Pileus Git - ~andy/linux/blob - 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 static struct cfg80211_registered_device *
  74 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
  75 {
  76         struct cfg80211_registered_device *rdev = NULL, *tmp;
  77         struct net_device *netdev;
  78
  79         assert_cfg80211_lock();
  80
  81         if (!attrs[NL80211_ATTR_WIPHY] &&
  82             !attrs[NL80211_ATTR_IFINDEX])
  83                 return ERR_PTR(-EINVAL);
  84
  85         if (attrs[NL80211_ATTR_WIPHY])
  86                 rdev = cfg80211_rdev_by_wiphy_idx(
  87                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
  88
  89         if (attrs[NL80211_ATTR_IFINDEX]) {
  90                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  91                 netdev = dev_get_by_index(netns, ifindex);
  92                 if (netdev) {
  93                         if (netdev->ieee80211_ptr)
  94                                 tmp = wiphy_to_dev(
  95                                                 netdev->ieee80211_ptr->wiphy);
  96                         else
  97                                 tmp = NULL;
  98
  99                         dev_put(netdev);
 100
 101                         /* not wireless device -- return error */
 102                         if (!tmp)
 103                                 return ERR_PTR(-EINVAL);
 104
 105                         /* mismatch -- return error */
 106                         if (rdev && tmp != rdev)
 107                                 return ERR_PTR(-EINVAL);
 108
 109                         rdev = tmp;
 110                 }
 111         }
 112
 113         if (!rdev)
 114                 return ERR_PTR(-ENODEV);
 115
 116         if (netns != wiphy_net(&rdev->wiphy))
 117                 return ERR_PTR(-ENODEV);
 118
 119         return rdev;
 120 }
 121
 122 /*
 123  * This function returns a pointer to the driver
 124  * that the genl_info item that is passed refers to.
 125  * If successful, it returns non-NULL and also locks
 126  * the driver's mutex!
 127  *
 128  * This means that you need to call cfg80211_unlock_rdev()
 129  * before being allowed to acquire &cfg80211_mutex!
 130  *
 131  * This is necessary because we need to lock the global
 132  * mutex to get an item off the list safely, and then
 133  * we lock the rdev mutex so it doesn't go away under us.
 134  *
 135  * We don't want to keep cfg80211_mutex locked
 136  * for all the time in order to allow requests on
 137  * other interfaces to go through at the same time.
 138  *
 139  * The result of this can be a PTR_ERR and hence must
 140  * be checked with IS_ERR() for errors.
 141  */
 142 static struct cfg80211_registered_device *
 143 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 144 {
 145         struct cfg80211_registered_device *rdev;
 146
 147         mutex_lock(&cfg80211_mutex);
 148         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 149
 150         /* if it is not an error we grab the lock on
 151          * it to assure it won't be going away while
 152          * we operate on it */
 153         if (!IS_ERR(rdev))
 154                 mutex_lock(&rdev->mtx);
 155
 156         mutex_unlock(&cfg80211_mutex);
 157
 158         return rdev;
 159 }
 160
 161 /* policy for the attributes */
 162 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 163         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 164         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 165                                       .len = 20-1 },
 166         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 167         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 170         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 171         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 172         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 174
 175         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 176         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 178
 179         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 180         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 181
 182         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 183         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 184                                     .len = WLAN_MAX_KEY_LEN },
 185         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 186         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 187         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 188         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 189         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 190
 191         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 192         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 193         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 194                                        .len = IEEE80211_MAX_DATA_LEN },
 195         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 196                                        .len = IEEE80211_MAX_DATA_LEN },
 197         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 198         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 199         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 200         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 201                                                .len = NL80211_MAX_SUPP_RATES },
 202         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 203         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 204         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 205         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 206                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 207         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 208
 209         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 210         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 211
 212         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 213         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 214         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 215         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 216                                            .len = NL80211_MAX_SUPP_RATES },
 217         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 218
 219         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 220         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 221
 222         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 223
 224         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 225         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 226                               .len = IEEE80211_MAX_DATA_LEN },
 227         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 228         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 229
 230         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 231                                 .len = IEEE80211_MAX_SSID_LEN },
 232         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 234         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 235         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 236         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 237         [NL80211_ATTR_STA_FLAGS2] = {
 238                 .len = sizeof(struct nl80211_sta_flag_update),
 239         },
 240         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 241         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 242         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 243         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 244         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 245         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 246         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 247         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 248         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 249                                  .len = WLAN_PMKID_LEN },
 250         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 251         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 252         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 253         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 254                                  .len = IEEE80211_MAX_DATA_LEN },
 255         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 256         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 257         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 258         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 259         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 261         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 262         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 263         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 264         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 265         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 266         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 267         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 268         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 269         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 270         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 271         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 272         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 273         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 274         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 275                                          .len = IEEE80211_MAX_DATA_LEN },
 276         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 277                                          .len = IEEE80211_MAX_DATA_LEN },
 278         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 280         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 281         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 282         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 283         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 284         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 285         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 286         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 287         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 288                                       .len = IEEE80211_MAX_DATA_LEN },
 289         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 290         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 291         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 292                 .len = NL80211_HT_CAPABILITY_LEN
 293         },
 294         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 295         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 296         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 297 };
 298
 299 /* policy for the key attributes */
 300 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 301         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 302         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 303         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 304         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 305         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 306         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 307         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 308         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 309 };
 310
 311 /* policy for the key default flags */
 312 static const struct nla_policy
 313 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 314         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 315         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 316 };
 317
 318 /* policy for WoWLAN attributes */
 319 static const struct nla_policy
 320 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 321         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 322         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 323         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 324         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 325         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 326         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 327         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 328         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 329 };
 330
 331 /* policy for GTK rekey offload attributes */
 332 static const struct nla_policy
 333 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 334         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 335         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 336         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 337 };
 338
 339 static const struct nla_policy
 340 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 341         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 342                                                  .len = IEEE80211_MAX_SSID_LEN },
 343         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 344 };
 345
 346 /* ifidx get helper */
 347 static int nl80211_get_ifidx(struct netlink_callback *cb)
 348 {
 349         int res;
 350
 351         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 352                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 353                           nl80211_policy);
 354         if (res)
 355                 return res;
 356
 357         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 358                 return -EINVAL;
 359
 360         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 361         if (!res)
 362                 return -EINVAL;
 363         return res;
 364 }
 365
 366 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 367                                        struct netlink_callback *cb,
 368                                        struct cfg80211_registered_device **rdev,
 369                                        struct net_device **dev)
 370 {
 371         int ifidx = cb->args[0];
 372         int err;
 373
 374         if (!ifidx)
 375                 ifidx = nl80211_get_ifidx(cb);
 376         if (ifidx < 0)
 377                 return ifidx;
 378
 379         cb->args[0] = ifidx;
 380
 381         rtnl_lock();
 382
 383         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 384         if (!*dev) {
 385                 err = -ENODEV;
 386                 goto out_rtnl;
 387         }
 388
 389         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 390         if (IS_ERR(*rdev)) {
 391                 err = PTR_ERR(*rdev);
 392                 goto out_rtnl;
 393         }
 394
 395         return 0;
 396  out_rtnl:
 397         rtnl_unlock();
 398         return err;
 399 }
 400
 401 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 402 {
 403         cfg80211_unlock_rdev(rdev);
 404         rtnl_unlock();
 405 }
 406
 407 /* IE validation */
 408 static bool is_valid_ie_attr(const struct nlattr *attr)
 409 {
 410         const u8 *pos;
 411         int len;
 412
 413         if (!attr)
 414                 return true;
 415
 416         pos = nla_data(attr);
 417         len = nla_len(attr);
 418
 419         while (len) {
 420                 u8 elemlen;
 421
 422                 if (len < 2)
 423                         return false;
 424                 len -= 2;
 425
 426                 elemlen = pos[1];
 427                 if (elemlen > len)
 428                         return false;
 429
 430                 len -= elemlen;
 431                 pos += 2 + elemlen;
 432         }
 433
 434         return true;
 435 }
 436
 437 /* message building helper */
 438 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 439                                    int flags, u8 cmd)
 440 {
 441         /* since there is no private header just add the generic one */
 442         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 443 }
 444
 445 static int nl80211_msg_put_channel(struct sk_buff *msg,
 446                                    struct ieee80211_channel *chan)
 447 {
 448         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 449                         chan->center_freq))
 450                 goto nla_put_failure;
 451
 452         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 453             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 454                 goto nla_put_failure;
 455         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 456             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 457                 goto nla_put_failure;
 458         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 459             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 460                 goto nla_put_failure;
 461         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 462             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 463                 goto nla_put_failure;
 464
 465         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 466                         DBM_TO_MBM(chan->max_power)))
 467                 goto nla_put_failure;
 468
 469         return 0;
 470
 471  nla_put_failure:
 472         return -ENOBUFS;
 473 }
 474
 475 /* netlink command implementations */
 476
 477 struct key_parse {
 478         struct key_params p;
 479         int idx;
 480         int type;
 481         bool def, defmgmt;
 482         bool def_uni, def_multi;
 483 };
 484
 485 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 486 {
 487         struct nlattr *tb[NL80211_KEY_MAX + 1];
 488         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 489                                    nl80211_key_policy);
 490         if (err)
 491                 return err;
 492
 493         k->def = !!tb[NL80211_KEY_DEFAULT];
 494         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 495
 496         if (k->def) {
 497                 k->def_uni = true;
 498                 k->def_multi = true;
 499         }
 500         if (k->defmgmt)
 501                 k->def_multi = true;
 502
 503         if (tb[NL80211_KEY_IDX])
 504                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 505
 506         if (tb[NL80211_KEY_DATA]) {
 507                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 508                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 509         }
 510
 511         if (tb[NL80211_KEY_SEQ]) {
 512                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 513                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 514         }
 515
 516         if (tb[NL80211_KEY_CIPHER])
 517                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 518
 519         if (tb[NL80211_KEY_TYPE]) {
 520                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 521                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 522                         return -EINVAL;
 523         }
 524
 525         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 526                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 527                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 528                                        tb[NL80211_KEY_DEFAULT_TYPES],
 529                                        nl80211_key_default_policy);
 530                 if (err)
 531                         return err;
 532
 533                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 534                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 535         }
 536
 537         return 0;
 538 }
 539
 540 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 541 {
 542         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 543                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 544                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 545         }
 546
 547         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 548                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 549                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 550         }
 551
 552         if (info->attrs[NL80211_ATTR_KEY_IDX])
 553                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 554
 555         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 556                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 557
 558         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 559         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 560
 561         if (k->def) {
 562                 k->def_uni = true;
 563                 k->def_multi = true;
 564         }
 565         if (k->defmgmt)
 566                 k->def_multi = true;
 567
 568         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 569                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 570                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 571                         return -EINVAL;
 572         }
 573
 574         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 575                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 576                 int err = nla_parse_nested(
 577                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 578                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 579                                 nl80211_key_default_policy);
 580                 if (err)
 581                         return err;
 582
 583                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 584                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 585         }
 586
 587         return 0;
 588 }
 589
 590 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 591 {
 592         int err;
 593
 594         memset(k, 0, sizeof(*k));
 595         k->idx = -1;
 596         k->type = -1;
 597
 598         if (info->attrs[NL80211_ATTR_KEY])
 599                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 600         else
 601                 err = nl80211_parse_key_old(info, k);
 602
 603         if (err)
 604                 return err;
 605
 606         if (k->def && k->defmgmt)
 607                 return -EINVAL;
 608
 609         if (k->defmgmt) {
 610                 if (k->def_uni || !k->def_multi)
 611                         return -EINVAL;
 612         }
 613
 614         if (k->idx != -1) {
 615                 if (k->defmgmt) {
 616                         if (k->idx < 4 || k->idx > 5)
 617                                 return -EINVAL;
 618                 } else if (k->def) {
 619                         if (k->idx < 0 || k->idx > 3)
 620                                 return -EINVAL;
 621                 } else {
 622                         if (k->idx < 0 || k->idx > 5)
 623                                 return -EINVAL;
 624                 }
 625         }
 626
 627         return 0;
 628 }
 629
 630 static struct cfg80211_cached_keys *
 631 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 632                        struct nlattr *keys)
 633 {
 634         struct key_parse parse;
 635         struct nlattr *key;
 636         struct cfg80211_cached_keys *result;
 637         int rem, err, def = 0;
 638
 639         result = kzalloc(sizeof(*result), GFP_KERNEL);
 640         if (!result)
 641                 return ERR_PTR(-ENOMEM);
 642
 643         result->def = -1;
 644         result->defmgmt = -1;
 645
 646         nla_for_each_nested(key, keys, rem) {
 647                 memset(&parse, 0, sizeof(parse));
 648                 parse.idx = -1;
 649
 650                 err = nl80211_parse_key_new(key, &parse);
 651                 if (err)
 652                         goto error;
 653                 err = -EINVAL;
 654                 if (!parse.p.key)
 655                         goto error;
 656                 if (parse.idx < 0 || parse.idx > 4)
 657                         goto error;
 658                 if (parse.def) {
 659                         if (def)
 660                                 goto error;
 661                         def = 1;
 662                         result->def = parse.idx;
 663                         if (!parse.def_uni || !parse.def_multi)
 664                                 goto error;
 665                 } else if (parse.defmgmt)
 666                         goto error;
 667                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 668                                                      parse.idx, false, NULL);
 669                 if (err)
 670                         goto error;
 671                 result->params[parse.idx].cipher = parse.p.cipher;
 672                 result->params[parse.idx].key_len = parse.p.key_len;
 673                 result->params[parse.idx].key = result->data[parse.idx];
 674                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 675         }
 676
 677         return result;
 678  error:
 679         kfree(result);
 680         return ERR_PTR(err);
 681 }
 682
 683 static int nl80211_key_allowed(struct wireless_dev *wdev)
 684 {
 685         ASSERT_WDEV_LOCK(wdev);
 686
 687         switch (wdev->iftype) {
 688         case NL80211_IFTYPE_AP:
 689         case NL80211_IFTYPE_AP_VLAN:
 690         case NL80211_IFTYPE_P2P_GO:
 691         case NL80211_IFTYPE_MESH_POINT:
 692                 break;
 693         case NL80211_IFTYPE_ADHOC:
 694                 if (!wdev->current_bss)
 695                         return -ENOLINK;
 696                 break;
 697         case NL80211_IFTYPE_STATION:
 698         case NL80211_IFTYPE_P2P_CLIENT:
 699                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 700                         return -ENOLINK;
 701                 break;
 702         default:
 703                 return -EINVAL;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 710 {
 711         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 712         int i;
 713
 714         if (!nl_modes)
 715                 goto nla_put_failure;
 716
 717         i = 0;
 718         while (ifmodes) {
 719                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 720                         goto nla_put_failure;
 721                 ifmodes >>= 1;
 722                 i++;
 723         }
 724
 725         nla_nest_end(msg, nl_modes);
 726         return 0;
 727
 728 nla_put_failure:
 729         return -ENOBUFS;
 730 }
 731
 732 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 733                                           struct sk_buff *msg)
 734 {
 735         struct nlattr *nl_combis;
 736         int i, j;
 737
 738         nl_combis = nla_nest_start(msg,
 739                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 740         if (!nl_combis)
 741                 goto nla_put_failure;
 742
 743         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 744                 const struct ieee80211_iface_combination *c;
 745                 struct nlattr *nl_combi, *nl_limits;
 746
 747                 c = &wiphy->iface_combinations[i];
 748
 749                 nl_combi = nla_nest_start(msg, i + 1);
 750                 if (!nl_combi)
 751                         goto nla_put_failure;
 752
 753                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 754                 if (!nl_limits)
 755                         goto nla_put_failure;
 756
 757                 for (j = 0; j < c->n_limits; j++) {
 758                         struct nlattr *nl_limit;
 759
 760                         nl_limit = nla_nest_start(msg, j + 1);
 761                         if (!nl_limit)
 762                                 goto nla_put_failure;
 763                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 764                                         c->limits[j].max))
 765                                 goto nla_put_failure;
 766                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 767                                                 c->limits[j].types))
 768                                 goto nla_put_failure;
 769                         nla_nest_end(msg, nl_limit);
 770                 }
 771
 772                 nla_nest_end(msg, nl_limits);
 773
 774                 if (c->beacon_int_infra_match &&
 775                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 776                         goto nla_put_failure;
 777                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 778                                 c->num_different_channels) ||
 779                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 780                                 c->max_interfaces))
 781                         goto nla_put_failure;
 782
 783                 nla_nest_end(msg, nl_combi);
 784         }
 785
 786         nla_nest_end(msg, nl_combis);
 787
 788         return 0;
 789 nla_put_failure:
 790         return -ENOBUFS;
 791 }
 792
 793 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 794                               struct cfg80211_registered_device *dev)
 795 {
 796         void *hdr;
 797         struct nlattr *nl_bands, *nl_band;
 798         struct nlattr *nl_freqs, *nl_freq;
 799         struct nlattr *nl_rates, *nl_rate;
 800         struct nlattr *nl_cmds;
 801         enum ieee80211_band band;
 802         struct ieee80211_channel *chan;
 803         struct ieee80211_rate *rate;
 804         int i;
 805         const struct ieee80211_txrx_stypes *mgmt_stypes =
 806                                 dev->wiphy.mgmt_stypes;
 807
 808         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 809         if (!hdr)
 810                 return -1;
 811
 812         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 813             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 814             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 815                         cfg80211_rdev_list_generation) ||
 816             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 817                        dev->wiphy.retry_short) ||
 818             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 819                        dev->wiphy.retry_long) ||
 820             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 821                         dev->wiphy.frag_threshold) ||
 822             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 823                         dev->wiphy.rts_threshold) ||
 824             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 825                        dev->wiphy.coverage_class) ||
 826             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 827                        dev->wiphy.max_scan_ssids) ||
 828             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 829                        dev->wiphy.max_sched_scan_ssids) ||
 830             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 831                         dev->wiphy.max_scan_ie_len) ||
 832             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 833                         dev->wiphy.max_sched_scan_ie_len) ||
 834             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 835                        dev->wiphy.max_match_sets))
 836                 goto nla_put_failure;
 837
 838         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 839             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 840                 goto nla_put_failure;
 841         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 842             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 843                 goto nla_put_failure;
 844         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 845             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 846                 goto nla_put_failure;
 847         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 848             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 849                 goto nla_put_failure;
 850         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 851             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 852                 goto nla_put_failure;
 853         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 854             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 855                 goto nla_put_failure;
 856
 857         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 858                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 859                     dev->wiphy.cipher_suites))
 860                 goto nla_put_failure;
 861
 862         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 863                        dev->wiphy.max_num_pmkids))
 864                 goto nla_put_failure;
 865
 866         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 867             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 868                 goto nla_put_failure;
 869
 870         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 871                         dev->wiphy.available_antennas_tx) ||
 872             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 873                         dev->wiphy.available_antennas_rx))
 874                 goto nla_put_failure;
 875
 876         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 877             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 878                         dev->wiphy.probe_resp_offload))
 879                 goto nla_put_failure;
 880
 881         if ((dev->wiphy.available_antennas_tx ||
 882              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 883                 u32 tx_ant = 0, rx_ant = 0;
 884                 int res;
 885                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 886                 if (!res) {
 887                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 888                                         tx_ant) ||
 889                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 890                                         rx_ant))
 891                                 goto nla_put_failure;
 892                 }
 893         }
 894
 895         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 896                                 dev->wiphy.interface_modes))
 897                 goto nla_put_failure;
 898
 899         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 900         if (!nl_bands)
 901                 goto nla_put_failure;
 902
 903         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 904                 if (!dev->wiphy.bands[band])
 905                         continue;
 906
 907                 nl_band = nla_nest_start(msg, band);
 908                 if (!nl_band)
 909                         goto nla_put_failure;
 910
 911                 /* add HT info */
 912                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 913                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 914                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 915                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 916                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 917                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 918                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 919                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 920                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 921                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 922                         goto nla_put_failure;
 923
 924                 /* add VHT info */
 925                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
 926                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
 927                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
 928                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
 929                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
 930                                  dev->wiphy.bands[band]->vht_cap.cap)))
 931                         goto nla_put_failure;
 932
 933                 /* add frequencies */
 934                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 935                 if (!nl_freqs)
 936                         goto nla_put_failure;
 937
 938                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 939                         nl_freq = nla_nest_start(msg, i);
 940                         if (!nl_freq)
 941                                 goto nla_put_failure;
 942
 943                         chan = &dev->wiphy.bands[band]->channels[i];
 944
 945                         if (nl80211_msg_put_channel(msg, chan))
 946                                 goto nla_put_failure;
 947
 948                         nla_nest_end(msg, nl_freq);
 949                 }
 950
 951                 nla_nest_end(msg, nl_freqs);
 952
 953                 /* add bitrates */
 954                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 955                 if (!nl_rates)
 956                         goto nla_put_failure;
 957
 958                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 959                         nl_rate = nla_nest_start(msg, i);
 960                         if (!nl_rate)
 961                                 goto nla_put_failure;
 962
 963                         rate = &dev->wiphy.bands[band]->bitrates[i];
 964                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 965                                         rate->bitrate))
 966                                 goto nla_put_failure;
 967                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 968                             nla_put_flag(msg,
 969                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 970                                 goto nla_put_failure;
 971
 972                         nla_nest_end(msg, nl_rate);
 973                 }
 974
 975                 nla_nest_end(msg, nl_rates);
 976
 977                 nla_nest_end(msg, nl_band);
 978         }
 979         nla_nest_end(msg, nl_bands);
 980
 981         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 982         if (!nl_cmds)
 983                 goto nla_put_failure;
 984
 985         i = 0;
 986 #define CMD(op, n)                                              \
 987          do {                                                   \
 988                 if (dev->ops->op) {                             \
 989                         i++;                                    \
 990                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 991                                 goto nla_put_failure;           \
 992                 }                                               \
 993         } while (0)
 994
 995         CMD(add_virtual_intf, NEW_INTERFACE);
 996         CMD(change_virtual_intf, SET_INTERFACE);
 997         CMD(add_key, NEW_KEY);
 998         CMD(start_ap, START_AP);
 999         CMD(add_station, NEW_STATION);
1000         CMD(add_mpath, NEW_MPATH);
1001         CMD(update_mesh_config, SET_MESH_CONFIG);
1002         CMD(change_bss, SET_BSS);
1003         CMD(auth, AUTHENTICATE);
1004         CMD(assoc, ASSOCIATE);
1005         CMD(deauth, DEAUTHENTICATE);
1006         CMD(disassoc, DISASSOCIATE);
1007         CMD(join_ibss, JOIN_IBSS);
1008         CMD(join_mesh, JOIN_MESH);
1009         CMD(set_pmksa, SET_PMKSA);
1010         CMD(del_pmksa, DEL_PMKSA);
1011         CMD(flush_pmksa, FLUSH_PMKSA);
1012         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1013                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1014         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1015         CMD(mgmt_tx, FRAME);
1016         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1017         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1018                 i++;
1019                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1020                         goto nla_put_failure;
1021         }
1022         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1023             dev->ops->join_mesh) {
1024                 i++;
1025                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1026                         goto nla_put_failure;
1027         }
1028         CMD(set_wds_peer, SET_WDS_PEER);
1029         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1030                 CMD(tdls_mgmt, TDLS_MGMT);
1031                 CMD(tdls_oper, TDLS_OPER);
1032         }
1033         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1034                 CMD(sched_scan_start, START_SCHED_SCAN);
1035         CMD(probe_client, PROBE_CLIENT);
1036         CMD(set_noack_map, SET_NOACK_MAP);
1037         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1038                 i++;
1039                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1040                         goto nla_put_failure;
1041         }
1042
1043 #ifdef CONFIG_NL80211_TESTMODE
1044         CMD(testmode_cmd, TESTMODE);
1045 #endif
1046
1047 #undef CMD
1048
1049         if (dev->ops->connect || dev->ops->auth) {
1050                 i++;
1051                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1052                         goto nla_put_failure;
1053         }
1054
1055         if (dev->ops->disconnect || dev->ops->deauth) {
1056                 i++;
1057                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1058                         goto nla_put_failure;
1059         }
1060
1061         nla_nest_end(msg, nl_cmds);
1062
1063         if (dev->ops->remain_on_channel &&
1064             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1065             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1066                         dev->wiphy.max_remain_on_channel_duration))
1067                 goto nla_put_failure;
1068
1069         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1070             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1071                 goto nla_put_failure;
1072
1073         if (mgmt_stypes) {
1074                 u16 stypes;
1075                 struct nlattr *nl_ftypes, *nl_ifs;
1076                 enum nl80211_iftype ift;
1077
1078                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1079                 if (!nl_ifs)
1080                         goto nla_put_failure;
1081
1082                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1083                         nl_ftypes = nla_nest_start(msg, ift);
1084                         if (!nl_ftypes)
1085                                 goto nla_put_failure;
1086                         i = 0;
1087                         stypes = mgmt_stypes[ift].tx;
1088                         while (stypes) {
1089                                 if ((stypes & 1) &&
1090                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1091                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1092                                         goto nla_put_failure;
1093                                 stypes >>= 1;
1094                                 i++;
1095                         }
1096                         nla_nest_end(msg, nl_ftypes);
1097                 }
1098
1099                 nla_nest_end(msg, nl_ifs);
1100
1101                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1102                 if (!nl_ifs)
1103                         goto nla_put_failure;
1104
1105                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1106                         nl_ftypes = nla_nest_start(msg, ift);
1107                         if (!nl_ftypes)
1108                                 goto nla_put_failure;
1109                         i = 0;
1110                         stypes = mgmt_stypes[ift].rx;
1111                         while (stypes) {
1112                                 if ((stypes & 1) &&
1113                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1114                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1115                                         goto nla_put_failure;
1116                                 stypes >>= 1;
1117                                 i++;
1118                         }
1119                         nla_nest_end(msg, nl_ftypes);
1120                 }
1121                 nla_nest_end(msg, nl_ifs);
1122         }
1123
1124 #ifdef CONFIG_PM
1125         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1126                 struct nlattr *nl_wowlan;
1127
1128                 nl_wowlan = nla_nest_start(msg,
1129                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1130                 if (!nl_wowlan)
1131                         goto nla_put_failure;
1132
1133                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1134                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1135                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1136                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1137                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1138                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1139                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1140                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1141                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1142                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1143                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1144                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1145                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1146                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1147                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1148                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1149                     goto nla_put_failure;
1150                 if (dev->wiphy.wowlan.n_patterns) {
1151                         struct nl80211_wowlan_pattern_support pat = {
1152                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1153                                 .min_pattern_len =
1154                                         dev->wiphy.wowlan.pattern_min_len,
1155                                 .max_pattern_len =
1156                                         dev->wiphy.wowlan.pattern_max_len,
1157                         };
1158                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1159                                     sizeof(pat), &pat))
1160                                 goto nla_put_failure;
1161                 }
1162
1163                 nla_nest_end(msg, nl_wowlan);
1164         }
1165 #endif
1166
1167         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1168                                 dev->wiphy.software_iftypes))
1169                 goto nla_put_failure;
1170
1171         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1172                 goto nla_put_failure;
1173
1174         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1175             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1176                         dev->wiphy.ap_sme_capa))
1177                 goto nla_put_failure;
1178
1179         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1180                         dev->wiphy.features))
1181                 goto nla_put_failure;
1182
1183         if (dev->wiphy.ht_capa_mod_mask &&
1184             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1185                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1186                     dev->wiphy.ht_capa_mod_mask))
1187                 goto nla_put_failure;
1188
1189         return genlmsg_end(msg, hdr);
1190
1191  nla_put_failure:
1192         genlmsg_cancel(msg, hdr);
1193         return -EMSGSIZE;
1194 }
1195
1196 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1197 {
1198         int idx = 0;
1199         int start = cb->args[0];
1200         struct cfg80211_registered_device *dev;
1201
1202         mutex_lock(&cfg80211_mutex);
1203         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1204                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1205                         continue;
1206                 if (++idx <= start)
1207                         continue;
1208                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1209                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1210                                        dev) < 0) {
1211                         idx--;
1212                         break;
1213                 }
1214         }
1215         mutex_unlock(&cfg80211_mutex);
1216
1217         cb->args[0] = idx;
1218
1219         return skb->len;
1220 }
1221
1222 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1223 {
1224         struct sk_buff *msg;
1225         struct cfg80211_registered_device *dev = info->user_ptr[0];
1226
1227         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1228         if (!msg)
1229                 return -ENOMEM;
1230
1231         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1232                 nlmsg_free(msg);
1233                 return -ENOBUFS;
1234         }
1235
1236         return genlmsg_reply(msg, info);
1237 }
1238
1239 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1240         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1241         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1242         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1243         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1244         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1245 };
1246
1247 static int parse_txq_params(struct nlattr *tb[],
1248                             struct ieee80211_txq_params *txq_params)
1249 {
1250         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1251             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1252             !tb[NL80211_TXQ_ATTR_AIFS])
1253                 return -EINVAL;
1254
1255         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1256         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1257         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1258         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1259         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1260
1261         if (txq_params->ac >= NL80211_NUM_ACS)
1262                 return -EINVAL;
1263
1264         return 0;
1265 }
1266
1267 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1268 {
1269         /*
1270          * You can only set the channel explicitly for WDS interfaces,
1271          * all others have their channel managed via their respective
1272          * "establish a connection" command (connect, join, ...)
