
4289         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4290         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4291
4292         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4293                 u8 *rates =
4294                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4295                 int n_rates =
4296                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4297                 struct ieee80211_supported_band *sband =
4298                         wiphy->bands[ibss.channel->band];
4299                 int i, j;
4300
4301                 if (n_rates == 0)
4302                         return -EINVAL;
4303
4304                 for (i = 0; i < n_rates; i++) {
4305                         int rate = (rates[i] & 0x7f) * 5;
4306                         bool found = false;
4307
4308                         for (j = 0; j < sband->n_bitrates; j++) {
4309                                 if (sband->bitrates[j].bitrate == rate) {
4310                                         found = true;
4311                                         ibss.basic_rates |= BIT(j);
4312                                         break;
4313                                 }
4314                         }
4315                         if (!found)
4316                                 return -EINVAL;
4317                 }
4318         }
4319
4320         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4321             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4322                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4323                 return -EINVAL;
4324
4325         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4326                 connkeys = nl80211_parse_connkeys(rdev,
4327                                         info->attrs[NL80211_ATTR_KEYS]);
4328                 if (IS_ERR(connkeys))
4329                         return PTR_ERR(connkeys);
4330         }
4331
4332         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4333         if (err)
4334                 kfree(connkeys);
4335         return err;
4336 }
4337
4338 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4339 {
4340         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4341         struct net_device *dev = info->user_ptr[1];
4342
4343         if (!rdev->ops->leave_ibss)
4344                 return -EOPNOTSUPP;
4345
4346         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4347                 return -EOPNOTSUPP;
4348
4349         return cfg80211_leave_ibss(rdev, dev, false);
4350 }
4351
4352 #ifdef CONFIG_NL80211_TESTMODE
4353 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4354         .name = "testmode",
4355 };
4356
4357 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4358 {
4359         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4360         int err;
4361
4362         if (!info->attrs[NL80211_ATTR_TESTDATA])
4363                 return -EINVAL;
4364
4365         err = -EOPNOTSUPP;
4366         if (rdev->ops->testmode_cmd) {
4367                 rdev->testmode_info = info;
4368                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4369                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4370                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4371                 rdev->testmode_info = NULL;
4372         }
4373
4374         return err;
4375 }
4376
4377 static struct sk_buff *
4378 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4379                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4380 {
4381         struct sk_buff *skb;
4382         void *hdr;
4383         struct nlattr *data;
4384
4385         skb = nlmsg_new(approxlen + 100, gfp);
4386         if (!skb)
4387                 return NULL;
4388
4389         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4390         if (!hdr) {
4391                 kfree_skb(skb);
4392                 return NULL;
4393         }
4394
4395         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4396         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4397
4398         ((void **)skb->cb)[0] = rdev;
4399         ((void **)skb->cb)[1] = hdr;
4400         ((void **)skb->cb)[2] = data;
4401
4402         return skb;
4403
4404  nla_put_failure:
4405         kfree_skb(skb);
4406         return NULL;
4407 }
4408
4409 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4410                                                   int approxlen)
4411 {
4412         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4413
4414         if (WARN_ON(!rdev->testmode_info))
4415                 return NULL;
4416
4417         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4418                                 rdev->testmode_info->snd_pid,
4419                                 rdev->testmode_info->snd_seq,
4420                                 GFP_KERNEL);
4421 }
4422 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4423
4424 int cfg80211_testmode_reply(struct sk_buff *skb)
4425 {
4426         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4427         void *hdr = ((void **)skb->cb)[1];
4428         struct nlattr *data = ((void **)skb->cb)[2];
4429
4430         if (WARN_ON(!rdev->testmode_info)) {
4431                 kfree_skb(skb);
4432                 return -EINVAL;
4433         }
4434
4435         nla_nest_end(skb, data);
4436         genlmsg_end(skb, hdr);
4437         return genlmsg_reply(skb, rdev->testmode_info);
4438 }
4439 EXPORT_SYMBOL(cfg80211_testmode_reply);
4440
4441 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4442                                                   int approxlen, gfp_t gfp)
4443 {
4444         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4445
4446         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4447 }
4448 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4449
4450 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4451 {
4452         void *hdr = ((void **)skb->cb)[1];
4453         struct nlattr *data = ((void **)skb->cb)[2];
4454
4455         nla_nest_end(skb, data);
4456         genlmsg_end(skb, hdr);
4457         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4458 }
4459 EXPORT_SYMBOL(cfg80211_testmode_event);
4460 #endif
4461
4462 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4463 {
4464         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4465         struct net_device *dev = info->user_ptr[1];
4466         struct cfg80211_connect_params connect;
4467         struct wiphy *wiphy;
4468         struct cfg80211_cached_keys *connkeys = NULL;
4469         int err;
4470
4471         memset(&connect, 0, sizeof(connect));
4472
4473         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4474                 return -EINVAL;
4475
4476         if (!info->attrs[NL80211_ATTR_SSID] ||
4477             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4478                 return -EINVAL;
4479
4480         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4481                 connect.auth_type =
4482                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4483                 if (!nl80211_valid_auth_type(connect.auth_type))
4484                         return -EINVAL;
4485         } else
4486                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4487
4488         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4489
4490         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4491                                       NL80211_MAX_NR_CIPHER_SUITES);
4492         if (err)
4493                 return err;
4494
4495         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4496             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4497                 return -EOPNOTSUPP;
4498
4499         wiphy = &rdev->wiphy;
4500
4501         if (info->attrs[NL80211_ATTR_MAC])
4502                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4503         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4504         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4505
4506         if (info->attrs[NL80211_ATTR_IE]) {
4507                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4508                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4509         }
4510
4511         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4512                 connect.channel =
4513                         ieee80211_get_channel(wiphy,
4514                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4515                 if (!connect.channel ||
4516                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4517                         return -EINVAL;
4518         }
4519
4520         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4521                 connkeys = nl80211_parse_connkeys(rdev,
4522                                         info->attrs[NL80211_ATTR_KEYS]);
4523                 if (IS_ERR(connkeys))
4524                         return PTR_ERR(connkeys);
4525         }
4526
4527         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4528         if (err)
4529                 kfree(connkeys);
4530         return err;
4531 }
4532
4533 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4534 {
4535         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4536         struct net_device *dev = info->user_ptr[1];
4537         u16 reason;
4538
4539         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4540                 reason = WLAN_REASON_DEAUTH_LEAVING;
4541         else
4542                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4543
4544         if (reason == 0)
4545                 return -EINVAL;
4546
4547         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4548             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4549                 return -EOPNOTSUPP;
4550
4551         return cfg80211_disconnect(rdev, dev, reason, true);
4552 }
4553
4554 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4555 {
4556         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4557         struct net *net;
4558         int err;
4559         u32 pid;
4560
4561         if (!info->attrs[NL80211_ATTR_PID])
4562                 return -EINVAL;
4563
4564         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4565
4566         net = get_net_ns_by_pid(pid);
4567         if (IS_ERR(net))
4568                 return PTR_ERR(net);
4569
4570         err = 0;
4571
4572         /* check if anything to do */
4573         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4574                 err = cfg80211_switch_netns(rdev, net);
4575
4576         put_net(net);
4577         return err;
4578 }
4579
4580 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4581 {
4582         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4583         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4584                         struct cfg80211_pmksa *pmksa) = NULL;
4585         struct net_device *dev = info->user_ptr[1];
4586         struct cfg80211_pmksa pmksa;
4587
4588         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4589
4590         if (!info->attrs[NL80211_ATTR_MAC])
4591                 return -EINVAL;
4592
4593         if (!info->attrs[NL80211_ATTR_PMKID])
4594                 return -EINVAL;
4595
4596         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4597         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4598
4599         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4600             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4601                 return -EOPNOTSUPP;
4602
4603         switch (info->genlhdr->cmd) {
4604         case NL80211_CMD_SET_PMKSA:
4605                 rdev_ops = rdev->ops->set_pmksa;
4606                 break;
4607         case NL80211_CMD_DEL_PMKSA:
4608                 rdev_ops = rdev->ops->del_pmksa;
4609                 break;
4610         default:
4611                 WARN_ON(1);
4612                 break;
4613         }
4614
4615         if (!rdev_ops)
4616                 return -EOPNOTSUPP;
4617
4618         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4619 }
4620
4621 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4622 {
4623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4624         struct net_device *dev = info->user_ptr[1];
4625
4626         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4627             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4628                 return -EOPNOTSUPP;
4629
4630         if (!rdev->ops->flush_pmksa)
4631                 return -EOPNOTSUPP;
4632
4633         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4634 }
4635
4636 static int nl80211_remain_on_channel(struct sk_buff *skb,
4637                                      struct genl_info *info)
4638 {
4639         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4640         struct net_device *dev = info->user_ptr[1];
4641         struct ieee80211_channel *chan;
4642         struct sk_buff *msg;
4643         void *hdr;
4644         u64 cookie;
4645         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4646         u32 freq, duration;
4647         int err;
4648
4649         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4650             !info->attrs[NL80211_ATTR_DURATION])
4651                 return -EINVAL;
4652
4653         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4654
4655         /*
4656          * We should be on that channel for at least one jiffie,
4657          * and more than 5 seconds seems excessive.
