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 <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  41         .name = "nl80211",      /* have users key off the name instead */
  42         .hdrsize = 0,           /* no private header */
  43         .version = 1,           /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         assert_cfg80211_lock();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 mutex_lock(&rdev->devlist_mtx);
  84                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  85                         if (have_ifidx && wdev->netdev &&
  86                             wdev->netdev->ifindex == ifidx) {
  87                                 result = wdev;
  88                                 break;
  89                         }
  90                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  91                                 result = wdev;
  92                                 break;
  93                         }
  94                 }
  95                 mutex_unlock(&rdev->devlist_mtx);
  96
  97                 if (result)
  98                         break;
  99         }
 100
 101         if (result)
 102                 return result;
 103         return ERR_PTR(-ENODEV);
 104 }
 105
 106 static struct cfg80211_registered_device *
 107 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 108 {
 109         struct cfg80211_registered_device *rdev = NULL, *tmp;
 110         struct net_device *netdev;
 111
 112         assert_cfg80211_lock();
 113
 114         if (!attrs[NL80211_ATTR_WIPHY] &&
 115             !attrs[NL80211_ATTR_IFINDEX] &&
 116             !attrs[NL80211_ATTR_WDEV])
 117                 return ERR_PTR(-EINVAL);
 118
 119         if (attrs[NL80211_ATTR_WIPHY])
 120                 rdev = cfg80211_rdev_by_wiphy_idx(
 121                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 122
 123         if (attrs[NL80211_ATTR_WDEV]) {
 124                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 125                 struct wireless_dev *wdev;
 126                 bool found = false;
 127
 128                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 129                 if (tmp) {
 130                         /* make sure wdev exists */
 131                         mutex_lock(&tmp->devlist_mtx);
 132                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 133                                 if (wdev->identifier != (u32)wdev_id)
 134                                         continue;
 135                                 found = true;
 136                                 break;
 137                         }
 138                         mutex_unlock(&tmp->devlist_mtx);
 139
 140                         if (!found)
 141                                 tmp = NULL;
 142
 143                         if (rdev && tmp != rdev)
 144                                 return ERR_PTR(-EINVAL);
 145                         rdev = tmp;
 146                 }
 147         }
 148
 149         if (attrs[NL80211_ATTR_IFINDEX]) {
 150                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 151                 netdev = dev_get_by_index(netns, ifindex);
 152                 if (netdev) {
 153                         if (netdev->ieee80211_ptr)
 154                                 tmp = wiphy_to_dev(
 155                                                 netdev->ieee80211_ptr->wiphy);
 156                         else
 157                                 tmp = NULL;
 158
 159                         dev_put(netdev);
 160
 161                         /* not wireless device -- return error */
 162                         if (!tmp)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         /* mismatch -- return error */
 166                         if (rdev && tmp != rdev)
 167                                 return ERR_PTR(-EINVAL);
 168
 169                         rdev = tmp;
 170                 }
 171         }
 172
 173         if (!rdev)
 174                 return ERR_PTR(-ENODEV);
 175
 176         if (netns != wiphy_net(&rdev->wiphy))
 177                 return ERR_PTR(-ENODEV);
 178
 179         return rdev;
 180 }
 181
 182 /*
 183  * This function returns a pointer to the driver
 184  * that the genl_info item that is passed refers to.
 185  * If successful, it returns non-NULL and also locks
 186  * the driver's mutex!
 187  *
 188  * This means that you need to call cfg80211_unlock_rdev()
 189  * before being allowed to acquire &cfg80211_mutex!
 190  *
 191  * This is necessary because we need to lock the global
 192  * mutex to get an item off the list safely, and then
 193  * we lock the rdev mutex so it doesn't go away under us.
 194  *
 195  * We don't want to keep cfg80211_mutex locked
 196  * for all the time in order to allow requests on
 197  * other interfaces to go through at the same time.
 198  *
 199  * The result of this can be a PTR_ERR and hence must
 200  * be checked with IS_ERR() for errors.
 201  */
 202 static struct cfg80211_registered_device *
 203 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 204 {
 205         struct cfg80211_registered_device *rdev;
 206
 207         mutex_lock(&cfg80211_mutex);
 208         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 209
 210         /* if it is not an error we grab the lock on
 211          * it to assure it won't be going away while
 212          * we operate on it */
 213         if (!IS_ERR(rdev))
 214                 mutex_lock(&rdev->mtx);
 215
 216         mutex_unlock(&cfg80211_mutex);
 217
 218         return rdev;
 219 }
 220
 221 /* policy for the attributes */
 222 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 223         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 224         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 225                                       .len = 20-1 },
 226         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 227
 228         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 232         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 233
 234         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 236         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 238         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 239
 240         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 242         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 243
 244         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 245         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 246
 247         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 248         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 249                                     .len = WLAN_MAX_KEY_LEN },
 250         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 251         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 252         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 253         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 254         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 255
 256         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 257         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 258         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 259                                        .len = IEEE80211_MAX_DATA_LEN },
 260         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 261                                        .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 263         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 264         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 265         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 266                                                .len = NL80211_MAX_SUPP_RATES },
 267         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 268         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 269         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 270         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 271                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 272         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 273
 274         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 275         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 276
 277         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 280         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 281                                            .len = NL80211_MAX_SUPP_RATES },
 282         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 283
 284         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 286
 287         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 288
 289         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 290         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 291                               .len = IEEE80211_MAX_DATA_LEN },
 292         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 293         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 294
 295         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 296                                 .len = IEEE80211_MAX_SSID_LEN },
 297         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 298         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_STA_FLAGS2] = {
 303                 .len = sizeof(struct nl80211_sta_flag_update),
 304         },
 305         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 306         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 307         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 309         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 310         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 311         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 312         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 313         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 314                                  .len = WLAN_PMKID_LEN },
 315         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 316         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 317         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 319                                  .len = IEEE80211_MAX_DATA_LEN },
 320         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 321         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 323         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 326         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 327         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 330         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 331         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 335         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 336         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 339         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 340                                          .len = IEEE80211_MAX_DATA_LEN },
 341         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 342                                          .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 345         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 352         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 353                                       .len = IEEE80211_MAX_DATA_LEN },
 354         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 355         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 356         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 357                 .len = NL80211_HT_CAPABILITY_LEN
 358         },
 359         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 360         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 361         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 362         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 363         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 364         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 365         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 366         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 367         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 368         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 369         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 370         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 371         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 372         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 373 };
 374
 375 /* policy for the key attributes */
 376 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 377         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 378         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 379         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 380         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 381         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 382         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 383         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 384         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 385 };
 386
 387 /* policy for the key default flags */
 388 static const struct nla_policy
 389 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 390         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 391         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 392 };
 393
 394 /* policy for WoWLAN attributes */
 395 static const struct nla_policy
 396 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 397         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 398         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 400         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 401         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 402         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 403         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 404         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 405         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 406 };
 407
 408 static const struct nla_policy
 409 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 410         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 411         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 412         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 413         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 414         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 415         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 416         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 417                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 418         },
 419         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 420                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 421         },
 422         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 423         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 424         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 425 };
 426
 427 /* policy for GTK rekey offload attributes */
 428 static const struct nla_policy
 429 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 430         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 431         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 432         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 433 };
 434
 435 static const struct nla_policy
 436 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 437         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 438                                                  .len = IEEE80211_MAX_SSID_LEN },
 439         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 440 };
 441
 442 /* ifidx get helper */
 443 static int nl80211_get_ifidx(struct netlink_callback *cb)
 444 {
 445         int res;
 446
 447         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 448                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 449                           nl80211_policy);
 450         if (res)
 451                 return res;
 452
 453         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 454                 return -EINVAL;
 455
 456         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 457         if (!res)
 458                 return -EINVAL;
 459         return res;
 460 }
 461
 462 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 463                                        struct netlink_callback *cb,
 464                                        struct cfg80211_registered_device **rdev,
 465                                        struct net_device **dev)
 466 {
 467         int ifidx = cb->args[0];
 468         int err;
 469
 470         if (!ifidx)
 471                 ifidx = nl80211_get_ifidx(cb);
 472         if (ifidx < 0)
 473                 return ifidx;
 474
 475         cb->args[0] = ifidx;
 476
 477         rtnl_lock();
 478
 479         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 480         if (!*dev) {
 481                 err = -ENODEV;
 482                 goto out_rtnl;
 483         }
 484
 485         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 486         if (IS_ERR(*rdev)) {
 487                 err = PTR_ERR(*rdev);
 488                 goto out_rtnl;
 489         }
 490
 491         return 0;
 492  out_rtnl:
 493         rtnl_unlock();
 494         return err;
 495 }
 496
 497 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 498 {
 499         cfg80211_unlock_rdev(rdev);
 500         rtnl_unlock();
 501 }
 502
 503 /* IE validation */
 504 static bool is_valid_ie_attr(const struct nlattr *attr)
 505 {
 506         const u8 *pos;
 507         int len;
 508
 509         if (!attr)
 510                 return true;
 511
 512         pos = nla_data(attr);
 513         len = nla_len(attr);
 514
 515         while (len) {
 516                 u8 elemlen;
 517
 518                 if (len < 2)
 519                         return false;
 520                 len -= 2;
 521
 522                 elemlen = pos[1];
 523                 if (elemlen > len)
 524                         return false;
 525
 526                 len -= elemlen;
 527                 pos += 2 + elemlen;
 528         }
 529
 530         return true;
 531 }
 532
 533 /* message building helper */
 534 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 535                                    int flags, u8 cmd)
 536 {
 537         /* since there is no private header just add the generic one */
 538         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 539 }
 540
 541 static int nl80211_msg_put_channel(struct sk_buff *msg,
 542                                    struct ieee80211_channel *chan)
 543 {
 544         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 545                         chan->center_freq))
 546                 goto nla_put_failure;
 547
 548         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 549             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 550                 goto nla_put_failure;
 551         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 552             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 553                 goto nla_put_failure;
 554         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 555             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 556                 goto nla_put_failure;
 557         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 558             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 559                 goto nla_put_failure;
 560
 561         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 562                         DBM_TO_MBM(chan->max_power)))
 563                 goto nla_put_failure;
 564
 565         return 0;
 566
 567  nla_put_failure:
 568         return -ENOBUFS;
 569 }
 570
 571 /* netlink command implementations */
 572
 573 struct key_parse {
 574         struct key_params p;
 575         int idx;
 576         int type;
 577         bool def, defmgmt;
 578         bool def_uni, def_multi;
 579 };
 580
 581 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 582 {
 583         struct nlattr *tb[NL80211_KEY_MAX + 1];
 584         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 585                                    nl80211_key_policy);
 586         if (err)
 587                 return err;
 588
 589         k->def = !!tb[NL80211_KEY_DEFAULT];
 590         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 591
 592         if (k->def) {
 593                 k->def_uni = true;
 594                 k->def_multi = true;
 595         }
 596         if (k->defmgmt)
 597                 k->def_multi = true;
 598
 599         if (tb[NL80211_KEY_IDX])
 600                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 601
 602         if (tb[NL80211_KEY_DATA]) {
 603                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 604                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 605         }
 606
 607         if (tb[NL80211_KEY_SEQ]) {
 608                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 609                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 610         }
 611
 612         if (tb[NL80211_KEY_CIPHER])
 613                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 614
 615         if (tb[NL80211_KEY_TYPE]) {
 616                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 617                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 618                         return -EINVAL;
 619         }
 620
 621         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 622                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 623                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 624                                        tb[NL80211_KEY_DEFAULT_TYPES],
 625                                        nl80211_key_default_policy);
 626                 if (err)
 627                         return err;
 628
 629                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 630                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 631         }
 632
 633         return 0;
 634 }
 635
 636 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 637 {
 638         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 639                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 640                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 641         }
 642
 643         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 644                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 645                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 646         }
 647
 648         if (info->attrs[NL80211_ATTR_KEY_IDX])
 649                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 650
 651         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 652                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 653
 654         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 655         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 656
 657         if (k->def) {
 658                 k->def_uni = true;
 659                 k->def_multi = true;
 660         }
 661         if (k->defmgmt)
 662                 k->def_multi = true;
 663
 664         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 665                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 666                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 667                         return -EINVAL;
 668         }
 669
 670         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 671                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 672                 int err = nla_parse_nested(
 673                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 674                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 675                                 nl80211_key_default_policy);
 676                 if (err)
 677                         return err;
 678
 679                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 680                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 681         }
 682
 683         return 0;
 684 }
 685
 686 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 687 {
 688         int err;
 689
 690         memset(k, 0, sizeof(*k));
 691         k->idx = -1;
 692         k->type = -1;
 693
 694         if (info->attrs[NL80211_ATTR_KEY])
 695                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 696         else
 697                 err = nl80211_parse_key_old(info, k);
 698
 699         if (err)
 700                 return err;
 701
 702         if (k->def && k->defmgmt)
 703                 return -EINVAL;
 704
 705         if (k->defmgmt) {
 706                 if (k->def_uni || !k->def_multi)
 707                         return -EINVAL;
 708         }
 709
 710         if (k->idx != -1) {
 711                 if (k->defmgmt) {
 712                         if (k->idx < 4 || k->idx > 5)
 713                                 return -EINVAL;
 714                 } else if (k->def) {
 715                         if (k->idx < 0 || k->idx > 3)
 716                                 return -EINVAL;
 717                 } else {
 718                         if (k->idx < 0 || k->idx > 5)
 719                                 return -EINVAL;
 720                 }
 721         }
 722
 723         return 0;
 724 }
 725
 726 static struct cfg80211_cached_keys *
 727 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 728                        struct nlattr *keys, bool *no_ht)
 729 {
 730         struct key_parse parse;
 731         struct nlattr *key;
 732         struct cfg80211_cached_keys *result;
 733         int rem, err, def = 0;
 734
 735         result = kzalloc(sizeof(*result), GFP_KERNEL);
 736         if (!result)
 737                 return ERR_PTR(-ENOMEM);
 738
 739         result->def = -1;
 740         result->defmgmt = -1;
 741
 742         nla_for_each_nested(key, keys, rem) {
 743                 memset(&parse, 0, sizeof(parse));
 744                 parse.idx = -1;
 745
 746                 err = nl80211_parse_key_new(key, &parse);
 747                 if (err)
 748                         goto error;
 749                 err = -EINVAL;
 750                 if (!parse.p.key)
 751                         goto error;
 752                 if (parse.idx < 0 || parse.idx > 4)
 753                         goto error;
 754                 if (parse.def) {
 755                         if (def)
 756                                 goto error;
 757                         def = 1;
 758                         result->def = parse.idx;
 759                         if (!parse.def_uni || !parse.def_multi)
 760                                 goto error;
 761                 } else if (parse.defmgmt)
 762                         goto error;
 763                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 764                                                      parse.idx, false, NULL);
 765                 if (err)
 766                         goto error;
 767                 result->params[parse.idx].cipher = parse.p.cipher;
 768                 result->params[parse.idx].key_len = parse.p.key_len;
 769                 result->params[parse.idx].key = result->data[parse.idx];
 770                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 771
 772                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 773                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 774                         if (no_ht)
 775                                 *no_ht = true;
 776                 }
 777         }
 778
 779         return result;
 780  error:
 781         kfree(result);
 782         return ERR_PTR(err);
 783 }
 784
 785 static int nl80211_key_allowed(struct wireless_dev *wdev)
 786 {
 787         ASSERT_WDEV_LOCK(wdev);
 788
 789         switch (wdev->iftype) {
 790         case NL80211_IFTYPE_AP:
 791         case NL80211_IFTYPE_AP_VLAN:
 792         case NL80211_IFTYPE_P2P_GO:
 793         case NL80211_IFTYPE_MESH_POINT:
 794                 break;
 795         case NL80211_IFTYPE_ADHOC:
 796                 if (!wdev->current_bss)
 797                         return -ENOLINK;
 798                 break;
 799         case NL80211_IFTYPE_STATION:
 800         case NL80211_IFTYPE_P2P_CLIENT:
 801                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 802                         return -ENOLINK;
 803                 break;
 804         default:
 805                 return -EINVAL;
 806         }
 807
 808         return 0;
 809 }
 810
 811 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 812 {
 813         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 814         int i;
 815
 816         if (!nl_modes)
 817                 goto nla_put_failure;
 818
 819         i = 0;
 820         while (ifmodes) {
 821                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 822                         goto nla_put_failure;
 823                 ifmodes >>= 1;
 824                 i++;
 825         }
 826
 827         nla_nest_end(msg, nl_modes);
 828         return 0;
 829
 830 nla_put_failure:
 831         return -ENOBUFS;
 832 }
 833
 834 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 835                                           struct sk_buff *msg)
 836 {
 837         struct nlattr *nl_combis;
 838         int i, j;
 839
 840         nl_combis = nla_nest_start(msg,
 841                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 842         if (!nl_combis)
 843                 goto nla_put_failure;
 844
 845         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 846                 const struct ieee80211_iface_combination *c;
 847                 struct nlattr *nl_combi, *nl_limits;
 848
 849                 c = &wiphy->iface_combinations[i];
 850
 851                 nl_combi = nla_nest_start(msg, i + 1);
 852                 if (!nl_combi)
 853                         goto nla_put_failure;
 854
 855                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 856                 if (!nl_limits)
 857                         goto nla_put_failure;
 858
 859                 for (j = 0; j < c->n_limits; j++) {
 860                         struct nlattr *nl_limit;
 861
 862                         nl_limit = nla_nest_start(msg, j + 1);
 863                         if (!nl_limit)
 864                                 goto nla_put_failure;
 865                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 866                                         c->limits[j].max))
 867                                 goto nla_put_failure;
 868                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 869                                                 c->limits[j].types))
 870                                 goto nla_put_failure;
 871                         nla_nest_end(msg, nl_limit);
 872                 }
 873
 874                 nla_nest_end(msg, nl_limits);
 875
 876                 if (c->beacon_int_infra_match &&
 877                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 878                         goto nla_put_failure;
 879                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 880                                 c->num_different_channels) ||
 881                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 882                                 c->max_interfaces))
 883                         goto nla_put_failure;
 884
 885                 nla_nest_end(msg, nl_combi);
 886         }
 887
 888         nla_nest_end(msg, nl_combis);
 889
 890         return 0;
 891 nla_put_failure:
 892         return -ENOBUFS;
 893 }
 894
 895 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 896                               struct cfg80211_registered_device *dev)
 897 {
 898         void *hdr;
 899         struct nlattr *nl_bands, *nl_band;
 900         struct nlattr *nl_freqs, *nl_freq;
 901         struct nlattr *nl_rates, *nl_rate;
 902         struct nlattr *nl_cmds;
 903         enum ieee80211_band band;
 904         struct ieee80211_channel *chan;
 905         struct ieee80211_rate *rate;
 906         int i;
 907         const struct ieee80211_txrx_stypes *mgmt_stypes =
 908                                 dev->wiphy.mgmt_stypes;
 909
 910         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 911         if (!hdr)
 912                 return -1;
 913
 914         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 915             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 916             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 917                         cfg80211_rdev_list_generation) ||
 918             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 919                        dev->wiphy.retry_short) ||
 920             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 921                        dev->wiphy.retry_long) ||
 922             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 923                         dev->wiphy.frag_threshold) ||
 924             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 925                         dev->wiphy.rts_threshold) ||
 926             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 927                        dev->wiphy.coverage_class) ||
 928             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 929                        dev->wiphy.max_scan_ssids) ||
 930             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 931                        dev->wiphy.max_sched_scan_ssids) ||
 932             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 933                         dev->wiphy.max_scan_ie_len) ||
 934             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 935                         dev->wiphy.max_sched_scan_ie_len) ||
 936             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 937                        dev->wiphy.max_match_sets))
 938                 goto nla_put_failure;
 939
 940         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 941             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 942                 goto nla_put_failure;
 943         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 944             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 945                 goto nla_put_failure;
 946         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 947             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 948                 goto nla_put_failure;
 949         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 950             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 951                 goto nla_put_failure;
 952         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 953             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 954                 goto nla_put_failure;
 955         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 956             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 957                 goto nla_put_failure;
 958
 959         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 960                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 961                     dev->wiphy.cipher_suites))
 962                 goto nla_put_failure;
 963
 964         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 965                        dev->wiphy.max_num_pmkids))
 966                 goto nla_put_failure;
 967
 968         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 969             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 970                 goto nla_put_failure;
 971
 972         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 973                         dev->wiphy.available_antennas_tx) ||
 974             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 975                         dev->wiphy.available_antennas_rx))
 976                 goto nla_put_failure;
 977
 978         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 979             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 980                         dev->wiphy.probe_resp_offload))
 981                 goto nla_put_failure;
 982
 983         if ((dev->wiphy.available_antennas_tx ||
 984              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 985                 u32 tx_ant = 0, rx_ant = 0;
 986                 int res;
 987                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 988                 if (!res) {
 989                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 990                                         tx_ant) ||
 991                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 992                                         rx_ant))
 993                                 goto nla_put_failure;
 994                 }
 995         }
 996
 997         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 998                                 dev->wiphy.interface_modes))
 999                 goto nla_put_failure;
1000
1001         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1002         if (!nl_bands)
1003                 goto nla_put_failure;
1004
1005         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1006                 if (!dev->wiphy.bands[band])
1007                         continue;
1008
1009                 nl_band = nla_nest_start(msg, band);
1010                 if (!nl_band)
1011                         goto nla_put_failure;
1012
1013                 /* add HT info */
1014                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
1015                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1016                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
1017                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
1018                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1019                                  dev->wiphy.bands[band]->ht_cap.cap) ||
1020                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1021                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
1022                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1023                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
1024                         goto nla_put_failure;
1025
1026                 /* add VHT info */
1027                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1028                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1029                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1030                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1031                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1032                                  dev->wiphy.bands[band]->vht_cap.cap)))
1033                         goto nla_put_failure;
1034
1035                 /* add frequencies */
1036                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1037                 if (!nl_freqs)
1038                         goto nla_put_failure;
1039
1040                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1041                         nl_freq = nla_nest_start(msg, i);
1042                         if (!nl_freq)
1043                                 goto nla_put_failure;
1044
1045                         chan = &dev->wiphy.bands[band]->channels[i];
1046
1047                         if (nl80211_msg_put_channel(msg, chan))
1048                                 goto nla_put_failure;
1049
1050                         nla_nest_end(msg, nl_freq);
1051                 }
1052
1053                 nla_nest_end(msg, nl_freqs);
1054
1055                 /* add bitrates */
1056                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1057                 if (!nl_rates)
1058                         goto nla_put_failure;
1059
1060                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1061                         nl_rate = nla_nest_start(msg, i);
1062                         if (!nl_rate)
1063                                 goto nla_put_failure;
1064
1065                         rate = &dev->wiphy.bands[band]->bitrates[i];
1066                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1067                                         rate->bitrate))
1068                                 goto nla_put_failure;
1069                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1070                             nla_put_flag(msg,
1071                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1072                                 goto nla_put_failure;
1073
1074                         nla_nest_end(msg, nl_rate);
1075                 }
1076
1077                 nla_nest_end(msg, nl_rates);
1078
1079                 nla_nest_end(msg, nl_band);
1080         }
1081         nla_nest_end(msg, nl_bands);
1082
1083         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1084         if (!nl_cmds)
1085                 goto nla_put_failure;
1086
1087         i = 0;
1088 #define CMD(op, n)                                              \
1089          do {                                                   \
1090                 if (dev->ops->op) {                             \
1091                         i++;                                    \
1092                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1093                                 goto nla_put_failure;           \
1094                 }                                               \
1095         } while (0)
1096
1097         CMD(add_virtual_intf, NEW_INTERFACE);
1098         CMD(change_virtual_intf, SET_INTERFACE);
1099         CMD(add_key, NEW_KEY);
1100         CMD(start_ap, START_AP);
1101         CMD(add_station, NEW_STATION);
1102         CMD(add_mpath, NEW_MPATH);
1103         CMD(update_mesh_config, SET_MESH_CONFIG);
1104         CMD(change_bss, SET_BSS);
1105         CMD(auth, AUTHENTICATE);
1106         CMD(assoc, ASSOCIATE);
1107         CMD(deauth, DEAUTHENTICATE);
1108         CMD(disassoc, DISASSOCIATE);
1109         CMD(join_ibss, JOIN_IBSS);
1110         CMD(join_mesh, JOIN_MESH);
1111         CMD(set_pmksa, SET_PMKSA);
1112         CMD(del_pmksa, DEL_PMKSA);
1113         CMD(flush_pmksa, FLUSH_PMKSA);
1114         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1115                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1116         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1117         CMD(mgmt_tx, FRAME);
1118         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1119         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1120                 i++;
1121                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1122                         goto nla_put_failure;
1123         }
1124         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1125             dev->ops->join_mesh) {
1126                 i++;
1127                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1128                         goto nla_put_failure;
1129         }
1130         CMD(set_wds_peer, SET_WDS_PEER);
1131         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1132                 CMD(tdls_mgmt, TDLS_MGMT);
1133                 CMD(tdls_oper, TDLS_OPER);
1134         }
1135         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1136                 CMD(sched_scan_start, START_SCHED_SCAN);
1137         CMD(probe_client, PROBE_CLIENT);
1138         CMD(set_noack_map, SET_NOACK_MAP);
1139         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1140                 i++;
1141                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1142                         goto nla_put_failure;
1143         }
1144         CMD(start_p2p_device, START_P2P_DEVICE);
1145         CMD(set_mcast_rate, SET_MCAST_RATE);
1146
1147 #ifdef CONFIG_NL80211_TESTMODE
1148         CMD(testmode_cmd, TESTMODE);
1149 #endif
1150
1151 #undef CMD
1152
1153         if (dev->ops->connect || dev->ops->auth) {
1154                 i++;
1155                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1156                         goto nla_put_failure;
1157         }
1158
1159         if (dev->ops->disconnect || dev->ops->deauth) {
1160                 i++;
1161                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1162                         goto nla_put_failure;
1163         }
1164
1165         nla_nest_end(msg, nl_cmds);
1166
1167         if (dev->ops->remain_on_channel &&
1168             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1169             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1170                         dev->wiphy.max_remain_on_channel_duration))
1171                 goto nla_put_failure;
1172
1173         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1174             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1175                 goto nla_put_failure;
1176
1177         if (mgmt_stypes) {
1178                 u16 stypes;
1179                 struct nlattr *nl_ftypes, *nl_ifs;
1180                 enum nl80211_iftype ift;
1181
1182                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1183                 if (!nl_ifs)
1184                         goto nla_put_failure;
1185
1186                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1187                         nl_ftypes = nla_nest_start(msg, ift);
1188                         if (!nl_ftypes)
1189                                 goto nla_put_failure;
1190                         i = 0;
1191                         stypes = mgmt_stypes[ift].tx;
1192                         while (stypes) {
1193                                 if ((stypes & 1) &&
1194                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1195                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1196                                         goto nla_put_failure;
1197                                 stypes >>= 1;
1198                                 i++;
1199                         }
1200                         nla_nest_end(msg, nl_ftypes);
1201                 }
1202
1203                 nla_nest_end(msg, nl_ifs);
1204
1205                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1206                 if (!nl_ifs)
1207                         goto nla_put_failure;
1208
1209                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1210                         nl_ftypes = nla_nest_start(msg, ift);
1211                         if (!nl_ftypes)
1212                                 goto nla_put_failure;
1213                         i = 0;
1214                         stypes = mgmt_stypes[ift].rx;
1215                         while (stypes) {
1216                                 if ((stypes & 1) &&
1217                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1218                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1219                                         goto nla_put_failure;
1220                                 stypes >>= 1;
1221                                 i++;
1222                         }
1223                         nla_nest_end(msg, nl_ftypes);
1224                 }
1225                 nla_nest_end(msg, nl_ifs);
1226         }
1227
1228 #ifdef CONFIG_PM
1229         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1230                 struct nlattr *nl_wowlan;
1231
1232                 nl_wowlan = nla_nest_start(msg,
1233                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1234                 if (!nl_wowlan)
1235                         goto nla_put_failure;
1236
1237                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1238                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1239                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1240                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1241                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1242                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1243                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1244                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1245                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1246                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1247                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1248                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1249                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1250                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1251                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1252                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1253                     goto nla_put_failure;
1254                 if (dev->wiphy.wowlan.n_patterns) {
1255                         struct nl80211_wowlan_pattern_support pat = {
1256                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1257                                 .min_pattern_len =
1258                                         dev->wiphy.wowlan.pattern_min_len,
1259                                 .max_pattern_len =
1260                                         dev->wiphy.wowlan.pattern_max_len,
1261                                 .max_pkt_offset =
1262                                         dev->wiphy.wowlan.max_pkt_offset,
1263                         };
1264                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1265                                     sizeof(pat), &pat))
1266                                 goto nla_put_failure;
1267                 }
1268
1269                 nla_nest_end(msg, nl_wowlan);
1270         }
1271 #endif
1272
1273         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1274                                 dev->wiphy.software_iftypes))
1275                 goto nla_put_failure;
1276
1277         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1278                 goto nla_put_failure;
1279
1280         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1281             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1282                         dev->wiphy.ap_sme_capa))
1283                 goto nla_put_failure;
1284
1285         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1286                         dev->wiphy.features))
1287                 goto nla_put_failure;
1288
1289         if (dev->wiphy.ht_capa_mod_mask &&
1290             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1291                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1292                     dev->wiphy.ht_capa_mod_mask))
1293                 goto nla_put_failure;
1294
1295         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1296             dev->wiphy.max_acl_mac_addrs &&
1297             nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1298                         dev->wiphy.max_acl_mac_addrs))
1299                 goto nla_put_failure;
1300
1301         return genlmsg_end(msg, hdr);
1302
1303  nla_put_failure:
1304         genlmsg_cancel(msg, hdr);
1305         return -EMSGSIZE;
1306 }
1307
1308 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1309 {
1310         int idx = 0, ret;
1311         int start = cb->args[0];
1312         struct cfg80211_registered_device *dev;
1313
1314         mutex_lock(&cfg80211_mutex);
1315         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1316                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1317                         continue;
1318                 if (++idx <= start)
1319                         continue;
1320                 ret = nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1321                                          cb->nlh->nlmsg_seq, NLM_F_MULTI,
1322                                          dev);
1323                 if (ret < 0) {
1324                         /*
1325                          * If sending the wiphy data didn't fit (ENOBUFS or
1326                          * EMSGSIZE returned), this SKB is still empty (so
1327                          * it's not too big because another wiphy dataset is
1328                          * already in the skb) and we've not tried to adjust
1329                          * the dump allocation yet ... then adjust the alloc
1330                          * size to be bigger, and return 1 but with the empty
1331                          * skb. This results in an empty message being RX'ed
1332                          * in userspace, but that is ignored.
1333                          *
1334                          * We can then retry with the larger buffer.
1335                          */
1336                         if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1337                             !skb->len &&
1338                             cb->min_dump_alloc < 4096) {
1339                                 cb->min_dump_alloc = 4096;
1340                                 mutex_unlock(&cfg80211_mutex);
1341                                 return 1;
1342                         }
1343                         idx--;
1344                         break;
1345                 }
1346         }
1347         mutex_unlock(&cfg80211_mutex);
1348
1349         cb->args[0] = idx;
1350
1351         return skb->len;
1352 }
1353
1354 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1355 {
1356         struct sk_buff *msg;
1357         struct cfg80211_registered_device *dev = info->user_ptr[0];
1358
1359         msg = nlmsg_new(4096, GFP_KERNEL);
1360         if (!msg)
1361                 return -ENOMEM;
1362
1363         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1364                 nlmsg_free(msg);
1365                 return -ENOBUFS;
1366         }
1367
1368         return genlmsg_reply(msg, info);
1369 }
1370
1371 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1372         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1373         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1374         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1375         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1376         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1377 };
1378
1379 static int parse_txq_params(struct nlattr *tb[],
1380                             struct ieee80211_txq_params *txq_params)
1381 {
1382         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1383             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1384             !tb[NL80211_TXQ_ATTR_AIFS])
1385                 return -EINVAL;
1386
1387         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1388         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1389         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1390         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1391         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1392
1393         if (txq_params->ac >= NL80211_NUM_ACS)
1394                 return -EINVAL;
1395
1396         return 0;
1397 }
1398
1399 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1400 {
1401         /*
1402          * You can only set the channel explicitly for WDS interfaces,
1403          * all others have their channel managed via their respective
1404          * "establish a connection" command (connect, join, ...)
