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 bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* internal helper: get rdev and dev */
  50 static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs,
  51                                    struct cfg80211_registered_device **rdev,
  52                                    struct net_device **dev)
  53 {
  54         int ifindex;
  55
  56         if (!attrs[NL80211_ATTR_IFINDEX])
  57                 return -EINVAL;
  58
  59         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  60         *dev = dev_get_by_index(netns, ifindex);
  61         if (!*dev)
  62                 return -ENODEV;
  63
  64         *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  65         if (IS_ERR(*rdev)) {
  66                 dev_put(*dev);
  67                 return PTR_ERR(*rdev);
  68         }
  69
  70         return 0;
  71 }
  72
  73 /* policy for the attributes */
  74 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  75         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  77                                       .len = 20-1 },
  78         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  79         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  81         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  82         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  83         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  84         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  85         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  86
  87         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  88         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  89         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  90
  91         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
  92         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
  93
  94         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  95         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  96                                     .len = WLAN_MAX_KEY_LEN },
  97         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  98         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  99         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 100         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 101         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 102
 103         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 104         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 105         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 106                                        .len = IEEE80211_MAX_DATA_LEN },
 107         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 108                                        .len = IEEE80211_MAX_DATA_LEN },
 109         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 110         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 111         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 112         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 113                                                .len = NL80211_MAX_SUPP_RATES },
 114         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 115         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 116         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 117         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 118                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 119         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 120
 121         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 122         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 123
 124         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 125         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 126         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 127         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 128                                            .len = NL80211_MAX_SUPP_RATES },
 129         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 130
 131         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 132         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 133
 134         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 135
 136         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 137         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 138                               .len = IEEE80211_MAX_DATA_LEN },
 139         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 140         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 141
 142         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 143                                 .len = IEEE80211_MAX_SSID_LEN },
 144         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 145         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 146         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 147         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 149         [NL80211_ATTR_STA_FLAGS2] = {
 150                 .len = sizeof(struct nl80211_sta_flag_update),
 151         },
 152         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 153         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 154         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 155         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 156         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 157         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 158         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 159         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 160         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 161                                  .len = WLAN_PMKID_LEN },
 162         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 163         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 164         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 165         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 166                                  .len = IEEE80211_MAX_DATA_LEN },
 167         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 168         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 170         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 171         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 172         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 174         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 175         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 176         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 178         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 179         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 180         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 181         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 182         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 183         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 184         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 185         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 186         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 187                                          .len = IEEE80211_MAX_DATA_LEN },
 188         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 189                                          .len = IEEE80211_MAX_DATA_LEN },
 190         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 191         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 192         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 193         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 194         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 195         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 196         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 197         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 198         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 199         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 200                                       .len = IEEE80211_MAX_DATA_LEN },
 201         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 202         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 203         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 204                 .len = NL80211_HT_CAPABILITY_LEN
 205         },
 206         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 207         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 208         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 209 };
 210
 211 /* policy for the key attributes */
 212 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 213         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 214         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 215         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 216         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 217         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 218         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 219         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 220         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 221 };
 222
 223 /* policy for the key default flags */
 224 static const struct nla_policy
 225 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 226         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 227         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 228 };
 229
 230 /* policy for WoWLAN attributes */
 231 static const struct nla_policy
 232 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 233         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 234         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 235         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 236         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 237         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 238         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 239         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 240         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 241 };
 242
 243 /* policy for GTK rekey offload attributes */
 244 static const struct nla_policy
 245 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 246         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 247         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 248         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 249 };
 250
 251 static const struct nla_policy
 252 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 253         [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
 254                                                  .len = IEEE80211_MAX_SSID_LEN },
 255 };
 256
 257 /* ifidx get helper */
 258 static int nl80211_get_ifidx(struct netlink_callback *cb)
 259 {
 260         int res;
 261
 262         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 263                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 264                           nl80211_policy);
 265         if (res)
 266                 return res;
 267
 268         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 269                 return -EINVAL;
 270
 271         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 272         if (!res)
 273                 return -EINVAL;
 274         return res;
 275 }
 276
 277 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 278                                        struct netlink_callback *cb,
 279                                        struct cfg80211_registered_device **rdev,
 280                                        struct net_device **dev)
 281 {
 282         int ifidx = cb->args[0];
 283         int err;
 284
 285         if (!ifidx)
 286                 ifidx = nl80211_get_ifidx(cb);
 287         if (ifidx < 0)
 288                 return ifidx;
 289
 290         cb->args[0] = ifidx;
 291
 292         rtnl_lock();
 293
 294         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 295         if (!*dev) {
 296                 err = -ENODEV;
 297                 goto out_rtnl;
 298         }
 299
 300         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 301         if (IS_ERR(*rdev)) {
 302                 err = PTR_ERR(*rdev);
 303                 goto out_rtnl;
 304         }
 305
 306         return 0;
 307  out_rtnl:
 308         rtnl_unlock();
 309         return err;
 310 }
 311
 312 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 313 {
 314         cfg80211_unlock_rdev(rdev);
 315         rtnl_unlock();
 316 }
 317
 318 /* IE validation */
 319 static bool is_valid_ie_attr(const struct nlattr *attr)
 320 {
 321         const u8 *pos;
 322         int len;
 323
 324         if (!attr)
 325                 return true;
 326
 327         pos = nla_data(attr);
 328         len = nla_len(attr);
 329
 330         while (len) {
 331                 u8 elemlen;
 332
 333                 if (len < 2)
 334                         return false;
 335                 len -= 2;
 336
 337                 elemlen = pos[1];
 338                 if (elemlen > len)
 339                         return false;
 340
 341                 len -= elemlen;
 342                 pos += 2 + elemlen;
 343         }
 344
 345         return true;
 346 }
 347
 348 /* message building helper */
 349 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 350                                    int flags, u8 cmd)
 351 {
 352         /* since there is no private header just add the generic one */
 353         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 354 }
 355
 356 static int nl80211_msg_put_channel(struct sk_buff *msg,
 357                                    struct ieee80211_channel *chan)
 358 {
 359         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 360                     chan->center_freq);
 361
 362         if (chan->flags & IEEE80211_CHAN_DISABLED)
 363                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 364         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 365                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 366         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 367                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 368         if (chan->flags & IEEE80211_CHAN_RADAR)
 369                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 370
 371         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 372                     DBM_TO_MBM(chan->max_power));
 373
 374         return 0;
 375
 376  nla_put_failure:
 377         return -ENOBUFS;
 378 }
 379
 380 /* netlink command implementations */
 381
 382 struct key_parse {
 383         struct key_params p;
 384         int idx;
 385         int type;
 386         bool def, defmgmt;
 387         bool def_uni, def_multi;
 388 };
 389
 390 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 391 {
 392         struct nlattr *tb[NL80211_KEY_MAX + 1];
 393         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 394                                    nl80211_key_policy);
 395         if (err)
 396                 return err;
 397
 398         k->def = !!tb[NL80211_KEY_DEFAULT];
 399         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 400
 401         if (k->def) {
 402                 k->def_uni = true;
 403                 k->def_multi = true;
 404         }
 405         if (k->defmgmt)
 406                 k->def_multi = true;
 407
 408         if (tb[NL80211_KEY_IDX])
 409                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 410
 411         if (tb[NL80211_KEY_DATA]) {
 412                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 413                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 414         }
 415
 416         if (tb[NL80211_KEY_SEQ]) {
 417                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 418                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 419         }
 420
 421         if (tb[NL80211_KEY_CIPHER])
 422                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 423
 424         if (tb[NL80211_KEY_TYPE]) {
 425                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 426                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 427                         return -EINVAL;
 428         }
 429
 430         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 431                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 432                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 433                                        tb[NL80211_KEY_DEFAULT_TYPES],
 434                                        nl80211_key_default_policy);
 435                 if (err)
 436                         return err;
 437
 438                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 439                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 446 {
 447         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 448                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 449                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 450         }
 451
 452         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 453                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 454                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 455         }
 456
 457         if (info->attrs[NL80211_ATTR_KEY_IDX])
 458                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 459
 460         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 461                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 462
 463         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 464         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 465
 466         if (k->def) {
 467                 k->def_uni = true;
 468                 k->def_multi = true;
 469         }
 470         if (k->defmgmt)
 471                 k->def_multi = true;
 472
 473         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 474                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 475                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 476                         return -EINVAL;
 477         }
 478
 479         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 480                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 481                 int err = nla_parse_nested(
 482                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 483                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 484                                 nl80211_key_default_policy);
 485                 if (err)
 486                         return err;
 487
 488                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 489                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 490         }
 491
 492         return 0;
 493 }
 494
 495 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 496 {
 497         int err;
 498
 499         memset(k, 0, sizeof(*k));
 500         k->idx = -1;
 501         k->type = -1;
 502
 503         if (info->attrs[NL80211_ATTR_KEY])
 504                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 505         else
 506                 err = nl80211_parse_key_old(info, k);
 507
 508         if (err)
 509                 return err;
 510
 511         if (k->def && k->defmgmt)
 512                 return -EINVAL;
 513
 514         if (k->defmgmt) {
 515                 if (k->def_uni || !k->def_multi)
 516                         return -EINVAL;
 517         }
 518
 519         if (k->idx != -1) {
 520                 if (k->defmgmt) {
 521                         if (k->idx < 4 || k->idx > 5)
 522                                 return -EINVAL;
 523                 } else if (k->def) {
 524                         if (k->idx < 0 || k->idx > 3)
 525                                 return -EINVAL;
 526                 } else {
 527                         if (k->idx < 0 || k->idx > 5)
 528                                 return -EINVAL;
 529                 }
 530         }
 531
 532         return 0;
 533 }
 534
 535 static struct cfg80211_cached_keys *
 536 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 537                        struct nlattr *keys)
 538 {
 539         struct key_parse parse;
 540         struct nlattr *key;
 541         struct cfg80211_cached_keys *result;
 542         int rem, err, def = 0;
 543
 544         result = kzalloc(sizeof(*result), GFP_KERNEL);
 545         if (!result)
 546                 return ERR_PTR(-ENOMEM);
 547
 548         result->def = -1;
 549         result->defmgmt = -1;
 550
 551         nla_for_each_nested(key, keys, rem) {
 552                 memset(&parse, 0, sizeof(parse));
 553                 parse.idx = -1;
 554
 555                 err = nl80211_parse_key_new(key, &parse);
 556                 if (err)
 557                         goto error;
 558                 err = -EINVAL;
 559                 if (!parse.p.key)
 560                         goto error;
 561                 if (parse.idx < 0 || parse.idx > 4)
 562                         goto error;
 563                 if (parse.def) {
 564                         if (def)
 565                                 goto error;
 566                         def = 1;
 567                         result->def = parse.idx;
 568                         if (!parse.def_uni || !parse.def_multi)
 569                                 goto error;
 570                 } else if (parse.defmgmt)
 571                         goto error;
 572                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 573                                                      parse.idx, false, NULL);
 574                 if (err)
 575                         goto error;
 576                 result->params[parse.idx].cipher = parse.p.cipher;
 577                 result->params[parse.idx].key_len = parse.p.key_len;
 578                 result->params[parse.idx].key = result->data[parse.idx];
 579                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 580         }
 581
 582         return result;
 583  error:
 584         kfree(result);
 585         return ERR_PTR(err);
 586 }
 587
 588 static int nl80211_key_allowed(struct wireless_dev *wdev)
 589 {
 590         ASSERT_WDEV_LOCK(wdev);
 591
 592         switch (wdev->iftype) {
 593         case NL80211_IFTYPE_AP:
 594         case NL80211_IFTYPE_AP_VLAN:
 595         case NL80211_IFTYPE_P2P_GO:
 596         case NL80211_IFTYPE_MESH_POINT:
 597                 break;
 598         case NL80211_IFTYPE_ADHOC:
 599                 if (!wdev->current_bss)
 600                         return -ENOLINK;
 601                 break;
 602         case NL80211_IFTYPE_STATION:
 603         case NL80211_IFTYPE_P2P_CLIENT:
 604                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 605                         return -ENOLINK;
 606                 break;
 607         default:
 608                 return -EINVAL;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 615 {
 616         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 617         int i;
 618
 619         if (!nl_modes)
 620                 goto nla_put_failure;
 621
 622         i = 0;
 623         while (ifmodes) {
 624                 if (ifmodes & 1)
 625                         NLA_PUT_FLAG(msg, i);
 626                 ifmodes >>= 1;
 627                 i++;
 628         }
 629
 630         nla_nest_end(msg, nl_modes);
 631         return 0;
 632
 633 nla_put_failure:
 634         return -ENOBUFS;
 635 }
 636
 637 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 638                                           struct sk_buff *msg)
 639 {
 640         struct nlattr *nl_combis;
 641         int i, j;
 642
 643         nl_combis = nla_nest_start(msg,
 644                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 645         if (!nl_combis)
 646                 goto nla_put_failure;
 647
 648         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 649                 const struct ieee80211_iface_combination *c;
 650                 struct nlattr *nl_combi, *nl_limits;
 651
 652                 c = &wiphy->iface_combinations[i];
 653
 654                 nl_combi = nla_nest_start(msg, i + 1);
 655                 if (!nl_combi)
 656                         goto nla_put_failure;
 657
 658                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 659                 if (!nl_limits)
 660                         goto nla_put_failure;
 661
 662                 for (j = 0; j < c->n_limits; j++) {
 663                         struct nlattr *nl_limit;
 664
 665                         nl_limit = nla_nest_start(msg, j + 1);
 666                         if (!nl_limit)
 667                                 goto nla_put_failure;
 668                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 669                                     c->limits[j].max);
 670                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 671                                                 c->limits[j].types))
 672                                 goto nla_put_failure;
 673                         nla_nest_end(msg, nl_limit);
 674                 }
 675
 676                 nla_nest_end(msg, nl_limits);
 677
 678                 if (c->beacon_int_infra_match)
 679                         NLA_PUT_FLAG(msg,
 680                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 681                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 682                             c->num_different_channels);
 683                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 684                             c->max_interfaces);
 685
 686                 nla_nest_end(msg, nl_combi);
 687         }
 688
 689         nla_nest_end(msg, nl_combis);
 690
 691         return 0;
 692 nla_put_failure:
 693         return -ENOBUFS;
 694 }
 695
 696 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 697                               struct cfg80211_registered_device *dev)
 698 {
 699         void *hdr;
 700         struct nlattr *nl_bands, *nl_band;
 701         struct nlattr *nl_freqs, *nl_freq;
 702         struct nlattr *nl_rates, *nl_rate;
 703         struct nlattr *nl_cmds;
 704         enum ieee80211_band band;
 705         struct ieee80211_channel *chan;
 706         struct ieee80211_rate *rate;
 707         int i;
 708         const struct ieee80211_txrx_stypes *mgmt_stypes =
 709                                 dev->wiphy.mgmt_stypes;
 710
 711         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 712         if (!hdr)
 713                 return -1;
 714
 715         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 716         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 717
 718         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 719                     cfg80211_rdev_list_generation);
 720
 721         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 722                    dev->wiphy.retry_short);
 723         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 724                    dev->wiphy.retry_long);
 725         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 726                     dev->wiphy.frag_threshold);
 727         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 728                     dev->wiphy.rts_threshold);
 729         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 730                     dev->wiphy.coverage_class);
 731         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 732                    dev->wiphy.max_scan_ssids);
 733         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 734                    dev->wiphy.max_sched_scan_ssids);
 735         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 736                     dev->wiphy.max_scan_ie_len);
 737         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 738                     dev->wiphy.max_sched_scan_ie_len);
 739         NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 740                    dev->wiphy.max_match_sets);
 741
 742         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 743                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 744         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 745                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 746         if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
 747                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
 748         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 749                 NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
 750         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
 751                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
 752         if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
 753                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
 754
 755         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 756                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 757                 dev->wiphy.cipher_suites);
 758
 759         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 760                    dev->wiphy.max_num_pmkids);
 761
 762         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 763                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 764
 765         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 766                     dev->wiphy.available_antennas_tx);
 767         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 768                     dev->wiphy.available_antennas_rx);
 769
 770         if (dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD)
 771                 NLA_PUT_U32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 772                             dev->wiphy.probe_resp_offload);
 773
 774         if ((dev->wiphy.available_antennas_tx ||
 775              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 776                 u32 tx_ant = 0, rx_ant = 0;
 777                 int res;
 778                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 779                 if (!res) {
 780                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 781                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 782                 }
 783         }
 784
 785         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 786                                 dev->wiphy.interface_modes))
 787                 goto nla_put_failure;
 788
 789         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 790         if (!nl_bands)
 791                 goto nla_put_failure;
 792
 793         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 794                 if (!dev->wiphy.bands[band])
 795                         continue;
 796
 797                 nl_band = nla_nest_start(msg, band);
 798                 if (!nl_band)
 799                         goto nla_put_failure;
 800
 801                 /* add HT info */
 802                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 803                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 804                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 805                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 806                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 807                                 dev->wiphy.bands[band]->ht_cap.cap);
 808                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 809                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 810                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 811                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 812                 }
 813
 814                 /* add frequencies */
 815                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 816                 if (!nl_freqs)
 817                         goto nla_put_failure;
 818
 819                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 820                         nl_freq = nla_nest_start(msg, i);
 821                         if (!nl_freq)
 822                                 goto nla_put_failure;
 823
 824                         chan = &dev->wiphy.bands[band]->channels[i];
 825
 826                         if (nl80211_msg_put_channel(msg, chan))
 827                                 goto nla_put_failure;
 828
 829                         nla_nest_end(msg, nl_freq);
 830                 }
 831
 832                 nla_nest_end(msg, nl_freqs);
 833
 834                 /* add bitrates */
 835                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 836                 if (!nl_rates)
 837                         goto nla_put_failure;
 838
 839                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 840                         nl_rate = nla_nest_start(msg, i);
 841                         if (!nl_rate)
 842                                 goto nla_put_failure;
 843
 844                         rate = &dev->wiphy.bands[band]->bitrates[i];
 845                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 846                                     rate->bitrate);
 847                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 848                                 NLA_PUT_FLAG(msg,
 849                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 850
 851                         nla_nest_end(msg, nl_rate);
 852                 }
 853
 854                 nla_nest_end(msg, nl_rates);
 855
 856                 nla_nest_end(msg, nl_band);
 857         }
 858         nla_nest_end(msg, nl_bands);
 859
 860         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 861         if (!nl_cmds)
 862                 goto nla_put_failure;
 863
 864         i = 0;
 865 #define CMD(op, n)                                              \
 866          do {                                                   \
 867                 if (dev->ops->op) {                             \
 868                         i++;                                    \
 869                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 870                 }                                               \
 871         } while (0)
 872
 873         CMD(add_virtual_intf, NEW_INTERFACE);
 874         CMD(change_virtual_intf, SET_INTERFACE);
 875         CMD(add_key, NEW_KEY);
 876         CMD(start_ap, START_AP);
 877         CMD(add_station, NEW_STATION);
 878         CMD(add_mpath, NEW_MPATH);
 879         CMD(update_mesh_config, SET_MESH_CONFIG);
 880         CMD(change_bss, SET_BSS);
 881         CMD(auth, AUTHENTICATE);
 882         CMD(assoc, ASSOCIATE);
 883         CMD(deauth, DEAUTHENTICATE);
 884         CMD(disassoc, DISASSOCIATE);
 885         CMD(join_ibss, JOIN_IBSS);
 886         CMD(join_mesh, JOIN_MESH);
 887         CMD(set_pmksa, SET_PMKSA);
 888         CMD(del_pmksa, DEL_PMKSA);
 889         CMD(flush_pmksa, FLUSH_PMKSA);
 890         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 891                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 892         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 893         CMD(mgmt_tx, FRAME);
 894         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 895         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 896                 i++;
 897                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 898         }
 899         CMD(set_channel, SET_CHANNEL);
 900         CMD(set_wds_peer, SET_WDS_PEER);
 901         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 902                 CMD(tdls_mgmt, TDLS_MGMT);
 903                 CMD(tdls_oper, TDLS_OPER);
 904         }
 905         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 906                 CMD(sched_scan_start, START_SCHED_SCAN);
 907         CMD(probe_client, PROBE_CLIENT);
 908         CMD(set_noack_map, SET_NOACK_MAP);
 909         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
 910                 i++;
 911                 NLA_PUT_U32(msg, i, NL80211_CMD_REGISTER_BEACONS);
 912         }
 913
 914 #ifdef CONFIG_NL80211_TESTMODE
 915         CMD(testmode_cmd, TESTMODE);
 916 #endif
 917
 918 #undef CMD
 919
 920         if (dev->ops->connect || dev->ops->auth) {
 921                 i++;
 922                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 923         }
 924
 925         if (dev->ops->disconnect || dev->ops->deauth) {
 926                 i++;
 927                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 928         }
 929
 930         nla_nest_end(msg, nl_cmds);
 931
 932         if (dev->ops->remain_on_channel &&
 933             dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
 934                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 935                             dev->wiphy.max_remain_on_channel_duration);
 936
 937         if (dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX)
 938                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 939
 940         if (mgmt_stypes) {
 941                 u16 stypes;
 942                 struct nlattr *nl_ftypes, *nl_ifs;
 943                 enum nl80211_iftype ift;
 944
 945                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 946                 if (!nl_ifs)
 947                         goto nla_put_failure;
 948
 949                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 950                         nl_ftypes = nla_nest_start(msg, ift);
 951                         if (!nl_ftypes)
 952                                 goto nla_put_failure;
 953                         i = 0;
 954                         stypes = mgmt_stypes[ift].tx;
 955                         while (stypes) {
 956                                 if (stypes & 1)
 957                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 958                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 959                                 stypes >>= 1;
 960                                 i++;
 961                         }
 962                         nla_nest_end(msg, nl_ftypes);
 963                 }
 964
 965                 nla_nest_end(msg, nl_ifs);
 966
 967                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 968                 if (!nl_ifs)
 969                         goto nla_put_failure;
 970
 971                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 972                         nl_ftypes = nla_nest_start(msg, ift);
 973                         if (!nl_ftypes)
 974                                 goto nla_put_failure;
 975                         i = 0;
 976                         stypes = mgmt_stypes[ift].rx;
 977                         while (stypes) {
 978                                 if (stypes & 1)
 979                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 980                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 981                                 stypes >>= 1;
 982                                 i++;
 983                         }
 984                         nla_nest_end(msg, nl_ftypes);
 985                 }
 986                 nla_nest_end(msg, nl_ifs);
 987         }
 988
 989         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 990                 struct nlattr *nl_wowlan;
 991
 992                 nl_wowlan = nla_nest_start(msg,
 993                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 994                 if (!nl_wowlan)
 995                         goto nla_put_failure;
 996
 997                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 998                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 999                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
1000                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
1001                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
1002                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
1003                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
1004                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
1005                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
1006                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
1007                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
1008                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
1009                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
1010                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
1011                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
1012                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
1013                 if (dev->wiphy.wowlan.n_patterns) {
1014                         struct nl80211_wowlan_pattern_support pat = {
1015                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1016                                 .min_pattern_len =
1017                                         dev->wiphy.wowlan.pattern_min_len,
1018                                 .max_pattern_len =
1019                                         dev->wiphy.wowlan.pattern_max_len,
1020                         };
1021                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1022                                 sizeof(pat), &pat);
1023                 }
1024
1025                 nla_nest_end(msg, nl_wowlan);
1026         }
1027
1028         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1029                                 dev->wiphy.software_iftypes))
1030                 goto nla_put_failure;
1031
1032         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1033                 goto nla_put_failure;
1034
1035         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME)
1036                 NLA_PUT_U32(msg, NL80211_ATTR_DEVICE_AP_SME,
1037                             dev->wiphy.ap_sme_capa);
1038
1039         NLA_PUT_U32(msg, NL80211_ATTR_FEATURE_FLAGS, dev->wiphy.features);
1040
1041         if (dev->wiphy.ht_capa_mod_mask)
1042                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1043                         sizeof(*dev->wiphy.ht_capa_mod_mask),
1044                         dev->wiphy.ht_capa_mod_mask);
1045
1046         return genlmsg_end(msg, hdr);
1047
1048  nla_put_failure:
1049         genlmsg_cancel(msg, hdr);
1050         return -EMSGSIZE;
1051 }
1052
1053 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1054 {
1055         int idx = 0;
1056         int start = cb->args[0];
1057         struct cfg80211_registered_device *dev;
1058
1059         mutex_lock(&cfg80211_mutex);
1060         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1061                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1062                         continue;
1063                 if (++idx <= start)
1064                         continue;
1065                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1066                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1067                                        dev) < 0) {
1068                         idx--;
1069                         break;
1070                 }
1071         }
1072         mutex_unlock(&cfg80211_mutex);
1073
1074         cb->args[0] = idx;
1075
1076         return skb->len;
1077 }
1078
1079 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1080 {
1081         struct sk_buff *msg;
1082         struct cfg80211_registered_device *dev = info->user_ptr[0];
1083
1084         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1085         if (!msg)
1086                 return -ENOMEM;
1087
1088         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1089                 nlmsg_free(msg);
1090                 return -ENOBUFS;
1091         }
1092
1093         return genlmsg_reply(msg, info);
1094 }
1095
1096 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1097         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1098         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1099         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1100         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1101         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1102 };
1103
1104 static int parse_txq_params(struct nlattr *tb[],
1105                             struct ieee80211_txq_params *txq_params)
1106 {
1107         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1108             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1109             !tb[NL80211_TXQ_ATTR_AIFS])
1110                 return -EINVAL;
1111
1112         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1113         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1114         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1115         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1116         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1117
1118         return 0;
1119 }
1120
1121 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1122 {
1123         /*
1124          * You can only set the channel explicitly for AP, mesh
1125          * and WDS type interfaces; all others have their channel
1126          * managed via their respective "establish a connection"
1127          * command (connect, join, ...)
