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_GENL_NAME,      /* 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_RTNL();
  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                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94
  95                 if (result)
  96                         break;
  97         }
  98
  99         if (result)
 100                 return result;
 101         return ERR_PTR(-ENODEV);
 102 }
 103
 104 static struct cfg80211_registered_device *
 105 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 106 {
 107         struct cfg80211_registered_device *rdev = NULL, *tmp;
 108         struct net_device *netdev;
 109
 110         ASSERT_RTNL();
 111
 112         if (!attrs[NL80211_ATTR_WIPHY] &&
 113             !attrs[NL80211_ATTR_IFINDEX] &&
 114             !attrs[NL80211_ATTR_WDEV])
 115                 return ERR_PTR(-EINVAL);
 116
 117         if (attrs[NL80211_ATTR_WIPHY])
 118                 rdev = cfg80211_rdev_by_wiphy_idx(
 119                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 120
 121         if (attrs[NL80211_ATTR_WDEV]) {
 122                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 123                 struct wireless_dev *wdev;
 124                 bool found = false;
 125
 126                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 127                 if (tmp) {
 128                         /* make sure wdev exists */
 129                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 130                                 if (wdev->identifier != (u32)wdev_id)
 131                                         continue;
 132                                 found = true;
 133                                 break;
 134                         }
 135
 136                         if (!found)
 137                                 tmp = NULL;
 138
 139                         if (rdev && tmp != rdev)
 140                                 return ERR_PTR(-EINVAL);
 141                         rdev = tmp;
 142                 }
 143         }
 144
 145         if (attrs[NL80211_ATTR_IFINDEX]) {
 146                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 147                 netdev = dev_get_by_index(netns, ifindex);
 148                 if (netdev) {
 149                         if (netdev->ieee80211_ptr)
 150                                 tmp = wiphy_to_dev(
 151                                                 netdev->ieee80211_ptr->wiphy);
 152                         else
 153                                 tmp = NULL;
 154
 155                         dev_put(netdev);
 156
 157                         /* not wireless device -- return error */
 158                         if (!tmp)
 159                                 return ERR_PTR(-EINVAL);
 160
 161                         /* mismatch -- return error */
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         rdev = tmp;
 166                 }
 167         }
 168
 169         if (!rdev)
 170                 return ERR_PTR(-ENODEV);
 171
 172         if (netns != wiphy_net(&rdev->wiphy))
 173                 return ERR_PTR(-ENODEV);
 174
 175         return rdev;
 176 }
 177
 178 /*
 179  * This function returns a pointer to the driver
 180  * that the genl_info item that is passed refers to.
 181  *
 182  * The result of this can be a PTR_ERR and hence must
 183  * be checked with IS_ERR() for errors.
 184  */
 185 static struct cfg80211_registered_device *
 186 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 187 {
 188         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 189 }
 190
 191 /* policy for the attributes */
 192 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 193         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 194         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 195                                       .len = 20-1 },
 196         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 197
 198         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 199         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 200         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 201         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 202         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 203
 204         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 205         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 206         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 207         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 208         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 209
 210         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 211         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 212         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 213
 214         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 215         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 216
 217         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 218         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 219                                     .len = WLAN_MAX_KEY_LEN },
 220         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 221         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 222         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 223         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 224         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 227         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 229                                        .len = IEEE80211_MAX_DATA_LEN },
 230         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 231                                        .len = IEEE80211_MAX_DATA_LEN },
 232         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 233         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 234         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 235         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 236                                                .len = NL80211_MAX_SUPP_RATES },
 237         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 238         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 239         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 240         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 241                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 242         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 243
 244         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 245         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 246
 247         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 248         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 249         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 250         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 251                                            .len = NL80211_MAX_SUPP_RATES },
 252         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 253
 254         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 255         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 256
 257         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 258
 259         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 261                               .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 264
 265         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 266                                 .len = IEEE80211_MAX_SSID_LEN },
 267         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 268         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 269         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 270         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 271         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 272         [NL80211_ATTR_STA_FLAGS2] = {
 273                 .len = sizeof(struct nl80211_sta_flag_update),
 274         },
 275         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 276         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 277         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 278         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 280         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 281         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 282         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 283         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 284                                  .len = WLAN_PMKID_LEN },
 285         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 286         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 287         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 288         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 289                                  .len = IEEE80211_MAX_DATA_LEN },
 290         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 291         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 292         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 293         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 295         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 296         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 297         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 300         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 301         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 303         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 304         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 305         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 306         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 308         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 309         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 310                                          .len = IEEE80211_MAX_DATA_LEN },
 311         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 312                                          .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 314         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 317         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 318         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 319         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 320         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 322         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 323                                       .len = IEEE80211_MAX_DATA_LEN },
 324         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 325         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 327                 .len = NL80211_HT_CAPABILITY_LEN
 328         },
 329         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 330         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 331         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 332         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 333         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 334         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 335         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 336         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 337         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 338         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 339         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 340         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 341         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 342         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 343         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 344         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 346                 .len = NL80211_VHT_CAPABILITY_LEN,
 347         },
 348         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 349         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 350                                   .len = IEEE80211_MAX_DATA_LEN },
 351         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 352 };
 353
 354 /* policy for the key attributes */
 355 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 356         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 357         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 358         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 359         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 360         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 361         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 362         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 363         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 364 };
 365
 366 /* policy for the key default flags */
 367 static const struct nla_policy
 368 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 369         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 370         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 371 };
 372
 373 /* policy for WoWLAN attributes */
 374 static const struct nla_policy
 375 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 376         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 377         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 378         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 379         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 380         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 381         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 382         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 383         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 384         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 385 };
 386
 387 static const struct nla_policy
 388 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 389         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 390         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 391         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 392         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 393         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 394         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 395         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 396                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 397         },
 398         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 399                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 400         },
 401         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 402         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 403         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 404 };
 405
 406 /* policy for GTK rekey offload attributes */
 407 static const struct nla_policy
 408 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 409         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 410         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 411         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 412 };
 413
 414 static const struct nla_policy
 415 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 416         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 417                                                  .len = IEEE80211_MAX_SSID_LEN },
 418         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 419 };
 420
 421 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 422                                      struct netlink_callback *cb,
 423                                      struct cfg80211_registered_device **rdev,
 424                                      struct wireless_dev **wdev)
 425 {
 426         int err;
 427
 428         rtnl_lock();
 429
 430         if (!cb->args[0]) {
 431                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 432                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 433                                   nl80211_policy);
 434                 if (err)
 435                         goto out_unlock;
 436
 437                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 438                                                    nl80211_fam.attrbuf);
 439                 if (IS_ERR(*wdev)) {
 440                         err = PTR_ERR(*wdev);
 441                         goto out_unlock;
 442                 }
 443                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 444                 cb->args[0] = (*rdev)->wiphy_idx;
 445                 cb->args[1] = (*wdev)->identifier;
 446         } else {
 447                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0]);
 448                 struct wireless_dev *tmp;
 449
 450                 if (!wiphy) {
 451                         err = -ENODEV;
 452                         goto out_unlock;
 453                 }
 454                 *rdev = wiphy_to_dev(wiphy);
 455                 *wdev = NULL;
 456
 457                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 458                         if (tmp->identifier == cb->args[1]) {
 459                                 *wdev = tmp;
 460                                 break;
 461                         }
 462                 }
 463
 464                 if (!*wdev) {
 465                         err = -ENODEV;
 466                         goto out_unlock;
 467                 }
 468         }
 469
 470         return 0;
 471  out_unlock:
 472         rtnl_unlock();
 473         return err;
 474 }
 475
 476 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 477 {
 478         rtnl_unlock();
 479 }
 480
 481 /* IE validation */
 482 static bool is_valid_ie_attr(const struct nlattr *attr)
 483 {
 484         const u8 *pos;
 485         int len;
 486
 487         if (!attr)
 488                 return true;
 489
 490         pos = nla_data(attr);
 491         len = nla_len(attr);
 492
 493         while (len) {
 494                 u8 elemlen;
 495
 496                 if (len < 2)
 497                         return false;
 498                 len -= 2;
 499
 500                 elemlen = pos[1];
 501                 if (elemlen > len)
 502                         return false;
 503
 504                 len -= elemlen;
 505                 pos += 2 + elemlen;
 506         }
 507
 508         return true;
 509 }
 510
 511 /* message building helper */
 512 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 513                                    int flags, u8 cmd)
 514 {
 515         /* since there is no private header just add the generic one */
 516         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 517 }
 518
 519 static int nl80211_msg_put_channel(struct sk_buff *msg,
 520                                    struct ieee80211_channel *chan,
 521                                    bool large)
 522 {
 523         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 524                         chan->center_freq))
 525                 goto nla_put_failure;
 526
 527         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 528             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 529                 goto nla_put_failure;
 530         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 531             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 532                 goto nla_put_failure;
 533         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 534             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 535                 goto nla_put_failure;
 536         if (chan->flags & IEEE80211_CHAN_RADAR) {
 537                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 538                         goto nla_put_failure;
 539                 if (large) {
 540                         u32 time;
 541
 542                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 543
 544                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 545                                         chan->dfs_state))
 546                                 goto nla_put_failure;
 547                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 548                                         time))
 549                                 goto nla_put_failure;
 550                 }
 551         }
 552
 553         if (large) {
 554                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 555                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 556                         goto nla_put_failure;
 557                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 558                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 559                         goto nla_put_failure;
 560                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 561                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 562                         goto nla_put_failure;
 563                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 564                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 565                         goto nla_put_failure;
 566         }
 567
 568         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 569                         DBM_TO_MBM(chan->max_power)))
 570                 goto nla_put_failure;
 571
 572         return 0;
 573
 574  nla_put_failure:
 575         return -ENOBUFS;
 576 }
 577
 578 /* netlink command implementations */
 579
 580 struct key_parse {
 581         struct key_params p;
 582         int idx;
 583         int type;
 584         bool def, defmgmt;
 585         bool def_uni, def_multi;
 586 };
 587
 588 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 589 {
 590         struct nlattr *tb[NL80211_KEY_MAX + 1];
 591         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 592                                    nl80211_key_policy);
 593         if (err)
 594                 return err;
 595
 596         k->def = !!tb[NL80211_KEY_DEFAULT];
 597         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 598
 599         if (k->def) {
 600                 k->def_uni = true;
 601                 k->def_multi = true;
 602         }
 603         if (k->defmgmt)
 604                 k->def_multi = true;
 605
 606         if (tb[NL80211_KEY_IDX])
 607                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 608
 609         if (tb[NL80211_KEY_DATA]) {
 610                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 611                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 612         }
 613
 614         if (tb[NL80211_KEY_SEQ]) {
 615                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 616                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 617         }
 618
 619         if (tb[NL80211_KEY_CIPHER])
 620                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 621
 622         if (tb[NL80211_KEY_TYPE]) {
 623                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 624                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 625                         return -EINVAL;
 626         }
 627
 628         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 629                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 630                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 631                                        tb[NL80211_KEY_DEFAULT_TYPES],
 632                                        nl80211_key_default_policy);
 633                 if (err)
 634                         return err;
 635
 636                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 637                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 638         }
 639
 640         return 0;
 641 }
 642
 643 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 644 {
 645         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 646                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 647                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 648         }
 649
 650         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 651                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 652                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 653         }
 654
 655         if (info->attrs[NL80211_ATTR_KEY_IDX])
 656                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 657
 658         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 659                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 660
 661         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 662         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 663
 664         if (k->def) {
 665                 k->def_uni = true;
 666                 k->def_multi = true;
 667         }
 668         if (k->defmgmt)
 669                 k->def_multi = true;
 670
 671         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 672                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 673                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 674                         return -EINVAL;
 675         }
 676
 677         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 678                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 679                 int err = nla_parse_nested(
 680                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 681                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 682                                 nl80211_key_default_policy);
 683                 if (err)
 684                         return err;
 685
 686                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 687                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 688         }
 689
 690         return 0;
 691 }
 692
 693 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 694 {
 695         int err;
 696
 697         memset(k, 0, sizeof(*k));
 698         k->idx = -1;
 699         k->type = -1;
 700
 701         if (info->attrs[NL80211_ATTR_KEY])
 702                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 703         else
 704                 err = nl80211_parse_key_old(info, k);
 705
 706         if (err)
 707                 return err;
 708
 709         if (k->def && k->defmgmt)
 710                 return -EINVAL;
 711
 712         if (k->defmgmt) {
 713                 if (k->def_uni || !k->def_multi)
 714                         return -EINVAL;
 715         }
 716
 717         if (k->idx != -1) {
 718                 if (k->defmgmt) {
 719                         if (k->idx < 4 || k->idx > 5)
 720                                 return -EINVAL;
 721                 } else if (k->def) {
 722                         if (k->idx < 0 || k->idx > 3)
 723                                 return -EINVAL;
 724                 } else {
 725                         if (k->idx < 0 || k->idx > 5)
 726                                 return -EINVAL;
 727                 }
 728         }
 729
 730         return 0;
 731 }
 732
 733 static struct cfg80211_cached_keys *
 734 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 735                        struct nlattr *keys, bool *no_ht)
 736 {
 737         struct key_parse parse;
 738         struct nlattr *key;
 739         struct cfg80211_cached_keys *result;
 740         int rem, err, def = 0;
 741
 742         result = kzalloc(sizeof(*result), GFP_KERNEL);
 743         if (!result)
 744                 return ERR_PTR(-ENOMEM);
 745
 746         result->def = -1;
 747         result->defmgmt = -1;
 748
 749         nla_for_each_nested(key, keys, rem) {
 750                 memset(&parse, 0, sizeof(parse));
 751                 parse.idx = -1;
 752
 753                 err = nl80211_parse_key_new(key, &parse);
 754                 if (err)
 755                         goto error;
 756                 err = -EINVAL;
 757                 if (!parse.p.key)
 758                         goto error;
 759                 if (parse.idx < 0 || parse.idx > 4)
 760                         goto error;
 761                 if (parse.def) {
 762                         if (def)
 763                                 goto error;
 764                         def = 1;
 765                         result->def = parse.idx;
 766                         if (!parse.def_uni || !parse.def_multi)
 767                                 goto error;
 768                 } else if (parse.defmgmt)
 769                         goto error;
 770                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 771                                                      parse.idx, false, NULL);
 772                 if (err)
 773                         goto error;
 774                 result->params[parse.idx].cipher = parse.p.cipher;
 775                 result->params[parse.idx].key_len = parse.p.key_len;
 776                 result->params[parse.idx].key = result->data[parse.idx];
 777                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 778
 779                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 780                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 781                         if (no_ht)
 782                                 *no_ht = true;
 783                 }
 784         }
 785
 786         return result;
 787  error:
 788         kfree(result);
 789         return ERR_PTR(err);
 790 }
 791
 792 static int nl80211_key_allowed(struct wireless_dev *wdev)
 793 {
 794         ASSERT_WDEV_LOCK(wdev);
 795
 796         switch (wdev->iftype) {
 797         case NL80211_IFTYPE_AP:
 798         case NL80211_IFTYPE_AP_VLAN:
 799         case NL80211_IFTYPE_P2P_GO:
 800         case NL80211_IFTYPE_MESH_POINT:
 801                 break;
 802         case NL80211_IFTYPE_ADHOC:
 803         case NL80211_IFTYPE_STATION:
 804         case NL80211_IFTYPE_P2P_CLIENT:
 805                 if (!wdev->current_bss)
 806                         return -ENOLINK;
 807                 break;
 808         default:
 809                 return -EINVAL;
 810         }
 811
 812         return 0;
 813 }
 814
 815 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 816 {
 817         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 818         int i;
 819
 820         if (!nl_modes)
 821                 goto nla_put_failure;
 822
 823         i = 0;
 824         while (ifmodes) {
 825                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 826                         goto nla_put_failure;
 827                 ifmodes >>= 1;
 828                 i++;
 829         }
 830
 831         nla_nest_end(msg, nl_modes);
 832         return 0;
 833
 834 nla_put_failure:
 835         return -ENOBUFS;
 836 }
 837
 838 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 839                                           struct sk_buff *msg,
 840                                           bool large)
 841 {
 842         struct nlattr *nl_combis;
 843         int i, j;
 844
 845         nl_combis = nla_nest_start(msg,
 846                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 847         if (!nl_combis)
 848                 goto nla_put_failure;
 849
 850         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 851                 const struct ieee80211_iface_combination *c;
 852                 struct nlattr *nl_combi, *nl_limits;
 853
 854                 c = &wiphy->iface_combinations[i];
 855
 856                 nl_combi = nla_nest_start(msg, i + 1);
 857                 if (!nl_combi)
 858                         goto nla_put_failure;
 859
 860                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 861                 if (!nl_limits)
 862                         goto nla_put_failure;
 863
 864                 for (j = 0; j < c->n_limits; j++) {
 865                         struct nlattr *nl_limit;
 866
 867                         nl_limit = nla_nest_start(msg, j + 1);
 868                         if (!nl_limit)
 869                                 goto nla_put_failure;
 870                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 871                                         c->limits[j].max))
 872                                 goto nla_put_failure;
 873                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 874                                                 c->limits[j].types))
 875                                 goto nla_put_failure;
 876                         nla_nest_end(msg, nl_limit);
 877                 }
 878
 879                 nla_nest_end(msg, nl_limits);
 880
 881                 if (c->beacon_int_infra_match &&
 882                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 883                         goto nla_put_failure;
 884                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 885                                 c->num_different_channels) ||
 886                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 887                                 c->max_interfaces))
 888                         goto nla_put_failure;
 889                 if (large &&
 890                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 891                                 c->radar_detect_widths))
 892                         goto nla_put_failure;
 893
 894                 nla_nest_end(msg, nl_combi);
 895         }
 896
 897         nla_nest_end(msg, nl_combis);
 898
 899         return 0;
 900 nla_put_failure:
 901         return -ENOBUFS;
 902 }
 903
 904 #ifdef CONFIG_PM
 905 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 906                                         struct sk_buff *msg)
 907 {
 908         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 909         struct nlattr *nl_tcp;
 910
 911         if (!tcp)
 912                 return 0;
 913
 914         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 915         if (!nl_tcp)
 916                 return -ENOBUFS;
 917
 918         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 919                         tcp->data_payload_max))
 920                 return -ENOBUFS;
 921
 922         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 923                         tcp->data_payload_max))
 924                 return -ENOBUFS;
 925
 926         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 927                 return -ENOBUFS;
 928
 929         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 930                                 sizeof(*tcp->tok), tcp->tok))
 931                 return -ENOBUFS;
 932
 933         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 934                         tcp->data_interval_max))
 935                 return -ENOBUFS;
 936
 937         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 938                         tcp->wake_payload_max))
 939                 return -ENOBUFS;
 940
 941         nla_nest_end(msg, nl_tcp);
 942         return 0;
 943 }
 944
 945 static int nl80211_send_wowlan(struct sk_buff *msg,
 946                                struct cfg80211_registered_device *dev,
 947                                bool large)
 948 {
 949         struct nlattr *nl_wowlan;
 950
 951         if (!dev->wiphy.wowlan)
 952                 return 0;
 953
 954         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 955         if (!nl_wowlan)
 956                 return -ENOBUFS;
 957
 958         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 959              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 960             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 961              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 962             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 963              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 964             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 965              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 966             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 967              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 968             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 969              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 970             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 971              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 972             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 973              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 974                 return -ENOBUFS;
 975
 976         if (dev->wiphy.wowlan->n_patterns) {
 977                 struct nl80211_wowlan_pattern_support pat = {
 978                         .max_patterns = dev->wiphy.wowlan->n_patterns,
 979                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
 980                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
 981                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
 982                 };
 983
 984                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 985                             sizeof(pat), &pat))
 986                         return -ENOBUFS;
 987         }
 988
 989         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
 990                 return -ENOBUFS;
 991
 992         nla_nest_end(msg, nl_wowlan);
 993
 994         return 0;
 995 }
 996 #endif
 997
 998 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
 999                                       struct ieee80211_supported_band *sband)
1000 {
1001         struct nlattr *nl_rates, *nl_rate;
1002         struct ieee80211_rate *rate;
1003         int i;
1004
1005         /* add HT info */
1006         if (sband->ht_cap.ht_supported &&
1007             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1008                      sizeof(sband->ht_cap.mcs),
1009                      &sband->ht_cap.mcs) ||
1010              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1011                          sband->ht_cap.cap) ||
1012              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1013                         sband->ht_cap.ampdu_factor) ||
1014              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1015                         sband->ht_cap.ampdu_density)))
1016                 return -ENOBUFS;
1017
1018         /* add VHT info */
1019         if (sband->vht_cap.vht_supported &&
1020             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1021                      sizeof(sband->vht_cap.vht_mcs),
1022                      &sband->vht_cap.vht_mcs) ||
1023              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1024                          sband->vht_cap.cap)))
1025                 return -ENOBUFS;
1026
1027         /* add bitrates */
1028         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1029         if (!nl_rates)
1030                 return -ENOBUFS;
1031
1032         for (i = 0; i < sband->n_bitrates; i++) {
1033                 nl_rate = nla_nest_start(msg, i);
1034                 if (!nl_rate)
1035                         return -ENOBUFS;
1036
1037                 rate = &sband->bitrates[i];
1038                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1039                                 rate->bitrate))
1040                         return -ENOBUFS;
1041                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1042                     nla_put_flag(msg,
1043                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1044                         return -ENOBUFS;
1045
1046                 nla_nest_end(msg, nl_rate);
1047         }
1048
1049         nla_nest_end(msg, nl_rates);
1050
1051         return 0;
1052 }
1053
1054 static int
1055 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1056                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1057 {
1058         u16 stypes;
1059         struct nlattr *nl_ftypes, *nl_ifs;
1060         enum nl80211_iftype ift;
1061         int i;
1062
1063         if (!mgmt_stypes)
1064                 return 0;
1065
1066         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1067         if (!nl_ifs)
1068                 return -ENOBUFS;
1069
1070         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1071                 nl_ftypes = nla_nest_start(msg, ift);
1072                 if (!nl_ftypes)
1073                         return -ENOBUFS;
1074                 i = 0;
1075                 stypes = mgmt_stypes[ift].tx;
1076                 while (stypes) {
1077                         if ((stypes & 1) &&
1078                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1079                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1080                                 return -ENOBUFS;
1081                         stypes >>= 1;
1082                         i++;
1083                 }
1084                 nla_nest_end(msg, nl_ftypes);
1085         }
1086
1087         nla_nest_end(msg, nl_ifs);
1088
1089         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1090         if (!nl_ifs)
1091                 return -ENOBUFS;
1092
1093         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1094                 nl_ftypes = nla_nest_start(msg, ift);
1095                 if (!nl_ftypes)
1096                         return -ENOBUFS;
1097                 i = 0;
1098                 stypes = mgmt_stypes[ift].rx;
1099                 while (stypes) {
1100                         if ((stypes & 1) &&
1101                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1102                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1103                                 return -ENOBUFS;
1104                         stypes >>= 1;
1105                         i++;
1106                 }
1107                 nla_nest_end(msg, nl_ftypes);
1108         }
1109         nla_nest_end(msg, nl_ifs);
1110
1111         return 0;
1112 }
1113
1114 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1115                               struct sk_buff *msg, u32 portid, u32 seq,
1116                               int flags, bool split, long *split_start,
1117                               long *band_start, long *chan_start)
1118 {
1119         void *hdr;
1120         struct nlattr *nl_bands, *nl_band;
1121         struct nlattr *nl_freqs, *nl_freq;
1122         struct nlattr *nl_cmds;
1123         enum ieee80211_band band;
1124         struct ieee80211_channel *chan;
1125         int i;
1126         const struct ieee80211_txrx_stypes *mgmt_stypes =
1127                                 dev->wiphy.mgmt_stypes;
1128         long start = 0, start_chan = 0, start_band = 0;
1129         u32 features;
1130
1131         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1132         if (!hdr)
1133                 return -ENOBUFS;
1134
1135         /* allow always using the variables */
1136         if (!split) {
1137                 split_start = &start;
1138                 band_start = &start_band;
1139                 chan_start = &start_chan;
1140         }
1141
1142         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1143             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1144                            wiphy_name(&dev->wiphy)) ||
1145             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1146                         cfg80211_rdev_list_generation))
1147                 goto nla_put_failure;
1148
1149         switch (*split_start) {
1150         case 0:
1151                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1152                                dev->wiphy.retry_short) ||
1153                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1154                                dev->wiphy.retry_long) ||
1155                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1156                                 dev->wiphy.frag_threshold) ||
1157                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1158                                 dev->wiphy.rts_threshold) ||
1159                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1160                                dev->wiphy.coverage_class) ||
1161                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1162                                dev->wiphy.max_scan_ssids) ||
1163                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1164                                dev->wiphy.max_sched_scan_ssids) ||
1165                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1166                                 dev->wiphy.max_scan_ie_len) ||
1167                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1168                                 dev->wiphy.max_sched_scan_ie_len) ||
1169                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1170                                dev->wiphy.max_match_sets))
1171                         goto nla_put_failure;
1172
1173                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1174                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1175                         goto nla_put_failure;
1176                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1177                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1178                         goto nla_put_failure;
1179                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1180                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1181                         goto nla_put_failure;
1182                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1183                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1184                         goto nla_put_failure;
1185                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1186                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1187                         goto nla_put_failure;
1188                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1189                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1190                         goto nla_put_failure;
1191
1192                 (*split_start)++;
1193                 if (split)
1194                         break;
1195         case 1:
1196                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1197                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1198                             dev->wiphy.cipher_suites))
1199                         goto nla_put_failure;
1200
1201                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1202                                dev->wiphy.max_num_pmkids))
1203                         goto nla_put_failure;
1204
1205                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1206                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1207                         goto nla_put_failure;
1208
1209                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1210                                 dev->wiphy.available_antennas_tx) ||
1211                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1212                                 dev->wiphy.available_antennas_rx))
1213                         goto nla_put_failure;
1214
1215                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1216                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1217                                 dev->wiphy.probe_resp_offload))
1218                         goto nla_put_failure;
1219
1220                 if ((dev->wiphy.available_antennas_tx ||
1221                      dev->wiphy.available_antennas_rx) &&
1222                     dev->ops->get_antenna) {
1223                         u32 tx_ant = 0, rx_ant = 0;
1224                         int res;
1225                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1226                         if (!res) {
1227                                 if (nla_put_u32(msg,
1228                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1229                                                 tx_ant) ||
1230                                     nla_put_u32(msg,
1231                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1232                                                 rx_ant))
1233                                         goto nla_put_failure;
1234                         }
1235                 }
1236
1237                 (*split_start)++;
1238                 if (split)
1239                         break;
1240         case 2:
1241                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1242                                         dev->wiphy.interface_modes))
1243                                 goto nla_put_failure;
1244                 (*split_start)++;
1245                 if (split)
1246                         break;
1247         case 3:
1248                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1249                 if (!nl_bands)
1250                         goto nla_put_failure;
1251
1252                 for (band = *band_start; band < IEEE80211_NUM_BANDS; band++) {
1253                         struct ieee80211_supported_band *sband;
1254
1255                         sband = dev->wiphy.bands[band];
1256
1257                         if (!sband)
1258                                 continue;
1259
1260                         nl_band = nla_nest_start(msg, band);
1261                         if (!nl_band)
1262                                 goto nla_put_failure;
1263
1264                         switch (*chan_start) {
1265                         case 0:
1266                                 if (nl80211_send_band_rateinfo(msg, sband))
1267                                         goto nla_put_failure;
1268                                 (*chan_start)++;
1269                                 if (split)
1270                                         break;
1271                         default:
1272                                 /* add frequencies */
1273                                 nl_freqs = nla_nest_start(
1274                                         msg, NL80211_BAND_ATTR_FREQS);
1275                                 if (!nl_freqs)
1276                                         goto nla_put_failure;
1277
1278                                 for (i = *chan_start - 1;
1279                                      i < sband->n_channels;
1280                                      i++) {
1281                                         nl_freq = nla_nest_start(msg, i);
1282                                         if (!nl_freq)
1283                                                 goto nla_put_failure;
1284
1285                                         chan = &sband->channels[i];
1286
1287                                         if (nl80211_msg_put_channel(msg, chan,
1288                                                                     split))
1289                                                 goto nla_put_failure;
1290
1291                                         nla_nest_end(msg, nl_freq);
1292                                         if (split)
1293                                                 break;
1294                                 }
1295                                 if (i < sband->n_channels)
1296                                         *chan_start = i + 2;
1297                                 else
1298                                         *chan_start = 0;
1299                                 nla_nest_end(msg, nl_freqs);
1300                         }
1301
1302                         nla_nest_end(msg, nl_band);
1303
1304                         if (split) {
1305                                 /* start again here */
1306                                 if (*chan_start)
1307                                         band--;
1308                                 break;
1309                         }
1310                 }
1311                 nla_nest_end(msg, nl_bands);
1312
1313                 if (band < IEEE80211_NUM_BANDS)
1314                         *band_start = band + 1;
1315                 else
1316                         *band_start = 0;
1317
1318                 /* if bands & channels are done, continue outside */
1319                 if (*band_start == 0 && *chan_start == 0)
1320                         (*split_start)++;
1321                 if (split)
1322                         break;
1323         case 4:
1324                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1325                 if (!nl_cmds)
1326                         goto nla_put_failure;
1327
1328                 i = 0;
1329 #define CMD(op, n)                                                      \
1330                  do {                                                   \
1331                         if (dev->ops->op) {                             \
1332                                 i++;                                    \
1333                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1334                                         goto nla_put_failure;           \
1335                         }                                               \
1336                 } while (0)
1337
1338                 CMD(add_virtual_intf, NEW_INTERFACE);
1339                 CMD(change_virtual_intf, SET_INTERFACE);
1340                 CMD(add_key, NEW_KEY);
1341                 CMD(start_ap, START_AP);
1342                 CMD(add_station, NEW_STATION);
1343                 CMD(add_mpath, NEW_MPATH);
1344                 CMD(update_mesh_config, SET_MESH_CONFIG);
1345                 CMD(change_bss, SET_BSS);
1346                 CMD(auth, AUTHENTICATE);
1347                 CMD(assoc, ASSOCIATE);
1348                 CMD(deauth, DEAUTHENTICATE);
1349                 CMD(disassoc, DISASSOCIATE);
1350                 CMD(join_ibss, JOIN_IBSS);
1351                 CMD(join_mesh, JOIN_MESH);
1352                 CMD(set_pmksa, SET_PMKSA);
1353                 CMD(del_pmksa, DEL_PMKSA);
1354                 CMD(flush_pmksa, FLUSH_PMKSA);
1355                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1356                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1357                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1358                 CMD(mgmt_tx, FRAME);
1359                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1360                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1361                         i++;
1362                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1363                                 goto nla_put_failure;
1364                 }
1365                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1366                     dev->ops->join_mesh) {
1367                         i++;
1368                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1369                                 goto nla_put_failure;
1370                 }
1371                 CMD(set_wds_peer, SET_WDS_PEER);
1372                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1373                         CMD(tdls_mgmt, TDLS_MGMT);
1374                         CMD(tdls_oper, TDLS_OPER);
1375                 }
1376                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1377                         CMD(sched_scan_start, START_SCHED_SCAN);
1378                 CMD(probe_client, PROBE_CLIENT);
1379                 CMD(set_noack_map, SET_NOACK_MAP);
1380                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1381                         i++;
1382                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1383                                 goto nla_put_failure;
1384                 }
1385                 CMD(start_p2p_device, START_P2P_DEVICE);
1386                 CMD(set_mcast_rate, SET_MCAST_RATE);
1387                 if (split) {
1388                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1389                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1390                 }
1391
1392 #ifdef CONFIG_NL80211_TESTMODE
1393                 CMD(testmode_cmd, TESTMODE);
1394 #endif
1395
1396 #undef CMD
1397
1398                 if (dev->ops->connect || dev->ops->auth) {
1399                         i++;
1400                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1401                                 goto nla_put_failure;
1402                 }
1403
1404                 if (dev->ops->disconnect || dev->ops->deauth) {
1405                         i++;
1406                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1407                                 goto nla_put_failure;
1408                 }
1409
1410                 nla_nest_end(msg, nl_cmds);
1411                 (*split_start)++;
1412                 if (split)
1413                         break;
1414         case 5:
1415                 if (dev->ops->remain_on_channel &&
1416                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1417                     nla_put_u32(msg,
1418                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1419                                 dev->wiphy.max_remain_on_channel_duration))
1420                         goto nla_put_failure;
1421
1422                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1423                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1424                         goto nla_put_failure;
1425
1426                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1427                         goto nla_put_failure;
1428                 (*split_start)++;
1429                 if (split)
1430                         break;
1431         case 6:
1432 #ifdef CONFIG_PM
1433                 if (nl80211_send_wowlan(msg, dev, split))
1434                         goto nla_put_failure;
1435                 (*split_start)++;
1436                 if (split)
1437                         break;
1438 #else
1439                 (*split_start)++;
1440 #endif
1441         case 7:
1442                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1443                                         dev->wiphy.software_iftypes))
1444                         goto nla_put_failure;
1445
1446                 if (nl80211_put_iface_combinations(&dev->wiphy, msg, split))
1447                         goto nla_put_failure;
1448
1449                 (*split_start)++;
1450                 if (split)
1451                         break;
1452         case 8:
1453                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1454                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1455                                 dev->wiphy.ap_sme_capa))
1456                         goto nla_put_failure;
1457
1458                 features = dev->wiphy.features;
1459                 /*
1460                  * We can only add the per-channel limit information if the
1461                  * dump is split, otherwise it makes it too big. Therefore
1462                  * only advertise it in that case.