1405          *
1406          * For AP/GO and mesh mode, the channel can be set with the
1407          * channel userspace API, but is only stored and passed to the
1408          * low-level driver when the AP starts or the mesh is joined.
1409          * This is for backward compatibility, userspace can also give
1410          * the channel in the start-ap or join-mesh commands instead.
1411          *
1412          * Monitors are special as they are normally slaved to
1413          * whatever else is going on, so they have their own special
1414          * operation to set the monitor channel if possible.
1415          */
1416         return !wdev ||
1417                 wdev->iftype == NL80211_IFTYPE_AP ||
1418                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1419                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1420                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1421 }
1422
1423 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1424                                  struct genl_info *info,
1425                                  struct cfg80211_chan_def *chandef)
1426 {
1427         u32 control_freq;
1428
1429         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1430                 return -EINVAL;
1431
1432         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1433
1434         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1435         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1436         chandef->center_freq1 = control_freq;
1437         chandef->center_freq2 = 0;
1438
1439         /* Primary channel not allowed */
1440         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1441                 return -EINVAL;
1442
1443         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1444                 enum nl80211_channel_type chantype;
1445
1446                 chantype = nla_get_u32(
1447                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1448
1449                 switch (chantype) {
1450                 case NL80211_CHAN_NO_HT:
1451                 case NL80211_CHAN_HT20:
1452                 case NL80211_CHAN_HT40PLUS:
1453                 case NL80211_CHAN_HT40MINUS:
1454                         cfg80211_chandef_create(chandef, chandef->chan,
1455                                                 chantype);
1456                         break;
1457                 default:
1458                         return -EINVAL;
1459                 }
1460         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1461                 chandef->width =
1462                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1463                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1464                         chandef->center_freq1 =
1465                                 nla_get_u32(
1466                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1467                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1468                         chandef->center_freq2 =
1469                                 nla_get_u32(
1470                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1471         }
1472
1473         if (!cfg80211_chandef_valid(chandef))
1474                 return -EINVAL;
1475
1476         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1477                                      IEEE80211_CHAN_DISABLED))
1478                 return -EINVAL;
1479
1480         return 0;
1481 }
1482
1483 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1484                                  struct wireless_dev *wdev,
1485                                  struct genl_info *info)
1486 {
1487         struct cfg80211_chan_def chandef;
1488         int result;
1489         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1490
1491         if (wdev)
1492                 iftype = wdev->iftype;
1493
1494         if (!nl80211_can_set_dev_channel(wdev))
1495                 return -EOPNOTSUPP;
1496
1497         result = nl80211_parse_chandef(rdev, info, &chandef);
1498         if (result)
1499                 return result;
1500
1501         mutex_lock(&rdev->devlist_mtx);
1502         switch (iftype) {
1503         case NL80211_IFTYPE_AP:
1504         case NL80211_IFTYPE_P2P_GO:
1505                 if (wdev->beacon_interval) {
1506                         result = -EBUSY;
1507                         break;
1508                 }
1509                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1510                         result = -EINVAL;
1511                         break;
1512                 }
1513                 wdev->preset_chandef = chandef;
1514                 result = 0;
1515                 break;
1516         case NL80211_IFTYPE_MESH_POINT:
1517                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1518                 break;
1519         case NL80211_IFTYPE_MONITOR:
1520                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1521                 break;
1522         default:
1523                 result = -EINVAL;
1524         }
1525         mutex_unlock(&rdev->devlist_mtx);
1526
1527         return result;
1528 }
1529
1530 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1531 {
1532         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1533         struct net_device *netdev = info->user_ptr[1];
1534
1535         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1536 }
1537
1538 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1539 {
1540         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1541         struct net_device *dev = info->user_ptr[1];
1542         struct wireless_dev *wdev = dev->ieee80211_ptr;
1543         const u8 *bssid;
1544
1545         if (!info->attrs[NL80211_ATTR_MAC])
1546                 return -EINVAL;
1547
1548         if (netif_running(dev))
1549                 return -EBUSY;
1550
1551         if (!rdev->ops->set_wds_peer)
1552                 return -EOPNOTSUPP;
1553
1554         if (wdev->iftype != NL80211_IFTYPE_WDS)
1555                 return -EOPNOTSUPP;
1556
1557         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1558         return rdev_set_wds_peer(rdev, dev, bssid);
1559 }
1560
1561
1562 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1563 {
1564         struct cfg80211_registered_device *rdev;
1565         struct net_device *netdev = NULL;
1566         struct wireless_dev *wdev;
1567         int result = 0, rem_txq_params = 0;
1568         struct nlattr *nl_txq_params;
1569         u32 changed;
1570         u8 retry_short = 0, retry_long = 0;
1571         u32 frag_threshold = 0, rts_threshold = 0;
1572         u8 coverage_class = 0;
1573
1574         /*
1575          * Try to find the wiphy and netdev. Normally this
1576          * function shouldn't need the netdev, but this is
1577          * done for backward compatibility -- previously
1578          * setting the channel was done per wiphy, but now
1579          * it is per netdev. Previous userland like hostapd
1580          * also passed a netdev to set_wiphy, so that it is
1581          * possible to let that go to the right netdev!
1582          */
1583         mutex_lock(&cfg80211_mutex);
1584
1585         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1586                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1587
1588                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1589                 if (netdev && netdev->ieee80211_ptr) {
1590                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1591                         mutex_lock(&rdev->mtx);
1592                 } else
1593                         netdev = NULL;
1594         }
1595
1596         if (!netdev) {
1597                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1598                                                   info->attrs);
1599                 if (IS_ERR(rdev)) {
1600                         mutex_unlock(&cfg80211_mutex);
1601                         return PTR_ERR(rdev);
1602                 }
1603                 wdev = NULL;
1604                 netdev = NULL;
1605                 result = 0;
1606
1607                 mutex_lock(&rdev->mtx);
1608         } else
1609                 wdev = netdev->ieee80211_ptr;
1610
1611         /*
1612          * end workaround code, by now the rdev is available
1613          * and locked, and wdev may or may not be NULL.
1614          */
1615
1616         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1617                 result = cfg80211_dev_rename(
1618                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1619
1620         mutex_unlock(&cfg80211_mutex);
1621
1622         if (result)
1623                 goto bad_res;
1624
1625         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1626                 struct ieee80211_txq_params txq_params;
1627                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1628
1629                 if (!rdev->ops->set_txq_params) {
1630                         result = -EOPNOTSUPP;
1631                         goto bad_res;
1632                 }
1633
1634                 if (!netdev) {
1635                         result = -EINVAL;
1636                         goto bad_res;
1637                 }
1638
1639                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1640                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1641                         result = -EINVAL;
1642                         goto bad_res;
1643                 }
1644
1645                 if (!netif_running(netdev)) {
1646                         result = -ENETDOWN;
1647                         goto bad_res;
1648                 }
1649
1650                 nla_for_each_nested(nl_txq_params,
1651                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1652                                     rem_txq_params) {
1653                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1654                                   nla_data(nl_txq_params),
1655                                   nla_len(nl_txq_params),
1656                                   txq_params_policy);
1657                         result = parse_txq_params(tb, &txq_params);
1658                         if (result)
1659                                 goto bad_res;
1660
1661                         result = rdev_set_txq_params(rdev, netdev,
1662                                                      &txq_params);
1663                         if (result)
1664                                 goto bad_res;
1665                 }
1666         }
1667
1668         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1669                 result = __nl80211_set_channel(rdev,
1670                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1671                                 info);
1672                 if (result)
1673                         goto bad_res;
1674         }
1675
1676         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1677                 struct wireless_dev *txp_wdev = wdev;
1678                 enum nl80211_tx_power_setting type;
1679                 int idx, mbm = 0;
1680
1681                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1682                         txp_wdev = NULL;
1683
1684                 if (!rdev->ops->set_tx_power) {
1685                         result = -EOPNOTSUPP;
1686                         goto bad_res;
1687                 }
1688
1689                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1690                 type = nla_get_u32(info->attrs[idx]);
1691
1692                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1693                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1694                         result = -EINVAL;
1695                         goto bad_res;
1696                 }
1697
1698                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1699                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1700                         mbm = nla_get_u32(info->attrs[idx]);
1701                 }
1702
1703                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1704                 if (result)
1705                         goto bad_res;
1706         }
1707
1708         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1709             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1710                 u32 tx_ant, rx_ant;
1711                 if ((!rdev->wiphy.available_antennas_tx &&
1712                      !rdev->wiphy.available_antennas_rx) ||
1713                     !rdev->ops->set_antenna) {
1714                         result = -EOPNOTSUPP;
1715                         goto bad_res;
1716                 }
1717
1718                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1719                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1720
1721                 /* reject antenna configurations which don't match the
1722                  * available antenna masks, except for the "all" mask */
1723                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1724                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1725                         result = -EINVAL;
1726                         goto bad_res;
1727                 }
1728
1729                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1730                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1731
1732                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1733                 if (result)
1734                         goto bad_res;
1735         }
1736
1737         changed = 0;
1738
1739         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1740                 retry_short = nla_get_u8(
1741                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1742                 if (retry_short == 0) {
1743                         result = -EINVAL;
1744                         goto bad_res;
1745                 }
1746                 changed |= WIPHY_PARAM_RETRY_SHORT;
1747         }
1748
1749         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1750                 retry_long = nla_get_u8(
1751                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1752                 if (retry_long == 0) {
1753                         result = -EINVAL;
1754                         goto bad_res;
1755                 }
1756                 changed |= WIPHY_PARAM_RETRY_LONG;
1757         }
1758
1759         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1760                 frag_threshold = nla_get_u32(
1761                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1762                 if (frag_threshold < 256) {
1763                         result = -EINVAL;
1764                         goto bad_res;
1765                 }
1766                 if (frag_threshold != (u32) -1) {
1767                         /*
1768                          * Fragments (apart from the last one) are required to
1769                          * have even length. Make the fragmentation code
1770                          * simpler by stripping LSB should someone try to use
1771                          * odd threshold value.
1772                          */
1773                         frag_threshold &= ~0x1;
1774                 }
1775                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1776         }
1777
1778         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1779                 rts_threshold = nla_get_u32(
1780                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1781                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1782         }
1783
1784         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1785                 coverage_class = nla_get_u8(
1786                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1787                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1788         }
1789
1790         if (changed) {
1791                 u8 old_retry_short, old_retry_long;
1792                 u32 old_frag_threshold, old_rts_threshold;
1793                 u8 old_coverage_class;
1794
1795                 if (!rdev->ops->set_wiphy_params) {
1796                         result = -EOPNOTSUPP;
1797                         goto bad_res;
1798                 }
1799
1800                 old_retry_short = rdev->wiphy.retry_short;
1801                 old_retry_long = rdev->wiphy.retry_long;
1802                 old_frag_threshold = rdev->wiphy.frag_threshold;
1803                 old_rts_threshold = rdev->wiphy.rts_threshold;
1804                 old_coverage_class = rdev->wiphy.coverage_class;
1805
1806                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1807                         rdev->wiphy.retry_short = retry_short;
1808                 if (changed & WIPHY_PARAM_RETRY_LONG)
1809                         rdev->wiphy.retry_long = retry_long;
1810                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1811                         rdev->wiphy.frag_threshold = frag_threshold;
1812                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1813                         rdev->wiphy.rts_threshold = rts_threshold;
1814                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1815                         rdev->wiphy.coverage_class = coverage_class;
1816
1817                 result = rdev_set_wiphy_params(rdev, changed);
1818                 if (result) {
1819                         rdev->wiphy.retry_short = old_retry_short;
1820                         rdev->wiphy.retry_long = old_retry_long;
1821                         rdev->wiphy.frag_threshold = old_frag_threshold;
1822                         rdev->wiphy.rts_threshold = old_rts_threshold;
1823                         rdev->wiphy.coverage_class = old_coverage_class;
1824                 }
1825         }
1826
1827  bad_res:
1828         mutex_unlock(&rdev->mtx);
1829         if (netdev)
1830                 dev_put(netdev);
1831         return result;
1832 }
1833
1834 static inline u64 wdev_id(struct wireless_dev *wdev)
1835 {
1836         return (u64)wdev->identifier |
1837                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1838 }
1839
1840 static int nl80211_send_chandef(struct sk_buff *msg,
1841                                  struct cfg80211_chan_def *chandef)
1842 {
1843         WARN_ON(!cfg80211_chandef_valid(chandef));
1844
1845         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1846                         chandef->chan->center_freq))
1847                 return -ENOBUFS;
1848         switch (chandef->width) {
1849         case NL80211_CHAN_WIDTH_20_NOHT:
1850         case NL80211_CHAN_WIDTH_20:
1851         case NL80211_CHAN_WIDTH_40:
1852                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1853                                 cfg80211_get_chandef_type(chandef)))
1854                         return -ENOBUFS;
1855                 break;
1856         default:
1857                 break;
1858         }
1859         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1860                 return -ENOBUFS;
1861         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1862                 return -ENOBUFS;
1863         if (chandef->center_freq2 &&
1864             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1865                 return -ENOBUFS;
1866         return 0;
1867 }
1868
1869 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1870                               struct cfg80211_registered_device *rdev,
1871                               struct wireless_dev *wdev)
1872 {
1873         struct net_device *dev = wdev->netdev;
1874         void *hdr;
1875
1876         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1877         if (!hdr)
1878                 return -1;
1879
1880         if (dev &&
1881             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1882              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1883                 goto nla_put_failure;
1884
1885         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1886             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1887             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1888             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1889             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1890                         rdev->devlist_generation ^
1891                         (cfg80211_rdev_list_generation << 2)))
1892                 goto nla_put_failure;
1893
1894         if (rdev->ops->get_channel) {
1895                 int ret;
1896                 struct cfg80211_chan_def chandef;
1897
1898                 ret = rdev_get_channel(rdev, wdev, &chandef);
1899                 if (ret == 0) {
1900                         if (nl80211_send_chandef(msg, &chandef))
1901                                 goto nla_put_failure;
1902                 }
1903         }
1904
1905         if (wdev->ssid_len) {
1906                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1907                         goto nla_put_failure;
1908         }
1909
1910         return genlmsg_end(msg, hdr);
1911
1912  nla_put_failure:
1913         genlmsg_cancel(msg, hdr);
1914         return -EMSGSIZE;
1915 }
1916
1917 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1918 {
1919         int wp_idx = 0;
1920         int if_idx = 0;
1921         int wp_start = cb->args[0];
1922         int if_start = cb->args[1];
1923         struct cfg80211_registered_device *rdev;
1924         struct wireless_dev *wdev;
1925
1926         mutex_lock(&cfg80211_mutex);
1927         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1928                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1929                         continue;
1930                 if (wp_idx < wp_start) {
1931                         wp_idx++;
1932                         continue;
1933                 }
1934                 if_idx = 0;
1935
1936                 mutex_lock(&rdev->devlist_mtx);
1937                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1938                         if (if_idx < if_start) {
1939                                 if_idx++;
1940                                 continue;
1941                         }
1942                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1943                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1944                                                rdev, wdev) < 0) {
1945                                 mutex_unlock(&rdev->devlist_mtx);
1946                                 goto out;
1947                         }
1948                         if_idx++;
1949                 }
1950                 mutex_unlock(&rdev->devlist_mtx);
1951
1952                 wp_idx++;
1953         }
1954  out:
1955         mutex_unlock(&cfg80211_mutex);
1956
1957         cb->args[0] = wp_idx;
1958         cb->args[1] = if_idx;
1959
1960         return skb->len;
1961 }
1962
1963 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1964 {
1965         struct sk_buff *msg;
1966         struct cfg80211_registered_device *dev = info->user_ptr[0];
1967         struct wireless_dev *wdev = info->user_ptr[1];
1968
1969         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1970         if (!msg)
1971                 return -ENOMEM;
1972
1973         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1974                                dev, wdev) < 0) {
1975                 nlmsg_free(msg);
1976                 return -ENOBUFS;
1977         }
1978
1979         return genlmsg_reply(msg, info);
1980 }
1981
1982 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1983         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1984         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1985         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1986         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1987         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1988 };
1989
1990 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1991 {
1992         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1993         int flag;
1994
1995         *mntrflags = 0;
1996
1997         if (!nla)
1998                 return -EINVAL;
1999
2000         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2001                              nla, mntr_flags_policy))
2002                 return -EINVAL;
2003
2004         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2005                 if (flags[flag])
2006                         *mntrflags |= (1<<flag);
2007
2008         return 0;
2009 }
2010
2011 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2012                                struct net_device *netdev, u8 use_4addr,
2013                                enum nl80211_iftype iftype)
2014 {
2015         if (!use_4addr) {
2016                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2017                         return -EBUSY;
2018                 return 0;
2019         }
2020
2021         switch (iftype) {
2022         case NL80211_IFTYPE_AP_VLAN:
2023                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2024                         return 0;
2025                 break;
2026         case NL80211_IFTYPE_STATION:
2027                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2028                         return 0;
2029                 break;
2030         default:
2031                 break;
2032         }
2033
2034         return -EOPNOTSUPP;
2035 }
2036
2037 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2038 {
2039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2040         struct vif_params params;
2041         int err;
2042         enum nl80211_iftype otype, ntype;
2043         struct net_device *dev = info->user_ptr[1];
2044         u32 _flags, *flags = NULL;
2045         bool change = false;
2046
2047         memset(&params, 0, sizeof(params));
2048
2049         otype = ntype = dev->ieee80211_ptr->iftype;
2050
2051         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2052                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2053                 if (otype != ntype)
2054                         change = true;
2055                 if (ntype > NL80211_IFTYPE_MAX)
2056                         return -EINVAL;
2057         }
2058
2059         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2060                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2061
2062                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2063                         return -EINVAL;
2064                 if (netif_running(dev))
2065                         return -EBUSY;
2066
2067                 wdev_lock(wdev);
2068                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2069                              IEEE80211_MAX_MESH_ID_LEN);
2070                 wdev->mesh_id_up_len =
2071                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2072                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2073                        wdev->mesh_id_up_len);
2074                 wdev_unlock(wdev);
2075         }
2076
2077         if (info->attrs[NL80211_ATTR_4ADDR]) {
2078                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2079                 change = true;
2080                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2081                 if (err)
2082                         return err;
2083         } else {
2084                 params.use_4addr = -1;
2085         }
2086
2087         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2088                 if (ntype != NL80211_IFTYPE_MONITOR)
2089                         return -EINVAL;
2090                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2091                                           &_flags);
2092                 if (err)
2093                         return err;
2094
2095                 flags = &_flags;
2096                 change = true;
2097         }
2098
2099         if (change)
2100                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2101         else
2102                 err = 0;
2103
2104         if (!err && params.use_4addr != -1)
2105                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2106
2107         return err;
2108 }
2109
2110 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2111 {
2112         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2113         struct vif_params params;
2114         struct wireless_dev *wdev;
2115         struct sk_buff *msg;
2116         int err;
2117         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2118         u32 flags;
2119
2120         memset(&params, 0, sizeof(params));
2121
2122         if (!info->attrs[NL80211_ATTR_IFNAME])
2123                 return -EINVAL;
2124
2125         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2126                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2127                 if (type > NL80211_IFTYPE_MAX)
2128                         return -EINVAL;
2129         }
2130
2131         if (!rdev->ops->add_virtual_intf ||
2132             !(rdev->wiphy.interface_modes & (1 << type)))
2133                 return -EOPNOTSUPP;
2134
2135         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2136                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2137                            ETH_ALEN);
2138                 if (!is_valid_ether_addr(params.macaddr))
2139                         return -EADDRNOTAVAIL;
2140         }
2141
2142         if (info->attrs[NL80211_ATTR_4ADDR]) {
2143                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2144                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2145                 if (err)
2146                         return err;
2147         }
2148
2149         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2150         if (!msg)
2151                 return -ENOMEM;
2152
2153         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2154                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2155                                   &flags);
2156         wdev = rdev_add_virtual_intf(rdev,
2157                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2158                                 type, err ? NULL : &flags, &params);
2159         if (IS_ERR(wdev)) {
2160                 nlmsg_free(msg);
2161                 return PTR_ERR(wdev);
2162         }
2163
2164         switch (type) {
2165         case NL80211_IFTYPE_MESH_POINT:
2166                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2167                         break;
2168                 wdev_lock(wdev);
2169                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2170                              IEEE80211_MAX_MESH_ID_LEN);
2171                 wdev->mesh_id_up_len =
2172                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2173                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2174                        wdev->mesh_id_up_len);
2175                 wdev_unlock(wdev);
2176                 break;
2177         case NL80211_IFTYPE_P2P_DEVICE:
2178                 /*
2179                  * P2P Device doesn't have a netdev, so doesn't go
2180                  * through the netdev notifier and must be added here
2181                  */
2182                 mutex_init(&wdev->mtx);
2183                 INIT_LIST_HEAD(&wdev->event_list);
2184                 spin_lock_init(&wdev->event_lock);
2185                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2186                 spin_lock_init(&wdev->mgmt_registrations_lock);
2187
2188                 mutex_lock(&rdev->devlist_mtx);
2189                 wdev->identifier = ++rdev->wdev_id;
2190                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2191                 rdev->devlist_generation++;
2192                 mutex_unlock(&rdev->devlist_mtx);
2193                 break;
2194         default:
2195                 break;
2196         }
2197
2198         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2199                                rdev, wdev) < 0) {
2200                 nlmsg_free(msg);
2201                 return -ENOBUFS;
2202         }
2203
2204         return genlmsg_reply(msg, info);
2205 }
2206
2207 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2208 {
2209         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2210         struct wireless_dev *wdev = info->user_ptr[1];
2211
2212         if (!rdev->ops->del_virtual_intf)
2213                 return -EOPNOTSUPP;
2214
2215         /*
2216          * If we remove a wireless device without a netdev then clear
2217          * user_ptr[1] so that nl80211_post_doit won't dereference it
2218          * to check if it needs to do dev_put(). Otherwise it crashes
2219          * since the wdev has been freed, unlike with a netdev where
2220          * we need the dev_put() for the netdev to really be freed.
2221          */
2222         if (!wdev->netdev)
2223                 info->user_ptr[1] = NULL;
2224
2225         return rdev_del_virtual_intf(rdev, wdev);
2226 }
2227
2228 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2229 {
2230         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2231         struct net_device *dev = info->user_ptr[1];
2232         u16 noack_map;
2233
2234         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2235                 return -EINVAL;
2236
2237         if (!rdev->ops->set_noack_map)
2238                 return -EOPNOTSUPP;
2239
2240         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2241
2242         return rdev_set_noack_map(rdev, dev, noack_map);
2243 }
2244
2245 struct get_key_cookie {
2246         struct sk_buff *msg;
2247         int error;
2248         int idx;
2249 };
2250
2251 static void get_key_callback(void *c, struct key_params *params)
2252 {
2253         struct nlattr *key;
2254         struct get_key_cookie *cookie = c;
2255
2256         if ((params->key &&
2257              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2258                      params->key_len, params->key)) ||
2259             (params->seq &&
2260              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2261                      params->seq_len, params->seq)) ||
2262             (params->cipher &&
2263              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2264                          params->cipher)))
2265                 goto nla_put_failure;
2266
2267         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2268         if (!key)
2269                 goto nla_put_failure;
2270
2271         if ((params->key &&
2272              nla_put(cookie->msg, NL80211_KEY_DATA,
2273                      params->key_len, params->key)) ||
2274             (params->seq &&
2275              nla_put(cookie->msg, NL80211_KEY_SEQ,
2276                      params->seq_len, params->seq)) ||
2277             (params->cipher &&
2278              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2279                          params->cipher)))
2280                 goto nla_put_failure;
2281
2282         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2283                 goto nla_put_failure;
2284
2285         nla_nest_end(cookie->msg, key);
2286
2287         return;
2288  nla_put_failure:
2289         cookie->error = 1;
2290 }
2291
2292 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2293 {
2294         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2295         int err;
2296         struct net_device *dev = info->user_ptr[1];
2297         u8 key_idx = 0;
2298         const u8 *mac_addr = NULL;
2299         bool pairwise;
2300         struct get_key_cookie cookie = {
2301                 .error = 0,
2302         };
2303         void *hdr;
2304         struct sk_buff *msg;
2305
2306         if (info->attrs[NL80211_ATTR_KEY_IDX])
2307                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2308
2309         if (key_idx > 5)
2310                 return -EINVAL;
2311
2312         if (info->attrs[NL80211_ATTR_MAC])
2313                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2314
2315         pairwise = !!mac_addr;
2316         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2317                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2318                 if (kt >= NUM_NL80211_KEYTYPES)
2319                         return -EINVAL;
2320                 if (kt != NL80211_KEYTYPE_GROUP &&
2321                     kt != NL80211_KEYTYPE_PAIRWISE)
2322                         return -EINVAL;
2323                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2324         }
2325
2326         if (!rdev->ops->get_key)
2327                 return -EOPNOTSUPP;
2328
2329         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2330         if (!msg)
2331                 return -ENOMEM;
2332
2333         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2334                              NL80211_CMD_NEW_KEY);
2335         if (IS_ERR(hdr))
2336                 return PTR_ERR(hdr);
2337
2338         cookie.msg = msg;
2339         cookie.idx = key_idx;
2340
2341         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2342             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2343                 goto nla_put_failure;
2344         if (mac_addr &&
2345             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2346                 goto nla_put_failure;
2347
2348         if (pairwise && mac_addr &&
2349             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2350                 return -ENOENT;
2351
2352         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2353                            get_key_callback);
2354
2355         if (err)
2356                 goto free_msg;
2357
2358         if (cookie.error)
2359                 goto nla_put_failure;
2360
2361         genlmsg_end(msg, hdr);
2362         return genlmsg_reply(msg, info);
2363
2364  nla_put_failure:
2365         err = -ENOBUFS;
2366  free_msg:
2367         nlmsg_free(msg);
2368         return err;
2369 }
2370
2371 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2372 {
2373         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2374         struct key_parse key;
2375         int err;
2376         struct net_device *dev = info->user_ptr[1];
2377
2378         err = nl80211_parse_key(info, &key);
2379         if (err)
2380                 return err;
2381
2382         if (key.idx < 0)
2383                 return -EINVAL;
2384
2385         /* only support setting default key */
2386         if (!key.def && !key.defmgmt)
2387                 return -EINVAL;
2388
2389         wdev_lock(dev->ieee80211_ptr);
2390
2391         if (key.def) {
2392                 if (!rdev->ops->set_default_key) {
2393                         err = -EOPNOTSUPP;
2394                         goto out;
2395                 }
2396
2397                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2398                 if (err)
2399                         goto out;
2400
2401                 err = rdev_set_default_key(rdev, dev, key.idx,
2402                                                  key.def_uni, key.def_multi);
2403
2404                 if (err)
2405                         goto out;
2406
2407 #ifdef CONFIG_CFG80211_WEXT
2408                 dev->ieee80211_ptr->wext.default_key = key.idx;
2409 #endif
2410         } else {
2411                 if (key.def_uni || !key.def_multi) {
2412                         err = -EINVAL;
2413                         goto out;
2414                 }
2415
2416                 if (!rdev->ops->set_default_mgmt_key) {
2417                         err = -EOPNOTSUPP;
2418                         goto out;
2419                 }
2420
2421                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2422                 if (err)
2423                         goto out;
2424
2425                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2426                 if (err)
2427                         goto out;
2428
2429 #ifdef CONFIG_CFG80211_WEXT
2430                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2431 #endif
2432         }
2433
2434  out:
2435         wdev_unlock(dev->ieee80211_ptr);
2436
2437         return err;
2438 }
2439
2440 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2441 {
2442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2443         int err;
2444         struct net_device *dev = info->user_ptr[1];
2445         struct key_parse key;
2446         const u8 *mac_addr = NULL;
2447
2448         err = nl80211_parse_key(info, &key);
2449         if (err)
2450                 return err;
2451
2452         if (!key.p.key)
2453                 return -EINVAL;
2454
2455         if (info->attrs[NL80211_ATTR_MAC])
2456                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2457
2458         if (key.type == -1) {
2459                 if (mac_addr)
2460                         key.type = NL80211_KEYTYPE_PAIRWISE;
2461                 else
2462                         key.type = NL80211_KEYTYPE_GROUP;
2463         }
2464
2465         /* for now */
2466         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2467             key.type != NL80211_KEYTYPE_GROUP)
2468                 return -EINVAL;
2469
2470         if (!rdev->ops->add_key)
2471                 return -EOPNOTSUPP;
2472
2473         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2474                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2475                                            mac_addr))
2476                 return -EINVAL;
2477
2478         wdev_lock(dev->ieee80211_ptr);
2479         err = nl80211_key_allowed(dev->ieee80211_ptr);
2480         if (!err)
2481                 err = rdev_add_key(rdev, dev, key.idx,
2482                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2483                                     mac_addr, &key.p);
2484         wdev_unlock(dev->ieee80211_ptr);
2485
2486         return err;
2487 }
2488
2489 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2490 {
2491         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2492         int err;
2493         struct net_device *dev = info->user_ptr[1];
2494         u8 *mac_addr = NULL;
2495         struct key_parse key;
2496
2497         err = nl80211_parse_key(info, &key);
2498         if (err)
2499                 return err;
2500
2501         if (info->attrs[NL80211_ATTR_MAC])
2502                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2503
2504         if (key.type == -1) {
2505                 if (mac_addr)
2506                         key.type = NL80211_KEYTYPE_PAIRWISE;
2507                 else
2508                         key.type = NL80211_KEYTYPE_GROUP;
2509         }
2510
2511         /* for now */
2512         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2513             key.type != NL80211_KEYTYPE_GROUP)
2514                 return -EINVAL;
2515
2516         if (!rdev->ops->del_key)
2517                 return -EOPNOTSUPP;
2518
2519         wdev_lock(dev->ieee80211_ptr);
2520         err = nl80211_key_allowed(dev->ieee80211_ptr);
2521
2522         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2523             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2524                 err = -ENOENT;
2525
2526         if (!err)
2527                 err = rdev_del_key(rdev, dev, key.idx,
2528                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2529                                    mac_addr);
2530
2531 #ifdef CONFIG_CFG80211_WEXT
2532         if (!err) {
2533                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2534                         dev->ieee80211_ptr->wext.default_key = -1;
2535                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2536                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2537         }
2538 #endif
2539         wdev_unlock(dev->ieee80211_ptr);
2540
2541         return err;
2542 }
2543
2544 /* This function returns an error or the number of nested attributes */
2545 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2546 {
2547         struct nlattr *attr;
2548         int n_entries = 0, tmp;
2549
2550         nla_for_each_nested(attr, nl_attr, tmp) {
2551                 if (nla_len(attr) != ETH_ALEN)
2552                         return -EINVAL;
2553
2554                 n_entries++;
2555         }
2556
2557         return n_entries;
2558 }
2559
2560 /*
2561  * This function parses ACL information and allocates memory for ACL data.
2562  * On successful return, the calling function is responsible to free the
2563  * ACL buffer returned by this function.