4658          */
4659         if (!duration || !msecs_to_jiffies(duration) ||
4660             duration > rdev->wiphy.max_remain_on_channel_duration)
4661                 return -EINVAL;
4662
4663         if (!rdev->ops->remain_on_channel)
4664                 return -EOPNOTSUPP;
4665
4666         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4667                 channel_type = nla_get_u32(
4668                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4669                 if (channel_type != NL80211_CHAN_NO_HT &&
4670                     channel_type != NL80211_CHAN_HT20 &&
4671                     channel_type != NL80211_CHAN_HT40PLUS &&
4672                     channel_type != NL80211_CHAN_HT40MINUS)
4673                         return -EINVAL;
4674         }
4675
4676         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4677         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4678         if (chan == NULL)
4679                 return -EINVAL;
4680
4681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4682         if (!msg)
4683                 return -ENOMEM;
4684
4685         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4686                              NL80211_CMD_REMAIN_ON_CHANNEL);
4687
4688         if (IS_ERR(hdr)) {
4689                 err = PTR_ERR(hdr);
4690                 goto free_msg;
4691         }
4692
4693         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4694                                            channel_type, duration, &cookie);
4695
4696         if (err)
4697                 goto free_msg;
4698
4699         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4700
4701         genlmsg_end(msg, hdr);
4702
4703         return genlmsg_reply(msg, info);
4704
4705  nla_put_failure:
4706         err = -ENOBUFS;
4707  free_msg:
4708         nlmsg_free(msg);
4709         return err;
4710 }
4711
4712 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4713                                             struct genl_info *info)
4714 {
4715         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4716         struct net_device *dev = info->user_ptr[1];
4717         u64 cookie;
4718
4719         if (!info->attrs[NL80211_ATTR_COOKIE])
4720                 return -EINVAL;
4721
4722         if (!rdev->ops->cancel_remain_on_channel)
4723                 return -EOPNOTSUPP;
4724
4725         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4726
4727         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4728 }
4729
4730 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4731                            u8 *rates, u8 rates_len)
4732 {
4733         u8 i;
4734         u32 mask = 0;
4735
4736         for (i = 0; i < rates_len; i++) {
4737                 int rate = (rates[i] & 0x7f) * 5;
4738                 int ridx;
4739                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4740                         struct ieee80211_rate *srate =
4741                                 &sband->bitrates[ridx];
4742                         if (rate == srate->bitrate) {
4743                                 mask |= 1 << ridx;
4744                                 break;
4745                         }
4746                 }
4747                 if (ridx == sband->n_bitrates)
4748                         return 0; /* rate not found */
4749         }
4750
4751         return mask;
4752 }
4753
4754 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4755         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4756                                     .len = NL80211_MAX_SUPP_RATES },
4757 };
4758
4759 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4760                                        struct genl_info *info)
4761 {
4762         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4763         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4764         struct cfg80211_bitrate_mask mask;
4765         int rem, i;
4766         struct net_device *dev = info->user_ptr[1];
4767         struct nlattr *tx_rates;
4768         struct ieee80211_supported_band *sband;
4769
4770         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4771                 return -EINVAL;
4772
4773         if (!rdev->ops->set_bitrate_mask)
4774                 return -EOPNOTSUPP;
4775
4776         memset(&mask, 0, sizeof(mask));
4777         /* Default to all rates enabled */
4778         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4779                 sband = rdev->wiphy.bands[i];
4780                 mask.control[i].legacy =
4781                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4782         }
4783
4784         /*
4785          * The nested attribute uses enum nl80211_band as the index. This maps
4786          * directly to the enum ieee80211_band values used in cfg80211.
4787          */
4788         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4789         {
4790                 enum ieee80211_band band = nla_type(tx_rates);
4791                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4792                         return -EINVAL;
4793                 sband = rdev->wiphy.bands[band];
4794                 if (sband == NULL)
4795                         return -EINVAL;
4796                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4797                           nla_len(tx_rates), nl80211_txattr_policy);
4798                 if (tb[NL80211_TXRATE_LEGACY]) {
4799                         mask.control[band].legacy = rateset_to_mask(
4800                                 sband,
4801                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4802                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4803                         if (mask.control[band].legacy == 0)
4804                                 return -EINVAL;
4805                 }
4806         }
4807
4808         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4809 }
4810
4811 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4812 {
4813         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4814         struct net_device *dev = info->user_ptr[1];
4815         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4816
4817         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4818                 return -EINVAL;
4819
4820         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4821                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4822
4823         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4824             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4825             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4826             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4827             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4828             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4829             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4830                 return -EOPNOTSUPP;
4831
4832         /* not much point in registering if we can't reply */
4833         if (!rdev->ops->mgmt_tx)
4834                 return -EOPNOTSUPP;
4835
4836         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4837                         frame_type,
4838                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4839                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4840 }
4841
4842 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4843 {
4844         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4845         struct net_device *dev = info->user_ptr[1];
4846         struct ieee80211_channel *chan;
4847         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4848         bool channel_type_valid = false;
4849         u32 freq;
4850         int err;
4851         void *hdr;
4852         u64 cookie;
4853         struct sk_buff *msg;
4854         unsigned int wait = 0;
4855         bool offchan;
4856
4857         if (!info->attrs[NL80211_ATTR_FRAME] ||
4858             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4859                 return -EINVAL;
4860
4861         if (!rdev->ops->mgmt_tx)
4862                 return -EOPNOTSUPP;
4863
4864         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4865             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4866             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4867             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4868             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4869             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4870             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4871                 return -EOPNOTSUPP;
4872
4873         if (info->attrs[NL80211_ATTR_DURATION]) {
4874                 if (!rdev->ops->mgmt_tx_cancel_wait)
4875                         return -EINVAL;
4876                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4877         }
4878
4879         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4880                 channel_type = nla_get_u32(
4881                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4882                 if (channel_type != NL80211_CHAN_NO_HT &&
4883                     channel_type != NL80211_CHAN_HT20 &&
4884                     channel_type != NL80211_CHAN_HT40PLUS &&
4885                     channel_type != NL80211_CHAN_HT40MINUS)
4886                         return -EINVAL;
4887                 channel_type_valid = true;
4888         }
4889
4890         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4891
4892         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4893         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4894         if (chan == NULL)
4895                 return -EINVAL;
4896
4897         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4898         if (!msg)
4899                 return -ENOMEM;
4900
4901         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4902                              NL80211_CMD_FRAME);
4903
4904         if (IS_ERR(hdr)) {
4905                 err = PTR_ERR(hdr);
4906                 goto free_msg;
4907         }
4908         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4909                                     channel_type_valid, wait,
4910                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4911                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4912                                     &cookie);
4913         if (err)
4914                 goto free_msg;
4915
4916         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4917
4918         genlmsg_end(msg, hdr);
4919         return genlmsg_reply(msg, info);
4920
4921  nla_put_failure:
4922         err = -ENOBUFS;
4923  free_msg:
4924         nlmsg_free(msg);
4925         return err;
4926 }
4927
4928 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
4929 {
4930         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4931         struct net_device *dev = info->user_ptr[1];
4932         u64 cookie;
4933
4934         if (!info->attrs[NL80211_ATTR_COOKIE])
4935                 return -EINVAL;
4936
4937         if (!rdev->ops->mgmt_tx_cancel_wait)
4938                 return -EOPNOTSUPP;
4939
4940         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4941             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4942             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4943             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4944             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4945             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4946                 return -EOPNOTSUPP;
4947
4948         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4949
4950         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
4951 }
4952
4953 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4954 {
4955         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4956         struct wireless_dev *wdev;
4957         struct net_device *dev = info->user_ptr[1];
4958         u8 ps_state;
4959         bool state;
4960         int err;
4961
4962         if (!info->attrs[NL80211_ATTR_PS_STATE])
4963                 return -EINVAL;
4964
4965         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4966
4967         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
4968                 return -EINVAL;
4969
4970         wdev = dev->ieee80211_ptr;