1463                  */
1464                 if (split)
1465                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1466                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1467                         goto nla_put_failure;
1468
1469                 if (dev->wiphy.ht_capa_mod_mask &&
1470                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1471                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1472                             dev->wiphy.ht_capa_mod_mask))
1473                         goto nla_put_failure;
1474
1475                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1476                     dev->wiphy.max_acl_mac_addrs &&
1477                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1478                                 dev->wiphy.max_acl_mac_addrs))
1479                         goto nla_put_failure;
1480
1481                 /*
1482                  * Any information below this point is only available to
1483                  * applications that can deal with it being split. This
1484                  * helps ensure that newly added capabilities don't break
1485                  * older tools by overrunning their buffers.
1486                  *
1487                  * We still increment split_start so that in the split
1488                  * case we'll continue with more data in the next round,
1489                  * but break unconditionally so unsplit data stops here.
1490                  */
1491                 (*split_start)++;
1492                 break;
1493         case 9:
1494                 if (dev->wiphy.extended_capabilities &&
1495                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1496                              dev->wiphy.extended_capabilities_len,
1497                              dev->wiphy.extended_capabilities) ||
1498                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1499                              dev->wiphy.extended_capabilities_len,
1500                              dev->wiphy.extended_capabilities_mask)))
1501                         goto nla_put_failure;
1502
1503                 if (dev->wiphy.vht_capa_mod_mask &&
1504                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1505                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1506                             dev->wiphy.vht_capa_mod_mask))
1507                         goto nla_put_failure;
1508
1509                 /* done */
1510                 *split_start = 0;
1511                 break;
1512         }
1513         return genlmsg_end(msg, hdr);
1514
1515  nla_put_failure:
1516         genlmsg_cancel(msg, hdr);
1517         return -EMSGSIZE;
1518 }
1519
1520 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1521 {
1522         int idx = 0, ret;
1523         int start = cb->args[0];
1524         struct cfg80211_registered_device *dev;
1525         s64 filter_wiphy = -1;
1526         bool split = false;
1527         struct nlattr **tb = nl80211_fam.attrbuf;
1528         int res;
1529
1530         rtnl_lock();
1531         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1532                           tb, nl80211_fam.maxattr, nl80211_policy);
1533         if (res == 0) {
1534                 split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1535                 if (tb[NL80211_ATTR_WIPHY])
1536                         filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1537                 if (tb[NL80211_ATTR_WDEV])
1538                         filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1539                 if (tb[NL80211_ATTR_IFINDEX]) {
1540                         struct net_device *netdev;
1541                         int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1542
1543                         netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1544                         if (!netdev) {
1545                                 rtnl_unlock();
1546                                 return -ENODEV;
1547                         }
1548                         if (netdev->ieee80211_ptr) {
1549                                 dev = wiphy_to_dev(
1550                                         netdev->ieee80211_ptr->wiphy);
1551                                 filter_wiphy = dev->wiphy_idx;
1552                         }
1553                         dev_put(netdev);
1554                 }
1555         }
1556
1557         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1558                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1559                         continue;
1560                 if (++idx <= start)
1561                         continue;
1562                 if (filter_wiphy != -1 && dev->wiphy_idx != filter_wiphy)
1563                         continue;
1564                 /* attempt to fit multiple wiphy data chunks into the skb */
1565                 do {
1566                         ret = nl80211_send_wiphy(dev, skb,
1567                                                  NETLINK_CB(cb->skb).portid,
1568                                                  cb->nlh->nlmsg_seq,
1569                                                  NLM_F_MULTI,
1570                                                  split, &cb->args[1],
1571                                                  &cb->args[2],
1572                                                  &cb->args[3]);
1573                         if (ret < 0) {
1574                                 /*
1575                                  * If sending the wiphy data didn't fit (ENOBUFS
1576                                  * or EMSGSIZE returned), this SKB is still
1577                                  * empty (so it's not too big because another
1578                                  * wiphy dataset is already in the skb) and
1579                                  * we've not tried to adjust the dump allocation
1580                                  * yet ... then adjust the alloc size to be
1581                                  * bigger, and return 1 but with the empty skb.
1582                                  * This results in an empty message being RX'ed
1583                                  * in userspace, but that is ignored.
1584                                  *
1585                                  * We can then retry with the larger buffer.
1586                                  */
1587                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1588                                     !skb->len &&
1589                                     cb->min_dump_alloc < 4096) {
1590                                         cb->min_dump_alloc = 4096;
1591                                         rtnl_unlock();
1592                                         return 1;
1593                                 }
1594                                 idx--;
1595                                 break;
1596                         }
1597                 } while (cb->args[1] > 0);
1598                 break;
1599         }
1600         rtnl_unlock();
1601
1602         cb->args[0] = idx;
1603
1604         return skb->len;
1605 }
1606
1607 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1608 {
1609         struct sk_buff *msg;
1610         struct cfg80211_registered_device *dev = info->user_ptr[0];
1611
1612         msg = nlmsg_new(4096, GFP_KERNEL);
1613         if (!msg)
1614                 return -ENOMEM;
1615
1616         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1617                                false, NULL, NULL, NULL) < 0) {
1618                 nlmsg_free(msg);
1619                 return -ENOBUFS;
1620         }
1621
1622         return genlmsg_reply(msg, info);
1623 }
1624
1625 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1626         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1627         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1628         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1629         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1630         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1631 };
1632
1633 static int parse_txq_params(struct nlattr *tb[],
1634                             struct ieee80211_txq_params *txq_params)
1635 {
1636         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1637             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1638             !tb[NL80211_TXQ_ATTR_AIFS])
1639                 return -EINVAL;
1640
1641         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1642         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1643         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1644         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1645         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1646
1647         if (txq_params->ac >= NL80211_NUM_ACS)
1648                 return -EINVAL;
1649
1650         return 0;
1651 }
1652
1653 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1654 {
1655         /*
1656          * You can only set the channel explicitly for WDS interfaces,
1657          * all others have their channel managed via their respective
1658          * "establish a connection" command (connect, join, ...)
1659          *
1660          * For AP/GO and mesh mode, the channel can be set with the
1661          * channel userspace API, but is only stored and passed to the
1662          * low-level driver when the AP starts or the mesh is joined.
1663          * This is for backward compatibility, userspace can also give
1664          * the channel in the start-ap or join-mesh commands instead.
1665          *
1666          * Monitors are special as they are normally slaved to
1667          * whatever else is going on, so they have their own special
1668          * operation to set the monitor channel if possible.
1669          */
1670         return !wdev ||
1671                 wdev->iftype == NL80211_IFTYPE_AP ||
1672                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1673                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1674                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1675 }
1676
1677 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1678                                  struct genl_info *info,
1679                                  struct cfg80211_chan_def *chandef)
1680 {
1681         u32 control_freq;
1682
1683         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1684                 return -EINVAL;
1685
1686         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1687
1688         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1689         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1690         chandef->center_freq1 = control_freq;
1691         chandef->center_freq2 = 0;
1692
1693         /* Primary channel not allowed */
1694         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1695                 return -EINVAL;
1696
1697         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1698                 enum nl80211_channel_type chantype;
1699
1700                 chantype = nla_get_u32(
1701                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1702
1703                 switch (chantype) {
1704                 case NL80211_CHAN_NO_HT:
1705                 case NL80211_CHAN_HT20:
1706                 case NL80211_CHAN_HT40PLUS:
1707                 case NL80211_CHAN_HT40MINUS:
1708                         cfg80211_chandef_create(chandef, chandef->chan,
1709                                                 chantype);
1710                         break;
1711                 default:
1712                         return -EINVAL;
1713                 }
1714         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1715                 chandef->width =
1716                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1717                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1718                         chandef->center_freq1 =
1719                                 nla_get_u32(
1720                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1721                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1722                         chandef->center_freq2 =
1723                                 nla_get_u32(
1724                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1725         }
1726
1727         if (!cfg80211_chandef_valid(chandef))
1728                 return -EINVAL;
1729
1730         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1731                                      IEEE80211_CHAN_DISABLED))
1732                 return -EINVAL;
1733
1734         return 0;
1735 }
1736
1737 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1738                                  struct wireless_dev *wdev,
1739                                  struct genl_info *info)
1740 {
1741         struct cfg80211_chan_def chandef;
1742         int result;
1743         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1744
1745         if (wdev)
1746                 iftype = wdev->iftype;
1747
1748         if (!nl80211_can_set_dev_channel(wdev))
1749                 return -EOPNOTSUPP;
1750
1751         result = nl80211_parse_chandef(rdev, info, &chandef);
1752         if (result)
1753                 return result;
1754
1755         switch (iftype) {
1756         case NL80211_IFTYPE_AP:
1757         case NL80211_IFTYPE_P2P_GO:
1758                 if (wdev->beacon_interval) {
1759                         result = -EBUSY;
1760                         break;
1761                 }
1762                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1763                         result = -EINVAL;
1764                         break;
1765                 }
1766                 wdev->preset_chandef = chandef;
1767                 result = 0;
1768                 break;
1769         case NL80211_IFTYPE_MESH_POINT:
1770                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1771                 break;
1772         case NL80211_IFTYPE_MONITOR:
1773                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1774                 break;
1775         default:
1776                 result = -EINVAL;
1777         }
1778
1779         return result;
1780 }
1781
1782 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1783 {
1784         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1785         struct net_device *netdev = info->user_ptr[1];
1786
1787         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1788 }
1789
1790 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1791 {
1792         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1793         struct net_device *dev = info->user_ptr[1];
1794         struct wireless_dev *wdev = dev->ieee80211_ptr;
1795         const u8 *bssid;
1796
1797         if (!info->attrs[NL80211_ATTR_MAC])
1798                 return -EINVAL;
1799
1800         if (netif_running(dev))
1801                 return -EBUSY;
1802
1803         if (!rdev->ops->set_wds_peer)
1804                 return -EOPNOTSUPP;
1805
1806         if (wdev->iftype != NL80211_IFTYPE_WDS)
1807                 return -EOPNOTSUPP;
1808
1809         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1810         return rdev_set_wds_peer(rdev, dev, bssid);
1811 }
1812
1813
1814 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1815 {
1816         struct cfg80211_registered_device *rdev;
1817         struct net_device *netdev = NULL;
1818         struct wireless_dev *wdev;
1819         int result = 0, rem_txq_params = 0;
1820         struct nlattr *nl_txq_params;
1821         u32 changed;
1822         u8 retry_short = 0, retry_long = 0;
1823         u32 frag_threshold = 0, rts_threshold = 0;
1824         u8 coverage_class = 0;
1825
1826         ASSERT_RTNL();
1827
1828         /*
1829          * Try to find the wiphy and netdev. Normally this
1830          * function shouldn't need the netdev, but this is
1831          * done for backward compatibility -- previously
1832          * setting the channel was done per wiphy, but now
1833          * it is per netdev. Previous userland like hostapd
1834          * also passed a netdev to set_wiphy, so that it is
1835          * possible to let that go to the right netdev!
1836          */
1837
1838         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1839                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1840
1841                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1842                 if (netdev && netdev->ieee80211_ptr)
1843                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1844                 else
1845                         netdev = NULL;
1846         }
1847
1848         if (!netdev) {
1849                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1850                                                   info->attrs);
1851                 if (IS_ERR(rdev))
1852                         return PTR_ERR(rdev);
1853                 wdev = NULL;
1854                 netdev = NULL;
1855                 result = 0;
1856         } else
1857                 wdev = netdev->ieee80211_ptr;
1858
1859         /*
1860          * end workaround code, by now the rdev is available
1861          * and locked, and wdev may or may not be NULL.
1862          */
1863
1864         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1865                 result = cfg80211_dev_rename(
1866                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1867
1868         if (result)
1869                 goto bad_res;
1870
1871         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1872                 struct ieee80211_txq_params txq_params;
1873                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1874
1875                 if (!rdev->ops->set_txq_params) {
1876                         result = -EOPNOTSUPP;
1877                         goto bad_res;
1878                 }
1879
1880                 if (!netdev) {
1881                         result = -EINVAL;
1882                         goto bad_res;
1883                 }
1884
1885                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1886                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1887                         result = -EINVAL;
1888                         goto bad_res;
1889                 }
1890
1891                 if (!netif_running(netdev)) {
1892                         result = -ENETDOWN;
1893                         goto bad_res;
1894                 }
1895
1896                 nla_for_each_nested(nl_txq_params,
1897                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1898                                     rem_txq_params) {
1899                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1900                                   nla_data(nl_txq_params),
1901                                   nla_len(nl_txq_params),
1902                                   txq_params_policy);
1903                         result = parse_txq_params(tb, &txq_params);
1904                         if (result)
1905                                 goto bad_res;
1906
1907                         result = rdev_set_txq_params(rdev, netdev,
1908                                                      &txq_params);
1909                         if (result)
1910                                 goto bad_res;
1911                 }
1912         }
1913
1914         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1915                 result = __nl80211_set_channel(rdev,
1916                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1917                                 info);
1918                 if (result)
1919                         goto bad_res;
1920         }
1921
1922         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1923                 struct wireless_dev *txp_wdev = wdev;
1924                 enum nl80211_tx_power_setting type;
1925                 int idx, mbm = 0;
1926
1927                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1928                         txp_wdev = NULL;
1929
1930                 if (!rdev->ops->set_tx_power) {
1931                         result = -EOPNOTSUPP;
1932                         goto bad_res;
1933                 }
1934
1935                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1936                 type = nla_get_u32(info->attrs[idx]);
1937
1938                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1939                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1940                         result = -EINVAL;
1941                         goto bad_res;
1942                 }
1943
1944                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1945                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1946                         mbm = nla_get_u32(info->attrs[idx]);
1947                 }
1948
1949                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1950                 if (result)
1951                         goto bad_res;
1952         }
1953
1954         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1955             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1956                 u32 tx_ant, rx_ant;
1957                 if ((!rdev->wiphy.available_antennas_tx &&
1958                      !rdev->wiphy.available_antennas_rx) ||
1959                     !rdev->ops->set_antenna) {
1960                         result = -EOPNOTSUPP;
1961                         goto bad_res;
1962                 }
1963
1964                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1965                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1966
1967                 /* reject antenna configurations which don't match the
1968                  * available antenna masks, except for the "all" mask */
1969                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1970                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1971                         result = -EINVAL;
1972                         goto bad_res;
1973                 }
1974
1975                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1976                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1977
1978                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1979                 if (result)
1980                         goto bad_res;
1981         }
1982
1983         changed = 0;
1984
1985         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1986                 retry_short = nla_get_u8(
1987                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1988                 if (retry_short == 0) {
1989                         result = -EINVAL;
1990                         goto bad_res;
1991                 }
1992                 changed |= WIPHY_PARAM_RETRY_SHORT;
1993         }
1994
1995         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1996                 retry_long = nla_get_u8(
1997                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1998                 if (retry_long == 0) {
1999                         result = -EINVAL;
2000                         goto bad_res;
2001                 }
2002                 changed |= WIPHY_PARAM_RETRY_LONG;
2003         }
2004
2005         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2006                 frag_threshold = nla_get_u32(
2007                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2008                 if (frag_threshold < 256) {
2009                         result = -EINVAL;
2010                         goto bad_res;
2011                 }
2012                 if (frag_threshold != (u32) -1) {
2013                         /*
2014                          * Fragments (apart from the last one) are required to
2015                          * have even length. Make the fragmentation code
2016                          * simpler by stripping LSB should someone try to use
2017                          * odd threshold value.