1128          *
1129          * Monitors are special as they are normally slaved to
1130          * whatever else is going on, so they behave as though
1131          * you tried setting the wiphy channel itself.
1132          */
1133         return !wdev ||
1134                 wdev->iftype == NL80211_IFTYPE_AP ||
1135                 wdev->iftype == NL80211_IFTYPE_WDS ||
1136                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1137                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1138                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1139 }
1140
1141 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1142                                  struct wireless_dev *wdev,
1143                                  struct genl_info *info)
1144 {
1145         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1146         u32 freq;
1147         int result;
1148
1149         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1150                 return -EINVAL;
1151
1152         if (!nl80211_can_set_dev_channel(wdev))
1153                 return -EOPNOTSUPP;
1154
1155         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1156                 channel_type = nla_get_u32(info->attrs[
1157                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1158                 if (channel_type != NL80211_CHAN_NO_HT &&
1159                     channel_type != NL80211_CHAN_HT20 &&
1160                     channel_type != NL80211_CHAN_HT40PLUS &&
1161                     channel_type != NL80211_CHAN_HT40MINUS)
1162                         return -EINVAL;
1163         }
1164
1165         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1166
1167         mutex_lock(&rdev->devlist_mtx);
1168         if (wdev) {
1169                 wdev_lock(wdev);
1170                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1171                 wdev_unlock(wdev);
1172         } else {
1173                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1174         }
1175         mutex_unlock(&rdev->devlist_mtx);
1176
1177         return result;
1178 }
1179
1180 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1181 {
1182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1183         struct net_device *netdev = info->user_ptr[1];
1184
1185         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1186 }
1187
1188 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1189 {
1190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1191         struct net_device *dev = info->user_ptr[1];
1192         struct wireless_dev *wdev = dev->ieee80211_ptr;
1193         const u8 *bssid;
1194
1195         if (!info->attrs[NL80211_ATTR_MAC])
1196                 return -EINVAL;
1197
1198         if (netif_running(dev))
1199                 return -EBUSY;
1200
1201         if (!rdev->ops->set_wds_peer)
1202                 return -EOPNOTSUPP;
1203
1204         if (wdev->iftype != NL80211_IFTYPE_WDS)
1205                 return -EOPNOTSUPP;
1206
1207         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1208         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1209 }
1210
1211
1212 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1213 {
1214         struct cfg80211_registered_device *rdev;
1215         struct net_device *netdev = NULL;
1216         struct wireless_dev *wdev;
1217         int result = 0, rem_txq_params = 0;
1218         struct nlattr *nl_txq_params;
1219         u32 changed;
1220         u8 retry_short = 0, retry_long = 0;
1221         u32 frag_threshold = 0, rts_threshold = 0;
1222         u8 coverage_class = 0;
1223
1224         /*
1225          * Try to find the wiphy and netdev. Normally this
1226          * function shouldn't need the netdev, but this is
1227          * done for backward compatibility -- previously
1228          * setting the channel was done per wiphy, but now
1229          * it is per netdev. Previous userland like hostapd
1230          * also passed a netdev to set_wiphy, so that it is
1231          * possible to let that go to the right netdev!
1232          */
1233         mutex_lock(&cfg80211_mutex);
1234
1235         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1236                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1237
1238                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1239                 if (netdev && netdev->ieee80211_ptr) {
1240                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1241                         mutex_lock(&rdev->mtx);
1242                 } else
1243                         netdev = NULL;
1244         }
1245
1246         if (!netdev) {
1247                 rdev = __cfg80211_rdev_from_info(info);
1248                 if (IS_ERR(rdev)) {
1249                         mutex_unlock(&cfg80211_mutex);
1250                         return PTR_ERR(rdev);
1251                 }
1252                 wdev = NULL;
1253                 netdev = NULL;
1254                 result = 0;
1255
1256                 mutex_lock(&rdev->mtx);
1257         } else if (netif_running(netdev) &&
1258                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1259                 wdev = netdev->ieee80211_ptr;
1260         else
1261                 wdev = NULL;
1262
1263         /*
1264          * end workaround code, by now the rdev is available
1265          * and locked, and wdev may or may not be NULL.
1266          */
1267
1268         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1269                 result = cfg80211_dev_rename(
1270                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1271
1272         mutex_unlock(&cfg80211_mutex);
1273
1274         if (result)
1275                 goto bad_res;
1276
1277         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1278                 struct ieee80211_txq_params txq_params;
1279                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1280
1281                 if (!rdev->ops->set_txq_params) {
1282                         result = -EOPNOTSUPP;
1283                         goto bad_res;
1284                 }
1285
1286                 if (!netdev) {
1287                         result = -EINVAL;
1288                         goto bad_res;
1289                 }
1290
1291                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1292                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1293                         result = -EINVAL;
1294                         goto bad_res;
1295                 }
1296
1297                 if (!netif_running(netdev)) {
1298                         result = -ENETDOWN;
1299                         goto bad_res;
1300                 }
1301
1302                 nla_for_each_nested(nl_txq_params,
1303                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1304                                     rem_txq_params) {
1305                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1306                                   nla_data(nl_txq_params),
1307                                   nla_len(nl_txq_params),
1308                                   txq_params_policy);
1309                         result = parse_txq_params(tb, &txq_params);
1310                         if (result)
1311                                 goto bad_res;
1312
1313                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1314                                                            netdev,
1315                                                            &txq_params);
1316                         if (result)
1317                                 goto bad_res;
1318                 }
1319         }
1320
1321         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1322                 result = __nl80211_set_channel(rdev, wdev, info);
1323                 if (result)
1324                         goto bad_res;
1325         }
1326
1327         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1328                 enum nl80211_tx_power_setting type;
1329                 int idx, mbm = 0;
1330
1331                 if (!rdev->ops->set_tx_power) {
1332                         result = -EOPNOTSUPP;
1333                         goto bad_res;
1334                 }
1335
1336                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1337                 type = nla_get_u32(info->attrs[idx]);
1338
1339                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1340                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1341                         result = -EINVAL;
1342                         goto bad_res;
1343                 }
1344
1345                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1346                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1347                         mbm = nla_get_u32(info->attrs[idx]);
1348                 }
1349
1350                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1351                 if (result)
1352                         goto bad_res;
1353         }
1354
1355         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1356             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1357                 u32 tx_ant, rx_ant;
1358                 if ((!rdev->wiphy.available_antennas_tx &&
1359                      !rdev->wiphy.available_antennas_rx) ||
1360                     !rdev->ops->set_antenna) {
1361                         result = -EOPNOTSUPP;
1362                         goto bad_res;
1363                 }
1364
1365                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1366                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1367
1368                 /* reject antenna configurations which don't match the
1369                  * available antenna masks, except for the "all" mask */
1370                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1371                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1372                         result = -EINVAL;
1373                         goto bad_res;
1374                 }
1375
1376                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1377                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1378
1379                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1380                 if (result)
1381                         goto bad_res;
1382         }
1383
1384         changed = 0;
1385
1386         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1387                 retry_short = nla_get_u8(
1388                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1389                 if (retry_short == 0) {
1390                         result = -EINVAL;
1391                         goto bad_res;
1392                 }
1393                 changed |= WIPHY_PARAM_RETRY_SHORT;
1394         }
1395
1396         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1397                 retry_long = nla_get_u8(
1398                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1399                 if (retry_long == 0) {
1400                         result = -EINVAL;
1401                         goto bad_res;
1402                 }
1403                 changed |= WIPHY_PARAM_RETRY_LONG;
1404         }
1405
1406         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1407                 frag_threshold = nla_get_u32(
1408                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1409                 if (frag_threshold < 256) {
1410                         result = -EINVAL;
1411                         goto bad_res;
1412                 }
1413                 if (frag_threshold != (u32) -1) {
1414                         /*
1415                          * Fragments (apart from the last one) are required to
1416                          * have even length. Make the fragmentation code
1417                          * simpler by stripping LSB should someone try to use
1418                          * odd threshold value.
1419                          */
1420                         frag_threshold &= ~0x1;
1421                 }
1422                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1423         }
1424
1425         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1426                 rts_threshold = nla_get_u32(
1427                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1428                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1429         }
1430
1431         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1432                 coverage_class = nla_get_u8(
1433                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1434                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1435         }
1436
1437         if (changed) {
1438                 u8 old_retry_short, old_retry_long;
1439                 u32 old_frag_threshold, old_rts_threshold;
1440                 u8 old_coverage_class;
1441
1442                 if (!rdev->ops->set_wiphy_params) {
1443                         result = -EOPNOTSUPP;
1444                         goto bad_res;
1445                 }
1446
1447                 old_retry_short = rdev->wiphy.retry_short;
1448                 old_retry_long = rdev->wiphy.retry_long;
1449                 old_frag_threshold = rdev->wiphy.frag_threshold;
1450                 old_rts_threshold = rdev->wiphy.rts_threshold;
1451                 old_coverage_class = rdev->wiphy.coverage_class;
1452
1453                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1454                         rdev->wiphy.retry_short = retry_short;
1455                 if (changed & WIPHY_PARAM_RETRY_LONG)
1456                         rdev->wiphy.retry_long = retry_long;
1457                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1458                         rdev->wiphy.frag_threshold = frag_threshold;
1459                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1460                         rdev->wiphy.rts_threshold = rts_threshold;
1461                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1462                         rdev->wiphy.coverage_class = coverage_class;
1463
1464                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1465                 if (result) {
1466                         rdev->wiphy.retry_short = old_retry_short;
1467                         rdev->wiphy.retry_long = old_retry_long;
1468                         rdev->wiphy.frag_threshold = old_frag_threshold;
1469                         rdev->wiphy.rts_threshold = old_rts_threshold;
1470                         rdev->wiphy.coverage_class = old_coverage_class;
1471                 }
1472         }
1473
1474  bad_res:
1475         mutex_unlock(&rdev->mtx);
1476         if (netdev)
1477                 dev_put(netdev);
1478         return result;
1479 }
1480
1481
1482 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1483                               struct cfg80211_registered_device *rdev,
1484                               struct net_device *dev)
1485 {
1486         void *hdr;
1487
1488         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1489         if (!hdr)
1490                 return -1;
1491
1492         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1493         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1494         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1495         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1496
1497         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1498                     rdev->devlist_generation ^
1499                         (cfg80211_rdev_list_generation << 2));
1500
1501         return genlmsg_end(msg, hdr);
1502
1503  nla_put_failure:
1504         genlmsg_cancel(msg, hdr);
1505         return -EMSGSIZE;
1506 }
1507
1508 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1509 {
1510         int wp_idx = 0;
1511         int if_idx = 0;
1512         int wp_start = cb->args[0];
1513         int if_start = cb->args[1];
1514         struct cfg80211_registered_device *rdev;
1515         struct wireless_dev *wdev;
1516
1517         mutex_lock(&cfg80211_mutex);
1518         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1519                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1520                         continue;
1521                 if (wp_idx < wp_start) {
1522                         wp_idx++;
1523                         continue;
1524                 }
1525                 if_idx = 0;
1526
1527                 mutex_lock(&rdev->devlist_mtx);
1528                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1529                         if (if_idx < if_start) {
1530                                 if_idx++;
1531                                 continue;
1532                         }
1533                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1534                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1535                                                rdev, wdev->netdev) < 0) {
1536                                 mutex_unlock(&rdev->devlist_mtx);
1537                                 goto out;
1538                         }
1539                         if_idx++;
1540                 }
1541                 mutex_unlock(&rdev->devlist_mtx);
1542
1543                 wp_idx++;
1544         }
1545  out:
1546         mutex_unlock(&cfg80211_mutex);
1547
1548         cb->args[0] = wp_idx;
1549         cb->args[1] = if_idx;
1550
1551         return skb->len;
1552 }
1553
1554 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1555 {
1556         struct sk_buff *msg;
1557         struct cfg80211_registered_device *dev = info->user_ptr[0];
1558         struct net_device *netdev = info->user_ptr[1];
1559
1560         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1561         if (!msg)
1562                 return -ENOMEM;
1563
1564         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1565                                dev, netdev) < 0) {
1566                 nlmsg_free(msg);
1567                 return -ENOBUFS;
1568         }
1569
1570         return genlmsg_reply(msg, info);
1571 }
1572
1573 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1574         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1575         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1576         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1577         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1578         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1579 };
1580
1581 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1582 {
1583         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1584         int flag;
1585
1586         *mntrflags = 0;
1587
1588         if (!nla)
1589                 return -EINVAL;
1590
1591         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1592                              nla, mntr_flags_policy))
1593                 return -EINVAL;
1594
1595         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1596                 if (flags[flag])
1597                         *mntrflags |= (1<<flag);
1598
1599         return 0;
1600 }
1601
1602 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1603                                struct net_device *netdev, u8 use_4addr,
1604                                enum nl80211_iftype iftype)
1605 {
1606         if (!use_4addr) {
1607                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1608                         return -EBUSY;
1609                 return 0;
1610         }
1611
1612         switch (iftype) {
1613         case NL80211_IFTYPE_AP_VLAN:
1614                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1615                         return 0;
1616                 break;
1617         case NL80211_IFTYPE_STATION:
1618                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1619                         return 0;
1620                 break;
1621         default:
1622                 break;
1623         }
1624
1625         return -EOPNOTSUPP;
1626 }
1627
1628 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1629 {
1630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1631         struct vif_params params;
1632         int err;
1633         enum nl80211_iftype otype, ntype;
1634         struct net_device *dev = info->user_ptr[1];
1635         u32 _flags, *flags = NULL;
1636         bool change = false;
1637
1638         memset(&params, 0, sizeof(params));
1639
1640         otype = ntype = dev->ieee80211_ptr->iftype;
1641
1642         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1643                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1644                 if (otype != ntype)
1645                         change = true;
1646                 if (ntype > NL80211_IFTYPE_MAX)
1647                         return -EINVAL;
1648         }
1649
1650         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1651                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1652
1653                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1654                         return -EINVAL;
1655                 if (netif_running(dev))
1656                         return -EBUSY;
1657
1658                 wdev_lock(wdev);
1659                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1660                              IEEE80211_MAX_MESH_ID_LEN);
1661                 wdev->mesh_id_up_len =
1662                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1663                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1664                        wdev->mesh_id_up_len);
1665                 wdev_unlock(wdev);
1666         }
1667
1668         if (info->attrs[NL80211_ATTR_4ADDR]) {
1669                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1670                 change = true;
1671                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1672                 if (err)
1673                         return err;
1674         } else {
1675                 params.use_4addr = -1;
1676         }
1677
1678         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1679                 if (ntype != NL80211_IFTYPE_MONITOR)
1680                         return -EINVAL;
1681                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1682                                           &_flags);
1683                 if (err)
1684                         return err;
1685
1686                 flags = &_flags;
1687                 change = true;
1688         }
1689
1690         if (change)
1691                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1692         else
1693                 err = 0;
1694
1695         if (!err && params.use_4addr != -1)
1696                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1697
1698         return err;
1699 }
1700
1701 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1702 {
1703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1704         struct vif_params params;
1705         struct net_device *dev;
1706         int err;
1707         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1708         u32 flags;
1709
1710         memset(&params, 0, sizeof(params));
1711
1712         if (!info->attrs[NL80211_ATTR_IFNAME])
1713                 return -EINVAL;
1714
1715         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1716                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1717                 if (type > NL80211_IFTYPE_MAX)
1718                         return -EINVAL;
1719         }
1720
1721         if (!rdev->ops->add_virtual_intf ||
1722             !(rdev->wiphy.interface_modes & (1 << type)))
1723                 return -EOPNOTSUPP;
1724
1725         if (info->attrs[NL80211_ATTR_4ADDR]) {
1726                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1727                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1728                 if (err)
1729                         return err;
1730         }
1731
1732         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1733                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1734                                   &flags);
1735         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1736                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1737                 type, err ? NULL : &flags, &params);
1738         if (IS_ERR(dev))
1739                 return PTR_ERR(dev);
1740
1741         if (type == NL80211_IFTYPE_MESH_POINT &&
1742             info->attrs[NL80211_ATTR_MESH_ID]) {
1743                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1744
1745                 wdev_lock(wdev);
1746                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1747                              IEEE80211_MAX_MESH_ID_LEN);
1748                 wdev->mesh_id_up_len =
1749                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1750                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1751                        wdev->mesh_id_up_len);
1752                 wdev_unlock(wdev);
1753         }
1754
1755         return 0;
1756 }
1757
1758 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1759 {
1760         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1761         struct net_device *dev = info->user_ptr[1];
1762
1763         if (!rdev->ops->del_virtual_intf)
1764                 return -EOPNOTSUPP;
1765
1766         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1767 }
1768
1769 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1770 {
1771         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1772         struct net_device *dev = info->user_ptr[1];
1773         u16 noack_map;
1774
1775         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1776                 return -EINVAL;
1777
1778         if (!rdev->ops->set_noack_map)
1779                 return -EOPNOTSUPP;
1780
1781         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1782
1783         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1784 }
1785
1786 struct get_key_cookie {
1787         struct sk_buff *msg;
1788         int error;
1789         int idx;
1790 };
1791
1792 static void get_key_callback(void *c, struct key_params *params)
1793 {
1794         struct nlattr *key;
1795         struct get_key_cookie *cookie = c;
1796
1797         if (params->key)
1798                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1799                         params->key_len, params->key);
1800
1801         if (params->seq)
1802                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1803                         params->seq_len, params->seq);
1804
1805         if (params->cipher)
1806                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1807                             params->cipher);
1808
1809         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1810         if (!key)
1811                 goto nla_put_failure;
1812
1813         if (params->key)
1814                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1815                         params->key_len, params->key);
1816
1817         if (params->seq)
1818                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1819                         params->seq_len, params->seq);
1820
1821         if (params->cipher)
1822                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1823                             params->cipher);
1824
1825         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1826
1827         nla_nest_end(cookie->msg, key);
1828
1829         return;
1830  nla_put_failure:
1831         cookie->error = 1;
1832 }
1833
1834 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1835 {
1836         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1837         int err;
1838         struct net_device *dev = info->user_ptr[1];
1839         u8 key_idx = 0;
1840         const u8 *mac_addr = NULL;
1841         bool pairwise;
1842         struct get_key_cookie cookie = {
1843                 .error = 0,
1844         };
1845         void *hdr;
1846         struct sk_buff *msg;
1847
1848         if (info->attrs[NL80211_ATTR_KEY_IDX])
1849                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1850
1851         if (key_idx > 5)
1852                 return -EINVAL;
1853
1854         if (info->attrs[NL80211_ATTR_MAC])
1855                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1856
1857         pairwise = !!mac_addr;
1858         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1859                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1860                 if (kt >= NUM_NL80211_KEYTYPES)
1861                         return -EINVAL;
1862                 if (kt != NL80211_KEYTYPE_GROUP &&
1863                     kt != NL80211_KEYTYPE_PAIRWISE)
1864                         return -EINVAL;
1865                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1866         }
1867
1868         if (!rdev->ops->get_key)
1869                 return -EOPNOTSUPP;
1870
1871         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1872         if (!msg)
1873                 return -ENOMEM;
1874
1875         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1876                              NL80211_CMD_NEW_KEY);
1877         if (IS_ERR(hdr))
1878                 return PTR_ERR(hdr);
1879
1880         cookie.msg = msg;
1881         cookie.idx = key_idx;
1882
1883         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1884         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1885         if (mac_addr)
1886                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1887
1888         if (pairwise && mac_addr &&
1889             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1890                 return -ENOENT;
1891
1892         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1893                                  mac_addr, &cookie, get_key_callback);
1894
1895         if (err)
1896                 goto free_msg;
1897
1898         if (cookie.error)
1899                 goto nla_put_failure;
1900
1901         genlmsg_end(msg, hdr);
1902         return genlmsg_reply(msg, info);
1903
1904  nla_put_failure:
1905         err = -ENOBUFS;
1906  free_msg:
1907         nlmsg_free(msg);
1908         return err;
1909 }
1910
1911 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1912 {
1913         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1914         struct key_parse key;
1915         int err;
1916         struct net_device *dev = info->user_ptr[1];
1917
1918         err = nl80211_parse_key(info, &key);
1919         if (err)
1920                 return err;
1921
1922         if (key.idx < 0)
1923                 return -EINVAL;
1924
1925         /* only support setting default key */
1926         if (!key.def && !key.defmgmt)
1927                 return -EINVAL;
1928
1929         wdev_lock(dev->ieee80211_ptr);
1930
1931         if (key.def) {
1932                 if (!rdev->ops->set_default_key) {
1933                         err = -EOPNOTSUPP;
1934                         goto out;
1935                 }
1936
1937                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1938                 if (err)
1939                         goto out;
1940
1941                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1942                                                  key.def_uni, key.def_multi);
1943
1944                 if (err)
1945                         goto out;
1946
1947 #ifdef CONFIG_CFG80211_WEXT
1948                 dev->ieee80211_ptr->wext.default_key = key.idx;
1949 #endif
1950         } else {
1951                 if (key.def_uni || !key.def_multi) {
1952                         err = -EINVAL;
1953                         goto out;
1954                 }
1955
1956                 if (!rdev->ops->set_default_mgmt_key) {
1957                         err = -EOPNOTSUPP;
1958                         goto out;
1959                 }
1960
1961                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1962                 if (err)
1963                         goto out;
1964
1965                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1966                                                       dev, key.idx);
1967                 if (err)
1968                         goto out;
1969
1970 #ifdef CONFIG_CFG80211_WEXT
1971                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1972 #endif
1973         }
1974
1975  out:
1976         wdev_unlock(dev->ieee80211_ptr);
1977
1978         return err;
1979 }
1980
1981 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1982 {
1983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1984         int err;
1985         struct net_device *dev = info->user_ptr[1];
1986         struct key_parse key;
1987         const u8 *mac_addr = NULL;
1988
1989         err = nl80211_parse_key(info, &key);
1990         if (err)
1991                 return err;
1992
1993         if (!key.p.key)
1994                 return -EINVAL;
1995
1996         if (info->attrs[NL80211_ATTR_MAC])
1997                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1998
1999         if (key.type == -1) {
2000                 if (mac_addr)
2001                         key.type = NL80211_KEYTYPE_PAIRWISE;
2002                 else
2003                         key.type = NL80211_KEYTYPE_GROUP;
2004         }
2005
2006         /* for now */
2007         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2008             key.type != NL80211_KEYTYPE_GROUP)
2009                 return -EINVAL;
2010
2011         if (!rdev->ops->add_key)
2012                 return -EOPNOTSUPP;
2013
2014         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2015                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2016                                            mac_addr))
2017                 return -EINVAL;
2018
2019         wdev_lock(dev->ieee80211_ptr);
2020         err = nl80211_key_allowed(dev->ieee80211_ptr);
2021         if (!err)
2022                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2023                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2024                                          mac_addr, &key.p);
2025         wdev_unlock(dev->ieee80211_ptr);
2026
2027         return err;
2028 }
2029
2030 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2031 {
2032         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2033         int err;
2034         struct net_device *dev = info->user_ptr[1];
2035         u8 *mac_addr = NULL;
2036         struct key_parse key;
2037
2038         err = nl80211_parse_key(info, &key);
2039         if (err)
2040                 return err;
2041
2042         if (info->attrs[NL80211_ATTR_MAC])
2043                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2044
2045         if (key.type == -1) {
2046                 if (mac_addr)
2047                         key.type = NL80211_KEYTYPE_PAIRWISE;
2048                 else
2049                         key.type = NL80211_KEYTYPE_GROUP;
2050         }
2051
2052         /* for now */
2053         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2054             key.type != NL80211_KEYTYPE_GROUP)
2055                 return -EINVAL;
2056
2057         if (!rdev->ops->del_key)
2058                 return -EOPNOTSUPP;
2059
2060         wdev_lock(dev->ieee80211_ptr);
2061         err = nl80211_key_allowed(dev->ieee80211_ptr);
2062
2063         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2064             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2065                 err = -ENOENT;
2066
2067         if (!err)
2068                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2069                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2070                                          mac_addr);
2071
2072 #ifdef CONFIG_CFG80211_WEXT
2073         if (!err) {
2074                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2075                         dev->ieee80211_ptr->wext.default_key = -1;
2076                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2077                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2078         }
2079 #endif
2080         wdev_unlock(dev->ieee80211_ptr);
2081
2082         return err;
2083 }
2084
2085 static int nl80211_parse_beacon(struct genl_info *info,
2086                                 struct cfg80211_beacon_data *bcn)
2087 {
2088         bool haveinfo = false;
2089
2090         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2091             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2092             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2093             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2094                 return -EINVAL;
2095
2096         memset(bcn, 0, sizeof(*bcn));
2097
2098         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2099                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2100                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2101                 if (!bcn->head_len)
2102                         return -EINVAL;
2103                 haveinfo = true;
2104         }
2105
2106         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2107                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2108                 bcn->tail_len =
2109                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2110                 haveinfo = true;
2111         }
2112
2113         if (!haveinfo)
2114                 return -EINVAL;
2115
2116         if (info->attrs[NL80211_ATTR_IE]) {
2117                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2118                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2119         }
2120
2121         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2122                 bcn->proberesp_ies =
2123                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2124                 bcn->proberesp_ies_len =
2125                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2126         }
2127
2128         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2129                 bcn->assocresp_ies =
2130                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2131                 bcn->assocresp_ies_len =
2132                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2133         }
2134
2135         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2136                 bcn->probe_resp =
2137                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2138                 bcn->probe_resp_len =
2139                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2140         }
2141
2142         return 0;
2143 }
2144
2145 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2146 {
2147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2148         struct net_device *dev = info->user_ptr[1];
2149         struct wireless_dev *wdev = dev->ieee80211_ptr;
2150         struct cfg80211_ap_settings params;
2151         int err;
2152
2153         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2154             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2155                 return -EOPNOTSUPP;
2156
2157         if (!rdev->ops->start_ap)
2158                 return -EOPNOTSUPP;
2159
2160         if (wdev->beacon_interval)
2161                 return -EALREADY;
2162
2163         memset(&params, 0, sizeof(params));
2164
2165         /* these are required for START_AP */
2166         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2167             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2168             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2169                 return -EINVAL;
2170
2171         err = nl80211_parse_beacon(info, &params.beacon);
2172         if (err)
2173                 return err;
2174
2175         params.beacon_interval =
2176                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2177         params.dtim_period =
2178                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2179
2180         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2181         if (err)
2182                 return err;
2183
2184         /*
2185          * In theory, some of these attributes should be required here
2186          * but since they were not used when the command was originally
2187          * added, keep them optional for old user space programs to let
2188          * them continue to work with drivers that do not need the
2189          * additional information -- drivers must check!
