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_set_station_tdls(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         /* Dummy STA entry gets updated once the peer capabilities are known */
3370         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3371                 params->ht_capa =
3372                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3373         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3374                 params->vht_capa =
3375                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3376
3377         /* parse WME attributes if present */
3378         if (!info->attrs[NL80211_ATTR_STA_WME])
3379                 return 0;
3380
3381         nla = info->attrs[NL80211_ATTR_STA_WME];
3382         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3383                                nl80211_sta_wme_policy);
3384         if (err)
3385                 return err;
3386
3387         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3388                 params->uapsd_queues = nla_get_u8(
3389                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3390         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3391                 return -EINVAL;
3392
3393         if (tb[NL80211_STA_WME_MAX_SP])
3394                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3395
3396         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3397                 return -EINVAL;
3398
3399         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3400
3401         return 0;
3402 }
3403
3404 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3405 {
3406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3407         int err;
3408         struct net_device *dev = info->user_ptr[1];
3409         struct station_parameters params;
3410         u8 *mac_addr = NULL;
3411
3412         memset(&params, 0, sizeof(params));
3413
3414         params.listen_interval = -1;
3415         params.plink_state = -1;
3416
3417         if (info->attrs[NL80211_ATTR_STA_AID])
3418                 return -EINVAL;
3419
3420         if (!info->attrs[NL80211_ATTR_MAC])
3421                 return -EINVAL;
3422
3423         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3424
3425         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3426                 params.supported_rates =
3427                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3428                 params.supported_rates_len =
3429                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3430         }
3431
3432         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3433                 params.capability =
3434                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3435                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3436         }
3437
3438         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3439                 params.ext_capab =
3440                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3441                 params.ext_capab_len =
3442                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3443         }
3444
3445         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3446                 return -EINVAL;
3447
3448         if (!rdev->ops->change_station)
3449                 return -EOPNOTSUPP;
3450
3451         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3452                 return -EINVAL;
3453
3454         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3455                 params.plink_action =
3456                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3457
3458         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3459                 params.plink_state =
3460                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3461
3462         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3463                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3464                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3465
3466                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3467                     pm > NL80211_MESH_POWER_MAX)
3468                         return -EINVAL;
3469
3470                 params.local_pm = pm;
3471         }
3472
3473         switch (dev->ieee80211_ptr->iftype) {
3474         case NL80211_IFTYPE_AP:
3475         case NL80211_IFTYPE_AP_VLAN:
3476         case NL80211_IFTYPE_P2P_GO:
3477                 /* disallow mesh-specific things */
3478                 if (params.plink_action)
3479                         return -EINVAL;
3480                 if (params.local_pm)
3481                         return -EINVAL;
3482
3483                 /* TDLS can't be set, ... */
3484                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3485                         return -EINVAL;
3486                 /*
3487                  * ... but don't bother the driver with it. This works around
3488                  * a hostapd/wpa_supplicant issue -- it always includes the
3489                  * TLDS_PEER flag in the mask even for AP mode.
3490                  */
3491                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3492
3493                 /* accept only the listed bits */
3494                 if (params.sta_flags_mask &
3495                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3496                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3497                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3498                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3499                                   BIT(NL80211_STA_FLAG_WME) |
3500                                   BIT(NL80211_STA_FLAG_MFP)))
3501                         return -EINVAL;
3502
3503                 /* but authenticated/associated only if driver handles it */
3504                 if (!(rdev->wiphy.features &
3505                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3506                     params.sta_flags_mask &
3507                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3508                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3509                         return -EINVAL;
3510
3511                 /* reject other things that can't change */
3512                 if (params.supported_rates)
3513                         return -EINVAL;
3514                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3515                         return -EINVAL;
3516                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3517                         return -EINVAL;
3518                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3519                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3520                         return -EINVAL;
3521
3522                 /* must be last in here for error handling */
3523                 params.vlan = get_vlan(info, rdev);
3524                 if (IS_ERR(params.vlan))
3525                         return PTR_ERR(params.vlan);
3526                 break;
3527         case NL80211_IFTYPE_P2P_CLIENT:
3528         case NL80211_IFTYPE_STATION:
3529                 /*
3530                  * Don't allow userspace to change the TDLS_PEER flag,
3531                  * but silently ignore attempts to change it since we
3532                  * don't have state here to verify that it doesn't try
3533                  * to change the flag.
3534                  */
3535                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3536                 /* Include parameters for TDLS peer (driver will check) */
3537                 err = nl80211_set_station_tdls(info, &params);
3538                 if (err)
3539                         return err;
3540                 /* disallow things sta doesn't support */
3541                 if (params.plink_action)
3542                         return -EINVAL;
3543                 if (params.local_pm)
3544                         return -EINVAL;
3545                 /* reject any changes other than AUTHORIZED or WME (for TDLS) */
3546                 if (params.sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3547                                               BIT(NL80211_STA_FLAG_WME)))
3548                         return -EINVAL;
3549                 break;
3550         case NL80211_IFTYPE_ADHOC:
3551                 /* disallow things sta doesn't support */
3552                 if (params.plink_action)
3553                         return -EINVAL;
3554                 if (params.local_pm)
3555                         return -EINVAL;
3556                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3557                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3558                         return -EINVAL;
3559                 /* reject any changes other than AUTHORIZED */
3560                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3561                         return -EINVAL;
3562                 break;
3563         case NL80211_IFTYPE_MESH_POINT:
3564                 /* disallow things mesh doesn't support */
3565                 if (params.vlan)
3566                         return -EINVAL;
3567                 if (params.supported_rates)
3568                         return -EINVAL;
3569                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3570                         return -EINVAL;
3571                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3572                         return -EINVAL;
3573                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3574                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3575                         return -EINVAL;
3576                 /*
3577                  * No special handling for TDLS here -- the userspace
3578                  * mesh code doesn't have this bug.
3579                  */
3580                 if (params.sta_flags_mask &
3581                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3582                                   BIT(NL80211_STA_FLAG_MFP) |
3583                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3584                         return -EINVAL;
3585                 break;
3586         default:
3587                 return -EOPNOTSUPP;
3588         }
3589
3590         /* be aware of params.vlan when changing code here */
3591
3592         err = rdev_change_station(rdev, dev, mac_addr, &params);
3593
3594         if (params.vlan)
3595                 dev_put(params.vlan);
3596
3597         return err;
3598 }
3599
3600 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3601 {
3602         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3603         int err;
3604         struct net_device *dev = info->user_ptr[1];
3605         struct station_parameters params;
3606         u8 *mac_addr = NULL;
3607
3608         memset(&params, 0, sizeof(params));
3609
3610         if (!info->attrs[NL80211_ATTR_MAC])
3611                 return -EINVAL;
3612
3613         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3614                 return -EINVAL;
3615
3616         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3617                 return -EINVAL;
3618
3619         if (!info->attrs[NL80211_ATTR_STA_AID])
3620                 return -EINVAL;
3621
3622         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3623         params.supported_rates =
3624                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3625         params.supported_rates_len =
3626                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3627         params.listen_interval =
3628                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3629
3630         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3631         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3632                 return -EINVAL;
3633
3634         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3635                 params.capability =
3636                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3637                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3638         }
3639
3640         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3641                 params.ext_capab =
3642                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3643                 params.ext_capab_len =
3644                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3645         }
3646
3647         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3648                 params.ht_capa =
3649                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3650
3651         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3652                 params.vht_capa =
3653                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3654
3655         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3656                 params.plink_action =
3657                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3658
3659         if (!rdev->ops->add_station)
3660                 return -EOPNOTSUPP;
3661
3662         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3663                 return -EINVAL;
3664
3665         switch (dev->ieee80211_ptr->iftype) {
3666         case NL80211_IFTYPE_AP:
3667         case NL80211_IFTYPE_AP_VLAN:
3668         case NL80211_IFTYPE_P2P_GO:
3669                 /* parse WME attributes if sta is WME capable */
3670                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3671                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3672                     info->attrs[NL80211_ATTR_STA_WME]) {
3673                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3674                         struct nlattr *nla;
3675
3676                         nla = info->attrs[NL80211_ATTR_STA_WME];
3677                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3678                                                nl80211_sta_wme_policy);
3679                         if (err)
3680                                 return err;
3681
3682                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3683                                 params.uapsd_queues =
3684                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3685                         if (params.uapsd_queues &
3686                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3687                                 return -EINVAL;
3688
3689                         if (tb[NL80211_STA_WME_MAX_SP])
3690                                 params.max_sp =
3691                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3692
3693                         if (params.max_sp &
3694                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3695                                 return -EINVAL;
3696
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                 /* associated is disallowed */
3720                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3721                         return -EINVAL;
3722                 /* TDLS peers cannot be added */
3723                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3724                         return -EINVAL;
3725                 break;
3726         case NL80211_IFTYPE_STATION:
3727                 /* associated is disallowed */
3728                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3729                         return -EINVAL;
3730                 /* Only TDLS peers can be added */
3731                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3732                         return -EINVAL;
3733                 /* Can only add if TDLS ... */
3734                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3735                         return -EOPNOTSUPP;
3736                 /* ... with external setup is supported */
3737                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3738                         return -EOPNOTSUPP;
3739                 break;
3740         default:
3741                 return -EOPNOTSUPP;
3742         }
3743
3744         /* be aware of params.vlan when changing code here */
3745
3746         err = rdev_add_station(rdev, dev, mac_addr, &params);
3747
3748         if (params.vlan)
3749                 dev_put(params.vlan);
3750         return err;
3751 }
3752
3753 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3754 {
3755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3756         struct net_device *dev = info->user_ptr[1];
3757         u8 *mac_addr = NULL;
3758
3759         if (info->attrs[NL80211_ATTR_MAC])
3760                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3761
3762         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3763             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3764             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3765             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3766                 return -EINVAL;
3767
3768         if (!rdev->ops->del_station)
3769                 return -EOPNOTSUPP;
3770
3771         return rdev_del_station(rdev, dev, mac_addr);
3772 }
3773
3774 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3775                                 int flags, struct net_device *dev,
3776                                 u8 *dst, u8 *next_hop,
3777                                 struct mpath_info *pinfo)
3778 {
3779         void *hdr;
3780         struct nlattr *pinfoattr;
3781
3782         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3783         if (!hdr)
3784                 return -1;
3785
3786         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3787             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3788             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3789             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3790                 goto nla_put_failure;
3791
3792         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3793         if (!pinfoattr)
3794                 goto nla_put_failure;
3795         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3796             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3797                         pinfo->frame_qlen))
3798                 goto nla_put_failure;
3799         if (((pinfo->filled & MPATH_INFO_SN) &&
3800              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3801             ((pinfo->filled & MPATH_INFO_METRIC) &&
3802              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3803                          pinfo->metric)) ||
3804             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3805              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3806                          pinfo->exptime)) ||
3807             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3808              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3809                         pinfo->flags)) ||
3810             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3811              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3812                          pinfo->discovery_timeout)) ||
3813             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3814              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3815                         pinfo->discovery_retries)))
3816                 goto nla_put_failure;
3817
3818         nla_nest_end(msg, pinfoattr);
3819
3820         return genlmsg_end(msg, hdr);
3821
3822  nla_put_failure:
3823         genlmsg_cancel(msg, hdr);
3824         return -EMSGSIZE;
3825 }
3826
3827 static int nl80211_dump_mpath(struct sk_buff *skb,
3828                               struct netlink_callback *cb)
3829 {
3830         struct mpath_info pinfo;
3831         struct cfg80211_registered_device *dev;
3832         struct net_device *netdev;
3833         u8 dst[ETH_ALEN];
3834         u8 next_hop[ETH_ALEN];
3835         int path_idx = cb->args[1];
3836         int err;
3837
3838         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3839         if (err)
3840                 return err;
3841
3842         if (!dev->ops->dump_mpath) {
3843                 err = -EOPNOTSUPP;
3844                 goto out_err;
3845         }
3846
3847         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3848                 err = -EOPNOTSUPP;
3849                 goto out_err;
3850         }
3851
3852         while (1) {
3853                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3854                                       &pinfo);
3855                 if (err == -ENOENT)
3856                         break;
3857                 if (err)
3858                         goto out_err;
3859
3860                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3861                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3862                                        netdev, dst, next_hop,
3863                                        &pinfo) < 0)
3864                         goto out;
3865
3866                 path_idx++;
3867         }
3868
3869
3870  out:
3871         cb->args[1] = path_idx;
3872         err = skb->len;
3873  out_err:
3874         nl80211_finish_netdev_dump(dev);
3875         return err;
3876 }
3877
3878 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3879 {
3880         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3881         int err;
3882         struct net_device *dev = info->user_ptr[1];
3883         struct mpath_info pinfo;
3884         struct sk_buff *msg;
3885         u8 *dst = NULL;
3886         u8 next_hop[ETH_ALEN];
3887
3888         memset(&pinfo, 0, sizeof(pinfo));
3889
3890         if (!info->attrs[NL80211_ATTR_MAC])
3891                 return -EINVAL;
3892
3893         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3894
3895         if (!rdev->ops->get_mpath)
3896                 return -EOPNOTSUPP;
3897
3898         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3899                 return -EOPNOTSUPP;
3900
3901         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3902         if (err)
3903                 return err;
3904
3905         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3906         if (!msg)
3907                 return -ENOMEM;
3908
3909         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3910                                  dev, dst, next_hop, &pinfo) < 0) {
3911                 nlmsg_free(msg);
3912                 return -ENOBUFS;
3913         }
3914
3915         return genlmsg_reply(msg, info);
3916 }
3917
3918 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3919 {
3920         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3921         struct net_device *dev = info->user_ptr[1];
3922         u8 *dst = NULL;
3923         u8 *next_hop = NULL;
3924
3925         if (!info->attrs[NL80211_ATTR_MAC])
3926                 return -EINVAL;
3927
3928         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3929                 return -EINVAL;
3930
3931         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3932         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3933
3934         if (!rdev->ops->change_mpath)
3935                 return -EOPNOTSUPP;
3936
3937         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3938                 return -EOPNOTSUPP;
3939
3940         return rdev_change_mpath(rdev, dev, dst, next_hop);
3941 }
3942
3943 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3944 {
3945         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3946         struct net_device *dev = info->user_ptr[1];
3947         u8 *dst = NULL;
3948         u8 *next_hop = NULL;
3949
3950         if (!info->attrs[NL80211_ATTR_MAC])
3951                 return -EINVAL;
3952
3953         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3954                 return -EINVAL;
3955
3956         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3957         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3958
3959         if (!rdev->ops->add_mpath)
3960                 return -EOPNOTSUPP;
3961
3962         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3963                 return -EOPNOTSUPP;
3964
3965         return rdev_add_mpath(rdev, dev, dst, next_hop);
3966 }
3967
3968 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3969 {
3970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3971         struct net_device *dev = info->user_ptr[1];
3972         u8 *dst = NULL;
3973
3974         if (info->attrs[NL80211_ATTR_MAC])
3975                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3976
3977         if (!rdev->ops->del_mpath)
3978                 return -EOPNOTSUPP;
3979
3980         return rdev_del_mpath(rdev, dev, dst);
3981 }
3982
3983 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3984 {
3985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3986         struct net_device *dev = info->user_ptr[1];
3987         struct bss_parameters params;
3988
3989         memset(&params, 0, sizeof(params));
3990         /* default to not changing parameters */
3991         params.use_cts_prot = -1;
3992         params.use_short_preamble = -1;
3993         params.use_short_slot_time = -1;
3994         params.ap_isolate = -1;
3995         params.ht_opmode = -1;
3996         params.p2p_ctwindow = -1;
3997         params.p2p_opp_ps = -1;
3998
3999         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4000                 params.use_cts_prot =
4001                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4002         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4003                 params.use_short_preamble =
4004                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4005         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4006                 params.use_short_slot_time =
4007                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4008         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4009                 params.basic_rates =
4010                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4011                 params.basic_rates_len =
4012                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4013         }
4014         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4015                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4016         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4017                 params.ht_opmode =
4018                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4019
4020         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4021                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4022                         return -EINVAL;
4023                 params.p2p_ctwindow =
4024                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4025                 if (params.p2p_ctwindow < 0)
4026                         return -EINVAL;
4027                 if (params.p2p_ctwindow != 0 &&
4028                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4029                         return -EINVAL;
4030         }
4031
4032         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4033                 u8 tmp;
4034
4035                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4036                         return -EINVAL;
4037                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4038                 if (tmp > 1)
4039                         return -EINVAL;
4040                 params.p2p_opp_ps = tmp;
4041                 if (params.p2p_opp_ps &&
4042                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4043                         return -EINVAL;
4044         }
4045
4046         if (!rdev->ops->change_bss)
4047                 return -EOPNOTSUPP;
4048
4049         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4050             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4051                 return -EOPNOTSUPP;
4052
4053         return rdev_change_bss(rdev, dev, &params);
4054 }
4055
4056 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4057         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4058         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4059         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4060         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4061         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4062         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4063 };
4064
4065 static int parse_reg_rule(struct nlattr *tb[],
4066         struct ieee80211_reg_rule *reg_rule)
4067 {
4068         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4069         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4070
4071         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4072                 return -EINVAL;
4073         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4074                 return -EINVAL;
4075         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4076                 return -EINVAL;
4077         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4078                 return -EINVAL;
4079         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4080                 return -EINVAL;
4081
4082         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4083
4084         freq_range->start_freq_khz =
4085                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4086         freq_range->end_freq_khz =
4087                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4088         freq_range->max_bandwidth_khz =
4089                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4090
4091         power_rule->max_eirp =
4092                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4093
4094         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4095                 power_rule->max_antenna_gain =
4096                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4097
4098         return 0;
4099 }
4100
4101 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4102 {
4103         int r;
4104         char *data = NULL;
4105         enum nl80211_user_reg_hint_type user_reg_hint_type;
4106
4107         /*
4108          * You should only get this when cfg80211 hasn't yet initialized
4109          * completely when built-in to the kernel right between the time
4110          * window between nl80211_init() and regulatory_init(), if that is
4111          * even possible.