2018                          */
2019                         frag_threshold &= ~0x1;
2020                 }
2021                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2022         }
2023
2024         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2025                 rts_threshold = nla_get_u32(
2026                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2027                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2028         }
2029
2030         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2031                 coverage_class = nla_get_u8(
2032                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2033                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2034         }
2035
2036         if (changed) {
2037                 u8 old_retry_short, old_retry_long;
2038                 u32 old_frag_threshold, old_rts_threshold;
2039                 u8 old_coverage_class;
2040
2041                 if (!rdev->ops->set_wiphy_params) {
2042                         result = -EOPNOTSUPP;
2043                         goto bad_res;
2044                 }
2045
2046                 old_retry_short = rdev->wiphy.retry_short;
2047                 old_retry_long = rdev->wiphy.retry_long;
2048                 old_frag_threshold = rdev->wiphy.frag_threshold;
2049                 old_rts_threshold = rdev->wiphy.rts_threshold;
2050                 old_coverage_class = rdev->wiphy.coverage_class;
2051
2052                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2053                         rdev->wiphy.retry_short = retry_short;
2054                 if (changed & WIPHY_PARAM_RETRY_LONG)
2055                         rdev->wiphy.retry_long = retry_long;
2056                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2057                         rdev->wiphy.frag_threshold = frag_threshold;
2058                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2059                         rdev->wiphy.rts_threshold = rts_threshold;
2060                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2061                         rdev->wiphy.coverage_class = coverage_class;
2062
2063                 result = rdev_set_wiphy_params(rdev, changed);
2064                 if (result) {
2065                         rdev->wiphy.retry_short = old_retry_short;
2066                         rdev->wiphy.retry_long = old_retry_long;
2067                         rdev->wiphy.frag_threshold = old_frag_threshold;
2068                         rdev->wiphy.rts_threshold = old_rts_threshold;
2069                         rdev->wiphy.coverage_class = old_coverage_class;
2070                 }
2071         }
2072
2073  bad_res:
2074         if (netdev)
2075                 dev_put(netdev);
2076         return result;
2077 }
2078
2079 static inline u64 wdev_id(struct wireless_dev *wdev)
2080 {
2081         return (u64)wdev->identifier |
2082                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2083 }
2084
2085 static int nl80211_send_chandef(struct sk_buff *msg,
2086                                  struct cfg80211_chan_def *chandef)
2087 {
2088         WARN_ON(!cfg80211_chandef_valid(chandef));
2089
2090         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2091                         chandef->chan->center_freq))
2092                 return -ENOBUFS;
2093         switch (chandef->width) {
2094         case NL80211_CHAN_WIDTH_20_NOHT:
2095         case NL80211_CHAN_WIDTH_20:
2096         case NL80211_CHAN_WIDTH_40:
2097                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2098                                 cfg80211_get_chandef_type(chandef)))
2099                         return -ENOBUFS;
2100                 break;
2101         default:
2102                 break;
2103         }
2104         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2105                 return -ENOBUFS;
2106         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2107                 return -ENOBUFS;
2108         if (chandef->center_freq2 &&
2109             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2110                 return -ENOBUFS;
2111         return 0;
2112 }
2113
2114 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2115                               struct cfg80211_registered_device *rdev,
2116                               struct wireless_dev *wdev)
2117 {
2118         struct net_device *dev = wdev->netdev;
2119         void *hdr;
2120
2121         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2122         if (!hdr)
2123                 return -1;
2124
2125         if (dev &&
2126             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2127              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2128                 goto nla_put_failure;
2129
2130         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2131             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2132             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2133             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2134             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2135                         rdev->devlist_generation ^
2136                         (cfg80211_rdev_list_generation << 2)))
2137                 goto nla_put_failure;
2138
2139         if (rdev->ops->get_channel) {
2140                 int ret;
2141                 struct cfg80211_chan_def chandef;
2142
2143                 ret = rdev_get_channel(rdev, wdev, &chandef);
2144                 if (ret == 0) {
2145                         if (nl80211_send_chandef(msg, &chandef))
2146                                 goto nla_put_failure;
2147                 }
2148         }
2149
2150         if (wdev->ssid_len) {
2151                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2152                         goto nla_put_failure;
2153         }
2154
2155         return genlmsg_end(msg, hdr);
2156
2157  nla_put_failure:
2158         genlmsg_cancel(msg, hdr);
2159         return -EMSGSIZE;
2160 }
2161
2162 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2163 {
2164         int wp_idx = 0;
2165         int if_idx = 0;
2166         int wp_start = cb->args[0];
2167         int if_start = cb->args[1];
2168         struct cfg80211_registered_device *rdev;
2169         struct wireless_dev *wdev;
2170
2171         rtnl_lock();
2172         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2173                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2174                         continue;
2175                 if (wp_idx < wp_start) {
2176                         wp_idx++;
2177                         continue;
2178                 }
2179                 if_idx = 0;
2180
2181                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2182                         if (if_idx < if_start) {
2183                                 if_idx++;
2184                                 continue;
2185                         }
2186                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2187                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2188                                                rdev, wdev) < 0) {
2189                                 goto out;
2190                         }
2191                         if_idx++;
2192                 }
2193
2194                 wp_idx++;
2195         }
2196  out:
2197         rtnl_unlock();
2198
2199         cb->args[0] = wp_idx;
2200         cb->args[1] = if_idx;
2201
2202         return skb->len;
2203 }
2204
2205 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2206 {
2207         struct sk_buff *msg;
2208         struct cfg80211_registered_device *dev = info->user_ptr[0];
2209         struct wireless_dev *wdev = info->user_ptr[1];
2210
2211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2212         if (!msg)
2213                 return -ENOMEM;
2214
2215         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2216                                dev, wdev) < 0) {
2217                 nlmsg_free(msg);
2218                 return -ENOBUFS;
2219         }
2220
2221         return genlmsg_reply(msg, info);
2222 }
2223
2224 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2225         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2226         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2227         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2228         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2229         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2230         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2231 };
2232
2233 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2234 {
2235         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2236         int flag;
2237
2238         *mntrflags = 0;
2239
2240         if (!nla)
2241                 return -EINVAL;
2242
2243         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2244                              nla, mntr_flags_policy))
2245                 return -EINVAL;
2246
2247         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2248                 if (flags[flag])
2249                         *mntrflags |= (1<<flag);
2250
2251         return 0;
2252 }
2253
2254 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2255                                struct net_device *netdev, u8 use_4addr,
2256                                enum nl80211_iftype iftype)
2257 {
2258         if (!use_4addr) {
2259                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2260                         return -EBUSY;
2261                 return 0;
2262         }
2263
2264         switch (iftype) {
2265         case NL80211_IFTYPE_AP_VLAN:
2266                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2267                         return 0;
2268                 break;
2269         case NL80211_IFTYPE_STATION:
2270                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2271                         return 0;
2272                 break;
2273         default:
2274                 break;
2275         }
2276
2277         return -EOPNOTSUPP;
2278 }
2279
2280 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2281 {
2282         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2283         struct vif_params params;
2284         int err;
2285         enum nl80211_iftype otype, ntype;
2286         struct net_device *dev = info->user_ptr[1];
2287         u32 _flags, *flags = NULL;
2288         bool change = false;
2289
2290         memset(&params, 0, sizeof(params));
2291
2292         otype = ntype = dev->ieee80211_ptr->iftype;
2293
2294         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2295                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2296                 if (otype != ntype)
2297                         change = true;
2298                 if (ntype > NL80211_IFTYPE_MAX)
2299                         return -EINVAL;
2300         }
2301
2302         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2303                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2304
2305                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2306                         return -EINVAL;
2307                 if (netif_running(dev))
2308                         return -EBUSY;
2309
2310                 wdev_lock(wdev);
2311                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2312                              IEEE80211_MAX_MESH_ID_LEN);
2313                 wdev->mesh_id_up_len =
2314                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2315                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2316                        wdev->mesh_id_up_len);
2317                 wdev_unlock(wdev);
2318         }
2319
2320         if (info->attrs[NL80211_ATTR_4ADDR]) {
2321                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2322                 change = true;
2323                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2324                 if (err)
2325                         return err;
2326         } else {
2327                 params.use_4addr = -1;
2328         }
2329
2330         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2331                 if (ntype != NL80211_IFTYPE_MONITOR)
2332                         return -EINVAL;
2333                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2334                                           &_flags);
2335                 if (err)
2336                         return err;
2337
2338                 flags = &_flags;
2339                 change = true;
2340         }
2341
2342         if (flags && (*flags & NL80211_MNTR_FLAG_ACTIVE) &&
2343             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2344                 return -EOPNOTSUPP;
2345
2346         if (change)
2347                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2348         else
2349                 err = 0;
2350
2351         if (!err && params.use_4addr != -1)
2352                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2353
2354         return err;
2355 }
2356
2357 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2358 {
2359         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2360         struct vif_params params;
2361         struct wireless_dev *wdev;
2362         struct sk_buff *msg;
2363         int err;
2364         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2365         u32 flags;
2366
2367         memset(&params, 0, sizeof(params));
2368
2369         if (!info->attrs[NL80211_ATTR_IFNAME])
2370                 return -EINVAL;
2371
2372         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2373                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2374                 if (type > NL80211_IFTYPE_MAX)
2375                         return -EINVAL;
2376         }
2377
2378         if (!rdev->ops->add_virtual_intf ||
2379             !(rdev->wiphy.interface_modes & (1 << type)))
2380                 return -EOPNOTSUPP;
2381
2382         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2383                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2384                            ETH_ALEN);
2385                 if (!is_valid_ether_addr(params.macaddr))
2386                         return -EADDRNOTAVAIL;
2387         }
2388
2389         if (info->attrs[NL80211_ATTR_4ADDR]) {
2390                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2391                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2392                 if (err)
2393                         return err;
2394         }
2395
2396         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2397         if (!msg)
2398                 return -ENOMEM;
2399
2400         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2401                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2402                                   &flags);
2403
2404         if (!err && (flags & NL80211_MNTR_FLAG_ACTIVE) &&
2405             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2406                 return -EOPNOTSUPP;
2407
2408         wdev = rdev_add_virtual_intf(rdev,
2409                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2410                                 type, err ? NULL : &flags, &params);
2411         if (IS_ERR(wdev)) {
2412                 nlmsg_free(msg);
2413                 return PTR_ERR(wdev);
2414         }
2415
2416         switch (type) {
2417         case NL80211_IFTYPE_MESH_POINT:
2418                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2419                         break;
2420                 wdev_lock(wdev);
2421                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2422                              IEEE80211_MAX_MESH_ID_LEN);
2423                 wdev->mesh_id_up_len =
2424                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2425                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2426                        wdev->mesh_id_up_len);
2427                 wdev_unlock(wdev);
2428                 break;
2429         case NL80211_IFTYPE_P2P_DEVICE:
2430                 /*
2431                  * P2P Device doesn't have a netdev, so doesn't go
2432                  * through the netdev notifier and must be added here
2433                  */
2434                 mutex_init(&wdev->mtx);
2435                 INIT_LIST_HEAD(&wdev->event_list);
2436                 spin_lock_init(&wdev->event_lock);
2437                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2438                 spin_lock_init(&wdev->mgmt_registrations_lock);
2439
2440                 wdev->identifier = ++rdev->wdev_id;
2441                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2442                 rdev->devlist_generation++;
2443                 break;
2444         default:
2445                 break;
2446         }
2447
2448         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2449                                rdev, wdev) < 0) {
2450                 nlmsg_free(msg);
2451                 return -ENOBUFS;
2452         }
2453
2454         return genlmsg_reply(msg, info);
2455 }
2456
2457 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2458 {
2459         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2460         struct wireless_dev *wdev = info->user_ptr[1];
2461
2462         if (!rdev->ops->del_virtual_intf)
2463                 return -EOPNOTSUPP;
2464
2465         /*
2466          * If we remove a wireless device without a netdev then clear
2467          * user_ptr[1] so that nl80211_post_doit won't dereference it
2468          * to check if it needs to do dev_put(). Otherwise it crashes
2469          * since the wdev has been freed, unlike with a netdev where
2470          * we need the dev_put() for the netdev to really be freed.
2471          */
2472         if (!wdev->netdev)
2473                 info->user_ptr[1] = NULL;
2474
2475         return rdev_del_virtual_intf(rdev, wdev);
2476 }
2477
2478 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2479 {
2480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2481         struct net_device *dev = info->user_ptr[1];
2482         u16 noack_map;
2483
2484         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2485                 return -EINVAL;
2486
2487         if (!rdev->ops->set_noack_map)
2488                 return -EOPNOTSUPP;
2489
2490         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2491
2492         return rdev_set_noack_map(rdev, dev, noack_map);
2493 }
2494
2495 struct get_key_cookie {
2496         struct sk_buff *msg;
2497         int error;
2498         int idx;
2499 };
2500
2501 static void get_key_callback(void *c, struct key_params *params)
2502 {
2503         struct nlattr *key;
2504         struct get_key_cookie *cookie = c;
2505
2506         if ((params->key &&
2507              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2508                      params->key_len, params->key)) ||
2509             (params->seq &&
2510              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2511                      params->seq_len, params->seq)) ||
2512             (params->cipher &&
2513              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2514                          params->cipher)))
2515                 goto nla_put_failure;
2516
2517         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2518         if (!key)
2519                 goto nla_put_failure;
2520
2521         if ((params->key &&
2522              nla_put(cookie->msg, NL80211_KEY_DATA,
2523                      params->key_len, params->key)) ||
2524             (params->seq &&
2525              nla_put(cookie->msg, NL80211_KEY_SEQ,
2526                      params->seq_len, params->seq)) ||
2527             (params->cipher &&
2528              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2529                          params->cipher)))
2530                 goto nla_put_failure;
2531
2532         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2533                 goto nla_put_failure;
2534
2535         nla_nest_end(cookie->msg, key);
2536
2537         return;
2538  nla_put_failure:
2539         cookie->error = 1;
2540 }
2541
2542 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2543 {
2544         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2545         int err;
2546         struct net_device *dev = info->user_ptr[1];
2547         u8 key_idx = 0;
2548         const u8 *mac_addr = NULL;
2549         bool pairwise;
2550         struct get_key_cookie cookie = {
2551                 .error = 0,
2552         };
2553         void *hdr;
2554         struct sk_buff *msg;
2555
2556         if (info->attrs[NL80211_ATTR_KEY_IDX])
2557                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2558
2559         if (key_idx > 5)
2560                 return -EINVAL;
2561
2562         if (info->attrs[NL80211_ATTR_MAC])
2563                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2564
2565         pairwise = !!mac_addr;
2566         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2567                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2568                 if (kt >= NUM_NL80211_KEYTYPES)
2569                         return -EINVAL;
2570                 if (kt != NL80211_KEYTYPE_GROUP &&
2571                     kt != NL80211_KEYTYPE_PAIRWISE)
2572                         return -EINVAL;
2573                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2574         }
2575
2576         if (!rdev->ops->get_key)
2577                 return -EOPNOTSUPP;
2578
2579         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2580         if (!msg)
2581                 return -ENOMEM;
2582
2583         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2584                              NL80211_CMD_NEW_KEY);
2585         if (IS_ERR(hdr))
2586                 return PTR_ERR(hdr);
2587
2588         cookie.msg = msg;
2589         cookie.idx = key_idx;
2590
2591         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2592             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2593                 goto nla_put_failure;
2594         if (mac_addr &&
2595             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2596                 goto nla_put_failure;
2597
2598         if (pairwise && mac_addr &&
2599             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2600                 return -ENOENT;
2601
2602         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2603                            get_key_callback);
2604
2605         if (err)
2606                 goto free_msg;
2607
2608         if (cookie.error)
2609                 goto nla_put_failure;
2610
2611         genlmsg_end(msg, hdr);
2612         return genlmsg_reply(msg, info);
2613
2614  nla_put_failure:
2615         err = -ENOBUFS;
2616  free_msg:
2617         nlmsg_free(msg);
2618         return err;
2619 }
2620
2621 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2622 {
2623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2624         struct key_parse key;
2625         int err;
2626         struct net_device *dev = info->user_ptr[1];
2627
2628         err = nl80211_parse_key(info, &key);
2629         if (err)
2630                 return err;
2631
2632         if (key.idx < 0)
2633                 return -EINVAL;
2634
2635         /* only support setting default key */
2636         if (!key.def && !key.defmgmt)
2637                 return -EINVAL;
2638
2639         wdev_lock(dev->ieee80211_ptr);
2640
2641         if (key.def) {
2642                 if (!rdev->ops->set_default_key) {
2643                         err = -EOPNOTSUPP;
2644                         goto out;
2645                 }
2646
2647                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2648                 if (err)
2649                         goto out;
2650
2651                 err = rdev_set_default_key(rdev, dev, key.idx,
2652                                                  key.def_uni, key.def_multi);
2653
2654                 if (err)
2655                         goto out;
2656
2657 #ifdef CONFIG_CFG80211_WEXT
2658                 dev->ieee80211_ptr->wext.default_key = key.idx;
2659 #endif
2660         } else {
2661                 if (key.def_uni || !key.def_multi) {
2662                         err = -EINVAL;
2663                         goto out;
2664                 }
2665
2666                 if (!rdev->ops->set_default_mgmt_key) {
2667                         err = -EOPNOTSUPP;
2668                         goto out;
2669                 }
2670
2671                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2672                 if (err)
2673                         goto out;
2674
2675                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2676                 if (err)
2677                         goto out;
2678
2679 #ifdef CONFIG_CFG80211_WEXT
2680                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2681 #endif
2682         }
2683
2684  out:
2685         wdev_unlock(dev->ieee80211_ptr);
2686
2687         return err;
2688 }
2689
2690 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2691 {
2692         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2693         int err;
2694         struct net_device *dev = info->user_ptr[1];
2695         struct key_parse key;
2696         const u8 *mac_addr = NULL;
2697
2698         err = nl80211_parse_key(info, &key);
2699         if (err)
2700                 return err;
2701
2702         if (!key.p.key)
2703                 return -EINVAL;
2704
2705         if (info->attrs[NL80211_ATTR_MAC])
2706                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2707
2708         if (key.type == -1) {
2709                 if (mac_addr)
2710                         key.type = NL80211_KEYTYPE_PAIRWISE;
2711                 else
2712                         key.type = NL80211_KEYTYPE_GROUP;
2713         }
2714
2715         /* for now */
2716         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2717             key.type != NL80211_KEYTYPE_GROUP)
2718                 return -EINVAL;
2719
2720         if (!rdev->ops->add_key)
2721                 return -EOPNOTSUPP;
2722
2723         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2724                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2725                                            mac_addr))
2726                 return -EINVAL;
2727
2728         wdev_lock(dev->ieee80211_ptr);
2729         err = nl80211_key_allowed(dev->ieee80211_ptr);
2730         if (!err)
2731                 err = rdev_add_key(rdev, dev, key.idx,
2732                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2733                                     mac_addr, &key.p);
2734         wdev_unlock(dev->ieee80211_ptr);
2735
2736         return err;
2737 }
2738
2739 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2740 {
2741         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2742         int err;
2743         struct net_device *dev = info->user_ptr[1];
2744         u8 *mac_addr = NULL;
2745         struct key_parse key;
2746
2747         err = nl80211_parse_key(info, &key);
2748         if (err)
2749                 return err;
2750
2751         if (info->attrs[NL80211_ATTR_MAC])
2752                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2753
2754         if (key.type == -1) {
2755                 if (mac_addr)
2756                         key.type = NL80211_KEYTYPE_PAIRWISE;
2757                 else
2758                         key.type = NL80211_KEYTYPE_GROUP;
2759         }
2760
2761         /* for now */
2762         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2763             key.type != NL80211_KEYTYPE_GROUP)
2764                 return -EINVAL;
2765
2766         if (!rdev->ops->del_key)
2767                 return -EOPNOTSUPP;
2768
2769         wdev_lock(dev->ieee80211_ptr);
2770         err = nl80211_key_allowed(dev->ieee80211_ptr);
2771
2772         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2773             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2774                 err = -ENOENT;
2775
2776         if (!err)
2777                 err = rdev_del_key(rdev, dev, key.idx,
2778                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2779                                    mac_addr);
2780
2781 #ifdef CONFIG_CFG80211_WEXT
2782         if (!err) {
2783                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2784                         dev->ieee80211_ptr->wext.default_key = -1;
2785                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2786                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2787         }
2788 #endif
2789         wdev_unlock(dev->ieee80211_ptr);
2790
2791         return err;
2792 }
2793
2794 /* This function returns an error or the number of nested attributes */
2795 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2796 {
2797         struct nlattr *attr;
2798         int n_entries = 0, tmp;
2799
2800         nla_for_each_nested(attr, nl_attr, tmp) {
2801                 if (nla_len(attr) != ETH_ALEN)
2802                         return -EINVAL;
2803
2804                 n_entries++;
2805         }
2806
2807         return n_entries;
2808 }
2809
2810 /*
2811  * This function parses ACL information and allocates memory for ACL data.
2812  * On successful return, the calling function is responsible to free the
2813  * ACL buffer returned by this function.
2814  */
2815 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2816                                                 struct genl_info *info)
2817 {
2818         enum nl80211_acl_policy acl_policy;
2819         struct nlattr *attr;
2820         struct cfg80211_acl_data *acl;
2821         int i = 0, n_entries, tmp;
2822
2823         if (!wiphy->max_acl_mac_addrs)
2824                 return ERR_PTR(-EOPNOTSUPP);
2825
2826         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2827                 return ERR_PTR(-EINVAL);
2828
2829         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2830         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2831             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2832                 return ERR_PTR(-EINVAL);
2833
2834         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2835                 return ERR_PTR(-EINVAL);
2836
2837         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2838         if (n_entries < 0)
2839                 return ERR_PTR(n_entries);
2840
2841         if (n_entries > wiphy->max_acl_mac_addrs)
2842                 return ERR_PTR(-ENOTSUPP);
2843
2844         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2845                       GFP_KERNEL);
2846         if (!acl)
2847                 return ERR_PTR(-ENOMEM);
2848
2849         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2850                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2851                 i++;
2852         }
2853
2854         acl->n_acl_entries = n_entries;
2855         acl->acl_policy = acl_policy;
2856
2857         return acl;
2858 }
2859
2860 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2861 {
2862         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2863         struct net_device *dev = info->user_ptr[1];
2864         struct cfg80211_acl_data *acl;
2865         int err;
2866
2867         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2868             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2869                 return -EOPNOTSUPP;
2870
2871         if (!dev->ieee80211_ptr->beacon_interval)
2872                 return -EINVAL;
2873
2874         acl = parse_acl_data(&rdev->wiphy, info);
2875         if (IS_ERR(acl))
2876                 return PTR_ERR(acl);
2877
2878         err = rdev_set_mac_acl(rdev, dev, acl);
2879
2880         kfree(acl);
2881
2882         return err;
2883 }
2884
2885 static int nl80211_parse_beacon(struct genl_info *info,
2886                                 struct cfg80211_beacon_data *bcn)
2887 {
2888         bool haveinfo = false;
2889
2890         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2891             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2892             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2893             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2894                 return -EINVAL;
2895
2896         memset(bcn, 0, sizeof(*bcn));
2897
2898         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2899                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2900                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2901                 if (!bcn->head_len)
2902                         return -EINVAL;
2903                 haveinfo = true;
2904         }
2905
2906         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2907                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2908                 bcn->tail_len =
2909                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2910                 haveinfo = true;
2911         }
2912
2913         if (!haveinfo)
2914                 return -EINVAL;
2915
2916         if (info->attrs[NL80211_ATTR_IE]) {
2917                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2918                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2919         }
2920
2921         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2922                 bcn->proberesp_ies =
2923                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2924                 bcn->proberesp_ies_len =
2925                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2926         }
2927
2928         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2929                 bcn->assocresp_ies =
2930                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2931                 bcn->assocresp_ies_len =
2932                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2933         }
2934
2935         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2936                 bcn->probe_resp =
2937                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2938                 bcn->probe_resp_len =
2939                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2940         }
2941
2942         return 0;
2943 }
2944
2945 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2946                                    struct cfg80211_ap_settings *params)
2947 {
2948         struct wireless_dev *wdev;
2949         bool ret = false;
2950
2951         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2952                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2953                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2954                         continue;
2955
2956                 if (!wdev->preset_chandef.chan)
2957                         continue;
2958
2959                 params->chandef = wdev->preset_chandef;
2960                 ret = true;
2961                 break;
2962         }
2963
2964         return ret;
2965 }
2966
2967 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2968                                     enum nl80211_auth_type auth_type,
2969                                     enum nl80211_commands cmd)
2970 {
2971         if (auth_type > NL80211_AUTHTYPE_MAX)
2972                 return false;
2973
2974         switch (cmd) {
2975         case NL80211_CMD_AUTHENTICATE:
2976                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2977                     auth_type == NL80211_AUTHTYPE_SAE)
2978                         return false;
2979                 return true;
2980         case NL80211_CMD_CONNECT:
2981         case NL80211_CMD_START_AP:
2982                 /* SAE not supported yet */
2983                 if (auth_type == NL80211_AUTHTYPE_SAE)
2984                         return false;
2985                 return true;
2986         default:
2987                 return false;
2988         }
2989 }
2990
2991 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2992 {
2993         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2994         struct net_device *dev = info->user_ptr[1];
2995         struct wireless_dev *wdev = dev->ieee80211_ptr;
2996         struct cfg80211_ap_settings params;
2997         int err;
2998         u8 radar_detect_width = 0;
2999
3000         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3001             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3002                 return -EOPNOTSUPP;
3003
3004         if (!rdev->ops->start_ap)
3005                 return -EOPNOTSUPP;
3006
3007         if (wdev->beacon_interval)
3008                 return -EALREADY;
3009
3010         memset(&params, 0, sizeof(params));
3011
3012         /* these are required for START_AP */
3013         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3014             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3015             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3016                 return -EINVAL;
3017
3018         err = nl80211_parse_beacon(info, &params.beacon);
3019         if (err)
3020                 return err;
3021
3022         params.beacon_interval =
3023                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3024         params.dtim_period =
3025                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3026
3027         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3028         if (err)
3029                 return err;
3030
3031         /*
3032          * In theory, some of these attributes should be required here
3033          * but since they were not used when the command was originally
3034          * added, keep them optional for old user space programs to let
3035          * them continue to work with drivers that do not need the
3036          * additional information -- drivers must check!
3037          */
3038         if (info->attrs[NL80211_ATTR_SSID]) {
3039                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3040                 params.ssid_len =
3041                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3042                 if (params.ssid_len == 0 ||
3043                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3044                         return -EINVAL;
3045         }
3046
3047         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3048                 params.hidden_ssid = nla_get_u32(
3049                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3050                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3051                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3052                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3053                         return -EINVAL;
3054         }
3055
3056         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3057
3058         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3059                 params.auth_type = nla_get_u32(
3060                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3061                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3062                                              NL80211_CMD_START_AP))
3063                         return -EINVAL;
3064         } else
3065                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3066
3067         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3068                                       NL80211_MAX_NR_CIPHER_SUITES);
3069         if (err)
3070                 return err;
3071
3072         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3073                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3074                         return -EOPNOTSUPP;
3075                 params.inactivity_timeout = nla_get_u16(
3076                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3077         }
3078
3079         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3080                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3081                         return -EINVAL;
3082                 params.p2p_ctwindow =
3083                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3084                 if (params.p2p_ctwindow > 127)
3085                         return -EINVAL;
3086                 if (params.p2p_ctwindow != 0 &&
3087                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3088                         return -EINVAL;
3089         }
3090
3091         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3092                 u8 tmp;
3093
3094                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3095                         return -EINVAL;
3096                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3097                 if (tmp > 1)
3098                         return -EINVAL;
3099                 params.p2p_opp_ps = tmp;
3100                 if (params.p2p_opp_ps != 0 &&
3101                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3102                         return -EINVAL;
3103         }
3104
3105         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3106                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3107                 if (err)
3108                         return err;
3109         } else if (wdev->preset_chandef.chan) {
3110                 params.chandef = wdev->preset_chandef;
3111         } else if (!nl80211_get_ap_channel(rdev, &params))
3112                 return -EINVAL;
3113
3114         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3115                 return -EINVAL;
3116
3117         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3118         if (err < 0)
3119                 return err;
3120         if (err) {
3121                 radar_detect_width = BIT(params.chandef.width);
3122                 params.radar_required = true;
3123         }
3124
3125         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3126                                            params.chandef.chan,
3127                                            CHAN_MODE_SHARED,
3128                                            radar_detect_width);
3129         if (err)
3130                 return err;
3131
3132         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3133                 params.acl = parse_acl_data(&rdev->wiphy, info);
3134                 if (IS_ERR(params.acl))
3135                         return PTR_ERR(params.acl);
3136         }
3137
3138         err = rdev_start_ap(rdev, dev, &params);
3139         if (!err) {
3140                 wdev->preset_chandef = params.chandef;
3141                 wdev->beacon_interval = params.beacon_interval;
3142                 wdev->channel = params.chandef.chan;
3143                 wdev->ssid_len = params.ssid_len;
3144                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3145         }
3146
3147         kfree(params.acl);
3148
3149         return err;
3150 }
3151
3152 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3153 {
3154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3155         struct net_device *dev = info->user_ptr[1];
3156         struct wireless_dev *wdev = dev->ieee80211_ptr;
3157         struct cfg80211_beacon_data params;
3158         int err;
3159
3160         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3161             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3162                 return -EOPNOTSUPP;
3163
3164         if (!rdev->ops->change_beacon)
3165                 return -EOPNOTSUPP;
3166
3167         if (!wdev->beacon_interval)
3168                 return -EINVAL;
3169
3170         err = nl80211_parse_beacon(info, &params);
3171         if (err)
3172                 return err;
3173
3174         return rdev_change_beacon(rdev, dev, &params);
3175 }
3176
3177 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3178 {
3179         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3180         struct net_device *dev = info->user_ptr[1];
3181
3182         return cfg80211_stop_ap(rdev, dev);
3183 }
3184
3185 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3186         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3187         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3188         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3189         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3190         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3191         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3192 };
3193
3194 static int parse_station_flags(struct genl_info *info,
3195                                enum nl80211_iftype iftype,
3196                                struct station_parameters *params)
3197 {
3198         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3199         struct nlattr *nla;
3200         int flag;
3201
3202         /*
3203          * Try parsing the new attribute first so userspace
3204          * can specify both for older kernels.
3205          */
3206         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3207         if (nla) {
3208                 struct nl80211_sta_flag_update *sta_flags;
3209
3210                 sta_flags = nla_data(nla);
3211                 params->sta_flags_mask = sta_flags->mask;
3212                 params->sta_flags_set = sta_flags->set;
3213                 params->sta_flags_set &= params->sta_flags_mask;
3214                 if ((params->sta_flags_mask |
3215                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3216                         return -EINVAL;
3217                 return 0;
3218         }
3219
3220         /* if present, parse the old attribute */
3221
3222         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3223         if (!nla)
3224                 return 0;
3225
3226         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3227                              nla, sta_flags_policy))
3228                 return -EINVAL;
3229
3230         /*
3231          * Only allow certain flags for interface types so that
3232          * other attributes are silently ignored. Remember that
3233          * this is backward compatibility code with old userspace
3234          * and shouldn't be hit in other cases anyway.