2190          */
2191         if (info->attrs[NL80211_ATTR_SSID]) {
2192                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2193                 params.ssid_len =
2194                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2195                 if (params.ssid_len == 0 ||
2196                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2197                         return -EINVAL;
2198         }
2199
2200         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2201                 params.hidden_ssid = nla_get_u32(
2202                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2203                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2204                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2205                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2206                         return -EINVAL;
2207         }
2208
2209         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2210
2211         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2212                 params.auth_type = nla_get_u32(
2213                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2214                 if (!nl80211_valid_auth_type(params.auth_type))
2215                         return -EINVAL;
2216         } else
2217                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2218
2219         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2220                                       NL80211_MAX_NR_CIPHER_SUITES);
2221         if (err)
2222                 return err;
2223
2224         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2225                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2226                         return -EOPNOTSUPP;
2227                 params.inactivity_timeout = nla_get_u16(
2228                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2229         }
2230
2231         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2232         if (!err)
2233                 wdev->beacon_interval = params.beacon_interval;
2234         return err;
2235 }
2236
2237 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2238 {
2239         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2240         struct net_device *dev = info->user_ptr[1];
2241         struct wireless_dev *wdev = dev->ieee80211_ptr;
2242         struct cfg80211_beacon_data params;
2243         int err;
2244
2245         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2246             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2247                 return -EOPNOTSUPP;
2248
2249         if (!rdev->ops->change_beacon)
2250                 return -EOPNOTSUPP;
2251
2252         if (!wdev->beacon_interval)
2253                 return -EINVAL;
2254
2255         err = nl80211_parse_beacon(info, &params);
2256         if (err)
2257                 return err;
2258
2259         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2260 }
2261
2262 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2263 {
2264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2265         struct net_device *dev = info->user_ptr[1];
2266         struct wireless_dev *wdev = dev->ieee80211_ptr;
2267         int err;
2268
2269         if (!rdev->ops->stop_ap)
2270                 return -EOPNOTSUPP;
2271
2272         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2273             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2274                 return -EOPNOTSUPP;
2275
2276         if (!wdev->beacon_interval)
2277                 return -ENOENT;
2278
2279         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2280         if (!err)
2281                 wdev->beacon_interval = 0;
2282         return err;
2283 }
2284
2285 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2286         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2287         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2288         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2289         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2290         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2291         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2292 };
2293
2294 static int parse_station_flags(struct genl_info *info,
2295                                enum nl80211_iftype iftype,
2296                                struct station_parameters *params)
2297 {
2298         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2299         struct nlattr *nla;
2300         int flag;
2301
2302         /*
2303          * Try parsing the new attribute first so userspace
2304          * can specify both for older kernels.
2305          */
2306         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2307         if (nla) {
2308                 struct nl80211_sta_flag_update *sta_flags;
2309
2310                 sta_flags = nla_data(nla);
2311                 params->sta_flags_mask = sta_flags->mask;
2312                 params->sta_flags_set = sta_flags->set;
2313                 if ((params->sta_flags_mask |
2314                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2315                         return -EINVAL;
2316                 return 0;
2317         }
2318
2319         /* if present, parse the old attribute */
2320
2321         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2322         if (!nla)
2323                 return 0;
2324
2325         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2326                              nla, sta_flags_policy))
2327                 return -EINVAL;
2328
2329         /*
2330          * Only allow certain flags for interface types so that
2331          * other attributes are silently ignored. Remember that
2332          * this is backward compatibility code with old userspace
2333          * and shouldn't be hit in other cases anyway.
2334          */
2335         switch (iftype) {
2336         case NL80211_IFTYPE_AP:
2337         case NL80211_IFTYPE_AP_VLAN:
2338         case NL80211_IFTYPE_P2P_GO:
2339                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2340                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2341                                          BIT(NL80211_STA_FLAG_WME) |
2342                                          BIT(NL80211_STA_FLAG_MFP);
2343                 break;
2344         case NL80211_IFTYPE_P2P_CLIENT:
2345         case NL80211_IFTYPE_STATION:
2346                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2347                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2348                 break;
2349         case NL80211_IFTYPE_MESH_POINT:
2350                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2351                                          BIT(NL80211_STA_FLAG_MFP) |
2352                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2353         default:
2354                 return -EINVAL;
2355         }
2356
2357         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2358                 if (flags[flag])
2359                         params->sta_flags_set |= (1<<flag);
2360
2361         return 0;
2362 }
2363
2364 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2365                                  int attr)
2366 {
2367         struct nlattr *rate;
2368         u16 bitrate;
2369
2370         rate = nla_nest_start(msg, attr);
2371         if (!rate)
2372                 goto nla_put_failure;
2373
2374         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2375         bitrate = cfg80211_calculate_bitrate(info);
2376         if (bitrate > 0)
2377                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2378
2379         if (info->flags & RATE_INFO_FLAGS_MCS)
2380                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2381         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2382                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2383         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2384                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2385
2386         nla_nest_end(msg, rate);
2387         return true;
2388
2389 nla_put_failure:
2390         return false;
2391 }
2392
2393 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2394                                 int flags,
2395                                 struct cfg80211_registered_device *rdev,
2396                                 struct net_device *dev,
2397                                 const u8 *mac_addr, struct station_info *sinfo)
2398 {
2399         void *hdr;
2400         struct nlattr *sinfoattr, *bss_param;
2401
2402         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2403         if (!hdr)
2404                 return -1;
2405
2406         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2407         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2408
2409         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2410
2411         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2412         if (!sinfoattr)
2413                 goto nla_put_failure;
2414         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2415                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2416                             sinfo->connected_time);
2417         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2418                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2419                             sinfo->inactive_time);
2420         if (sinfo->filled & STATION_INFO_RX_BYTES)
2421                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2422                             sinfo->rx_bytes);
2423         if (sinfo->filled & STATION_INFO_TX_BYTES)
2424                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2425                             sinfo->tx_bytes);
2426         if (sinfo->filled & STATION_INFO_LLID)
2427                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2428                             sinfo->llid);
2429         if (sinfo->filled & STATION_INFO_PLID)
2430                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2431                             sinfo->plid);
2432         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2433                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2434                             sinfo->plink_state);
2435         switch (rdev->wiphy.signal_type) {
2436         case CFG80211_SIGNAL_TYPE_MBM:
2437                 if (sinfo->filled & STATION_INFO_SIGNAL)
2438                         NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2439                                    sinfo->signal);
2440                 if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2441                         NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2442                                    sinfo->signal_avg);
2443                 break;
2444         default:
2445                 break;
2446         }
2447         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2448                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2449                                           NL80211_STA_INFO_TX_BITRATE))
2450                         goto nla_put_failure;
2451         }
2452         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2453                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2454                                           NL80211_STA_INFO_RX_BITRATE))
2455                         goto nla_put_failure;
2456         }
2457         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2458                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2459                             sinfo->rx_packets);
2460         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2461                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2462                             sinfo->tx_packets);
2463         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2464                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2465                             sinfo->tx_retries);
2466         if (sinfo->filled & STATION_INFO_TX_FAILED)
2467                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2468                             sinfo->tx_failed);
2469         if (sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT)
2470                 NLA_PUT_U32(msg, NL80211_STA_INFO_BEACON_LOSS,
2471                             sinfo->beacon_loss_count);
2472         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2473                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2474                 if (!bss_param)
2475                         goto nla_put_failure;
2476
2477                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2478                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2479                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2480                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2481                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2482                         NLA_PUT_FLAG(msg,
2483                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2484                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2485                            sinfo->bss_param.dtim_period);
2486                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2487                             sinfo->bss_param.beacon_interval);
2488
2489                 nla_nest_end(msg, bss_param);
2490         }
2491         if (sinfo->filled & STATION_INFO_STA_FLAGS)
2492                 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2493                         sizeof(struct nl80211_sta_flag_update),
2494                         &sinfo->sta_flags);
2495         nla_nest_end(msg, sinfoattr);
2496
2497         if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2498                 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2499                         sinfo->assoc_req_ies);
2500
2501         return genlmsg_end(msg, hdr);
2502
2503  nla_put_failure:
2504         genlmsg_cancel(msg, hdr);
2505         return -EMSGSIZE;
2506 }
2507
2508 static int nl80211_dump_station(struct sk_buff *skb,
2509                                 struct netlink_callback *cb)
2510 {
2511         struct station_info sinfo;
2512         struct cfg80211_registered_device *dev;
2513         struct net_device *netdev;
2514         u8 mac_addr[ETH_ALEN];
2515         int sta_idx = cb->args[1];
2516         int err;
2517
2518         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2519         if (err)
2520                 return err;
2521
2522         if (!dev->ops->dump_station) {
2523                 err = -EOPNOTSUPP;
2524                 goto out_err;
2525         }
2526
2527         while (1) {
2528                 memset(&sinfo, 0, sizeof(sinfo));
2529                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2530                                              mac_addr, &sinfo);
2531                 if (err == -ENOENT)
2532                         break;
2533                 if (err)
2534                         goto out_err;
2535
2536                 if (nl80211_send_station(skb,
2537                                 NETLINK_CB(cb->skb).pid,
2538                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2539                                 dev, netdev, mac_addr,
2540                                 &sinfo) < 0)
2541                         goto out;
2542
2543                 sta_idx++;
2544         }
2545
2546
2547  out:
2548         cb->args[1] = sta_idx;
2549         err = skb->len;
2550  out_err:
2551         nl80211_finish_netdev_dump(dev);
2552
2553         return err;
2554 }
2555
2556 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2557 {
2558         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2559         struct net_device *dev = info->user_ptr[1];
2560         struct station_info sinfo;
2561         struct sk_buff *msg;
2562         u8 *mac_addr = NULL;
2563         int err;
2564
2565         memset(&sinfo, 0, sizeof(sinfo));
2566
2567         if (!info->attrs[NL80211_ATTR_MAC])
2568                 return -EINVAL;
2569
2570         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2571
2572         if (!rdev->ops->get_station)
2573                 return -EOPNOTSUPP;
2574
2575         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2576         if (err)
2577                 return err;
2578
2579         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2580         if (!msg)
2581                 return -ENOMEM;
2582
2583         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2584                                  rdev, dev, mac_addr, &sinfo) < 0) {
2585                 nlmsg_free(msg);
2586                 return -ENOBUFS;
2587         }
2588
2589         return genlmsg_reply(msg, info);
2590 }
2591
2592 /*
2593  * Get vlan interface making sure it is running and on the right wiphy.
2594  */
2595 static struct net_device *get_vlan(struct genl_info *info,
2596                                    struct cfg80211_registered_device *rdev)
2597 {
2598         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2599         struct net_device *v;
2600         int ret;
2601
2602         if (!vlanattr)
2603                 return NULL;
2604
2605         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2606         if (!v)
2607                 return ERR_PTR(-ENODEV);
2608
2609         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2610                 ret = -EINVAL;
2611                 goto error;
2612         }
2613
2614         if (!netif_running(v)) {
2615                 ret = -ENETDOWN;
2616                 goto error;
2617         }
2618
2619         return v;
2620  error:
2621         dev_put(v);
2622         return ERR_PTR(ret);
2623 }
2624
2625 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2626 {
2627         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2628         int err;
2629         struct net_device *dev = info->user_ptr[1];
2630         struct station_parameters params;
2631         u8 *mac_addr = NULL;
2632
2633         memset(&params, 0, sizeof(params));
2634
2635         params.listen_interval = -1;
2636         params.plink_state = -1;
2637
2638         if (info->attrs[NL80211_ATTR_STA_AID])
2639                 return -EINVAL;
2640
2641         if (!info->attrs[NL80211_ATTR_MAC])
2642                 return -EINVAL;
2643
2644         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2645
2646         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2647                 params.supported_rates =
2648                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2649                 params.supported_rates_len =
2650                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2651         }
2652
2653         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2654                 params.listen_interval =
2655                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2656
2657         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2658                 params.ht_capa =
2659                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2660
2661         if (!rdev->ops->change_station)
2662                 return -EOPNOTSUPP;
2663
2664         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2665                 return -EINVAL;
2666
2667         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2668                 params.plink_action =
2669                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2670
2671         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2672                 params.plink_state =
2673                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2674
2675         switch (dev->ieee80211_ptr->iftype) {
2676         case NL80211_IFTYPE_AP:
2677         case NL80211_IFTYPE_AP_VLAN:
2678         case NL80211_IFTYPE_P2P_GO:
2679                 /* disallow mesh-specific things */
2680                 if (params.plink_action)
2681                         return -EINVAL;
2682
2683                 /* TDLS can't be set, ... */
2684                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2685                         return -EINVAL;
2686                 /*
2687                  * ... but don't bother the driver with it. This works around
2688                  * a hostapd/wpa_supplicant issue -- it always includes the
2689                  * TLDS_PEER flag in the mask even for AP mode.
2690                  */
2691                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2692
2693                 /* accept only the listed bits */
2694                 if (params.sta_flags_mask &
2695                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2696                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2697                                   BIT(NL80211_STA_FLAG_WME) |
2698                                   BIT(NL80211_STA_FLAG_MFP)))
2699                         return -EINVAL;
2700
2701                 /* must be last in here for error handling */
2702                 params.vlan = get_vlan(info, rdev);
2703                 if (IS_ERR(params.vlan))
2704                         return PTR_ERR(params.vlan);
2705                 break;
2706         case NL80211_IFTYPE_P2P_CLIENT:
2707         case NL80211_IFTYPE_STATION:
2708                 /*
2709                  * Don't allow userspace to change the TDLS_PEER flag,
2710                  * but silently ignore attempts to change it since we
2711                  * don't have state here to verify that it doesn't try
2712                  * to change the flag.
2713                  */
2714                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2715                 /* fall through */
2716         case NL80211_IFTYPE_ADHOC:
2717                 /* disallow things sta doesn't support */
2718                 if (params.plink_action)
2719                         return -EINVAL;
2720                 if (params.ht_capa)
2721                         return -EINVAL;
2722                 if (params.listen_interval >= 0)
2723                         return -EINVAL;
2724                 /* reject any changes other than AUTHORIZED */
2725                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2726                         return -EINVAL;
2727                 break;
2728         case NL80211_IFTYPE_MESH_POINT:
2729                 /* disallow things mesh doesn't support */
2730                 if (params.vlan)
2731                         return -EINVAL;
2732                 if (params.ht_capa)
2733                         return -EINVAL;
2734                 if (params.listen_interval >= 0)
2735                         return -EINVAL;
2736                 /*
2737                  * No special handling for TDLS here -- the userspace
2738                  * mesh code doesn't have this bug.
2739                  */
2740                 if (params.sta_flags_mask &
2741                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2742                                   BIT(NL80211_STA_FLAG_MFP) |
2743                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2744                         return -EINVAL;
2745                 break;
2746         default:
2747                 return -EOPNOTSUPP;
2748         }
2749
2750         /* be aware of params.vlan when changing code here */
2751
2752         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2753
2754         if (params.vlan)
2755                 dev_put(params.vlan);
2756
2757         return err;
2758 }
2759
2760 static struct nla_policy
2761 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2762         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2763         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2764 };
2765
2766 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2767 {
2768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2769         int err;
2770         struct net_device *dev = info->user_ptr[1];
2771         struct station_parameters params;
2772         u8 *mac_addr = NULL;
2773
2774         memset(&params, 0, sizeof(params));
2775
2776         if (!info->attrs[NL80211_ATTR_MAC])
2777                 return -EINVAL;
2778
2779         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2780                 return -EINVAL;
2781
2782         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2783                 return -EINVAL;
2784
2785         if (!info->attrs[NL80211_ATTR_STA_AID])
2786                 return -EINVAL;
2787
2788         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2789         params.supported_rates =
2790                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2791         params.supported_rates_len =
2792                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2793         params.listen_interval =
2794                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2795
2796         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2797         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2798                 return -EINVAL;
2799
2800         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2801                 params.ht_capa =
2802                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2803
2804         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2805                 params.plink_action =
2806                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2807
2808         if (!rdev->ops->add_station)
2809                 return -EOPNOTSUPP;
2810
2811         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2812                 return -EINVAL;
2813
2814         switch (dev->ieee80211_ptr->iftype) {
2815         case NL80211_IFTYPE_AP:
2816         case NL80211_IFTYPE_AP_VLAN:
2817         case NL80211_IFTYPE_P2P_GO:
2818                 /* parse WME attributes if sta is WME capable */
2819                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2820                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2821                     info->attrs[NL80211_ATTR_STA_WME]) {
2822                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2823                         struct nlattr *nla;
2824
2825                         nla = info->attrs[NL80211_ATTR_STA_WME];
2826                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2827                                                nl80211_sta_wme_policy);
2828                         if (err)
2829                                 return err;
2830
2831                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2832                                 params.uapsd_queues =
2833                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2834                         if (params.uapsd_queues &
2835                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2836                                 return -EINVAL;
2837
2838                         if (tb[NL80211_STA_WME_MAX_SP])
2839                                 params.max_sp =
2840                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2841
2842                         if (params.max_sp &
2843                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2844                                 return -EINVAL;
2845
2846                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2847                 }
2848                 /* TDLS peers cannot be added */
2849                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2850                         return -EINVAL;
2851                 /* but don't bother the driver with it */
2852                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2853
2854                 /* must be last in here for error handling */
2855                 params.vlan = get_vlan(info, rdev);
2856                 if (IS_ERR(params.vlan))
2857                         return PTR_ERR(params.vlan);
2858                 break;
2859         case NL80211_IFTYPE_MESH_POINT:
2860                 /* TDLS peers cannot be added */
2861                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2862                         return -EINVAL;
2863                 break;
2864         case NL80211_IFTYPE_STATION:
2865                 /* Only TDLS peers can be added */
2866                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2867                         return -EINVAL;
2868                 /* Can only add if TDLS ... */
2869                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
2870                         return -EOPNOTSUPP;
2871                 /* ... with external setup is supported */
2872                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
2873                         return -EOPNOTSUPP;
2874                 break;
2875         default:
2876                 return -EOPNOTSUPP;
2877         }
2878
2879         /* be aware of params.vlan when changing code here */
2880
2881         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2882
2883         if (params.vlan)
2884                 dev_put(params.vlan);
2885         return err;
2886 }
2887
2888 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2889 {
2890         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2891         struct net_device *dev = info->user_ptr[1];
2892         u8 *mac_addr = NULL;
2893
2894         if (info->attrs[NL80211_ATTR_MAC])
2895                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2896
2897         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2898             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2899             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2900             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2901                 return -EINVAL;
2902
2903         if (!rdev->ops->del_station)
2904                 return -EOPNOTSUPP;
2905
2906         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2907 }
2908
2909 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2910                                 int flags, struct net_device *dev,
2911                                 u8 *dst, u8 *next_hop,
2912                                 struct mpath_info *pinfo)
2913 {
2914         void *hdr;
2915         struct nlattr *pinfoattr;
2916
2917         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2918         if (!hdr)
2919                 return -1;
2920
2921         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2922         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2923         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2924
2925         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2926
2927         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2928         if (!pinfoattr)
2929                 goto nla_put_failure;
2930         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2931                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2932                             pinfo->frame_qlen);
2933         if (pinfo->filled & MPATH_INFO_SN)
2934                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2935                             pinfo->sn);
2936         if (pinfo->filled & MPATH_INFO_METRIC)
2937                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2938                             pinfo->metric);
2939         if (pinfo->filled & MPATH_INFO_EXPTIME)
2940                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2941                             pinfo->exptime);
2942         if (pinfo->filled & MPATH_INFO_FLAGS)
2943                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2944                             pinfo->flags);
2945         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2946                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2947                             pinfo->discovery_timeout);
2948         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2949                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2950                             pinfo->discovery_retries);
2951
2952         nla_nest_end(msg, pinfoattr);
2953
2954         return genlmsg_end(msg, hdr);
2955
2956  nla_put_failure:
2957         genlmsg_cancel(msg, hdr);
2958         return -EMSGSIZE;
2959 }
2960
2961 static int nl80211_dump_mpath(struct sk_buff *skb,
2962                               struct netlink_callback *cb)
2963 {
2964         struct mpath_info pinfo;
2965         struct cfg80211_registered_device *dev;
2966         struct net_device *netdev;
2967         u8 dst[ETH_ALEN];
2968         u8 next_hop[ETH_ALEN];
2969         int path_idx = cb->args[1];
2970         int err;
2971
2972         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2973         if (err)
2974                 return err;
2975
2976         if (!dev->ops->dump_mpath) {
2977                 err = -EOPNOTSUPP;
2978                 goto out_err;
2979         }
2980
2981         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2982                 err = -EOPNOTSUPP;
2983                 goto out_err;
2984         }
2985
2986         while (1) {
2987                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2988                                            dst, next_hop, &pinfo);
2989                 if (err == -ENOENT)
2990                         break;
2991                 if (err)
2992                         goto out_err;
2993
2994                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2995                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2996                                        netdev, dst, next_hop,
2997                                        &pinfo) < 0)
2998                         goto out;
2999
3000                 path_idx++;
3001         }
3002
3003
3004  out:
3005         cb->args[1] = path_idx;
3006         err = skb->len;
3007  out_err:
3008         nl80211_finish_netdev_dump(dev);
3009         return err;
3010 }
3011
3012 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3013 {
3014         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3015         int err;
3016         struct net_device *dev = info->user_ptr[1];
3017         struct mpath_info pinfo;
3018         struct sk_buff *msg;
3019         u8 *dst = NULL;
3020         u8 next_hop[ETH_ALEN];
3021
3022         memset(&pinfo, 0, sizeof(pinfo));
3023
3024         if (!info->attrs[NL80211_ATTR_MAC])
3025                 return -EINVAL;
3026
3027         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3028
3029         if (!rdev->ops->get_mpath)
3030                 return -EOPNOTSUPP;
3031
3032         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3033                 return -EOPNOTSUPP;
3034
3035         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3036         if (err)
3037                 return err;
3038
3039         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3040         if (!msg)
3041                 return -ENOMEM;
3042
3043         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3044                                  dev, dst, next_hop, &pinfo) < 0) {
3045                 nlmsg_free(msg);
3046                 return -ENOBUFS;
3047         }
3048
3049         return genlmsg_reply(msg, info);
3050 }
3051
3052 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3053 {
3054         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3055         struct net_device *dev = info->user_ptr[1];
3056         u8 *dst = NULL;
3057         u8 *next_hop = NULL;
3058
3059         if (!info->attrs[NL80211_ATTR_MAC])
3060                 return -EINVAL;
3061
3062         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3063                 return -EINVAL;
3064
3065         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3066         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3067
3068         if (!rdev->ops->change_mpath)
3069                 return -EOPNOTSUPP;
3070
3071         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3072                 return -EOPNOTSUPP;
3073
3074         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3075 }
3076
3077 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3078 {
3079         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3080         struct net_device *dev = info->user_ptr[1];
3081         u8 *dst = NULL;
3082         u8 *next_hop = NULL;
3083
3084         if (!info->attrs[NL80211_ATTR_MAC])
3085                 return -EINVAL;
3086
3087         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3088                 return -EINVAL;
3089
3090         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3091         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3092
3093         if (!rdev->ops->add_mpath)
3094                 return -EOPNOTSUPP;
3095
3096         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3097                 return -EOPNOTSUPP;
3098
3099         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3100 }
3101
3102 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3103 {
3104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3105         struct net_device *dev = info->user_ptr[1];
3106         u8 *dst = NULL;
3107
3108         if (info->attrs[NL80211_ATTR_MAC])
3109                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3110
3111         if (!rdev->ops->del_mpath)
3112                 return -EOPNOTSUPP;
3113
3114         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3115 }
3116
3117 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3118 {
3119         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3120         struct net_device *dev = info->user_ptr[1];
3121         struct bss_parameters params;
3122
3123         memset(&params, 0, sizeof(params));
3124         /* default to not changing parameters */
3125         params.use_cts_prot = -1;
3126         params.use_short_preamble = -1;
3127         params.use_short_slot_time = -1;
3128         params.ap_isolate = -1;
3129         params.ht_opmode = -1;
3130
3131         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3132                 params.use_cts_prot =
3133                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3134         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3135                 params.use_short_preamble =
3136                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3137         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3138                 params.use_short_slot_time =
3139                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3140         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3141                 params.basic_rates =
3142                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3143                 params.basic_rates_len =
3144                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3145         }
3146         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3147                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3148         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3149                 params.ht_opmode =
3150                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3151
3152         if (!rdev->ops->change_bss)
3153                 return -EOPNOTSUPP;
3154
3155         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3156             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3157                 return -EOPNOTSUPP;
3158
3159         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3160 }
3161
3162 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3163         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3164         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3165         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3166         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3167         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3168         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3169 };
3170
3171 static int parse_reg_rule(struct nlattr *tb[],
3172         struct ieee80211_reg_rule *reg_rule)
3173 {
3174         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3175         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3176
3177         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3178                 return -EINVAL;
3179         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3180                 return -EINVAL;
3181         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3182                 return -EINVAL;
3183         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3184                 return -EINVAL;
3185         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3186                 return -EINVAL;
3187
3188         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3189
3190         freq_range->start_freq_khz =
3191                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3192         freq_range->end_freq_khz =
3193                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3194         freq_range->max_bandwidth_khz =
3195                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3196
3197         power_rule->max_eirp =
3198                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3199
3200         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3201                 power_rule->max_antenna_gain =
3202                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3203
3204         return 0;
3205 }
3206
3207 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3208 {
3209         int r;
3210         char *data = NULL;
3211
3212         /*
3213          * You should only get this when cfg80211 hasn't yet initialized
3214          * completely when built-in to the kernel right between the time
3215          * window between nl80211_init() and regulatory_init(), if that is
3216          * even possible.
