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         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 374         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 375         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 376                 .len = NL80211_VHT_CAPABILITY_LEN,
 377         },
 378 };
 379
 380 /* policy for the key attributes */
 381 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 382         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 383         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 384         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 385         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 386         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 387         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 388         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 389         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 390 };
 391
 392 /* policy for the key default flags */
 393 static const struct nla_policy
 394 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 395         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 396         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 397 };
 398
 399 /* policy for WoWLAN attributes */
 400 static const struct nla_policy
 401 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 402         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 403         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 404         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 405         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 406         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 407         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 408         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 409         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 410         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 411 };
 412
 413 static const struct nla_policy
 414 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 415         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 416         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 417         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 418         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 419         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 420         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 421         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 422                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 423         },
 424         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 425                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 426         },
 427         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 428         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 429         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 430 };
 431
 432 /* policy for GTK rekey offload attributes */
 433 static const struct nla_policy
 434 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 435         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 436         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 437         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 438 };
 439
 440 static const struct nla_policy
 441 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 442         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 443                                                  .len = IEEE80211_MAX_SSID_LEN },
 444         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 445 };
 446
 447 /* ifidx get helper */
 448 static int nl80211_get_ifidx(struct netlink_callback *cb)
 449 {
 450         int res;
 451
 452         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 453                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 454                           nl80211_policy);
 455         if (res)
 456                 return res;
 457
 458         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 459                 return -EINVAL;
 460
 461         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 462         if (!res)
 463                 return -EINVAL;
 464         return res;
 465 }
 466
 467 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 468                                        struct netlink_callback *cb,
 469                                        struct cfg80211_registered_device **rdev,
 470                                        struct net_device **dev)
 471 {
 472         int ifidx = cb->args[0];
 473         int err;
 474
 475         if (!ifidx)
 476                 ifidx = nl80211_get_ifidx(cb);
 477         if (ifidx < 0)
 478                 return ifidx;
 479
 480         cb->args[0] = ifidx;
 481
 482         rtnl_lock();
 483
 484         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 485         if (!*dev) {
 486                 err = -ENODEV;
 487                 goto out_rtnl;
 488         }
 489
 490         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 491         if (IS_ERR(*rdev)) {
 492                 err = PTR_ERR(*rdev);
 493                 goto out_rtnl;
 494         }
 495
 496         return 0;
 497  out_rtnl:
 498         rtnl_unlock();
 499         return err;
 500 }
 501
 502 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 503 {
 504         cfg80211_unlock_rdev(rdev);
 505         rtnl_unlock();
 506 }
 507
 508 /* IE validation */
 509 static bool is_valid_ie_attr(const struct nlattr *attr)
 510 {
 511         const u8 *pos;
 512         int len;
 513
 514         if (!attr)
 515                 return true;
 516
 517         pos = nla_data(attr);
 518         len = nla_len(attr);
 519
 520         while (len) {
 521                 u8 elemlen;
 522
 523                 if (len < 2)
 524                         return false;
 525                 len -= 2;
 526
 527                 elemlen = pos[1];
 528                 if (elemlen > len)
 529                         return false;
 530
 531                 len -= elemlen;
 532                 pos += 2 + elemlen;
 533         }
 534
 535         return true;
 536 }
 537
 538 /* message building helper */
 539 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 540                                    int flags, u8 cmd)
 541 {
 542         /* since there is no private header just add the generic one */
 543         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 544 }
 545
 546 static int nl80211_msg_put_channel(struct sk_buff *msg,
 547                                    struct ieee80211_channel *chan,
 548                                    bool large)
 549 {
 550         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 551                         chan->center_freq))
 552                 goto nla_put_failure;
 553
 554         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 555             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 556                 goto nla_put_failure;
 557         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 558             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 559                 goto nla_put_failure;
 560         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 561             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 562                 goto nla_put_failure;
 563         if (chan->flags & IEEE80211_CHAN_RADAR) {
 564                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 565                         goto nla_put_failure;
 566                 if (large) {
 567                         u32 time;
 568
 569                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 570
 571                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 572                                         chan->dfs_state))
 573                                 goto nla_put_failure;
 574                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 575                                         time))
 576                                 goto nla_put_failure;
 577                 }
 578         }
 579
 580         if (large) {
 581                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 582                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 583                         goto nla_put_failure;
 584                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 585                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 586                         goto nla_put_failure;
 587                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 588                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 589                         goto nla_put_failure;
 590                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 591                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 592                         goto nla_put_failure;
 593         }
 594
 595         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 596                         DBM_TO_MBM(chan->max_power)))
 597                 goto nla_put_failure;
 598
 599         return 0;
 600
 601  nla_put_failure:
 602         return -ENOBUFS;
 603 }
 604
 605 /* netlink command implementations */
 606
 607 struct key_parse {
 608         struct key_params p;
 609         int idx;
 610         int type;
 611         bool def, defmgmt;
 612         bool def_uni, def_multi;
 613 };
 614
 615 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 616 {
 617         struct nlattr *tb[NL80211_KEY_MAX + 1];
 618         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 619                                    nl80211_key_policy);
 620         if (err)
 621                 return err;
 622
 623         k->def = !!tb[NL80211_KEY_DEFAULT];
 624         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 625
 626         if (k->def) {
 627                 k->def_uni = true;
 628                 k->def_multi = true;
 629         }
 630         if (k->defmgmt)
 631                 k->def_multi = true;
 632
 633         if (tb[NL80211_KEY_IDX])
 634                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 635
 636         if (tb[NL80211_KEY_DATA]) {
 637                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 638                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 639         }
 640
 641         if (tb[NL80211_KEY_SEQ]) {
 642                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 643                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 644         }
 645
 646         if (tb[NL80211_KEY_CIPHER])
 647                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 648
 649         if (tb[NL80211_KEY_TYPE]) {
 650                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 651                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 652                         return -EINVAL;
 653         }
 654
 655         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 656                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 657                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 658                                        tb[NL80211_KEY_DEFAULT_TYPES],
 659                                        nl80211_key_default_policy);
 660                 if (err)
 661                         return err;
 662
 663                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 664                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 665         }
 666
 667         return 0;
 668 }
 669
 670 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 671 {
 672         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 673                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 674                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 675         }
 676
 677         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 678                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 679                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 680         }
 681
 682         if (info->attrs[NL80211_ATTR_KEY_IDX])
 683                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 684
 685         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 686                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 687
 688         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 689         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 690
 691         if (k->def) {
 692                 k->def_uni = true;
 693                 k->def_multi = true;
 694         }
 695         if (k->defmgmt)
 696                 k->def_multi = true;
 697
 698         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 699                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 700                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 701                         return -EINVAL;
 702         }
 703
 704         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 705                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 706                 int err = nla_parse_nested(
 707                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 708                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 709                                 nl80211_key_default_policy);
 710                 if (err)
 711                         return err;
 712
 713                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 714                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 715         }
 716
 717         return 0;
 718 }
 719
 720 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 721 {
 722         int err;
 723
 724         memset(k, 0, sizeof(*k));
 725         k->idx = -1;
 726         k->type = -1;
 727
 728         if (info->attrs[NL80211_ATTR_KEY])
 729                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 730         else
 731                 err = nl80211_parse_key_old(info, k);
 732
 733         if (err)
 734                 return err;
 735
 736         if (k->def && k->defmgmt)
 737                 return -EINVAL;
 738
 739         if (k->defmgmt) {
 740                 if (k->def_uni || !k->def_multi)
 741                         return -EINVAL;
 742         }
 743
 744         if (k->idx != -1) {
 745                 if (k->defmgmt) {
 746                         if (k->idx < 4 || k->idx > 5)
 747                                 return -EINVAL;
 748                 } else if (k->def) {
 749                         if (k->idx < 0 || k->idx > 3)
 750                                 return -EINVAL;
 751                 } else {
 752                         if (k->idx < 0 || k->idx > 5)
 753                                 return -EINVAL;
 754                 }
 755         }
 756
 757         return 0;
 758 }
 759
 760 static struct cfg80211_cached_keys *
 761 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 762                        struct nlattr *keys, bool *no_ht)
 763 {
 764         struct key_parse parse;
 765         struct nlattr *key;
 766         struct cfg80211_cached_keys *result;
 767         int rem, err, def = 0;
 768
 769         result = kzalloc(sizeof(*result), GFP_KERNEL);
 770         if (!result)
 771                 return ERR_PTR(-ENOMEM);
 772
 773         result->def = -1;
 774         result->defmgmt = -1;
 775
 776         nla_for_each_nested(key, keys, rem) {
 777                 memset(&parse, 0, sizeof(parse));
 778                 parse.idx = -1;
 779
 780                 err = nl80211_parse_key_new(key, &parse);
 781                 if (err)
 782                         goto error;
 783                 err = -EINVAL;
 784                 if (!parse.p.key)
 785                         goto error;
 786                 if (parse.idx < 0 || parse.idx > 4)
 787                         goto error;
 788                 if (parse.def) {
 789                         if (def)
 790                                 goto error;
 791                         def = 1;
 792                         result->def = parse.idx;
 793                         if (!parse.def_uni || !parse.def_multi)
 794                                 goto error;
 795                 } else if (parse.defmgmt)
 796                         goto error;
 797                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 798                                                      parse.idx, false, NULL);
 799                 if (err)
 800                         goto error;
 801                 result->params[parse.idx].cipher = parse.p.cipher;
 802                 result->params[parse.idx].key_len = parse.p.key_len;
 803                 result->params[parse.idx].key = result->data[parse.idx];
 804                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 805
 806                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 807                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 808                         if (no_ht)
 809                                 *no_ht = true;
 810                 }
 811         }
 812
 813         return result;
 814  error:
 815         kfree(result);
 816         return ERR_PTR(err);
 817 }
 818
 819 static int nl80211_key_allowed(struct wireless_dev *wdev)
 820 {
 821         ASSERT_WDEV_LOCK(wdev);
 822
 823         switch (wdev->iftype) {
 824         case NL80211_IFTYPE_AP:
 825         case NL80211_IFTYPE_AP_VLAN:
 826         case NL80211_IFTYPE_P2P_GO:
 827         case NL80211_IFTYPE_MESH_POINT:
 828                 break;
 829         case NL80211_IFTYPE_ADHOC:
 830                 if (!wdev->current_bss)
 831                         return -ENOLINK;
 832                 break;
 833         case NL80211_IFTYPE_STATION:
 834         case NL80211_IFTYPE_P2P_CLIENT:
 835                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 836                         return -ENOLINK;
 837                 break;
 838         default:
 839                 return -EINVAL;
 840         }
 841
 842         return 0;
 843 }
 844
 845 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 846 {
 847         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 848         int i;
 849
 850         if (!nl_modes)
 851                 goto nla_put_failure;
 852
 853         i = 0;
 854         while (ifmodes) {
 855                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 856                         goto nla_put_failure;
 857                 ifmodes >>= 1;
 858                 i++;
 859         }
 860
 861         nla_nest_end(msg, nl_modes);
 862         return 0;
 863
 864 nla_put_failure:
 865         return -ENOBUFS;
 866 }
 867
 868 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 869                                           struct sk_buff *msg,
 870                                           bool large)
 871 {
 872         struct nlattr *nl_combis;
 873         int i, j;
 874
 875         nl_combis = nla_nest_start(msg,
 876                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 877         if (!nl_combis)
 878                 goto nla_put_failure;
 879
 880         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 881                 const struct ieee80211_iface_combination *c;
 882                 struct nlattr *nl_combi, *nl_limits;
 883
 884                 c = &wiphy->iface_combinations[i];
 885
 886                 nl_combi = nla_nest_start(msg, i + 1);
 887                 if (!nl_combi)
 888                         goto nla_put_failure;
 889
 890                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 891                 if (!nl_limits)
 892                         goto nla_put_failure;
 893
 894                 for (j = 0; j < c->n_limits; j++) {
 895                         struct nlattr *nl_limit;
 896
 897                         nl_limit = nla_nest_start(msg, j + 1);
 898                         if (!nl_limit)
 899                                 goto nla_put_failure;
 900                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 901                                         c->limits[j].max))
 902                                 goto nla_put_failure;
 903                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 904                                                 c->limits[j].types))
 905                                 goto nla_put_failure;
 906                         nla_nest_end(msg, nl_limit);
 907                 }
 908
 909                 nla_nest_end(msg, nl_limits);
 910
 911                 if (c->beacon_int_infra_match &&
 912                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 913                         goto nla_put_failure;
 914                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 915                                 c->num_different_channels) ||
 916                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 917                                 c->max_interfaces))
 918                         goto nla_put_failure;
 919                 if (large &&
 920                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 921                                 c->radar_detect_widths))
 922                         goto nla_put_failure;
 923
 924                 nla_nest_end(msg, nl_combi);
 925         }
 926
 927         nla_nest_end(msg, nl_combis);
 928
 929         return 0;
 930 nla_put_failure:
 931         return -ENOBUFS;
 932 }
 933
 934 #ifdef CONFIG_PM
 935 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 936                                         struct sk_buff *msg)
 937 {
 938         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
 939         struct nlattr *nl_tcp;
 940
 941         if (!tcp)
 942                 return 0;
 943
 944         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 945         if (!nl_tcp)
 946                 return -ENOBUFS;
 947
 948         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 949                         tcp->data_payload_max))
 950                 return -ENOBUFS;
 951
 952         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 953                         tcp->data_payload_max))
 954                 return -ENOBUFS;
 955
 956         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 957                 return -ENOBUFS;
 958
 959         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 960                                 sizeof(*tcp->tok), tcp->tok))
 961                 return -ENOBUFS;
 962
 963         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 964                         tcp->data_interval_max))
 965                 return -ENOBUFS;
 966
 967         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 968                         tcp->wake_payload_max))
 969                 return -ENOBUFS;
 970
 971         nla_nest_end(msg, nl_tcp);
 972         return 0;
 973 }
 974
 975 static int nl80211_send_wowlan(struct sk_buff *msg,
 976                                struct cfg80211_registered_device *dev,
 977                                bool large)
 978 {
 979         struct nlattr *nl_wowlan;
 980
 981         if (!dev->wiphy.wowlan.flags && !dev->wiphy.wowlan.n_patterns)
 982                 return 0;
 983
 984         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 985         if (!nl_wowlan)
 986                 return -ENOBUFS;
 987
 988         if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
 989              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 990             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
 991              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 992             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 993              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 994             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 995              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 996             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 997              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 998             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 999              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1000             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1001              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1002             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1003              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1004                 return -ENOBUFS;
1005
1006         if (dev->wiphy.wowlan.n_patterns) {
1007                 struct nl80211_wowlan_pattern_support pat = {
1008                         .max_patterns = dev->wiphy.wowlan.n_patterns,
1009                         .min_pattern_len = dev->wiphy.wowlan.pattern_min_len,
1010                         .max_pattern_len = dev->wiphy.wowlan.pattern_max_len,
1011                         .max_pkt_offset = dev->wiphy.wowlan.max_pkt_offset,
1012                 };
1013
1014                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1015                             sizeof(pat), &pat))
1016                         return -ENOBUFS;
1017         }
1018
1019         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1020                 return -ENOBUFS;
1021
1022         nla_nest_end(msg, nl_wowlan);
1023
1024         return 0;
1025 }
1026 #endif
1027
1028 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1029                                       struct ieee80211_supported_band *sband)
1030 {
1031         struct nlattr *nl_rates, *nl_rate;
1032         struct ieee80211_rate *rate;
1033         int i;
1034
1035         /* add HT info */
1036         if (sband->ht_cap.ht_supported &&
1037             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1038                      sizeof(sband->ht_cap.mcs),
1039                      &sband->ht_cap.mcs) ||
1040              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1041                          sband->ht_cap.cap) ||
1042              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1043                         sband->ht_cap.ampdu_factor) ||
1044              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1045                         sband->ht_cap.ampdu_density)))
1046                 return -ENOBUFS;
1047
1048         /* add VHT info */
1049         if (sband->vht_cap.vht_supported &&
1050             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1051                      sizeof(sband->vht_cap.vht_mcs),
1052                      &sband->vht_cap.vht_mcs) ||
1053              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1054                          sband->vht_cap.cap)))
1055                 return -ENOBUFS;
1056
1057         /* add bitrates */
1058         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1059         if (!nl_rates)
1060                 return -ENOBUFS;
1061
1062         for (i = 0; i < sband->n_bitrates; i++) {
1063                 nl_rate = nla_nest_start(msg, i);
1064                 if (!nl_rate)
1065                         return -ENOBUFS;
1066
1067                 rate = &sband->bitrates[i];
1068                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1069                                 rate->bitrate))
1070                         return -ENOBUFS;
1071                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1072                     nla_put_flag(msg,
1073                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1074                         return -ENOBUFS;
1075
1076                 nla_nest_end(msg, nl_rate);
1077         }
1078
1079         nla_nest_end(msg, nl_rates);
1080
1081         return 0;
1082 }
1083
1084 static int
1085 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1086                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1087 {
1088         u16 stypes;
1089         struct nlattr *nl_ftypes, *nl_ifs;
1090         enum nl80211_iftype ift;
1091         int i;
1092
1093         if (!mgmt_stypes)
1094                 return 0;
1095
1096         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1097         if (!nl_ifs)
1098                 return -ENOBUFS;
1099
1100         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1101                 nl_ftypes = nla_nest_start(msg, ift);
1102                 if (!nl_ftypes)
1103                         return -ENOBUFS;
1104                 i = 0;
1105                 stypes = mgmt_stypes[ift].tx;
1106                 while (stypes) {
1107                         if ((stypes & 1) &&
1108                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1109                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1110                                 return -ENOBUFS;
1111                         stypes >>= 1;
1112                         i++;
1113                 }
1114                 nla_nest_end(msg, nl_ftypes);
1115         }
1116
1117         nla_nest_end(msg, nl_ifs);
1118
1119         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1120         if (!nl_ifs)
1121                 return -ENOBUFS;
1122
1123         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1124                 nl_ftypes = nla_nest_start(msg, ift);
1125                 if (!nl_ftypes)
1126                         return -ENOBUFS;
1127                 i = 0;
1128                 stypes = mgmt_stypes[ift].rx;
1129                 while (stypes) {
1130                         if ((stypes & 1) &&
1131                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1132                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1133                                 return -ENOBUFS;
1134                         stypes >>= 1;
1135                         i++;
1136                 }
1137                 nla_nest_end(msg, nl_ftypes);
1138         }
1139         nla_nest_end(msg, nl_ifs);
1140
1141         return 0;
1142 }
1143
1144 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1145                               struct sk_buff *msg, u32 portid, u32 seq,
1146                               int flags, bool split, long *split_start,
1147                               long *band_start, long *chan_start)
1148 {
1149         void *hdr;
1150         struct nlattr *nl_bands, *nl_band;
1151         struct nlattr *nl_freqs, *nl_freq;
1152         struct nlattr *nl_cmds;
1153         enum ieee80211_band band;
1154         struct ieee80211_channel *chan;
1155         int i;
1156         const struct ieee80211_txrx_stypes *mgmt_stypes =
1157                                 dev->wiphy.mgmt_stypes;
1158         long start = 0, start_chan = 0, start_band = 0;
1159         u32 features;
1160
1161         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1162         if (!hdr)
1163                 return -ENOBUFS;
1164
1165         /* allow always using the variables */
1166         if (!split) {
1167                 split_start = &start;
1168                 band_start = &start_band;
1169                 chan_start = &start_chan;
1170         }
1171
1172         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1173             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1174                            wiphy_name(&dev->wiphy)) ||
1175             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1176                         cfg80211_rdev_list_generation))
1177                 goto nla_put_failure;
1178
1179         switch (*split_start) {
1180         case 0:
1181                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1182                                dev->wiphy.retry_short) ||
1183                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1184                                dev->wiphy.retry_long) ||
1185                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1186                                 dev->wiphy.frag_threshold) ||
1187                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1188                                 dev->wiphy.rts_threshold) ||
1189                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1190                                dev->wiphy.coverage_class) ||
1191                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1192                                dev->wiphy.max_scan_ssids) ||
1193                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1194                                dev->wiphy.max_sched_scan_ssids) ||
1195                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1196                                 dev->wiphy.max_scan_ie_len) ||
1197                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1198                                 dev->wiphy.max_sched_scan_ie_len) ||
1199                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1200                                dev->wiphy.max_match_sets))
1201                         goto nla_put_failure;
1202
1203                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1204                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1205                         goto nla_put_failure;
1206                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1207                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1208                         goto nla_put_failure;
1209                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1210                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1211                         goto nla_put_failure;
1212                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1213                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1214                         goto nla_put_failure;
1215                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1216                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1217                         goto nla_put_failure;
1218                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1219                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1220                         goto nla_put_failure;
1221
1222                 (*split_start)++;
1223                 if (split)
1224                         break;
1225         case 1:
1226                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1227                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1228                             dev->wiphy.cipher_suites))
1229                         goto nla_put_failure;
1230
1231                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1232                                dev->wiphy.max_num_pmkids))
1233                         goto nla_put_failure;
1234
1235                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1236                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1237                         goto nla_put_failure;
1238
1239                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1240                                 dev->wiphy.available_antennas_tx) ||
1241                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1242                                 dev->wiphy.available_antennas_rx))
1243                         goto nla_put_failure;
1244
1245                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1246                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1247                                 dev->wiphy.probe_resp_offload))
1248                         goto nla_put_failure;
1249
1250                 if ((dev->wiphy.available_antennas_tx ||
1251                      dev->wiphy.available_antennas_rx) &&
1252                     dev->ops->get_antenna) {
1253                         u32 tx_ant = 0, rx_ant = 0;
1254                         int res;
1255                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1256                         if (!res) {
1257                                 if (nla_put_u32(msg,
1258                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1259                                                 tx_ant) ||
1260                                     nla_put_u32(msg,
1261                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1262                                                 rx_ant))
1263                                         goto nla_put_failure;
1264                         }
1265                 }
1266
1267                 (*split_start)++;
1268                 if (split)
1269                         break;
1270         case 2:
1271                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1272                                         dev->wiphy.interface_modes))
1273                                 goto nla_put_failure;
1274                 (*split_start)++;
1275                 if (split)
1276                         break;
1277         case 3:
1278                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1279                 if (!nl_bands)
1280                         goto nla_put_failure;
1281
1282                 for (band = *band_start; band < IEEE80211_NUM_BANDS; band++) {
1283                         struct ieee80211_supported_band *sband;
1284
1285                         sband = dev->wiphy.bands[band];
1286
1287                         if (!sband)
1288                                 continue;
1289
1290                         nl_band = nla_nest_start(msg, band);
1291                         if (!nl_band)
1292                                 goto nla_put_failure;
1293
1294                         switch (*chan_start) {
1295                         case 0:
1296                                 if (nl80211_send_band_rateinfo(msg, sband))
1297                                         goto nla_put_failure;
1298                                 (*chan_start)++;
1299                                 if (split)
1300                                         break;
1301                         default:
1302                                 /* add frequencies */
1303                                 nl_freqs = nla_nest_start(
1304                                         msg, NL80211_BAND_ATTR_FREQS);
1305                                 if (!nl_freqs)
1306                                         goto nla_put_failure;
1307
1308                                 for (i = *chan_start - 1;
1309                                      i < sband->n_channels;
1310                                      i++) {
1311                                         nl_freq = nla_nest_start(msg, i);
1312                                         if (!nl_freq)
1313                                                 goto nla_put_failure;
1314
1315                                         chan = &sband->channels[i];
1316
1317                                         if (nl80211_msg_put_channel(msg, chan,
1318                                                                     split))
1319                                                 goto nla_put_failure;
1320
1321                                         nla_nest_end(msg, nl_freq);
1322                                         if (split)
1323                                                 break;
1324                                 }
1325                                 if (i < sband->n_channels)
1326                                         *chan_start = i + 2;
1327                                 else
1328                                         *chan_start = 0;
1329                                 nla_nest_end(msg, nl_freqs);
1330                         }
1331
1332                         nla_nest_end(msg, nl_band);
1333
1334                         if (split) {
1335                                 /* start again here */
1336                                 if (*chan_start)
1337                                         band--;
1338                                 break;
1339                         }
1340                 }
1341                 nla_nest_end(msg, nl_bands);
1342
1343                 if (band < IEEE80211_NUM_BANDS)
1344                         *band_start = band + 1;
1345                 else
1346                         *band_start = 0;
1347
1348                 /* if bands & channels are done, continue outside */
1349                 if (*band_start == 0 && *chan_start == 0)
1350                         (*split_start)++;
1351                 if (split)
1352                         break;
1353         case 4:
1354                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1355                 if (!nl_cmds)
1356                         goto nla_put_failure;
1357
1358                 i = 0;
1359 #define CMD(op, n)                                                      \
1360                  do {                                                   \
1361                         if (dev->ops->op) {                             \
1362                                 i++;                                    \
1363                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1364                                         goto nla_put_failure;           \
1365                         }                                               \
1366                 } while (0)
1367
1368                 CMD(add_virtual_intf, NEW_INTERFACE);
1369                 CMD(change_virtual_intf, SET_INTERFACE);
1370                 CMD(add_key, NEW_KEY);
1371                 CMD(start_ap, START_AP);
1372                 CMD(add_station, NEW_STATION);
1373                 CMD(add_mpath, NEW_MPATH);
1374                 CMD(update_mesh_config, SET_MESH_CONFIG);
1375                 CMD(change_bss, SET_BSS);
1376                 CMD(auth, AUTHENTICATE);
1377                 CMD(assoc, ASSOCIATE);
1378                 CMD(deauth, DEAUTHENTICATE);
1379                 CMD(disassoc, DISASSOCIATE);
1380                 CMD(join_ibss, JOIN_IBSS);
1381                 CMD(join_mesh, JOIN_MESH);
1382                 CMD(set_pmksa, SET_PMKSA);
1383                 CMD(del_pmksa, DEL_PMKSA);
1384                 CMD(flush_pmksa, FLUSH_PMKSA);
1385                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1386                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1387                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1388                 CMD(mgmt_tx, FRAME);
1389                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1390                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1391                         i++;
1392                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1393                                 goto nla_put_failure;
1394                 }
1395                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1396                     dev->ops->join_mesh) {
1397                         i++;
1398                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1399                                 goto nla_put_failure;
1400                 }
1401                 CMD(set_wds_peer, SET_WDS_PEER);
1402                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1403                         CMD(tdls_mgmt, TDLS_MGMT);
1404                         CMD(tdls_oper, TDLS_OPER);
1405                 }
1406                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1407                         CMD(sched_scan_start, START_SCHED_SCAN);
1408                 CMD(probe_client, PROBE_CLIENT);
1409                 CMD(set_noack_map, SET_NOACK_MAP);
1410                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1411                         i++;
1412                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1413                                 goto nla_put_failure;
1414                 }
1415                 CMD(start_p2p_device, START_P2P_DEVICE);
1416                 CMD(set_mcast_rate, SET_MCAST_RATE);
1417
1418 #ifdef CONFIG_NL80211_TESTMODE
1419                 CMD(testmode_cmd, TESTMODE);
1420 #endif
1421
1422 #undef CMD
1423
1424                 if (dev->ops->connect || dev->ops->auth) {
1425                         i++;
1426                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1427                                 goto nla_put_failure;
1428                 }
1429
1430                 if (dev->ops->disconnect || dev->ops->deauth) {
1431                         i++;
1432                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1433                                 goto nla_put_failure;
1434                 }
1435
1436                 nla_nest_end(msg, nl_cmds);
1437                 (*split_start)++;
1438                 if (split)
1439                         break;
1440         case 5:
1441                 if (dev->ops->remain_on_channel &&
1442                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1443                     nla_put_u32(msg,
1444                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1445                                 dev->wiphy.max_remain_on_channel_duration))
1446                         goto nla_put_failure;
1447
1448                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1449                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1450                         goto nla_put_failure;
1451
1452                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1453                         goto nla_put_failure;
1454                 (*split_start)++;
1455                 if (split)
1456                         break;
1457         case 6:
1458 #ifdef CONFIG_PM
1459                 if (nl80211_send_wowlan(msg, dev, split))
1460                         goto nla_put_failure;
1461                 (*split_start)++;
1462                 if (split)
1463                         break;
1464 #else
1465                 (*split_start)++;
1466 #endif
1467         case 7:
1468                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1469                                         dev->wiphy.software_iftypes))
1470                         goto nla_put_failure;
1471
1472                 if (nl80211_put_iface_combinations(&dev->wiphy, msg, split))
1473                         goto nla_put_failure;
1474
1475                 (*split_start)++;
1476                 if (split)
1477                         break;
1478         case 8:
1479                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1480                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1481                                 dev->wiphy.ap_sme_capa))
1482                         goto nla_put_failure;
1483
1484                 features = dev->wiphy.features;
1485                 /*
1486                  * We can only add the per-channel limit information if the
1487                  * dump is split, otherwise it makes it too big. Therefore
1488                  * only advertise it in that case.
1489                  */
1490                 if (split)
1491                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1492                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1493                         goto nla_put_failure;
1494
1495                 if (dev->wiphy.ht_capa_mod_mask &&
1496                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1497                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1498                             dev->wiphy.ht_capa_mod_mask))
1499                         goto nla_put_failure;
1500
1501                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1502                     dev->wiphy.max_acl_mac_addrs &&
1503                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1504                                 dev->wiphy.max_acl_mac_addrs))
1505                         goto nla_put_failure;
1506
1507                 /*
1508                  * Any information below this point is only available to
1509                  * applications that can deal with it being split. This
1510                  * helps ensure that newly added capabilities don't break
1511                  * older tools by overrunning their buffers.
1512                  *
1513                  * We still increment split_start so that in the split
1514                  * case we'll continue with more data in the next round,
1515                  * but break unconditionally so unsplit data stops here.
1516                  */
1517                 (*split_start)++;
1518                 break;
1519         case 9:
1520                 if (dev->wiphy.extended_capabilities &&
1521                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1522                              dev->wiphy.extended_capabilities_len,
1523                              dev->wiphy.extended_capabilities) ||
1524                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1525                              dev->wiphy.extended_capabilities_len,
1526                              dev->wiphy.extended_capabilities_mask)))
1527                         goto nla_put_failure;
1528
1529                 if (dev->wiphy.vht_capa_mod_mask &&
1530                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1531                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1532                             dev->wiphy.vht_capa_mod_mask))
1533                         goto nla_put_failure;
1534
1535                 /* done */
1536                 *split_start = 0;
1537                 break;
1538         }
1539         return genlmsg_end(msg, hdr);
1540
1541  nla_put_failure:
1542         genlmsg_cancel(msg, hdr);
1543         return -EMSGSIZE;
1544 }
1545
1546 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1547 {
1548         int idx = 0, ret;
1549         int start = cb->args[0];
1550         struct cfg80211_registered_device *dev;
1551         s64 filter_wiphy = -1;
1552         bool split = false;
1553         struct nlattr **tb = nl80211_fam.attrbuf;
1554         int res;
1555
1556         mutex_lock(&cfg80211_mutex);
1557         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1558                           tb, nl80211_fam.maxattr, nl80211_policy);
1559         if (res == 0) {
1560                 split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1561                 if (tb[NL80211_ATTR_WIPHY])
1562                         filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1563                 if (tb[NL80211_ATTR_WDEV])
1564                         filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1565                 if (tb[NL80211_ATTR_IFINDEX]) {
1566                         struct net_device *netdev;
1567                         int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1568
1569                         netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1570                         if (!netdev) {
1571                                 mutex_unlock(&cfg80211_mutex);
1572                                 return -ENODEV;
1573                         }
1574                         if (netdev->ieee80211_ptr) {
1575                                 dev = wiphy_to_dev(
1576                                         netdev->ieee80211_ptr->wiphy);
1577                                 filter_wiphy = dev->wiphy_idx;
1578                         }
1579                         dev_put(netdev);
1580                 }
1581         }
1582
1583         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1584                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1585                         continue;
1586                 if (++idx <= start)
1587                         continue;
1588                 if (filter_wiphy != -1 && dev->wiphy_idx != filter_wiphy)
1589                         continue;
1590                 /* attempt to fit multiple wiphy data chunks into the skb */
1591                 do {
1592                         ret = nl80211_send_wiphy(dev, skb,
1593                                                  NETLINK_CB(cb->skb).portid,
1594                                                  cb->nlh->nlmsg_seq,
1595                                                  NLM_F_MULTI,
1596                                                  split, &cb->args[1],
1597                                                  &cb->args[2],
1598                                                  &cb->args[3]);
1599                         if (ret < 0) {
1600                                 /*
1601                                  * If sending the wiphy data didn't fit (ENOBUFS
1602                                  * or EMSGSIZE returned), this SKB is still
1603                                  * empty (so it's not too big because another
1604                                  * wiphy dataset is already in the skb) and
1605                                  * we've not tried to adjust the dump allocation
1606                                  * yet ... then adjust the alloc size to be
1607                                  * bigger, and return 1 but with the empty skb.
1608                                  * This results in an empty message being RX'ed
1609                                  * in userspace, but that is ignored.
1610                                  *
1611                                  * We can then retry with the larger buffer.