2564  */
2565 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2566                                                 struct genl_info *info)
2567 {
2568         enum nl80211_acl_policy acl_policy;
2569         struct nlattr *attr;
2570         struct cfg80211_acl_data *acl;
2571         int i = 0, n_entries, tmp;
2572
2573         if (!wiphy->max_acl_mac_addrs)
2574                 return ERR_PTR(-EOPNOTSUPP);
2575
2576         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2577                 return ERR_PTR(-EINVAL);
2578
2579         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2580         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2581             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2582                 return ERR_PTR(-EINVAL);
2583
2584         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2585                 return ERR_PTR(-EINVAL);
2586
2587         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2588         if (n_entries < 0)
2589                 return ERR_PTR(n_entries);
2590
2591         if (n_entries > wiphy->max_acl_mac_addrs)
2592                 return ERR_PTR(-ENOTSUPP);
2593
2594         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2595                       GFP_KERNEL);
2596         if (!acl)
2597                 return ERR_PTR(-ENOMEM);
2598
2599         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2600                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2601                 i++;
2602         }
2603
2604         acl->n_acl_entries = n_entries;
2605         acl->acl_policy = acl_policy;
2606
2607         return acl;
2608 }
2609
2610 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2611 {
2612         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2613         struct net_device *dev = info->user_ptr[1];
2614         struct cfg80211_acl_data *acl;
2615         int err;
2616
2617         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2618             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2619                 return -EOPNOTSUPP;
2620
2621         if (!dev->ieee80211_ptr->beacon_interval)
2622                 return -EINVAL;
2623
2624         acl = parse_acl_data(&rdev->wiphy, info);
2625         if (IS_ERR(acl))
2626                 return PTR_ERR(acl);
2627
2628         err = rdev_set_mac_acl(rdev, dev, acl);
2629
2630         kfree(acl);
2631
2632         return err;
2633 }
2634
2635 static int nl80211_parse_beacon(struct genl_info *info,
2636                                 struct cfg80211_beacon_data *bcn)
2637 {
2638         bool haveinfo = false;
2639
2640         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2641             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2642             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2643             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2644                 return -EINVAL;
2645
2646         memset(bcn, 0, sizeof(*bcn));
2647
2648         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2649                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2650                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2651                 if (!bcn->head_len)
2652                         return -EINVAL;
2653                 haveinfo = true;
2654         }
2655
2656         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2657                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2658                 bcn->tail_len =
2659                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2660                 haveinfo = true;
2661         }
2662
2663         if (!haveinfo)
2664                 return -EINVAL;
2665
2666         if (info->attrs[NL80211_ATTR_IE]) {
2667                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2668                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2669         }
2670
2671         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2672                 bcn->proberesp_ies =
2673                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2674                 bcn->proberesp_ies_len =
2675                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2676         }
2677
2678         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2679                 bcn->assocresp_ies =
2680                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2681                 bcn->assocresp_ies_len =
2682                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2683         }
2684
2685         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2686                 bcn->probe_resp =
2687                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2688                 bcn->probe_resp_len =
2689                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2690         }
2691
2692         return 0;
2693 }
2694
2695 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2696                                    struct cfg80211_ap_settings *params)
2697 {
2698         struct wireless_dev *wdev;
2699         bool ret = false;
2700
2701         mutex_lock(&rdev->devlist_mtx);
2702
2703         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2704                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2705                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2706                         continue;
2707
2708                 if (!wdev->preset_chandef.chan)
2709                         continue;
2710
2711                 params->chandef = wdev->preset_chandef;
2712                 ret = true;
2713                 break;
2714         }
2715
2716         mutex_unlock(&rdev->devlist_mtx);
2717
2718         return ret;
2719 }
2720
2721 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2722                                     enum nl80211_auth_type auth_type,
2723                                     enum nl80211_commands cmd)
2724 {
2725         if (auth_type > NL80211_AUTHTYPE_MAX)
2726                 return false;
2727
2728         switch (cmd) {
2729         case NL80211_CMD_AUTHENTICATE:
2730                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2731                     auth_type == NL80211_AUTHTYPE_SAE)
2732                         return false;
2733                 return true;
2734         case NL80211_CMD_CONNECT:
2735         case NL80211_CMD_START_AP:
2736                 /* SAE not supported yet */
2737                 if (auth_type == NL80211_AUTHTYPE_SAE)
2738                         return false;
2739                 return true;
2740         default:
2741                 return false;
2742         }
2743 }
2744
2745 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2746 {
2747         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2748         struct net_device *dev = info->user_ptr[1];
2749         struct wireless_dev *wdev = dev->ieee80211_ptr;
2750         struct cfg80211_ap_settings params;
2751         int err;
2752         u8 radar_detect_width = 0;
2753
2754         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2755             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2756                 return -EOPNOTSUPP;
2757
2758         if (!rdev->ops->start_ap)
2759                 return -EOPNOTSUPP;
2760
2761         if (wdev->beacon_interval)
2762                 return -EALREADY;
2763
2764         memset(&params, 0, sizeof(params));
2765
2766         /* these are required for START_AP */
2767         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2768             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2769             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2770                 return -EINVAL;
2771
2772         err = nl80211_parse_beacon(info, &params.beacon);
2773         if (err)
2774                 return err;
2775
2776         params.beacon_interval =
2777                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2778         params.dtim_period =
2779                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2780
2781         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2782         if (err)
2783                 return err;
2784
2785         /*
2786          * In theory, some of these attributes should be required here
2787          * but since they were not used when the command was originally
2788          * added, keep them optional for old user space programs to let
2789          * them continue to work with drivers that do not need the
2790          * additional information -- drivers must check!
2791          */
2792         if (info->attrs[NL80211_ATTR_SSID]) {
2793                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2794                 params.ssid_len =
2795                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2796                 if (params.ssid_len == 0 ||
2797                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2798                         return -EINVAL;
2799         }
2800
2801         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2802                 params.hidden_ssid = nla_get_u32(
2803                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2804                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2805                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2806                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2807                         return -EINVAL;
2808         }
2809
2810         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2811
2812         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2813                 params.auth_type = nla_get_u32(
2814                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2815                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2816                                              NL80211_CMD_START_AP))
2817                         return -EINVAL;
2818         } else
2819                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2820
2821         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2822                                       NL80211_MAX_NR_CIPHER_SUITES);
2823         if (err)
2824                 return err;
2825
2826         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2827                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2828                         return -EOPNOTSUPP;
2829                 params.inactivity_timeout = nla_get_u16(
2830                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2831         }
2832
2833         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
2834                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2835                         return -EINVAL;
2836                 params.p2p_ctwindow =
2837                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
2838                 if (params.p2p_ctwindow > 127)
2839                         return -EINVAL;
2840                 if (params.p2p_ctwindow != 0 &&
2841                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
2842                         return -EINVAL;
2843         }
2844
2845         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
2846                 u8 tmp;
2847
2848                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2849                         return -EINVAL;
2850                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
2851                 if (tmp > 1)
2852                         return -EINVAL;
2853                 params.p2p_opp_ps = tmp;
2854                 if (params.p2p_opp_ps != 0 &&
2855                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
2856                         return -EINVAL;
2857         }
2858
2859         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2860                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2861                 if (err)
2862                         return err;
2863         } else if (wdev->preset_chandef.chan) {
2864                 params.chandef = wdev->preset_chandef;
2865         } else if (!nl80211_get_ap_channel(rdev, &params))
2866                 return -EINVAL;
2867
2868         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2869                 return -EINVAL;
2870
2871         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
2872         if (err < 0)
2873                 return err;
2874         if (err) {
2875                 radar_detect_width = BIT(params.chandef.width);
2876                 params.radar_required = true;
2877         }
2878
2879         mutex_lock(&rdev->devlist_mtx);
2880         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
2881                                            params.chandef.chan,
2882                                            CHAN_MODE_SHARED,
2883                                            radar_detect_width);
2884         mutex_unlock(&rdev->devlist_mtx);
2885
2886         if (err)
2887                 return err;
2888
2889         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
2890                 params.acl = parse_acl_data(&rdev->wiphy, info);
2891                 if (IS_ERR(params.acl))
2892                         return PTR_ERR(params.acl);
2893         }
2894
2895         err = rdev_start_ap(rdev, dev, &params);
2896         if (!err) {
2897                 wdev->preset_chandef = params.chandef;
2898                 wdev->beacon_interval = params.beacon_interval;
2899                 wdev->channel = params.chandef.chan;
2900                 wdev->ssid_len = params.ssid_len;
2901                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2902         }
2903
2904         kfree(params.acl);
2905
2906         return err;
2907 }
2908
2909 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2910 {
2911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2912         struct net_device *dev = info->user_ptr[1];
2913         struct wireless_dev *wdev = dev->ieee80211_ptr;
2914         struct cfg80211_beacon_data params;
2915         int err;
2916
2917         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2918             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2919                 return -EOPNOTSUPP;
2920
2921         if (!rdev->ops->change_beacon)
2922                 return -EOPNOTSUPP;
2923
2924         if (!wdev->beacon_interval)
2925                 return -EINVAL;
2926
2927         err = nl80211_parse_beacon(info, &params);
2928         if (err)
2929                 return err;
2930
2931         return rdev_change_beacon(rdev, dev, &params);
2932 }
2933
2934 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2935 {
2936         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2937         struct net_device *dev = info->user_ptr[1];
2938
2939         return cfg80211_stop_ap(rdev, dev);
2940 }
2941
2942 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2943         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2944         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2945         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2946         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2947         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2948         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2949 };
2950
2951 static int parse_station_flags(struct genl_info *info,
2952                                enum nl80211_iftype iftype,
2953                                struct station_parameters *params)
2954 {
2955         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2956         struct nlattr *nla;
2957         int flag;
2958
2959         /*
2960          * Try parsing the new attribute first so userspace
2961          * can specify both for older kernels.
2962          */
2963         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2964         if (nla) {
2965                 struct nl80211_sta_flag_update *sta_flags;
2966
2967                 sta_flags = nla_data(nla);
2968                 params->sta_flags_mask = sta_flags->mask;
2969                 params->sta_flags_set = sta_flags->set;
2970                 if ((params->sta_flags_mask |
2971                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2972                         return -EINVAL;
2973                 return 0;
2974         }
2975
2976         /* if present, parse the old attribute */
2977
2978         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2979         if (!nla)
2980                 return 0;
2981
2982         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2983                              nla, sta_flags_policy))
2984                 return -EINVAL;
2985
2986         /*
2987          * Only allow certain flags for interface types so that
2988          * other attributes are silently ignored. Remember that
2989          * this is backward compatibility code with old userspace
2990          * and shouldn't be hit in other cases anyway.
2991          */
2992         switch (iftype) {
2993         case NL80211_IFTYPE_AP:
2994         case NL80211_IFTYPE_AP_VLAN:
2995         case NL80211_IFTYPE_P2P_GO:
2996                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2997                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2998                                          BIT(NL80211_STA_FLAG_WME) |
2999                                          BIT(NL80211_STA_FLAG_MFP);
3000                 break;
3001         case NL80211_IFTYPE_P2P_CLIENT:
3002         case NL80211_IFTYPE_STATION:
3003                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3004                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3005                 break;
3006         case NL80211_IFTYPE_MESH_POINT:
3007                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3008                                          BIT(NL80211_STA_FLAG_MFP) |
3009                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3010         default:
3011                 return -EINVAL;
3012         }
3013
3014         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3015                 if (flags[flag]) {
3016                         params->sta_flags_set |= (1<<flag);
3017
3018                         /* no longer support new API additions in old API */
3019                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3020                                 return -EINVAL;
3021                 }
3022         }
3023
3024         return 0;
3025 }
3026
3027 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3028                                  int attr)
3029 {
3030         struct nlattr *rate;
3031         u32 bitrate;
3032         u16 bitrate_compat;
3033
3034         rate = nla_nest_start(msg, attr);
3035         if (!rate)
3036                 return false;
3037
3038         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3039         bitrate = cfg80211_calculate_bitrate(info);
3040         /* report 16-bit bitrate only if we can */
3041         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3042         if (bitrate > 0 &&
3043             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3044                 return false;
3045         if (bitrate_compat > 0 &&
3046             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3047                 return false;
3048
3049         if (info->flags & RATE_INFO_FLAGS_MCS) {
3050                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3051                         return false;
3052                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3053                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3054                         return false;
3055                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3056                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3057                         return false;
3058         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3059                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3060                         return false;
3061                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3062                         return false;
3063                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3064                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3065                         return false;
3066                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3067                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3068                         return false;
3069                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3070                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3071                         return false;
3072                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3073                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3074                         return false;
3075                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3076                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3077                         return false;
3078         }
3079
3080         nla_nest_end(msg, rate);
3081         return true;
3082 }
3083
3084 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3085                                 int flags,
3086                                 struct cfg80211_registered_device *rdev,
3087                                 struct net_device *dev,
3088                                 const u8 *mac_addr, struct station_info *sinfo)
3089 {
3090         void *hdr;
3091         struct nlattr *sinfoattr, *bss_param;
3092
3093         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3094         if (!hdr)
3095                 return -1;
3096
3097         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3098             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3099             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3100                 goto nla_put_failure;
3101
3102         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3103         if (!sinfoattr)
3104                 goto nla_put_failure;
3105         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3106             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3107                         sinfo->connected_time))
3108                 goto nla_put_failure;
3109         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3110             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3111                         sinfo->inactive_time))
3112                 goto nla_put_failure;
3113         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3114                               STATION_INFO_RX_BYTES64)) &&
3115             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3116                         (u32)sinfo->rx_bytes))
3117                 goto nla_put_failure;
3118         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3119                               NL80211_STA_INFO_TX_BYTES64)) &&
3120             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3121                         (u32)sinfo->tx_bytes))
3122                 goto nla_put_failure;
3123         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3124             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3125                         sinfo->rx_bytes))
3126                 goto nla_put_failure;
3127         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3128             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3129                         sinfo->tx_bytes))
3130                 goto nla_put_failure;
3131         if ((sinfo->filled & STATION_INFO_LLID) &&
3132             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3133                 goto nla_put_failure;
3134         if ((sinfo->filled & STATION_INFO_PLID) &&
3135             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3136                 goto nla_put_failure;
3137         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3138             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3139                        sinfo->plink_state))
3140                 goto nla_put_failure;
3141         switch (rdev->wiphy.signal_type) {
3142         case CFG80211_SIGNAL_TYPE_MBM:
3143                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3144                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3145                                sinfo->signal))
3146                         goto nla_put_failure;
3147                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3148                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3149                                sinfo->signal_avg))
3150                         goto nla_put_failure;
3151                 break;
3152         default:
3153                 break;
3154         }
3155         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3156                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3157                                           NL80211_STA_INFO_TX_BITRATE))
3158                         goto nla_put_failure;
3159         }
3160         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3161                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3162                                           NL80211_STA_INFO_RX_BITRATE))
3163                         goto nla_put_failure;
3164         }
3165         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3166             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3167                         sinfo->rx_packets))
3168                 goto nla_put_failure;
3169         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3170             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3171                         sinfo->tx_packets))
3172                 goto nla_put_failure;
3173         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3174             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3175                         sinfo->tx_retries))
3176                 goto nla_put_failure;
3177         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3178             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3179                         sinfo->tx_failed))
3180                 goto nla_put_failure;
3181         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3182             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3183                         sinfo->beacon_loss_count))
3184                 goto nla_put_failure;
3185         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3186             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3187                         sinfo->local_pm))
3188                 goto nla_put_failure;
3189         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3190             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3191                         sinfo->peer_pm))
3192                 goto nla_put_failure;
3193         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3194             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3195                         sinfo->nonpeer_pm))
3196                 goto nla_put_failure;
3197         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3198                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3199                 if (!bss_param)
3200                         goto nla_put_failure;
3201
3202                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3203                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3204                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3205                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3206                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3207                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3208                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3209                                sinfo->bss_param.dtim_period) ||
3210                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3211                                 sinfo->bss_param.beacon_interval))
3212                         goto nla_put_failure;
3213
3214                 nla_nest_end(msg, bss_param);
3215         }
3216         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3217             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3218                     sizeof(struct nl80211_sta_flag_update),
3219                     &sinfo->sta_flags))
3220                 goto nla_put_failure;
3221         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3222                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3223                             sinfo->t_offset))
3224                 goto nla_put_failure;
3225         nla_nest_end(msg, sinfoattr);
3226
3227         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3228             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3229                     sinfo->assoc_req_ies))
3230                 goto nla_put_failure;
3231
3232         return genlmsg_end(msg, hdr);
3233
3234  nla_put_failure:
3235         genlmsg_cancel(msg, hdr);
3236         return -EMSGSIZE;
3237 }
3238
3239 static int nl80211_dump_station(struct sk_buff *skb,
3240                                 struct netlink_callback *cb)
3241 {
3242         struct station_info sinfo;
3243         struct cfg80211_registered_device *dev;
3244         struct net_device *netdev;
3245         u8 mac_addr[ETH_ALEN];
3246         int sta_idx = cb->args[1];
3247         int err;
3248
3249         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3250         if (err)
3251                 return err;
3252
3253         if (!dev->ops->dump_station) {
3254                 err = -EOPNOTSUPP;
3255                 goto out_err;
3256         }
3257
3258         while (1) {
3259                 memset(&sinfo, 0, sizeof(sinfo));
3260                 err = rdev_dump_station(dev, netdev, sta_idx,
3261                                         mac_addr, &sinfo);
3262                 if (err == -ENOENT)
3263                         break;
3264                 if (err)
3265                         goto out_err;
3266
3267                 if (nl80211_send_station(skb,
3268                                 NETLINK_CB(cb->skb).portid,
3269                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3270                                 dev, netdev, mac_addr,
3271                                 &sinfo) < 0)
3272                         goto out;
3273
3274                 sta_idx++;
3275         }
3276
3277
3278  out:
3279         cb->args[1] = sta_idx;
3280         err = skb->len;
3281  out_err:
3282         nl80211_finish_netdev_dump(dev);
3283
3284         return err;
3285 }
3286
3287 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3288 {
3289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3290         struct net_device *dev = info->user_ptr[1];
3291         struct station_info sinfo;
3292         struct sk_buff *msg;
3293         u8 *mac_addr = NULL;
3294         int err;
3295
3296         memset(&sinfo, 0, sizeof(sinfo));
3297
3298         if (!info->attrs[NL80211_ATTR_MAC])
3299                 return -EINVAL;
3300
3301         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3302
3303         if (!rdev->ops->get_station)
3304                 return -EOPNOTSUPP;
3305
3306         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3307         if (err)
3308                 return err;
3309
3310         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3311         if (!msg)
3312                 return -ENOMEM;
3313
3314         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3315                                  rdev, dev, mac_addr, &sinfo) < 0) {
3316                 nlmsg_free(msg);
3317                 return -ENOBUFS;
3318         }
3319
3320         return genlmsg_reply(msg, info);
3321 }
3322
3323 /*
3324  * Get vlan interface making sure it is running and on the right wiphy.
3325  */
3326 static struct net_device *get_vlan(struct genl_info *info,
3327                                    struct cfg80211_registered_device *rdev)
3328 {
3329         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3330         struct net_device *v;
3331         int ret;
3332
3333         if (!vlanattr)
3334                 return NULL;
3335
3336         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3337         if (!v)
3338                 return ERR_PTR(-ENODEV);
3339
3340         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3341                 ret = -EINVAL;
3342                 goto error;
3343         }
3344
3345         if (!netif_running(v)) {
3346                 ret = -ENETDOWN;
3347                 goto error;
3348         }
3349
3350         return v;
3351  error:
3352         dev_put(v);
3353         return ERR_PTR(ret);
3354 }
3355
3356 static struct nla_policy
3357 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3358         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3359         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3360 };
3361
3362 static int nl80211_parse_sta_wme(struct genl_info *info,
3363                                  struct station_parameters *params)
3364 {
3365         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3366         struct nlattr *nla;
3367         int err;
3368
3369         /* parse WME attributes if present */
3370         if (!info->attrs[NL80211_ATTR_STA_WME])
3371                 return 0;
3372
3373         nla = info->attrs[NL80211_ATTR_STA_WME];
3374         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3375                                nl80211_sta_wme_policy);
3376         if (err)
3377                 return err;
3378
3379         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3380                 params->uapsd_queues = nla_get_u8(
3381                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3382         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3383                 return -EINVAL;
3384
3385         if (tb[NL80211_STA_WME_MAX_SP])
3386                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3387
3388         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3389                 return -EINVAL;
3390
3391         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3392
3393         return 0;
3394 }
3395
3396 static int nl80211_set_station_tdls(struct genl_info *info,
3397                                     struct station_parameters *params)
3398 {
3399         /* Dummy STA entry gets updated once the peer capabilities are known */
3400         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3401                 params->ht_capa =
3402                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3403         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3404                 params->vht_capa =
3405                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3406
3407         return nl80211_parse_sta_wme(info, params);
3408 }
3409
3410 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3411 {
3412         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3413         int err;
3414         struct net_device *dev = info->user_ptr[1];
3415         struct station_parameters params;
3416         u8 *mac_addr = NULL;
3417
3418         memset(&params, 0, sizeof(params));
3419
3420         params.listen_interval = -1;
3421
3422         if (info->attrs[NL80211_ATTR_STA_AID])
3423                 return -EINVAL;
3424
3425         if (!info->attrs[NL80211_ATTR_MAC])
3426                 return -EINVAL;
3427
3428         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3429
3430         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3431                 params.supported_rates =
3432                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3433                 params.supported_rates_len =
3434                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3435         }
3436
3437         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3438                 params.capability =
3439                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3440                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3441         }
3442
3443         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3444                 params.ext_capab =
3445                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3446                 params.ext_capab_len =
3447                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3448         }
3449
3450         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3451                 return -EINVAL;
3452
3453         if (!rdev->ops->change_station)
3454                 return -EOPNOTSUPP;
3455
3456         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3457                 return -EINVAL;
3458
3459         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3460                 params.plink_action =
3461                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3462                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3463                         return -EINVAL;
3464         }
3465
3466         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3467                 params.plink_state =
3468                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3469                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3470                         return -EINVAL;
3471                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3472         }
3473
3474         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3475                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3476                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3477
3478                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3479                     pm > NL80211_MESH_POWER_MAX)
3480                         return -EINVAL;
3481
3482                 params.local_pm = pm;
3483         }
3484
3485         switch (dev->ieee80211_ptr->iftype) {
3486         case NL80211_IFTYPE_AP:
3487         case NL80211_IFTYPE_AP_VLAN:
3488         case NL80211_IFTYPE_P2P_GO:
3489                 /* disallow mesh-specific things */
3490                 if (params.plink_action)
3491                         return -EINVAL;
3492                 if (params.local_pm)
3493                         return -EINVAL;
3494                 if (params.sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3495                         return -EINVAL;
3496
3497                 /* TDLS can't be set, ... */
3498                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3499                         return -EINVAL;
3500                 /*
3501                  * ... but don't bother the driver with it. This works around
3502                  * a hostapd/wpa_supplicant issue -- it always includes the
3503                  * TLDS_PEER flag in the mask even for AP mode.
3504                  */
3505                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3506
3507                 /* accept only the listed bits */
3508                 if (params.sta_flags_mask &
3509                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3510                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3511                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3512                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3513                                   BIT(NL80211_STA_FLAG_WME) |
3514                                   BIT(NL80211_STA_FLAG_MFP)))
3515                         return -EINVAL;
3516
3517                 /* but authenticated/associated only if driver handles it */
3518                 if (!(rdev->wiphy.features &
3519                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3520                     params.sta_flags_mask &
3521                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3522                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3523                         return -EINVAL;
3524
3525                 /* reject other things that can't change */
3526                 if (params.supported_rates)
3527                         return -EINVAL;
3528                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3529                         return -EINVAL;
3530                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3531                         return -EINVAL;
3532                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3533                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3534                         return -EINVAL;
3535
3536                 /* must be last in here for error handling */
3537                 params.vlan = get_vlan(info, rdev);
3538                 if (IS_ERR(params.vlan))
3539                         return PTR_ERR(params.vlan);
3540                 break;
3541         case NL80211_IFTYPE_P2P_CLIENT:
3542         case NL80211_IFTYPE_STATION:
3543                 /*
3544                  * Don't allow userspace to change the TDLS_PEER flag,
3545                  * but silently ignore attempts to change it since we
3546                  * don't have state here to verify that it doesn't try
3547                  * to change the flag.
3548                  */
3549                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3550                 /* Include parameters for TDLS peer (driver will check) */
3551                 err = nl80211_set_station_tdls(info, &params);
3552                 if (err)
3553                         return err;
3554                 /* disallow things sta doesn't support */
3555                 if (params.plink_action)
3556                         return -EINVAL;
3557                 if (params.local_pm)
3558                         return -EINVAL;
3559                 if (params.sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3560                         return -EINVAL;
3561                 /* reject any changes other than AUTHORIZED or WME (for TDLS) */
3562                 if (params.sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3563                                               BIT(NL80211_STA_FLAG_WME)))
3564                         return -EINVAL;
3565                 break;
3566         case NL80211_IFTYPE_ADHOC:
3567                 /* disallow things sta doesn't support */
3568                 if (params.plink_action)
3569                         return -EINVAL;
3570                 if (params.local_pm)
3571                         return -EINVAL;
3572                 if (params.sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3573                         return -EINVAL;
3574                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3575                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3576                         return -EINVAL;
3577                 /* reject any changes other than AUTHORIZED */
3578                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3579                         return -EINVAL;
3580                 break;
3581         case NL80211_IFTYPE_MESH_POINT:
3582                 /* disallow things mesh doesn't support */
3583                 if (params.vlan)
3584                         return -EINVAL;
3585                 if (params.supported_rates)
3586                         return -EINVAL;
3587                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3588                         return -EINVAL;
3589                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3590                         return -EINVAL;
3591                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3592                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3593                         return -EINVAL;
3594                 /*
3595                  * No special handling for TDLS here -- the userspace
3596                  * mesh code doesn't have this bug.
3597                  */
3598                 if (params.sta_flags_mask &
3599                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3600                                   BIT(NL80211_STA_FLAG_MFP) |
3601                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3602                         return -EINVAL;
3603                 break;
3604         default:
3605                 return -EOPNOTSUPP;
3606         }
3607
3608         /* be aware of params.vlan when changing code here */
3609
3610         err = rdev_change_station(rdev, dev, mac_addr, &params);
3611
3612         if (params.vlan)
3613                 dev_put(params.vlan);
3614
3615         return err;
3616 }
3617
3618 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3619 {
3620         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3621         int err;
3622         struct net_device *dev = info->user_ptr[1];
3623         struct station_parameters params;
3624         u8 *mac_addr = NULL;
3625
3626         memset(&params, 0, sizeof(params));
3627
3628         if (!rdev->ops->add_station)
3629                 return -EOPNOTSUPP;
3630
3631         if (!info->attrs[NL80211_ATTR_MAC])
3632                 return -EINVAL;
3633
3634         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3635                 return -EINVAL;
3636
3637         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3638                 return -EINVAL;
3639
3640         if (!info->attrs[NL80211_ATTR_STA_AID])
3641                 return -EINVAL;
3642
3643         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3644         params.supported_rates =
3645                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3646         params.supported_rates_len =
3647                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3648         params.listen_interval =
3649                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3650
3651         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3652         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3653                 return -EINVAL;
3654
3655         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3656                 params.capability =
3657                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3658                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3659         }
3660
3661         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3662                 params.ext_capab =
3663                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3664                 params.ext_capab_len =
3665                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3666         }
3667
3668         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3669                 params.ht_capa =
3670                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3671
3672         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3673                 params.vht_capa =
3674                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3675
3676         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3677                 params.plink_action =
3678                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3679                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3680                         return -EINVAL;
3681         }
3682
3683         err = nl80211_parse_sta_wme(info, &params);
3684         if (err)
3685                 return err;
3686
3687         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3688                 return -EINVAL;
3689
3690         switch (dev->ieee80211_ptr->iftype) {
3691         case NL80211_IFTYPE_AP:
3692         case NL80211_IFTYPE_AP_VLAN:
3693         case NL80211_IFTYPE_P2P_GO:
3694                 /* ignore WME attributes if iface/sta is not capable */
3695                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
3696                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
3697                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
3698
3699                 /* TDLS peers cannot be added */
3700                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3701                         return -EINVAL;
3702                 /* but don't bother the driver with it */
3703                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3704
3705                 /* allow authenticated/associated only if driver handles it */
3706                 if (!(rdev->wiphy.features &
3707                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3708                     params.sta_flags_mask &
3709                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3710                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3711                         return -EINVAL;
3712
3713                 /* must be last in here for error handling */
3714                 params.vlan = get_vlan(info, rdev);
3715                 if (IS_ERR(params.vlan))
3716                         return PTR_ERR(params.vlan);
3717                 break;
3718         case NL80211_IFTYPE_MESH_POINT:
3719                 /* ignore uAPSD data */
3720                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
3721
3722                 /* associated is disallowed */
3723                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3724                         return -EINVAL;
3725                 /* TDLS peers cannot be added */
3726                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3727                         return -EINVAL;
3728                 break;
3729         case NL80211_IFTYPE_STATION:
3730                 /* ignore uAPSD data */
3731                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
3732
3733                 /* associated is disallowed */
3734                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3735                         return -EINVAL;
3736                 /* Only TDLS peers can be added */
3737                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3738                         return -EINVAL;
3739                 /* Can only add if TDLS ... */
3740                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3741                         return -EOPNOTSUPP;
3742                 /* ... with external setup is supported */
3743                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3744                         return -EOPNOTSUPP;
3745                 break;
3746         default:
3747                 return -EOPNOTSUPP;
3748         }
3749
3750         /* be aware of params.vlan when changing code here */
3751
3752         err = rdev_add_station(rdev, dev, mac_addr, &params);
3753
3754         if (params.vlan)
3755                 dev_put(params.vlan);
3756         return err;
3757 }
3758
3759 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3760 {
3761         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3762         struct net_device *dev = info->user_ptr[1];
3763         u8 *mac_addr = NULL;
3764
3765         if (info->attrs[NL80211_ATTR_MAC])
3766                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3767
3768         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3769             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3770             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3771             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3772                 return -EINVAL;
3773
3774         if (!rdev->ops->del_station)
3775                 return -EOPNOTSUPP;
3776
3777         return rdev_del_station(rdev, dev, mac_addr);
3778 }
3779
3780 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3781                                 int flags, struct net_device *dev,
3782                                 u8 *dst, u8 *next_hop,
3783                                 struct mpath_info *pinfo)
3784 {
3785         void *hdr;
3786         struct nlattr *pinfoattr;
3787
3788         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3789         if (!hdr)
3790                 return -1;
3791
3792         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3793             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3794             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3795             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3796                 goto nla_put_failure;
3797
3798         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3799         if (!pinfoattr)
3800                 goto nla_put_failure;
3801         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3802             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3803                         pinfo->frame_qlen))
3804                 goto nla_put_failure;
3805         if (((pinfo->filled & MPATH_INFO_SN) &&
3806              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3807             ((pinfo->filled & MPATH_INFO_METRIC) &&
3808              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3809                          pinfo->metric)) ||
3810             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3811              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3812                          pinfo->exptime)) ||
3813             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3814              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3815                         pinfo->flags)) ||
3816             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3817              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3818                          pinfo->discovery_timeout)) ||
3819             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3820              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3821                         pinfo->discovery_retries)))
3822                 goto nla_put_failure;
3823
3824         nla_nest_end(msg, pinfoattr);
3825
3826         return genlmsg_end(msg, hdr);
3827
3828  nla_put_failure:
3829         genlmsg_cancel(msg, hdr);
3830         return -EMSGSIZE;
3831 }
3832
3833 static int nl80211_dump_mpath(struct sk_buff *skb,
3834                               struct netlink_callback *cb)
3835 {
3836         struct mpath_info pinfo;
3837         struct cfg80211_registered_device *dev;
3838         struct net_device *netdev;
3839         u8 dst[ETH_ALEN];
3840         u8 next_hop[ETH_ALEN];
3841         int path_idx = cb->args[1];
3842         int err;
3843
3844         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3845         if (err)
3846                 return err;
3847
3848         if (!dev->ops->dump_mpath) {
3849                 err = -EOPNOTSUPP;
3850                 goto out_err;
3851         }
3852
3853         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3854                 err = -EOPNOTSUPP;
3855                 goto out_err;
3856         }
3857
3858         while (1) {
3859                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3860                                       &pinfo);
3861                 if (err == -ENOENT)
3862                         break;
3863                 if (err)
3864                         goto out_err;
3865
3866                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3867                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3868                                        netdev, dst, next_hop,
3869                                        &pinfo) < 0)
3870                         goto out;
3871
3872                 path_idx++;
3873         }
3874
3875
3876  out:
3877         cb->args[1] = path_idx;
3878         err = skb->len;
3879  out_err:
3880         nl80211_finish_netdev_dump(dev);
3881         return err;
3882 }
3883
3884 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3885 {
3886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3887         int err;
3888         struct net_device *dev = info->user_ptr[1];
3889         struct mpath_info pinfo;
3890         struct sk_buff *msg;
3891         u8 *dst = NULL;
3892         u8 next_hop[ETH_ALEN];
3893
3894         memset(&pinfo, 0, sizeof(pinfo));
3895
3896         if (!info->attrs[NL80211_ATTR_MAC])
3897                 return -EINVAL;
3898
3899         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3900
3901         if (!rdev->ops->get_mpath)
3902                 return -EOPNOTSUPP;
3903
3904         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3905                 return -EOPNOTSUPP;
3906
3907         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3908         if (err)
3909                 return err;
3910
3911         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3912         if (!msg)
3913                 return -ENOMEM;
3914
3915         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3916                                  dev, dst, next_hop, &pinfo) < 0) {
3917                 nlmsg_free(msg);
3918                 return -ENOBUFS;
3919         }
3920
3921         return genlmsg_reply(msg, info);
3922 }
3923
3924 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3925 {
3926         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3927         struct net_device *dev = info->user_ptr[1];
3928         u8 *dst = NULL;
3929         u8 *next_hop = NULL;
3930
3931         if (!info->attrs[NL80211_ATTR_MAC])
3932                 return -EINVAL;
3933
3934         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3935                 return -EINVAL;
3936
3937         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3938         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3939
3940         if (!rdev->ops->change_mpath)
3941                 return -EOPNOTSUPP;
3942
3943         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3944                 return -EOPNOTSUPP;
3945
3946         return rdev_change_mpath(rdev, dev, dst, next_hop);
3947 }
3948
3949 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3950 {
3951         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3952         struct net_device *dev = info->user_ptr[1];
3953         u8 *dst = NULL;
3954         u8 *next_hop = NULL;
3955
3956         if (!info->attrs[NL80211_ATTR_MAC])
3957                 return -EINVAL;
3958
3959         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3960                 return -EINVAL;
3961
3962         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3963         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3964
3965         if (!rdev->ops->add_mpath)
3966                 return -EOPNOTSUPP;
3967
3968         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3969                 return -EOPNOTSUPP;
3970
3971         return rdev_add_mpath(rdev, dev, dst, next_hop);
3972 }
3973
3974 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3975 {
3976         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3977         struct net_device *dev = info->user_ptr[1];
3978         u8 *dst = NULL;
3979
3980         if (info->attrs[NL80211_ATTR_MAC])
3981                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3982
3983         if (!rdev->ops->del_mpath)
3984                 return -EOPNOTSUPP;
3985
3986         return rdev_del_mpath(rdev, dev, dst);
3987 }
3988
3989 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3990 {
3991         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3992         struct net_device *dev = info->user_ptr[1];
3993         struct bss_parameters params;
3994
3995         memset(&params, 0, sizeof(params));
3996         /* default to not changing parameters */
3997         params.use_cts_prot = -1;
3998         params.use_short_preamble = -1;
3999         params.use_short_slot_time = -1;
4000         params.ap_isolate = -1;
4001         params.ht_opmode = -1;
4002         params.p2p_ctwindow = -1;
4003         params.p2p_opp_ps = -1;
4004
4005         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4006                 params.use_cts_prot =
4007                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4008         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4009                 params.use_short_preamble =
4010                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4011         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4012                 params.use_short_slot_time =
4013                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4014         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4015                 params.basic_rates =
4016                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4017                 params.basic_rates_len =
4018                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4019         }
4020         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4021                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4022         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4023                 params.ht_opmode =
4024                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4025
4026         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4027                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4028                         return -EINVAL;
4029                 params.p2p_ctwindow =
4030                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4031                 if (params.p2p_ctwindow < 0)
4032                         return -EINVAL;
4033                 if (params.p2p_ctwindow != 0 &&
4034                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4035                         return -EINVAL;
4036         }
4037
4038         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4039                 u8 tmp;
4040
4041                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4042                         return -EINVAL;
4043                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4044                 if (tmp > 1)
4045                         return -EINVAL;
4046                 params.p2p_opp_ps = tmp;
4047                 if (params.p2p_opp_ps &&
4048                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4049                         return -EINVAL;
4050         }
4051
4052         if (!rdev->ops->change_bss)
4053                 return -EOPNOTSUPP;
4054
4055         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4056             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4057                 return -EOPNOTSUPP;
4058
4059         return rdev_change_bss(rdev, dev, &params);
4060 }
4061
4062 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4063         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4064         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4065         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4066         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4067         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4068         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4069 };
4070
4071 static int parse_reg_rule(struct nlattr *tb[],
4072         struct ieee80211_reg_rule *reg_rule)
4073 {
4074         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4075         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4076
4077         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4078                 return -EINVAL;
4079         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4080                 return -EINVAL;
4081         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4082                 return -EINVAL;
4083         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4084                 return -EINVAL;
4085         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4086                 return -EINVAL;
4087
4088         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4089
4090         freq_range->start_freq_khz =
4091                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4092         freq_range->end_freq_khz =
4093                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4094         freq_range->max_bandwidth_khz =
4095                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4096
4097         power_rule->max_eirp =
4098                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4099
4100         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4101                 power_rule->max_antenna_gain =
4102                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4103
4104         return 0;
4105 }
4106
4107 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4108 {
4109         int r;
4110         char *data = NULL;
4111         enum nl80211_user_reg_hint_type user_reg_hint_type;
4112
4113         /*
4114          * You should only get this when cfg80211 hasn't yet initialized
4115          * completely when built-in to the kernel right between the time
4116          * window between nl80211_init() and regulatory_init(), if that is
4117          * even possible.