3217          */
3218         mutex_lock(&cfg80211_mutex);
3219         if (unlikely(!cfg80211_regdomain)) {
3220                 mutex_unlock(&cfg80211_mutex);
3221                 return -EINPROGRESS;
3222         }
3223         mutex_unlock(&cfg80211_mutex);
3224
3225         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3226                 return -EINVAL;
3227
3228         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3229
3230         r = regulatory_hint_user(data);
3231
3232         return r;
3233 }
3234
3235 static int nl80211_get_mesh_config(struct sk_buff *skb,
3236                                    struct genl_info *info)
3237 {
3238         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3239         struct net_device *dev = info->user_ptr[1];
3240         struct wireless_dev *wdev = dev->ieee80211_ptr;
3241         struct mesh_config cur_params;
3242         int err = 0;
3243         void *hdr;
3244         struct nlattr *pinfoattr;
3245         struct sk_buff *msg;
3246
3247         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3248                 return -EOPNOTSUPP;
3249
3250         if (!rdev->ops->get_mesh_config)
3251                 return -EOPNOTSUPP;
3252
3253         wdev_lock(wdev);
3254         /* If not connected, get default parameters */
3255         if (!wdev->mesh_id_len)
3256                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3257         else
3258                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3259                                                  &cur_params);
3260         wdev_unlock(wdev);
3261
3262         if (err)
3263                 return err;
3264
3265         /* Draw up a netlink message to send back */
3266         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3267         if (!msg)
3268                 return -ENOMEM;
3269         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3270                              NL80211_CMD_GET_MESH_CONFIG);
3271         if (!hdr)
3272                 goto out;
3273         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3274         if (!pinfoattr)
3275                 goto nla_put_failure;
3276         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3277         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3278                         cur_params.dot11MeshRetryTimeout);
3279         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3280                         cur_params.dot11MeshConfirmTimeout);
3281         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3282                         cur_params.dot11MeshHoldingTimeout);
3283         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3284                         cur_params.dot11MeshMaxPeerLinks);
3285         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3286                         cur_params.dot11MeshMaxRetries);
3287         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3288                         cur_params.dot11MeshTTL);
3289         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3290                         cur_params.element_ttl);
3291         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3292                         cur_params.auto_open_plinks);
3293         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3294                         cur_params.dot11MeshHWMPmaxPREQretries);
3295         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3296                         cur_params.path_refresh_time);
3297         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3298                         cur_params.min_discovery_timeout);
3299         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3300                         cur_params.dot11MeshHWMPactivePathTimeout);
3301         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3302                         cur_params.dot11MeshHWMPpreqMinInterval);
3303         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3304                         cur_params.dot11MeshHWMPperrMinInterval);
3305         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3306                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3307         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3308                         cur_params.dot11MeshHWMPRootMode);
3309         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3310                         cur_params.dot11MeshHWMPRannInterval);
3311         NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3312                         cur_params.dot11MeshGateAnnouncementProtocol);
3313         NLA_PUT_U8(msg, NL80211_MESHCONF_FORWARDING,
3314                         cur_params.dot11MeshForwarding);
3315         NLA_PUT_U32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3316                         cur_params.rssi_threshold);
3317         nla_nest_end(msg, pinfoattr);
3318         genlmsg_end(msg, hdr);
3319         return genlmsg_reply(msg, info);
3320
3321  nla_put_failure:
3322         genlmsg_cancel(msg, hdr);
3323  out:
3324         nlmsg_free(msg);
3325         return -ENOBUFS;
3326 }
3327
3328 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3329         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3330         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3331         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3332         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3333         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3334         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3335         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3336         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3337
3338         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3339         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3340         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3341         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3342         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3343         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3344         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3345         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3346         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3347         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3348         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3349         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32},
3350 };
3351
3352 static const struct nla_policy
3353         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3354         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3355         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3356         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3357         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3358                 .len = IEEE80211_MAX_DATA_LEN },
3359         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3360 };
3361
3362 static int nl80211_parse_mesh_config(struct genl_info *info,
3363                                      struct mesh_config *cfg,
3364                                      u32 *mask_out)
3365 {
3366         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3367         u32 mask = 0;
3368
3369 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3370 do {\
3371         if (table[attr_num]) {\
3372                 cfg->param = nla_fn(table[attr_num]); \
3373                 mask |= (1 << (attr_num - 1)); \
3374         } \
3375 } while (0);\
3376
3377
3378         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3379                 return -EINVAL;
3380         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3381                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3382                              nl80211_meshconf_params_policy))
3383                 return -EINVAL;
3384
3385         /* This makes sure that there aren't more than 32 mesh config
3386          * parameters (otherwise our bitfield scheme would not work.) */
3387         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3388
3389         /* Fill in the params struct */
3390         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3391                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3392         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3393                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3394         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3395                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3396         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3397                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3398         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3399                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3400         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3401                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3402         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3403                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3404         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3405                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3406         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3407                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3408                         nla_get_u8);
3409         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3410                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3411         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3412                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3413                         nla_get_u16);
3414         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3415                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3416                         nla_get_u32);
3417         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3418                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3419                         nla_get_u16);
3420         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3421                         mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3422                         nla_get_u16);
3423         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3424                         dot11MeshHWMPnetDiameterTraversalTime,
3425                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3426                         nla_get_u16);
3427         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3428                         dot11MeshHWMPRootMode, mask,
3429                         NL80211_MESHCONF_HWMP_ROOTMODE,
3430                         nla_get_u8);
3431         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3432                         dot11MeshHWMPRannInterval, mask,
3433                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3434                         nla_get_u16);
3435         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3436                         dot11MeshGateAnnouncementProtocol, mask,
3437                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3438                         nla_get_u8);
3439         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3440                         mask, NL80211_MESHCONF_FORWARDING, nla_get_u8);
3441         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3442                         mask, NL80211_MESHCONF_RSSI_THRESHOLD, nla_get_u32);
3443         if (mask_out)
3444                 *mask_out = mask;
3445
3446         return 0;
3447
3448 #undef FILL_IN_MESH_PARAM_IF_SET
3449 }
3450
3451 static int nl80211_parse_mesh_setup(struct genl_info *info,
3452                                      struct mesh_setup *setup)
3453 {
3454         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3455
3456         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3457                 return -EINVAL;
3458         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3459                              info->attrs[NL80211_ATTR_MESH_SETUP],
3460                              nl80211_mesh_setup_params_policy))
3461                 return -EINVAL;
3462
3463         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3464                 setup->path_sel_proto =
3465                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3466                  IEEE80211_PATH_PROTOCOL_VENDOR :
3467                  IEEE80211_PATH_PROTOCOL_HWMP;
3468
3469         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3470                 setup->path_metric =
3471                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3472                  IEEE80211_PATH_METRIC_VENDOR :
3473                  IEEE80211_PATH_METRIC_AIRTIME;
3474
3475
3476         if (tb[NL80211_MESH_SETUP_IE]) {
3477                 struct nlattr *ieattr =
3478                         tb[NL80211_MESH_SETUP_IE];
3479                 if (!is_valid_ie_attr(ieattr))
3480                         return -EINVAL;
3481                 setup->ie = nla_data(ieattr);
3482                 setup->ie_len = nla_len(ieattr);
3483         }
3484         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3485         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3486
3487         return 0;
3488 }
3489
3490 static int nl80211_update_mesh_config(struct sk_buff *skb,
3491                                       struct genl_info *info)
3492 {
3493         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3494         struct net_device *dev = info->user_ptr[1];
3495         struct wireless_dev *wdev = dev->ieee80211_ptr;
3496         struct mesh_config cfg;
3497         u32 mask;
3498         int err;
3499
3500         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3501                 return -EOPNOTSUPP;
3502
3503         if (!rdev->ops->update_mesh_config)
3504                 return -EOPNOTSUPP;
3505
3506         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3507         if (err)
3508                 return err;
3509
3510         wdev_lock(wdev);
3511         if (!wdev->mesh_id_len)
3512                 err = -ENOLINK;
3513
3514         if (!err)
3515                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3516                                                     mask, &cfg);
3517
3518         wdev_unlock(wdev);
3519
3520         return err;
3521 }
3522
3523 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3524 {
3525         struct sk_buff *msg;
3526         void *hdr = NULL;
3527         struct nlattr *nl_reg_rules;
3528         unsigned int i;
3529         int err = -EINVAL;
3530
3531         mutex_lock(&cfg80211_mutex);
3532
3533         if (!cfg80211_regdomain)
3534                 goto out;
3535
3536         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3537         if (!msg) {
3538                 err = -ENOBUFS;
3539                 goto out;
3540         }
3541
3542         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3543                              NL80211_CMD_GET_REG);
3544         if (!hdr)
3545                 goto put_failure;
3546
3547         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3548                 cfg80211_regdomain->alpha2);
3549         if (cfg80211_regdomain->dfs_region)
3550                 NLA_PUT_U8(msg, NL80211_ATTR_DFS_REGION,
3551                            cfg80211_regdomain->dfs_region);
3552
3553         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3554         if (!nl_reg_rules)
3555                 goto nla_put_failure;
3556
3557         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3558                 struct nlattr *nl_reg_rule;
3559                 const struct ieee80211_reg_rule *reg_rule;
3560                 const struct ieee80211_freq_range *freq_range;
3561                 const struct ieee80211_power_rule *power_rule;
3562
3563                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3564                 freq_range = &reg_rule->freq_range;
3565                 power_rule = &reg_rule->power_rule;
3566
3567                 nl_reg_rule = nla_nest_start(msg, i);
3568                 if (!nl_reg_rule)
3569                         goto nla_put_failure;
3570
3571                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3572                         reg_rule->flags);
3573                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3574                         freq_range->start_freq_khz);
3575                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3576                         freq_range->end_freq_khz);
3577                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3578                         freq_range->max_bandwidth_khz);
3579                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3580                         power_rule->max_antenna_gain);
3581                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3582                         power_rule->max_eirp);
3583
3584                 nla_nest_end(msg, nl_reg_rule);
3585         }
3586
3587         nla_nest_end(msg, nl_reg_rules);
3588
3589         genlmsg_end(msg, hdr);
3590         err = genlmsg_reply(msg, info);
3591         goto out;
3592
3593 nla_put_failure:
3594         genlmsg_cancel(msg, hdr);
3595 put_failure:
3596         nlmsg_free(msg);
3597         err = -EMSGSIZE;
3598 out:
3599         mutex_unlock(&cfg80211_mutex);
3600         return err;
3601 }
3602
3603 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3604 {
3605         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3606         struct nlattr *nl_reg_rule;
3607         char *alpha2 = NULL;
3608         int rem_reg_rules = 0, r = 0;
3609         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3610         u8 dfs_region = 0;
3611         struct ieee80211_regdomain *rd = NULL;
3612
3613         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3614                 return -EINVAL;
3615
3616         if (!info->attrs[NL80211_ATTR_REG_RULES])
3617                 return -EINVAL;
3618
3619         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3620
3621         if (info->attrs[NL80211_ATTR_DFS_REGION])
3622                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3623
3624         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3625                         rem_reg_rules) {
3626                 num_rules++;
3627                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3628                         return -EINVAL;
3629         }
3630
3631         mutex_lock(&cfg80211_mutex);
3632
3633         if (!reg_is_valid_request(alpha2)) {
3634                 r = -EINVAL;
3635                 goto bad_reg;
3636         }
3637
3638         size_of_regd = sizeof(struct ieee80211_regdomain) +
3639                 (num_rules * sizeof(struct ieee80211_reg_rule));
3640
3641         rd = kzalloc(size_of_regd, GFP_KERNEL);
3642         if (!rd) {
3643                 r = -ENOMEM;
3644                 goto bad_reg;
3645         }
3646
3647         rd->n_reg_rules = num_rules;
3648         rd->alpha2[0] = alpha2[0];
3649         rd->alpha2[1] = alpha2[1];
3650
3651         /*
3652          * Disable DFS master mode if the DFS region was
3653          * not supported or known on this kernel.
3654          */
3655         if (reg_supported_dfs_region(dfs_region))
3656                 rd->dfs_region = dfs_region;
3657
3658         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3659                         rem_reg_rules) {
3660                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3661                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3662                         reg_rule_policy);
3663                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3664                 if (r)
3665                         goto bad_reg;
3666
3667                 rule_idx++;
3668
3669                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3670                         r = -EINVAL;
3671                         goto bad_reg;
3672                 }
3673         }
3674
3675         BUG_ON(rule_idx != num_rules);
3676
3677         r = set_regdom(rd);
3678
3679         mutex_unlock(&cfg80211_mutex);
3680
3681         return r;
3682
3683  bad_reg:
3684         mutex_unlock(&cfg80211_mutex);
3685         kfree(rd);
3686         return r;
3687 }
3688
3689 static int validate_scan_freqs(struct nlattr *freqs)
3690 {
3691         struct nlattr *attr1, *attr2;
3692         int n_channels = 0, tmp1, tmp2;
3693
3694         nla_for_each_nested(attr1, freqs, tmp1) {
3695                 n_channels++;
3696                 /*
3697                  * Some hardware has a limited channel list for
3698                  * scanning, and it is pretty much nonsensical
3699                  * to scan for a channel twice, so disallow that
3700                  * and don't require drivers to check that the
3701                  * channel list they get isn't longer than what
3702                  * they can scan, as long as they can scan all
3703                  * the channels they registered at once.
3704                  */
3705                 nla_for_each_nested(attr2, freqs, tmp2)
3706                         if (attr1 != attr2 &&
3707                             nla_get_u32(attr1) == nla_get_u32(attr2))
3708                                 return 0;
3709         }
3710
3711         return n_channels;
3712 }
3713
3714 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3715 {
3716         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3717         struct net_device *dev = info->user_ptr[1];
3718         struct cfg80211_scan_request *request;
3719         struct nlattr *attr;
3720         struct wiphy *wiphy;
3721         int err, tmp, n_ssids = 0, n_channels, i;
3722         size_t ie_len;
3723
3724         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3725                 return -EINVAL;
3726
3727         wiphy = &rdev->wiphy;
3728
3729         if (!rdev->ops->scan)
3730                 return -EOPNOTSUPP;
3731
3732         if (rdev->scan_req)
3733                 return -EBUSY;
3734
3735         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3736                 n_channels = validate_scan_freqs(
3737                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3738                 if (!n_channels)
3739                         return -EINVAL;
3740         } else {
3741                 enum ieee80211_band band;
3742                 n_channels = 0;
3743
3744                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3745                         if (wiphy->bands[band])
3746                                 n_channels += wiphy->bands[band]->n_channels;
3747         }
3748
3749         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3750                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3751                         n_ssids++;
3752
3753         if (n_ssids > wiphy->max_scan_ssids)
3754                 return -EINVAL;
3755
3756         if (info->attrs[NL80211_ATTR_IE])
3757                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3758         else
3759                 ie_len = 0;
3760
3761         if (ie_len > wiphy->max_scan_ie_len)
3762                 return -EINVAL;
3763
3764         request = kzalloc(sizeof(*request)
3765                         + sizeof(*request->ssids) * n_ssids
3766                         + sizeof(*request->channels) * n_channels
3767                         + ie_len, GFP_KERNEL);
3768         if (!request)
3769                 return -ENOMEM;
3770
3771         if (n_ssids)
3772                 request->ssids = (void *)&request->channels[n_channels];
3773         request->n_ssids = n_ssids;
3774         if (ie_len) {
3775                 if (request->ssids)
3776                         request->ie = (void *)(request->ssids + n_ssids);
3777                 else
3778                         request->ie = (void *)(request->channels + n_channels);
3779         }
3780
3781         i = 0;
3782         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3783                 /* user specified, bail out if channel not found */
3784                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3785                         struct ieee80211_channel *chan;
3786
3787                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3788
3789                         if (!chan) {
3790                                 err = -EINVAL;
3791                                 goto out_free;
3792                         }
3793
3794                         /* ignore disabled channels */
3795                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3796                                 continue;
3797
3798                         request->channels[i] = chan;
3799                         i++;
3800                 }
3801         } else {
3802                 enum ieee80211_band band;
3803
3804                 /* all channels */
3805                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3806                         int j;
3807                         if (!wiphy->bands[band])
3808                                 continue;
3809                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3810                                 struct ieee80211_channel *chan;
3811
3812                                 chan = &wiphy->bands[band]->channels[j];
3813
3814                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3815                                         continue;
3816
3817                                 request->channels[i] = chan;
3818                                 i++;
3819                         }
3820                 }
3821         }
3822
3823         if (!i) {
3824                 err = -EINVAL;
3825                 goto out_free;
3826         }
3827
3828         request->n_channels = i;
3829
3830         i = 0;
3831         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3832                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3833                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3834                                 err = -EINVAL;
3835                                 goto out_free;
3836                         }
3837                         request->ssids[i].ssid_len = nla_len(attr);
3838                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3839                         i++;
3840                 }
3841         }
3842
3843         if (info->attrs[NL80211_ATTR_IE]) {
3844                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3845                 memcpy((void *)request->ie,
3846                        nla_data(info->attrs[NL80211_ATTR_IE]),
3847                        request->ie_len);
3848         }
3849
3850         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3851                 if (wiphy->bands[i])
3852                         request->rates[i] =
3853                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3854
3855         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3856                 nla_for_each_nested(attr,
3857                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3858                                     tmp) {
3859                         enum ieee80211_band band = nla_type(attr);
3860
3861                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3862                                 err = -EINVAL;
3863                                 goto out_free;
3864                         }
3865                         err = ieee80211_get_ratemask(wiphy->bands[band],
3866                                                      nla_data(attr),
3867                                                      nla_len(attr),
3868                                                      &request->rates[band]);
3869                         if (err)
3870                                 goto out_free;
3871                 }
3872         }
3873
3874         request->no_cck =
3875                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3876
3877         request->dev = dev;
3878         request->wiphy = &rdev->wiphy;
3879
3880         rdev->scan_req = request;
3881         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3882
3883         if (!err) {
3884                 nl80211_send_scan_start(rdev, dev);
3885                 dev_hold(dev);
3886         } else {
3887  out_free:
3888                 rdev->scan_req = NULL;
3889                 kfree(request);
3890         }
3891
3892         return err;
3893 }
3894
3895 static int nl80211_start_sched_scan(struct sk_buff *skb,
3896                                     struct genl_info *info)
3897 {
3898         struct cfg80211_sched_scan_request *request;
3899         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3900         struct net_device *dev = info->user_ptr[1];
3901         struct nlattr *attr;
3902         struct wiphy *wiphy;
3903         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3904         u32 interval;
3905         enum ieee80211_band band;
3906         size_t ie_len;
3907         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3908
3909         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3910             !rdev->ops->sched_scan_start)
3911                 return -EOPNOTSUPP;
3912
3913         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3914                 return -EINVAL;
3915
3916         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3917                 return -EINVAL;
3918
3919         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3920         if (interval == 0)
3921                 return -EINVAL;
3922
3923         wiphy = &rdev->wiphy;
3924
3925         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3926                 n_channels = validate_scan_freqs(
3927                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3928                 if (!n_channels)
3929                         return -EINVAL;
3930         } else {
3931                 n_channels = 0;
3932
3933                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3934                         if (wiphy->bands[band])
3935                                 n_channels += wiphy->bands[band]->n_channels;
3936         }
3937
3938         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3939                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3940                                     tmp)
3941                         n_ssids++;
3942
3943         if (n_ssids > wiphy->max_sched_scan_ssids)
3944                 return -EINVAL;
3945
3946         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3947                 nla_for_each_nested(attr,
3948                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3949                                     tmp)
3950                         n_match_sets++;
3951
3952         if (n_match_sets > wiphy->max_match_sets)
3953                 return -EINVAL;
3954
3955         if (info->attrs[NL80211_ATTR_IE])
3956                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3957         else
3958                 ie_len = 0;
3959
3960         if (ie_len > wiphy->max_sched_scan_ie_len)
3961                 return -EINVAL;
3962
3963         mutex_lock(&rdev->sched_scan_mtx);
3964
3965         if (rdev->sched_scan_req) {
3966                 err = -EINPROGRESS;
3967                 goto out;
3968         }
3969
3970         request = kzalloc(sizeof(*request)
3971                         + sizeof(*request->ssids) * n_ssids
3972                         + sizeof(*request->match_sets) * n_match_sets
3973                         + sizeof(*request->channels) * n_channels
3974                         + ie_len, GFP_KERNEL);
3975         if (!request) {
3976                 err = -ENOMEM;
3977                 goto out;
3978         }
3979
3980         if (n_ssids)
3981                 request->ssids = (void *)&request->channels[n_channels];
3982         request->n_ssids = n_ssids;
3983         if (ie_len) {
3984                 if (request->ssids)
3985                         request->ie = (void *)(request->ssids + n_ssids);
3986                 else
3987                         request->ie = (void *)(request->channels + n_channels);
3988         }
3989
3990         if (n_match_sets) {
3991                 if (request->ie)
3992                         request->match_sets = (void *)(request->ie + ie_len);
3993                 else if (request->ssids)
3994                         request->match_sets =
3995                                 (void *)(request->ssids + n_ssids);
3996                 else
3997                         request->match_sets =
3998                                 (void *)(request->channels + n_channels);
3999         }
4000         request->n_match_sets = n_match_sets;
4001
4002         i = 0;
4003         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4004                 /* user specified, bail out if channel not found */
4005                 nla_for_each_nested(attr,
4006                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4007                                     tmp) {
4008                         struct ieee80211_channel *chan;
4009
4010                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4011
4012                         if (!chan) {
4013                                 err = -EINVAL;
4014                                 goto out_free;
4015                         }
4016
4017                         /* ignore disabled channels */
4018                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4019                                 continue;
4020
4021                         request->channels[i] = chan;
4022                         i++;
4023                 }
4024         } else {
4025                 /* all channels */
4026                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4027                         int j;
4028                         if (!wiphy->bands[band])
4029                                 continue;
4030                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4031                                 struct ieee80211_channel *chan;
4032
4033                                 chan = &wiphy->bands[band]->channels[j];
4034
4035                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4036                                         continue;
4037
4038                                 request->channels[i] = chan;
4039                                 i++;
4040                         }
4041                 }
4042         }
4043
4044         if (!i) {
4045                 err = -EINVAL;
4046                 goto out_free;
4047         }
4048
4049         request->n_channels = i;
4050
4051         i = 0;
4052         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4053                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4054                                     tmp) {
4055                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4056                                 err = -EINVAL;
4057                                 goto out_free;
4058                         }
4059                         request->ssids[i].ssid_len = nla_len(attr);
4060                         memcpy(request->ssids[i].ssid, nla_data(attr),
4061                                nla_len(attr));
4062                         i++;
4063                 }
4064         }
4065
4066         i = 0;
4067         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4068                 nla_for_each_nested(attr,
4069                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4070                                     tmp) {
4071                         struct nlattr *ssid;
4072
4073                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4074                                   nla_data(attr), nla_len(attr),
4075                                   nl80211_match_policy);
4076                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
4077                         if (ssid) {
4078                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4079                                         err = -EINVAL;
4080                                         goto out_free;
4081                                 }
4082                                 memcpy(request->match_sets[i].ssid.ssid,
4083                                        nla_data(ssid), nla_len(ssid));
4084                                 request->match_sets[i].ssid.ssid_len =
4085                                         nla_len(ssid);
4086                         }
4087                         i++;
4088                 }
4089         }
4090
4091         if (info->attrs[NL80211_ATTR_IE]) {
4092                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4093                 memcpy((void *)request->ie,
4094                        nla_data(info->attrs[NL80211_ATTR_IE]),
4095                        request->ie_len);
4096         }
4097
4098         request->dev = dev;
4099         request->wiphy = &rdev->wiphy;
4100         request->interval = interval;
4101
4102         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4103         if (!err) {
4104                 rdev->sched_scan_req = request;
4105                 nl80211_send_sched_scan(rdev, dev,
4106                                         NL80211_CMD_START_SCHED_SCAN);
4107                 goto out;
4108         }
4109
4110 out_free:
4111         kfree(request);
4112 out:
4113         mutex_unlock(&rdev->sched_scan_mtx);
4114         return err;
4115 }
4116
4117 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4118                                    struct genl_info *info)
4119 {
4120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4121         int err;
4122
4123         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4124             !rdev->ops->sched_scan_stop)
4125                 return -EOPNOTSUPP;
4126
4127         mutex_lock(&rdev->sched_scan_mtx);
4128         err = __cfg80211_stop_sched_scan(rdev, false);
4129         mutex_unlock(&rdev->sched_scan_mtx);
4130
4131         return err;
4132 }
4133
4134 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4135                             u32 seq, int flags,
4136                             struct cfg80211_registered_device *rdev,
4137                             struct wireless_dev *wdev,
4138                             struct cfg80211_internal_bss *intbss)
4139 {
4140         struct cfg80211_bss *res = &intbss->pub;
4141         void *hdr;
4142         struct nlattr *bss;
4143
4144         ASSERT_WDEV_LOCK(wdev);
4145
4146         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4147                              NL80211_CMD_NEW_SCAN_RESULTS);
4148         if (!hdr)
4149                 return -1;
4150
4151         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4152
4153         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
4154         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
4155
4156         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4157         if (!bss)
4158                 goto nla_put_failure;
4159         if (!is_zero_ether_addr(res->bssid))
4160                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
4161         if (res->information_elements && res->len_information_elements)
4162                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4163                         res->len_information_elements,
4164                         res->information_elements);
4165         if (res->beacon_ies && res->len_beacon_ies &&
4166             res->beacon_ies != res->information_elements)
4167                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
4168                         res->len_beacon_ies, res->beacon_ies);
4169         if (res->tsf)
4170                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
4171         if (res->beacon_interval)
4172                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
4173         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
4174         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
4175         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
4176                 jiffies_to_msecs(jiffies - intbss->ts));
4177
4178         switch (rdev->wiphy.signal_type) {
4179         case CFG80211_SIGNAL_TYPE_MBM:
4180                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
4181                 break;
4182         case CFG80211_SIGNAL_TYPE_UNSPEC:
4183                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
4184                 break;
4185         default:
4186                 break;
4187         }
4188
4189         switch (wdev->iftype) {
4190         case NL80211_IFTYPE_P2P_CLIENT:
4191         case NL80211_IFTYPE_STATION:
4192                 if (intbss == wdev->current_bss)
4193                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4194                                     NL80211_BSS_STATUS_ASSOCIATED);
4195                 break;
4196         case NL80211_IFTYPE_ADHOC:
4197                 if (intbss == wdev->current_bss)
4198                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4199                                     NL80211_BSS_STATUS_IBSS_JOINED);
4200                 break;
4201         default:
4202                 break;
4203         }
4204
4205         nla_nest_end(msg, bss);
4206
4207         return genlmsg_end(msg, hdr);
4208
4209  nla_put_failure:
4210         genlmsg_cancel(msg, hdr);
4211         return -EMSGSIZE;
4212 }
4213
4214 static int nl80211_dump_scan(struct sk_buff *skb,
4215                              struct netlink_callback *cb)
4216 {
4217         struct cfg80211_registered_device *rdev;
4218         struct net_device *dev;
4219         struct cfg80211_internal_bss *scan;
4220         struct wireless_dev *wdev;
4221         int start = cb->args[1], idx = 0;
4222         int err;
4223
4224         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4225         if (err)
4226                 return err;
4227
4228         wdev = dev->ieee80211_ptr;
4229
4230         wdev_lock(wdev);
4231         spin_lock_bh(&rdev->bss_lock);
4232         cfg80211_bss_expire(rdev);
4233
4234         cb->seq = rdev->bss_generation;
4235
4236         list_for_each_entry(scan, &rdev->bss_list, list) {
4237                 if (++idx <= start)
4238                         continue;
4239                 if (nl80211_send_bss(skb, cb,
4240                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4241                                 rdev, wdev, scan) < 0) {
4242                         idx--;
4243                         break;
4244                 }
4245         }
4246
4247         spin_unlock_bh(&rdev->bss_lock);
4248         wdev_unlock(wdev);
4249
4250         cb->args[1] = idx;
4251         nl80211_finish_netdev_dump(rdev);
4252
4253         return skb->len;
4254 }
4255
4256 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4257                                 int flags, struct net_device *dev,
4258                                 struct survey_info *survey)