1273          *
1274          * For AP/GO and mesh mode, the channel can be set with the
1275          * channel userspace API, but is only stored and passed to the
1276          * low-level driver when the AP starts or the mesh is joined.
1277          * This is for backward compatibility, userspace can also give
1278          * the channel in the start-ap or join-mesh commands instead.
1279          *
1280          * Monitors are special as they are normally slaved to
1281          * whatever else is going on, so they have their own special
1282          * operation to set the monitor channel if possible.
1283          */
1284         return !wdev ||
1285                 wdev->iftype == NL80211_IFTYPE_AP ||
1286                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1287                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1288                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1289 }
1290
1291 static bool nl80211_valid_channel_type(struct genl_info *info,
1292                                        enum nl80211_channel_type *channel_type)
1293 {
1294         enum nl80211_channel_type tmp;
1295
1296         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1297                 return false;
1298
1299         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1300         if (tmp != NL80211_CHAN_NO_HT &&
1301             tmp != NL80211_CHAN_HT20 &&
1302             tmp != NL80211_CHAN_HT40PLUS &&
1303             tmp != NL80211_CHAN_HT40MINUS)
1304                 return false;
1305
1306         if (channel_type)
1307                 *channel_type = tmp;
1308
1309         return true;
1310 }
1311
1312 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1313                                  struct wireless_dev *wdev,
1314                                  struct genl_info *info)
1315 {
1316         struct ieee80211_channel *channel;
1317         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1318         u32 freq;
1319         int result;
1320         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1321
1322         if (wdev)
1323                 iftype = wdev->iftype;
1324
1325         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1326                 return -EINVAL;
1327
1328         if (!nl80211_can_set_dev_channel(wdev))
1329                 return -EOPNOTSUPP;
1330
1331         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1332             !nl80211_valid_channel_type(info, &channel_type))
1333                 return -EINVAL;
1334
1335         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1336
1337         mutex_lock(&rdev->devlist_mtx);
1338         switch (iftype) {
1339         case NL80211_IFTYPE_AP:
1340         case NL80211_IFTYPE_P2P_GO:
1341                 if (wdev->beacon_interval) {
1342                         result = -EBUSY;
1343                         break;
1344                 }
1345                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1346                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1347                                                               channel,
1348                                                               channel_type)) {
1349                         result = -EINVAL;
1350                         break;
1351                 }
1352                 wdev->preset_chan = channel;
1353                 wdev->preset_chantype = channel_type;
1354                 result = 0;
1355                 break;
1356         case NL80211_IFTYPE_MESH_POINT:
1357                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1358                 break;
1359         case NL80211_IFTYPE_MONITOR:
1360                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1361                 break;
1362         default:
1363                 result = -EINVAL;
1364         }
1365         mutex_unlock(&rdev->devlist_mtx);
1366
1367         return result;
1368 }
1369
1370 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1371 {
1372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1373         struct net_device *netdev = info->user_ptr[1];
1374
1375         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1376 }
1377
1378 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1379 {
1380         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1381         struct net_device *dev = info->user_ptr[1];
1382         struct wireless_dev *wdev = dev->ieee80211_ptr;
1383         const u8 *bssid;
1384
1385         if (!info->attrs[NL80211_ATTR_MAC])
1386                 return -EINVAL;
1387
1388         if (netif_running(dev))
1389                 return -EBUSY;
1390
1391         if (!rdev->ops->set_wds_peer)
1392                 return -EOPNOTSUPP;
1393
1394         if (wdev->iftype != NL80211_IFTYPE_WDS)
1395                 return -EOPNOTSUPP;
1396
1397         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1398         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1399 }
1400
1401
1402 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1403 {
1404         struct cfg80211_registered_device *rdev;
1405         struct net_device *netdev = NULL;
1406         struct wireless_dev *wdev;
1407         int result = 0, rem_txq_params = 0;
1408         struct nlattr *nl_txq_params;
1409         u32 changed;
1410         u8 retry_short = 0, retry_long = 0;
1411         u32 frag_threshold = 0, rts_threshold = 0;
1412         u8 coverage_class = 0;
1413
1414         /*
1415          * Try to find the wiphy and netdev. Normally this
1416          * function shouldn't need the netdev, but this is
1417          * done for backward compatibility -- previously
1418          * setting the channel was done per wiphy, but now
1419          * it is per netdev. Previous userland like hostapd
1420          * also passed a netdev to set_wiphy, so that it is
1421          * possible to let that go to the right netdev!
1422          */
1423         mutex_lock(&cfg80211_mutex);
1424
1425         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1426                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1427
1428                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1429                 if (netdev && netdev->ieee80211_ptr) {
1430                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1431                         mutex_lock(&rdev->mtx);
1432                 } else
1433                         netdev = NULL;
1434         }
1435
1436         if (!netdev) {
1437                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1438                                                   info->attrs);
1439                 if (IS_ERR(rdev)) {
1440                         mutex_unlock(&cfg80211_mutex);
1441                         return PTR_ERR(rdev);
1442                 }
1443                 wdev = NULL;
1444                 netdev = NULL;
1445                 result = 0;
1446
1447                 mutex_lock(&rdev->mtx);
1448         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1449                 wdev = netdev->ieee80211_ptr;
1450         else
1451                 wdev = NULL;
1452
1453         /*
1454          * end workaround code, by now the rdev is available
1455          * and locked, and wdev may or may not be NULL.
1456          */
1457
1458         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1459                 result = cfg80211_dev_rename(
1460                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1461
1462         mutex_unlock(&cfg80211_mutex);
1463
1464         if (result)
1465                 goto bad_res;
1466
1467         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1468                 struct ieee80211_txq_params txq_params;
1469                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1470
1471                 if (!rdev->ops->set_txq_params) {
1472                         result = -EOPNOTSUPP;
1473                         goto bad_res;
1474                 }
1475
1476                 if (!netdev) {
1477                         result = -EINVAL;
1478                         goto bad_res;
1479                 }
1480
1481                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1482                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1483                         result = -EINVAL;
1484                         goto bad_res;
1485                 }
1486
1487                 if (!netif_running(netdev)) {
1488                         result = -ENETDOWN;
1489                         goto bad_res;
1490                 }
1491
1492                 nla_for_each_nested(nl_txq_params,
1493                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1494                                     rem_txq_params) {
1495                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1496                                   nla_data(nl_txq_params),
1497                                   nla_len(nl_txq_params),
1498                                   txq_params_policy);
1499                         result = parse_txq_params(tb, &txq_params);
1500                         if (result)
1501                                 goto bad_res;
1502
1503                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1504                                                            netdev,
1505                                                            &txq_params);
1506                         if (result)
1507                                 goto bad_res;
1508                 }
1509         }
1510
1511         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1512                 result = __nl80211_set_channel(rdev, wdev, info);
1513                 if (result)
1514                         goto bad_res;
1515         }
1516
1517         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1518                 enum nl80211_tx_power_setting type;
1519                 int idx, mbm = 0;
1520
1521                 if (!rdev->ops->set_tx_power) {
1522                         result = -EOPNOTSUPP;
1523                         goto bad_res;
1524                 }
1525
1526                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1527                 type = nla_get_u32(info->attrs[idx]);
1528
1529                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1530                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1531                         result = -EINVAL;
1532                         goto bad_res;
1533                 }
1534
1535                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1536                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1537                         mbm = nla_get_u32(info->attrs[idx]);
1538                 }
1539
1540                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1541                 if (result)
1542                         goto bad_res;
1543         }
1544
1545         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1546             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1547                 u32 tx_ant, rx_ant;
1548                 if ((!rdev->wiphy.available_antennas_tx &&
1549                      !rdev->wiphy.available_antennas_rx) ||
1550                     !rdev->ops->set_antenna) {
1551                         result = -EOPNOTSUPP;
1552                         goto bad_res;
1553                 }
1554
1555                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1556                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1557
1558                 /* reject antenna configurations which don't match the
1559                  * available antenna masks, except for the "all" mask */
1560                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1561                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1562                         result = -EINVAL;
1563                         goto bad_res;
1564                 }
1565
1566                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1567                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1568
1569                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1570                 if (result)
1571                         goto bad_res;
1572         }
1573
1574         changed = 0;
1575
1576         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1577                 retry_short = nla_get_u8(
1578                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1579                 if (retry_short == 0) {
1580                         result = -EINVAL;
1581                         goto bad_res;
1582                 }
1583                 changed |= WIPHY_PARAM_RETRY_SHORT;
1584         }
1585
1586         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1587                 retry_long = nla_get_u8(
1588                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1589                 if (retry_long == 0) {
1590                         result = -EINVAL;
1591                         goto bad_res;
1592                 }
1593                 changed |= WIPHY_PARAM_RETRY_LONG;
1594         }
1595
1596         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1597                 frag_threshold = nla_get_u32(
1598                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1599                 if (frag_threshold < 256) {
1600                         result = -EINVAL;
1601                         goto bad_res;
1602                 }
1603                 if (frag_threshold != (u32) -1) {
1604                         /*
1605                          * Fragments (apart from the last one) are required to
1606                          * have even length. Make the fragmentation code
1607                          * simpler by stripping LSB should someone try to use
1608                          * odd threshold value.
1609                          */
1610                         frag_threshold &= ~0x1;
1611                 }
1612                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1613         }
1614
1615         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1616                 rts_threshold = nla_get_u32(
1617                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1618                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1619         }
1620
1621         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1622                 coverage_class = nla_get_u8(
1623                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1624                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1625         }
1626
1627         if (changed) {
1628                 u8 old_retry_short, old_retry_long;
1629                 u32 old_frag_threshold, old_rts_threshold;
1630                 u8 old_coverage_class;
1631
1632                 if (!rdev->ops->set_wiphy_params) {
1633                         result = -EOPNOTSUPP;
1634                         goto bad_res;
1635                 }
1636
1637                 old_retry_short = rdev->wiphy.retry_short;
1638                 old_retry_long = rdev->wiphy.retry_long;
1639                 old_frag_threshold = rdev->wiphy.frag_threshold;
1640                 old_rts_threshold = rdev->wiphy.rts_threshold;
1641                 old_coverage_class = rdev->wiphy.coverage_class;
1642
1643                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1644                         rdev->wiphy.retry_short = retry_short;
1645                 if (changed & WIPHY_PARAM_RETRY_LONG)
1646                         rdev->wiphy.retry_long = retry_long;
1647                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1648                         rdev->wiphy.frag_threshold = frag_threshold;
1649                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1650                         rdev->wiphy.rts_threshold = rts_threshold;
1651                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1652                         rdev->wiphy.coverage_class = coverage_class;
1653
1654                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1655                 if (result) {
1656                         rdev->wiphy.retry_short = old_retry_short;
1657                         rdev->wiphy.retry_long = old_retry_long;
1658                         rdev->wiphy.frag_threshold = old_frag_threshold;
1659                         rdev->wiphy.rts_threshold = old_rts_threshold;
1660                         rdev->wiphy.coverage_class = old_coverage_class;
1661                 }
1662         }
1663
1664  bad_res:
1665         mutex_unlock(&rdev->mtx);
1666         if (netdev)
1667                 dev_put(netdev);
1668         return result;
1669 }
1670
1671
1672 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1673                               struct cfg80211_registered_device *rdev,
1674                               struct net_device *dev)
1675 {
1676         void *hdr;
1677
1678         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1679         if (!hdr)
1680                 return -1;
1681
1682         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1683             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1684             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1685             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1686                         dev->ieee80211_ptr->iftype) ||
1687             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1688                         rdev->devlist_generation ^
1689                         (cfg80211_rdev_list_generation << 2)))
1690                 goto nla_put_failure;
1691
1692         if (rdev->ops->get_channel) {
1693                 struct ieee80211_channel *chan;
1694                 enum nl80211_channel_type channel_type;
1695
1696                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1697                 if (chan &&
1698                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1699                                     chan->center_freq) ||
1700                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1701                                     channel_type)))
1702                         goto nla_put_failure;
1703         }
1704
1705         return genlmsg_end(msg, hdr);
1706
1707  nla_put_failure:
1708         genlmsg_cancel(msg, hdr);
1709         return -EMSGSIZE;
1710 }
1711
1712 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1713 {
1714         int wp_idx = 0;
1715         int if_idx = 0;
1716         int wp_start = cb->args[0];
1717         int if_start = cb->args[1];
1718         struct cfg80211_registered_device *rdev;
1719         struct wireless_dev *wdev;
1720
1721         mutex_lock(&cfg80211_mutex);
1722         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1723                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1724                         continue;
1725                 if (wp_idx < wp_start) {
1726                         wp_idx++;
1727                         continue;
1728                 }
1729                 if_idx = 0;
1730
1731                 mutex_lock(&rdev->devlist_mtx);
1732                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1733                         if (if_idx < if_start) {
1734                                 if_idx++;
1735                                 continue;
1736                         }
1737                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1738                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1739                                                rdev, wdev->netdev) < 0) {
1740                                 mutex_unlock(&rdev->devlist_mtx);
1741                                 goto out;
1742                         }
1743                         if_idx++;
1744                 }
1745                 mutex_unlock(&rdev->devlist_mtx);
1746
1747                 wp_idx++;
1748         }
1749  out:
1750         mutex_unlock(&cfg80211_mutex);
1751
1752         cb->args[0] = wp_idx;
1753         cb->args[1] = if_idx;
1754
1755         return skb->len;
1756 }
1757
1758 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1759 {
1760         struct sk_buff *msg;
1761         struct cfg80211_registered_device *dev = info->user_ptr[0];
1762         struct net_device *netdev = info->user_ptr[1];
1763
1764         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1765         if (!msg)
1766                 return -ENOMEM;
1767
1768         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1769                                dev, netdev) < 0) {
1770                 nlmsg_free(msg);
1771                 return -ENOBUFS;
1772         }
1773
1774         return genlmsg_reply(msg, info);
1775 }
1776
1777 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1778         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1779         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1780         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1781         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1782         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1783 };
1784
1785 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1786 {
1787         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1788         int flag;
1789
1790         *mntrflags = 0;
1791
1792         if (!nla)
1793                 return -EINVAL;
1794
1795         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1796                              nla, mntr_flags_policy))
1797                 return -EINVAL;
1798
1799         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1800                 if (flags[flag])
1801                         *mntrflags |= (1<<flag);
1802
1803         return 0;
1804 }
1805
1806 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1807                                struct net_device *netdev, u8 use_4addr,
1808                                enum nl80211_iftype iftype)
1809 {
1810         if (!use_4addr) {
1811                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1812                         return -EBUSY;
1813                 return 0;
1814         }
1815
1816         switch (iftype) {
1817         case NL80211_IFTYPE_AP_VLAN:
1818                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1819                         return 0;
1820                 break;
1821         case NL80211_IFTYPE_STATION:
1822                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1823                         return 0;
1824                 break;
1825         default:
1826                 break;
1827         }
1828
1829         return -EOPNOTSUPP;
1830 }
1831
1832 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1833 {
1834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1835         struct vif_params params;
1836         int err;
1837         enum nl80211_iftype otype, ntype;
1838         struct net_device *dev = info->user_ptr[1];
1839         u32 _flags, *flags = NULL;
1840         bool change = false;
1841
1842         memset(&params, 0, sizeof(params));
1843
1844         otype = ntype = dev->ieee80211_ptr->iftype;
1845
1846         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1847                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1848                 if (otype != ntype)
1849                         change = true;
1850                 if (ntype > NL80211_IFTYPE_MAX)
1851                         return -EINVAL;
1852         }
1853
1854         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1855                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1856
1857                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1858                         return -EINVAL;
1859                 if (netif_running(dev))
1860                         return -EBUSY;
1861
1862                 wdev_lock(wdev);
1863                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1864                              IEEE80211_MAX_MESH_ID_LEN);
1865                 wdev->mesh_id_up_len =
1866                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1867                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1868                        wdev->mesh_id_up_len);
1869                 wdev_unlock(wdev);
1870         }
1871
1872         if (info->attrs[NL80211_ATTR_4ADDR]) {
1873                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1874                 change = true;
1875                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1876                 if (err)
1877                         return err;
1878         } else {
1879                 params.use_4addr = -1;
1880         }
1881
1882         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1883                 if (ntype != NL80211_IFTYPE_MONITOR)
1884                         return -EINVAL;
1885                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1886                                           &_flags);
1887                 if (err)
1888                         return err;
1889
1890                 flags = &_flags;
1891                 change = true;
1892         }
1893
1894         if (change)
1895                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1896         else
1897                 err = 0;
1898
1899         if (!err && params.use_4addr != -1)
1900                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1901
1902         return err;
1903 }
1904
1905 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1906 {
1907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1908         struct vif_params params;
1909         struct net_device *dev;
1910         int err;
1911         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1912         u32 flags;
1913
1914         memset(&params, 0, sizeof(params));
1915
1916         if (!info->attrs[NL80211_ATTR_IFNAME])
1917                 return -EINVAL;
1918
1919         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1920                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1921                 if (type > NL80211_IFTYPE_MAX)
1922                         return -EINVAL;
1923         }
1924
1925         if (!rdev->ops->add_virtual_intf ||
1926             !(rdev->wiphy.interface_modes & (1 << type)))
1927                 return -EOPNOTSUPP;
1928
1929         if (info->attrs[NL80211_ATTR_4ADDR]) {
1930                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1931                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1932                 if (err)
1933                         return err;
1934         }
1935
1936         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1937                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1938                                   &flags);
1939         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1940                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1941                 type, err ? NULL : &flags, &params);
1942         if (IS_ERR(dev))
1943                 return PTR_ERR(dev);
1944
1945         if (type == NL80211_IFTYPE_MESH_POINT &&
1946             info->attrs[NL80211_ATTR_MESH_ID]) {
1947                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1948
1949                 wdev_lock(wdev);
1950                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1951                              IEEE80211_MAX_MESH_ID_LEN);
1952                 wdev->mesh_id_up_len =
1953                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1954                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1955                        wdev->mesh_id_up_len);
1956                 wdev_unlock(wdev);
1957         }
1958
1959         return 0;
1960 }
1961
1962 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1963 {
1964         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1965         struct net_device *dev = info->user_ptr[1];
1966
1967         if (!rdev->ops->del_virtual_intf)
1968                 return -EOPNOTSUPP;
1969
1970         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1971 }
1972
1973 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1974 {
1975         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1976         struct net_device *dev = info->user_ptr[1];
1977         u16 noack_map;
1978
1979         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1980                 return -EINVAL;
1981
1982         if (!rdev->ops->set_noack_map)
1983                 return -EOPNOTSUPP;
1984
1985         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1986
1987         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1988 }
1989
1990 struct get_key_cookie {
1991         struct sk_buff *msg;
1992         int error;
1993         int idx;
1994 };
1995
1996 static void get_key_callback(void *c, struct key_params *params)
1997 {
1998         struct nlattr *key;
1999         struct get_key_cookie *cookie = c;
2000
2001         if ((params->key &&
2002              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2003                      params->key_len, params->key)) ||
2004             (params->seq &&
2005              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2006                      params->seq_len, params->seq)) ||
2007             (params->cipher &&
2008              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2009                          params->cipher)))
2010                 goto nla_put_failure;
2011
2012         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2013         if (!key)
2014                 goto nla_put_failure;
2015
2016         if ((params->key &&
2017              nla_put(cookie->msg, NL80211_KEY_DATA,
2018                      params->key_len, params->key)) ||
2019             (params->seq &&
2020              nla_put(cookie->msg, NL80211_KEY_SEQ,
2021                      params->seq_len, params->seq)) ||
2022             (params->cipher &&
2023              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2024                          params->cipher)))
2025                 goto nla_put_failure;
2026
2027         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2028                 goto nla_put_failure;
2029
2030         nla_nest_end(cookie->msg, key);
2031
2032         return;
2033  nla_put_failure:
2034         cookie->error = 1;
2035 }
2036
2037 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2038 {
2039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2040         int err;
2041         struct net_device *dev = info->user_ptr[1];
2042         u8 key_idx = 0;
2043         const u8 *mac_addr = NULL;
2044         bool pairwise;
2045         struct get_key_cookie cookie = {
2046                 .error = 0,
2047         };
2048         void *hdr;
2049         struct sk_buff *msg;
2050
2051         if (info->attrs[NL80211_ATTR_KEY_IDX])
2052                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2053
2054         if (key_idx > 5)
2055                 return -EINVAL;
2056
2057         if (info->attrs[NL80211_ATTR_MAC])
2058                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2059
2060         pairwise = !!mac_addr;
2061         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2062                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2063                 if (kt >= NUM_NL80211_KEYTYPES)
2064                         return -EINVAL;
2065                 if (kt != NL80211_KEYTYPE_GROUP &&
2066                     kt != NL80211_KEYTYPE_PAIRWISE)
2067                         return -EINVAL;
2068                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2069         }
2070
2071         if (!rdev->ops->get_key)
2072                 return -EOPNOTSUPP;
2073
2074         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2075         if (!msg)
2076                 return -ENOMEM;
2077
2078         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2079                              NL80211_CMD_NEW_KEY);
2080         if (IS_ERR(hdr))
2081                 return PTR_ERR(hdr);
2082
2083         cookie.msg = msg;
2084         cookie.idx = key_idx;
2085
2086         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2087             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2088                 goto nla_put_failure;
2089         if (mac_addr &&
2090             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2091                 goto nla_put_failure;
2092
2093         if (pairwise && mac_addr &&
2094             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2095                 return -ENOENT;
2096
2097         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2098                                  mac_addr, &cookie, get_key_callback);
2099
2100         if (err)
2101                 goto free_msg;
2102
2103         if (cookie.error)
2104                 goto nla_put_failure;
2105
2106         genlmsg_end(msg, hdr);
2107         return genlmsg_reply(msg, info);
2108
2109  nla_put_failure:
2110         err = -ENOBUFS;
2111  free_msg:
2112         nlmsg_free(msg);
2113         return err;
2114 }
2115
2116 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2117 {
2118         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2119         struct key_parse key;
2120         int err;
2121         struct net_device *dev = info->user_ptr[1];
2122
2123         err = nl80211_parse_key(info, &key);
2124         if (err)
2125                 return err;
2126
2127         if (key.idx < 0)
2128                 return -EINVAL;
2129
2130         /* only support setting default key */
2131         if (!key.def && !key.defmgmt)
2132                 return -EINVAL;
2133
2134         wdev_lock(dev->ieee80211_ptr);
2135
2136         if (key.def) {
2137                 if (!rdev->ops->set_default_key) {
2138                         err = -EOPNOTSUPP;
2139                         goto out;
2140                 }
2141
2142                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2143                 if (err)
2144                         goto out;
2145
2146                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2147                                                  key.def_uni, key.def_multi);
2148
2149                 if (err)
2150                         goto out;
2151
2152 #ifdef CONFIG_CFG80211_WEXT
2153                 dev->ieee80211_ptr->wext.default_key = key.idx;
2154 #endif
2155         } else {
2156                 if (key.def_uni || !key.def_multi) {
2157                         err = -EINVAL;
2158                         goto out;
2159                 }
2160
2161                 if (!rdev->ops->set_default_mgmt_key) {
2162                         err = -EOPNOTSUPP;
2163                         goto out;
2164                 }
2165
2166                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2167                 if (err)
2168                         goto out;
2169
2170                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2171                                                       dev, key.idx);
2172                 if (err)
2173                         goto out;
2174
2175 #ifdef CONFIG_CFG80211_WEXT
2176                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2177 #endif
2178         }
2179
2180  out:
2181         wdev_unlock(dev->ieee80211_ptr);
2182
2183         return err;
2184 }
2185
2186 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2187 {
2188         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2189         int err;
2190         struct net_device *dev = info->user_ptr[1];
2191         struct key_parse key;
2192         const u8 *mac_addr = NULL;
2193
2194         err = nl80211_parse_key(info, &key);
2195         if (err)
2196                 return err;
2197
2198         if (!key.p.key)
2199                 return -EINVAL;
2200
2201         if (info->attrs[NL80211_ATTR_MAC])
2202                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2203
2204         if (key.type == -1) {
2205                 if (mac_addr)
2206                         key.type = NL80211_KEYTYPE_PAIRWISE;
2207                 else
2208                         key.type = NL80211_KEYTYPE_GROUP;
2209         }
2210
2211         /* for now */
2212         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2213             key.type != NL80211_KEYTYPE_GROUP)
2214                 return -EINVAL;
2215
2216         if (!rdev->ops->add_key)
2217                 return -EOPNOTSUPP;
2218
2219         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2220                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2221                                            mac_addr))
2222                 return -EINVAL;
2223
2224         wdev_lock(dev->ieee80211_ptr);
2225         err = nl80211_key_allowed(dev->ieee80211_ptr);
2226         if (!err)
2227                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2228                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2229                                          mac_addr, &key.p);
2230         wdev_unlock(dev->ieee80211_ptr);
2231
2232         return err;
2233 }
2234
2235 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2236 {
2237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2238         int err;
2239         struct net_device *dev = info->user_ptr[1];
2240         u8 *mac_addr = NULL;
2241         struct key_parse key;
2242
2243         err = nl80211_parse_key(info, &key);
2244         if (err)
2245                 return err;
2246
2247         if (info->attrs[NL80211_ATTR_MAC])
2248                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2249
2250         if (key.type == -1) {
2251                 if (mac_addr)
2252                         key.type = NL80211_KEYTYPE_PAIRWISE;
2253                 else
2254                         key.type = NL80211_KEYTYPE_GROUP;
2255         }
2256
2257         /* for now */
2258         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2259             key.type != NL80211_KEYTYPE_GROUP)
2260                 return -EINVAL;
2261
2262         if (!rdev->ops->del_key)
2263                 return -EOPNOTSUPP;
2264
2265         wdev_lock(dev->ieee80211_ptr);
2266         err = nl80211_key_allowed(dev->ieee80211_ptr);
2267
2268         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2269             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2270                 err = -ENOENT;
2271
2272         if (!err)
2273                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2274                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2275                                          mac_addr);
2276
2277 #ifdef CONFIG_CFG80211_WEXT
2278         if (!err) {
2279                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2280                         dev->ieee80211_ptr->wext.default_key = -1;
2281                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2282                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2283         }
2284 #endif
2285         wdev_unlock(dev->ieee80211_ptr);
2286
2287         return err;
2288 }
2289
2290 static int nl80211_parse_beacon(struct genl_info *info,
2291                                 struct cfg80211_beacon_data *bcn)
2292 {
2293         bool haveinfo = false;
2294
2295         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2296             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2297             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2298             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2299                 return -EINVAL;
2300
2301         memset(bcn, 0, sizeof(*bcn));
2302
2303         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2304                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2305                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2306                 if (!bcn->head_len)
2307                         return -EINVAL;
2308                 haveinfo = true;
2309         }
2310
2311         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2312                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2313                 bcn->tail_len =
2314                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2315                 haveinfo = true;
2316         }
2317
2318         if (!haveinfo)
2319                 return -EINVAL;
2320
2321         if (info->attrs[NL80211_ATTR_IE]) {
2322                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2323                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2324         }
2325
2326         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2327                 bcn->proberesp_ies =
2328                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2329                 bcn->proberesp_ies_len =
2330                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2331         }
2332
2333         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2334                 bcn->assocresp_ies =
2335                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2336                 bcn->assocresp_ies_len =
2337                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2338         }
2339
2340         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2341                 bcn->probe_resp =
2342                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2343                 bcn->probe_resp_len =
2344                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2345         }
2346
2347         return 0;
2348 }
2349
2350 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2351                                    struct cfg80211_ap_settings *params)
2352 {
2353         struct wireless_dev *wdev;
2354         bool ret = false;
2355
2356         mutex_lock(&rdev->devlist_mtx);
2357
2358         list_for_each_entry(wdev, &rdev->netdev_list, list) {
2359                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2360                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2361                         continue;
2362
2363                 if (!wdev->preset_chan)
2364                         continue;
2365
2366                 params->channel = wdev->preset_chan;
2367                 params->channel_type = wdev->preset_chantype;
2368                 ret = true;
2369                 break;
2370         }
2371
2372         mutex_unlock(&rdev->devlist_mtx);
2373
2374         return ret;
2375 }
2376
2377 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2378 {
2379         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2380         struct net_device *dev = info->user_ptr[1];
2381         struct wireless_dev *wdev = dev->ieee80211_ptr;
2382         struct cfg80211_ap_settings params;
2383         int err;
2384
2385         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2386             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2387                 return -EOPNOTSUPP;
2388
2389         if (!rdev->ops->start_ap)
2390                 return -EOPNOTSUPP;
2391
2392         if (wdev->beacon_interval)
2393                 return -EALREADY;
2394
2395         memset(&params, 0, sizeof(params));
2396
2397         /* these are required for START_AP */
2398         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2399             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2400             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2401                 return -EINVAL;
2402
2403         err = nl80211_parse_beacon(info, &params.beacon);
2404         if (err)
2405                 return err;
2406
2407         params.beacon_interval =
2408                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2409         params.dtim_period =
2410                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2411
2412         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2413         if (err)
2414                 return err;
2415
2416         /*
2417          * In theory, some of these attributes should be required here
2418          * but since they were not used when the command was originally
2419          * added, keep them optional for old user space programs to let
2420          * them continue to work with drivers that do not need the
2421          * additional information -- drivers must check!