4971
4972         if (!rdev->ops->set_power_mgmt)
4973                 return -EOPNOTSUPP;
4974
4975         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4976
4977         if (state == wdev->ps)
4978                 return 0;
4979
4980         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
4981                                         wdev->ps_timeout);
4982         if (!err)
4983                 wdev->ps = state;
4984         return err;
4985 }
4986
4987 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4988 {
4989         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4990         enum nl80211_ps_state ps_state;
4991         struct wireless_dev *wdev;
4992         struct net_device *dev = info->user_ptr[1];
4993         struct sk_buff *msg;
4994         void *hdr;
4995         int err;
4996
4997         wdev = dev->ieee80211_ptr;
4998
4999         if (!rdev->ops->set_power_mgmt)
5000                 return -EOPNOTSUPP;
5001
5002         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5003         if (!msg)
5004                 return -ENOMEM;
5005
5006         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5007                              NL80211_CMD_GET_POWER_SAVE);
5008         if (!hdr) {
5009                 err = -ENOBUFS;
5010                 goto free_msg;
5011         }
5012
5013         if (wdev->ps)
5014                 ps_state = NL80211_PS_ENABLED;
5015         else
5016                 ps_state = NL80211_PS_DISABLED;
5017
5018         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5019
5020         genlmsg_end(msg, hdr);
5021         return genlmsg_reply(msg, info);
5022
5023  nla_put_failure:
5024         err = -ENOBUFS;
5025  free_msg:
5026         nlmsg_free(msg);
5027         return err;
5028 }
5029
5030 static struct nla_policy
5031 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5032         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5033         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5034         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5035 };
5036
5037 static int nl80211_set_cqm_rssi(struct genl_info *info,
5038                                 s32 threshold, u32 hysteresis)
5039 {
5040         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5041         struct wireless_dev *wdev;
5042         struct net_device *dev = info->user_ptr[1];
5043
5044         if (threshold > 0)
5045                 return -EINVAL;
5046
5047         wdev = dev->ieee80211_ptr;
5048
5049         if (!rdev->ops->set_cqm_rssi_config)
5050                 return -EOPNOTSUPP;
5051
5052         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5053             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5054                 return -EOPNOTSUPP;
5055
5056         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5057                                               threshold, hysteresis);
5058 }
5059
5060 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5061 {
5062         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5063         struct nlattr *cqm;
5064         int err;
5065
5066         cqm = info->attrs[NL80211_ATTR_CQM];
5067         if (!cqm) {
5068                 err = -EINVAL;
5069                 goto out;
5070         }
5071
5072         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5073                                nl80211_attr_cqm_policy);
5074         if (err)
5075                 goto out;
5076
5077         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5078             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5079                 s32 threshold;
5080                 u32 hysteresis;
5081                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5082                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5083                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5084         } else
5085                 err = -EINVAL;
5086
5087 out:
5088         return err;
5089 }
5090
5091 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5092 {
5093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5094         struct net_device *dev = info->user_ptr[1];
5095         struct mesh_config cfg;
5096         struct mesh_setup setup;
5097         int err;
5098
5099         /* start with default */
5100         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5101         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5102
5103         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5104                 /* and parse parameters if given */
5105                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5106                 if (err)
5107                         return err;
5108         }
5109
5110         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5111             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5112                 return -EINVAL;
5113
5114         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5115         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5116
5117         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5118                 /* parse additional setup parameters if given */
5119                 err = nl80211_parse_mesh_setup(info, &setup);
5120                 if (err)
5121                         return err;
5122         }
5123
5124         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5125 }
5126
5127 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5128 {
5129         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5130         struct net_device *dev = info->user_ptr[1];
5131
5132         return cfg80211_leave_mesh(rdev, dev);
5133 }
5134
5135 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5136 {
5137         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5138         struct sk_buff *msg;
5139         void *hdr;
5140
5141         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5142                 return -EOPNOTSUPP;
5143
5144         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5145         if (!msg)
5146                 return -ENOMEM;
5147
5148         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5149                              NL80211_CMD_GET_WOWLAN);
5150         if (!hdr)
5151                 goto nla_put_failure;
5152
5153         if (rdev->wowlan) {
5154                 struct nlattr *nl_wowlan;
5155
5156                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5157                 if (!nl_wowlan)
5158                         goto nla_put_failure;
5159
5160                 if (rdev->wowlan->any)
5161                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5162                 if (rdev->wowlan->disconnect)
5163                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5164                 if (rdev->wowlan->magic_pkt)
5165                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5166                 if (rdev->wowlan->n_patterns) {
5167                         struct nlattr *nl_pats, *nl_pat;
5168                         int i, pat_len;
5169
5170                         nl_pats = nla_nest_start(msg,
5171                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5172                         if (!nl_pats)
5173                                 goto nla_put_failure;
5174
5175                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5176                                 nl_pat = nla_nest_start(msg, i + 1);
5177                                 if (!nl_pat)
5178                                         goto nla_put_failure;
5179                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5180                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5181                                         DIV_ROUND_UP(pat_len, 8),
5182                                         rdev->wowlan->patterns[i].mask);
5183                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5184                                         pat_len,
5185                                         rdev->wowlan->patterns[i].pattern);
5186                                 nla_nest_end(msg, nl_pat);
5187                         }
5188                         nla_nest_end(msg, nl_pats);
5189                 }
5190
5191                 nla_nest_end(msg, nl_wowlan);
5192         }
5193
5194         genlmsg_end(msg, hdr);
5195         return genlmsg_reply(msg, info);
5196
5197 nla_put_failure:
5198         nlmsg_free(msg);
5199         return -ENOBUFS;
5200 }
5201
5202 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5203 {
5204         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5205         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5206         struct cfg80211_wowlan no_triggers = {};
5207         struct cfg80211_wowlan new_triggers = {};
5208         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5209         int err, i;
5210
5211         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5212                 return -EOPNOTSUPP;
5213
5214         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5215                 goto no_triggers;
5216
5217         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5218                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5219                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5220                         nl80211_wowlan_policy);
5221         if (err)
5222                 return err;
5223
5224         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
5225                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
5226                         return -EINVAL;
5227                 new_triggers.any = true;
5228         }
5229
5230         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
5231                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
5232                         return -EINVAL;
5233                 new_triggers.disconnect = true;
5234         }
5235
5236         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
5237                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
5238                         return -EINVAL;
5239                 new_triggers.magic_pkt = true;
5240         }
5241
5242         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
5243                 struct nlattr *pat;
5244                 int n_patterns = 0;
5245                 int rem, pat_len, mask_len;
5246                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
5247
5248                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5249                                     rem)
5250                         n_patterns++;
5251                 if (n_patterns > wowlan->n_patterns)
5252                         return -EINVAL;
5253
5254                 new_triggers.patterns = kcalloc(n_patterns,
5255                                                 sizeof(new_triggers.patterns[0]),
5256                                                 GFP_KERNEL);
5257                 if (!new_triggers.patterns)
5258                         return -ENOMEM;
5259
5260                 new_triggers.n_patterns = n_patterns;
5261                 i = 0;
5262
5263                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5264                                     rem) {
5265                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
5266                                   nla_data(pat), nla_len(pat), NULL);
5267                         err = -EINVAL;
5268                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
5269                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
5270                                 goto error;
5271                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
5272                         mask_len = DIV_ROUND_UP(pat_len, 8);
5273                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
5274                             mask_len)
5275                                 goto error;
5276                         if (pat_len > wowlan->pattern_max_len ||
5277                             pat_len < wowlan->pattern_min_len)
5278                                 goto error;
5279
5280                         new_triggers.patterns[i].mask =
5281                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
5282                         if (!new_triggers.patterns[i].mask) {
5283                                 err = -ENOMEM;
5284                                 goto error;