3235          */
3236         switch (iftype) {
3237         case NL80211_IFTYPE_AP:
3238         case NL80211_IFTYPE_AP_VLAN:
3239         case NL80211_IFTYPE_P2P_GO:
3240                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3241                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3242                                          BIT(NL80211_STA_FLAG_WME) |
3243                                          BIT(NL80211_STA_FLAG_MFP);
3244                 break;
3245         case NL80211_IFTYPE_P2P_CLIENT:
3246         case NL80211_IFTYPE_STATION:
3247                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3248                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3249                 break;
3250         case NL80211_IFTYPE_MESH_POINT:
3251                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3252                                          BIT(NL80211_STA_FLAG_MFP) |
3253                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3254         default:
3255                 return -EINVAL;
3256         }
3257
3258         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3259                 if (flags[flag]) {
3260                         params->sta_flags_set |= (1<<flag);
3261
3262                         /* no longer support new API additions in old API */
3263                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3264                                 return -EINVAL;
3265                 }
3266         }
3267
3268         return 0;
3269 }
3270
3271 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3272                                  int attr)
3273 {
3274         struct nlattr *rate;
3275         u32 bitrate;
3276         u16 bitrate_compat;
3277
3278         rate = nla_nest_start(msg, attr);
3279         if (!rate)
3280                 return false;
3281
3282         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3283         bitrate = cfg80211_calculate_bitrate(info);
3284         /* report 16-bit bitrate only if we can */
3285         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3286         if (bitrate > 0 &&
3287             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3288                 return false;
3289         if (bitrate_compat > 0 &&
3290             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3291                 return false;
3292
3293         if (info->flags & RATE_INFO_FLAGS_MCS) {
3294                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3295                         return false;
3296                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3297                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3298                         return false;
3299                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3300                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3301                         return false;
3302         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3303                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3304                         return false;
3305                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3306                         return false;
3307                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3308                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3309                         return false;
3310                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3311                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3312                         return false;
3313                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3314                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3315                         return false;
3316                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3317                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3318                         return false;
3319                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3320                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3321                         return false;
3322         }
3323
3324         nla_nest_end(msg, rate);
3325         return true;
3326 }
3327
3328 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3329                                int id)
3330 {
3331         void *attr;
3332         int i = 0;
3333
3334         if (!mask)
3335                 return true;
3336
3337         attr = nla_nest_start(msg, id);
3338         if (!attr)
3339                 return false;
3340
3341         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3342                 if (!(mask & BIT(i)))
3343                         continue;
3344
3345                 if (nla_put_u8(msg, i, signal[i]))
3346                         return false;
3347         }
3348
3349         nla_nest_end(msg, attr);
3350
3351         return true;
3352 }
3353
3354 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3355                                 int flags,
3356                                 struct cfg80211_registered_device *rdev,
3357                                 struct net_device *dev,
3358                                 const u8 *mac_addr, struct station_info *sinfo)
3359 {
3360         void *hdr;
3361         struct nlattr *sinfoattr, *bss_param;
3362
3363         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3364         if (!hdr)
3365                 return -1;
3366
3367         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3368             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3369             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3370                 goto nla_put_failure;
3371
3372         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3373         if (!sinfoattr)
3374                 goto nla_put_failure;
3375         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3376             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3377                         sinfo->connected_time))
3378                 goto nla_put_failure;
3379         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3380             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3381                         sinfo->inactive_time))
3382                 goto nla_put_failure;
3383         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3384                               STATION_INFO_RX_BYTES64)) &&
3385             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3386                         (u32)sinfo->rx_bytes))
3387                 goto nla_put_failure;
3388         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3389                               STATION_INFO_TX_BYTES64)) &&
3390             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3391                         (u32)sinfo->tx_bytes))
3392                 goto nla_put_failure;
3393         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3394             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3395                         sinfo->rx_bytes))
3396                 goto nla_put_failure;
3397         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3398             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3399                         sinfo->tx_bytes))
3400                 goto nla_put_failure;
3401         if ((sinfo->filled & STATION_INFO_LLID) &&
3402             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3403                 goto nla_put_failure;
3404         if ((sinfo->filled & STATION_INFO_PLID) &&
3405             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3406                 goto nla_put_failure;
3407         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3408             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3409                        sinfo->plink_state))
3410                 goto nla_put_failure;
3411         switch (rdev->wiphy.signal_type) {
3412         case CFG80211_SIGNAL_TYPE_MBM:
3413                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3414                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3415                                sinfo->signal))
3416                         goto nla_put_failure;
3417                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3418                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3419                                sinfo->signal_avg))
3420                         goto nla_put_failure;
3421                 break;
3422         default:
3423                 break;
3424         }
3425         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3426                 if (!nl80211_put_signal(msg, sinfo->chains,
3427                                         sinfo->chain_signal,
3428                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3429                         goto nla_put_failure;
3430         }
3431         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3432                 if (!nl80211_put_signal(msg, sinfo->chains,
3433                                         sinfo->chain_signal_avg,
3434                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3435                         goto nla_put_failure;
3436         }
3437         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3438                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3439                                           NL80211_STA_INFO_TX_BITRATE))
3440                         goto nla_put_failure;
3441         }
3442         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3443                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3444                                           NL80211_STA_INFO_RX_BITRATE))
3445                         goto nla_put_failure;
3446         }
3447         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3448             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3449                         sinfo->rx_packets))
3450                 goto nla_put_failure;
3451         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3452             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3453                         sinfo->tx_packets))
3454                 goto nla_put_failure;
3455         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3456             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3457                         sinfo->tx_retries))
3458                 goto nla_put_failure;
3459         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3460             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3461                         sinfo->tx_failed))
3462                 goto nla_put_failure;
3463         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3464             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3465                         sinfo->beacon_loss_count))
3466                 goto nla_put_failure;
3467         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3468             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3469                         sinfo->local_pm))
3470                 goto nla_put_failure;
3471         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3472             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3473                         sinfo->peer_pm))
3474                 goto nla_put_failure;
3475         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3476             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3477                         sinfo->nonpeer_pm))
3478                 goto nla_put_failure;
3479         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3480                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3481                 if (!bss_param)
3482                         goto nla_put_failure;
3483
3484                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3485                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3486                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3487                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3488                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3489                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3490                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3491                                sinfo->bss_param.dtim_period) ||
3492                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3493                                 sinfo->bss_param.beacon_interval))
3494                         goto nla_put_failure;
3495
3496                 nla_nest_end(msg, bss_param);
3497         }
3498         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3499             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3500                     sizeof(struct nl80211_sta_flag_update),
3501                     &sinfo->sta_flags))
3502                 goto nla_put_failure;
3503         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3504                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3505                             sinfo->t_offset))
3506                 goto nla_put_failure;
3507         nla_nest_end(msg, sinfoattr);
3508
3509         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3510             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3511                     sinfo->assoc_req_ies))
3512                 goto nla_put_failure;
3513
3514         return genlmsg_end(msg, hdr);
3515
3516  nla_put_failure:
3517         genlmsg_cancel(msg, hdr);
3518         return -EMSGSIZE;
3519 }
3520
3521 static int nl80211_dump_station(struct sk_buff *skb,
3522                                 struct netlink_callback *cb)
3523 {
3524         struct station_info sinfo;
3525         struct cfg80211_registered_device *dev;
3526         struct wireless_dev *wdev;
3527         u8 mac_addr[ETH_ALEN];
3528         int sta_idx = cb->args[2];
3529         int err;
3530
3531         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3532         if (err)
3533                 return err;
3534
3535         if (!wdev->netdev) {
3536                 err = -EINVAL;
3537                 goto out_err;
3538         }
3539
3540         if (!dev->ops->dump_station) {
3541                 err = -EOPNOTSUPP;
3542                 goto out_err;
3543         }
3544
3545         while (1) {
3546                 memset(&sinfo, 0, sizeof(sinfo));
3547                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3548                                         mac_addr, &sinfo);
3549                 if (err == -ENOENT)
3550                         break;
3551                 if (err)
3552                         goto out_err;
3553
3554                 if (nl80211_send_station(skb,
3555                                 NETLINK_CB(cb->skb).portid,
3556                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3557                                 dev, wdev->netdev, mac_addr,
3558                                 &sinfo) < 0)
3559                         goto out;
3560
3561                 sta_idx++;
3562         }
3563
3564
3565  out:
3566         cb->args[2] = sta_idx;
3567         err = skb->len;
3568  out_err:
3569         nl80211_finish_wdev_dump(dev);
3570
3571         return err;
3572 }
3573
3574 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3575 {
3576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3577         struct net_device *dev = info->user_ptr[1];
3578         struct station_info sinfo;
3579         struct sk_buff *msg;
3580         u8 *mac_addr = NULL;
3581         int err;
3582
3583         memset(&sinfo, 0, sizeof(sinfo));
3584
3585         if (!info->attrs[NL80211_ATTR_MAC])
3586                 return -EINVAL;
3587
3588         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3589
3590         if (!rdev->ops->get_station)
3591                 return -EOPNOTSUPP;
3592
3593         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3594         if (err)
3595                 return err;
3596
3597         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3598         if (!msg)
3599                 return -ENOMEM;
3600
3601         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3602                                  rdev, dev, mac_addr, &sinfo) < 0) {
3603                 nlmsg_free(msg);
3604                 return -ENOBUFS;
3605         }
3606
3607         return genlmsg_reply(msg, info);
3608 }
3609
3610 int cfg80211_check_station_change(struct wiphy *wiphy,
3611                                   struct station_parameters *params,
3612                                   enum cfg80211_station_type statype)
3613 {
3614         if (params->listen_interval != -1)
3615                 return -EINVAL;
3616         if (params->aid)
3617                 return -EINVAL;
3618
3619         /* When you run into this, adjust the code below for the new flag */
3620         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3621
3622         switch (statype) {
3623         case CFG80211_STA_MESH_PEER_KERNEL:
3624         case CFG80211_STA_MESH_PEER_USER:
3625                 /*
3626                  * No ignoring the TDLS flag here -- the userspace mesh
3627                  * code doesn't have the bug of including TDLS in the
3628                  * mask everywhere.
3629                  */
3630                 if (params->sta_flags_mask &
3631                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3632                                   BIT(NL80211_STA_FLAG_MFP) |
3633                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3634                         return -EINVAL;
3635                 break;
3636         case CFG80211_STA_TDLS_PEER_SETUP:
3637         case CFG80211_STA_TDLS_PEER_ACTIVE:
3638                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3639                         return -EINVAL;
3640                 /* ignore since it can't change */
3641                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3642                 break;
3643         default:
3644                 /* disallow mesh-specific things */
3645                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3646                         return -EINVAL;
3647                 if (params->local_pm)
3648                         return -EINVAL;
3649                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3650                         return -EINVAL;
3651         }
3652
3653         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3654             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3655                 /* TDLS can't be set, ... */
3656                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3657                         return -EINVAL;
3658                 /*
3659                  * ... but don't bother the driver with it. This works around
3660                  * a hostapd/wpa_supplicant issue -- it always includes the
3661                  * TLDS_PEER flag in the mask even for AP mode.
3662                  */
3663                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3664         }
3665
3666         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3667                 /* reject other things that can't change */
3668                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3669                         return -EINVAL;
3670                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3671                         return -EINVAL;
3672                 if (params->supported_rates)
3673                         return -EINVAL;
3674                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3675                         return -EINVAL;
3676         }
3677
3678         if (statype != CFG80211_STA_AP_CLIENT) {
3679                 if (params->vlan)
3680                         return -EINVAL;
3681         }
3682
3683         switch (statype) {
3684         case CFG80211_STA_AP_MLME_CLIENT:
3685                 /* Use this only for authorizing/unauthorizing a station */
3686                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3687                         return -EOPNOTSUPP;
3688                 break;
3689         case CFG80211_STA_AP_CLIENT:
3690                 /* accept only the listed bits */
3691                 if (params->sta_flags_mask &
3692                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3693                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3694                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3695                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3696                                   BIT(NL80211_STA_FLAG_WME) |
3697                                   BIT(NL80211_STA_FLAG_MFP)))
3698                         return -EINVAL;
3699
3700                 /* but authenticated/associated only if driver handles it */
3701                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3702                     params->sta_flags_mask &
3703                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3704                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3705                         return -EINVAL;
3706                 break;
3707         case CFG80211_STA_IBSS:
3708         case CFG80211_STA_AP_STA:
3709                 /* reject any changes other than AUTHORIZED */
3710                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3711                         return -EINVAL;
3712                 break;
3713         case CFG80211_STA_TDLS_PEER_SETUP:
3714                 /* reject any changes other than AUTHORIZED or WME */
3715                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3716                                                BIT(NL80211_STA_FLAG_WME)))
3717                         return -EINVAL;
3718                 /* force (at least) rates when authorizing */
3719                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3720                     !params->supported_rates)
3721                         return -EINVAL;
3722                 break;
3723         case CFG80211_STA_TDLS_PEER_ACTIVE:
3724                 /* reject any changes */
3725                 return -EINVAL;
3726         case CFG80211_STA_MESH_PEER_KERNEL:
3727                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3728                         return -EINVAL;
3729                 break;
3730         case CFG80211_STA_MESH_PEER_USER:
3731                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3732                         return -EINVAL;
3733                 break;
3734         }
3735
3736         return 0;
3737 }
3738 EXPORT_SYMBOL(cfg80211_check_station_change);
3739
3740 /*
3741  * Get vlan interface making sure it is running and on the right wiphy.
3742  */
3743 static struct net_device *get_vlan(struct genl_info *info,
3744                                    struct cfg80211_registered_device *rdev)
3745 {
3746         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3747         struct net_device *v;
3748         int ret;
3749
3750         if (!vlanattr)
3751                 return NULL;
3752
3753         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3754         if (!v)
3755                 return ERR_PTR(-ENODEV);
3756
3757         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3758                 ret = -EINVAL;
3759                 goto error;
3760         }
3761
3762         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3763             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3764             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3765                 ret = -EINVAL;
3766                 goto error;
3767         }
3768
3769         if (!netif_running(v)) {
3770                 ret = -ENETDOWN;
3771                 goto error;
3772         }
3773
3774         return v;
3775  error:
3776         dev_put(v);
3777         return ERR_PTR(ret);
3778 }
3779
3780 static struct nla_policy
3781 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3782         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3783         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3784 };
3785
3786 static int nl80211_parse_sta_wme(struct genl_info *info,
3787                                  struct station_parameters *params)
3788 {
3789         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3790         struct nlattr *nla;
3791         int err;
3792
3793         /* parse WME attributes if present */
3794         if (!info->attrs[NL80211_ATTR_STA_WME])
3795                 return 0;
3796
3797         nla = info->attrs[NL80211_ATTR_STA_WME];
3798         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3799                                nl80211_sta_wme_policy);
3800         if (err)
3801                 return err;
3802
3803         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3804                 params->uapsd_queues = nla_get_u8(
3805                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3806         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3807                 return -EINVAL;
3808
3809         if (tb[NL80211_STA_WME_MAX_SP])
3810                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3811
3812         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3813                 return -EINVAL;
3814
3815         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3816
3817         return 0;
3818 }
3819
3820 static int nl80211_set_station_tdls(struct genl_info *info,
3821                                     struct station_parameters *params)
3822 {
3823         /* Dummy STA entry gets updated once the peer capabilities are known */
3824         if (info->attrs[NL80211_ATTR_PEER_AID])
3825                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3826         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3827                 params->ht_capa =
3828                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3829         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3830                 params->vht_capa =
3831                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3832
3833         return nl80211_parse_sta_wme(info, params);
3834 }
3835
3836 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3837 {
3838         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3839         struct net_device *dev = info->user_ptr[1];
3840         struct station_parameters params;
3841         u8 *mac_addr;
3842         int err;
3843
3844         memset(&params, 0, sizeof(params));
3845
3846         params.listen_interval = -1;
3847
3848         if (!rdev->ops->change_station)
3849                 return -EOPNOTSUPP;
3850
3851         if (info->attrs[NL80211_ATTR_STA_AID])
3852                 return -EINVAL;
3853
3854         if (!info->attrs[NL80211_ATTR_MAC])
3855                 return -EINVAL;
3856
3857         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3858
3859         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3860                 params.supported_rates =
3861                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3862                 params.supported_rates_len =
3863                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3864         }
3865
3866         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3867                 params.capability =
3868                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3869                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3870         }
3871
3872         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3873                 params.ext_capab =
3874                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3875                 params.ext_capab_len =
3876                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3877         }
3878
3879         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3880                 return -EINVAL;
3881
3882         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3883                 return -EINVAL;
3884
3885         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3886                 params.plink_action =
3887                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3888                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3889                         return -EINVAL;
3890         }
3891
3892         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3893                 params.plink_state =
3894                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3895                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3896                         return -EINVAL;
3897                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3898         }
3899
3900         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3901                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3902                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3903
3904                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3905                     pm > NL80211_MESH_POWER_MAX)
3906                         return -EINVAL;
3907
3908                 params.local_pm = pm;
3909         }
3910
3911         /* Include parameters for TDLS peer (will check later) */
3912         err = nl80211_set_station_tdls(info, &params);
3913         if (err)
3914                 return err;
3915
3916         params.vlan = get_vlan(info, rdev);
3917         if (IS_ERR(params.vlan))
3918                 return PTR_ERR(params.vlan);
3919
3920         switch (dev->ieee80211_ptr->iftype) {
3921         case NL80211_IFTYPE_AP:
3922         case NL80211_IFTYPE_AP_VLAN:
3923         case NL80211_IFTYPE_P2P_GO:
3924         case NL80211_IFTYPE_P2P_CLIENT:
3925         case NL80211_IFTYPE_STATION:
3926         case NL80211_IFTYPE_ADHOC:
3927         case NL80211_IFTYPE_MESH_POINT:
3928                 break;
3929         default:
3930                 err = -EOPNOTSUPP;
3931                 goto out_put_vlan;
3932         }
3933
3934         /* driver will call cfg80211_check_station_change() */
3935         err = rdev_change_station(rdev, dev, mac_addr, &params);
3936
3937  out_put_vlan:
3938         if (params.vlan)
3939                 dev_put(params.vlan);
3940
3941         return err;
3942 }
3943
3944 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3945 {
3946         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3947         int err;
3948         struct net_device *dev = info->user_ptr[1];
3949         struct station_parameters params;
3950         u8 *mac_addr = NULL;
3951
3952         memset(&params, 0, sizeof(params));
3953
3954         if (!rdev->ops->add_station)
3955                 return -EOPNOTSUPP;
3956
3957         if (!info->attrs[NL80211_ATTR_MAC])
3958                 return -EINVAL;
3959
3960         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3961                 return -EINVAL;
3962
3963         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3964                 return -EINVAL;
3965
3966         if (!info->attrs[NL80211_ATTR_STA_AID] &&
3967             !info->attrs[NL80211_ATTR_PEER_AID])
3968                 return -EINVAL;
3969
3970         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3971         params.supported_rates =
3972                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3973         params.supported_rates_len =
3974                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3975         params.listen_interval =
3976                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3977
3978         if (info->attrs[NL80211_ATTR_PEER_AID])
3979                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3980         else
3981                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3982         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3983                 return -EINVAL;
3984
3985         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3986                 params.capability =
3987                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3988                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3989         }
3990
3991         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3992                 params.ext_capab =
3993                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3994                 params.ext_capab_len =
3995                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3996         }
3997
3998         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3999                 params.ht_capa =
4000                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4001
4002         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4003                 params.vht_capa =
4004                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4005
4006         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4007                 params.plink_action =
4008                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4009                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4010                         return -EINVAL;
4011         }
4012
4013         err = nl80211_parse_sta_wme(info, &params);
4014         if (err)
4015                 return err;
4016
4017         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4018                 return -EINVAL;
4019
4020         /* When you run into this, adjust the code below for the new flag */
4021         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4022
4023         switch (dev->ieee80211_ptr->iftype) {
4024         case NL80211_IFTYPE_AP:
4025         case NL80211_IFTYPE_AP_VLAN:
4026         case NL80211_IFTYPE_P2P_GO:
4027                 /* ignore WME attributes if iface/sta is not capable */
4028                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4029                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4030                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4031
4032                 /* TDLS peers cannot be added */
4033                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4034                     info->attrs[NL80211_ATTR_PEER_AID])
4035                         return -EINVAL;
4036                 /* but don't bother the driver with it */
4037                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4038
4039                 /* allow authenticated/associated only if driver handles it */
4040                 if (!(rdev->wiphy.features &
4041                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4042                     params.sta_flags_mask &
4043                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4044                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4045                         return -EINVAL;
4046
4047                 /* must be last in here for error handling */
4048                 params.vlan = get_vlan(info, rdev);
4049                 if (IS_ERR(params.vlan))
4050                         return PTR_ERR(params.vlan);
4051                 break;
4052         case NL80211_IFTYPE_MESH_POINT:
4053                 /* ignore uAPSD data */
4054                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4055
4056                 /* associated is disallowed */
4057                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4058                         return -EINVAL;
4059                 /* TDLS peers cannot be added */
4060                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4061                     info->attrs[NL80211_ATTR_PEER_AID])
4062                         return -EINVAL;
4063                 break;
4064         case NL80211_IFTYPE_STATION:
4065         case NL80211_IFTYPE_P2P_CLIENT:
4066                 /* ignore uAPSD data */
4067                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4068
4069                 /* these are disallowed */
4070                 if (params.sta_flags_mask &
4071                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4072                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4073                         return -EINVAL;
4074                 /* Only TDLS peers can be added */
4075                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4076                         return -EINVAL;
4077                 /* Can only add if TDLS ... */
4078                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4079                         return -EOPNOTSUPP;
4080                 /* ... with external setup is supported */
4081                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4082                         return -EOPNOTSUPP;
4083                 /*
4084                  * Older wpa_supplicant versions always mark the TDLS peer
4085                  * as authorized, but it shouldn't yet be.
4086                  */
4087                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4088                 break;
4089         default:
4090                 return -EOPNOTSUPP;
4091         }
4092
4093         /* be aware of params.vlan when changing code here */
4094
4095         err = rdev_add_station(rdev, dev, mac_addr, &params);
4096
4097         if (params.vlan)
4098                 dev_put(params.vlan);
4099         return err;
4100 }
4101
4102 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4103 {
4104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4105         struct net_device *dev = info->user_ptr[1];
4106         u8 *mac_addr = NULL;
4107
4108         if (info->attrs[NL80211_ATTR_MAC])
4109                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4110
4111         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4112             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4113             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4114             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4115                 return -EINVAL;
4116
4117         if (!rdev->ops->del_station)
4118                 return -EOPNOTSUPP;
4119
4120         return rdev_del_station(rdev, dev, mac_addr);
4121 }
4122
4123 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4124                                 int flags, struct net_device *dev,
4125                                 u8 *dst, u8 *next_hop,
4126                                 struct mpath_info *pinfo)
4127 {
4128         void *hdr;
4129         struct nlattr *pinfoattr;
4130
4131         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4132         if (!hdr)
4133                 return -1;
4134
4135         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4136             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4137             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4138             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4139                 goto nla_put_failure;
4140
4141         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4142         if (!pinfoattr)
4143                 goto nla_put_failure;
4144         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4145             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4146                         pinfo->frame_qlen))
4147                 goto nla_put_failure;
4148         if (((pinfo->filled & MPATH_INFO_SN) &&
4149              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4150             ((pinfo->filled & MPATH_INFO_METRIC) &&
4151              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4152                          pinfo->metric)) ||
4153             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4154              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4155                          pinfo->exptime)) ||
4156             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4157              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4158                         pinfo->flags)) ||
4159             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4160              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4161                          pinfo->discovery_timeout)) ||
4162             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4163              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4164                         pinfo->discovery_retries)))
4165                 goto nla_put_failure;
4166
4167         nla_nest_end(msg, pinfoattr);
4168
4169         return genlmsg_end(msg, hdr);
4170
4171  nla_put_failure:
4172         genlmsg_cancel(msg, hdr);
4173         return -EMSGSIZE;
4174 }
4175
4176 static int nl80211_dump_mpath(struct sk_buff *skb,
4177                               struct netlink_callback *cb)
4178 {
4179         struct mpath_info pinfo;
4180         struct cfg80211_registered_device *dev;
4181         struct wireless_dev *wdev;
4182         u8 dst[ETH_ALEN];
4183         u8 next_hop[ETH_ALEN];
4184         int path_idx = cb->args[2];
4185         int err;
4186
4187         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4188         if (err)
4189                 return err;
4190
4191         if (!dev->ops->dump_mpath) {
4192                 err = -EOPNOTSUPP;
4193                 goto out_err;
4194         }
4195
4196         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4197                 err = -EOPNOTSUPP;
4198                 goto out_err;
4199         }
4200
4201         while (1) {
4202                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4203                                       next_hop, &pinfo);
4204                 if (err == -ENOENT)
4205                         break;
4206                 if (err)
4207                         goto out_err;
4208
4209                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4210                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4211                                        wdev->netdev, dst, next_hop,
4212                                        &pinfo) < 0)
4213                         goto out;
4214
4215                 path_idx++;
4216         }
4217
4218
4219  out:
4220         cb->args[2] = path_idx;
4221         err = skb->len;
4222  out_err:
4223         nl80211_finish_wdev_dump(dev);
4224         return err;
4225 }
4226
4227 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4228 {
4229         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4230         int err;
4231         struct net_device *dev = info->user_ptr[1];
4232         struct mpath_info pinfo;
4233         struct sk_buff *msg;
4234         u8 *dst = NULL;
4235         u8 next_hop[ETH_ALEN];
4236
4237         memset(&pinfo, 0, sizeof(pinfo));
4238
4239         if (!info->attrs[NL80211_ATTR_MAC])
4240                 return -EINVAL;
4241
4242         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4243
4244         if (!rdev->ops->get_mpath)
4245                 return -EOPNOTSUPP;
4246
4247         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4248                 return -EOPNOTSUPP;
4249
4250         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4251         if (err)
4252                 return err;
4253
4254         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4255         if (!msg)
4256                 return -ENOMEM;
4257
4258         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4259                                  dev, dst, next_hop, &pinfo) < 0) {
4260                 nlmsg_free(msg);
4261                 return -ENOBUFS;
4262         }
4263
4264         return genlmsg_reply(msg, info);
4265 }
4266
4267 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4268 {
4269         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4270         struct net_device *dev = info->user_ptr[1];
4271         u8 *dst = NULL;
4272         u8 *next_hop = NULL;
4273
4274         if (!info->attrs[NL80211_ATTR_MAC])
4275                 return -EINVAL;
4276
4277         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4278                 return -EINVAL;
4279
4280         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4281         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4282
4283         if (!rdev->ops->change_mpath)
4284                 return -EOPNOTSUPP;
4285
4286         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4287                 return -EOPNOTSUPP;
4288
4289         return rdev_change_mpath(rdev, dev, dst, next_hop);
4290 }
4291
4292 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4293 {
4294         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4295         struct net_device *dev = info->user_ptr[1];
4296         u8 *dst = NULL;
4297         u8 *next_hop = NULL;
4298
4299         if (!info->attrs[NL80211_ATTR_MAC])
4300                 return -EINVAL;
4301
4302         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4303                 return -EINVAL;
4304
4305         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4306         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4307
4308         if (!rdev->ops->add_mpath)
4309                 return -EOPNOTSUPP;
4310
4311         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4312                 return -EOPNOTSUPP;
4313
4314         return rdev_add_mpath(rdev, dev, dst, next_hop);
4315 }
4316
4317 static int nl80211_del_mpath(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         u8 *dst = NULL;
4322
4323         if (info->attrs[NL80211_ATTR_MAC])
4324                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4325
4326         if (!rdev->ops->del_mpath)
4327                 return -EOPNOTSUPP;
4328
4329         return rdev_del_mpath(rdev, dev, dst);
4330 }
4331
4332 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4333 {
4334         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4335         struct net_device *dev = info->user_ptr[1];
4336         struct bss_parameters params;
4337
4338         memset(&params, 0, sizeof(params));
4339         /* default to not changing parameters */
4340         params.use_cts_prot = -1;
4341         params.use_short_preamble = -1;
4342         params.use_short_slot_time = -1;
4343         params.ap_isolate = -1;
4344         params.ht_opmode = -1;
4345         params.p2p_ctwindow = -1;
4346         params.p2p_opp_ps = -1;
4347
4348         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4349                 params.use_cts_prot =
4350                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4351         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4352                 params.use_short_preamble =
4353                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4354         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4355                 params.use_short_slot_time =
4356                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4357         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4358                 params.basic_rates =
4359                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4360                 params.basic_rates_len =
4361                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4362         }
4363         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4364                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4365         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4366                 params.ht_opmode =
4367                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4368
4369         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4370                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4371                         return -EINVAL;
4372                 params.p2p_ctwindow =
4373                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4374                 if (params.p2p_ctwindow < 0)
4375                         return -EINVAL;
4376                 if (params.p2p_ctwindow != 0 &&
4377                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4378                         return -EINVAL;
4379         }
4380
4381         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4382                 u8 tmp;
4383
4384                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4385                         return -EINVAL;
4386                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4387                 if (tmp > 1)
4388                         return -EINVAL;
4389                 params.p2p_opp_ps = tmp;
4390                 if (params.p2p_opp_ps &&
4391                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4392                         return -EINVAL;
4393         }
4394
4395         if (!rdev->ops->change_bss)
4396                 return -EOPNOTSUPP;
4397
4398         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4399             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4400                 return -EOPNOTSUPP;
4401
4402         return rdev_change_bss(rdev, dev, &params);
4403 }
4404
4405 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4406         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4407         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4408         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4409         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4410         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4411         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4412 };
4413
4414 static int parse_reg_rule(struct nlattr *tb[],
4415         struct ieee80211_reg_rule *reg_rule)
4416 {
4417         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4418         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4419
4420         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4421                 return -EINVAL;
4422         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4423                 return -EINVAL;
4424         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4425                 return -EINVAL;
4426         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4427                 return -EINVAL;
4428         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4429                 return -EINVAL;
4430
4431         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4432
4433         freq_range->start_freq_khz =
4434                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4435         freq_range->end_freq_khz =
4436                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4437         freq_range->max_bandwidth_khz =
4438                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4439
4440         power_rule->max_eirp =
4441                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4442
4443         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4444                 power_rule->max_antenna_gain =
4445                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4446
4447         return 0;
4448 }
4449
4450 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4451 {
4452         int r;
4453         char *data = NULL;
4454         enum nl80211_user_reg_hint_type user_reg_hint_type;
4455
4456         /*
4457          * You should only get this when cfg80211 hasn't yet initialized
4458          * completely when built-in to the kernel right between the time
4459          * window between nl80211_init() and regulatory_init(), if that is
4460          * even possible.