1612                                  */
1613                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1614                                     !skb->len &&
1615                                     cb->min_dump_alloc < 4096) {
1616                                         cb->min_dump_alloc = 4096;
1617                                         mutex_unlock(&cfg80211_mutex);
1618                                         return 1;
1619                                 }
1620                                 idx--;
1621                                 break;
1622                         }
1623                 } while (cb->args[1] > 0);
1624                 break;
1625         }
1626         mutex_unlock(&cfg80211_mutex);
1627
1628         cb->args[0] = idx;
1629
1630         return skb->len;
1631 }
1632
1633 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1634 {
1635         struct sk_buff *msg;
1636         struct cfg80211_registered_device *dev = info->user_ptr[0];
1637
1638         msg = nlmsg_new(4096, GFP_KERNEL);
1639         if (!msg)
1640                 return -ENOMEM;
1641
1642         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1643                                false, NULL, NULL, NULL) < 0) {
1644                 nlmsg_free(msg);
1645                 return -ENOBUFS;
1646         }
1647
1648         return genlmsg_reply(msg, info);
1649 }
1650
1651 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1652         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1653         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1654         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1655         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1656         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1657 };
1658
1659 static int parse_txq_params(struct nlattr *tb[],
1660                             struct ieee80211_txq_params *txq_params)
1661 {
1662         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1663             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1664             !tb[NL80211_TXQ_ATTR_AIFS])
1665                 return -EINVAL;
1666
1667         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1668         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1669         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1670         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1671         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1672
1673         if (txq_params->ac >= NL80211_NUM_ACS)
1674                 return -EINVAL;
1675
1676         return 0;
1677 }
1678
1679 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1680 {
1681         /*
1682          * You can only set the channel explicitly for WDS interfaces,
1683          * all others have their channel managed via their respective
1684          * "establish a connection" command (connect, join, ...)
1685          *
1686          * For AP/GO and mesh mode, the channel can be set with the
1687          * channel userspace API, but is only stored and passed to the
1688          * low-level driver when the AP starts or the mesh is joined.
1689          * This is for backward compatibility, userspace can also give
1690          * the channel in the start-ap or join-mesh commands instead.
1691          *
1692          * Monitors are special as they are normally slaved to
1693          * whatever else is going on, so they have their own special
1694          * operation to set the monitor channel if possible.
1695          */
1696         return !wdev ||
1697                 wdev->iftype == NL80211_IFTYPE_AP ||
1698                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1699                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1700                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1701 }
1702
1703 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1704                                  struct genl_info *info,
1705                                  struct cfg80211_chan_def *chandef)
1706 {
1707         u32 control_freq;
1708
1709         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1710                 return -EINVAL;
1711
1712         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1713
1714         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1715         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1716         chandef->center_freq1 = control_freq;
1717         chandef->center_freq2 = 0;
1718
1719         /* Primary channel not allowed */
1720         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1721                 return -EINVAL;
1722
1723         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1724                 enum nl80211_channel_type chantype;
1725
1726                 chantype = nla_get_u32(
1727                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1728
1729                 switch (chantype) {
1730                 case NL80211_CHAN_NO_HT:
1731                 case NL80211_CHAN_HT20:
1732                 case NL80211_CHAN_HT40PLUS:
1733                 case NL80211_CHAN_HT40MINUS:
1734                         cfg80211_chandef_create(chandef, chandef->chan,
1735                                                 chantype);
1736                         break;
1737                 default:
1738                         return -EINVAL;
1739                 }
1740         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1741                 chandef->width =
1742                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1743                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1744                         chandef->center_freq1 =
1745                                 nla_get_u32(
1746                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1747                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1748                         chandef->center_freq2 =
1749                                 nla_get_u32(
1750                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1751         }
1752
1753         if (!cfg80211_chandef_valid(chandef))
1754                 return -EINVAL;
1755
1756         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1757                                      IEEE80211_CHAN_DISABLED))
1758                 return -EINVAL;
1759
1760         return 0;
1761 }
1762
1763 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1764                                  struct wireless_dev *wdev,
1765                                  struct genl_info *info)
1766 {
1767         struct cfg80211_chan_def chandef;
1768         int result;
1769         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1770
1771         if (wdev)
1772                 iftype = wdev->iftype;
1773
1774         if (!nl80211_can_set_dev_channel(wdev))
1775                 return -EOPNOTSUPP;
1776
1777         result = nl80211_parse_chandef(rdev, info, &chandef);
1778         if (result)
1779                 return result;
1780
1781         mutex_lock(&rdev->devlist_mtx);
1782         switch (iftype) {
1783         case NL80211_IFTYPE_AP:
1784         case NL80211_IFTYPE_P2P_GO:
1785                 if (wdev->beacon_interval) {
1786                         result = -EBUSY;
1787                         break;
1788                 }
1789                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1790                         result = -EINVAL;
1791                         break;
1792                 }
1793                 wdev->preset_chandef = chandef;
1794                 result = 0;
1795                 break;
1796         case NL80211_IFTYPE_MESH_POINT:
1797                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1798                 break;
1799         case NL80211_IFTYPE_MONITOR:
1800                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1801                 break;
1802         default:
1803                 result = -EINVAL;
1804         }
1805         mutex_unlock(&rdev->devlist_mtx);
1806
1807         return result;
1808 }
1809
1810 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1811 {
1812         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1813         struct net_device *netdev = info->user_ptr[1];
1814
1815         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1816 }
1817
1818 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1819 {
1820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1821         struct net_device *dev = info->user_ptr[1];
1822         struct wireless_dev *wdev = dev->ieee80211_ptr;
1823         const u8 *bssid;
1824
1825         if (!info->attrs[NL80211_ATTR_MAC])
1826                 return -EINVAL;
1827
1828         if (netif_running(dev))
1829                 return -EBUSY;
1830
1831         if (!rdev->ops->set_wds_peer)
1832                 return -EOPNOTSUPP;
1833
1834         if (wdev->iftype != NL80211_IFTYPE_WDS)
1835                 return -EOPNOTSUPP;
1836
1837         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1838         return rdev_set_wds_peer(rdev, dev, bssid);
1839 }
1840
1841
1842 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1843 {
1844         struct cfg80211_registered_device *rdev;
1845         struct net_device *netdev = NULL;
1846         struct wireless_dev *wdev;
1847         int result = 0, rem_txq_params = 0;
1848         struct nlattr *nl_txq_params;
1849         u32 changed;
1850         u8 retry_short = 0, retry_long = 0;
1851         u32 frag_threshold = 0, rts_threshold = 0;
1852         u8 coverage_class = 0;
1853
1854         /*
1855          * Try to find the wiphy and netdev. Normally this
1856          * function shouldn't need the netdev, but this is
1857          * done for backward compatibility -- previously
1858          * setting the channel was done per wiphy, but now
1859          * it is per netdev. Previous userland like hostapd
1860          * also passed a netdev to set_wiphy, so that it is
1861          * possible to let that go to the right netdev!
1862          */
1863         mutex_lock(&cfg80211_mutex);
1864
1865         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1866                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1867
1868                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1869                 if (netdev && netdev->ieee80211_ptr) {
1870                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1871                         mutex_lock(&rdev->mtx);
1872                 } else
1873                         netdev = NULL;
1874         }
1875
1876         if (!netdev) {
1877                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1878                                                   info->attrs);
1879                 if (IS_ERR(rdev)) {
1880                         mutex_unlock(&cfg80211_mutex);
1881                         return PTR_ERR(rdev);
1882                 }
1883                 wdev = NULL;
1884                 netdev = NULL;
1885                 result = 0;
1886
1887                 mutex_lock(&rdev->mtx);
1888         } else
1889                 wdev = netdev->ieee80211_ptr;
1890
1891         /*
1892          * end workaround code, by now the rdev is available
1893          * and locked, and wdev may or may not be NULL.
1894          */
1895
1896         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1897                 result = cfg80211_dev_rename(
1898                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1899
1900         mutex_unlock(&cfg80211_mutex);
1901
1902         if (result)
1903                 goto bad_res;
1904
1905         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1906                 struct ieee80211_txq_params txq_params;
1907                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1908
1909                 if (!rdev->ops->set_txq_params) {
1910                         result = -EOPNOTSUPP;
1911                         goto bad_res;
1912                 }
1913
1914                 if (!netdev) {
1915                         result = -EINVAL;
1916                         goto bad_res;
1917                 }
1918
1919                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1920                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1921                         result = -EINVAL;
1922                         goto bad_res;
1923                 }
1924
1925                 if (!netif_running(netdev)) {
1926                         result = -ENETDOWN;
1927                         goto bad_res;
1928                 }
1929
1930                 nla_for_each_nested(nl_txq_params,
1931                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1932                                     rem_txq_params) {
1933                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1934                                   nla_data(nl_txq_params),
1935                                   nla_len(nl_txq_params),
1936                                   txq_params_policy);
1937                         result = parse_txq_params(tb, &txq_params);
1938                         if (result)
1939                                 goto bad_res;
1940
1941                         result = rdev_set_txq_params(rdev, netdev,
1942                                                      &txq_params);
1943                         if (result)
1944                                 goto bad_res;
1945                 }
1946         }
1947
1948         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1949                 result = __nl80211_set_channel(rdev,
1950                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1951                                 info);
1952                 if (result)
1953                         goto bad_res;
1954         }
1955
1956         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1957                 struct wireless_dev *txp_wdev = wdev;
1958                 enum nl80211_tx_power_setting type;
1959                 int idx, mbm = 0;
1960
1961                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1962                         txp_wdev = NULL;
1963
1964                 if (!rdev->ops->set_tx_power) {
1965                         result = -EOPNOTSUPP;
1966                         goto bad_res;
1967                 }
1968
1969                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1970                 type = nla_get_u32(info->attrs[idx]);
1971
1972                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1973                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1974                         result = -EINVAL;
1975                         goto bad_res;
1976                 }
1977
1978                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1979                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1980                         mbm = nla_get_u32(info->attrs[idx]);
1981                 }
1982
1983                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1984                 if (result)
1985                         goto bad_res;
1986         }
1987
1988         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1989             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1990                 u32 tx_ant, rx_ant;
1991                 if ((!rdev->wiphy.available_antennas_tx &&
1992                      !rdev->wiphy.available_antennas_rx) ||
1993                     !rdev->ops->set_antenna) {
1994                         result = -EOPNOTSUPP;
1995                         goto bad_res;
1996                 }
1997
1998                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1999                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2000
2001                 /* reject antenna configurations which don't match the
2002                  * available antenna masks, except for the "all" mask */
2003                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2004                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2005                         result = -EINVAL;
2006                         goto bad_res;
2007                 }
2008
2009                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2010                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2011
2012                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2013                 if (result)
2014                         goto bad_res;
2015         }
2016
2017         changed = 0;
2018
2019         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2020                 retry_short = nla_get_u8(
2021                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2022                 if (retry_short == 0) {
2023                         result = -EINVAL;
2024                         goto bad_res;
2025                 }
2026                 changed |= WIPHY_PARAM_RETRY_SHORT;
2027         }
2028
2029         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2030                 retry_long = nla_get_u8(
2031                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2032                 if (retry_long == 0) {
2033                         result = -EINVAL;
2034                         goto bad_res;
2035                 }
2036                 changed |= WIPHY_PARAM_RETRY_LONG;
2037         }
2038
2039         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2040                 frag_threshold = nla_get_u32(
2041                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2042                 if (frag_threshold < 256) {
2043                         result = -EINVAL;
2044                         goto bad_res;
2045                 }
2046                 if (frag_threshold != (u32) -1) {
2047                         /*
2048                          * Fragments (apart from the last one) are required to
2049                          * have even length. Make the fragmentation code
2050                          * simpler by stripping LSB should someone try to use
2051                          * odd threshold value.
2052                          */
2053                         frag_threshold &= ~0x1;
2054                 }
2055                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2056         }
2057
2058         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2059                 rts_threshold = nla_get_u32(
2060                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2061                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2062         }
2063
2064         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2065                 coverage_class = nla_get_u8(
2066                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2067                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2068         }
2069
2070         if (changed) {
2071                 u8 old_retry_short, old_retry_long;
2072                 u32 old_frag_threshold, old_rts_threshold;
2073                 u8 old_coverage_class;
2074
2075                 if (!rdev->ops->set_wiphy_params) {
2076                         result = -EOPNOTSUPP;
2077                         goto bad_res;
2078                 }
2079
2080                 old_retry_short = rdev->wiphy.retry_short;
2081                 old_retry_long = rdev->wiphy.retry_long;
2082                 old_frag_threshold = rdev->wiphy.frag_threshold;
2083                 old_rts_threshold = rdev->wiphy.rts_threshold;
2084                 old_coverage_class = rdev->wiphy.coverage_class;
2085
2086                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2087                         rdev->wiphy.retry_short = retry_short;
2088                 if (changed & WIPHY_PARAM_RETRY_LONG)
2089                         rdev->wiphy.retry_long = retry_long;
2090                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2091                         rdev->wiphy.frag_threshold = frag_threshold;
2092                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2093                         rdev->wiphy.rts_threshold = rts_threshold;
2094                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2095                         rdev->wiphy.coverage_class = coverage_class;
2096
2097                 result = rdev_set_wiphy_params(rdev, changed);
2098                 if (result) {
2099                         rdev->wiphy.retry_short = old_retry_short;
2100                         rdev->wiphy.retry_long = old_retry_long;
2101                         rdev->wiphy.frag_threshold = old_frag_threshold;
2102                         rdev->wiphy.rts_threshold = old_rts_threshold;
2103                         rdev->wiphy.coverage_class = old_coverage_class;
2104                 }
2105         }
2106
2107  bad_res:
2108         mutex_unlock(&rdev->mtx);
2109         if (netdev)
2110                 dev_put(netdev);
2111         return result;
2112 }
2113
2114 static inline u64 wdev_id(struct wireless_dev *wdev)
2115 {
2116         return (u64)wdev->identifier |
2117                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2118 }
2119
2120 static int nl80211_send_chandef(struct sk_buff *msg,
2121                                  struct cfg80211_chan_def *chandef)
2122 {
2123         WARN_ON(!cfg80211_chandef_valid(chandef));
2124
2125         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2126                         chandef->chan->center_freq))
2127                 return -ENOBUFS;
2128         switch (chandef->width) {
2129         case NL80211_CHAN_WIDTH_20_NOHT:
2130         case NL80211_CHAN_WIDTH_20:
2131         case NL80211_CHAN_WIDTH_40:
2132                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2133                                 cfg80211_get_chandef_type(chandef)))
2134                         return -ENOBUFS;
2135                 break;
2136         default:
2137                 break;
2138         }
2139         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2140                 return -ENOBUFS;
2141         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2142                 return -ENOBUFS;
2143         if (chandef->center_freq2 &&
2144             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2145                 return -ENOBUFS;
2146         return 0;
2147 }
2148
2149 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2150                               struct cfg80211_registered_device *rdev,
2151                               struct wireless_dev *wdev)
2152 {
2153         struct net_device *dev = wdev->netdev;
2154         void *hdr;
2155
2156         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2157         if (!hdr)
2158                 return -1;
2159
2160         if (dev &&
2161             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2162              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2163                 goto nla_put_failure;
2164
2165         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2166             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2167             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2168             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2169             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2170                         rdev->devlist_generation ^
2171                         (cfg80211_rdev_list_generation << 2)))
2172                 goto nla_put_failure;
2173
2174         if (rdev->ops->get_channel) {
2175                 int ret;
2176                 struct cfg80211_chan_def chandef;
2177
2178                 ret = rdev_get_channel(rdev, wdev, &chandef);
2179                 if (ret == 0) {
2180                         if (nl80211_send_chandef(msg, &chandef))
2181                                 goto nla_put_failure;
2182                 }
2183         }
2184
2185         if (wdev->ssid_len) {
2186                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2187                         goto nla_put_failure;
2188         }
2189
2190         return genlmsg_end(msg, hdr);
2191
2192  nla_put_failure:
2193         genlmsg_cancel(msg, hdr);
2194         return -EMSGSIZE;
2195 }
2196
2197 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2198 {
2199         int wp_idx = 0;
2200         int if_idx = 0;
2201         int wp_start = cb->args[0];
2202         int if_start = cb->args[1];
2203         struct cfg80211_registered_device *rdev;
2204         struct wireless_dev *wdev;
2205
2206         mutex_lock(&cfg80211_mutex);
2207         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2208                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2209                         continue;
2210                 if (wp_idx < wp_start) {
2211                         wp_idx++;
2212                         continue;
2213                 }
2214                 if_idx = 0;
2215
2216                 mutex_lock(&rdev->devlist_mtx);
2217                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2218                         if (if_idx < if_start) {
2219                                 if_idx++;
2220                                 continue;
2221                         }
2222                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2223                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2224                                                rdev, wdev) < 0) {
2225                                 mutex_unlock(&rdev->devlist_mtx);
2226                                 goto out;
2227                         }
2228                         if_idx++;
2229                 }
2230                 mutex_unlock(&rdev->devlist_mtx);
2231
2232                 wp_idx++;
2233         }
2234  out:
2235         mutex_unlock(&cfg80211_mutex);
2236
2237         cb->args[0] = wp_idx;
2238         cb->args[1] = if_idx;
2239
2240         return skb->len;
2241 }
2242
2243 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2244 {
2245         struct sk_buff *msg;
2246         struct cfg80211_registered_device *dev = info->user_ptr[0];
2247         struct wireless_dev *wdev = info->user_ptr[1];
2248
2249         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2250         if (!msg)
2251                 return -ENOMEM;
2252
2253         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2254                                dev, wdev) < 0) {
2255                 nlmsg_free(msg);
2256                 return -ENOBUFS;
2257         }
2258
2259         return genlmsg_reply(msg, info);
2260 }
2261
2262 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2263         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2264         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2265         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2266         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2267         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2268 };
2269
2270 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2271 {
2272         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2273         int flag;
2274
2275         *mntrflags = 0;
2276
2277         if (!nla)
2278                 return -EINVAL;
2279
2280         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2281                              nla, mntr_flags_policy))
2282                 return -EINVAL;
2283
2284         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2285                 if (flags[flag])
2286                         *mntrflags |= (1<<flag);
2287
2288         return 0;
2289 }
2290
2291 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2292                                struct net_device *netdev, u8 use_4addr,
2293                                enum nl80211_iftype iftype)
2294 {
2295         if (!use_4addr) {
2296                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2297                         return -EBUSY;
2298                 return 0;
2299         }
2300
2301         switch (iftype) {
2302         case NL80211_IFTYPE_AP_VLAN:
2303                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2304                         return 0;
2305                 break;
2306         case NL80211_IFTYPE_STATION:
2307                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2308                         return 0;
2309                 break;
2310         default:
2311                 break;
2312         }
2313
2314         return -EOPNOTSUPP;
2315 }
2316
2317 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2318 {
2319         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2320         struct vif_params params;
2321         int err;
2322         enum nl80211_iftype otype, ntype;
2323         struct net_device *dev = info->user_ptr[1];
2324         u32 _flags, *flags = NULL;
2325         bool change = false;
2326
2327         memset(&params, 0, sizeof(params));
2328
2329         otype = ntype = dev->ieee80211_ptr->iftype;
2330
2331         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2332                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2333                 if (otype != ntype)
2334                         change = true;
2335                 if (ntype > NL80211_IFTYPE_MAX)
2336                         return -EINVAL;
2337         }
2338
2339         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2340                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2341
2342                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2343                         return -EINVAL;
2344                 if (netif_running(dev))
2345                         return -EBUSY;
2346
2347                 wdev_lock(wdev);
2348                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2349                              IEEE80211_MAX_MESH_ID_LEN);
2350                 wdev->mesh_id_up_len =
2351                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2352                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2353                        wdev->mesh_id_up_len);
2354                 wdev_unlock(wdev);
2355         }
2356
2357         if (info->attrs[NL80211_ATTR_4ADDR]) {
2358                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2359                 change = true;
2360                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2361                 if (err)
2362                         return err;
2363         } else {
2364                 params.use_4addr = -1;
2365         }
2366
2367         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2368                 if (ntype != NL80211_IFTYPE_MONITOR)
2369                         return -EINVAL;
2370                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2371                                           &_flags);
2372                 if (err)
2373                         return err;
2374
2375                 flags = &_flags;
2376                 change = true;
2377         }
2378
2379         if (change)
2380                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2381         else
2382                 err = 0;
2383
2384         if (!err && params.use_4addr != -1)
2385                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2386
2387         return err;
2388 }
2389
2390 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2391 {
2392         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2393         struct vif_params params;
2394         struct wireless_dev *wdev;
2395         struct sk_buff *msg;
2396         int err;
2397         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2398         u32 flags;
2399
2400         memset(&params, 0, sizeof(params));
2401
2402         if (!info->attrs[NL80211_ATTR_IFNAME])
2403                 return -EINVAL;
2404
2405         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2406                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2407                 if (type > NL80211_IFTYPE_MAX)
2408                         return -EINVAL;
2409         }
2410
2411         if (!rdev->ops->add_virtual_intf ||
2412             !(rdev->wiphy.interface_modes & (1 << type)))
2413                 return -EOPNOTSUPP;
2414
2415         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2416                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2417                            ETH_ALEN);
2418                 if (!is_valid_ether_addr(params.macaddr))
2419                         return -EADDRNOTAVAIL;
2420         }
2421
2422         if (info->attrs[NL80211_ATTR_4ADDR]) {
2423                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2424                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2425                 if (err)
2426                         return err;
2427         }
2428
2429         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2430         if (!msg)
2431                 return -ENOMEM;
2432
2433         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2434                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2435                                   &flags);
2436         wdev = rdev_add_virtual_intf(rdev,
2437                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2438                                 type, err ? NULL : &flags, &params);
2439         if (IS_ERR(wdev)) {
2440                 nlmsg_free(msg);
2441                 return PTR_ERR(wdev);
2442         }
2443
2444         switch (type) {
2445         case NL80211_IFTYPE_MESH_POINT:
2446                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2447                         break;
2448                 wdev_lock(wdev);
2449                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2450                              IEEE80211_MAX_MESH_ID_LEN);
2451                 wdev->mesh_id_up_len =
2452                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2453                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2454                        wdev->mesh_id_up_len);
2455                 wdev_unlock(wdev);
2456                 break;
2457         case NL80211_IFTYPE_P2P_DEVICE:
2458                 /*
2459                  * P2P Device doesn't have a netdev, so doesn't go
2460                  * through the netdev notifier and must be added here
2461                  */
2462                 mutex_init(&wdev->mtx);
2463                 INIT_LIST_HEAD(&wdev->event_list);
2464                 spin_lock_init(&wdev->event_lock);
2465                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2466                 spin_lock_init(&wdev->mgmt_registrations_lock);
2467
2468                 mutex_lock(&rdev->devlist_mtx);
2469                 wdev->identifier = ++rdev->wdev_id;
2470                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2471                 rdev->devlist_generation++;
2472                 mutex_unlock(&rdev->devlist_mtx);
2473                 break;
2474         default:
2475                 break;
2476         }
2477
2478         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2479                                rdev, wdev) < 0) {
2480                 nlmsg_free(msg);
2481                 return -ENOBUFS;
2482         }
2483
2484         return genlmsg_reply(msg, info);
2485 }
2486
2487 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2488 {
2489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2490         struct wireless_dev *wdev = info->user_ptr[1];
2491
2492         if (!rdev->ops->del_virtual_intf)
2493                 return -EOPNOTSUPP;
2494
2495         /*
2496          * If we remove a wireless device without a netdev then clear
2497          * user_ptr[1] so that nl80211_post_doit won't dereference it
2498          * to check if it needs to do dev_put(). Otherwise it crashes
2499          * since the wdev has been freed, unlike with a netdev where
2500          * we need the dev_put() for the netdev to really be freed.
2501          */
2502         if (!wdev->netdev)
2503                 info->user_ptr[1] = NULL;
2504
2505         return rdev_del_virtual_intf(rdev, wdev);
2506 }
2507
2508 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2509 {
2510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2511         struct net_device *dev = info->user_ptr[1];
2512         u16 noack_map;
2513
2514         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2515                 return -EINVAL;
2516
2517         if (!rdev->ops->set_noack_map)
2518                 return -EOPNOTSUPP;
2519
2520         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2521
2522         return rdev_set_noack_map(rdev, dev, noack_map);
2523 }
2524
2525 struct get_key_cookie {
2526         struct sk_buff *msg;
2527         int error;
2528         int idx;
2529 };
2530
2531 static void get_key_callback(void *c, struct key_params *params)
2532 {
2533         struct nlattr *key;
2534         struct get_key_cookie *cookie = c;
2535
2536         if ((params->key &&
2537              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2538                      params->key_len, params->key)) ||
2539             (params->seq &&
2540              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2541                      params->seq_len, params->seq)) ||
2542             (params->cipher &&
2543              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2544                          params->cipher)))
2545                 goto nla_put_failure;
2546
2547         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2548         if (!key)
2549                 goto nla_put_failure;
2550
2551         if ((params->key &&
2552              nla_put(cookie->msg, NL80211_KEY_DATA,
2553                      params->key_len, params->key)) ||
2554             (params->seq &&
2555              nla_put(cookie->msg, NL80211_KEY_SEQ,
2556                      params->seq_len, params->seq)) ||
2557             (params->cipher &&
2558              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2559                          params->cipher)))
2560                 goto nla_put_failure;
2561
2562         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2563                 goto nla_put_failure;
2564
2565         nla_nest_end(cookie->msg, key);
2566
2567         return;
2568  nla_put_failure:
2569         cookie->error = 1;
2570 }
2571
2572 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2573 {
2574         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2575         int err;
2576         struct net_device *dev = info->user_ptr[1];
2577         u8 key_idx = 0;
2578         const u8 *mac_addr = NULL;
2579         bool pairwise;
2580         struct get_key_cookie cookie = {
2581                 .error = 0,
2582         };
2583         void *hdr;
2584         struct sk_buff *msg;
2585
2586         if (info->attrs[NL80211_ATTR_KEY_IDX])
2587                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2588
2589         if (key_idx > 5)
2590                 return -EINVAL;
2591
2592         if (info->attrs[NL80211_ATTR_MAC])
2593                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2594
2595         pairwise = !!mac_addr;
2596         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2597                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2598                 if (kt >= NUM_NL80211_KEYTYPES)
2599                         return -EINVAL;
2600                 if (kt != NL80211_KEYTYPE_GROUP &&
2601                     kt != NL80211_KEYTYPE_PAIRWISE)
2602                         return -EINVAL;
2603                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2604         }
2605
2606         if (!rdev->ops->get_key)
2607                 return -EOPNOTSUPP;
2608
2609         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2610         if (!msg)
2611                 return -ENOMEM;
2612
2613         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2614                              NL80211_CMD_NEW_KEY);
2615         if (IS_ERR(hdr))
2616                 return PTR_ERR(hdr);
2617
2618         cookie.msg = msg;
2619         cookie.idx = key_idx;
2620
2621         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2622             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2623                 goto nla_put_failure;
2624         if (mac_addr &&
2625             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2626                 goto nla_put_failure;
2627
2628         if (pairwise && mac_addr &&
2629             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2630                 return -ENOENT;
2631
2632         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2633                            get_key_callback);
2634
2635         if (err)
2636                 goto free_msg;
2637
2638         if (cookie.error)
2639                 goto nla_put_failure;
2640
2641         genlmsg_end(msg, hdr);
2642         return genlmsg_reply(msg, info);
2643
2644  nla_put_failure:
2645         err = -ENOBUFS;
2646  free_msg:
2647         nlmsg_free(msg);
2648         return err;
2649 }
2650
2651 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2652 {
2653         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2654         struct key_parse key;
2655         int err;
2656         struct net_device *dev = info->user_ptr[1];
2657
2658         err = nl80211_parse_key(info, &key);
2659         if (err)
2660                 return err;
2661
2662         if (key.idx < 0)
2663                 return -EINVAL;
2664
2665         /* only support setting default key */
2666         if (!key.def && !key.defmgmt)
2667                 return -EINVAL;
2668
2669         wdev_lock(dev->ieee80211_ptr);
2670
2671         if (key.def) {
2672                 if (!rdev->ops->set_default_key) {
2673                         err = -EOPNOTSUPP;
2674                         goto out;
2675                 }
2676
2677                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2678                 if (err)
2679                         goto out;
2680
2681                 err = rdev_set_default_key(rdev, dev, key.idx,
2682                                                  key.def_uni, key.def_multi);
2683
2684                 if (err)
2685                         goto out;
2686
2687 #ifdef CONFIG_CFG80211_WEXT
2688                 dev->ieee80211_ptr->wext.default_key = key.idx;
2689 #endif
2690         } else {
2691                 if (key.def_uni || !key.def_multi) {
2692                         err = -EINVAL;
2693                         goto out;
2694                 }
2695
2696                 if (!rdev->ops->set_default_mgmt_key) {
2697                         err = -EOPNOTSUPP;
2698                         goto out;
2699                 }
2700
2701                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2702                 if (err)
2703                         goto out;
2704
2705                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2706                 if (err)
2707                         goto out;
2708
2709 #ifdef CONFIG_CFG80211_WEXT
2710                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2711 #endif
2712         }
2713
2714  out:
2715         wdev_unlock(dev->ieee80211_ptr);
2716
2717         return err;
2718 }
2719
2720 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2721 {
2722         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2723         int err;
2724         struct net_device *dev = info->user_ptr[1];
2725         struct key_parse key;
2726         const u8 *mac_addr = NULL;
2727
2728         err = nl80211_parse_key(info, &key);
2729         if (err)
2730                 return err;
2731
2732         if (!key.p.key)
2733                 return -EINVAL;
2734
2735         if (info->attrs[NL80211_ATTR_MAC])
2736                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2737
2738         if (key.type == -1) {
2739                 if (mac_addr)
2740                         key.type = NL80211_KEYTYPE_PAIRWISE;
2741                 else
2742                         key.type = NL80211_KEYTYPE_GROUP;
2743         }
2744
2745         /* for now */
2746         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2747             key.type != NL80211_KEYTYPE_GROUP)
2748                 return -EINVAL;
2749
2750         if (!rdev->ops->add_key)
2751                 return -EOPNOTSUPP;
2752
2753         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2754                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2755                                            mac_addr))
2756                 return -EINVAL;
2757
2758         wdev_lock(dev->ieee80211_ptr);
2759         err = nl80211_key_allowed(dev->ieee80211_ptr);
2760         if (!err)
2761                 err = rdev_add_key(rdev, dev, key.idx,
2762                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2763                                     mac_addr, &key.p);
2764         wdev_unlock(dev->ieee80211_ptr);
2765
2766         return err;
2767 }
2768
2769 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2770 {
2771         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2772         int err;
2773         struct net_device *dev = info->user_ptr[1];
2774         u8 *mac_addr = NULL;
2775         struct key_parse key;
2776
2777         err = nl80211_parse_key(info, &key);
2778         if (err)
2779                 return err;
2780
2781         if (info->attrs[NL80211_ATTR_MAC])
2782                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2783
2784         if (key.type == -1) {
2785                 if (mac_addr)
2786                         key.type = NL80211_KEYTYPE_PAIRWISE;
2787                 else
2788                         key.type = NL80211_KEYTYPE_GROUP;
2789         }
2790
2791         /* for now */
2792         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2793             key.type != NL80211_KEYTYPE_GROUP)
2794                 return -EINVAL;
2795
2796         if (!rdev->ops->del_key)
2797                 return -EOPNOTSUPP;
2798
2799         wdev_lock(dev->ieee80211_ptr);
2800         err = nl80211_key_allowed(dev->ieee80211_ptr);
2801
2802         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2803             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2804                 err = -ENOENT;
2805
2806         if (!err)
2807                 err = rdev_del_key(rdev, dev, key.idx,
2808                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2809                                    mac_addr);
2810
2811 #ifdef CONFIG_CFG80211_WEXT
2812         if (!err) {
2813                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2814                         dev->ieee80211_ptr->wext.default_key = -1;
2815                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2816                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2817         }
2818 #endif
2819         wdev_unlock(dev->ieee80211_ptr);
2820
2821         return err;
2822 }
2823
2824 /* This function returns an error or the number of nested attributes */
2825 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2826 {
2827         struct nlattr *attr;
2828         int n_entries = 0, tmp;
2829
2830         nla_for_each_nested(attr, nl_attr, tmp) {
2831                 if (nla_len(attr) != ETH_ALEN)
2832                         return -EINVAL;
2833
2834                 n_entries++;
2835         }
2836
2837         return n_entries;
2838 }
2839
2840 /*
2841  * This function parses ACL information and allocates memory for ACL data.
2842  * On successful return, the calling function is responsible to free the
2843  * ACL buffer returned by this function.