4259 {
4260         void *hdr;
4261         struct nlattr *infoattr;
4262
4263         hdr = nl80211hdr_put(msg, pid, seq, flags,
4264                              NL80211_CMD_NEW_SURVEY_RESULTS);
4265         if (!hdr)
4266                 return -ENOMEM;
4267
4268         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4269
4270         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4271         if (!infoattr)
4272                 goto nla_put_failure;
4273
4274         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4275                     survey->channel->center_freq);
4276         if (survey->filled & SURVEY_INFO_NOISE_DBM)
4277                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4278                             survey->noise);
4279         if (survey->filled & SURVEY_INFO_IN_USE)
4280                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4281         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4282                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4283                             survey->channel_time);
4284         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4285                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4286                             survey->channel_time_busy);
4287         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4288                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4289                             survey->channel_time_ext_busy);
4290         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4291                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4292                             survey->channel_time_rx);
4293         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4294                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4295                             survey->channel_time_tx);
4296
4297         nla_nest_end(msg, infoattr);
4298
4299         return genlmsg_end(msg, hdr);
4300
4301  nla_put_failure:
4302         genlmsg_cancel(msg, hdr);
4303         return -EMSGSIZE;
4304 }
4305
4306 static int nl80211_dump_survey(struct sk_buff *skb,
4307                         struct netlink_callback *cb)
4308 {
4309         struct survey_info survey;
4310         struct cfg80211_registered_device *dev;
4311         struct net_device *netdev;
4312         int survey_idx = cb->args[1];
4313         int res;
4314
4315         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4316         if (res)
4317                 return res;
4318
4319         if (!dev->ops->dump_survey) {
4320                 res = -EOPNOTSUPP;
4321                 goto out_err;
4322         }
4323
4324         while (1) {
4325                 struct ieee80211_channel *chan;
4326
4327                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4328                                             &survey);
4329                 if (res == -ENOENT)
4330                         break;
4331                 if (res)
4332                         goto out_err;
4333
4334                 /* Survey without a channel doesn't make sense */
4335                 if (!survey.channel) {
4336                         res = -EINVAL;
4337                         goto out;
4338                 }
4339
4340                 chan = ieee80211_get_channel(&dev->wiphy,
4341                                              survey.channel->center_freq);
4342                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4343                         survey_idx++;
4344                         continue;
4345                 }
4346
4347                 if (nl80211_send_survey(skb,
4348                                 NETLINK_CB(cb->skb).pid,
4349                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4350                                 netdev,
4351                                 &survey) < 0)
4352                         goto out;
4353                 survey_idx++;
4354         }
4355
4356  out:
4357         cb->args[1] = survey_idx;
4358         res = skb->len;
4359  out_err:
4360         nl80211_finish_netdev_dump(dev);
4361         return res;
4362 }
4363
4364 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4365 {
4366         return auth_type <= NL80211_AUTHTYPE_MAX;
4367 }
4368
4369 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4370 {
4371         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4372                                   NL80211_WPA_VERSION_2));
4373 }
4374
4375 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4376 {
4377         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4378         struct net_device *dev = info->user_ptr[1];
4379         struct ieee80211_channel *chan;
4380         const u8 *bssid, *ssid, *ie = NULL;
4381         int err, ssid_len, ie_len = 0;
4382         enum nl80211_auth_type auth_type;
4383         struct key_parse key;
4384         bool local_state_change;
4385
4386         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4387                 return -EINVAL;
4388
4389         if (!info->attrs[NL80211_ATTR_MAC])
4390                 return -EINVAL;
4391
4392         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4393                 return -EINVAL;
4394
4395         if (!info->attrs[NL80211_ATTR_SSID])
4396                 return -EINVAL;
4397
4398         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4399                 return -EINVAL;
4400
4401         err = nl80211_parse_key(info, &key);
4402         if (err)
4403                 return err;
4404
4405         if (key.idx >= 0) {
4406                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4407                         return -EINVAL;
4408                 if (!key.p.key || !key.p.key_len)
4409                         return -EINVAL;
4410                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4411                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4412                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4413                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4414                         return -EINVAL;
4415                 if (key.idx > 4)
4416                         return -EINVAL;
4417         } else {
4418                 key.p.key_len = 0;
4419                 key.p.key = NULL;
4420         }
4421
4422         if (key.idx >= 0) {
4423                 int i;
4424                 bool ok = false;
4425                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4426                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4427                                 ok = true;
4428                                 break;
4429                         }
4430                 }
4431                 if (!ok)
4432                         return -EINVAL;
4433         }
4434
4435         if (!rdev->ops->auth)
4436                 return -EOPNOTSUPP;
4437
4438         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4439             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4440                 return -EOPNOTSUPP;
4441
4442         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4443         chan = ieee80211_get_channel(&rdev->wiphy,
4444                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4445         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4446                 return -EINVAL;
4447
4448         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4449         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4450
4451         if (info->attrs[NL80211_ATTR_IE]) {
4452                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4453                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4454         }
4455
4456         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4457         if (!nl80211_valid_auth_type(auth_type))
4458                 return -EINVAL;
4459
4460         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4461
4462         /*
4463          * Since we no longer track auth state, ignore
4464          * requests to only change local state.
4465          */
4466         if (local_state_change)
4467                 return 0;
4468
4469         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4470                                   ssid, ssid_len, ie, ie_len,
4471                                   key.p.key, key.p.key_len, key.idx);
4472 }
4473
4474 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4475                                    struct genl_info *info,
4476                                    struct cfg80211_crypto_settings *settings,
4477                                    int cipher_limit)
4478 {
4479         memset(settings, 0, sizeof(*settings));
4480
4481         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4482
4483         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4484                 u16 proto;
4485                 proto = nla_get_u16(
4486                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4487                 settings->control_port_ethertype = cpu_to_be16(proto);
4488                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4489                     proto != ETH_P_PAE)
4490                         return -EINVAL;
4491                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4492                         settings->control_port_no_encrypt = true;
4493         } else
4494                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4495
4496         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4497                 void *data;
4498                 int len, i;
4499
4500                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4501                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4502                 settings->n_ciphers_pairwise = len / sizeof(u32);
4503
4504                 if (len % sizeof(u32))
4505                         return -EINVAL;
4506
4507                 if (settings->n_ciphers_pairwise > cipher_limit)
4508                         return -EINVAL;
4509
4510                 memcpy(settings->ciphers_pairwise, data, len);
4511
4512                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4513                         if (!cfg80211_supported_cipher_suite(
4514                                         &rdev->wiphy,
4515                                         settings->ciphers_pairwise[i]))
4516                                 return -EINVAL;
4517         }
4518
4519         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4520                 settings->cipher_group =
4521                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4522                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4523                                                      settings->cipher_group))
4524                         return -EINVAL;
4525         }
4526
4527         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4528                 settings->wpa_versions =
4529                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4530                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4531                         return -EINVAL;
4532         }
4533
4534         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4535                 void *data;
4536                 int len;
4537
4538                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4539                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4540                 settings->n_akm_suites = len / sizeof(u32);
4541
4542                 if (len % sizeof(u32))
4543                         return -EINVAL;
4544
4545                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4546                         return -EINVAL;
4547
4548                 memcpy(settings->akm_suites, data, len);
4549         }
4550
4551         return 0;
4552 }
4553
4554 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4555 {
4556         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4557         struct net_device *dev = info->user_ptr[1];
4558         struct cfg80211_crypto_settings crypto;
4559         struct ieee80211_channel *chan;
4560         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4561         int err, ssid_len, ie_len = 0;
4562         bool use_mfp = false;
4563         u32 flags = 0;
4564         struct ieee80211_ht_cap *ht_capa = NULL;
4565         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4566
4567         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4568                 return -EINVAL;
4569
4570         if (!info->attrs[NL80211_ATTR_MAC] ||
4571             !info->attrs[NL80211_ATTR_SSID] ||
4572             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4573                 return -EINVAL;
4574
4575         if (!rdev->ops->assoc)
4576                 return -EOPNOTSUPP;
4577
4578         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4579             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4580                 return -EOPNOTSUPP;
4581
4582         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4583
4584         chan = ieee80211_get_channel(&rdev->wiphy,
4585                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4586         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4587                 return -EINVAL;
4588
4589         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4590         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4591
4592         if (info->attrs[NL80211_ATTR_IE]) {
4593                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4594                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4595         }
4596
4597         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4598                 enum nl80211_mfp mfp =
4599                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4600                 if (mfp == NL80211_MFP_REQUIRED)
4601                         use_mfp = true;
4602                 else if (mfp != NL80211_MFP_NO)
4603                         return -EINVAL;
4604         }
4605
4606         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4607                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4608
4609         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4610                 flags |= ASSOC_REQ_DISABLE_HT;
4611
4612         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4613                 ht_capa_mask =
4614                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4615
4616         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4617                 if (!ht_capa_mask)
4618                         return -EINVAL;
4619                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4620         }
4621
4622         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4623         if (!err)
4624                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4625                                           ssid, ssid_len, ie, ie_len, use_mfp,
4626                                           &crypto, flags, ht_capa,
4627                                           ht_capa_mask);
4628
4629         return err;
4630 }
4631
4632 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4633 {
4634         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4635         struct net_device *dev = info->user_ptr[1];
4636         const u8 *ie = NULL, *bssid;
4637         int ie_len = 0;
4638         u16 reason_code;
4639         bool local_state_change;
4640
4641         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4642                 return -EINVAL;
4643
4644         if (!info->attrs[NL80211_ATTR_MAC])
4645                 return -EINVAL;
4646
4647         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4648                 return -EINVAL;
4649
4650         if (!rdev->ops->deauth)
4651                 return -EOPNOTSUPP;
4652
4653         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4654             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4655                 return -EOPNOTSUPP;
4656
4657         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4658
4659         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4660         if (reason_code == 0) {
4661                 /* Reason Code 0 is reserved */
4662                 return -EINVAL;
4663         }
4664
4665         if (info->attrs[NL80211_ATTR_IE]) {
4666                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4667                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4668         }
4669
4670         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4671
4672         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4673                                     local_state_change);
4674 }
4675
4676 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4677 {
4678         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4679         struct net_device *dev = info->user_ptr[1];
4680         const u8 *ie = NULL, *bssid;
4681         int ie_len = 0;
4682         u16 reason_code;
4683         bool local_state_change;
4684
4685         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4686                 return -EINVAL;
4687
4688         if (!info->attrs[NL80211_ATTR_MAC])
4689                 return -EINVAL;
4690
4691         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4692                 return -EINVAL;
4693
4694         if (!rdev->ops->disassoc)
4695                 return -EOPNOTSUPP;
4696
4697         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4698             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4699                 return -EOPNOTSUPP;
4700
4701         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4702
4703         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4704         if (reason_code == 0) {
4705                 /* Reason Code 0 is reserved */
4706                 return -EINVAL;
4707         }
4708
4709         if (info->attrs[NL80211_ATTR_IE]) {
4710                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4711                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4712         }
4713
4714         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4715
4716         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4717                                       local_state_change);
4718 }
4719
4720 static bool
4721 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4722                          int mcast_rate[IEEE80211_NUM_BANDS],
4723                          int rateval)
4724 {
4725         struct wiphy *wiphy = &rdev->wiphy;
4726         bool found = false;
4727         int band, i;
4728
4729         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4730                 struct ieee80211_supported_band *sband;
4731
4732                 sband = wiphy->bands[band];
4733                 if (!sband)
4734                         continue;
4735
4736                 for (i = 0; i < sband->n_bitrates; i++) {
4737                         if (sband->bitrates[i].bitrate == rateval) {
4738                                 mcast_rate[band] = i + 1;
4739                                 found = true;
4740                                 break;
4741                         }
4742                 }
4743         }
4744
4745         return found;
4746 }
4747
4748 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4749 {
4750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4751         struct net_device *dev = info->user_ptr[1];
4752         struct cfg80211_ibss_params ibss;
4753         struct wiphy *wiphy;
4754         struct cfg80211_cached_keys *connkeys = NULL;
4755         int err;
4756
4757         memset(&ibss, 0, sizeof(ibss));
4758
4759         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4760                 return -EINVAL;
4761
4762         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4763             !info->attrs[NL80211_ATTR_SSID] ||
4764             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4765                 return -EINVAL;
4766
4767         ibss.beacon_interval = 100;
4768
4769         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4770                 ibss.beacon_interval =
4771                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4772                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4773                         return -EINVAL;
4774         }
4775
4776         if (!rdev->ops->join_ibss)
4777                 return -EOPNOTSUPP;
4778
4779         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4780                 return -EOPNOTSUPP;
4781
4782         wiphy = &rdev->wiphy;
4783
4784         if (info->attrs[NL80211_ATTR_MAC]) {
4785                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4786
4787                 if (!is_valid_ether_addr(ibss.bssid))
4788                         return -EINVAL;
4789         }
4790         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4791         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4792
4793         if (info->attrs[NL80211_ATTR_IE]) {
4794                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4795                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4796         }
4797
4798         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4799                 enum nl80211_channel_type channel_type;
4800
4801                 channel_type = nla_get_u32(
4802                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4803                 if (channel_type != NL80211_CHAN_NO_HT &&
4804                     channel_type != NL80211_CHAN_HT20 &&
4805                     channel_type != NL80211_CHAN_HT40MINUS &&
4806                     channel_type != NL80211_CHAN_HT40PLUS)
4807                         return -EINVAL;
4808
4809                 if (channel_type != NL80211_CHAN_NO_HT &&
4810                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
4811                         return -EINVAL;
4812
4813                 ibss.channel_type = channel_type;
4814         } else {
4815                 ibss.channel_type = NL80211_CHAN_NO_HT;
4816         }
4817
4818         ibss.channel = rdev_freq_to_chan(rdev,
4819                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
4820                 ibss.channel_type);
4821         if (!ibss.channel ||
4822             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4823             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4824                 return -EINVAL;
4825
4826         /* Both channels should be able to initiate communication */
4827         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
4828              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
4829             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
4830                                           ibss.channel_type))
4831                 return -EINVAL;
4832
4833         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4834         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4835
4836         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4837                 u8 *rates =
4838                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4839                 int n_rates =
4840                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4841                 struct ieee80211_supported_band *sband =
4842                         wiphy->bands[ibss.channel->band];
4843
4844                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4845                                              &ibss.basic_rates);
4846                 if (err)
4847                         return err;
4848         }
4849
4850         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4851             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4852                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4853                 return -EINVAL;
4854
4855         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4856                 connkeys = nl80211_parse_connkeys(rdev,
4857                                         info->attrs[NL80211_ATTR_KEYS]);
4858                 if (IS_ERR(connkeys))
4859                         return PTR_ERR(connkeys);
4860         }
4861
4862         ibss.control_port =
4863                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
4864
4865         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4866         if (err)
4867                 kfree(connkeys);
4868         return err;
4869 }
4870
4871 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4872 {
4873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4874         struct net_device *dev = info->user_ptr[1];
4875
4876         if (!rdev->ops->leave_ibss)
4877                 return -EOPNOTSUPP;
4878
4879         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4880                 return -EOPNOTSUPP;
4881
4882         return cfg80211_leave_ibss(rdev, dev, false);
4883 }
4884
4885 #ifdef CONFIG_NL80211_TESTMODE
4886 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4887         .name = "testmode",
4888 };
4889
4890 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4891 {
4892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4893         int err;
4894
4895         if (!info->attrs[NL80211_ATTR_TESTDATA])
4896                 return -EINVAL;
4897
4898         err = -EOPNOTSUPP;
4899         if (rdev->ops->testmode_cmd) {
4900                 rdev->testmode_info = info;
4901                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4902                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4903                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4904                 rdev->testmode_info = NULL;
4905         }
4906
4907         return err;
4908 }
4909
4910 static int nl80211_testmode_dump(struct sk_buff *skb,
4911                                  struct netlink_callback *cb)
4912 {
4913         struct cfg80211_registered_device *rdev;
4914         int err;
4915         long phy_idx;
4916         void *data = NULL;
4917         int data_len = 0;
4918
4919         if (cb->args[0]) {
4920                 /*
4921                  * 0 is a valid index, but not valid for args[0],
4922                  * so we need to offset by 1.
4923                  */
4924                 phy_idx = cb->args[0] - 1;
4925         } else {
4926                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4927                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4928                                   nl80211_policy);
4929                 if (err)
4930                         return err;
4931                 if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
4932                         phy_idx = nla_get_u32(
4933                                 nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4934                 } else {
4935                         struct net_device *netdev;
4936
4937                         err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
4938                                                       nl80211_fam.attrbuf,
4939                                                       &rdev, &netdev);
4940                         if (err)
4941                                 return err;
4942                         dev_put(netdev);
4943                         phy_idx = rdev->wiphy_idx;
4944                         cfg80211_unlock_rdev(rdev);
4945                 }
4946                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4947                         cb->args[1] =
4948                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4949         }
4950
4951         if (cb->args[1]) {
4952                 data = nla_data((void *)cb->args[1]);
4953                 data_len = nla_len((void *)cb->args[1]);
4954         }
4955
4956         mutex_lock(&cfg80211_mutex);
4957         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4958         if (!rdev) {
4959                 mutex_unlock(&cfg80211_mutex);
4960                 return -ENOENT;
4961         }
4962         cfg80211_lock_rdev(rdev);
4963         mutex_unlock(&cfg80211_mutex);
4964
4965         if (!rdev->ops->testmode_dump) {
4966                 err = -EOPNOTSUPP;
4967                 goto out_err;
4968         }
4969
4970         while (1) {
4971                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4972                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4973                                            NL80211_CMD_TESTMODE);
4974                 struct nlattr *tmdata;
4975
4976                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx) < 0) {
4977                         genlmsg_cancel(skb, hdr);
4978                         break;
4979                 }
4980
4981                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4982                 if (!tmdata) {
4983                         genlmsg_cancel(skb, hdr);
4984                         break;
4985                 }
4986                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
4987                                                data, data_len);
4988                 nla_nest_end(skb, tmdata);
4989
4990                 if (err == -ENOBUFS || err == -ENOENT) {
4991                         genlmsg_cancel(skb, hdr);
4992                         break;
4993                 } else if (err) {
4994                         genlmsg_cancel(skb, hdr);
4995                         goto out_err;
4996                 }
4997
4998                 genlmsg_end(skb, hdr);
4999         }
5000
5001         err = skb->len;
5002         /* see above */
5003         cb->args[0] = phy_idx + 1;
5004  out_err:
5005         cfg80211_unlock_rdev(rdev);
5006         return err;
5007 }
5008
5009 static struct sk_buff *
5010 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5011                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5012 {
5013         struct sk_buff *skb;
5014         void *hdr;
5015         struct nlattr *data;
5016
5017         skb = nlmsg_new(approxlen + 100, gfp);
5018         if (!skb)
5019                 return NULL;
5020
5021         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5022         if (!hdr) {
5023                 kfree_skb(skb);
5024                 return NULL;
5025         }
5026
5027         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5028         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5029
5030         ((void **)skb->cb)[0] = rdev;
5031         ((void **)skb->cb)[1] = hdr;
5032         ((void **)skb->cb)[2] = data;
5033
5034         return skb;
5035
5036  nla_put_failure:
5037         kfree_skb(skb);
5038         return NULL;
5039 }
5040
5041 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5042                                                   int approxlen)
5043 {
5044         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5045
5046         if (WARN_ON(!rdev->testmode_info))
5047                 return NULL;
5048
5049         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5050                                 rdev->testmode_info->snd_pid,
5051                                 rdev->testmode_info->snd_seq,
5052                                 GFP_KERNEL);
5053 }
5054 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5055
5056 int cfg80211_testmode_reply(struct sk_buff *skb)
5057 {
5058         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5059         void *hdr = ((void **)skb->cb)[1];
5060         struct nlattr *data = ((void **)skb->cb)[2];
5061
5062         if (WARN_ON(!rdev->testmode_info)) {
5063                 kfree_skb(skb);
5064                 return -EINVAL;
5065         }
5066
5067         nla_nest_end(skb, data);
5068         genlmsg_end(skb, hdr);
5069         return genlmsg_reply(skb, rdev->testmode_info);
5070 }
5071 EXPORT_SYMBOL(cfg80211_testmode_reply);
5072
5073 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5074                                                   int approxlen, gfp_t gfp)
5075 {
5076         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5077
5078         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5079 }
5080 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5081
5082 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5083 {
5084         void *hdr = ((void **)skb->cb)[1];
5085         struct nlattr *data = ((void **)skb->cb)[2];
5086
5087         nla_nest_end(skb, data);
5088         genlmsg_end(skb, hdr);
5089         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5090 }
5091 EXPORT_SYMBOL(cfg80211_testmode_event);
5092 #endif
5093
5094 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5095 {
5096         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5097         struct net_device *dev = info->user_ptr[1];
5098         struct cfg80211_connect_params connect;
5099         struct wiphy *wiphy;
5100         struct cfg80211_cached_keys *connkeys = NULL;
5101         int err;
5102
5103         memset(&connect, 0, sizeof(connect));
5104
5105         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5106                 return -EINVAL;
5107
5108         if (!info->attrs[NL80211_ATTR_SSID] ||
5109             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5110                 return -EINVAL;
5111
5112         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5113                 connect.auth_type =
5114                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5115                 if (!nl80211_valid_auth_type(connect.auth_type))
5116                         return -EINVAL;
5117         } else
5118                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5119
5120         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5121
5122         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5123                                       NL80211_MAX_NR_CIPHER_SUITES);
5124         if (err)
5125                 return err;
5126
5127         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5128             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5129                 return -EOPNOTSUPP;
5130
5131         wiphy = &rdev->wiphy;
5132
5133         connect.bg_scan_period = -1;
5134         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5135                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5136                 connect.bg_scan_period =
5137                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5138         }
5139
5140         if (info->attrs[NL80211_ATTR_MAC])
5141                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5142         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5143         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5144
5145         if (info->attrs[NL80211_ATTR_IE]) {
5146                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5147                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5148         }
5149
5150         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5151                 connect.channel =
5152                         ieee80211_get_channel(wiphy,
5153                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5154                 if (!connect.channel ||
5155                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5156                         return -EINVAL;
5157         }
5158
5159         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5160                 connkeys = nl80211_parse_connkeys(rdev,
5161                                         info->attrs[NL80211_ATTR_KEYS]);
5162                 if (IS_ERR(connkeys))
5163                         return PTR_ERR(connkeys);
5164         }
5165
5166         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5167                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5168
5169         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5170                 memcpy(&connect.ht_capa_mask,
5171                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5172                        sizeof(connect.ht_capa_mask));
5173
5174         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5175                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5176                         return -EINVAL;
5177                 memcpy(&connect.ht_capa,
5178                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5179                        sizeof(connect.ht_capa));
5180         }
5181
5182         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5183         if (err)
5184                 kfree(connkeys);
5185         return err;
5186 }
5187
5188 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5189 {
5190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5191         struct net_device *dev = info->user_ptr[1];
5192         u16 reason;
5193
5194         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5195                 reason = WLAN_REASON_DEAUTH_LEAVING;
5196         else
5197                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5198
5199         if (reason == 0)
5200                 return -EINVAL;
5201
5202         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5203             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5204                 return -EOPNOTSUPP;
5205
5206         return cfg80211_disconnect(rdev, dev, reason, true);
5207 }
5208
5209 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5210 {
5211         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5212         struct net *net;
5213         int err;
5214         u32 pid;
5215
5216         if (!info->attrs[NL80211_ATTR_PID])
5217                 return -EINVAL;
5218
5219         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5220
5221         net = get_net_ns_by_pid(pid);
5222         if (IS_ERR(net))
5223                 return PTR_ERR(net);
5224
5225         err = 0;
5226
5227         /* check if anything to do */
5228         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5229                 err = cfg80211_switch_netns(rdev, net);
5230
5231         put_net(net);
5232         return err;
5233 }
5234
5235 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5236 {
5237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5238         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5239                         struct cfg80211_pmksa *pmksa) = NULL;
5240         struct net_device *dev = info->user_ptr[1];
5241         struct cfg80211_pmksa pmksa;
5242
5243         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5244
5245         if (!info->attrs[NL80211_ATTR_MAC])
5246                 return -EINVAL;
5247
5248         if (!info->attrs[NL80211_ATTR_PMKID])
5249                 return -EINVAL;
5250
5251         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5252         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5253
5254         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5255             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5256                 return -EOPNOTSUPP;
5257
5258         switch (info->genlhdr->cmd) {
5259         case NL80211_CMD_SET_PMKSA:
5260                 rdev_ops = rdev->ops->set_pmksa;
5261                 break;
5262         case NL80211_CMD_DEL_PMKSA:
5263                 rdev_ops = rdev->ops->del_pmksa;
5264                 break;
5265         default:
5266                 WARN_ON(1);
5267                 break;
5268         }
5269
5270         if (!rdev_ops)
5271                 return -EOPNOTSUPP;
5272
5273         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5274 }
5275
5276 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5277 {
5278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5279         struct net_device *dev = info->user_ptr[1];
5280
5281         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5282             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5283                 return -EOPNOTSUPP;
5284
5285         if (!rdev->ops->flush_pmksa)
5286                 return -EOPNOTSUPP;
5287
5288         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5289 }
5290
5291 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5292 {
5293         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5294         struct net_device *dev = info->user_ptr[1];
5295         u8 action_code, dialog_token;
5296         u16 status_code;
5297         u8 *peer;
5298
5299         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5300             !rdev->ops->tdls_mgmt)
5301                 return -EOPNOTSUPP;
5302
5303         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5304             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5305             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5306             !info->attrs[NL80211_ATTR_IE] ||
5307             !info->attrs[NL80211_ATTR_MAC])
5308                 return -EINVAL;
5309
5310         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5311         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5312         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5313         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5314
5315         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5316                                     dialog_token, status_code,
5317                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5318                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5319 }
5320
5321 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5322 {
5323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5324         struct net_device *dev = info->user_ptr[1];
5325         enum nl80211_tdls_operation operation;
5326         u8 *peer;
5327
5328         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5329             !rdev->ops->tdls_oper)
5330                 return -EOPNOTSUPP;
5331
5332         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5333             !info->attrs[NL80211_ATTR_MAC])
5334                 return -EINVAL;
5335
5336         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5337         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5338
5339         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5340 }
5341
5342 static int nl80211_remain_on_channel(struct sk_buff *skb,
5343                                      struct genl_info *info)
5344 {
5345         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5346         struct net_device *dev = info->user_ptr[1];
5347         struct ieee80211_channel *chan;
5348         struct sk_buff *msg;
5349         void *hdr;
5350         u64 cookie;
5351         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5352         u32 freq, duration;
5353         int err;
5354
5355         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5356             !info->attrs[NL80211_ATTR_DURATION])
5357                 return -EINVAL;
5358
5359         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5360
5361         /*
5362          * We should be on that channel for at least one jiffie,
5363          * and more than 5 seconds seems excessive.