2422          */
2423         if (info->attrs[NL80211_ATTR_SSID]) {
2424                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2425                 params.ssid_len =
2426                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2427                 if (params.ssid_len == 0 ||
2428                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2429                         return -EINVAL;
2430         }
2431
2432         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2433                 params.hidden_ssid = nla_get_u32(
2434                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2435                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2436                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2437                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2438                         return -EINVAL;
2439         }
2440
2441         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2442
2443         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2444                 params.auth_type = nla_get_u32(
2445                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2446                 if (!nl80211_valid_auth_type(params.auth_type))
2447                         return -EINVAL;
2448         } else
2449                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2450
2451         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2452                                       NL80211_MAX_NR_CIPHER_SUITES);
2453         if (err)
2454                 return err;
2455
2456         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2457                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2458                         return -EOPNOTSUPP;
2459                 params.inactivity_timeout = nla_get_u16(
2460                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2461         }
2462
2463         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2464                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2465
2466                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2467                     !nl80211_valid_channel_type(info, &channel_type))
2468                         return -EINVAL;
2469
2470                 params.channel = rdev_freq_to_chan(rdev,
2471                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2472                         channel_type);
2473                 if (!params.channel)
2474                         return -EINVAL;
2475                 params.channel_type = channel_type;
2476         } else if (wdev->preset_chan) {
2477                 params.channel = wdev->preset_chan;
2478                 params.channel_type = wdev->preset_chantype;
2479         } else if (!nl80211_get_ap_channel(rdev, &params))
2480                 return -EINVAL;
2481
2482         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2483                                           params.channel_type))
2484                 return -EINVAL;
2485
2486         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2487         if (!err) {
2488                 wdev->preset_chan = params.channel;
2489                 wdev->preset_chantype = params.channel_type;
2490                 wdev->beacon_interval = params.beacon_interval;
2491         }
2492         return err;
2493 }
2494
2495 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2496 {
2497         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2498         struct net_device *dev = info->user_ptr[1];
2499         struct wireless_dev *wdev = dev->ieee80211_ptr;
2500         struct cfg80211_beacon_data params;
2501         int err;
2502
2503         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2504             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2505                 return -EOPNOTSUPP;
2506
2507         if (!rdev->ops->change_beacon)
2508                 return -EOPNOTSUPP;
2509
2510         if (!wdev->beacon_interval)
2511                 return -EINVAL;
2512
2513         err = nl80211_parse_beacon(info, &params);
2514         if (err)
2515                 return err;
2516
2517         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2518 }
2519
2520 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2521 {
2522         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2523         struct net_device *dev = info->user_ptr[1];
2524
2525         return cfg80211_stop_ap(rdev, dev);
2526 }
2527
2528 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2529         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2530         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2531         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2532         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2533         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2534         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2535 };
2536
2537 static int parse_station_flags(struct genl_info *info,
2538                                enum nl80211_iftype iftype,
2539                                struct station_parameters *params)
2540 {
2541         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2542         struct nlattr *nla;
2543         int flag;
2544
2545         /*
2546          * Try parsing the new attribute first so userspace
2547          * can specify both for older kernels.
2548          */
2549         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2550         if (nla) {
2551                 struct nl80211_sta_flag_update *sta_flags;
2552
2553                 sta_flags = nla_data(nla);
2554                 params->sta_flags_mask = sta_flags->mask;
2555                 params->sta_flags_set = sta_flags->set;
2556                 if ((params->sta_flags_mask |
2557                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2558                         return -EINVAL;
2559                 return 0;
2560         }
2561
2562         /* if present, parse the old attribute */
2563
2564         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2565         if (!nla)
2566                 return 0;
2567
2568         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2569                              nla, sta_flags_policy))
2570                 return -EINVAL;
2571
2572         /*
2573          * Only allow certain flags for interface types so that
2574          * other attributes are silently ignored. Remember that
2575          * this is backward compatibility code with old userspace
2576          * and shouldn't be hit in other cases anyway.
2577          */
2578         switch (iftype) {
2579         case NL80211_IFTYPE_AP:
2580         case NL80211_IFTYPE_AP_VLAN:
2581         case NL80211_IFTYPE_P2P_GO:
2582                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2583                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2584                                          BIT(NL80211_STA_FLAG_WME) |
2585                                          BIT(NL80211_STA_FLAG_MFP);
2586                 break;
2587         case NL80211_IFTYPE_P2P_CLIENT:
2588         case NL80211_IFTYPE_STATION:
2589                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2590                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2591                 break;
2592         case NL80211_IFTYPE_MESH_POINT:
2593                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2594                                          BIT(NL80211_STA_FLAG_MFP) |
2595                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2596         default:
2597                 return -EINVAL;
2598         }
2599
2600         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2601                 if (flags[flag]) {
2602                         params->sta_flags_set |= (1<<flag);
2603
2604                         /* no longer support new API additions in old API */
2605                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2606                                 return -EINVAL;
2607                 }
2608         }
2609
2610         return 0;
2611 }
2612
2613 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2614                                  int attr)
2615 {
2616         struct nlattr *rate;
2617         u16 bitrate;
2618
2619         rate = nla_nest_start(msg, attr);
2620         if (!rate)
2621                 goto nla_put_failure;
2622
2623         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2624         bitrate = cfg80211_calculate_bitrate(info);
2625         if ((bitrate > 0 &&
2626              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2627             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2628              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2629             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2630              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2631             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2632              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2633                 goto nla_put_failure;
2634
2635         nla_nest_end(msg, rate);
2636         return true;
2637
2638 nla_put_failure:
2639         return false;
2640 }
2641
2642 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2643                                 int flags,
2644                                 struct cfg80211_registered_device *rdev,
2645                                 struct net_device *dev,
2646                                 const u8 *mac_addr, struct station_info *sinfo)
2647 {
2648         void *hdr;
2649         struct nlattr *sinfoattr, *bss_param;
2650
2651         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2652         if (!hdr)
2653                 return -1;
2654
2655         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2656             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2657             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2658                 goto nla_put_failure;
2659
2660         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2661         if (!sinfoattr)
2662                 goto nla_put_failure;
2663         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2664             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2665                         sinfo->connected_time))
2666                 goto nla_put_failure;
2667         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2668             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2669                         sinfo->inactive_time))
2670                 goto nla_put_failure;
2671         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2672             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2673                         sinfo->rx_bytes))
2674                 goto nla_put_failure;
2675         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2676             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2677                         sinfo->tx_bytes))
2678                 goto nla_put_failure;
2679         if ((sinfo->filled & STATION_INFO_LLID) &&
2680             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2681                 goto nla_put_failure;
2682         if ((sinfo->filled & STATION_INFO_PLID) &&
2683             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2684                 goto nla_put_failure;
2685         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2686             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2687                        sinfo->plink_state))
2688                 goto nla_put_failure;
2689         switch (rdev->wiphy.signal_type) {
2690         case CFG80211_SIGNAL_TYPE_MBM:
2691                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2692                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2693                                sinfo->signal))
2694                         goto nla_put_failure;
2695                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2696                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2697                                sinfo->signal_avg))
2698                         goto nla_put_failure;
2699                 break;
2700         default:
2701                 break;
2702         }
2703         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2704                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2705                                           NL80211_STA_INFO_TX_BITRATE))
2706                         goto nla_put_failure;
2707         }
2708         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2709                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2710                                           NL80211_STA_INFO_RX_BITRATE))
2711                         goto nla_put_failure;
2712         }
2713         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2714             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2715                         sinfo->rx_packets))
2716                 goto nla_put_failure;
2717         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2718             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2719                         sinfo->tx_packets))
2720                 goto nla_put_failure;
2721         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2722             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2723                         sinfo->tx_retries))
2724                 goto nla_put_failure;
2725         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2726             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2727                         sinfo->tx_failed))
2728                 goto nla_put_failure;
2729         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2730             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2731                         sinfo->beacon_loss_count))
2732                 goto nla_put_failure;
2733         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2734                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2735                 if (!bss_param)
2736                         goto nla_put_failure;
2737
2738                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2739                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2740                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2741                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2742                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2743                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2744                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2745                                sinfo->bss_param.dtim_period) ||
2746                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2747                                 sinfo->bss_param.beacon_interval))
2748                         goto nla_put_failure;
2749
2750                 nla_nest_end(msg, bss_param);
2751         }
2752         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2753             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2754                     sizeof(struct nl80211_sta_flag_update),
2755                     &sinfo->sta_flags))
2756                 goto nla_put_failure;
2757         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2758                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2759                             sinfo->t_offset))
2760                 goto nla_put_failure;
2761         nla_nest_end(msg, sinfoattr);
2762
2763         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2764             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2765                     sinfo->assoc_req_ies))
2766                 goto nla_put_failure;
2767
2768         return genlmsg_end(msg, hdr);
2769
2770  nla_put_failure:
2771         genlmsg_cancel(msg, hdr);
2772         return -EMSGSIZE;
2773 }
2774
2775 static int nl80211_dump_station(struct sk_buff *skb,
2776                                 struct netlink_callback *cb)
2777 {
2778         struct station_info sinfo;
2779         struct cfg80211_registered_device *dev;
2780         struct net_device *netdev;
2781         u8 mac_addr[ETH_ALEN];
2782         int sta_idx = cb->args[1];
2783         int err;
2784
2785         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2786         if (err)
2787                 return err;
2788
2789         if (!dev->ops->dump_station) {
2790                 err = -EOPNOTSUPP;
2791                 goto out_err;
2792         }
2793
2794         while (1) {
2795                 memset(&sinfo, 0, sizeof(sinfo));
2796                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2797                                              mac_addr, &sinfo);
2798                 if (err == -ENOENT)
2799                         break;
2800                 if (err)
2801                         goto out_err;
2802
2803                 if (nl80211_send_station(skb,
2804                                 NETLINK_CB(cb->skb).pid,
2805                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2806                                 dev, netdev, mac_addr,
2807                                 &sinfo) < 0)
2808                         goto out;
2809
2810                 sta_idx++;
2811         }
2812
2813
2814  out:
2815         cb->args[1] = sta_idx;
2816         err = skb->len;
2817  out_err:
2818         nl80211_finish_netdev_dump(dev);
2819
2820         return err;
2821 }
2822
2823 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2824 {
2825         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2826         struct net_device *dev = info->user_ptr[1];
2827         struct station_info sinfo;
2828         struct sk_buff *msg;
2829         u8 *mac_addr = NULL;
2830         int err;
2831
2832         memset(&sinfo, 0, sizeof(sinfo));
2833
2834         if (!info->attrs[NL80211_ATTR_MAC])
2835                 return -EINVAL;
2836
2837         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2838
2839         if (!rdev->ops->get_station)
2840                 return -EOPNOTSUPP;
2841
2842         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2843         if (err)
2844                 return err;
2845
2846         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2847         if (!msg)
2848                 return -ENOMEM;
2849
2850         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2851                                  rdev, dev, mac_addr, &sinfo) < 0) {
2852                 nlmsg_free(msg);
2853                 return -ENOBUFS;
2854         }
2855
2856         return genlmsg_reply(msg, info);
2857 }
2858
2859 /*
2860  * Get vlan interface making sure it is running and on the right wiphy.
2861  */
2862 static struct net_device *get_vlan(struct genl_info *info,
2863                                    struct cfg80211_registered_device *rdev)
2864 {
2865         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2866         struct net_device *v;
2867         int ret;
2868
2869         if (!vlanattr)
2870                 return NULL;
2871
2872         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2873         if (!v)
2874                 return ERR_PTR(-ENODEV);
2875
2876         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2877                 ret = -EINVAL;
2878                 goto error;
2879         }
2880
2881         if (!netif_running(v)) {
2882                 ret = -ENETDOWN;
2883                 goto error;
2884         }
2885
2886         return v;
2887  error:
2888         dev_put(v);
2889         return ERR_PTR(ret);
2890 }
2891
2892 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2893 {
2894         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2895         int err;
2896         struct net_device *dev = info->user_ptr[1];
2897         struct station_parameters params;
2898         u8 *mac_addr = NULL;
2899
2900         memset(&params, 0, sizeof(params));
2901
2902         params.listen_interval = -1;
2903         params.plink_state = -1;
2904
2905         if (info->attrs[NL80211_ATTR_STA_AID])
2906                 return -EINVAL;
2907
2908         if (!info->attrs[NL80211_ATTR_MAC])
2909                 return -EINVAL;
2910
2911         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2912
2913         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2914                 params.supported_rates =
2915                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2916                 params.supported_rates_len =
2917                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2918         }
2919
2920         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2921                 params.listen_interval =
2922                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2923
2924         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2925                 params.ht_capa =
2926                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2927
2928         if (!rdev->ops->change_station)
2929                 return -EOPNOTSUPP;
2930
2931         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2932                 return -EINVAL;
2933
2934         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2935                 params.plink_action =
2936                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2937
2938         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2939                 params.plink_state =
2940                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2941
2942         switch (dev->ieee80211_ptr->iftype) {
2943         case NL80211_IFTYPE_AP:
2944         case NL80211_IFTYPE_AP_VLAN:
2945         case NL80211_IFTYPE_P2P_GO:
2946                 /* disallow mesh-specific things */
2947                 if (params.plink_action)
2948                         return -EINVAL;
2949
2950                 /* TDLS can't be set, ... */
2951                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2952                         return -EINVAL;
2953                 /*
2954                  * ... but don't bother the driver with it. This works around
2955                  * a hostapd/wpa_supplicant issue -- it always includes the
2956                  * TLDS_PEER flag in the mask even for AP mode.
2957                  */
2958                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2959
2960                 /* accept only the listed bits */
2961                 if (params.sta_flags_mask &
2962                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2963                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2964                                   BIT(NL80211_STA_FLAG_WME) |
2965                                   BIT(NL80211_STA_FLAG_MFP)))
2966                         return -EINVAL;
2967
2968                 /* must be last in here for error handling */
2969                 params.vlan = get_vlan(info, rdev);
2970                 if (IS_ERR(params.vlan))
2971                         return PTR_ERR(params.vlan);
2972                 break;
2973         case NL80211_IFTYPE_P2P_CLIENT:
2974         case NL80211_IFTYPE_STATION:
2975                 /*
2976                  * Don't allow userspace to change the TDLS_PEER flag,
2977                  * but silently ignore attempts to change it since we
2978                  * don't have state here to verify that it doesn't try
2979                  * to change the flag.
2980                  */
2981                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2982                 /* fall through */
2983         case NL80211_IFTYPE_ADHOC:
2984                 /* disallow things sta doesn't support */
2985                 if (params.plink_action)
2986                         return -EINVAL;
2987                 if (params.ht_capa)
2988                         return -EINVAL;
2989                 if (params.listen_interval >= 0)
2990                         return -EINVAL;
2991                 /* reject any changes other than AUTHORIZED */
2992                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2993                         return -EINVAL;
2994                 break;
2995         case NL80211_IFTYPE_MESH_POINT:
2996                 /* disallow things mesh doesn't support */
2997                 if (params.vlan)
2998                         return -EINVAL;
2999                 if (params.ht_capa)
3000                         return -EINVAL;
3001                 if (params.listen_interval >= 0)
3002                         return -EINVAL;
3003                 /*
3004                  * No special handling for TDLS here -- the userspace
3005                  * mesh code doesn't have this bug.
3006                  */
3007                 if (params.sta_flags_mask &
3008                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3009                                   BIT(NL80211_STA_FLAG_MFP) |
3010                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3011                         return -EINVAL;
3012                 break;
3013         default:
3014                 return -EOPNOTSUPP;
3015         }
3016
3017         /* be aware of params.vlan when changing code here */
3018
3019         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3020
3021         if (params.vlan)
3022                 dev_put(params.vlan);
3023
3024         return err;
3025 }
3026
3027 static struct nla_policy
3028 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3029         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3030         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3031 };
3032
3033 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3034 {
3035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3036         int err;
3037         struct net_device *dev = info->user_ptr[1];
3038         struct station_parameters params;
3039         u8 *mac_addr = NULL;
3040
3041         memset(&params, 0, sizeof(params));
3042
3043         if (!info->attrs[NL80211_ATTR_MAC])
3044                 return -EINVAL;
3045
3046         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3047                 return -EINVAL;
3048
3049         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3050                 return -EINVAL;
3051
3052         if (!info->attrs[NL80211_ATTR_STA_AID])
3053                 return -EINVAL;
3054
3055         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3056         params.supported_rates =
3057                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3058         params.supported_rates_len =
3059                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3060         params.listen_interval =
3061                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3062
3063         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3064         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3065                 return -EINVAL;
3066
3067         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3068                 params.ht_capa =
3069                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3070
3071         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3072                 params.plink_action =
3073                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3074
3075         if (!rdev->ops->add_station)
3076                 return -EOPNOTSUPP;
3077
3078         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3079                 return -EINVAL;
3080
3081         switch (dev->ieee80211_ptr->iftype) {
3082         case NL80211_IFTYPE_AP:
3083         case NL80211_IFTYPE_AP_VLAN:
3084         case NL80211_IFTYPE_P2P_GO:
3085                 /* parse WME attributes if sta is WME capable */
3086                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3087                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3088                     info->attrs[NL80211_ATTR_STA_WME]) {
3089                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3090                         struct nlattr *nla;
3091
3092                         nla = info->attrs[NL80211_ATTR_STA_WME];
3093                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3094                                                nl80211_sta_wme_policy);
3095                         if (err)
3096                                 return err;
3097
3098                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3099                                 params.uapsd_queues =
3100                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3101                         if (params.uapsd_queues &
3102                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3103                                 return -EINVAL;
3104
3105                         if (tb[NL80211_STA_WME_MAX_SP])
3106                                 params.max_sp =
3107                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3108
3109                         if (params.max_sp &
3110                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3111                                 return -EINVAL;
3112
3113                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3114                 }
3115                 /* TDLS peers cannot be added */
3116                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3117                         return -EINVAL;
3118                 /* but don't bother the driver with it */
3119                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3120
3121                 /* must be last in here for error handling */
3122                 params.vlan = get_vlan(info, rdev);
3123                 if (IS_ERR(params.vlan))
3124                         return PTR_ERR(params.vlan);
3125                 break;
3126         case NL80211_IFTYPE_MESH_POINT:
3127                 /* TDLS peers cannot be added */
3128                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3129                         return -EINVAL;
3130                 break;
3131         case NL80211_IFTYPE_STATION:
3132                 /* Only TDLS peers can be added */
3133                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3134                         return -EINVAL;
3135                 /* Can only add if TDLS ... */
3136                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3137                         return -EOPNOTSUPP;
3138                 /* ... with external setup is supported */
3139                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3140                         return -EOPNOTSUPP;
3141                 break;
3142         default:
3143                 return -EOPNOTSUPP;
3144         }
3145
3146         /* be aware of params.vlan when changing code here */
3147
3148         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3149
3150         if (params.vlan)
3151                 dev_put(params.vlan);
3152         return err;
3153 }
3154
3155 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3156 {
3157         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3158         struct net_device *dev = info->user_ptr[1];
3159         u8 *mac_addr = NULL;
3160
3161         if (info->attrs[NL80211_ATTR_MAC])
3162                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3163
3164         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3165             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3166             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3167             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3168                 return -EINVAL;
3169
3170         if (!rdev->ops->del_station)
3171                 return -EOPNOTSUPP;
3172
3173         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3174 }
3175
3176 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3177                                 int flags, struct net_device *dev,
3178                                 u8 *dst, u8 *next_hop,
3179                                 struct mpath_info *pinfo)
3180 {
3181         void *hdr;
3182         struct nlattr *pinfoattr;
3183
3184         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3185         if (!hdr)
3186                 return -1;
3187
3188         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3189             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3190             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3191             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3192                 goto nla_put_failure;
3193
3194         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3195         if (!pinfoattr)
3196                 goto nla_put_failure;
3197         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3198             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3199                         pinfo->frame_qlen))
3200                 goto nla_put_failure;
3201         if (((pinfo->filled & MPATH_INFO_SN) &&
3202              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3203             ((pinfo->filled & MPATH_INFO_METRIC) &&
3204              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3205                          pinfo->metric)) ||
3206             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3207              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3208                          pinfo->exptime)) ||
3209             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3210              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3211                         pinfo->flags)) ||
3212             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3213              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3214                          pinfo->discovery_timeout)) ||
3215             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3216              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3217                         pinfo->discovery_retries)))
3218                 goto nla_put_failure;
3219
3220         nla_nest_end(msg, pinfoattr);
3221
3222         return genlmsg_end(msg, hdr);
3223
3224  nla_put_failure:
3225         genlmsg_cancel(msg, hdr);
3226         return -EMSGSIZE;
3227 }
3228
3229 static int nl80211_dump_mpath(struct sk_buff *skb,
3230                               struct netlink_callback *cb)
3231 {
3232         struct mpath_info pinfo;
3233         struct cfg80211_registered_device *dev;
3234         struct net_device *netdev;
3235         u8 dst[ETH_ALEN];
3236         u8 next_hop[ETH_ALEN];
3237         int path_idx = cb->args[1];
3238         int err;
3239
3240         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3241         if (err)
3242                 return err;
3243
3244         if (!dev->ops->dump_mpath) {
3245                 err = -EOPNOTSUPP;
3246                 goto out_err;
3247         }
3248
3249         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3250                 err = -EOPNOTSUPP;
3251                 goto out_err;
3252         }
3253
3254         while (1) {
3255                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3256                                            dst, next_hop, &pinfo);
3257                 if (err == -ENOENT)
3258                         break;
3259                 if (err)
3260                         goto out_err;
3261
3262                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3263                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3264                                        netdev, dst, next_hop,
3265                                        &pinfo) < 0)
3266                         goto out;
3267
3268                 path_idx++;
3269         }
3270
3271
3272  out:
3273         cb->args[1] = path_idx;
3274         err = skb->len;
3275  out_err:
3276         nl80211_finish_netdev_dump(dev);
3277         return err;
3278 }
3279
3280 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3281 {
3282         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3283         int err;
3284         struct net_device *dev = info->user_ptr[1];
3285         struct mpath_info pinfo;
3286         struct sk_buff *msg;
3287         u8 *dst = NULL;
3288         u8 next_hop[ETH_ALEN];
3289
3290         memset(&pinfo, 0, sizeof(pinfo));
3291
3292         if (!info->attrs[NL80211_ATTR_MAC])
3293                 return -EINVAL;
3294
3295         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3296
3297         if (!rdev->ops->get_mpath)
3298                 return -EOPNOTSUPP;
3299
3300         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3301                 return -EOPNOTSUPP;
3302
3303         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3304         if (err)
3305                 return err;
3306
3307         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3308         if (!msg)
3309                 return -ENOMEM;
3310
3311         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3312                                  dev, dst, next_hop, &pinfo) < 0) {
3313                 nlmsg_free(msg);
3314                 return -ENOBUFS;
3315         }
3316
3317         return genlmsg_reply(msg, info);
3318 }
3319
3320 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3321 {
3322         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3323         struct net_device *dev = info->user_ptr[1];
3324         u8 *dst = NULL;
3325         u8 *next_hop = NULL;
3326
3327         if (!info->attrs[NL80211_ATTR_MAC])
3328                 return -EINVAL;
3329
3330         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3331                 return -EINVAL;
3332
3333         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3334         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3335
3336         if (!rdev->ops->change_mpath)
3337                 return -EOPNOTSUPP;
3338
3339         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3340                 return -EOPNOTSUPP;
3341
3342         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3343 }
3344
3345 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3346 {
3347         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3348         struct net_device *dev = info->user_ptr[1];
3349         u8 *dst = NULL;
3350         u8 *next_hop = NULL;
3351
3352         if (!info->attrs[NL80211_ATTR_MAC])
3353                 return -EINVAL;
3354
3355         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3356                 return -EINVAL;
3357
3358         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3359         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3360
3361         if (!rdev->ops->add_mpath)
3362                 return -EOPNOTSUPP;
3363
3364         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3365                 return -EOPNOTSUPP;
3366
3367         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3368 }
3369
3370 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3371 {
3372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3373         struct net_device *dev = info->user_ptr[1];
3374         u8 *dst = NULL;
3375
3376         if (info->attrs[NL80211_ATTR_MAC])
3377                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3378
3379         if (!rdev->ops->del_mpath)
3380                 return -EOPNOTSUPP;
3381
3382         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3383 }
3384
3385 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3386 {
3387         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3388         struct net_device *dev = info->user_ptr[1];
3389         struct bss_parameters params;
3390
3391         memset(&params, 0, sizeof(params));
3392         /* default to not changing parameters */
3393         params.use_cts_prot = -1;
3394         params.use_short_preamble = -1;
3395         params.use_short_slot_time = -1;
3396         params.ap_isolate = -1;
3397         params.ht_opmode = -1;
3398
3399         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3400                 params.use_cts_prot =
3401                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3402         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3403                 params.use_short_preamble =
3404                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3405         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3406                 params.use_short_slot_time =
3407                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3408         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3409                 params.basic_rates =
3410                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3411                 params.basic_rates_len =
3412                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3413         }
3414         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3415                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3416         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3417                 params.ht_opmode =
3418                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3419
3420         if (!rdev->ops->change_bss)
3421                 return -EOPNOTSUPP;
3422
3423         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3424             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3425                 return -EOPNOTSUPP;
3426
3427         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3428 }
3429
3430 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3431         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3432         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3433         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3434         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3435         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3436         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3437 };
3438
3439 static int parse_reg_rule(struct nlattr *tb[],
3440         struct ieee80211_reg_rule *reg_rule)
3441 {
3442         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3443         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3444
3445         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3446                 return -EINVAL;
3447         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3448                 return -EINVAL;
3449         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3450                 return -EINVAL;
3451         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3452                 return -EINVAL;
3453         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3454                 return -EINVAL;
3455
3456         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3457
3458         freq_range->start_freq_khz =
3459                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3460         freq_range->end_freq_khz =
3461                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3462         freq_range->max_bandwidth_khz =
3463                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3464
3465         power_rule->max_eirp =
3466                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3467
3468         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3469                 power_rule->max_antenna_gain =
3470                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3471
3472         return 0;
3473 }
3474
3475 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3476 {
3477         int r;
3478         char *data = NULL;
3479
3480         /*
3481          * You should only get this when cfg80211 hasn't yet initialized
3482          * completely when built-in to the kernel right between the time
3483          * window between nl80211_init() and regulatory_init(), if that is
3484          * even possible.