2844  */
2845 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2846                                                 struct genl_info *info)
2847 {
2848         enum nl80211_acl_policy acl_policy;
2849         struct nlattr *attr;
2850         struct cfg80211_acl_data *acl;
2851         int i = 0, n_entries, tmp;
2852
2853         if (!wiphy->max_acl_mac_addrs)
2854                 return ERR_PTR(-EOPNOTSUPP);
2855
2856         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2857                 return ERR_PTR(-EINVAL);
2858
2859         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2860         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2861             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2862                 return ERR_PTR(-EINVAL);
2863
2864         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2865                 return ERR_PTR(-EINVAL);
2866
2867         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2868         if (n_entries < 0)
2869                 return ERR_PTR(n_entries);
2870
2871         if (n_entries > wiphy->max_acl_mac_addrs)
2872                 return ERR_PTR(-ENOTSUPP);
2873
2874         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2875                       GFP_KERNEL);
2876         if (!acl)
2877                 return ERR_PTR(-ENOMEM);
2878
2879         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2880                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2881                 i++;
2882         }
2883
2884         acl->n_acl_entries = n_entries;
2885         acl->acl_policy = acl_policy;
2886
2887         return acl;
2888 }
2889
2890 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2891 {
2892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2893         struct net_device *dev = info->user_ptr[1];
2894         struct cfg80211_acl_data *acl;
2895         int err;
2896
2897         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2898             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2899                 return -EOPNOTSUPP;
2900
2901         if (!dev->ieee80211_ptr->beacon_interval)
2902                 return -EINVAL;
2903
2904         acl = parse_acl_data(&rdev->wiphy, info);
2905         if (IS_ERR(acl))
2906                 return PTR_ERR(acl);
2907
2908         err = rdev_set_mac_acl(rdev, dev, acl);
2909
2910         kfree(acl);
2911
2912         return err;
2913 }
2914
2915 static int nl80211_parse_beacon(struct genl_info *info,
2916                                 struct cfg80211_beacon_data *bcn)
2917 {
2918         bool haveinfo = false;
2919
2920         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2921             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2922             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2923             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2924                 return -EINVAL;
2925
2926         memset(bcn, 0, sizeof(*bcn));
2927
2928         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2929                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2930                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2931                 if (!bcn->head_len)
2932                         return -EINVAL;
2933                 haveinfo = true;
2934         }
2935
2936         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2937                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2938                 bcn->tail_len =
2939                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2940                 haveinfo = true;
2941         }
2942
2943         if (!haveinfo)
2944                 return -EINVAL;
2945
2946         if (info->attrs[NL80211_ATTR_IE]) {
2947                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2948                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2949         }
2950
2951         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2952                 bcn->proberesp_ies =
2953                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2954                 bcn->proberesp_ies_len =
2955                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2956         }
2957
2958         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2959                 bcn->assocresp_ies =
2960                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2961                 bcn->assocresp_ies_len =
2962                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2963         }
2964
2965         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2966                 bcn->probe_resp =
2967                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2968                 bcn->probe_resp_len =
2969                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2970         }
2971
2972         return 0;
2973 }
2974
2975 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2976                                    struct cfg80211_ap_settings *params)
2977 {
2978         struct wireless_dev *wdev;
2979         bool ret = false;
2980
2981         mutex_lock(&rdev->devlist_mtx);
2982
2983         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2984                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2985                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2986                         continue;
2987
2988                 if (!wdev->preset_chandef.chan)
2989                         continue;
2990
2991                 params->chandef = wdev->preset_chandef;
2992                 ret = true;
2993                 break;
2994         }
2995
2996         mutex_unlock(&rdev->devlist_mtx);
2997
2998         return ret;
2999 }
3000
3001 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3002                                     enum nl80211_auth_type auth_type,
3003                                     enum nl80211_commands cmd)
3004 {
3005         if (auth_type > NL80211_AUTHTYPE_MAX)
3006                 return false;
3007
3008         switch (cmd) {
3009         case NL80211_CMD_AUTHENTICATE:
3010                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3011                     auth_type == NL80211_AUTHTYPE_SAE)
3012                         return false;
3013                 return true;
3014         case NL80211_CMD_CONNECT:
3015         case NL80211_CMD_START_AP:
3016                 /* SAE not supported yet */
3017                 if (auth_type == NL80211_AUTHTYPE_SAE)
3018                         return false;
3019                 return true;
3020         default:
3021                 return false;
3022         }
3023 }
3024
3025 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3026 {
3027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3028         struct net_device *dev = info->user_ptr[1];
3029         struct wireless_dev *wdev = dev->ieee80211_ptr;
3030         struct cfg80211_ap_settings params;
3031         int err;
3032         u8 radar_detect_width = 0;
3033
3034         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3035             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3036                 return -EOPNOTSUPP;
3037
3038         if (!rdev->ops->start_ap)
3039                 return -EOPNOTSUPP;
3040
3041         if (wdev->beacon_interval)
3042                 return -EALREADY;
3043
3044         memset(&params, 0, sizeof(params));
3045
3046         /* these are required for START_AP */
3047         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3048             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3049             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3050                 return -EINVAL;
3051
3052         err = nl80211_parse_beacon(info, &params.beacon);
3053         if (err)
3054                 return err;
3055
3056         params.beacon_interval =
3057                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3058         params.dtim_period =
3059                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3060
3061         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3062         if (err)
3063                 return err;
3064
3065         /*
3066          * In theory, some of these attributes should be required here
3067          * but since they were not used when the command was originally
3068          * added, keep them optional for old user space programs to let
3069          * them continue to work with drivers that do not need the
3070          * additional information -- drivers must check!
3071          */
3072         if (info->attrs[NL80211_ATTR_SSID]) {
3073                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3074                 params.ssid_len =
3075                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3076                 if (params.ssid_len == 0 ||
3077                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3078                         return -EINVAL;
3079         }
3080
3081         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3082                 params.hidden_ssid = nla_get_u32(
3083                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3084                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3085                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3086                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3087                         return -EINVAL;
3088         }
3089
3090         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3091
3092         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3093                 params.auth_type = nla_get_u32(
3094                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3095                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3096                                              NL80211_CMD_START_AP))
3097                         return -EINVAL;
3098         } else
3099                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3100
3101         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3102                                       NL80211_MAX_NR_CIPHER_SUITES);
3103         if (err)
3104                 return err;
3105
3106         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3107                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3108                         return -EOPNOTSUPP;
3109                 params.inactivity_timeout = nla_get_u16(
3110                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3111         }
3112
3113         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3114                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3115                         return -EINVAL;
3116                 params.p2p_ctwindow =
3117                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3118                 if (params.p2p_ctwindow > 127)
3119                         return -EINVAL;
3120                 if (params.p2p_ctwindow != 0 &&
3121                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3122                         return -EINVAL;
3123         }
3124
3125         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3126                 u8 tmp;
3127
3128                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3129                         return -EINVAL;
3130                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3131                 if (tmp > 1)
3132                         return -EINVAL;
3133                 params.p2p_opp_ps = tmp;
3134                 if (params.p2p_opp_ps != 0 &&
3135                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3136                         return -EINVAL;
3137         }
3138
3139         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3140                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3141                 if (err)
3142                         return err;
3143         } else if (wdev->preset_chandef.chan) {
3144                 params.chandef = wdev->preset_chandef;
3145         } else if (!nl80211_get_ap_channel(rdev, &params))
3146                 return -EINVAL;
3147
3148         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3149                 return -EINVAL;
3150
3151         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3152         if (err < 0)
3153                 return err;
3154         if (err) {
3155                 radar_detect_width = BIT(params.chandef.width);
3156                 params.radar_required = true;
3157         }
3158
3159         mutex_lock(&rdev->devlist_mtx);
3160         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3161                                            params.chandef.chan,
3162                                            CHAN_MODE_SHARED,
3163                                            radar_detect_width);
3164         mutex_unlock(&rdev->devlist_mtx);
3165
3166         if (err)
3167                 return err;
3168
3169         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3170                 params.acl = parse_acl_data(&rdev->wiphy, info);
3171                 if (IS_ERR(params.acl))
3172                         return PTR_ERR(params.acl);
3173         }
3174
3175         err = rdev_start_ap(rdev, dev, &params);
3176         if (!err) {
3177                 wdev->preset_chandef = params.chandef;
3178                 wdev->beacon_interval = params.beacon_interval;
3179                 wdev->channel = params.chandef.chan;
3180                 wdev->ssid_len = params.ssid_len;
3181                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3182         }
3183
3184         kfree(params.acl);
3185
3186         return err;
3187 }
3188
3189 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3190 {
3191         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3192         struct net_device *dev = info->user_ptr[1];
3193         struct wireless_dev *wdev = dev->ieee80211_ptr;
3194         struct cfg80211_beacon_data params;
3195         int err;
3196
3197         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3198             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3199                 return -EOPNOTSUPP;
3200
3201         if (!rdev->ops->change_beacon)
3202                 return -EOPNOTSUPP;
3203
3204         if (!wdev->beacon_interval)
3205                 return -EINVAL;
3206
3207         err = nl80211_parse_beacon(info, &params);
3208         if (err)
3209                 return err;
3210
3211         return rdev_change_beacon(rdev, dev, &params);
3212 }
3213
3214 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3215 {
3216         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3217         struct net_device *dev = info->user_ptr[1];
3218
3219         return cfg80211_stop_ap(rdev, dev);
3220 }
3221
3222 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3223         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3224         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3225         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3226         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3227         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3228         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3229 };
3230
3231 static int parse_station_flags(struct genl_info *info,
3232                                enum nl80211_iftype iftype,
3233                                struct station_parameters *params)
3234 {
3235         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3236         struct nlattr *nla;
3237         int flag;
3238
3239         /*
3240          * Try parsing the new attribute first so userspace
3241          * can specify both for older kernels.
3242          */
3243         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3244         if (nla) {
3245                 struct nl80211_sta_flag_update *sta_flags;
3246
3247                 sta_flags = nla_data(nla);
3248                 params->sta_flags_mask = sta_flags->mask;
3249                 params->sta_flags_set = sta_flags->set;
3250                 params->sta_flags_set &= params->sta_flags_mask;
3251                 if ((params->sta_flags_mask |
3252                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3253                         return -EINVAL;
3254                 return 0;
3255         }
3256
3257         /* if present, parse the old attribute */
3258
3259         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3260         if (!nla)
3261                 return 0;
3262
3263         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3264                              nla, sta_flags_policy))
3265                 return -EINVAL;
3266
3267         /*
3268          * Only allow certain flags for interface types so that
3269          * other attributes are silently ignored. Remember that
3270          * this is backward compatibility code with old userspace
3271          * and shouldn't be hit in other cases anyway.
3272          */
3273         switch (iftype) {
3274         case NL80211_IFTYPE_AP:
3275         case NL80211_IFTYPE_AP_VLAN:
3276         case NL80211_IFTYPE_P2P_GO:
3277                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3278                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3279                                          BIT(NL80211_STA_FLAG_WME) |
3280                                          BIT(NL80211_STA_FLAG_MFP);
3281                 break;
3282         case NL80211_IFTYPE_P2P_CLIENT:
3283         case NL80211_IFTYPE_STATION:
3284                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3285                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3286                 break;
3287         case NL80211_IFTYPE_MESH_POINT:
3288                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3289                                          BIT(NL80211_STA_FLAG_MFP) |
3290                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3291         default:
3292                 return -EINVAL;
3293         }
3294
3295         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3296                 if (flags[flag]) {
3297                         params->sta_flags_set |= (1<<flag);
3298
3299                         /* no longer support new API additions in old API */
3300                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3301                                 return -EINVAL;
3302                 }
3303         }
3304
3305         return 0;
3306 }
3307
3308 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3309                                  int attr)
3310 {
3311         struct nlattr *rate;
3312         u32 bitrate;
3313         u16 bitrate_compat;
3314
3315         rate = nla_nest_start(msg, attr);
3316         if (!rate)
3317                 return false;
3318
3319         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3320         bitrate = cfg80211_calculate_bitrate(info);
3321         /* report 16-bit bitrate only if we can */
3322         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3323         if (bitrate > 0 &&
3324             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3325                 return false;
3326         if (bitrate_compat > 0 &&
3327             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3328                 return false;
3329
3330         if (info->flags & RATE_INFO_FLAGS_MCS) {
3331                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3332                         return false;
3333                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3334                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3335                         return false;
3336                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3337                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3338                         return false;
3339         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3340                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3341                         return false;
3342                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3343                         return false;
3344                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3345                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3346                         return false;
3347                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3348                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3349                         return false;
3350                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3351                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3352                         return false;
3353                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3354                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3355                         return false;
3356                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3357                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3358                         return false;
3359         }
3360
3361         nla_nest_end(msg, rate);
3362         return true;
3363 }
3364
3365 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3366                                 int flags,
3367                                 struct cfg80211_registered_device *rdev,
3368                                 struct net_device *dev,
3369                                 const u8 *mac_addr, struct station_info *sinfo)
3370 {
3371         void *hdr;
3372         struct nlattr *sinfoattr, *bss_param;
3373
3374         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3375         if (!hdr)
3376                 return -1;
3377
3378         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3379             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3380             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3381                 goto nla_put_failure;
3382
3383         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3384         if (!sinfoattr)
3385                 goto nla_put_failure;
3386         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3387             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3388                         sinfo->connected_time))
3389                 goto nla_put_failure;
3390         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3391             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3392                         sinfo->inactive_time))
3393                 goto nla_put_failure;
3394         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3395                               STATION_INFO_RX_BYTES64)) &&
3396             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3397                         (u32)sinfo->rx_bytes))
3398                 goto nla_put_failure;
3399         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3400                               NL80211_STA_INFO_TX_BYTES64)) &&
3401             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3402                         (u32)sinfo->tx_bytes))
3403                 goto nla_put_failure;
3404         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3405             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3406                         sinfo->rx_bytes))
3407                 goto nla_put_failure;
3408         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3409             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3410                         sinfo->tx_bytes))
3411                 goto nla_put_failure;
3412         if ((sinfo->filled & STATION_INFO_LLID) &&
3413             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3414                 goto nla_put_failure;
3415         if ((sinfo->filled & STATION_INFO_PLID) &&
3416             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3417                 goto nla_put_failure;
3418         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3419             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3420                        sinfo->plink_state))
3421                 goto nla_put_failure;
3422         switch (rdev->wiphy.signal_type) {
3423         case CFG80211_SIGNAL_TYPE_MBM:
3424                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3425                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3426                                sinfo->signal))
3427                         goto nla_put_failure;
3428                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3429                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3430                                sinfo->signal_avg))
3431                         goto nla_put_failure;
3432                 break;
3433         default:
3434                 break;
3435         }
3436         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3437                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3438                                           NL80211_STA_INFO_TX_BITRATE))
3439                         goto nla_put_failure;
3440         }
3441         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3442                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3443                                           NL80211_STA_INFO_RX_BITRATE))
3444                         goto nla_put_failure;
3445         }
3446         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3447             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3448                         sinfo->rx_packets))
3449                 goto nla_put_failure;
3450         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3451             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3452                         sinfo->tx_packets))
3453                 goto nla_put_failure;
3454         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3455             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3456                         sinfo->tx_retries))
3457                 goto nla_put_failure;
3458         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3459             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3460                         sinfo->tx_failed))
3461                 goto nla_put_failure;
3462         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3463             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3464                         sinfo->beacon_loss_count))
3465                 goto nla_put_failure;
3466         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3467             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3468                         sinfo->local_pm))
3469                 goto nla_put_failure;
3470         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3471             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3472                         sinfo->peer_pm))
3473                 goto nla_put_failure;
3474         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3475             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3476                         sinfo->nonpeer_pm))
3477                 goto nla_put_failure;
3478         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3479                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3480                 if (!bss_param)
3481                         goto nla_put_failure;
3482
3483                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3484                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3485                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3486                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3487                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3488                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3489                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3490                                sinfo->bss_param.dtim_period) ||
3491                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3492                                 sinfo->bss_param.beacon_interval))
3493                         goto nla_put_failure;
3494
3495                 nla_nest_end(msg, bss_param);
3496         }
3497         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3498             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3499                     sizeof(struct nl80211_sta_flag_update),
3500                     &sinfo->sta_flags))
3501                 goto nla_put_failure;
3502         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3503                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3504                             sinfo->t_offset))
3505                 goto nla_put_failure;
3506         nla_nest_end(msg, sinfoattr);
3507
3508         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3509             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3510                     sinfo->assoc_req_ies))
3511                 goto nla_put_failure;
3512
3513         return genlmsg_end(msg, hdr);
3514
3515  nla_put_failure:
3516         genlmsg_cancel(msg, hdr);
3517         return -EMSGSIZE;
3518 }
3519
3520 static int nl80211_dump_station(struct sk_buff *skb,
3521                                 struct netlink_callback *cb)
3522 {
3523         struct station_info sinfo;
3524         struct cfg80211_registered_device *dev;
3525         struct net_device *netdev;
3526         u8 mac_addr[ETH_ALEN];
3527         int sta_idx = cb->args[1];
3528         int err;
3529
3530         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3531         if (err)
3532                 return err;
3533
3534         if (!dev->ops->dump_station) {
3535                 err = -EOPNOTSUPP;
3536                 goto out_err;
3537         }
3538
3539         while (1) {
3540                 memset(&sinfo, 0, sizeof(sinfo));
3541                 err = rdev_dump_station(dev, netdev, sta_idx,
3542                                         mac_addr, &sinfo);
3543                 if (err == -ENOENT)
3544                         break;
3545                 if (err)
3546                         goto out_err;
3547
3548                 if (nl80211_send_station(skb,
3549                                 NETLINK_CB(cb->skb).portid,
3550                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3551                                 dev, netdev, mac_addr,
3552                                 &sinfo) < 0)
3553                         goto out;
3554
3555                 sta_idx++;
3556         }
3557
3558
3559  out:
3560         cb->args[1] = sta_idx;
3561         err = skb->len;
3562  out_err:
3563         nl80211_finish_netdev_dump(dev);
3564
3565         return err;
3566 }
3567
3568 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3569 {
3570         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3571         struct net_device *dev = info->user_ptr[1];
3572         struct station_info sinfo;
3573         struct sk_buff *msg;
3574         u8 *mac_addr = NULL;
3575         int err;
3576
3577         memset(&sinfo, 0, sizeof(sinfo));
3578
3579         if (!info->attrs[NL80211_ATTR_MAC])
3580                 return -EINVAL;
3581
3582         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3583
3584         if (!rdev->ops->get_station)
3585                 return -EOPNOTSUPP;
3586
3587         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3588         if (err)
3589                 return err;
3590
3591         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3592         if (!msg)
3593                 return -ENOMEM;
3594
3595         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3596                                  rdev, dev, mac_addr, &sinfo) < 0) {
3597                 nlmsg_free(msg);
3598                 return -ENOBUFS;
3599         }
3600
3601         return genlmsg_reply(msg, info);
3602 }
3603
3604 int cfg80211_check_station_change(struct wiphy *wiphy,
3605                                   struct station_parameters *params,
3606                                   enum cfg80211_station_type statype)
3607 {
3608         if (params->listen_interval != -1)
3609                 return -EINVAL;
3610         if (params->aid)
3611                 return -EINVAL;
3612
3613         /* When you run into this, adjust the code below for the new flag */
3614         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3615
3616         switch (statype) {
3617         case CFG80211_STA_MESH_PEER_NONSEC:
3618         case CFG80211_STA_MESH_PEER_SECURE:
3619                 /*
3620                  * No ignoring the TDLS flag here -- the userspace mesh
3621                  * code doesn't have the bug of including TDLS in the
3622                  * mask everywhere.
3623                  */
3624                 if (params->sta_flags_mask &
3625                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3626                                   BIT(NL80211_STA_FLAG_MFP) |
3627                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3628                         return -EINVAL;
3629                 break;
3630         case CFG80211_STA_TDLS_PEER_SETUP:
3631         case CFG80211_STA_TDLS_PEER_ACTIVE:
3632                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3633                         return -EINVAL;
3634                 /* ignore since it can't change */
3635                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3636                 break;
3637         default:
3638                 /* disallow mesh-specific things */
3639                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3640                         return -EINVAL;
3641                 if (params->local_pm)
3642                         return -EINVAL;
3643                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3644                         return -EINVAL;
3645         }
3646
3647         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3648             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3649                 /* TDLS can't be set, ... */
3650                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3651                         return -EINVAL;
3652                 /*
3653                  * ... but don't bother the driver with it. This works around
3654                  * a hostapd/wpa_supplicant issue -- it always includes the
3655                  * TLDS_PEER flag in the mask even for AP mode.
3656                  */
3657                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3658         }
3659
3660         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3661                 /* reject other things that can't change */
3662                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3663                         return -EINVAL;
3664                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3665                         return -EINVAL;
3666                 if (params->supported_rates)
3667                         return -EINVAL;
3668                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3669                         return -EINVAL;
3670         }
3671
3672         if (statype != CFG80211_STA_AP_CLIENT) {
3673                 if (params->vlan)
3674                         return -EINVAL;
3675         }
3676
3677         switch (statype) {
3678         case CFG80211_STA_AP_MLME_CLIENT:
3679                 /* Use this only for authorizing/unauthorizing a station */
3680                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3681                         return -EOPNOTSUPP;
3682                 break;
3683         case CFG80211_STA_AP_CLIENT:
3684                 /* accept only the listed bits */
3685                 if (params->sta_flags_mask &
3686                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3687                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3688                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3689                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3690                                   BIT(NL80211_STA_FLAG_WME) |
3691                                   BIT(NL80211_STA_FLAG_MFP)))
3692                         return -EINVAL;
3693
3694                 /* but authenticated/associated only if driver handles it */
3695                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3696                     params->sta_flags_mask &
3697                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3698                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3699                         return -EINVAL;
3700                 break;
3701         case CFG80211_STA_IBSS:
3702         case CFG80211_STA_AP_STA:
3703                 /* reject any changes other than AUTHORIZED */
3704                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3705                         return -EINVAL;
3706                 break;
3707         case CFG80211_STA_TDLS_PEER_SETUP:
3708                 /* reject any changes other than AUTHORIZED or WME */
3709                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3710                                                BIT(NL80211_STA_FLAG_WME)))
3711                         return -EINVAL;
3712                 /* force (at least) rates when authorizing */
3713                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3714                     !params->supported_rates)
3715                         return -EINVAL;
3716                 break;
3717         case CFG80211_STA_TDLS_PEER_ACTIVE:
3718                 /* reject any changes */
3719                 return -EINVAL;
3720         case CFG80211_STA_MESH_PEER_NONSEC:
3721                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3722                         return -EINVAL;
3723                 break;
3724         case CFG80211_STA_MESH_PEER_SECURE:
3725                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3726                         return -EINVAL;
3727                 break;
3728         }
3729
3730         return 0;
3731 }
3732 EXPORT_SYMBOL(cfg80211_check_station_change);
3733
3734 /*
3735  * Get vlan interface making sure it is running and on the right wiphy.
3736  */
3737 static struct net_device *get_vlan(struct genl_info *info,
3738                                    struct cfg80211_registered_device *rdev)
3739 {
3740         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3741         struct net_device *v;
3742         int ret;
3743
3744         if (!vlanattr)
3745                 return NULL;
3746
3747         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3748         if (!v)
3749                 return ERR_PTR(-ENODEV);
3750
3751         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3752                 ret = -EINVAL;
3753                 goto error;
3754         }
3755
3756         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3757             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3758             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3759                 ret = -EINVAL;
3760                 goto error;
3761         }
3762
3763         if (!netif_running(v)) {
3764                 ret = -ENETDOWN;
3765                 goto error;
3766         }
3767
3768         return v;
3769  error:
3770         dev_put(v);
3771         return ERR_PTR(ret);
3772 }
3773
3774 static struct nla_policy
3775 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3776         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3777         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3778 };
3779
3780 static int nl80211_parse_sta_wme(struct genl_info *info,
3781                                  struct station_parameters *params)
3782 {
3783         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3784         struct nlattr *nla;
3785         int err;
3786
3787         /* parse WME attributes if present */
3788         if (!info->attrs[NL80211_ATTR_STA_WME])
3789                 return 0;
3790
3791         nla = info->attrs[NL80211_ATTR_STA_WME];
3792         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3793                                nl80211_sta_wme_policy);
3794         if (err)
3795                 return err;
3796
3797         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3798                 params->uapsd_queues = nla_get_u8(
3799                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3800         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3801                 return -EINVAL;
3802
3803         if (tb[NL80211_STA_WME_MAX_SP])
3804                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3805
3806         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3807                 return -EINVAL;
3808
3809         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3810
3811         return 0;
3812 }
3813
3814 static int nl80211_set_station_tdls(struct genl_info *info,
3815                                     struct station_parameters *params)
3816 {
3817         /* Dummy STA entry gets updated once the peer capabilities are known */
3818         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3819                 params->ht_capa =
3820                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3821         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3822                 params->vht_capa =
3823                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3824
3825         return nl80211_parse_sta_wme(info, params);
3826 }
3827
3828 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3829 {
3830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3831         struct net_device *dev = info->user_ptr[1];
3832         struct station_parameters params;
3833         u8 *mac_addr;
3834         int err;
3835
3836         memset(&params, 0, sizeof(params));
3837
3838         params.listen_interval = -1;
3839
3840         if (!rdev->ops->change_station)
3841                 return -EOPNOTSUPP;
3842
3843         if (info->attrs[NL80211_ATTR_STA_AID])
3844                 return -EINVAL;
3845
3846         if (!info->attrs[NL80211_ATTR_MAC])
3847                 return -EINVAL;
3848
3849         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3850
3851         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3852                 params.supported_rates =
3853                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3854                 params.supported_rates_len =
3855                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3856         }
3857
3858         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3859                 params.capability =
3860                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3861                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3862         }
3863
3864         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3865                 params.ext_capab =
3866                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3867                 params.ext_capab_len =
3868                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3869         }
3870
3871         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3872                 return -EINVAL;
3873
3874         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3875                 return -EINVAL;
3876
3877         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3878                 params.plink_action =
3879                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3880                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3881                         return -EINVAL;
3882         }
3883
3884         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3885                 params.plink_state =
3886                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3887                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3888                         return -EINVAL;
3889                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3890         }
3891
3892         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3893                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3894                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3895
3896                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3897                     pm > NL80211_MESH_POWER_MAX)
3898                         return -EINVAL;
3899
3900                 params.local_pm = pm;
3901         }
3902
3903         /* Include parameters for TDLS peer (will check later) */
3904         err = nl80211_set_station_tdls(info, &params);
3905         if (err)
3906                 return err;
3907
3908         params.vlan = get_vlan(info, rdev);
3909         if (IS_ERR(params.vlan))
3910                 return PTR_ERR(params.vlan);
3911
3912         switch (dev->ieee80211_ptr->iftype) {
3913         case NL80211_IFTYPE_AP:
3914         case NL80211_IFTYPE_AP_VLAN:
3915         case NL80211_IFTYPE_P2P_GO:
3916         case NL80211_IFTYPE_P2P_CLIENT:
3917         case NL80211_IFTYPE_STATION:
3918         case NL80211_IFTYPE_ADHOC:
3919         case NL80211_IFTYPE_MESH_POINT:
3920                 break;
3921         default:
3922                 err = -EOPNOTSUPP;
3923                 goto out_put_vlan;
3924         }
3925
3926         /* driver will call cfg80211_check_station_change() */
3927         err = rdev_change_station(rdev, dev, mac_addr, &params);
3928
3929  out_put_vlan:
3930         if (params.vlan)
3931                 dev_put(params.vlan);
3932
3933         return err;
3934 }
3935
3936 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3937 {
3938         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3939         int err;
3940         struct net_device *dev = info->user_ptr[1];
3941         struct station_parameters params;
3942         u8 *mac_addr = NULL;
3943
3944         memset(&params, 0, sizeof(params));
3945
3946         if (!rdev->ops->add_station)
3947                 return -EOPNOTSUPP;
3948
3949         if (!info->attrs[NL80211_ATTR_MAC])
3950                 return -EINVAL;
3951
3952         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3953                 return -EINVAL;
3954
3955         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3956                 return -EINVAL;
3957
3958         if (!info->attrs[NL80211_ATTR_STA_AID])
3959                 return -EINVAL;
3960
3961         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3962         params.supported_rates =
3963                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3964         params.supported_rates_len =
3965                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3966         params.listen_interval =
3967                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3968
3969         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3970         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3971                 return -EINVAL;
3972
3973         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3974                 params.capability =
3975                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3976                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3977         }
3978
3979         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3980                 params.ext_capab =
3981                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3982                 params.ext_capab_len =
3983                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3984         }
3985
3986         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3987                 params.ht_capa =
3988                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3989
3990         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3991                 params.vht_capa =
3992                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3993
3994         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3995                 params.plink_action =
3996                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3997                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3998                         return -EINVAL;
3999         }
4000
4001         err = nl80211_parse_sta_wme(info, &params);
4002         if (err)
4003                 return err;
4004
4005         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4006                 return -EINVAL;
4007
4008         /* When you run into this, adjust the code below for the new flag */
4009         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4010
4011         switch (dev->ieee80211_ptr->iftype) {
4012         case NL80211_IFTYPE_AP:
4013         case NL80211_IFTYPE_AP_VLAN:
4014         case NL80211_IFTYPE_P2P_GO:
4015                 /* ignore WME attributes if iface/sta is not capable */
4016                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4017                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4018                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4019
4020                 /* TDLS peers cannot be added */
4021                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4022                         return -EINVAL;
4023                 /* but don't bother the driver with it */
4024                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4025
4026                 /* allow authenticated/associated only if driver handles it */
4027                 if (!(rdev->wiphy.features &
4028                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4029                     params.sta_flags_mask &
4030                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4031                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4032                         return -EINVAL;
4033
4034                 /* must be last in here for error handling */
4035                 params.vlan = get_vlan(info, rdev);
4036                 if (IS_ERR(params.vlan))
4037                         return PTR_ERR(params.vlan);
4038                 break;
4039         case NL80211_IFTYPE_MESH_POINT:
4040                 /* ignore uAPSD data */
4041                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4042
4043                 /* associated is disallowed */
4044                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4045                         return -EINVAL;
4046                 /* TDLS peers cannot be added */
4047                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4048                         return -EINVAL;
4049                 break;
4050         case NL80211_IFTYPE_STATION:
4051                 /* ignore uAPSD data */
4052                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4053
4054                 /* these are disallowed */
4055                 if (params.sta_flags_mask &
4056                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4057                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4058                         return -EINVAL;
4059                 /* Only TDLS peers can be added */
4060                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4061                         return -EINVAL;
4062                 /* Can only add if TDLS ... */
4063                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4064                         return -EOPNOTSUPP;
4065                 /* ... with external setup is supported */
4066                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4067                         return -EOPNOTSUPP;
4068                 /*
4069                  * Older wpa_supplicant versions always mark the TDLS peer
4070                  * as authorized, but it shouldn't yet be.