4118          */
4119         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4120                 return -EINPROGRESS;
4121
4122         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4123                 return -EINVAL;
4124
4125         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4126
4127         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4128                 user_reg_hint_type =
4129                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4130         else
4131                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4132
4133         switch (user_reg_hint_type) {
4134         case NL80211_USER_REG_HINT_USER:
4135         case NL80211_USER_REG_HINT_CELL_BASE:
4136                 break;
4137         default:
4138                 return -EINVAL;
4139         }
4140
4141         r = regulatory_hint_user(data, user_reg_hint_type);
4142
4143         return r;
4144 }
4145
4146 static int nl80211_get_mesh_config(struct sk_buff *skb,
4147                                    struct genl_info *info)
4148 {
4149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4150         struct net_device *dev = info->user_ptr[1];
4151         struct wireless_dev *wdev = dev->ieee80211_ptr;
4152         struct mesh_config cur_params;
4153         int err = 0;
4154         void *hdr;
4155         struct nlattr *pinfoattr;
4156         struct sk_buff *msg;
4157
4158         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4159                 return -EOPNOTSUPP;
4160
4161         if (!rdev->ops->get_mesh_config)
4162                 return -EOPNOTSUPP;
4163
4164         wdev_lock(wdev);
4165         /* If not connected, get default parameters */
4166         if (!wdev->mesh_id_len)
4167                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4168         else
4169                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4170         wdev_unlock(wdev);
4171
4172         if (err)
4173                 return err;
4174
4175         /* Draw up a netlink message to send back */
4176         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4177         if (!msg)
4178                 return -ENOMEM;
4179         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4180                              NL80211_CMD_GET_MESH_CONFIG);
4181         if (!hdr)
4182                 goto out;
4183         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4184         if (!pinfoattr)
4185                 goto nla_put_failure;
4186         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4187             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4188                         cur_params.dot11MeshRetryTimeout) ||
4189             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4190                         cur_params.dot11MeshConfirmTimeout) ||
4191             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4192                         cur_params.dot11MeshHoldingTimeout) ||
4193             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4194                         cur_params.dot11MeshMaxPeerLinks) ||
4195             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4196                        cur_params.dot11MeshMaxRetries) ||
4197             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4198                        cur_params.dot11MeshTTL) ||
4199             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4200                        cur_params.element_ttl) ||
4201             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4202                        cur_params.auto_open_plinks) ||
4203             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4204                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4205             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4206                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4207             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4208                         cur_params.path_refresh_time) ||
4209             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4210                         cur_params.min_discovery_timeout) ||
4211             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4212                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4213             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4214                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4215             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4216                         cur_params.dot11MeshHWMPperrMinInterval) ||
4217             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4218                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4219             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4220                        cur_params.dot11MeshHWMPRootMode) ||
4221             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4222                         cur_params.dot11MeshHWMPRannInterval) ||
4223             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4224                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4225             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4226                        cur_params.dot11MeshForwarding) ||
4227             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4228                         cur_params.rssi_threshold) ||
4229             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4230                         cur_params.ht_opmode) ||
4231             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4232                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4233             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4234                         cur_params.dot11MeshHWMProotInterval) ||
4235             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4236                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4237             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4238                         cur_params.power_mode) ||
4239             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4240                         cur_params.dot11MeshAwakeWindowDuration))
4241                 goto nla_put_failure;
4242         nla_nest_end(msg, pinfoattr);
4243         genlmsg_end(msg, hdr);
4244         return genlmsg_reply(msg, info);
4245
4246  nla_put_failure:
4247         genlmsg_cancel(msg, hdr);
4248  out:
4249         nlmsg_free(msg);
4250         return -ENOBUFS;
4251 }
4252
4253 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4254         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4255         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4256         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4257         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4258         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4259         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4260         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4261         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4262         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4263         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4264         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4265         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4266         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4267         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4268         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4269         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4270         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4271         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4272         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4273         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4274         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4275         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4276         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4277         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4278         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4279         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4280         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4281 };
4282
4283 static const struct nla_policy
4284         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4285         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4286         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4287         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4288         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4289         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4290                                     .len = IEEE80211_MAX_DATA_LEN },
4291         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4292 };
4293
4294 static int nl80211_parse_mesh_config(struct genl_info *info,
4295                                      struct mesh_config *cfg,
4296                                      u32 *mask_out)
4297 {
4298         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4299         u32 mask = 0;
4300
4301 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4302 do {                                                                        \
4303         if (tb[attr]) {                                                     \
4304                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4305                         return -EINVAL;                                     \
4306                 cfg->param = fn(tb[attr]);                                  \
4307                 mask |= (1 << (attr - 1));                                  \
4308         }                                                                   \
4309 } while (0)
4310
4311
4312         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4313                 return -EINVAL;
4314         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4315                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4316                              nl80211_meshconf_params_policy))
4317                 return -EINVAL;
4318
4319         /* This makes sure that there aren't more than 32 mesh config
4320          * parameters (otherwise our bitfield scheme would not work.) */
4321         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4322
4323         /* Fill in the params struct */
4324         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4325                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4326                                   nla_get_u16);
4327         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4328                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4329                                   nla_get_u16);
4330         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4331                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4332                                   nla_get_u16);
4333         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4334                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4335                                   nla_get_u16);
4336         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4337                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4338                                   nla_get_u8);
4339         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4340                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4341         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4342                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4343                                   nla_get_u8);
4344         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4345                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4346                                   nla_get_u8);
4347         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4348                                   1, 255, mask,
4349                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4350                                   nla_get_u32);
4351         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4352                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4353                                   nla_get_u8);
4354         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4355                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4356                                   nla_get_u32);
4357         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4358                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4359                                   nla_get_u16);
4360         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4361                                   1, 65535, mask,
4362                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4363                                   nla_get_u32);
4364         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4365                                   1, 65535, mask,
4366                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4367                                   nla_get_u16);
4368         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4369                                   1, 65535, mask,
4370                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4371                                   nla_get_u16);
4372         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4373                                   dot11MeshHWMPnetDiameterTraversalTime,
4374                                   1, 65535, mask,
4375                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4376                                   nla_get_u16);
4377         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4378                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4379                                   nla_get_u8);
4380         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4381                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4382                                   nla_get_u16);
4383         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4384                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4385                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4386                                   nla_get_u8);
4387         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4388                                   mask, NL80211_MESHCONF_FORWARDING,
4389                                   nla_get_u8);
4390         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4391                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4392                                   nla_get_u32);
4393         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4394                                   mask, NL80211_MESHCONF_HT_OPMODE,
4395                                   nla_get_u16);
4396         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4397                                   1, 65535, mask,
4398                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4399                                   nla_get_u32);
4400         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4401                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4402                                   nla_get_u16);
4403         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4404                                   dot11MeshHWMPconfirmationInterval,
4405                                   1, 65535, mask,
4406                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4407                                   nla_get_u16);
4408         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4409                                   NL80211_MESH_POWER_ACTIVE,
4410                                   NL80211_MESH_POWER_MAX,
4411                                   mask, NL80211_MESHCONF_POWER_MODE,
4412                                   nla_get_u32);
4413         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4414                                   0, 65535, mask,
4415                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4416         if (mask_out)
4417                 *mask_out = mask;
4418
4419         return 0;
4420
4421 #undef FILL_IN_MESH_PARAM_IF_SET
4422 }
4423
4424 static int nl80211_parse_mesh_setup(struct genl_info *info,
4425                                      struct mesh_setup *setup)
4426 {
4427         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4428
4429         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4430                 return -EINVAL;
4431         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4432                              info->attrs[NL80211_ATTR_MESH_SETUP],
4433                              nl80211_mesh_setup_params_policy))
4434                 return -EINVAL;
4435
4436         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4437                 setup->sync_method =
4438                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4439                  IEEE80211_SYNC_METHOD_VENDOR :
4440                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4441
4442         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4443                 setup->path_sel_proto =
4444                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4445                  IEEE80211_PATH_PROTOCOL_VENDOR :
4446                  IEEE80211_PATH_PROTOCOL_HWMP;
4447
4448         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4449                 setup->path_metric =
4450                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4451                  IEEE80211_PATH_METRIC_VENDOR :
4452                  IEEE80211_PATH_METRIC_AIRTIME;
4453
4454
4455         if (tb[NL80211_MESH_SETUP_IE]) {
4456                 struct nlattr *ieattr =
4457                         tb[NL80211_MESH_SETUP_IE];
4458                 if (!is_valid_ie_attr(ieattr))
4459                         return -EINVAL;
4460                 setup->ie = nla_data(ieattr);
4461                 setup->ie_len = nla_len(ieattr);
4462         }
4463         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4464         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4465
4466         return 0;
4467 }
4468
4469 static int nl80211_update_mesh_config(struct sk_buff *skb,
4470                                       struct genl_info *info)
4471 {
4472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4473         struct net_device *dev = info->user_ptr[1];
4474         struct wireless_dev *wdev = dev->ieee80211_ptr;
4475         struct mesh_config cfg;
4476         u32 mask;
4477         int err;
4478
4479         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4480                 return -EOPNOTSUPP;
4481
4482         if (!rdev->ops->update_mesh_config)
4483                 return -EOPNOTSUPP;
4484
4485         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4486         if (err)
4487                 return err;
4488
4489         wdev_lock(wdev);
4490         if (!wdev->mesh_id_len)
4491                 err = -ENOLINK;
4492
4493         if (!err)
4494                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4495
4496         wdev_unlock(wdev);
4497
4498         return err;
4499 }
4500
4501 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4502 {
4503         const struct ieee80211_regdomain *regdom;
4504         struct sk_buff *msg;
4505         void *hdr = NULL;
4506         struct nlattr *nl_reg_rules;
4507         unsigned int i;
4508         int err = -EINVAL;
4509
4510         mutex_lock(&cfg80211_mutex);
4511
4512         if (!cfg80211_regdomain)
4513                 goto out;
4514
4515         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4516         if (!msg) {
4517                 err = -ENOBUFS;
4518                 goto out;
4519         }
4520
4521         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4522                              NL80211_CMD_GET_REG);
4523         if (!hdr)
4524                 goto put_failure;
4525
4526         if (reg_last_request_cell_base() &&
4527             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4528                         NL80211_USER_REG_HINT_CELL_BASE))
4529                 goto nla_put_failure;
4530
4531         rcu_read_lock();
4532         regdom = rcu_dereference(cfg80211_regdomain);
4533
4534         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4535             (regdom->dfs_region &&
4536              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4537                 goto nla_put_failure_rcu;
4538
4539         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4540         if (!nl_reg_rules)
4541                 goto nla_put_failure_rcu;
4542
4543         for (i = 0; i < regdom->n_reg_rules; i++) {
4544                 struct nlattr *nl_reg_rule;
4545                 const struct ieee80211_reg_rule *reg_rule;
4546                 const struct ieee80211_freq_range *freq_range;
4547                 const struct ieee80211_power_rule *power_rule;
4548
4549                 reg_rule = &regdom->reg_rules[i];
4550                 freq_range = &reg_rule->freq_range;
4551                 power_rule = &reg_rule->power_rule;
4552
4553                 nl_reg_rule = nla_nest_start(msg, i);
4554                 if (!nl_reg_rule)
4555                         goto nla_put_failure_rcu;
4556
4557                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4558                                 reg_rule->flags) ||
4559                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4560                                 freq_range->start_freq_khz) ||
4561                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4562                                 freq_range->end_freq_khz) ||
4563                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4564                                 freq_range->max_bandwidth_khz) ||
4565                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4566                                 power_rule->max_antenna_gain) ||
4567                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4568                                 power_rule->max_eirp))
4569                         goto nla_put_failure_rcu;
4570
4571                 nla_nest_end(msg, nl_reg_rule);
4572         }
4573         rcu_read_unlock();
4574
4575         nla_nest_end(msg, nl_reg_rules);
4576
4577         genlmsg_end(msg, hdr);
4578         err = genlmsg_reply(msg, info);
4579         goto out;
4580
4581 nla_put_failure_rcu:
4582         rcu_read_unlock();
4583 nla_put_failure:
4584         genlmsg_cancel(msg, hdr);
4585 put_failure:
4586         nlmsg_free(msg);
4587         err = -EMSGSIZE;
4588 out:
4589         mutex_unlock(&cfg80211_mutex);
4590         return err;
4591 }
4592
4593 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4594 {
4595         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4596         struct nlattr *nl_reg_rule;
4597         char *alpha2 = NULL;
4598         int rem_reg_rules = 0, r = 0;
4599         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4600         u8 dfs_region = 0;
4601         struct ieee80211_regdomain *rd = NULL;
4602
4603         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4604                 return -EINVAL;
4605
4606         if (!info->attrs[NL80211_ATTR_REG_RULES])
4607                 return -EINVAL;
4608
4609         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4610
4611         if (info->attrs[NL80211_ATTR_DFS_REGION])
4612                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4613
4614         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4615                             rem_reg_rules) {
4616                 num_rules++;
4617                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4618                         return -EINVAL;
4619         }
4620
4621         size_of_regd = sizeof(struct ieee80211_regdomain) +
4622                        num_rules * sizeof(struct ieee80211_reg_rule);
4623
4624         rd = kzalloc(size_of_regd, GFP_KERNEL);
4625         if (!rd)
4626                 return -ENOMEM;
4627
4628         rd->n_reg_rules = num_rules;
4629         rd->alpha2[0] = alpha2[0];
4630         rd->alpha2[1] = alpha2[1];
4631
4632         /*
4633          * Disable DFS master mode if the DFS region was
4634          * not supported or known on this kernel.
4635          */
4636         if (reg_supported_dfs_region(dfs_region))
4637                 rd->dfs_region = dfs_region;
4638
4639         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4640                             rem_reg_rules) {
4641                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4642                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4643                           reg_rule_policy);
4644                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4645                 if (r)
4646                         goto bad_reg;
4647
4648                 rule_idx++;
4649
4650                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4651                         r = -EINVAL;
4652                         goto bad_reg;
4653                 }
4654         }
4655
4656         mutex_lock(&cfg80211_mutex);
4657
4658         r = set_regdom(rd);
4659         /* set_regdom took ownership */
4660         rd = NULL;
4661         mutex_unlock(&cfg80211_mutex);
4662
4663  bad_reg:
4664         kfree(rd);
4665         return r;
4666 }
4667
4668 static int validate_scan_freqs(struct nlattr *freqs)
4669 {
4670         struct nlattr *attr1, *attr2;
4671         int n_channels = 0, tmp1, tmp2;
4672
4673         nla_for_each_nested(attr1, freqs, tmp1) {
4674                 n_channels++;
4675                 /*
4676                  * Some hardware has a limited channel list for
4677                  * scanning, and it is pretty much nonsensical
4678                  * to scan for a channel twice, so disallow that
4679                  * and don't require drivers to check that the
4680                  * channel list they get isn't longer than what
4681                  * they can scan, as long as they can scan all
4682                  * the channels they registered at once.
4683                  */
4684                 nla_for_each_nested(attr2, freqs, tmp2)
4685                         if (attr1 != attr2 &&
4686                             nla_get_u32(attr1) == nla_get_u32(attr2))
4687                                 return 0;
4688         }
4689
4690         return n_channels;
4691 }
4692
4693 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4694 {
4695         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4696         struct wireless_dev *wdev = info->user_ptr[1];
4697         struct cfg80211_scan_request *request;
4698         struct nlattr *attr;
4699         struct wiphy *wiphy;
4700         int err, tmp, n_ssids = 0, n_channels, i;
4701         size_t ie_len;
4702
4703         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4704                 return -EINVAL;
4705
4706         wiphy = &rdev->wiphy;
4707
4708         if (!rdev->ops->scan)
4709                 return -EOPNOTSUPP;
4710
4711         if (rdev->scan_req)
4712                 return -EBUSY;
4713
4714         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4715                 n_channels = validate_scan_freqs(
4716                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4717                 if (!n_channels)
4718                         return -EINVAL;
4719         } else {
4720                 enum ieee80211_band band;
4721                 n_channels = 0;
4722
4723                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4724                         if (wiphy->bands[band])
4725                                 n_channels += wiphy->bands[band]->n_channels;
4726         }
4727
4728         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4729                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4730                         n_ssids++;
4731
4732         if (n_ssids > wiphy->max_scan_ssids)
4733                 return -EINVAL;
4734
4735         if (info->attrs[NL80211_ATTR_IE])
4736                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4737         else
4738                 ie_len = 0;
4739
4740         if (ie_len > wiphy->max_scan_ie_len)
4741                 return -EINVAL;
4742
4743         request = kzalloc(sizeof(*request)
4744                         + sizeof(*request->ssids) * n_ssids
4745                         + sizeof(*request->channels) * n_channels
4746                         + ie_len, GFP_KERNEL);
4747         if (!request)
4748                 return -ENOMEM;
4749
4750         if (n_ssids)
4751                 request->ssids = (void *)&request->channels[n_channels];
4752         request->n_ssids = n_ssids;
4753         if (ie_len) {
4754                 if (request->ssids)
4755                         request->ie = (void *)(request->ssids + n_ssids);
4756                 else
4757                         request->ie = (void *)(request->channels + n_channels);
4758         }
4759
4760         i = 0;
4761         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4762                 /* user specified, bail out if channel not found */
4763                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4764                         struct ieee80211_channel *chan;
4765
4766                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4767
4768                         if (!chan) {
4769                                 err = -EINVAL;
4770                                 goto out_free;
4771                         }
4772
4773                         /* ignore disabled channels */
4774                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4775                                 continue;
4776
4777                         request->channels[i] = chan;
4778                         i++;
4779                 }
4780         } else {
4781                 enum ieee80211_band band;
4782
4783                 /* all channels */
4784                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4785                         int j;
4786                         if (!wiphy->bands[band])
4787                                 continue;
4788                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4789                                 struct ieee80211_channel *chan;
4790
4791                                 chan = &wiphy->bands[band]->channels[j];
4792
4793                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4794                                         continue;
4795
4796                                 request->channels[i] = chan;
4797                                 i++;
4798                         }
4799                 }
4800         }
4801
4802         if (!i) {
4803                 err = -EINVAL;
4804                 goto out_free;
4805         }
4806
4807         request->n_channels = i;
4808
4809         i = 0;
4810         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4811                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4812                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4813                                 err = -EINVAL;
4814                                 goto out_free;
4815                         }
4816                         request->ssids[i].ssid_len = nla_len(attr);
4817                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4818                         i++;
4819                 }
4820         }
4821
4822         if (info->attrs[NL80211_ATTR_IE]) {
4823                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4824                 memcpy((void *)request->ie,
4825                        nla_data(info->attrs[NL80211_ATTR_IE]),
4826                        request->ie_len);
4827         }
4828
4829         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4830                 if (wiphy->bands[i])
4831                         request->rates[i] =
4832                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4833
4834         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4835                 nla_for_each_nested(attr,
4836                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4837                                     tmp) {
4838                         enum ieee80211_band band = nla_type(attr);
4839
4840                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4841                                 err = -EINVAL;
4842                                 goto out_free;
4843                         }
4844                         err = ieee80211_get_ratemask(wiphy->bands[band],
4845                                                      nla_data(attr),
4846                                                      nla_len(attr),
4847                                                      &request->rates[band]);
4848                         if (err)
4849                                 goto out_free;
4850                 }
4851         }
4852
4853         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4854                 request->flags = nla_get_u32(
4855                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4856                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4857                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4858                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4859                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4860                         err = -EOPNOTSUPP;
4861                         goto out_free;
4862                 }
4863         }
4864
4865         request->no_cck =
4866                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4867
4868         request->wdev = wdev;
4869         request->wiphy = &rdev->wiphy;
4870         request->scan_start = jiffies;
4871
4872         rdev->scan_req = request;
4873         err = rdev_scan(rdev, request);
4874
4875         if (!err) {
4876                 nl80211_send_scan_start(rdev, wdev);
4877                 if (wdev->netdev)
4878                         dev_hold(wdev->netdev);
4879         } else {
4880  out_free:
4881                 rdev->scan_req = NULL;
4882                 kfree(request);
4883         }
4884
4885         return err;
4886 }
4887
4888 static int nl80211_start_sched_scan(struct sk_buff *skb,
4889                                     struct genl_info *info)
4890 {
4891         struct cfg80211_sched_scan_request *request;
4892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4893         struct net_device *dev = info->user_ptr[1];
4894         struct nlattr *attr;
4895         struct wiphy *wiphy;
4896         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4897         u32 interval;
4898         enum ieee80211_band band;
4899         size_t ie_len;
4900         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4901
4902         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4903             !rdev->ops->sched_scan_start)
4904                 return -EOPNOTSUPP;
4905
4906         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4907                 return -EINVAL;
4908
4909         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4910                 return -EINVAL;
4911
4912         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4913         if (interval == 0)
4914                 return -EINVAL;
4915
4916         wiphy = &rdev->wiphy;
4917
4918         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4919                 n_channels = validate_scan_freqs(
4920                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4921                 if (!n_channels)
4922                         return -EINVAL;
4923         } else {
4924                 n_channels = 0;
4925
4926                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4927                         if (wiphy->bands[band])
4928                                 n_channels += wiphy->bands[band]->n_channels;
4929         }
4930
4931         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4932                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4933                                     tmp)
4934                         n_ssids++;
4935
4936         if (n_ssids > wiphy->max_sched_scan_ssids)
4937                 return -EINVAL;
4938
4939         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4940                 nla_for_each_nested(attr,
4941                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4942                                     tmp)
4943                         n_match_sets++;
4944
4945         if (n_match_sets > wiphy->max_match_sets)
4946                 return -EINVAL;
4947
4948         if (info->attrs[NL80211_ATTR_IE])
4949                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4950         else
4951                 ie_len = 0;
4952
4953         if (ie_len > wiphy->max_sched_scan_ie_len)
4954                 return -EINVAL;
4955
4956         mutex_lock(&rdev->sched_scan_mtx);
4957
4958         if (rdev->sched_scan_req) {
4959                 err = -EINPROGRESS;
4960                 goto out;
4961         }
4962
4963         request = kzalloc(sizeof(*request)
4964                         + sizeof(*request->ssids) * n_ssids
4965                         + sizeof(*request->match_sets) * n_match_sets
4966                         + sizeof(*request->channels) * n_channels
4967                         + ie_len, GFP_KERNEL);
4968         if (!request) {
4969                 err = -ENOMEM;
4970                 goto out;
4971         }
4972
4973         if (n_ssids)
4974                 request->ssids = (void *)&request->channels[n_channels];
4975         request->n_ssids = n_ssids;
4976         if (ie_len) {
4977                 if (request->ssids)
4978                         request->ie = (void *)(request->ssids + n_ssids);
4979                 else
4980                         request->ie = (void *)(request->channels + n_channels);
4981         }
4982
4983         if (n_match_sets) {
4984                 if (request->ie)
4985                         request->match_sets = (void *)(request->ie + ie_len);
4986                 else if (request->ssids)
4987                         request->match_sets =
4988                                 (void *)(request->ssids + n_ssids);
4989                 else
4990                         request->match_sets =
4991                                 (void *)(request->channels + n_channels);
4992         }
4993         request->n_match_sets = n_match_sets;
4994
4995         i = 0;
4996         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4997                 /* user specified, bail out if channel not found */
4998                 nla_for_each_nested(attr,
4999                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5000                                     tmp) {
5001                         struct ieee80211_channel *chan;
5002
5003                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5004
5005                         if (!chan) {
5006                                 err = -EINVAL;
5007                                 goto out_free;
5008                         }
5009
5010                         /* ignore disabled channels */
5011                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5012                                 continue;
5013
5014                         request->channels[i] = chan;
5015                         i++;
5016                 }
5017         } else {
5018                 /* all channels */
5019                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5020                         int j;
5021                         if (!wiphy->bands[band])
5022                                 continue;
5023                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5024                                 struct ieee80211_channel *chan;
5025
5026                                 chan = &wiphy->bands[band]->channels[j];
5027
5028                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5029                                         continue;
5030
5031                                 request->channels[i] = chan;
5032                                 i++;
5033                         }
5034                 }
5035         }
5036
5037         if (!i) {
5038                 err = -EINVAL;
5039                 goto out_free;
5040         }
5041
5042         request->n_channels = i;
5043
5044         i = 0;
5045         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5046                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5047                                     tmp) {
5048                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5049                                 err = -EINVAL;
5050                                 goto out_free;
5051                         }
5052                         request->ssids[i].ssid_len = nla_len(attr);
5053                         memcpy(request->ssids[i].ssid, nla_data(attr),
5054                                nla_len(attr));
5055                         i++;
5056                 }
5057         }
5058
5059         i = 0;
5060         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5061                 nla_for_each_nested(attr,
5062                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5063                                     tmp) {
5064                         struct nlattr *ssid, *rssi;
5065
5066                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5067                                   nla_data(attr), nla_len(attr),
5068                                   nl80211_match_policy);
5069                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5070                         if (ssid) {
5071                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5072                                         err = -EINVAL;
5073                                         goto out_free;
5074                                 }
5075                                 memcpy(request->match_sets[i].ssid.ssid,
5076                                        nla_data(ssid), nla_len(ssid));
5077                                 request->match_sets[i].ssid.ssid_len =
5078                                         nla_len(ssid);
5079                         }
5080                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5081                         if (rssi)
5082                                 request->rssi_thold = nla_get_u32(rssi);
5083                         else
5084                                 request->rssi_thold =
5085                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5086                         i++;
5087                 }
5088         }
5089
5090         if (info->attrs[NL80211_ATTR_IE]) {
5091                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5092                 memcpy((void *)request->ie,
5093                        nla_data(info->attrs[NL80211_ATTR_IE]),
5094                        request->ie_len);
5095         }
5096
5097         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5098                 request->flags = nla_get_u32(
5099                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5100                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5101                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5102                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5103                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5104                         err = -EOPNOTSUPP;
5105                         goto out_free;
5106                 }
5107         }
5108
5109         request->dev = dev;
5110         request->wiphy = &rdev->wiphy;
5111         request->interval = interval;
5112         request->scan_start = jiffies;
5113
5114         err = rdev_sched_scan_start(rdev, dev, request);
5115         if (!err) {
5116                 rdev->sched_scan_req = request;
5117                 nl80211_send_sched_scan(rdev, dev,
5118                                         NL80211_CMD_START_SCHED_SCAN);
5119                 goto out;
5120         }
5121
5122 out_free:
5123         kfree(request);
5124 out:
5125         mutex_unlock(&rdev->sched_scan_mtx);
5126         return err;
5127 }
5128
5129 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5130                                    struct genl_info *info)
5131 {
5132         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5133         int err;
5134
5135         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5136             !rdev->ops->sched_scan_stop)
5137                 return -EOPNOTSUPP;
5138
5139         mutex_lock(&rdev->sched_scan_mtx);
5140         err = __cfg80211_stop_sched_scan(rdev, false);
5141         mutex_unlock(&rdev->sched_scan_mtx);
5142
5143         return err;
5144 }
5145
5146 static int nl80211_start_radar_detection(struct sk_buff *skb,
5147                                          struct genl_info *info)
5148 {
5149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5150         struct net_device *dev = info->user_ptr[1];
5151         struct wireless_dev *wdev = dev->ieee80211_ptr;
5152         struct cfg80211_chan_def chandef;
5153         int err;
5154
5155         err = nl80211_parse_chandef(rdev, info, &chandef);
5156         if (err)
5157                 return err;
5158
5159         if (wdev->cac_started)
5160                 return -EBUSY;
5161
5162         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5163         if (err < 0)
5164                 return err;
5165
5166         if (err == 0)
5167                 return -EINVAL;
5168
5169         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5170                 return -EINVAL;
5171
5172         if (!rdev->ops->start_radar_detection)
5173                 return -EOPNOTSUPP;
5174
5175         mutex_lock(&rdev->devlist_mtx);
5176         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5177                                            chandef.chan, CHAN_MODE_SHARED,
5178                                            BIT(chandef.width));
5179         if (err)
5180                 goto err_locked;
5181
5182         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5183         if (!err) {
5184                 wdev->channel = chandef.chan;
5185                 wdev->cac_started = true;
5186                 wdev->cac_start_time = jiffies;
5187         }
5188 err_locked:
5189         mutex_unlock(&rdev->devlist_mtx);
5190
5191         return err;
5192 }
5193
5194 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5195                             u32 seq, int flags,
5196                             struct cfg80211_registered_device *rdev,
5197                             struct wireless_dev *wdev,
5198                             struct cfg80211_internal_bss *intbss)
5199 {
5200         struct cfg80211_bss *res = &intbss->pub;
5201         const struct cfg80211_bss_ies *ies;
5202         void *hdr;
5203         struct nlattr *bss;
5204         bool tsf = false;
5205
5206         ASSERT_WDEV_LOCK(wdev);
5207
5208         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5209                              NL80211_CMD_NEW_SCAN_RESULTS);
5210         if (!hdr)
5211                 return -1;
5212
5213         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5214
5215         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
5216             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5217                 goto nla_put_failure;
5218
5219         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5220         if (!bss)
5221                 goto nla_put_failure;
5222         if ((!is_zero_ether_addr(res->bssid) &&
5223              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5224                 goto nla_put_failure;
5225
5226         rcu_read_lock();
5227         ies = rcu_dereference(res->ies);
5228         if (ies) {
5229                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5230                         goto fail_unlock_rcu;
5231                 tsf = true;
5232                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5233                                         ies->len, ies->data))