4461          */
4462         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4463                 return -EINPROGRESS;
4464
4465         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4466                 return -EINVAL;
4467
4468         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4469
4470         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4471                 user_reg_hint_type =
4472                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4473         else
4474                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4475
4476         switch (user_reg_hint_type) {
4477         case NL80211_USER_REG_HINT_USER:
4478         case NL80211_USER_REG_HINT_CELL_BASE:
4479                 break;
4480         default:
4481                 return -EINVAL;
4482         }
4483
4484         r = regulatory_hint_user(data, user_reg_hint_type);
4485
4486         return r;
4487 }
4488
4489 static int nl80211_get_mesh_config(struct sk_buff *skb,
4490                                    struct genl_info *info)
4491 {
4492         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4493         struct net_device *dev = info->user_ptr[1];
4494         struct wireless_dev *wdev = dev->ieee80211_ptr;
4495         struct mesh_config cur_params;
4496         int err = 0;
4497         void *hdr;
4498         struct nlattr *pinfoattr;
4499         struct sk_buff *msg;
4500
4501         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4502                 return -EOPNOTSUPP;
4503
4504         if (!rdev->ops->get_mesh_config)
4505                 return -EOPNOTSUPP;
4506
4507         wdev_lock(wdev);
4508         /* If not connected, get default parameters */
4509         if (!wdev->mesh_id_len)
4510                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4511         else
4512                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4513         wdev_unlock(wdev);
4514
4515         if (err)
4516                 return err;
4517
4518         /* Draw up a netlink message to send back */
4519         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4520         if (!msg)
4521                 return -ENOMEM;
4522         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4523                              NL80211_CMD_GET_MESH_CONFIG);
4524         if (!hdr)
4525                 goto out;
4526         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4527         if (!pinfoattr)
4528                 goto nla_put_failure;
4529         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4530             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4531                         cur_params.dot11MeshRetryTimeout) ||
4532             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4533                         cur_params.dot11MeshConfirmTimeout) ||
4534             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4535                         cur_params.dot11MeshHoldingTimeout) ||
4536             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4537                         cur_params.dot11MeshMaxPeerLinks) ||
4538             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4539                        cur_params.dot11MeshMaxRetries) ||
4540             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4541                        cur_params.dot11MeshTTL) ||
4542             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4543                        cur_params.element_ttl) ||
4544             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4545                        cur_params.auto_open_plinks) ||
4546             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4547                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4548             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4549                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4550             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4551                         cur_params.path_refresh_time) ||
4552             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4553                         cur_params.min_discovery_timeout) ||
4554             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4555                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4556             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4557                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4558             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4559                         cur_params.dot11MeshHWMPperrMinInterval) ||
4560             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4561                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4562             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4563                        cur_params.dot11MeshHWMPRootMode) ||
4564             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4565                         cur_params.dot11MeshHWMPRannInterval) ||
4566             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4567                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4568             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4569                        cur_params.dot11MeshForwarding) ||
4570             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4571                         cur_params.rssi_threshold) ||
4572             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4573                         cur_params.ht_opmode) ||
4574             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4575                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4576             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4577                         cur_params.dot11MeshHWMProotInterval) ||
4578             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4579                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4580             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4581                         cur_params.power_mode) ||
4582             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4583                         cur_params.dot11MeshAwakeWindowDuration) ||
4584             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4585                         cur_params.plink_timeout))
4586                 goto nla_put_failure;
4587         nla_nest_end(msg, pinfoattr);
4588         genlmsg_end(msg, hdr);
4589         return genlmsg_reply(msg, info);
4590
4591  nla_put_failure:
4592         genlmsg_cancel(msg, hdr);
4593  out:
4594         nlmsg_free(msg);
4595         return -ENOBUFS;
4596 }
4597
4598 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4599         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4600         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4601         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4602         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4603         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4604         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4605         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4606         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4607         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4608         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4609         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4610         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4611         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4612         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4613         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4614         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4615         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4616         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4617         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4618         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4619         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4620         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4621         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4622         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4623         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4624         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4625         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4626         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4627 };
4628
4629 static const struct nla_policy
4630         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4631         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4632         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4633         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4634         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4635         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4636         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4637         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4638                                     .len = IEEE80211_MAX_DATA_LEN },
4639         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4640 };
4641
4642 static int nl80211_parse_mesh_config(struct genl_info *info,
4643                                      struct mesh_config *cfg,
4644                                      u32 *mask_out)
4645 {
4646         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4647         u32 mask = 0;
4648
4649 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4650 do {                                                                        \
4651         if (tb[attr]) {                                                     \
4652                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4653                         return -EINVAL;                                     \
4654                 cfg->param = fn(tb[attr]);                                  \
4655                 mask |= (1 << (attr - 1));                                  \
4656         }                                                                   \
4657 } while (0)
4658
4659
4660         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4661                 return -EINVAL;
4662         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4663                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4664                              nl80211_meshconf_params_policy))
4665                 return -EINVAL;
4666
4667         /* This makes sure that there aren't more than 32 mesh config
4668          * parameters (otherwise our bitfield scheme would not work.) */
4669         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4670
4671         /* Fill in the params struct */
4672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4673                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4674                                   nla_get_u16);
4675         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4676                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4677                                   nla_get_u16);
4678         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4679                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4680                                   nla_get_u16);
4681         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4682                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4683                                   nla_get_u16);
4684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4685                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4686                                   nla_get_u8);
4687         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4688                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4689         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4690                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4691                                   nla_get_u8);
4692         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4693                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4694                                   nla_get_u8);
4695         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4696                                   1, 255, mask,
4697                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4698                                   nla_get_u32);
4699         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4700                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4701                                   nla_get_u8);
4702         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4703                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4704                                   nla_get_u32);
4705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4706                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4707                                   nla_get_u16);
4708         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4709                                   1, 65535, mask,
4710                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4711                                   nla_get_u32);
4712         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4713                                   1, 65535, mask,
4714                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4715                                   nla_get_u16);
4716         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4717                                   1, 65535, mask,
4718                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4719                                   nla_get_u16);
4720         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4721                                   dot11MeshHWMPnetDiameterTraversalTime,
4722                                   1, 65535, mask,
4723                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4724                                   nla_get_u16);
4725         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4726                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4727                                   nla_get_u8);
4728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4729                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4730                                   nla_get_u16);
4731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4732                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4733                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4734                                   nla_get_u8);
4735         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4736                                   mask, NL80211_MESHCONF_FORWARDING,
4737                                   nla_get_u8);
4738         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4739                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4740                                   nla_get_u32);
4741         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4742                                   mask, NL80211_MESHCONF_HT_OPMODE,
4743                                   nla_get_u16);
4744         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4745                                   1, 65535, mask,
4746                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4747                                   nla_get_u32);
4748         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4749                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4750                                   nla_get_u16);
4751         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4752                                   dot11MeshHWMPconfirmationInterval,
4753                                   1, 65535, mask,
4754                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4755                                   nla_get_u16);
4756         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4757                                   NL80211_MESH_POWER_ACTIVE,
4758                                   NL80211_MESH_POWER_MAX,
4759                                   mask, NL80211_MESHCONF_POWER_MODE,
4760                                   nla_get_u32);
4761         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4762                                   0, 65535, mask,
4763                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4764         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4765                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4766                                   nla_get_u32);
4767         if (mask_out)
4768                 *mask_out = mask;
4769
4770         return 0;
4771
4772 #undef FILL_IN_MESH_PARAM_IF_SET
4773 }
4774
4775 static int nl80211_parse_mesh_setup(struct genl_info *info,
4776                                      struct mesh_setup *setup)
4777 {
4778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4779         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4780
4781         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4782                 return -EINVAL;
4783         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4784                              info->attrs[NL80211_ATTR_MESH_SETUP],
4785                              nl80211_mesh_setup_params_policy))
4786                 return -EINVAL;
4787
4788         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4789                 setup->sync_method =
4790                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4791                  IEEE80211_SYNC_METHOD_VENDOR :
4792                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4793
4794         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4795                 setup->path_sel_proto =
4796                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4797                  IEEE80211_PATH_PROTOCOL_VENDOR :
4798                  IEEE80211_PATH_PROTOCOL_HWMP;
4799
4800         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4801                 setup->path_metric =
4802                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4803                  IEEE80211_PATH_METRIC_VENDOR :
4804                  IEEE80211_PATH_METRIC_AIRTIME;
4805
4806
4807         if (tb[NL80211_MESH_SETUP_IE]) {
4808                 struct nlattr *ieattr =
4809                         tb[NL80211_MESH_SETUP_IE];
4810                 if (!is_valid_ie_attr(ieattr))
4811                         return -EINVAL;
4812                 setup->ie = nla_data(ieattr);
4813                 setup->ie_len = nla_len(ieattr);
4814         }
4815         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4816             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4817                 return -EINVAL;
4818         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4819         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4820         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4821         if (setup->is_secure)
4822                 setup->user_mpm = true;
4823
4824         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4825                 if (!setup->user_mpm)
4826                         return -EINVAL;
4827                 setup->auth_id =
4828                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4829         }
4830
4831         return 0;
4832 }
4833
4834 static int nl80211_update_mesh_config(struct sk_buff *skb,
4835                                       struct genl_info *info)
4836 {
4837         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4838         struct net_device *dev = info->user_ptr[1];
4839         struct wireless_dev *wdev = dev->ieee80211_ptr;
4840         struct mesh_config cfg;
4841         u32 mask;
4842         int err;
4843
4844         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4845                 return -EOPNOTSUPP;
4846
4847         if (!rdev->ops->update_mesh_config)
4848                 return -EOPNOTSUPP;
4849
4850         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4851         if (err)
4852                 return err;
4853
4854         wdev_lock(wdev);
4855         if (!wdev->mesh_id_len)
4856                 err = -ENOLINK;
4857
4858         if (!err)
4859                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4860
4861         wdev_unlock(wdev);
4862
4863         return err;
4864 }
4865
4866 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4867 {
4868         const struct ieee80211_regdomain *regdom;
4869         struct sk_buff *msg;
4870         void *hdr = NULL;
4871         struct nlattr *nl_reg_rules;
4872         unsigned int i;
4873
4874         if (!cfg80211_regdomain)
4875                 return -EINVAL;
4876
4877         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4878         if (!msg)
4879                 return -ENOBUFS;
4880
4881         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4882                              NL80211_CMD_GET_REG);
4883         if (!hdr)
4884                 goto put_failure;
4885
4886         if (reg_last_request_cell_base() &&
4887             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4888                         NL80211_USER_REG_HINT_CELL_BASE))
4889                 goto nla_put_failure;
4890
4891         rcu_read_lock();
4892         regdom = rcu_dereference(cfg80211_regdomain);
4893
4894         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4895             (regdom->dfs_region &&
4896              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4897                 goto nla_put_failure_rcu;
4898
4899         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4900         if (!nl_reg_rules)
4901                 goto nla_put_failure_rcu;
4902
4903         for (i = 0; i < regdom->n_reg_rules; i++) {
4904                 struct nlattr *nl_reg_rule;
4905                 const struct ieee80211_reg_rule *reg_rule;
4906                 const struct ieee80211_freq_range *freq_range;
4907                 const struct ieee80211_power_rule *power_rule;
4908
4909                 reg_rule = &regdom->reg_rules[i];
4910                 freq_range = &reg_rule->freq_range;
4911                 power_rule = &reg_rule->power_rule;
4912
4913                 nl_reg_rule = nla_nest_start(msg, i);
4914                 if (!nl_reg_rule)
4915                         goto nla_put_failure_rcu;
4916
4917                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4918                                 reg_rule->flags) ||
4919                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4920                                 freq_range->start_freq_khz) ||
4921                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4922                                 freq_range->end_freq_khz) ||
4923                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4924                                 freq_range->max_bandwidth_khz) ||
4925                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4926                                 power_rule->max_antenna_gain) ||
4927                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4928                                 power_rule->max_eirp))
4929                         goto nla_put_failure_rcu;
4930
4931                 nla_nest_end(msg, nl_reg_rule);
4932         }
4933         rcu_read_unlock();
4934
4935         nla_nest_end(msg, nl_reg_rules);
4936
4937         genlmsg_end(msg, hdr);
4938         return genlmsg_reply(msg, info);
4939
4940 nla_put_failure_rcu:
4941         rcu_read_unlock();
4942 nla_put_failure:
4943         genlmsg_cancel(msg, hdr);
4944 put_failure:
4945         nlmsg_free(msg);
4946         return -EMSGSIZE;
4947 }
4948
4949 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4950 {
4951         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4952         struct nlattr *nl_reg_rule;
4953         char *alpha2 = NULL;
4954         int rem_reg_rules = 0, r = 0;
4955         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4956         u8 dfs_region = 0;
4957         struct ieee80211_regdomain *rd = NULL;
4958
4959         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4960                 return -EINVAL;
4961
4962         if (!info->attrs[NL80211_ATTR_REG_RULES])
4963                 return -EINVAL;
4964
4965         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4966
4967         if (info->attrs[NL80211_ATTR_DFS_REGION])
4968                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4969
4970         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4971                             rem_reg_rules) {
4972                 num_rules++;
4973                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4974                         return -EINVAL;
4975         }
4976
4977         size_of_regd = sizeof(struct ieee80211_regdomain) +
4978                        num_rules * sizeof(struct ieee80211_reg_rule);
4979
4980         rd = kzalloc(size_of_regd, GFP_KERNEL);
4981         if (!rd)
4982                 return -ENOMEM;
4983
4984         rd->n_reg_rules = num_rules;
4985         rd->alpha2[0] = alpha2[0];
4986         rd->alpha2[1] = alpha2[1];
4987
4988         /*
4989          * Disable DFS master mode if the DFS region was
4990          * not supported or known on this kernel.
4991          */
4992         if (reg_supported_dfs_region(dfs_region))
4993                 rd->dfs_region = dfs_region;
4994
4995         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4996                             rem_reg_rules) {
4997                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4998                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4999                           reg_rule_policy);
5000                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5001                 if (r)
5002                         goto bad_reg;
5003
5004                 rule_idx++;
5005
5006                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5007                         r = -EINVAL;
5008                         goto bad_reg;
5009                 }
5010         }
5011
5012         r = set_regdom(rd);
5013         /* set_regdom took ownership */
5014         rd = NULL;
5015
5016  bad_reg:
5017         kfree(rd);
5018         return r;
5019 }
5020
5021 static int validate_scan_freqs(struct nlattr *freqs)
5022 {
5023         struct nlattr *attr1, *attr2;
5024         int n_channels = 0, tmp1, tmp2;
5025
5026         nla_for_each_nested(attr1, freqs, tmp1) {
5027                 n_channels++;
5028                 /*
5029                  * Some hardware has a limited channel list for
5030                  * scanning, and it is pretty much nonsensical
5031                  * to scan for a channel twice, so disallow that
5032                  * and don't require drivers to check that the
5033                  * channel list they get isn't longer than what
5034                  * they can scan, as long as they can scan all
5035                  * the channels they registered at once.
5036                  */
5037                 nla_for_each_nested(attr2, freqs, tmp2)
5038                         if (attr1 != attr2 &&
5039                             nla_get_u32(attr1) == nla_get_u32(attr2))
5040                                 return 0;
5041         }
5042
5043         return n_channels;
5044 }
5045
5046 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5047 {
5048         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5049         struct wireless_dev *wdev = info->user_ptr[1];
5050         struct cfg80211_scan_request *request;
5051         struct nlattr *attr;
5052         struct wiphy *wiphy;
5053         int err, tmp, n_ssids = 0, n_channels, i;
5054         size_t ie_len;
5055
5056         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5057                 return -EINVAL;
5058
5059         wiphy = &rdev->wiphy;
5060
5061         if (!rdev->ops->scan)
5062                 return -EOPNOTSUPP;
5063
5064         if (rdev->scan_req) {
5065                 err = -EBUSY;
5066                 goto unlock;
5067         }
5068
5069         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5070                 n_channels = validate_scan_freqs(
5071                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5072                 if (!n_channels) {
5073                         err = -EINVAL;
5074                         goto unlock;
5075                 }
5076         } else {
5077                 enum ieee80211_band band;
5078                 n_channels = 0;
5079
5080                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5081                         if (wiphy->bands[band])
5082                                 n_channels += wiphy->bands[band]->n_channels;
5083         }
5084
5085         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5086                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5087                         n_ssids++;
5088
5089         if (n_ssids > wiphy->max_scan_ssids) {
5090                 err = -EINVAL;
5091                 goto unlock;
5092         }
5093
5094         if (info->attrs[NL80211_ATTR_IE])
5095                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5096         else
5097                 ie_len = 0;
5098
5099         if (ie_len > wiphy->max_scan_ie_len) {
5100                 err = -EINVAL;
5101                 goto unlock;
5102         }
5103
5104         request = kzalloc(sizeof(*request)
5105                         + sizeof(*request->ssids) * n_ssids
5106                         + sizeof(*request->channels) * n_channels
5107                         + ie_len, GFP_KERNEL);
5108         if (!request) {
5109                 err = -ENOMEM;
5110                 goto unlock;
5111         }
5112
5113         if (n_ssids)
5114                 request->ssids = (void *)&request->channels[n_channels];
5115         request->n_ssids = n_ssids;
5116         if (ie_len) {
5117                 if (request->ssids)
5118                         request->ie = (void *)(request->ssids + n_ssids);
5119                 else
5120                         request->ie = (void *)(request->channels + n_channels);
5121         }
5122
5123         i = 0;
5124         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5125                 /* user specified, bail out if channel not found */
5126                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5127                         struct ieee80211_channel *chan;
5128
5129                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5130
5131                         if (!chan) {
5132                                 err = -EINVAL;
5133                                 goto out_free;
5134                         }
5135
5136                         /* ignore disabled channels */
5137                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5138                                 continue;
5139
5140                         request->channels[i] = chan;
5141                         i++;
5142                 }
5143         } else {
5144                 enum ieee80211_band band;
5145
5146                 /* all channels */
5147                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5148                         int j;
5149                         if (!wiphy->bands[band])
5150                                 continue;
5151                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5152                                 struct ieee80211_channel *chan;
5153
5154                                 chan = &wiphy->bands[band]->channels[j];
5155
5156                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5157                                         continue;
5158
5159                                 request->channels[i] = chan;
5160                                 i++;
5161                         }
5162                 }
5163         }
5164
5165         if (!i) {
5166                 err = -EINVAL;
5167                 goto out_free;
5168         }
5169
5170         request->n_channels = i;
5171
5172         i = 0;
5173         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5174                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5175                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5176                                 err = -EINVAL;
5177                                 goto out_free;
5178                         }
5179                         request->ssids[i].ssid_len = nla_len(attr);
5180                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5181                         i++;
5182                 }
5183         }
5184
5185         if (info->attrs[NL80211_ATTR_IE]) {
5186                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5187                 memcpy((void *)request->ie,
5188                        nla_data(info->attrs[NL80211_ATTR_IE]),
5189                        request->ie_len);
5190         }
5191
5192         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5193                 if (wiphy->bands[i])
5194                         request->rates[i] =
5195                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5196
5197         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5198                 nla_for_each_nested(attr,
5199                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5200                                     tmp) {
5201                         enum ieee80211_band band = nla_type(attr);
5202
5203                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5204                                 err = -EINVAL;
5205                                 goto out_free;
5206                         }
5207                         err = ieee80211_get_ratemask(wiphy->bands[band],
5208                                                      nla_data(attr),
5209                                                      nla_len(attr),
5210                                                      &request->rates[band]);
5211                         if (err)
5212                                 goto out_free;
5213                 }
5214         }
5215
5216         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5217                 request->flags = nla_get_u32(
5218                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5219                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5220                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5221                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5222                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5223                         err = -EOPNOTSUPP;
5224                         goto out_free;
5225                 }
5226         }
5227
5228         request->no_cck =
5229                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5230
5231         request->wdev = wdev;
5232         request->wiphy = &rdev->wiphy;
5233         request->scan_start = jiffies;
5234
5235         rdev->scan_req = request;
5236         err = rdev_scan(rdev, request);
5237
5238         if (!err) {
5239                 nl80211_send_scan_start(rdev, wdev);
5240                 if (wdev->netdev)
5241                         dev_hold(wdev->netdev);
5242         } else {
5243  out_free:
5244                 rdev->scan_req = NULL;
5245                 kfree(request);
5246         }
5247
5248  unlock:
5249         return err;
5250 }
5251
5252 static int nl80211_start_sched_scan(struct sk_buff *skb,
5253                                     struct genl_info *info)
5254 {
5255         struct cfg80211_sched_scan_request *request;
5256         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5257         struct net_device *dev = info->user_ptr[1];
5258         struct nlattr *attr;
5259         struct wiphy *wiphy;
5260         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5261         u32 interval;
5262         enum ieee80211_band band;
5263         size_t ie_len;
5264         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5265
5266         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5267             !rdev->ops->sched_scan_start)
5268                 return -EOPNOTSUPP;
5269
5270         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5271                 return -EINVAL;
5272
5273         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5274                 return -EINVAL;
5275
5276         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5277         if (interval == 0)
5278                 return -EINVAL;
5279
5280         wiphy = &rdev->wiphy;
5281
5282         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5283                 n_channels = validate_scan_freqs(
5284                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5285                 if (!n_channels)
5286                         return -EINVAL;
5287         } else {
5288                 n_channels = 0;
5289
5290                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5291                         if (wiphy->bands[band])
5292                                 n_channels += wiphy->bands[band]->n_channels;
5293         }
5294
5295         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5296                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5297                                     tmp)
5298                         n_ssids++;
5299
5300         if (n_ssids > wiphy->max_sched_scan_ssids)
5301                 return -EINVAL;
5302
5303         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5304                 nla_for_each_nested(attr,
5305                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5306                                     tmp)
5307                         n_match_sets++;
5308
5309         if (n_match_sets > wiphy->max_match_sets)
5310                 return -EINVAL;
5311
5312         if (info->attrs[NL80211_ATTR_IE])
5313                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5314         else
5315                 ie_len = 0;
5316
5317         if (ie_len > wiphy->max_sched_scan_ie_len)
5318                 return -EINVAL;
5319
5320         if (rdev->sched_scan_req) {
5321                 err = -EINPROGRESS;
5322                 goto out;
5323         }
5324
5325         request = kzalloc(sizeof(*request)
5326                         + sizeof(*request->ssids) * n_ssids
5327                         + sizeof(*request->match_sets) * n_match_sets
5328                         + sizeof(*request->channels) * n_channels
5329                         + ie_len, GFP_KERNEL);
5330         if (!request) {
5331                 err = -ENOMEM;
5332                 goto out;
5333         }
5334
5335         if (n_ssids)
5336                 request->ssids = (void *)&request->channels[n_channels];
5337         request->n_ssids = n_ssids;
5338         if (ie_len) {
5339                 if (request->ssids)
5340                         request->ie = (void *)(request->ssids + n_ssids);
5341                 else
5342                         request->ie = (void *)(request->channels + n_channels);
5343         }
5344
5345         if (n_match_sets) {
5346                 if (request->ie)
5347                         request->match_sets = (void *)(request->ie + ie_len);
5348                 else if (request->ssids)
5349                         request->match_sets =
5350                                 (void *)(request->ssids + n_ssids);
5351                 else
5352                         request->match_sets =
5353                                 (void *)(request->channels + n_channels);
5354         }
5355         request->n_match_sets = n_match_sets;
5356
5357         i = 0;
5358         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5359                 /* user specified, bail out if channel not found */
5360                 nla_for_each_nested(attr,
5361                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5362                                     tmp) {
5363                         struct ieee80211_channel *chan;
5364
5365                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5366
5367                         if (!chan) {
5368                                 err = -EINVAL;
5369                                 goto out_free;
5370                         }
5371
5372                         /* ignore disabled channels */
5373                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5374                                 continue;
5375
5376                         request->channels[i] = chan;
5377                         i++;
5378                 }
5379         } else {
5380                 /* all channels */