4071                  */
4072                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4073                 break;
4074         default:
4075                 return -EOPNOTSUPP;
4076         }
4077
4078         /* be aware of params.vlan when changing code here */
4079
4080         err = rdev_add_station(rdev, dev, mac_addr, &params);
4081
4082         if (params.vlan)
4083                 dev_put(params.vlan);
4084         return err;
4085 }
4086
4087 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4088 {
4089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4090         struct net_device *dev = info->user_ptr[1];
4091         u8 *mac_addr = NULL;
4092
4093         if (info->attrs[NL80211_ATTR_MAC])
4094                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4095
4096         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4097             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4098             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4099             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4100                 return -EINVAL;
4101
4102         if (!rdev->ops->del_station)
4103                 return -EOPNOTSUPP;
4104
4105         return rdev_del_station(rdev, dev, mac_addr);
4106 }
4107
4108 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4109                                 int flags, struct net_device *dev,
4110                                 u8 *dst, u8 *next_hop,
4111                                 struct mpath_info *pinfo)
4112 {
4113         void *hdr;
4114         struct nlattr *pinfoattr;
4115
4116         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4117         if (!hdr)
4118                 return -1;
4119
4120         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4121             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4122             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4123             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4124                 goto nla_put_failure;
4125
4126         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4127         if (!pinfoattr)
4128                 goto nla_put_failure;
4129         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4130             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4131                         pinfo->frame_qlen))
4132                 goto nla_put_failure;
4133         if (((pinfo->filled & MPATH_INFO_SN) &&
4134              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4135             ((pinfo->filled & MPATH_INFO_METRIC) &&
4136              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4137                          pinfo->metric)) ||
4138             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4139              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4140                          pinfo->exptime)) ||
4141             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4142              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4143                         pinfo->flags)) ||
4144             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4145              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4146                          pinfo->discovery_timeout)) ||
4147             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4148              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4149                         pinfo->discovery_retries)))
4150                 goto nla_put_failure;
4151
4152         nla_nest_end(msg, pinfoattr);
4153
4154         return genlmsg_end(msg, hdr);
4155
4156  nla_put_failure:
4157         genlmsg_cancel(msg, hdr);
4158         return -EMSGSIZE;
4159 }
4160
4161 static int nl80211_dump_mpath(struct sk_buff *skb,
4162                               struct netlink_callback *cb)
4163 {
4164         struct mpath_info pinfo;
4165         struct cfg80211_registered_device *dev;
4166         struct net_device *netdev;
4167         u8 dst[ETH_ALEN];
4168         u8 next_hop[ETH_ALEN];
4169         int path_idx = cb->args[1];
4170         int err;
4171
4172         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4173         if (err)
4174                 return err;
4175
4176         if (!dev->ops->dump_mpath) {
4177                 err = -EOPNOTSUPP;
4178                 goto out_err;
4179         }
4180
4181         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
4182                 err = -EOPNOTSUPP;
4183                 goto out_err;
4184         }
4185
4186         while (1) {
4187                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
4188                                       &pinfo);
4189                 if (err == -ENOENT)
4190                         break;
4191                 if (err)
4192                         goto out_err;
4193
4194                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4195                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4196                                        netdev, dst, next_hop,
4197                                        &pinfo) < 0)
4198                         goto out;
4199
4200                 path_idx++;
4201         }
4202
4203
4204  out:
4205         cb->args[1] = path_idx;
4206         err = skb->len;
4207  out_err:
4208         nl80211_finish_netdev_dump(dev);
4209         return err;
4210 }
4211
4212 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4213 {
4214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4215         int err;
4216         struct net_device *dev = info->user_ptr[1];
4217         struct mpath_info pinfo;
4218         struct sk_buff *msg;
4219         u8 *dst = NULL;
4220         u8 next_hop[ETH_ALEN];
4221
4222         memset(&pinfo, 0, sizeof(pinfo));
4223
4224         if (!info->attrs[NL80211_ATTR_MAC])
4225                 return -EINVAL;
4226
4227         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4228
4229         if (!rdev->ops->get_mpath)
4230                 return -EOPNOTSUPP;
4231
4232         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4233                 return -EOPNOTSUPP;
4234
4235         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4236         if (err)
4237                 return err;
4238
4239         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4240         if (!msg)
4241                 return -ENOMEM;
4242
4243         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4244                                  dev, dst, next_hop, &pinfo) < 0) {
4245                 nlmsg_free(msg);
4246                 return -ENOBUFS;
4247         }
4248
4249         return genlmsg_reply(msg, info);
4250 }
4251
4252 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4253 {
4254         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4255         struct net_device *dev = info->user_ptr[1];
4256         u8 *dst = NULL;
4257         u8 *next_hop = NULL;
4258
4259         if (!info->attrs[NL80211_ATTR_MAC])
4260                 return -EINVAL;
4261
4262         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4263                 return -EINVAL;
4264
4265         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4266         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4267
4268         if (!rdev->ops->change_mpath)
4269                 return -EOPNOTSUPP;
4270
4271         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4272                 return -EOPNOTSUPP;
4273
4274         return rdev_change_mpath(rdev, dev, dst, next_hop);
4275 }
4276
4277 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4278 {
4279         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4280         struct net_device *dev = info->user_ptr[1];
4281         u8 *dst = NULL;
4282         u8 *next_hop = NULL;
4283
4284         if (!info->attrs[NL80211_ATTR_MAC])
4285                 return -EINVAL;
4286
4287         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4288                 return -EINVAL;
4289
4290         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4291         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4292
4293         if (!rdev->ops->add_mpath)
4294                 return -EOPNOTSUPP;
4295
4296         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4297                 return -EOPNOTSUPP;
4298
4299         return rdev_add_mpath(rdev, dev, dst, next_hop);
4300 }
4301
4302 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4303 {
4304         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4305         struct net_device *dev = info->user_ptr[1];
4306         u8 *dst = NULL;
4307
4308         if (info->attrs[NL80211_ATTR_MAC])
4309                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4310
4311         if (!rdev->ops->del_mpath)
4312                 return -EOPNOTSUPP;
4313
4314         return rdev_del_mpath(rdev, dev, dst);
4315 }
4316
4317 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4318 {
4319         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4320         struct net_device *dev = info->user_ptr[1];
4321         struct bss_parameters params;
4322
4323         memset(&params, 0, sizeof(params));
4324         /* default to not changing parameters */
4325         params.use_cts_prot = -1;
4326         params.use_short_preamble = -1;
4327         params.use_short_slot_time = -1;
4328         params.ap_isolate = -1;
4329         params.ht_opmode = -1;
4330         params.p2p_ctwindow = -1;
4331         params.p2p_opp_ps = -1;
4332
4333         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4334                 params.use_cts_prot =
4335                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4336         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4337                 params.use_short_preamble =
4338                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4339         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4340                 params.use_short_slot_time =
4341                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4342         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4343                 params.basic_rates =
4344                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4345                 params.basic_rates_len =
4346                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4347         }
4348         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4349                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4350         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4351                 params.ht_opmode =
4352                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4353
4354         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4355                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4356                         return -EINVAL;
4357                 params.p2p_ctwindow =
4358                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4359                 if (params.p2p_ctwindow < 0)
4360                         return -EINVAL;
4361                 if (params.p2p_ctwindow != 0 &&
4362                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4363                         return -EINVAL;
4364         }
4365
4366         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4367                 u8 tmp;
4368
4369                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4370                         return -EINVAL;
4371                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4372                 if (tmp > 1)
4373                         return -EINVAL;
4374                 params.p2p_opp_ps = tmp;
4375                 if (params.p2p_opp_ps &&
4376                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4377                         return -EINVAL;
4378         }
4379
4380         if (!rdev->ops->change_bss)
4381                 return -EOPNOTSUPP;
4382
4383         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4384             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4385                 return -EOPNOTSUPP;
4386
4387         return rdev_change_bss(rdev, dev, &params);
4388 }
4389
4390 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4391         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4392         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4393         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4394         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4395         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4396         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4397 };
4398
4399 static int parse_reg_rule(struct nlattr *tb[],
4400         struct ieee80211_reg_rule *reg_rule)
4401 {
4402         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4403         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4404
4405         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4406                 return -EINVAL;
4407         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4408                 return -EINVAL;
4409         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4410                 return -EINVAL;
4411         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4412                 return -EINVAL;
4413         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4414                 return -EINVAL;
4415
4416         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4417
4418         freq_range->start_freq_khz =
4419                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4420         freq_range->end_freq_khz =
4421                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4422         freq_range->max_bandwidth_khz =
4423                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4424
4425         power_rule->max_eirp =
4426                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4427
4428         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4429                 power_rule->max_antenna_gain =
4430                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4431
4432         return 0;
4433 }
4434
4435 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4436 {
4437         int r;
4438         char *data = NULL;
4439         enum nl80211_user_reg_hint_type user_reg_hint_type;
4440
4441         /*
4442          * You should only get this when cfg80211 hasn't yet initialized
4443          * completely when built-in to the kernel right between the time
4444          * window between nl80211_init() and regulatory_init(), if that is
4445          * even possible.
4446          */
4447         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4448                 return -EINPROGRESS;
4449
4450         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4451                 return -EINVAL;
4452
4453         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4454
4455         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4456                 user_reg_hint_type =
4457                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4458         else
4459                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4460
4461         switch (user_reg_hint_type) {
4462         case NL80211_USER_REG_HINT_USER:
4463         case NL80211_USER_REG_HINT_CELL_BASE:
4464                 break;
4465         default:
4466                 return -EINVAL;
4467         }
4468
4469         r = regulatory_hint_user(data, user_reg_hint_type);
4470
4471         return r;
4472 }
4473
4474 static int nl80211_get_mesh_config(struct sk_buff *skb,
4475                                    struct genl_info *info)
4476 {
4477         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4478         struct net_device *dev = info->user_ptr[1];
4479         struct wireless_dev *wdev = dev->ieee80211_ptr;
4480         struct mesh_config cur_params;
4481         int err = 0;
4482         void *hdr;
4483         struct nlattr *pinfoattr;
4484         struct sk_buff *msg;
4485
4486         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4487                 return -EOPNOTSUPP;
4488
4489         if (!rdev->ops->get_mesh_config)
4490                 return -EOPNOTSUPP;
4491
4492         wdev_lock(wdev);
4493         /* If not connected, get default parameters */
4494         if (!wdev->mesh_id_len)
4495                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4496         else
4497                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4498         wdev_unlock(wdev);
4499
4500         if (err)
4501                 return err;
4502
4503         /* Draw up a netlink message to send back */
4504         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4505         if (!msg)
4506                 return -ENOMEM;
4507         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4508                              NL80211_CMD_GET_MESH_CONFIG);
4509         if (!hdr)
4510                 goto out;
4511         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4512         if (!pinfoattr)
4513                 goto nla_put_failure;
4514         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4515             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4516                         cur_params.dot11MeshRetryTimeout) ||
4517             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4518                         cur_params.dot11MeshConfirmTimeout) ||
4519             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4520                         cur_params.dot11MeshHoldingTimeout) ||
4521             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4522                         cur_params.dot11MeshMaxPeerLinks) ||
4523             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4524                        cur_params.dot11MeshMaxRetries) ||
4525             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4526                        cur_params.dot11MeshTTL) ||
4527             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4528                        cur_params.element_ttl) ||
4529             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4530                        cur_params.auto_open_plinks) ||
4531             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4532                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4533             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4534                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4535             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4536                         cur_params.path_refresh_time) ||
4537             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4538                         cur_params.min_discovery_timeout) ||
4539             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4540                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4541             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4542                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4543             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4544                         cur_params.dot11MeshHWMPperrMinInterval) ||
4545             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4546                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4547             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4548                        cur_params.dot11MeshHWMPRootMode) ||
4549             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4550                         cur_params.dot11MeshHWMPRannInterval) ||
4551             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4552                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4553             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4554                        cur_params.dot11MeshForwarding) ||
4555             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4556                         cur_params.rssi_threshold) ||
4557             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4558                         cur_params.ht_opmode) ||
4559             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4560                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4561             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4562                         cur_params.dot11MeshHWMProotInterval) ||
4563             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4564                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4565             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4566                         cur_params.power_mode) ||
4567             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4568                         cur_params.dot11MeshAwakeWindowDuration))
4569                 goto nla_put_failure;
4570         nla_nest_end(msg, pinfoattr);
4571         genlmsg_end(msg, hdr);
4572         return genlmsg_reply(msg, info);
4573
4574  nla_put_failure:
4575         genlmsg_cancel(msg, hdr);
4576  out:
4577         nlmsg_free(msg);
4578         return -ENOBUFS;
4579 }
4580
4581 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4582         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4583         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4584         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4585         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4586         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4587         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4588         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4589         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4590         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4591         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4592         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4593         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4594         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4595         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4596         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4597         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4598         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4599         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4600         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4601         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4602         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4603         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4604         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4605         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4606         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4607         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4608         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4609 };
4610
4611 static const struct nla_policy
4612         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4613         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4614         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4615         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4616         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4617         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4618                                     .len = IEEE80211_MAX_DATA_LEN },
4619         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4620 };
4621
4622 static int nl80211_parse_mesh_config(struct genl_info *info,
4623                                      struct mesh_config *cfg,
4624                                      u32 *mask_out)
4625 {
4626         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4627         u32 mask = 0;
4628
4629 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4630 do {                                                                        \
4631         if (tb[attr]) {                                                     \
4632                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4633                         return -EINVAL;                                     \
4634                 cfg->param = fn(tb[attr]);                                  \
4635                 mask |= (1 << (attr - 1));                                  \
4636         }                                                                   \
4637 } while (0)
4638
4639
4640         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4641                 return -EINVAL;
4642         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4643                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4644                              nl80211_meshconf_params_policy))
4645                 return -EINVAL;
4646
4647         /* This makes sure that there aren't more than 32 mesh config
4648          * parameters (otherwise our bitfield scheme would not work.) */
4649         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4650
4651         /* Fill in the params struct */
4652         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4653                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4654                                   nla_get_u16);
4655         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4656                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4657                                   nla_get_u16);
4658         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4659                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4660                                   nla_get_u16);
4661         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4662                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4663                                   nla_get_u16);
4664         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4665                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4666                                   nla_get_u8);
4667         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4668                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4669         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4670                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4671                                   nla_get_u8);
4672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4673                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4674                                   nla_get_u8);
4675         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4676                                   1, 255, mask,
4677                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4678                                   nla_get_u32);
4679         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4680                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4681                                   nla_get_u8);
4682         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4683                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4684                                   nla_get_u32);
4685         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4686                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4687                                   nla_get_u16);
4688         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4689                                   1, 65535, mask,
4690                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4691                                   nla_get_u32);
4692         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4693                                   1, 65535, mask,
4694                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4695                                   nla_get_u16);
4696         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4697                                   1, 65535, mask,
4698                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4699                                   nla_get_u16);
4700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4701                                   dot11MeshHWMPnetDiameterTraversalTime,
4702                                   1, 65535, mask,
4703                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4704                                   nla_get_u16);
4705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4706                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4707                                   nla_get_u8);
4708         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4709                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4710                                   nla_get_u16);
4711         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4712                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4713                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4714                                   nla_get_u8);
4715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4716                                   mask, NL80211_MESHCONF_FORWARDING,
4717                                   nla_get_u8);
4718         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4719                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4720                                   nla_get_u32);
4721         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4722                                   mask, NL80211_MESHCONF_HT_OPMODE,
4723                                   nla_get_u16);
4724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4725                                   1, 65535, mask,
4726                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4727                                   nla_get_u32);
4728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4729                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4730                                   nla_get_u16);
4731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4732                                   dot11MeshHWMPconfirmationInterval,
4733                                   1, 65535, mask,
4734                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4735                                   nla_get_u16);
4736         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4737                                   NL80211_MESH_POWER_ACTIVE,
4738                                   NL80211_MESH_POWER_MAX,
4739                                   mask, NL80211_MESHCONF_POWER_MODE,
4740                                   nla_get_u32);
4741         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4742                                   0, 65535, mask,
4743                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4744         if (mask_out)
4745                 *mask_out = mask;
4746
4747         return 0;
4748
4749 #undef FILL_IN_MESH_PARAM_IF_SET
4750 }
4751
4752 static int nl80211_parse_mesh_setup(struct genl_info *info,
4753                                      struct mesh_setup *setup)
4754 {
4755         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4756
4757         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4758                 return -EINVAL;
4759         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4760                              info->attrs[NL80211_ATTR_MESH_SETUP],
4761                              nl80211_mesh_setup_params_policy))
4762                 return -EINVAL;
4763
4764         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4765                 setup->sync_method =
4766                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4767                  IEEE80211_SYNC_METHOD_VENDOR :
4768                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4769
4770         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4771                 setup->path_sel_proto =
4772                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4773                  IEEE80211_PATH_PROTOCOL_VENDOR :
4774                  IEEE80211_PATH_PROTOCOL_HWMP;
4775
4776         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4777                 setup->path_metric =
4778                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4779                  IEEE80211_PATH_METRIC_VENDOR :
4780                  IEEE80211_PATH_METRIC_AIRTIME;
4781
4782
4783         if (tb[NL80211_MESH_SETUP_IE]) {
4784                 struct nlattr *ieattr =
4785                         tb[NL80211_MESH_SETUP_IE];
4786                 if (!is_valid_ie_attr(ieattr))
4787                         return -EINVAL;
4788                 setup->ie = nla_data(ieattr);
4789                 setup->ie_len = nla_len(ieattr);
4790         }
4791         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4792         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4793
4794         return 0;
4795 }
4796
4797 static int nl80211_update_mesh_config(struct sk_buff *skb,
4798                                       struct genl_info *info)
4799 {
4800         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4801         struct net_device *dev = info->user_ptr[1];
4802         struct wireless_dev *wdev = dev->ieee80211_ptr;
4803         struct mesh_config cfg;
4804         u32 mask;
4805         int err;
4806
4807         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4808                 return -EOPNOTSUPP;
4809
4810         if (!rdev->ops->update_mesh_config)
4811                 return -EOPNOTSUPP;
4812
4813         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4814         if (err)
4815                 return err;
4816
4817         wdev_lock(wdev);
4818         if (!wdev->mesh_id_len)
4819                 err = -ENOLINK;
4820
4821         if (!err)
4822                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4823
4824         wdev_unlock(wdev);
4825
4826         return err;
4827 }
4828
4829 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4830 {
4831         const struct ieee80211_regdomain *regdom;
4832         struct sk_buff *msg;
4833         void *hdr = NULL;
4834         struct nlattr *nl_reg_rules;
4835         unsigned int i;
4836         int err = -EINVAL;
4837
4838         mutex_lock(&cfg80211_mutex);
4839
4840         if (!cfg80211_regdomain)
4841                 goto out;
4842
4843         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4844         if (!msg) {
4845                 err = -ENOBUFS;
4846                 goto out;
4847         }
4848
4849         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4850                              NL80211_CMD_GET_REG);
4851         if (!hdr)
4852                 goto put_failure;
4853
4854         if (reg_last_request_cell_base() &&
4855             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4856                         NL80211_USER_REG_HINT_CELL_BASE))
4857                 goto nla_put_failure;
4858
4859         rcu_read_lock();
4860         regdom = rcu_dereference(cfg80211_regdomain);
4861
4862         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4863             (regdom->dfs_region &&
4864              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4865                 goto nla_put_failure_rcu;
4866
4867         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4868         if (!nl_reg_rules)
4869                 goto nla_put_failure_rcu;
4870
4871         for (i = 0; i < regdom->n_reg_rules; i++) {
4872                 struct nlattr *nl_reg_rule;
4873                 const struct ieee80211_reg_rule *reg_rule;
4874                 const struct ieee80211_freq_range *freq_range;
4875                 const struct ieee80211_power_rule *power_rule;
4876
4877                 reg_rule = &regdom->reg_rules[i];
4878                 freq_range = &reg_rule->freq_range;
4879                 power_rule = &reg_rule->power_rule;
4880
4881                 nl_reg_rule = nla_nest_start(msg, i);
4882                 if (!nl_reg_rule)
4883                         goto nla_put_failure_rcu;
4884
4885                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4886                                 reg_rule->flags) ||
4887                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4888                                 freq_range->start_freq_khz) ||
4889                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4890                                 freq_range->end_freq_khz) ||
4891                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4892                                 freq_range->max_bandwidth_khz) ||
4893                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4894                                 power_rule->max_antenna_gain) ||
4895                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4896                                 power_rule->max_eirp))
4897                         goto nla_put_failure_rcu;
4898
4899                 nla_nest_end(msg, nl_reg_rule);
4900         }
4901         rcu_read_unlock();
4902
4903         nla_nest_end(msg, nl_reg_rules);
4904
4905         genlmsg_end(msg, hdr);
4906         err = genlmsg_reply(msg, info);
4907         goto out;
4908
4909 nla_put_failure_rcu:
4910         rcu_read_unlock();
4911 nla_put_failure:
4912         genlmsg_cancel(msg, hdr);
4913 put_failure:
4914         nlmsg_free(msg);
4915         err = -EMSGSIZE;
4916 out:
4917         mutex_unlock(&cfg80211_mutex);
4918         return err;
4919 }
4920
4921 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4922 {
4923         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4924         struct nlattr *nl_reg_rule;
4925         char *alpha2 = NULL;
4926         int rem_reg_rules = 0, r = 0;
4927         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4928         u8 dfs_region = 0;
4929         struct ieee80211_regdomain *rd = NULL;
4930
4931         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4932                 return -EINVAL;
4933
4934         if (!info->attrs[NL80211_ATTR_REG_RULES])
4935                 return -EINVAL;
4936
4937         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4938
4939         if (info->attrs[NL80211_ATTR_DFS_REGION])
4940                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4941
4942         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4943                             rem_reg_rules) {
4944                 num_rules++;
4945                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4946                         return -EINVAL;
4947         }
4948
4949         size_of_regd = sizeof(struct ieee80211_regdomain) +
4950                        num_rules * sizeof(struct ieee80211_reg_rule);
4951
4952         rd = kzalloc(size_of_regd, GFP_KERNEL);
4953         if (!rd)
4954                 return -ENOMEM;
4955
4956         rd->n_reg_rules = num_rules;
4957         rd->alpha2[0] = alpha2[0];
4958         rd->alpha2[1] = alpha2[1];
4959
4960         /*
4961          * Disable DFS master mode if the DFS region was
4962          * not supported or known on this kernel.
4963          */
4964         if (reg_supported_dfs_region(dfs_region))
4965                 rd->dfs_region = dfs_region;
4966
4967         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4968                             rem_reg_rules) {
4969                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4970                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4971                           reg_rule_policy);
4972                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4973                 if (r)
4974                         goto bad_reg;
4975
4976                 rule_idx++;
4977
4978                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4979                         r = -EINVAL;
4980                         goto bad_reg;
4981                 }
4982         }
4983
4984         mutex_lock(&cfg80211_mutex);
4985
4986         r = set_regdom(rd);
4987         /* set_regdom took ownership */
4988         rd = NULL;
4989         mutex_unlock(&cfg80211_mutex);
4990
4991  bad_reg:
4992         kfree(rd);
4993         return r;
4994 }
4995
4996 static int validate_scan_freqs(struct nlattr *freqs)
4997 {
4998         struct nlattr *attr1, *attr2;
4999         int n_channels = 0, tmp1, tmp2;
5000
5001         nla_for_each_nested(attr1, freqs, tmp1) {
5002                 n_channels++;
5003                 /*
5004                  * Some hardware has a limited channel list for
5005                  * scanning, and it is pretty much nonsensical
5006                  * to scan for a channel twice, so disallow that
5007                  * and don't require drivers to check that the
5008                  * channel list they get isn't longer than what
5009                  * they can scan, as long as they can scan all
5010                  * the channels they registered at once.
5011                  */
5012                 nla_for_each_nested(attr2, freqs, tmp2)
5013                         if (attr1 != attr2 &&
5014                             nla_get_u32(attr1) == nla_get_u32(attr2))
5015                                 return 0;
5016         }
5017
5018         return n_channels;
5019 }
5020
5021 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5022 {
5023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5024         struct wireless_dev *wdev = info->user_ptr[1];
5025         struct cfg80211_scan_request *request;
5026         struct nlattr *attr;
5027         struct wiphy *wiphy;
5028         int err, tmp, n_ssids = 0, n_channels, i;
5029         size_t ie_len;
5030
5031         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5032                 return -EINVAL;
5033
5034         wiphy = &rdev->wiphy;
5035
5036         if (!rdev->ops->scan)
5037                 return -EOPNOTSUPP;
5038
5039         if (rdev->scan_req)
5040                 return -EBUSY;
5041
5042         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5043                 n_channels = validate_scan_freqs(
5044                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5045                 if (!n_channels)
5046                         return -EINVAL;
5047         } else {
5048                 enum ieee80211_band band;
5049                 n_channels = 0;
5050
5051                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5052                         if (wiphy->bands[band])
5053                                 n_channels += wiphy->bands[band]->n_channels;
5054         }
5055
5056         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5057                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5058                         n_ssids++;
5059
5060         if (n_ssids > wiphy->max_scan_ssids)
5061                 return -EINVAL;
5062
5063         if (info->attrs[NL80211_ATTR_IE])
5064                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5065         else
5066                 ie_len = 0;
5067
5068         if (ie_len > wiphy->max_scan_ie_len)
5069                 return -EINVAL;
5070
5071         request = kzalloc(sizeof(*request)
5072                         + sizeof(*request->ssids) * n_ssids
5073                         + sizeof(*request->channels) * n_channels
5074                         + ie_len, GFP_KERNEL);
5075         if (!request)
5076                 return -ENOMEM;
5077
5078         if (n_ssids)
5079                 request->ssids = (void *)&request->channels[n_channels];
5080         request->n_ssids = n_ssids;
5081         if (ie_len) {
5082                 if (request->ssids)
5083                         request->ie = (void *)(request->ssids + n_ssids);
5084                 else
5085                         request->ie = (void *)(request->channels + n_channels);
5086         }
5087
5088         i = 0;
5089         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5090                 /* user specified, bail out if channel not found */
5091                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5092                         struct ieee80211_channel *chan;
5093
5094                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5095
5096                         if (!chan) {
5097                                 err = -EINVAL;
5098                                 goto out_free;
5099                         }
5100
5101                         /* ignore disabled channels */
5102                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5103                                 continue;
5104
5105                         request->channels[i] = chan;
5106                         i++;
5107                 }
5108         } else {
5109                 enum ieee80211_band band;
5110
5111                 /* all channels */
5112                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5113                         int j;
5114                         if (!wiphy->bands[band])
5115                                 continue;
5116                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5117                                 struct ieee80211_channel *chan;
5118
5119                                 chan = &wiphy->bands[band]->channels[j];
5120
5121                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5122                                         continue;
5123
5124                                 request->channels[i] = chan;
5125                                 i++;
5126                         }
5127                 }
5128         }
5129
5130         if (!i) {
5131                 err = -EINVAL;
5132                 goto out_free;
5133         }
5134
5135         request->n_channels = i;
5136
5137         i = 0;
5138         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5139                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5140                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5141                                 err = -EINVAL;
5142                                 goto out_free;
5143                         }
5144                         request->ssids[i].ssid_len = nla_len(attr);
5145                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5146                         i++;
5147                 }
5148         }
5149
5150         if (info->attrs[NL80211_ATTR_IE]) {
5151                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5152                 memcpy((void *)request->ie,
5153                        nla_data(info->attrs[NL80211_ATTR_IE]),
5154                        request->ie_len);
5155         }
5156
5157         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5158                 if (wiphy->bands[i])
5159                         request->rates[i] =
5160                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5161
5162         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5163                 nla_for_each_nested(attr,
5164                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5165                                     tmp) {
5166                         enum ieee80211_band band = nla_type(attr);
5167
5168                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5169                                 err = -EINVAL;
5170                                 goto out_free;
5171                         }
5172                         err = ieee80211_get_ratemask(wiphy->bands[band],
5173                                                      nla_data(attr),
5174                                                      nla_len(attr),
5175                                                      &request->rates[band]);
5176                         if (err)
5177                                 goto out_free;
5178                 }
5179         }
5180
5181         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5182                 request->flags = nla_get_u32(
5183                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5184                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5185                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5186                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5187                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5188                         err = -EOPNOTSUPP;
5189                         goto out_free;
5190                 }
5191         }
5192
5193         request->no_cck =
5194                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5195
5196         request->wdev = wdev;
5197         request->wiphy = &rdev->wiphy;
5198         request->scan_start = jiffies;
5199
5200         rdev->scan_req = request;
5201         err = rdev_scan(rdev, request);
5202
5203         if (!err) {
5204                 nl80211_send_scan_start(rdev, wdev);
5205                 if (wdev->netdev)
5206                         dev_hold(wdev->netdev);
5207         } else {
5208  out_free:
5209                 rdev->scan_req = NULL;
5210                 kfree(request);
5211         }
5212
5213         return err;
5214 }
5215
5216 static int nl80211_start_sched_scan(struct sk_buff *skb,
5217                                     struct genl_info *info)
5218 {
5219         struct cfg80211_sched_scan_request *request;
5220         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5221         struct net_device *dev = info->user_ptr[1];
5222         struct nlattr *attr;
5223         struct wiphy *wiphy;
5224         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5225         u32 interval;
5226         enum ieee80211_band band;
5227         size_t ie_len;
5228         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5229
5230         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5231             !rdev->ops->sched_scan_start)
5232                 return -EOPNOTSUPP;
5233
5234         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5235                 return -EINVAL;
5236
5237         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5238                 return -EINVAL;
5239
5240         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5241         if (interval == 0)
5242                 return -EINVAL;
5243
5244         wiphy = &rdev->wiphy;
5245
5246         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5247                 n_channels = validate_scan_freqs(
5248                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5249                 if (!n_channels)
5250                         return -EINVAL;
5251         } else {
5252                 n_channels = 0;
5253
5254                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5255                         if (wiphy->bands[band])
5256                                 n_channels += wiphy->bands[band]->n_channels;
5257         }
5258
5259         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5260                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5261                                     tmp)
5262                         n_ssids++;
5263
5264         if (n_ssids > wiphy->max_sched_scan_ssids)
5265                 return -EINVAL;
5266
5267         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5268                 nla_for_each_nested(attr,
5269                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5270                                     tmp)
5271                         n_match_sets++;
5272
5273         if (n_match_sets > wiphy->max_match_sets)
5274                 return -EINVAL;
5275
5276         if (info->attrs[NL80211_ATTR_IE])
5277                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5278         else
5279                 ie_len = 0;
5280
5281         if (ie_len > wiphy->max_sched_scan_ie_len)
5282                 return -EINVAL;
5283
5284         mutex_lock(&rdev->sched_scan_mtx);
5285
5286         if (rdev->sched_scan_req) {
5287                 err = -EINPROGRESS;
5288                 goto out;
5289         }
5290
5291         request = kzalloc(sizeof(*request)
5292                         + sizeof(*request->ssids) * n_ssids
5293                         + sizeof(*request->match_sets) * n_match_sets
5294                         + sizeof(*request->channels) * n_channels
5295                         + ie_len, GFP_KERNEL);
5296         if (!request) {
5297                 err = -ENOMEM;
5298                 goto out;
5299         }
5300
5301         if (n_ssids)
5302                 request->ssids = (void *)&request->channels[n_channels];
5303         request->n_ssids = n_ssids;
5304         if (ie_len) {
5305                 if (request->ssids)
5306                         request->ie = (void *)(request->ssids + n_ssids);
5307                 else
5308                         request->ie = (void *)(request->channels + n_channels);
5309         }
5310
5311         if (n_match_sets) {
5312                 if (request->ie)
5313                         request->match_sets = (void *)(request->ie + ie_len);
5314                 else if (request->ssids)
5315                         request->match_sets =
5316                                 (void *)(request->ssids + n_ssids);
5317                 else
5318                         request->match_sets =
5319                                 (void *)(request->channels + n_channels);
5320         }
5321         request->n_match_sets = n_match_sets;
5322
5323         i = 0;
5324         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5325                 /* user specified, bail out if channel not found */
5326                 nla_for_each_nested(attr,
5327                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5328                                     tmp) {
5329                         struct ieee80211_channel *chan;
5330
5331                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5332
5333                         if (!chan) {
5334                                 err = -EINVAL;
5335                                 goto out_free;
5336                         }
5337
5338                         /* ignore disabled channels */
5339                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5340                                 continue;
5341
5342                         request->channels[i] = chan;
5343                         i++;
5344                 }
5345         } else {
5346                 /* all channels */
5347                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5348                         int j;
5349                         if (!wiphy->bands[band])
5350                                 continue;
5351                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5352                                 struct ieee80211_channel *chan;
5353
5354                                 chan = &wiphy->bands[band]->channels[j];
5355
5356                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5357                                         continue;
5358
5359                                 request->channels[i] = chan;
5360                                 i++;
5361                         }
5362                 }
5363         }
5364
5365         if (!i) {
5366                 err = -EINVAL;
5367                 goto out_free;
5368         }
5369
5370         request->n_channels = i;
5371
5372         i = 0;
5373         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5374                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5375                                     tmp) {
5376                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5377                                 err = -EINVAL;
5378                                 goto out_free;
5379                         }
5380                         request->ssids[i].ssid_len = nla_len(attr);
5381                         memcpy(request->ssids[i].ssid, nla_data(attr),
5382                                nla_len(attr));
5383                         i++;
5384                 }
5385         }
5386
5387         i = 0;
5388         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5389                 nla_for_each_nested(attr,
5390                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5391                                     tmp) {
5392                         struct nlattr *ssid, *rssi;
5393
5394                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5395                                   nla_data(attr), nla_len(attr),
5396                                   nl80211_match_policy);