3485          */
3486         mutex_lock(&cfg80211_mutex);
3487         if (unlikely(!cfg80211_regdomain)) {
3488                 mutex_unlock(&cfg80211_mutex);
3489                 return -EINPROGRESS;
3490         }
3491         mutex_unlock(&cfg80211_mutex);
3492
3493         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3494                 return -EINVAL;
3495
3496         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3497
3498         r = regulatory_hint_user(data);
3499
3500         return r;
3501 }
3502
3503 static int nl80211_get_mesh_config(struct sk_buff *skb,
3504                                    struct genl_info *info)
3505 {
3506         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3507         struct net_device *dev = info->user_ptr[1];
3508         struct wireless_dev *wdev = dev->ieee80211_ptr;
3509         struct mesh_config cur_params;
3510         int err = 0;
3511         void *hdr;
3512         struct nlattr *pinfoattr;
3513         struct sk_buff *msg;
3514
3515         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3516                 return -EOPNOTSUPP;
3517
3518         if (!rdev->ops->get_mesh_config)
3519                 return -EOPNOTSUPP;
3520
3521         wdev_lock(wdev);
3522         /* If not connected, get default parameters */
3523         if (!wdev->mesh_id_len)
3524                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3525         else
3526                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3527                                                  &cur_params);
3528         wdev_unlock(wdev);
3529
3530         if (err)
3531                 return err;
3532
3533         /* Draw up a netlink message to send back */
3534         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3535         if (!msg)
3536                 return -ENOMEM;
3537         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3538                              NL80211_CMD_GET_MESH_CONFIG);
3539         if (!hdr)
3540                 goto out;
3541         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3542         if (!pinfoattr)
3543                 goto nla_put_failure;
3544         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3545             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3546                         cur_params.dot11MeshRetryTimeout) ||
3547             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3548                         cur_params.dot11MeshConfirmTimeout) ||
3549             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3550                         cur_params.dot11MeshHoldingTimeout) ||
3551             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3552                         cur_params.dot11MeshMaxPeerLinks) ||
3553             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3554                        cur_params.dot11MeshMaxRetries) ||
3555             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3556                        cur_params.dot11MeshTTL) ||
3557             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3558                        cur_params.element_ttl) ||
3559             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3560                        cur_params.auto_open_plinks) ||
3561             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3562                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3563             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3564                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3565             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3566                         cur_params.path_refresh_time) ||
3567             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3568                         cur_params.min_discovery_timeout) ||
3569             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3570                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3571             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3572                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3573             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3574                         cur_params.dot11MeshHWMPperrMinInterval) ||
3575             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3576                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3577             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3578                        cur_params.dot11MeshHWMPRootMode) ||
3579             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3580                         cur_params.dot11MeshHWMPRannInterval) ||
3581             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3582                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3583             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3584                        cur_params.dot11MeshForwarding) ||
3585             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3586                         cur_params.rssi_threshold) ||
3587             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3588                         cur_params.ht_opmode) ||
3589             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3590                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3591             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3592                         cur_params.dot11MeshHWMProotInterval) ||
3593             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3594                         cur_params.dot11MeshHWMPconfirmationInterval))
3595                 goto nla_put_failure;
3596         nla_nest_end(msg, pinfoattr);
3597         genlmsg_end(msg, hdr);
3598         return genlmsg_reply(msg, info);
3599
3600  nla_put_failure:
3601         genlmsg_cancel(msg, hdr);
3602  out:
3603         nlmsg_free(msg);
3604         return -ENOBUFS;
3605 }
3606
3607 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3608         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3609         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3610         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3611         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3612         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3613         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3614         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3615         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3616         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3617         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3618         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3619         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3620         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3621         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3622         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3623         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3624         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3625         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3626         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3627         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3628         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3629         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3630         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3631         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3632         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3633 };
3634
3635 static const struct nla_policy
3636         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3637         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3638         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3639         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3640         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3641         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3642                                     .len = IEEE80211_MAX_DATA_LEN },
3643         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3644 };
3645
3646 static int nl80211_parse_mesh_config(struct genl_info *info,
3647                                      struct mesh_config *cfg,
3648                                      u32 *mask_out)
3649 {
3650         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3651         u32 mask = 0;
3652
3653 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3654 do {\
3655         if (table[attr_num]) {\
3656                 cfg->param = nla_fn(table[attr_num]); \
3657                 mask |= (1 << (attr_num - 1)); \
3658         } \
3659 } while (0);\
3660
3661
3662         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3663                 return -EINVAL;
3664         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3665                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3666                              nl80211_meshconf_params_policy))
3667                 return -EINVAL;
3668
3669         /* This makes sure that there aren't more than 32 mesh config
3670          * parameters (otherwise our bitfield scheme would not work.) */
3671         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3672
3673         /* Fill in the params struct */
3674         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3675                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3676                                   nla_get_u16);
3677         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3678                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3679                                   nla_get_u16);
3680         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3681                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3682                                   nla_get_u16);
3683         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3684                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3685                                   nla_get_u16);
3686         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3687                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3688                                   nla_get_u8);
3689         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3690                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3691         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3692                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3693                                   nla_get_u8);
3694         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3695                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3696                                   nla_get_u8);
3697         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3698                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3699                                   nla_get_u32);
3700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3701                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3702                                   nla_get_u8);
3703         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3704                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3705                                   nla_get_u32);
3706         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3707                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3708                                   nla_get_u16);
3709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3710                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3711                                   nla_get_u32);
3712         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3713                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3714                                   nla_get_u16);
3715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3716                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3717                                   nla_get_u16);
3718         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3719                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3720                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3721                                   nla_get_u16);
3722         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3723                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3725                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3726                                   nla_get_u16);
3727         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3728                                   dot11MeshGateAnnouncementProtocol, mask,
3729                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3730                                   nla_get_u8);
3731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3732                                   mask, NL80211_MESHCONF_FORWARDING,
3733                                   nla_get_u8);
3734         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3735                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3736                                   nla_get_u32);
3737         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3738                                   mask, NL80211_MESHCONF_HT_OPMODE,
3739                                   nla_get_u16);
3740         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3741                                   mask,
3742                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3743                                   nla_get_u32);
3744         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3745                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3746                                   nla_get_u16);
3747         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3748                                   dot11MeshHWMPconfirmationInterval, mask,
3749                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3750                                   nla_get_u16);
3751         if (mask_out)
3752                 *mask_out = mask;
3753
3754         return 0;
3755
3756 #undef FILL_IN_MESH_PARAM_IF_SET
3757 }
3758
3759 static int nl80211_parse_mesh_setup(struct genl_info *info,
3760                                      struct mesh_setup *setup)
3761 {
3762         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3763
3764         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3765                 return -EINVAL;
3766         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3767                              info->attrs[NL80211_ATTR_MESH_SETUP],
3768                              nl80211_mesh_setup_params_policy))
3769                 return -EINVAL;
3770
3771         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3772                 setup->sync_method =
3773                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3774                  IEEE80211_SYNC_METHOD_VENDOR :
3775                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3776
3777         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3778                 setup->path_sel_proto =
3779                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3780                  IEEE80211_PATH_PROTOCOL_VENDOR :
3781                  IEEE80211_PATH_PROTOCOL_HWMP;
3782
3783         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3784                 setup->path_metric =
3785                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3786                  IEEE80211_PATH_METRIC_VENDOR :
3787                  IEEE80211_PATH_METRIC_AIRTIME;
3788
3789
3790         if (tb[NL80211_MESH_SETUP_IE]) {
3791                 struct nlattr *ieattr =
3792                         tb[NL80211_MESH_SETUP_IE];
3793                 if (!is_valid_ie_attr(ieattr))
3794                         return -EINVAL;
3795                 setup->ie = nla_data(ieattr);
3796                 setup->ie_len = nla_len(ieattr);
3797         }
3798         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3799         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3800
3801         return 0;
3802 }
3803
3804 static int nl80211_update_mesh_config(struct sk_buff *skb,
3805                                       struct genl_info *info)
3806 {
3807         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3808         struct net_device *dev = info->user_ptr[1];
3809         struct wireless_dev *wdev = dev->ieee80211_ptr;
3810         struct mesh_config cfg;
3811         u32 mask;
3812         int err;
3813
3814         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3815                 return -EOPNOTSUPP;
3816
3817         if (!rdev->ops->update_mesh_config)
3818                 return -EOPNOTSUPP;
3819
3820         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3821         if (err)
3822                 return err;
3823
3824         wdev_lock(wdev);
3825         if (!wdev->mesh_id_len)
3826                 err = -ENOLINK;
3827
3828         if (!err)
3829                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3830                                                     mask, &cfg);
3831
3832         wdev_unlock(wdev);
3833
3834         return err;
3835 }
3836
3837 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3838 {
3839         struct sk_buff *msg;
3840         void *hdr = NULL;
3841         struct nlattr *nl_reg_rules;
3842         unsigned int i;
3843         int err = -EINVAL;
3844
3845         mutex_lock(&cfg80211_mutex);
3846
3847         if (!cfg80211_regdomain)
3848                 goto out;
3849
3850         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3851         if (!msg) {
3852                 err = -ENOBUFS;
3853                 goto out;
3854         }
3855
3856         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3857                              NL80211_CMD_GET_REG);
3858         if (!hdr)
3859                 goto put_failure;
3860
3861         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3862                            cfg80211_regdomain->alpha2) ||
3863             (cfg80211_regdomain->dfs_region &&
3864              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3865                         cfg80211_regdomain->dfs_region)))
3866                 goto nla_put_failure;
3867
3868         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3869         if (!nl_reg_rules)
3870                 goto nla_put_failure;
3871
3872         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3873                 struct nlattr *nl_reg_rule;
3874                 const struct ieee80211_reg_rule *reg_rule;
3875                 const struct ieee80211_freq_range *freq_range;
3876                 const struct ieee80211_power_rule *power_rule;
3877
3878                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3879                 freq_range = &reg_rule->freq_range;
3880                 power_rule = &reg_rule->power_rule;
3881
3882                 nl_reg_rule = nla_nest_start(msg, i);
3883                 if (!nl_reg_rule)
3884                         goto nla_put_failure;
3885
3886                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3887                                 reg_rule->flags) ||
3888                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3889                                 freq_range->start_freq_khz) ||
3890                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3891                                 freq_range->end_freq_khz) ||
3892                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3893                                 freq_range->max_bandwidth_khz) ||
3894                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3895                                 power_rule->max_antenna_gain) ||
3896                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3897                                 power_rule->max_eirp))
3898                         goto nla_put_failure;
3899
3900                 nla_nest_end(msg, nl_reg_rule);
3901         }
3902
3903         nla_nest_end(msg, nl_reg_rules);
3904
3905         genlmsg_end(msg, hdr);
3906         err = genlmsg_reply(msg, info);
3907         goto out;
3908
3909 nla_put_failure:
3910         genlmsg_cancel(msg, hdr);
3911 put_failure:
3912         nlmsg_free(msg);
3913         err = -EMSGSIZE;
3914 out:
3915         mutex_unlock(&cfg80211_mutex);
3916         return err;
3917 }
3918
3919 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3920 {
3921         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3922         struct nlattr *nl_reg_rule;
3923         char *alpha2 = NULL;
3924         int rem_reg_rules = 0, r = 0;
3925         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3926         u8 dfs_region = 0;
3927         struct ieee80211_regdomain *rd = NULL;
3928
3929         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3930                 return -EINVAL;
3931
3932         if (!info->attrs[NL80211_ATTR_REG_RULES])
3933                 return -EINVAL;
3934
3935         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3936
3937         if (info->attrs[NL80211_ATTR_DFS_REGION])
3938                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3939
3940         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3941                         rem_reg_rules) {
3942                 num_rules++;
3943                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3944                         return -EINVAL;
3945         }
3946
3947         mutex_lock(&cfg80211_mutex);
3948
3949         if (!reg_is_valid_request(alpha2)) {
3950                 r = -EINVAL;
3951                 goto bad_reg;
3952         }
3953
3954         size_of_regd = sizeof(struct ieee80211_regdomain) +
3955                 (num_rules * sizeof(struct ieee80211_reg_rule));
3956
3957         rd = kzalloc(size_of_regd, GFP_KERNEL);
3958         if (!rd) {
3959                 r = -ENOMEM;
3960                 goto bad_reg;
3961         }
3962
3963         rd->n_reg_rules = num_rules;
3964         rd->alpha2[0] = alpha2[0];
3965         rd->alpha2[1] = alpha2[1];
3966
3967         /*
3968          * Disable DFS master mode if the DFS region was
3969          * not supported or known on this kernel.
3970          */
3971         if (reg_supported_dfs_region(dfs_region))
3972                 rd->dfs_region = dfs_region;
3973
3974         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3975                         rem_reg_rules) {
3976                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3977                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3978                         reg_rule_policy);
3979                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3980                 if (r)
3981                         goto bad_reg;
3982
3983                 rule_idx++;
3984
3985                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3986                         r = -EINVAL;
3987                         goto bad_reg;
3988                 }
3989         }
3990
3991         BUG_ON(rule_idx != num_rules);
3992
3993         r = set_regdom(rd);
3994
3995         mutex_unlock(&cfg80211_mutex);
3996
3997         return r;
3998
3999  bad_reg:
4000         mutex_unlock(&cfg80211_mutex);
4001         kfree(rd);
4002         return r;
4003 }
4004
4005 static int validate_scan_freqs(struct nlattr *freqs)
4006 {
4007         struct nlattr *attr1, *attr2;
4008         int n_channels = 0, tmp1, tmp2;
4009
4010         nla_for_each_nested(attr1, freqs, tmp1) {
4011                 n_channels++;
4012                 /*
4013                  * Some hardware has a limited channel list for
4014                  * scanning, and it is pretty much nonsensical
4015                  * to scan for a channel twice, so disallow that
4016                  * and don't require drivers to check that the
4017                  * channel list they get isn't longer than what
4018                  * they can scan, as long as they can scan all
4019                  * the channels they registered at once.
4020                  */
4021                 nla_for_each_nested(attr2, freqs, tmp2)
4022                         if (attr1 != attr2 &&
4023                             nla_get_u32(attr1) == nla_get_u32(attr2))
4024                                 return 0;
4025         }
4026
4027         return n_channels;
4028 }
4029
4030 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4031 {
4032         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4033         struct net_device *dev = info->user_ptr[1];
4034         struct cfg80211_scan_request *request;
4035         struct nlattr *attr;
4036         struct wiphy *wiphy;
4037         int err, tmp, n_ssids = 0, n_channels, i;
4038         size_t ie_len;
4039
4040         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4041                 return -EINVAL;
4042
4043         wiphy = &rdev->wiphy;
4044
4045         if (!rdev->ops->scan)
4046                 return -EOPNOTSUPP;
4047
4048         if (rdev->scan_req)
4049                 return -EBUSY;
4050
4051         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4052                 n_channels = validate_scan_freqs(
4053                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4054                 if (!n_channels)
4055                         return -EINVAL;
4056         } else {
4057                 enum ieee80211_band band;
4058                 n_channels = 0;
4059
4060                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4061                         if (wiphy->bands[band])
4062                                 n_channels += wiphy->bands[band]->n_channels;
4063         }
4064
4065         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4066                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4067                         n_ssids++;
4068
4069         if (n_ssids > wiphy->max_scan_ssids)
4070                 return -EINVAL;
4071
4072         if (info->attrs[NL80211_ATTR_IE])
4073                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4074         else
4075                 ie_len = 0;
4076
4077         if (ie_len > wiphy->max_scan_ie_len)
4078                 return -EINVAL;
4079
4080         request = kzalloc(sizeof(*request)
4081                         + sizeof(*request->ssids) * n_ssids
4082                         + sizeof(*request->channels) * n_channels
4083                         + ie_len, GFP_KERNEL);
4084         if (!request)
4085                 return -ENOMEM;
4086
4087         if (n_ssids)
4088                 request->ssids = (void *)&request->channels[n_channels];
4089         request->n_ssids = n_ssids;
4090         if (ie_len) {
4091                 if (request->ssids)
4092                         request->ie = (void *)(request->ssids + n_ssids);
4093                 else
4094                         request->ie = (void *)(request->channels + n_channels);
4095         }
4096
4097         i = 0;
4098         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4099                 /* user specified, bail out if channel not found */
4100                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4101                         struct ieee80211_channel *chan;
4102
4103                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4104
4105                         if (!chan) {
4106                                 err = -EINVAL;
4107                                 goto out_free;
4108                         }
4109
4110                         /* ignore disabled channels */
4111                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4112                                 continue;
4113
4114                         request->channels[i] = chan;
4115                         i++;
4116                 }
4117         } else {
4118                 enum ieee80211_band band;
4119
4120                 /* all channels */
4121                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4122                         int j;
4123                         if (!wiphy->bands[band])
4124                                 continue;
4125                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4126                                 struct ieee80211_channel *chan;
4127
4128                                 chan = &wiphy->bands[band]->channels[j];
4129
4130                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4131                                         continue;
4132
4133                                 request->channels[i] = chan;
4134                                 i++;
4135                         }
4136                 }
4137         }
4138
4139         if (!i) {
4140                 err = -EINVAL;
4141                 goto out_free;
4142         }
4143
4144         request->n_channels = i;
4145
4146         i = 0;
4147         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4148                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4149                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4150                                 err = -EINVAL;
4151                                 goto out_free;
4152                         }
4153                         request->ssids[i].ssid_len = nla_len(attr);
4154                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4155                         i++;
4156                 }
4157         }
4158
4159         if (info->attrs[NL80211_ATTR_IE]) {
4160                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4161                 memcpy((void *)request->ie,
4162                        nla_data(info->attrs[NL80211_ATTR_IE]),
4163                        request->ie_len);
4164         }
4165
4166         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4167                 if (wiphy->bands[i])
4168                         request->rates[i] =
4169                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4170
4171         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4172                 nla_for_each_nested(attr,
4173                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4174                                     tmp) {
4175                         enum ieee80211_band band = nla_type(attr);
4176
4177                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4178                                 err = -EINVAL;
4179                                 goto out_free;
4180                         }
4181                         err = ieee80211_get_ratemask(wiphy->bands[band],
4182                                                      nla_data(attr),
4183                                                      nla_len(attr),
4184                                                      &request->rates[band]);
4185                         if (err)
4186                                 goto out_free;
4187                 }
4188         }
4189
4190         request->no_cck =
4191                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4192
4193         request->dev = dev;
4194         request->wiphy = &rdev->wiphy;
4195
4196         rdev->scan_req = request;
4197         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4198
4199         if (!err) {
4200                 nl80211_send_scan_start(rdev, dev);
4201                 dev_hold(dev);
4202         } else {
4203  out_free:
4204                 rdev->scan_req = NULL;
4205                 kfree(request);
4206         }
4207
4208         return err;
4209 }
4210
4211 static int nl80211_start_sched_scan(struct sk_buff *skb,
4212                                     struct genl_info *info)
4213 {
4214         struct cfg80211_sched_scan_request *request;
4215         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4216         struct net_device *dev = info->user_ptr[1];
4217         struct nlattr *attr;
4218         struct wiphy *wiphy;
4219         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4220         u32 interval;
4221         enum ieee80211_band band;
4222         size_t ie_len;
4223         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4224
4225         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4226             !rdev->ops->sched_scan_start)
4227                 return -EOPNOTSUPP;
4228
4229         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4230                 return -EINVAL;
4231
4232         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4233                 return -EINVAL;
4234
4235         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4236         if (interval == 0)
4237                 return -EINVAL;
4238
4239         wiphy = &rdev->wiphy;
4240
4241         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4242                 n_channels = validate_scan_freqs(
4243                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4244                 if (!n_channels)
4245                         return -EINVAL;
4246         } else {
4247                 n_channels = 0;
4248
4249                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4250                         if (wiphy->bands[band])
4251                                 n_channels += wiphy->bands[band]->n_channels;
4252         }
4253
4254         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4255                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4256                                     tmp)
4257                         n_ssids++;
4258
4259         if (n_ssids > wiphy->max_sched_scan_ssids)
4260                 return -EINVAL;
4261
4262         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4263                 nla_for_each_nested(attr,
4264                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4265                                     tmp)
4266                         n_match_sets++;
4267
4268         if (n_match_sets > wiphy->max_match_sets)
4269                 return -EINVAL;
4270
4271         if (info->attrs[NL80211_ATTR_IE])
4272                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4273         else
4274                 ie_len = 0;
4275
4276         if (ie_len > wiphy->max_sched_scan_ie_len)
4277                 return -EINVAL;
4278
4279         mutex_lock(&rdev->sched_scan_mtx);
4280
4281         if (rdev->sched_scan_req) {
4282                 err = -EINPROGRESS;
4283                 goto out;
4284         }
4285
4286         request = kzalloc(sizeof(*request)
4287                         + sizeof(*request->ssids) * n_ssids
4288                         + sizeof(*request->match_sets) * n_match_sets
4289                         + sizeof(*request->channels) * n_channels
4290                         + ie_len, GFP_KERNEL);
4291         if (!request) {
4292                 err = -ENOMEM;
4293                 goto out;
4294         }
4295
4296         if (n_ssids)
4297                 request->ssids = (void *)&request->channels[n_channels];
4298         request->n_ssids = n_ssids;
4299         if (ie_len) {
4300                 if (request->ssids)
4301                         request->ie = (void *)(request->ssids + n_ssids);
4302                 else
4303                         request->ie = (void *)(request->channels + n_channels);
4304         }
4305
4306         if (n_match_sets) {
4307                 if (request->ie)
4308                         request->match_sets = (void *)(request->ie + ie_len);
4309                 else if (request->ssids)
4310                         request->match_sets =
4311                                 (void *)(request->ssids + n_ssids);
4312                 else
4313                         request->match_sets =
4314                                 (void *)(request->channels + n_channels);
4315         }
4316         request->n_match_sets = n_match_sets;
4317
4318         i = 0;
4319         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4320                 /* user specified, bail out if channel not found */
4321                 nla_for_each_nested(attr,
4322                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4323                                     tmp) {
4324                         struct ieee80211_channel *chan;
4325
4326                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4327
4328                         if (!chan) {
4329                                 err = -EINVAL;
4330                                 goto out_free;
4331                         }
4332