4112          */
4113         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4114                 return -EINPROGRESS;
4115
4116         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4117                 return -EINVAL;
4118
4119         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4120
4121         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4122                 user_reg_hint_type =
4123                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4124         else
4125                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4126
4127         switch (user_reg_hint_type) {
4128         case NL80211_USER_REG_HINT_USER:
4129         case NL80211_USER_REG_HINT_CELL_BASE:
4130                 break;
4131         default:
4132                 return -EINVAL;
4133         }
4134
4135         r = regulatory_hint_user(data, user_reg_hint_type);
4136
4137         return r;
4138 }
4139
4140 static int nl80211_get_mesh_config(struct sk_buff *skb,
4141                                    struct genl_info *info)
4142 {
4143         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4144         struct net_device *dev = info->user_ptr[1];
4145         struct wireless_dev *wdev = dev->ieee80211_ptr;
4146         struct mesh_config cur_params;
4147         int err = 0;
4148         void *hdr;
4149         struct nlattr *pinfoattr;
4150         struct sk_buff *msg;
4151
4152         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4153                 return -EOPNOTSUPP;
4154
4155         if (!rdev->ops->get_mesh_config)
4156                 return -EOPNOTSUPP;
4157
4158         wdev_lock(wdev);
4159         /* If not connected, get default parameters */
4160         if (!wdev->mesh_id_len)
4161                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4162         else
4163                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4164         wdev_unlock(wdev);
4165
4166         if (err)
4167                 return err;
4168
4169         /* Draw up a netlink message to send back */
4170         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4171         if (!msg)
4172                 return -ENOMEM;
4173         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4174                              NL80211_CMD_GET_MESH_CONFIG);
4175         if (!hdr)
4176                 goto out;
4177         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4178         if (!pinfoattr)
4179                 goto nla_put_failure;
4180         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4181             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4182                         cur_params.dot11MeshRetryTimeout) ||
4183             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4184                         cur_params.dot11MeshConfirmTimeout) ||
4185             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4186                         cur_params.dot11MeshHoldingTimeout) ||
4187             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4188                         cur_params.dot11MeshMaxPeerLinks) ||
4189             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4190                        cur_params.dot11MeshMaxRetries) ||
4191             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4192                        cur_params.dot11MeshTTL) ||
4193             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4194                        cur_params.element_ttl) ||
4195             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4196                        cur_params.auto_open_plinks) ||
4197             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4198                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4199             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4200                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4201             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4202                         cur_params.path_refresh_time) ||
4203             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4204                         cur_params.min_discovery_timeout) ||
4205             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4206                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4207             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4208                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4209             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4210                         cur_params.dot11MeshHWMPperrMinInterval) ||
4211             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4212                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4213             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4214                        cur_params.dot11MeshHWMPRootMode) ||
4215             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4216                         cur_params.dot11MeshHWMPRannInterval) ||
4217             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4218                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4219             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4220                        cur_params.dot11MeshForwarding) ||
4221             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4222                         cur_params.rssi_threshold) ||
4223             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4224                         cur_params.ht_opmode) ||
4225             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4226                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4227             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4228                         cur_params.dot11MeshHWMProotInterval) ||
4229             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4230                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4231             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4232                         cur_params.power_mode) ||
4233             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4234                         cur_params.dot11MeshAwakeWindowDuration))
4235                 goto nla_put_failure;
4236         nla_nest_end(msg, pinfoattr);
4237         genlmsg_end(msg, hdr);
4238         return genlmsg_reply(msg, info);
4239
4240  nla_put_failure:
4241         genlmsg_cancel(msg, hdr);
4242  out:
4243         nlmsg_free(msg);
4244         return -ENOBUFS;
4245 }
4246
4247 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4248         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4249         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4250         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4251         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4252         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4253         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4254         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4255         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4256         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4257         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4258         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4259         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4260         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4261         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4262         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4263         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4264         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4265         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4266         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4267         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4268         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4269         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4270         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4271         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4272         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4273         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4274         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4275 };
4276
4277 static const struct nla_policy
4278         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4279         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4280         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4281         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4282         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4283         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4284                                     .len = IEEE80211_MAX_DATA_LEN },
4285         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4286 };
4287
4288 static int nl80211_parse_mesh_config(struct genl_info *info,
4289                                      struct mesh_config *cfg,
4290                                      u32 *mask_out)
4291 {
4292         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4293         u32 mask = 0;
4294
4295 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4296 do {                                                                        \
4297         if (tb[attr]) {                                                     \
4298                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4299                         return -EINVAL;                                     \
4300                 cfg->param = fn(tb[attr]);                                  \
4301                 mask |= (1 << (attr - 1));                                  \
4302         }                                                                   \
4303 } while (0)
4304
4305
4306         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4307                 return -EINVAL;
4308         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4309                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4310                              nl80211_meshconf_params_policy))
4311                 return -EINVAL;
4312
4313         /* This makes sure that there aren't more than 32 mesh config
4314          * parameters (otherwise our bitfield scheme would not work.) */
4315         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4316
4317         /* Fill in the params struct */
4318         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4319                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4320                                   nla_get_u16);
4321         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4322                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4323                                   nla_get_u16);
4324         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4325                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4326                                   nla_get_u16);
4327         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4328                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4329                                   nla_get_u16);
4330         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4331                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4332                                   nla_get_u8);
4333         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4334                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4335         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4336                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4337                                   nla_get_u8);
4338         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4339                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4340                                   nla_get_u8);
4341         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4342                                   1, 255, mask,
4343                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4344                                   nla_get_u32);
4345         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4346                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4347                                   nla_get_u8);
4348         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4349                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4350                                   nla_get_u32);
4351         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4352                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4353                                   nla_get_u16);
4354         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4355                                   1, 65535, mask,
4356                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4357                                   nla_get_u32);
4358         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4359                                   1, 65535, mask,
4360                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4361                                   nla_get_u16);
4362         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4363                                   1, 65535, mask,
4364                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4365                                   nla_get_u16);
4366         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4367                                   dot11MeshHWMPnetDiameterTraversalTime,
4368                                   1, 65535, mask,
4369                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4370                                   nla_get_u16);
4371         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4372                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4373                                   nla_get_u8);
4374         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4375                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4376                                   nla_get_u16);
4377         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4378                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4379                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4380                                   nla_get_u8);
4381         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4382                                   mask, NL80211_MESHCONF_FORWARDING,
4383                                   nla_get_u8);
4384         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4385                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4386                                   nla_get_u32);
4387         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4388                                   mask, NL80211_MESHCONF_HT_OPMODE,
4389                                   nla_get_u16);
4390         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4391                                   1, 65535, mask,
4392                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4393                                   nla_get_u32);
4394         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4395                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4396                                   nla_get_u16);
4397         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4398                                   dot11MeshHWMPconfirmationInterval,
4399                                   1, 65535, mask,
4400                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4401                                   nla_get_u16);
4402         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4403                                   NL80211_MESH_POWER_ACTIVE,
4404                                   NL80211_MESH_POWER_MAX,
4405                                   mask, NL80211_MESHCONF_POWER_MODE,
4406                                   nla_get_u32);
4407         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4408                                   0, 65535, mask,
4409                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4410         if (mask_out)
4411                 *mask_out = mask;
4412
4413         return 0;
4414
4415 #undef FILL_IN_MESH_PARAM_IF_SET
4416 }
4417
4418 static int nl80211_parse_mesh_setup(struct genl_info *info,
4419                                      struct mesh_setup *setup)
4420 {
4421         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4422
4423         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4424                 return -EINVAL;
4425         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4426                              info->attrs[NL80211_ATTR_MESH_SETUP],
4427                              nl80211_mesh_setup_params_policy))
4428                 return -EINVAL;
4429
4430         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4431                 setup->sync_method =
4432                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4433                  IEEE80211_SYNC_METHOD_VENDOR :
4434                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4435
4436         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4437                 setup->path_sel_proto =
4438                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4439                  IEEE80211_PATH_PROTOCOL_VENDOR :
4440                  IEEE80211_PATH_PROTOCOL_HWMP;
4441
4442         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4443                 setup->path_metric =
4444                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4445                  IEEE80211_PATH_METRIC_VENDOR :
4446                  IEEE80211_PATH_METRIC_AIRTIME;
4447
4448
4449         if (tb[NL80211_MESH_SETUP_IE]) {
4450                 struct nlattr *ieattr =
4451                         tb[NL80211_MESH_SETUP_IE];
4452                 if (!is_valid_ie_attr(ieattr))
4453                         return -EINVAL;
4454                 setup->ie = nla_data(ieattr);
4455                 setup->ie_len = nla_len(ieattr);
4456         }
4457         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4458         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4459
4460         return 0;
4461 }
4462
4463 static int nl80211_update_mesh_config(struct sk_buff *skb,
4464                                       struct genl_info *info)
4465 {
4466         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4467         struct net_device *dev = info->user_ptr[1];
4468         struct wireless_dev *wdev = dev->ieee80211_ptr;
4469         struct mesh_config cfg;
4470         u32 mask;
4471         int err;
4472
4473         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4474                 return -EOPNOTSUPP;
4475
4476         if (!rdev->ops->update_mesh_config)
4477                 return -EOPNOTSUPP;
4478
4479         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4480         if (err)
4481                 return err;
4482
4483         wdev_lock(wdev);
4484         if (!wdev->mesh_id_len)
4485                 err = -ENOLINK;
4486
4487         if (!err)
4488                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4489
4490         wdev_unlock(wdev);
4491
4492         return err;
4493 }
4494
4495 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4496 {
4497         const struct ieee80211_regdomain *regdom;
4498         struct sk_buff *msg;
4499         void *hdr = NULL;
4500         struct nlattr *nl_reg_rules;
4501         unsigned int i;
4502         int err = -EINVAL;
4503
4504         mutex_lock(&cfg80211_mutex);
4505
4506         if (!cfg80211_regdomain)
4507                 goto out;
4508
4509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4510         if (!msg) {
4511                 err = -ENOBUFS;
4512                 goto out;
4513         }
4514
4515         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4516                              NL80211_CMD_GET_REG);
4517         if (!hdr)
4518                 goto put_failure;
4519
4520         if (reg_last_request_cell_base() &&
4521             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4522                         NL80211_USER_REG_HINT_CELL_BASE))
4523                 goto nla_put_failure;
4524
4525         rcu_read_lock();
4526         regdom = rcu_dereference(cfg80211_regdomain);
4527
4528         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4529             (regdom->dfs_region &&
4530              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4531                 goto nla_put_failure_rcu;
4532
4533         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4534         if (!nl_reg_rules)
4535                 goto nla_put_failure_rcu;
4536
4537         for (i = 0; i < regdom->n_reg_rules; i++) {
4538                 struct nlattr *nl_reg_rule;
4539                 const struct ieee80211_reg_rule *reg_rule;
4540                 const struct ieee80211_freq_range *freq_range;
4541                 const struct ieee80211_power_rule *power_rule;
4542
4543                 reg_rule = &regdom->reg_rules[i];
4544                 freq_range = &reg_rule->freq_range;
4545                 power_rule = &reg_rule->power_rule;
4546
4547                 nl_reg_rule = nla_nest_start(msg, i);
4548                 if (!nl_reg_rule)
4549                         goto nla_put_failure_rcu;
4550
4551                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4552                                 reg_rule->flags) ||
4553                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4554                                 freq_range->start_freq_khz) ||
4555                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4556                                 freq_range->end_freq_khz) ||
4557                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4558                                 freq_range->max_bandwidth_khz) ||
4559                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4560                                 power_rule->max_antenna_gain) ||
4561                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4562                                 power_rule->max_eirp))
4563                         goto nla_put_failure_rcu;
4564
4565                 nla_nest_end(msg, nl_reg_rule);
4566         }
4567         rcu_read_unlock();
4568
4569         nla_nest_end(msg, nl_reg_rules);
4570
4571         genlmsg_end(msg, hdr);
4572         err = genlmsg_reply(msg, info);
4573         goto out;
4574
4575 nla_put_failure_rcu:
4576         rcu_read_unlock();
4577 nla_put_failure:
4578         genlmsg_cancel(msg, hdr);
4579 put_failure:
4580         nlmsg_free(msg);
4581         err = -EMSGSIZE;
4582 out:
4583         mutex_unlock(&cfg80211_mutex);
4584         return err;
4585 }
4586
4587 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4588 {
4589         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4590         struct nlattr *nl_reg_rule;
4591         char *alpha2 = NULL;
4592         int rem_reg_rules = 0, r = 0;
4593         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4594         u8 dfs_region = 0;
4595         struct ieee80211_regdomain *rd = NULL;
4596
4597         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4598                 return -EINVAL;
4599
4600         if (!info->attrs[NL80211_ATTR_REG_RULES])
4601                 return -EINVAL;
4602
4603         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4604
4605         if (info->attrs[NL80211_ATTR_DFS_REGION])
4606                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4607
4608         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4609                             rem_reg_rules) {
4610                 num_rules++;
4611                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4612                         return -EINVAL;
4613         }
4614
4615         size_of_regd = sizeof(struct ieee80211_regdomain) +
4616                        num_rules * sizeof(struct ieee80211_reg_rule);
4617
4618         rd = kzalloc(size_of_regd, GFP_KERNEL);
4619         if (!rd)
4620                 return -ENOMEM;
4621
4622         rd->n_reg_rules = num_rules;
4623         rd->alpha2[0] = alpha2[0];
4624         rd->alpha2[1] = alpha2[1];
4625
4626         /*
4627          * Disable DFS master mode if the DFS region was
4628          * not supported or known on this kernel.
4629          */
4630         if (reg_supported_dfs_region(dfs_region))
4631                 rd->dfs_region = dfs_region;
4632
4633         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4634                             rem_reg_rules) {
4635                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4636                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4637                           reg_rule_policy);
4638                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4639                 if (r)
4640                         goto bad_reg;
4641
4642                 rule_idx++;
4643
4644                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4645                         r = -EINVAL;
4646                         goto bad_reg;
4647                 }
4648         }
4649
4650         mutex_lock(&cfg80211_mutex);
4651
4652         r = set_regdom(rd);
4653         /* set_regdom took ownership */
4654         rd = NULL;
4655         mutex_unlock(&cfg80211_mutex);
4656
4657  bad_reg:
4658         kfree(rd);
4659         return r;
4660 }
4661
4662 static int validate_scan_freqs(struct nlattr *freqs)
4663 {
4664         struct nlattr *attr1, *attr2;
4665         int n_channels = 0, tmp1, tmp2;
4666
4667         nla_for_each_nested(attr1, freqs, tmp1) {
4668                 n_channels++;
4669                 /*
4670                  * Some hardware has a limited channel list for
4671                  * scanning, and it is pretty much nonsensical
4672                  * to scan for a channel twice, so disallow that
4673                  * and don't require drivers to check that the
4674                  * channel list they get isn't longer than what
4675                  * they can scan, as long as they can scan all
4676                  * the channels they registered at once.
4677                  */
4678                 nla_for_each_nested(attr2, freqs, tmp2)
4679                         if (attr1 != attr2 &&
4680                             nla_get_u32(attr1) == nla_get_u32(attr2))
4681                                 return 0;
4682         }
4683
4684         return n_channels;
4685 }
4686
4687 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4688 {
4689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4690         struct wireless_dev *wdev = info->user_ptr[1];
4691         struct cfg80211_scan_request *request;
4692         struct nlattr *attr;
4693         struct wiphy *wiphy;
4694         int err, tmp, n_ssids = 0, n_channels, i;
4695         size_t ie_len;
4696
4697         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4698                 return -EINVAL;
4699
4700         wiphy = &rdev->wiphy;
4701
4702         if (!rdev->ops->scan)
4703                 return -EOPNOTSUPP;
4704
4705         if (rdev->scan_req)
4706                 return -EBUSY;
4707
4708         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4709                 n_channels = validate_scan_freqs(
4710                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4711                 if (!n_channels)
4712                         return -EINVAL;
4713         } else {
4714                 enum ieee80211_band band;
4715                 n_channels = 0;
4716
4717                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4718                         if (wiphy->bands[band])
4719                                 n_channels += wiphy->bands[band]->n_channels;
4720         }
4721
4722         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4723                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4724                         n_ssids++;
4725
4726         if (n_ssids > wiphy->max_scan_ssids)
4727                 return -EINVAL;
4728
4729         if (info->attrs[NL80211_ATTR_IE])
4730                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4731         else
4732                 ie_len = 0;
4733
4734         if (ie_len > wiphy->max_scan_ie_len)
4735                 return -EINVAL;
4736
4737         request = kzalloc(sizeof(*request)
4738                         + sizeof(*request->ssids) * n_ssids
4739                         + sizeof(*request->channels) * n_channels
4740                         + ie_len, GFP_KERNEL);
4741         if (!request)
4742                 return -ENOMEM;
4743
4744         if (n_ssids)
4745                 request->ssids = (void *)&request->channels[n_channels];
4746         request->n_ssids = n_ssids;
4747         if (ie_len) {
4748                 if (request->ssids)
4749                         request->ie = (void *)(request->ssids + n_ssids);
4750                 else
4751                         request->ie = (void *)(request->channels + n_channels);
4752         }
4753
4754         i = 0;
4755         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4756                 /* user specified, bail out if channel not found */
4757                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4758                         struct ieee80211_channel *chan;
4759
4760                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4761
4762                         if (!chan) {
4763                                 err = -EINVAL;
4764                                 goto out_free;
4765                         }
4766
4767                         /* ignore disabled channels */
4768                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4769                                 continue;
4770
4771                         request->channels[i] = chan;
4772                         i++;
4773                 }
4774         } else {
4775                 enum ieee80211_band band;
4776
4777                 /* all channels */
4778                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4779                         int j;
4780                         if (!wiphy->bands[band])
4781                                 continue;
4782                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4783                                 struct ieee80211_channel *chan;
4784
4785                                 chan = &wiphy->bands[band]->channels[j];
4786
4787                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4788                                         continue;
4789
4790                                 request->channels[i] = chan;
4791                                 i++;
4792                         }
4793                 }
4794         }
4795
4796         if (!i) {
4797                 err = -EINVAL;
4798                 goto out_free;
4799         }
4800
4801         request->n_channels = i;
4802
4803         i = 0;
4804         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4805                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4806                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4807                                 err = -EINVAL;
4808                                 goto out_free;
4809                         }
4810                         request->ssids[i].ssid_len = nla_len(attr);
4811                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4812                         i++;
4813                 }
4814         }
4815
4816         if (info->attrs[NL80211_ATTR_IE]) {
4817                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4818                 memcpy((void *)request->ie,
4819                        nla_data(info->attrs[NL80211_ATTR_IE]),
4820                        request->ie_len);
4821         }
4822
4823         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4824                 if (wiphy->bands[i])
4825                         request->rates[i] =
4826                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4827
4828         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4829                 nla_for_each_nested(attr,
4830                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4831                                     tmp) {
4832                         enum ieee80211_band band = nla_type(attr);
4833
4834                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4835                                 err = -EINVAL;
4836                                 goto out_free;
4837                         }
4838                         err = ieee80211_get_ratemask(wiphy->bands[band],
4839                                                      nla_data(attr),
4840                                                      nla_len(attr),
4841                                                      &request->rates[band]);
4842                         if (err)
4843                                 goto out_free;
4844                 }
4845         }
4846
4847         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4848                 request->flags = nla_get_u32(
4849                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4850                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4851                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4852                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4853                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4854                         err = -EOPNOTSUPP;
4855                         goto out_free;
4856                 }
4857         }
4858
4859         request->no_cck =
4860                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4861
4862         request->wdev = wdev;
4863         request->wiphy = &rdev->wiphy;
4864         request->scan_start = jiffies;
4865
4866         rdev->scan_req = request;
4867         err = rdev_scan(rdev, request);
4868
4869         if (!err) {
4870                 nl80211_send_scan_start(rdev, wdev);
4871                 if (wdev->netdev)
4872                         dev_hold(wdev->netdev);
4873         } else {
4874  out_free:
4875                 rdev->scan_req = NULL;
4876                 kfree(request);
4877         }
4878
4879         return err;
4880 }
4881
4882 static int nl80211_start_sched_scan(struct sk_buff *skb,
4883                                     struct genl_info *info)
4884 {
4885         struct cfg80211_sched_scan_request *request;
4886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4887         struct net_device *dev = info->user_ptr[1];
4888         struct nlattr *attr;
4889         struct wiphy *wiphy;
4890         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4891         u32 interval;
4892         enum ieee80211_band band;
4893         size_t ie_len;
4894         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4895
4896         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4897             !rdev->ops->sched_scan_start)
4898                 return -EOPNOTSUPP;
4899
4900         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4901                 return -EINVAL;
4902
4903         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4904                 return -EINVAL;
4905
4906         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4907         if (interval == 0)
4908                 return -EINVAL;
4909
4910         wiphy = &rdev->wiphy;
4911
4912         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4913                 n_channels = validate_scan_freqs(
4914                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4915                 if (!n_channels)
4916                         return -EINVAL;
4917         } else {
4918                 n_channels = 0;
4919
4920                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4921                         if (wiphy->bands[band])
4922                                 n_channels += wiphy->bands[band]->n_channels;
4923         }
4924
4925         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4926                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4927                                     tmp)
4928                         n_ssids++;
4929
4930         if (n_ssids > wiphy->max_sched_scan_ssids)
4931                 return -EINVAL;
4932
4933         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4934                 nla_for_each_nested(attr,
4935                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4936                                     tmp)
4937                         n_match_sets++;
4938
4939         if (n_match_sets > wiphy->max_match_sets)
4940                 return -EINVAL;
4941
4942         if (info->attrs[NL80211_ATTR_IE])
4943                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4944         else
4945                 ie_len = 0;
4946
4947         if (ie_len > wiphy->max_sched_scan_ie_len)
4948                 return -EINVAL;
4949
4950         mutex_lock(&rdev->sched_scan_mtx);
4951
4952         if (rdev->sched_scan_req) {
4953                 err = -EINPROGRESS;
4954                 goto out;
4955         }
4956
4957         request = kzalloc(sizeof(*request)
4958                         + sizeof(*request->ssids) * n_ssids
4959                         + sizeof(*request->match_sets) * n_match_sets
4960                         + sizeof(*request->channels) * n_channels
4961                         + ie_len, GFP_KERNEL);
4962         if (!request) {
4963                 err = -ENOMEM;
4964                 goto out;
4965         }
4966
4967         if (n_ssids)
4968                 request->ssids = (void *)&request->channels[n_channels];
4969         request->n_ssids = n_ssids;
4970         if (ie_len) {
4971                 if (request->ssids)
4972                         request->ie = (void *)(request->ssids + n_ssids);
4973                 else
4974                         request->ie = (void *)(request->channels + n_channels);
4975         }
4976
4977         if (n_match_sets) {
4978                 if (request->ie)
4979                         request->match_sets = (void *)(request->ie + ie_len);
4980                 else if (request->ssids)
4981                         request->match_sets =
4982                                 (void *)(request->ssids + n_ssids);
4983                 else
4984                         request->match_sets =
4985                                 (void *)(request->channels + n_channels);
4986         }
4987         request->n_match_sets = n_match_sets;
4988
4989         i = 0;
4990         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4991                 /* user specified, bail out if channel not found */
4992                 nla_for_each_nested(attr,
4993                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4994                                     tmp) {
4995                         struct ieee80211_channel *chan;
4996
4997                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4998
4999                         if (!chan) {
5000                                 err = -EINVAL;
5001                                 goto out_free;
5002                         }
5003
5004                         /* ignore disabled channels */
5005                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5006                                 continue;
5007
5008                         request->channels[i] = chan;
5009                         i++;
5010                 }
5011         } else {
5012                 /* all channels */
5013                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5014                         int j;