5397                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5398                         if (ssid) {
5399                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5400                                         err = -EINVAL;
5401                                         goto out_free;
5402                                 }
5403                                 memcpy(request->match_sets[i].ssid.ssid,
5404                                        nla_data(ssid), nla_len(ssid));
5405                                 request->match_sets[i].ssid.ssid_len =
5406                                         nla_len(ssid);
5407                         }
5408                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5409                         if (rssi)
5410                                 request->rssi_thold = nla_get_u32(rssi);
5411                         else
5412                                 request->rssi_thold =
5413                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5414                         i++;
5415                 }
5416         }
5417
5418         if (info->attrs[NL80211_ATTR_IE]) {
5419                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5420                 memcpy((void *)request->ie,
5421                        nla_data(info->attrs[NL80211_ATTR_IE]),
5422                        request->ie_len);
5423         }
5424
5425         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5426                 request->flags = nla_get_u32(
5427                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5428                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5429                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5430                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5431                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5432                         err = -EOPNOTSUPP;
5433                         goto out_free;
5434                 }
5435         }
5436
5437         request->dev = dev;
5438         request->wiphy = &rdev->wiphy;
5439         request->interval = interval;
5440         request->scan_start = jiffies;
5441
5442         err = rdev_sched_scan_start(rdev, dev, request);
5443         if (!err) {
5444                 rdev->sched_scan_req = request;
5445                 nl80211_send_sched_scan(rdev, dev,
5446                                         NL80211_CMD_START_SCHED_SCAN);
5447                 goto out;
5448         }
5449
5450 out_free:
5451         kfree(request);
5452 out:
5453         mutex_unlock(&rdev->sched_scan_mtx);
5454         return err;
5455 }
5456
5457 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5458                                    struct genl_info *info)
5459 {
5460         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5461         int err;
5462
5463         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5464             !rdev->ops->sched_scan_stop)
5465                 return -EOPNOTSUPP;
5466
5467         mutex_lock(&rdev->sched_scan_mtx);
5468         err = __cfg80211_stop_sched_scan(rdev, false);
5469         mutex_unlock(&rdev->sched_scan_mtx);
5470
5471         return err;
5472 }
5473
5474 static int nl80211_start_radar_detection(struct sk_buff *skb,
5475                                          struct genl_info *info)
5476 {
5477         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5478         struct net_device *dev = info->user_ptr[1];
5479         struct wireless_dev *wdev = dev->ieee80211_ptr;
5480         struct cfg80211_chan_def chandef;
5481         int err;
5482
5483         err = nl80211_parse_chandef(rdev, info, &chandef);
5484         if (err)
5485                 return err;
5486
5487         if (wdev->cac_started)
5488                 return -EBUSY;
5489
5490         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5491         if (err < 0)
5492                 return err;
5493
5494         if (err == 0)
5495                 return -EINVAL;
5496
5497         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5498                 return -EINVAL;
5499
5500         if (!rdev->ops->start_radar_detection)
5501                 return -EOPNOTSUPP;
5502
5503         mutex_lock(&rdev->devlist_mtx);
5504         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5505                                            chandef.chan, CHAN_MODE_SHARED,
5506                                            BIT(chandef.width));
5507         if (err)
5508                 goto err_locked;
5509
5510         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5511         if (!err) {
5512                 wdev->channel = chandef.chan;
5513                 wdev->cac_started = true;
5514                 wdev->cac_start_time = jiffies;
5515         }
5516 err_locked:
5517         mutex_unlock(&rdev->devlist_mtx);
5518
5519         return err;
5520 }
5521
5522 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5523                             u32 seq, int flags,
5524                             struct cfg80211_registered_device *rdev,
5525                             struct wireless_dev *wdev,
5526                             struct cfg80211_internal_bss *intbss)
5527 {
5528         struct cfg80211_bss *res = &intbss->pub;
5529         const struct cfg80211_bss_ies *ies;
5530         void *hdr;
5531         struct nlattr *bss;
5532         bool tsf = false;
5533
5534         ASSERT_WDEV_LOCK(wdev);
5535
5536         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5537                              NL80211_CMD_NEW_SCAN_RESULTS);
5538         if (!hdr)
5539                 return -1;
5540
5541         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5542
5543         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
5544             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5545                 goto nla_put_failure;
5546
5547         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5548         if (!bss)
5549                 goto nla_put_failure;
5550         if ((!is_zero_ether_addr(res->bssid) &&
5551              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5552                 goto nla_put_failure;
5553
5554         rcu_read_lock();
5555         ies = rcu_dereference(res->ies);
5556         if (ies) {
5557                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5558                         goto fail_unlock_rcu;
5559                 tsf = true;
5560                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5561                                         ies->len, ies->data))
5562                         goto fail_unlock_rcu;
5563         }
5564         ies = rcu_dereference(res->beacon_ies);
5565         if (ies) {
5566                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5567                         goto fail_unlock_rcu;
5568                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5569                                         ies->len, ies->data))
5570                         goto fail_unlock_rcu;
5571         }
5572         rcu_read_unlock();
5573
5574         if (res->beacon_interval &&
5575             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5576                 goto nla_put_failure;
5577         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5578             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5579             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5580                         jiffies_to_msecs(jiffies - intbss->ts)))
5581                 goto nla_put_failure;
5582
5583         switch (rdev->wiphy.signal_type) {
5584         case CFG80211_SIGNAL_TYPE_MBM:
5585                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5586                         goto nla_put_failure;
5587                 break;
5588         case CFG80211_SIGNAL_TYPE_UNSPEC:
5589                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5590                         goto nla_put_failure;
5591                 break;
5592         default:
5593                 break;
5594         }
5595
5596         switch (wdev->iftype) {
5597         case NL80211_IFTYPE_P2P_CLIENT:
5598         case NL80211_IFTYPE_STATION:
5599                 if (intbss == wdev->current_bss &&
5600                     nla_put_u32(msg, NL80211_BSS_STATUS,
5601                                 NL80211_BSS_STATUS_ASSOCIATED))
5602                         goto nla_put_failure;
5603                 break;
5604         case NL80211_IFTYPE_ADHOC:
5605                 if (intbss == wdev->current_bss &&
5606                     nla_put_u32(msg, NL80211_BSS_STATUS,
5607                                 NL80211_BSS_STATUS_IBSS_JOINED))
5608                         goto nla_put_failure;
5609                 break;
5610         default:
5611                 break;
5612         }
5613
5614         nla_nest_end(msg, bss);
5615
5616         return genlmsg_end(msg, hdr);
5617
5618  fail_unlock_rcu:
5619         rcu_read_unlock();
5620  nla_put_failure:
5621         genlmsg_cancel(msg, hdr);
5622         return -EMSGSIZE;
5623 }
5624
5625 static int nl80211_dump_scan(struct sk_buff *skb,
5626                              struct netlink_callback *cb)
5627 {
5628         struct cfg80211_registered_device *rdev;
5629         struct net_device *dev;
5630         struct cfg80211_internal_bss *scan;
5631         struct wireless_dev *wdev;
5632         int start = cb->args[1], idx = 0;
5633         int err;
5634
5635         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
5636         if (err)
5637                 return err;
5638
5639         wdev = dev->ieee80211_ptr;
5640
5641         wdev_lock(wdev);
5642         spin_lock_bh(&rdev->bss_lock);
5643         cfg80211_bss_expire(rdev);
5644
5645         cb->seq = rdev->bss_generation;
5646
5647         list_for_each_entry(scan, &rdev->bss_list, list) {
5648                 if (++idx <= start)
5649                         continue;
5650                 if (nl80211_send_bss(skb, cb,
5651                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5652                                 rdev, wdev, scan) < 0) {
5653                         idx--;
5654                         break;
5655                 }
5656         }
5657
5658         spin_unlock_bh(&rdev->bss_lock);
5659         wdev_unlock(wdev);
5660
5661         cb->args[1] = idx;
5662         nl80211_finish_netdev_dump(rdev);
5663
5664         return skb->len;
5665 }
5666
5667 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5668                                 int flags, struct net_device *dev,
5669                                 struct survey_info *survey)
5670 {
5671         void *hdr;
5672         struct nlattr *infoattr;
5673
5674         hdr = nl80211hdr_put(msg, portid, seq, flags,
5675                              NL80211_CMD_NEW_SURVEY_RESULTS);
5676         if (!hdr)
5677                 return -ENOMEM;
5678
5679         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5680                 goto nla_put_failure;
5681
5682         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5683         if (!infoattr)
5684                 goto nla_put_failure;
5685
5686         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5687                         survey->channel->center_freq))
5688                 goto nla_put_failure;
5689
5690         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5691             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5692                 goto nla_put_failure;
5693         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5694             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5695                 goto nla_put_failure;
5696         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5697             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5698                         survey->channel_time))
5699                 goto nla_put_failure;
5700         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5701             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5702                         survey->channel_time_busy))
5703                 goto nla_put_failure;
5704         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5705             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5706                         survey->channel_time_ext_busy))
5707                 goto nla_put_failure;
5708         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5709             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5710                         survey->channel_time_rx))
5711                 goto nla_put_failure;
5712         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5713             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5714                         survey->channel_time_tx))
5715                 goto nla_put_failure;
5716
5717         nla_nest_end(msg, infoattr);
5718
5719         return genlmsg_end(msg, hdr);
5720
5721  nla_put_failure:
5722         genlmsg_cancel(msg, hdr);
5723         return -EMSGSIZE;
5724 }
5725
5726 static int nl80211_dump_survey(struct sk_buff *skb,
5727                         struct netlink_callback *cb)
5728 {
5729         struct survey_info survey;
5730         struct cfg80211_registered_device *dev;
5731         struct net_device *netdev;
5732         int survey_idx = cb->args[1];
5733         int res;
5734
5735         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5736         if (res)
5737                 return res;
5738
5739         if (!dev->ops->dump_survey) {
5740                 res = -EOPNOTSUPP;
5741                 goto out_err;
5742         }
5743
5744         while (1) {
5745                 struct ieee80211_channel *chan;
5746
5747                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5748                 if (res == -ENOENT)
5749                         break;
5750                 if (res)
5751                         goto out_err;
5752
5753                 /* Survey without a channel doesn't make sense */
5754                 if (!survey.channel) {
5755                         res = -EINVAL;
5756                         goto out;
5757                 }
5758
5759                 chan = ieee80211_get_channel(&dev->wiphy,
5760                                              survey.channel->center_freq);
5761                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5762                         survey_idx++;
5763                         continue;
5764                 }
5765
5766                 if (nl80211_send_survey(skb,
5767                                 NETLINK_CB(cb->skb).portid,
5768                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5769                                 netdev,
5770                                 &survey) < 0)
5771                         goto out;
5772                 survey_idx++;
5773         }
5774
5775  out:
5776         cb->args[1] = survey_idx;
5777         res = skb->len;
5778  out_err:
5779         nl80211_finish_netdev_dump(dev);
5780         return res;
5781 }
5782
5783 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5784 {
5785         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5786                                   NL80211_WPA_VERSION_2));
5787 }
5788
5789 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5790 {
5791         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5792         struct net_device *dev = info->user_ptr[1];
5793         struct ieee80211_channel *chan;
5794         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5795         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5796         enum nl80211_auth_type auth_type;
5797         struct key_parse key;
5798         bool local_state_change;
5799
5800         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5801                 return -EINVAL;
5802
5803         if (!info->attrs[NL80211_ATTR_MAC])
5804                 return -EINVAL;
5805
5806         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5807                 return -EINVAL;
5808
5809         if (!info->attrs[NL80211_ATTR_SSID])
5810                 return -EINVAL;
5811
5812         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5813                 return -EINVAL;
5814
5815         err = nl80211_parse_key(info, &key);
5816         if (err)
5817                 return err;
5818
5819         if (key.idx >= 0) {
5820                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5821                         return -EINVAL;
5822                 if (!key.p.key || !key.p.key_len)
5823                         return -EINVAL;
5824                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5825                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5826                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5827                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5828                         return -EINVAL;
5829                 if (key.idx > 4)
5830                         return -EINVAL;
5831         } else {
5832                 key.p.key_len = 0;
5833                 key.p.key = NULL;
5834         }
5835
5836         if (key.idx >= 0) {
5837                 int i;
5838                 bool ok = false;
5839                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5840                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5841                                 ok = true;
5842                                 break;
5843                         }
5844                 }
5845                 if (!ok)
5846                         return -EINVAL;
5847         }
5848
5849         if (!rdev->ops->auth)
5850                 return -EOPNOTSUPP;
5851
5852         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5853             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5854                 return -EOPNOTSUPP;
5855
5856         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5857         chan = ieee80211_get_channel(&rdev->wiphy,
5858                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5859         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5860                 return -EINVAL;
5861
5862         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5863         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5864
5865         if (info->attrs[NL80211_ATTR_IE]) {
5866                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5867                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5868         }
5869
5870         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5871         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5872                 return -EINVAL;
5873
5874         if (auth_type == NL80211_AUTHTYPE_SAE &&
5875             !info->attrs[NL80211_ATTR_SAE_DATA])
5876                 return -EINVAL;
5877
5878         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5879                 if (auth_type != NL80211_AUTHTYPE_SAE)
5880                         return -EINVAL;
5881                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5882                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5883                 /* need to include at least Auth Transaction and Status Code */
5884                 if (sae_data_len < 4)
5885                         return -EINVAL;
5886         }
5887
5888         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5889
5890         /*
5891          * Since we no longer track auth state, ignore
5892          * requests to only change local state.
5893          */
5894         if (local_state_change)
5895                 return 0;
5896
5897         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5898                                   ssid, ssid_len, ie, ie_len,
5899                                   key.p.key, key.p.key_len, key.idx,
5900                                   sae_data, sae_data_len);
5901 }
5902
5903 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5904                                    struct genl_info *info,
5905                                    struct cfg80211_crypto_settings *settings,
5906                                    int cipher_limit)
5907 {
5908         memset(settings, 0, sizeof(*settings));
5909
5910         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5911
5912         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5913                 u16 proto;
5914                 proto = nla_get_u16(
5915                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5916                 settings->control_port_ethertype = cpu_to_be16(proto);
5917                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5918                     proto != ETH_P_PAE)
5919                         return -EINVAL;
5920                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5921                         settings->control_port_no_encrypt = true;
5922         } else
5923                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5924
5925         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5926                 void *data;
5927                 int len, i;
5928
5929                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5930                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5931                 settings->n_ciphers_pairwise = len / sizeof(u32);
5932
5933                 if (len % sizeof(u32))
5934                         return -EINVAL;
5935
5936                 if (settings->n_ciphers_pairwise > cipher_limit)
5937                         return -EINVAL;
5938
5939                 memcpy(settings->ciphers_pairwise, data, len);
5940
5941                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5942                         if (!cfg80211_supported_cipher_suite(
5943                                         &rdev->wiphy,
5944                                         settings->ciphers_pairwise[i]))
5945                                 return -EINVAL;
5946         }
5947
5948         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5949                 settings->cipher_group =
5950                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5951                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5952                                                      settings->cipher_group))
5953                         return -EINVAL;
5954         }
5955
5956         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5957                 settings->wpa_versions =
5958                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5959                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5960                         return -EINVAL;
5961         }
5962
5963         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5964                 void *data;
5965                 int len;
5966
5967                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5968                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5969                 settings->n_akm_suites = len / sizeof(u32);
5970
5971                 if (len % sizeof(u32))
5972                         return -EINVAL;
5973
5974                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5975                         return -EINVAL;
5976
5977                 memcpy(settings->akm_suites, data, len);
5978         }
5979
5980         return 0;
5981 }
5982
5983 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5984 {
5985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5986         struct net_device *dev = info->user_ptr[1];
5987         struct ieee80211_channel *chan;
5988         struct cfg80211_assoc_request req = {};
5989         const u8 *bssid, *ssid;
5990         int err, ssid_len = 0;
5991
5992         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5993                 return -EINVAL;
5994
5995         if (!info->attrs[NL80211_ATTR_MAC] ||
5996             !info->attrs[NL80211_ATTR_SSID] ||
5997             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5998                 return -EINVAL;
5999
6000         if (!rdev->ops->assoc)
6001                 return -EOPNOTSUPP;
6002
6003         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6004             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6005                 return -EOPNOTSUPP;
6006
6007         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6008
6009         chan = ieee80211_get_channel(&rdev->wiphy,
6010                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6011         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6012                 return -EINVAL;
6013
6014         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6015         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6016
6017         if (info->attrs[NL80211_ATTR_IE]) {
6018                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6019                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6020         }
6021
6022         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6023                 enum nl80211_mfp mfp =
6024                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6025                 if (mfp == NL80211_MFP_REQUIRED)
6026                         req.use_mfp = true;
6027                 else if (mfp != NL80211_MFP_NO)
6028                         return -EINVAL;
6029         }
6030
6031         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6032                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6033
6034         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6035                 req.flags |= ASSOC_REQ_DISABLE_HT;
6036
6037         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6038                 memcpy(&req.ht_capa_mask,
6039                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6040                        sizeof(req.ht_capa_mask));
6041
6042         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6043                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6044                         return -EINVAL;
6045                 memcpy(&req.ht_capa,
6046                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6047                        sizeof(req.ht_capa));
6048         }
6049
6050         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6051                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6052
6053         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6054                 memcpy(&req.vht_capa_mask,
6055                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6056                        sizeof(req.vht_capa_mask));
6057
6058         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6059                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6060                         return -EINVAL;
6061                 memcpy(&req.vht_capa,
6062                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6063                        sizeof(req.vht_capa));
6064         }
6065
6066         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6067         if (!err)
6068                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6069                                           ssid, ssid_len, &req);
6070
6071         return err;
6072 }
6073
6074 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6075 {
6076         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6077         struct net_device *dev = info->user_ptr[1];
6078         const u8 *ie = NULL, *bssid;
6079         int ie_len = 0;
6080         u16 reason_code;
6081         bool local_state_change;
6082
6083         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6084                 return -EINVAL;
6085
6086         if (!info->attrs[NL80211_ATTR_MAC])
6087                 return -EINVAL;
6088
6089         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6090                 return -EINVAL;
6091
6092         if (!rdev->ops->deauth)
6093                 return -EOPNOTSUPP;
6094
6095         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6096             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6097                 return -EOPNOTSUPP;
6098
6099         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6100
6101         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6102         if (reason_code == 0) {
6103                 /* Reason Code 0 is reserved */
6104                 return -EINVAL;
6105         }
6106
6107         if (info->attrs[NL80211_ATTR_IE]) {
6108                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6109                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6110         }
6111
6112         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6113
6114         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6115                                     local_state_change);
6116 }
6117
6118 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6119 {
6120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6121         struct net_device *dev = info->user_ptr[1];
6122         const u8 *ie = NULL, *bssid;
6123         int ie_len = 0;
6124         u16 reason_code;
6125         bool local_state_change;
6126
6127         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6128                 return -EINVAL;
6129
6130         if (!info->attrs[NL80211_ATTR_MAC])
6131                 return -EINVAL;
6132
6133         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6134                 return -EINVAL;
6135
6136         if (!rdev->ops->disassoc)
6137                 return -EOPNOTSUPP;
6138
6139         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6140             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6141                 return -EOPNOTSUPP;
6142
6143         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6144
6145         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6146         if (reason_code == 0) {
6147                 /* Reason Code 0 is reserved */
6148                 return -EINVAL;
6149         }
6150
6151         if (info->attrs[NL80211_ATTR_IE]) {
6152                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6153                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6154         }
6155
6156         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6157
6158         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6159                                       local_state_change);
6160 }
6161
6162 static bool
6163 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6164                          int mcast_rate[IEEE80211_NUM_BANDS],
6165                          int rateval)
6166 {
6167         struct wiphy *wiphy = &rdev->wiphy;
6168         bool found = false;
6169         int band, i;
6170
6171         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6172                 struct ieee80211_supported_band *sband;
6173
6174                 sband = wiphy->bands[band];
6175                 if (!sband)
6176                         continue;
6177
6178                 for (i = 0; i < sband->n_bitrates; i++) {
6179                         if (sband->bitrates[i].bitrate == rateval) {
6180                                 mcast_rate[band] = i + 1;
6181                                 found = true;
6182                                 break;
6183                         }
6184                 }
6185         }
6186
6187         return found;
6188 }
6189
6190 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6191 {
6192         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6193         struct net_device *dev = info->user_ptr[1];
6194         struct cfg80211_ibss_params ibss;
6195         struct wiphy *wiphy;
6196         struct cfg80211_cached_keys *connkeys = NULL;
6197         int err;
6198
6199         memset(&ibss, 0, sizeof(ibss));
6200
6201         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6202                 return -EINVAL;
6203
6204         if (!info->attrs[NL80211_ATTR_SSID] ||
6205             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6206                 return -EINVAL;
6207
6208         ibss.beacon_interval = 100;
6209
6210         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6211                 ibss.beacon_interval =
6212                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6213                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6214                         return -EINVAL;
6215         }
6216
6217         if (!rdev->ops->join_ibss)
6218                 return -EOPNOTSUPP;
6219
6220         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6221                 return -EOPNOTSUPP;
6222
6223         wiphy = &rdev->wiphy;
6224
6225         if (info->attrs[NL80211_ATTR_MAC]) {
6226                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6227
6228                 if (!is_valid_ether_addr(ibss.bssid))
6229                         return -EINVAL;
6230         }
6231         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6232         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6233
6234         if (info->attrs[NL80211_ATTR_IE]) {
6235                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6236                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6237         }
6238
6239         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6240         if (err)
6241                 return err;
6242
6243         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6244                 return -EINVAL;
6245
6246         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
6247                 return -EINVAL;
6248         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
6249             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
6250                 return -EINVAL;
6251
6252         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6253         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6254
6255         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6256                 u8 *rates =
6257                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6258                 int n_rates =
6259                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6260                 struct ieee80211_supported_band *sband =
6261                         wiphy->bands[ibss.chandef.chan->band];
6262
6263                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6264                                              &ibss.basic_rates);
6265                 if (err)
6266                         return err;
6267         }
6268
6269         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6270             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6271                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6272                 return -EINVAL;
6273
6274         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6275                 bool no_ht = false;
6276
6277                 connkeys = nl80211_parse_connkeys(rdev,
6278                                           info->attrs[NL80211_ATTR_KEYS],
6279                                           &no_ht);
6280                 if (IS_ERR(connkeys))
6281                         return PTR_ERR(connkeys);
6282
6283                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6284                     no_ht) {
6285                         kfree(connkeys);
6286                         return -EINVAL;
6287                 }
6288         }
6289
6290         ibss.control_port =
6291                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6292
6293         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6294         if (err)
6295                 kfree(connkeys);
6296         return err;
6297 }
6298
6299 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6300 {
6301         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6302         struct net_device *dev = info->user_ptr[1];
6303
6304         if (!rdev->ops->leave_ibss)
6305                 return -EOPNOTSUPP;
6306
6307         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6308                 return -EOPNOTSUPP;
6309
6310         return cfg80211_leave_ibss(rdev, dev, false);
6311 }
6312
6313 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6314 {
6315         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6316         struct net_device *dev = info->user_ptr[1];
6317         int mcast_rate[IEEE80211_NUM_BANDS];
6318         u32 nla_rate;
6319         int err;
6320
6321         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6322             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6323                 return -EOPNOTSUPP;
6324
6325         if (!rdev->ops->set_mcast_rate)
6326                 return -EOPNOTSUPP;
6327
6328         memset(mcast_rate, 0, sizeof(mcast_rate));
6329
6330         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6331                 return -EINVAL;
6332
6333         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6334         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6335                 return -EINVAL;
6336
6337         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6338
6339         return err;
6340 }
6341
6342
6343 #ifdef CONFIG_NL80211_TESTMODE
6344 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6345         .name = "testmode",
6346 };
6347
6348 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6349 {
6350         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6351         int err;
6352
6353         if (!info->attrs[NL80211_ATTR_TESTDATA])
6354                 return -EINVAL;
6355
6356         err = -EOPNOTSUPP;
6357         if (rdev->ops->testmode_cmd) {
6358                 rdev->testmode_info = info;
6359                 err = rdev_testmode_cmd(rdev,
6360                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6361                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6362                 rdev->testmode_info = NULL;
6363         }
6364
6365         return err;
6366 }
6367
6368 static int nl80211_testmode_dump(struct sk_buff *skb,
6369                                  struct netlink_callback *cb)
6370 {
6371         struct cfg80211_registered_device *rdev;
6372         int err;
6373         long phy_idx;
6374         void *data = NULL;
6375         int data_len = 0;
6376
6377         if (cb->args[0]) {
6378                 /*
6379                  * 0 is a valid index, but not valid for args[0],
6380                  * so we need to offset by 1.
6381                  */
6382                 phy_idx = cb->args[0] - 1;
6383         } else {
6384                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6385                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6386                                   nl80211_policy);
6387                 if (err)
6388                         return err;
6389
6390                 mutex_lock(&cfg80211_mutex);
6391                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6392                                                   nl80211_fam.attrbuf);
6393                 if (IS_ERR(rdev)) {
6394                         mutex_unlock(&cfg80211_mutex);
6395                         return PTR_ERR(rdev);
6396                 }
6397                 phy_idx = rdev->wiphy_idx;
6398                 rdev = NULL;
6399                 mutex_unlock(&cfg80211_mutex);
6400
6401                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6402                         cb->args[1] =
6403                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6404         }
6405
6406         if (cb->args[1]) {
6407                 data = nla_data((void *)cb->args[1]);
6408                 data_len = nla_len((void *)cb->args[1]);
6409         }
6410
6411         mutex_lock(&cfg80211_mutex);
6412         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6413         if (!rdev) {
6414                 mutex_unlock(&cfg80211_mutex);
6415                 return -ENOENT;
6416         }
6417         cfg80211_lock_rdev(rdev);
6418         mutex_unlock(&cfg80211_mutex);
6419
6420         if (!rdev->ops->testmode_dump) {
6421                 err = -EOPNOTSUPP;
6422                 goto out_err;
6423         }
6424
6425         while (1) {
6426                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6427                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6428                                            NL80211_CMD_TESTMODE);
6429                 struct nlattr *tmdata;
6430
6431                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6432                         genlmsg_cancel(skb, hdr);
6433                         break;
6434                 }
6435
6436                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6437                 if (!tmdata) {
6438                         genlmsg_cancel(skb, hdr);
6439                         break;
6440                 }
6441                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6442                 nla_nest_end(skb, tmdata);
6443
6444                 if (err == -ENOBUFS || err == -ENOENT) {
6445                         genlmsg_cancel(skb, hdr);
6446                         break;
6447                 } else if (err) {
6448                         genlmsg_cancel(skb, hdr);
6449                         goto out_err;
6450                 }
6451
6452                 genlmsg_end(skb, hdr);
6453         }
6454
6455         err = skb->len;
6456         /* see above */
6457         cb->args[0] = phy_idx + 1;
6458  out_err:
6459         cfg80211_unlock_rdev(rdev);
6460         return err;
6461 }
6462
6463 static struct sk_buff *
6464 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6465                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6466 {
6467         struct sk_buff *skb;
6468         void *hdr;
6469         struct nlattr *data;
6470
6471         skb = nlmsg_new(approxlen + 100, gfp);
6472         if (!skb)
6473                 return NULL;
6474
6475         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6476         if (!hdr) {
6477                 kfree_skb(skb);
6478                 return NULL;
6479         }
6480
6481         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6482                 goto nla_put_failure;
6483         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6484
6485         ((void **)skb->cb)[0] = rdev;
6486         ((void **)skb->cb)[1] = hdr;
6487         ((void **)skb->cb)[2] = data;
6488
6489         return skb;
6490
6491  nla_put_failure:
6492         kfree_skb(skb);
6493         return NULL;
6494 }
6495
6496 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6497                                                   int approxlen)
6498 {
6499         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6500
6501         if (WARN_ON(!rdev->testmode_info))
6502                 return NULL;
6503
6504         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6505                                 rdev->testmode_info->snd_portid,
6506                                 rdev->testmode_info->snd_seq,
6507                                 GFP_KERNEL);
6508 }
6509 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6510
6511 int cfg80211_testmode_reply(struct sk_buff *skb)
6512 {
6513         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6514         void *hdr = ((void **)skb->cb)[1];
6515         struct nlattr *data = ((void **)skb->cb)[2];
6516
6517         if (WARN_ON(!rdev->testmode_info)) {
6518                 kfree_skb(skb);
6519                 return -EINVAL;
6520         }
6521
6522         nla_nest_end(skb, data);
6523         genlmsg_end(skb, hdr);
6524         return genlmsg_reply(skb, rdev->testmode_info);
6525 }
6526 EXPORT_SYMBOL(cfg80211_testmode_reply);
6527
6528 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6529                                                   int approxlen, gfp_t gfp)
6530 {
6531         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6532
6533         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6534 }
6535 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6536
6537 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6538 {
6539         void *hdr = ((void **)skb->cb)[1];
6540         struct nlattr *data = ((void **)skb->cb)[2];
6541
6542         nla_nest_end(skb, data);
6543         genlmsg_end(skb, hdr);
6544         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6545 }
6546 EXPORT_SYMBOL(cfg80211_testmode_event);
6547 #endif
6548
6549 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6550 {
6551         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6552         struct net_device *dev = info->user_ptr[1];
6553         struct cfg80211_connect_params connect;
6554         struct wiphy *wiphy;
6555         struct cfg80211_cached_keys *connkeys = NULL;
6556         int err;
6557
6558         memset(&connect, 0, sizeof(connect));
6559
6560         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6561                 return -EINVAL;
6562
6563         if (!info->attrs[NL80211_ATTR_SSID] ||
6564             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6565                 return -EINVAL;
6566
6567         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6568                 connect.auth_type =
6569                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6570                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6571                                              NL80211_CMD_CONNECT))
6572                         return -EINVAL;
6573         } else
6574                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6575
6576         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6577
6578         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6579                                       NL80211_MAX_NR_CIPHER_SUITES);
6580         if (err)
6581                 return err;
6582
6583         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6584             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6585                 return -EOPNOTSUPP;
6586
6587         wiphy = &rdev->wiphy;
6588
6589         connect.bg_scan_period = -1;
6590         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6591                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6592                 connect.bg_scan_period =
6593                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6594         }
6595
6596         if (info->attrs[NL80211_ATTR_MAC])
6597                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6598         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6599         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6600
6601         if (info->attrs[NL80211_ATTR_IE]) {
6602                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6603                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6604         }
6605
6606         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6607                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6608                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6609                     connect.mfp != NL80211_MFP_NO)
6610                         return -EINVAL;
6611         } else {
6612                 connect.mfp = NL80211_MFP_NO;
6613         }
6614
6615         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6616                 connect.channel =
6617                         ieee80211_get_channel(wiphy,
6618                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6619                 if (!connect.channel ||
6620                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6621                         return -EINVAL;
6622         }
6623
6624         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6625                 connkeys = nl80211_parse_connkeys(rdev,
6626                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6627                 if (IS_ERR(connkeys))
6628                         return PTR_ERR(connkeys);
6629         }
6630
6631         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6632                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6633
6634         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6635                 memcpy(&connect.ht_capa_mask,
6636                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6637                        sizeof(connect.ht_capa_mask));
6638
6639         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6640                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6641                         kfree(connkeys);
6642                         return -EINVAL;
6643                 }
6644                 memcpy(&connect.ht_capa,
6645                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6646                        sizeof(connect.ht_capa));
6647         }
6648
6649         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6650                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6651
6652         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6653                 memcpy(&connect.vht_capa_mask,
6654                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6655                        sizeof(connect.vht_capa_mask));
6656
6657         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6658                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6659                         kfree(connkeys);
6660                         return -EINVAL;
6661                 }
6662                 memcpy(&connect.vht_capa,
6663                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6664                        sizeof(connect.vht_capa));
6665         }
6666
6667         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6668         if (err)
6669                 kfree(connkeys);
6670         return err;
6671 }
6672
6673 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6674 {
6675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6676         struct net_device *dev = info->user_ptr[1];
6677         u16 reason;
6678
6679         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6680                 reason = WLAN_REASON_DEAUTH_LEAVING;
6681         else
6682                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6683
6684         if (reason == 0)
6685                 return -EINVAL;
6686
6687         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6688             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6689                 return -EOPNOTSUPP;
6690
6691         return cfg80211_disconnect(rdev, dev, reason, true);
6692 }
6693
6694 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6695 {
6696         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6697         struct net *net;
6698         int err;
6699         u32 pid;
6700
6701         if (!info->attrs[NL80211_ATTR_PID])
6702                 return -EINVAL;
6703
6704         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6705
6706         net = get_net_ns_by_pid(pid);
6707         if (IS_ERR(net))
6708                 return PTR_ERR(net);
6709
6710         err = 0;
6711
6712         /* check if anything to do */
6713         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6714                 err = cfg80211_switch_netns(rdev, net);
6715
6716         put_net(net);
6717         return err;
6718 }
6719
6720 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6721 {
6722         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6723         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6724                         struct cfg80211_pmksa *pmksa) = NULL;
6725         struct net_device *dev = info->user_ptr[1];
6726         struct cfg80211_pmksa pmksa;
6727
6728         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6729
6730         if (!info->attrs[NL80211_ATTR_MAC])
6731                 return -EINVAL;
6732
6733         if (!info->attrs[NL80211_ATTR_PMKID])
6734                 return -EINVAL;
6735
6736         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6737         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6738
6739         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6740             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6741                 return -EOPNOTSUPP;
6742
6743         switch (info->genlhdr->cmd) {
6744         case NL80211_CMD_SET_PMKSA:
6745                 rdev_ops = rdev->ops->set_pmksa;
6746                 break;
6747         case NL80211_CMD_DEL_PMKSA:
6748                 rdev_ops = rdev->ops->del_pmksa;
6749                 break;
6750         default:
6751                 WARN_ON(1);
6752                 break;
6753         }
6754
6755         if (!rdev_ops)
6756                 return -EOPNOTSUPP;
6757
6758         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6759 }
6760
6761 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6762 {
6763         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6764         struct net_device *dev = info->user_ptr[1];
6765
6766         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6767             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6768                 return -EOPNOTSUPP;
6769
6770         if (!rdev->ops->flush_pmksa)
6771                 return -EOPNOTSUPP;
6772
6773         return rdev_flush_pmksa(rdev, dev);
6774 }
6775
6776 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6777 {
6778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6779         struct net_device *dev = info->user_ptr[1];
6780         u8 action_code, dialog_token;
6781         u16 status_code;
6782         u8 *peer;
6783
6784         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6785             !rdev->ops->tdls_mgmt)
6786                 return -EOPNOTSUPP;
6787
6788         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6789             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6790             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6791             !info->attrs[NL80211_ATTR_IE] ||
6792             !info->attrs[NL80211_ATTR_MAC])
6793                 return -EINVAL;
6794
6795         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6796         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6797         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6798         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6799
6800         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6801                               dialog_token, status_code,
6802                               nla_data(info->attrs[NL80211_ATTR_IE]),
6803                               nla_len(info->attrs[NL80211_ATTR_IE]));
6804 }
6805
6806 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6807 {
6808         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6809         struct net_device *dev = info->user_ptr[1];
6810         enum nl80211_tdls_operation operation;
6811         u8 *peer;
6812
6813         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6814             !rdev->ops->tdls_oper)
6815                 return -EOPNOTSUPP;
6816
6817         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6818             !info->attrs[NL80211_ATTR_MAC])
6819                 return -EINVAL;
6820
6821         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6822         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6823
6824         return rdev_tdls_oper(rdev, dev, peer, operation);
6825 }
6826
6827 static int nl80211_remain_on_channel(struct sk_buff *skb,
6828                                      struct genl_info *info)
6829 {
6830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6831         struct wireless_dev *wdev = info->user_ptr[1];
6832         struct cfg80211_chan_def chandef;
6833         struct sk_buff *msg;
6834         void *hdr;
6835         u64 cookie;
6836         u32 duration;
6837         int err;
6838
6839         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6840             !info->attrs[NL80211_ATTR_DURATION])
6841                 return -EINVAL;
6842
6843         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6844
6845         if (!rdev->ops->remain_on_channel ||
6846             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6847                 return -EOPNOTSUPP;
6848
6849         /*
6850          * We should be on that channel for at least a minimum amount of
6851          * time (10ms) but no longer than the driver supports.