5285                         }
5286                         new_triggers.patterns[i].pattern =
5287                                 new_triggers.patterns[i].mask + mask_len;
5288                         memcpy(new_triggers.patterns[i].mask,
5289                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
5290                                mask_len);
5291                         new_triggers.patterns[i].pattern_len = pat_len;
5292                         memcpy(new_triggers.patterns[i].pattern,
5293                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
5294                                pat_len);
5295                         i++;
5296                 }
5297         }
5298
5299         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
5300                 struct cfg80211_wowlan *ntrig;
5301                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
5302                                 GFP_KERNEL);
5303                 if (!ntrig) {
5304                         err = -ENOMEM;
5305                         goto error;
5306                 }
5307                 cfg80211_rdev_free_wowlan(rdev);
5308                 rdev->wowlan = ntrig;
5309         } else {
5310  no_triggers:
5311                 cfg80211_rdev_free_wowlan(rdev);
5312                 rdev->wowlan = NULL;
5313         }
5314
5315         return 0;
5316  error:
5317         for (i = 0; i < new_triggers.n_patterns; i++)
5318                 kfree(new_triggers.patterns[i].mask);
5319         kfree(new_triggers.patterns);
5320         return err;
5321 }
5322
5323 #define NL80211_FLAG_NEED_WIPHY         0x01
5324 #define NL80211_FLAG_NEED_NETDEV        0x02
5325 #define NL80211_FLAG_NEED_RTNL          0x04
5326 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
5327 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
5328                                          NL80211_FLAG_CHECK_NETDEV_UP)
5329
5330 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
5331                             struct genl_info *info)
5332 {
5333         struct cfg80211_registered_device *rdev;
5334         struct net_device *dev;
5335         int err;
5336         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
5337
5338         if (rtnl)
5339                 rtnl_lock();
5340
5341         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
5342                 rdev = cfg80211_get_dev_from_info(info);
5343                 if (IS_ERR(rdev)) {
5344                         if (rtnl)
5345                                 rtnl_unlock();
5346                         return PTR_ERR(rdev);
5347                 }
5348                 info->user_ptr[0] = rdev;
5349         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
5350                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5351                 if (err) {
5352                         if (rtnl)
5353                                 rtnl_unlock();
5354                         return err;
5355                 }
5356                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
5357                     !netif_running(dev)) {
5358                         cfg80211_unlock_rdev(rdev);
5359                         dev_put(dev);
5360                         if (rtnl)
5361                                 rtnl_unlock();
5362                         return -ENETDOWN;
5363                 }
5364                 info->user_ptr[0] = rdev;
5365                 info->user_ptr[1] = dev;
5366         }
5367
5368         return 0;
5369 }
5370
5371 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
5372                               struct genl_info *info)
5373 {
5374         if (info->user_ptr[0])
5375                 cfg80211_unlock_rdev(info->user_ptr[0]);
5376         if (info->user_ptr[1])
5377                 dev_put(info->user_ptr[1]);
5378         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
5379                 rtnl_unlock();
5380 }
5381
5382 static struct genl_ops nl80211_ops[] = {
5383         {
5384                 .cmd = NL80211_CMD_GET_WIPHY,
5385                 .doit = nl80211_get_wiphy,
5386                 .dumpit = nl80211_dump_wiphy,
5387                 .policy = nl80211_policy,
5388                 /* can be retrieved by unprivileged users */
5389                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
5390         },
5391         {
5392                 .cmd = NL80211_CMD_SET_WIPHY,
5393                 .doit = nl80211_set_wiphy,
5394                 .policy = nl80211_policy,
5395                 .flags = GENL_ADMIN_PERM,
5396                 .internal_flags = NL80211_FLAG_NEED_RTNL,
5397         },
5398         {
5399                 .cmd = NL80211_CMD_GET_INTERFACE,
5400                 .doit = nl80211_get_interface,
5401                 .dumpit = nl80211_dump_interface,
5402                 .policy = nl80211_policy,
5403                 /* can be retrieved by unprivileged users */
5404                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
5405         },
5406         {
5407                 .cmd = NL80211_CMD_SET_INTERFACE,
5408                 .doit = nl80211_set_interface,
5409                 .policy = nl80211_policy,
5410                 .flags = GENL_ADMIN_PERM,
5411                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5412                                   NL80211_FLAG_NEED_RTNL,
5413         },
5414         {
5415                 .cmd = NL80211_CMD_NEW_INTERFACE,
5416                 .doit = nl80211_new_interface,
5417                 .policy = nl80211_policy,
5418                 .flags = GENL_ADMIN_PERM,
5419                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5420                                   NL80211_FLAG_NEED_RTNL,
5421         },
5422         {
5423                 .cmd = NL80211_CMD_DEL_INTERFACE,
5424                 .doit = nl80211_del_interface,
5425                 .policy = nl80211_policy,
5426                 .flags = GENL_ADMIN_PERM,
5427                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5428                                   NL80211_FLAG_NEED_RTNL,
5429         },
5430         {
5431                 .cmd = NL80211_CMD_GET_KEY,
5432                 .doit = nl80211_get_key,
5433                 .policy = nl80211_policy,
5434                 .flags = GENL_ADMIN_PERM,
5435                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5436                                   NL80211_FLAG_NEED_RTNL,
5437         },
5438         {
5439                 .cmd = NL80211_CMD_SET_KEY,
5440                 .doit = nl80211_set_key,
5441                 .policy = nl80211_policy,
5442                 .flags = GENL_ADMIN_PERM,
5443                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5444                                   NL80211_FLAG_NEED_RTNL,
5445         },
5446         {
5447                 .cmd = NL80211_CMD_NEW_KEY,
5448                 .doit = nl80211_new_key,
5449                 .policy = nl80211_policy,
5450                 .flags = GENL_ADMIN_PERM,
5451                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5452                                   NL80211_FLAG_NEED_RTNL,
5453         },
5454         {
5455                 .cmd = NL80211_CMD_DEL_KEY,
5456                 .doit = nl80211_del_key,
5457                 .policy = nl80211_policy,
5458                 .flags = GENL_ADMIN_PERM,
5459                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5460                                   NL80211_FLAG_NEED_RTNL,
5461         },
5462         {
5463                 .cmd = NL80211_CMD_SET_BEACON,
5464                 .policy = nl80211_policy,
5465                 .flags = GENL_ADMIN_PERM,
5466                 .doit = nl80211_addset_beacon,
5467                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5468                                   NL80211_FLAG_NEED_RTNL,
5469         },
5470         {
5471                 .cmd = NL80211_CMD_NEW_BEACON,
5472                 .policy = nl80211_policy,
5473                 .flags = GENL_ADMIN_PERM,
5474                 .doit = nl80211_addset_beacon,
5475                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5476                                   NL80211_FLAG_NEED_RTNL,
5477         },
5478         {
5479                 .cmd = NL80211_CMD_DEL_BEACON,
5480                 .policy = nl80211_policy,
5481                 .flags = GENL_ADMIN_PERM,
5482                 .doit = nl80211_del_beacon,
5483                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5484                                   NL80211_FLAG_NEED_RTNL,
5485         },
5486         {
5487                 .cmd = NL80211_CMD_GET_STATION,
5488                 .doit = nl80211_get_station,
5489                 .dumpit = nl80211_dump_station,
5490                 .policy = nl80211_policy,
5491                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5492                                   NL80211_FLAG_NEED_RTNL,
5493         },
5494         {
5495                 .cmd = NL80211_CMD_SET_STATION,
5496                 .doit = nl80211_set_station,
5497                 .policy = nl80211_policy,
5498                 .flags = GENL_ADMIN_PERM,
5499                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5500                                   NL80211_FLAG_NEED_RTNL,
5501         },
5502         {
5503                 .cmd = NL80211_CMD_NEW_STATION,
5504                 .doit = nl80211_new_station,
5505                 .policy = nl80211_policy,
5506                 .flags = GENL_ADMIN_PERM,
5507                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5508                                   NL80211_FLAG_NEED_RTNL,
5509         },
5510         {
5511                 .cmd = NL80211_CMD_DEL_STATION,
5512                 .doit = nl80211_del_station,
5513                 .policy = nl80211_policy,
5514                 .flags = GENL_ADMIN_PERM,
5515                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5516                                   NL80211_FLAG_NEED_RTNL,
5517         },
5518         {
5519                 .cmd = NL80211_CMD_GET_MPATH,
5520                 .doit = nl80211_get_mpath,
5521                 .dumpit = nl80211_dump_mpath,
5522                 .policy = nl80211_policy,
5523                 .flags = GENL_ADMIN_PERM,
5524                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5525                                   NL80211_FLAG_NEED_RTNL,
5526         },
5527         {
5528                 .cmd = NL80211_CMD_SET_MPATH,
5529                 .doit = nl80211_set_mpath,
5530                 .policy = nl80211_policy,
5531                 .flags = GENL_ADMIN_PERM,
5532                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5533                                   NL80211_FLAG_NEED_RTNL,
5534         },
5535         {
5536                 .cmd = NL80211_CMD_NEW_MPATH,
5537                 .doit = nl80211_new_mpath,
5538                 .policy = nl80211_policy,
5539                 .flags = GENL_ADMIN_PERM,
5540                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5541                                   NL80211_FLAG_NEED_RTNL,
5542         },
5543         {
5544                 .cmd = NL80211_CMD_DEL_MPATH,
5545                 .doit = nl80211_del_mpath,
5546                 .policy = nl80211_policy,
5547                 .flags = GENL_ADMIN_PERM,
5548                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5549                                   NL80211_FLAG_NEED_RTNL,
5550         },
5551         {
5552                 .cmd = NL80211_CMD_SET_BSS,
5553                 .doit = nl80211_set_bss,
5554                 .policy = nl80211_policy,
5555                 .flags = GENL_ADMIN_PERM,
5556                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5557                                   NL80211_FLAG_NEED_RTNL,
5558         },
5559         {
5560                 .cmd = NL80211_CMD_GET_REG,
5561                 .doit = nl80211_get_reg,
5562                 .policy = nl80211_policy,
5563                 /* can be retrieved by unprivileged users */
5564         },
5565         {
5566                 .cmd = NL80211_CMD_SET_REG,
5567                 .doit = nl80211_set_reg,
5568                 .policy = nl80211_policy,
5569                 .flags = GENL_ADMIN_PERM,
5570         },
5571         {
5572                 .cmd = NL80211_CMD_REQ_SET_REG,