5381                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5382                         int j;
5383                         if (!wiphy->bands[band])
5384                                 continue;
5385                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5386                                 struct ieee80211_channel *chan;
5387
5388                                 chan = &wiphy->bands[band]->channels[j];
5389
5390                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5391                                         continue;
5392
5393                                 request->channels[i] = chan;
5394                                 i++;
5395                         }
5396                 }
5397         }
5398
5399         if (!i) {
5400                 err = -EINVAL;
5401                 goto out_free;
5402         }
5403
5404         request->n_channels = i;
5405
5406         i = 0;
5407         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5408                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5409                                     tmp) {
5410                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5411                                 err = -EINVAL;
5412                                 goto out_free;
5413                         }
5414                         request->ssids[i].ssid_len = nla_len(attr);
5415                         memcpy(request->ssids[i].ssid, nla_data(attr),
5416                                nla_len(attr));
5417                         i++;
5418                 }
5419         }
5420
5421         i = 0;
5422         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5423                 nla_for_each_nested(attr,
5424                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5425                                     tmp) {
5426                         struct nlattr *ssid, *rssi;
5427
5428                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5429                                   nla_data(attr), nla_len(attr),
5430                                   nl80211_match_policy);
5431                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5432                         if (ssid) {
5433                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5434                                         err = -EINVAL;
5435                                         goto out_free;
5436                                 }
5437                                 memcpy(request->match_sets[i].ssid.ssid,
5438                                        nla_data(ssid), nla_len(ssid));
5439                                 request->match_sets[i].ssid.ssid_len =
5440                                         nla_len(ssid);
5441                         }
5442                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5443                         if (rssi)
5444                                 request->rssi_thold = nla_get_u32(rssi);
5445                         else
5446                                 request->rssi_thold =
5447                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5448                         i++;
5449                 }
5450         }
5451
5452         if (info->attrs[NL80211_ATTR_IE]) {
5453                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5454                 memcpy((void *)request->ie,
5455                        nla_data(info->attrs[NL80211_ATTR_IE]),
5456                        request->ie_len);
5457         }
5458
5459         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5460                 request->flags = nla_get_u32(
5461                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5462                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5463                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5464                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5465                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5466                         err = -EOPNOTSUPP;
5467                         goto out_free;
5468                 }
5469         }
5470
5471         request->dev = dev;
5472         request->wiphy = &rdev->wiphy;
5473         request->interval = interval;
5474         request->scan_start = jiffies;
5475
5476         err = rdev_sched_scan_start(rdev, dev, request);
5477         if (!err) {
5478                 rdev->sched_scan_req = request;
5479                 nl80211_send_sched_scan(rdev, dev,
5480                                         NL80211_CMD_START_SCHED_SCAN);
5481                 goto out;
5482         }
5483
5484 out_free:
5485         kfree(request);
5486 out:
5487         return err;
5488 }
5489
5490 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5491                                    struct genl_info *info)
5492 {
5493         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5494
5495         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5496             !rdev->ops->sched_scan_stop)
5497                 return -EOPNOTSUPP;
5498
5499         return __cfg80211_stop_sched_scan(rdev, false);
5500 }
5501
5502 static int nl80211_start_radar_detection(struct sk_buff *skb,
5503                                          struct genl_info *info)
5504 {
5505         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5506         struct net_device *dev = info->user_ptr[1];
5507         struct wireless_dev *wdev = dev->ieee80211_ptr;
5508         struct cfg80211_chan_def chandef;
5509         int err;
5510
5511         err = nl80211_parse_chandef(rdev, info, &chandef);
5512         if (err)
5513                 return err;
5514
5515         if (wdev->cac_started)
5516                 return -EBUSY;
5517
5518         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5519         if (err < 0)
5520                 return err;
5521
5522         if (err == 0)
5523                 return -EINVAL;
5524
5525         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5526                 return -EINVAL;
5527
5528         if (!rdev->ops->start_radar_detection)
5529                 return -EOPNOTSUPP;
5530
5531         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5532                                            chandef.chan, CHAN_MODE_SHARED,
5533                                            BIT(chandef.width));
5534         if (err)
5535                 return err;
5536
5537         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5538         if (!err) {
5539                 wdev->channel = chandef.chan;
5540                 wdev->cac_started = true;
5541                 wdev->cac_start_time = jiffies;
5542         }
5543         return err;
5544 }
5545
5546 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5547                             u32 seq, int flags,
5548                             struct cfg80211_registered_device *rdev,
5549                             struct wireless_dev *wdev,
5550                             struct cfg80211_internal_bss *intbss)
5551 {
5552         struct cfg80211_bss *res = &intbss->pub;
5553         const struct cfg80211_bss_ies *ies;
5554         void *hdr;
5555         struct nlattr *bss;
5556         bool tsf = false;
5557
5558         ASSERT_WDEV_LOCK(wdev);
5559
5560         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5561                              NL80211_CMD_NEW_SCAN_RESULTS);
5562         if (!hdr)
5563                 return -1;
5564
5565         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5566
5567         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5568                 goto nla_put_failure;
5569         if (wdev->netdev &&
5570             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5571                 goto nla_put_failure;
5572         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5573                 goto nla_put_failure;
5574
5575         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5576         if (!bss)
5577                 goto nla_put_failure;
5578         if ((!is_zero_ether_addr(res->bssid) &&
5579              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5580                 goto nla_put_failure;
5581
5582         rcu_read_lock();
5583         ies = rcu_dereference(res->ies);
5584         if (ies) {
5585                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5586                         goto fail_unlock_rcu;
5587                 tsf = true;
5588                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5589                                         ies->len, ies->data))
5590                         goto fail_unlock_rcu;
5591         }
5592         ies = rcu_dereference(res->beacon_ies);
5593         if (ies) {
5594                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5595                         goto fail_unlock_rcu;
5596                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5597                                         ies->len, ies->data))
5598                         goto fail_unlock_rcu;
5599         }
5600         rcu_read_unlock();
5601
5602         if (res->beacon_interval &&
5603             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5604                 goto nla_put_failure;
5605         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5606             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5607             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5608                         jiffies_to_msecs(jiffies - intbss->ts)))
5609                 goto nla_put_failure;
5610
5611         switch (rdev->wiphy.signal_type) {
5612         case CFG80211_SIGNAL_TYPE_MBM:
5613                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5614                         goto nla_put_failure;
5615                 break;
5616         case CFG80211_SIGNAL_TYPE_UNSPEC:
5617                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5618                         goto nla_put_failure;
5619                 break;
5620         default:
5621                 break;
5622         }
5623
5624         switch (wdev->iftype) {
5625         case NL80211_IFTYPE_P2P_CLIENT:
5626         case NL80211_IFTYPE_STATION:
5627                 if (intbss == wdev->current_bss &&
5628                     nla_put_u32(msg, NL80211_BSS_STATUS,
5629                                 NL80211_BSS_STATUS_ASSOCIATED))
5630                         goto nla_put_failure;
5631                 break;
5632         case NL80211_IFTYPE_ADHOC:
5633                 if (intbss == wdev->current_bss &&
5634                     nla_put_u32(msg, NL80211_BSS_STATUS,
5635                                 NL80211_BSS_STATUS_IBSS_JOINED))
5636                         goto nla_put_failure;
5637                 break;
5638         default:
5639                 break;
5640         }
5641
5642         nla_nest_end(msg, bss);
5643
5644         return genlmsg_end(msg, hdr);
5645
5646  fail_unlock_rcu:
5647         rcu_read_unlock();
5648  nla_put_failure:
5649         genlmsg_cancel(msg, hdr);
5650         return -EMSGSIZE;
5651 }
5652
5653 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5654 {
5655         struct cfg80211_registered_device *rdev;
5656         struct cfg80211_internal_bss *scan;
5657         struct wireless_dev *wdev;
5658         int start = cb->args[2], idx = 0;
5659         int err;
5660
5661         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5662         if (err)
5663                 return err;
5664
5665         wdev_lock(wdev);
5666         spin_lock_bh(&rdev->bss_lock);
5667         cfg80211_bss_expire(rdev);
5668
5669         cb->seq = rdev->bss_generation;
5670
5671         list_for_each_entry(scan, &rdev->bss_list, list) {
5672                 if (++idx <= start)
5673                         continue;
5674                 if (nl80211_send_bss(skb, cb,
5675                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5676                                 rdev, wdev, scan) < 0) {
5677                         idx--;
5678                         break;
5679                 }
5680         }
5681
5682         spin_unlock_bh(&rdev->bss_lock);
5683         wdev_unlock(wdev);
5684
5685         cb->args[2] = idx;
5686         nl80211_finish_wdev_dump(rdev);
5687
5688         return skb->len;
5689 }
5690
5691 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5692                                 int flags, struct net_device *dev,
5693                                 struct survey_info *survey)
5694 {
5695         void *hdr;
5696         struct nlattr *infoattr;
5697
5698         hdr = nl80211hdr_put(msg, portid, seq, flags,
5699                              NL80211_CMD_NEW_SURVEY_RESULTS);
5700         if (!hdr)
5701                 return -ENOMEM;
5702
5703         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5704                 goto nla_put_failure;
5705
5706         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5707         if (!infoattr)
5708                 goto nla_put_failure;
5709
5710         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5711                         survey->channel->center_freq))
5712                 goto nla_put_failure;
5713
5714         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5715             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5716                 goto nla_put_failure;
5717         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5718             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5719                 goto nla_put_failure;
5720         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5721             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5722                         survey->channel_time))
5723                 goto nla_put_failure;
5724         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5725             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5726                         survey->channel_time_busy))
5727                 goto nla_put_failure;
5728         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5729             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5730                         survey->channel_time_ext_busy))
5731                 goto nla_put_failure;
5732         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5733             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5734                         survey->channel_time_rx))
5735                 goto nla_put_failure;
5736         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5737             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5738                         survey->channel_time_tx))
5739                 goto nla_put_failure;
5740
5741         nla_nest_end(msg, infoattr);
5742
5743         return genlmsg_end(msg, hdr);
5744
5745  nla_put_failure:
5746         genlmsg_cancel(msg, hdr);
5747         return -EMSGSIZE;
5748 }
5749
5750 static int nl80211_dump_survey(struct sk_buff *skb,
5751                         struct netlink_callback *cb)
5752 {
5753         struct survey_info survey;
5754         struct cfg80211_registered_device *dev;
5755         struct wireless_dev *wdev;
5756         int survey_idx = cb->args[2];
5757         int res;
5758
5759         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5760         if (res)
5761                 return res;
5762
5763         if (!wdev->netdev) {
5764                 res = -EINVAL;
5765                 goto out_err;
5766         }
5767
5768         if (!dev->ops->dump_survey) {
5769                 res = -EOPNOTSUPP;
5770                 goto out_err;
5771         }
5772
5773         while (1) {
5774                 struct ieee80211_channel *chan;
5775
5776                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5777                 if (res == -ENOENT)
5778                         break;
5779                 if (res)
5780                         goto out_err;
5781
5782                 /* Survey without a channel doesn't make sense */
5783                 if (!survey.channel) {
5784                         res = -EINVAL;
5785                         goto out;
5786                 }
5787
5788                 chan = ieee80211_get_channel(&dev->wiphy,
5789                                              survey.channel->center_freq);
5790                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5791                         survey_idx++;
5792                         continue;
5793                 }
5794
5795                 if (nl80211_send_survey(skb,
5796                                 NETLINK_CB(cb->skb).portid,
5797                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5798                                 wdev->netdev, &survey) < 0)
5799                         goto out;
5800                 survey_idx++;
5801         }
5802
5803  out:
5804         cb->args[2] = survey_idx;
5805         res = skb->len;
5806  out_err:
5807         nl80211_finish_wdev_dump(dev);
5808         return res;
5809 }
5810
5811 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5812 {
5813         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5814                                   NL80211_WPA_VERSION_2));
5815 }
5816
5817 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5818 {
5819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5820         struct net_device *dev = info->user_ptr[1];
5821         struct ieee80211_channel *chan;
5822         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5823         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5824         enum nl80211_auth_type auth_type;
5825         struct key_parse key;
5826         bool local_state_change;
5827
5828         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5829                 return -EINVAL;
5830
5831         if (!info->attrs[NL80211_ATTR_MAC])
5832                 return -EINVAL;
5833
5834         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5835                 return -EINVAL;
5836
5837         if (!info->attrs[NL80211_ATTR_SSID])
5838                 return -EINVAL;
5839
5840         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5841                 return -EINVAL;
5842
5843         err = nl80211_parse_key(info, &key);
5844         if (err)
5845                 return err;
5846
5847         if (key.idx >= 0) {
5848                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5849                         return -EINVAL;
5850                 if (!key.p.key || !key.p.key_len)
5851                         return -EINVAL;
5852                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5853                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5854                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5855                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5856                         return -EINVAL;
5857                 if (key.idx > 4)
5858                         return -EINVAL;
5859         } else {
5860                 key.p.key_len = 0;
5861                 key.p.key = NULL;
5862         }
5863
5864         if (key.idx >= 0) {
5865                 int i;
5866                 bool ok = false;
5867                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5868                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5869                                 ok = true;
5870                                 break;
5871                         }
5872                 }
5873                 if (!ok)
5874                         return -EINVAL;
5875         }
5876
5877         if (!rdev->ops->auth)
5878                 return -EOPNOTSUPP;
5879
5880         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5881             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5882                 return -EOPNOTSUPP;
5883
5884         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5885         chan = ieee80211_get_channel(&rdev->wiphy,
5886                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5887         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5888                 return -EINVAL;
5889
5890         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5891         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5892
5893         if (info->attrs[NL80211_ATTR_IE]) {
5894                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5895                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5896         }
5897
5898         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5899         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5900                 return -EINVAL;
5901
5902         if (auth_type == NL80211_AUTHTYPE_SAE &&
5903             !info->attrs[NL80211_ATTR_SAE_DATA])
5904                 return -EINVAL;
5905
5906         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5907                 if (auth_type != NL80211_AUTHTYPE_SAE)
5908                         return -EINVAL;
5909                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5910                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5911                 /* need to include at least Auth Transaction and Status Code */
5912                 if (sae_data_len < 4)
5913                         return -EINVAL;
5914         }
5915
5916         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5917
5918         /*
5919          * Since we no longer track auth state, ignore
5920          * requests to only change local state.
5921          */
5922         if (local_state_change)
5923                 return 0;
5924
5925         wdev_lock(dev->ieee80211_ptr);
5926         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5927                                  ssid, ssid_len, ie, ie_len,
5928                                  key.p.key, key.p.key_len, key.idx,
5929                                  sae_data, sae_data_len);
5930         wdev_unlock(dev->ieee80211_ptr);
5931         return err;
5932 }
5933
5934 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5935                                    struct genl_info *info,
5936                                    struct cfg80211_crypto_settings *settings,
5937                                    int cipher_limit)
5938 {
5939         memset(settings, 0, sizeof(*settings));
5940
5941         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5942
5943         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5944                 u16 proto;
5945                 proto = nla_get_u16(
5946                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5947                 settings->control_port_ethertype = cpu_to_be16(proto);
5948                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5949                     proto != ETH_P_PAE)
5950                         return -EINVAL;
5951                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5952                         settings->control_port_no_encrypt = true;
5953         } else
5954                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5955
5956         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5957                 void *data;
5958                 int len, i;
5959
5960                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5961                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5962                 settings->n_ciphers_pairwise = len / sizeof(u32);
5963
5964                 if (len % sizeof(u32))
5965                         return -EINVAL;
5966
5967                 if (settings->n_ciphers_pairwise > cipher_limit)
5968                         return -EINVAL;
5969
5970                 memcpy(settings->ciphers_pairwise, data, len);
5971
5972                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5973                         if (!cfg80211_supported_cipher_suite(
5974                                         &rdev->wiphy,
5975                                         settings->ciphers_pairwise[i]))
5976                                 return -EINVAL;
5977         }
5978
5979         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5980                 settings->cipher_group =
5981                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5982                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5983                                                      settings->cipher_group))
5984                         return -EINVAL;
5985         }
5986
5987         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5988                 settings->wpa_versions =
5989                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5990                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5991                         return -EINVAL;
5992         }
5993
5994         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5995                 void *data;
5996                 int len;
5997
5998                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5999                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6000                 settings->n_akm_suites = len / sizeof(u32);
6001
6002                 if (len % sizeof(u32))
6003                         return -EINVAL;
6004
6005                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6006                         return -EINVAL;
6007
6008                 memcpy(settings->akm_suites, data, len);
6009         }
6010
6011         return 0;
6012 }
6013
6014 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6015 {
6016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6017         struct net_device *dev = info->user_ptr[1];
6018         struct ieee80211_channel *chan;
6019         struct cfg80211_assoc_request req = {};
6020         const u8 *bssid, *ssid;
6021         int err, ssid_len = 0;
6022
6023         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6024                 return -EINVAL;
6025
6026         if (!info->attrs[NL80211_ATTR_MAC] ||
6027             !info->attrs[NL80211_ATTR_SSID] ||
6028             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6029                 return -EINVAL;
6030
6031         if (!rdev->ops->assoc)
6032                 return -EOPNOTSUPP;
6033
6034         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6035             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6036                 return -EOPNOTSUPP;
6037
6038         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6039
6040         chan = ieee80211_get_channel(&rdev->wiphy,
6041                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6042         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6043                 return -EINVAL;
6044
6045         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6046         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6047
6048         if (info->attrs[NL80211_ATTR_IE]) {
6049                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6050                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6051         }
6052
6053         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6054                 enum nl80211_mfp mfp =
6055                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6056                 if (mfp == NL80211_MFP_REQUIRED)
6057                         req.use_mfp = true;
6058                 else if (mfp != NL80211_MFP_NO)
6059                         return -EINVAL;
6060         }
6061
6062         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6063                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6064
6065         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6066                 req.flags |= ASSOC_REQ_DISABLE_HT;
6067
6068         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6069                 memcpy(&req.ht_capa_mask,
6070                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6071                        sizeof(req.ht_capa_mask));
6072
6073         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6074                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6075                         return -EINVAL;
6076                 memcpy(&req.ht_capa,
6077                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6078                        sizeof(req.ht_capa));
6079         }
6080
6081         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6082                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6083
6084         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6085                 memcpy(&req.vht_capa_mask,
6086                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6087                        sizeof(req.vht_capa_mask));
6088
6089         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6090                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6091                         return -EINVAL;
6092                 memcpy(&req.vht_capa,
6093                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6094                        sizeof(req.vht_capa));
6095         }
6096
6097         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6098         if (!err) {
6099                 wdev_lock(dev->ieee80211_ptr);
6100                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6101                                           ssid, ssid_len, &req);
6102                 wdev_unlock(dev->ieee80211_ptr);
6103         }
6104
6105         return err;
6106 }
6107
6108 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6109 {
6110         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6111         struct net_device *dev = info->user_ptr[1];
6112         const u8 *ie = NULL, *bssid;
6113         int ie_len = 0, err;
6114         u16 reason_code;
6115         bool local_state_change;
6116
6117         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6118                 return -EINVAL;
6119
6120         if (!info->attrs[NL80211_ATTR_MAC])
6121                 return -EINVAL;
6122
6123         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6124                 return -EINVAL;
6125
6126         if (!rdev->ops->deauth)
6127                 return -EOPNOTSUPP;
6128
6129         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6130             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6131                 return -EOPNOTSUPP;
6132
6133         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6134
6135         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6136         if (reason_code == 0) {
6137                 /* Reason Code 0 is reserved */
6138                 return -EINVAL;
6139         }
6140
6141         if (info->attrs[NL80211_ATTR_IE]) {
6142                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6143                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6144         }
6145
6146         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6147
6148         wdev_lock(dev->ieee80211_ptr);
6149         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6150                                    local_state_change);
6151         wdev_unlock(dev->ieee80211_ptr);
6152         return err;
6153 }
6154
6155 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6156 {
6157         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6158         struct net_device *dev = info->user_ptr[1];
6159         const u8 *ie = NULL, *bssid;
6160         int ie_len = 0, err;
6161         u16 reason_code;
6162         bool local_state_change;
6163
6164         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6165                 return -EINVAL;
6166
6167         if (!info->attrs[NL80211_ATTR_MAC])
6168                 return -EINVAL;
6169
6170         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6171                 return -EINVAL;
6172
6173         if (!rdev->ops->disassoc)
6174                 return -EOPNOTSUPP;
6175
6176         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6177             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6178                 return -EOPNOTSUPP;
6179
6180         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6181
6182         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6183         if (reason_code == 0) {
6184                 /* Reason Code 0 is reserved */
6185                 return -EINVAL;
6186         }
6187
6188         if (info->attrs[NL80211_ATTR_IE]) {
6189                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6190                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6191         }
6192
6193         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6194
6195         wdev_lock(dev->ieee80211_ptr);
6196         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6197                                      local_state_change);
6198         wdev_unlock(dev->ieee80211_ptr);
6199         return err;
6200 }
6201
6202 static bool
6203 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6204                          int mcast_rate[IEEE80211_NUM_BANDS],
6205                          int rateval)
6206 {
6207         struct wiphy *wiphy = &rdev->wiphy;
6208         bool found = false;
6209         int band, i;
6210
6211         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6212                 struct ieee80211_supported_band *sband;
6213
6214                 sband = wiphy->bands[band];
6215                 if (!sband)
6216                         continue;
6217
6218                 for (i = 0; i < sband->n_bitrates; i++) {
6219                         if (sband->bitrates[i].bitrate == rateval) {
6220                                 mcast_rate[band] = i + 1;
6221                                 found = true;
6222                                 break;
6223                         }
6224                 }
6225         }
6226
6227         return found;
6228 }
6229
6230 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6231 {
6232         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6233         struct net_device *dev = info->user_ptr[1];
6234         struct cfg80211_ibss_params ibss;
6235         struct wiphy *wiphy;
6236         struct cfg80211_cached_keys *connkeys = NULL;
6237         int err;
6238
6239         memset(&ibss, 0, sizeof(ibss));
6240
6241         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6242                 return -EINVAL;
6243
6244         if (!info->attrs[NL80211_ATTR_SSID] ||
6245             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6246                 return -EINVAL;
6247
6248         ibss.beacon_interval = 100;
6249
6250         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6251                 ibss.beacon_interval =
6252                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6253                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6254                         return -EINVAL;
6255         }
6256
6257         if (!rdev->ops->join_ibss)
6258                 return -EOPNOTSUPP;
6259
6260         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6261                 return -EOPNOTSUPP;
6262
6263         wiphy = &rdev->wiphy;
6264
6265         if (info->attrs[NL80211_ATTR_MAC]) {
6266                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6267
6268                 if (!is_valid_ether_addr(ibss.bssid))
6269                         return -EINVAL;
6270         }
6271         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6272         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6273
6274         if (info->attrs[NL80211_ATTR_IE]) {
6275                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6276                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6277         }
6278
6279         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6280         if (err)
6281                 return err;
6282
6283         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6284                 return -EINVAL;
6285
6286         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
6287                 return -EINVAL;
6288         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
6289             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
6290                 return -EINVAL;
6291
6292         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6293         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6294
6295         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6296                 u8 *rates =
6297                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6298                 int n_rates =
6299                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6300                 struct ieee80211_supported_band *sband =
6301                         wiphy->bands[ibss.chandef.chan->band];
6302
6303                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6304                                              &ibss.basic_rates);
6305                 if (err)
6306                         return err;
6307         }
6308
6309         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6310             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6311                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6312                 return -EINVAL;
6313
6314         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6315                 bool no_ht = false;
6316
6317                 connkeys = nl80211_parse_connkeys(rdev,
6318                                           info->attrs[NL80211_ATTR_KEYS],
6319                                           &no_ht);
6320                 if (IS_ERR(connkeys))
6321                         return PTR_ERR(connkeys);
6322
6323                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6324                     no_ht) {
6325                         kfree(connkeys);
6326                         return -EINVAL;
6327                 }
6328         }
6329
6330         ibss.control_port =
6331                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6332
6333         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6334         if (err)
6335                 kfree(connkeys);
6336         return err;
6337 }
6338
6339 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6340 {
6341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6342         struct net_device *dev = info->user_ptr[1];
6343
6344         if (!rdev->ops->leave_ibss)
6345                 return -EOPNOTSUPP;
6346
6347         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6348                 return -EOPNOTSUPP;
6349
6350         return cfg80211_leave_ibss(rdev, dev, false);
6351 }
6352
6353 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6354 {
6355         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6356         struct net_device *dev = info->user_ptr[1];
6357         int mcast_rate[IEEE80211_NUM_BANDS];
6358         u32 nla_rate;
6359         int err;
6360
6361         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6362             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6363                 return -EOPNOTSUPP;
6364
6365         if (!rdev->ops->set_mcast_rate)
6366                 return -EOPNOTSUPP;
6367
6368         memset(mcast_rate, 0, sizeof(mcast_rate));
6369
6370         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6371                 return -EINVAL;
6372
6373         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6374         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6375                 return -EINVAL;
6376
6377         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6378
6379         return err;
6380 }
6381
6382
6383 #ifdef CONFIG_NL80211_TESTMODE
6384 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6385         .name = "testmode",
6386 };
6387
6388 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6389 {
6390         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6391         int err;
6392
6393         if (!info->attrs[NL80211_ATTR_TESTDATA])
6394                 return -EINVAL;
6395
6396         err = -EOPNOTSUPP;
6397         if (rdev->ops->testmode_cmd) {
6398                 rdev->testmode_info = info;
6399                 err = rdev_testmode_cmd(rdev,
6400                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6401                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6402                 rdev->testmode_info = NULL;
6403         }
6404
6405         return err;
6406 }
6407
6408 static int nl80211_testmode_dump(struct sk_buff *skb,
6409                                  struct netlink_callback *cb)
6410 {
6411         struct cfg80211_registered_device *rdev;
6412         int err;
6413         long phy_idx;
6414         void *data = NULL;
6415         int data_len = 0;
6416
6417         rtnl_lock();
6418
6419         if (cb->args[0]) {
6420                 /*
6421                  * 0 is a valid index, but not valid for args[0],
6422                  * so we need to offset by 1.