5015                         if (!wiphy->bands[band])
5016                                 continue;
5017                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5018                                 struct ieee80211_channel *chan;
5019
5020                                 chan = &wiphy->bands[band]->channels[j];
5021
5022                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5023                                         continue;
5024
5025                                 request->channels[i] = chan;
5026                                 i++;
5027                         }
5028                 }
5029         }
5030
5031         if (!i) {
5032                 err = -EINVAL;
5033                 goto out_free;
5034         }
5035
5036         request->n_channels = i;
5037
5038         i = 0;
5039         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5040                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5041                                     tmp) {
5042                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5043                                 err = -EINVAL;
5044                                 goto out_free;
5045                         }
5046                         request->ssids[i].ssid_len = nla_len(attr);
5047                         memcpy(request->ssids[i].ssid, nla_data(attr),
5048                                nla_len(attr));
5049                         i++;
5050                 }
5051         }
5052
5053         i = 0;
5054         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5055                 nla_for_each_nested(attr,
5056                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5057                                     tmp) {
5058                         struct nlattr *ssid, *rssi;
5059
5060                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5061                                   nla_data(attr), nla_len(attr),
5062                                   nl80211_match_policy);
5063                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5064                         if (ssid) {
5065                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5066                                         err = -EINVAL;
5067                                         goto out_free;
5068                                 }
5069                                 memcpy(request->match_sets[i].ssid.ssid,
5070                                        nla_data(ssid), nla_len(ssid));
5071                                 request->match_sets[i].ssid.ssid_len =
5072                                         nla_len(ssid);
5073                         }
5074                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5075                         if (rssi)
5076                                 request->rssi_thold = nla_get_u32(rssi);
5077                         else
5078                                 request->rssi_thold =
5079                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5080                         i++;
5081                 }
5082         }
5083
5084         if (info->attrs[NL80211_ATTR_IE]) {
5085                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5086                 memcpy((void *)request->ie,
5087                        nla_data(info->attrs[NL80211_ATTR_IE]),
5088                        request->ie_len);
5089         }
5090
5091         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5092                 request->flags = nla_get_u32(
5093                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5094                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5095                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5096                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5097                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5098                         err = -EOPNOTSUPP;
5099                         goto out_free;
5100                 }
5101         }
5102
5103         request->dev = dev;
5104         request->wiphy = &rdev->wiphy;
5105         request->interval = interval;
5106         request->scan_start = jiffies;
5107
5108         err = rdev_sched_scan_start(rdev, dev, request);
5109         if (!err) {
5110                 rdev->sched_scan_req = request;
5111                 nl80211_send_sched_scan(rdev, dev,
5112                                         NL80211_CMD_START_SCHED_SCAN);
5113                 goto out;
5114         }
5115
5116 out_free:
5117         kfree(request);
5118 out:
5119         mutex_unlock(&rdev->sched_scan_mtx);
5120         return err;
5121 }
5122
5123 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5124                                    struct genl_info *info)
5125 {
5126         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5127         int err;
5128
5129         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5130             !rdev->ops->sched_scan_stop)
5131                 return -EOPNOTSUPP;
5132
5133         mutex_lock(&rdev->sched_scan_mtx);
5134         err = __cfg80211_stop_sched_scan(rdev, false);
5135         mutex_unlock(&rdev->sched_scan_mtx);
5136
5137         return err;
5138 }
5139
5140 static int nl80211_start_radar_detection(struct sk_buff *skb,
5141                                          struct genl_info *info)
5142 {
5143         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5144         struct net_device *dev = info->user_ptr[1];
5145         struct wireless_dev *wdev = dev->ieee80211_ptr;
5146         struct cfg80211_chan_def chandef;
5147         int err;
5148
5149         err = nl80211_parse_chandef(rdev, info, &chandef);
5150         if (err)
5151                 return err;
5152
5153         if (wdev->cac_started)
5154                 return -EBUSY;
5155
5156         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5157         if (err < 0)
5158                 return err;
5159
5160         if (err == 0)
5161                 return -EINVAL;
5162
5163         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5164                 return -EINVAL;
5165
5166         if (!rdev->ops->start_radar_detection)
5167                 return -EOPNOTSUPP;
5168
5169         mutex_lock(&rdev->devlist_mtx);
5170         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5171                                            chandef.chan, CHAN_MODE_SHARED,
5172                                            BIT(chandef.width));
5173         if (err)
5174                 goto err_locked;
5175
5176         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5177         if (!err) {
5178                 wdev->channel = chandef.chan;
5179                 wdev->cac_started = true;
5180                 wdev->cac_start_time = jiffies;
5181         }
5182 err_locked:
5183         mutex_unlock(&rdev->devlist_mtx);
5184
5185         return err;
5186 }
5187
5188 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5189                             u32 seq, int flags,
5190                             struct cfg80211_registered_device *rdev,
5191                             struct wireless_dev *wdev,
5192                             struct cfg80211_internal_bss *intbss)
5193 {
5194         struct cfg80211_bss *res = &intbss->pub;
5195         const struct cfg80211_bss_ies *ies;
5196         void *hdr;
5197         struct nlattr *bss;
5198         bool tsf = false;
5199
5200         ASSERT_WDEV_LOCK(wdev);
5201
5202         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5203                              NL80211_CMD_NEW_SCAN_RESULTS);
5204         if (!hdr)
5205                 return -1;
5206
5207         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5208
5209         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
5210             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5211                 goto nla_put_failure;
5212
5213         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5214         if (!bss)
5215                 goto nla_put_failure;
5216         if ((!is_zero_ether_addr(res->bssid) &&
5217              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5218                 goto nla_put_failure;
5219
5220         rcu_read_lock();
5221         ies = rcu_dereference(res->ies);
5222         if (ies) {
5223                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5224                         goto fail_unlock_rcu;
5225                 tsf = true;
5226                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5227                                         ies->len, ies->data))
5228                         goto fail_unlock_rcu;
5229         }
5230         ies = rcu_dereference(res->beacon_ies);
5231         if (ies) {
5232                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5233                         goto fail_unlock_rcu;
5234                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5235                                         ies->len, ies->data))
5236                         goto fail_unlock_rcu;
5237         }
5238         rcu_read_unlock();
5239
5240         if (res->beacon_interval &&
5241             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5242                 goto nla_put_failure;
5243         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5244             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5245             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5246                         jiffies_to_msecs(jiffies - intbss->ts)))
5247                 goto nla_put_failure;
5248
5249         switch (rdev->wiphy.signal_type) {
5250         case CFG80211_SIGNAL_TYPE_MBM:
5251                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5252                         goto nla_put_failure;
5253                 break;
5254         case CFG80211_SIGNAL_TYPE_UNSPEC:
5255                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5256                         goto nla_put_failure;
5257                 break;
5258         default:
5259                 break;
5260         }
5261
5262         switch (wdev->iftype) {
5263         case NL80211_IFTYPE_P2P_CLIENT:
5264         case NL80211_IFTYPE_STATION:
5265                 if (intbss == wdev->current_bss &&
5266                     nla_put_u32(msg, NL80211_BSS_STATUS,
5267                                 NL80211_BSS_STATUS_ASSOCIATED))
5268                         goto nla_put_failure;
5269                 break;
5270         case NL80211_IFTYPE_ADHOC:
5271                 if (intbss == wdev->current_bss &&
5272                     nla_put_u32(msg, NL80211_BSS_STATUS,
5273                                 NL80211_BSS_STATUS_IBSS_JOINED))
5274                         goto nla_put_failure;
5275                 break;
5276         default:
5277                 break;
5278         }
5279
5280         nla_nest_end(msg, bss);
5281
5282         return genlmsg_end(msg, hdr);
5283
5284  fail_unlock_rcu:
5285         rcu_read_unlock();
5286  nla_put_failure:
5287         genlmsg_cancel(msg, hdr);
5288         return -EMSGSIZE;
5289 }
5290
5291 static int nl80211_dump_scan(struct sk_buff *skb,
5292                              struct netlink_callback *cb)
5293 {
5294         struct cfg80211_registered_device *rdev;
5295         struct net_device *dev;
5296         struct cfg80211_internal_bss *scan;
5297         struct wireless_dev *wdev;
5298         int start = cb->args[1], idx = 0;
5299         int err;
5300
5301         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
5302         if (err)
5303                 return err;
5304
5305         wdev = dev->ieee80211_ptr;
5306
5307         wdev_lock(wdev);
5308         spin_lock_bh(&rdev->bss_lock);
5309         cfg80211_bss_expire(rdev);
5310
5311         cb->seq = rdev->bss_generation;
5312
5313         list_for_each_entry(scan, &rdev->bss_list, list) {
5314                 if (++idx <= start)
5315                         continue;
5316                 if (nl80211_send_bss(skb, cb,
5317                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5318                                 rdev, wdev, scan) < 0) {
5319                         idx--;
5320                         break;
5321                 }
5322         }
5323
5324         spin_unlock_bh(&rdev->bss_lock);
5325         wdev_unlock(wdev);
5326
5327         cb->args[1] = idx;
5328         nl80211_finish_netdev_dump(rdev);
5329
5330         return skb->len;
5331 }
5332
5333 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5334                                 int flags, struct net_device *dev,
5335                                 struct survey_info *survey)
5336 {
5337         void *hdr;
5338         struct nlattr *infoattr;
5339
5340         hdr = nl80211hdr_put(msg, portid, seq, flags,
5341                              NL80211_CMD_NEW_SURVEY_RESULTS);
5342         if (!hdr)
5343                 return -ENOMEM;
5344
5345         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5346                 goto nla_put_failure;
5347
5348         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5349         if (!infoattr)
5350                 goto nla_put_failure;
5351
5352         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5353                         survey->channel->center_freq))
5354                 goto nla_put_failure;
5355
5356         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5357             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5358                 goto nla_put_failure;
5359         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5360             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5361                 goto nla_put_failure;
5362         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5363             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5364                         survey->channel_time))
5365                 goto nla_put_failure;
5366         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5367             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5368                         survey->channel_time_busy))
5369                 goto nla_put_failure;
5370         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5371             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5372                         survey->channel_time_ext_busy))
5373                 goto nla_put_failure;
5374         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5375             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5376                         survey->channel_time_rx))
5377                 goto nla_put_failure;
5378         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5379             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5380                         survey->channel_time_tx))
5381                 goto nla_put_failure;
5382
5383         nla_nest_end(msg, infoattr);
5384
5385         return genlmsg_end(msg, hdr);
5386
5387  nla_put_failure:
5388         genlmsg_cancel(msg, hdr);
5389         return -EMSGSIZE;
5390 }
5391
5392 static int nl80211_dump_survey(struct sk_buff *skb,
5393                         struct netlink_callback *cb)
5394 {
5395         struct survey_info survey;
5396         struct cfg80211_registered_device *dev;
5397         struct net_device *netdev;
5398         int survey_idx = cb->args[1];
5399         int res;
5400
5401         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5402         if (res)
5403                 return res;
5404
5405         if (!dev->ops->dump_survey) {
5406                 res = -EOPNOTSUPP;
5407                 goto out_err;
5408         }
5409
5410         while (1) {
5411                 struct ieee80211_channel *chan;
5412
5413                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5414                 if (res == -ENOENT)
5415                         break;
5416                 if (res)
5417                         goto out_err;
5418
5419                 /* Survey without a channel doesn't make sense */
5420                 if (!survey.channel) {
5421                         res = -EINVAL;
5422                         goto out;
5423                 }
5424
5425                 chan = ieee80211_get_channel(&dev->wiphy,
5426                                              survey.channel->center_freq);
5427                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5428                         survey_idx++;
5429                         continue;
5430                 }
5431
5432                 if (nl80211_send_survey(skb,
5433                                 NETLINK_CB(cb->skb).portid,
5434                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5435                                 netdev,
5436                                 &survey) < 0)
5437                         goto out;
5438                 survey_idx++;
5439         }
5440
5441  out:
5442         cb->args[1] = survey_idx;
5443         res = skb->len;
5444  out_err:
5445         nl80211_finish_netdev_dump(dev);
5446         return res;
5447 }
5448
5449 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5450 {
5451         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5452                                   NL80211_WPA_VERSION_2));
5453 }
5454
5455 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5456 {
5457         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5458         struct net_device *dev = info->user_ptr[1];
5459         struct ieee80211_channel *chan;
5460         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5461         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5462         enum nl80211_auth_type auth_type;
5463         struct key_parse key;
5464         bool local_state_change;
5465
5466         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5467                 return -EINVAL;
5468
5469         if (!info->attrs[NL80211_ATTR_MAC])
5470                 return -EINVAL;
5471
5472         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5473                 return -EINVAL;
5474
5475         if (!info->attrs[NL80211_ATTR_SSID])
5476                 return -EINVAL;
5477
5478         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5479                 return -EINVAL;
5480
5481         err = nl80211_parse_key(info, &key);
5482         if (err)
5483                 return err;
5484
5485         if (key.idx >= 0) {
5486                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5487                         return -EINVAL;
5488                 if (!key.p.key || !key.p.key_len)
5489                         return -EINVAL;
5490                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5491                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5492                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5493                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5494                         return -EINVAL;
5495                 if (key.idx > 4)
5496                         return -EINVAL;
5497         } else {
5498                 key.p.key_len = 0;
5499                 key.p.key = NULL;
5500         }
5501
5502         if (key.idx >= 0) {
5503                 int i;
5504                 bool ok = false;
5505                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5506                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5507                                 ok = true;
5508                                 break;
5509                         }
5510                 }
5511                 if (!ok)
5512                         return -EINVAL;
5513         }
5514
5515         if (!rdev->ops->auth)
5516                 return -EOPNOTSUPP;
5517
5518         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5519             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5520                 return -EOPNOTSUPP;
5521
5522         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5523         chan = ieee80211_get_channel(&rdev->wiphy,
5524                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5525         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5526                 return -EINVAL;
5527
5528         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5529         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5530
5531         if (info->attrs[NL80211_ATTR_IE]) {
5532                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5533                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5534         }
5535
5536         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5537         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5538                 return -EINVAL;
5539
5540         if (auth_type == NL80211_AUTHTYPE_SAE &&
5541             !info->attrs[NL80211_ATTR_SAE_DATA])
5542                 return -EINVAL;
5543
5544         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5545                 if (auth_type != NL80211_AUTHTYPE_SAE)
5546                         return -EINVAL;
5547                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5548                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5549                 /* need to include at least Auth Transaction and Status Code */
5550                 if (sae_data_len < 4)
5551                         return -EINVAL;
5552         }
5553
5554         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5555
5556         /*
5557          * Since we no longer track auth state, ignore
5558          * requests to only change local state.
5559          */
5560         if (local_state_change)
5561                 return 0;
5562
5563         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5564                                   ssid, ssid_len, ie, ie_len,
5565                                   key.p.key, key.p.key_len, key.idx,
5566                                   sae_data, sae_data_len);
5567 }
5568
5569 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5570                                    struct genl_info *info,
5571                                    struct cfg80211_crypto_settings *settings,
5572                                    int cipher_limit)
5573 {
5574         memset(settings, 0, sizeof(*settings));
5575
5576         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5577
5578         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5579                 u16 proto;
5580                 proto = nla_get_u16(
5581                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5582                 settings->control_port_ethertype = cpu_to_be16(proto);
5583                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5584                     proto != ETH_P_PAE)
5585                         return -EINVAL;
5586                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5587                         settings->control_port_no_encrypt = true;
5588         } else
5589                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5590
5591         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5592                 void *data;
5593                 int len, i;
5594
5595                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5596                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5597                 settings->n_ciphers_pairwise = len / sizeof(u32);
5598
5599                 if (len % sizeof(u32))
5600                         return -EINVAL;
5601
5602                 if (settings->n_ciphers_pairwise > cipher_limit)
5603                         return -EINVAL;
5604
5605                 memcpy(settings->ciphers_pairwise, data, len);
5606
5607                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5608                         if (!cfg80211_supported_cipher_suite(
5609                                         &rdev->wiphy,
5610                                         settings->ciphers_pairwise[i]))
5611                                 return -EINVAL;
5612         }
5613
5614         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5615                 settings->cipher_group =
5616                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5617                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5618                                                      settings->cipher_group))
5619                         return -EINVAL;
5620         }
5621
5622         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5623                 settings->wpa_versions =
5624                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5625                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5626                         return -EINVAL;
5627         }
5628
5629         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5630                 void *data;
5631                 int len;
5632
5633                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5634                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5635                 settings->n_akm_suites = len / sizeof(u32);
5636
5637                 if (len % sizeof(u32))
5638                         return -EINVAL;
5639
5640                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5641                         return -EINVAL;
5642
5643                 memcpy(settings->akm_suites, data, len);
5644         }
5645
5646         return 0;
5647 }
5648
5649 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5650 {
5651         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5652         struct net_device *dev = info->user_ptr[1];
5653         struct cfg80211_crypto_settings crypto;
5654         struct ieee80211_channel *chan;
5655         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5656         int err, ssid_len, ie_len = 0;
5657         bool use_mfp = false;
5658         u32 flags = 0;
5659         struct ieee80211_ht_cap *ht_capa = NULL;
5660         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5661
5662         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5663                 return -EINVAL;
5664
5665         if (!info->attrs[NL80211_ATTR_MAC] ||
5666             !info->attrs[NL80211_ATTR_SSID] ||
5667             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5668                 return -EINVAL;
5669
5670         if (!rdev->ops->assoc)
5671                 return -EOPNOTSUPP;
5672
5673         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5674             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5675                 return -EOPNOTSUPP;
5676
5677         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5678
5679         chan = ieee80211_get_channel(&rdev->wiphy,
5680                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5681         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5682                 return -EINVAL;
5683
5684         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5685         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5686
5687         if (info->attrs[NL80211_ATTR_IE]) {
5688                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5689                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5690         }
5691
5692         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5693                 enum nl80211_mfp mfp =
5694                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5695                 if (mfp == NL80211_MFP_REQUIRED)
5696                         use_mfp = true;
5697                 else if (mfp != NL80211_MFP_NO)
5698                         return -EINVAL;
5699         }
5700
5701         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5702                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5703
5704         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5705                 flags |= ASSOC_REQ_DISABLE_HT;
5706
5707         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5708                 ht_capa_mask =
5709                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5710
5711         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5712                 if (!ht_capa_mask)
5713                         return -EINVAL;
5714                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5715         }
5716
5717         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5718         if (!err)
5719                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5720                                           ssid, ssid_len, ie, ie_len, use_mfp,
5721                                           &crypto, flags, ht_capa,
5722                                           ht_capa_mask);
5723
5724         return err;
5725 }
5726
5727 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5728 {
5729         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5730         struct net_device *dev = info->user_ptr[1];
5731         const u8 *ie = NULL, *bssid;
5732         int ie_len = 0;
5733         u16 reason_code;
5734         bool local_state_change;
5735
5736         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5737                 return -EINVAL;
5738
5739         if (!info->attrs[NL80211_ATTR_MAC])
5740                 return -EINVAL;
5741
5742         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5743                 return -EINVAL;
5744
5745         if (!rdev->ops->deauth)
5746                 return -EOPNOTSUPP;
5747
5748         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5749             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5750                 return -EOPNOTSUPP;
5751
5752         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5753
5754         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5755         if (reason_code == 0) {
5756                 /* Reason Code 0 is reserved */
5757                 return -EINVAL;
5758         }
5759
5760         if (info->attrs[NL80211_ATTR_IE]) {
5761                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5762                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5763         }
5764
5765         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5766
5767         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5768                                     local_state_change);
5769 }
5770
5771 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5772 {
5773         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5774         struct net_device *dev = info->user_ptr[1];
5775         const u8 *ie = NULL, *bssid;
5776         int ie_len = 0;
5777         u16 reason_code;
5778         bool local_state_change;
5779
5780         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5781                 return -EINVAL;
5782
5783         if (!info->attrs[NL80211_ATTR_MAC])
5784                 return -EINVAL;
5785
5786         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5787                 return -EINVAL;
5788
5789         if (!rdev->ops->disassoc)
5790                 return -EOPNOTSUPP;
5791
5792         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5793             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5794                 return -EOPNOTSUPP;
5795
5796         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5797
5798         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5799         if (reason_code == 0) {
5800                 /* Reason Code 0 is reserved */
5801                 return -EINVAL;
5802         }
5803
5804         if (info->attrs[NL80211_ATTR_IE]) {
5805                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5806                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5807         }
5808
5809         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5810
5811         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5812                                       local_state_change);
5813 }
5814
5815 static bool
5816 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5817                          int mcast_rate[IEEE80211_NUM_BANDS],
5818                          int rateval)
5819 {
5820         struct wiphy *wiphy = &rdev->wiphy;
5821         bool found = false;
5822         int band, i;
5823
5824         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5825                 struct ieee80211_supported_band *sband;
5826
5827                 sband = wiphy->bands[band];
5828                 if (!sband)
5829                         continue;
5830
5831                 for (i = 0; i < sband->n_bitrates; i++) {
5832                         if (sband->bitrates[i].bitrate == rateval) {
5833                                 mcast_rate[band] = i + 1;
5834                                 found = true;
5835                                 break;
5836                         }
5837                 }
5838         }
5839
5840         return found;
5841 }
5842
5843 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5844 {
5845         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5846         struct net_device *dev = info->user_ptr[1];
5847         struct cfg80211_ibss_params ibss;
5848         struct wiphy *wiphy;
5849         struct cfg80211_cached_keys *connkeys = NULL;
5850         int err;
5851
5852         memset(&ibss, 0, sizeof(ibss));
5853
5854         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5855                 return -EINVAL;
5856
5857         if (!info->attrs[NL80211_ATTR_SSID] ||
5858             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5859                 return -EINVAL;
5860
5861         ibss.beacon_interval = 100;
5862
5863         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5864                 ibss.beacon_interval =
5865                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5866                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5867                         return -EINVAL;
5868         }
5869
5870         if (!rdev->ops->join_ibss)
5871                 return -EOPNOTSUPP;
5872
5873         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5874                 return -EOPNOTSUPP;
5875
5876         wiphy = &rdev->wiphy;
5877
5878         if (info->attrs[NL80211_ATTR_MAC]) {
5879                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5880
5881                 if (!is_valid_ether_addr(ibss.bssid))
5882                         return -EINVAL;
5883         }
5884         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5885         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5886
5887         if (info->attrs[NL80211_ATTR_IE]) {
5888                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5889                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5890         }
5891
5892         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5893         if (err)
5894                 return err;
5895
5896         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5897                 return -EINVAL;
5898
5899         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5900                 return -EINVAL;
5901         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5902             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5903                 return -EINVAL;
5904
5905         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5906         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5907
5908         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5909                 u8 *rates =
5910                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5911                 int n_rates =
5912                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5913                 struct ieee80211_supported_band *sband =
5914                         wiphy->bands[ibss.chandef.chan->band];
5915
5916                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5917                                              &ibss.basic_rates);
5918                 if (err)
5919                         return err;
5920         }
5921
5922         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5923             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5924                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5925                 return -EINVAL;
5926
5927         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5928                 bool no_ht = false;
5929
5930                 connkeys = nl80211_parse_connkeys(rdev,
5931                                           info->attrs[NL80211_ATTR_KEYS],
5932                                           &no_ht);
5933                 if (IS_ERR(connkeys))
5934                         return PTR_ERR(connkeys);
5935
5936                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5937                     no_ht) {
5938                         kfree(connkeys);
5939                         return -EINVAL;
5940                 }
5941         }
5942
5943         ibss.control_port =
5944                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5945
5946         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5947         if (err)
5948                 kfree(connkeys);
5949         return err;
5950 }
5951
5952 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5953 {
5954         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5955         struct net_device *dev = info->user_ptr[1];
5956
5957         if (!rdev->ops->leave_ibss)
5958                 return -EOPNOTSUPP;
5959
5960         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5961                 return -EOPNOTSUPP;
5962
5963         return cfg80211_leave_ibss(rdev, dev, false);
5964 }
5965
5966 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5967 {
5968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5969         struct net_device *dev = info->user_ptr[1];
5970         int mcast_rate[IEEE80211_NUM_BANDS];
5971         u32 nla_rate;
5972         int err;
5973
5974         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5975             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5976                 return -EOPNOTSUPP;
5977
5978         if (!rdev->ops->set_mcast_rate)
5979                 return -EOPNOTSUPP;
5980
5981         memset(mcast_rate, 0, sizeof(mcast_rate));
5982
5983         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5984                 return -EINVAL;
5985
5986         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5987         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5988                 return -EINVAL;
5989
5990         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5991
5992         return err;
5993 }
5994
5995
5996 #ifdef CONFIG_NL80211_TESTMODE
5997 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5998         .name = "testmode",
5999 };
6000
6001 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6002 {
6003         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6004         int err;
6005
6006         if (!info->attrs[NL80211_ATTR_TESTDATA])
6007                 return -EINVAL;
6008
6009         err = -EOPNOTSUPP;
6010         if (rdev->ops->testmode_cmd) {
6011                 rdev->testmode_info = info;
6012                 err = rdev_testmode_cmd(rdev,
6013                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6014                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6015                 rdev->testmode_info = NULL;
6016         }
6017
6018         return err;
6019 }
6020
6021 static int nl80211_testmode_dump(struct sk_buff *skb,
6022                                  struct netlink_callback *cb)
6023 {
6024         struct cfg80211_registered_device *rdev;
6025         int err;
6026         long phy_idx;
6027         void *data = NULL;
6028         int data_len = 0;
6029
6030         if (cb->args[0]) {
6031                 /*
6032                  * 0 is a valid index, but not valid for args[0],
6033                  * so we need to offset by 1.