5573                 .doit = nl80211_req_set_reg,
5574                 .policy = nl80211_policy,
5575                 .flags = GENL_ADMIN_PERM,
5576         },
5577         {
5578                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
5579                 .doit = nl80211_get_mesh_config,
5580                 .policy = nl80211_policy,
5581                 /* can be retrieved by unprivileged users */
5582                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5583                                   NL80211_FLAG_NEED_RTNL,
5584         },
5585         {
5586                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
5587                 .doit = nl80211_update_mesh_config,
5588                 .policy = nl80211_policy,
5589                 .flags = GENL_ADMIN_PERM,
5590                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5591                                   NL80211_FLAG_NEED_RTNL,
5592         },
5593         {
5594                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5595                 .doit = nl80211_trigger_scan,
5596                 .policy = nl80211_policy,
5597                 .flags = GENL_ADMIN_PERM,
5598                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5599                                   NL80211_FLAG_NEED_RTNL,
5600         },
5601         {
5602                 .cmd = NL80211_CMD_GET_SCAN,
5603                 .policy = nl80211_policy,
5604                 .dumpit = nl80211_dump_scan,
5605         },
5606         {
5607                 .cmd = NL80211_CMD_START_SCHED_SCAN,
5608                 .doit = nl80211_start_sched_scan,
5609                 .policy = nl80211_policy,
5610                 .flags = GENL_ADMIN_PERM,
5611                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5612                                   NL80211_FLAG_NEED_RTNL,
5613         },
5614         {
5615                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
5616                 .doit = nl80211_stop_sched_scan,
5617                 .policy = nl80211_policy,
5618                 .flags = GENL_ADMIN_PERM,
5619                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5620                                   NL80211_FLAG_NEED_RTNL,
5621         },
5622         {
5623                 .cmd = NL80211_CMD_AUTHENTICATE,
5624                 .doit = nl80211_authenticate,
5625                 .policy = nl80211_policy,
5626                 .flags = GENL_ADMIN_PERM,
5627                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5628                                   NL80211_FLAG_NEED_RTNL,
5629         },
5630         {
5631                 .cmd = NL80211_CMD_ASSOCIATE,
5632                 .doit = nl80211_associate,
5633                 .policy = nl80211_policy,
5634                 .flags = GENL_ADMIN_PERM,
5635                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5636                                   NL80211_FLAG_NEED_RTNL,
5637         },
5638         {
5639                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5640                 .doit = nl80211_deauthenticate,
5641                 .policy = nl80211_policy,
5642                 .flags = GENL_ADMIN_PERM,
5643                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5644                                   NL80211_FLAG_NEED_RTNL,
5645         },
5646         {
5647                 .cmd = NL80211_CMD_DISASSOCIATE,
5648                 .doit = nl80211_disassociate,
5649                 .policy = nl80211_policy,
5650                 .flags = GENL_ADMIN_PERM,
5651                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5652                                   NL80211_FLAG_NEED_RTNL,
5653         },
5654         {
5655                 .cmd = NL80211_CMD_JOIN_IBSS,
5656                 .doit = nl80211_join_ibss,
5657                 .policy = nl80211_policy,
5658                 .flags = GENL_ADMIN_PERM,
5659                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5660                                   NL80211_FLAG_NEED_RTNL,
5661         },
5662         {
5663                 .cmd = NL80211_CMD_LEAVE_IBSS,
5664                 .doit = nl80211_leave_ibss,
5665                 .policy = nl80211_policy,
5666                 .flags = GENL_ADMIN_PERM,
5667                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5668                                   NL80211_FLAG_NEED_RTNL,
5669         },
5670 #ifdef CONFIG_NL80211_TESTMODE
5671         {
5672                 .cmd = NL80211_CMD_TESTMODE,
5673                 .doit = nl80211_testmode_do,
5674                 .policy = nl80211_policy,
5675                 .flags = GENL_ADMIN_PERM,
5676                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5677                                   NL80211_FLAG_NEED_RTNL,
5678         },
5679 #endif
5680         {
5681                 .cmd = NL80211_CMD_CONNECT,
5682                 .doit = nl80211_connect,
5683                 .policy = nl80211_policy,
5684                 .flags = GENL_ADMIN_PERM,
5685                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5686                                   NL80211_FLAG_NEED_RTNL,
5687         },
5688         {
5689                 .cmd = NL80211_CMD_DISCONNECT,
5690                 .doit = nl80211_disconnect,
5691                 .policy = nl80211_policy,
5692                 .flags = GENL_ADMIN_PERM,
5693                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5694                                   NL80211_FLAG_NEED_RTNL,
5695         },
5696         {
5697                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5698                 .doit = nl80211_wiphy_netns,
5699                 .policy = nl80211_policy,
5700                 .flags = GENL_ADMIN_PERM,
5701                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5702                                   NL80211_FLAG_NEED_RTNL,
5703         },
5704         {
5705                 .cmd = NL80211_CMD_GET_SURVEY,
5706                 .policy = nl80211_policy,
5707                 .dumpit = nl80211_dump_survey,
5708         },
5709         {
5710                 .cmd = NL80211_CMD_SET_PMKSA,
5711                 .doit = nl80211_setdel_pmksa,
5712                 .policy = nl80211_policy,
5713                 .flags = GENL_ADMIN_PERM,
5714                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5715                                   NL80211_FLAG_NEED_RTNL,
5716         },
5717         {
5718                 .cmd = NL80211_CMD_DEL_PMKSA,
5719                 .doit = nl80211_setdel_pmksa,
5720                 .policy = nl80211_policy,
5721                 .flags = GENL_ADMIN_PERM,
5722                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5723                                   NL80211_FLAG_NEED_RTNL,
5724         },
5725         {
5726                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5727                 .doit = nl80211_flush_pmksa,
5728                 .policy = nl80211_policy,
5729                 .flags = GENL_ADMIN_PERM,
5730                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5731                                   NL80211_FLAG_NEED_RTNL,
5732         },
5733         {
5734                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5735                 .doit = nl80211_remain_on_channel,
5736                 .policy = nl80211_policy,
5737                 .flags = GENL_ADMIN_PERM,
5738                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5739                                   NL80211_FLAG_NEED_RTNL,
5740         },
5741         {
5742                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5743                 .doit = nl80211_cancel_remain_on_channel,
5744                 .policy = nl80211_policy,
5745                 .flags = GENL_ADMIN_PERM,
5746                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5747                                   NL80211_FLAG_NEED_RTNL,
5748         },
5749         {
5750                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5751                 .doit = nl80211_set_tx_bitrate_mask,
5752                 .policy = nl80211_policy,
5753                 .flags = GENL_ADMIN_PERM,
5754                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5755                                   NL80211_FLAG_NEED_RTNL,
5756         },
5757         {
5758                 .cmd = NL80211_CMD_REGISTER_FRAME,
5759                 .doit = nl80211_register_mgmt,
5760                 .policy = nl80211_policy,
5761                 .flags = GENL_ADMIN_PERM,
5762                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5763                                   NL80211_FLAG_NEED_RTNL,
5764         },
5765         {
5766                 .cmd = NL80211_CMD_FRAME,
5767                 .doit = nl80211_tx_mgmt,
5768                 .policy = nl80211_policy,
5769                 .flags = GENL_ADMIN_PERM,
5770                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5771                                   NL80211_FLAG_NEED_RTNL,
5772         },
5773         {
5774                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5775                 .doit = nl80211_tx_mgmt_cancel_wait,
5776                 .policy = nl80211_policy,
5777                 .flags = GENL_ADMIN_PERM,
5778                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5779                                   NL80211_FLAG_NEED_RTNL,
5780         },
5781         {
5782                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5783                 .doit = nl80211_set_power_save,
5784                 .policy = nl80211_policy,
5785                 .flags = GENL_ADMIN_PERM,
5786                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5787                                   NL80211_FLAG_NEED_RTNL,
5788         },
5789         {
5790                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5791                 .doit = nl80211_get_power_save,
5792                 .policy = nl80211_policy,
5793                 /* can be retrieved by unprivileged users */
5794                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5795                                   NL80211_FLAG_NEED_RTNL,
5796         },
5797         {
5798                 .cmd = NL80211_CMD_SET_CQM,
5799                 .doit = nl80211_set_cqm,
5800                 .policy = nl80211_policy,
5801                 .flags = GENL_ADMIN_PERM,
5802                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5803                                   NL80211_FLAG_NEED_RTNL,
5804         },
5805         {
5806                 .cmd = NL80211_CMD_SET_CHANNEL,
5807                 .doit = nl80211_set_channel,
5808                 .policy = nl80211_policy,
5809                 .flags = GENL_ADMIN_PERM,
5810                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5811                                   NL80211_FLAG_NEED_RTNL,
5812         },
5813         {
5814                 .cmd = NL80211_CMD_SET_WDS_PEER,
5815                 .doit = nl80211_set_wds_peer,
5816                 .policy = nl80211_policy,
5817                 .flags = GENL_ADMIN_PERM,
5818                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5819                                   NL80211_FLAG_NEED_RTNL,
5820         },
5821         {
5822                 .cmd = NL80211_CMD_JOIN_MESH,
5823                 .doit = nl80211_join_mesh,
5824                 .policy = nl80211_policy,
5825                 .flags = GENL_ADMIN_PERM,
5826                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5827                                   NL80211_FLAG_NEED_RTNL,
5828         },
5829         {
5830                 .cmd = NL80211_CMD_LEAVE_MESH,
5831                 .doit = nl80211_leave_mesh,
5832                 .policy = nl80211_policy,
5833                 .flags = GENL_ADMIN_PERM,
5834                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5835                                   NL80211_FLAG_NEED_RTNL,
5836         },
5837         {
5838                 .cmd = NL80211_CMD_GET_WOWLAN,
5839                 .doit = nl80211_get_wowlan,
5840                 .policy = nl80211_policy,
5841                 /* can be retrieved by unprivileged users */
5842                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5843                                   NL80211_FLAG_NEED_RTNL,
5844         },