6423                  */
6424                 phy_idx = cb->args[0] - 1;
6425         } else {
6426                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6427                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6428                                   nl80211_policy);
6429                 if (err)
6430                         goto out_err;
6431
6432                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6433                                                   nl80211_fam.attrbuf);
6434                 if (IS_ERR(rdev)) {
6435                         err = PTR_ERR(rdev);
6436                         goto out_err;
6437                 }
6438                 phy_idx = rdev->wiphy_idx;
6439                 rdev = NULL;
6440
6441                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6442                         cb->args[1] =
6443                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6444         }
6445
6446         if (cb->args[1]) {
6447                 data = nla_data((void *)cb->args[1]);
6448                 data_len = nla_len((void *)cb->args[1]);
6449         }
6450
6451         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6452         if (!rdev) {
6453                 err = -ENOENT;
6454                 goto out_err;
6455         }
6456
6457         if (!rdev->ops->testmode_dump) {
6458                 err = -EOPNOTSUPP;
6459                 goto out_err;
6460         }
6461
6462         while (1) {
6463                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6464                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6465                                            NL80211_CMD_TESTMODE);
6466                 struct nlattr *tmdata;
6467
6468                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6469                         genlmsg_cancel(skb, hdr);
6470                         break;
6471                 }
6472
6473                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6474                 if (!tmdata) {
6475                         genlmsg_cancel(skb, hdr);
6476                         break;
6477                 }
6478                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6479                 nla_nest_end(skb, tmdata);
6480
6481                 if (err == -ENOBUFS || err == -ENOENT) {
6482                         genlmsg_cancel(skb, hdr);
6483                         break;
6484                 } else if (err) {
6485                         genlmsg_cancel(skb, hdr);
6486                         goto out_err;
6487                 }
6488
6489                 genlmsg_end(skb, hdr);
6490         }
6491
6492         err = skb->len;
6493         /* see above */
6494         cb->args[0] = phy_idx + 1;
6495  out_err:
6496         rtnl_unlock();
6497         return err;
6498 }
6499
6500 static struct sk_buff *
6501 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6502                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6503 {
6504         struct sk_buff *skb;
6505         void *hdr;
6506         struct nlattr *data;
6507
6508         skb = nlmsg_new(approxlen + 100, gfp);
6509         if (!skb)
6510                 return NULL;
6511
6512         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6513         if (!hdr) {
6514                 kfree_skb(skb);
6515                 return NULL;
6516         }
6517
6518         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6519                 goto nla_put_failure;
6520         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6521
6522         ((void **)skb->cb)[0] = rdev;
6523         ((void **)skb->cb)[1] = hdr;
6524         ((void **)skb->cb)[2] = data;
6525
6526         return skb;
6527
6528  nla_put_failure:
6529         kfree_skb(skb);
6530         return NULL;
6531 }
6532
6533 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6534                                                   int approxlen)
6535 {
6536         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6537
6538         if (WARN_ON(!rdev->testmode_info))
6539                 return NULL;
6540
6541         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6542                                 rdev->testmode_info->snd_portid,
6543                                 rdev->testmode_info->snd_seq,
6544                                 GFP_KERNEL);
6545 }
6546 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6547
6548 int cfg80211_testmode_reply(struct sk_buff *skb)
6549 {
6550         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6551         void *hdr = ((void **)skb->cb)[1];
6552         struct nlattr *data = ((void **)skb->cb)[2];
6553
6554         if (WARN_ON(!rdev->testmode_info)) {
6555                 kfree_skb(skb);
6556                 return -EINVAL;
6557         }
6558
6559         nla_nest_end(skb, data);
6560         genlmsg_end(skb, hdr);
6561         return genlmsg_reply(skb, rdev->testmode_info);
6562 }
6563 EXPORT_SYMBOL(cfg80211_testmode_reply);
6564
6565 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6566                                                   int approxlen, gfp_t gfp)
6567 {
6568         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6569
6570         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6571 }
6572 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6573
6574 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6575 {
6576         void *hdr = ((void **)skb->cb)[1];
6577         struct nlattr *data = ((void **)skb->cb)[2];
6578
6579         nla_nest_end(skb, data);
6580         genlmsg_end(skb, hdr);
6581         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6582 }
6583 EXPORT_SYMBOL(cfg80211_testmode_event);
6584 #endif
6585
6586 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6587 {
6588         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6589         struct net_device *dev = info->user_ptr[1];
6590         struct cfg80211_connect_params connect;
6591         struct wiphy *wiphy;
6592         struct cfg80211_cached_keys *connkeys = NULL;
6593         int err;
6594
6595         memset(&connect, 0, sizeof(connect));
6596
6597         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6598                 return -EINVAL;
6599
6600         if (!info->attrs[NL80211_ATTR_SSID] ||
6601             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6602                 return -EINVAL;
6603
6604         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6605                 connect.auth_type =
6606                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6607                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6608                                              NL80211_CMD_CONNECT))
6609                         return -EINVAL;
6610         } else
6611                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6612
6613         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6614
6615         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6616                                       NL80211_MAX_NR_CIPHER_SUITES);
6617         if (err)
6618                 return err;
6619
6620         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6621             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6622                 return -EOPNOTSUPP;
6623
6624         wiphy = &rdev->wiphy;
6625
6626         connect.bg_scan_period = -1;
6627         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6628                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6629                 connect.bg_scan_period =
6630                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6631         }
6632
6633         if (info->attrs[NL80211_ATTR_MAC])
6634                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6635         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6636         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6637
6638         if (info->attrs[NL80211_ATTR_IE]) {
6639                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6640                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6641         }
6642
6643         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6644                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6645                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6646                     connect.mfp != NL80211_MFP_NO)
6647                         return -EINVAL;
6648         } else {
6649                 connect.mfp = NL80211_MFP_NO;
6650         }
6651
6652         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6653                 connect.channel =
6654                         ieee80211_get_channel(wiphy,
6655                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6656                 if (!connect.channel ||
6657                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6658                         return -EINVAL;
6659         }
6660
6661         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6662                 connkeys = nl80211_parse_connkeys(rdev,
6663                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6664                 if (IS_ERR(connkeys))
6665                         return PTR_ERR(connkeys);
6666         }
6667
6668         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6669                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6670
6671         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6672                 memcpy(&connect.ht_capa_mask,
6673                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6674                        sizeof(connect.ht_capa_mask));
6675
6676         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6677                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6678                         kfree(connkeys);
6679                         return -EINVAL;
6680                 }
6681                 memcpy(&connect.ht_capa,
6682                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6683                        sizeof(connect.ht_capa));
6684         }
6685
6686         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6687                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6688
6689         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6690                 memcpy(&connect.vht_capa_mask,
6691                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6692                        sizeof(connect.vht_capa_mask));
6693
6694         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6695                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6696                         kfree(connkeys);
6697                         return -EINVAL;
6698                 }
6699                 memcpy(&connect.vht_capa,
6700                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6701                        sizeof(connect.vht_capa));
6702         }
6703
6704         wdev_lock(dev->ieee80211_ptr);
6705         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
6706         wdev_unlock(dev->ieee80211_ptr);
6707         if (err)
6708                 kfree(connkeys);
6709         return err;
6710 }
6711
6712 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6713 {
6714         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6715         struct net_device *dev = info->user_ptr[1];
6716         u16 reason;
6717         int ret;
6718
6719         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6720                 reason = WLAN_REASON_DEAUTH_LEAVING;
6721         else
6722                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6723
6724         if (reason == 0)
6725                 return -EINVAL;
6726
6727         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6728             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6729                 return -EOPNOTSUPP;
6730
6731         wdev_lock(dev->ieee80211_ptr);
6732         ret = cfg80211_disconnect(rdev, dev, reason, true);
6733         wdev_unlock(dev->ieee80211_ptr);
6734         return ret;
6735 }
6736
6737 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6738 {
6739         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6740         struct net *net;
6741         int err;
6742         u32 pid;
6743
6744         if (!info->attrs[NL80211_ATTR_PID])
6745                 return -EINVAL;
6746
6747         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6748
6749         net = get_net_ns_by_pid(pid);
6750         if (IS_ERR(net))
6751                 return PTR_ERR(net);
6752
6753         err = 0;
6754
6755         /* check if anything to do */
6756         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6757                 err = cfg80211_switch_netns(rdev, net);
6758
6759         put_net(net);
6760         return err;
6761 }
6762
6763 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6764 {
6765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6766         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6767                         struct cfg80211_pmksa *pmksa) = NULL;
6768         struct net_device *dev = info->user_ptr[1];
6769         struct cfg80211_pmksa pmksa;
6770
6771         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6772
6773         if (!info->attrs[NL80211_ATTR_MAC])
6774                 return -EINVAL;
6775
6776         if (!info->attrs[NL80211_ATTR_PMKID])
6777                 return -EINVAL;
6778
6779         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6780         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6781
6782         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6783             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6784                 return -EOPNOTSUPP;
6785
6786         switch (info->genlhdr->cmd) {
6787         case NL80211_CMD_SET_PMKSA:
6788                 rdev_ops = rdev->ops->set_pmksa;
6789                 break;
6790         case NL80211_CMD_DEL_PMKSA:
6791                 rdev_ops = rdev->ops->del_pmksa;
6792                 break;
6793         default:
6794                 WARN_ON(1);
6795                 break;
6796         }
6797
6798         if (!rdev_ops)
6799                 return -EOPNOTSUPP;
6800
6801         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6802 }
6803
6804 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6805 {
6806         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6807         struct net_device *dev = info->user_ptr[1];
6808
6809         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6810             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6811                 return -EOPNOTSUPP;
6812
6813         if (!rdev->ops->flush_pmksa)
6814                 return -EOPNOTSUPP;
6815
6816         return rdev_flush_pmksa(rdev, dev);
6817 }
6818
6819 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6820 {
6821         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6822         struct net_device *dev = info->user_ptr[1];
6823         u8 action_code, dialog_token;
6824         u16 status_code;
6825         u8 *peer;
6826
6827         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6828             !rdev->ops->tdls_mgmt)
6829                 return -EOPNOTSUPP;
6830
6831         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6832             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6833             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6834             !info->attrs[NL80211_ATTR_IE] ||
6835             !info->attrs[NL80211_ATTR_MAC])
6836                 return -EINVAL;
6837
6838         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6839         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6840         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6841         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6842
6843         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6844                               dialog_token, status_code,
6845                               nla_data(info->attrs[NL80211_ATTR_IE]),
6846                               nla_len(info->attrs[NL80211_ATTR_IE]));
6847 }
6848
6849 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6850 {
6851         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6852         struct net_device *dev = info->user_ptr[1];
6853         enum nl80211_tdls_operation operation;
6854         u8 *peer;
6855
6856         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6857             !rdev->ops->tdls_oper)
6858                 return -EOPNOTSUPP;
6859
6860         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6861             !info->attrs[NL80211_ATTR_MAC])
6862                 return -EINVAL;
6863
6864         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6865         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6866
6867         return rdev_tdls_oper(rdev, dev, peer, operation);
6868 }
6869
6870 static int nl80211_remain_on_channel(struct sk_buff *skb,
6871                                      struct genl_info *info)
6872 {
6873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6874         struct wireless_dev *wdev = info->user_ptr[1];
6875         struct cfg80211_chan_def chandef;
6876         struct sk_buff *msg;
6877         void *hdr;
6878         u64 cookie;
6879         u32 duration;
6880         int err;
6881
6882         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6883             !info->attrs[NL80211_ATTR_DURATION])
6884                 return -EINVAL;
6885
6886         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6887
6888         if (!rdev->ops->remain_on_channel ||
6889             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6890                 return -EOPNOTSUPP;
6891
6892         /*
6893          * We should be on that channel for at least a minimum amount of
6894          * time (10ms) but no longer than the driver supports.
6895          */
6896         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6897             duration > rdev->wiphy.max_remain_on_channel_duration)
6898                 return -EINVAL;
6899
6900         err = nl80211_parse_chandef(rdev, info, &chandef);
6901         if (err)
6902                 return err;
6903
6904         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6905         if (!msg)
6906                 return -ENOMEM;
6907
6908         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6909                              NL80211_CMD_REMAIN_ON_CHANNEL);
6910
6911         if (IS_ERR(hdr)) {
6912                 err = PTR_ERR(hdr);
6913                 goto free_msg;
6914         }
6915
6916         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6917                                      duration, &cookie);
6918
6919         if (err)
6920                 goto free_msg;
6921
6922         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6923                 goto nla_put_failure;
6924
6925         genlmsg_end(msg, hdr);
6926
6927         return genlmsg_reply(msg, info);
6928
6929  nla_put_failure:
6930         err = -ENOBUFS;
6931  free_msg:
6932         nlmsg_free(msg);
6933         return err;
6934 }
6935
6936 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6937                                             struct genl_info *info)
6938 {
6939         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6940         struct wireless_dev *wdev = info->user_ptr[1];
6941         u64 cookie;
6942
6943         if (!info->attrs[NL80211_ATTR_COOKIE])
6944                 return -EINVAL;
6945
6946         if (!rdev->ops->cancel_remain_on_channel)
6947                 return -EOPNOTSUPP;
6948
6949         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6950
6951         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6952 }
6953
6954 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6955                            u8 *rates, u8 rates_len)
6956 {
6957         u8 i;
6958         u32 mask = 0;
6959
6960         for (i = 0; i < rates_len; i++) {
6961                 int rate = (rates[i] & 0x7f) * 5;
6962                 int ridx;
6963                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6964                         struct ieee80211_rate *srate =
6965                                 &sband->bitrates[ridx];
6966                         if (rate == srate->bitrate) {
6967                                 mask |= 1 << ridx;
6968                                 break;
6969                         }
6970                 }
6971                 if (ridx == sband->n_bitrates)
6972                         return 0; /* rate not found */
6973         }
6974
6975         return mask;
6976 }
6977
6978 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6979                                u8 *rates, u8 rates_len,
6980                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6981 {
6982         u8 i;
6983
6984         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6985
6986         for (i = 0; i < rates_len; i++) {
6987                 int ridx, rbit;
6988
6989                 ridx = rates[i] / 8;
6990                 rbit = BIT(rates[i] % 8);
6991
6992                 /* check validity */
6993                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6994                         return false;
6995
6996                 /* check availability */
6997                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6998                         mcs[ridx] |= rbit;
6999                 else
7000                         return false;
7001         }
7002
7003         return true;
7004 }
7005
7006 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7007         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7008                                     .len = NL80211_MAX_SUPP_RATES },
7009         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7010                                  .len = NL80211_MAX_SUPP_HT_RATES },
7011 };
7012
7013 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7014                                        struct genl_info *info)
7015 {
7016         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7017         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7018         struct cfg80211_bitrate_mask mask;
7019         int rem, i;
7020         struct net_device *dev = info->user_ptr[1];
7021         struct nlattr *tx_rates;
7022         struct ieee80211_supported_band *sband;
7023
7024         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7025                 return -EINVAL;
7026
7027         if (!rdev->ops->set_bitrate_mask)
7028                 return -EOPNOTSUPP;
7029
7030         memset(&mask, 0, sizeof(mask));
7031         /* Default to all rates enabled */
7032         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7033                 sband = rdev->wiphy.bands[i];
7034                 mask.control[i].legacy =
7035                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7036                 if (sband)
7037                         memcpy(mask.control[i].mcs,
7038                                sband->ht_cap.mcs.rx_mask,
7039                                sizeof(mask.control[i].mcs));
7040                 else
7041                         memset(mask.control[i].mcs, 0,
7042                                sizeof(mask.control[i].mcs));
7043         }
7044
7045         /*
7046          * The nested attribute uses enum nl80211_band as the index. This maps
7047          * directly to the enum ieee80211_band values used in cfg80211.
7048          */
7049         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7050         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7051         {
7052                 enum ieee80211_band band = nla_type(tx_rates);
7053                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7054                         return -EINVAL;
7055                 sband = rdev->wiphy.bands[band];
7056                 if (sband == NULL)
7057                         return -EINVAL;
7058                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7059                           nla_len(tx_rates), nl80211_txattr_policy);
7060                 if (tb[NL80211_TXRATE_LEGACY]) {
7061                         mask.control[band].legacy = rateset_to_mask(
7062                                 sband,
7063                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7064                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7065                         if ((mask.control[band].legacy == 0) &&
7066                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7067                                 return -EINVAL;
7068                 }
7069                 if (tb[NL80211_TXRATE_MCS]) {
7070                         if (!ht_rateset_to_mask(
7071                                         sband,
7072                                         nla_data(tb[NL80211_TXRATE_MCS]),
7073                                         nla_len(tb[NL80211_TXRATE_MCS]),
7074                                         mask.control[band].mcs))
7075                                 return -EINVAL;
7076                 }
7077
7078                 if (mask.control[band].legacy == 0) {
7079                         /* don't allow empty legacy rates if HT
7080                          * is not even supported. */
7081                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7082                                 return -EINVAL;
7083
7084                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7085                                 if (mask.control[band].mcs[i])
7086                                         break;
7087
7088                         /* legacy and mcs rates may not be both empty */
7089                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7090                                 return -EINVAL;
7091                 }
7092         }
7093
7094         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7095 }
7096
7097 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7098 {
7099         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7100         struct wireless_dev *wdev = info->user_ptr[1];
7101         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7102
7103         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7104                 return -EINVAL;
7105
7106         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7107                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
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         /* not much point in registering if we can't reply */
7124         if (!rdev->ops->mgmt_tx)
7125                 return -EOPNOTSUPP;
7126
7127         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7128                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7129                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7130 }
7131
7132 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7133 {
7134         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7135         struct wireless_dev *wdev = info->user_ptr[1];
7136         struct cfg80211_chan_def chandef;
7137         int err;
7138         void *hdr = NULL;
7139         u64 cookie;
7140         struct sk_buff *msg = NULL;
7141         unsigned int wait = 0;
7142         bool offchan, no_cck, dont_wait_for_ack;
7143
7144         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7145
7146         if (!info->attrs[NL80211_ATTR_FRAME])
7147                 return -EINVAL;
7148
7149         if (!rdev->ops->mgmt_tx)
7150                 return -EOPNOTSUPP;
7151
7152         switch (wdev->iftype) {
7153         case NL80211_IFTYPE_P2P_DEVICE:
7154                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7155                         return -EINVAL;
7156         case NL80211_IFTYPE_STATION:
7157         case NL80211_IFTYPE_ADHOC:
7158         case NL80211_IFTYPE_P2P_CLIENT:
7159         case NL80211_IFTYPE_AP:
7160         case NL80211_IFTYPE_AP_VLAN:
7161         case NL80211_IFTYPE_MESH_POINT:
7162         case NL80211_IFTYPE_P2P_GO:
7163                 break;
7164         default:
7165                 return -EOPNOTSUPP;
7166         }
7167
7168         if (info->attrs[NL80211_ATTR_DURATION]) {
7169                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7170                         return -EINVAL;
7171                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7172
7173                 /*
7174                  * We should wait on the channel for at least a minimum amount
7175                  * of time (10ms) but no longer than the driver supports.
7176                  */
7177                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7178                     wait > rdev->wiphy.max_remain_on_channel_duration)
7179                         return -EINVAL;
7180
7181         }
7182
7183         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7184
7185         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7186                 return -EINVAL;
7187
7188         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7189
7190         /* get the channel if any has been specified, otherwise pass NULL to
7191          * the driver. The latter will use the current one
7192          */
7193         chandef.chan = NULL;
7194         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7195                 err = nl80211_parse_chandef(rdev, info, &chandef);
7196                 if (err)
7197                         return err;
7198         }
7199
7200         if (!chandef.chan && offchan)
7201                 return -EINVAL;
7202
7203         if (!dont_wait_for_ack) {
7204                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7205                 if (!msg)
7206                         return -ENOMEM;
7207
7208                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7209                                      NL80211_CMD_FRAME);
7210
7211                 if (IS_ERR(hdr)) {
7212                         err = PTR_ERR(hdr);
7213                         goto free_msg;
7214                 }
7215         }
7216
7217         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7218                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7219                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7220                                     no_cck, dont_wait_for_ack, &cookie);
7221         if (err)
7222                 goto free_msg;
7223
7224         if (msg) {
7225                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7226                         goto nla_put_failure;
7227
7228                 genlmsg_end(msg, hdr);
7229                 return genlmsg_reply(msg, info);
7230         }
7231
7232         return 0;
7233
7234  nla_put_failure:
7235         err = -ENOBUFS;
7236  free_msg:
7237         nlmsg_free(msg);
7238         return err;
7239 }
7240
7241 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7242 {
7243         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7244         struct wireless_dev *wdev = info->user_ptr[1];
7245         u64 cookie;
7246
7247         if (!info->attrs[NL80211_ATTR_COOKIE])
7248                 return -EINVAL;
7249
7250         if (!rdev->ops->mgmt_tx_cancel_wait)
7251                 return -EOPNOTSUPP;
7252
7253         switch (wdev->iftype) {
7254         case NL80211_IFTYPE_STATION:
7255         case NL80211_IFTYPE_ADHOC:
7256         case NL80211_IFTYPE_P2P_CLIENT:
7257         case NL80211_IFTYPE_AP:
7258         case NL80211_IFTYPE_AP_VLAN:
7259         case NL80211_IFTYPE_P2P_GO:
7260         case NL80211_IFTYPE_P2P_DEVICE:
7261                 break;
7262         default:
7263                 return -EOPNOTSUPP;
7264         }
7265
7266         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7267
7268         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7269 }
7270
7271 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7272 {
7273         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7274         struct wireless_dev *wdev;
7275         struct net_device *dev = info->user_ptr[1];
7276         u8 ps_state;
7277         bool state;
7278         int err;
7279
7280         if (!info->attrs[NL80211_ATTR_PS_STATE])
7281                 return -EINVAL;
7282
7283         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7284
7285         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7286                 return -EINVAL;
7287
7288         wdev = dev->ieee80211_ptr;
7289
7290         if (!rdev->ops->set_power_mgmt)
7291                 return -EOPNOTSUPP;
7292
7293         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7294
7295         if (state == wdev->ps)
7296                 return 0;
7297
7298         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7299         if (!err)
7300                 wdev->ps = state;
7301         return err;
7302 }
7303
7304 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7305 {
7306         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7307         enum nl80211_ps_state ps_state;
7308         struct wireless_dev *wdev;
7309         struct net_device *dev = info->user_ptr[1];
7310         struct sk_buff *msg;
7311         void *hdr;
7312         int err;
7313
7314         wdev = dev->ieee80211_ptr;
7315
7316         if (!rdev->ops->set_power_mgmt)
7317                 return -EOPNOTSUPP;
7318
7319         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7320         if (!msg)
7321                 return -ENOMEM;
7322
7323         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7324                              NL80211_CMD_GET_POWER_SAVE);
7325         if (!hdr) {
7326                 err = -ENOBUFS;
7327                 goto free_msg;
7328         }
7329
7330         if (wdev->ps)
7331                 ps_state = NL80211_PS_ENABLED;
7332         else
7333                 ps_state = NL80211_PS_DISABLED;
7334
7335         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7336                 goto nla_put_failure;
7337
7338         genlmsg_end(msg, hdr);
7339         return genlmsg_reply(msg, info);
7340
7341  nla_put_failure:
7342         err = -ENOBUFS;
7343  free_msg:
7344         nlmsg_free(msg);
7345         return err;
7346 }
7347
7348 static struct nla_policy
7349 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7350         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7351         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7352         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7353         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7354         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7355         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7356 };
7357
7358 static int nl80211_set_cqm_txe(struct genl_info *info,
7359                                u32 rate, u32 pkts, u32 intvl)
7360 {
7361         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7362         struct wireless_dev *wdev;
7363         struct net_device *dev = info->user_ptr[1];
7364
7365         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7366                 return -EINVAL;
7367
7368         wdev = dev->ieee80211_ptr;
7369
7370         if (!rdev->ops->set_cqm_txe_config)
7371                 return -EOPNOTSUPP;
7372
7373         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7374             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7375                 return -EOPNOTSUPP;
7376
7377         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7378 }
7379
7380 static int nl80211_set_cqm_rssi(struct genl_info *info,
7381                                 s32 threshold, u32 hysteresis)
7382 {
7383         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7384         struct wireless_dev *wdev;
7385         struct net_device *dev = info->user_ptr[1];
7386
7387         if (threshold > 0)
7388                 return -EINVAL;
7389
7390         wdev = dev->ieee80211_ptr;
7391
7392         if (!rdev->ops->set_cqm_rssi_config)
7393                 return -EOPNOTSUPP;
7394
7395         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7396             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7397                 return -EOPNOTSUPP;
7398
7399         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7400 }
7401
7402 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7403 {
7404         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7405         struct nlattr *cqm;
7406         int err;
7407
7408         cqm = info->attrs[NL80211_ATTR_CQM];
7409         if (!cqm) {
7410                 err = -EINVAL;
7411                 goto out;
7412         }
7413
7414         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7415                                nl80211_attr_cqm_policy);
7416         if (err)
7417                 goto out;
7418
7419         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7420             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7421                 s32 threshold;
7422                 u32 hysteresis;
7423                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7424                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7425                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7426         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7427                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7428                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7429                 u32 rate, pkts, intvl;
7430                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7431                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7432                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7433                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7434         } else
7435                 err = -EINVAL;
7436
7437 out:
7438         return err;
7439 }
7440
7441 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7442 {
7443         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7444         struct net_device *dev = info->user_ptr[1];
7445         struct mesh_config cfg;
7446         struct mesh_setup setup;
7447         int err;
7448
7449         /* start with default */
7450         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7451         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7452
7453         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7454                 /* and parse parameters if given */
7455                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7456                 if (err)
7457                         return err;
7458         }
7459
7460         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7461             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7462                 return -EINVAL;
7463
7464         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7465         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7466
7467         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7468             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7469                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7470                         return -EINVAL;
7471
7472         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7473                 setup.beacon_interval =
7474                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7475                 if (setup.beacon_interval < 10 ||
7476                     setup.beacon_interval > 10000)
7477                         return -EINVAL;
7478         }
7479
7480         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7481                 setup.dtim_period =
7482                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7483                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7484                         return -EINVAL;
7485         }
7486
7487         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7488                 /* parse additional setup parameters if given */
7489                 err = nl80211_parse_mesh_setup(info, &setup);
7490                 if (err)
7491                         return err;
7492         }
7493
7494         if (setup.user_mpm)
7495                 cfg.auto_open_plinks = false;
7496
7497         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7498                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7499                 if (err)
7500                         return err;
7501         } else {
7502                 /* cfg80211_join_mesh() will sort it out */
7503                 setup.chandef.chan = NULL;
7504         }
7505
7506         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7507                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7508                 int n_rates =
7509                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7510                 struct ieee80211_supported_band *sband;
7511
7512                 if (!setup.chandef.chan)
7513                         return -EINVAL;
7514
7515                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7516
7517                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7518                                              &setup.basic_rates);
7519                 if (err)
7520                         return err;
7521         }
7522
7523         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7524 }
7525
7526 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7527 {
7528         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7529         struct net_device *dev = info->user_ptr[1];
7530
7531         return cfg80211_leave_mesh(rdev, dev);
7532 }
7533
7534 #ifdef CONFIG_PM
7535 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7536                                         struct cfg80211_registered_device *rdev)
7537 {
7538         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7539         struct nlattr *nl_pats, *nl_pat;
7540         int i, pat_len;
7541
7542         if (!wowlan->n_patterns)
7543                 return 0;
7544
7545         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7546         if (!nl_pats)
7547                 return -ENOBUFS;
7548
7549         for (i = 0; i < wowlan->n_patterns; i++) {
7550                 nl_pat = nla_nest_start(msg, i + 1);
7551                 if (!nl_pat)
7552                         return -ENOBUFS;
7553                 pat_len = wowlan->patterns[i].pattern_len;
7554                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7555                             DIV_ROUND_UP(pat_len, 8),
7556                             wowlan->patterns[i].mask) ||
7557                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7558                             pat_len, wowlan->patterns[i].pattern) ||
7559                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7560                                 wowlan->patterns[i].pkt_offset))
7561                         return -ENOBUFS;
7562                 nla_nest_end(msg, nl_pat);
7563         }
7564         nla_nest_end(msg, nl_pats);
7565
7566         return 0;
7567 }
7568
7569 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7570                                    struct cfg80211_wowlan_tcp *tcp)
7571 {
7572         struct nlattr *nl_tcp;
7573
7574         if (!tcp)
7575                 return 0;
7576
7577         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7578         if (!nl_tcp)
7579                 return -ENOBUFS;
7580