5234                         goto fail_unlock_rcu;
5235         }
5236         ies = rcu_dereference(res->beacon_ies);
5237         if (ies) {
5238                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5239                         goto fail_unlock_rcu;
5240                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5241                                         ies->len, ies->data))
5242                         goto fail_unlock_rcu;
5243         }
5244         rcu_read_unlock();
5245
5246         if (res->beacon_interval &&
5247             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5248                 goto nla_put_failure;
5249         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5250             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5251             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5252                         jiffies_to_msecs(jiffies - intbss->ts)))
5253                 goto nla_put_failure;
5254
5255         switch (rdev->wiphy.signal_type) {
5256         case CFG80211_SIGNAL_TYPE_MBM:
5257                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5258                         goto nla_put_failure;
5259                 break;
5260         case CFG80211_SIGNAL_TYPE_UNSPEC:
5261                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5262                         goto nla_put_failure;
5263                 break;
5264         default:
5265                 break;
5266         }
5267
5268         switch (wdev->iftype) {
5269         case NL80211_IFTYPE_P2P_CLIENT:
5270         case NL80211_IFTYPE_STATION:
5271                 if (intbss == wdev->current_bss &&
5272                     nla_put_u32(msg, NL80211_BSS_STATUS,
5273                                 NL80211_BSS_STATUS_ASSOCIATED))
5274                         goto nla_put_failure;
5275                 break;
5276         case NL80211_IFTYPE_ADHOC:
5277                 if (intbss == wdev->current_bss &&
5278                     nla_put_u32(msg, NL80211_BSS_STATUS,
5279                                 NL80211_BSS_STATUS_IBSS_JOINED))
5280                         goto nla_put_failure;
5281                 break;
5282         default:
5283                 break;
5284         }
5285
5286         nla_nest_end(msg, bss);
5287
5288         return genlmsg_end(msg, hdr);
5289
5290  fail_unlock_rcu:
5291         rcu_read_unlock();
5292  nla_put_failure:
5293         genlmsg_cancel(msg, hdr);
5294         return -EMSGSIZE;
5295 }
5296
5297 static int nl80211_dump_scan(struct sk_buff *skb,
5298                              struct netlink_callback *cb)
5299 {
5300         struct cfg80211_registered_device *rdev;
5301         struct net_device *dev;
5302         struct cfg80211_internal_bss *scan;
5303         struct wireless_dev *wdev;
5304         int start = cb->args[1], idx = 0;
5305         int err;
5306
5307         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
5308         if (err)
5309                 return err;
5310
5311         wdev = dev->ieee80211_ptr;
5312
5313         wdev_lock(wdev);
5314         spin_lock_bh(&rdev->bss_lock);
5315         cfg80211_bss_expire(rdev);
5316
5317         cb->seq = rdev->bss_generation;
5318
5319         list_for_each_entry(scan, &rdev->bss_list, list) {
5320                 if (++idx <= start)
5321                         continue;
5322                 if (nl80211_send_bss(skb, cb,
5323                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5324                                 rdev, wdev, scan) < 0) {
5325                         idx--;
5326                         break;
5327                 }
5328         }
5329
5330         spin_unlock_bh(&rdev->bss_lock);
5331         wdev_unlock(wdev);
5332
5333         cb->args[1] = idx;
5334         nl80211_finish_netdev_dump(rdev);
5335
5336         return skb->len;
5337 }
5338
5339 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5340                                 int flags, struct net_device *dev,
5341                                 struct survey_info *survey)
5342 {
5343         void *hdr;
5344         struct nlattr *infoattr;
5345
5346         hdr = nl80211hdr_put(msg, portid, seq, flags,
5347                              NL80211_CMD_NEW_SURVEY_RESULTS);
5348         if (!hdr)
5349                 return -ENOMEM;
5350
5351         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5352                 goto nla_put_failure;
5353
5354         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5355         if (!infoattr)
5356                 goto nla_put_failure;
5357
5358         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5359                         survey->channel->center_freq))
5360                 goto nla_put_failure;
5361
5362         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5363             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5364                 goto nla_put_failure;
5365         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5366             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5367                 goto nla_put_failure;
5368         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5369             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5370                         survey->channel_time))
5371                 goto nla_put_failure;
5372         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5373             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5374                         survey->channel_time_busy))
5375                 goto nla_put_failure;
5376         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5377             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5378                         survey->channel_time_ext_busy))
5379                 goto nla_put_failure;
5380         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5381             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5382                         survey->channel_time_rx))
5383                 goto nla_put_failure;
5384         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5385             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5386                         survey->channel_time_tx))
5387                 goto nla_put_failure;
5388
5389         nla_nest_end(msg, infoattr);
5390
5391         return genlmsg_end(msg, hdr);
5392
5393  nla_put_failure:
5394         genlmsg_cancel(msg, hdr);
5395         return -EMSGSIZE;
5396 }
5397
5398 static int nl80211_dump_survey(struct sk_buff *skb,
5399                         struct netlink_callback *cb)
5400 {
5401         struct survey_info survey;
5402         struct cfg80211_registered_device *dev;
5403         struct net_device *netdev;
5404         int survey_idx = cb->args[1];
5405         int res;
5406
5407         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5408         if (res)
5409                 return res;
5410
5411         if (!dev->ops->dump_survey) {
5412                 res = -EOPNOTSUPP;
5413                 goto out_err;
5414         }
5415
5416         while (1) {
5417                 struct ieee80211_channel *chan;
5418
5419                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5420                 if (res == -ENOENT)
5421                         break;
5422                 if (res)
5423                         goto out_err;
5424
5425                 /* Survey without a channel doesn't make sense */
5426                 if (!survey.channel) {
5427                         res = -EINVAL;
5428                         goto out;
5429                 }
5430
5431                 chan = ieee80211_get_channel(&dev->wiphy,
5432                                              survey.channel->center_freq);
5433                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5434                         survey_idx++;
5435                         continue;
5436                 }
5437
5438                 if (nl80211_send_survey(skb,
5439                                 NETLINK_CB(cb->skb).portid,
5440                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5441                                 netdev,
5442                                 &survey) < 0)
5443                         goto out;
5444                 survey_idx++;
5445         }
5446
5447  out:
5448         cb->args[1] = survey_idx;
5449         res = skb->len;
5450  out_err:
5451         nl80211_finish_netdev_dump(dev);
5452         return res;
5453 }
5454
5455 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5456 {
5457         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5458                                   NL80211_WPA_VERSION_2));
5459 }
5460
5461 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5462 {
5463         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5464         struct net_device *dev = info->user_ptr[1];
5465         struct ieee80211_channel *chan;
5466         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5467         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5468         enum nl80211_auth_type auth_type;
5469         struct key_parse key;
5470         bool local_state_change;
5471
5472         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5473                 return -EINVAL;
5474
5475         if (!info->attrs[NL80211_ATTR_MAC])
5476                 return -EINVAL;
5477
5478         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5479                 return -EINVAL;
5480
5481         if (!info->attrs[NL80211_ATTR_SSID])
5482                 return -EINVAL;
5483
5484         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5485                 return -EINVAL;
5486
5487         err = nl80211_parse_key(info, &key);
5488         if (err)
5489                 return err;
5490
5491         if (key.idx >= 0) {
5492                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5493                         return -EINVAL;
5494                 if (!key.p.key || !key.p.key_len)
5495                         return -EINVAL;
5496                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5497                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5498                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5499                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5500                         return -EINVAL;
5501                 if (key.idx > 4)
5502                         return -EINVAL;
5503         } else {
5504                 key.p.key_len = 0;
5505                 key.p.key = NULL;
5506         }
5507
5508         if (key.idx >= 0) {
5509                 int i;
5510                 bool ok = false;
5511                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5512                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5513                                 ok = true;
5514                                 break;
5515                         }
5516                 }
5517                 if (!ok)
5518                         return -EINVAL;
5519         }
5520
5521         if (!rdev->ops->auth)
5522                 return -EOPNOTSUPP;
5523
5524         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5525             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5526                 return -EOPNOTSUPP;
5527
5528         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5529         chan = ieee80211_get_channel(&rdev->wiphy,
5530                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5531         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5532                 return -EINVAL;
5533
5534         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5535         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5536
5537         if (info->attrs[NL80211_ATTR_IE]) {
5538                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5539                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5540         }
5541
5542         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5543         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5544                 return -EINVAL;
5545
5546         if (auth_type == NL80211_AUTHTYPE_SAE &&
5547             !info->attrs[NL80211_ATTR_SAE_DATA])
5548                 return -EINVAL;
5549
5550         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5551                 if (auth_type != NL80211_AUTHTYPE_SAE)
5552                         return -EINVAL;
5553                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5554                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5555                 /* need to include at least Auth Transaction and Status Code */
5556                 if (sae_data_len < 4)
5557                         return -EINVAL;
5558         }
5559
5560         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5561
5562         /*
5563          * Since we no longer track auth state, ignore
5564          * requests to only change local state.
5565          */
5566         if (local_state_change)
5567                 return 0;
5568
5569         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5570                                   ssid, ssid_len, ie, ie_len,
5571                                   key.p.key, key.p.key_len, key.idx,
5572                                   sae_data, sae_data_len);
5573 }
5574
5575 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5576                                    struct genl_info *info,
5577                                    struct cfg80211_crypto_settings *settings,
5578                                    int cipher_limit)
5579 {
5580         memset(settings, 0, sizeof(*settings));
5581
5582         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5583
5584         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5585                 u16 proto;
5586                 proto = nla_get_u16(
5587                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5588                 settings->control_port_ethertype = cpu_to_be16(proto);
5589                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5590                     proto != ETH_P_PAE)
5591                         return -EINVAL;
5592                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5593                         settings->control_port_no_encrypt = true;
5594         } else
5595                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5596
5597         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5598                 void *data;
5599                 int len, i;
5600
5601                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5602                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5603                 settings->n_ciphers_pairwise = len / sizeof(u32);
5604
5605                 if (len % sizeof(u32))
5606                         return -EINVAL;
5607
5608                 if (settings->n_ciphers_pairwise > cipher_limit)
5609                         return -EINVAL;
5610
5611                 memcpy(settings->ciphers_pairwise, data, len);
5612
5613                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5614                         if (!cfg80211_supported_cipher_suite(
5615                                         &rdev->wiphy,
5616                                         settings->ciphers_pairwise[i]))
5617                                 return -EINVAL;
5618         }
5619
5620         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5621                 settings->cipher_group =
5622                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5623                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5624                                                      settings->cipher_group))
5625                         return -EINVAL;
5626         }
5627
5628         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5629                 settings->wpa_versions =
5630                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5631                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5632                         return -EINVAL;
5633         }
5634
5635         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5636                 void *data;
5637                 int len;
5638
5639                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5640                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5641                 settings->n_akm_suites = len / sizeof(u32);
5642
5643                 if (len % sizeof(u32))
5644                         return -EINVAL;
5645
5646                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5647                         return -EINVAL;
5648
5649                 memcpy(settings->akm_suites, data, len);
5650         }
5651
5652         return 0;
5653 }
5654
5655 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5656 {
5657         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5658         struct net_device *dev = info->user_ptr[1];
5659         struct cfg80211_crypto_settings crypto;
5660         struct ieee80211_channel *chan;
5661         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5662         int err, ssid_len, ie_len = 0;
5663         bool use_mfp = false;
5664         u32 flags = 0;
5665         struct ieee80211_ht_cap *ht_capa = NULL;
5666         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5667
5668         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5669                 return -EINVAL;
5670
5671         if (!info->attrs[NL80211_ATTR_MAC] ||
5672             !info->attrs[NL80211_ATTR_SSID] ||
5673             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5674                 return -EINVAL;
5675
5676         if (!rdev->ops->assoc)
5677                 return -EOPNOTSUPP;
5678
5679         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5680             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5681                 return -EOPNOTSUPP;
5682
5683         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5684
5685         chan = ieee80211_get_channel(&rdev->wiphy,
5686                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5687         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5688                 return -EINVAL;
5689
5690         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5691         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5692
5693         if (info->attrs[NL80211_ATTR_IE]) {
5694                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5695                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5696         }
5697
5698         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5699                 enum nl80211_mfp mfp =
5700                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5701                 if (mfp == NL80211_MFP_REQUIRED)
5702                         use_mfp = true;
5703                 else if (mfp != NL80211_MFP_NO)
5704                         return -EINVAL;
5705         }
5706
5707         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5708                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5709
5710         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5711                 flags |= ASSOC_REQ_DISABLE_HT;
5712
5713         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5714                 ht_capa_mask =
5715                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5716
5717         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5718                 if (!ht_capa_mask)
5719                         return -EINVAL;
5720                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5721         }
5722
5723         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5724         if (!err)
5725                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5726                                           ssid, ssid_len, ie, ie_len, use_mfp,
5727                                           &crypto, flags, ht_capa,
5728                                           ht_capa_mask);
5729
5730         return err;
5731 }
5732
5733 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5734 {
5735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5736         struct net_device *dev = info->user_ptr[1];
5737         const u8 *ie = NULL, *bssid;
5738         int ie_len = 0;
5739         u16 reason_code;
5740         bool local_state_change;
5741
5742         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5743                 return -EINVAL;
5744
5745         if (!info->attrs[NL80211_ATTR_MAC])
5746                 return -EINVAL;
5747
5748         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5749                 return -EINVAL;
5750
5751         if (!rdev->ops->deauth)
5752                 return -EOPNOTSUPP;
5753
5754         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5755             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5756                 return -EOPNOTSUPP;
5757
5758         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5759
5760         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5761         if (reason_code == 0) {
5762                 /* Reason Code 0 is reserved */
5763                 return -EINVAL;
5764         }
5765
5766         if (info->attrs[NL80211_ATTR_IE]) {
5767                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5768                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5769         }
5770
5771         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5772
5773         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5774                                     local_state_change);
5775 }
5776
5777 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5778 {
5779         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5780         struct net_device *dev = info->user_ptr[1];
5781         const u8 *ie = NULL, *bssid;
5782         int ie_len = 0;
5783         u16 reason_code;
5784         bool local_state_change;
5785
5786         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5787                 return -EINVAL;
5788
5789         if (!info->attrs[NL80211_ATTR_MAC])
5790                 return -EINVAL;
5791
5792         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5793                 return -EINVAL;
5794
5795         if (!rdev->ops->disassoc)
5796                 return -EOPNOTSUPP;
5797
5798         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5799             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5800                 return -EOPNOTSUPP;
5801
5802         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5803
5804         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5805         if (reason_code == 0) {
5806                 /* Reason Code 0 is reserved */
5807                 return -EINVAL;
5808         }
5809
5810         if (info->attrs[NL80211_ATTR_IE]) {
5811                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5812                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5813         }
5814
5815         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5816
5817         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5818                                       local_state_change);
5819 }
5820
5821 static bool
5822 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5823                          int mcast_rate[IEEE80211_NUM_BANDS],
5824                          int rateval)
5825 {
5826         struct wiphy *wiphy = &rdev->wiphy;
5827         bool found = false;
5828         int band, i;
5829
5830         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5831                 struct ieee80211_supported_band *sband;
5832
5833                 sband = wiphy->bands[band];
5834                 if (!sband)
5835                         continue;
5836
5837                 for (i = 0; i < sband->n_bitrates; i++) {
5838                         if (sband->bitrates[i].bitrate == rateval) {
5839                                 mcast_rate[band] = i + 1;
5840                                 found = true;
5841                                 break;
5842                         }
5843                 }
5844         }
5845
5846         return found;
5847 }
5848
5849 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5850 {
5851         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5852         struct net_device *dev = info->user_ptr[1];
5853         struct cfg80211_ibss_params ibss;
5854         struct wiphy *wiphy;
5855         struct cfg80211_cached_keys *connkeys = NULL;
5856         int err;
5857
5858         memset(&ibss, 0, sizeof(ibss));
5859
5860         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5861                 return -EINVAL;
5862
5863         if (!info->attrs[NL80211_ATTR_SSID] ||
5864             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5865                 return -EINVAL;
5866
5867         ibss.beacon_interval = 100;
5868
5869         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5870                 ibss.beacon_interval =
5871                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5872                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5873                         return -EINVAL;
5874         }
5875
5876         if (!rdev->ops->join_ibss)
5877                 return -EOPNOTSUPP;
5878
5879         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5880                 return -EOPNOTSUPP;
5881
5882         wiphy = &rdev->wiphy;
5883
5884         if (info->attrs[NL80211_ATTR_MAC]) {
5885                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5886
5887                 if (!is_valid_ether_addr(ibss.bssid))
5888                         return -EINVAL;
5889         }
5890         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5891         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5892
5893         if (info->attrs[NL80211_ATTR_IE]) {
5894                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5895                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5896         }
5897
5898         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5899         if (err)
5900                 return err;
5901
5902         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5903                 return -EINVAL;
5904
5905         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5906                 return -EINVAL;
5907         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5908             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5909                 return -EINVAL;
5910
5911         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5912         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5913
5914         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5915                 u8 *rates =
5916                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5917                 int n_rates =
5918                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5919                 struct ieee80211_supported_band *sband =
5920                         wiphy->bands[ibss.chandef.chan->band];
5921
5922                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5923                                              &ibss.basic_rates);
5924                 if (err)
5925                         return err;
5926         }
5927
5928         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5929             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5930                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5931                 return -EINVAL;
5932
5933         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5934                 bool no_ht = false;
5935
5936                 connkeys = nl80211_parse_connkeys(rdev,
5937                                           info->attrs[NL80211_ATTR_KEYS],
5938                                           &no_ht);
5939                 if (IS_ERR(connkeys))
5940                         return PTR_ERR(connkeys);
5941
5942                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5943                     no_ht) {
5944                         kfree(connkeys);
5945                         return -EINVAL;
5946                 }
5947         }
5948
5949         ibss.control_port =
5950                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5951
5952         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5953         if (err)
5954                 kfree(connkeys);
5955         return err;
5956 }
5957
5958 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5959 {
5960         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5961         struct net_device *dev = info->user_ptr[1];
5962
5963         if (!rdev->ops->leave_ibss)
5964                 return -EOPNOTSUPP;
5965
5966         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5967                 return -EOPNOTSUPP;
5968
5969         return cfg80211_leave_ibss(rdev, dev, false);
5970 }
5971
5972 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5973 {
5974         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5975         struct net_device *dev = info->user_ptr[1];
5976         int mcast_rate[IEEE80211_NUM_BANDS];
5977         u32 nla_rate;
5978         int err;
5979
5980         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5981             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5982                 return -EOPNOTSUPP;
5983
5984         if (!rdev->ops->set_mcast_rate)
5985                 return -EOPNOTSUPP;
5986
5987         memset(mcast_rate, 0, sizeof(mcast_rate));
5988
5989         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5990                 return -EINVAL;
5991
5992         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5993         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5994                 return -EINVAL;
5995
5996         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5997
5998         return err;
5999 }
6000
6001
6002 #ifdef CONFIG_NL80211_TESTMODE
6003 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6004         .name = "testmode",
6005 };
6006
6007 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6008 {
6009         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6010         int err;
6011
6012         if (!info->attrs[NL80211_ATTR_TESTDATA])
6013                 return -EINVAL;
6014
6015         err = -EOPNOTSUPP;
6016         if (rdev->ops->testmode_cmd) {
6017                 rdev->testmode_info = info;
6018                 err = rdev_testmode_cmd(rdev,
6019                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6020                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6021                 rdev->testmode_info = NULL;
6022         }
6023
6024         return err;
6025 }
6026
6027 static int nl80211_testmode_dump(struct sk_buff *skb,
6028                                  struct netlink_callback *cb)
6029 {
6030         struct cfg80211_registered_device *rdev;
6031         int err;
6032         long phy_idx;
6033         void *data = NULL;
6034         int data_len = 0;
6035
6036         if (cb->args[0]) {
6037                 /*
6038                  * 0 is a valid index, but not valid for args[0],
6039                  * so we need to offset by 1.
6040                  */
6041                 phy_idx = cb->args[0] - 1;
6042         } else {
6043                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6044                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6045                                   nl80211_policy);
6046                 if (err)
6047                         return err;
6048
6049                 mutex_lock(&cfg80211_mutex);
6050                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6051                                                   nl80211_fam.attrbuf);
6052                 if (IS_ERR(rdev)) {
6053                         mutex_unlock(&cfg80211_mutex);
6054                         return PTR_ERR(rdev);
6055                 }
6056                 phy_idx = rdev->wiphy_idx;
6057                 rdev = NULL;
6058                 mutex_unlock(&cfg80211_mutex);
6059
6060                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6061                         cb->args[1] =
6062                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6063         }
6064
6065         if (cb->args[1]) {
6066                 data = nla_data((void *)cb->args[1]);
6067                 data_len = nla_len((void *)cb->args[1]);
6068         }
6069
6070         mutex_lock(&cfg80211_mutex);
6071         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6072         if (!rdev) {
6073                 mutex_unlock(&cfg80211_mutex);
6074                 return -ENOENT;
6075         }
6076         cfg80211_lock_rdev(rdev);
6077         mutex_unlock(&cfg80211_mutex);
6078
6079         if (!rdev->ops->testmode_dump) {
6080                 err = -EOPNOTSUPP;
6081                 goto out_err;
6082         }
6083
6084         while (1) {
6085                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6086                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6087                                            NL80211_CMD_TESTMODE);
6088                 struct nlattr *tmdata;
6089
6090                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6091                         genlmsg_cancel(skb, hdr);
6092                         break;
6093                 }
6094
6095                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6096                 if (!tmdata) {
6097                         genlmsg_cancel(skb, hdr);
6098                         break;
6099                 }
6100                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6101                 nla_nest_end(skb, tmdata);
6102
6103                 if (err == -ENOBUFS || err == -ENOENT) {
6104                         genlmsg_cancel(skb, hdr);
6105                         break;
6106                 } else if (err) {
6107                         genlmsg_cancel(skb, hdr);
6108                         goto out_err;
6109                 }
6110
6111                 genlmsg_end(skb, hdr);
6112         }
6113
6114         err = skb->len;
6115         /* see above */
6116         cb->args[0] = phy_idx + 1;
6117  out_err:
6118         cfg80211_unlock_rdev(rdev);
6119         return err;
6120 }
6121
6122 static struct sk_buff *
6123 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6124                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6125 {
6126         struct sk_buff *skb;
6127         void *hdr;
6128         struct nlattr *data;
6129
6130         skb = nlmsg_new(approxlen + 100, gfp);
6131         if (!skb)
6132                 return NULL;
6133
6134         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6135         if (!hdr) {
6136                 kfree_skb(skb);
6137                 return NULL;
6138         }
6139
6140         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6141                 goto nla_put_failure;
6142         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6143
6144         ((void **)skb->cb)[0] = rdev;
6145         ((void **)skb->cb)[1] = hdr;
6146         ((void **)skb->cb)[2] = data;
6147
6148         return skb;
6149
6150  nla_put_failure:
6151         kfree_skb(skb);
6152         return NULL;
6153 }
6154
6155 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6156                                                   int approxlen)
6157 {
6158         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6159
6160         if (WARN_ON(!rdev->testmode_info))
6161                 return NULL;
6162
6163         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6164                                 rdev->testmode_info->snd_portid,
6165                                 rdev->testmode_info->snd_seq,
6166                                 GFP_KERNEL);
6167 }
6168 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6169
6170 int cfg80211_testmode_reply(struct sk_buff *skb)
6171 {
6172         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6173         void *hdr = ((void **)skb->cb)[1];
6174         struct nlattr *data = ((void **)skb->cb)[2];
6175
6176         if (WARN_ON(!rdev->testmode_info)) {
6177                 kfree_skb(skb);
6178                 return -EINVAL;
6179         }
6180
6181         nla_nest_end(skb, data);
6182         genlmsg_end(skb, hdr);
6183         return genlmsg_reply(skb, rdev->testmode_info);
6184 }
6185 EXPORT_SYMBOL(cfg80211_testmode_reply);
6186
6187 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6188                                                   int approxlen, gfp_t gfp)
6189 {
6190         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6191
6192         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6193 }
6194 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6195
6196 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6197 {
6198         void *hdr = ((void **)skb->cb)[1];
6199         struct nlattr *data = ((void **)skb->cb)[2];
6200
6201         nla_nest_end(skb, data);
6202         genlmsg_end(skb, hdr);
6203         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6204 }
6205 EXPORT_SYMBOL(cfg80211_testmode_event);
6206 #endif
6207
6208 static int nl80211_connect(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 cfg80211_connect_params connect;
6213         struct wiphy *wiphy;
6214         struct cfg80211_cached_keys *connkeys = NULL;
6215         int err;
6216
6217         memset(&connect, 0, sizeof(connect));
6218
6219         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6220                 return -EINVAL;
6221
6222         if (!info->attrs[NL80211_ATTR_SSID] ||
6223             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6224                 return -EINVAL;
6225
6226         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6227                 connect.auth_type =
6228                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6229                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6230                                              NL80211_CMD_CONNECT))
6231                         return -EINVAL;
6232         } else
6233                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6234
6235         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6236
6237         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6238                                       NL80211_MAX_NR_CIPHER_SUITES);
6239         if (err)
6240                 return err;
6241
6242         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6243             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6244                 return -EOPNOTSUPP;
6245
6246         wiphy = &rdev->wiphy;
6247
6248         connect.bg_scan_period = -1;
6249         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6250                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6251                 connect.bg_scan_period =
6252                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6253         }
6254
6255         if (info->attrs[NL80211_ATTR_MAC])
6256                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6257         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6258         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6259
6260         if (info->attrs[NL80211_ATTR_IE]) {
6261                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6262                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6263         }
6264
6265         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6266                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6267                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6268                     connect.mfp != NL80211_MFP_NO)
6269                         return -EINVAL;
6270         } else {
6271                 connect.mfp = NL80211_MFP_NO;
6272         }
6273
6274         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6275                 connect.channel =
6276                         ieee80211_get_channel(wiphy,
6277                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6278                 if (!connect.channel ||
6279                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6280                         return -EINVAL;
6281         }
6282
6283         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6284                 connkeys = nl80211_parse_connkeys(rdev,
6285                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6286                 if (IS_ERR(connkeys))
6287                         return PTR_ERR(connkeys);
6288         }
6289
6290         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6291                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6292
6293         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6294                 memcpy(&connect.ht_capa_mask,
6295                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6296                        sizeof(connect.ht_capa_mask));
6297
6298         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6299                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6300                         kfree(connkeys);
6301                         return -EINVAL;
6302                 }
6303                 memcpy(&connect.ht_capa,
6304                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6305                        sizeof(connect.ht_capa));
6306         }
6307
6308         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6309         if (err)
6310                 kfree(connkeys);
6311         return err;
6312 }
6313
6314 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6315 {
6316         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6317         struct net_device *dev = info->user_ptr[1];
6318         u16 reason;
6319
6320         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6321                 reason = WLAN_REASON_DEAUTH_LEAVING;
6322         else
6323                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6324
6325         if (reason == 0)
6326                 return -EINVAL;
6327
6328         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6329             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6330                 return -EOPNOTSUPP;
6331
6332         return cfg80211_disconnect(rdev, dev, reason, true);
6333 }
6334
6335 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6336 {
6337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6338         struct net *net;
6339         int err;
6340         u32 pid;
6341
6342         if (!info->attrs[NL80211_ATTR_PID])
6343                 return -EINVAL;
6344
6345         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6346
6347         net = get_net_ns_by_pid(pid);
6348         if (IS_ERR(net))
6349                 return PTR_ERR(net);
6350
6351         err = 0;
6352
6353         /* check if anything to do */
6354         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6355                 err = cfg80211_switch_netns(rdev, net);
6356
6357         put_net(net);
6358         return err;
6359 }
6360
6361 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6362 {
6363         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6364         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6365                         struct cfg80211_pmksa *pmksa) = NULL;
6366         struct net_device *dev = info->user_ptr[1];
6367         struct cfg80211_pmksa pmksa;
6368
6369         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6370
6371         if (!info->attrs[NL80211_ATTR_MAC])
6372                 return -EINVAL;
6373
6374         if (!info->attrs[NL80211_ATTR_PMKID])
6375                 return -EINVAL;
6376
6377         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6378         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6379
6380         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6381             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6382                 return -EOPNOTSUPP;
6383
6384         switch (info->genlhdr->cmd) {
6385         case NL80211_CMD_SET_PMKSA:
6386                 rdev_ops = rdev->ops->set_pmksa;
6387                 break;
6388         case NL80211_CMD_DEL_PMKSA:
6389                 rdev_ops = rdev->ops->del_pmksa;
6390                 break;
6391         default:
6392                 WARN_ON(1);
6393                 break;
6394         }
6395
6396         if (!rdev_ops)
6397                 return -EOPNOTSUPP;
6398
6399         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6400 }
6401
6402 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6403 {
6404         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6405         struct net_device *dev = info->user_ptr[1];
6406
6407         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6408             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6409                 return -EOPNOTSUPP;
6410
6411         if (!rdev->ops->flush_pmksa)
6412                 return -EOPNOTSUPP;
6413
6414         return rdev_flush_pmksa(rdev, dev);
6415 }
6416
6417 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6418 {
6419         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6420         struct net_device *dev = info->user_ptr[1];
6421         u8 action_code, dialog_token;
6422         u16 status_code;
6423         u8 *peer;
6424
6425         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6426             !rdev->ops->tdls_mgmt)
6427                 return -EOPNOTSUPP;
6428
6429         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6430             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6431             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6432             !info->attrs[NL80211_ATTR_IE] ||
6433             !info->attrs[NL80211_ATTR_MAC])
6434                 return -EINVAL;
6435
6436         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6437         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6438         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6439         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6440
6441         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6442                               dialog_token, status_code,
6443                               nla_data(info->attrs[NL80211_ATTR_IE]),
6444                               nla_len(info->attrs[NL80211_ATTR_IE]));
6445 }
6446
6447 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6448 {
6449         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6450         struct net_device *dev = info->user_ptr[1];
6451         enum nl80211_tdls_operation operation;
6452         u8 *peer;
6453
6454         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6455             !rdev->ops->tdls_oper)
6456                 return -EOPNOTSUPP;
6457
6458         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6459             !info->attrs[NL80211_ATTR_MAC])
6460                 return -EINVAL;
6461
6462         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6463         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6464
6465         return rdev_tdls_oper(rdev, dev, peer, operation);
6466 }
6467
6468 static int nl80211_remain_on_channel(struct sk_buff *skb,
6469                                      struct genl_info *info)
6470 {
6471         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6472         struct wireless_dev *wdev = info->user_ptr[1];
6473         struct cfg80211_chan_def chandef;
6474         struct sk_buff *msg;
6475         void *hdr;
6476         u64 cookie;
6477         u32 duration;
6478         int err;
6479
6480         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6481             !info->attrs[NL80211_ATTR_DURATION])
6482                 return -EINVAL;
6483
6484         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6485
6486         if (!rdev->ops->remain_on_channel ||
6487             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6488                 return -EOPNOTSUPP;
6489
6490         /*
6491          * We should be on that channel for at least a minimum amount of
6492          * time (10ms) but no longer than the driver supports.