5364          */
5365         if (!duration || !msecs_to_jiffies(duration) ||
5366             duration > rdev->wiphy.max_remain_on_channel_duration)
5367                 return -EINVAL;
5368
5369         if (!rdev->ops->remain_on_channel ||
5370             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5371                 return -EOPNOTSUPP;
5372
5373         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5374                 channel_type = nla_get_u32(
5375                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5376                 if (channel_type != NL80211_CHAN_NO_HT &&
5377                     channel_type != NL80211_CHAN_HT20 &&
5378                     channel_type != NL80211_CHAN_HT40PLUS &&
5379                     channel_type != NL80211_CHAN_HT40MINUS)
5380                         return -EINVAL;
5381         }
5382
5383         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5384         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5385         if (chan == NULL)
5386                 return -EINVAL;
5387
5388         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5389         if (!msg)
5390                 return -ENOMEM;
5391
5392         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5393                              NL80211_CMD_REMAIN_ON_CHANNEL);
5394
5395         if (IS_ERR(hdr)) {
5396                 err = PTR_ERR(hdr);
5397                 goto free_msg;
5398         }
5399
5400         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5401                                            channel_type, duration, &cookie);
5402
5403         if (err)
5404                 goto free_msg;
5405
5406         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5407
5408         genlmsg_end(msg, hdr);
5409
5410         return genlmsg_reply(msg, info);
5411
5412  nla_put_failure:
5413         err = -ENOBUFS;
5414  free_msg:
5415         nlmsg_free(msg);
5416         return err;
5417 }
5418
5419 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5420                                             struct genl_info *info)
5421 {
5422         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5423         struct net_device *dev = info->user_ptr[1];
5424         u64 cookie;
5425
5426         if (!info->attrs[NL80211_ATTR_COOKIE])
5427                 return -EINVAL;
5428
5429         if (!rdev->ops->cancel_remain_on_channel)
5430                 return -EOPNOTSUPP;
5431
5432         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5433
5434         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5435 }
5436
5437 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5438                            u8 *rates, u8 rates_len)
5439 {
5440         u8 i;
5441         u32 mask = 0;
5442
5443         for (i = 0; i < rates_len; i++) {
5444                 int rate = (rates[i] & 0x7f) * 5;
5445                 int ridx;
5446                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5447                         struct ieee80211_rate *srate =
5448                                 &sband->bitrates[ridx];
5449                         if (rate == srate->bitrate) {
5450                                 mask |= 1 << ridx;
5451                                 break;
5452                         }
5453                 }
5454                 if (ridx == sband->n_bitrates)
5455                         return 0; /* rate not found */
5456         }
5457
5458         return mask;
5459 }
5460
5461 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5462                                u8 *rates, u8 rates_len,
5463                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5464 {
5465         u8 i;
5466
5467         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5468
5469         for (i = 0; i < rates_len; i++) {
5470                 int ridx, rbit;
5471
5472                 ridx = rates[i] / 8;
5473                 rbit = BIT(rates[i] % 8);
5474
5475                 /* check validity */
5476                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5477                         return false;
5478
5479                 /* check availability */
5480                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5481                         mcs[ridx] |= rbit;
5482                 else
5483                         return false;
5484         }
5485
5486         return true;
5487 }
5488
5489 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5490         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5491                                     .len = NL80211_MAX_SUPP_RATES },
5492         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5493                                  .len = NL80211_MAX_SUPP_HT_RATES },
5494 };
5495
5496 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5497                                        struct genl_info *info)
5498 {
5499         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5500         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5501         struct cfg80211_bitrate_mask mask;
5502         int rem, i;
5503         struct net_device *dev = info->user_ptr[1];
5504         struct nlattr *tx_rates;
5505         struct ieee80211_supported_band *sband;
5506
5507         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5508                 return -EINVAL;
5509
5510         if (!rdev->ops->set_bitrate_mask)
5511                 return -EOPNOTSUPP;
5512
5513         memset(&mask, 0, sizeof(mask));
5514         /* Default to all rates enabled */
5515         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5516                 sband = rdev->wiphy.bands[i];
5517                 mask.control[i].legacy =
5518                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5519                 if (sband)
5520                         memcpy(mask.control[i].mcs,
5521                                sband->ht_cap.mcs.rx_mask,
5522                                sizeof(mask.control[i].mcs));
5523                 else
5524                         memset(mask.control[i].mcs, 0,
5525                                sizeof(mask.control[i].mcs));
5526         }
5527
5528         /*
5529          * The nested attribute uses enum nl80211_band as the index. This maps
5530          * directly to the enum ieee80211_band values used in cfg80211.
5531          */
5532         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5533         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5534         {
5535                 enum ieee80211_band band = nla_type(tx_rates);
5536                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5537                         return -EINVAL;
5538                 sband = rdev->wiphy.bands[band];
5539                 if (sband == NULL)
5540                         return -EINVAL;
5541                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5542                           nla_len(tx_rates), nl80211_txattr_policy);
5543                 if (tb[NL80211_TXRATE_LEGACY]) {
5544                         mask.control[band].legacy = rateset_to_mask(
5545                                 sband,
5546                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5547                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5548                 }
5549                 if (tb[NL80211_TXRATE_MCS]) {
5550                         if (!ht_rateset_to_mask(
5551                                         sband,
5552                                         nla_data(tb[NL80211_TXRATE_MCS]),
5553                                         nla_len(tb[NL80211_TXRATE_MCS]),
5554                                         mask.control[band].mcs))
5555                                 return -EINVAL;
5556                 }
5557
5558                 if (mask.control[band].legacy == 0) {
5559                         /* don't allow empty legacy rates if HT
5560                          * is not even supported. */
5561                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5562                                 return -EINVAL;
5563
5564                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5565                                 if (mask.control[band].mcs[i])
5566                                         break;
5567
5568                         /* legacy and mcs rates may not be both empty */
5569                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5570                                 return -EINVAL;
5571                 }
5572         }
5573
5574         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5575 }
5576
5577 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5578 {
5579         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5580         struct net_device *dev = info->user_ptr[1];
5581         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5582
5583         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5584                 return -EINVAL;
5585
5586         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5587                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5588
5589         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5590             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5591             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5592             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5593             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5594             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5595             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5596                 return -EOPNOTSUPP;
5597
5598         /* not much point in registering if we can't reply */
5599         if (!rdev->ops->mgmt_tx)
5600                 return -EOPNOTSUPP;
5601
5602         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5603                         frame_type,
5604                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5605                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5606 }
5607
5608 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5609 {
5610         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5611         struct net_device *dev = info->user_ptr[1];
5612         struct ieee80211_channel *chan;
5613         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5614         bool channel_type_valid = false;
5615         u32 freq;
5616         int err;
5617         void *hdr = NULL;
5618         u64 cookie;
5619         struct sk_buff *msg = NULL;
5620         unsigned int wait = 0;
5621         bool offchan, no_cck, dont_wait_for_ack;
5622
5623         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5624
5625         if (!info->attrs[NL80211_ATTR_FRAME] ||
5626             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5627                 return -EINVAL;
5628
5629         if (!rdev->ops->mgmt_tx)
5630                 return -EOPNOTSUPP;
5631
5632         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5633             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5634             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5635             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5636             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5637             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5638             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5639                 return -EOPNOTSUPP;
5640
5641         if (info->attrs[NL80211_ATTR_DURATION]) {
5642                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5643                         return -EINVAL;
5644                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5645         }
5646
5647         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5648                 channel_type = nla_get_u32(
5649                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5650                 if (channel_type != NL80211_CHAN_NO_HT &&
5651                     channel_type != NL80211_CHAN_HT20 &&
5652                     channel_type != NL80211_CHAN_HT40PLUS &&
5653                     channel_type != NL80211_CHAN_HT40MINUS)
5654                         return -EINVAL;
5655                 channel_type_valid = true;
5656         }
5657
5658         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5659
5660         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5661                 return -EINVAL;
5662
5663         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5664
5665         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5666         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5667         if (chan == NULL)
5668                 return -EINVAL;
5669
5670         if (!dont_wait_for_ack) {
5671                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5672                 if (!msg)
5673                         return -ENOMEM;
5674
5675                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5676                                      NL80211_CMD_FRAME);
5677
5678                 if (IS_ERR(hdr)) {
5679                         err = PTR_ERR(hdr);
5680                         goto free_msg;
5681                 }
5682         }
5683
5684         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5685                                     channel_type_valid, wait,
5686                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5687                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5688                                     no_cck, dont_wait_for_ack, &cookie);
5689         if (err)
5690                 goto free_msg;
5691
5692         if (msg) {
5693                 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5694
5695                 genlmsg_end(msg, hdr);
5696                 return genlmsg_reply(msg, info);
5697         }
5698
5699         return 0;
5700
5701  nla_put_failure:
5702         err = -ENOBUFS;
5703  free_msg:
5704         nlmsg_free(msg);
5705         return err;
5706 }
5707
5708 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5709 {
5710         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5711         struct net_device *dev = info->user_ptr[1];
5712         u64 cookie;
5713
5714         if (!info->attrs[NL80211_ATTR_COOKIE])
5715                 return -EINVAL;
5716
5717         if (!rdev->ops->mgmt_tx_cancel_wait)
5718                 return -EOPNOTSUPP;
5719
5720         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5721             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5722             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5723             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5724             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5725             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5726                 return -EOPNOTSUPP;
5727
5728         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5729
5730         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5731 }
5732
5733 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5734 {
5735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5736         struct wireless_dev *wdev;
5737         struct net_device *dev = info->user_ptr[1];
5738         u8 ps_state;
5739         bool state;
5740         int err;
5741
5742         if (!info->attrs[NL80211_ATTR_PS_STATE])
5743                 return -EINVAL;
5744
5745         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5746
5747         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5748                 return -EINVAL;
5749
5750         wdev = dev->ieee80211_ptr;
5751
5752         if (!rdev->ops->set_power_mgmt)
5753                 return -EOPNOTSUPP;
5754
5755         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5756
5757         if (state == wdev->ps)
5758                 return 0;
5759
5760         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5761                                         wdev->ps_timeout);
5762         if (!err)
5763                 wdev->ps = state;
5764         return err;
5765 }
5766
5767 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5768 {
5769         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5770         enum nl80211_ps_state ps_state;
5771         struct wireless_dev *wdev;
5772         struct net_device *dev = info->user_ptr[1];
5773         struct sk_buff *msg;
5774         void *hdr;
5775         int err;
5776
5777         wdev = dev->ieee80211_ptr;
5778
5779         if (!rdev->ops->set_power_mgmt)
5780                 return -EOPNOTSUPP;
5781
5782         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5783         if (!msg)
5784                 return -ENOMEM;
5785
5786         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5787                              NL80211_CMD_GET_POWER_SAVE);
5788         if (!hdr) {
5789                 err = -ENOBUFS;
5790                 goto free_msg;
5791         }
5792
5793         if (wdev->ps)
5794                 ps_state = NL80211_PS_ENABLED;
5795         else
5796                 ps_state = NL80211_PS_DISABLED;
5797
5798         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5799
5800         genlmsg_end(msg, hdr);
5801         return genlmsg_reply(msg, info);
5802
5803  nla_put_failure:
5804         err = -ENOBUFS;
5805  free_msg:
5806         nlmsg_free(msg);
5807         return err;
5808 }
5809
5810 static struct nla_policy
5811 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5812         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5813         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5814         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5815 };
5816
5817 static int nl80211_set_cqm_rssi(struct genl_info *info,
5818                                 s32 threshold, u32 hysteresis)
5819 {
5820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5821         struct wireless_dev *wdev;
5822         struct net_device *dev = info->user_ptr[1];
5823
5824         if (threshold > 0)
5825                 return -EINVAL;
5826
5827         wdev = dev->ieee80211_ptr;
5828
5829         if (!rdev->ops->set_cqm_rssi_config)
5830                 return -EOPNOTSUPP;
5831
5832         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5833             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5834                 return -EOPNOTSUPP;
5835
5836         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5837                                               threshold, hysteresis);
5838 }
5839
5840 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5841 {
5842         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5843         struct nlattr *cqm;
5844         int err;
5845
5846         cqm = info->attrs[NL80211_ATTR_CQM];
5847         if (!cqm) {
5848                 err = -EINVAL;
5849                 goto out;
5850         }
5851
5852         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5853                                nl80211_attr_cqm_policy);
5854         if (err)
5855                 goto out;
5856
5857         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5858             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5859                 s32 threshold;
5860                 u32 hysteresis;
5861                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5862                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5863                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5864         } else
5865                 err = -EINVAL;
5866
5867 out:
5868         return err;
5869 }
5870
5871 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5872 {
5873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5874         struct net_device *dev = info->user_ptr[1];
5875         struct mesh_config cfg;
5876         struct mesh_setup setup;
5877         int err;
5878
5879         /* start with default */
5880         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5881         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5882
5883         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5884                 /* and parse parameters if given */
5885                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5886                 if (err)
5887                         return err;
5888         }
5889
5890         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5891             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5892                 return -EINVAL;
5893
5894         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5895         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5896
5897         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5898             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
5899                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5900                         return -EINVAL;
5901
5902         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5903                 /* parse additional setup parameters if given */
5904                 err = nl80211_parse_mesh_setup(info, &setup);
5905                 if (err)
5906                         return err;
5907         }
5908
5909         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5910 }
5911
5912 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5913 {
5914         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5915         struct net_device *dev = info->user_ptr[1];
5916
5917         return cfg80211_leave_mesh(rdev, dev);
5918 }
5919
5920 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5921 {
5922         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5923         struct sk_buff *msg;
5924         void *hdr;
5925
5926         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5927                 return -EOPNOTSUPP;
5928
5929         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5930         if (!msg)
5931                 return -ENOMEM;
5932
5933         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5934                              NL80211_CMD_GET_WOWLAN);
5935         if (!hdr)
5936                 goto nla_put_failure;
5937
5938         if (rdev->wowlan) {
5939                 struct nlattr *nl_wowlan;
5940
5941                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5942                 if (!nl_wowlan)
5943                         goto nla_put_failure;
5944
5945                 if (rdev->wowlan->any)
5946                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5947                 if (rdev->wowlan->disconnect)
5948                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5949                 if (rdev->wowlan->magic_pkt)
5950                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5951                 if (rdev->wowlan->gtk_rekey_failure)
5952                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5953                 if (rdev->wowlan->eap_identity_req)
5954                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
5955                 if (rdev->wowlan->four_way_handshake)
5956                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
5957                 if (rdev->wowlan->rfkill_release)
5958                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
5959                 if (rdev->wowlan->n_patterns) {
5960                         struct nlattr *nl_pats, *nl_pat;
5961                         int i, pat_len;
5962
5963                         nl_pats = nla_nest_start(msg,
5964                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5965                         if (!nl_pats)
5966                                 goto nla_put_failure;
5967
5968                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5969                                 nl_pat = nla_nest_start(msg, i + 1);
5970                                 if (!nl_pat)
5971                                         goto nla_put_failure;
5972                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5973                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5974                                         DIV_ROUND_UP(pat_len, 8),
5975                                         rdev->wowlan->patterns[i].mask);
5976                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5977                                         pat_len,
5978                                         rdev->wowlan->patterns[i].pattern);
5979                                 nla_nest_end(msg, nl_pat);
5980                         }
5981                         nla_nest_end(msg, nl_pats);
5982                 }
5983
5984                 nla_nest_end(msg, nl_wowlan);
5985         }
5986
5987         genlmsg_end(msg, hdr);
5988         return genlmsg_reply(msg, info);
5989
5990 nla_put_failure:
5991         nlmsg_free(msg);
5992         return -ENOBUFS;
5993 }
5994
5995 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5996 {
5997         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5998         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5999         struct cfg80211_wowlan no_triggers = {};
6000         struct cfg80211_wowlan new_triggers = {};
6001         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6002         int err, i;
6003
6004         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6005                 return -EOPNOTSUPP;
6006
6007         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6008                 goto no_triggers;
6009
6010         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6011                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6012                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6013                         nl80211_wowlan_policy);
6014         if (err)
6015                 return err;
6016
6017         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6018                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6019                         return -EINVAL;
6020                 new_triggers.any = true;
6021         }
6022
6023         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6024                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6025                         return -EINVAL;
6026                 new_triggers.disconnect = true;
6027         }
6028
6029         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6030                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6031                         return -EINVAL;
6032                 new_triggers.magic_pkt = true;
6033         }
6034
6035         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6036                 return -EINVAL;
6037
6038         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6039                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6040                         return -EINVAL;
6041                 new_triggers.gtk_rekey_failure = true;
6042         }
6043
6044         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6045                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6046                         return -EINVAL;
6047                 new_triggers.eap_identity_req = true;
6048         }
6049
6050         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6051                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6052                         return -EINVAL;
6053                 new_triggers.four_way_handshake = true;
6054         }
6055
6056         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6057                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6058                         return -EINVAL;
6059                 new_triggers.rfkill_release = true;
6060         }
6061
6062         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6063                 struct nlattr *pat;
6064                 int n_patterns = 0;
6065                 int rem, pat_len, mask_len;
6066                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6067
6068                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6069                                     rem)
6070                         n_patterns++;
6071                 if (n_patterns > wowlan->n_patterns)
6072                         return -EINVAL;
6073
6074                 new_triggers.patterns = kcalloc(n_patterns,
6075                                                 sizeof(new_triggers.patterns[0]),
6076                                                 GFP_KERNEL);
6077                 if (!new_triggers.patterns)
6078                         return -ENOMEM;
6079
6080                 new_triggers.n_patterns = n_patterns;
6081                 i = 0;
6082
6083                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6084                                     rem) {
6085                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6086                                   nla_data(pat), nla_len(pat), NULL);
6087                         err = -EINVAL;
6088                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6089                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6090                                 goto error;
6091                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6092                         mask_len = DIV_ROUND_UP(pat_len, 8);
6093                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6094                             mask_len)
6095                                 goto error;
6096                         if (pat_len > wowlan->pattern_max_len ||
6097                             pat_len < wowlan->pattern_min_len)
6098                                 goto error;
6099
6100                         new_triggers.patterns[i].mask =
6101                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6102                         if (!new_triggers.patterns[i].mask) {
6103                                 err = -ENOMEM;
6104                                 goto error;
6105                         }
6106                         new_triggers.patterns[i].pattern =
6107                                 new_triggers.patterns[i].mask + mask_len;
6108                         memcpy(new_triggers.patterns[i].mask,
6109                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6110                                mask_len);
6111                         new_triggers.patterns[i].pattern_len = pat_len;
6112                         memcpy(new_triggers.patterns[i].pattern,
6113                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6114                                pat_len);
6115                         i++;
6116                 }
6117         }
6118
6119         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6120                 struct cfg80211_wowlan *ntrig;
6121                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6122                                 GFP_KERNEL);
6123                 if (!ntrig) {
6124                         err = -ENOMEM;
6125                         goto error;
6126                 }
6127                 cfg80211_rdev_free_wowlan(rdev);
6128                 rdev->wowlan = ntrig;
6129         } else {
6130  no_triggers:
6131                 cfg80211_rdev_free_wowlan(rdev);
6132                 rdev->wowlan = NULL;
6133         }
6134
6135         return 0;
6136  error:
6137         for (i = 0; i < new_triggers.n_patterns; i++)
6138                 kfree(new_triggers.patterns[i].mask);
6139         kfree(new_triggers.patterns);
6140         return err;
6141 }
6142
6143 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6144 {
6145         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6146         struct net_device *dev = info->user_ptr[1];
6147         struct wireless_dev *wdev = dev->ieee80211_ptr;
6148         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6149         struct cfg80211_gtk_rekey_data rekey_data;
6150         int err;
6151
6152         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6153                 return -EINVAL;
6154
6155         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6156                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6157                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6158                         nl80211_rekey_policy);
6159         if (err)
6160                 return err;
6161
6162         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6163                 return -ERANGE;
6164         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6165                 return -ERANGE;
6166         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6167                 return -ERANGE;
6168
6169         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6170                NL80211_KEK_LEN);
6171         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6172                NL80211_KCK_LEN);
6173         memcpy(rekey_data.replay_ctr,
6174                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6175                NL80211_REPLAY_CTR_LEN);
6176
6177         wdev_lock(wdev);
6178         if (!wdev->current_bss) {
6179                 err = -ENOTCONN;
6180                 goto out;
6181         }
6182
6183         if (!rdev->ops->set_rekey_data) {
6184                 err = -EOPNOTSUPP;
6185                 goto out;
6186         }
6187
6188         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6189  out:
6190         wdev_unlock(wdev);
6191         return err;
6192 }
6193
6194 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6195                                              struct genl_info *info)
6196 {
6197         struct net_device *dev = info->user_ptr[1];
6198         struct wireless_dev *wdev = dev->ieee80211_ptr;
6199
6200         if (wdev->iftype != NL80211_IFTYPE_AP &&
6201             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6202                 return -EINVAL;
6203
6204         if (wdev->ap_unexpected_nlpid)
6205                 return -EBUSY;
6206
6207         wdev->ap_unexpected_nlpid = info->snd_pid;
6208         return 0;
6209 }
6210
6211 static int nl80211_probe_client(struct sk_buff *skb,
6212                                 struct genl_info *info)
6213 {
6214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6215         struct net_device *dev = info->user_ptr[1];
6216         struct wireless_dev *wdev = dev->ieee80211_ptr;
6217         struct sk_buff *msg;
6218         void *hdr;
6219         const u8 *addr;
6220         u64 cookie;
6221         int err;
6222
6223         if (wdev->iftype != NL80211_IFTYPE_AP &&
6224             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6225                 return -EOPNOTSUPP;
6226
6227         if (!info->attrs[NL80211_ATTR_MAC])
6228                 return -EINVAL;
6229
6230         if (!rdev->ops->probe_client)
6231                 return -EOPNOTSUPP;