4333                         /* ignore disabled channels */
4334                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4335                                 continue;
4336
4337                         request->channels[i] = chan;
4338                         i++;
4339                 }
4340         } else {
4341                 /* all channels */
4342                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4343                         int j;
4344                         if (!wiphy->bands[band])
4345                                 continue;
4346                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4347                                 struct ieee80211_channel *chan;
4348
4349                                 chan = &wiphy->bands[band]->channels[j];
4350
4351                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4352                                         continue;
4353
4354                                 request->channels[i] = chan;
4355                                 i++;
4356                         }
4357                 }
4358         }
4359
4360         if (!i) {
4361                 err = -EINVAL;
4362                 goto out_free;
4363         }
4364
4365         request->n_channels = i;
4366
4367         i = 0;
4368         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4369                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4370                                     tmp) {
4371                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4372                                 err = -EINVAL;
4373                                 goto out_free;
4374                         }
4375                         request->ssids[i].ssid_len = nla_len(attr);
4376                         memcpy(request->ssids[i].ssid, nla_data(attr),
4377                                nla_len(attr));
4378                         i++;
4379                 }
4380         }
4381
4382         i = 0;
4383         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4384                 nla_for_each_nested(attr,
4385                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4386                                     tmp) {
4387                         struct nlattr *ssid, *rssi;
4388
4389                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4390                                   nla_data(attr), nla_len(attr),
4391                                   nl80211_match_policy);
4392                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4393                         if (ssid) {
4394                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4395                                         err = -EINVAL;
4396                                         goto out_free;
4397                                 }
4398                                 memcpy(request->match_sets[i].ssid.ssid,
4399                                        nla_data(ssid), nla_len(ssid));
4400                                 request->match_sets[i].ssid.ssid_len =
4401                                         nla_len(ssid);
4402                         }
4403                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4404                         if (rssi)
4405                                 request->rssi_thold = nla_get_u32(rssi);
4406                         else
4407                                 request->rssi_thold =
4408                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4409                         i++;
4410                 }
4411         }
4412
4413         if (info->attrs[NL80211_ATTR_IE]) {
4414                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4415                 memcpy((void *)request->ie,
4416                        nla_data(info->attrs[NL80211_ATTR_IE]),
4417                        request->ie_len);
4418         }
4419
4420         request->dev = dev;
4421         request->wiphy = &rdev->wiphy;
4422         request->interval = interval;
4423
4424         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4425         if (!err) {
4426                 rdev->sched_scan_req = request;
4427                 nl80211_send_sched_scan(rdev, dev,
4428                                         NL80211_CMD_START_SCHED_SCAN);
4429                 goto out;
4430         }
4431
4432 out_free:
4433         kfree(request);
4434 out:
4435         mutex_unlock(&rdev->sched_scan_mtx);
4436         return err;
4437 }
4438
4439 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4440                                    struct genl_info *info)
4441 {
4442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4443         int err;
4444
4445         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4446             !rdev->ops->sched_scan_stop)
4447                 return -EOPNOTSUPP;
4448
4449         mutex_lock(&rdev->sched_scan_mtx);
4450         err = __cfg80211_stop_sched_scan(rdev, false);
4451         mutex_unlock(&rdev->sched_scan_mtx);
4452
4453         return err;
4454 }
4455
4456 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4457                             u32 seq, int flags,
4458                             struct cfg80211_registered_device *rdev,
4459                             struct wireless_dev *wdev,
4460                             struct cfg80211_internal_bss *intbss)
4461 {
4462         struct cfg80211_bss *res = &intbss->pub;
4463         void *hdr;
4464         struct nlattr *bss;
4465
4466         ASSERT_WDEV_LOCK(wdev);
4467
4468         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4469                              NL80211_CMD_NEW_SCAN_RESULTS);
4470         if (!hdr)
4471                 return -1;
4472
4473         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4474
4475         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4476             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4477                 goto nla_put_failure;
4478
4479         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4480         if (!bss)
4481                 goto nla_put_failure;
4482         if ((!is_zero_ether_addr(res->bssid) &&
4483              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4484             (res->information_elements && res->len_information_elements &&
4485              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4486                      res->len_information_elements,
4487                      res->information_elements)) ||
4488             (res->beacon_ies && res->len_beacon_ies &&
4489              res->beacon_ies != res->information_elements &&
4490              nla_put(msg, NL80211_BSS_BEACON_IES,
4491                      res->len_beacon_ies, res->beacon_ies)))
4492                 goto nla_put_failure;
4493         if (res->tsf &&
4494             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4495                 goto nla_put_failure;
4496         if (res->beacon_interval &&
4497             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4498                 goto nla_put_failure;
4499         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4500             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4501             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4502                         jiffies_to_msecs(jiffies - intbss->ts)))
4503                 goto nla_put_failure;
4504
4505         switch (rdev->wiphy.signal_type) {
4506         case CFG80211_SIGNAL_TYPE_MBM:
4507                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4508                         goto nla_put_failure;
4509                 break;
4510         case CFG80211_SIGNAL_TYPE_UNSPEC:
4511                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4512                         goto nla_put_failure;
4513                 break;
4514         default:
4515                 break;
4516         }
4517
4518         switch (wdev->iftype) {
4519         case NL80211_IFTYPE_P2P_CLIENT:
4520         case NL80211_IFTYPE_STATION:
4521                 if (intbss == wdev->current_bss &&
4522                     nla_put_u32(msg, NL80211_BSS_STATUS,
4523                                 NL80211_BSS_STATUS_ASSOCIATED))
4524                         goto nla_put_failure;
4525                 break;
4526         case NL80211_IFTYPE_ADHOC:
4527                 if (intbss == wdev->current_bss &&
4528                     nla_put_u32(msg, NL80211_BSS_STATUS,
4529                                 NL80211_BSS_STATUS_IBSS_JOINED))
4530                         goto nla_put_failure;
4531                 break;
4532         default:
4533                 break;
4534         }
4535
4536         nla_nest_end(msg, bss);
4537
4538         return genlmsg_end(msg, hdr);
4539
4540  nla_put_failure:
4541         genlmsg_cancel(msg, hdr);
4542         return -EMSGSIZE;
4543 }
4544
4545 static int nl80211_dump_scan(struct sk_buff *skb,
4546                              struct netlink_callback *cb)
4547 {
4548         struct cfg80211_registered_device *rdev;
4549         struct net_device *dev;
4550         struct cfg80211_internal_bss *scan;
4551         struct wireless_dev *wdev;
4552         int start = cb->args[1], idx = 0;
4553         int err;
4554
4555         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4556         if (err)
4557                 return err;
4558
4559         wdev = dev->ieee80211_ptr;
4560
4561         wdev_lock(wdev);
4562         spin_lock_bh(&rdev->bss_lock);
4563         cfg80211_bss_expire(rdev);
4564
4565         cb->seq = rdev->bss_generation;
4566
4567         list_for_each_entry(scan, &rdev->bss_list, list) {
4568                 if (++idx <= start)
4569                         continue;
4570                 if (nl80211_send_bss(skb, cb,
4571                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4572                                 rdev, wdev, scan) < 0) {
4573                         idx--;
4574                         break;
4575                 }
4576         }
4577
4578         spin_unlock_bh(&rdev->bss_lock);
4579         wdev_unlock(wdev);
4580
4581         cb->args[1] = idx;
4582         nl80211_finish_netdev_dump(rdev);
4583
4584         return skb->len;
4585 }
4586
4587 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4588                                 int flags, struct net_device *dev,
4589                                 struct survey_info *survey)
4590 {
4591         void *hdr;
4592         struct nlattr *infoattr;
4593
4594         hdr = nl80211hdr_put(msg, pid, seq, flags,
4595                              NL80211_CMD_NEW_SURVEY_RESULTS);
4596         if (!hdr)
4597                 return -ENOMEM;
4598
4599         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4600                 goto nla_put_failure;
4601
4602         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4603         if (!infoattr)
4604                 goto nla_put_failure;
4605
4606         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4607                         survey->channel->center_freq))
4608                 goto nla_put_failure;
4609
4610         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4611             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4612                 goto nla_put_failure;
4613         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4614             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4615                 goto nla_put_failure;
4616         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4617             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4618                         survey->channel_time))
4619                 goto nla_put_failure;
4620         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4621             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4622                         survey->channel_time_busy))
4623                 goto nla_put_failure;
4624         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4625             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4626                         survey->channel_time_ext_busy))
4627                 goto nla_put_failure;
4628         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4629             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4630                         survey->channel_time_rx))
4631                 goto nla_put_failure;
4632         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4633             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4634                         survey->channel_time_tx))
4635                 goto nla_put_failure;
4636
4637         nla_nest_end(msg, infoattr);
4638
4639         return genlmsg_end(msg, hdr);
4640
4641  nla_put_failure:
4642         genlmsg_cancel(msg, hdr);
4643         return -EMSGSIZE;
4644 }
4645
4646 static int nl80211_dump_survey(struct sk_buff *skb,
4647                         struct netlink_callback *cb)
4648 {
4649         struct survey_info survey;
4650         struct cfg80211_registered_device *dev;
4651         struct net_device *netdev;
4652         int survey_idx = cb->args[1];
4653         int res;
4654
4655         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4656         if (res)
4657                 return res;
4658
4659         if (!dev->ops->dump_survey) {
4660                 res = -EOPNOTSUPP;
4661                 goto out_err;
4662         }
4663
4664         while (1) {
4665                 struct ieee80211_channel *chan;
4666
4667                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4668                                             &survey);
4669                 if (res == -ENOENT)
4670                         break;
4671                 if (res)
4672                         goto out_err;
4673
4674                 /* Survey without a channel doesn't make sense */
4675                 if (!survey.channel) {
4676                         res = -EINVAL;
4677                         goto out;
4678                 }
4679
4680                 chan = ieee80211_get_channel(&dev->wiphy,
4681                                              survey.channel->center_freq);
4682                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4683                         survey_idx++;
4684                         continue;
4685                 }
4686
4687                 if (nl80211_send_survey(skb,
4688                                 NETLINK_CB(cb->skb).pid,
4689                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4690                                 netdev,
4691                                 &survey) < 0)
4692                         goto out;
4693                 survey_idx++;
4694         }
4695
4696  out:
4697         cb->args[1] = survey_idx;
4698         res = skb->len;
4699  out_err:
4700         nl80211_finish_netdev_dump(dev);
4701         return res;
4702 }
4703
4704 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4705 {
4706         return auth_type <= NL80211_AUTHTYPE_MAX;
4707 }
4708
4709 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4710 {
4711         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4712                                   NL80211_WPA_VERSION_2));
4713 }
4714
4715 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4716 {
4717         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4718         struct net_device *dev = info->user_ptr[1];
4719         struct ieee80211_channel *chan;
4720         const u8 *bssid, *ssid, *ie = NULL;
4721         int err, ssid_len, ie_len = 0;
4722         enum nl80211_auth_type auth_type;
4723         struct key_parse key;
4724         bool local_state_change;
4725
4726         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4727                 return -EINVAL;
4728
4729         if (!info->attrs[NL80211_ATTR_MAC])
4730                 return -EINVAL;
4731
4732         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4733                 return -EINVAL;
4734
4735         if (!info->attrs[NL80211_ATTR_SSID])
4736                 return -EINVAL;
4737
4738         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4739                 return -EINVAL;
4740
4741         err = nl80211_parse_key(info, &key);
4742         if (err)
4743                 return err;
4744
4745         if (key.idx >= 0) {
4746                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4747                         return -EINVAL;
4748                 if (!key.p.key || !key.p.key_len)
4749                         return -EINVAL;
4750                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4751                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4752                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4753                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4754                         return -EINVAL;
4755                 if (key.idx > 4)
4756                         return -EINVAL;
4757         } else {
4758                 key.p.key_len = 0;
4759                 key.p.key = NULL;
4760         }
4761
4762         if (key.idx >= 0) {
4763                 int i;
4764                 bool ok = false;
4765                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4766                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4767                                 ok = true;
4768                                 break;
4769                         }
4770                 }
4771                 if (!ok)
4772                         return -EINVAL;
4773         }
4774
4775         if (!rdev->ops->auth)
4776                 return -EOPNOTSUPP;
4777
4778         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4779             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4780                 return -EOPNOTSUPP;
4781
4782         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4783         chan = ieee80211_get_channel(&rdev->wiphy,
4784                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4785         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4786                 return -EINVAL;
4787
4788         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4789         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4790
4791         if (info->attrs[NL80211_ATTR_IE]) {
4792                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4793                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4794         }
4795
4796         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4797         if (!nl80211_valid_auth_type(auth_type))
4798                 return -EINVAL;
4799
4800         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4801
4802         /*
4803          * Since we no longer track auth state, ignore
4804          * requests to only change local state.
4805          */
4806         if (local_state_change)
4807                 return 0;
4808
4809         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4810                                   ssid, ssid_len, ie, ie_len,
4811                                   key.p.key, key.p.key_len, key.idx);
4812 }
4813
4814 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4815                                    struct genl_info *info,
4816                                    struct cfg80211_crypto_settings *settings,
4817                                    int cipher_limit)
4818 {
4819         memset(settings, 0, sizeof(*settings));
4820
4821         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4822
4823         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4824                 u16 proto;
4825                 proto = nla_get_u16(
4826                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4827                 settings->control_port_ethertype = cpu_to_be16(proto);
4828                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4829                     proto != ETH_P_PAE)
4830                         return -EINVAL;
4831                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4832                         settings->control_port_no_encrypt = true;
4833         } else
4834                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4835
4836         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4837                 void *data;
4838                 int len, i;
4839
4840                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4841                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4842                 settings->n_ciphers_pairwise = len / sizeof(u32);
4843
4844                 if (len % sizeof(u32))
4845                         return -EINVAL;
4846
4847                 if (settings->n_ciphers_pairwise > cipher_limit)
4848                         return -EINVAL;
4849
4850                 memcpy(settings->ciphers_pairwise, data, len);
4851
4852                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4853                         if (!cfg80211_supported_cipher_suite(
4854                                         &rdev->wiphy,
4855                                         settings->ciphers_pairwise[i]))
4856                                 return -EINVAL;
4857         }
4858
4859         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4860                 settings->cipher_group =
4861                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4862                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4863                                                      settings->cipher_group))
4864                         return -EINVAL;
4865         }
4866
4867         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4868                 settings->wpa_versions =
4869                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4870                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4871                         return -EINVAL;
4872         }
4873
4874         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4875                 void *data;
4876                 int len;
4877
4878                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4879                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4880                 settings->n_akm_suites = len / sizeof(u32);
4881
4882                 if (len % sizeof(u32))
4883                         return -EINVAL;
4884
4885                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4886                         return -EINVAL;
4887
4888                 memcpy(settings->akm_suites, data, len);
4889         }
4890
4891         return 0;
4892 }
4893
4894 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4895 {
4896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4897         struct net_device *dev = info->user_ptr[1];
4898         struct cfg80211_crypto_settings crypto;
4899         struct ieee80211_channel *chan;
4900         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4901         int err, ssid_len, ie_len = 0;
4902         bool use_mfp = false;
4903         u32 flags = 0;
4904         struct ieee80211_ht_cap *ht_capa = NULL;
4905         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4906
4907         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4908                 return -EINVAL;
4909
4910         if (!info->attrs[NL80211_ATTR_MAC] ||
4911             !info->attrs[NL80211_ATTR_SSID] ||
4912             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4913                 return -EINVAL;
4914
4915         if (!rdev->ops->assoc)
4916                 return -EOPNOTSUPP;
4917
4918         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4919             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4920                 return -EOPNOTSUPP;
4921
4922         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4923
4924         chan = ieee80211_get_channel(&rdev->wiphy,
4925                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4926         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4927                 return -EINVAL;
4928
4929         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4930         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4931
4932         if (info->attrs[NL80211_ATTR_IE]) {
4933                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4934                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4935         }
4936
4937         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4938                 enum nl80211_mfp mfp =
4939                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4940                 if (mfp == NL80211_MFP_REQUIRED)
4941                         use_mfp = true;
4942                 else if (mfp != NL80211_MFP_NO)
4943                         return -EINVAL;
4944         }
4945
4946         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4947                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4948
4949         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4950                 flags |= ASSOC_REQ_DISABLE_HT;
4951
4952         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4953                 ht_capa_mask =
4954                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4955
4956         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4957                 if (!ht_capa_mask)
4958                         return -EINVAL;
4959                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4960         }
4961
4962         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4963         if (!err)
4964                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4965                                           ssid, ssid_len, ie, ie_len, use_mfp,
4966                                           &crypto, flags, ht_capa,
4967                                           ht_capa_mask);
4968
4969         return err;
4970 }
4971
4972 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4973 {
4974         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4975         struct net_device *dev = info->user_ptr[1];
4976         const u8 *ie = NULL, *bssid;
4977         int ie_len = 0;
4978         u16 reason_code;
4979         bool local_state_change;
4980
4981         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4982                 return -EINVAL;
4983
4984         if (!info->attrs[NL80211_ATTR_MAC])
4985                 return -EINVAL;
4986
4987         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4988                 return -EINVAL;
4989
4990         if (!rdev->ops->deauth)
4991                 return -EOPNOTSUPP;
4992
4993         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4994             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4995                 return -EOPNOTSUPP;
4996
4997         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4998
4999         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5000         if (reason_code == 0) {
5001                 /* Reason Code 0 is reserved */
5002                 return -EINVAL;
5003         }
5004
5005         if (info->attrs[NL80211_ATTR_IE]) {
5006                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5007                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5008         }
5009
5010         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5011
5012         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5013                                     local_state_change);
5014 }
5015
5016 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5017 {
5018         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5019         struct net_device *dev = info->user_ptr[1];
5020         const u8 *ie = NULL, *bssid;
5021         int ie_len = 0;
5022         u16 reason_code;
5023         bool local_state_change;
5024
5025         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5026                 return -EINVAL;
5027
5028         if (!info->attrs[NL80211_ATTR_MAC])
5029                 return -EINVAL;
5030
5031         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5032                 return -EINVAL;
5033
5034         if (!rdev->ops->disassoc)
5035                 return -EOPNOTSUPP;
5036
5037         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5038             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5039                 return -EOPNOTSUPP;
5040
5041         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5042
5043         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5044         if (reason_code == 0) {
5045                 /* Reason Code 0 is reserved */
5046                 return -EINVAL;
5047         }
5048
5049         if (info->attrs[NL80211_ATTR_IE]) {
5050                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5051                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5052         }
5053
5054         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5055
5056         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5057                                       local_state_change);
5058 }
5059
5060 static bool
5061 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5062                          int mcast_rate[IEEE80211_NUM_BANDS],
5063                          int rateval)
5064 {
5065         struct wiphy *wiphy = &rdev->wiphy;
5066         bool found = false;
5067         int band, i;
5068
5069         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5070                 struct ieee80211_supported_band *sband;
5071
5072                 sband = wiphy->bands[band];
5073                 if (!sband)
5074                         continue;
5075
5076                 for (i = 0; i < sband->n_bitrates; i++) {
5077                         if (sband->bitrates[i].bitrate == rateval) {
5078                                 mcast_rate[band] = i + 1;
5079                                 found = true;
5080                                 break;
5081                         }
5082                 }
5083         }
5084
5085         return found;
5086 }
5087
5088 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5089 {
5090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5091         struct net_device *dev = info->user_ptr[1];
5092         struct cfg80211_ibss_params ibss;
5093         struct wiphy *wiphy;
5094         struct cfg80211_cached_keys *connkeys = NULL;
5095         int err;
5096
5097         memset(&ibss, 0, sizeof(ibss));
5098
5099         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5100                 return -EINVAL;
5101
5102         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5103             !info->attrs[NL80211_ATTR_SSID] ||
5104             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5105                 return -EINVAL;
5106
5107         ibss.beacon_interval = 100;
5108
5109         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5110                 ibss.beacon_interval =
5111                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5112                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5113                         return -EINVAL;
5114         }
5115
5116         if (!rdev->ops->join_ibss)
5117                 return -EOPNOTSUPP;
5118
5119         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5120                 return -EOPNOTSUPP;
5121
5122         wiphy = &rdev->wiphy;
5123
5124         if (info->attrs[NL80211_ATTR_MAC]) {
5125                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5126
5127                 if (!is_valid_ether_addr(ibss.bssid))
5128                         return -EINVAL;
5129         }
5130         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5131         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5132
5133         if (info->attrs[NL80211_ATTR_IE]) {
5134                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5135                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5136         }
5137
5138         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5139                 enum nl80211_channel_type channel_type;
5140
5141                 if (!nl80211_valid_channel_type(info, &channel_type))
5142                         return -EINVAL;
5143
5144                 if (channel_type != NL80211_CHAN_NO_HT &&
5145                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5146                         return -EINVAL;
5147
5148                 ibss.channel_type = channel_type;
5149         } else {
5150                 ibss.channel_type = NL80211_CHAN_NO_HT;
5151         }
5152
5153         ibss.channel = rdev_freq_to_chan(rdev,
5154                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5155                 ibss.channel_type);
5156         if (!ibss.channel ||
5157             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5158             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5159                 return -EINVAL;
5160
5161         /* Both channels should be able to initiate communication */
5162         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5163              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5164             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5165                                           ibss.channel_type))
5166                 return -EINVAL;
5167
5168         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5169         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5170
5171         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5172                 u8 *rates =
5173                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5174                 int n_rates =
5175                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5176                 struct ieee80211_supported_band *sband =
5177                         wiphy->bands[ibss.channel->band];
5178
5179                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5180                                              &ibss.basic_rates);
5181                 if (err)
5182                         return err;
5183         }
5184
5185         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5186             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5187                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5188                 return -EINVAL;
5189
5190         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5191                 connkeys = nl80211_parse_connkeys(rdev,
5192                                         info->attrs[NL80211_ATTR_KEYS]);
5193                 if (IS_ERR(connkeys))
5194                         return PTR_ERR(connkeys);
5195         }
5196
5197         ibss.control_port =
5198                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5199
5200         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5201         if (err)
5202                 kfree(connkeys);
5203         return err;
5204 }
5205
5206 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5207 {
5208         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5209         struct net_device *dev = info->user_ptr[1];
5210
5211         if (!rdev->ops->leave_ibss)
5212                 return -EOPNOTSUPP;
5213
5214         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5215                 return -EOPNOTSUPP;
5216
5217         return cfg80211_leave_ibss(rdev, dev, false);
5218 }
5219
5220 #ifdef CONFIG_NL80211_TESTMODE
5221 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5222         .name = "testmode",
5223 };
5224
5225 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5226 {
5227         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5228         int err;
5229
5230         if (!info->attrs[NL80211_ATTR_TESTDATA])
5231                 return -EINVAL;
5232
5233         err = -EOPNOTSUPP;
5234         if (rdev->ops->testmode_cmd) {
5235                 rdev->testmode_info = info;
5236                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5237                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5238                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5239                 rdev->testmode_info = NULL;
5240         }
5241
5242         return err;
5243 }
5244
5245 static int nl80211_testmode_dump(struct sk_buff *skb,
5246                                  struct netlink_callback *cb)
5247 {
5248         struct cfg80211_registered_device *rdev;
5249         int err;
5250         long phy_idx;
5251         void *data = NULL;
5252         int data_len = 0;
5253
5254         if (cb->args[0]) {
5255                 /*
5256                  * 0 is a valid index, but not valid for args[0],
5257                  * so we need to offset by 1.