6034                  */
6035                 phy_idx = cb->args[0] - 1;
6036         } else {
6037                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6038                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6039                                   nl80211_policy);
6040                 if (err)
6041                         return err;
6042
6043                 mutex_lock(&cfg80211_mutex);
6044                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6045                                                   nl80211_fam.attrbuf);
6046                 if (IS_ERR(rdev)) {
6047                         mutex_unlock(&cfg80211_mutex);
6048                         return PTR_ERR(rdev);
6049                 }
6050                 phy_idx = rdev->wiphy_idx;
6051                 rdev = NULL;
6052                 mutex_unlock(&cfg80211_mutex);
6053
6054                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6055                         cb->args[1] =
6056                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6057         }
6058
6059         if (cb->args[1]) {
6060                 data = nla_data((void *)cb->args[1]);
6061                 data_len = nla_len((void *)cb->args[1]);
6062         }
6063
6064         mutex_lock(&cfg80211_mutex);
6065         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6066         if (!rdev) {
6067                 mutex_unlock(&cfg80211_mutex);
6068                 return -ENOENT;
6069         }
6070         cfg80211_lock_rdev(rdev);
6071         mutex_unlock(&cfg80211_mutex);
6072
6073         if (!rdev->ops->testmode_dump) {
6074                 err = -EOPNOTSUPP;
6075                 goto out_err;
6076         }
6077
6078         while (1) {
6079                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6080                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6081                                            NL80211_CMD_TESTMODE);
6082                 struct nlattr *tmdata;
6083
6084                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6085                         genlmsg_cancel(skb, hdr);
6086                         break;
6087                 }
6088
6089                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6090                 if (!tmdata) {
6091                         genlmsg_cancel(skb, hdr);
6092                         break;
6093                 }
6094                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6095                 nla_nest_end(skb, tmdata);
6096
6097                 if (err == -ENOBUFS || err == -ENOENT) {
6098                         genlmsg_cancel(skb, hdr);
6099                         break;
6100                 } else if (err) {
6101                         genlmsg_cancel(skb, hdr);
6102                         goto out_err;
6103                 }
6104
6105                 genlmsg_end(skb, hdr);
6106         }
6107
6108         err = skb->len;
6109         /* see above */
6110         cb->args[0] = phy_idx + 1;
6111  out_err:
6112         cfg80211_unlock_rdev(rdev);
6113         return err;
6114 }
6115
6116 static struct sk_buff *
6117 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6118                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6119 {
6120         struct sk_buff *skb;
6121         void *hdr;
6122         struct nlattr *data;
6123
6124         skb = nlmsg_new(approxlen + 100, gfp);
6125         if (!skb)
6126                 return NULL;
6127
6128         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6129         if (!hdr) {
6130                 kfree_skb(skb);
6131                 return NULL;
6132         }
6133
6134         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6135                 goto nla_put_failure;
6136         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6137
6138         ((void **)skb->cb)[0] = rdev;
6139         ((void **)skb->cb)[1] = hdr;
6140         ((void **)skb->cb)[2] = data;
6141
6142         return skb;
6143
6144  nla_put_failure:
6145         kfree_skb(skb);
6146         return NULL;
6147 }
6148
6149 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6150                                                   int approxlen)
6151 {
6152         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6153
6154         if (WARN_ON(!rdev->testmode_info))
6155                 return NULL;
6156
6157         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6158                                 rdev->testmode_info->snd_portid,
6159                                 rdev->testmode_info->snd_seq,
6160                                 GFP_KERNEL);
6161 }
6162 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6163
6164 int cfg80211_testmode_reply(struct sk_buff *skb)
6165 {
6166         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6167         void *hdr = ((void **)skb->cb)[1];
6168         struct nlattr *data = ((void **)skb->cb)[2];
6169
6170         if (WARN_ON(!rdev->testmode_info)) {
6171                 kfree_skb(skb);
6172                 return -EINVAL;
6173         }
6174
6175         nla_nest_end(skb, data);
6176         genlmsg_end(skb, hdr);
6177         return genlmsg_reply(skb, rdev->testmode_info);
6178 }
6179 EXPORT_SYMBOL(cfg80211_testmode_reply);
6180
6181 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6182                                                   int approxlen, gfp_t gfp)
6183 {
6184         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6185
6186         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6187 }
6188 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6189
6190 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6191 {
6192         void *hdr = ((void **)skb->cb)[1];
6193         struct nlattr *data = ((void **)skb->cb)[2];
6194
6195         nla_nest_end(skb, data);
6196         genlmsg_end(skb, hdr);
6197         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6198 }
6199 EXPORT_SYMBOL(cfg80211_testmode_event);
6200 #endif
6201
6202 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6203 {
6204         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6205         struct net_device *dev = info->user_ptr[1];
6206         struct cfg80211_connect_params connect;
6207         struct wiphy *wiphy;
6208         struct cfg80211_cached_keys *connkeys = NULL;
6209         int err;
6210
6211         memset(&connect, 0, sizeof(connect));
6212
6213         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6214                 return -EINVAL;
6215
6216         if (!info->attrs[NL80211_ATTR_SSID] ||
6217             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6218                 return -EINVAL;
6219
6220         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6221                 connect.auth_type =
6222                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6223                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6224                                              NL80211_CMD_CONNECT))
6225                         return -EINVAL;
6226         } else
6227                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6228
6229         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6230
6231         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6232                                       NL80211_MAX_NR_CIPHER_SUITES);
6233         if (err)
6234                 return err;
6235
6236         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6237             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6238                 return -EOPNOTSUPP;
6239
6240         wiphy = &rdev->wiphy;
6241
6242         connect.bg_scan_period = -1;
6243         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6244                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6245                 connect.bg_scan_period =
6246                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6247         }
6248
6249         if (info->attrs[NL80211_ATTR_MAC])
6250                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6251         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6252         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6253
6254         if (info->attrs[NL80211_ATTR_IE]) {
6255                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6256                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6257         }
6258
6259         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6260                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6261                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6262                     connect.mfp != NL80211_MFP_NO)
6263                         return -EINVAL;
6264         } else {
6265                 connect.mfp = NL80211_MFP_NO;
6266         }
6267
6268         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6269                 connect.channel =
6270                         ieee80211_get_channel(wiphy,
6271                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6272                 if (!connect.channel ||
6273                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6274                         return -EINVAL;
6275         }
6276
6277         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6278                 connkeys = nl80211_parse_connkeys(rdev,
6279                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6280                 if (IS_ERR(connkeys))
6281                         return PTR_ERR(connkeys);
6282         }
6283
6284         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6285                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6286
6287         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6288                 memcpy(&connect.ht_capa_mask,
6289                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6290                        sizeof(connect.ht_capa_mask));
6291
6292         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6293                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6294                         kfree(connkeys);
6295                         return -EINVAL;
6296                 }
6297                 memcpy(&connect.ht_capa,
6298                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6299                        sizeof(connect.ht_capa));
6300         }
6301
6302         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6303         if (err)
6304                 kfree(connkeys);
6305         return err;
6306 }
6307
6308 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6309 {
6310         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6311         struct net_device *dev = info->user_ptr[1];
6312         u16 reason;
6313
6314         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6315                 reason = WLAN_REASON_DEAUTH_LEAVING;
6316         else
6317                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6318
6319         if (reason == 0)
6320                 return -EINVAL;
6321
6322         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6323             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6324                 return -EOPNOTSUPP;
6325
6326         return cfg80211_disconnect(rdev, dev, reason, true);
6327 }
6328
6329 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6330 {
6331         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6332         struct net *net;
6333         int err;
6334         u32 pid;
6335
6336         if (!info->attrs[NL80211_ATTR_PID])
6337                 return -EINVAL;
6338
6339         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6340
6341         net = get_net_ns_by_pid(pid);
6342         if (IS_ERR(net))
6343                 return PTR_ERR(net);
6344
6345         err = 0;
6346
6347         /* check if anything to do */
6348         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6349                 err = cfg80211_switch_netns(rdev, net);
6350
6351         put_net(net);
6352         return err;
6353 }
6354
6355 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6356 {
6357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6358         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6359                         struct cfg80211_pmksa *pmksa) = NULL;
6360         struct net_device *dev = info->user_ptr[1];
6361         struct cfg80211_pmksa pmksa;
6362
6363         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6364
6365         if (!info->attrs[NL80211_ATTR_MAC])
6366                 return -EINVAL;
6367
6368         if (!info->attrs[NL80211_ATTR_PMKID])
6369                 return -EINVAL;
6370
6371         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6372         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6373
6374         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6375             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6376                 return -EOPNOTSUPP;
6377
6378         switch (info->genlhdr->cmd) {
6379         case NL80211_CMD_SET_PMKSA:
6380                 rdev_ops = rdev->ops->set_pmksa;
6381                 break;
6382         case NL80211_CMD_DEL_PMKSA:
6383                 rdev_ops = rdev->ops->del_pmksa;
6384                 break;
6385         default:
6386                 WARN_ON(1);
6387                 break;
6388         }
6389
6390         if (!rdev_ops)
6391                 return -EOPNOTSUPP;
6392
6393         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6394 }
6395
6396 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6397 {
6398         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6399         struct net_device *dev = info->user_ptr[1];
6400
6401         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6402             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6403                 return -EOPNOTSUPP;
6404
6405         if (!rdev->ops->flush_pmksa)
6406                 return -EOPNOTSUPP;
6407
6408         return rdev_flush_pmksa(rdev, dev);
6409 }
6410
6411 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6412 {
6413         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6414         struct net_device *dev = info->user_ptr[1];
6415         u8 action_code, dialog_token;
6416         u16 status_code;
6417         u8 *peer;
6418
6419         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6420             !rdev->ops->tdls_mgmt)
6421                 return -EOPNOTSUPP;
6422
6423         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6424             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6425             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6426             !info->attrs[NL80211_ATTR_IE] ||
6427             !info->attrs[NL80211_ATTR_MAC])
6428                 return -EINVAL;
6429
6430         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6431         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6432         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6433         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6434
6435         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6436                               dialog_token, status_code,
6437                               nla_data(info->attrs[NL80211_ATTR_IE]),
6438                               nla_len(info->attrs[NL80211_ATTR_IE]));
6439 }
6440
6441 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6442 {
6443         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6444         struct net_device *dev = info->user_ptr[1];
6445         enum nl80211_tdls_operation operation;
6446         u8 *peer;
6447
6448         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6449             !rdev->ops->tdls_oper)
6450                 return -EOPNOTSUPP;
6451
6452         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6453             !info->attrs[NL80211_ATTR_MAC])
6454                 return -EINVAL;
6455
6456         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6457         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6458
6459         return rdev_tdls_oper(rdev, dev, peer, operation);
6460 }
6461
6462 static int nl80211_remain_on_channel(struct sk_buff *skb,
6463                                      struct genl_info *info)
6464 {
6465         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6466         struct wireless_dev *wdev = info->user_ptr[1];
6467         struct cfg80211_chan_def chandef;
6468         struct sk_buff *msg;
6469         void *hdr;
6470         u64 cookie;
6471         u32 duration;
6472         int err;
6473
6474         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6475             !info->attrs[NL80211_ATTR_DURATION])
6476                 return -EINVAL;
6477
6478         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6479
6480         if (!rdev->ops->remain_on_channel ||
6481             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6482                 return -EOPNOTSUPP;
6483
6484         /*
6485          * We should be on that channel for at least a minimum amount of
6486          * time (10ms) but no longer than the driver supports.
6487          */
6488         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6489             duration > rdev->wiphy.max_remain_on_channel_duration)
6490                 return -EINVAL;
6491
6492         err = nl80211_parse_chandef(rdev, info, &chandef);
6493         if (err)
6494                 return err;
6495
6496         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6497         if (!msg)
6498                 return -ENOMEM;
6499
6500         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6501                              NL80211_CMD_REMAIN_ON_CHANNEL);
6502
6503         if (IS_ERR(hdr)) {
6504                 err = PTR_ERR(hdr);
6505                 goto free_msg;
6506         }
6507
6508         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6509                                      duration, &cookie);
6510
6511         if (err)
6512                 goto free_msg;
6513
6514         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6515                 goto nla_put_failure;
6516
6517         genlmsg_end(msg, hdr);
6518
6519         return genlmsg_reply(msg, info);
6520
6521  nla_put_failure:
6522         err = -ENOBUFS;
6523  free_msg:
6524         nlmsg_free(msg);
6525         return err;
6526 }
6527
6528 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6529                                             struct genl_info *info)
6530 {
6531         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6532         struct wireless_dev *wdev = info->user_ptr[1];
6533         u64 cookie;
6534
6535         if (!info->attrs[NL80211_ATTR_COOKIE])
6536                 return -EINVAL;
6537
6538         if (!rdev->ops->cancel_remain_on_channel)
6539                 return -EOPNOTSUPP;
6540
6541         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6542
6543         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6544 }
6545
6546 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6547                            u8 *rates, u8 rates_len)
6548 {
6549         u8 i;
6550         u32 mask = 0;
6551
6552         for (i = 0; i < rates_len; i++) {
6553                 int rate = (rates[i] & 0x7f) * 5;
6554                 int ridx;
6555                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6556                         struct ieee80211_rate *srate =
6557                                 &sband->bitrates[ridx];
6558                         if (rate == srate->bitrate) {
6559                                 mask |= 1 << ridx;
6560                                 break;
6561                         }
6562                 }
6563                 if (ridx == sband->n_bitrates)
6564                         return 0; /* rate not found */
6565         }
6566
6567         return mask;
6568 }
6569
6570 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6571                                u8 *rates, u8 rates_len,
6572                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6573 {
6574         u8 i;
6575
6576         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6577
6578         for (i = 0; i < rates_len; i++) {
6579                 int ridx, rbit;
6580
6581                 ridx = rates[i] / 8;
6582                 rbit = BIT(rates[i] % 8);
6583
6584                 /* check validity */
6585                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6586                         return false;
6587
6588                 /* check availability */
6589                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6590                         mcs[ridx] |= rbit;
6591                 else
6592                         return false;
6593         }
6594
6595         return true;
6596 }
6597
6598 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6599         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6600                                     .len = NL80211_MAX_SUPP_RATES },
6601         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6602                                  .len = NL80211_MAX_SUPP_HT_RATES },
6603 };
6604
6605 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6606                                        struct genl_info *info)
6607 {
6608         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6609         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6610         struct cfg80211_bitrate_mask mask;
6611         int rem, i;
6612         struct net_device *dev = info->user_ptr[1];
6613         struct nlattr *tx_rates;
6614         struct ieee80211_supported_band *sband;
6615
6616         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6617                 return -EINVAL;
6618
6619         if (!rdev->ops->set_bitrate_mask)
6620                 return -EOPNOTSUPP;
6621
6622         memset(&mask, 0, sizeof(mask));
6623         /* Default to all rates enabled */
6624         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6625                 sband = rdev->wiphy.bands[i];
6626                 mask.control[i].legacy =
6627                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6628                 if (sband)
6629                         memcpy(mask.control[i].mcs,
6630                                sband->ht_cap.mcs.rx_mask,
6631                                sizeof(mask.control[i].mcs));
6632                 else
6633                         memset(mask.control[i].mcs, 0,
6634                                sizeof(mask.control[i].mcs));
6635         }
6636
6637         /*
6638          * The nested attribute uses enum nl80211_band as the index. This maps
6639          * directly to the enum ieee80211_band values used in cfg80211.
6640          */
6641         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6642         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6643         {
6644                 enum ieee80211_band band = nla_type(tx_rates);
6645                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6646                         return -EINVAL;
6647                 sband = rdev->wiphy.bands[band];
6648                 if (sband == NULL)
6649                         return -EINVAL;
6650                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6651                           nla_len(tx_rates), nl80211_txattr_policy);
6652                 if (tb[NL80211_TXRATE_LEGACY]) {
6653                         mask.control[band].legacy = rateset_to_mask(
6654                                 sband,
6655                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6656                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6657                         if ((mask.control[band].legacy == 0) &&
6658                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6659                                 return -EINVAL;
6660                 }
6661                 if (tb[NL80211_TXRATE_MCS]) {
6662                         if (!ht_rateset_to_mask(
6663                                         sband,
6664                                         nla_data(tb[NL80211_TXRATE_MCS]),
6665                                         nla_len(tb[NL80211_TXRATE_MCS]),
6666                                         mask.control[band].mcs))
6667                                 return -EINVAL;
6668                 }
6669
6670                 if (mask.control[band].legacy == 0) {
6671                         /* don't allow empty legacy rates if HT
6672                          * is not even supported. */
6673                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6674                                 return -EINVAL;
6675
6676                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6677                                 if (mask.control[band].mcs[i])
6678                                         break;
6679
6680                         /* legacy and mcs rates may not be both empty */
6681                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6682                                 return -EINVAL;
6683                 }
6684         }
6685
6686         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6687 }
6688
6689 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6690 {
6691         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6692         struct wireless_dev *wdev = info->user_ptr[1];
6693         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6694
6695         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6696                 return -EINVAL;
6697
6698         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6699                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6700
6701         switch (wdev->iftype) {
6702         case NL80211_IFTYPE_STATION:
6703         case NL80211_IFTYPE_ADHOC:
6704         case NL80211_IFTYPE_P2P_CLIENT:
6705         case NL80211_IFTYPE_AP:
6706         case NL80211_IFTYPE_AP_VLAN:
6707         case NL80211_IFTYPE_MESH_POINT:
6708         case NL80211_IFTYPE_P2P_GO:
6709         case NL80211_IFTYPE_P2P_DEVICE:
6710                 break;
6711         default:
6712                 return -EOPNOTSUPP;
6713         }
6714
6715         /* not much point in registering if we can't reply */
6716         if (!rdev->ops->mgmt_tx)
6717                 return -EOPNOTSUPP;
6718
6719         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6720                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6721                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6722 }
6723
6724 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6725 {
6726         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6727         struct wireless_dev *wdev = info->user_ptr[1];
6728         struct cfg80211_chan_def chandef;
6729         int err;
6730         void *hdr = NULL;
6731         u64 cookie;
6732         struct sk_buff *msg = NULL;
6733         unsigned int wait = 0;
6734         bool offchan, no_cck, dont_wait_for_ack;
6735
6736         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6737
6738         if (!info->attrs[NL80211_ATTR_FRAME])
6739                 return -EINVAL;
6740
6741         if (!rdev->ops->mgmt_tx)
6742                 return -EOPNOTSUPP;
6743
6744         switch (wdev->iftype) {
6745         case NL80211_IFTYPE_STATION:
6746         case NL80211_IFTYPE_ADHOC:
6747         case NL80211_IFTYPE_P2P_CLIENT:
6748         case NL80211_IFTYPE_AP:
6749         case NL80211_IFTYPE_AP_VLAN:
6750         case NL80211_IFTYPE_MESH_POINT:
6751         case NL80211_IFTYPE_P2P_GO:
6752         case NL80211_IFTYPE_P2P_DEVICE:
6753                 break;
6754         default:
6755                 return -EOPNOTSUPP;
6756         }
6757
6758         if (info->attrs[NL80211_ATTR_DURATION]) {
6759                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6760                         return -EINVAL;
6761                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6762
6763                 /*
6764                  * We should wait on the channel for at least a minimum amount
6765                  * of time (10ms) but no longer than the driver supports.