6232
6233         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6234         if (!msg)
6235                 return -ENOMEM;
6236
6237         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6238                              NL80211_CMD_PROBE_CLIENT);
6239
6240         if (IS_ERR(hdr)) {
6241                 err = PTR_ERR(hdr);
6242                 goto free_msg;
6243         }
6244
6245         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6246
6247         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6248         if (err)
6249                 goto free_msg;
6250
6251         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6252
6253         genlmsg_end(msg, hdr);
6254
6255         return genlmsg_reply(msg, info);
6256
6257  nla_put_failure:
6258         err = -ENOBUFS;
6259  free_msg:
6260         nlmsg_free(msg);
6261         return err;
6262 }
6263
6264 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6265 {
6266         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6267
6268         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6269                 return -EOPNOTSUPP;
6270
6271         if (rdev->ap_beacons_nlpid)
6272                 return -EBUSY;
6273
6274         rdev->ap_beacons_nlpid = info->snd_pid;
6275
6276         return 0;
6277 }
6278
6279 #define NL80211_FLAG_NEED_WIPHY         0x01
6280 #define NL80211_FLAG_NEED_NETDEV        0x02
6281 #define NL80211_FLAG_NEED_RTNL          0x04
6282 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6283 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6284                                          NL80211_FLAG_CHECK_NETDEV_UP)
6285
6286 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6287                             struct genl_info *info)
6288 {
6289         struct cfg80211_registered_device *rdev;
6290         struct net_device *dev;
6291         int err;
6292         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6293
6294         if (rtnl)
6295                 rtnl_lock();
6296
6297         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6298                 rdev = cfg80211_get_dev_from_info(info);
6299                 if (IS_ERR(rdev)) {
6300                         if (rtnl)
6301                                 rtnl_unlock();
6302                         return PTR_ERR(rdev);
6303                 }
6304                 info->user_ptr[0] = rdev;
6305         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6306                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6307                                               &rdev, &dev);
6308                 if (err) {
6309                         if (rtnl)
6310                                 rtnl_unlock();
6311                         return err;
6312                 }
6313                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6314                     !netif_running(dev)) {
6315                         cfg80211_unlock_rdev(rdev);
6316                         dev_put(dev);
6317                         if (rtnl)
6318                                 rtnl_unlock();
6319                         return -ENETDOWN;
6320                 }
6321                 info->user_ptr[0] = rdev;
6322                 info->user_ptr[1] = dev;
6323         }
6324
6325         return 0;
6326 }
6327
6328 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6329                               struct genl_info *info)
6330 {
6331         if (info->user_ptr[0])
6332                 cfg80211_unlock_rdev(info->user_ptr[0]);
6333         if (info->user_ptr[1])
6334                 dev_put(info->user_ptr[1]);
6335         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6336                 rtnl_unlock();
6337 }
6338
6339 static struct genl_ops nl80211_ops[] = {
6340         {
6341                 .cmd = NL80211_CMD_GET_WIPHY,
6342                 .doit = nl80211_get_wiphy,
6343                 .dumpit = nl80211_dump_wiphy,
6344                 .policy = nl80211_policy,
6345                 /* can be retrieved by unprivileged users */
6346                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6347         },
6348         {
6349                 .cmd = NL80211_CMD_SET_WIPHY,
6350                 .doit = nl80211_set_wiphy,
6351                 .policy = nl80211_policy,
6352                 .flags = GENL_ADMIN_PERM,
6353                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6354         },
6355         {
6356                 .cmd = NL80211_CMD_GET_INTERFACE,
6357                 .doit = nl80211_get_interface,
6358                 .dumpit = nl80211_dump_interface,
6359                 .policy = nl80211_policy,
6360                 /* can be retrieved by unprivileged users */
6361                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6362         },
6363         {
6364                 .cmd = NL80211_CMD_SET_INTERFACE,
6365                 .doit = nl80211_set_interface,
6366                 .policy = nl80211_policy,
6367                 .flags = GENL_ADMIN_PERM,
6368                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6369                                   NL80211_FLAG_NEED_RTNL,
6370         },
6371         {
6372                 .cmd = NL80211_CMD_NEW_INTERFACE,
6373                 .doit = nl80211_new_interface,
6374                 .policy = nl80211_policy,
6375                 .flags = GENL_ADMIN_PERM,
6376                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6377                                   NL80211_FLAG_NEED_RTNL,
6378         },
6379         {
6380                 .cmd = NL80211_CMD_DEL_INTERFACE,
6381                 .doit = nl80211_del_interface,
6382                 .policy = nl80211_policy,
6383                 .flags = GENL_ADMIN_PERM,
6384                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6385                                   NL80211_FLAG_NEED_RTNL,
6386         },
6387         {
6388                 .cmd = NL80211_CMD_GET_KEY,
6389                 .doit = nl80211_get_key,
6390                 .policy = nl80211_policy,
6391                 .flags = GENL_ADMIN_PERM,
6392                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6393                                   NL80211_FLAG_NEED_RTNL,
6394         },
6395         {
6396                 .cmd = NL80211_CMD_SET_KEY,
6397                 .doit = nl80211_set_key,
6398                 .policy = nl80211_policy,
6399                 .flags = GENL_ADMIN_PERM,
6400                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6401                                   NL80211_FLAG_NEED_RTNL,
6402         },
6403         {
6404                 .cmd = NL80211_CMD_NEW_KEY,
6405                 .doit = nl80211_new_key,
6406                 .policy = nl80211_policy,
6407                 .flags = GENL_ADMIN_PERM,
6408                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6409                                   NL80211_FLAG_NEED_RTNL,
6410         },
6411         {
6412                 .cmd = NL80211_CMD_DEL_KEY,
6413                 .doit = nl80211_del_key,
6414                 .policy = nl80211_policy,
6415                 .flags = GENL_ADMIN_PERM,
6416                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6417                                   NL80211_FLAG_NEED_RTNL,
6418         },
6419         {
6420                 .cmd = NL80211_CMD_SET_BEACON,
6421                 .policy = nl80211_policy,
6422                 .flags = GENL_ADMIN_PERM,
6423                 .doit = nl80211_set_beacon,
6424                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6425                                   NL80211_FLAG_NEED_RTNL,
6426         },
6427         {
6428                 .cmd = NL80211_CMD_START_AP,
6429                 .policy = nl80211_policy,
6430                 .flags = GENL_ADMIN_PERM,
6431                 .doit = nl80211_start_ap,
6432                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6433                                   NL80211_FLAG_NEED_RTNL,
6434         },
6435         {
6436                 .cmd = NL80211_CMD_STOP_AP,
6437                 .policy = nl80211_policy,
6438                 .flags = GENL_ADMIN_PERM,
6439                 .doit = nl80211_stop_ap,
6440                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6441                                   NL80211_FLAG_NEED_RTNL,
6442         },
6443         {
6444                 .cmd = NL80211_CMD_GET_STATION,
6445                 .doit = nl80211_get_station,
6446                 .dumpit = nl80211_dump_station,
6447                 .policy = nl80211_policy,
6448                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6449                                   NL80211_FLAG_NEED_RTNL,
6450         },
6451         {
6452                 .cmd = NL80211_CMD_SET_STATION,
6453                 .doit = nl80211_set_station,
6454                 .policy = nl80211_policy,
6455                 .flags = GENL_ADMIN_PERM,
6456                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6457                                   NL80211_FLAG_NEED_RTNL,
6458         },
6459         {
6460                 .cmd = NL80211_CMD_NEW_STATION,
6461                 .doit = nl80211_new_station,
6462                 .policy = nl80211_policy,
6463                 .flags = GENL_ADMIN_PERM,
6464                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6465                                   NL80211_FLAG_NEED_RTNL,
6466         },
6467         {
6468                 .cmd = NL80211_CMD_DEL_STATION,
6469                 .doit = nl80211_del_station,
6470                 .policy = nl80211_policy,
6471                 .flags = GENL_ADMIN_PERM,
6472                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6473                                   NL80211_FLAG_NEED_RTNL,
6474         },
6475         {
6476                 .cmd = NL80211_CMD_GET_MPATH,
6477                 .doit = nl80211_get_mpath,
6478                 .dumpit = nl80211_dump_mpath,
6479                 .policy = nl80211_policy,
6480                 .flags = GENL_ADMIN_PERM,
6481                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6482                                   NL80211_FLAG_NEED_RTNL,
6483         },
6484         {
6485                 .cmd = NL80211_CMD_SET_MPATH,
6486                 .doit = nl80211_set_mpath,
6487                 .policy = nl80211_policy,
6488                 .flags = GENL_ADMIN_PERM,
6489                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6490                                   NL80211_FLAG_NEED_RTNL,
6491         },
6492         {
6493                 .cmd = NL80211_CMD_NEW_MPATH,
6494                 .doit = nl80211_new_mpath,
6495                 .policy = nl80211_policy,
6496                 .flags = GENL_ADMIN_PERM,
6497                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6498                                   NL80211_FLAG_NEED_RTNL,
6499         },
6500         {
6501                 .cmd = NL80211_CMD_DEL_MPATH,
6502                 .doit = nl80211_del_mpath,
6503                 .policy = nl80211_policy,
6504                 .flags = GENL_ADMIN_PERM,
6505                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6506                                   NL80211_FLAG_NEED_RTNL,
6507         },
6508         {
6509                 .cmd = NL80211_CMD_SET_BSS,
6510                 .doit = nl80211_set_bss,
6511                 .policy = nl80211_policy,
6512                 .flags = GENL_ADMIN_PERM,
6513                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6514                                   NL80211_FLAG_NEED_RTNL,
6515         },
6516         {
6517                 .cmd = NL80211_CMD_GET_REG,
6518                 .doit = nl80211_get_reg,
6519                 .policy = nl80211_policy,
6520                 /* can be retrieved by unprivileged users */
6521         },
6522         {
6523                 .cmd = NL80211_CMD_SET_REG,
6524                 .doit = nl80211_set_reg,
6525                 .policy = nl80211_policy,
6526                 .flags = GENL_ADMIN_PERM,
6527         },
6528         {
6529                 .cmd = NL80211_CMD_REQ_SET_REG,
6530                 .doit = nl80211_req_set_reg,
6531                 .policy = nl80211_policy,
6532                 .flags = GENL_ADMIN_PERM,
6533         },
6534         {
6535                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6536                 .doit = nl80211_get_mesh_config,
6537                 .policy = nl80211_policy,
6538                 /* can be retrieved by unprivileged users */
6539                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6540                                   NL80211_FLAG_NEED_RTNL,
6541         },
6542         {
6543                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6544                 .doit = nl80211_update_mesh_config,
6545                 .policy = nl80211_policy,
6546                 .flags = GENL_ADMIN_PERM,
6547                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6548                                   NL80211_FLAG_NEED_RTNL,
6549         },
6550         {
6551                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6552                 .doit = nl80211_trigger_scan,
6553                 .policy = nl80211_policy,
6554                 .flags = GENL_ADMIN_PERM,
6555                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6556                                   NL80211_FLAG_NEED_RTNL,
6557         },
6558         {
6559                 .cmd = NL80211_CMD_GET_SCAN,
6560                 .policy = nl80211_policy,
6561                 .dumpit = nl80211_dump_scan,
6562         },
6563         {
6564                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6565                 .doit = nl80211_start_sched_scan,
6566                 .policy = nl80211_policy,
6567                 .flags = GENL_ADMIN_PERM,
6568                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6569                                   NL80211_FLAG_NEED_RTNL,
6570         },
6571         {
6572                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6573                 .doit = nl80211_stop_sched_scan,
6574                 .policy = nl80211_policy,
6575                 .flags = GENL_ADMIN_PERM,
6576                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6577                                   NL80211_FLAG_NEED_RTNL,
6578         },
6579         {
6580                 .cmd = NL80211_CMD_AUTHENTICATE,
6581                 .doit = nl80211_authenticate,
6582                 .policy = nl80211_policy,
6583                 .flags = GENL_ADMIN_PERM,
6584                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6585                                   NL80211_FLAG_NEED_RTNL,
6586         },
6587         {
6588                 .cmd = NL80211_CMD_ASSOCIATE,
6589                 .doit = nl80211_associate,
6590                 .policy = nl80211_policy,
6591                 .flags = GENL_ADMIN_PERM,
6592                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6593                                   NL80211_FLAG_NEED_RTNL,
6594         },
6595         {
6596                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6597                 .doit = nl80211_deauthenticate,
6598                 .policy = nl80211_policy,
6599                 .flags = GENL_ADMIN_PERM,
6600                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6601                                   NL80211_FLAG_NEED_RTNL,
6602         },
6603         {
6604                 .cmd = NL80211_CMD_DISASSOCIATE,
6605                 .doit = nl80211_disassociate,
6606                 .policy = nl80211_policy,
6607                 .flags = GENL_ADMIN_PERM,
6608                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6609                                   NL80211_FLAG_NEED_RTNL,
6610         },
6611         {
6612                 .cmd = NL80211_CMD_JOIN_IBSS,
6613                 .doit = nl80211_join_ibss,
6614                 .policy = nl80211_policy,
6615                 .flags = GENL_ADMIN_PERM,
6616                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6617                                   NL80211_FLAG_NEED_RTNL,
6618         },
6619         {
6620                 .cmd = NL80211_CMD_LEAVE_IBSS,
6621                 .doit = nl80211_leave_ibss,
6622                 .policy = nl80211_policy,
6623                 .flags = GENL_ADMIN_PERM,
6624                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6625                                   NL80211_FLAG_NEED_RTNL,
6626         },
6627 #ifdef CONFIG_NL80211_TESTMODE
6628         {
6629                 .cmd = NL80211_CMD_TESTMODE,
6630                 .doit = nl80211_testmode_do,
6631                 .dumpit = nl80211_testmode_dump,
6632                 .policy = nl80211_policy,
6633                 .flags = GENL_ADMIN_PERM,
6634                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6635                                   NL80211_FLAG_NEED_RTNL,
6636         },
6637 #endif
6638         {
6639                 .cmd = NL80211_CMD_CONNECT,
6640                 .doit = nl80211_connect,
6641                 .policy = nl80211_policy,
6642                 .flags = GENL_ADMIN_PERM,
6643                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6644                                   NL80211_FLAG_NEED_RTNL,
6645         },
6646         {
6647                 .cmd = NL80211_CMD_DISCONNECT,
6648                 .doit = nl80211_disconnect,
6649                 .policy = nl80211_policy,
6650                 .flags = GENL_ADMIN_PERM,
6651                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6652                                   NL80211_FLAG_NEED_RTNL,
6653         },
6654         {
6655                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6656                 .doit = nl80211_wiphy_netns,
6657                 .policy = nl80211_policy,
6658                 .flags = GENL_ADMIN_PERM,
6659                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6660                                   NL80211_FLAG_NEED_RTNL,
6661         },
6662         {
6663                 .cmd = NL80211_CMD_GET_SURVEY,
6664                 .policy = nl80211_policy,
6665                 .dumpit = nl80211_dump_survey,
6666         },
6667         {
6668                 .cmd = NL80211_CMD_SET_PMKSA,
6669                 .doit = nl80211_setdel_pmksa,
6670                 .policy = nl80211_policy,
6671                 .flags = GENL_ADMIN_PERM,
6672                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6673                                   NL80211_FLAG_NEED_RTNL,
6674         },
6675         {
6676                 .cmd = NL80211_CMD_DEL_PMKSA,
6677                 .doit = nl80211_setdel_pmksa,
6678                 .policy = nl80211_policy,
6679                 .flags = GENL_ADMIN_PERM,
6680                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6681                                   NL80211_FLAG_NEED_RTNL,
6682         },
6683         {
6684                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6685                 .doit = nl80211_flush_pmksa,
6686                 .policy = nl80211_policy,
6687                 .flags = GENL_ADMIN_PERM,
6688                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6689                                   NL80211_FLAG_NEED_RTNL,
6690         },
6691         {
6692                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6693                 .doit = nl80211_remain_on_channel,
6694                 .policy = nl80211_policy,
6695                 .flags = GENL_ADMIN_PERM,
6696                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6697                                   NL80211_FLAG_NEED_RTNL,
6698         },
6699         {
6700                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6701                 .doit = nl80211_cancel_remain_on_channel,
6702                 .policy = nl80211_policy,
6703                 .flags = GENL_ADMIN_PERM,
6704                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6705                                   NL80211_FLAG_NEED_RTNL,
6706         },
6707         {
6708                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6709                 .doit = nl80211_set_tx_bitrate_mask,
6710                 .policy = nl80211_policy,
6711                 .flags = GENL_ADMIN_PERM,
6712                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6713                                   NL80211_FLAG_NEED_RTNL,
6714         },
6715         {
6716                 .cmd = NL80211_CMD_REGISTER_FRAME,
6717                 .doit = nl80211_register_mgmt,
6718                 .policy = nl80211_policy,
6719                 .flags = GENL_ADMIN_PERM,
6720                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6721                                   NL80211_FLAG_NEED_RTNL,
6722         },
6723         {
6724                 .cmd = NL80211_CMD_FRAME,
6725                 .doit = nl80211_tx_mgmt,
6726                 .policy = nl80211_policy,
6727                 .flags = GENL_ADMIN_PERM,
6728                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6729                                   NL80211_FLAG_NEED_RTNL,
6730         },
6731         {
6732                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6733                 .doit = nl80211_tx_mgmt_cancel_wait,
6734                 .policy = nl80211_policy,
6735                 .flags = GENL_ADMIN_PERM,
6736                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6737                                   NL80211_FLAG_NEED_RTNL,
6738         },
6739         {
6740                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6741                 .doit = nl80211_set_power_save,
6742                 .policy = nl80211_policy,
6743                 .flags = GENL_ADMIN_PERM,
6744                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6745                                   NL80211_FLAG_NEED_RTNL,
6746         },
6747         {
6748                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6749                 .doit = nl80211_get_power_save,
6750                 .policy = nl80211_policy,
6751                 /* can be retrieved by unprivileged users */
6752                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6753                                   NL80211_FLAG_NEED_RTNL,
6754         },
6755         {
6756                 .cmd = NL80211_CMD_SET_CQM,
6757                 .doit = nl80211_set_cqm,
6758                 .policy = nl80211_policy,
6759                 .flags = GENL_ADMIN_PERM,
6760                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6761                                   NL80211_FLAG_NEED_RTNL,
6762         },
6763         {
6764                 .cmd = NL80211_CMD_SET_CHANNEL,
6765                 .doit = nl80211_set_channel,
6766                 .policy = nl80211_policy,
6767                 .flags = GENL_ADMIN_PERM,
6768                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6769                                   NL80211_FLAG_NEED_RTNL,
6770         },
6771         {
6772                 .cmd = NL80211_CMD_SET_WDS_PEER,
6773                 .doit = nl80211_set_wds_peer,
6774                 .policy = nl80211_policy,
6775                 .flags = GENL_ADMIN_PERM,
6776                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6777                                   NL80211_FLAG_NEED_RTNL,
6778         },
6779         {
6780                 .cmd = NL80211_CMD_JOIN_MESH,
6781                 .doit = nl80211_join_mesh,
6782                 .policy = nl80211_policy,
6783                 .flags = GENL_ADMIN_PERM,
6784                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6785                                   NL80211_FLAG_NEED_RTNL,
6786         },
6787         {
6788                 .cmd = NL80211_CMD_LEAVE_MESH,
6789                 .doit = nl80211_leave_mesh,
6790                 .policy = nl80211_policy,
6791                 .flags = GENL_ADMIN_PERM,
6792                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6793                                   NL80211_FLAG_NEED_RTNL,
6794         },
6795         {
6796                 .cmd = NL80211_CMD_GET_WOWLAN,
6797                 .doit = nl80211_get_wowlan,
6798                 .policy = nl80211_policy,
6799                 /* can be retrieved by unprivileged users */
6800                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6801                                   NL80211_FLAG_NEED_RTNL,
6802         },
6803         {
6804                 .cmd = NL80211_CMD_SET_WOWLAN,
6805                 .doit = nl80211_set_wowlan,
6806                 .policy = nl80211_policy,
6807                 .flags = GENL_ADMIN_PERM,
6808                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6809                                   NL80211_FLAG_NEED_RTNL,
6810         },
6811         {
6812                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6813                 .doit = nl80211_set_rekey_data,
6814                 .policy = nl80211_policy,
6815                 .flags = GENL_ADMIN_PERM,
6816                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6817                                   NL80211_FLAG_NEED_RTNL,
6818         },
6819         {
6820                 .cmd = NL80211_CMD_TDLS_MGMT,
6821                 .doit = nl80211_tdls_mgmt,
6822                 .policy = nl80211_policy,
6823                 .flags = GENL_ADMIN_PERM,
6824                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6825                                   NL80211_FLAG_NEED_RTNL,
6826         },
6827         {
6828                 .cmd = NL80211_CMD_TDLS_OPER,
6829                 .doit = nl80211_tdls_oper,
6830                 .policy = nl80211_policy,
6831                 .flags = GENL_ADMIN_PERM,
6832                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6833                                   NL80211_FLAG_NEED_RTNL,
6834         },
6835         {
6836                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
6837                 .doit = nl80211_register_unexpected_frame,
6838                 .policy = nl80211_policy,
6839                 .flags = GENL_ADMIN_PERM,
6840                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6841                                   NL80211_FLAG_NEED_RTNL,
6842         },
6843         {
6844                 .cmd = NL80211_CMD_PROBE_CLIENT,
6845                 .doit = nl80211_probe_client,
6846                 .policy = nl80211_policy,
6847                 .flags = GENL_ADMIN_PERM,
6848                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6849                                   NL80211_FLAG_NEED_RTNL,
6850         },
6851         {
6852                 .cmd = NL80211_CMD_REGISTER_BEACONS,
6853                 .doit = nl80211_register_beacons,
6854                 .policy = nl80211_policy,
6855                 .flags = GENL_ADMIN_PERM,
6856                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6857                                   NL80211_FLAG_NEED_RTNL,
6858         },
6859         {
6860                 .cmd = NL80211_CMD_SET_NOACK_MAP,
6861                 .doit = nl80211_set_noack_map,
6862                 .policy = nl80211_policy,
6863                 .flags = GENL_ADMIN_PERM,
6864                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6865                                   NL80211_FLAG_NEED_RTNL,
6866         },
6867
6868 };
6869
6870 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6871         .name = "mlme",
6872 };
6873
6874 /* multicast groups */
6875 static struct genl_multicast_group nl80211_config_mcgrp = {
6876         .name = "config",
6877 };
6878 static struct genl_multicast_group nl80211_scan_mcgrp = {
6879         .name = "scan",
6880 };
6881 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6882         .name = "regulatory",
6883 };
6884
6885 /* notification functions */
6886
6887 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6888 {
6889         struct sk_buff *msg;
6890
6891         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6892         if (!msg)
6893                 return;
6894
6895         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
6896                 nlmsg_free(msg);
6897                 return;
6898         }
6899
6900         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6901                                 nl80211_config_mcgrp.id, GFP_KERNEL);
6902 }
6903
6904 static int nl80211_add_scan_req(struct sk_buff *msg,
6905                                 struct cfg80211_registered_device *rdev)
6906 {
6907         struct cfg80211_scan_request *req = rdev->scan_req;
6908         struct nlattr *nest;
6909         int i;
6910
6911         ASSERT_RDEV_LOCK(rdev);
6912
6913         if (WARN_ON(!req))
6914                 return 0;
6915
6916         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
6917         if (!nest)
6918                 goto nla_put_failure;
6919         for (i = 0; i < req->n_ssids; i++)
6920                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
6921         nla_nest_end(msg, nest);
6922
6923         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
6924         if (!nest)
6925                 goto nla_put_failure;
6926         for (i = 0; i < req->n_channels; i++)
6927                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
6928         nla_nest_end(msg, nest);
6929
6930         if (req->ie)
6931                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
6932
6933         return 0;
6934  nla_put_failure:
6935         return -ENOBUFS;
6936 }
6937
6938 static int nl80211_send_scan_msg(struct sk_buff *msg,
6939                                  struct cfg80211_registered_device *rdev,
6940                                  struct net_device *netdev,
6941                                  u32 pid, u32 seq, int flags,
6942                                  u32 cmd)
6943 {
6944         void *hdr;
6945
6946         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6947         if (!hdr)
6948                 return -1;
6949
6950         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6951         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6952
6953         /* ignore errors and send incomplete event anyway */
6954         nl80211_add_scan_req(msg, rdev);
6955
6956         return genlmsg_end(msg, hdr);
6957
6958  nla_put_failure:
6959         genlmsg_cancel(msg, hdr);
6960         return -EMSGSIZE;
6961 }
6962
6963 static int
6964 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6965                             struct cfg80211_registered_device *rdev,
6966                             struct net_device *netdev,
6967                             u32 pid, u32 seq, int flags, u32 cmd)
6968 {
6969         void *hdr;
6970
6971         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6972         if (!hdr)
6973                 return -1;
6974
6975         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6976         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6977
6978         return genlmsg_end(msg, hdr);
6979
6980  nla_put_failure:
6981         genlmsg_cancel(msg, hdr);
6982         return -EMSGSIZE;
6983 }
6984
6985 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
6986                              struct net_device *netdev)
6987 {
6988         struct sk_buff *msg;
6989
6990         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6991         if (!msg)
6992                 return;
6993
6994         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6995                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
6996                 nlmsg_free(msg);
6997                 return;
6998         }
6999
7000         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7001                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7002 }
7003
7004 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7005                             struct net_device *netdev)
7006 {
7007         struct sk_buff *msg;
7008
7009         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7010         if (!msg)
7011                 return;
7012
7013         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7014                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7015                 nlmsg_free(msg);
7016                 return;
7017         }
7018
7019         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7020                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7021 }
7022
7023 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7024                                struct net_device *netdev)
7025 {
7026         struct sk_buff *msg;
7027
7028         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7029         if (!msg)
7030                 return;
7031
7032         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7033                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7034                 nlmsg_free(msg);
7035                 return;
7036         }
7037
7038         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7039                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7040 }
7041
7042 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7043                                      struct net_device *netdev)
7044 {
7045         struct sk_buff *msg;
7046
7047         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7048         if (!msg)
7049                 return;
7050
7051         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7052                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7053                 nlmsg_free(msg);
7054                 return;
7055         }
7056
7057         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7058                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7059 }
7060
7061 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7062                              struct net_device *netdev, u32 cmd)
7063 {
7064         struct sk_buff *msg;
7065
7066         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7067         if (!msg)
7068                 return;
7069
7070         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7071                 nlmsg_free(msg);
7072                 return;
7073         }
7074
7075         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7076                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7077 }
7078
7079 /*
7080  * This can happen on global regulatory changes or device specific settings
7081  * based on custom world regulatory domains.