6852          */
6853         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6854             duration > rdev->wiphy.max_remain_on_channel_duration)
6855                 return -EINVAL;
6856
6857         err = nl80211_parse_chandef(rdev, info, &chandef);
6858         if (err)
6859                 return err;
6860
6861         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6862         if (!msg)
6863                 return -ENOMEM;
6864
6865         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6866                              NL80211_CMD_REMAIN_ON_CHANNEL);
6867
6868         if (IS_ERR(hdr)) {
6869                 err = PTR_ERR(hdr);
6870                 goto free_msg;
6871         }
6872
6873         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6874                                      duration, &cookie);
6875
6876         if (err)
6877                 goto free_msg;
6878
6879         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6880                 goto nla_put_failure;
6881
6882         genlmsg_end(msg, hdr);
6883
6884         return genlmsg_reply(msg, info);
6885
6886  nla_put_failure:
6887         err = -ENOBUFS;
6888  free_msg:
6889         nlmsg_free(msg);
6890         return err;
6891 }
6892
6893 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6894                                             struct genl_info *info)
6895 {
6896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6897         struct wireless_dev *wdev = info->user_ptr[1];
6898         u64 cookie;
6899
6900         if (!info->attrs[NL80211_ATTR_COOKIE])
6901                 return -EINVAL;
6902
6903         if (!rdev->ops->cancel_remain_on_channel)
6904                 return -EOPNOTSUPP;
6905
6906         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6907
6908         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6909 }
6910
6911 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6912                            u8 *rates, u8 rates_len)
6913 {
6914         u8 i;
6915         u32 mask = 0;
6916
6917         for (i = 0; i < rates_len; i++) {
6918                 int rate = (rates[i] & 0x7f) * 5;
6919                 int ridx;
6920                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6921                         struct ieee80211_rate *srate =
6922                                 &sband->bitrates[ridx];
6923                         if (rate == srate->bitrate) {
6924                                 mask |= 1 << ridx;
6925                                 break;
6926                         }
6927                 }
6928                 if (ridx == sband->n_bitrates)
6929                         return 0; /* rate not found */
6930         }
6931
6932         return mask;
6933 }
6934
6935 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6936                                u8 *rates, u8 rates_len,
6937                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6938 {
6939         u8 i;
6940
6941         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6942
6943         for (i = 0; i < rates_len; i++) {
6944                 int ridx, rbit;
6945
6946                 ridx = rates[i] / 8;
6947                 rbit = BIT(rates[i] % 8);
6948
6949                 /* check validity */
6950                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6951                         return false;
6952
6953                 /* check availability */
6954                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6955                         mcs[ridx] |= rbit;
6956                 else
6957                         return false;
6958         }
6959
6960         return true;
6961 }
6962
6963 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6964         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6965                                     .len = NL80211_MAX_SUPP_RATES },
6966         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6967                                  .len = NL80211_MAX_SUPP_HT_RATES },
6968 };
6969
6970 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6971                                        struct genl_info *info)
6972 {
6973         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6974         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6975         struct cfg80211_bitrate_mask mask;
6976         int rem, i;
6977         struct net_device *dev = info->user_ptr[1];
6978         struct nlattr *tx_rates;
6979         struct ieee80211_supported_band *sband;
6980
6981         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6982                 return -EINVAL;
6983
6984         if (!rdev->ops->set_bitrate_mask)
6985                 return -EOPNOTSUPP;
6986
6987         memset(&mask, 0, sizeof(mask));
6988         /* Default to all rates enabled */
6989         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6990                 sband = rdev->wiphy.bands[i];
6991                 mask.control[i].legacy =
6992                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6993                 if (sband)
6994                         memcpy(mask.control[i].mcs,
6995                                sband->ht_cap.mcs.rx_mask,
6996                                sizeof(mask.control[i].mcs));
6997                 else
6998                         memset(mask.control[i].mcs, 0,
6999                                sizeof(mask.control[i].mcs));
7000         }
7001
7002         /*
7003          * The nested attribute uses enum nl80211_band as the index. This maps
7004          * directly to the enum ieee80211_band values used in cfg80211.
7005          */
7006         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7007         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7008         {
7009                 enum ieee80211_band band = nla_type(tx_rates);
7010                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7011                         return -EINVAL;
7012                 sband = rdev->wiphy.bands[band];
7013                 if (sband == NULL)
7014                         return -EINVAL;
7015                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7016                           nla_len(tx_rates), nl80211_txattr_policy);
7017                 if (tb[NL80211_TXRATE_LEGACY]) {
7018                         mask.control[band].legacy = rateset_to_mask(
7019                                 sband,
7020                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7021                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7022                         if ((mask.control[band].legacy == 0) &&
7023                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7024                                 return -EINVAL;
7025                 }
7026                 if (tb[NL80211_TXRATE_MCS]) {
7027                         if (!ht_rateset_to_mask(
7028                                         sband,
7029                                         nla_data(tb[NL80211_TXRATE_MCS]),
7030                                         nla_len(tb[NL80211_TXRATE_MCS]),
7031                                         mask.control[band].mcs))
7032                                 return -EINVAL;
7033                 }
7034
7035                 if (mask.control[band].legacy == 0) {
7036                         /* don't allow empty legacy rates if HT
7037                          * is not even supported. */
7038                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7039                                 return -EINVAL;
7040
7041                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7042                                 if (mask.control[band].mcs[i])
7043                                         break;
7044
7045                         /* legacy and mcs rates may not be both empty */
7046                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7047                                 return -EINVAL;
7048                 }
7049         }
7050
7051         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7052 }
7053
7054 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7055 {
7056         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7057         struct wireless_dev *wdev = info->user_ptr[1];
7058         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7059
7060         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7061                 return -EINVAL;
7062
7063         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7064                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7065
7066         switch (wdev->iftype) {
7067         case NL80211_IFTYPE_STATION:
7068         case NL80211_IFTYPE_ADHOC:
7069         case NL80211_IFTYPE_P2P_CLIENT:
7070         case NL80211_IFTYPE_AP:
7071         case NL80211_IFTYPE_AP_VLAN:
7072         case NL80211_IFTYPE_MESH_POINT:
7073         case NL80211_IFTYPE_P2P_GO:
7074         case NL80211_IFTYPE_P2P_DEVICE:
7075                 break;
7076         default:
7077                 return -EOPNOTSUPP;
7078         }
7079
7080         /* not much point in registering if we can't reply */
7081         if (!rdev->ops->mgmt_tx)
7082                 return -EOPNOTSUPP;
7083
7084         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7085                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7086                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7087 }
7088
7089 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7090 {
7091         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7092         struct wireless_dev *wdev = info->user_ptr[1];
7093         struct cfg80211_chan_def chandef;
7094         int err;
7095         void *hdr = NULL;
7096         u64 cookie;
7097         struct sk_buff *msg = NULL;
7098         unsigned int wait = 0;
7099         bool offchan, no_cck, dont_wait_for_ack;
7100
7101         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7102
7103         if (!info->attrs[NL80211_ATTR_FRAME])
7104                 return -EINVAL;
7105
7106         if (!rdev->ops->mgmt_tx)
7107                 return -EOPNOTSUPP;
7108
7109         switch (wdev->iftype) {
7110         case NL80211_IFTYPE_STATION:
7111         case NL80211_IFTYPE_ADHOC:
7112         case NL80211_IFTYPE_P2P_CLIENT:
7113         case NL80211_IFTYPE_AP:
7114         case NL80211_IFTYPE_AP_VLAN:
7115         case NL80211_IFTYPE_MESH_POINT:
7116         case NL80211_IFTYPE_P2P_GO:
7117         case NL80211_IFTYPE_P2P_DEVICE:
7118                 break;
7119         default:
7120                 return -EOPNOTSUPP;
7121         }
7122
7123         if (info->attrs[NL80211_ATTR_DURATION]) {
7124                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7125                         return -EINVAL;
7126                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7127
7128                 /*
7129                  * We should wait on the channel for at least a minimum amount
7130                  * of time (10ms) but no longer than the driver supports.
7131                  */
7132                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7133                     wait > rdev->wiphy.max_remain_on_channel_duration)
7134                         return -EINVAL;
7135
7136         }
7137
7138         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7139
7140         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7141                 return -EINVAL;
7142
7143         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7144
7145         err = nl80211_parse_chandef(rdev, info, &chandef);
7146         if (err)
7147                 return err;
7148
7149         if (!dont_wait_for_ack) {
7150                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7151                 if (!msg)
7152                         return -ENOMEM;
7153
7154                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7155                                      NL80211_CMD_FRAME);
7156
7157                 if (IS_ERR(hdr)) {
7158                         err = PTR_ERR(hdr);
7159                         goto free_msg;
7160                 }
7161         }
7162
7163         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7164                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7165                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7166                                     no_cck, dont_wait_for_ack, &cookie);
7167         if (err)
7168                 goto free_msg;
7169
7170         if (msg) {
7171                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7172                         goto nla_put_failure;
7173
7174                 genlmsg_end(msg, hdr);
7175                 return genlmsg_reply(msg, info);
7176         }
7177
7178         return 0;
7179
7180  nla_put_failure:
7181         err = -ENOBUFS;
7182  free_msg:
7183         nlmsg_free(msg);
7184         return err;
7185 }
7186
7187 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7188 {
7189         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7190         struct wireless_dev *wdev = info->user_ptr[1];
7191         u64 cookie;
7192
7193         if (!info->attrs[NL80211_ATTR_COOKIE])
7194                 return -EINVAL;
7195
7196         if (!rdev->ops->mgmt_tx_cancel_wait)
7197                 return -EOPNOTSUPP;
7198
7199         switch (wdev->iftype) {
7200         case NL80211_IFTYPE_STATION:
7201         case NL80211_IFTYPE_ADHOC:
7202         case NL80211_IFTYPE_P2P_CLIENT:
7203         case NL80211_IFTYPE_AP:
7204         case NL80211_IFTYPE_AP_VLAN:
7205         case NL80211_IFTYPE_P2P_GO:
7206         case NL80211_IFTYPE_P2P_DEVICE:
7207                 break;
7208         default:
7209                 return -EOPNOTSUPP;
7210         }
7211
7212         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7213
7214         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7215 }
7216
7217 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7218 {
7219         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7220         struct wireless_dev *wdev;
7221         struct net_device *dev = info->user_ptr[1];
7222         u8 ps_state;
7223         bool state;
7224         int err;
7225
7226         if (!info->attrs[NL80211_ATTR_PS_STATE])
7227                 return -EINVAL;
7228
7229         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7230
7231         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7232                 return -EINVAL;
7233
7234         wdev = dev->ieee80211_ptr;
7235
7236         if (!rdev->ops->set_power_mgmt)
7237                 return -EOPNOTSUPP;
7238
7239         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7240
7241         if (state == wdev->ps)
7242                 return 0;
7243
7244         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7245         if (!err)
7246                 wdev->ps = state;
7247         return err;
7248 }
7249
7250 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7251 {
7252         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7253         enum nl80211_ps_state ps_state;
7254         struct wireless_dev *wdev;
7255         struct net_device *dev = info->user_ptr[1];
7256         struct sk_buff *msg;
7257         void *hdr;
7258         int err;
7259
7260         wdev = dev->ieee80211_ptr;
7261
7262         if (!rdev->ops->set_power_mgmt)
7263                 return -EOPNOTSUPP;
7264
7265         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7266         if (!msg)
7267                 return -ENOMEM;
7268
7269         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7270                              NL80211_CMD_GET_POWER_SAVE);
7271         if (!hdr) {
7272                 err = -ENOBUFS;
7273                 goto free_msg;
7274         }
7275
7276         if (wdev->ps)
7277                 ps_state = NL80211_PS_ENABLED;
7278         else
7279                 ps_state = NL80211_PS_DISABLED;
7280
7281         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7282                 goto nla_put_failure;
7283
7284         genlmsg_end(msg, hdr);
7285         return genlmsg_reply(msg, info);
7286
7287  nla_put_failure:
7288         err = -ENOBUFS;
7289  free_msg:
7290         nlmsg_free(msg);
7291         return err;
7292 }
7293
7294 static struct nla_policy
7295 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7296         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7297         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7298         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7299         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7300         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7301         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7302 };
7303
7304 static int nl80211_set_cqm_txe(struct genl_info *info,
7305                                u32 rate, u32 pkts, u32 intvl)
7306 {
7307         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7308         struct wireless_dev *wdev;
7309         struct net_device *dev = info->user_ptr[1];
7310
7311         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7312                 return -EINVAL;
7313
7314         wdev = dev->ieee80211_ptr;
7315
7316         if (!rdev->ops->set_cqm_txe_config)
7317                 return -EOPNOTSUPP;
7318
7319         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7320             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7321                 return -EOPNOTSUPP;
7322
7323         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7324 }
7325
7326 static int nl80211_set_cqm_rssi(struct genl_info *info,
7327                                 s32 threshold, u32 hysteresis)
7328 {
7329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7330         struct wireless_dev *wdev;
7331         struct net_device *dev = info->user_ptr[1];
7332
7333         if (threshold > 0)
7334                 return -EINVAL;
7335
7336         wdev = dev->ieee80211_ptr;
7337
7338         if (!rdev->ops->set_cqm_rssi_config)
7339                 return -EOPNOTSUPP;
7340
7341         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7342             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7343                 return -EOPNOTSUPP;
7344
7345         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7346 }
7347
7348 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7349 {
7350         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7351         struct nlattr *cqm;
7352         int err;
7353
7354         cqm = info->attrs[NL80211_ATTR_CQM];
7355         if (!cqm) {
7356                 err = -EINVAL;
7357                 goto out;
7358         }
7359
7360         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7361                                nl80211_attr_cqm_policy);
7362         if (err)
7363                 goto out;
7364
7365         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7366             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7367                 s32 threshold;
7368                 u32 hysteresis;
7369                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7370                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7371                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7372         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7373                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7374                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7375                 u32 rate, pkts, intvl;
7376                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7377                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7378                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7379                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7380         } else
7381                 err = -EINVAL;
7382
7383 out:
7384         return err;
7385 }
7386
7387 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7388 {
7389         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7390         struct net_device *dev = info->user_ptr[1];
7391         struct mesh_config cfg;
7392         struct mesh_setup setup;
7393         int err;
7394
7395         /* start with default */
7396         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7397         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7398
7399         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7400                 /* and parse parameters if given */
7401                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7402                 if (err)
7403                         return err;
7404         }
7405
7406         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7407             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7408                 return -EINVAL;
7409
7410         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7411         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7412
7413         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7414             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7415                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7416                         return -EINVAL;
7417
7418         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7419                 setup.beacon_interval =
7420                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7421                 if (setup.beacon_interval < 10 ||
7422                     setup.beacon_interval > 10000)
7423                         return -EINVAL;
7424         }
7425
7426         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7427                 setup.dtim_period =
7428                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7429                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7430                         return -EINVAL;
7431         }
7432
7433         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7434                 /* parse additional setup parameters if given */
7435                 err = nl80211_parse_mesh_setup(info, &setup);
7436                 if (err)
7437                         return err;
7438         }
7439
7440         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7441                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7442                 if (err)
7443                         return err;
7444         } else {
7445                 /* cfg80211_join_mesh() will sort it out */
7446                 setup.chandef.chan = NULL;
7447         }
7448
7449         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7450 }
7451
7452 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7453 {
7454         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7455         struct net_device *dev = info->user_ptr[1];
7456
7457         return cfg80211_leave_mesh(rdev, dev);
7458 }
7459
7460 #ifdef CONFIG_PM
7461 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7462                                         struct cfg80211_registered_device *rdev)
7463 {
7464         struct nlattr *nl_pats, *nl_pat;
7465         int i, pat_len;
7466
7467         if (!rdev->wowlan->n_patterns)
7468                 return 0;
7469
7470         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7471         if (!nl_pats)
7472                 return -ENOBUFS;
7473
7474         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7475                 nl_pat = nla_nest_start(msg, i + 1);
7476                 if (!nl_pat)
7477                         return -ENOBUFS;
7478                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7479                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7480                             DIV_ROUND_UP(pat_len, 8),
7481                             rdev->wowlan->patterns[i].mask) ||
7482                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7483                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7484                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7485                                 rdev->wowlan->patterns[i].pkt_offset))
7486                         return -ENOBUFS;
7487                 nla_nest_end(msg, nl_pat);
7488         }
7489         nla_nest_end(msg, nl_pats);
7490
7491         return 0;
7492 }
7493
7494 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7495                                    struct cfg80211_wowlan_tcp *tcp)
7496 {
7497         struct nlattr *nl_tcp;
7498
7499         if (!tcp)
7500                 return 0;
7501
7502         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7503         if (!nl_tcp)
7504                 return -ENOBUFS;
7505
7506         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7507             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7508             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7509             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7510             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7511             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7512                     tcp->payload_len, tcp->payload) ||
7513             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7514                         tcp->data_interval) ||
7515             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7516                     tcp->wake_len, tcp->wake_data) ||
7517             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7518                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7519                 return -ENOBUFS;
7520
7521         if (tcp->payload_seq.len &&
7522             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7523                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7524                 return -ENOBUFS;
7525
7526         if (tcp->payload_tok.len &&
7527             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7528                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7529                     &tcp->payload_tok))
7530                 return -ENOBUFS;
7531
7532         return 0;
7533 }
7534
7535 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7536 {
7537         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7538         struct sk_buff *msg;
7539         void *hdr;
7540         u32 size = NLMSG_DEFAULT_SIZE;
7541
7542         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7543             !rdev->wiphy.wowlan.tcp)
7544                 return -EOPNOTSUPP;
7545
7546         if (rdev->wowlan && rdev->wowlan->tcp) {
7547                 /* adjust size to have room for all the data */
7548                 size += rdev->wowlan->tcp->tokens_size +
7549                         rdev->wowlan->tcp->payload_len +
7550                         rdev->wowlan->tcp->wake_len +
7551                         rdev->wowlan->tcp->wake_len / 8;
7552         }
7553
7554         msg = nlmsg_new(size, GFP_KERNEL);
7555         if (!msg)
7556                 return -ENOMEM;
7557
7558         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7559                              NL80211_CMD_GET_WOWLAN);
7560         if (!hdr)
7561                 goto nla_put_failure;
7562
7563         if (rdev->wowlan) {
7564                 struct nlattr *nl_wowlan;
7565
7566                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7567                 if (!nl_wowlan)
7568                         goto nla_put_failure;
7569
7570                 if ((rdev->wowlan->any &&
7571                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7572                     (rdev->wowlan->disconnect &&
7573                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7574                     (rdev->wowlan->magic_pkt &&
7575                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7576                     (rdev->wowlan->gtk_rekey_failure &&
7577                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7578                     (rdev->wowlan->eap_identity_req &&
7579                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7580                     (rdev->wowlan->four_way_handshake &&
7581                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7582                     (rdev->wowlan->rfkill_release &&
7583                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7584                         goto nla_put_failure;
7585
7586                 if (nl80211_send_wowlan_patterns(msg, rdev))
7587                         goto nla_put_failure;
7588
7589                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7590                         goto nla_put_failure;
7591
7592                 nla_nest_end(msg, nl_wowlan);
7593         }
7594
7595         genlmsg_end(msg, hdr);
7596         return genlmsg_reply(msg, info);
7597
7598 nla_put_failure:
7599         nlmsg_free(msg);
7600         return -ENOBUFS;
7601 }
7602
7603 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7604                                     struct nlattr *attr,
7605                                     struct cfg80211_wowlan *trig)
7606 {
7607         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7608         struct cfg80211_wowlan_tcp *cfg;
7609         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7610         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7611         u32 size;
7612         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7613         int err, port;
7614
7615         if (!rdev->wiphy.wowlan.tcp)
7616                 return -EINVAL;
7617
7618         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7619                         nla_data(attr), nla_len(attr),
7620                         nl80211_wowlan_tcp_policy);
7621         if (err)
7622                 return err;
7623
7624         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7625             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7626             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7627             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7628             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7629             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7630             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7631             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7632                 return -EINVAL;
7633
7634         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7635         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7636                 return -EINVAL;
7637
7638         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7639                         rdev->wiphy.wowlan.tcp->data_interval_max ||
7640             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7641                 return -EINVAL;
7642
7643         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7644         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7645                 return -EINVAL;
7646
7647         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7648         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7649                 return -EINVAL;
7650
7651         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7652                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7653
7654                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7655                 tokens_size = tokln - sizeof(*tok);
7656
7657                 if (!tok->len || tokens_size % tok->len)
7658                         return -EINVAL;
7659                 if (!rdev->wiphy.wowlan.tcp->tok)
7660                         return -EINVAL;
7661                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7662                         return -EINVAL;
7663                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7664                         return -EINVAL;
7665                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7666                         return -EINVAL;
7667                 if (tok->offset + tok->len > data_size)
7668                         return -EINVAL;
7669         }
7670
7671         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7672                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7673                 if (!rdev->wiphy.wowlan.tcp->seq)
7674                         return -EINVAL;
7675                 if (seq->len == 0 || seq->len > 4)
7676                         return -EINVAL;
7677                 if (seq->len + seq->offset > data_size)
7678                         return -EINVAL;
7679         }
7680
7681         size = sizeof(*cfg);
7682         size += data_size;
7683         size += wake_size + wake_mask_size;
7684         size += tokens_size;
7685
7686         cfg = kzalloc(size, GFP_KERNEL);
7687         if (!cfg)
7688                 return -ENOMEM;
7689         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7690         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7691         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7692                ETH_ALEN);
7693         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7694                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7695         else
7696                 port = 0;
7697 #ifdef CONFIG_INET
7698         /* allocate a socket and port for it and use it */
7699         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7700                             IPPROTO_TCP, &cfg->sock, 1);
7701         if (err) {
7702                 kfree(cfg);
7703                 return err;
7704         }
7705         if (inet_csk_get_port(cfg->sock->sk, port)) {
7706                 sock_release(cfg->sock);
7707                 kfree(cfg);
7708                 return -EADDRINUSE;
7709         }
7710         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7711 #else
7712         if (!port) {
7713                 kfree(cfg);
7714                 return -EINVAL;
7715         }
7716         cfg->src_port = port;
7717 #endif
7718
7719         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7720         cfg->payload_len = data_size;
7721         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7722         memcpy((void *)cfg->payload,
7723                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7724                data_size);
7725         if (seq)
7726                 cfg->payload_seq = *seq;
7727         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7728         cfg->wake_len = wake_size;
7729         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7730         memcpy((void *)cfg->wake_data,
7731                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7732                wake_size);
7733         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7734                          data_size + wake_size;
7735         memcpy((void *)cfg->wake_mask,
7736                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7737                wake_mask_size);
7738         if (tok) {
7739                 cfg->tokens_size = tokens_size;
7740                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7741         }
7742
7743         trig->tcp = cfg;
7744
7745         return 0;
7746 }
7747
7748 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7749 {
7750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7751         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7752         struct cfg80211_wowlan new_triggers = {};
7753         struct cfg80211_wowlan *ntrig;
7754         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7755         int err, i;
7756         bool prev_enabled = rdev->wowlan;
7757
7758         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7759             !rdev->wiphy.wowlan.tcp)
7760                 return -EOPNOTSUPP;
7761
7762         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7763                 cfg80211_rdev_free_wowlan(rdev);
7764                 rdev->wowlan = NULL;
7765                 goto set_wakeup;
7766         }
7767
7768         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7769                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7770                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7771                         nl80211_wowlan_policy);
7772         if (err)
7773                 return err;
7774
7775         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7776                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7777                         return -EINVAL;
7778                 new_triggers.any = true;
7779         }
7780
7781         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7782                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7783                         return -EINVAL;
7784                 new_triggers.disconnect = true;
7785         }
7786
7787         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7788                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7789                         return -EINVAL;
7790                 new_triggers.magic_pkt = true;
7791         }
7792
7793         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7794                 return -EINVAL;
7795
7796         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7797                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7798                         return -EINVAL;
7799                 new_triggers.gtk_rekey_failure = true;
7800         }
7801
7802         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7803                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7804                         return -EINVAL;
7805                 new_triggers.eap_identity_req = true;
7806         }
7807
7808         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7809                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7810                         return -EINVAL;
7811                 new_triggers.four_way_handshake = true;
7812         }
7813
7814         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7815                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7816                         return -EINVAL;
7817                 new_triggers.rfkill_release = true;
7818         }
7819
7820         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7821                 struct nlattr *pat;
7822                 int n_patterns = 0;
7823                 int rem, pat_len, mask_len, pkt_offset;
7824                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7825
7826                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7827                                     rem)
7828                         n_patterns++;
7829                 if (n_patterns > wowlan->n_patterns)
7830                         return -EINVAL;
7831
7832                 new_triggers.patterns = kcalloc(n_patterns,
7833                                                 sizeof(new_triggers.patterns[0]),
7834                                                 GFP_KERNEL);
7835                 if (!new_triggers.patterns)
7836                         return -ENOMEM;
7837
7838                 new_triggers.n_patterns = n_patterns;
7839                 i = 0;
7840
7841                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7842                                     rem) {
7843                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7844                                   nla_data(pat), nla_len(pat), NULL);
7845                         err = -EINVAL;
7846                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7847                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7848                                 goto error;
7849                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7850                         mask_len = DIV_ROUND_UP(pat_len, 8);
7851                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7852                             mask_len)
7853                                 goto error;
7854                         if (pat_len > wowlan->pattern_max_len ||
7855                             pat_len < wowlan->pattern_min_len)
7856                                 goto error;
7857
7858                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7859                                 pkt_offset = 0;
7860                         else
7861                                 pkt_offset = nla_get_u32(
7862                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7863                         if (pkt_offset > wowlan->max_pkt_offset)
7864                                 goto error;
7865                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7866
7867                         new_triggers.patterns[i].mask =
7868                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7869                         if (!new_triggers.patterns[i].mask) {
7870                                 err = -ENOMEM;
7871                                 goto error;
7872                         }
7873                         new_triggers.patterns[i].pattern =
7874                                 new_triggers.patterns[i].mask + mask_len;
7875                         memcpy(new_triggers.patterns[i].mask,
7876                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7877                                mask_len);
7878                         new_triggers.patterns[i].pattern_len = pat_len;
7879                         memcpy(new_triggers.patterns[i].pattern,
7880                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7881                                pat_len);
7882                         i++;
7883                 }
7884         }
7885
7886         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7887                 err = nl80211_parse_wowlan_tcp(
7888                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7889                         &new_triggers);
7890                 if (err)
7891                         goto error;
7892         }
7893
7894         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7895         if (!ntrig) {
7896                 err = -ENOMEM;
7897                 goto error;
7898         }
7899         cfg80211_rdev_free_wowlan(rdev);
7900         rdev->wowlan = ntrig;
7901
7902  set_wakeup:
7903         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7904                 rdev_set_wakeup(rdev, rdev->wowlan);
7905
7906         return 0;
7907  error:
7908         for (i = 0; i < new_triggers.n_patterns; i++)
7909                 kfree(new_triggers.patterns[i].mask);
7910         kfree(new_triggers.patterns);
7911         if (new_triggers.tcp && new_triggers.tcp->sock)
7912                 sock_release(new_triggers.tcp->sock);
7913         kfree(new_triggers.tcp);
7914         return err;
7915 }
7916 #endif
7917
7918 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7919 {
7920         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7921         struct net_device *dev = info->user_ptr[1];
7922         struct wireless_dev *wdev = dev->ieee80211_ptr;
7923         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7924         struct cfg80211_gtk_rekey_data rekey_data;
7925         int err;
7926
7927         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7928                 return -EINVAL;
7929
7930         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7931                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7932                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7933                         nl80211_rekey_policy);
7934         if (err)
7935                 return err;
7936
7937         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7938                 return -ERANGE;
7939         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7940                 return -ERANGE;
7941         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7942                 return -ERANGE;
7943
7944         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7945                NL80211_KEK_LEN);
7946         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7947                NL80211_KCK_LEN);
7948         memcpy(rekey_data.replay_ctr,
7949                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7950                NL80211_REPLAY_CTR_LEN);
7951
7952         wdev_lock(wdev);
7953         if (!wdev->current_bss) {
7954                 err = -ENOTCONN;
7955                 goto out;
7956         }
7957
7958         if (!rdev->ops->set_rekey_data) {
7959                 err = -EOPNOTSUPP;
7960                 goto out;