6766                  */
6767                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6768                     wait > rdev->wiphy.max_remain_on_channel_duration)
6769                         return -EINVAL;
6770
6771         }
6772
6773         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6774
6775         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6776                 return -EINVAL;
6777
6778         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6779
6780         err = nl80211_parse_chandef(rdev, info, &chandef);
6781         if (err)
6782                 return err;
6783
6784         if (!dont_wait_for_ack) {
6785                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6786                 if (!msg)
6787                         return -ENOMEM;
6788
6789                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6790                                      NL80211_CMD_FRAME);
6791
6792                 if (IS_ERR(hdr)) {
6793                         err = PTR_ERR(hdr);
6794                         goto free_msg;
6795                 }
6796         }
6797
6798         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6799                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6800                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6801                                     no_cck, dont_wait_for_ack, &cookie);
6802         if (err)
6803                 goto free_msg;
6804
6805         if (msg) {
6806                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6807                         goto nla_put_failure;
6808
6809                 genlmsg_end(msg, hdr);
6810                 return genlmsg_reply(msg, info);
6811         }
6812
6813         return 0;
6814
6815  nla_put_failure:
6816         err = -ENOBUFS;
6817  free_msg:
6818         nlmsg_free(msg);
6819         return err;
6820 }
6821
6822 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6823 {
6824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6825         struct wireless_dev *wdev = info->user_ptr[1];
6826         u64 cookie;
6827
6828         if (!info->attrs[NL80211_ATTR_COOKIE])
6829                 return -EINVAL;
6830
6831         if (!rdev->ops->mgmt_tx_cancel_wait)
6832                 return -EOPNOTSUPP;
6833
6834         switch (wdev->iftype) {
6835         case NL80211_IFTYPE_STATION:
6836         case NL80211_IFTYPE_ADHOC:
6837         case NL80211_IFTYPE_P2P_CLIENT:
6838         case NL80211_IFTYPE_AP:
6839         case NL80211_IFTYPE_AP_VLAN:
6840         case NL80211_IFTYPE_P2P_GO:
6841         case NL80211_IFTYPE_P2P_DEVICE:
6842                 break;
6843         default:
6844                 return -EOPNOTSUPP;
6845         }
6846
6847         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6848
6849         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6850 }
6851
6852 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6853 {
6854         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6855         struct wireless_dev *wdev;
6856         struct net_device *dev = info->user_ptr[1];
6857         u8 ps_state;
6858         bool state;
6859         int err;
6860
6861         if (!info->attrs[NL80211_ATTR_PS_STATE])
6862                 return -EINVAL;
6863
6864         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6865
6866         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6867                 return -EINVAL;
6868
6869         wdev = dev->ieee80211_ptr;
6870
6871         if (!rdev->ops->set_power_mgmt)
6872                 return -EOPNOTSUPP;
6873
6874         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6875
6876         if (state == wdev->ps)
6877                 return 0;
6878
6879         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6880         if (!err)
6881                 wdev->ps = state;
6882         return err;
6883 }
6884
6885 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6886 {
6887         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6888         enum nl80211_ps_state ps_state;
6889         struct wireless_dev *wdev;
6890         struct net_device *dev = info->user_ptr[1];
6891         struct sk_buff *msg;
6892         void *hdr;
6893         int err;
6894
6895         wdev = dev->ieee80211_ptr;
6896
6897         if (!rdev->ops->set_power_mgmt)
6898                 return -EOPNOTSUPP;
6899
6900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6901         if (!msg)
6902                 return -ENOMEM;
6903
6904         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6905                              NL80211_CMD_GET_POWER_SAVE);
6906         if (!hdr) {
6907                 err = -ENOBUFS;
6908                 goto free_msg;
6909         }
6910
6911         if (wdev->ps)
6912                 ps_state = NL80211_PS_ENABLED;
6913         else
6914                 ps_state = NL80211_PS_DISABLED;
6915
6916         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6917                 goto nla_put_failure;
6918
6919         genlmsg_end(msg, hdr);
6920         return genlmsg_reply(msg, info);
6921
6922  nla_put_failure:
6923         err = -ENOBUFS;
6924  free_msg:
6925         nlmsg_free(msg);
6926         return err;
6927 }
6928
6929 static struct nla_policy
6930 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6931         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6932         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6933         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6934         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6935         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6936         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6937 };
6938
6939 static int nl80211_set_cqm_txe(struct genl_info *info,
6940                                u32 rate, u32 pkts, u32 intvl)
6941 {
6942         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6943         struct wireless_dev *wdev;
6944         struct net_device *dev = info->user_ptr[1];
6945
6946         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6947                 return -EINVAL;
6948
6949         wdev = dev->ieee80211_ptr;
6950
6951         if (!rdev->ops->set_cqm_txe_config)
6952                 return -EOPNOTSUPP;
6953
6954         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6955             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6956                 return -EOPNOTSUPP;
6957
6958         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6959 }
6960
6961 static int nl80211_set_cqm_rssi(struct genl_info *info,
6962                                 s32 threshold, u32 hysteresis)
6963 {
6964         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6965         struct wireless_dev *wdev;
6966         struct net_device *dev = info->user_ptr[1];
6967
6968         if (threshold > 0)
6969                 return -EINVAL;
6970
6971         wdev = dev->ieee80211_ptr;
6972
6973         if (!rdev->ops->set_cqm_rssi_config)
6974                 return -EOPNOTSUPP;
6975
6976         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6977             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6978                 return -EOPNOTSUPP;
6979
6980         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6981 }
6982
6983 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6984 {
6985         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6986         struct nlattr *cqm;
6987         int err;
6988
6989         cqm = info->attrs[NL80211_ATTR_CQM];
6990         if (!cqm) {
6991                 err = -EINVAL;
6992                 goto out;
6993         }
6994
6995         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6996                                nl80211_attr_cqm_policy);
6997         if (err)
6998                 goto out;
6999
7000         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7001             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7002                 s32 threshold;
7003                 u32 hysteresis;
7004                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7005                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7006                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7007         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7008                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7009                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7010                 u32 rate, pkts, intvl;
7011                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7012                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7013                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7014                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7015         } else
7016                 err = -EINVAL;
7017
7018 out:
7019         return err;
7020 }
7021
7022 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7023 {
7024         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7025         struct net_device *dev = info->user_ptr[1];
7026         struct mesh_config cfg;
7027         struct mesh_setup setup;
7028         int err;
7029
7030         /* start with default */
7031         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7032         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7033
7034         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7035                 /* and parse parameters if given */
7036                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7037                 if (err)
7038                         return err;
7039         }
7040
7041         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7042             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7043                 return -EINVAL;
7044
7045         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7046         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7047
7048         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7049             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7050                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7051                         return -EINVAL;
7052
7053         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7054                 setup.beacon_interval =
7055                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7056                 if (setup.beacon_interval < 10 ||
7057                     setup.beacon_interval > 10000)
7058                         return -EINVAL;
7059         }
7060
7061         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7062                 setup.dtim_period =
7063                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7064                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7065                         return -EINVAL;
7066         }
7067
7068         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7069                 /* parse additional setup parameters if given */
7070                 err = nl80211_parse_mesh_setup(info, &setup);
7071                 if (err)
7072                         return err;
7073         }
7074
7075         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7076                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7077                 if (err)
7078                         return err;
7079         } else {
7080                 /* cfg80211_join_mesh() will sort it out */
7081                 setup.chandef.chan = NULL;
7082         }
7083
7084         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7085 }
7086
7087 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7088 {
7089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7090         struct net_device *dev = info->user_ptr[1];
7091
7092         return cfg80211_leave_mesh(rdev, dev);
7093 }
7094
7095 #ifdef CONFIG_PM
7096 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7097                                         struct cfg80211_registered_device *rdev)
7098 {
7099         struct nlattr *nl_pats, *nl_pat;
7100         int i, pat_len;
7101
7102         if (!rdev->wowlan->n_patterns)
7103                 return 0;
7104
7105         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7106         if (!nl_pats)
7107                 return -ENOBUFS;
7108
7109         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7110                 nl_pat = nla_nest_start(msg, i + 1);
7111                 if (!nl_pat)
7112                         return -ENOBUFS;
7113                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7114                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7115                             DIV_ROUND_UP(pat_len, 8),
7116                             rdev->wowlan->patterns[i].mask) ||
7117                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7118                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7119                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7120                                 rdev->wowlan->patterns[i].pkt_offset))
7121                         return -ENOBUFS;
7122                 nla_nest_end(msg, nl_pat);
7123         }
7124         nla_nest_end(msg, nl_pats);
7125
7126         return 0;
7127 }
7128
7129 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7130                                    struct cfg80211_wowlan_tcp *tcp)
7131 {
7132         struct nlattr *nl_tcp;
7133
7134         if (!tcp)
7135                 return 0;
7136
7137         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7138         if (!nl_tcp)
7139                 return -ENOBUFS;
7140
7141         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7142             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7143             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7144             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7145             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7146             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7147                     tcp->payload_len, tcp->payload) ||
7148             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7149                         tcp->data_interval) ||
7150             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7151                     tcp->wake_len, tcp->wake_data) ||
7152             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7153                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7154                 return -ENOBUFS;
7155
7156         if (tcp->payload_seq.len &&
7157             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7158                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7159                 return -ENOBUFS;
7160
7161         if (tcp->payload_tok.len &&
7162             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7163                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7164                     &tcp->payload_tok))
7165                 return -ENOBUFS;
7166
7167         return 0;
7168 }
7169
7170 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7171 {
7172         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7173         struct sk_buff *msg;
7174         void *hdr;
7175         u32 size = NLMSG_DEFAULT_SIZE;
7176
7177         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7178             !rdev->wiphy.wowlan.tcp)
7179                 return -EOPNOTSUPP;
7180
7181         if (rdev->wowlan && rdev->wowlan->tcp) {
7182                 /* adjust size to have room for all the data */
7183                 size += rdev->wowlan->tcp->tokens_size +
7184                         rdev->wowlan->tcp->payload_len +
7185                         rdev->wowlan->tcp->wake_len +
7186                         rdev->wowlan->tcp->wake_len / 8;
7187         }
7188
7189         msg = nlmsg_new(size, GFP_KERNEL);
7190         if (!msg)
7191                 return -ENOMEM;
7192
7193         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7194                              NL80211_CMD_GET_WOWLAN);
7195         if (!hdr)
7196                 goto nla_put_failure;
7197
7198         if (rdev->wowlan) {
7199                 struct nlattr *nl_wowlan;
7200
7201                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7202                 if (!nl_wowlan)
7203                         goto nla_put_failure;
7204
7205                 if ((rdev->wowlan->any &&
7206                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7207                     (rdev->wowlan->disconnect &&
7208                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7209                     (rdev->wowlan->magic_pkt &&
7210                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7211                     (rdev->wowlan->gtk_rekey_failure &&
7212                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7213                     (rdev->wowlan->eap_identity_req &&
7214                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7215                     (rdev->wowlan->four_way_handshake &&
7216                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7217                     (rdev->wowlan->rfkill_release &&
7218                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7219                         goto nla_put_failure;
7220
7221                 if (nl80211_send_wowlan_patterns(msg, rdev))
7222                         goto nla_put_failure;
7223
7224                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7225                         goto nla_put_failure;
7226
7227                 nla_nest_end(msg, nl_wowlan);
7228         }
7229
7230         genlmsg_end(msg, hdr);
7231         return genlmsg_reply(msg, info);
7232
7233 nla_put_failure:
7234         nlmsg_free(msg);
7235         return -ENOBUFS;
7236 }
7237
7238 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7239                                     struct nlattr *attr,
7240                                     struct cfg80211_wowlan *trig)
7241 {
7242         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7243         struct cfg80211_wowlan_tcp *cfg;
7244         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7245         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7246         u32 size;
7247         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7248         int err, port;
7249
7250         if (!rdev->wiphy.wowlan.tcp)
7251                 return -EINVAL;
7252
7253         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7254                         nla_data(attr), nla_len(attr),
7255                         nl80211_wowlan_tcp_policy);
7256         if (err)
7257                 return err;
7258
7259         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7260             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7261             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7262             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7263             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7264             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7265             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7266             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7267                 return -EINVAL;
7268
7269         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7270         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7271                 return -EINVAL;
7272
7273         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7274                         rdev->wiphy.wowlan.tcp->data_interval_max)
7275                 return -EINVAL;
7276
7277         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7278         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7279                 return -EINVAL;
7280
7281         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7282         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7283                 return -EINVAL;
7284
7285         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7286                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7287
7288                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7289                 tokens_size = tokln - sizeof(*tok);
7290
7291                 if (!tok->len || tokens_size % tok->len)
7292                         return -EINVAL;
7293                 if (!rdev->wiphy.wowlan.tcp->tok)
7294                         return -EINVAL;
7295                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7296                         return -EINVAL;
7297                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7298                         return -EINVAL;
7299                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7300                         return -EINVAL;
7301                 if (tok->offset + tok->len > data_size)
7302                         return -EINVAL;
7303         }
7304
7305         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7306                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7307                 if (!rdev->wiphy.wowlan.tcp->seq)
7308                         return -EINVAL;
7309                 if (seq->len == 0 || seq->len > 4)
7310                         return -EINVAL;
7311                 if (seq->len + seq->offset > data_size)
7312                         return -EINVAL;
7313         }
7314
7315         size = sizeof(*cfg);
7316         size += data_size;
7317         size += wake_size + wake_mask_size;
7318         size += tokens_size;
7319
7320         cfg = kzalloc(size, GFP_KERNEL);
7321         if (!cfg)
7322                 return -ENOMEM;
7323         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7324         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7325         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7326                ETH_ALEN);
7327         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7328                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7329         else
7330                 port = 0;
7331 #ifdef CONFIG_INET
7332         /* allocate a socket and port for it and use it */
7333         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7334                             IPPROTO_TCP, &cfg->sock, 1);
7335         if (err) {
7336                 kfree(cfg);
7337                 return err;
7338         }
7339         if (inet_csk_get_port(cfg->sock->sk, port)) {
7340                 sock_release(cfg->sock);
7341                 kfree(cfg);
7342                 return -EADDRINUSE;
7343         }
7344         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7345 #else
7346         if (!port) {
7347                 kfree(cfg);
7348                 return -EINVAL;
7349         }
7350         cfg->src_port = port;
7351 #endif
7352
7353         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7354         cfg->payload_len = data_size;
7355         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7356         memcpy((void *)cfg->payload,
7357                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7358                data_size);
7359         if (seq)
7360                 cfg->payload_seq = *seq;
7361         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7362         cfg->wake_len = wake_size;
7363         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7364         memcpy((void *)cfg->wake_data,
7365                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7366                wake_size);
7367         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7368                          data_size + wake_size;
7369         memcpy((void *)cfg->wake_mask,
7370                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7371                wake_mask_size);
7372         if (tok) {
7373                 cfg->tokens_size = tokens_size;
7374                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7375         }
7376
7377         trig->tcp = cfg;
7378
7379         return 0;
7380 }
7381
7382 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7383 {
7384         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7385         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7386         struct cfg80211_wowlan new_triggers = {};
7387         struct cfg80211_wowlan *ntrig;
7388         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7389         int err, i;
7390         bool prev_enabled = rdev->wowlan;
7391
7392         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7393             !rdev->wiphy.wowlan.tcp)
7394                 return -EOPNOTSUPP;
7395
7396         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7397                 cfg80211_rdev_free_wowlan(rdev);
7398                 rdev->wowlan = NULL;
7399                 goto set_wakeup;
7400         }
7401
7402         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7403                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7404                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7405                         nl80211_wowlan_policy);
7406         if (err)
7407                 return err;
7408
7409         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7410                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7411                         return -EINVAL;
7412                 new_triggers.any = true;
7413         }
7414
7415         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7416                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7417                         return -EINVAL;
7418                 new_triggers.disconnect = true;
7419         }
7420
7421         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7422                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7423                         return -EINVAL;
7424                 new_triggers.magic_pkt = true;
7425         }
7426
7427         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7428                 return -EINVAL;
7429
7430         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7431                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7432                         return -EINVAL;
7433                 new_triggers.gtk_rekey_failure = true;
7434         }
7435
7436         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7437                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7438                         return -EINVAL;
7439                 new_triggers.eap_identity_req = true;
7440         }
7441
7442         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7443                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7444                         return -EINVAL;
7445                 new_triggers.four_way_handshake = true;
7446         }
7447
7448         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7449                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7450                         return -EINVAL;
7451                 new_triggers.rfkill_release = true;
7452         }
7453
7454         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7455                 struct nlattr *pat;
7456                 int n_patterns = 0;
7457                 int rem, pat_len, mask_len, pkt_offset;
7458                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7459
7460                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7461                                     rem)
7462                         n_patterns++;
7463                 if (n_patterns > wowlan->n_patterns)
7464                         return -EINVAL;
7465
7466                 new_triggers.patterns = kcalloc(n_patterns,
7467                                                 sizeof(new_triggers.patterns[0]),
7468                                                 GFP_KERNEL);
7469                 if (!new_triggers.patterns)
7470                         return -ENOMEM;
7471
7472                 new_triggers.n_patterns = n_patterns;
7473                 i = 0;
7474
7475                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7476                                     rem) {
7477                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7478                                   nla_data(pat), nla_len(pat), NULL);
7479                         err = -EINVAL;
7480                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7481                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7482                                 goto error;
7483                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7484                         mask_len = DIV_ROUND_UP(pat_len, 8);
7485                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7486                             mask_len)
7487                                 goto error;
7488                         if (pat_len > wowlan->pattern_max_len ||
7489                             pat_len < wowlan->pattern_min_len)
7490                                 goto error;
7491
7492                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7493                                 pkt_offset = 0;
7494                         else
7495                                 pkt_offset = nla_get_u32(
7496                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7497                         if (pkt_offset > wowlan->max_pkt_offset)
7498                                 goto error;
7499                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7500
7501                         new_triggers.patterns[i].mask =
7502                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7503                         if (!new_triggers.patterns[i].mask) {
7504                                 err = -ENOMEM;
7505                                 goto error;
7506                         }
7507                         new_triggers.patterns[i].pattern =
7508                                 new_triggers.patterns[i].mask + mask_len;
7509                         memcpy(new_triggers.patterns[i].mask,
7510                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7511                                mask_len);
7512                         new_triggers.patterns[i].pattern_len = pat_len;
7513                         memcpy(new_triggers.patterns[i].pattern,
7514                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7515                                pat_len);
7516                         i++;
7517                 }
7518         }
7519
7520         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7521                 err = nl80211_parse_wowlan_tcp(
7522                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7523                         &new_triggers);
7524                 if (err)
7525                         goto error;
7526         }
7527
7528         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7529         if (!ntrig) {
7530                 err = -ENOMEM;
7531                 goto error;
7532         }
7533         cfg80211_rdev_free_wowlan(rdev);
7534         rdev->wowlan = ntrig;
7535
7536  set_wakeup:
7537         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7538                 rdev_set_wakeup(rdev, rdev->wowlan);
7539
7540         return 0;
7541  error:
7542         for (i = 0; i < new_triggers.n_patterns; i++)
7543                 kfree(new_triggers.patterns[i].mask);
7544         kfree(new_triggers.patterns);
7545         if (new_triggers.tcp && new_triggers.tcp->sock)
7546                 sock_release(new_triggers.tcp->sock);
7547         kfree(new_triggers.tcp);
7548         return err;
7549 }
7550 #endif
7551
7552 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7553 {
7554         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7555         struct net_device *dev = info->user_ptr[1];
7556         struct wireless_dev *wdev = dev->ieee80211_ptr;