7082  */
7083 void nl80211_send_reg_change_event(struct regulatory_request *request)
7084 {
7085         struct sk_buff *msg;
7086         void *hdr;
7087
7088         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7089         if (!msg)
7090                 return;
7091
7092         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7093         if (!hdr) {
7094                 nlmsg_free(msg);
7095                 return;
7096         }
7097
7098         /* Userspace can always count this one always being set */
7099         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
7100
7101         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
7102                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7103                            NL80211_REGDOM_TYPE_WORLD);
7104         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
7105                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7106                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
7107         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7108                  request->intersect)
7109                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7110                            NL80211_REGDOM_TYPE_INTERSECTION);
7111         else {
7112                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
7113                            NL80211_REGDOM_TYPE_COUNTRY);
7114                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
7115         }
7116
7117         if (wiphy_idx_valid(request->wiphy_idx))
7118                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
7119
7120         genlmsg_end(msg, hdr);
7121
7122         rcu_read_lock();
7123         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7124                                 GFP_ATOMIC);
7125         rcu_read_unlock();
7126
7127         return;
7128
7129 nla_put_failure:
7130         genlmsg_cancel(msg, hdr);
7131         nlmsg_free(msg);
7132 }
7133
7134 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7135                                     struct net_device *netdev,
7136                                     const u8 *buf, size_t len,
7137                                     enum nl80211_commands cmd, gfp_t gfp)
7138 {
7139         struct sk_buff *msg;
7140         void *hdr;
7141
7142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7143         if (!msg)
7144                 return;
7145
7146         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7147         if (!hdr) {
7148                 nlmsg_free(msg);
7149                 return;
7150         }
7151
7152         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7153         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7154         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7155
7156         genlmsg_end(msg, hdr);
7157
7158         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7159                                 nl80211_mlme_mcgrp.id, gfp);
7160         return;
7161
7162  nla_put_failure:
7163         genlmsg_cancel(msg, hdr);
7164         nlmsg_free(msg);
7165 }
7166
7167 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7168                           struct net_device *netdev, const u8 *buf,
7169                           size_t len, gfp_t gfp)
7170 {
7171         nl80211_send_mlme_event(rdev, netdev, buf, len,
7172                                 NL80211_CMD_AUTHENTICATE, gfp);
7173 }
7174
7175 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7176                            struct net_device *netdev, const u8 *buf,
7177                            size_t len, gfp_t gfp)
7178 {
7179         nl80211_send_mlme_event(rdev, netdev, buf, len,
7180                                 NL80211_CMD_ASSOCIATE, gfp);
7181 }
7182
7183 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7184                          struct net_device *netdev, const u8 *buf,
7185                          size_t len, gfp_t gfp)
7186 {
7187         nl80211_send_mlme_event(rdev, netdev, buf, len,
7188                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7189 }
7190
7191 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7192                            struct net_device *netdev, const u8 *buf,
7193                            size_t len, gfp_t gfp)
7194 {
7195         nl80211_send_mlme_event(rdev, netdev, buf, len,
7196                                 NL80211_CMD_DISASSOCIATE, gfp);
7197 }
7198
7199 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7200                                 struct net_device *netdev, const u8 *buf,
7201                                 size_t len, gfp_t gfp)
7202 {
7203         nl80211_send_mlme_event(rdev, netdev, buf, len,
7204                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7205 }
7206
7207 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7208                                   struct net_device *netdev, const u8 *buf,
7209                                   size_t len, gfp_t gfp)
7210 {
7211         nl80211_send_mlme_event(rdev, netdev, buf, len,
7212                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7213 }
7214
7215 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7216                                       struct net_device *netdev, int cmd,
7217                                       const u8 *addr, gfp_t gfp)
7218 {
7219         struct sk_buff *msg;
7220         void *hdr;
7221
7222         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7223         if (!msg)
7224                 return;
7225
7226         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7227         if (!hdr) {
7228                 nlmsg_free(msg);
7229                 return;
7230         }
7231
7232         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7233         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7234         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
7235         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7236
7237         genlmsg_end(msg, hdr);
7238
7239         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7240                                 nl80211_mlme_mcgrp.id, gfp);
7241         return;
7242
7243  nla_put_failure:
7244         genlmsg_cancel(msg, hdr);
7245         nlmsg_free(msg);
7246 }
7247
7248 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7249                                struct net_device *netdev, const u8 *addr,
7250                                gfp_t gfp)
7251 {
7252         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7253                                   addr, gfp);
7254 }
7255
7256 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7257                                 struct net_device *netdev, const u8 *addr,
7258                                 gfp_t gfp)
7259 {
7260         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7261                                   addr, gfp);
7262 }
7263
7264 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7265                                  struct net_device *netdev, const u8 *bssid,
7266                                  const u8 *req_ie, size_t req_ie_len,
7267                                  const u8 *resp_ie, size_t resp_ie_len,
7268                                  u16 status, gfp_t gfp)
7269 {
7270         struct sk_buff *msg;
7271         void *hdr;
7272
7273         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7274         if (!msg)
7275                 return;
7276
7277         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7278         if (!hdr) {
7279                 nlmsg_free(msg);
7280                 return;
7281         }
7282
7283         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7284         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7285         if (bssid)
7286                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7287         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
7288         if (req_ie)
7289                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7290         if (resp_ie)
7291                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7292
7293         genlmsg_end(msg, hdr);
7294
7295         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7296                                 nl80211_mlme_mcgrp.id, gfp);
7297         return;
7298
7299  nla_put_failure:
7300         genlmsg_cancel(msg, hdr);
7301         nlmsg_free(msg);
7302
7303 }
7304
7305 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7306                          struct net_device *netdev, const u8 *bssid,
7307                          const u8 *req_ie, size_t req_ie_len,
7308                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7309 {
7310         struct sk_buff *msg;
7311         void *hdr;
7312
7313         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7314         if (!msg)
7315                 return;
7316
7317         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7318         if (!hdr) {
7319                 nlmsg_free(msg);
7320                 return;
7321         }
7322
7323         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7324         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7325         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7326         if (req_ie)
7327                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
7328         if (resp_ie)
7329                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
7330
7331         genlmsg_end(msg, hdr);
7332
7333         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7334                                 nl80211_mlme_mcgrp.id, gfp);
7335         return;
7336
7337  nla_put_failure:
7338         genlmsg_cancel(msg, hdr);
7339         nlmsg_free(msg);
7340
7341 }
7342
7343 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7344                                struct net_device *netdev, u16 reason,
7345                                const u8 *ie, size_t ie_len, bool from_ap)
7346 {
7347         struct sk_buff *msg;
7348         void *hdr;
7349
7350         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7351         if (!msg)
7352                 return;
7353
7354         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7355         if (!hdr) {
7356                 nlmsg_free(msg);
7357                 return;
7358         }
7359
7360         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7361         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7362         if (from_ap && reason)
7363                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
7364         if (from_ap)
7365                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
7366         if (ie)
7367                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
7368
7369         genlmsg_end(msg, hdr);
7370
7371         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7372                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7373         return;
7374
7375  nla_put_failure:
7376         genlmsg_cancel(msg, hdr);
7377         nlmsg_free(msg);
7378
7379 }
7380
7381 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7382                              struct net_device *netdev, const u8 *bssid,
7383                              gfp_t gfp)
7384 {
7385         struct sk_buff *msg;
7386         void *hdr;
7387
7388         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7389         if (!msg)
7390                 return;
7391
7392         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7393         if (!hdr) {
7394                 nlmsg_free(msg);
7395                 return;
7396         }
7397
7398         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7399         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7400         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7401
7402         genlmsg_end(msg, hdr);
7403
7404         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7405                                 nl80211_mlme_mcgrp.id, gfp);
7406         return;
7407
7408  nla_put_failure:
7409         genlmsg_cancel(msg, hdr);
7410         nlmsg_free(msg);
7411 }
7412
7413 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7414                 struct net_device *netdev,
7415                 const u8 *macaddr, const u8* ie, u8 ie_len,
7416                 gfp_t gfp)
7417 {
7418         struct sk_buff *msg;
7419         void *hdr;
7420
7421         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7422         if (!msg)
7423                 return;
7424
7425         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7426         if (!hdr) {
7427                 nlmsg_free(msg);
7428                 return;
7429         }
7430
7431         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7432         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7433         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
7434         if (ie_len && ie)
7435                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
7436
7437         genlmsg_end(msg, hdr);
7438
7439         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7440                                 nl80211_mlme_mcgrp.id, gfp);
7441         return;
7442
7443  nla_put_failure:
7444         genlmsg_cancel(msg, hdr);
7445         nlmsg_free(msg);
7446 }
7447
7448 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7449                                  struct net_device *netdev, const u8 *addr,
7450                                  enum nl80211_key_type key_type, int key_id,
7451                                  const u8 *tsc, gfp_t gfp)
7452 {
7453         struct sk_buff *msg;
7454         void *hdr;
7455
7456         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7457         if (!msg)
7458                 return;
7459
7460         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7461         if (!hdr) {
7462                 nlmsg_free(msg);
7463                 return;
7464         }
7465
7466         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7467         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7468         if (addr)
7469                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7470         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
7471         if (key_id != -1)
7472                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
7473         if (tsc)
7474                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
7475
7476         genlmsg_end(msg, hdr);
7477
7478         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7479                                 nl80211_mlme_mcgrp.id, gfp);
7480         return;
7481
7482  nla_put_failure:
7483         genlmsg_cancel(msg, hdr);
7484         nlmsg_free(msg);
7485 }
7486
7487 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7488                                     struct ieee80211_channel *channel_before,
7489                                     struct ieee80211_channel *channel_after)
7490 {
7491         struct sk_buff *msg;
7492         void *hdr;
7493         struct nlattr *nl_freq;
7494
7495         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7496         if (!msg)
7497                 return;
7498
7499         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7500         if (!hdr) {
7501                 nlmsg_free(msg);
7502                 return;
7503         }
7504
7505         /*
7506          * Since we are applying the beacon hint to a wiphy we know its
7507          * wiphy_idx is valid
7508          */
7509         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
7510
7511         /* Before */
7512         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7513         if (!nl_freq)
7514                 goto nla_put_failure;
7515         if (nl80211_msg_put_channel(msg, channel_before))
7516                 goto nla_put_failure;
7517         nla_nest_end(msg, nl_freq);
7518
7519         /* After */
7520         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7521         if (!nl_freq)
7522                 goto nla_put_failure;
7523         if (nl80211_msg_put_channel(msg, channel_after))
7524                 goto nla_put_failure;
7525         nla_nest_end(msg, nl_freq);
7526
7527         genlmsg_end(msg, hdr);
7528
7529         rcu_read_lock();
7530         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7531                                 GFP_ATOMIC);
7532         rcu_read_unlock();
7533
7534         return;
7535
7536 nla_put_failure:
7537         genlmsg_cancel(msg, hdr);
7538         nlmsg_free(msg);
7539 }
7540
7541 static void nl80211_send_remain_on_chan_event(
7542         int cmd, struct cfg80211_registered_device *rdev,
7543         struct net_device *netdev, u64 cookie,
7544         struct ieee80211_channel *chan,
7545         enum nl80211_channel_type channel_type,
7546         unsigned int duration, gfp_t gfp)
7547 {
7548         struct sk_buff *msg;
7549         void *hdr;
7550
7551         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7552         if (!msg)
7553                 return;
7554
7555         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7556         if (!hdr) {
7557                 nlmsg_free(msg);
7558                 return;
7559         }
7560
7561         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7562         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7563         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
7564         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
7565         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7566
7567         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
7568                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
7569
7570         genlmsg_end(msg, hdr);
7571
7572         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7573                                 nl80211_mlme_mcgrp.id, gfp);
7574         return;
7575
7576  nla_put_failure:
7577         genlmsg_cancel(msg, hdr);
7578         nlmsg_free(msg);
7579 }
7580
7581 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7582                                     struct net_device *netdev, u64 cookie,
7583                                     struct ieee80211_channel *chan,
7584                                     enum nl80211_channel_type channel_type,
7585                                     unsigned int duration, gfp_t gfp)
7586 {
7587         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7588                                           rdev, netdev, cookie, chan,
7589                                           channel_type, duration, gfp);
7590 }
7591
7592 void nl80211_send_remain_on_channel_cancel(
7593         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7594         u64 cookie, struct ieee80211_channel *chan,
7595         enum nl80211_channel_type channel_type, gfp_t gfp)
7596 {
7597         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7598                                           rdev, netdev, cookie, chan,
7599                                           channel_type, 0, gfp);
7600 }
7601
7602 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7603                             struct net_device *dev, const u8 *mac_addr,
7604                             struct station_info *sinfo, gfp_t gfp)
7605 {
7606         struct sk_buff *msg;
7607
7608         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7609         if (!msg)
7610                 return;
7611
7612         if (nl80211_send_station(msg, 0, 0, 0,
7613                                  rdev, dev, mac_addr, sinfo) < 0) {
7614                 nlmsg_free(msg);
7615                 return;
7616         }
7617
7618         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7619                                 nl80211_mlme_mcgrp.id, gfp);
7620 }
7621
7622 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7623                                 struct net_device *dev, const u8 *mac_addr,
7624                                 gfp_t gfp)
7625 {
7626         struct sk_buff *msg;
7627         void *hdr;
7628
7629         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7630         if (!msg)
7631                 return;
7632
7633         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7634         if (!hdr) {
7635                 nlmsg_free(msg);
7636                 return;
7637         }
7638
7639         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7640         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
7641
7642         genlmsg_end(msg, hdr);
7643
7644         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7645                                 nl80211_mlme_mcgrp.id, gfp);
7646         return;
7647
7648  nla_put_failure:
7649         genlmsg_cancel(msg, hdr);
7650         nlmsg_free(msg);
7651 }
7652
7653 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
7654                                        const u8 *addr, gfp_t gfp)
7655 {
7656         struct wireless_dev *wdev = dev->ieee80211_ptr;
7657         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7658         struct sk_buff *msg;
7659         void *hdr;
7660         int err;
7661         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
7662
7663         if (!nlpid)
7664                 return false;
7665
7666         msg = nlmsg_new(100, gfp);
7667         if (!msg)
7668                 return true;
7669
7670         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7671         if (!hdr) {
7672                 nlmsg_free(msg);
7673                 return true;
7674         }
7675
7676         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7677         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7678         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7679
7680         err = genlmsg_end(msg, hdr);
7681         if (err < 0) {
7682                 nlmsg_free(msg);
7683                 return true;
7684         }
7685
7686         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7687         return true;
7688
7689  nla_put_failure:
7690         genlmsg_cancel(msg, hdr);
7691         nlmsg_free(msg);
7692         return true;
7693 }
7694
7695 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
7696 {
7697         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
7698                                           addr, gfp);
7699 }
7700
7701 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
7702                                     const u8 *addr, gfp_t gfp)
7703 {
7704         return __nl80211_unexpected_frame(dev,
7705                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
7706                                           addr, gfp);
7707 }
7708
7709 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7710                       struct net_device *netdev, u32 nlpid,
7711                       int freq, int sig_dbm,
7712                       const u8 *buf, size_t len, gfp_t gfp)
7713 {
7714         struct sk_buff *msg;
7715         void *hdr;
7716
7717         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7718         if (!msg)
7719                 return -ENOMEM;
7720
7721         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7722         if (!hdr) {
7723                 nlmsg_free(msg);
7724                 return -ENOMEM;
7725         }
7726
7727         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7728         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7729         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7730         if (sig_dbm)
7731                 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
7732         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7733
7734         genlmsg_end(msg, hdr);
7735
7736         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7737
7738  nla_put_failure:
7739         genlmsg_cancel(msg, hdr);
7740         nlmsg_free(msg);
7741         return -ENOBUFS;
7742 }
7743
7744 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7745                                  struct net_device *netdev, u64 cookie,
7746                                  const u8 *buf, size_t len, bool ack,
7747                                  gfp_t gfp)
7748 {
7749         struct sk_buff *msg;
7750         void *hdr;
7751
7752         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7753         if (!msg)
7754                 return;
7755
7756         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7757         if (!hdr) {
7758                 nlmsg_free(msg);
7759                 return;
7760         }
7761
7762         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7763         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7764         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7765         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7766         if (ack)
7767                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7768
7769         genlmsg_end(msg, hdr);
7770
7771         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
7772         return;
7773
7774  nla_put_failure:
7775         genlmsg_cancel(msg, hdr);
7776         nlmsg_free(msg);
7777 }
7778
7779 void
7780 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7781                              struct net_device *netdev,
7782                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7783                              gfp_t gfp)
7784 {
7785         struct sk_buff *msg;
7786         struct nlattr *pinfoattr;
7787         void *hdr;
7788
7789         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7790         if (!msg)
7791                 return;
7792
7793         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7794         if (!hdr) {
7795                 nlmsg_free(msg);
7796                 return;
7797         }
7798
7799         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7800         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7801
7802         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7803         if (!pinfoattr)
7804                 goto nla_put_failure;
7805
7806         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7807                     rssi_event);
7808
7809         nla_nest_end(msg, pinfoattr);
7810
7811         genlmsg_end(msg, hdr);
7812
7813         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7814                                 nl80211_mlme_mcgrp.id, gfp);
7815         return;
7816
7817  nla_put_failure:
7818         genlmsg_cancel(msg, hdr);
7819         nlmsg_free(msg);
7820 }
7821
7822 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7823                               struct net_device *netdev, const u8 *bssid,
7824                               const u8 *replay_ctr, gfp_t gfp)
7825 {
7826         struct sk_buff *msg;
7827         struct nlattr *rekey_attr;
7828         void *hdr;
7829
7830         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7831         if (!msg)
7832                 return;
7833
7834         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7835         if (!hdr) {
7836                 nlmsg_free(msg);
7837                 return;
7838         }
7839
7840         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7841         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7842         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7843
7844         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7845         if (!rekey_attr)
7846                 goto nla_put_failure;
7847
7848         NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7849                 NL80211_REPLAY_CTR_LEN, replay_ctr);
7850
7851         nla_nest_end(msg, rekey_attr);
7852
7853         genlmsg_end(msg, hdr);
7854
7855         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7856                                 nl80211_mlme_mcgrp.id, gfp);
7857         return;
7858
7859  nla_put_failure:
7860         genlmsg_cancel(msg, hdr);
7861         nlmsg_free(msg);
7862 }
7863
7864 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
7865                                     struct net_device *netdev, int index,
7866                                     const u8 *bssid, bool preauth, gfp_t gfp)
7867 {
7868         struct sk_buff *msg;
7869         struct nlattr *attr;
7870         void *hdr;
7871
7872         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7873         if (!msg)
7874                 return;
7875
7876         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
7877         if (!hdr) {
7878                 nlmsg_free(msg);
7879                 return;
7880         }
7881
7882         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7883         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7884
7885         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
7886         if (!attr)
7887                 goto nla_put_failure;
7888
7889         NLA_PUT_U32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index);
7890         NLA_PUT(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid);
7891         if (preauth)
7892                 NLA_PUT_FLAG(msg, NL80211_PMKSA_CANDIDATE_PREAUTH);
7893
7894         nla_nest_end(msg, attr);
7895
7896         genlmsg_end(msg, hdr);
7897
7898         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7899                                 nl80211_mlme_mcgrp.id, gfp);
7900         return;
7901
7902  nla_put_failure:
7903         genlmsg_cancel(msg, hdr);
7904         nlmsg_free(msg);
7905 }
7906
7907 void
7908 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
7909                                 struct net_device *netdev, const u8 *peer,
7910                                 u32 num_packets, gfp_t gfp)
7911 {
7912         struct sk_buff *msg;
7913         struct nlattr *pinfoattr;
7914         void *hdr;
7915
7916         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7917         if (!msg)
7918                 return;
7919
7920         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7921         if (!hdr) {
7922                 nlmsg_free(msg);
7923                 return;
7924         }
7925
7926         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7927         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7928         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
7929
7930         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7931         if (!pinfoattr)
7932                 goto nla_put_failure;
7933
7934         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
7935
7936         nla_nest_end(msg, pinfoattr);
7937
7938         genlmsg_end(msg, hdr);
7939
7940         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7941                                 nl80211_mlme_mcgrp.id, gfp);
7942         return;
7943
7944  nla_put_failure:
7945         genlmsg_cancel(msg, hdr);
7946         nlmsg_free(msg);
7947 }
7948
7949 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
7950                            u64 cookie, bool acked, gfp_t gfp)
7951 {
7952         struct wireless_dev *wdev = dev->ieee80211_ptr;
7953         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
7954         struct sk_buff *msg;
7955         void *hdr;
7956         int err;
7957
7958         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7959         if (!msg)
7960                 return;
7961
7962         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
7963         if (!hdr) {
7964                 nlmsg_free(msg);
7965                 return;
7966         }
7967
7968         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7969         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7970         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7971         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7972         if (acked)
7973                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7974
7975         err = genlmsg_end(msg, hdr);
7976         if (err < 0) {
7977                 nlmsg_free(msg);
7978                 return;
7979         }
7980
7981         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7982                                 nl80211_mlme_mcgrp.id, gfp);
7983         return;
7984
7985  nla_put_failure:
7986         genlmsg_cancel(msg, hdr);
7987         nlmsg_free(msg);
7988 }
7989 EXPORT_SYMBOL(cfg80211_probe_status);
7990
7991 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
7992                                  const u8 *frame, size_t len,
7993                                  int freq, int sig_dbm, gfp_t gfp)
7994 {
7995         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
7996         struct sk_buff *msg;
7997         void *hdr;
7998         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
7999
8000         if (!nlpid)
8001                 return;
8002
8003         msg = nlmsg_new(len + 100, gfp);
8004         if (!msg)
8005                 return;
8006
8007         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8008         if (!hdr) {
8009                 nlmsg_free(msg);
8010                 return;
8011         }
8012
8013         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
8014         if (freq)
8015                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
8016         if (sig_dbm)
8017                 NLA_PUT_U32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm);
8018         NLA_PUT(msg, NL80211_ATTR_FRAME, len, frame);
8019
8020         genlmsg_end(msg, hdr);
8021
8022         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8023         return;
8024
8025  nla_put_failure:
8026         genlmsg_cancel(msg, hdr);
8027         nlmsg_free(msg);
8028 }
8029 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8030
8031 static int nl80211_netlink_notify(struct notifier_block * nb,
8032                                   unsigned long state,
8033                                   void *_notify)
8034 {
8035         struct netlink_notify *notify = _notify;
8036         struct cfg80211_registered_device *rdev;
8037         struct wireless_dev *wdev;
8038
8039         if (state != NETLINK_URELEASE)
8040                 return NOTIFY_DONE;
8041
8042         rcu_read_lock();
8043
8044         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8045                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8046                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8047                 if (rdev->ap_beacons_nlpid == notify->pid)
8048                         rdev->ap_beacons_nlpid = 0;
8049         }
8050
8051         rcu_read_unlock();
8052
8053         return NOTIFY_DONE;
8054 }
8055
8056 static struct notifier_block nl80211_netlink_notifier = {
8057         .notifier_call = nl80211_netlink_notify,
8058 };
8059
8060 /* initialisation/exit functions */
8061
8062 int nl80211_init(void)
8063 {
8064         int err;
8065
8066         err = genl_register_family_with_ops(&nl80211_fam,
8067                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8068         if (err)
8069                 return err;
8070
8071         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8072         if (err)
8073                 goto err_out;
8074
8075         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8076         if (err)
8077                 goto err_out;
8078
8079         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8080         if (err)
8081                 goto err_out;
8082
8083         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8084         if (err)
8085                 goto err_out;
8086
8087 #ifdef CONFIG_NL80211_TESTMODE
8088         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8089         if (err)
8090                 goto err_out;
8091 #endif
8092
8093         err = netlink_register_notifier(&nl80211_netlink_notifier);
8094         if (err)
8095                 goto err_out;
8096
8097         return 0;
8098  err_out:
8099         genl_unregister_family(&nl80211_fam);
8100         return err;
8101 }
8102
8103 void nl80211_exit(void)
8104 {
8105         netlink_unregister_notifier(&nl80211_netlink_notifier);
8106         genl_unregister_family(&nl80211_fam);
8107 }