5845         {
5846                 .cmd = NL80211_CMD_SET_WOWLAN,
5847                 .doit = nl80211_set_wowlan,
5848                 .policy = nl80211_policy,
5849                 .flags = GENL_ADMIN_PERM,
5850                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5851                                   NL80211_FLAG_NEED_RTNL,
5852         },
5853 };
5854
5855 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5856         .name = "mlme",
5857 };
5858
5859 /* multicast groups */
5860 static struct genl_multicast_group nl80211_config_mcgrp = {
5861         .name = "config",
5862 };
5863 static struct genl_multicast_group nl80211_scan_mcgrp = {
5864         .name = "scan",
5865 };
5866 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5867         .name = "regulatory",
5868 };
5869
5870 /* notification functions */
5871
5872 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5873 {
5874         struct sk_buff *msg;
5875
5876         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5877         if (!msg)
5878                 return;
5879
5880         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5881                 nlmsg_free(msg);
5882                 return;
5883         }
5884
5885         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5886                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5887 }
5888
5889 static int nl80211_add_scan_req(struct sk_buff *msg,
5890                                 struct cfg80211_registered_device *rdev)
5891 {
5892         struct cfg80211_scan_request *req = rdev->scan_req;
5893         struct nlattr *nest;
5894         int i;
5895
5896         ASSERT_RDEV_LOCK(rdev);
5897
5898         if (WARN_ON(!req))
5899                 return 0;
5900
5901         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5902         if (!nest)
5903                 goto nla_put_failure;
5904         for (i = 0; i < req->n_ssids; i++)
5905                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5906         nla_nest_end(msg, nest);
5907
5908         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5909         if (!nest)
5910                 goto nla_put_failure;
5911         for (i = 0; i < req->n_channels; i++)
5912                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5913         nla_nest_end(msg, nest);
5914
5915         if (req->ie)
5916                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5917
5918         return 0;
5919  nla_put_failure:
5920         return -ENOBUFS;
5921 }
5922
5923 static int nl80211_send_scan_msg(struct sk_buff *msg,
5924                                  struct cfg80211_registered_device *rdev,
5925                                  struct net_device *netdev,
5926                                  u32 pid, u32 seq, int flags,
5927                                  u32 cmd)
5928 {
5929         void *hdr;
5930
5931         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5932         if (!hdr)
5933                 return -1;
5934
5935         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5936         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5937
5938         /* ignore errors and send incomplete event anyway */
5939         nl80211_add_scan_req(msg, rdev);
5940
5941         return genlmsg_end(msg, hdr);
5942
5943  nla_put_failure:
5944         genlmsg_cancel(msg, hdr);
5945         return -EMSGSIZE;
5946 }
5947
5948 static int
5949 nl80211_send_sched_scan_msg(struct sk_buff *msg,
5950                             struct cfg80211_registered_device *rdev,
5951                             struct net_device *netdev,
5952                             u32 pid, u32 seq, int flags, u32 cmd)
5953 {
5954         void *hdr;
5955
5956         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5957         if (!hdr)
5958                 return -1;
5959
5960         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5961         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5962
5963         return genlmsg_end(msg, hdr);
5964
5965  nla_put_failure:
5966         genlmsg_cancel(msg, hdr);
5967         return -EMSGSIZE;
5968 }
5969
5970 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5971                              struct net_device *netdev)
5972 {
5973         struct sk_buff *msg;
5974
5975         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5976         if (!msg)
5977                 return;
5978
5979         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5980                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5981                 nlmsg_free(msg);
5982                 return;
5983         }
5984
5985         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5986                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5987 }
5988
5989 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5990                             struct net_device *netdev)
5991 {
5992         struct sk_buff *msg;
5993
5994         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5995         if (!msg)
5996                 return;
5997
5998         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5999                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
6000                 nlmsg_free(msg);
6001                 return;
6002         }
6003
6004         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6005                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6006 }
6007
6008 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
6009                                struct net_device *netdev)
6010 {
6011         struct sk_buff *msg;
6012
6013         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6014         if (!msg)
6015                 return;
6016
6017         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6018                                   NL80211_CMD_SCAN_ABORTED) < 0) {
6019                 nlmsg_free(msg);
6020                 return;
6021         }
6022
6023         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6024                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6025 }
6026
6027 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
6028                                      struct net_device *netdev)
6029 {
6030         struct sk_buff *msg;
6031
6032         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6033         if (!msg)
6034                 return;
6035
6036         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
6037                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
6038                 nlmsg_free(msg);
6039                 return;
6040         }
6041
6042         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6043                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6044 }
6045
6046 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
6047                              struct net_device *netdev, u32 cmd)
6048 {
6049         struct sk_buff *msg;
6050
6051         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6052         if (!msg)
6053                 return;
6054
6055         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
6056                 nlmsg_free(msg);
6057                 return;
6058         }
6059
6060         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6061                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6062 }
6063
6064 /*
6065  * This can happen on global regulatory changes or device specific settings
6066  * based on custom world regulatory domains.
6067  */
6068 void nl80211_send_reg_change_event(struct regulatory_request *request)
6069 {
6070         struct sk_buff *msg;
6071         void *hdr;
6072
6073         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6074         if (!msg)
6075                 return;
6076
6077         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
6078         if (!hdr) {
6079                 nlmsg_free(msg);
6080                 return;
6081         }
6082
6083         /* Userspace can always count this one always being set */
6084         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
6085
6086         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
6087                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6088                            NL80211_REGDOM_TYPE_WORLD);
6089         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
6090                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6091                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
6092         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
6093                  request->intersect)
6094                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6095                            NL80211_REGDOM_TYPE_INTERSECTION);
6096         else {
6097                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6098                            NL80211_REGDOM_TYPE_COUNTRY);
6099                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
6100         }
6101
6102         if (wiphy_idx_valid(request->wiphy_idx))
6103                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
6104
6105         if (genlmsg_end(msg, hdr) < 0) {
6106                 nlmsg_free(msg);
6107                 return;
6108         }
6109
6110         rcu_read_lock();
6111         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6112                                 GFP_ATOMIC);
6113         rcu_read_unlock();
6114
6115         return;
6116
6117 nla_put_failure:
6118         genlmsg_cancel(msg, hdr);
6119         nlmsg_free(msg);
6120 }
6121
6122 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
6123                                     struct net_device *netdev,
6124                                     const u8 *buf, size_t len,
6125                                     enum nl80211_commands cmd, gfp_t gfp)
6126 {
6127         struct sk_buff *msg;
6128         void *hdr;
6129
6130         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6131         if (!msg)
6132                 return;
6133
6134         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6135         if (!hdr) {
6136                 nlmsg_free(msg);
6137                 return;
6138         }
6139
6140         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6141         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6142         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6143
6144         if (genlmsg_end(msg, hdr) < 0) {
6145                 nlmsg_free(msg);
6146                 return;
6147         }
6148
6149         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6150                                 nl80211_mlme_mcgrp.id, gfp);
6151         return;
6152
6153  nla_put_failure:
6154         genlmsg_cancel(msg, hdr);
6155         nlmsg_free(msg);
6156 }
6157
6158 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
6159                           struct net_device *netdev, const u8 *buf,
6160                           size_t len, gfp_t gfp)
6161 {
6162         nl80211_send_mlme_event(rdev, netdev, buf, len,
6163                                 NL80211_CMD_AUTHENTICATE, gfp);
6164 }
6165
6166 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
6167                            struct net_device *netdev, const u8 *buf,
6168                            size_t len, gfp_t gfp)
6169 {
6170         nl80211_send_mlme_event(rdev, netdev, buf, len,
6171                                 NL80211_CMD_ASSOCIATE, gfp);
6172 }
6173
6174 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
6175                          struct net_device *netdev, const u8 *buf,
6176                          size_t len, gfp_t gfp)
6177 {
6178         nl80211_send_mlme_event(rdev, netdev, buf, len,
6179                                 NL80211_CMD_DEAUTHENTICATE, gfp);
6180 }
6181
6182 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
6183                            struct net_device *netdev, const u8 *buf,
6184                            size_t len, gfp_t gfp)
6185 {
6186         nl80211_send_mlme_event(rdev, netdev, buf, len,
6187                                 NL80211_CMD_DISASSOCIATE, gfp);
6188 }
6189
6190 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
6191                                 struct net_device *netdev, const u8 *buf,
6192                                 size_t len, gfp_t gfp)
6193 {
6194         nl80211_send_mlme_event(rdev, netdev, buf, len,