7557         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7558         struct cfg80211_gtk_rekey_data rekey_data;
7559         int err;
7560
7561         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7562                 return -EINVAL;
7563
7564         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7565                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7566                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7567                         nl80211_rekey_policy);
7568         if (err)
7569                 return err;
7570
7571         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7572                 return -ERANGE;
7573         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7574                 return -ERANGE;
7575         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7576                 return -ERANGE;
7577
7578         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7579                NL80211_KEK_LEN);
7580         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7581                NL80211_KCK_LEN);
7582         memcpy(rekey_data.replay_ctr,
7583                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7584                NL80211_REPLAY_CTR_LEN);
7585
7586         wdev_lock(wdev);
7587         if (!wdev->current_bss) {
7588                 err = -ENOTCONN;
7589                 goto out;
7590         }
7591
7592         if (!rdev->ops->set_rekey_data) {
7593                 err = -EOPNOTSUPP;
7594                 goto out;
7595         }
7596
7597         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7598  out:
7599         wdev_unlock(wdev);
7600         return err;
7601 }
7602
7603 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
7604                                              struct genl_info *info)
7605 {
7606         struct net_device *dev = info->user_ptr[1];
7607         struct wireless_dev *wdev = dev->ieee80211_ptr;
7608
7609         if (wdev->iftype != NL80211_IFTYPE_AP &&
7610             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7611                 return -EINVAL;
7612
7613         if (wdev->ap_unexpected_nlportid)
7614                 return -EBUSY;
7615
7616         wdev->ap_unexpected_nlportid = info->snd_portid;
7617         return 0;
7618 }
7619
7620 static int nl80211_probe_client(struct sk_buff *skb,
7621                                 struct genl_info *info)
7622 {
7623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7624         struct net_device *dev = info->user_ptr[1];
7625         struct wireless_dev *wdev = dev->ieee80211_ptr;
7626         struct sk_buff *msg;
7627         void *hdr;
7628         const u8 *addr;
7629         u64 cookie;
7630         int err;
7631
7632         if (wdev->iftype != NL80211_IFTYPE_AP &&
7633             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7634                 return -EOPNOTSUPP;
7635
7636         if (!info->attrs[NL80211_ATTR_MAC])
7637                 return -EINVAL;
7638
7639         if (!rdev->ops->probe_client)
7640                 return -EOPNOTSUPP;
7641
7642         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7643         if (!msg)
7644                 return -ENOMEM;
7645
7646         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7647                              NL80211_CMD_PROBE_CLIENT);
7648
7649         if (IS_ERR(hdr)) {
7650                 err = PTR_ERR(hdr);
7651                 goto free_msg;
7652         }
7653
7654         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7655
7656         err = rdev_probe_client(rdev, dev, addr, &cookie);
7657         if (err)
7658                 goto free_msg;
7659
7660         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7661                 goto nla_put_failure;
7662
7663         genlmsg_end(msg, hdr);
7664
7665         return genlmsg_reply(msg, info);
7666
7667  nla_put_failure:
7668         err = -ENOBUFS;
7669  free_msg:
7670         nlmsg_free(msg);
7671         return err;
7672 }
7673
7674 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7675 {
7676         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7677         struct cfg80211_beacon_registration *reg, *nreg;
7678         int rv;
7679
7680         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7681                 return -EOPNOTSUPP;
7682
7683         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7684         if (!nreg)
7685                 return -ENOMEM;
7686
7687         /* First, check if already registered. */
7688         spin_lock_bh(&rdev->beacon_registrations_lock);
7689         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7690                 if (reg->nlportid == info->snd_portid) {
7691                         rv = -EALREADY;
7692                         goto out_err;
7693                 }
7694         }
7695         /* Add it to the list */
7696         nreg->nlportid = info->snd_portid;
7697         list_add(&nreg->list, &rdev->beacon_registrations);
7698
7699         spin_unlock_bh(&rdev->beacon_registrations_lock);
7700
7701         return 0;
7702 out_err:
7703         spin_unlock_bh(&rdev->beacon_registrations_lock);
7704         kfree(nreg);
7705         return rv;
7706 }
7707
7708 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7709 {
7710         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7711         struct wireless_dev *wdev = info->user_ptr[1];
7712         int err;
7713
7714         if (!rdev->ops->start_p2p_device)
7715                 return -EOPNOTSUPP;
7716
7717         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7718                 return -EOPNOTSUPP;
7719
7720         if (wdev->p2p_started)
7721                 return 0;
7722
7723         mutex_lock(&rdev->devlist_mtx);
7724         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7725         mutex_unlock(&rdev->devlist_mtx);
7726         if (err)
7727                 return err;
7728
7729         err = rdev_start_p2p_device(rdev, wdev);
7730         if (err)
7731                 return err;
7732
7733         wdev->p2p_started = true;
7734         mutex_lock(&rdev->devlist_mtx);
7735         rdev->opencount++;
7736         mutex_unlock(&rdev->devlist_mtx);
7737
7738         return 0;
7739 }
7740
7741 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7742 {
7743         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7744         struct wireless_dev *wdev = info->user_ptr[1];
7745
7746         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7747                 return -EOPNOTSUPP;
7748
7749         if (!rdev->ops->stop_p2p_device)
7750                 return -EOPNOTSUPP;
7751
7752         if (!wdev->p2p_started)
7753                 return 0;
7754
7755         rdev_stop_p2p_device(rdev, wdev);
7756         wdev->p2p_started = false;
7757
7758         mutex_lock(&rdev->devlist_mtx);
7759         rdev->opencount--;
7760         mutex_unlock(&rdev->devlist_mtx);
7761
7762         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7763                 rdev->scan_req->aborted = true;
7764                 ___cfg80211_scan_done(rdev, true);
7765         }
7766
7767         return 0;
7768 }
7769
7770 #define NL80211_FLAG_NEED_WIPHY         0x01
7771 #define NL80211_FLAG_NEED_NETDEV        0x02
7772 #define NL80211_FLAG_NEED_RTNL          0x04
7773 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7774 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7775                                          NL80211_FLAG_CHECK_NETDEV_UP)
7776 #define NL80211_FLAG_NEED_WDEV          0x10
7777 /* If a netdev is associated, it must be UP, P2P must be started */
7778 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7779                                          NL80211_FLAG_CHECK_NETDEV_UP)
7780
7781 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7782                             struct genl_info *info)
7783 {
7784         struct cfg80211_registered_device *rdev;
7785         struct wireless_dev *wdev;
7786         struct net_device *dev;
7787         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7788
7789         if (rtnl)
7790                 rtnl_lock();
7791
7792         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7793                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7794                 if (IS_ERR(rdev)) {
7795                         if (rtnl)
7796                                 rtnl_unlock();
7797                         return PTR_ERR(rdev);
7798                 }
7799                 info->user_ptr[0] = rdev;
7800         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7801                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7802                 mutex_lock(&cfg80211_mutex);
7803                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7804                                                   info->attrs);
7805                 if (IS_ERR(wdev)) {
7806                         mutex_unlock(&cfg80211_mutex);
7807                         if (rtnl)
7808                                 rtnl_unlock();
7809                         return PTR_ERR(wdev);
7810                 }
7811
7812                 dev = wdev->netdev;
7813                 rdev = wiphy_to_dev(wdev->wiphy);
7814
7815                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7816                         if (!dev) {
7817                                 mutex_unlock(&cfg80211_mutex);
7818                                 if (rtnl)
7819                                         rtnl_unlock();
7820                                 return -EINVAL;
7821                         }
7822
7823                         info->user_ptr[1] = dev;
7824                 } else {
7825                         info->user_ptr[1] = wdev;
7826                 }
7827
7828                 if (dev) {
7829                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7830                             !netif_running(dev)) {
7831                                 mutex_unlock(&cfg80211_mutex);
7832                                 if (rtnl)
7833                                         rtnl_unlock();
7834                                 return -ENETDOWN;
7835                         }
7836
7837                         dev_hold(dev);
7838                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7839                         if (!wdev->p2p_started) {
7840                                 mutex_unlock(&cfg80211_mutex);
7841                                 if (rtnl)
7842                                         rtnl_unlock();
7843                                 return -ENETDOWN;
7844                         }
7845                 }
7846
7847                 cfg80211_lock_rdev(rdev);
7848
7849                 mutex_unlock(&cfg80211_mutex);
7850
7851                 info->user_ptr[0] = rdev;
7852         }
7853
7854         return 0;
7855 }
7856
7857 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7858                               struct genl_info *info)
7859 {
7860         if (info->user_ptr[0])
7861                 cfg80211_unlock_rdev(info->user_ptr[0]);
7862         if (info->user_ptr[1]) {
7863                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7864                         struct wireless_dev *wdev = info->user_ptr[1];
7865
7866                         if (wdev->netdev)
7867                                 dev_put(wdev->netdev);
7868                 } else {
7869                         dev_put(info->user_ptr[1]);
7870                 }
7871         }
7872         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7873                 rtnl_unlock();
7874 }
7875
7876 static struct genl_ops nl80211_ops[] = {
7877         {
7878                 .cmd = NL80211_CMD_GET_WIPHY,
7879                 .doit = nl80211_get_wiphy,
7880                 .dumpit = nl80211_dump_wiphy,
7881                 .policy = nl80211_policy,
7882                 /* can be retrieved by unprivileged users */
7883                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7884         },
7885         {
7886                 .cmd = NL80211_CMD_SET_WIPHY,
7887                 .doit = nl80211_set_wiphy,
7888                 .policy = nl80211_policy,
7889                 .flags = GENL_ADMIN_PERM,
7890                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7891         },
7892         {
7893                 .cmd = NL80211_CMD_GET_INTERFACE,
7894                 .doit = nl80211_get_interface,
7895                 .dumpit = nl80211_dump_interface,
7896                 .policy = nl80211_policy,
7897                 /* can be retrieved by unprivileged users */
7898                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7899         },
7900         {
7901                 .cmd = NL80211_CMD_SET_INTERFACE,
7902                 .doit = nl80211_set_interface,
7903                 .policy = nl80211_policy,
7904                 .flags = GENL_ADMIN_PERM,
7905                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7906                                   NL80211_FLAG_NEED_RTNL,
7907         },
7908         {
7909                 .cmd = NL80211_CMD_NEW_INTERFACE,
7910                 .doit = nl80211_new_interface,
7911                 .policy = nl80211_policy,
7912                 .flags = GENL_ADMIN_PERM,
7913                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7914                                   NL80211_FLAG_NEED_RTNL,
7915         },
7916         {
7917                 .cmd = NL80211_CMD_DEL_INTERFACE,
7918                 .doit = nl80211_del_interface,
7919                 .policy = nl80211_policy,
7920                 .flags = GENL_ADMIN_PERM,
7921                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7922                                   NL80211_FLAG_NEED_RTNL,
7923         },
7924         {
7925                 .cmd = NL80211_CMD_GET_KEY,
7926                 .doit = nl80211_get_key,
7927                 .policy = nl80211_policy,
7928                 .flags = GENL_ADMIN_PERM,
7929                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7930                                   NL80211_FLAG_NEED_RTNL,
7931         },
7932         {
7933                 .cmd = NL80211_CMD_SET_KEY,
7934                 .doit = nl80211_set_key,
7935                 .policy = nl80211_policy,
7936                 .flags = GENL_ADMIN_PERM,
7937                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7938                                   NL80211_FLAG_NEED_RTNL,
7939         },
7940         {
7941                 .cmd = NL80211_CMD_NEW_KEY,
7942                 .doit = nl80211_new_key,
7943                 .policy = nl80211_policy,
7944                 .flags = GENL_ADMIN_PERM,
7945                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7946                                   NL80211_FLAG_NEED_RTNL,
7947         },
7948         {
7949                 .cmd = NL80211_CMD_DEL_KEY,
7950                 .doit = nl80211_del_key,
7951                 .policy = nl80211_policy,
7952                 .flags = GENL_ADMIN_PERM,
7953                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7954                                   NL80211_FLAG_NEED_RTNL,
7955         },
7956         {
7957                 .cmd = NL80211_CMD_SET_BEACON,
7958                 .policy = nl80211_policy,
7959                 .flags = GENL_ADMIN_PERM,
7960                 .doit = nl80211_set_beacon,
7961                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7962                                   NL80211_FLAG_NEED_RTNL,
7963         },
7964         {
7965                 .cmd = NL80211_CMD_START_AP,
7966                 .policy = nl80211_policy,
7967                 .flags = GENL_ADMIN_PERM,
7968                 .doit = nl80211_start_ap,
7969                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7970                                   NL80211_FLAG_NEED_RTNL,
7971         },
7972         {
7973                 .cmd = NL80211_CMD_STOP_AP,
7974                 .policy = nl80211_policy,
7975                 .flags = GENL_ADMIN_PERM,
7976                 .doit = nl80211_stop_ap,
7977                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7978                                   NL80211_FLAG_NEED_RTNL,
7979         },
7980         {
7981                 .cmd = NL80211_CMD_GET_STATION,
7982                 .doit = nl80211_get_station,
7983                 .dumpit = nl80211_dump_station,
7984                 .policy = nl80211_policy,
7985                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7986                                   NL80211_FLAG_NEED_RTNL,
7987         },
7988         {
7989                 .cmd = NL80211_CMD_SET_STATION,
7990                 .doit = nl80211_set_station,
7991                 .policy = nl80211_policy,
7992                 .flags = GENL_ADMIN_PERM,
7993                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7994                                   NL80211_FLAG_NEED_RTNL,
7995         },
7996         {
7997                 .cmd = NL80211_CMD_NEW_STATION,
7998                 .doit = nl80211_new_station,
7999                 .policy = nl80211_policy,
8000                 .flags = GENL_ADMIN_PERM,
8001                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8002                                   NL80211_FLAG_NEED_RTNL,
8003         },
8004         {
8005                 .cmd = NL80211_CMD_DEL_STATION,
8006                 .doit = nl80211_del_station,
8007                 .policy = nl80211_policy,
8008                 .flags = GENL_ADMIN_PERM,
8009                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8010                                   NL80211_FLAG_NEED_RTNL,
8011         },
8012         {
8013                 .cmd = NL80211_CMD_GET_MPATH,
8014                 .doit = nl80211_get_mpath,
8015                 .dumpit = nl80211_dump_mpath,
8016                 .policy = nl80211_policy,
8017                 .flags = GENL_ADMIN_PERM,
8018                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8019                                   NL80211_FLAG_NEED_RTNL,
8020         },
8021         {
8022                 .cmd = NL80211_CMD_SET_MPATH,
8023                 .doit = nl80211_set_mpath,
8024                 .policy = nl80211_policy,
8025                 .flags = GENL_ADMIN_PERM,
8026                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8027                                   NL80211_FLAG_NEED_RTNL,
8028         },
8029         {
8030                 .cmd = NL80211_CMD_NEW_MPATH,
8031                 .doit = nl80211_new_mpath,
8032                 .policy = nl80211_policy,
8033                 .flags = GENL_ADMIN_PERM,
8034                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8035                                   NL80211_FLAG_NEED_RTNL,
8036         },
8037         {
8038                 .cmd = NL80211_CMD_DEL_MPATH,
8039                 .doit = nl80211_del_mpath,
8040                 .policy = nl80211_policy,
8041                 .flags = GENL_ADMIN_PERM,
8042                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8043                                   NL80211_FLAG_NEED_RTNL,
8044         },
8045         {
8046                 .cmd = NL80211_CMD_SET_BSS,
8047                 .doit = nl80211_set_bss,
8048                 .policy = nl80211_policy,
8049                 .flags = GENL_ADMIN_PERM,
8050                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8051                                   NL80211_FLAG_NEED_RTNL,
8052         },
8053         {
8054                 .cmd = NL80211_CMD_GET_REG,
8055                 .doit = nl80211_get_reg,
8056                 .policy = nl80211_policy,
8057                 /* can be retrieved by unprivileged users */
8058         },
8059         {
8060                 .cmd = NL80211_CMD_SET_REG,
8061                 .doit = nl80211_set_reg,
8062                 .policy = nl80211_policy,
8063                 .flags = GENL_ADMIN_PERM,
8064         },
8065         {
8066                 .cmd = NL80211_CMD_REQ_SET_REG,
8067                 .doit = nl80211_req_set_reg,
8068                 .policy = nl80211_policy,
8069                 .flags = GENL_ADMIN_PERM,
8070         },
8071         {
8072                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8073                 .doit = nl80211_get_mesh_config,
8074                 .policy = nl80211_policy,
8075                 /* can be retrieved by unprivileged users */
8076                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8077                                   NL80211_FLAG_NEED_RTNL,
8078         },
8079         {
8080                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8081                 .doit = nl80211_update_mesh_config,
8082                 .policy = nl80211_policy,
8083                 .flags = GENL_ADMIN_PERM,
8084                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8085                                   NL80211_FLAG_NEED_RTNL,
8086         },
8087         {
8088                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8089                 .doit = nl80211_trigger_scan,
8090                 .policy = nl80211_policy,
8091                 .flags = GENL_ADMIN_PERM,
8092                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8093                                   NL80211_FLAG_NEED_RTNL,
8094         },
8095         {
8096                 .cmd = NL80211_CMD_GET_SCAN,
8097                 .policy = nl80211_policy,
8098                 .dumpit = nl80211_dump_scan,
8099         },
8100         {
8101                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8102                 .doit = nl80211_start_sched_scan,
8103                 .policy = nl80211_policy,
8104                 .flags = GENL_ADMIN_PERM,
8105                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8106                                   NL80211_FLAG_NEED_RTNL,
8107         },
8108         {
8109                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8110                 .doit = nl80211_stop_sched_scan,
8111                 .policy = nl80211_policy,
8112                 .flags = GENL_ADMIN_PERM,
8113                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8114                                   NL80211_FLAG_NEED_RTNL,
8115         },
8116         {
8117                 .cmd = NL80211_CMD_AUTHENTICATE,
8118                 .doit = nl80211_authenticate,
8119                 .policy = nl80211_policy,
8120                 .flags = GENL_ADMIN_PERM,
8121                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8122                                   NL80211_FLAG_NEED_RTNL,
8123         },
8124         {
8125                 .cmd = NL80211_CMD_ASSOCIATE,
8126                 .doit = nl80211_associate,
8127                 .policy = nl80211_policy,
8128                 .flags = GENL_ADMIN_PERM,
8129                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8130                                   NL80211_FLAG_NEED_RTNL,
8131         },
8132         {
8133                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8134                 .doit = nl80211_deauthenticate,
8135                 .policy = nl80211_policy,
8136                 .flags = GENL_ADMIN_PERM,
8137                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8138                                   NL80211_FLAG_NEED_RTNL,
8139         },
8140         {
8141                 .cmd = NL80211_CMD_DISASSOCIATE,
8142                 .doit = nl80211_disassociate,
8143                 .policy = nl80211_policy,
8144                 .flags = GENL_ADMIN_PERM,
8145                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8146                                   NL80211_FLAG_NEED_RTNL,
8147         },
8148         {
8149                 .cmd = NL80211_CMD_JOIN_IBSS,
8150                 .doit = nl80211_join_ibss,
8151                 .policy = nl80211_policy,
8152                 .flags = GENL_ADMIN_PERM,
8153                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8154                                   NL80211_FLAG_NEED_RTNL,
8155         },
8156         {
8157                 .cmd = NL80211_CMD_LEAVE_IBSS,
8158                 .doit = nl80211_leave_ibss,
8159                 .policy = nl80211_policy,
8160                 .flags = GENL_ADMIN_PERM,
8161                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8162                                   NL80211_FLAG_NEED_RTNL,
8163         },
8164 #ifdef CONFIG_NL80211_TESTMODE
8165         {
8166                 .cmd = NL80211_CMD_TESTMODE,
8167                 .doit = nl80211_testmode_do,
8168                 .dumpit = nl80211_testmode_dump,
8169                 .policy = nl80211_policy,
8170                 .flags = GENL_ADMIN_PERM,
8171                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8172                                   NL80211_FLAG_NEED_RTNL,
8173         },
8174 #endif
8175         {
8176                 .cmd = NL80211_CMD_CONNECT,
8177                 .doit = nl80211_connect,
8178                 .policy = nl80211_policy,
8179                 .flags = GENL_ADMIN_PERM,
8180                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8181                                   NL80211_FLAG_NEED_RTNL,
8182         },
8183         {
8184                 .cmd = NL80211_CMD_DISCONNECT,
8185                 .doit = nl80211_disconnect,
8186                 .policy = nl80211_policy,
8187                 .flags = GENL_ADMIN_PERM,
8188                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8189                                   NL80211_FLAG_NEED_RTNL,
8190         },
8191         {
8192                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8193                 .doit = nl80211_wiphy_netns,
8194                 .policy = nl80211_policy,
8195                 .flags = GENL_ADMIN_PERM,
8196                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8197                                   NL80211_FLAG_NEED_RTNL,
8198         },
8199         {
8200                 .cmd = NL80211_CMD_GET_SURVEY,
8201                 .policy = nl80211_policy,
8202                 .dumpit = nl80211_dump_survey,
8203         },
8204         {
8205                 .cmd = NL80211_CMD_SET_PMKSA,
8206                 .doit = nl80211_setdel_pmksa,
8207                 .policy = nl80211_policy,
8208                 .flags = GENL_ADMIN_PERM,
8209                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8210                                   NL80211_FLAG_NEED_RTNL,
8211         },
8212         {
8213                 .cmd = NL80211_CMD_DEL_PMKSA,
8214                 .doit = nl80211_setdel_pmksa,
8215                 .policy = nl80211_policy,
8216                 .flags = GENL_ADMIN_PERM,
8217                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8218                                   NL80211_FLAG_NEED_RTNL,
8219         },
8220         {
8221                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8222                 .doit = nl80211_flush_pmksa,
8223                 .policy = nl80211_policy,
8224                 .flags = GENL_ADMIN_PERM,
8225                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8226                                   NL80211_FLAG_NEED_RTNL,
8227         },
8228         {
8229                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8230                 .doit = nl80211_remain_on_channel,
8231                 .policy = nl80211_policy,
8232                 .flags = GENL_ADMIN_PERM,
8233                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8234                                   NL80211_FLAG_NEED_RTNL,
8235         },
8236         {
8237                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8238                 .doit = nl80211_cancel_remain_on_channel,
8239                 .policy = nl80211_policy,
8240                 .flags = GENL_ADMIN_PERM,
8241                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8242                                   NL80211_FLAG_NEED_RTNL,
8243         },
8244         {
8245                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8246                 .doit = nl80211_set_tx_bitrate_mask,
8247                 .policy = nl80211_policy,
8248                 .flags = GENL_ADMIN_PERM,
8249                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8250                                   NL80211_FLAG_NEED_RTNL,
8251         },
8252         {
8253                 .cmd = NL80211_CMD_REGISTER_FRAME,
8254                 .doit = nl80211_register_mgmt,
8255                 .policy = nl80211_policy,
8256                 .flags = GENL_ADMIN_PERM,
8257                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8258                                   NL80211_FLAG_NEED_RTNL,
8259         },
8260         {
8261                 .cmd = NL80211_CMD_FRAME,
8262                 .doit = nl80211_tx_mgmt,
8263                 .policy = nl80211_policy,
8264                 .flags = GENL_ADMIN_PERM,
8265                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8266                                   NL80211_FLAG_NEED_RTNL,
8267         },
8268         {
8269                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8270                 .doit = nl80211_tx_mgmt_cancel_wait,
8271                 .policy = nl80211_policy,
8272                 .flags = GENL_ADMIN_PERM,
8273                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8274                                   NL80211_FLAG_NEED_RTNL,
8275         },
8276         {
8277                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8278                 .doit = nl80211_set_power_save,
8279                 .policy = nl80211_policy,
8280                 .flags = GENL_ADMIN_PERM,
8281                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8282                                   NL80211_FLAG_NEED_RTNL,
8283         },
8284         {
8285                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8286                 .doit = nl80211_get_power_save,
8287                 .policy = nl80211_policy,
8288                 /* can be retrieved by unprivileged users */
8289                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8290                                   NL80211_FLAG_NEED_RTNL,
8291         },
8292         {
8293                 .cmd = NL80211_CMD_SET_CQM,
8294                 .doit = nl80211_set_cqm,
8295                 .policy = nl80211_policy,
8296                 .flags = GENL_ADMIN_PERM,
8297                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8298                                   NL80211_FLAG_NEED_RTNL,
8299         },
8300         {
8301                 .cmd = NL80211_CMD_SET_CHANNEL,
8302                 .doit = nl80211_set_channel,
8303                 .policy = nl80211_policy,
8304                 .flags = GENL_ADMIN_PERM,
8305                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8306                                   NL80211_FLAG_NEED_RTNL,
8307         },
8308         {
8309                 .cmd = NL80211_CMD_SET_WDS_PEER,
8310                 .doit = nl80211_set_wds_peer,
8311                 .policy = nl80211_policy,
8312                 .flags = GENL_ADMIN_PERM,
8313                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8314                                   NL80211_FLAG_NEED_RTNL,
8315         },
8316         {
8317                 .cmd = NL80211_CMD_JOIN_MESH,
8318                 .doit = nl80211_join_mesh,
8319                 .policy = nl80211_policy,
8320                 .flags = GENL_ADMIN_PERM,
8321                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8322                                   NL80211_FLAG_NEED_RTNL,
8323         },
8324         {
8325                 .cmd = NL80211_CMD_LEAVE_MESH,