6493          */
6494         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6495             duration > rdev->wiphy.max_remain_on_channel_duration)
6496                 return -EINVAL;
6497
6498         err = nl80211_parse_chandef(rdev, info, &chandef);
6499         if (err)
6500                 return err;
6501
6502         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6503         if (!msg)
6504                 return -ENOMEM;
6505
6506         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6507                              NL80211_CMD_REMAIN_ON_CHANNEL);
6508
6509         if (IS_ERR(hdr)) {
6510                 err = PTR_ERR(hdr);
6511                 goto free_msg;
6512         }
6513
6514         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6515                                      duration, &cookie);
6516
6517         if (err)
6518                 goto free_msg;
6519
6520         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6521                 goto nla_put_failure;
6522
6523         genlmsg_end(msg, hdr);
6524
6525         return genlmsg_reply(msg, info);
6526
6527  nla_put_failure:
6528         err = -ENOBUFS;
6529  free_msg:
6530         nlmsg_free(msg);
6531         return err;
6532 }
6533
6534 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6535                                             struct genl_info *info)
6536 {
6537         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6538         struct wireless_dev *wdev = info->user_ptr[1];
6539         u64 cookie;
6540
6541         if (!info->attrs[NL80211_ATTR_COOKIE])
6542                 return -EINVAL;
6543
6544         if (!rdev->ops->cancel_remain_on_channel)
6545                 return -EOPNOTSUPP;
6546
6547         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6548
6549         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6550 }
6551
6552 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6553                            u8 *rates, u8 rates_len)
6554 {
6555         u8 i;
6556         u32 mask = 0;
6557
6558         for (i = 0; i < rates_len; i++) {
6559                 int rate = (rates[i] & 0x7f) * 5;
6560                 int ridx;
6561                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6562                         struct ieee80211_rate *srate =
6563                                 &sband->bitrates[ridx];
6564                         if (rate == srate->bitrate) {
6565                                 mask |= 1 << ridx;
6566                                 break;
6567                         }
6568                 }
6569                 if (ridx == sband->n_bitrates)
6570                         return 0; /* rate not found */
6571         }
6572
6573         return mask;
6574 }
6575
6576 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6577                                u8 *rates, u8 rates_len,
6578                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6579 {
6580         u8 i;
6581
6582         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6583
6584         for (i = 0; i < rates_len; i++) {
6585                 int ridx, rbit;
6586
6587                 ridx = rates[i] / 8;
6588                 rbit = BIT(rates[i] % 8);
6589
6590                 /* check validity */
6591                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6592                         return false;
6593
6594                 /* check availability */
6595                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6596                         mcs[ridx] |= rbit;
6597                 else
6598                         return false;
6599         }
6600
6601         return true;
6602 }
6603
6604 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6605         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6606                                     .len = NL80211_MAX_SUPP_RATES },
6607         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6608                                  .len = NL80211_MAX_SUPP_HT_RATES },
6609 };
6610
6611 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6612                                        struct genl_info *info)
6613 {
6614         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6615         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6616         struct cfg80211_bitrate_mask mask;
6617         int rem, i;
6618         struct net_device *dev = info->user_ptr[1];
6619         struct nlattr *tx_rates;
6620         struct ieee80211_supported_band *sband;
6621
6622         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6623                 return -EINVAL;
6624
6625         if (!rdev->ops->set_bitrate_mask)
6626                 return -EOPNOTSUPP;
6627
6628         memset(&mask, 0, sizeof(mask));
6629         /* Default to all rates enabled */
6630         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6631                 sband = rdev->wiphy.bands[i];
6632                 mask.control[i].legacy =
6633                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6634                 if (sband)
6635                         memcpy(mask.control[i].mcs,
6636                                sband->ht_cap.mcs.rx_mask,
6637                                sizeof(mask.control[i].mcs));
6638                 else
6639                         memset(mask.control[i].mcs, 0,
6640                                sizeof(mask.control[i].mcs));
6641         }
6642
6643         /*
6644          * The nested attribute uses enum nl80211_band as the index. This maps
6645          * directly to the enum ieee80211_band values used in cfg80211.
6646          */
6647         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6648         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6649         {
6650                 enum ieee80211_band band = nla_type(tx_rates);
6651                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6652                         return -EINVAL;
6653                 sband = rdev->wiphy.bands[band];
6654                 if (sband == NULL)
6655                         return -EINVAL;
6656                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6657                           nla_len(tx_rates), nl80211_txattr_policy);
6658                 if (tb[NL80211_TXRATE_LEGACY]) {
6659                         mask.control[band].legacy = rateset_to_mask(
6660                                 sband,
6661                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6662                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6663                         if ((mask.control[band].legacy == 0) &&
6664                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6665                                 return -EINVAL;
6666                 }
6667                 if (tb[NL80211_TXRATE_MCS]) {
6668                         if (!ht_rateset_to_mask(
6669                                         sband,
6670                                         nla_data(tb[NL80211_TXRATE_MCS]),
6671                                         nla_len(tb[NL80211_TXRATE_MCS]),
6672                                         mask.control[band].mcs))
6673                                 return -EINVAL;
6674                 }
6675
6676                 if (mask.control[band].legacy == 0) {
6677                         /* don't allow empty legacy rates if HT
6678                          * is not even supported. */
6679                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6680                                 return -EINVAL;
6681
6682                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6683                                 if (mask.control[band].mcs[i])
6684                                         break;
6685
6686                         /* legacy and mcs rates may not be both empty */
6687                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6688                                 return -EINVAL;
6689                 }
6690         }
6691
6692         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6693 }
6694
6695 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6696 {
6697         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6698         struct wireless_dev *wdev = info->user_ptr[1];
6699         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6700
6701         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6702                 return -EINVAL;
6703
6704         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6705                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6706
6707         switch (wdev->iftype) {
6708         case NL80211_IFTYPE_STATION:
6709         case NL80211_IFTYPE_ADHOC:
6710         case NL80211_IFTYPE_P2P_CLIENT:
6711         case NL80211_IFTYPE_AP:
6712         case NL80211_IFTYPE_AP_VLAN:
6713         case NL80211_IFTYPE_MESH_POINT:
6714         case NL80211_IFTYPE_P2P_GO:
6715         case NL80211_IFTYPE_P2P_DEVICE:
6716                 break;
6717         default:
6718                 return -EOPNOTSUPP;
6719         }
6720
6721         /* not much point in registering if we can't reply */
6722         if (!rdev->ops->mgmt_tx)
6723                 return -EOPNOTSUPP;
6724
6725         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6726                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6727                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6728 }
6729
6730 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6731 {
6732         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6733         struct wireless_dev *wdev = info->user_ptr[1];
6734         struct cfg80211_chan_def chandef;
6735         int err;
6736         void *hdr = NULL;
6737         u64 cookie;
6738         struct sk_buff *msg = NULL;
6739         unsigned int wait = 0;
6740         bool offchan, no_cck, dont_wait_for_ack;
6741
6742         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6743
6744         if (!info->attrs[NL80211_ATTR_FRAME])
6745                 return -EINVAL;
6746
6747         if (!rdev->ops->mgmt_tx)
6748                 return -EOPNOTSUPP;
6749
6750         switch (wdev->iftype) {
6751         case NL80211_IFTYPE_STATION:
6752         case NL80211_IFTYPE_ADHOC:
6753         case NL80211_IFTYPE_P2P_CLIENT:
6754         case NL80211_IFTYPE_AP:
6755         case NL80211_IFTYPE_AP_VLAN:
6756         case NL80211_IFTYPE_MESH_POINT:
6757         case NL80211_IFTYPE_P2P_GO:
6758         case NL80211_IFTYPE_P2P_DEVICE:
6759                 break;
6760         default:
6761                 return -EOPNOTSUPP;
6762         }
6763
6764         if (info->attrs[NL80211_ATTR_DURATION]) {
6765                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6766                         return -EINVAL;
6767                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6768
6769                 /*
6770                  * We should wait on the channel for at least a minimum amount
6771                  * of time (10ms) but no longer than the driver supports.
6772                  */
6773                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6774                     wait > rdev->wiphy.max_remain_on_channel_duration)
6775                         return -EINVAL;
6776
6777         }
6778
6779         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6780
6781         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6782                 return -EINVAL;
6783
6784         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6785
6786         err = nl80211_parse_chandef(rdev, info, &chandef);
6787         if (err)
6788                 return err;
6789
6790         if (!dont_wait_for_ack) {
6791                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6792                 if (!msg)
6793                         return -ENOMEM;
6794
6795                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6796                                      NL80211_CMD_FRAME);
6797
6798                 if (IS_ERR(hdr)) {
6799                         err = PTR_ERR(hdr);
6800                         goto free_msg;
6801                 }
6802         }
6803
6804         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6805                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6806                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6807                                     no_cck, dont_wait_for_ack, &cookie);
6808         if (err)
6809                 goto free_msg;
6810
6811         if (msg) {
6812                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6813                         goto nla_put_failure;
6814
6815                 genlmsg_end(msg, hdr);
6816                 return genlmsg_reply(msg, info);
6817         }
6818
6819         return 0;
6820
6821  nla_put_failure:
6822         err = -ENOBUFS;
6823  free_msg:
6824         nlmsg_free(msg);
6825         return err;
6826 }
6827
6828 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6829 {
6830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6831         struct wireless_dev *wdev = info->user_ptr[1];
6832         u64 cookie;
6833
6834         if (!info->attrs[NL80211_ATTR_COOKIE])
6835                 return -EINVAL;
6836
6837         if (!rdev->ops->mgmt_tx_cancel_wait)
6838                 return -EOPNOTSUPP;
6839
6840         switch (wdev->iftype) {
6841         case NL80211_IFTYPE_STATION:
6842         case NL80211_IFTYPE_ADHOC:
6843         case NL80211_IFTYPE_P2P_CLIENT:
6844         case NL80211_IFTYPE_AP:
6845         case NL80211_IFTYPE_AP_VLAN:
6846         case NL80211_IFTYPE_P2P_GO:
6847         case NL80211_IFTYPE_P2P_DEVICE:
6848                 break;
6849         default:
6850                 return -EOPNOTSUPP;
6851         }
6852
6853         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6854
6855         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6856 }
6857
6858 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6859 {
6860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6861         struct wireless_dev *wdev;
6862         struct net_device *dev = info->user_ptr[1];
6863         u8 ps_state;
6864         bool state;
6865         int err;
6866
6867         if (!info->attrs[NL80211_ATTR_PS_STATE])
6868                 return -EINVAL;
6869
6870         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6871
6872         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6873                 return -EINVAL;
6874
6875         wdev = dev->ieee80211_ptr;
6876
6877         if (!rdev->ops->set_power_mgmt)
6878                 return -EOPNOTSUPP;
6879
6880         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6881
6882         if (state == wdev->ps)
6883                 return 0;
6884
6885         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6886         if (!err)
6887                 wdev->ps = state;
6888         return err;
6889 }
6890
6891 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6892 {
6893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6894         enum nl80211_ps_state ps_state;
6895         struct wireless_dev *wdev;
6896         struct net_device *dev = info->user_ptr[1];
6897         struct sk_buff *msg;
6898         void *hdr;
6899         int err;
6900
6901         wdev = dev->ieee80211_ptr;
6902
6903         if (!rdev->ops->set_power_mgmt)
6904                 return -EOPNOTSUPP;
6905
6906         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6907         if (!msg)
6908                 return -ENOMEM;
6909
6910         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6911                              NL80211_CMD_GET_POWER_SAVE);
6912         if (!hdr) {
6913                 err = -ENOBUFS;
6914                 goto free_msg;
6915         }
6916
6917         if (wdev->ps)
6918                 ps_state = NL80211_PS_ENABLED;
6919         else
6920                 ps_state = NL80211_PS_DISABLED;
6921
6922         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6923                 goto nla_put_failure;
6924
6925         genlmsg_end(msg, hdr);
6926         return genlmsg_reply(msg, info);
6927
6928  nla_put_failure:
6929         err = -ENOBUFS;
6930  free_msg:
6931         nlmsg_free(msg);
6932         return err;
6933 }
6934
6935 static struct nla_policy
6936 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6937         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6938         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6939         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6940         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6941         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6942         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6943 };
6944
6945 static int nl80211_set_cqm_txe(struct genl_info *info,
6946                                u32 rate, u32 pkts, u32 intvl)
6947 {
6948         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6949         struct wireless_dev *wdev;
6950         struct net_device *dev = info->user_ptr[1];
6951
6952         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6953                 return -EINVAL;
6954
6955         wdev = dev->ieee80211_ptr;
6956
6957         if (!rdev->ops->set_cqm_txe_config)
6958                 return -EOPNOTSUPP;
6959
6960         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6961             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6962                 return -EOPNOTSUPP;
6963
6964         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6965 }
6966
6967 static int nl80211_set_cqm_rssi(struct genl_info *info,
6968                                 s32 threshold, u32 hysteresis)
6969 {
6970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6971         struct wireless_dev *wdev;
6972         struct net_device *dev = info->user_ptr[1];
6973
6974         if (threshold > 0)
6975                 return -EINVAL;
6976
6977         wdev = dev->ieee80211_ptr;
6978
6979         if (!rdev->ops->set_cqm_rssi_config)
6980                 return -EOPNOTSUPP;
6981
6982         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6983             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6984                 return -EOPNOTSUPP;
6985
6986         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6987 }
6988
6989 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6990 {
6991         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6992         struct nlattr *cqm;
6993         int err;
6994
6995         cqm = info->attrs[NL80211_ATTR_CQM];
6996         if (!cqm) {
6997                 err = -EINVAL;
6998                 goto out;
6999         }
7000
7001         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7002                                nl80211_attr_cqm_policy);
7003         if (err)
7004                 goto out;
7005
7006         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7007             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7008                 s32 threshold;
7009                 u32 hysteresis;
7010                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7011                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7012                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7013         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7014                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7015                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7016                 u32 rate, pkts, intvl;
7017                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7018                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7019                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7020                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7021         } else
7022                 err = -EINVAL;
7023
7024 out:
7025         return err;
7026 }
7027
7028 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7029 {
7030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7031         struct net_device *dev = info->user_ptr[1];
7032         struct mesh_config cfg;
7033         struct mesh_setup setup;
7034         int err;
7035
7036         /* start with default */
7037         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7038         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7039
7040         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7041                 /* and parse parameters if given */
7042                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7043                 if (err)
7044                         return err;
7045         }
7046
7047         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7048             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7049                 return -EINVAL;
7050
7051         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7052         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7053
7054         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7055             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7056                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7057                         return -EINVAL;
7058
7059         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7060                 setup.beacon_interval =
7061                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7062                 if (setup.beacon_interval < 10 ||
7063                     setup.beacon_interval > 10000)
7064                         return -EINVAL;
7065         }
7066
7067         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7068                 setup.dtim_period =
7069                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7070                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7071                         return -EINVAL;
7072         }
7073
7074         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7075                 /* parse additional setup parameters if given */
7076                 err = nl80211_parse_mesh_setup(info, &setup);
7077                 if (err)
7078                         return err;
7079         }
7080
7081         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7082                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7083                 if (err)
7084                         return err;
7085         } else {
7086                 /* cfg80211_join_mesh() will sort it out */
7087                 setup.chandef.chan = NULL;
7088         }
7089
7090         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7091 }
7092
7093 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7094 {
7095         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7096         struct net_device *dev = info->user_ptr[1];
7097
7098         return cfg80211_leave_mesh(rdev, dev);
7099 }
7100
7101 #ifdef CONFIG_PM
7102 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7103                                         struct cfg80211_registered_device *rdev)
7104 {
7105         struct nlattr *nl_pats, *nl_pat;
7106         int i, pat_len;
7107
7108         if (!rdev->wowlan->n_patterns)
7109                 return 0;
7110
7111         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7112         if (!nl_pats)
7113                 return -ENOBUFS;
7114
7115         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7116                 nl_pat = nla_nest_start(msg, i + 1);
7117                 if (!nl_pat)
7118                         return -ENOBUFS;
7119                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7120                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7121                             DIV_ROUND_UP(pat_len, 8),
7122                             rdev->wowlan->patterns[i].mask) ||
7123                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7124                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7125                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7126                                 rdev->wowlan->patterns[i].pkt_offset))
7127                         return -ENOBUFS;
7128                 nla_nest_end(msg, nl_pat);
7129         }
7130         nla_nest_end(msg, nl_pats);
7131
7132         return 0;
7133 }
7134
7135 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7136                                    struct cfg80211_wowlan_tcp *tcp)
7137 {
7138         struct nlattr *nl_tcp;
7139
7140         if (!tcp)
7141                 return 0;
7142
7143         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7144         if (!nl_tcp)
7145                 return -ENOBUFS;
7146
7147         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7148             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7149             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7150             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7151             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7152             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7153                     tcp->payload_len, tcp->payload) ||
7154             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7155                         tcp->data_interval) ||
7156             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7157                     tcp->wake_len, tcp->wake_data) ||
7158             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7159                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7160                 return -ENOBUFS;
7161
7162         if (tcp->payload_seq.len &&
7163             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7164                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7165                 return -ENOBUFS;
7166
7167         if (tcp->payload_tok.len &&
7168             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7169                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7170                     &tcp->payload_tok))
7171                 return -ENOBUFS;
7172
7173         return 0;
7174 }
7175
7176 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7177 {
7178         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7179         struct sk_buff *msg;
7180         void *hdr;
7181         u32 size = NLMSG_DEFAULT_SIZE;
7182
7183         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7184             !rdev->wiphy.wowlan.tcp)
7185                 return -EOPNOTSUPP;
7186
7187         if (rdev->wowlan && rdev->wowlan->tcp) {
7188                 /* adjust size to have room for all the data */
7189                 size += rdev->wowlan->tcp->tokens_size +
7190                         rdev->wowlan->tcp->payload_len +
7191                         rdev->wowlan->tcp->wake_len +
7192                         rdev->wowlan->tcp->wake_len / 8;
7193         }
7194
7195         msg = nlmsg_new(size, GFP_KERNEL);
7196         if (!msg)
7197                 return -ENOMEM;
7198
7199         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7200                              NL80211_CMD_GET_WOWLAN);
7201         if (!hdr)
7202                 goto nla_put_failure;
7203
7204         if (rdev->wowlan) {
7205                 struct nlattr *nl_wowlan;
7206
7207                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7208                 if (!nl_wowlan)
7209                         goto nla_put_failure;
7210
7211                 if ((rdev->wowlan->any &&
7212                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7213                     (rdev->wowlan->disconnect &&
7214                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7215                     (rdev->wowlan->magic_pkt &&
7216                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7217                     (rdev->wowlan->gtk_rekey_failure &&
7218                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7219                     (rdev->wowlan->eap_identity_req &&
7220                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7221                     (rdev->wowlan->four_way_handshake &&
7222                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7223                     (rdev->wowlan->rfkill_release &&
7224                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7225                         goto nla_put_failure;
7226
7227                 if (nl80211_send_wowlan_patterns(msg, rdev))
7228                         goto nla_put_failure;
7229
7230                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7231                         goto nla_put_failure;
7232
7233                 nla_nest_end(msg, nl_wowlan);
7234         }
7235
7236         genlmsg_end(msg, hdr);
7237         return genlmsg_reply(msg, info);
7238
7239 nla_put_failure:
7240         nlmsg_free(msg);
7241         return -ENOBUFS;
7242 }
7243
7244 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7245                                     struct nlattr *attr,
7246                                     struct cfg80211_wowlan *trig)
7247 {
7248         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7249         struct cfg80211_wowlan_tcp *cfg;
7250         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7251         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7252         u32 size;
7253         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7254         int err, port;
7255
7256         if (!rdev->wiphy.wowlan.tcp)
7257                 return -EINVAL;
7258
7259         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7260                         nla_data(attr), nla_len(attr),
7261                         nl80211_wowlan_tcp_policy);
7262         if (err)
7263                 return err;
7264
7265         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7266             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7267             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7268             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7269             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7270             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7271             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7272             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7273                 return -EINVAL;
7274
7275         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7276         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7277                 return -EINVAL;
7278
7279         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7280                         rdev->wiphy.wowlan.tcp->data_interval_max)
7281                 return -EINVAL;
7282
7283         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7284         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7285                 return -EINVAL;
7286
7287         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7288         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7289                 return -EINVAL;
7290
7291         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7292                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7293
7294                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7295                 tokens_size = tokln - sizeof(*tok);
7296
7297                 if (!tok->len || tokens_size % tok->len)
7298                         return -EINVAL;
7299                 if (!rdev->wiphy.wowlan.tcp->tok)
7300                         return -EINVAL;
7301                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7302                         return -EINVAL;
7303                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7304                         return -EINVAL;
7305                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7306                         return -EINVAL;
7307                 if (tok->offset + tok->len > data_size)
7308                         return -EINVAL;
7309         }
7310
7311         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7312                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7313                 if (!rdev->wiphy.wowlan.tcp->seq)
7314                         return -EINVAL;
7315                 if (seq->len == 0 || seq->len > 4)
7316                         return -EINVAL;
7317                 if (seq->len + seq->offset > data_size)
7318                         return -EINVAL;
7319         }
7320
7321         size = sizeof(*cfg);
7322         size += data_size;
7323         size += wake_size + wake_mask_size;
7324         size += tokens_size;
7325
7326         cfg = kzalloc(size, GFP_KERNEL);
7327         if (!cfg)
7328                 return -ENOMEM;
7329         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7330         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7331         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7332                ETH_ALEN);
7333         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7334                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7335         else
7336                 port = 0;
7337 #ifdef CONFIG_INET
7338         /* allocate a socket and port for it and use it */
7339         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7340                             IPPROTO_TCP, &cfg->sock, 1);
7341         if (err) {
7342                 kfree(cfg);
7343                 return err;
7344         }
7345         if (inet_csk_get_port(cfg->sock->sk, port)) {
7346                 sock_release(cfg->sock);
7347                 kfree(cfg);
7348                 return -EADDRINUSE;
7349         }
7350         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7351 #else
7352         if (!port) {
7353                 kfree(cfg);
7354                 return -EINVAL;
7355         }
7356         cfg->src_port = port;
7357 #endif
7358
7359         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7360         cfg->payload_len = data_size;
7361         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7362         memcpy((void *)cfg->payload,
7363                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7364                data_size);
7365         if (seq)
7366                 cfg->payload_seq = *seq;
7367         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7368         cfg->wake_len = wake_size;
7369         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7370         memcpy((void *)cfg->wake_data,
7371                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7372                wake_size);
7373         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7374                          data_size + wake_size;
7375         memcpy((void *)cfg->wake_mask,
7376                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7377                wake_mask_size);
7378         if (tok) {
7379                 cfg->tokens_size = tokens_size;
7380                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7381         }
7382
7383         trig->tcp = cfg;
7384
7385         return 0;
7386 }
7387
7388 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7389 {
7390         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7391         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7392         struct cfg80211_wowlan new_triggers = {};
7393         struct cfg80211_wowlan *ntrig;
7394         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7395         int err, i;
7396         bool prev_enabled = rdev->wowlan;
7397
7398         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7399             !rdev->wiphy.wowlan.tcp)
7400                 return -EOPNOTSUPP;
7401
7402         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7403                 cfg80211_rdev_free_wowlan(rdev);
7404                 rdev->wowlan = NULL;
7405                 goto set_wakeup;
7406         }
7407
7408         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7409                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7410                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7411                         nl80211_wowlan_policy);
7412         if (err)
7413                 return err;
7414
7415         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7416                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7417                         return -EINVAL;
7418                 new_triggers.any = true;
7419         }
7420
7421         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7422                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7423                         return -EINVAL;
7424                 new_triggers.disconnect = true;
7425         }
7426
7427         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7428                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7429                         return -EINVAL;
7430                 new_triggers.magic_pkt = true;
7431         }
7432
7433         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7434                 return -EINVAL;
7435
7436         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7437                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7438                         return -EINVAL;
7439                 new_triggers.gtk_rekey_failure = true;
7440         }
7441
7442         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7443                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7444                         return -EINVAL;
7445                 new_triggers.eap_identity_req = true;
7446         }
7447
7448         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7449                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7450                         return -EINVAL;
7451                 new_triggers.four_way_handshake = true;
7452         }
7453
7454         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7455                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7456                         return -EINVAL;
7457                 new_triggers.rfkill_release = true;
7458         }
7459
7460         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7461                 struct nlattr *pat;
7462                 int n_patterns = 0;
7463                 int rem, pat_len, mask_len, pkt_offset;
7464                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7465
7466                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7467                                     rem)
7468                         n_patterns++;
7469                 if (n_patterns > wowlan->n_patterns)
7470                         return -EINVAL;
7471
7472                 new_triggers.patterns = kcalloc(n_patterns,
7473                                                 sizeof(new_triggers.patterns[0]),
7474                                                 GFP_KERNEL);
7475                 if (!new_triggers.patterns)
7476                         return -ENOMEM;
7477
7478                 new_triggers.n_patterns = n_patterns;
7479                 i = 0;
7480
7481                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7482                                     rem) {
7483                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7484                                   nla_data(pat), nla_len(pat), NULL);
7485                         err = -EINVAL;
7486                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7487                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7488                                 goto error;
7489                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7490                         mask_len = DIV_ROUND_UP(pat_len, 8);
7491                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7492                             mask_len)
7493                                 goto error;
7494                         if (pat_len > wowlan->pattern_max_len ||
7495                             pat_len < wowlan->pattern_min_len)
7496                                 goto error;
7497
7498                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7499                                 pkt_offset = 0;
7500                         else
7501                                 pkt_offset = nla_get_u32(
7502                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7503                         if (pkt_offset > wowlan->max_pkt_offset)
7504                                 goto error;
7505                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7506
7507                         new_triggers.patterns[i].mask =
7508                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7509                         if (!new_triggers.patterns[i].mask) {
7510                                 err = -ENOMEM;
7511                                 goto error;
7512                         }
7513                         new_triggers.patterns[i].pattern =
7514                                 new_triggers.patterns[i].mask + mask_len;
7515                         memcpy(new_triggers.patterns[i].mask,
7516                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7517                                mask_len);
7518                         new_triggers.patterns[i].pattern_len = pat_len;
7519                         memcpy(new_triggers.patterns[i].pattern,
7520                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7521                                pat_len);
7522                         i++;
7523                 }
7524         }
7525
7526         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7527                 err = nl80211_parse_wowlan_tcp(
7528                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7529                         &new_triggers);
7530                 if (err)
7531                         goto error;
7532         }
7533
7534         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7535         if (!ntrig) {
7536                 err = -ENOMEM;
7537                 goto error;
7538         }
7539         cfg80211_rdev_free_wowlan(rdev);
7540         rdev->wowlan = ntrig;
7541
7542  set_wakeup:
7543         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7544                 rdev_set_wakeup(rdev, rdev->wowlan);
7545
7546         return 0;
7547  error:
7548         for (i = 0; i < new_triggers.n_patterns; i++)
7549                 kfree(new_triggers.patterns[i].mask);
7550         kfree(new_triggers.patterns);
7551         if (new_triggers.tcp && new_triggers.tcp->sock)
7552                 sock_release(new_triggers.tcp->sock);
7553         kfree(new_triggers.tcp);
7554         return err;
7555 }
7556 #endif
7557
7558 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7559 {
7560         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7561         struct net_device *dev = info->user_ptr[1];
7562         struct wireless_dev *wdev = dev->ieee80211_ptr;
7563         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7564         struct cfg80211_gtk_rekey_data rekey_data;
7565         int err;
7566
7567         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7568                 return -EINVAL;
7569
7570         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7571                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7572                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7573                         nl80211_rekey_policy);
7574         if (err)
7575                 return err;
7576
7577         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7578                 return -ERANGE;
7579         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7580                 return -ERANGE;
7581         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7582                 return -ERANGE;
7583
7584         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7585                NL80211_KEK_LEN);
7586         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7587                NL80211_KCK_LEN);