6195                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
6196 }
6197
6198 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
6199                                   struct net_device *netdev, const u8 *buf,
6200                                   size_t len, gfp_t gfp)
6201 {
6202         nl80211_send_mlme_event(rdev, netdev, buf, len,
6203                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
6204 }
6205
6206 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
6207                                       struct net_device *netdev, int cmd,
6208                                       const u8 *addr, gfp_t gfp)
6209 {
6210         struct sk_buff *msg;
6211         void *hdr;
6212
6213         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6214         if (!msg)
6215                 return;
6216
6217         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6218         if (!hdr) {
6219                 nlmsg_free(msg);
6220                 return;
6221         }
6222
6223         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6224         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6225         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
6226         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6227
6228         if (genlmsg_end(msg, hdr) < 0) {
6229                 nlmsg_free(msg);
6230                 return;
6231         }
6232
6233         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6234                                 nl80211_mlme_mcgrp.id, gfp);
6235         return;
6236
6237  nla_put_failure:
6238         genlmsg_cancel(msg, hdr);
6239         nlmsg_free(msg);
6240 }
6241
6242 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
6243                                struct net_device *netdev, const u8 *addr,
6244                                gfp_t gfp)
6245 {
6246         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
6247                                   addr, gfp);
6248 }
6249
6250 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
6251                                 struct net_device *netdev, const u8 *addr,
6252                                 gfp_t gfp)
6253 {
6254         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
6255                                   addr, gfp);
6256 }
6257
6258 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
6259                                  struct net_device *netdev, const u8 *bssid,
6260                                  const u8 *req_ie, size_t req_ie_len,
6261                                  const u8 *resp_ie, size_t resp_ie_len,
6262                                  u16 status, gfp_t gfp)
6263 {
6264         struct sk_buff *msg;
6265         void *hdr;
6266
6267         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6268         if (!msg)
6269                 return;
6270
6271         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
6272         if (!hdr) {
6273                 nlmsg_free(msg);
6274                 return;
6275         }
6276
6277         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6278         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6279         if (bssid)
6280                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6281         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
6282         if (req_ie)
6283                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6284         if (resp_ie)
6285                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6286
6287         if (genlmsg_end(msg, hdr) < 0) {
6288                 nlmsg_free(msg);
6289                 return;
6290         }
6291
6292         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6293                                 nl80211_mlme_mcgrp.id, gfp);
6294         return;
6295
6296  nla_put_failure:
6297         genlmsg_cancel(msg, hdr);
6298         nlmsg_free(msg);
6299
6300 }
6301
6302 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
6303                          struct net_device *netdev, const u8 *bssid,
6304                          const u8 *req_ie, size_t req_ie_len,
6305                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
6306 {
6307         struct sk_buff *msg;
6308         void *hdr;
6309
6310         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6311         if (!msg)
6312                 return;
6313
6314         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
6315         if (!hdr) {
6316                 nlmsg_free(msg);
6317                 return;
6318         }
6319
6320         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6321         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6322         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6323         if (req_ie)
6324                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6325         if (resp_ie)
6326                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6327
6328         if (genlmsg_end(msg, hdr) < 0) {
6329                 nlmsg_free(msg);
6330                 return;
6331         }
6332
6333         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6334                                 nl80211_mlme_mcgrp.id, gfp);
6335         return;
6336
6337  nla_put_failure:
6338         genlmsg_cancel(msg, hdr);
6339         nlmsg_free(msg);
6340
6341 }
6342
6343 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
6344                                struct net_device *netdev, u16 reason,
6345                                const u8 *ie, size_t ie_len, bool from_ap)
6346 {
6347         struct sk_buff *msg;
6348         void *hdr;
6349
6350         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6351         if (!msg)
6352                 return;
6353
6354         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
6355         if (!hdr) {
6356                 nlmsg_free(msg);
6357                 return;
6358         }
6359
6360         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6361         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6362         if (from_ap && reason)
6363                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
6364         if (from_ap)
6365                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
6366         if (ie)
6367                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
6368
6369         if (genlmsg_end(msg, hdr) < 0) {
6370                 nlmsg_free(msg);
6371                 return;
6372         }
6373
6374         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6375                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
6376         return;
6377
6378  nla_put_failure:
6379         genlmsg_cancel(msg, hdr);
6380         nlmsg_free(msg);
6381
6382 }
6383
6384 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
6385                              struct net_device *netdev, const u8 *bssid,
6386                              gfp_t gfp)
6387 {
6388         struct sk_buff *msg;
6389         void *hdr;
6390
6391         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6392         if (!msg)
6393                 return;
6394
6395         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
6396         if (!hdr) {
6397                 nlmsg_free(msg);
6398                 return;
6399         }
6400
6401         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6402         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6403         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6404
6405         if (genlmsg_end(msg, hdr) < 0) {
6406                 nlmsg_free(msg);
6407                 return;
6408         }
6409
6410         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6411                                 nl80211_mlme_mcgrp.id, gfp);
6412         return;
6413
6414  nla_put_failure:
6415         genlmsg_cancel(msg, hdr);
6416         nlmsg_free(msg);
6417 }
6418
6419 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
6420                 struct net_device *netdev,
6421                 const u8 *macaddr, const u8* ie, u8 ie_len,
6422                 gfp_t gfp)
6423 {
6424         struct sk_buff *msg;
6425         void *hdr;
6426
6427         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6428         if (!msg)
6429                 return;
6430
6431         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
6432         if (!hdr) {
6433                 nlmsg_free(msg);
6434                 return;
6435         }
6436
6437         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6438         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6439         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
6440         if (ie_len && ie)
6441                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
6442
6443         if (genlmsg_end(msg, hdr) < 0) {
6444                 nlmsg_free(msg);
6445                 return;
6446         }
6447
6448         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6449                                 nl80211_mlme_mcgrp.id, gfp);
6450         return;
6451
6452  nla_put_failure:
6453         genlmsg_cancel(msg, hdr);
6454         nlmsg_free(msg);
6455 }
6456
6457 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
6458                                  struct net_device *netdev, const u8 *addr,
6459                                  enum nl80211_key_type key_type, int key_id,
6460                                  const u8 *tsc, gfp_t gfp)
6461 {
6462         struct sk_buff *msg;
6463         void *hdr;
6464
6465         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6466         if (!msg)
6467                 return;
6468
6469         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
6470         if (!hdr) {
6471                 nlmsg_free(msg);
6472                 return;
6473         }
6474
6475         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6476         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6477         if (addr)
6478                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6479         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
6480         if (key_id != -1)
6481                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
6482         if (tsc)
6483                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
6484
6485         if (genlmsg_end(msg, hdr) < 0) {
6486                 nlmsg_free(msg);
6487                 return;
6488         }
6489
6490         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6491                                 nl80211_mlme_mcgrp.id, gfp);
6492         return;
6493
6494  nla_put_failure:
6495         genlmsg_cancel(msg, hdr);
6496         nlmsg_free(msg);
6497 }
6498
6499 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
6500                                     struct ieee80211_channel *channel_before,
6501                                     struct ieee80211_channel *channel_after)
6502 {
6503         struct sk_buff *msg;
6504         void *hdr;
6505         struct nlattr *nl_freq;
6506
6507         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
6508         if (!msg)
6509                 return;
6510
6511         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
6512         if (!hdr) {
6513                 nlmsg_free(msg);
6514                 return;
6515         }
6516
6517         /*
6518          * Since we are applying the beacon hint to a wiphy we know its
6519          * wiphy_idx is valid
6520          */
6521         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
6522
6523         /* Before */
6524         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
6525         if (!nl_freq)
6526                 goto nla_put_failure;
6527         if (nl80211_msg_put_channel(msg, channel_before))
6528                 goto nla_put_failure;
6529         nla_nest_end(msg, nl_freq);
6530
6531         /* After */
6532         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
6533         if (!nl_freq)
6534                 goto nla_put_failure;
6535         if (nl80211_msg_put_channel(msg, channel_after))
6536                 goto nla_put_failure;
6537         nla_nest_end(msg, nl_freq);
6538
6539         if (genlmsg_end(msg, hdr) < 0) {
6540                 nlmsg_free(msg);
6541                 return;
6542         }
6543
6544         rcu_read_lock();
6545         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6546                                 GFP_ATOMIC);