8326                 .doit = nl80211_leave_mesh,
8327                 .policy = nl80211_policy,
8328                 .flags = GENL_ADMIN_PERM,
8329                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8330                                   NL80211_FLAG_NEED_RTNL,
8331         },
8332 #ifdef CONFIG_PM
8333         {
8334                 .cmd = NL80211_CMD_GET_WOWLAN,
8335                 .doit = nl80211_get_wowlan,
8336                 .policy = nl80211_policy,
8337                 /* can be retrieved by unprivileged users */
8338                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8339                                   NL80211_FLAG_NEED_RTNL,
8340         },
8341         {
8342                 .cmd = NL80211_CMD_SET_WOWLAN,
8343                 .doit = nl80211_set_wowlan,
8344                 .policy = nl80211_policy,
8345                 .flags = GENL_ADMIN_PERM,
8346                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8347                                   NL80211_FLAG_NEED_RTNL,
8348         },
8349 #endif
8350         {
8351                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8352                 .doit = nl80211_set_rekey_data,
8353                 .policy = nl80211_policy,
8354                 .flags = GENL_ADMIN_PERM,
8355                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8356                                   NL80211_FLAG_NEED_RTNL,
8357         },
8358         {
8359                 .cmd = NL80211_CMD_TDLS_MGMT,
8360                 .doit = nl80211_tdls_mgmt,
8361                 .policy = nl80211_policy,
8362                 .flags = GENL_ADMIN_PERM,
8363                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8364                                   NL80211_FLAG_NEED_RTNL,
8365         },
8366         {
8367                 .cmd = NL80211_CMD_TDLS_OPER,
8368                 .doit = nl80211_tdls_oper,
8369                 .policy = nl80211_policy,
8370                 .flags = GENL_ADMIN_PERM,
8371                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8372                                   NL80211_FLAG_NEED_RTNL,
8373         },
8374         {
8375                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8376                 .doit = nl80211_register_unexpected_frame,
8377                 .policy = nl80211_policy,
8378                 .flags = GENL_ADMIN_PERM,
8379                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8380                                   NL80211_FLAG_NEED_RTNL,
8381         },
8382         {
8383                 .cmd = NL80211_CMD_PROBE_CLIENT,
8384                 .doit = nl80211_probe_client,
8385                 .policy = nl80211_policy,
8386                 .flags = GENL_ADMIN_PERM,
8387                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8388                                   NL80211_FLAG_NEED_RTNL,
8389         },
8390         {
8391                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8392                 .doit = nl80211_register_beacons,
8393                 .policy = nl80211_policy,
8394                 .flags = GENL_ADMIN_PERM,
8395                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8396                                   NL80211_FLAG_NEED_RTNL,
8397         },
8398         {
8399                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8400                 .doit = nl80211_set_noack_map,
8401                 .policy = nl80211_policy,
8402                 .flags = GENL_ADMIN_PERM,
8403                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8404                                   NL80211_FLAG_NEED_RTNL,
8405         },
8406         {
8407                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8408                 .doit = nl80211_start_p2p_device,
8409                 .policy = nl80211_policy,
8410                 .flags = GENL_ADMIN_PERM,
8411                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8412                                   NL80211_FLAG_NEED_RTNL,
8413         },
8414         {
8415                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8416                 .doit = nl80211_stop_p2p_device,
8417                 .policy = nl80211_policy,
8418                 .flags = GENL_ADMIN_PERM,
8419                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8420                                   NL80211_FLAG_NEED_RTNL,
8421         },
8422         {
8423                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8424                 .doit = nl80211_set_mcast_rate,
8425                 .policy = nl80211_policy,
8426                 .flags = GENL_ADMIN_PERM,
8427                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8428                                   NL80211_FLAG_NEED_RTNL,
8429         },
8430         {
8431                 .cmd = NL80211_CMD_SET_MAC_ACL,
8432                 .doit = nl80211_set_mac_acl,
8433                 .policy = nl80211_policy,
8434                 .flags = GENL_ADMIN_PERM,
8435                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8436                                   NL80211_FLAG_NEED_RTNL,
8437         },
8438         {
8439                 .cmd = NL80211_CMD_RADAR_DETECT,
8440                 .doit = nl80211_start_radar_detection,
8441                 .policy = nl80211_policy,
8442                 .flags = GENL_ADMIN_PERM,
8443                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8444                                   NL80211_FLAG_NEED_RTNL,
8445         },
8446 };
8447
8448 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8449         .name = "mlme",
8450 };
8451
8452 /* multicast groups */
8453 static struct genl_multicast_group nl80211_config_mcgrp = {
8454         .name = "config",
8455 };
8456 static struct genl_multicast_group nl80211_scan_mcgrp = {
8457         .name = "scan",
8458 };
8459 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8460         .name = "regulatory",
8461 };
8462
8463 /* notification functions */
8464
8465 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8466 {
8467         struct sk_buff *msg;
8468
8469         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8470         if (!msg)
8471                 return;
8472
8473         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
8474                 nlmsg_free(msg);
8475                 return;
8476         }
8477
8478         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8479                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8480 }
8481
8482 static int nl80211_add_scan_req(struct sk_buff *msg,
8483                                 struct cfg80211_registered_device *rdev)
8484 {
8485         struct cfg80211_scan_request *req = rdev->scan_req;
8486         struct nlattr *nest;
8487         int i;
8488
8489         ASSERT_RDEV_LOCK(rdev);
8490
8491         if (WARN_ON(!req))
8492                 return 0;
8493
8494         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8495         if (!nest)
8496                 goto nla_put_failure;
8497         for (i = 0; i < req->n_ssids; i++) {
8498                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8499                         goto nla_put_failure;
8500         }
8501         nla_nest_end(msg, nest);
8502
8503         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8504         if (!nest)
8505                 goto nla_put_failure;
8506         for (i = 0; i < req->n_channels; i++) {
8507                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8508                         goto nla_put_failure;
8509         }
8510         nla_nest_end(msg, nest);
8511
8512         if (req->ie &&
8513             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8514                 goto nla_put_failure;
8515
8516         if (req->flags)
8517                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8518
8519         return 0;
8520  nla_put_failure:
8521         return -ENOBUFS;
8522 }
8523
8524 static int nl80211_send_scan_msg(struct sk_buff *msg,
8525                                  struct cfg80211_registered_device *rdev,
8526                                  struct wireless_dev *wdev,
8527                                  u32 portid, u32 seq, int flags,
8528                                  u32 cmd)
8529 {
8530         void *hdr;
8531
8532         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8533         if (!hdr)
8534                 return -1;
8535
8536         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8537             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8538                                          wdev->netdev->ifindex)) ||
8539             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8540                 goto nla_put_failure;
8541
8542         /* ignore errors and send incomplete event anyway */
8543         nl80211_add_scan_req(msg, rdev);
8544
8545         return genlmsg_end(msg, hdr);
8546
8547  nla_put_failure:
8548         genlmsg_cancel(msg, hdr);
8549         return -EMSGSIZE;
8550 }
8551
8552 static int
8553 nl80211_send_sched_scan_msg(struct sk_buff *msg,
8554                             struct cfg80211_registered_device *rdev,
8555                             struct net_device *netdev,
8556                             u32 portid, u32 seq, int flags, u32 cmd)
8557 {
8558         void *hdr;
8559
8560         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8561         if (!hdr)
8562                 return -1;
8563
8564         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8565             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8566                 goto nla_put_failure;
8567
8568         return genlmsg_end(msg, hdr);
8569
8570  nla_put_failure:
8571         genlmsg_cancel(msg, hdr);
8572         return -EMSGSIZE;
8573 }
8574
8575 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
8576                              struct wireless_dev *wdev)
8577 {
8578         struct sk_buff *msg;
8579
8580         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8581         if (!msg)
8582                 return;
8583
8584         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8585                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
8586                 nlmsg_free(msg);
8587                 return;
8588         }
8589
8590         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8591                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8592 }
8593
8594 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
8595                             struct wireless_dev *wdev)
8596 {
8597         struct sk_buff *msg;
8598
8599         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8600         if (!msg)
8601                 return;
8602
8603         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8604                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
8605                 nlmsg_free(msg);
8606                 return;
8607         }
8608
8609         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8610                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8611 }
8612
8613 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
8614                                struct wireless_dev *wdev)
8615 {
8616         struct sk_buff *msg;
8617
8618         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8619         if (!msg)
8620                 return;
8621
8622         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8623                                   NL80211_CMD_SCAN_ABORTED) < 0) {
8624                 nlmsg_free(msg);
8625                 return;
8626         }
8627
8628         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8629                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8630 }
8631
8632 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
8633                                      struct net_device *netdev)
8634 {
8635         struct sk_buff *msg;
8636
8637         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8638         if (!msg)
8639                 return;
8640
8641         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
8642                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
8643                 nlmsg_free(msg);
8644                 return;
8645         }
8646
8647         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8648                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8649 }
8650
8651 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
8652                              struct net_device *netdev, u32 cmd)
8653 {
8654         struct sk_buff *msg;
8655
8656         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8657         if (!msg)
8658                 return;
8659
8660         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
8661                 nlmsg_free(msg);
8662                 return;
8663         }
8664
8665         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8666                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8667 }
8668
8669 /*
8670  * This can happen on global regulatory changes or device specific settings
8671  * based on custom world regulatory domains.
8672  */
8673 void nl80211_send_reg_change_event(struct regulatory_request *request)
8674 {
8675         struct sk_buff *msg;
8676         void *hdr;
8677
8678         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8679         if (!msg)
8680                 return;
8681
8682         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8683         if (!hdr) {
8684                 nlmsg_free(msg);
8685                 return;
8686         }
8687
8688         /* Userspace can always count this one always being set */
8689         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8690                 goto nla_put_failure;
8691
8692         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8693                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8694                                NL80211_REGDOM_TYPE_WORLD))
8695                         goto nla_put_failure;
8696         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8697                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8698                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8699                         goto nla_put_failure;
8700         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8701                    request->intersect) {
8702                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8703                                NL80211_REGDOM_TYPE_INTERSECTION))
8704                         goto nla_put_failure;
8705         } else {
8706                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8707                                NL80211_REGDOM_TYPE_COUNTRY) ||
8708                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8709                                    request->alpha2))
8710                         goto nla_put_failure;
8711         }
8712
8713         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
8714             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8715                 goto nla_put_failure;
8716
8717         genlmsg_end(msg, hdr);
8718
8719         rcu_read_lock();
8720         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8721                                 GFP_ATOMIC);
8722         rcu_read_unlock();
8723
8724         return;
8725
8726 nla_put_failure:
8727         genlmsg_cancel(msg, hdr);
8728         nlmsg_free(msg);
8729 }
8730
8731 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8732                                     struct net_device *netdev,
8733                                     const u8 *buf, size_t len,
8734                                     enum nl80211_commands cmd, gfp_t gfp)
8735 {
8736         struct sk_buff *msg;
8737         void *hdr;
8738
8739         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8740         if (!msg)
8741                 return;
8742
8743         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8744         if (!hdr) {
8745                 nlmsg_free(msg);
8746                 return;
8747         }
8748
8749         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8750             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8751             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8752                 goto nla_put_failure;
8753
8754         genlmsg_end(msg, hdr);
8755
8756         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8757                                 nl80211_mlme_mcgrp.id, gfp);
8758         return;
8759
8760  nla_put_failure:
8761         genlmsg_cancel(msg, hdr);
8762         nlmsg_free(msg);
8763 }
8764
8765 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8766                           struct net_device *netdev, const u8 *buf,
8767                           size_t len, gfp_t gfp)
8768 {
8769         nl80211_send_mlme_event(rdev, netdev, buf, len,
8770                                 NL80211_CMD_AUTHENTICATE, gfp);
8771 }
8772
8773 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8774                            struct net_device *netdev, const u8 *buf,
8775                            size_t len, gfp_t gfp)
8776 {
8777         nl80211_send_mlme_event(rdev, netdev, buf, len,
8778                                 NL80211_CMD_ASSOCIATE, gfp);
8779 }
8780
8781 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8782                          struct net_device *netdev, const u8 *buf,
8783                          size_t len, gfp_t gfp)
8784 {
8785         nl80211_send_mlme_event(rdev, netdev, buf, len,
8786                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8787 }
8788
8789 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8790                            struct net_device *netdev, const u8 *buf,
8791                            size_t len, gfp_t gfp)
8792 {
8793         nl80211_send_mlme_event(rdev, netdev, buf, len,
8794                                 NL80211_CMD_DISASSOCIATE, gfp);
8795 }
8796
8797 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8798                                 struct net_device *netdev, const u8 *buf,
8799                                 size_t len, gfp_t gfp)
8800 {
8801         nl80211_send_mlme_event(rdev, netdev, buf, len,
8802                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8803 }
8804
8805 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8806                                   struct net_device *netdev, const u8 *buf,
8807                                   size_t len, gfp_t gfp)
8808 {
8809         nl80211_send_mlme_event(rdev, netdev, buf, len,
8810                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8811 }
8812
8813 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8814                                       struct net_device *netdev, int cmd,
8815                                       const u8 *addr, gfp_t gfp)
8816 {
8817         struct sk_buff *msg;
8818         void *hdr;
8819
8820         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8821         if (!msg)
8822                 return;
8823
8824         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8825         if (!hdr) {
8826                 nlmsg_free(msg);
8827                 return;
8828         }
8829
8830         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8831             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8832             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8833             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8834                 goto nla_put_failure;
8835
8836         genlmsg_end(msg, hdr);
8837
8838         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8839                                 nl80211_mlme_mcgrp.id, gfp);
8840         return;
8841
8842  nla_put_failure:
8843         genlmsg_cancel(msg, hdr);
8844         nlmsg_free(msg);
8845 }
8846
8847 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8848                                struct net_device *netdev, const u8 *addr,
8849                                gfp_t gfp)
8850 {
8851         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8852                                   addr, gfp);
8853 }
8854
8855 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8856                                 struct net_device *netdev, const u8 *addr,
8857                                 gfp_t gfp)
8858 {
8859         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8860                                   addr, gfp);
8861 }
8862
8863 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8864                                  struct net_device *netdev, const u8 *bssid,
8865                                  const u8 *req_ie, size_t req_ie_len,
8866                                  const u8 *resp_ie, size_t resp_ie_len,
8867                                  u16 status, gfp_t gfp)
8868 {
8869         struct sk_buff *msg;
8870         void *hdr;
8871
8872         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8873         if (!msg)
8874                 return;
8875
8876         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8877         if (!hdr) {
8878                 nlmsg_free(msg);
8879                 return;
8880         }
8881
8882         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8883             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8884             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8885             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8886             (req_ie &&
8887              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8888             (resp_ie &&
8889              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8890                 goto nla_put_failure;
8891
8892         genlmsg_end(msg, hdr);
8893
8894         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8895                                 nl80211_mlme_mcgrp.id, gfp);
8896         return;
8897
8898  nla_put_failure:
8899         genlmsg_cancel(msg, hdr);
8900         nlmsg_free(msg);
8901
8902 }
8903
8904 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8905                          struct net_device *netdev, const u8 *bssid,
8906                          const u8 *req_ie, size_t req_ie_len,
8907                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8908 {
8909         struct sk_buff *msg;
8910         void *hdr;
8911
8912         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8913         if (!msg)
8914                 return;
8915
8916         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8917         if (!hdr) {
8918                 nlmsg_free(msg);
8919                 return;
8920         }
8921
8922         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8923             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8924             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8925             (req_ie &&
8926              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8927             (resp_ie &&
8928              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8929                 goto nla_put_failure;
8930
8931         genlmsg_end(msg, hdr);
8932
8933         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8934                                 nl80211_mlme_mcgrp.id, gfp);
8935         return;
8936
8937  nla_put_failure:
8938         genlmsg_cancel(msg, hdr);
8939         nlmsg_free(msg);
8940
8941 }
8942
8943 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8944                                struct net_device *netdev, u16 reason,
8945                                const u8 *ie, size_t ie_len, bool from_ap)
8946 {
8947         struct sk_buff *msg;
8948         void *hdr;
8949
8950         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8951         if (!msg)
8952                 return;
8953
8954         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8955         if (!hdr) {
8956                 nlmsg_free(msg);
8957                 return;
8958         }
8959
8960         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8961             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8962             (from_ap && reason &&
8963              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8964             (from_ap &&
8965              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8966             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8967                 goto nla_put_failure;
8968
8969         genlmsg_end(msg, hdr);
8970
8971         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8972                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8973         return;
8974
8975  nla_put_failure:
8976         genlmsg_cancel(msg, hdr);
8977         nlmsg_free(msg);
8978
8979 }
8980
8981 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8982                              struct net_device *netdev, const u8 *bssid,
8983                              gfp_t gfp)
8984 {
8985         struct sk_buff *msg;
8986         void *hdr;
8987
8988         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8989         if (!msg)
8990                 return;
8991
8992         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8993         if (!hdr) {
8994                 nlmsg_free(msg);
8995                 return;
8996         }
8997
8998         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8999             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9000             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9001                 goto nla_put_failure;
9002
9003         genlmsg_end(msg, hdr);
9004
9005         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9006                                 nl80211_mlme_mcgrp.id, gfp);
9007         return;
9008
9009  nla_put_failure:
9010         genlmsg_cancel(msg, hdr);
9011         nlmsg_free(msg);
9012 }
9013
9014 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
9015                 struct net_device *netdev,
9016                 const u8 *macaddr, const u8* ie, u8 ie_len,
9017                 gfp_t gfp)
9018 {
9019         struct sk_buff *msg;
9020         void *hdr;
9021
9022         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9023         if (!msg)
9024                 return;
9025
9026         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9027         if (!hdr) {
9028                 nlmsg_free(msg);
9029                 return;
9030         }
9031
9032         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9033             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9034             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
9035             (ie_len && ie &&
9036              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9037                 goto nla_put_failure;
9038
9039         genlmsg_end(msg, hdr);
9040
9041         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9042                                 nl80211_mlme_mcgrp.id, gfp);
9043         return;
9044
9045  nla_put_failure:
9046         genlmsg_cancel(msg, hdr);
9047         nlmsg_free(msg);
9048 }
9049
9050 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9051                                  struct net_device *netdev, const u8 *addr,
9052                                  enum nl80211_key_type key_type, int key_id,
9053                                  const u8 *tsc, gfp_t gfp)
9054 {
9055         struct sk_buff *msg;
9056         void *hdr;
9057
9058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9059         if (!msg)
9060                 return;
9061
9062         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9063         if (!hdr) {
9064                 nlmsg_free(msg);
9065                 return;
9066         }
9067
9068         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9069             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9070             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9071             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9072             (key_id != -1 &&
9073              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9074             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9075                 goto nla_put_failure;
9076
9077         genlmsg_end(msg, hdr);
9078
9079         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9080                                 nl80211_mlme_mcgrp.id, gfp);
9081         return;
9082
9083  nla_put_failure:
9084         genlmsg_cancel(msg, hdr);
9085         nlmsg_free(msg);
9086 }
9087
9088 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9089                                     struct ieee80211_channel *channel_before,
9090                                     struct ieee80211_channel *channel_after)
9091 {
9092         struct sk_buff *msg;
9093         void *hdr;
9094         struct nlattr *nl_freq;
9095
9096         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9097         if (!msg)
9098                 return;
9099
9100         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9101         if (!hdr) {
9102                 nlmsg_free(msg);
9103                 return;
9104         }
9105
9106         /*
9107          * Since we are applying the beacon hint to a wiphy we know its
9108          * wiphy_idx is valid
9109          */
9110         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9111                 goto nla_put_failure;
9112
9113         /* Before */
9114         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9115         if (!nl_freq)
9116                 goto nla_put_failure;
9117         if (nl80211_msg_put_channel(msg, channel_before))
9118                 goto nla_put_failure;
9119         nla_nest_end(msg, nl_freq);
9120
9121         /* After */
9122         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9123         if (!nl_freq)
9124                 goto nla_put_failure;
9125         if (nl80211_msg_put_channel(msg, channel_after))
9126                 goto nla_put_failure;
9127         nla_nest_end(msg, nl_freq);
9128
9129         genlmsg_end(msg, hdr);
9130
9131         rcu_read_lock();
9132         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9133                                 GFP_ATOMIC);
9134         rcu_read_unlock();
9135
9136         return;
9137
9138 nla_put_failure:
9139         genlmsg_cancel(msg, hdr);
9140         nlmsg_free(msg);
9141 }
9142
9143 static void nl80211_send_remain_on_chan_event(
9144         int cmd, struct cfg80211_registered_device *rdev,
9145         struct wireless_dev *wdev, u64 cookie,
9146         struct ieee80211_channel *chan,
9147         unsigned int duration, gfp_t gfp)
9148 {
9149         struct sk_buff *msg;
9150         void *hdr;
9151
9152         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9153         if (!msg)
9154                 return;
9155
9156         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9157         if (!hdr) {
9158                 nlmsg_free(msg);
9159                 return;
9160         }
9161
9162         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9163             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9164                                          wdev->netdev->ifindex)) ||
9165             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9166             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9167             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9168                         NL80211_CHAN_NO_HT) ||
9169             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9170                 goto nla_put_failure;
9171
9172         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9173             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9174                 goto nla_put_failure;