7588         memcpy(rekey_data.replay_ctr,
7589                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7590                NL80211_REPLAY_CTR_LEN);
7591
7592         wdev_lock(wdev);
7593         if (!wdev->current_bss) {
7594                 err = -ENOTCONN;
7595                 goto out;
7596         }
7597
7598         if (!rdev->ops->set_rekey_data) {
7599                 err = -EOPNOTSUPP;
7600                 goto out;
7601         }
7602
7603         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7604  out:
7605         wdev_unlock(wdev);
7606         return err;
7607 }
7608
7609 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
7610                                              struct genl_info *info)
7611 {
7612         struct net_device *dev = info->user_ptr[1];
7613         struct wireless_dev *wdev = dev->ieee80211_ptr;
7614
7615         if (wdev->iftype != NL80211_IFTYPE_AP &&
7616             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7617                 return -EINVAL;
7618
7619         if (wdev->ap_unexpected_nlportid)
7620                 return -EBUSY;
7621
7622         wdev->ap_unexpected_nlportid = info->snd_portid;
7623         return 0;
7624 }
7625
7626 static int nl80211_probe_client(struct sk_buff *skb,
7627                                 struct genl_info *info)
7628 {
7629         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7630         struct net_device *dev = info->user_ptr[1];
7631         struct wireless_dev *wdev = dev->ieee80211_ptr;
7632         struct sk_buff *msg;
7633         void *hdr;
7634         const u8 *addr;
7635         u64 cookie;
7636         int err;
7637
7638         if (wdev->iftype != NL80211_IFTYPE_AP &&
7639             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7640                 return -EOPNOTSUPP;
7641
7642         if (!info->attrs[NL80211_ATTR_MAC])
7643                 return -EINVAL;
7644
7645         if (!rdev->ops->probe_client)
7646                 return -EOPNOTSUPP;
7647
7648         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7649         if (!msg)
7650                 return -ENOMEM;
7651
7652         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7653                              NL80211_CMD_PROBE_CLIENT);
7654
7655         if (IS_ERR(hdr)) {
7656                 err = PTR_ERR(hdr);
7657                 goto free_msg;
7658         }
7659
7660         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7661
7662         err = rdev_probe_client(rdev, dev, addr, &cookie);
7663         if (err)
7664                 goto free_msg;
7665
7666         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7667                 goto nla_put_failure;
7668
7669         genlmsg_end(msg, hdr);
7670
7671         return genlmsg_reply(msg, info);
7672
7673  nla_put_failure:
7674         err = -ENOBUFS;
7675  free_msg:
7676         nlmsg_free(msg);
7677         return err;
7678 }
7679
7680 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7681 {
7682         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7683         struct cfg80211_beacon_registration *reg, *nreg;
7684         int rv;
7685
7686         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7687                 return -EOPNOTSUPP;
7688
7689         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7690         if (!nreg)
7691                 return -ENOMEM;
7692
7693         /* First, check if already registered. */
7694         spin_lock_bh(&rdev->beacon_registrations_lock);
7695         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7696                 if (reg->nlportid == info->snd_portid) {
7697                         rv = -EALREADY;
7698                         goto out_err;
7699                 }
7700         }
7701         /* Add it to the list */
7702         nreg->nlportid = info->snd_portid;
7703         list_add(&nreg->list, &rdev->beacon_registrations);
7704
7705         spin_unlock_bh(&rdev->beacon_registrations_lock);
7706
7707         return 0;
7708 out_err:
7709         spin_unlock_bh(&rdev->beacon_registrations_lock);
7710         kfree(nreg);
7711         return rv;
7712 }
7713
7714 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7715 {
7716         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7717         struct wireless_dev *wdev = info->user_ptr[1];
7718         int err;
7719
7720         if (!rdev->ops->start_p2p_device)
7721                 return -EOPNOTSUPP;
7722
7723         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7724                 return -EOPNOTSUPP;
7725
7726         if (wdev->p2p_started)
7727                 return 0;
7728
7729         mutex_lock(&rdev->devlist_mtx);
7730         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7731         mutex_unlock(&rdev->devlist_mtx);
7732         if (err)
7733                 return err;
7734
7735         err = rdev_start_p2p_device(rdev, wdev);
7736         if (err)
7737                 return err;
7738
7739         wdev->p2p_started = true;
7740         mutex_lock(&rdev->devlist_mtx);
7741         rdev->opencount++;
7742         mutex_unlock(&rdev->devlist_mtx);
7743
7744         return 0;
7745 }
7746
7747 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7748 {
7749         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7750         struct wireless_dev *wdev = info->user_ptr[1];
7751
7752         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7753                 return -EOPNOTSUPP;
7754
7755         if (!rdev->ops->stop_p2p_device)
7756                 return -EOPNOTSUPP;
7757
7758         if (!wdev->p2p_started)
7759                 return 0;
7760
7761         rdev_stop_p2p_device(rdev, wdev);
7762         wdev->p2p_started = false;
7763
7764         mutex_lock(&rdev->devlist_mtx);
7765         rdev->opencount--;
7766         mutex_unlock(&rdev->devlist_mtx);
7767
7768         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7769                 rdev->scan_req->aborted = true;
7770                 ___cfg80211_scan_done(rdev, true);
7771         }
7772
7773         return 0;
7774 }
7775
7776 #define NL80211_FLAG_NEED_WIPHY         0x01
7777 #define NL80211_FLAG_NEED_NETDEV        0x02
7778 #define NL80211_FLAG_NEED_RTNL          0x04
7779 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7780 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7781                                          NL80211_FLAG_CHECK_NETDEV_UP)
7782 #define NL80211_FLAG_NEED_WDEV          0x10
7783 /* If a netdev is associated, it must be UP, P2P must be started */
7784 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7785                                          NL80211_FLAG_CHECK_NETDEV_UP)
7786
7787 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7788                             struct genl_info *info)
7789 {
7790         struct cfg80211_registered_device *rdev;
7791         struct wireless_dev *wdev;
7792         struct net_device *dev;
7793         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7794
7795         if (rtnl)
7796                 rtnl_lock();
7797
7798         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7799                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7800                 if (IS_ERR(rdev)) {
7801                         if (rtnl)
7802                                 rtnl_unlock();
7803                         return PTR_ERR(rdev);
7804                 }
7805                 info->user_ptr[0] = rdev;
7806         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7807                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7808                 mutex_lock(&cfg80211_mutex);
7809                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7810                                                   info->attrs);
7811                 if (IS_ERR(wdev)) {
7812                         mutex_unlock(&cfg80211_mutex);
7813                         if (rtnl)
7814                                 rtnl_unlock();
7815                         return PTR_ERR(wdev);
7816                 }
7817
7818                 dev = wdev->netdev;
7819                 rdev = wiphy_to_dev(wdev->wiphy);
7820
7821                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7822                         if (!dev) {
7823                                 mutex_unlock(&cfg80211_mutex);
7824                                 if (rtnl)
7825                                         rtnl_unlock();
7826                                 return -EINVAL;
7827                         }
7828
7829                         info->user_ptr[1] = dev;
7830                 } else {
7831                         info->user_ptr[1] = wdev;
7832                 }
7833
7834                 if (dev) {
7835                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7836                             !netif_running(dev)) {
7837                                 mutex_unlock(&cfg80211_mutex);
7838                                 if (rtnl)
7839                                         rtnl_unlock();
7840                                 return -ENETDOWN;
7841                         }
7842
7843                         dev_hold(dev);
7844                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7845                         if (!wdev->p2p_started) {
7846                                 mutex_unlock(&cfg80211_mutex);
7847                                 if (rtnl)
7848                                         rtnl_unlock();
7849                                 return -ENETDOWN;
7850                         }
7851                 }
7852
7853                 cfg80211_lock_rdev(rdev);
7854
7855                 mutex_unlock(&cfg80211_mutex);
7856
7857                 info->user_ptr[0] = rdev;
7858         }
7859
7860         return 0;
7861 }
7862
7863 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7864                               struct genl_info *info)
7865 {
7866         if (info->user_ptr[0])
7867                 cfg80211_unlock_rdev(info->user_ptr[0]);
7868         if (info->user_ptr[1]) {
7869                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7870                         struct wireless_dev *wdev = info->user_ptr[1];
7871
7872                         if (wdev->netdev)
7873                                 dev_put(wdev->netdev);
7874                 } else {
7875                         dev_put(info->user_ptr[1]);
7876                 }
7877         }
7878         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7879                 rtnl_unlock();
7880 }
7881
7882 static struct genl_ops nl80211_ops[] = {
7883         {
7884                 .cmd = NL80211_CMD_GET_WIPHY,
7885                 .doit = nl80211_get_wiphy,
7886                 .dumpit = nl80211_dump_wiphy,
7887                 .policy = nl80211_policy,
7888                 /* can be retrieved by unprivileged users */
7889                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7890         },
7891         {
7892                 .cmd = NL80211_CMD_SET_WIPHY,
7893                 .doit = nl80211_set_wiphy,
7894                 .policy = nl80211_policy,
7895                 .flags = GENL_ADMIN_PERM,
7896                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7897         },
7898         {
7899                 .cmd = NL80211_CMD_GET_INTERFACE,
7900                 .doit = nl80211_get_interface,
7901                 .dumpit = nl80211_dump_interface,
7902                 .policy = nl80211_policy,
7903                 /* can be retrieved by unprivileged users */
7904                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7905         },
7906         {
7907                 .cmd = NL80211_CMD_SET_INTERFACE,
7908                 .doit = nl80211_set_interface,
7909                 .policy = nl80211_policy,
7910                 .flags = GENL_ADMIN_PERM,
7911                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7912                                   NL80211_FLAG_NEED_RTNL,
7913         },
7914         {
7915                 .cmd = NL80211_CMD_NEW_INTERFACE,
7916                 .doit = nl80211_new_interface,
7917                 .policy = nl80211_policy,
7918                 .flags = GENL_ADMIN_PERM,
7919                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7920                                   NL80211_FLAG_NEED_RTNL,
7921         },
7922         {
7923                 .cmd = NL80211_CMD_DEL_INTERFACE,
7924                 .doit = nl80211_del_interface,
7925                 .policy = nl80211_policy,
7926                 .flags = GENL_ADMIN_PERM,
7927                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7928                                   NL80211_FLAG_NEED_RTNL,
7929         },
7930         {
7931                 .cmd = NL80211_CMD_GET_KEY,
7932                 .doit = nl80211_get_key,
7933                 .policy = nl80211_policy,
7934                 .flags = GENL_ADMIN_PERM,
7935                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7936                                   NL80211_FLAG_NEED_RTNL,
7937         },
7938         {
7939                 .cmd = NL80211_CMD_SET_KEY,
7940                 .doit = nl80211_set_key,
7941                 .policy = nl80211_policy,
7942                 .flags = GENL_ADMIN_PERM,
7943                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7944                                   NL80211_FLAG_NEED_RTNL,
7945         },
7946         {
7947                 .cmd = NL80211_CMD_NEW_KEY,
7948                 .doit = nl80211_new_key,
7949                 .policy = nl80211_policy,
7950                 .flags = GENL_ADMIN_PERM,
7951                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7952                                   NL80211_FLAG_NEED_RTNL,
7953         },
7954         {
7955                 .cmd = NL80211_CMD_DEL_KEY,
7956                 .doit = nl80211_del_key,
7957                 .policy = nl80211_policy,
7958                 .flags = GENL_ADMIN_PERM,
7959                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7960                                   NL80211_FLAG_NEED_RTNL,
7961         },
7962         {
7963                 .cmd = NL80211_CMD_SET_BEACON,
7964                 .policy = nl80211_policy,
7965                 .flags = GENL_ADMIN_PERM,
7966                 .doit = nl80211_set_beacon,
7967                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7968                                   NL80211_FLAG_NEED_RTNL,
7969         },
7970         {
7971                 .cmd = NL80211_CMD_START_AP,
7972                 .policy = nl80211_policy,
7973                 .flags = GENL_ADMIN_PERM,
7974                 .doit = nl80211_start_ap,
7975                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7976                                   NL80211_FLAG_NEED_RTNL,
7977         },
7978         {
7979                 .cmd = NL80211_CMD_STOP_AP,
7980                 .policy = nl80211_policy,
7981                 .flags = GENL_ADMIN_PERM,
7982                 .doit = nl80211_stop_ap,
7983                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7984                                   NL80211_FLAG_NEED_RTNL,
7985         },
7986         {
7987                 .cmd = NL80211_CMD_GET_STATION,
7988                 .doit = nl80211_get_station,
7989                 .dumpit = nl80211_dump_station,
7990                 .policy = nl80211_policy,
7991                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7992                                   NL80211_FLAG_NEED_RTNL,
7993         },
7994         {
7995                 .cmd = NL80211_CMD_SET_STATION,
7996                 .doit = nl80211_set_station,
7997                 .policy = nl80211_policy,
7998                 .flags = GENL_ADMIN_PERM,
7999                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8000                                   NL80211_FLAG_NEED_RTNL,
8001         },
8002         {
8003                 .cmd = NL80211_CMD_NEW_STATION,
8004                 .doit = nl80211_new_station,
8005                 .policy = nl80211_policy,
8006                 .flags = GENL_ADMIN_PERM,
8007                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8008                                   NL80211_FLAG_NEED_RTNL,
8009         },
8010         {
8011                 .cmd = NL80211_CMD_DEL_STATION,
8012                 .doit = nl80211_del_station,
8013                 .policy = nl80211_policy,
8014                 .flags = GENL_ADMIN_PERM,
8015                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8016                                   NL80211_FLAG_NEED_RTNL,
8017         },
8018         {
8019                 .cmd = NL80211_CMD_GET_MPATH,
8020                 .doit = nl80211_get_mpath,
8021                 .dumpit = nl80211_dump_mpath,
8022                 .policy = nl80211_policy,
8023                 .flags = GENL_ADMIN_PERM,
8024                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8025                                   NL80211_FLAG_NEED_RTNL,
8026         },
8027         {
8028                 .cmd = NL80211_CMD_SET_MPATH,
8029                 .doit = nl80211_set_mpath,
8030                 .policy = nl80211_policy,
8031                 .flags = GENL_ADMIN_PERM,
8032                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8033                                   NL80211_FLAG_NEED_RTNL,
8034         },
8035         {
8036                 .cmd = NL80211_CMD_NEW_MPATH,
8037                 .doit = nl80211_new_mpath,
8038                 .policy = nl80211_policy,
8039                 .flags = GENL_ADMIN_PERM,
8040                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8041                                   NL80211_FLAG_NEED_RTNL,
8042         },
8043         {
8044                 .cmd = NL80211_CMD_DEL_MPATH,
8045                 .doit = nl80211_del_mpath,
8046                 .policy = nl80211_policy,
8047                 .flags = GENL_ADMIN_PERM,
8048                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8049                                   NL80211_FLAG_NEED_RTNL,
8050         },
8051         {
8052                 .cmd = NL80211_CMD_SET_BSS,
8053                 .doit = nl80211_set_bss,
8054                 .policy = nl80211_policy,
8055                 .flags = GENL_ADMIN_PERM,
8056                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8057                                   NL80211_FLAG_NEED_RTNL,
8058         },
8059         {
8060                 .cmd = NL80211_CMD_GET_REG,
8061                 .doit = nl80211_get_reg,
8062                 .policy = nl80211_policy,
8063                 /* can be retrieved by unprivileged users */
8064         },
8065         {
8066                 .cmd = NL80211_CMD_SET_REG,
8067                 .doit = nl80211_set_reg,
8068                 .policy = nl80211_policy,
8069                 .flags = GENL_ADMIN_PERM,
8070         },
8071         {
8072                 .cmd = NL80211_CMD_REQ_SET_REG,
8073                 .doit = nl80211_req_set_reg,
8074                 .policy = nl80211_policy,
8075                 .flags = GENL_ADMIN_PERM,
8076         },
8077         {
8078                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8079                 .doit = nl80211_get_mesh_config,
8080                 .policy = nl80211_policy,
8081                 /* can be retrieved by unprivileged users */
8082                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8083                                   NL80211_FLAG_NEED_RTNL,
8084         },
8085         {
8086                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8087                 .doit = nl80211_update_mesh_config,
8088                 .policy = nl80211_policy,
8089                 .flags = GENL_ADMIN_PERM,
8090                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8091                                   NL80211_FLAG_NEED_RTNL,
8092         },
8093         {
8094                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8095                 .doit = nl80211_trigger_scan,
8096                 .policy = nl80211_policy,
8097                 .flags = GENL_ADMIN_PERM,
8098                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8099                                   NL80211_FLAG_NEED_RTNL,
8100         },
8101         {
8102                 .cmd = NL80211_CMD_GET_SCAN,
8103                 .policy = nl80211_policy,
8104                 .dumpit = nl80211_dump_scan,
8105         },
8106         {
8107                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8108                 .doit = nl80211_start_sched_scan,
8109                 .policy = nl80211_policy,
8110                 .flags = GENL_ADMIN_PERM,
8111                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8112                                   NL80211_FLAG_NEED_RTNL,
8113         },
8114         {
8115                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8116                 .doit = nl80211_stop_sched_scan,
8117                 .policy = nl80211_policy,
8118                 .flags = GENL_ADMIN_PERM,
8119                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8120                                   NL80211_FLAG_NEED_RTNL,
8121         },
8122         {
8123                 .cmd = NL80211_CMD_AUTHENTICATE,
8124                 .doit = nl80211_authenticate,
8125                 .policy = nl80211_policy,
8126                 .flags = GENL_ADMIN_PERM,
8127                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8128                                   NL80211_FLAG_NEED_RTNL,
8129         },
8130         {
8131                 .cmd = NL80211_CMD_ASSOCIATE,
8132                 .doit = nl80211_associate,
8133                 .policy = nl80211_policy,
8134                 .flags = GENL_ADMIN_PERM,
8135                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8136                                   NL80211_FLAG_NEED_RTNL,
8137         },
8138         {
8139                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8140                 .doit = nl80211_deauthenticate,
8141                 .policy = nl80211_policy,
8142                 .flags = GENL_ADMIN_PERM,
8143                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8144                                   NL80211_FLAG_NEED_RTNL,
8145         },
8146         {
8147                 .cmd = NL80211_CMD_DISASSOCIATE,
8148                 .doit = nl80211_disassociate,
8149                 .policy = nl80211_policy,
8150                 .flags = GENL_ADMIN_PERM,
8151                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8152                                   NL80211_FLAG_NEED_RTNL,
8153         },
8154         {
8155                 .cmd = NL80211_CMD_JOIN_IBSS,
8156                 .doit = nl80211_join_ibss,
8157                 .policy = nl80211_policy,
8158                 .flags = GENL_ADMIN_PERM,
8159                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8160                                   NL80211_FLAG_NEED_RTNL,
8161         },
8162         {
8163                 .cmd = NL80211_CMD_LEAVE_IBSS,
8164                 .doit = nl80211_leave_ibss,
8165                 .policy = nl80211_policy,
8166                 .flags = GENL_ADMIN_PERM,
8167                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8168                                   NL80211_FLAG_NEED_RTNL,
8169         },
8170 #ifdef CONFIG_NL80211_TESTMODE
8171         {
8172                 .cmd = NL80211_CMD_TESTMODE,
8173                 .doit = nl80211_testmode_do,
8174                 .dumpit = nl80211_testmode_dump,
8175                 .policy = nl80211_policy,
8176                 .flags = GENL_ADMIN_PERM,
8177                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8178                                   NL80211_FLAG_NEED_RTNL,
8179         },
8180 #endif
8181         {
8182                 .cmd = NL80211_CMD_CONNECT,
8183                 .doit = nl80211_connect,
8184                 .policy = nl80211_policy,
8185                 .flags = GENL_ADMIN_PERM,
8186                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8187                                   NL80211_FLAG_NEED_RTNL,
8188         },
8189         {
8190                 .cmd = NL80211_CMD_DISCONNECT,
8191                 .doit = nl80211_disconnect,
8192                 .policy = nl80211_policy,
8193                 .flags = GENL_ADMIN_PERM,
8194                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8195                                   NL80211_FLAG_NEED_RTNL,
8196         },
8197         {
8198                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8199                 .doit = nl80211_wiphy_netns,
8200                 .policy = nl80211_policy,
8201                 .flags = GENL_ADMIN_PERM,
8202                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8203                                   NL80211_FLAG_NEED_RTNL,
8204         },
8205         {
8206                 .cmd = NL80211_CMD_GET_SURVEY,
8207                 .policy = nl80211_policy,
8208                 .dumpit = nl80211_dump_survey,
8209         },
8210         {
8211                 .cmd = NL80211_CMD_SET_PMKSA,
8212                 .doit = nl80211_setdel_pmksa,
8213                 .policy = nl80211_policy,
8214                 .flags = GENL_ADMIN_PERM,
8215                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8216                                   NL80211_FLAG_NEED_RTNL,
8217         },
8218         {
8219                 .cmd = NL80211_CMD_DEL_PMKSA,
8220                 .doit = nl80211_setdel_pmksa,
8221                 .policy = nl80211_policy,
8222                 .flags = GENL_ADMIN_PERM,
8223                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8224                                   NL80211_FLAG_NEED_RTNL,
8225         },
8226         {
8227                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8228                 .doit = nl80211_flush_pmksa,
8229                 .policy = nl80211_policy,
8230                 .flags = GENL_ADMIN_PERM,
8231                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8232                                   NL80211_FLAG_NEED_RTNL,
8233         },
8234         {
8235                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8236                 .doit = nl80211_remain_on_channel,
8237                 .policy = nl80211_policy,
8238                 .flags = GENL_ADMIN_PERM,
8239                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8240                                   NL80211_FLAG_NEED_RTNL,
8241         },
8242         {
8243                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8244                 .doit = nl80211_cancel_remain_on_channel,
8245                 .policy = nl80211_policy,
8246                 .flags = GENL_ADMIN_PERM,
8247                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8248                                   NL80211_FLAG_NEED_RTNL,
8249         },
8250         {
8251                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8252                 .doit = nl80211_set_tx_bitrate_mask,
8253                 .policy = nl80211_policy,
8254                 .flags = GENL_ADMIN_PERM,
8255                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8256                                   NL80211_FLAG_NEED_RTNL,
8257         },
8258         {
8259                 .cmd = NL80211_CMD_REGISTER_FRAME,
8260                 .doit = nl80211_register_mgmt,
8261                 .policy = nl80211_policy,
8262                 .flags = GENL_ADMIN_PERM,
8263                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8264                                   NL80211_FLAG_NEED_RTNL,
8265         },
8266         {
8267                 .cmd = NL80211_CMD_FRAME,
8268                 .doit = nl80211_tx_mgmt,
8269                 .policy = nl80211_policy,
8270                 .flags = GENL_ADMIN_PERM,
8271                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8272                                   NL80211_FLAG_NEED_RTNL,
8273         },
8274         {
8275                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8276                 .doit = nl80211_tx_mgmt_cancel_wait,
8277                 .policy = nl80211_policy,
8278                 .flags = GENL_ADMIN_PERM,
8279                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8280                                   NL80211_FLAG_NEED_RTNL,
8281         },
8282         {
8283                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8284                 .doit = nl80211_set_power_save,
8285                 .policy = nl80211_policy,
8286                 .flags = GENL_ADMIN_PERM,
8287                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8288                                   NL80211_FLAG_NEED_RTNL,
8289         },
8290         {
8291                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8292                 .doit = nl80211_get_power_save,
8293                 .policy = nl80211_policy,
8294                 /* can be retrieved by unprivileged users */
8295                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8296                                   NL80211_FLAG_NEED_RTNL,
8297         },
8298         {
8299                 .cmd = NL80211_CMD_SET_CQM,
8300                 .doit = nl80211_set_cqm,
8301                 .policy = nl80211_policy,
8302                 .flags = GENL_ADMIN_PERM,
8303                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8304                                   NL80211_FLAG_NEED_RTNL,
8305         },
8306         {
8307                 .cmd = NL80211_CMD_SET_CHANNEL,
8308                 .doit = nl80211_set_channel,
8309                 .policy = nl80211_policy,
8310                 .flags = GENL_ADMIN_PERM,
8311                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8312                                   NL80211_FLAG_NEED_RTNL,
8313         },
8314         {
8315                 .cmd = NL80211_CMD_SET_WDS_PEER,
8316                 .doit = nl80211_set_wds_peer,
8317                 .policy = nl80211_policy,
8318                 .flags = GENL_ADMIN_PERM,
8319                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8320                                   NL80211_FLAG_NEED_RTNL,
8321         },
8322         {
8323                 .cmd = NL80211_CMD_JOIN_MESH,
8324                 .doit = nl80211_join_mesh,
8325                 .policy = nl80211_policy,
8326                 .flags = GENL_ADMIN_PERM,
8327                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8328                                   NL80211_FLAG_NEED_RTNL,
8329         },
8330         {
8331                 .cmd = NL80211_CMD_LEAVE_MESH,
8332                 .doit = nl80211_leave_mesh,
8333                 .policy = nl80211_policy,
8334                 .flags = GENL_ADMIN_PERM,
8335                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8336                                   NL80211_FLAG_NEED_RTNL,
8337         },
8338 #ifdef CONFIG_PM
8339         {
8340                 .cmd = NL80211_CMD_GET_WOWLAN,
8341                 .doit = nl80211_get_wowlan,
8342                 .policy = nl80211_policy,
8343                 /* can be retrieved by unprivileged users */
8344                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8345                                   NL80211_FLAG_NEED_RTNL,
8346         },
8347         {
8348                 .cmd = NL80211_CMD_SET_WOWLAN,
8349                 .doit = nl80211_set_wowlan,
8350                 .policy = nl80211_policy,
8351                 .flags = GENL_ADMIN_PERM,
8352                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8353                                   NL80211_FLAG_NEED_RTNL,
8354         },
8355 #endif
8356         {
8357                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8358                 .doit = nl80211_set_rekey_data,
8359                 .policy = nl80211_policy,
8360                 .flags = GENL_ADMIN_PERM,
8361                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8362                                   NL80211_FLAG_NEED_RTNL,
8363         },
8364         {
8365                 .cmd = NL80211_CMD_TDLS_MGMT,
8366                 .doit = nl80211_tdls_mgmt,
8367                 .policy = nl80211_policy,
8368                 .flags = GENL_ADMIN_PERM,
8369                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8370                                   NL80211_FLAG_NEED_RTNL,
8371         },
8372         {
8373                 .cmd = NL80211_CMD_TDLS_OPER,
8374                 .doit = nl80211_tdls_oper,
8375                 .policy = nl80211_policy,
8376                 .flags = GENL_ADMIN_PERM,
8377                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8378                                   NL80211_FLAG_NEED_RTNL,
8379         },
8380         {
8381                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8382                 .doit = nl80211_register_unexpected_frame,
8383                 .policy = nl80211_policy,
8384                 .flags = GENL_ADMIN_PERM,
8385                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8386                                   NL80211_FLAG_NEED_RTNL,
8387         },
8388         {
8389                 .cmd = NL80211_CMD_PROBE_CLIENT,
8390                 .doit = nl80211_probe_client,
8391                 .policy = nl80211_policy,
8392                 .flags = GENL_ADMIN_PERM,
8393                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8394                                   NL80211_FLAG_NEED_RTNL,
8395         },
8396         {
8397                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8398                 .doit = nl80211_register_beacons,
8399                 .policy = nl80211_policy,
8400                 .flags = GENL_ADMIN_PERM,
8401                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8402                                   NL80211_FLAG_NEED_RTNL,
8403         },
8404         {
8405                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8406                 .doit = nl80211_set_noack_map,
8407                 .policy = nl80211_policy,
8408                 .flags = GENL_ADMIN_PERM,
8409                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8410                                   NL80211_FLAG_NEED_RTNL,
8411         },
8412         {
8413                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8414                 .doit = nl80211_start_p2p_device,
8415                 .policy = nl80211_policy,
8416                 .flags = GENL_ADMIN_PERM,
8417                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8418                                   NL80211_FLAG_NEED_RTNL,
8419         },
8420         {
8421                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8422                 .doit = nl80211_stop_p2p_device,
8423                 .policy = nl80211_policy,
8424                 .flags = GENL_ADMIN_PERM,
8425                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8426                                   NL80211_FLAG_NEED_RTNL,
8427         },
8428         {
8429                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8430                 .doit = nl80211_set_mcast_rate,
8431                 .policy = nl80211_policy,
8432                 .flags = GENL_ADMIN_PERM,
8433                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8434                                   NL80211_FLAG_NEED_RTNL,
8435         },
8436         {
8437                 .cmd = NL80211_CMD_SET_MAC_ACL,
8438                 .doit = nl80211_set_mac_acl,
8439                 .policy = nl80211_policy,
8440                 .flags = GENL_ADMIN_PERM,
8441                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8442                                   NL80211_FLAG_NEED_RTNL,
8443         },
8444         {
8445                 .cmd = NL80211_CMD_RADAR_DETECT,
8446                 .doit = nl80211_start_radar_detection,
8447                 .policy = nl80211_policy,
8448                 .flags = GENL_ADMIN_PERM,
8449                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8450                                   NL80211_FLAG_NEED_RTNL,
8451         },
8452 };
8453
8454 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8455         .name = "mlme",
8456 };
8457
8458 /* multicast groups */
8459 static struct genl_multicast_group nl80211_config_mcgrp = {
8460         .name = "config",
8461 };
8462 static struct genl_multicast_group nl80211_scan_mcgrp = {
8463         .name = "scan",
8464 };
8465 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8466         .name = "regulatory",
8467 };
8468
8469 /* notification functions */
8470
8471 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8472 {
8473         struct sk_buff *msg;
8474
8475         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8476         if (!msg)
8477                 return;
8478
8479         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
8480                 nlmsg_free(msg);
8481                 return;
8482         }
8483
8484         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8485                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8486 }
8487
8488 static int nl80211_add_scan_req(struct sk_buff *msg,
8489                                 struct cfg80211_registered_device *rdev)
8490 {
8491         struct cfg80211_scan_request *req = rdev->scan_req;
8492         struct nlattr *nest;
8493         int i;
8494
8495         ASSERT_RDEV_LOCK(rdev);
8496
8497         if (WARN_ON(!req))
8498                 return 0;
8499
8500         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8501         if (!nest)
8502                 goto nla_put_failure;
8503         for (i = 0; i < req->n_ssids; i++) {
8504                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8505                         goto nla_put_failure;
8506         }
8507         nla_nest_end(msg, nest);
8508
8509         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8510         if (!nest)
8511                 goto nla_put_failure;
8512         for (i = 0; i < req->n_channels; i++) {
8513                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8514                         goto nla_put_failure;
8515         }
8516         nla_nest_end(msg, nest);
8517
8518         if (req->ie &&
8519             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8520                 goto nla_put_failure;
8521
8522         if (req->flags)
8523                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8524
8525         return 0;
8526  nla_put_failure:
8527         return -ENOBUFS;
8528 }
8529
8530 static int nl80211_send_scan_msg(struct sk_buff *msg,
8531                                  struct cfg80211_registered_device *rdev,
8532                                  struct wireless_dev *wdev,
8533                                  u32 portid, u32 seq, int flags,
8534                                  u32 cmd)
8535 {
8536         void *hdr;
8537
8538         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8539         if (!hdr)
8540                 return -1;
8541
8542         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8543             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8544                                          wdev->netdev->ifindex)) ||
8545             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8546                 goto nla_put_failure;
8547
8548         /* ignore errors and send incomplete event anyway */
8549         nl80211_add_scan_req(msg, rdev);
8550
8551         return genlmsg_end(msg, hdr);
8552
8553  nla_put_failure:
8554         genlmsg_cancel(msg, hdr);
8555         return -EMSGSIZE;
8556 }
8557
8558 static int
8559 nl80211_send_sched_scan_msg(struct sk_buff *msg,
8560                             struct cfg80211_registered_device *rdev,
8561                             struct net_device *netdev,
8562                             u32 portid, u32 seq, int flags, u32 cmd)
8563 {
8564         void *hdr;
8565
8566         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8567         if (!hdr)
8568                 return -1;
8569
8570         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8571             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8572                 goto nla_put_failure;
8573
8574         return genlmsg_end(msg, hdr);
8575
8576  nla_put_failure:
8577         genlmsg_cancel(msg, hdr);
8578         return -EMSGSIZE;
8579 }
8580
8581 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
8582                              struct wireless_dev *wdev)
8583 {
8584         struct sk_buff *msg;
8585
8586         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8587         if (!msg)
8588                 return;
8589
8590         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8591                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
8592                 nlmsg_free(msg);
8593                 return;
8594         }
8595
8596         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8597                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8598 }
8599
8600 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
8601                             struct wireless_dev *wdev)
8602 {
8603         struct sk_buff *msg;
8604
8605         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8606         if (!msg)
8607                 return;
8608
8609         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8610                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
8611                 nlmsg_free(msg);
8612                 return;
8613         }
8614
8615         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8616                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8617 }
8618
8619 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
8620                                struct wireless_dev *wdev)
8621 {
8622         struct sk_buff *msg;
8623
8624         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8625         if (!msg)
8626                 return;
8627
8628         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8629                                   NL80211_CMD_SCAN_ABORTED) < 0) {
8630                 nlmsg_free(msg);
8631                 return;
8632         }
8633
8634         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8635                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8636 }
8637
8638 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
8639                                      struct net_device *netdev)
8640 {
8641         struct sk_buff *msg;
8642
8643         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8644         if (!msg)
8645                 return;
8646
8647         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
8648                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
8649                 nlmsg_free(msg);
8650                 return;
8651         }
8652
8653         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8654                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8655 }
8656
8657 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
8658                              struct net_device *netdev, u32 cmd)
8659 {
8660         struct sk_buff *msg;
8661
8662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8663         if (!msg)
8664                 return;
8665
8666         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
8667                 nlmsg_free(msg);
8668                 return;
8669         }
8670
8671         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8672                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8673 }
8674
8675 /*
8676  * This can happen on global regulatory changes or device specific settings
8677  * based on custom world regulatory domains.