5258                  */
5259                 phy_idx = cb->args[0] - 1;
5260         } else {
5261                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5262                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5263                                   nl80211_policy);
5264                 if (err)
5265                         return err;
5266
5267                 mutex_lock(&cfg80211_mutex);
5268                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5269                                                   nl80211_fam.attrbuf);
5270                 if (IS_ERR(rdev)) {
5271                         mutex_unlock(&cfg80211_mutex);
5272                         return PTR_ERR(rdev);
5273                 }
5274                 phy_idx = rdev->wiphy_idx;
5275                 rdev = NULL;
5276                 mutex_unlock(&cfg80211_mutex);
5277
5278                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5279                         cb->args[1] =
5280                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5281         }
5282
5283         if (cb->args[1]) {
5284                 data = nla_data((void *)cb->args[1]);
5285                 data_len = nla_len((void *)cb->args[1]);
5286         }
5287
5288         mutex_lock(&cfg80211_mutex);
5289         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5290         if (!rdev) {
5291                 mutex_unlock(&cfg80211_mutex);
5292                 return -ENOENT;
5293         }
5294         cfg80211_lock_rdev(rdev);
5295         mutex_unlock(&cfg80211_mutex);
5296
5297         if (!rdev->ops->testmode_dump) {
5298                 err = -EOPNOTSUPP;
5299                 goto out_err;
5300         }
5301
5302         while (1) {
5303                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5304                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5305                                            NL80211_CMD_TESTMODE);
5306                 struct nlattr *tmdata;
5307
5308                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5309                         genlmsg_cancel(skb, hdr);
5310                         break;
5311                 }
5312
5313                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5314                 if (!tmdata) {
5315                         genlmsg_cancel(skb, hdr);
5316                         break;
5317                 }
5318                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5319                                                data, data_len);
5320                 nla_nest_end(skb, tmdata);
5321
5322                 if (err == -ENOBUFS || err == -ENOENT) {
5323                         genlmsg_cancel(skb, hdr);
5324                         break;
5325                 } else if (err) {
5326                         genlmsg_cancel(skb, hdr);
5327                         goto out_err;
5328                 }
5329
5330                 genlmsg_end(skb, hdr);
5331         }
5332
5333         err = skb->len;
5334         /* see above */
5335         cb->args[0] = phy_idx + 1;
5336  out_err:
5337         cfg80211_unlock_rdev(rdev);
5338         return err;
5339 }
5340
5341 static struct sk_buff *
5342 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5343                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5344 {
5345         struct sk_buff *skb;
5346         void *hdr;
5347         struct nlattr *data;
5348
5349         skb = nlmsg_new(approxlen + 100, gfp);
5350         if (!skb)
5351                 return NULL;
5352
5353         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5354         if (!hdr) {
5355                 kfree_skb(skb);
5356                 return NULL;
5357         }
5358
5359         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5360                 goto nla_put_failure;
5361         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5362
5363         ((void **)skb->cb)[0] = rdev;
5364         ((void **)skb->cb)[1] = hdr;
5365         ((void **)skb->cb)[2] = data;
5366
5367         return skb;
5368
5369  nla_put_failure:
5370         kfree_skb(skb);
5371         return NULL;
5372 }
5373
5374 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5375                                                   int approxlen)
5376 {
5377         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5378
5379         if (WARN_ON(!rdev->testmode_info))
5380                 return NULL;
5381
5382         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5383                                 rdev->testmode_info->snd_pid,
5384                                 rdev->testmode_info->snd_seq,
5385                                 GFP_KERNEL);
5386 }
5387 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5388
5389 int cfg80211_testmode_reply(struct sk_buff *skb)
5390 {
5391         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5392         void *hdr = ((void **)skb->cb)[1];
5393         struct nlattr *data = ((void **)skb->cb)[2];
5394
5395         if (WARN_ON(!rdev->testmode_info)) {
5396                 kfree_skb(skb);
5397                 return -EINVAL;
5398         }
5399
5400         nla_nest_end(skb, data);
5401         genlmsg_end(skb, hdr);
5402         return genlmsg_reply(skb, rdev->testmode_info);
5403 }
5404 EXPORT_SYMBOL(cfg80211_testmode_reply);
5405
5406 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5407                                                   int approxlen, gfp_t gfp)
5408 {
5409         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5410
5411         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5412 }
5413 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5414
5415 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5416 {
5417         void *hdr = ((void **)skb->cb)[1];
5418         struct nlattr *data = ((void **)skb->cb)[2];
5419
5420         nla_nest_end(skb, data);
5421         genlmsg_end(skb, hdr);
5422         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5423 }
5424 EXPORT_SYMBOL(cfg80211_testmode_event);
5425 #endif
5426
5427 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5428 {
5429         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5430         struct net_device *dev = info->user_ptr[1];
5431         struct cfg80211_connect_params connect;
5432         struct wiphy *wiphy;
5433         struct cfg80211_cached_keys *connkeys = NULL;
5434         int err;
5435
5436         memset(&connect, 0, sizeof(connect));
5437
5438         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5439                 return -EINVAL;
5440
5441         if (!info->attrs[NL80211_ATTR_SSID] ||
5442             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5443                 return -EINVAL;
5444
5445         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5446                 connect.auth_type =
5447                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5448                 if (!nl80211_valid_auth_type(connect.auth_type))
5449                         return -EINVAL;
5450         } else
5451                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5452
5453         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5454
5455         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5456                                       NL80211_MAX_NR_CIPHER_SUITES);
5457         if (err)
5458                 return err;
5459
5460         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5461             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5462                 return -EOPNOTSUPP;
5463
5464         wiphy = &rdev->wiphy;
5465
5466         connect.bg_scan_period = -1;
5467         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5468                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5469                 connect.bg_scan_period =
5470                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5471         }
5472
5473         if (info->attrs[NL80211_ATTR_MAC])
5474                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5475         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5476         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5477
5478         if (info->attrs[NL80211_ATTR_IE]) {
5479                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5480                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5481         }
5482
5483         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5484                 connect.channel =
5485                         ieee80211_get_channel(wiphy,
5486                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5487                 if (!connect.channel ||
5488                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5489                         return -EINVAL;
5490         }
5491
5492         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5493                 connkeys = nl80211_parse_connkeys(rdev,
5494                                         info->attrs[NL80211_ATTR_KEYS]);
5495                 if (IS_ERR(connkeys))
5496                         return PTR_ERR(connkeys);
5497         }
5498
5499         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5500                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5501
5502         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5503                 memcpy(&connect.ht_capa_mask,
5504                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5505                        sizeof(connect.ht_capa_mask));
5506
5507         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5508                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5509                         return -EINVAL;
5510                 memcpy(&connect.ht_capa,
5511                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5512                        sizeof(connect.ht_capa));
5513         }
5514
5515         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5516         if (err)
5517                 kfree(connkeys);
5518         return err;
5519 }
5520
5521 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5522 {
5523         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5524         struct net_device *dev = info->user_ptr[1];
5525         u16 reason;
5526
5527         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5528                 reason = WLAN_REASON_DEAUTH_LEAVING;
5529         else
5530                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5531
5532         if (reason == 0)
5533                 return -EINVAL;
5534
5535         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5536             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5537                 return -EOPNOTSUPP;
5538
5539         return cfg80211_disconnect(rdev, dev, reason, true);
5540 }
5541
5542 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5543 {
5544         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5545         struct net *net;
5546         int err;
5547         u32 pid;
5548
5549         if (!info->attrs[NL80211_ATTR_PID])
5550                 return -EINVAL;
5551
5552         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5553
5554         net = get_net_ns_by_pid(pid);
5555         if (IS_ERR(net))
5556                 return PTR_ERR(net);
5557
5558         err = 0;
5559
5560         /* check if anything to do */
5561         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5562                 err = cfg80211_switch_netns(rdev, net);
5563
5564         put_net(net);
5565         return err;
5566 }
5567
5568 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5569 {
5570         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5571         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5572                         struct cfg80211_pmksa *pmksa) = NULL;
5573         struct net_device *dev = info->user_ptr[1];
5574         struct cfg80211_pmksa pmksa;
5575
5576         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5577
5578         if (!info->attrs[NL80211_ATTR_MAC])
5579                 return -EINVAL;
5580
5581         if (!info->attrs[NL80211_ATTR_PMKID])
5582                 return -EINVAL;
5583
5584         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5585         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5586
5587         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5588             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5589                 return -EOPNOTSUPP;
5590
5591         switch (info->genlhdr->cmd) {
5592         case NL80211_CMD_SET_PMKSA:
5593                 rdev_ops = rdev->ops->set_pmksa;
5594                 break;
5595         case NL80211_CMD_DEL_PMKSA:
5596                 rdev_ops = rdev->ops->del_pmksa;
5597                 break;
5598         default:
5599                 WARN_ON(1);
5600                 break;
5601         }
5602
5603         if (!rdev_ops)
5604                 return -EOPNOTSUPP;
5605
5606         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5607 }
5608
5609 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5610 {
5611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5612         struct net_device *dev = info->user_ptr[1];
5613
5614         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5615             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5616                 return -EOPNOTSUPP;
5617
5618         if (!rdev->ops->flush_pmksa)
5619                 return -EOPNOTSUPP;
5620
5621         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5622 }
5623
5624 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5625 {
5626         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5627         struct net_device *dev = info->user_ptr[1];
5628         u8 action_code, dialog_token;
5629         u16 status_code;
5630         u8 *peer;
5631
5632         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5633             !rdev->ops->tdls_mgmt)
5634                 return -EOPNOTSUPP;
5635
5636         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5637             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5638             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5639             !info->attrs[NL80211_ATTR_IE] ||
5640             !info->attrs[NL80211_ATTR_MAC])
5641                 return -EINVAL;
5642
5643         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5644         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5645         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5646         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5647
5648         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5649                                     dialog_token, status_code,
5650                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5651                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5652 }
5653
5654 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5655 {
5656         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5657         struct net_device *dev = info->user_ptr[1];
5658         enum nl80211_tdls_operation operation;
5659         u8 *peer;
5660
5661         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5662             !rdev->ops->tdls_oper)
5663                 return -EOPNOTSUPP;
5664
5665         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5666             !info->attrs[NL80211_ATTR_MAC])
5667                 return -EINVAL;
5668
5669         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5670         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5671
5672         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5673 }
5674
5675 static int nl80211_remain_on_channel(struct sk_buff *skb,
5676                                      struct genl_info *info)
5677 {
5678         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5679         struct net_device *dev = info->user_ptr[1];
5680         struct ieee80211_channel *chan;
5681         struct sk_buff *msg;
5682         void *hdr;
5683         u64 cookie;
5684         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5685         u32 freq, duration;
5686         int err;
5687
5688         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5689             !info->attrs[NL80211_ATTR_DURATION])
5690                 return -EINVAL;
5691
5692         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5693
5694         if (!rdev->ops->remain_on_channel ||
5695             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5696                 return -EOPNOTSUPP;
5697
5698         /*
5699          * We should be on that channel for at least a minimum amount of
5700          * time (10ms) but no longer than the driver supports.
5701          */
5702         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5703             duration > rdev->wiphy.max_remain_on_channel_duration)
5704                 return -EINVAL;
5705
5706         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5707             !nl80211_valid_channel_type(info, &channel_type))
5708                 return -EINVAL;
5709
5710         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5711         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5712         if (chan == NULL)
5713                 return -EINVAL;
5714
5715         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5716         if (!msg)
5717                 return -ENOMEM;
5718
5719         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5720                              NL80211_CMD_REMAIN_ON_CHANNEL);
5721
5722         if (IS_ERR(hdr)) {
5723                 err = PTR_ERR(hdr);
5724                 goto free_msg;
5725         }
5726
5727         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5728                                            channel_type, duration, &cookie);
5729
5730         if (err)
5731                 goto free_msg;
5732
5733         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5734                 goto nla_put_failure;
5735
5736         genlmsg_end(msg, hdr);
5737
5738         return genlmsg_reply(msg, info);
5739
5740  nla_put_failure:
5741         err = -ENOBUFS;
5742  free_msg:
5743         nlmsg_free(msg);
5744         return err;
5745 }
5746
5747 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5748                                             struct genl_info *info)
5749 {
5750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5751         struct net_device *dev = info->user_ptr[1];
5752         u64 cookie;
5753
5754         if (!info->attrs[NL80211_ATTR_COOKIE])
5755                 return -EINVAL;
5756
5757         if (!rdev->ops->cancel_remain_on_channel)
5758                 return -EOPNOTSUPP;
5759
5760         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5761
5762         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5763 }
5764
5765 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5766                            u8 *rates, u8 rates_len)
5767 {
5768         u8 i;
5769         u32 mask = 0;
5770
5771         for (i = 0; i < rates_len; i++) {
5772                 int rate = (rates[i] & 0x7f) * 5;
5773                 int ridx;
5774                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5775                         struct ieee80211_rate *srate =
5776                                 &sband->bitrates[ridx];
5777                         if (rate == srate->bitrate) {
5778                                 mask |= 1 << ridx;
5779                                 break;
5780                         }
5781                 }
5782                 if (ridx == sband->n_bitrates)
5783                         return 0; /* rate not found */
5784         }
5785
5786         return mask;
5787 }
5788
5789 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5790                                u8 *rates, u8 rates_len,
5791                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5792 {
5793         u8 i;
5794
5795         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5796
5797         for (i = 0; i < rates_len; i++) {
5798                 int ridx, rbit;
5799
5800                 ridx = rates[i] / 8;
5801                 rbit = BIT(rates[i] % 8);
5802
5803                 /* check validity */
5804                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5805                         return false;
5806
5807                 /* check availability */
5808                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5809                         mcs[ridx] |= rbit;
5810                 else
5811                         return false;
5812         }
5813
5814         return true;
5815 }
5816
5817 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5818         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5819                                     .len = NL80211_MAX_SUPP_RATES },
5820         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5821                                  .len = NL80211_MAX_SUPP_HT_RATES },
5822 };
5823
5824 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5825                                        struct genl_info *info)
5826 {
5827         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5829         struct cfg80211_bitrate_mask mask;
5830         int rem, i;
5831         struct net_device *dev = info->user_ptr[1];
5832         struct nlattr *tx_rates;
5833         struct ieee80211_supported_band *sband;
5834
5835         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5836                 return -EINVAL;
5837
5838         if (!rdev->ops->set_bitrate_mask)
5839                 return -EOPNOTSUPP;
5840
5841         memset(&mask, 0, sizeof(mask));
5842         /* Default to all rates enabled */
5843         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5844                 sband = rdev->wiphy.bands[i];
5845                 mask.control[i].legacy =
5846                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5847                 if (sband)
5848                         memcpy(mask.control[i].mcs,
5849                                sband->ht_cap.mcs.rx_mask,
5850                                sizeof(mask.control[i].mcs));
5851                 else
5852                         memset(mask.control[i].mcs, 0,
5853                                sizeof(mask.control[i].mcs));
5854         }
5855
5856         /*
5857          * The nested attribute uses enum nl80211_band as the index. This maps
5858          * directly to the enum ieee80211_band values used in cfg80211.
5859          */
5860         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5861         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5862         {
5863                 enum ieee80211_band band = nla_type(tx_rates);
5864                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5865                         return -EINVAL;
5866                 sband = rdev->wiphy.bands[band];
5867                 if (sband == NULL)
5868                         return -EINVAL;
5869                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5870                           nla_len(tx_rates), nl80211_txattr_policy);
5871                 if (tb[NL80211_TXRATE_LEGACY]) {
5872                         mask.control[band].legacy = rateset_to_mask(
5873                                 sband,
5874                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5875                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5876                         if ((mask.control[band].legacy == 0) &&
5877                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5878                                 return -EINVAL;
5879                 }
5880                 if (tb[NL80211_TXRATE_MCS]) {
5881                         if (!ht_rateset_to_mask(
5882                                         sband,
5883                                         nla_data(tb[NL80211_TXRATE_MCS]),
5884                                         nla_len(tb[NL80211_TXRATE_MCS]),
5885                                         mask.control[band].mcs))
5886                                 return -EINVAL;
5887                 }
5888
5889                 if (mask.control[band].legacy == 0) {
5890                         /* don't allow empty legacy rates if HT
5891                          * is not even supported. */
5892                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5893                                 return -EINVAL;
5894
5895                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5896                                 if (mask.control[band].mcs[i])
5897                                         break;
5898
5899                         /* legacy and mcs rates may not be both empty */
5900                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5901                                 return -EINVAL;
5902                 }
5903         }
5904
5905         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5906 }
5907
5908 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5909 {
5910         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5911         struct net_device *dev = info->user_ptr[1];
5912         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5913
5914         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5915                 return -EINVAL;
5916
5917         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5918                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5919
5920         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5921             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5922             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5923             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5924             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5925             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5926             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5927                 return -EOPNOTSUPP;
5928
5929         /* not much point in registering if we can't reply */
5930         if (!rdev->ops->mgmt_tx)
5931                 return -EOPNOTSUPP;
5932
5933         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5934                         frame_type,
5935                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5936                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5937 }
5938
5939 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5940 {
5941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5942         struct net_device *dev = info->user_ptr[1];
5943         struct ieee80211_channel *chan;
5944         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5945         bool channel_type_valid = false;
5946         u32 freq;
5947         int err;
5948         void *hdr = NULL;
5949         u64 cookie;
5950         struct sk_buff *msg = NULL;
5951         unsigned int wait = 0;
5952         bool offchan, no_cck, dont_wait_for_ack;
5953
5954         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5955
5956         if (!info->attrs[NL80211_ATTR_FRAME] ||
5957             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5958                 return -EINVAL;
5959
5960         if (!rdev->ops->mgmt_tx)
5961                 return -EOPNOTSUPP;
5962
5963         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5964             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5965             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5966             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5967             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5968             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5969             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5970                 return -EOPNOTSUPP;
5971
5972         if (info->attrs[NL80211_ATTR_DURATION]) {
5973                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5974                         return -EINVAL;
5975                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5976
5977                 /*
5978                  * We should wait on the channel for at least a minimum amount
5979                  * of time (10ms) but no longer than the driver supports.
5980                  */
5981                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5982                     wait > rdev->wiphy.max_remain_on_channel_duration)
5983                         return -EINVAL;
5984
5985         }
5986
5987         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5988                 if (!nl80211_valid_channel_type(info, &channel_type))
5989                         return -EINVAL;
5990                 channel_type_valid = true;
5991         }
5992
5993         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5994
5995         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5996                 return -EINVAL;
5997
5998         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5999
6000         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6001         chan = rdev_freq_to_chan(rdev, freq, channel_type);
6002         if (chan == NULL)
6003                 return -EINVAL;
6004
6005         if (!dont_wait_for_ack) {
6006                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6007                 if (!msg)
6008                         return -ENOMEM;
6009
6010                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6011                                      NL80211_CMD_FRAME);
6012
6013                 if (IS_ERR(hdr)) {
6014                         err = PTR_ERR(hdr);
6015                         goto free_msg;
6016                 }
6017         }
6018
6019         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
6020                                     channel_type_valid, wait,
6021                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6022                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6023                                     no_cck, dont_wait_for_ack, &cookie);
6024         if (err)
6025                 goto free_msg;
6026
6027         if (msg) {
6028                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6029                         goto nla_put_failure;
6030
6031                 genlmsg_end(msg, hdr);
6032                 return genlmsg_reply(msg, info);
6033         }
6034
6035         return 0;
6036
6037  nla_put_failure:
6038         err = -ENOBUFS;
6039  free_msg:
6040         nlmsg_free(msg);
6041         return err;
6042 }
6043
6044 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6045 {
6046         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6047         struct net_device *dev = info->user_ptr[1];
6048         u64 cookie;
6049
6050         if (!info->attrs[NL80211_ATTR_COOKIE])
6051                 return -EINVAL;
6052
6053         if (!rdev->ops->mgmt_tx_cancel_wait)
6054                 return -EOPNOTSUPP;
6055
6056         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6057             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6058             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6059             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6060             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6061             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6062                 return -EOPNOTSUPP;
6063
6064         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6065
6066         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6067 }
6068
6069 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6070 {
6071         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6072         struct wireless_dev *wdev;
6073         struct net_device *dev = info->user_ptr[1];
6074         u8 ps_state;
6075         bool state;
6076         int err;
6077
6078         if (!info->attrs[NL80211_ATTR_PS_STATE])
6079                 return -EINVAL;
6080
6081         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6082
6083         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6084                 return -EINVAL;
6085
6086         wdev = dev->ieee80211_ptr;
6087
6088         if (!rdev->ops->set_power_mgmt)
6089                 return -EOPNOTSUPP;
6090
6091         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6092
6093         if (state == wdev->ps)
6094                 return 0;
6095
6096         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6097                                         wdev->ps_timeout);
6098         if (!err)
6099                 wdev->ps = state;
6100         return err;
6101 }
6102
6103 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6104 {
6105         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6106         enum nl80211_ps_state ps_state;
6107         struct wireless_dev *wdev;
6108         struct net_device *dev = info->user_ptr[1];
6109         struct sk_buff *msg;
6110         void *hdr;
6111         int err;
6112
6113         wdev = dev->ieee80211_ptr;
6114
6115         if (!rdev->ops->set_power_mgmt)
6116                 return -EOPNOTSUPP;
6117
6118         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6119         if (!msg)
6120                 return -ENOMEM;
6121
6122         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6123                              NL80211_CMD_GET_POWER_SAVE);
6124         if (!hdr) {
6125                 err = -ENOBUFS;
6126                 goto free_msg;
6127         }
6128
6129         if (wdev->ps)
6130                 ps_state = NL80211_PS_ENABLED;
6131         else
6132                 ps_state = NL80211_PS_DISABLED;
6133
6134         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6135                 goto nla_put_failure;
6136
6137         genlmsg_end(msg, hdr);
6138         return genlmsg_reply(msg, info);
6139
6140  nla_put_failure:
6141         err = -ENOBUFS;
6142  free_msg:
6143         nlmsg_free(msg);
6144         return err;
6145 }
6146
6147 static struct nla_policy
6148 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6149         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6150         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6151         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6152 };
6153
6154 static int nl80211_set_cqm_rssi(struct genl_info *info,
6155                                 s32 threshold, u32 hysteresis)
6156 {
6157         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6158         struct wireless_dev *wdev;
6159         struct net_device *dev = info->user_ptr[1];
6160
6161         if (threshold > 0)
6162                 return -EINVAL;
6163
6164         wdev = dev->ieee80211_ptr;
6165
6166         if (!rdev->ops->set_cqm_rssi_config)
6167                 return -EOPNOTSUPP;
6168
6169         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6170             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6171                 return -EOPNOTSUPP;
6172
6173         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6174                                               threshold, hysteresis);
6175 }
6176
6177 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6178 {
6179         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6180         struct nlattr *cqm;
6181         int err;
6182
6183         cqm = info->attrs[NL80211_ATTR_CQM];
6184         if (!cqm) {
6185                 err = -EINVAL;
6186                 goto out;
6187         }
6188
6189         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6190                                nl80211_attr_cqm_policy);
6191         if (err)
6192                 goto out;
6193
6194         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6195             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6196                 s32 threshold;
6197                 u32 hysteresis;
6198                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6199                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6200                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6201         } else
6202                 err = -EINVAL;
6203
6204 out:
6205         return err;
6206 }
6207
6208 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6209 {
6210         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6211         struct net_device *dev = info->user_ptr[1];
6212         struct mesh_config cfg;
6213         struct mesh_setup setup;
6214         int err;
6215
6216         /* start with default */
6217         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6218         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6219
6220         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6221                 /* and parse parameters if given */
6222                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6223                 if (err)
6224                         return err;
6225         }
6226
6227         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6228             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6229                 return -EINVAL;
6230
6231         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6232         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6233
6234         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6235             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6236                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6237                         return -EINVAL;
6238
6239         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6240                 /* parse additional setup parameters if given */
6241                 err = nl80211_parse_mesh_setup(info, &setup);
6242                 if (err)
6243                         return err;
6244         }
6245
6246         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6247                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6248
6249                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6250                     !nl80211_valid_channel_type(info, &channel_type))
6251                         return -EINVAL;
6252
6253                 setup.channel = rdev_freq_to_chan(rdev,
6254                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6255                         channel_type);
6256                 if (!setup.channel)
6257                         return -EINVAL;
6258                 setup.channel_type = channel_type;
6259         } else {
6260                 /* cfg80211_join_mesh() will sort it out */
6261                 setup.channel = NULL;
6262         }
6263
6264         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6265 }
6266
6267 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6268 {
6269         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6270         struct net_device *dev = info->user_ptr[1];
6271
6272         return cfg80211_leave_mesh(rdev, dev);
6273 }
6274
6275 #ifdef CONFIG_PM
6276 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6277 {
6278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6279         struct sk_buff *msg;
6280         void *hdr;
6281
6282         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6283                 return -EOPNOTSUPP;
6284
6285         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6286         if (!msg)
6287                 return -ENOMEM;
6288
6289         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6290                              NL80211_CMD_GET_WOWLAN);
6291         if (!hdr)
6292                 goto nla_put_failure;
6293
6294         if (rdev->wowlan) {
6295                 struct nlattr *nl_wowlan;
6296
6297                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6298                 if (!nl_wowlan)
6299                         goto nla_put_failure;
6300
6301                 if ((rdev->wowlan->any &&
6302                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6303                     (rdev->wowlan->disconnect &&
6304                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6305                     (rdev->wowlan->magic_pkt &&
6306                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6307                     (rdev->wowlan->gtk_rekey_failure &&
6308                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6309                     (rdev->wowlan->eap_identity_req &&
6310                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6311                     (rdev->wowlan->four_way_handshake &&
6312                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6313                     (rdev->wowlan->rfkill_release &&
6314                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6315                         goto nla_put_failure;
6316                 if (rdev->wowlan->n_patterns) {
6317                         struct nlattr *nl_pats, *nl_pat;
6318                         int i, pat_len;
6319
6320                         nl_pats = nla_nest_start(msg,
6321                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6322                         if (!nl_pats)
6323                                 goto nla_put_failure;
6324
6325                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6326                                 nl_pat = nla_nest_start(msg, i + 1);
6327                                 if (!nl_pat)
6328                                         goto nla_put_failure;
6329                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6330                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6331                                             DIV_ROUND_UP(pat_len, 8),
6332                                             rdev->wowlan->patterns[i].mask) ||
6333                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6334                                             pat_len,
6335                                             rdev->wowlan->patterns[i].pattern))
6336                                         goto nla_put_failure;
6337                                 nla_nest_end(msg, nl_pat);
6338                         }
6339                         nla_nest_end(msg, nl_pats);
6340                 }
6341
6342                 nla_nest_end(msg, nl_wowlan);
6343         }
6344
6345         genlmsg_end(msg, hdr);
6346         return genlmsg_reply(msg, info);
6347
6348 nla_put_failure:
6349         nlmsg_free(msg);
6350         return -ENOBUFS;
6351 }
6352
6353 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6354 {
6355         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6356         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6357         struct cfg80211_wowlan no_triggers = {};
6358         struct cfg80211_wowlan new_triggers = {};
6359         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6360         int err, i;
6361         bool prev_enabled = rdev->wowlan;
6362
6363         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6364                 return -EOPNOTSUPP;
6365
6366         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6367                 goto no_triggers;
6368
6369         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6370                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6371                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6372                         nl80211_wowlan_policy);
6373         if (err)
6374                 return err;
6375
6376         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6377                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6378                         return -EINVAL;
6379                 new_triggers.any = true;
6380         }
6381
6382         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6383                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6384                         return -EINVAL;