7961         }
7962
7963         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7964  out:
7965         wdev_unlock(wdev);
7966         return err;
7967 }
7968
7969 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
7970                                              struct genl_info *info)
7971 {
7972         struct net_device *dev = info->user_ptr[1];
7973         struct wireless_dev *wdev = dev->ieee80211_ptr;
7974
7975         if (wdev->iftype != NL80211_IFTYPE_AP &&
7976             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7977                 return -EINVAL;
7978
7979         if (wdev->ap_unexpected_nlportid)
7980                 return -EBUSY;
7981
7982         wdev->ap_unexpected_nlportid = info->snd_portid;
7983         return 0;
7984 }
7985
7986 static int nl80211_probe_client(struct sk_buff *skb,
7987                                 struct genl_info *info)
7988 {
7989         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7990         struct net_device *dev = info->user_ptr[1];
7991         struct wireless_dev *wdev = dev->ieee80211_ptr;
7992         struct sk_buff *msg;
7993         void *hdr;
7994         const u8 *addr;
7995         u64 cookie;
7996         int err;
7997
7998         if (wdev->iftype != NL80211_IFTYPE_AP &&
7999             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8000                 return -EOPNOTSUPP;
8001
8002         if (!info->attrs[NL80211_ATTR_MAC])
8003                 return -EINVAL;
8004
8005         if (!rdev->ops->probe_client)
8006                 return -EOPNOTSUPP;
8007
8008         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8009         if (!msg)
8010                 return -ENOMEM;
8011
8012         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8013                              NL80211_CMD_PROBE_CLIENT);
8014
8015         if (IS_ERR(hdr)) {
8016                 err = PTR_ERR(hdr);
8017                 goto free_msg;
8018         }
8019
8020         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8021
8022         err = rdev_probe_client(rdev, dev, addr, &cookie);
8023         if (err)
8024                 goto free_msg;
8025
8026         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8027                 goto nla_put_failure;
8028
8029         genlmsg_end(msg, hdr);
8030
8031         return genlmsg_reply(msg, info);
8032
8033  nla_put_failure:
8034         err = -ENOBUFS;
8035  free_msg:
8036         nlmsg_free(msg);
8037         return err;
8038 }
8039
8040 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8041 {
8042         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8043         struct cfg80211_beacon_registration *reg, *nreg;
8044         int rv;
8045
8046         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8047                 return -EOPNOTSUPP;
8048
8049         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8050         if (!nreg)
8051                 return -ENOMEM;
8052
8053         /* First, check if already registered. */
8054         spin_lock_bh(&rdev->beacon_registrations_lock);
8055         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8056                 if (reg->nlportid == info->snd_portid) {
8057                         rv = -EALREADY;
8058                         goto out_err;
8059                 }
8060         }
8061         /* Add it to the list */
8062         nreg->nlportid = info->snd_portid;
8063         list_add(&nreg->list, &rdev->beacon_registrations);
8064
8065         spin_unlock_bh(&rdev->beacon_registrations_lock);
8066
8067         return 0;
8068 out_err:
8069         spin_unlock_bh(&rdev->beacon_registrations_lock);
8070         kfree(nreg);
8071         return rv;
8072 }
8073
8074 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8075 {
8076         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8077         struct wireless_dev *wdev = info->user_ptr[1];
8078         int err;
8079
8080         if (!rdev->ops->start_p2p_device)
8081                 return -EOPNOTSUPP;
8082
8083         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8084                 return -EOPNOTSUPP;
8085
8086         if (wdev->p2p_started)
8087                 return 0;
8088
8089         mutex_lock(&rdev->devlist_mtx);
8090         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8091         mutex_unlock(&rdev->devlist_mtx);
8092         if (err)
8093                 return err;
8094
8095         err = rdev_start_p2p_device(rdev, wdev);
8096         if (err)
8097                 return err;
8098
8099         wdev->p2p_started = true;
8100         mutex_lock(&rdev->devlist_mtx);
8101         rdev->opencount++;
8102         mutex_unlock(&rdev->devlist_mtx);
8103
8104         return 0;
8105 }
8106
8107 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8108 {
8109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8110         struct wireless_dev *wdev = info->user_ptr[1];
8111
8112         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8113                 return -EOPNOTSUPP;
8114
8115         if (!rdev->ops->stop_p2p_device)
8116                 return -EOPNOTSUPP;
8117
8118         if (!wdev->p2p_started)
8119                 return 0;
8120
8121         rdev_stop_p2p_device(rdev, wdev);
8122         wdev->p2p_started = false;
8123
8124         mutex_lock(&rdev->devlist_mtx);
8125         rdev->opencount--;
8126         mutex_unlock(&rdev->devlist_mtx);
8127
8128         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
8129                 rdev->scan_req->aborted = true;
8130                 ___cfg80211_scan_done(rdev, true);
8131         }
8132
8133         return 0;
8134 }
8135
8136 static int nl80211_get_protocol_features(struct sk_buff *skb,
8137                                          struct genl_info *info)
8138 {
8139         void *hdr;
8140         struct sk_buff *msg;
8141
8142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8143         if (!msg)
8144                 return -ENOMEM;
8145
8146         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8147                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8148         if (!hdr)
8149                 goto nla_put_failure;
8150
8151         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8152                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8153                 goto nla_put_failure;
8154
8155         genlmsg_end(msg, hdr);
8156         return genlmsg_reply(msg, info);
8157
8158  nla_put_failure:
8159         kfree_skb(msg);
8160         return -ENOBUFS;
8161 }
8162
8163 #define NL80211_FLAG_NEED_WIPHY         0x01
8164 #define NL80211_FLAG_NEED_NETDEV        0x02
8165 #define NL80211_FLAG_NEED_RTNL          0x04
8166 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8167 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8168                                          NL80211_FLAG_CHECK_NETDEV_UP)
8169 #define NL80211_FLAG_NEED_WDEV          0x10
8170 /* If a netdev is associated, it must be UP, P2P must be started */
8171 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8172                                          NL80211_FLAG_CHECK_NETDEV_UP)
8173
8174 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8175                             struct genl_info *info)
8176 {
8177         struct cfg80211_registered_device *rdev;
8178         struct wireless_dev *wdev;
8179         struct net_device *dev;
8180         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8181
8182         if (rtnl)
8183                 rtnl_lock();
8184
8185         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8186                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8187                 if (IS_ERR(rdev)) {
8188                         if (rtnl)
8189                                 rtnl_unlock();
8190                         return PTR_ERR(rdev);
8191                 }
8192                 info->user_ptr[0] = rdev;
8193         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8194                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8195                 mutex_lock(&cfg80211_mutex);
8196                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8197                                                   info->attrs);
8198                 if (IS_ERR(wdev)) {
8199                         mutex_unlock(&cfg80211_mutex);
8200                         if (rtnl)
8201                                 rtnl_unlock();
8202                         return PTR_ERR(wdev);
8203                 }
8204
8205                 dev = wdev->netdev;
8206                 rdev = wiphy_to_dev(wdev->wiphy);
8207
8208                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8209                         if (!dev) {
8210                                 mutex_unlock(&cfg80211_mutex);
8211                                 if (rtnl)
8212                                         rtnl_unlock();
8213                                 return -EINVAL;
8214                         }
8215
8216                         info->user_ptr[1] = dev;
8217                 } else {
8218                         info->user_ptr[1] = wdev;
8219                 }
8220
8221                 if (dev) {
8222                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8223                             !netif_running(dev)) {
8224                                 mutex_unlock(&cfg80211_mutex);
8225                                 if (rtnl)
8226                                         rtnl_unlock();
8227                                 return -ENETDOWN;
8228                         }
8229
8230                         dev_hold(dev);
8231                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8232                         if (!wdev->p2p_started) {
8233                                 mutex_unlock(&cfg80211_mutex);
8234                                 if (rtnl)
8235                                         rtnl_unlock();
8236                                 return -ENETDOWN;
8237                         }
8238                 }
8239
8240                 cfg80211_lock_rdev(rdev);
8241
8242                 mutex_unlock(&cfg80211_mutex);
8243
8244                 info->user_ptr[0] = rdev;
8245         }
8246
8247         return 0;
8248 }
8249
8250 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8251                               struct genl_info *info)
8252 {
8253         if (info->user_ptr[0])
8254                 cfg80211_unlock_rdev(info->user_ptr[0]);
8255         if (info->user_ptr[1]) {
8256                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8257                         struct wireless_dev *wdev = info->user_ptr[1];
8258
8259                         if (wdev->netdev)
8260                                 dev_put(wdev->netdev);
8261                 } else {
8262                         dev_put(info->user_ptr[1]);
8263                 }
8264         }
8265         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8266                 rtnl_unlock();
8267 }
8268
8269 static struct genl_ops nl80211_ops[] = {
8270         {
8271                 .cmd = NL80211_CMD_GET_WIPHY,
8272                 .doit = nl80211_get_wiphy,
8273                 .dumpit = nl80211_dump_wiphy,
8274                 .policy = nl80211_policy,
8275                 /* can be retrieved by unprivileged users */
8276                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
8277         },
8278         {
8279                 .cmd = NL80211_CMD_SET_WIPHY,
8280                 .doit = nl80211_set_wiphy,
8281                 .policy = nl80211_policy,
8282                 .flags = GENL_ADMIN_PERM,
8283                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8284         },
8285         {
8286                 .cmd = NL80211_CMD_GET_INTERFACE,
8287                 .doit = nl80211_get_interface,
8288                 .dumpit = nl80211_dump_interface,
8289                 .policy = nl80211_policy,
8290                 /* can be retrieved by unprivileged users */
8291                 .internal_flags = NL80211_FLAG_NEED_WDEV,
8292         },
8293         {
8294                 .cmd = NL80211_CMD_SET_INTERFACE,
8295                 .doit = nl80211_set_interface,
8296                 .policy = nl80211_policy,
8297                 .flags = GENL_ADMIN_PERM,
8298                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8299                                   NL80211_FLAG_NEED_RTNL,
8300         },
8301         {
8302                 .cmd = NL80211_CMD_NEW_INTERFACE,
8303                 .doit = nl80211_new_interface,
8304                 .policy = nl80211_policy,
8305                 .flags = GENL_ADMIN_PERM,
8306                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8307                                   NL80211_FLAG_NEED_RTNL,
8308         },
8309         {
8310                 .cmd = NL80211_CMD_DEL_INTERFACE,
8311                 .doit = nl80211_del_interface,
8312                 .policy = nl80211_policy,
8313                 .flags = GENL_ADMIN_PERM,
8314                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8315                                   NL80211_FLAG_NEED_RTNL,
8316         },
8317         {
8318                 .cmd = NL80211_CMD_GET_KEY,
8319                 .doit = nl80211_get_key,
8320                 .policy = nl80211_policy,
8321                 .flags = GENL_ADMIN_PERM,
8322                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8323                                   NL80211_FLAG_NEED_RTNL,
8324         },
8325         {
8326                 .cmd = NL80211_CMD_SET_KEY,
8327                 .doit = nl80211_set_key,
8328                 .policy = nl80211_policy,
8329                 .flags = GENL_ADMIN_PERM,
8330                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8331                                   NL80211_FLAG_NEED_RTNL,
8332         },
8333         {
8334                 .cmd = NL80211_CMD_NEW_KEY,
8335                 .doit = nl80211_new_key,
8336                 .policy = nl80211_policy,
8337                 .flags = GENL_ADMIN_PERM,
8338                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8339                                   NL80211_FLAG_NEED_RTNL,
8340         },
8341         {
8342                 .cmd = NL80211_CMD_DEL_KEY,
8343                 .doit = nl80211_del_key,
8344                 .policy = nl80211_policy,
8345                 .flags = GENL_ADMIN_PERM,
8346                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8347                                   NL80211_FLAG_NEED_RTNL,
8348         },
8349         {
8350                 .cmd = NL80211_CMD_SET_BEACON,
8351                 .policy = nl80211_policy,
8352                 .flags = GENL_ADMIN_PERM,
8353                 .doit = nl80211_set_beacon,
8354                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8355                                   NL80211_FLAG_NEED_RTNL,
8356         },
8357         {
8358                 .cmd = NL80211_CMD_START_AP,
8359                 .policy = nl80211_policy,
8360                 .flags = GENL_ADMIN_PERM,
8361                 .doit = nl80211_start_ap,
8362                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8363                                   NL80211_FLAG_NEED_RTNL,
8364         },
8365         {
8366                 .cmd = NL80211_CMD_STOP_AP,
8367                 .policy = nl80211_policy,
8368                 .flags = GENL_ADMIN_PERM,
8369                 .doit = nl80211_stop_ap,
8370                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8371                                   NL80211_FLAG_NEED_RTNL,
8372         },
8373         {
8374                 .cmd = NL80211_CMD_GET_STATION,
8375                 .doit = nl80211_get_station,
8376                 .dumpit = nl80211_dump_station,
8377                 .policy = nl80211_policy,
8378                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8379                                   NL80211_FLAG_NEED_RTNL,
8380         },
8381         {
8382                 .cmd = NL80211_CMD_SET_STATION,
8383                 .doit = nl80211_set_station,
8384                 .policy = nl80211_policy,
8385                 .flags = GENL_ADMIN_PERM,
8386                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8387                                   NL80211_FLAG_NEED_RTNL,
8388         },
8389         {
8390                 .cmd = NL80211_CMD_NEW_STATION,
8391                 .doit = nl80211_new_station,
8392                 .policy = nl80211_policy,
8393                 .flags = GENL_ADMIN_PERM,
8394                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8395                                   NL80211_FLAG_NEED_RTNL,
8396         },
8397         {
8398                 .cmd = NL80211_CMD_DEL_STATION,
8399                 .doit = nl80211_del_station,
8400                 .policy = nl80211_policy,
8401                 .flags = GENL_ADMIN_PERM,
8402                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8403                                   NL80211_FLAG_NEED_RTNL,
8404         },
8405         {
8406                 .cmd = NL80211_CMD_GET_MPATH,
8407                 .doit = nl80211_get_mpath,
8408                 .dumpit = nl80211_dump_mpath,
8409                 .policy = nl80211_policy,
8410                 .flags = GENL_ADMIN_PERM,
8411                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8412                                   NL80211_FLAG_NEED_RTNL,
8413         },
8414         {
8415                 .cmd = NL80211_CMD_SET_MPATH,
8416                 .doit = nl80211_set_mpath,
8417                 .policy = nl80211_policy,
8418                 .flags = GENL_ADMIN_PERM,
8419                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8420                                   NL80211_FLAG_NEED_RTNL,
8421         },
8422         {
8423                 .cmd = NL80211_CMD_NEW_MPATH,
8424                 .doit = nl80211_new_mpath,
8425                 .policy = nl80211_policy,
8426                 .flags = GENL_ADMIN_PERM,
8427                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8428                                   NL80211_FLAG_NEED_RTNL,
8429         },
8430         {
8431                 .cmd = NL80211_CMD_DEL_MPATH,
8432                 .doit = nl80211_del_mpath,
8433                 .policy = nl80211_policy,
8434                 .flags = GENL_ADMIN_PERM,
8435                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8436                                   NL80211_FLAG_NEED_RTNL,
8437         },
8438         {
8439                 .cmd = NL80211_CMD_SET_BSS,
8440                 .doit = nl80211_set_bss,
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                 .cmd = NL80211_CMD_GET_REG,
8448                 .doit = nl80211_get_reg,
8449                 .policy = nl80211_policy,
8450                 /* can be retrieved by unprivileged users */
8451         },
8452         {
8453                 .cmd = NL80211_CMD_SET_REG,
8454                 .doit = nl80211_set_reg,
8455                 .policy = nl80211_policy,
8456                 .flags = GENL_ADMIN_PERM,
8457         },
8458         {
8459                 .cmd = NL80211_CMD_REQ_SET_REG,
8460                 .doit = nl80211_req_set_reg,
8461                 .policy = nl80211_policy,
8462                 .flags = GENL_ADMIN_PERM,
8463         },
8464         {
8465                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8466                 .doit = nl80211_get_mesh_config,
8467                 .policy = nl80211_policy,
8468                 /* can be retrieved by unprivileged users */
8469                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8470                                   NL80211_FLAG_NEED_RTNL,
8471         },
8472         {
8473                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8474                 .doit = nl80211_update_mesh_config,
8475                 .policy = nl80211_policy,
8476                 .flags = GENL_ADMIN_PERM,
8477                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8478                                   NL80211_FLAG_NEED_RTNL,
8479         },
8480         {
8481                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8482                 .doit = nl80211_trigger_scan,
8483                 .policy = nl80211_policy,
8484                 .flags = GENL_ADMIN_PERM,
8485                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8486                                   NL80211_FLAG_NEED_RTNL,
8487         },
8488         {
8489                 .cmd = NL80211_CMD_GET_SCAN,
8490                 .policy = nl80211_policy,
8491                 .dumpit = nl80211_dump_scan,
8492         },
8493         {
8494                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8495                 .doit = nl80211_start_sched_scan,
8496                 .policy = nl80211_policy,
8497                 .flags = GENL_ADMIN_PERM,
8498                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8499                                   NL80211_FLAG_NEED_RTNL,
8500         },
8501         {
8502                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8503                 .doit = nl80211_stop_sched_scan,
8504                 .policy = nl80211_policy,
8505                 .flags = GENL_ADMIN_PERM,
8506                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8507                                   NL80211_FLAG_NEED_RTNL,
8508         },
8509         {
8510                 .cmd = NL80211_CMD_AUTHENTICATE,
8511                 .doit = nl80211_authenticate,
8512                 .policy = nl80211_policy,
8513                 .flags = GENL_ADMIN_PERM,
8514                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8515                                   NL80211_FLAG_NEED_RTNL,
8516         },
8517         {
8518                 .cmd = NL80211_CMD_ASSOCIATE,
8519                 .doit = nl80211_associate,
8520                 .policy = nl80211_policy,
8521                 .flags = GENL_ADMIN_PERM,
8522                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8523                                   NL80211_FLAG_NEED_RTNL,
8524         },
8525         {
8526                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8527                 .doit = nl80211_deauthenticate,
8528                 .policy = nl80211_policy,
8529                 .flags = GENL_ADMIN_PERM,
8530                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8531                                   NL80211_FLAG_NEED_RTNL,
8532         },
8533         {
8534                 .cmd = NL80211_CMD_DISASSOCIATE,
8535                 .doit = nl80211_disassociate,
8536                 .policy = nl80211_policy,
8537                 .flags = GENL_ADMIN_PERM,
8538                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8539                                   NL80211_FLAG_NEED_RTNL,
8540         },
8541         {
8542                 .cmd = NL80211_CMD_JOIN_IBSS,
8543                 .doit = nl80211_join_ibss,
8544                 .policy = nl80211_policy,
8545                 .flags = GENL_ADMIN_PERM,
8546                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8547                                   NL80211_FLAG_NEED_RTNL,
8548         },
8549         {
8550                 .cmd = NL80211_CMD_LEAVE_IBSS,
8551                 .doit = nl80211_leave_ibss,
8552                 .policy = nl80211_policy,
8553                 .flags = GENL_ADMIN_PERM,
8554                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8555                                   NL80211_FLAG_NEED_RTNL,
8556         },
8557 #ifdef CONFIG_NL80211_TESTMODE
8558         {
8559                 .cmd = NL80211_CMD_TESTMODE,
8560                 .doit = nl80211_testmode_do,
8561                 .dumpit = nl80211_testmode_dump,
8562                 .policy = nl80211_policy,
8563                 .flags = GENL_ADMIN_PERM,
8564                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8565                                   NL80211_FLAG_NEED_RTNL,
8566         },
8567 #endif
8568         {
8569                 .cmd = NL80211_CMD_CONNECT,
8570                 .doit = nl80211_connect,
8571                 .policy = nl80211_policy,
8572                 .flags = GENL_ADMIN_PERM,
8573                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8574                                   NL80211_FLAG_NEED_RTNL,
8575         },
8576         {
8577                 .cmd = NL80211_CMD_DISCONNECT,
8578                 .doit = nl80211_disconnect,
8579                 .policy = nl80211_policy,
8580                 .flags = GENL_ADMIN_PERM,
8581                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8582                                   NL80211_FLAG_NEED_RTNL,
8583         },
8584         {
8585                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8586                 .doit = nl80211_wiphy_netns,
8587                 .policy = nl80211_policy,
8588                 .flags = GENL_ADMIN_PERM,
8589                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8590                                   NL80211_FLAG_NEED_RTNL,
8591         },
8592         {
8593                 .cmd = NL80211_CMD_GET_SURVEY,
8594                 .policy = nl80211_policy,
8595                 .dumpit = nl80211_dump_survey,
8596         },
8597         {
8598                 .cmd = NL80211_CMD_SET_PMKSA,
8599                 .doit = nl80211_setdel_pmksa,
8600                 .policy = nl80211_policy,
8601                 .flags = GENL_ADMIN_PERM,
8602                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8603                                   NL80211_FLAG_NEED_RTNL,
8604         },
8605         {
8606                 .cmd = NL80211_CMD_DEL_PMKSA,
8607                 .doit = nl80211_setdel_pmksa,
8608                 .policy = nl80211_policy,
8609                 .flags = GENL_ADMIN_PERM,
8610                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8611                                   NL80211_FLAG_NEED_RTNL,
8612         },
8613         {
8614                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8615                 .doit = nl80211_flush_pmksa,
8616                 .policy = nl80211_policy,
8617                 .flags = GENL_ADMIN_PERM,
8618                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8619                                   NL80211_FLAG_NEED_RTNL,
8620         },
8621         {
8622                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8623                 .doit = nl80211_remain_on_channel,
8624                 .policy = nl80211_policy,
8625                 .flags = GENL_ADMIN_PERM,
8626                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8627                                   NL80211_FLAG_NEED_RTNL,
8628         },
8629         {
8630                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8631                 .doit = nl80211_cancel_remain_on_channel,
8632                 .policy = nl80211_policy,
8633                 .flags = GENL_ADMIN_PERM,
8634                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8635                                   NL80211_FLAG_NEED_RTNL,
8636         },
8637         {
8638                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8639                 .doit = nl80211_set_tx_bitrate_mask,
8640                 .policy = nl80211_policy,
8641                 .flags = GENL_ADMIN_PERM,
8642                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8643                                   NL80211_FLAG_NEED_RTNL,
8644         },
8645         {
8646                 .cmd = NL80211_CMD_REGISTER_FRAME,
8647                 .doit = nl80211_register_mgmt,
8648                 .policy = nl80211_policy,
8649                 .flags = GENL_ADMIN_PERM,
8650                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8651                                   NL80211_FLAG_NEED_RTNL,
8652         },
8653         {
8654                 .cmd = NL80211_CMD_FRAME,
8655                 .doit = nl80211_tx_mgmt,
8656                 .policy = nl80211_policy,
8657                 .flags = GENL_ADMIN_PERM,
8658                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8659                                   NL80211_FLAG_NEED_RTNL,
8660         },
8661         {
8662                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8663                 .doit = nl80211_tx_mgmt_cancel_wait,
8664                 .policy = nl80211_policy,
8665                 .flags = GENL_ADMIN_PERM,
8666                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8667                                   NL80211_FLAG_NEED_RTNL,
8668         },
8669         {
8670                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8671                 .doit = nl80211_set_power_save,
8672                 .policy = nl80211_policy,
8673                 .flags = GENL_ADMIN_PERM,
8674                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8675                                   NL80211_FLAG_NEED_RTNL,
8676         },
8677         {
8678                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8679                 .doit = nl80211_get_power_save,
8680                 .policy = nl80211_policy,
8681                 /* can be retrieved by unprivileged users */
8682                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8683                                   NL80211_FLAG_NEED_RTNL,
8684         },
8685         {
8686                 .cmd = NL80211_CMD_SET_CQM,
8687                 .doit = nl80211_set_cqm,
8688                 .policy = nl80211_policy,
8689                 .flags = GENL_ADMIN_PERM,
8690                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8691                                   NL80211_FLAG_NEED_RTNL,
8692         },
8693         {
8694                 .cmd = NL80211_CMD_SET_CHANNEL,
8695                 .doit = nl80211_set_channel,
8696                 .policy = nl80211_policy,
8697                 .flags = GENL_ADMIN_PERM,
8698                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8699                                   NL80211_FLAG_NEED_RTNL,
8700         },
8701         {
8702                 .cmd = NL80211_CMD_SET_WDS_PEER,
8703                 .doit = nl80211_set_wds_peer,
8704                 .policy = nl80211_policy,
8705                 .flags = GENL_ADMIN_PERM,
8706                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8707                                   NL80211_FLAG_NEED_RTNL,
8708         },
8709         {
8710                 .cmd = NL80211_CMD_JOIN_MESH,
8711                 .doit = nl80211_join_mesh,
8712                 .policy = nl80211_policy,
8713                 .flags = GENL_ADMIN_PERM,
8714                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8715                                   NL80211_FLAG_NEED_RTNL,
8716         },
8717         {
8718                 .cmd = NL80211_CMD_LEAVE_MESH,
8719                 .doit = nl80211_leave_mesh,
8720                 .policy = nl80211_policy,
8721                 .flags = GENL_ADMIN_PERM,
8722                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8723                                   NL80211_FLAG_NEED_RTNL,
8724         },
8725 #ifdef CONFIG_PM
8726         {
8727                 .cmd = NL80211_CMD_GET_WOWLAN,
8728                 .doit = nl80211_get_wowlan,
8729                 .policy = nl80211_policy,
8730                 /* can be retrieved by unprivileged users */
8731                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8732                                   NL80211_FLAG_NEED_RTNL,
8733         },
8734         {
8735                 .cmd = NL80211_CMD_SET_WOWLAN,
8736                 .doit = nl80211_set_wowlan,
8737                 .policy = nl80211_policy,
8738                 .flags = GENL_ADMIN_PERM,
8739                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8740                                   NL80211_FLAG_NEED_RTNL,
8741         },
8742 #endif
8743         {
8744                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8745                 .doit = nl80211_set_rekey_data,
8746                 .policy = nl80211_policy,
8747                 .flags = GENL_ADMIN_PERM,
8748                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8749                                   NL80211_FLAG_NEED_RTNL,
8750         },
8751         {
8752                 .cmd = NL80211_CMD_TDLS_MGMT,
8753                 .doit = nl80211_tdls_mgmt,
8754                 .policy = nl80211_policy,
8755                 .flags = GENL_ADMIN_PERM,
8756                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8757                                   NL80211_FLAG_NEED_RTNL,
8758         },
8759         {
8760                 .cmd = NL80211_CMD_TDLS_OPER,
8761                 .doit = nl80211_tdls_oper,
8762                 .policy = nl80211_policy,
8763                 .flags = GENL_ADMIN_PERM,
8764                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8765                                   NL80211_FLAG_NEED_RTNL,
8766         },
8767         {
8768                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8769                 .doit = nl80211_register_unexpected_frame,
8770                 .policy = nl80211_policy,
8771                 .flags = GENL_ADMIN_PERM,
8772                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8773                                   NL80211_FLAG_NEED_RTNL,
8774         },
8775         {
8776                 .cmd = NL80211_CMD_PROBE_CLIENT,
8777                 .doit = nl80211_probe_client,
8778                 .policy = nl80211_policy,
8779                 .flags = GENL_ADMIN_PERM,
8780                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8781                                   NL80211_FLAG_NEED_RTNL,
8782         },
8783         {
8784                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8785                 .doit = nl80211_register_beacons,
8786                 .policy = nl80211_policy,
8787                 .flags = GENL_ADMIN_PERM,
8788                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8789                                   NL80211_FLAG_NEED_RTNL,
8790         },
8791         {
8792                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8793                 .doit = nl80211_set_noack_map,
8794                 .policy = nl80211_policy,
8795                 .flags = GENL_ADMIN_PERM,
8796                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8797                                   NL80211_FLAG_NEED_RTNL,
8798         },
8799         {
8800                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8801                 .doit = nl80211_start_p2p_device,
8802                 .policy = nl80211_policy,
8803                 .flags = GENL_ADMIN_PERM,
8804                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8805                                   NL80211_FLAG_NEED_RTNL,
8806         },
8807         {
8808                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8809                 .doit = nl80211_stop_p2p_device,
8810                 .policy = nl80211_policy,
8811                 .flags = GENL_ADMIN_PERM,
8812                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8813                                   NL80211_FLAG_NEED_RTNL,
8814         },
8815         {
8816                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8817                 .doit = nl80211_set_mcast_rate,
8818                 .policy = nl80211_policy,
8819                 .flags = GENL_ADMIN_PERM,
8820                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8821                                   NL80211_FLAG_NEED_RTNL,
8822         },
8823         {
8824                 .cmd = NL80211_CMD_SET_MAC_ACL,
8825                 .doit = nl80211_set_mac_acl,
8826                 .policy = nl80211_policy,
8827                 .flags = GENL_ADMIN_PERM,
8828                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8829                                   NL80211_FLAG_NEED_RTNL,
8830         },
8831         {
8832                 .cmd = NL80211_CMD_RADAR_DETECT,
8833                 .doit = nl80211_start_radar_detection,
8834                 .policy = nl80211_policy,
8835                 .flags = GENL_ADMIN_PERM,
8836                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8837                                   NL80211_FLAG_NEED_RTNL,
8838         },
8839         {
8840                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
8841                 .doit = nl80211_get_protocol_features,
8842                 .policy = nl80211_policy,
8843         },
8844 };
8845
8846 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8847         .name = "mlme",
8848 };
8849
8850 /* multicast groups */
8851 static struct genl_multicast_group nl80211_config_mcgrp = {
8852         .name = "config",
8853 };
8854 static struct genl_multicast_group nl80211_scan_mcgrp = {
8855         .name = "scan",
8856 };
8857 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8858         .name = "regulatory",
8859 };
8860
8861 /* notification functions */
8862
8863 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8864 {
8865         struct sk_buff *msg;
8866
8867         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8868         if (!msg)
8869                 return;
8870
8871         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0,
8872                                false, NULL, NULL, NULL) < 0) {
8873                 nlmsg_free(msg);
8874                 return;
8875         }
8876
8877         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8878                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8879 }
8880
8881 static int nl80211_add_scan_req(struct sk_buff *msg,
8882                                 struct cfg80211_registered_device *rdev)
8883 {
8884         struct cfg80211_scan_request *req = rdev->scan_req;
8885         struct nlattr *nest;
8886         int i;
8887
8888         ASSERT_RDEV_LOCK(rdev);
8889
8890         if (WARN_ON(!req))
8891                 return 0;
8892
8893         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8894         if (!nest)
8895                 goto nla_put_failure;
8896         for (i = 0; i < req->n_ssids; i++) {
8897                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8898                         goto nla_put_failure;
8899         }
8900         nla_nest_end(msg, nest);
8901
8902         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8903         if (!nest)
8904                 goto nla_put_failure;
8905         for (i = 0; i < req->n_channels; i++) {
8906                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8907                         goto nla_put_failure;
8908         }
8909         nla_nest_end(msg, nest);
8910
8911         if (req->ie &&
8912             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8913                 goto nla_put_failure;
8914
8915         if (req->flags)
8916                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8917
8918         return 0;
8919  nla_put_failure:
8920         return -ENOBUFS;
8921 }
8922
8923 static int nl80211_send_scan_msg(struct sk_buff *msg,
8924                                  struct cfg80211_registered_device *rdev,
8925                                  struct wireless_dev *wdev,
8926                                  u32 portid, u32 seq, int flags,
8927                                  u32 cmd)
8928 {
8929         void *hdr;
8930
8931         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8932         if (!hdr)
8933                 return -1;
8934
8935         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8936             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8937                                          wdev->netdev->ifindex)) ||
8938             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8939                 goto nla_put_failure;
8940
8941         /* ignore errors and send incomplete event anyway */
8942         nl80211_add_scan_req(msg, rdev);
8943
8944         return genlmsg_end(msg, hdr);
8945
8946  nla_put_failure:
8947         genlmsg_cancel(msg, hdr);
8948         return -EMSGSIZE;
8949 }
8950
8951 static int
8952 nl80211_send_sched_scan_msg(struct sk_buff *msg,
8953                             struct cfg80211_registered_device *rdev,
8954                             struct net_device *netdev,
8955                             u32 portid, u32 seq, int flags, u32 cmd)
8956 {
8957         void *hdr;
8958
8959         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8960         if (!hdr)
8961                 return -1;
8962
8963         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8964             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8965                 goto nla_put_failure;
8966
8967         return genlmsg_end(msg, hdr);
8968
8969  nla_put_failure:
8970         genlmsg_cancel(msg, hdr);
8971         return -EMSGSIZE;
8972 }
8973
8974 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
8975                              struct wireless_dev *wdev)
8976 {
8977         struct sk_buff *msg;
8978
8979         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8980         if (!msg)
8981                 return;
8982
8983         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8984                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
8985                 nlmsg_free(msg);
8986                 return;
8987         }
8988
8989         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8990                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8991 }
8992
8993 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
8994                             struct wireless_dev *wdev)
8995 {
8996         struct sk_buff *msg;
8997
8998         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8999         if (!msg)
9000                 return;
9001
9002         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9003                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9004                 nlmsg_free(msg);
9005                 return;
9006         }
9007
9008         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9009                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9010 }
9011
9012 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9013                                struct wireless_dev *wdev)
9014 {
9015         struct sk_buff *msg;
9016
9017         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9018         if (!msg)
9019                 return;
9020
9021         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9022                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9023                 nlmsg_free(msg);
9024                 return;
9025         }
9026
9027         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9028                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9029 }
9030
9031 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9032                                      struct net_device *netdev)
9033 {
9034         struct sk_buff *msg;
9035
9036         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9037         if (!msg)
9038                 return;
9039
9040         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9041                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9042                 nlmsg_free(msg);
9043                 return;
9044         }
9045
9046         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9047                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9048 }
9049
9050 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9051                              struct net_device *netdev, u32 cmd)
9052 {
9053         struct sk_buff *msg;
9054
9055         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9056         if (!msg)
9057                 return;
9058
9059         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9060                 nlmsg_free(msg);
9061                 return;
9062         }
9063
9064         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9065                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9066 }
9067
9068 /*
9069  * This can happen on global regulatory changes or device specific settings
9070  * based on custom world regulatory domains.