8678  */
8679 void nl80211_send_reg_change_event(struct regulatory_request *request)
8680 {
8681         struct sk_buff *msg;
8682         void *hdr;
8683
8684         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8685         if (!msg)
8686                 return;
8687
8688         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8689         if (!hdr) {
8690                 nlmsg_free(msg);
8691                 return;
8692         }
8693
8694         /* Userspace can always count this one always being set */
8695         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8696                 goto nla_put_failure;
8697
8698         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8699                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8700                                NL80211_REGDOM_TYPE_WORLD))
8701                         goto nla_put_failure;
8702         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8703                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8704                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8705                         goto nla_put_failure;
8706         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8707                    request->intersect) {
8708                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8709                                NL80211_REGDOM_TYPE_INTERSECTION))
8710                         goto nla_put_failure;
8711         } else {
8712                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8713                                NL80211_REGDOM_TYPE_COUNTRY) ||
8714                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8715                                    request->alpha2))
8716                         goto nla_put_failure;
8717         }
8718
8719         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
8720             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8721                 goto nla_put_failure;
8722
8723         genlmsg_end(msg, hdr);
8724
8725         rcu_read_lock();
8726         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8727                                 GFP_ATOMIC);
8728         rcu_read_unlock();
8729
8730         return;
8731
8732 nla_put_failure:
8733         genlmsg_cancel(msg, hdr);
8734         nlmsg_free(msg);
8735 }
8736
8737 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8738                                     struct net_device *netdev,
8739                                     const u8 *buf, size_t len,
8740                                     enum nl80211_commands cmd, gfp_t gfp)
8741 {
8742         struct sk_buff *msg;
8743         void *hdr;
8744
8745         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8746         if (!msg)
8747                 return;
8748
8749         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8750         if (!hdr) {
8751                 nlmsg_free(msg);
8752                 return;
8753         }
8754
8755         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8756             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8757             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8758                 goto nla_put_failure;
8759
8760         genlmsg_end(msg, hdr);
8761
8762         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8763                                 nl80211_mlme_mcgrp.id, gfp);
8764         return;
8765
8766  nla_put_failure:
8767         genlmsg_cancel(msg, hdr);
8768         nlmsg_free(msg);
8769 }
8770
8771 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8772                           struct net_device *netdev, const u8 *buf,
8773                           size_t len, gfp_t gfp)
8774 {
8775         nl80211_send_mlme_event(rdev, netdev, buf, len,
8776                                 NL80211_CMD_AUTHENTICATE, gfp);
8777 }
8778
8779 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8780                            struct net_device *netdev, const u8 *buf,
8781                            size_t len, gfp_t gfp)
8782 {
8783         nl80211_send_mlme_event(rdev, netdev, buf, len,
8784                                 NL80211_CMD_ASSOCIATE, gfp);
8785 }
8786
8787 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8788                          struct net_device *netdev, const u8 *buf,
8789                          size_t len, gfp_t gfp)
8790 {
8791         nl80211_send_mlme_event(rdev, netdev, buf, len,
8792                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8793 }
8794
8795 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8796                            struct net_device *netdev, const u8 *buf,
8797                            size_t len, gfp_t gfp)
8798 {
8799         nl80211_send_mlme_event(rdev, netdev, buf, len,
8800                                 NL80211_CMD_DISASSOCIATE, gfp);
8801 }
8802
8803 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8804                                 struct net_device *netdev, const u8 *buf,
8805                                 size_t len, gfp_t gfp)
8806 {
8807         nl80211_send_mlme_event(rdev, netdev, buf, len,
8808                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8809 }
8810
8811 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8812                                   struct net_device *netdev, const u8 *buf,
8813                                   size_t len, gfp_t gfp)
8814 {
8815         nl80211_send_mlme_event(rdev, netdev, buf, len,
8816                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8817 }
8818
8819 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8820                                       struct net_device *netdev, int cmd,
8821                                       const u8 *addr, gfp_t gfp)
8822 {
8823         struct sk_buff *msg;
8824         void *hdr;
8825
8826         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8827         if (!msg)
8828                 return;
8829
8830         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8831         if (!hdr) {
8832                 nlmsg_free(msg);
8833                 return;
8834         }
8835
8836         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8837             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8838             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8839             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8840                 goto nla_put_failure;
8841
8842         genlmsg_end(msg, hdr);
8843
8844         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8845                                 nl80211_mlme_mcgrp.id, gfp);
8846         return;
8847
8848  nla_put_failure:
8849         genlmsg_cancel(msg, hdr);
8850         nlmsg_free(msg);
8851 }
8852
8853 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8854                                struct net_device *netdev, const u8 *addr,
8855                                gfp_t gfp)
8856 {
8857         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8858                                   addr, gfp);
8859 }
8860
8861 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8862                                 struct net_device *netdev, const u8 *addr,
8863                                 gfp_t gfp)
8864 {
8865         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8866                                   addr, gfp);
8867 }
8868
8869 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8870                                  struct net_device *netdev, const u8 *bssid,
8871                                  const u8 *req_ie, size_t req_ie_len,
8872                                  const u8 *resp_ie, size_t resp_ie_len,
8873                                  u16 status, gfp_t gfp)
8874 {
8875         struct sk_buff *msg;
8876         void *hdr;
8877
8878         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8879         if (!msg)
8880                 return;
8881
8882         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8883         if (!hdr) {
8884                 nlmsg_free(msg);
8885                 return;
8886         }
8887
8888         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8889             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8890             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8891             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8892             (req_ie &&
8893              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8894             (resp_ie &&
8895              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8896                 goto nla_put_failure;
8897
8898         genlmsg_end(msg, hdr);
8899
8900         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8901                                 nl80211_mlme_mcgrp.id, gfp);
8902         return;
8903
8904  nla_put_failure:
8905         genlmsg_cancel(msg, hdr);
8906         nlmsg_free(msg);
8907
8908 }
8909
8910 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8911                          struct net_device *netdev, const u8 *bssid,
8912                          const u8 *req_ie, size_t req_ie_len,
8913                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8914 {
8915         struct sk_buff *msg;
8916         void *hdr;
8917
8918         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8919         if (!msg)
8920                 return;
8921
8922         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8923         if (!hdr) {
8924                 nlmsg_free(msg);
8925                 return;
8926         }
8927
8928         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8929             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8930             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8931             (req_ie &&
8932              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8933             (resp_ie &&
8934              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8935                 goto nla_put_failure;
8936
8937         genlmsg_end(msg, hdr);
8938
8939         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8940                                 nl80211_mlme_mcgrp.id, gfp);
8941         return;
8942
8943  nla_put_failure:
8944         genlmsg_cancel(msg, hdr);
8945         nlmsg_free(msg);
8946
8947 }
8948
8949 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8950                                struct net_device *netdev, u16 reason,
8951                                const u8 *ie, size_t ie_len, bool from_ap)
8952 {
8953         struct sk_buff *msg;
8954         void *hdr;
8955
8956         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8957         if (!msg)
8958                 return;
8959
8960         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8961         if (!hdr) {
8962                 nlmsg_free(msg);
8963                 return;
8964         }
8965
8966         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8967             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8968             (from_ap && reason &&
8969              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8970             (from_ap &&
8971              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8972             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8973                 goto nla_put_failure;
8974
8975         genlmsg_end(msg, hdr);
8976
8977         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8978                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8979         return;
8980
8981  nla_put_failure:
8982         genlmsg_cancel(msg, hdr);
8983         nlmsg_free(msg);
8984
8985 }
8986
8987 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8988                              struct net_device *netdev, const u8 *bssid,
8989                              gfp_t gfp)
8990 {
8991         struct sk_buff *msg;
8992         void *hdr;
8993
8994         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8995         if (!msg)
8996                 return;
8997
8998         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8999         if (!hdr) {
9000                 nlmsg_free(msg);
9001                 return;
9002         }
9003
9004         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9005             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9006             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9007                 goto nla_put_failure;
9008
9009         genlmsg_end(msg, hdr);
9010
9011         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9012                                 nl80211_mlme_mcgrp.id, gfp);
9013         return;
9014
9015  nla_put_failure:
9016         genlmsg_cancel(msg, hdr);
9017         nlmsg_free(msg);
9018 }
9019
9020 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
9021                 struct net_device *netdev,
9022                 const u8 *macaddr, const u8* ie, u8 ie_len,
9023                 gfp_t gfp)
9024 {
9025         struct sk_buff *msg;
9026         void *hdr;
9027
9028         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9029         if (!msg)
9030                 return;
9031
9032         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9033         if (!hdr) {
9034                 nlmsg_free(msg);
9035                 return;
9036         }
9037
9038         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9039             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9040             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
9041             (ie_len && ie &&
9042              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9043                 goto nla_put_failure;
9044
9045         genlmsg_end(msg, hdr);
9046
9047         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9048                                 nl80211_mlme_mcgrp.id, gfp);
9049         return;
9050
9051  nla_put_failure:
9052         genlmsg_cancel(msg, hdr);
9053         nlmsg_free(msg);
9054 }
9055
9056 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9057                                  struct net_device *netdev, const u8 *addr,
9058                                  enum nl80211_key_type key_type, int key_id,
9059                                  const u8 *tsc, gfp_t gfp)
9060 {
9061         struct sk_buff *msg;
9062         void *hdr;
9063
9064         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9065         if (!msg)
9066                 return;
9067
9068         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9069         if (!hdr) {
9070                 nlmsg_free(msg);
9071                 return;
9072         }
9073
9074         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9075             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9076             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9077             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9078             (key_id != -1 &&
9079              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9080             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9081                 goto nla_put_failure;
9082
9083         genlmsg_end(msg, hdr);
9084
9085         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9086                                 nl80211_mlme_mcgrp.id, gfp);
9087         return;
9088
9089  nla_put_failure:
9090         genlmsg_cancel(msg, hdr);
9091         nlmsg_free(msg);
9092 }
9093
9094 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9095                                     struct ieee80211_channel *channel_before,
9096                                     struct ieee80211_channel *channel_after)
9097 {
9098         struct sk_buff *msg;
9099         void *hdr;
9100         struct nlattr *nl_freq;
9101
9102         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9103         if (!msg)
9104                 return;
9105
9106         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9107         if (!hdr) {
9108                 nlmsg_free(msg);
9109                 return;
9110         }
9111
9112         /*
9113          * Since we are applying the beacon hint to a wiphy we know its
9114          * wiphy_idx is valid
9115          */
9116         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9117                 goto nla_put_failure;
9118
9119         /* Before */
9120         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9121         if (!nl_freq)
9122                 goto nla_put_failure;
9123         if (nl80211_msg_put_channel(msg, channel_before))
9124                 goto nla_put_failure;
9125         nla_nest_end(msg, nl_freq);
9126
9127         /* After */
9128         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9129         if (!nl_freq)
9130                 goto nla_put_failure;
9131         if (nl80211_msg_put_channel(msg, channel_after))
9132                 goto nla_put_failure;
9133         nla_nest_end(msg, nl_freq);
9134
9135         genlmsg_end(msg, hdr);
9136
9137         rcu_read_lock();
9138         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9139                                 GFP_ATOMIC);
9140         rcu_read_unlock();
9141
9142         return;
9143
9144 nla_put_failure:
9145         genlmsg_cancel(msg, hdr);
9146         nlmsg_free(msg);
9147 }
9148
9149 static void nl80211_send_remain_on_chan_event(
9150         int cmd, struct cfg80211_registered_device *rdev,
9151         struct wireless_dev *wdev, u64 cookie,
9152         struct ieee80211_channel *chan,
9153         unsigned int duration, gfp_t gfp)
9154 {
9155         struct sk_buff *msg;
9156         void *hdr;
9157
9158         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9159         if (!msg)
9160                 return;
9161
9162         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9163         if (!hdr) {
9164                 nlmsg_free(msg);
9165                 return;
9166         }
9167
9168         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9169             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9170                                          wdev->netdev->ifindex)) ||
9171             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9172             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9173             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9174                         NL80211_CHAN_NO_HT) ||
9175             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9176                 goto nla_put_failure;
9177
9178         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9179             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9180                 goto nla_put_failure;
9181
9182         genlmsg_end(msg, hdr);
9183
9184         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9185                                 nl80211_mlme_mcgrp.id, gfp);
9186         return;
9187
9188  nla_put_failure:
9189         genlmsg_cancel(msg, hdr);
9190         nlmsg_free(msg);
9191 }
9192
9193 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
9194                                     struct wireless_dev *wdev, u64 cookie,
9195                                     struct ieee80211_channel *chan,
9196                                     unsigned int duration, gfp_t gfp)
9197 {
9198         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9199                                           rdev, wdev, cookie, chan,
9200                                           duration, gfp);
9201 }
9202
9203 void nl80211_send_remain_on_channel_cancel(
9204         struct cfg80211_registered_device *rdev,
9205         struct wireless_dev *wdev,
9206         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
9207 {
9208         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9209                                           rdev, wdev, cookie, chan, 0, gfp);
9210 }
9211
9212 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
9213                             struct net_device *dev, const u8 *mac_addr,
9214                             struct station_info *sinfo, gfp_t gfp)
9215 {
9216         struct sk_buff *msg;
9217
9218         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9219         if (!msg)
9220                 return;
9221
9222         if (nl80211_send_station(msg, 0, 0, 0,
9223                                  rdev, dev, mac_addr, sinfo) < 0) {
9224                 nlmsg_free(msg);
9225                 return;
9226         }
9227
9228         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9229                                 nl80211_mlme_mcgrp.id, gfp);
9230 }
9231
9232 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
9233                                 struct net_device *dev, const u8 *mac_addr,
9234                                 gfp_t gfp)
9235 {
9236         struct sk_buff *msg;
9237         void *hdr;
9238
9239         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9240         if (!msg)
9241                 return;
9242
9243         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9244         if (!hdr) {
9245                 nlmsg_free(msg);
9246                 return;
9247         }
9248
9249         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9250             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9251                 goto nla_put_failure;
9252
9253         genlmsg_end(msg, hdr);
9254
9255         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9256                                 nl80211_mlme_mcgrp.id, gfp);
9257         return;
9258
9259  nla_put_failure:
9260         genlmsg_cancel(msg, hdr);
9261         nlmsg_free(msg);
9262 }
9263
9264 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
9265                                     struct net_device *dev, const u8 *mac_addr,
9266                                     enum nl80211_connect_failed_reason reason,
9267                                     gfp_t gfp)
9268 {
9269         struct sk_buff *msg;
9270         void *hdr;
9271
9272         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9273         if (!msg)
9274                 return;
9275
9276         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9277         if (!hdr) {
9278                 nlmsg_free(msg);
9279                 return;
9280         }
9281
9282         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9283             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9284             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9285                 goto nla_put_failure;
9286
9287         genlmsg_end(msg, hdr);
9288
9289         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9290                                 nl80211_mlme_mcgrp.id, gfp);
9291         return;
9292
9293  nla_put_failure:
9294         genlmsg_cancel(msg, hdr);
9295         nlmsg_free(msg);
9296 }
9297
9298 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9299                                        const u8 *addr, gfp_t gfp)
9300 {
9301         struct wireless_dev *wdev = dev->ieee80211_ptr;
9302         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9303         struct sk_buff *msg;
9304         void *hdr;
9305         int err;
9306         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9307
9308         if (!nlportid)
9309                 return false;
9310
9311         msg = nlmsg_new(100, gfp);
9312         if (!msg)
9313                 return true;
9314
9315         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9316         if (!hdr) {
9317                 nlmsg_free(msg);
9318                 return true;
9319         }
9320
9321         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9322             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9323             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9324                 goto nla_put_failure;
9325
9326         err = genlmsg_end(msg, hdr);
9327         if (err < 0) {
9328                 nlmsg_free(msg);
9329                 return true;
9330         }
9331
9332         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9333         return true;
9334
9335  nla_put_failure:
9336         genlmsg_cancel(msg, hdr);
9337         nlmsg_free(msg);
9338         return true;
9339 }
9340
9341 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
9342 {
9343         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9344                                           addr, gfp);
9345 }
9346
9347 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
9348                                     const u8 *addr, gfp_t gfp)
9349 {
9350         return __nl80211_unexpected_frame(dev,
9351                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9352                                           addr, gfp);
9353 }
9354
9355 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9356                       struct wireless_dev *wdev, u32 nlportid,
9357                       int freq, int sig_dbm,
9358                       const u8 *buf, size_t len, gfp_t gfp)
9359 {
9360         struct net_device *netdev = wdev->netdev;
9361         struct sk_buff *msg;
9362         void *hdr;
9363
9364         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9365         if (!msg)
9366                 return -ENOMEM;
9367
9368         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9369         if (!hdr) {
9370                 nlmsg_free(msg);
9371                 return -ENOMEM;
9372         }
9373
9374         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9375             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9376                                         netdev->ifindex)) ||
9377             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9378             (sig_dbm &&
9379              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9380             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9381                 goto nla_put_failure;
9382
9383         genlmsg_end(msg, hdr);
9384
9385         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9386
9387  nla_put_failure:
9388         genlmsg_cancel(msg, hdr);
9389         nlmsg_free(msg);
9390         return -ENOBUFS;
9391 }
9392
9393 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
9394                                  struct wireless_dev *wdev, u64 cookie,
9395                                  const u8 *buf, size_t len, bool ack,
9396                                  gfp_t gfp)
9397 {
9398         struct net_device *netdev = wdev->netdev;
9399         struct sk_buff *msg;
9400         void *hdr;
9401
9402         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9403         if (!msg)
9404                 return;
9405
9406         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9407         if (!hdr) {
9408                 nlmsg_free(msg);
9409                 return;
9410         }
9411
9412         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9413             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9414                                    netdev->ifindex)) ||
9415             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9416             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9417             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9418                 goto nla_put_failure;
9419
9420         genlmsg_end(msg, hdr);
9421
9422         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9423         return;
9424
9425  nla_put_failure:
9426         genlmsg_cancel(msg, hdr);
9427         nlmsg_free(msg);
9428 }
9429
9430 void
9431 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
9432                              struct net_device *netdev,
9433                              enum nl80211_cqm_rssi_threshold_event rssi_event,
9434                              gfp_t gfp)
9435 {
9436         struct sk_buff *msg;
9437         struct nlattr *pinfoattr;
9438         void *hdr;
9439
9440         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9441         if (!msg)
9442                 return;
9443
9444         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9445         if (!hdr) {
9446                 nlmsg_free(msg);
9447                 return;
9448         }
9449
9450         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9451             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9452                 goto nla_put_failure;
9453
9454         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9455         if (!pinfoattr)
9456                 goto nla_put_failure;
9457
9458         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9459                         rssi_event))
9460                 goto nla_put_failure;
9461
9462         nla_nest_end(msg, pinfoattr);
9463
9464         genlmsg_end(msg, hdr);
9465
9466         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9467                                 nl80211_mlme_mcgrp.id, gfp);
9468         return;
9469
9470  nla_put_failure:
9471         genlmsg_cancel(msg, hdr);
9472         nlmsg_free(msg);
9473 }
9474
9475 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9476                               struct net_device *netdev, const u8 *bssid,
9477                               const u8 *replay_ctr, gfp_t gfp)
9478 {
9479         struct sk_buff *msg;
9480         struct nlattr *rekey_attr;
9481         void *hdr;
9482
9483         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9484         if (!msg)
9485                 return;
9486
9487         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
9488         if (!hdr) {
9489                 nlmsg_free(msg);
9490                 return;
9491         }
9492
9493         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9494             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9495             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9496                 goto nla_put_failure;
9497
9498         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
9499         if (!rekey_attr)
9500                 goto nla_put_failure;
9501
9502         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
9503                     NL80211_REPLAY_CTR_LEN, replay_ctr))
9504                 goto nla_put_failure;
9505
9506         nla_nest_end(msg, rekey_attr);
9507
9508         genlmsg_end(msg, hdr);
9509
9510         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9511                                 nl80211_mlme_mcgrp.id, gfp);
9512         return;
9513
9514  nla_put_failure:
9515         genlmsg_cancel(msg, hdr);
9516         nlmsg_free(msg);
9517 }
9518
9519 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
9520                                     struct net_device *netdev, int index,
9521                                     const u8 *bssid, bool preauth, gfp_t gfp)
9522 {
9523         struct sk_buff *msg;
9524         struct nlattr *attr;
9525         void *hdr;
9526
9527         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9528         if (!msg)
9529                 return;
9530
9531         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
9532         if (!hdr) {
9533                 nlmsg_free(msg);
9534                 return;
9535         }
9536
9537         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9538             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9539                 goto nla_put_failure;
9540
9541         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
9542         if (!attr)
9543                 goto nla_put_failure;
9544
9545         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
9546             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
9547             (preauth &&
9548              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
9549                 goto nla_put_failure;
9550
9551         nla_nest_end(msg, attr);
9552
9553         genlmsg_end(msg, hdr);
9554
9555         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9556                                 nl80211_mlme_mcgrp.id, gfp);
9557         return;
9558
9559  nla_put_failure:
9560         genlmsg_cancel(msg, hdr);
9561         nlmsg_free(msg);
9562 }
9563
9564 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
9565                               struct net_device *netdev,
9566                               struct cfg80211_chan_def *chandef, gfp_t gfp)
9567 {
9568         struct sk_buff *msg;
9569         void *hdr;
9570
9571         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9572         if (!msg)
9573                 return;
9574
9575         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
9576         if (!hdr) {
9577                 nlmsg_free(msg);
9578                 return;
9579         }
9580
9581         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9582                 goto nla_put_failure;
9583
9584         if (nl80211_send_chandef(msg, chandef))
9585                 goto nla_put_failure;
9586
9587         genlmsg_end(msg, hdr);
9588
9589         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9590                                 nl80211_mlme_mcgrp.id, gfp);
9591         return;
9592
9593  nla_put_failure:
9594         genlmsg_cancel(msg, hdr);
9595         nlmsg_free(msg);
9596 }
9597
9598 void
9599 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
9600                             struct net_device *netdev, const u8 *peer,
9601                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
9602 {
9603         struct sk_buff *msg;
9604         struct nlattr *pinfoattr;
9605         void *hdr;
9606
9607         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9608         if (!msg)
9609                 return;
9610
9611         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9612         if (!hdr) {
9613                 nlmsg_free(msg);
9614                 return;
9615         }
9616
9617         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9618             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9619             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9620                 goto nla_put_failure;
9621
9622         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9623         if (!pinfoattr)
9624                 goto nla_put_failure;
9625
9626         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
9627                 goto nla_put_failure;
9628
9629         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
9630                 goto nla_put_failure;
9631
9632         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
9633                 goto nla_put_failure;
9634
9635         nla_nest_end(msg, pinfoattr);
9636
9637         genlmsg_end(msg, hdr);
9638
9639         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9640                                 nl80211_mlme_mcgrp.id, gfp);
9641         return;
9642
9643  nla_put_failure:
9644         genlmsg_cancel(msg, hdr);
9645         nlmsg_free(msg);
9646 }
9647
9648 void
9649 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
9650                      struct cfg80211_chan_def *chandef,
9651                      enum nl80211_radar_event event,
9652                      struct net_device *netdev, gfp_t gfp)
9653 {
9654         struct sk_buff *msg;
9655         void *hdr;
9656
9657         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9658         if (!msg)
9659                 return;
9660
9661         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
9662         if (!hdr) {
9663                 nlmsg_free(msg);
9664                 return;
9665         }
9666
9667         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
9668                 goto nla_put_failure;
9669
9670         /* NOP and radar events don't need a netdev parameter */
9671         if (netdev) {
9672                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
9673
9674                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9675                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9676                         goto nla_put_failure;
9677         }
9678
9679         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
9680                 goto nla_put_failure;
9681
9682         if (nl80211_send_chandef(msg, chandef))
9683                 goto nla_put_failure;
9684
9685         if (genlmsg_end(msg, hdr) < 0) {
9686                 nlmsg_free(msg);
9687                 return;
9688         }
9689
9690         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9691                                 nl80211_mlme_mcgrp.id, gfp);
9692         return;
9693
9694  nla_put_failure:
9695         genlmsg_cancel(msg, hdr);
9696         nlmsg_free(msg);
9697 }
9698
9699 void
9700 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
9701                                 struct net_device *netdev, const u8 *peer,
9702                                 u32 num_packets, gfp_t gfp)
9703 {
9704         struct sk_buff *msg;
9705         struct nlattr *pinfoattr;
9706         void *hdr;
9707
9708         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9709         if (!msg)
9710                 return;
9711
9712         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9713         if (!hdr) {
9714                 nlmsg_free(msg);
9715                 return;
9716         }
9717
9718         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9719             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9720             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9721                 goto nla_put_failure;
9722
9723         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9724         if (!pinfoattr)
9725                 goto nla_put_failure;
9726
9727         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9728                 goto nla_put_failure;
9729
9730         nla_nest_end(msg, pinfoattr);
9731
9732         genlmsg_end(msg, hdr);
9733
9734         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9735                                 nl80211_mlme_mcgrp.id, gfp);
9736         return;
9737
9738  nla_put_failure:
9739         genlmsg_cancel(msg, hdr);
9740         nlmsg_free(msg);
9741 }
9742
9743 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9744                            u64 cookie, bool acked, gfp_t gfp)
9745 {
9746         struct wireless_dev *wdev = dev->ieee80211_ptr;
9747         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9748         struct sk_buff *msg;
9749         void *hdr;
9750         int err;
9751
9752         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9753
9754         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9755
9756         if (!msg)
9757                 return;
9758
9759         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9760         if (!hdr) {
9761                 nlmsg_free(msg);
9762                 return;
9763         }
9764
9765         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9766             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9767             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9768             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9769             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9770                 goto nla_put_failure;
9771
9772         err = genlmsg_end(msg, hdr);
9773         if (err < 0) {
9774                 nlmsg_free(msg);
9775                 return;
9776         }
9777
9778         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9779                                 nl80211_mlme_mcgrp.id, gfp);
9780         return;
9781
9782  nla_put_failure:
9783         genlmsg_cancel(msg, hdr);
9784         nlmsg_free(msg);
9785 }
9786 EXPORT_SYMBOL(cfg80211_probe_status);
9787
9788 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9789                                  const u8 *frame, size_t len,
9790                                  int freq, int sig_dbm)
9791 {
9792         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9793         struct sk_buff *msg;
9794         void *hdr;
9795         struct cfg80211_beacon_registration *reg;
9796
9797         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9798
9799         spin_lock_bh(&rdev->beacon_registrations_lock);
9800         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9801                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9802                 if (!msg) {
9803                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9804                         return;
9805                 }
9806
9807                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9808                 if (!hdr)
9809                         goto nla_put_failure;
9810
9811                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9812                     (freq &&
9813                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9814                     (sig_dbm &&
9815                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9816                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9817                         goto nla_put_failure;
9818
9819                 genlmsg_end(msg, hdr);
9820
9821                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9822         }
9823         spin_unlock_bh(&rdev->beacon_registrations_lock);
9824         return;
9825
9826  nla_put_failure:
9827         spin_unlock_bh(&rdev->beacon_registrations_lock);
9828         if (hdr)
9829                 genlmsg_cancel(msg, hdr);
9830         nlmsg_free(msg);
9831 }
9832 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9833
9834 #ifdef CONFIG_PM
9835 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
9836                                    struct cfg80211_wowlan_wakeup *wakeup,
9837                                    gfp_t gfp)
9838 {
9839         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9840         struct sk_buff *msg;
9841         void *hdr;
9842         int err, size = 200;
9843
9844         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
9845
9846         if (wakeup)
9847                 size += wakeup->packet_present_len;
9848
9849         msg = nlmsg_new(size, gfp);
9850         if (!msg)
9851                 return;
9852
9853         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
9854         if (!hdr)
9855                 goto free_msg;
9856
9857         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9858             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9859                 goto free_msg;
9860
9861         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9862                                         wdev->netdev->ifindex))
9863                 goto free_msg;
9864
9865         if (wakeup) {
9866                 struct nlattr *reasons;
9867
9868                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9869
9870                 if (wakeup->disconnect &&
9871                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
9872                         goto free_msg;
9873                 if (wakeup->magic_pkt &&
9874                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
9875                         goto free_msg;
9876                 if (wakeup->gtk_rekey_failure &&
9877                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
9878                         goto free_msg;
9879                 if (wakeup->eap_identity_req &&
9880                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
9881                         goto free_msg;
9882                 if (wakeup->four_way_handshake &&
9883                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
9884                         goto free_msg;
9885                 if (wakeup->rfkill_release &&
9886                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
9887                         goto free_msg;
9888
9889                 if (wakeup->pattern_idx >= 0 &&
9890                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
9891                                 wakeup->pattern_idx))
9892                         goto free_msg;
9893
9894                 if (wakeup->tcp_match)
9895                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
9896
9897                 if (wakeup->tcp_connlost)
9898                         nla_put_flag(msg,
9899                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
9900
9901                 if (wakeup->tcp_nomoretokens)
9902                         nla_put_flag(msg,
9903                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
9904
9905                 if (wakeup->packet) {
9906                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
9907                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
9908
9909                         if (!wakeup->packet_80211) {
9910                                 pkt_attr =
9911                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
9912                                 len_attr =
9913                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
9914                         }
9915
9916                         if (wakeup->packet_len &&
9917                             nla_put_u32(msg, len_attr, wakeup->packet_len))
9918                                 goto free_msg;
9919
9920                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
9921                                     wakeup->packet))
9922                                 goto free_msg;
9923                 }
9924
9925                 nla_nest_end(msg, reasons);
9926         }
9927
9928         err = genlmsg_end(msg, hdr);
9929         if (err < 0)
9930                 goto free_msg;
9931
9932         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9933                                 nl80211_mlme_mcgrp.id, gfp);
9934         return;
9935
9936  free_msg:
9937         nlmsg_free(msg);
9938 }
9939 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
9940 #endif
9941
9942 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9943                                 enum nl80211_tdls_operation oper,
9944                                 u16 reason_code, gfp_t gfp)
9945 {
9946         struct wireless_dev *wdev = dev->ieee80211_ptr;
9947         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9948         struct sk_buff *msg;
9949         void *hdr;
9950         int err;
9951
9952         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9953                                          reason_code);
9954
9955         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9956         if (!msg)
9957                 return;
9958
9959         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9960         if (!hdr) {
9961                 nlmsg_free(msg);
9962                 return;
9963         }
9964
9965         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9966             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9967             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9968             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9969             (reason_code > 0 &&
9970              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9971                 goto nla_put_failure;
9972
9973         err = genlmsg_end(msg, hdr);
9974         if (err < 0) {
9975                 nlmsg_free(msg);
9976                 return;
9977         }
9978
9979         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9980                                 nl80211_mlme_mcgrp.id, gfp);
9981         return;
9982
9983  nla_put_failure:
9984         genlmsg_cancel(msg, hdr);
9985         nlmsg_free(msg);
9986 }
9987 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9988
9989 static int nl80211_netlink_notify(struct notifier_block * nb,
9990                                   unsigned long state,
9991                                   void *_notify)
9992 {
9993         struct netlink_notify *notify = _notify;
9994         struct cfg80211_registered_device *rdev;
9995         struct wireless_dev *wdev;
9996         struct cfg80211_beacon_registration *reg, *tmp;
9997
9998         if (state != NETLINK_URELEASE)
9999                 return NOTIFY_DONE;
10000
10001         rcu_read_lock();
10002
10003         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10004                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10005                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10006
10007                 spin_lock_bh(&rdev->beacon_registrations_lock);
10008                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10009                                          list) {
10010                         if (reg->nlportid == notify->portid) {
10011                                 list_del(&reg->list);
10012                                 kfree(reg);
10013                                 break;
10014                         }
10015                 }
10016                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10017         }
10018
10019         rcu_read_unlock();
10020
10021         return NOTIFY_DONE;
10022 }
10023
10024 static struct notifier_block nl80211_netlink_notifier = {
10025         .notifier_call = nl80211_netlink_notify,
10026 };
10027
10028 /* initialisation/exit functions */
10029
10030 int nl80211_init(void)
10031 {
10032         int err;
10033
10034         err = genl_register_family_with_ops(&nl80211_fam,
10035                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10036         if (err)
10037                 return err;
10038
10039         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10040         if (err)
10041                 goto err_out;
10042
10043         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10044         if (err)
10045                 goto err_out;
10046
10047         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10048         if (err)
10049                 goto err_out;
10050
10051         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10052         if (err)
10053                 goto err_out;
10054
10055 #ifdef CONFIG_NL80211_TESTMODE
10056         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10057         if (err)
10058                 goto err_out;
10059 #endif
10060
10061         err = netlink_register_notifier(&nl80211_netlink_notifier);
10062         if (err)
10063                 goto err_out;
10064
10065         return 0;
10066  err_out:
10067         genl_unregister_family(&nl80211_fam);
10068         return err;
10069 }
10070
10071 void nl80211_exit(void)
10072 {
10073         netlink_unregister_notifier(&nl80211_netlink_notifier);
10074         genl_unregister_family(&nl80211_fam);
10075 }