6547         rcu_read_unlock();
6548
6549         return;
6550
6551 nla_put_failure:
6552         genlmsg_cancel(msg, hdr);
6553         nlmsg_free(msg);
6554 }
6555
6556 static void nl80211_send_remain_on_chan_event(
6557         int cmd, struct cfg80211_registered_device *rdev,
6558         struct net_device *netdev, u64 cookie,
6559         struct ieee80211_channel *chan,
6560         enum nl80211_channel_type channel_type,
6561         unsigned int duration, gfp_t gfp)
6562 {
6563         struct sk_buff *msg;
6564         void *hdr;
6565
6566         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6567         if (!msg)
6568                 return;
6569
6570         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6571         if (!hdr) {
6572                 nlmsg_free(msg);
6573                 return;
6574         }
6575
6576         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6577         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6578         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
6579         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
6580         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6581
6582         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
6583                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
6584
6585         if (genlmsg_end(msg, hdr) < 0) {
6586                 nlmsg_free(msg);
6587                 return;
6588         }
6589
6590         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6591                                 nl80211_mlme_mcgrp.id, gfp);
6592         return;
6593
6594  nla_put_failure:
6595         genlmsg_cancel(msg, hdr);
6596         nlmsg_free(msg);
6597 }
6598
6599 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
6600                                     struct net_device *netdev, u64 cookie,
6601                                     struct ieee80211_channel *chan,
6602                                     enum nl80211_channel_type channel_type,
6603                                     unsigned int duration, gfp_t gfp)
6604 {
6605         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
6606                                           rdev, netdev, cookie, chan,
6607                                           channel_type, duration, gfp);
6608 }
6609
6610 void nl80211_send_remain_on_channel_cancel(
6611         struct cfg80211_registered_device *rdev, struct net_device *netdev,
6612         u64 cookie, struct ieee80211_channel *chan,
6613         enum nl80211_channel_type channel_type, gfp_t gfp)
6614 {
6615         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6616                                           rdev, netdev, cookie, chan,
6617                                           channel_type, 0, gfp);
6618 }
6619
6620 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
6621                             struct net_device *dev, const u8 *mac_addr,
6622                             struct station_info *sinfo, gfp_t gfp)
6623 {
6624         struct sk_buff *msg;
6625
6626         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6627         if (!msg)
6628                 return;
6629
6630         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6631                 nlmsg_free(msg);
6632                 return;
6633         }
6634
6635         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6636                                 nl80211_mlme_mcgrp.id, gfp);
6637 }
6638
6639 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
6640                                 struct net_device *dev, const u8 *mac_addr,
6641                                 gfp_t gfp)
6642 {
6643         struct sk_buff *msg;
6644         void *hdr;
6645
6646         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6647         if (!msg)
6648                 return;
6649
6650         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
6651         if (!hdr) {
6652                 nlmsg_free(msg);
6653                 return;
6654         }
6655
6656         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
6657         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
6658
6659         if (genlmsg_end(msg, hdr) < 0) {
6660                 nlmsg_free(msg);
6661                 return;
6662         }
6663
6664         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6665                                 nl80211_mlme_mcgrp.id, gfp);
6666         return;
6667
6668  nla_put_failure:
6669         genlmsg_cancel(msg, hdr);
6670         nlmsg_free(msg);
6671 }
6672
6673 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
6674                       struct net_device *netdev, u32 nlpid,
6675                       int freq, const u8 *buf, size_t len, gfp_t gfp)
6676 {
6677         struct sk_buff *msg;
6678         void *hdr;
6679         int err;
6680
6681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6682         if (!msg)
6683                 return -ENOMEM;
6684
6685         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
6686         if (!hdr) {
6687                 nlmsg_free(msg);
6688                 return -ENOMEM;
6689         }
6690
6691         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6692         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6693         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6694         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6695
6696         err = genlmsg_end(msg, hdr);
6697         if (err < 0) {
6698                 nlmsg_free(msg);
6699                 return err;
6700         }
6701
6702         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6703         if (err < 0)
6704                 return err;
6705         return 0;
6706
6707  nla_put_failure:
6708         genlmsg_cancel(msg, hdr);
6709         nlmsg_free(msg);
6710         return -ENOBUFS;
6711 }
6712
6713 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
6714                                  struct net_device *netdev, u64 cookie,
6715                                  const u8 *buf, size_t len, bool ack,
6716                                  gfp_t gfp)
6717 {
6718         struct sk_buff *msg;
6719         void *hdr;
6720
6721         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6722         if (!msg)
6723                 return;
6724
6725         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6726         if (!hdr) {
6727                 nlmsg_free(msg);
6728                 return;
6729         }
6730
6731         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6732         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6733         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6734         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6735         if (ack)
6736                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6737
6738         if (genlmsg_end(msg, hdr) < 0) {
6739                 nlmsg_free(msg);
6740                 return;
6741         }
6742
6743         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6744         return;
6745
6746  nla_put_failure:
6747         genlmsg_cancel(msg, hdr);
6748         nlmsg_free(msg);
6749 }
6750
6751 void
6752 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6753                              struct net_device *netdev,
6754                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6755                              gfp_t gfp)
6756 {
6757         struct sk_buff *msg;
6758         struct nlattr *pinfoattr;
6759         void *hdr;
6760
6761         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6762         if (!msg)
6763                 return;
6764
6765         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6766         if (!hdr) {
6767                 nlmsg_free(msg);
6768                 return;
6769         }
6770
6771         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6772         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6773
6774         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6775         if (!pinfoattr)
6776                 goto nla_put_failure;
6777
6778         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6779                     rssi_event);
6780
6781         nla_nest_end(msg, pinfoattr);
6782
6783         if (genlmsg_end(msg, hdr) < 0) {
6784                 nlmsg_free(msg);
6785                 return;
6786         }
6787
6788         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6789                                 nl80211_mlme_mcgrp.id, gfp);
6790         return;
6791
6792  nla_put_failure:
6793         genlmsg_cancel(msg, hdr);
6794         nlmsg_free(msg);
6795 }
6796
6797 void
6798 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
6799                                 struct net_device *netdev, const u8 *peer,
6800                                 u32 num_packets, gfp_t gfp)
6801 {
6802         struct sk_buff *msg;
6803         struct nlattr *pinfoattr;
6804         void *hdr;
6805
6806         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6807         if (!msg)
6808                 return;
6809
6810         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6811         if (!hdr) {
6812                 nlmsg_free(msg);
6813                 return;
6814         }
6815
6816         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6817         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6818         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6819
6820         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6821         if (!pinfoattr)
6822                 goto nla_put_failure;
6823
6824         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6825
6826         nla_nest_end(msg, pinfoattr);
6827
6828         if (genlmsg_end(msg, hdr) < 0) {
6829                 nlmsg_free(msg);
6830                 return;
6831         }
6832
6833         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6834                                 nl80211_mlme_mcgrp.id, gfp);
6835         return;
6836
6837  nla_put_failure:
6838         genlmsg_cancel(msg, hdr);
6839         nlmsg_free(msg);
6840 }
6841
6842 static int nl80211_netlink_notify(struct notifier_block * nb,
6843                                   unsigned long state,
6844                                   void *_notify)
6845 {
6846         struct netlink_notify *notify = _notify;
6847         struct cfg80211_registered_device *rdev;
6848         struct wireless_dev *wdev;
6849
6850         if (state != NETLINK_URELEASE)
6851                 return NOTIFY_DONE;
6852
6853         rcu_read_lock();
6854
6855         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6856                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6857                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6858
6859         rcu_read_unlock();
6860
6861         return NOTIFY_DONE;
6862 }
6863
6864 static struct notifier_block nl80211_netlink_notifier = {
6865         .notifier_call = nl80211_netlink_notify,
6866 };
6867
6868 /* initialisation/exit functions */
6869
6870 int nl80211_init(void)
6871 {
6872         int err;
6873
6874         err = genl_register_family_with_ops(&nl80211_fam,
6875                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6876         if (err)
6877                 return err;
6878
6879         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6880         if (err)
6881                 goto err_out;
6882
6883         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6884         if (err)
6885                 goto err_out;
6886
6887         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6888         if (err)
6889                 goto err_out;
6890
6891         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6892         if (err)
6893                 goto err_out;
6894
6895 #ifdef CONFIG_NL80211_TESTMODE
6896         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6897         if (err)
6898                 goto err_out;
6899 #endif
6900
6901         err = netlink_register_notifier(&nl80211_netlink_notifier);
6902         if (err)
6903                 goto err_out;
6904
6905         return 0;
6906  err_out:
6907         genl_unregister_family(&nl80211_fam);
6908         return err;
6909 }
6910
6911 void nl80211_exit(void)
6912 {
6913         netlink_unregister_notifier(&nl80211_netlink_notifier);
6914         genl_unregister_family(&nl80211_fam);
6915 }