6385                 new_triggers.disconnect = true;
6386         }
6387
6388         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6389                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6390                         return -EINVAL;
6391                 new_triggers.magic_pkt = true;
6392         }
6393
6394         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6395                 return -EINVAL;
6396
6397         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6398                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6399                         return -EINVAL;
6400                 new_triggers.gtk_rekey_failure = true;
6401         }
6402
6403         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6404                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6405                         return -EINVAL;
6406                 new_triggers.eap_identity_req = true;
6407         }
6408
6409         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6410                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6411                         return -EINVAL;
6412                 new_triggers.four_way_handshake = true;
6413         }
6414
6415         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6416                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6417                         return -EINVAL;
6418                 new_triggers.rfkill_release = true;
6419         }
6420
6421         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6422                 struct nlattr *pat;
6423                 int n_patterns = 0;
6424                 int rem, pat_len, mask_len;
6425                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6426
6427                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6428                                     rem)
6429                         n_patterns++;
6430                 if (n_patterns > wowlan->n_patterns)
6431                         return -EINVAL;
6432
6433                 new_triggers.patterns = kcalloc(n_patterns,
6434                                                 sizeof(new_triggers.patterns[0]),
6435                                                 GFP_KERNEL);
6436                 if (!new_triggers.patterns)
6437                         return -ENOMEM;
6438
6439                 new_triggers.n_patterns = n_patterns;
6440                 i = 0;
6441
6442                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6443                                     rem) {
6444                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6445                                   nla_data(pat), nla_len(pat), NULL);
6446                         err = -EINVAL;
6447                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6448                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6449                                 goto error;
6450                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6451                         mask_len = DIV_ROUND_UP(pat_len, 8);
6452                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6453                             mask_len)
6454                                 goto error;
6455                         if (pat_len > wowlan->pattern_max_len ||
6456                             pat_len < wowlan->pattern_min_len)
6457                                 goto error;
6458
6459                         new_triggers.patterns[i].mask =
6460                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6461                         if (!new_triggers.patterns[i].mask) {
6462                                 err = -ENOMEM;
6463                                 goto error;
6464                         }
6465                         new_triggers.patterns[i].pattern =
6466                                 new_triggers.patterns[i].mask + mask_len;
6467                         memcpy(new_triggers.patterns[i].mask,
6468                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6469                                mask_len);
6470                         new_triggers.patterns[i].pattern_len = pat_len;
6471                         memcpy(new_triggers.patterns[i].pattern,
6472                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6473                                pat_len);
6474                         i++;
6475                 }
6476         }
6477
6478         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6479                 struct cfg80211_wowlan *ntrig;
6480                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6481                                 GFP_KERNEL);
6482                 if (!ntrig) {
6483                         err = -ENOMEM;
6484                         goto error;
6485                 }
6486                 cfg80211_rdev_free_wowlan(rdev);
6487                 rdev->wowlan = ntrig;
6488         } else {
6489  no_triggers:
6490                 cfg80211_rdev_free_wowlan(rdev);
6491                 rdev->wowlan = NULL;
6492         }
6493
6494         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6495                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6496
6497         return 0;
6498  error:
6499         for (i = 0; i < new_triggers.n_patterns; i++)
6500                 kfree(new_triggers.patterns[i].mask);
6501         kfree(new_triggers.patterns);
6502         return err;
6503 }
6504 #endif
6505
6506 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6507 {
6508         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6509         struct net_device *dev = info->user_ptr[1];
6510         struct wireless_dev *wdev = dev->ieee80211_ptr;
6511         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6512         struct cfg80211_gtk_rekey_data rekey_data;
6513         int err;
6514
6515         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6516                 return -EINVAL;
6517
6518         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6519                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6520                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6521                         nl80211_rekey_policy);
6522         if (err)
6523                 return err;
6524
6525         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6526                 return -ERANGE;
6527         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6528                 return -ERANGE;
6529         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6530                 return -ERANGE;
6531
6532         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6533                NL80211_KEK_LEN);
6534         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6535                NL80211_KCK_LEN);
6536         memcpy(rekey_data.replay_ctr,
6537                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6538                NL80211_REPLAY_CTR_LEN);
6539
6540         wdev_lock(wdev);
6541         if (!wdev->current_bss) {
6542                 err = -ENOTCONN;
6543                 goto out;
6544         }
6545
6546         if (!rdev->ops->set_rekey_data) {
6547                 err = -EOPNOTSUPP;
6548                 goto out;
6549         }
6550
6551         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6552  out:
6553         wdev_unlock(wdev);
6554         return err;
6555 }
6556
6557 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6558                                              struct genl_info *info)
6559 {
6560         struct net_device *dev = info->user_ptr[1];
6561         struct wireless_dev *wdev = dev->ieee80211_ptr;
6562
6563         if (wdev->iftype != NL80211_IFTYPE_AP &&
6564             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6565                 return -EINVAL;
6566
6567         if (wdev->ap_unexpected_nlpid)
6568                 return -EBUSY;
6569
6570         wdev->ap_unexpected_nlpid = info->snd_pid;
6571         return 0;
6572 }
6573
6574 static int nl80211_probe_client(struct sk_buff *skb,
6575                                 struct genl_info *info)
6576 {
6577         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6578         struct net_device *dev = info->user_ptr[1];
6579         struct wireless_dev *wdev = dev->ieee80211_ptr;
6580         struct sk_buff *msg;
6581         void *hdr;
6582         const u8 *addr;
6583         u64 cookie;
6584         int err;
6585
6586         if (wdev->iftype != NL80211_IFTYPE_AP &&
6587             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6588                 return -EOPNOTSUPP;
6589
6590         if (!info->attrs[NL80211_ATTR_MAC])
6591                 return -EINVAL;
6592
6593         if (!rdev->ops->probe_client)
6594                 return -EOPNOTSUPP;
6595
6596         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6597         if (!msg)
6598                 return -ENOMEM;
6599
6600         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6601                              NL80211_CMD_PROBE_CLIENT);
6602
6603         if (IS_ERR(hdr)) {
6604                 err = PTR_ERR(hdr);
6605                 goto free_msg;
6606         }
6607
6608         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6609
6610         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6611         if (err)
6612                 goto free_msg;
6613
6614         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6615                 goto nla_put_failure;
6616
6617         genlmsg_end(msg, hdr);
6618
6619         return genlmsg_reply(msg, info);
6620
6621  nla_put_failure:
6622         err = -ENOBUFS;
6623  free_msg:
6624         nlmsg_free(msg);
6625         return err;
6626 }
6627
6628 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6629 {
6630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6631
6632         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6633                 return -EOPNOTSUPP;
6634
6635         if (rdev->ap_beacons_nlpid)
6636                 return -EBUSY;
6637
6638         rdev->ap_beacons_nlpid = info->snd_pid;
6639
6640         return 0;
6641 }
6642
6643 #define NL80211_FLAG_NEED_WIPHY         0x01
6644 #define NL80211_FLAG_NEED_NETDEV        0x02
6645 #define NL80211_FLAG_NEED_RTNL          0x04
6646 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6647 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6648                                          NL80211_FLAG_CHECK_NETDEV_UP)
6649
6650 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6651                             struct genl_info *info)
6652 {
6653         struct cfg80211_registered_device *rdev;
6654         struct net_device *dev;
6655         int err;
6656         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6657
6658         if (rtnl)
6659                 rtnl_lock();
6660
6661         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6662                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6663                 if (IS_ERR(rdev)) {
6664                         if (rtnl)
6665                                 rtnl_unlock();
6666                         return PTR_ERR(rdev);
6667                 }
6668                 info->user_ptr[0] = rdev;
6669         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6670                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6671                                               &rdev, &dev);
6672                 if (err) {
6673                         if (rtnl)
6674                                 rtnl_unlock();
6675                         return err;
6676                 }
6677                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6678                     !netif_running(dev)) {
6679                         cfg80211_unlock_rdev(rdev);
6680                         dev_put(dev);
6681                         if (rtnl)
6682                                 rtnl_unlock();
6683                         return -ENETDOWN;
6684                 }
6685                 info->user_ptr[0] = rdev;
6686                 info->user_ptr[1] = dev;
6687         }
6688
6689         return 0;
6690 }
6691
6692 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6693                               struct genl_info *info)
6694 {
6695         if (info->user_ptr[0])
6696                 cfg80211_unlock_rdev(info->user_ptr[0]);
6697         if (info->user_ptr[1])
6698                 dev_put(info->user_ptr[1]);
6699         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6700                 rtnl_unlock();
6701 }
6702
6703 static struct genl_ops nl80211_ops[] = {
6704         {
6705                 .cmd = NL80211_CMD_GET_WIPHY,
6706                 .doit = nl80211_get_wiphy,
6707                 .dumpit = nl80211_dump_wiphy,
6708                 .policy = nl80211_policy,
6709                 /* can be retrieved by unprivileged users */
6710                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6711         },
6712         {
6713                 .cmd = NL80211_CMD_SET_WIPHY,
6714                 .doit = nl80211_set_wiphy,
6715                 .policy = nl80211_policy,
6716                 .flags = GENL_ADMIN_PERM,
6717                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6718         },
6719         {
6720                 .cmd = NL80211_CMD_GET_INTERFACE,
6721                 .doit = nl80211_get_interface,
6722                 .dumpit = nl80211_dump_interface,
6723                 .policy = nl80211_policy,
6724                 /* can be retrieved by unprivileged users */
6725                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6726         },
6727         {
6728                 .cmd = NL80211_CMD_SET_INTERFACE,
6729                 .doit = nl80211_set_interface,
6730                 .policy = nl80211_policy,
6731                 .flags = GENL_ADMIN_PERM,
6732                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6733                                   NL80211_FLAG_NEED_RTNL,
6734         },
6735         {
6736                 .cmd = NL80211_CMD_NEW_INTERFACE,
6737                 .doit = nl80211_new_interface,
6738                 .policy = nl80211_policy,
6739                 .flags = GENL_ADMIN_PERM,
6740                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6741                                   NL80211_FLAG_NEED_RTNL,
6742         },
6743         {
6744                 .cmd = NL80211_CMD_DEL_INTERFACE,
6745                 .doit = nl80211_del_interface,
6746                 .policy = nl80211_policy,
6747                 .flags = GENL_ADMIN_PERM,
6748                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6749                                   NL80211_FLAG_NEED_RTNL,
6750         },
6751         {
6752                 .cmd = NL80211_CMD_GET_KEY,
6753                 .doit = nl80211_get_key,
6754                 .policy = nl80211_policy,
6755                 .flags = GENL_ADMIN_PERM,
6756                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6757                                   NL80211_FLAG_NEED_RTNL,
6758         },
6759         {
6760                 .cmd = NL80211_CMD_SET_KEY,
6761                 .doit = nl80211_set_key,
6762                 .policy = nl80211_policy,
6763                 .flags = GENL_ADMIN_PERM,
6764                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6765                                   NL80211_FLAG_NEED_RTNL,
6766         },
6767         {
6768                 .cmd = NL80211_CMD_NEW_KEY,
6769                 .doit = nl80211_new_key,
6770                 .policy = nl80211_policy,
6771                 .flags = GENL_ADMIN_PERM,
6772                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6773                                   NL80211_FLAG_NEED_RTNL,
6774         },
6775         {
6776                 .cmd = NL80211_CMD_DEL_KEY,
6777                 .doit = nl80211_del_key,
6778                 .policy = nl80211_policy,
6779                 .flags = GENL_ADMIN_PERM,
6780                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6781                                   NL80211_FLAG_NEED_RTNL,
6782         },
6783         {
6784                 .cmd = NL80211_CMD_SET_BEACON,
6785                 .policy = nl80211_policy,
6786                 .flags = GENL_ADMIN_PERM,
6787                 .doit = nl80211_set_beacon,
6788                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6789                                   NL80211_FLAG_NEED_RTNL,
6790         },
6791         {
6792                 .cmd = NL80211_CMD_START_AP,
6793                 .policy = nl80211_policy,
6794                 .flags = GENL_ADMIN_PERM,
6795                 .doit = nl80211_start_ap,
6796                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6797                                   NL80211_FLAG_NEED_RTNL,
6798         },
6799         {
6800                 .cmd = NL80211_CMD_STOP_AP,
6801                 .policy = nl80211_policy,
6802                 .flags = GENL_ADMIN_PERM,
6803                 .doit = nl80211_stop_ap,
6804                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6805                                   NL80211_FLAG_NEED_RTNL,
6806         },
6807         {
6808                 .cmd = NL80211_CMD_GET_STATION,
6809                 .doit = nl80211_get_station,
6810                 .dumpit = nl80211_dump_station,
6811                 .policy = nl80211_policy,
6812                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6813                                   NL80211_FLAG_NEED_RTNL,
6814         },
6815         {
6816                 .cmd = NL80211_CMD_SET_STATION,
6817                 .doit = nl80211_set_station,
6818                 .policy = nl80211_policy,
6819                 .flags = GENL_ADMIN_PERM,
6820                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6821                                   NL80211_FLAG_NEED_RTNL,
6822         },
6823         {
6824                 .cmd = NL80211_CMD_NEW_STATION,
6825                 .doit = nl80211_new_station,
6826                 .policy = nl80211_policy,
6827                 .flags = GENL_ADMIN_PERM,
6828                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6829                                   NL80211_FLAG_NEED_RTNL,
6830         },
6831         {
6832                 .cmd = NL80211_CMD_DEL_STATION,
6833                 .doit = nl80211_del_station,
6834                 .policy = nl80211_policy,
6835                 .flags = GENL_ADMIN_PERM,
6836                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6837                                   NL80211_FLAG_NEED_RTNL,
6838         },
6839         {
6840                 .cmd = NL80211_CMD_GET_MPATH,
6841                 .doit = nl80211_get_mpath,
6842                 .dumpit = nl80211_dump_mpath,
6843                 .policy = nl80211_policy,
6844                 .flags = GENL_ADMIN_PERM,
6845                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6846                                   NL80211_FLAG_NEED_RTNL,
6847         },
6848         {
6849                 .cmd = NL80211_CMD_SET_MPATH,
6850                 .doit = nl80211_set_mpath,
6851                 .policy = nl80211_policy,
6852                 .flags = GENL_ADMIN_PERM,
6853                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6854                                   NL80211_FLAG_NEED_RTNL,
6855         },
6856         {
6857                 .cmd = NL80211_CMD_NEW_MPATH,
6858                 .doit = nl80211_new_mpath,
6859                 .policy = nl80211_policy,
6860                 .flags = GENL_ADMIN_PERM,
6861                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6862                                   NL80211_FLAG_NEED_RTNL,
6863         },
6864         {
6865                 .cmd = NL80211_CMD_DEL_MPATH,
6866                 .doit = nl80211_del_mpath,
6867                 .policy = nl80211_policy,
6868                 .flags = GENL_ADMIN_PERM,
6869                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6870                                   NL80211_FLAG_NEED_RTNL,
6871         },
6872         {
6873                 .cmd = NL80211_CMD_SET_BSS,
6874                 .doit = nl80211_set_bss,
6875                 .policy = nl80211_policy,
6876                 .flags = GENL_ADMIN_PERM,
6877                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6878                                   NL80211_FLAG_NEED_RTNL,
6879         },
6880         {
6881                 .cmd = NL80211_CMD_GET_REG,
6882                 .doit = nl80211_get_reg,
6883                 .policy = nl80211_policy,
6884                 /* can be retrieved by unprivileged users */
6885         },
6886         {
6887                 .cmd = NL80211_CMD_SET_REG,
6888                 .doit = nl80211_set_reg,
6889                 .policy = nl80211_policy,
6890                 .flags = GENL_ADMIN_PERM,
6891         },
6892         {
6893                 .cmd = NL80211_CMD_REQ_SET_REG,
6894                 .doit = nl80211_req_set_reg,
6895                 .policy = nl80211_policy,
6896                 .flags = GENL_ADMIN_PERM,
6897         },
6898         {
6899                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6900                 .doit = nl80211_get_mesh_config,
6901                 .policy = nl80211_policy,
6902                 /* can be retrieved by unprivileged users */
6903                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6904                                   NL80211_FLAG_NEED_RTNL,
6905         },
6906         {
6907                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6908                 .doit = nl80211_update_mesh_config,
6909                 .policy = nl80211_policy,
6910                 .flags = GENL_ADMIN_PERM,
6911                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6912                                   NL80211_FLAG_NEED_RTNL,
6913         },
6914         {
6915                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6916                 .doit = nl80211_trigger_scan,
6917                 .policy = nl80211_policy,
6918                 .flags = GENL_ADMIN_PERM,
6919                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6920                                   NL80211_FLAG_NEED_RTNL,
6921         },
6922         {
6923                 .cmd = NL80211_CMD_GET_SCAN,
6924                 .policy = nl80211_policy,
6925                 .dumpit = nl80211_dump_scan,
6926         },
6927         {
6928                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6929                 .doit = nl80211_start_sched_scan,
6930                 .policy = nl80211_policy,
6931                 .flags = GENL_ADMIN_PERM,
6932                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6933                                   NL80211_FLAG_NEED_RTNL,
6934         },
6935         {
6936                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6937                 .doit = nl80211_stop_sched_scan,
6938                 .policy = nl80211_policy,
6939                 .flags = GENL_ADMIN_PERM,
6940                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6941                                   NL80211_FLAG_NEED_RTNL,
6942         },
6943         {
6944                 .cmd = NL80211_CMD_AUTHENTICATE,
6945                 .doit = nl80211_authenticate,
6946                 .policy = nl80211_policy,
6947                 .flags = GENL_ADMIN_PERM,
6948                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6949                                   NL80211_FLAG_NEED_RTNL,
6950         },
6951         {
6952                 .cmd = NL80211_CMD_ASSOCIATE,
6953                 .doit = nl80211_associate,
6954                 .policy = nl80211_policy,
6955                 .flags = GENL_ADMIN_PERM,
6956                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6957                                   NL80211_FLAG_NEED_RTNL,
6958         },
6959         {
6960                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6961                 .doit = nl80211_deauthenticate,
6962                 .policy = nl80211_policy,
6963                 .flags = GENL_ADMIN_PERM,
6964                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6965                                   NL80211_FLAG_NEED_RTNL,
6966         },
6967         {
6968                 .cmd = NL80211_CMD_DISASSOCIATE,
6969                 .doit = nl80211_disassociate,
6970                 .policy = nl80211_policy,
6971                 .flags = GENL_ADMIN_PERM,
6972                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6973                                   NL80211_FLAG_NEED_RTNL,
6974         },
6975         {
6976                 .cmd = NL80211_CMD_JOIN_IBSS,
6977                 .doit = nl80211_join_ibss,
6978                 .policy = nl80211_policy,
6979                 .flags = GENL_ADMIN_PERM,
6980                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6981                                   NL80211_FLAG_NEED_RTNL,
6982         },
6983         {
6984                 .cmd = NL80211_CMD_LEAVE_IBSS,
6985                 .doit = nl80211_leave_ibss,
6986                 .policy = nl80211_policy,
6987                 .flags = GENL_ADMIN_PERM,
6988                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6989                                   NL80211_FLAG_NEED_RTNL,
6990         },
6991 #ifdef CONFIG_NL80211_TESTMODE
6992         {
6993                 .cmd = NL80211_CMD_TESTMODE,
6994                 .doit = nl80211_testmode_do,
6995                 .dumpit = nl80211_testmode_dump,
6996                 .policy = nl80211_policy,
6997                 .flags = GENL_ADMIN_PERM,
6998                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6999                                   NL80211_FLAG_NEED_RTNL,
7000         },
7001 #endif
7002         {
7003                 .cmd = NL80211_CMD_CONNECT,
7004                 .doit = nl80211_connect,
7005                 .policy = nl80211_policy,
7006                 .flags = GENL_ADMIN_PERM,
7007                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7008                                   NL80211_FLAG_NEED_RTNL,
7009         },
7010         {
7011                 .cmd = NL80211_CMD_DISCONNECT,
7012                 .doit = nl80211_disconnect,
7013                 .policy = nl80211_policy,
7014                 .flags = GENL_ADMIN_PERM,
7015                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7016                                   NL80211_FLAG_NEED_RTNL,
7017         },
7018         {
7019                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7020                 .doit = nl80211_wiphy_netns,
7021                 .policy = nl80211_policy,
7022                 .flags = GENL_ADMIN_PERM,
7023                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7024                                   NL80211_FLAG_NEED_RTNL,
7025         },
7026         {
7027                 .cmd = NL80211_CMD_GET_SURVEY,
7028                 .policy = nl80211_policy,
7029                 .dumpit = nl80211_dump_survey,
7030         },
7031         {
7032                 .cmd = NL80211_CMD_SET_PMKSA,
7033                 .doit = nl80211_setdel_pmksa,
7034                 .policy = nl80211_policy,
7035                 .flags = GENL_ADMIN_PERM,
7036                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7037                                   NL80211_FLAG_NEED_RTNL,
7038         },
7039         {
7040                 .cmd = NL80211_CMD_DEL_PMKSA,
7041                 .doit = nl80211_setdel_pmksa,
7042                 .policy = nl80211_policy,
7043                 .flags = GENL_ADMIN_PERM,
7044                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7045                                   NL80211_FLAG_NEED_RTNL,
7046         },
7047         {
7048                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7049                 .doit = nl80211_flush_pmksa,
7050                 .policy = nl80211_policy,
7051                 .flags = GENL_ADMIN_PERM,
7052                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7053                                   NL80211_FLAG_NEED_RTNL,
7054         },
7055         {
7056                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7057                 .doit = nl80211_remain_on_channel,
7058                 .policy = nl80211_policy,
7059                 .flags = GENL_ADMIN_PERM,
7060                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7061                                   NL80211_FLAG_NEED_RTNL,
7062         },
7063         {
7064                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7065                 .doit = nl80211_cancel_remain_on_channel,
7066                 .policy = nl80211_policy,
7067                 .flags = GENL_ADMIN_PERM,
7068                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7069                                   NL80211_FLAG_NEED_RTNL,
7070         },
7071         {
7072                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7073                 .doit = nl80211_set_tx_bitrate_mask,
7074                 .policy = nl80211_policy,
7075                 .flags = GENL_ADMIN_PERM,
7076                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7077                                   NL80211_FLAG_NEED_RTNL,
7078         },
7079         {
7080                 .cmd = NL80211_CMD_REGISTER_FRAME,
7081                 .doit = nl80211_register_mgmt,
7082                 .policy = nl80211_policy,
7083                 .flags = GENL_ADMIN_PERM,
7084                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7085                                   NL80211_FLAG_NEED_RTNL,
7086         },
7087         {
7088                 .cmd = NL80211_CMD_FRAME,
7089                 .doit = nl80211_tx_mgmt,
7090                 .policy = nl80211_policy,
7091                 .flags = GENL_ADMIN_PERM,
7092                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7093                                   NL80211_FLAG_NEED_RTNL,
7094         },
7095         {
7096                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7097                 .doit = nl80211_tx_mgmt_cancel_wait,
7098                 .policy = nl80211_policy,
7099                 .flags = GENL_ADMIN_PERM,
7100                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7101                                   NL80211_FLAG_NEED_RTNL,
7102         },
7103         {
7104                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7105                 .doit = nl80211_set_power_save,
7106                 .policy = nl80211_policy,
7107                 .flags = GENL_ADMIN_PERM,
7108                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7109                                   NL80211_FLAG_NEED_RTNL,
7110         },
7111         {
7112                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7113                 .doit = nl80211_get_power_save,
7114                 .policy = nl80211_policy,
7115                 /* can be retrieved by unprivileged users */
7116                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7117                                   NL80211_FLAG_NEED_RTNL,
7118         },
7119         {
7120                 .cmd = NL80211_CMD_SET_CQM,
7121                 .doit = nl80211_set_cqm,
7122                 .policy = nl80211_policy,
7123                 .flags = GENL_ADMIN_PERM,
7124                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7125                                   NL80211_FLAG_NEED_RTNL,
7126         },
7127         {
7128                 .cmd = NL80211_CMD_SET_CHANNEL,
7129                 .doit = nl80211_set_channel,
7130                 .policy = nl80211_policy,
7131                 .flags = GENL_ADMIN_PERM,
7132                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7133                                   NL80211_FLAG_NEED_RTNL,
7134         },
7135         {
7136                 .cmd = NL80211_CMD_SET_WDS_PEER,
7137                 .doit = nl80211_set_wds_peer,
7138                 .policy = nl80211_policy,
7139                 .flags = GENL_ADMIN_PERM,
7140                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7141                                   NL80211_FLAG_NEED_RTNL,
7142         },
7143         {
7144                 .cmd = NL80211_CMD_JOIN_MESH,
7145                 .doit = nl80211_join_mesh,
7146                 .policy = nl80211_policy,
7147                 .flags = GENL_ADMIN_PERM,
7148                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7149                                   NL80211_FLAG_NEED_RTNL,
7150         },
7151         {
7152                 .cmd = NL80211_CMD_LEAVE_MESH,
7153                 .doit = nl80211_leave_mesh,
7154                 .policy = nl80211_policy,
7155                 .flags = GENL_ADMIN_PERM,
7156                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7157                                   NL80211_FLAG_NEED_RTNL,
7158         },
7159 #ifdef CONFIG_PM
7160         {
7161                 .cmd = NL80211_CMD_GET_WOWLAN,
7162                 .doit = nl80211_get_wowlan,
7163                 .policy = nl80211_policy,
7164                 /* can be retrieved by unprivileged users */
7165                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7166                                   NL80211_FLAG_NEED_RTNL,
7167         },
7168         {
7169                 .cmd = NL80211_CMD_SET_WOWLAN,
7170                 .doit = nl80211_set_wowlan,
7171                 .policy = nl80211_policy,
7172                 .flags = GENL_ADMIN_PERM,
7173                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7174                                   NL80211_FLAG_NEED_RTNL,
7175         },
7176 #endif
7177         {
7178                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7179                 .doit = nl80211_set_rekey_data,
7180                 .policy = nl80211_policy,
7181                 .flags = GENL_ADMIN_PERM,
7182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7183                                   NL80211_FLAG_NEED_RTNL,
7184         },
7185         {
7186                 .cmd = NL80211_CMD_TDLS_MGMT,
7187                 .doit = nl80211_tdls_mgmt,
7188                 .policy = nl80211_policy,
7189                 .flags = GENL_ADMIN_PERM,
7190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7191                                   NL80211_FLAG_NEED_RTNL,
7192         },
7193         {
7194                 .cmd = NL80211_CMD_TDLS_OPER,
7195                 .doit = nl80211_tdls_oper,
7196                 .policy = nl80211_policy,
7197                 .flags = GENL_ADMIN_PERM,
7198                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7199                                   NL80211_FLAG_NEED_RTNL,
7200         },
7201         {
7202                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7203                 .doit = nl80211_register_unexpected_frame,
7204                 .policy = nl80211_policy,
7205                 .flags = GENL_ADMIN_PERM,
7206                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7207                                   NL80211_FLAG_NEED_RTNL,
7208         },
7209         {
7210                 .cmd = NL80211_CMD_PROBE_CLIENT,
7211                 .doit = nl80211_probe_client,
7212                 .policy = nl80211_policy,
7213                 .flags = GENL_ADMIN_PERM,
7214                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7215                                   NL80211_FLAG_NEED_RTNL,
7216         },
7217         {
7218                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7219                 .doit = nl80211_register_beacons,
7220                 .policy = nl80211_policy,
7221                 .flags = GENL_ADMIN_PERM,
7222                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7223                                   NL80211_FLAG_NEED_RTNL,
7224         },
7225         {
7226                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7227                 .doit = nl80211_set_noack_map,
7228                 .policy = nl80211_policy,
7229                 .flags = GENL_ADMIN_PERM,
7230                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7231                                   NL80211_FLAG_NEED_RTNL,
7232         },
7233
7234 };
7235
7236 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7237         .name = "mlme",
7238 };
7239
7240 /* multicast groups */
7241 static struct genl_multicast_group nl80211_config_mcgrp = {
7242         .name = "config",
7243 };
7244 static struct genl_multicast_group nl80211_scan_mcgrp = {
7245         .name = "scan",
7246 };
7247 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7248         .name = "regulatory",
7249 };
7250
7251 /* notification functions */
7252
7253 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7254 {
7255         struct sk_buff *msg;
7256
7257         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7258         if (!msg)
7259                 return;
7260
7261         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7262                 nlmsg_free(msg);
7263                 return;
7264         }
7265
7266         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7267                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7268 }
7269
7270 static int nl80211_add_scan_req(struct sk_buff *msg,
7271                                 struct cfg80211_registered_device *rdev)
7272 {
7273         struct cfg80211_scan_request *req = rdev->scan_req;
7274         struct nlattr *nest;
7275         int i;
7276
7277         ASSERT_RDEV_LOCK(rdev);
7278
7279         if (WARN_ON(!req))
7280                 return 0;
7281
7282         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7283         if (!nest)
7284                 goto nla_put_failure;
7285         for (i = 0; i < req->n_ssids; i++) {
7286                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7287                         goto nla_put_failure;
7288         }
7289         nla_nest_end(msg, nest);
7290
7291         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7292         if (!nest)
7293                 goto nla_put_failure;
7294         for (i = 0; i < req->n_channels; i++) {
7295                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7296                         goto nla_put_failure;
7297         }
7298         nla_nest_end(msg, nest);
7299
7300         if (req->ie &&
7301             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7302                 goto nla_put_failure;
7303
7304         return 0;
7305  nla_put_failure:
7306         return -ENOBUFS;
7307 }
7308
7309 static int nl80211_send_scan_msg(struct sk_buff *msg,
7310                                  struct cfg80211_registered_device *rdev,
7311                                  struct net_device *netdev,
7312                                  u32 pid, u32 seq, int flags,
7313                                  u32 cmd)
7314 {
7315         void *hdr;
7316
7317         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7318         if (!hdr)
7319                 return -1;
7320
7321         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7322             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7323                 goto nla_put_failure;
7324
7325         /* ignore errors and send incomplete event anyway */
7326         nl80211_add_scan_req(msg, rdev);
7327
7328         return genlmsg_end(msg, hdr);
7329
7330  nla_put_failure:
7331         genlmsg_cancel(msg, hdr);
7332         return -EMSGSIZE;
7333 }
7334
7335 static int
7336 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7337                             struct cfg80211_registered_device *rdev,
7338                             struct net_device *netdev,
7339                             u32 pid, u32 seq, int flags, u32 cmd)
7340 {
7341         void *hdr;
7342
7343         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7344         if (!hdr)
7345                 return -1;
7346
7347         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7348             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7349                 goto nla_put_failure;
7350
7351         return genlmsg_end(msg, hdr);
7352
7353  nla_put_failure:
7354         genlmsg_cancel(msg, hdr);
7355         return -EMSGSIZE;
7356 }
7357
7358 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7359                              struct net_device *netdev)
7360 {
7361         struct sk_buff *msg;
7362
7363         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7364         if (!msg)
7365                 return;
7366
7367         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7368                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7369                 nlmsg_free(msg);
7370                 return;
7371         }
7372
7373         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7374                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7375 }
7376
7377 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7378                             struct net_device *netdev)
7379 {
7380         struct sk_buff *msg;
7381
7382         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7383         if (!msg)
7384                 return;
7385
7386         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7387                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7388                 nlmsg_free(msg);
7389                 return;
7390         }
7391
7392         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7393                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7394 }
7395
7396 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7397                                struct net_device *netdev)
7398 {
7399         struct sk_buff *msg;
7400
7401         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7402         if (!msg)
7403                 return;
7404
7405         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7406                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7407                 nlmsg_free(msg);
7408                 return;
7409         }
7410
7411         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7412                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7413 }
7414
7415 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7416                                      struct net_device *netdev)
7417 {
7418         struct sk_buff *msg;
7419
7420         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7421         if (!msg)
7422                 return;
7423
7424         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7425                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7426                 nlmsg_free(msg);
7427                 return;
7428         }
7429
7430         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7431                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7432 }
7433
7434 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7435                              struct net_device *netdev, u32 cmd)
7436 {
7437         struct sk_buff *msg;
7438
7439         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7440         if (!msg)
7441                 return;
7442
7443         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7444                 nlmsg_free(msg);
7445                 return;
7446         }
7447
7448         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7449                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7450 }
7451
7452 /*
7453  * This can happen on global regulatory changes or device specific settings
7454  * based on custom world regulatory domains.