9071  */
9072 void nl80211_send_reg_change_event(struct regulatory_request *request)
9073 {
9074         struct sk_buff *msg;
9075         void *hdr;
9076
9077         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9078         if (!msg)
9079                 return;
9080
9081         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9082         if (!hdr) {
9083                 nlmsg_free(msg);
9084                 return;
9085         }
9086
9087         /* Userspace can always count this one always being set */
9088         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9089                 goto nla_put_failure;
9090
9091         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9092                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9093                                NL80211_REGDOM_TYPE_WORLD))
9094                         goto nla_put_failure;
9095         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9096                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9097                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9098                         goto nla_put_failure;
9099         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9100                    request->intersect) {
9101                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9102                                NL80211_REGDOM_TYPE_INTERSECTION))
9103                         goto nla_put_failure;
9104         } else {
9105                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9106                                NL80211_REGDOM_TYPE_COUNTRY) ||
9107                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9108                                    request->alpha2))
9109                         goto nla_put_failure;
9110         }
9111
9112         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9113             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9114                 goto nla_put_failure;
9115
9116         genlmsg_end(msg, hdr);
9117
9118         rcu_read_lock();
9119         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9120                                 GFP_ATOMIC);
9121         rcu_read_unlock();
9122
9123         return;
9124
9125 nla_put_failure:
9126         genlmsg_cancel(msg, hdr);
9127         nlmsg_free(msg);
9128 }
9129
9130 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9131                                     struct net_device *netdev,
9132                                     const u8 *buf, size_t len,
9133                                     enum nl80211_commands cmd, gfp_t gfp)
9134 {
9135         struct sk_buff *msg;
9136         void *hdr;
9137
9138         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9139         if (!msg)
9140                 return;
9141
9142         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9143         if (!hdr) {
9144                 nlmsg_free(msg);
9145                 return;
9146         }
9147
9148         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9149             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9150             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9151                 goto nla_put_failure;
9152
9153         genlmsg_end(msg, hdr);
9154
9155         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9156                                 nl80211_mlme_mcgrp.id, gfp);
9157         return;
9158
9159  nla_put_failure:
9160         genlmsg_cancel(msg, hdr);
9161         nlmsg_free(msg);
9162 }
9163
9164 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9165                           struct net_device *netdev, const u8 *buf,
9166                           size_t len, gfp_t gfp)
9167 {
9168         nl80211_send_mlme_event(rdev, netdev, buf, len,
9169                                 NL80211_CMD_AUTHENTICATE, gfp);
9170 }
9171
9172 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9173                            struct net_device *netdev, const u8 *buf,
9174                            size_t len, gfp_t gfp)
9175 {
9176         nl80211_send_mlme_event(rdev, netdev, buf, len,
9177                                 NL80211_CMD_ASSOCIATE, gfp);
9178 }
9179
9180 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9181                          struct net_device *netdev, const u8 *buf,
9182                          size_t len, gfp_t gfp)
9183 {
9184         nl80211_send_mlme_event(rdev, netdev, buf, len,
9185                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9186 }
9187
9188 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9189                            struct net_device *netdev, const u8 *buf,
9190                            size_t len, gfp_t gfp)
9191 {
9192         nl80211_send_mlme_event(rdev, netdev, buf, len,
9193                                 NL80211_CMD_DISASSOCIATE, gfp);
9194 }
9195
9196 void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
9197                                  size_t len)
9198 {
9199         struct wireless_dev *wdev = dev->ieee80211_ptr;
9200         struct wiphy *wiphy = wdev->wiphy;
9201         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9202
9203         trace_cfg80211_send_unprot_deauth(dev);
9204         nl80211_send_mlme_event(rdev, dev, buf, len,
9205                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, GFP_ATOMIC);
9206 }
9207 EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
9208
9209 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
9210                                    size_t len)
9211 {
9212         struct wireless_dev *wdev = dev->ieee80211_ptr;
9213         struct wiphy *wiphy = wdev->wiphy;
9214         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9215
9216         trace_cfg80211_send_unprot_disassoc(dev);
9217         nl80211_send_mlme_event(rdev, dev, buf, len,
9218                                 NL80211_CMD_UNPROT_DISASSOCIATE, GFP_ATOMIC);
9219 }
9220 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
9221
9222 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9223                                       struct net_device *netdev, int cmd,
9224                                       const u8 *addr, gfp_t gfp)
9225 {
9226         struct sk_buff *msg;
9227         void *hdr;
9228
9229         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9230         if (!msg)
9231                 return;
9232
9233         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9234         if (!hdr) {
9235                 nlmsg_free(msg);
9236                 return;
9237         }
9238
9239         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9240             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9241             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9242             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9243                 goto nla_put_failure;
9244
9245         genlmsg_end(msg, hdr);
9246
9247         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9248                                 nl80211_mlme_mcgrp.id, gfp);
9249         return;
9250
9251  nla_put_failure:
9252         genlmsg_cancel(msg, hdr);
9253         nlmsg_free(msg);
9254 }
9255
9256 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9257                                struct net_device *netdev, const u8 *addr,
9258                                gfp_t gfp)
9259 {
9260         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9261                                   addr, gfp);
9262 }
9263
9264 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9265                                 struct net_device *netdev, const u8 *addr,
9266                                 gfp_t gfp)
9267 {
9268         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9269                                   addr, gfp);
9270 }
9271
9272 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9273                                  struct net_device *netdev, const u8 *bssid,
9274                                  const u8 *req_ie, size_t req_ie_len,
9275                                  const u8 *resp_ie, size_t resp_ie_len,
9276                                  u16 status, gfp_t gfp)
9277 {
9278         struct sk_buff *msg;
9279         void *hdr;
9280
9281         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9282         if (!msg)
9283                 return;
9284
9285         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9286         if (!hdr) {
9287                 nlmsg_free(msg);
9288                 return;
9289         }
9290
9291         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9292             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9293             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9294             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9295             (req_ie &&
9296              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9297             (resp_ie &&
9298              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9299                 goto nla_put_failure;
9300
9301         genlmsg_end(msg, hdr);
9302
9303         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9304                                 nl80211_mlme_mcgrp.id, gfp);
9305         return;
9306
9307  nla_put_failure:
9308         genlmsg_cancel(msg, hdr);
9309         nlmsg_free(msg);
9310
9311 }
9312
9313 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9314                          struct net_device *netdev, const u8 *bssid,
9315                          const u8 *req_ie, size_t req_ie_len,
9316                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9317 {
9318         struct sk_buff *msg;
9319         void *hdr;
9320
9321         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9322         if (!msg)
9323                 return;
9324
9325         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9326         if (!hdr) {
9327                 nlmsg_free(msg);
9328                 return;
9329         }
9330
9331         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9332             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9333             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9334             (req_ie &&
9335              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9336             (resp_ie &&
9337              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9338                 goto nla_put_failure;
9339
9340         genlmsg_end(msg, hdr);
9341
9342         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9343                                 nl80211_mlme_mcgrp.id, gfp);
9344         return;
9345
9346  nla_put_failure:
9347         genlmsg_cancel(msg, hdr);
9348         nlmsg_free(msg);
9349
9350 }
9351
9352 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9353                                struct net_device *netdev, u16 reason,
9354                                const u8 *ie, size_t ie_len, bool from_ap)
9355 {
9356         struct sk_buff *msg;
9357         void *hdr;
9358
9359         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9360         if (!msg)
9361                 return;
9362
9363         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9364         if (!hdr) {
9365                 nlmsg_free(msg);
9366                 return;
9367         }
9368
9369         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9370             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9371             (from_ap && reason &&
9372              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9373             (from_ap &&
9374              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9375             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9376                 goto nla_put_failure;
9377
9378         genlmsg_end(msg, hdr);
9379
9380         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9381                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9382         return;
9383
9384  nla_put_failure:
9385         genlmsg_cancel(msg, hdr);
9386         nlmsg_free(msg);
9387
9388 }
9389
9390 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9391                              struct net_device *netdev, const u8 *bssid,
9392                              gfp_t gfp)
9393 {
9394         struct sk_buff *msg;
9395         void *hdr;
9396
9397         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9398         if (!msg)
9399                 return;
9400
9401         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9402         if (!hdr) {
9403                 nlmsg_free(msg);
9404                 return;
9405         }
9406
9407         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9408             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9409             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9410                 goto nla_put_failure;
9411
9412         genlmsg_end(msg, hdr);
9413
9414         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9415                                 nl80211_mlme_mcgrp.id, gfp);
9416         return;
9417
9418  nla_put_failure:
9419         genlmsg_cancel(msg, hdr);
9420         nlmsg_free(msg);
9421 }
9422
9423 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9424                                         const u8* ie, u8 ie_len, gfp_t gfp)
9425 {
9426         struct wireless_dev *wdev = dev->ieee80211_ptr;
9427         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9428         struct sk_buff *msg;
9429         void *hdr;
9430
9431         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9432                 return;
9433
9434         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9435
9436         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9437         if (!msg)
9438                 return;
9439
9440         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9441         if (!hdr) {
9442                 nlmsg_free(msg);
9443                 return;
9444         }
9445
9446         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9447             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9448             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9449             (ie_len && ie &&
9450              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9451                 goto nla_put_failure;
9452
9453         genlmsg_end(msg, hdr);
9454
9455         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9456                                 nl80211_mlme_mcgrp.id, gfp);
9457         return;
9458
9459  nla_put_failure:
9460         genlmsg_cancel(msg, hdr);
9461         nlmsg_free(msg);
9462 }
9463 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9464
9465 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9466                                  struct net_device *netdev, const u8 *addr,
9467                                  enum nl80211_key_type key_type, int key_id,
9468                                  const u8 *tsc, gfp_t gfp)
9469 {
9470         struct sk_buff *msg;
9471         void *hdr;
9472
9473         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9474         if (!msg)
9475                 return;
9476
9477         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9478         if (!hdr) {
9479                 nlmsg_free(msg);
9480                 return;
9481         }
9482
9483         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9484             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9485             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9486             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9487             (key_id != -1 &&
9488              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9489             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9490                 goto nla_put_failure;
9491
9492         genlmsg_end(msg, hdr);
9493
9494         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9495                                 nl80211_mlme_mcgrp.id, gfp);
9496         return;
9497
9498  nla_put_failure:
9499         genlmsg_cancel(msg, hdr);
9500         nlmsg_free(msg);
9501 }
9502
9503 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9504                                     struct ieee80211_channel *channel_before,
9505                                     struct ieee80211_channel *channel_after)
9506 {
9507         struct sk_buff *msg;
9508         void *hdr;
9509         struct nlattr *nl_freq;
9510
9511         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9512         if (!msg)
9513                 return;
9514
9515         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9516         if (!hdr) {
9517                 nlmsg_free(msg);
9518                 return;
9519         }
9520
9521         /*
9522          * Since we are applying the beacon hint to a wiphy we know its
9523          * wiphy_idx is valid
9524          */
9525         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9526                 goto nla_put_failure;
9527
9528         /* Before */
9529         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9530         if (!nl_freq)
9531                 goto nla_put_failure;
9532         if (nl80211_msg_put_channel(msg, channel_before, false))
9533                 goto nla_put_failure;
9534         nla_nest_end(msg, nl_freq);
9535
9536         /* After */
9537         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9538         if (!nl_freq)
9539                 goto nla_put_failure;
9540         if (nl80211_msg_put_channel(msg, channel_after, false))
9541                 goto nla_put_failure;
9542         nla_nest_end(msg, nl_freq);
9543
9544         genlmsg_end(msg, hdr);
9545
9546         rcu_read_lock();
9547         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9548                                 GFP_ATOMIC);
9549         rcu_read_unlock();
9550
9551         return;
9552
9553 nla_put_failure:
9554         genlmsg_cancel(msg, hdr);
9555         nlmsg_free(msg);
9556 }
9557
9558 static void nl80211_send_remain_on_chan_event(
9559         int cmd, struct cfg80211_registered_device *rdev,
9560         struct wireless_dev *wdev, u64 cookie,
9561         struct ieee80211_channel *chan,
9562         unsigned int duration, gfp_t gfp)
9563 {
9564         struct sk_buff *msg;
9565         void *hdr;
9566
9567         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9568         if (!msg)
9569                 return;
9570
9571         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9572         if (!hdr) {
9573                 nlmsg_free(msg);
9574                 return;
9575         }
9576
9577         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9578             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9579                                          wdev->netdev->ifindex)) ||
9580             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9581             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9582             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9583                         NL80211_CHAN_NO_HT) ||
9584             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9585                 goto nla_put_failure;
9586
9587         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9588             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9589                 goto nla_put_failure;
9590
9591         genlmsg_end(msg, hdr);
9592
9593         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9594                                 nl80211_mlme_mcgrp.id, gfp);
9595         return;
9596
9597  nla_put_failure:
9598         genlmsg_cancel(msg, hdr);
9599         nlmsg_free(msg);
9600 }
9601
9602 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9603                                struct ieee80211_channel *chan,
9604                                unsigned int duration, gfp_t gfp)
9605 {
9606         struct wiphy *wiphy = wdev->wiphy;
9607         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9608
9609         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9610         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9611                                           rdev, wdev, cookie, chan,
9612                                           duration, gfp);
9613 }
9614 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9615
9616 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9617                                         struct ieee80211_channel *chan,
9618                                         gfp_t gfp)
9619 {
9620         struct wiphy *wiphy = wdev->wiphy;
9621         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9622
9623         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9624         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9625                                           rdev, wdev, cookie, chan, 0, gfp);
9626 }
9627 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9628
9629 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9630                       struct station_info *sinfo, gfp_t gfp)
9631 {
9632         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9633         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9634         struct sk_buff *msg;
9635
9636         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9637
9638         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9639         if (!msg)
9640                 return;
9641
9642         if (nl80211_send_station(msg, 0, 0, 0,
9643                                  rdev, dev, mac_addr, sinfo) < 0) {
9644                 nlmsg_free(msg);
9645                 return;
9646         }
9647
9648         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9649                                 nl80211_mlme_mcgrp.id, gfp);
9650 }
9651 EXPORT_SYMBOL(cfg80211_new_sta);
9652
9653 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9654 {
9655         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9656         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9657         struct sk_buff *msg;
9658         void *hdr;
9659
9660         trace_cfg80211_del_sta(dev, mac_addr);
9661
9662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9663         if (!msg)
9664                 return;
9665
9666         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9667         if (!hdr) {
9668                 nlmsg_free(msg);
9669                 return;
9670         }
9671
9672         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9673             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9674                 goto nla_put_failure;
9675
9676         genlmsg_end(msg, hdr);
9677
9678         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9679                                 nl80211_mlme_mcgrp.id, gfp);
9680         return;
9681
9682  nla_put_failure:
9683         genlmsg_cancel(msg, hdr);
9684         nlmsg_free(msg);
9685 }
9686 EXPORT_SYMBOL(cfg80211_del_sta);
9687
9688 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9689                           enum nl80211_connect_failed_reason reason,
9690                           gfp_t gfp)
9691 {
9692         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9693         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9694         struct sk_buff *msg;
9695         void *hdr;
9696
9697         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9698         if (!msg)
9699                 return;
9700
9701         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9702         if (!hdr) {
9703                 nlmsg_free(msg);
9704                 return;
9705         }
9706
9707         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9708             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9709             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9710                 goto nla_put_failure;
9711
9712         genlmsg_end(msg, hdr);
9713
9714         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9715                                 nl80211_mlme_mcgrp.id, gfp);
9716         return;
9717
9718  nla_put_failure:
9719         genlmsg_cancel(msg, hdr);
9720         nlmsg_free(msg);
9721 }
9722 EXPORT_SYMBOL(cfg80211_conn_failed);
9723
9724 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9725                                        const u8 *addr, gfp_t gfp)
9726 {
9727         struct wireless_dev *wdev = dev->ieee80211_ptr;
9728         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9729         struct sk_buff *msg;
9730         void *hdr;
9731         int err;
9732         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9733
9734         if (!nlportid)
9735                 return false;
9736
9737         msg = nlmsg_new(100, gfp);
9738         if (!msg)
9739                 return true;
9740
9741         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9742         if (!hdr) {
9743                 nlmsg_free(msg);
9744                 return true;
9745         }
9746
9747         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9748             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9749             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9750                 goto nla_put_failure;
9751
9752         err = genlmsg_end(msg, hdr);
9753         if (err < 0) {
9754                 nlmsg_free(msg);
9755                 return true;
9756         }
9757
9758         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9759         return true;
9760
9761  nla_put_failure:
9762         genlmsg_cancel(msg, hdr);
9763         nlmsg_free(msg);
9764         return true;
9765 }
9766
9767 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9768                                 const u8 *addr, gfp_t gfp)
9769 {
9770         struct wireless_dev *wdev = dev->ieee80211_ptr;
9771         bool ret;
9772
9773         trace_cfg80211_rx_spurious_frame(dev, addr);
9774
9775         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9776                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9777                 trace_cfg80211_return_bool(false);
9778                 return false;
9779         }
9780         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9781                                          addr, gfp);
9782         trace_cfg80211_return_bool(ret);
9783         return ret;
9784 }
9785 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9786
9787 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9788                                         const u8 *addr, gfp_t gfp)
9789 {
9790         struct wireless_dev *wdev = dev->ieee80211_ptr;
9791         bool ret;
9792
9793         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9794
9795         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9796                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9797                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9798                 trace_cfg80211_return_bool(false);
9799                 return false;
9800         }
9801         ret = __nl80211_unexpected_frame(dev,
9802                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9803                                          addr, gfp);
9804         trace_cfg80211_return_bool(ret);
9805         return ret;
9806 }
9807 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9808
9809 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9810                       struct wireless_dev *wdev, u32 nlportid,
9811                       int freq, int sig_dbm,
9812                       const u8 *buf, size_t len, gfp_t gfp)
9813 {
9814         struct net_device *netdev = wdev->netdev;
9815         struct sk_buff *msg;
9816         void *hdr;
9817
9818         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9819         if (!msg)
9820                 return -ENOMEM;
9821
9822         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9823         if (!hdr) {
9824                 nlmsg_free(msg);
9825                 return -ENOMEM;
9826         }
9827
9828         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9829             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9830                                         netdev->ifindex)) ||
9831             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9832             (sig_dbm &&
9833              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9834             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9835                 goto nla_put_failure;
9836
9837         genlmsg_end(msg, hdr);
9838
9839         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9840
9841  nla_put_failure:
9842         genlmsg_cancel(msg, hdr);
9843         nlmsg_free(msg);
9844         return -ENOBUFS;
9845 }
9846
9847 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
9848                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
9849 {
9850         struct wiphy *wiphy = wdev->wiphy;
9851         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9852         struct net_device *netdev = wdev->netdev;
9853         struct sk_buff *msg;
9854         void *hdr;
9855
9856         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
9857
9858         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9859         if (!msg)
9860                 return;
9861
9862         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9863         if (!hdr) {
9864                 nlmsg_free(msg);
9865                 return;
9866         }
9867
9868         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9869             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9870                                    netdev->ifindex)) ||
9871             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9872             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9873             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9874                 goto nla_put_failure;
9875
9876         genlmsg_end(msg, hdr);
9877
9878         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9879         return;
9880
9881  nla_put_failure:
9882         genlmsg_cancel(msg, hdr);
9883         nlmsg_free(msg);
9884 }
9885 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
9886
9887 void cfg80211_cqm_rssi_notify(struct net_device *dev,
9888                               enum nl80211_cqm_rssi_threshold_event rssi_event,
9889                               gfp_t gfp)
9890 {
9891         struct wireless_dev *wdev = dev->ieee80211_ptr;
9892         struct wiphy *wiphy = wdev->wiphy;
9893         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9894         struct sk_buff *msg;
9895         struct nlattr *pinfoattr;
9896         void *hdr;
9897
9898         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
9899
9900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9901         if (!msg)
9902                 return;
9903
9904         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9905         if (!hdr) {
9906                 nlmsg_free(msg);
9907                 return;
9908         }
9909
9910         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9911             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
9912                 goto nla_put_failure;
9913
9914         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9915         if (!pinfoattr)
9916                 goto nla_put_failure;
9917
9918         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9919                         rssi_event))
9920                 goto nla_put_failure;
9921
9922         nla_nest_end(msg, pinfoattr);
9923
9924         genlmsg_end(msg, hdr);
9925
9926         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9927                                 nl80211_mlme_mcgrp.id, gfp);
9928         return;
9929
9930  nla_put_failure:
9931         genlmsg_cancel(msg, hdr);
9932         nlmsg_free(msg);
9933 }
9934 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
9935
9936 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9937                                      struct net_device *netdev, const u8 *bssid,
9938                                      const u8 *replay_ctr, gfp_t gfp)
9939 {
9940         struct sk_buff *msg;
9941         struct nlattr *rekey_attr;
9942         void *hdr;
9943
9944         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9945         if (!msg)
9946                 return;
9947
9948         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
9949         if (!hdr) {
9950                 nlmsg_free(msg);
9951                 return;
9952         }
9953
9954         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9955             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9956             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9957                 goto nla_put_failure;
9958
9959         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
9960         if (!rekey_attr)
9961                 goto nla_put_failure;
9962
9963         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
9964                     NL80211_REPLAY_CTR_LEN, replay_ctr))
9965                 goto nla_put_failure;
9966
9967         nla_nest_end(msg, rekey_attr);
9968
9969         genlmsg_end(msg, hdr);
9970
9971         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9972                                 nl80211_mlme_mcgrp.id, gfp);
9973         return;
9974
9975  nla_put_failure:
9976         genlmsg_cancel(msg, hdr);
9977         nlmsg_free(msg);
9978 }
9979
9980 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
9981                                const u8 *replay_ctr, gfp_t gfp)
9982 {
9983         struct wireless_dev *wdev = dev->ieee80211_ptr;
9984         struct wiphy *wiphy = wdev->wiphy;
9985         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9986
9987         trace_cfg80211_gtk_rekey_notify(dev, bssid);
9988         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
9989 }
9990 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
9991
9992 static void
9993 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
9994                                struct net_device *netdev, int index,
9995                                const u8 *bssid, bool preauth, gfp_t gfp)
9996 {
9997         struct sk_buff *msg;
9998         struct nlattr *attr;
9999         void *hdr;
10000
10001         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10002         if (!msg)
10003                 return;
10004
10005         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10006         if (!hdr) {
10007                 nlmsg_free(msg);
10008                 return;
10009         }
10010
10011         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10012             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10013                 goto nla_put_failure;
10014
10015         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10016         if (!attr)
10017                 goto nla_put_failure;
10018
10019         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10020             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10021             (preauth &&
10022              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10023                 goto nla_put_failure;
10024
10025         nla_nest_end(msg, attr);
10026
10027         genlmsg_end(msg, hdr);
10028
10029         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10030                                 nl80211_mlme_mcgrp.id, gfp);
10031         return;
10032
10033  nla_put_failure:
10034         genlmsg_cancel(msg, hdr);
10035         nlmsg_free(msg);
10036 }
10037
10038 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10039                                      const u8 *bssid, bool preauth, gfp_t gfp)
10040 {
10041         struct wireless_dev *wdev = dev->ieee80211_ptr;
10042         struct wiphy *wiphy = wdev->wiphy;
10043         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10044
10045         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10046         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10047 }
10048 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10049
10050 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10051                                      struct net_device *netdev,
10052                                      struct cfg80211_chan_def *chandef,
10053                                      gfp_t gfp)
10054 {
10055         struct sk_buff *msg;
10056         void *hdr;
10057
10058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10059         if (!msg)
10060                 return;
10061
10062         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10063         if (!hdr) {
10064                 nlmsg_free(msg);
10065                 return;
10066         }
10067
10068         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10069                 goto nla_put_failure;
10070
10071         if (nl80211_send_chandef(msg, chandef))
10072                 goto nla_put_failure;
10073
10074         genlmsg_end(msg, hdr);
10075
10076         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10077                                 nl80211_mlme_mcgrp.id, gfp);
10078         return;
10079
10080  nla_put_failure:
10081         genlmsg_cancel(msg, hdr);
10082         nlmsg_free(msg);
10083 }
10084
10085 void cfg80211_ch_switch_notify(struct net_device *dev,
10086                                struct cfg80211_chan_def *chandef)
10087 {
10088         struct wireless_dev *wdev = dev->ieee80211_ptr;
10089         struct wiphy *wiphy = wdev->wiphy;
10090         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10091
10092         trace_cfg80211_ch_switch_notify(dev, chandef);
10093
10094         wdev_lock(wdev);
10095
10096         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10097                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10098                 goto out;
10099
10100         wdev->channel = chandef->chan;
10101         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10102 out:
10103         wdev_unlock(wdev);
10104         return;
10105 }
10106 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10107
10108 void cfg80211_cqm_txe_notify(struct net_device *dev,
10109                              const u8 *peer, u32 num_packets,
10110                              u32 rate, u32 intvl, gfp_t gfp)
10111 {
10112         struct wireless_dev *wdev = dev->ieee80211_ptr;
10113         struct wiphy *wiphy = wdev->wiphy;
10114         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10115         struct sk_buff *msg;
10116         struct nlattr *pinfoattr;
10117         void *hdr;
10118
10119         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10120         if (!msg)
10121                 return;
10122
10123         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10124         if (!hdr) {
10125                 nlmsg_free(msg);
10126                 return;
10127         }
10128
10129         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10130             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10131             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10132                 goto nla_put_failure;
10133
10134         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10135         if (!pinfoattr)
10136                 goto nla_put_failure;
10137
10138         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10139                 goto nla_put_failure;
10140
10141         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10142                 goto nla_put_failure;
10143
10144         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10145                 goto nla_put_failure;
10146
10147         nla_nest_end(msg, pinfoattr);
10148
10149         genlmsg_end(msg, hdr);
10150
10151         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10152                                 nl80211_mlme_mcgrp.id, gfp);
10153         return;
10154
10155  nla_put_failure:
10156         genlmsg_cancel(msg, hdr);
10157         nlmsg_free(msg);
10158 }
10159 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10160
10161 void
10162 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10163                      struct cfg80211_chan_def *chandef,
10164                      enum nl80211_radar_event event,
10165                      struct net_device *netdev, gfp_t gfp)
10166 {
10167         struct sk_buff *msg;
10168         void *hdr;
10169
10170         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10171         if (!msg)
10172                 return;
10173
10174         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10175         if (!hdr) {
10176                 nlmsg_free(msg);
10177                 return;
10178         }
10179
10180         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10181                 goto nla_put_failure;
10182
10183         /* NOP and radar events don't need a netdev parameter */
10184         if (netdev) {
10185                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10186
10187                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10188                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10189                         goto nla_put_failure;
10190         }
10191
10192         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10193                 goto nla_put_failure;
10194
10195         if (nl80211_send_chandef(msg, chandef))
10196                 goto nla_put_failure;
10197
10198         if (genlmsg_end(msg, hdr) < 0) {
10199                 nlmsg_free(msg);
10200                 return;
10201         }
10202
10203         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10204                                 nl80211_mlme_mcgrp.id, gfp);
10205         return;
10206
10207  nla_put_failure:
10208         genlmsg_cancel(msg, hdr);
10209         nlmsg_free(msg);
10210 }
10211
10212 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10213                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10214 {
10215         struct wireless_dev *wdev = dev->ieee80211_ptr;
10216         struct wiphy *wiphy = wdev->wiphy;
10217         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10218         struct sk_buff *msg;
10219         struct nlattr *pinfoattr;
10220         void *hdr;
10221
10222         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10223
10224         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10225         if (!msg)
10226                 return;
10227
10228         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10229         if (!hdr) {
10230                 nlmsg_free(msg);
10231                 return;
10232         }
10233
10234         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10235             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10236             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10237                 goto nla_put_failure;
10238
10239         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10240         if (!pinfoattr)
10241                 goto nla_put_failure;
10242
10243         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10244                 goto nla_put_failure;
10245
10246         nla_nest_end(msg, pinfoattr);
10247
10248         genlmsg_end(msg, hdr);
10249
10250         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10251                                 nl80211_mlme_mcgrp.id, gfp);
10252         return;
10253
10254  nla_put_failure:
10255         genlmsg_cancel(msg, hdr);
10256         nlmsg_free(msg);
10257 }
10258 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10259
10260 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10261                            u64 cookie, bool acked, gfp_t gfp)
10262 {
10263         struct wireless_dev *wdev = dev->ieee80211_ptr;
10264         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10265         struct sk_buff *msg;
10266         void *hdr;
10267         int err;
10268
10269         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10270
10271         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10272
10273         if (!msg)
10274                 return;
10275
10276         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10277         if (!hdr) {
10278                 nlmsg_free(msg);
10279                 return;
10280         }
10281
10282         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10283             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10284             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10285             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10286             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10287                 goto nla_put_failure;
10288
10289         err = genlmsg_end(msg, hdr);
10290         if (err < 0) {
10291                 nlmsg_free(msg);
10292                 return;
10293         }
10294
10295         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10296                                 nl80211_mlme_mcgrp.id, gfp);
10297         return;
10298
10299  nla_put_failure:
10300         genlmsg_cancel(msg, hdr);
10301         nlmsg_free(msg);
10302 }
10303 EXPORT_SYMBOL(cfg80211_probe_status);
10304
10305 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10306                                  const u8 *frame, size_t len,
10307                                  int freq, int sig_dbm)
10308 {
10309         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10310         struct sk_buff *msg;
10311         void *hdr;
10312         struct cfg80211_beacon_registration *reg;
10313
10314         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10315
10316         spin_lock_bh(&rdev->beacon_registrations_lock);
10317         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10318                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10319                 if (!msg) {
10320                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10321                         return;
10322                 }
10323
10324                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10325                 if (!hdr)
10326                         goto nla_put_failure;
10327
10328                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10329                     (freq &&
10330                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10331                     (sig_dbm &&
10332                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10333                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10334                         goto nla_put_failure;
10335
10336                 genlmsg_end(msg, hdr);
10337
10338                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10339         }
10340         spin_unlock_bh(&rdev->beacon_registrations_lock);
10341         return;
10342
10343  nla_put_failure:
10344         spin_unlock_bh(&rdev->beacon_registrations_lock);
10345         if (hdr)
10346                 genlmsg_cancel(msg, hdr);
10347         nlmsg_free(msg);
10348 }
10349 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10350
10351 #ifdef CONFIG_PM
10352 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10353                                    struct cfg80211_wowlan_wakeup *wakeup,
10354                                    gfp_t gfp)
10355 {
10356         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10357         struct sk_buff *msg;
10358         void *hdr;
10359         int err, size = 200;
10360
10361         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10362
10363         if (wakeup)
10364                 size += wakeup->packet_present_len;
10365
10366         msg = nlmsg_new(size, gfp);
10367         if (!msg)
10368                 return;
10369
10370         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10371         if (!hdr)
10372                 goto free_msg;
10373
10374         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10375             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10376                 goto free_msg;
10377
10378         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10379                                         wdev->netdev->ifindex))
10380                 goto free_msg;
10381
10382         if (wakeup) {
10383                 struct nlattr *reasons;
10384
10385                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10386
10387                 if (wakeup->disconnect &&
10388                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10389                         goto free_msg;
10390                 if (wakeup->magic_pkt &&
10391                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10392                         goto free_msg;
10393                 if (wakeup->gtk_rekey_failure &&
10394                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10395                         goto free_msg;
10396                 if (wakeup->eap_identity_req &&
10397                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10398                         goto free_msg;
10399                 if (wakeup->four_way_handshake &&
10400                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10401                         goto free_msg;
10402                 if (wakeup->rfkill_release &&
10403                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10404                         goto free_msg;
10405
10406                 if (wakeup->pattern_idx >= 0 &&
10407                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10408                                 wakeup->pattern_idx))
10409                         goto free_msg;
10410
10411                 if (wakeup->tcp_match)
10412                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10413
10414                 if (wakeup->tcp_connlost)
10415                         nla_put_flag(msg,
10416                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10417
10418                 if (wakeup->tcp_nomoretokens)
10419                         nla_put_flag(msg,
10420                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10421
10422                 if (wakeup->packet) {
10423                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10424                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10425
10426                         if (!wakeup->packet_80211) {
10427                                 pkt_attr =
10428                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10429                                 len_attr =
10430                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10431                         }
10432
10433                         if (wakeup->packet_len &&
10434                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10435                                 goto free_msg;
10436
10437                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10438                                     wakeup->packet))
10439                                 goto free_msg;
10440                 }
10441
10442                 nla_nest_end(msg, reasons);
10443         }
10444
10445         err = genlmsg_end(msg, hdr);
10446         if (err < 0)
10447                 goto free_msg;
10448
10449         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10450                                 nl80211_mlme_mcgrp.id, gfp);
10451         return;
10452
10453  free_msg:
10454         nlmsg_free(msg);
10455 }
10456 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10457 #endif
10458
10459 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10460                                 enum nl80211_tdls_operation oper,
10461                                 u16 reason_code, gfp_t gfp)
10462 {
10463         struct wireless_dev *wdev = dev->ieee80211_ptr;
10464         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10465         struct sk_buff *msg;
10466         void *hdr;
10467         int err;
10468
10469         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10470                                          reason_code);
10471
10472         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10473         if (!msg)
10474                 return;
10475
10476         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10477         if (!hdr) {
10478                 nlmsg_free(msg);
10479                 return;
10480         }
10481
10482         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10483             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10484             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10485             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10486             (reason_code > 0 &&
10487              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10488                 goto nla_put_failure;
10489
10490         err = genlmsg_end(msg, hdr);
10491         if (err < 0) {
10492                 nlmsg_free(msg);
10493                 return;
10494         }
10495
10496         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10497                                 nl80211_mlme_mcgrp.id, gfp);
10498         return;
10499
10500  nla_put_failure:
10501         genlmsg_cancel(msg, hdr);
10502         nlmsg_free(msg);
10503 }
10504 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10505
10506 static int nl80211_netlink_notify(struct notifier_block * nb,
10507                                   unsigned long state,
10508                                   void *_notify)
10509 {
10510         struct netlink_notify *notify = _notify;
10511         struct cfg80211_registered_device *rdev;
10512         struct wireless_dev *wdev;
10513         struct cfg80211_beacon_registration *reg, *tmp;
10514
10515         if (state != NETLINK_URELEASE)
10516                 return NOTIFY_DONE;
10517
10518         rcu_read_lock();
10519
10520         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10521                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10522                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10523
10524                 spin_lock_bh(&rdev->beacon_registrations_lock);
10525                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10526                                          list) {
10527                         if (reg->nlportid == notify->portid) {
10528                                 list_del(&reg->list);
10529                                 kfree(reg);
10530                                 break;
10531                         }
10532                 }
10533                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10534         }
10535
10536         rcu_read_unlock();
10537
10538         return NOTIFY_DONE;
10539 }
10540
10541 static struct notifier_block nl80211_netlink_notifier = {
10542         .notifier_call = nl80211_netlink_notify,
10543 };
10544
10545 /* initialisation/exit functions */
10546
10547 int nl80211_init(void)
10548 {
10549         int err;
10550
10551         err = genl_register_family_with_ops(&nl80211_fam,
10552                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10553         if (err)
10554                 return err;
10555
10556         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10557         if (err)
10558                 goto err_out;
10559
10560         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10561         if (err)
10562                 goto err_out;
10563
10564         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10565         if (err)
10566                 goto err_out;
10567
10568         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10569         if (err)
10570                 goto err_out;
10571
10572 #ifdef CONFIG_NL80211_TESTMODE
10573         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10574         if (err)
10575                 goto err_out;
10576 #endif
10577
10578         err = netlink_register_notifier(&nl80211_netlink_notifier);
10579         if (err)
10580                 goto err_out;
10581
10582         return 0;
10583  err_out:
10584         genl_unregister_family(&nl80211_fam);
10585         return err;
10586 }
10587
10588 void nl80211_exit(void)
10589 {
10590         netlink_unregister_notifier(&nl80211_netlink_notifier);
10591         genl_unregister_family(&nl80211_fam);
10592 }