9175
9176         genlmsg_end(msg, hdr);
9177
9178         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9179                                 nl80211_mlme_mcgrp.id, gfp);
9180         return;
9181
9182  nla_put_failure:
9183         genlmsg_cancel(msg, hdr);
9184         nlmsg_free(msg);
9185 }
9186
9187 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
9188                                     struct wireless_dev *wdev, u64 cookie,
9189                                     struct ieee80211_channel *chan,
9190                                     unsigned int duration, gfp_t gfp)
9191 {
9192         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9193                                           rdev, wdev, cookie, chan,
9194                                           duration, gfp);
9195 }
9196
9197 void nl80211_send_remain_on_channel_cancel(
9198         struct cfg80211_registered_device *rdev,
9199         struct wireless_dev *wdev,
9200         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
9201 {
9202         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9203                                           rdev, wdev, cookie, chan, 0, gfp);
9204 }
9205
9206 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
9207                             struct net_device *dev, const u8 *mac_addr,
9208                             struct station_info *sinfo, gfp_t gfp)
9209 {
9210         struct sk_buff *msg;
9211
9212         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9213         if (!msg)
9214                 return;
9215
9216         if (nl80211_send_station(msg, 0, 0, 0,
9217                                  rdev, dev, mac_addr, sinfo) < 0) {
9218                 nlmsg_free(msg);
9219                 return;
9220         }
9221
9222         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9223                                 nl80211_mlme_mcgrp.id, gfp);
9224 }
9225
9226 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
9227                                 struct net_device *dev, const u8 *mac_addr,
9228                                 gfp_t gfp)
9229 {
9230         struct sk_buff *msg;
9231         void *hdr;
9232
9233         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9234         if (!msg)
9235                 return;
9236
9237         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9238         if (!hdr) {
9239                 nlmsg_free(msg);
9240                 return;
9241         }
9242
9243         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9244             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9245                 goto nla_put_failure;
9246
9247         genlmsg_end(msg, hdr);
9248
9249         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9250                                 nl80211_mlme_mcgrp.id, gfp);
9251         return;
9252
9253  nla_put_failure:
9254         genlmsg_cancel(msg, hdr);
9255         nlmsg_free(msg);
9256 }
9257
9258 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
9259                                     struct net_device *dev, const u8 *mac_addr,
9260                                     enum nl80211_connect_failed_reason reason,
9261                                     gfp_t gfp)
9262 {
9263         struct sk_buff *msg;
9264         void *hdr;
9265
9266         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9267         if (!msg)
9268                 return;
9269
9270         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9271         if (!hdr) {
9272                 nlmsg_free(msg);
9273                 return;
9274         }
9275
9276         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9277             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9278             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9279                 goto nla_put_failure;
9280
9281         genlmsg_end(msg, hdr);
9282
9283         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9284                                 nl80211_mlme_mcgrp.id, gfp);
9285         return;
9286
9287  nla_put_failure:
9288         genlmsg_cancel(msg, hdr);
9289         nlmsg_free(msg);
9290 }
9291
9292 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9293                                        const u8 *addr, gfp_t gfp)
9294 {
9295         struct wireless_dev *wdev = dev->ieee80211_ptr;
9296         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9297         struct sk_buff *msg;
9298         void *hdr;
9299         int err;
9300         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9301
9302         if (!nlportid)
9303                 return false;
9304
9305         msg = nlmsg_new(100, gfp);
9306         if (!msg)
9307                 return true;
9308
9309         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9310         if (!hdr) {
9311                 nlmsg_free(msg);
9312                 return true;
9313         }
9314
9315         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9316             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9317             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9318                 goto nla_put_failure;
9319
9320         err = genlmsg_end(msg, hdr);
9321         if (err < 0) {
9322                 nlmsg_free(msg);
9323                 return true;
9324         }
9325
9326         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9327         return true;
9328
9329  nla_put_failure:
9330         genlmsg_cancel(msg, hdr);
9331         nlmsg_free(msg);
9332         return true;
9333 }
9334
9335 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
9336 {
9337         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9338                                           addr, gfp);
9339 }
9340
9341 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
9342                                     const u8 *addr, gfp_t gfp)
9343 {
9344         return __nl80211_unexpected_frame(dev,
9345                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9346                                           addr, gfp);
9347 }
9348
9349 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9350                       struct wireless_dev *wdev, u32 nlportid,
9351                       int freq, int sig_dbm,
9352                       const u8 *buf, size_t len, gfp_t gfp)
9353 {
9354         struct net_device *netdev = wdev->netdev;
9355         struct sk_buff *msg;
9356         void *hdr;
9357
9358         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9359         if (!msg)
9360                 return -ENOMEM;
9361
9362         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9363         if (!hdr) {
9364                 nlmsg_free(msg);
9365                 return -ENOMEM;
9366         }
9367
9368         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9369             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9370                                         netdev->ifindex)) ||
9371             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9372             (sig_dbm &&
9373              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9374             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9375                 goto nla_put_failure;
9376
9377         genlmsg_end(msg, hdr);
9378
9379         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9380
9381  nla_put_failure:
9382         genlmsg_cancel(msg, hdr);
9383         nlmsg_free(msg);
9384         return -ENOBUFS;
9385 }
9386
9387 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
9388                                  struct wireless_dev *wdev, u64 cookie,
9389                                  const u8 *buf, size_t len, bool ack,
9390                                  gfp_t gfp)
9391 {
9392         struct net_device *netdev = wdev->netdev;
9393         struct sk_buff *msg;
9394         void *hdr;
9395
9396         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9397         if (!msg)
9398                 return;
9399
9400         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9401         if (!hdr) {
9402                 nlmsg_free(msg);
9403                 return;
9404         }
9405
9406         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9407             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9408                                    netdev->ifindex)) ||
9409             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9410             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9411             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9412                 goto nla_put_failure;
9413
9414         genlmsg_end(msg, hdr);
9415
9416         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9417         return;
9418
9419  nla_put_failure:
9420         genlmsg_cancel(msg, hdr);
9421         nlmsg_free(msg);
9422 }
9423
9424 void
9425 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
9426                              struct net_device *netdev,
9427                              enum nl80211_cqm_rssi_threshold_event rssi_event,
9428                              gfp_t gfp)
9429 {
9430         struct sk_buff *msg;
9431         struct nlattr *pinfoattr;
9432         void *hdr;
9433
9434         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9435         if (!msg)
9436                 return;
9437
9438         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9439         if (!hdr) {
9440                 nlmsg_free(msg);
9441                 return;
9442         }
9443
9444         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9445             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9446                 goto nla_put_failure;
9447
9448         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9449         if (!pinfoattr)
9450                 goto nla_put_failure;
9451
9452         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9453                         rssi_event))
9454                 goto nla_put_failure;
9455
9456         nla_nest_end(msg, pinfoattr);
9457
9458         genlmsg_end(msg, hdr);
9459
9460         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9461                                 nl80211_mlme_mcgrp.id, gfp);
9462         return;
9463
9464  nla_put_failure:
9465         genlmsg_cancel(msg, hdr);
9466         nlmsg_free(msg);
9467 }
9468
9469 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9470                               struct net_device *netdev, const u8 *bssid,
9471                               const u8 *replay_ctr, gfp_t gfp)
9472 {
9473         struct sk_buff *msg;
9474         struct nlattr *rekey_attr;
9475         void *hdr;
9476
9477         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9478         if (!msg)
9479                 return;
9480
9481         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
9482         if (!hdr) {
9483                 nlmsg_free(msg);
9484                 return;
9485         }
9486
9487         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9488             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9489             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9490                 goto nla_put_failure;
9491
9492         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
9493         if (!rekey_attr)
9494                 goto nla_put_failure;
9495
9496         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
9497                     NL80211_REPLAY_CTR_LEN, replay_ctr))
9498                 goto nla_put_failure;
9499
9500         nla_nest_end(msg, rekey_attr);
9501
9502         genlmsg_end(msg, hdr);
9503
9504         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9505                                 nl80211_mlme_mcgrp.id, gfp);
9506         return;
9507
9508  nla_put_failure:
9509         genlmsg_cancel(msg, hdr);
9510         nlmsg_free(msg);
9511 }
9512
9513 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
9514                                     struct net_device *netdev, int index,
9515                                     const u8 *bssid, bool preauth, gfp_t gfp)
9516 {
9517         struct sk_buff *msg;
9518         struct nlattr *attr;
9519         void *hdr;
9520
9521         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9522         if (!msg)
9523                 return;
9524
9525         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
9526         if (!hdr) {
9527                 nlmsg_free(msg);
9528                 return;
9529         }
9530
9531         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9532             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9533                 goto nla_put_failure;
9534
9535         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
9536         if (!attr)
9537                 goto nla_put_failure;
9538
9539         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
9540             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
9541             (preauth &&
9542              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
9543                 goto nla_put_failure;
9544
9545         nla_nest_end(msg, attr);
9546
9547         genlmsg_end(msg, hdr);
9548
9549         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9550                                 nl80211_mlme_mcgrp.id, gfp);
9551         return;
9552
9553  nla_put_failure:
9554         genlmsg_cancel(msg, hdr);
9555         nlmsg_free(msg);
9556 }
9557
9558 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
9559                               struct net_device *netdev,
9560                               struct cfg80211_chan_def *chandef, gfp_t gfp)
9561 {
9562         struct sk_buff *msg;
9563         void *hdr;
9564
9565         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9566         if (!msg)
9567                 return;
9568
9569         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
9570         if (!hdr) {
9571                 nlmsg_free(msg);
9572                 return;
9573         }
9574
9575         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9576                 goto nla_put_failure;
9577
9578         if (nl80211_send_chandef(msg, chandef))
9579                 goto nla_put_failure;
9580
9581         genlmsg_end(msg, hdr);
9582
9583         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9584                                 nl80211_mlme_mcgrp.id, gfp);
9585         return;
9586
9587  nla_put_failure:
9588         genlmsg_cancel(msg, hdr);
9589         nlmsg_free(msg);
9590 }
9591
9592 void
9593 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
9594                             struct net_device *netdev, const u8 *peer,
9595                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
9596 {
9597         struct sk_buff *msg;
9598         struct nlattr *pinfoattr;
9599         void *hdr;
9600
9601         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9602         if (!msg)
9603                 return;
9604
9605         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9606         if (!hdr) {
9607                 nlmsg_free(msg);
9608                 return;
9609         }
9610
9611         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9612             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9613             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9614                 goto nla_put_failure;
9615
9616         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9617         if (!pinfoattr)
9618                 goto nla_put_failure;
9619
9620         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
9621                 goto nla_put_failure;
9622
9623         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
9624                 goto nla_put_failure;
9625
9626         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
9627                 goto nla_put_failure;
9628
9629         nla_nest_end(msg, pinfoattr);
9630
9631         genlmsg_end(msg, hdr);
9632
9633         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9634                                 nl80211_mlme_mcgrp.id, gfp);
9635         return;
9636
9637  nla_put_failure:
9638         genlmsg_cancel(msg, hdr);
9639         nlmsg_free(msg);
9640 }
9641
9642 void
9643 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
9644                      struct cfg80211_chan_def *chandef,
9645                      enum nl80211_radar_event event,
9646                      struct net_device *netdev, gfp_t gfp)
9647 {
9648         struct sk_buff *msg;
9649         void *hdr;
9650
9651         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9652         if (!msg)
9653                 return;
9654
9655         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
9656         if (!hdr) {
9657                 nlmsg_free(msg);
9658                 return;
9659         }
9660
9661         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
9662                 goto nla_put_failure;
9663
9664         /* NOP and radar events don't need a netdev parameter */
9665         if (netdev) {
9666                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
9667
9668                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9669                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9670                         goto nla_put_failure;
9671         }
9672
9673         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
9674                 goto nla_put_failure;
9675
9676         if (nl80211_send_chandef(msg, chandef))
9677                 goto nla_put_failure;
9678
9679         if (genlmsg_end(msg, hdr) < 0) {
9680                 nlmsg_free(msg);
9681                 return;
9682         }
9683
9684         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9685                                 nl80211_mlme_mcgrp.id, gfp);
9686         return;
9687
9688  nla_put_failure:
9689         genlmsg_cancel(msg, hdr);
9690         nlmsg_free(msg);
9691 }
9692
9693 void
9694 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
9695                                 struct net_device *netdev, const u8 *peer,
9696                                 u32 num_packets, gfp_t gfp)
9697 {
9698         struct sk_buff *msg;
9699         struct nlattr *pinfoattr;
9700         void *hdr;
9701
9702         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9703         if (!msg)
9704                 return;
9705
9706         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9707         if (!hdr) {
9708                 nlmsg_free(msg);
9709                 return;
9710         }
9711
9712         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9713             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9714             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9715                 goto nla_put_failure;
9716
9717         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9718         if (!pinfoattr)
9719                 goto nla_put_failure;
9720
9721         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9722                 goto nla_put_failure;
9723
9724         nla_nest_end(msg, pinfoattr);
9725
9726         genlmsg_end(msg, hdr);
9727
9728         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9729                                 nl80211_mlme_mcgrp.id, gfp);
9730         return;
9731
9732  nla_put_failure:
9733         genlmsg_cancel(msg, hdr);
9734         nlmsg_free(msg);
9735 }
9736
9737 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9738                            u64 cookie, bool acked, gfp_t gfp)
9739 {
9740         struct wireless_dev *wdev = dev->ieee80211_ptr;
9741         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9742         struct sk_buff *msg;
9743         void *hdr;
9744         int err;
9745
9746         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9747
9748         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9749
9750         if (!msg)
9751                 return;
9752
9753         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9754         if (!hdr) {
9755                 nlmsg_free(msg);
9756                 return;
9757         }
9758
9759         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9760             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9761             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9762             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9763             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9764                 goto nla_put_failure;
9765
9766         err = genlmsg_end(msg, hdr);
9767         if (err < 0) {
9768                 nlmsg_free(msg);
9769                 return;
9770         }
9771
9772         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9773                                 nl80211_mlme_mcgrp.id, gfp);
9774         return;
9775
9776  nla_put_failure:
9777         genlmsg_cancel(msg, hdr);
9778         nlmsg_free(msg);
9779 }
9780 EXPORT_SYMBOL(cfg80211_probe_status);
9781
9782 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9783                                  const u8 *frame, size_t len,
9784                                  int freq, int sig_dbm)
9785 {
9786         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9787         struct sk_buff *msg;
9788         void *hdr;
9789         struct cfg80211_beacon_registration *reg;
9790
9791         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9792
9793         spin_lock_bh(&rdev->beacon_registrations_lock);
9794         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9795                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9796                 if (!msg) {
9797                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9798                         return;
9799                 }
9800
9801                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9802                 if (!hdr)
9803                         goto nla_put_failure;
9804
9805                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9806                     (freq &&
9807                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9808                     (sig_dbm &&
9809                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9810                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9811                         goto nla_put_failure;
9812
9813                 genlmsg_end(msg, hdr);
9814
9815                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9816         }
9817         spin_unlock_bh(&rdev->beacon_registrations_lock);
9818         return;
9819
9820  nla_put_failure:
9821         spin_unlock_bh(&rdev->beacon_registrations_lock);
9822         if (hdr)
9823                 genlmsg_cancel(msg, hdr);
9824         nlmsg_free(msg);
9825 }
9826 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9827
9828 #ifdef CONFIG_PM
9829 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
9830                                    struct cfg80211_wowlan_wakeup *wakeup,
9831                                    gfp_t gfp)
9832 {
9833         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9834         struct sk_buff *msg;
9835         void *hdr;
9836         int err, size = 200;
9837
9838         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
9839
9840         if (wakeup)
9841                 size += wakeup->packet_present_len;
9842
9843         msg = nlmsg_new(size, gfp);
9844         if (!msg)
9845                 return;
9846
9847         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
9848         if (!hdr)
9849                 goto free_msg;
9850
9851         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9852             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9853                 goto free_msg;
9854
9855         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9856                                         wdev->netdev->ifindex))
9857                 goto free_msg;
9858
9859         if (wakeup) {
9860                 struct nlattr *reasons;
9861
9862                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9863
9864                 if (wakeup->disconnect &&
9865                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
9866                         goto free_msg;
9867                 if (wakeup->magic_pkt &&
9868                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
9869                         goto free_msg;
9870                 if (wakeup->gtk_rekey_failure &&
9871                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
9872                         goto free_msg;
9873                 if (wakeup->eap_identity_req &&
9874                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
9875                         goto free_msg;
9876                 if (wakeup->four_way_handshake &&
9877                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
9878                         goto free_msg;
9879                 if (wakeup->rfkill_release &&
9880                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
9881                         goto free_msg;
9882
9883                 if (wakeup->pattern_idx >= 0 &&
9884                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
9885                                 wakeup->pattern_idx))
9886                         goto free_msg;
9887
9888                 if (wakeup->tcp_match)
9889                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
9890
9891                 if (wakeup->tcp_connlost)
9892                         nla_put_flag(msg,
9893                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
9894
9895                 if (wakeup->tcp_nomoretokens)
9896                         nla_put_flag(msg,
9897                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
9898
9899                 if (wakeup->packet) {
9900                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
9901                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
9902
9903                         if (!wakeup->packet_80211) {
9904                                 pkt_attr =
9905                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
9906                                 len_attr =
9907                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
9908                         }
9909
9910                         if (wakeup->packet_len &&
9911                             nla_put_u32(msg, len_attr, wakeup->packet_len))
9912                                 goto free_msg;
9913
9914                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
9915                                     wakeup->packet))
9916                                 goto free_msg;
9917                 }
9918
9919                 nla_nest_end(msg, reasons);
9920         }
9921
9922         err = genlmsg_end(msg, hdr);
9923         if (err < 0)
9924                 goto free_msg;
9925
9926         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9927                                 nl80211_mlme_mcgrp.id, gfp);
9928         return;
9929
9930  free_msg:
9931         nlmsg_free(msg);
9932 }
9933 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
9934 #endif
9935
9936 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9937                                 enum nl80211_tdls_operation oper,
9938                                 u16 reason_code, gfp_t gfp)
9939 {
9940         struct wireless_dev *wdev = dev->ieee80211_ptr;
9941         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9942         struct sk_buff *msg;
9943         void *hdr;
9944         int err;
9945
9946         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9947                                          reason_code);
9948
9949         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9950         if (!msg)
9951                 return;
9952
9953         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9954         if (!hdr) {
9955                 nlmsg_free(msg);
9956                 return;
9957         }
9958
9959         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9960             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9961             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9962             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9963             (reason_code > 0 &&
9964              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9965                 goto nla_put_failure;
9966
9967         err = genlmsg_end(msg, hdr);
9968         if (err < 0) {
9969                 nlmsg_free(msg);
9970                 return;
9971         }
9972
9973         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9974                                 nl80211_mlme_mcgrp.id, gfp);
9975         return;
9976
9977  nla_put_failure:
9978         genlmsg_cancel(msg, hdr);
9979         nlmsg_free(msg);
9980 }
9981 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9982
9983 static int nl80211_netlink_notify(struct notifier_block * nb,
9984                                   unsigned long state,
9985                                   void *_notify)
9986 {
9987         struct netlink_notify *notify = _notify;
9988         struct cfg80211_registered_device *rdev;
9989         struct wireless_dev *wdev;
9990         struct cfg80211_beacon_registration *reg, *tmp;
9991
9992         if (state != NETLINK_URELEASE)
9993                 return NOTIFY_DONE;
9994
9995         rcu_read_lock();
9996
9997         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9998                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9999                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10000
10001                 spin_lock_bh(&rdev->beacon_registrations_lock);
10002                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10003                                          list) {
10004                         if (reg->nlportid == notify->portid) {
10005                                 list_del(&reg->list);
10006                                 kfree(reg);
10007                                 break;
10008                         }
10009                 }
10010                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10011         }
10012
10013         rcu_read_unlock();
10014
10015         return NOTIFY_DONE;
10016 }
10017
10018 static struct notifier_block nl80211_netlink_notifier = {
10019         .notifier_call = nl80211_netlink_notify,
10020 };
10021
10022 /* initialisation/exit functions */
10023
10024 int nl80211_init(void)
10025 {
10026         int err;
10027
10028         err = genl_register_family_with_ops(&nl80211_fam,
10029                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10030         if (err)
10031                 return err;
10032
10033         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10034         if (err)
10035                 goto err_out;
10036
10037         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10038         if (err)
10039                 goto err_out;
10040
10041         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10042         if (err)
10043                 goto err_out;
10044
10045         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10046         if (err)
10047                 goto err_out;
10048
10049 #ifdef CONFIG_NL80211_TESTMODE
10050         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10051         if (err)
10052                 goto err_out;
10053 #endif
10054
10055         err = netlink_register_notifier(&nl80211_netlink_notifier);
10056         if (err)
10057                 goto err_out;
10058
10059         return 0;
10060  err_out:
10061         genl_unregister_family(&nl80211_fam);
10062         return err;
10063 }
10064
10065 void nl80211_exit(void)
10066 {
10067         netlink_unregister_notifier(&nl80211_netlink_notifier);
10068         genl_unregister_family(&nl80211_fam);
10069 }