7455  */
7456 void nl80211_send_reg_change_event(struct regulatory_request *request)
7457 {
7458         struct sk_buff *msg;
7459         void *hdr;
7460
7461         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7462         if (!msg)
7463                 return;
7464
7465         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7466         if (!hdr) {
7467                 nlmsg_free(msg);
7468                 return;
7469         }
7470
7471         /* Userspace can always count this one always being set */
7472         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7473                 goto nla_put_failure;
7474
7475         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7476                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7477                                NL80211_REGDOM_TYPE_WORLD))
7478                         goto nla_put_failure;
7479         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7480                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7481                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7482                         goto nla_put_failure;
7483         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7484                    request->intersect) {
7485                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7486                                NL80211_REGDOM_TYPE_INTERSECTION))
7487                         goto nla_put_failure;
7488         } else {
7489                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7490                                NL80211_REGDOM_TYPE_COUNTRY) ||
7491                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7492                                    request->alpha2))
7493                         goto nla_put_failure;
7494         }
7495
7496         if (wiphy_idx_valid(request->wiphy_idx) &&
7497             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7498                 goto nla_put_failure;
7499
7500         genlmsg_end(msg, hdr);
7501
7502         rcu_read_lock();
7503         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7504                                 GFP_ATOMIC);
7505         rcu_read_unlock();
7506
7507         return;
7508
7509 nla_put_failure:
7510         genlmsg_cancel(msg, hdr);
7511         nlmsg_free(msg);
7512 }
7513
7514 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7515                                     struct net_device *netdev,
7516                                     const u8 *buf, size_t len,
7517                                     enum nl80211_commands cmd, gfp_t gfp)
7518 {
7519         struct sk_buff *msg;
7520         void *hdr;
7521
7522         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7523         if (!msg)
7524                 return;
7525
7526         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7527         if (!hdr) {
7528                 nlmsg_free(msg);
7529                 return;
7530         }
7531
7532         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7533             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7534             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7535                 goto nla_put_failure;
7536
7537         genlmsg_end(msg, hdr);
7538
7539         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7540                                 nl80211_mlme_mcgrp.id, gfp);
7541         return;
7542
7543  nla_put_failure:
7544         genlmsg_cancel(msg, hdr);
7545         nlmsg_free(msg);
7546 }
7547
7548 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7549                           struct net_device *netdev, const u8 *buf,
7550                           size_t len, gfp_t gfp)
7551 {
7552         nl80211_send_mlme_event(rdev, netdev, buf, len,
7553                                 NL80211_CMD_AUTHENTICATE, gfp);
7554 }
7555
7556 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7557                            struct net_device *netdev, const u8 *buf,
7558                            size_t len, gfp_t gfp)
7559 {
7560         nl80211_send_mlme_event(rdev, netdev, buf, len,
7561                                 NL80211_CMD_ASSOCIATE, gfp);
7562 }
7563
7564 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7565                          struct net_device *netdev, const u8 *buf,
7566                          size_t len, gfp_t gfp)
7567 {
7568         nl80211_send_mlme_event(rdev, netdev, buf, len,
7569                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7570 }
7571
7572 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7573                            struct net_device *netdev, const u8 *buf,
7574                            size_t len, gfp_t gfp)
7575 {
7576         nl80211_send_mlme_event(rdev, netdev, buf, len,
7577                                 NL80211_CMD_DISASSOCIATE, gfp);
7578 }
7579
7580 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7581                                 struct net_device *netdev, const u8 *buf,
7582                                 size_t len, gfp_t gfp)
7583 {
7584         nl80211_send_mlme_event(rdev, netdev, buf, len,
7585                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7586 }
7587
7588 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7589                                   struct net_device *netdev, const u8 *buf,
7590                                   size_t len, gfp_t gfp)
7591 {
7592         nl80211_send_mlme_event(rdev, netdev, buf, len,
7593                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7594 }
7595
7596 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7597                                       struct net_device *netdev, int cmd,
7598                                       const u8 *addr, gfp_t gfp)
7599 {
7600         struct sk_buff *msg;
7601         void *hdr;
7602
7603         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7604         if (!msg)
7605                 return;
7606
7607         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7608         if (!hdr) {
7609                 nlmsg_free(msg);
7610                 return;
7611         }
7612
7613         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7614             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7615             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7616             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7617                 goto nla_put_failure;
7618
7619         genlmsg_end(msg, hdr);
7620
7621         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7622                                 nl80211_mlme_mcgrp.id, gfp);
7623         return;
7624
7625  nla_put_failure:
7626         genlmsg_cancel(msg, hdr);
7627         nlmsg_free(msg);
7628 }
7629
7630 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7631                                struct net_device *netdev, const u8 *addr,
7632                                gfp_t gfp)
7633 {
7634         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7635                                   addr, gfp);
7636 }
7637
7638 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7639                                 struct net_device *netdev, const u8 *addr,
7640                                 gfp_t gfp)
7641 {
7642         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7643                                   addr, gfp);
7644 }
7645
7646 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7647                                  struct net_device *netdev, const u8 *bssid,
7648                                  const u8 *req_ie, size_t req_ie_len,
7649                                  const u8 *resp_ie, size_t resp_ie_len,
7650                                  u16 status, gfp_t gfp)
7651 {
7652         struct sk_buff *msg;
7653         void *hdr;
7654
7655         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7656         if (!msg)
7657                 return;
7658
7659         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7660         if (!hdr) {
7661                 nlmsg_free(msg);
7662                 return;
7663         }
7664
7665         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7666             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7667             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7668             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7669             (req_ie &&
7670              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7671             (resp_ie &&
7672              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7673                 goto nla_put_failure;
7674
7675         genlmsg_end(msg, hdr);
7676
7677         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7678                                 nl80211_mlme_mcgrp.id, gfp);
7679         return;
7680
7681  nla_put_failure:
7682         genlmsg_cancel(msg, hdr);
7683         nlmsg_free(msg);
7684
7685 }
7686
7687 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7688                          struct net_device *netdev, const u8 *bssid,
7689                          const u8 *req_ie, size_t req_ie_len,
7690                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7691 {
7692         struct sk_buff *msg;
7693         void *hdr;
7694
7695         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7696         if (!msg)
7697                 return;
7698
7699         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7700         if (!hdr) {
7701                 nlmsg_free(msg);
7702                 return;
7703         }
7704
7705         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7706             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7707             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7708             (req_ie &&
7709              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7710             (resp_ie &&
7711              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7712                 goto nla_put_failure;
7713
7714         genlmsg_end(msg, hdr);
7715
7716         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7717                                 nl80211_mlme_mcgrp.id, gfp);
7718         return;
7719
7720  nla_put_failure:
7721         genlmsg_cancel(msg, hdr);
7722         nlmsg_free(msg);
7723
7724 }
7725
7726 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7727                                struct net_device *netdev, u16 reason,
7728                                const u8 *ie, size_t ie_len, bool from_ap)
7729 {
7730         struct sk_buff *msg;
7731         void *hdr;
7732
7733         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7734         if (!msg)
7735                 return;
7736
7737         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7738         if (!hdr) {
7739                 nlmsg_free(msg);
7740                 return;
7741         }
7742
7743         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7744             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7745             (from_ap && reason &&
7746              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7747             (from_ap &&
7748              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7749             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7750                 goto nla_put_failure;
7751
7752         genlmsg_end(msg, hdr);
7753
7754         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7755                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7756         return;
7757
7758  nla_put_failure:
7759         genlmsg_cancel(msg, hdr);
7760         nlmsg_free(msg);
7761
7762 }
7763
7764 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7765                              struct net_device *netdev, const u8 *bssid,
7766                              gfp_t gfp)
7767 {
7768         struct sk_buff *msg;
7769         void *hdr;
7770
7771         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7772         if (!msg)
7773                 return;
7774
7775         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7776         if (!hdr) {
7777                 nlmsg_free(msg);
7778                 return;
7779         }
7780
7781         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7782             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7783             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7784                 goto nla_put_failure;
7785
7786         genlmsg_end(msg, hdr);
7787
7788         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7789                                 nl80211_mlme_mcgrp.id, gfp);
7790         return;
7791
7792  nla_put_failure:
7793         genlmsg_cancel(msg, hdr);
7794         nlmsg_free(msg);
7795 }
7796
7797 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7798                 struct net_device *netdev,
7799                 const u8 *macaddr, const u8* ie, u8 ie_len,
7800                 gfp_t gfp)
7801 {
7802         struct sk_buff *msg;
7803         void *hdr;
7804
7805         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7806         if (!msg)
7807                 return;
7808
7809         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7810         if (!hdr) {
7811                 nlmsg_free(msg);
7812                 return;
7813         }
7814
7815         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7816             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7817             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7818             (ie_len && ie &&
7819              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7820                 goto nla_put_failure;
7821
7822         genlmsg_end(msg, hdr);
7823
7824         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7825                                 nl80211_mlme_mcgrp.id, gfp);
7826         return;
7827
7828  nla_put_failure:
7829         genlmsg_cancel(msg, hdr);
7830         nlmsg_free(msg);
7831 }
7832
7833 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7834                                  struct net_device *netdev, const u8 *addr,
7835                                  enum nl80211_key_type key_type, int key_id,
7836                                  const u8 *tsc, gfp_t gfp)
7837 {
7838         struct sk_buff *msg;
7839         void *hdr;
7840
7841         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7842         if (!msg)
7843                 return;
7844
7845         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7846         if (!hdr) {
7847                 nlmsg_free(msg);
7848                 return;
7849         }
7850
7851         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7852             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7853             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7854             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7855             (key_id != -1 &&
7856              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7857             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7858                 goto nla_put_failure;
7859
7860         genlmsg_end(msg, hdr);
7861
7862         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7863                                 nl80211_mlme_mcgrp.id, gfp);
7864         return;
7865
7866  nla_put_failure:
7867         genlmsg_cancel(msg, hdr);
7868         nlmsg_free(msg);
7869 }
7870
7871 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7872                                     struct ieee80211_channel *channel_before,
7873                                     struct ieee80211_channel *channel_after)
7874 {
7875         struct sk_buff *msg;
7876         void *hdr;
7877         struct nlattr *nl_freq;
7878
7879         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7880         if (!msg)
7881                 return;
7882
7883         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7884         if (!hdr) {
7885                 nlmsg_free(msg);
7886                 return;
7887         }
7888
7889         /*
7890          * Since we are applying the beacon hint to a wiphy we know its
7891          * wiphy_idx is valid
7892          */
7893         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7894                 goto nla_put_failure;
7895
7896         /* Before */
7897         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7898         if (!nl_freq)
7899                 goto nla_put_failure;
7900         if (nl80211_msg_put_channel(msg, channel_before))
7901                 goto nla_put_failure;
7902         nla_nest_end(msg, nl_freq);
7903
7904         /* After */
7905         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7906         if (!nl_freq)
7907                 goto nla_put_failure;
7908         if (nl80211_msg_put_channel(msg, channel_after))
7909                 goto nla_put_failure;
7910         nla_nest_end(msg, nl_freq);
7911
7912         genlmsg_end(msg, hdr);
7913
7914         rcu_read_lock();
7915         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7916                                 GFP_ATOMIC);
7917         rcu_read_unlock();
7918
7919         return;
7920
7921 nla_put_failure:
7922         genlmsg_cancel(msg, hdr);
7923         nlmsg_free(msg);
7924 }
7925
7926 static void nl80211_send_remain_on_chan_event(
7927         int cmd, struct cfg80211_registered_device *rdev,
7928         struct net_device *netdev, u64 cookie,
7929         struct ieee80211_channel *chan,
7930         enum nl80211_channel_type channel_type,
7931         unsigned int duration, gfp_t gfp)
7932 {
7933         struct sk_buff *msg;
7934         void *hdr;
7935
7936         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7937         if (!msg)
7938                 return;
7939
7940         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7941         if (!hdr) {
7942                 nlmsg_free(msg);
7943                 return;
7944         }
7945
7946         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7947             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7948             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7949             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7950             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7951                 goto nla_put_failure;
7952
7953         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7954             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7955                 goto nla_put_failure;
7956
7957         genlmsg_end(msg, hdr);
7958
7959         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7960                                 nl80211_mlme_mcgrp.id, gfp);
7961         return;
7962
7963  nla_put_failure:
7964         genlmsg_cancel(msg, hdr);
7965         nlmsg_free(msg);
7966 }
7967
7968 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7969                                     struct net_device *netdev, u64 cookie,
7970                                     struct ieee80211_channel *chan,
7971                                     enum nl80211_channel_type channel_type,
7972                                     unsigned int duration, gfp_t gfp)
7973 {
7974         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7975                                           rdev, netdev, cookie, chan,
7976                                           channel_type, duration, gfp);
7977 }
7978
7979 void nl80211_send_remain_on_channel_cancel(
7980         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7981         u64 cookie, struct ieee80211_channel *chan,
7982         enum nl80211_channel_type channel_type, gfp_t gfp)
7983 {
7984         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7985                                           rdev, netdev, cookie, chan,
7986                                           channel_type, 0, gfp);
7987 }
7988
7989 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7990                             struct net_device *dev, const u8 *mac_addr,
7991                             struct station_info *sinfo, gfp_t gfp)
7992 {
7993         struct sk_buff *msg;
7994
7995         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7996         if (!msg)
7997                 return;
7998
7999         if (nl80211_send_station(msg, 0, 0, 0,
8000                                  rdev, dev, mac_addr, sinfo) < 0) {
8001                 nlmsg_free(msg);
8002                 return;
8003         }
8004
8005         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8006                                 nl80211_mlme_mcgrp.id, gfp);
8007 }
8008
8009 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8010                                 struct net_device *dev, const u8 *mac_addr,
8011                                 gfp_t gfp)
8012 {
8013         struct sk_buff *msg;
8014         void *hdr;
8015
8016         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8017         if (!msg)
8018                 return;
8019
8020         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8021         if (!hdr) {
8022                 nlmsg_free(msg);
8023                 return;
8024         }
8025
8026         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8027             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8028                 goto nla_put_failure;
8029
8030         genlmsg_end(msg, hdr);
8031
8032         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8033                                 nl80211_mlme_mcgrp.id, gfp);
8034         return;
8035
8036  nla_put_failure:
8037         genlmsg_cancel(msg, hdr);
8038         nlmsg_free(msg);
8039 }
8040
8041 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8042                                        const u8 *addr, gfp_t gfp)
8043 {
8044         struct wireless_dev *wdev = dev->ieee80211_ptr;
8045         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8046         struct sk_buff *msg;
8047         void *hdr;
8048         int err;
8049         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8050
8051         if (!nlpid)
8052                 return false;
8053
8054         msg = nlmsg_new(100, gfp);
8055         if (!msg)
8056                 return true;
8057
8058         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8059         if (!hdr) {
8060                 nlmsg_free(msg);
8061                 return true;
8062         }
8063
8064         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8065             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8066             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8067                 goto nla_put_failure;
8068
8069         err = genlmsg_end(msg, hdr);
8070         if (err < 0) {
8071                 nlmsg_free(msg);
8072                 return true;
8073         }
8074
8075         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8076         return true;
8077
8078  nla_put_failure:
8079         genlmsg_cancel(msg, hdr);
8080         nlmsg_free(msg);
8081         return true;
8082 }
8083
8084 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8085 {
8086         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8087                                           addr, gfp);
8088 }
8089
8090 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8091                                     const u8 *addr, gfp_t gfp)
8092 {
8093         return __nl80211_unexpected_frame(dev,
8094                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8095                                           addr, gfp);
8096 }
8097
8098 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8099                       struct net_device *netdev, u32 nlpid,
8100                       int freq, int sig_dbm,
8101                       const u8 *buf, size_t len, gfp_t gfp)
8102 {
8103         struct sk_buff *msg;
8104         void *hdr;
8105
8106         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8107         if (!msg)
8108                 return -ENOMEM;
8109
8110         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8111         if (!hdr) {
8112                 nlmsg_free(msg);
8113                 return -ENOMEM;
8114         }
8115
8116         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8117             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8118             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8119             (sig_dbm &&
8120              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8121             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8122                 goto nla_put_failure;
8123
8124         genlmsg_end(msg, hdr);
8125
8126         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8127
8128  nla_put_failure:
8129         genlmsg_cancel(msg, hdr);
8130         nlmsg_free(msg);
8131         return -ENOBUFS;
8132 }
8133
8134 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8135                                  struct net_device *netdev, u64 cookie,
8136                                  const u8 *buf, size_t len, bool ack,
8137                                  gfp_t gfp)
8138 {
8139         struct sk_buff *msg;
8140         void *hdr;
8141
8142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8143         if (!msg)
8144                 return;
8145
8146         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8147         if (!hdr) {
8148                 nlmsg_free(msg);
8149                 return;
8150         }
8151
8152         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8153             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8154             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8155             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8156             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8157                 goto nla_put_failure;
8158
8159         genlmsg_end(msg, hdr);
8160
8161         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8162         return;
8163
8164  nla_put_failure:
8165         genlmsg_cancel(msg, hdr);
8166         nlmsg_free(msg);
8167 }
8168
8169 void
8170 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8171                              struct net_device *netdev,
8172                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8173                              gfp_t gfp)
8174 {
8175         struct sk_buff *msg;
8176         struct nlattr *pinfoattr;
8177         void *hdr;
8178
8179         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8180         if (!msg)
8181                 return;
8182
8183         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8184         if (!hdr) {
8185                 nlmsg_free(msg);
8186                 return;
8187         }
8188
8189         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8190             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8191                 goto nla_put_failure;
8192
8193         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8194         if (!pinfoattr)
8195                 goto nla_put_failure;
8196
8197         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8198                         rssi_event))
8199                 goto nla_put_failure;
8200
8201         nla_nest_end(msg, pinfoattr);
8202
8203         genlmsg_end(msg, hdr);
8204
8205         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8206                                 nl80211_mlme_mcgrp.id, gfp);
8207         return;
8208
8209  nla_put_failure:
8210         genlmsg_cancel(msg, hdr);
8211         nlmsg_free(msg);
8212 }
8213
8214 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8215                               struct net_device *netdev, const u8 *bssid,
8216                               const u8 *replay_ctr, gfp_t gfp)
8217 {
8218         struct sk_buff *msg;
8219         struct nlattr *rekey_attr;
8220         void *hdr;
8221
8222         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8223         if (!msg)
8224                 return;
8225
8226         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8227         if (!hdr) {
8228                 nlmsg_free(msg);
8229                 return;
8230         }
8231
8232         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8233             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8234             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8235                 goto nla_put_failure;
8236
8237         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8238         if (!rekey_attr)
8239                 goto nla_put_failure;
8240
8241         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8242                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8243                 goto nla_put_failure;
8244
8245         nla_nest_end(msg, rekey_attr);
8246
8247         genlmsg_end(msg, hdr);
8248
8249         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8250                                 nl80211_mlme_mcgrp.id, gfp);
8251         return;
8252
8253  nla_put_failure:
8254         genlmsg_cancel(msg, hdr);
8255         nlmsg_free(msg);
8256 }
8257
8258 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8259                                     struct net_device *netdev, int index,
8260                                     const u8 *bssid, bool preauth, gfp_t gfp)
8261 {
8262         struct sk_buff *msg;
8263         struct nlattr *attr;
8264         void *hdr;
8265
8266         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8267         if (!msg)
8268                 return;
8269
8270         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8271         if (!hdr) {
8272                 nlmsg_free(msg);
8273                 return;
8274         }
8275
8276         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8277             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8278                 goto nla_put_failure;
8279
8280         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8281         if (!attr)
8282                 goto nla_put_failure;
8283
8284         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8285             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8286             (preauth &&
8287              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8288                 goto nla_put_failure;
8289
8290         nla_nest_end(msg, attr);
8291
8292         genlmsg_end(msg, hdr);
8293
8294         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8295                                 nl80211_mlme_mcgrp.id, gfp);
8296         return;
8297
8298  nla_put_failure:
8299         genlmsg_cancel(msg, hdr);
8300         nlmsg_free(msg);
8301 }
8302
8303 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8304                               struct net_device *netdev, int freq,
8305                               enum nl80211_channel_type type, gfp_t gfp)
8306 {
8307         struct sk_buff *msg;
8308         void *hdr;
8309
8310         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8311         if (!msg)
8312                 return;
8313
8314         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8315         if (!hdr) {
8316                 nlmsg_free(msg);
8317                 return;
8318         }
8319
8320         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8321             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8322             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8323                 goto nla_put_failure;
8324
8325         genlmsg_end(msg, hdr);
8326
8327         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8328                                 nl80211_mlme_mcgrp.id, gfp);
8329         return;
8330
8331  nla_put_failure:
8332         genlmsg_cancel(msg, hdr);
8333         nlmsg_free(msg);
8334 }
8335
8336 void
8337 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8338                                 struct net_device *netdev, const u8 *peer,
8339                                 u32 num_packets, gfp_t gfp)
8340 {
8341         struct sk_buff *msg;
8342         struct nlattr *pinfoattr;
8343         void *hdr;
8344
8345         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8346         if (!msg)
8347                 return;
8348
8349         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8350         if (!hdr) {
8351                 nlmsg_free(msg);
8352                 return;
8353         }
8354
8355         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8356             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8357             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8358                 goto nla_put_failure;
8359
8360         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8361         if (!pinfoattr)
8362                 goto nla_put_failure;
8363
8364         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8365                 goto nla_put_failure;
8366
8367         nla_nest_end(msg, pinfoattr);
8368
8369         genlmsg_end(msg, hdr);
8370
8371         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8372                                 nl80211_mlme_mcgrp.id, gfp);
8373         return;
8374
8375  nla_put_failure:
8376         genlmsg_cancel(msg, hdr);
8377         nlmsg_free(msg);
8378 }
8379
8380 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8381                            u64 cookie, bool acked, gfp_t gfp)
8382 {
8383         struct wireless_dev *wdev = dev->ieee80211_ptr;
8384         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8385         struct sk_buff *msg;
8386         void *hdr;
8387         int err;
8388
8389         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8390         if (!msg)
8391                 return;
8392
8393         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8394         if (!hdr) {
8395                 nlmsg_free(msg);
8396                 return;
8397         }
8398
8399         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8400             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8401             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8402             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8403             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8404                 goto nla_put_failure;
8405
8406         err = genlmsg_end(msg, hdr);
8407         if (err < 0) {
8408                 nlmsg_free(msg);
8409                 return;
8410         }
8411
8412         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8413                                 nl80211_mlme_mcgrp.id, gfp);
8414         return;
8415
8416  nla_put_failure:
8417         genlmsg_cancel(msg, hdr);
8418         nlmsg_free(msg);
8419 }
8420 EXPORT_SYMBOL(cfg80211_probe_status);
8421
8422 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8423                                  const u8 *frame, size_t len,
8424                                  int freq, int sig_dbm, gfp_t gfp)
8425 {
8426         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8427         struct sk_buff *msg;
8428         void *hdr;
8429         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8430
8431         if (!nlpid)
8432                 return;
8433
8434         msg = nlmsg_new(len + 100, gfp);
8435         if (!msg)
8436                 return;
8437
8438         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8439         if (!hdr) {
8440                 nlmsg_free(msg);
8441                 return;
8442         }
8443
8444         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8445             (freq &&
8446              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8447             (sig_dbm &&
8448              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8449             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8450                 goto nla_put_failure;
8451
8452         genlmsg_end(msg, hdr);
8453
8454         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8455         return;
8456
8457  nla_put_failure:
8458         genlmsg_cancel(msg, hdr);
8459         nlmsg_free(msg);
8460 }
8461 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8462
8463 static int nl80211_netlink_notify(struct notifier_block * nb,
8464                                   unsigned long state,
8465                                   void *_notify)
8466 {
8467         struct netlink_notify *notify = _notify;
8468         struct cfg80211_registered_device *rdev;
8469         struct wireless_dev *wdev;
8470
8471         if (state != NETLINK_URELEASE)
8472                 return NOTIFY_DONE;
8473
8474         rcu_read_lock();
8475
8476         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8477                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8478                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8479                 if (rdev->ap_beacons_nlpid == notify->pid)
8480                         rdev->ap_beacons_nlpid = 0;
8481         }
8482
8483         rcu_read_unlock();
8484
8485         return NOTIFY_DONE;
8486 }
8487
8488 static struct notifier_block nl80211_netlink_notifier = {
8489         .notifier_call = nl80211_netlink_notify,
8490 };
8491
8492 /* initialisation/exit functions */
8493
8494 int nl80211_init(void)
8495 {
8496         int err;
8497
8498         err = genl_register_family_with_ops(&nl80211_fam,
8499                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8500         if (err)
8501                 return err;
8502
8503         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8504         if (err)
8505                 goto err_out;
8506
8507         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8508         if (err)
8509                 goto err_out;
8510
8511         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8512         if (err)
8513                 goto err_out;
8514
8515         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8516         if (err)
8517                 goto err_out;
8518
8519 #ifdef CONFIG_NL80211_TESTMODE
8520         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8521         if (err)
8522                 goto err_out;
8523 #endif
8524
8525         err = netlink_register_notifier(&nl80211_netlink_notifier);
8526         if (err)
8527                 goto err_out;
8528
8529         return 0;
8530  err_out:
8531         genl_unregister_family(&nl80211_fam);
8532         return err;
8533 }
8534
8535 void nl80211_exit(void)
8536 {
8537         netlink_unregister_notifier(&nl80211_netlink_notifier);
8538         genl_unregister_family(&nl80211_fam);
8539 }