7581         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7582             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7583             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7584             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7585             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7586             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7587                     tcp->payload_len, tcp->payload) ||
7588             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7589                         tcp->data_interval) ||
7590             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7591                     tcp->wake_len, tcp->wake_data) ||
7592             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7593                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7594                 return -ENOBUFS;
7595
7596         if (tcp->payload_seq.len &&
7597             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7598                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7599                 return -ENOBUFS;
7600
7601         if (tcp->payload_tok.len &&
7602             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7603                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7604                     &tcp->payload_tok))
7605                 return -ENOBUFS;
7606
7607         nla_nest_end(msg, nl_tcp);
7608
7609         return 0;
7610 }
7611
7612 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7613 {
7614         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7615         struct sk_buff *msg;
7616         void *hdr;
7617         u32 size = NLMSG_DEFAULT_SIZE;
7618
7619         if (!rdev->wiphy.wowlan)
7620                 return -EOPNOTSUPP;
7621
7622         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7623                 /* adjust size to have room for all the data */
7624                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7625                         rdev->wiphy.wowlan_config->tcp->payload_len +
7626                         rdev->wiphy.wowlan_config->tcp->wake_len +
7627                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7628         }
7629
7630         msg = nlmsg_new(size, GFP_KERNEL);
7631         if (!msg)
7632                 return -ENOMEM;
7633
7634         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7635                              NL80211_CMD_GET_WOWLAN);
7636         if (!hdr)
7637                 goto nla_put_failure;
7638
7639         if (rdev->wiphy.wowlan_config) {
7640                 struct nlattr *nl_wowlan;
7641
7642                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7643                 if (!nl_wowlan)
7644                         goto nla_put_failure;
7645
7646                 if ((rdev->wiphy.wowlan_config->any &&
7647                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7648                     (rdev->wiphy.wowlan_config->disconnect &&
7649                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7650                     (rdev->wiphy.wowlan_config->magic_pkt &&
7651                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7652                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7653                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7654                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7655                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7656                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7657                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7658                     (rdev->wiphy.wowlan_config->rfkill_release &&
7659                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7660                         goto nla_put_failure;
7661
7662                 if (nl80211_send_wowlan_patterns(msg, rdev))
7663                         goto nla_put_failure;
7664
7665                 if (nl80211_send_wowlan_tcp(msg,
7666                                             rdev->wiphy.wowlan_config->tcp))
7667                         goto nla_put_failure;
7668
7669                 nla_nest_end(msg, nl_wowlan);
7670         }
7671
7672         genlmsg_end(msg, hdr);
7673         return genlmsg_reply(msg, info);
7674
7675 nla_put_failure:
7676         nlmsg_free(msg);
7677         return -ENOBUFS;
7678 }
7679
7680 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7681                                     struct nlattr *attr,
7682                                     struct cfg80211_wowlan *trig)
7683 {
7684         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7685         struct cfg80211_wowlan_tcp *cfg;
7686         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7687         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7688         u32 size;
7689         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7690         int err, port;
7691
7692         if (!rdev->wiphy.wowlan->tcp)
7693                 return -EINVAL;
7694
7695         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7696                         nla_data(attr), nla_len(attr),
7697                         nl80211_wowlan_tcp_policy);
7698         if (err)
7699                 return err;
7700
7701         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7702             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7703             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7704             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7705             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7706             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7707             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7708             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7709                 return -EINVAL;
7710
7711         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7712         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
7713                 return -EINVAL;
7714
7715         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7716                         rdev->wiphy.wowlan->tcp->data_interval_max ||
7717             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7718                 return -EINVAL;
7719
7720         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7721         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
7722                 return -EINVAL;
7723
7724         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7725         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7726                 return -EINVAL;
7727
7728         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7729                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7730
7731                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7732                 tokens_size = tokln - sizeof(*tok);
7733
7734                 if (!tok->len || tokens_size % tok->len)
7735                         return -EINVAL;
7736                 if (!rdev->wiphy.wowlan->tcp->tok)
7737                         return -EINVAL;
7738                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
7739                         return -EINVAL;
7740                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
7741                         return -EINVAL;
7742                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
7743                         return -EINVAL;
7744                 if (tok->offset + tok->len > data_size)
7745                         return -EINVAL;
7746         }
7747
7748         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7749                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7750                 if (!rdev->wiphy.wowlan->tcp->seq)
7751                         return -EINVAL;
7752                 if (seq->len == 0 || seq->len > 4)
7753                         return -EINVAL;
7754                 if (seq->len + seq->offset > data_size)
7755                         return -EINVAL;
7756         }
7757
7758         size = sizeof(*cfg);
7759         size += data_size;
7760         size += wake_size + wake_mask_size;
7761         size += tokens_size;
7762
7763         cfg = kzalloc(size, GFP_KERNEL);
7764         if (!cfg)
7765                 return -ENOMEM;
7766         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7767         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7768         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7769                ETH_ALEN);
7770         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7771                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7772         else
7773                 port = 0;
7774 #ifdef CONFIG_INET
7775         /* allocate a socket and port for it and use it */
7776         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7777                             IPPROTO_TCP, &cfg->sock, 1);
7778         if (err) {
7779                 kfree(cfg);
7780                 return err;
7781         }
7782         if (inet_csk_get_port(cfg->sock->sk, port)) {
7783                 sock_release(cfg->sock);
7784                 kfree(cfg);
7785                 return -EADDRINUSE;
7786         }
7787         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7788 #else
7789         if (!port) {
7790                 kfree(cfg);
7791                 return -EINVAL;
7792         }
7793         cfg->src_port = port;
7794 #endif
7795
7796         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7797         cfg->payload_len = data_size;
7798         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7799         memcpy((void *)cfg->payload,
7800                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7801                data_size);
7802         if (seq)
7803                 cfg->payload_seq = *seq;
7804         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7805         cfg->wake_len = wake_size;
7806         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7807         memcpy((void *)cfg->wake_data,
7808                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7809                wake_size);
7810         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7811                          data_size + wake_size;
7812         memcpy((void *)cfg->wake_mask,
7813                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7814                wake_mask_size);
7815         if (tok) {
7816                 cfg->tokens_size = tokens_size;
7817                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7818         }
7819
7820         trig->tcp = cfg;
7821
7822         return 0;
7823 }
7824
7825 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7826 {
7827         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7828         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7829         struct cfg80211_wowlan new_triggers = {};
7830         struct cfg80211_wowlan *ntrig;
7831         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
7832         int err, i;
7833         bool prev_enabled = rdev->wiphy.wowlan_config;
7834
7835         if (!wowlan)
7836                 return -EOPNOTSUPP;
7837
7838         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7839                 cfg80211_rdev_free_wowlan(rdev);
7840                 rdev->wiphy.wowlan_config = NULL;
7841                 goto set_wakeup;
7842         }
7843
7844         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7845                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7846                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7847                         nl80211_wowlan_policy);
7848         if (err)
7849                 return err;
7850
7851         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7852                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7853                         return -EINVAL;
7854                 new_triggers.any = true;
7855         }
7856
7857         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7858                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7859                         return -EINVAL;
7860                 new_triggers.disconnect = true;
7861         }
7862
7863         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7864                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7865                         return -EINVAL;
7866                 new_triggers.magic_pkt = true;
7867         }
7868
7869         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7870                 return -EINVAL;
7871
7872         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7873                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7874                         return -EINVAL;
7875                 new_triggers.gtk_rekey_failure = true;
7876         }
7877
7878         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7879                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7880                         return -EINVAL;
7881                 new_triggers.eap_identity_req = true;
7882         }
7883
7884         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7885                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7886                         return -EINVAL;
7887                 new_triggers.four_way_handshake = true;
7888         }
7889
7890         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7891                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7892                         return -EINVAL;
7893                 new_triggers.rfkill_release = true;
7894         }
7895
7896         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7897                 struct nlattr *pat;
7898                 int n_patterns = 0;
7899                 int rem, pat_len, mask_len, pkt_offset;
7900                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7901
7902                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7903                                     rem)
7904                         n_patterns++;
7905                 if (n_patterns > wowlan->n_patterns)
7906                         return -EINVAL;
7907
7908                 new_triggers.patterns = kcalloc(n_patterns,
7909                                                 sizeof(new_triggers.patterns[0]),
7910                                                 GFP_KERNEL);
7911                 if (!new_triggers.patterns)
7912                         return -ENOMEM;
7913
7914                 new_triggers.n_patterns = n_patterns;
7915                 i = 0;
7916
7917                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7918                                     rem) {
7919                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7920                                   nla_data(pat), nla_len(pat), NULL);
7921                         err = -EINVAL;
7922                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7923                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7924                                 goto error;
7925                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7926                         mask_len = DIV_ROUND_UP(pat_len, 8);
7927                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7928                             mask_len)
7929                                 goto error;
7930                         if (pat_len > wowlan->pattern_max_len ||
7931                             pat_len < wowlan->pattern_min_len)
7932                                 goto error;
7933
7934                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7935                                 pkt_offset = 0;
7936                         else
7937                                 pkt_offset = nla_get_u32(
7938                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7939                         if (pkt_offset > wowlan->max_pkt_offset)
7940                                 goto error;
7941                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7942
7943                         new_triggers.patterns[i].mask =
7944                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7945                         if (!new_triggers.patterns[i].mask) {
7946                                 err = -ENOMEM;
7947                                 goto error;
7948                         }
7949                         new_triggers.patterns[i].pattern =
7950                                 new_triggers.patterns[i].mask + mask_len;
7951                         memcpy(new_triggers.patterns[i].mask,
7952                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7953                                mask_len);
7954                         new_triggers.patterns[i].pattern_len = pat_len;
7955                         memcpy(new_triggers.patterns[i].pattern,
7956                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7957                                pat_len);
7958                         i++;
7959                 }
7960         }
7961
7962         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7963                 err = nl80211_parse_wowlan_tcp(
7964                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7965                         &new_triggers);
7966                 if (err)
7967                         goto error;
7968         }
7969
7970         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7971         if (!ntrig) {
7972                 err = -ENOMEM;
7973                 goto error;
7974         }
7975         cfg80211_rdev_free_wowlan(rdev);
7976         rdev->wiphy.wowlan_config = ntrig;
7977
7978  set_wakeup:
7979         if (rdev->ops->set_wakeup &&
7980             prev_enabled != !!rdev->wiphy.wowlan_config)
7981                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
7982
7983         return 0;
7984  error:
7985         for (i = 0; i < new_triggers.n_patterns; i++)
7986                 kfree(new_triggers.patterns[i].mask);
7987         kfree(new_triggers.patterns);
7988         if (new_triggers.tcp && new_triggers.tcp->sock)
7989                 sock_release(new_triggers.tcp->sock);
7990         kfree(new_triggers.tcp);
7991         return err;
7992 }
7993 #endif
7994
7995 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7996 {
7997         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7998         struct net_device *dev = info->user_ptr[1];
7999         struct wireless_dev *wdev = dev->ieee80211_ptr;
8000         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8001         struct cfg80211_gtk_rekey_data rekey_data;
8002         int err;
8003
8004         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8005                 return -EINVAL;
8006
8007         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8008                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8009                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8010                         nl80211_rekey_policy);
8011         if (err)
8012                 return err;
8013
8014         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8015                 return -ERANGE;
8016         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8017                 return -ERANGE;
8018         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8019                 return -ERANGE;
8020
8021         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8022                NL80211_KEK_LEN);
8023         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8024                NL80211_KCK_LEN);
8025         memcpy(rekey_data.replay_ctr,
8026                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8027                NL80211_REPLAY_CTR_LEN);
8028
8029         wdev_lock(wdev);
8030         if (!wdev->current_bss) {
8031                 err = -ENOTCONN;
8032                 goto out;
8033         }
8034
8035         if (!rdev->ops->set_rekey_data) {
8036                 err = -EOPNOTSUPP;
8037                 goto out;
8038         }
8039
8040         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8041  out:
8042         wdev_unlock(wdev);
8043         return err;
8044 }
8045
8046 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8047                                              struct genl_info *info)
8048 {
8049         struct net_device *dev = info->user_ptr[1];
8050         struct wireless_dev *wdev = dev->ieee80211_ptr;
8051
8052         if (wdev->iftype != NL80211_IFTYPE_AP &&
8053             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8054                 return -EINVAL;
8055
8056         if (wdev->ap_unexpected_nlportid)
8057                 return -EBUSY;
8058
8059         wdev->ap_unexpected_nlportid = info->snd_portid;
8060         return 0;
8061 }
8062
8063 static int nl80211_probe_client(struct sk_buff *skb,
8064                                 struct genl_info *info)
8065 {
8066         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8067         struct net_device *dev = info->user_ptr[1];
8068         struct wireless_dev *wdev = dev->ieee80211_ptr;
8069         struct sk_buff *msg;
8070         void *hdr;
8071         const u8 *addr;
8072         u64 cookie;
8073         int err;
8074
8075         if (wdev->iftype != NL80211_IFTYPE_AP &&
8076             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8077                 return -EOPNOTSUPP;
8078
8079         if (!info->attrs[NL80211_ATTR_MAC])
8080                 return -EINVAL;
8081
8082         if (!rdev->ops->probe_client)
8083                 return -EOPNOTSUPP;
8084
8085         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8086         if (!msg)
8087                 return -ENOMEM;
8088
8089         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8090                              NL80211_CMD_PROBE_CLIENT);
8091
8092         if (IS_ERR(hdr)) {
8093                 err = PTR_ERR(hdr);
8094                 goto free_msg;
8095         }
8096
8097         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8098
8099         err = rdev_probe_client(rdev, dev, addr, &cookie);
8100         if (err)
8101                 goto free_msg;
8102
8103         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8104                 goto nla_put_failure;
8105
8106         genlmsg_end(msg, hdr);
8107
8108         return genlmsg_reply(msg, info);
8109
8110  nla_put_failure:
8111         err = -ENOBUFS;
8112  free_msg:
8113         nlmsg_free(msg);
8114         return err;
8115 }
8116
8117 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8118 {
8119         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8120         struct cfg80211_beacon_registration *reg, *nreg;
8121         int rv;
8122
8123         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8124                 return -EOPNOTSUPP;
8125
8126         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8127         if (!nreg)
8128                 return -ENOMEM;
8129
8130         /* First, check if already registered. */
8131         spin_lock_bh(&rdev->beacon_registrations_lock);
8132         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8133                 if (reg->nlportid == info->snd_portid) {
8134                         rv = -EALREADY;
8135                         goto out_err;
8136                 }
8137         }
8138         /* Add it to the list */
8139         nreg->nlportid = info->snd_portid;
8140         list_add(&nreg->list, &rdev->beacon_registrations);
8141
8142         spin_unlock_bh(&rdev->beacon_registrations_lock);
8143
8144         return 0;
8145 out_err:
8146         spin_unlock_bh(&rdev->beacon_registrations_lock);
8147         kfree(nreg);
8148         return rv;
8149 }
8150
8151 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8152 {
8153         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8154         struct wireless_dev *wdev = info->user_ptr[1];
8155         int err;
8156
8157         if (!rdev->ops->start_p2p_device)
8158                 return -EOPNOTSUPP;
8159
8160         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8161                 return -EOPNOTSUPP;
8162
8163         if (wdev->p2p_started)
8164                 return 0;
8165
8166         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8167         if (err)
8168                 return err;
8169
8170         err = rdev_start_p2p_device(rdev, wdev);
8171         if (err)
8172                 return err;
8173
8174         wdev->p2p_started = true;
8175         rdev->opencount++;
8176
8177         return 0;
8178 }
8179
8180 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8181 {
8182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8183         struct wireless_dev *wdev = info->user_ptr[1];
8184
8185         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8186                 return -EOPNOTSUPP;
8187
8188         if (!rdev->ops->stop_p2p_device)
8189                 return -EOPNOTSUPP;
8190
8191         cfg80211_stop_p2p_device(rdev, wdev);
8192
8193         return 0;
8194 }
8195
8196 static int nl80211_get_protocol_features(struct sk_buff *skb,
8197                                          struct genl_info *info)
8198 {
8199         void *hdr;
8200         struct sk_buff *msg;
8201
8202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8203         if (!msg)
8204                 return -ENOMEM;
8205
8206         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8207                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8208         if (!hdr)
8209                 goto nla_put_failure;
8210
8211         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8212                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8213                 goto nla_put_failure;
8214
8215         genlmsg_end(msg, hdr);
8216         return genlmsg_reply(msg, info);
8217
8218  nla_put_failure:
8219         kfree_skb(msg);
8220         return -ENOBUFS;
8221 }
8222
8223 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8224 {
8225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8226         struct cfg80211_update_ft_ies_params ft_params;
8227         struct net_device *dev = info->user_ptr[1];
8228
8229         if (!rdev->ops->update_ft_ies)
8230                 return -EOPNOTSUPP;
8231
8232         if (!info->attrs[NL80211_ATTR_MDID] ||
8233             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8234                 return -EINVAL;
8235
8236         memset(&ft_params, 0, sizeof(ft_params));
8237         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8238         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8239         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8240
8241         return rdev_update_ft_ies(rdev, dev, &ft_params);
8242 }
8243
8244 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8245                                        struct genl_info *info)
8246 {
8247         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8248         struct wireless_dev *wdev = info->user_ptr[1];
8249         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8250         u16 duration;
8251         int ret;
8252
8253         if (!rdev->ops->crit_proto_start)
8254                 return -EOPNOTSUPP;
8255
8256         if (WARN_ON(!rdev->ops->crit_proto_stop))
8257                 return -EINVAL;
8258
8259         if (rdev->crit_proto_nlportid)
8260                 return -EBUSY;
8261
8262         /* determine protocol if provided */
8263         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8264                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8265
8266         if (proto >= NUM_NL80211_CRIT_PROTO)
8267                 return -EINVAL;
8268
8269         /* timeout must be provided */
8270         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8271                 return -EINVAL;
8272
8273         duration =
8274                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8275
8276         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8277                 return -ERANGE;
8278
8279         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8280         if (!ret)
8281                 rdev->crit_proto_nlportid = info->snd_portid;
8282
8283         return ret;
8284 }
8285
8286 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8287                                       struct genl_info *info)
8288 {
8289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8290         struct wireless_dev *wdev = info->user_ptr[1];
8291
8292         if (!rdev->ops->crit_proto_stop)
8293                 return -EOPNOTSUPP;
8294
8295         if (rdev->crit_proto_nlportid) {
8296                 rdev->crit_proto_nlportid = 0;
8297                 rdev_crit_proto_stop(rdev, wdev);
8298         }
8299         return 0;
8300 }
8301
8302 #define NL80211_FLAG_NEED_WIPHY         0x01
8303 #define NL80211_FLAG_NEED_NETDEV        0x02
8304 #define NL80211_FLAG_NEED_RTNL          0x04
8305 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8306 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8307                                          NL80211_FLAG_CHECK_NETDEV_UP)
8308 #define NL80211_FLAG_NEED_WDEV          0x10
8309 /* If a netdev is associated, it must be UP, P2P must be started */
8310 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8311                                          NL80211_FLAG_CHECK_NETDEV_UP)
8312
8313 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8314                             struct genl_info *info)
8315 {
8316         struct cfg80211_registered_device *rdev;
8317         struct wireless_dev *wdev;
8318         struct net_device *dev;
8319         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8320
8321         if (rtnl)
8322                 rtnl_lock();
8323
8324         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8325                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8326                 if (IS_ERR(rdev)) {
8327                         if (rtnl)
8328                                 rtnl_unlock();
8329                         return PTR_ERR(rdev);
8330                 }
8331                 info->user_ptr[0] = rdev;
8332         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8333                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8334                 ASSERT_RTNL();
8335
8336                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8337                                                   info->attrs);
8338                 if (IS_ERR(wdev)) {
8339                         if (rtnl)
8340                                 rtnl_unlock();
8341                         return PTR_ERR(wdev);
8342                 }
8343
8344                 dev = wdev->netdev;
8345                 rdev = wiphy_to_dev(wdev->wiphy);
8346
8347                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8348                         if (!dev) {
8349                                 if (rtnl)
8350                                         rtnl_unlock();
8351                                 return -EINVAL;
8352                         }
8353
8354                         info->user_ptr[1] = dev;
8355                 } else {
8356                         info->user_ptr[1] = wdev;
8357                 }
8358
8359                 if (dev) {
8360                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8361                             !netif_running(dev)) {
8362                                 if (rtnl)
8363                                         rtnl_unlock();
8364                                 return -ENETDOWN;
8365                         }
8366
8367                         dev_hold(dev);
8368                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8369                         if (!wdev->p2p_started) {
8370                                 if (rtnl)
8371                                         rtnl_unlock();
8372                                 return -ENETDOWN;
8373                         }
8374                 }
8375
8376                 info->user_ptr[0] = rdev;
8377         }
8378
8379         return 0;
8380 }
8381
8382 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8383                               struct genl_info *info)
8384 {
8385         if (info->user_ptr[1]) {
8386                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8387                         struct wireless_dev *wdev = info->user_ptr[1];
8388
8389                         if (wdev->netdev)
8390                                 dev_put(wdev->netdev);
8391                 } else {
8392                         dev_put(info->user_ptr[1]);
8393                 }
8394         }
8395         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8396                 rtnl_unlock();
8397 }
8398
8399 static struct genl_ops nl80211_ops[] = {
8400         {
8401                 .cmd = NL80211_CMD_GET_WIPHY,
8402                 .doit = nl80211_get_wiphy,
8403                 .dumpit = nl80211_dump_wiphy,
8404                 .policy = nl80211_policy,
8405                 /* can be retrieved by unprivileged users */
8406                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8407                                   NL80211_FLAG_NEED_RTNL,
8408         },
8409         {
8410                 .cmd = NL80211_CMD_SET_WIPHY,
8411                 .doit = nl80211_set_wiphy,
8412                 .policy = nl80211_policy,
8413                 .flags = GENL_ADMIN_PERM,
8414                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8415         },
8416         {
8417                 .cmd = NL80211_CMD_GET_INTERFACE,
8418                 .doit = nl80211_get_interface,
8419                 .dumpit = nl80211_dump_interface,
8420                 .policy = nl80211_policy,
8421                 /* can be retrieved by unprivileged users */
8422                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8423                                   NL80211_FLAG_NEED_RTNL,
8424         },
8425         {
8426                 .cmd = NL80211_CMD_SET_INTERFACE,
8427                 .doit = nl80211_set_interface,
8428                 .policy = nl80211_policy,
8429                 .flags = GENL_ADMIN_PERM,
8430                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8431                                   NL80211_FLAG_NEED_RTNL,
8432         },
8433         {
8434                 .cmd = NL80211_CMD_NEW_INTERFACE,
8435                 .doit = nl80211_new_interface,
8436                 .policy = nl80211_policy,
8437                 .flags = GENL_ADMIN_PERM,
8438                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8439                                   NL80211_FLAG_NEED_RTNL,
8440         },
8441         {
8442                 .cmd = NL80211_CMD_DEL_INTERFACE,
8443                 .doit = nl80211_del_interface,
8444                 .policy = nl80211_policy,
8445                 .flags = GENL_ADMIN_PERM,
8446                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8447                                   NL80211_FLAG_NEED_RTNL,
8448         },
8449         {
8450                 .cmd = NL80211_CMD_GET_KEY,
8451                 .doit = nl80211_get_key,
8452                 .policy = nl80211_policy,
8453                 .flags = GENL_ADMIN_PERM,
8454                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8455                                   NL80211_FLAG_NEED_RTNL,
8456         },
8457         {
8458                 .cmd = NL80211_CMD_SET_KEY,
8459                 .doit = nl80211_set_key,
8460                 .policy = nl80211_policy,
8461                 .flags = GENL_ADMIN_PERM,
8462                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8463                                   NL80211_FLAG_NEED_RTNL,
8464         },
8465         {
8466                 .cmd = NL80211_CMD_NEW_KEY,
8467                 .doit = nl80211_new_key,
8468                 .policy = nl80211_policy,
8469                 .flags = GENL_ADMIN_PERM,
8470                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8471                                   NL80211_FLAG_NEED_RTNL,
8472         },
8473         {
8474                 .cmd = NL80211_CMD_DEL_KEY,
8475                 .doit = nl80211_del_key,
8476                 .policy = nl80211_policy,
8477                 .flags = GENL_ADMIN_PERM,
8478                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8479                                   NL80211_FLAG_NEED_RTNL,
8480         },
8481         {
8482                 .cmd = NL80211_CMD_SET_BEACON,
8483                 .policy = nl80211_policy,
8484                 .flags = GENL_ADMIN_PERM,
8485                 .doit = nl80211_set_beacon,
8486                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8487                                   NL80211_FLAG_NEED_RTNL,
8488         },
8489         {
8490                 .cmd = NL80211_CMD_START_AP,
8491                 .policy = nl80211_policy,
8492                 .flags = GENL_ADMIN_PERM,
8493                 .doit = nl80211_start_ap,
8494                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8495                                   NL80211_FLAG_NEED_RTNL,
8496         },
8497         {
8498                 .cmd = NL80211_CMD_STOP_AP,
8499                 .policy = nl80211_policy,
8500                 .flags = GENL_ADMIN_PERM,
8501                 .doit = nl80211_stop_ap,
8502                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8503                                   NL80211_FLAG_NEED_RTNL,
8504         },
8505         {
8506                 .cmd = NL80211_CMD_GET_STATION,
8507                 .doit = nl80211_get_station,
8508                 .dumpit = nl80211_dump_station,
8509                 .policy = nl80211_policy,
8510                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8511                                   NL80211_FLAG_NEED_RTNL,
8512         },
8513         {
8514                 .cmd = NL80211_CMD_SET_STATION,
8515                 .doit = nl80211_set_station,
8516                 .policy = nl80211_policy,
8517                 .flags = GENL_ADMIN_PERM,
8518                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8519                                   NL80211_FLAG_NEED_RTNL,
8520         },
8521         {
8522                 .cmd = NL80211_CMD_NEW_STATION,
8523                 .doit = nl80211_new_station,
8524                 .policy = nl80211_policy,
8525                 .flags = GENL_ADMIN_PERM,
8526                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8527                                   NL80211_FLAG_NEED_RTNL,
8528         },
8529         {
8530                 .cmd = NL80211_CMD_DEL_STATION,
8531                 .doit = nl80211_del_station,
8532                 .policy = nl80211_policy,
8533                 .flags = GENL_ADMIN_PERM,
8534                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8535                                   NL80211_FLAG_NEED_RTNL,
8536         },
8537         {
8538                 .cmd = NL80211_CMD_GET_MPATH,
8539                 .doit = nl80211_get_mpath,
8540                 .dumpit = nl80211_dump_mpath,
8541                 .policy = nl80211_policy,
8542                 .flags = GENL_ADMIN_PERM,
8543                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8544                                   NL80211_FLAG_NEED_RTNL,
8545         },
8546         {
8547                 .cmd = NL80211_CMD_SET_MPATH,
8548                 .doit = nl80211_set_mpath,
8549                 .policy = nl80211_policy,
8550                 .flags = GENL_ADMIN_PERM,
8551                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8552                                   NL80211_FLAG_NEED_RTNL,
8553         },
8554         {
8555                 .cmd = NL80211_CMD_NEW_MPATH,
8556                 .doit = nl80211_new_mpath,
8557                 .policy = nl80211_policy,
8558                 .flags = GENL_ADMIN_PERM,
8559                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8560                                   NL80211_FLAG_NEED_RTNL,
8561         },
8562         {
8563                 .cmd = NL80211_CMD_DEL_MPATH,
8564                 .doit = nl80211_del_mpath,
8565                 .policy = nl80211_policy,
8566                 .flags = GENL_ADMIN_PERM,
8567                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8568                                   NL80211_FLAG_NEED_RTNL,
8569         },
8570         {
8571                 .cmd = NL80211_CMD_SET_BSS,
8572                 .doit = nl80211_set_bss,
8573                 .policy = nl80211_policy,
8574                 .flags = GENL_ADMIN_PERM,
8575                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8576                                   NL80211_FLAG_NEED_RTNL,
8577         },
8578         {
8579                 .cmd = NL80211_CMD_GET_REG,
8580                 .doit = nl80211_get_reg,
8581                 .policy = nl80211_policy,
8582                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8583                 /* can be retrieved by unprivileged users */
8584         },
8585         {
8586                 .cmd = NL80211_CMD_SET_REG,
8587                 .doit = nl80211_set_reg,
8588                 .policy = nl80211_policy,
8589                 .flags = GENL_ADMIN_PERM,
8590                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8591         },
8592         {
8593                 .cmd = NL80211_CMD_REQ_SET_REG,
8594                 .doit = nl80211_req_set_reg,
8595                 .policy = nl80211_policy,
8596                 .flags = GENL_ADMIN_PERM,
8597         },
8598         {
8599                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8600                 .doit = nl80211_get_mesh_config,
8601                 .policy = nl80211_policy,
8602                 /* can be retrieved by unprivileged users */
8603                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8604                                   NL80211_FLAG_NEED_RTNL,
8605         },
8606         {
8607                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8608                 .doit = nl80211_update_mesh_config,
8609                 .policy = nl80211_policy,
8610                 .flags = GENL_ADMIN_PERM,
8611                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8612                                   NL80211_FLAG_NEED_RTNL,
8613         },
8614         {
8615                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8616                 .doit = nl80211_trigger_scan,
8617                 .policy = nl80211_policy,
8618                 .flags = GENL_ADMIN_PERM,
8619                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8620                                   NL80211_FLAG_NEED_RTNL,
8621         },
8622         {
8623                 .cmd = NL80211_CMD_GET_SCAN,
8624                 .policy = nl80211_policy,
8625                 .dumpit = nl80211_dump_scan,
8626         },
8627         {
8628                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8629                 .doit = nl80211_start_sched_scan,
8630                 .policy = nl80211_policy,
8631                 .flags = GENL_ADMIN_PERM,
8632                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8633                                   NL80211_FLAG_NEED_RTNL,
8634         },
8635         {
8636                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8637                 .doit = nl80211_stop_sched_scan,
8638                 .policy = nl80211_policy,
8639                 .flags = GENL_ADMIN_PERM,
8640                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8641                                   NL80211_FLAG_NEED_RTNL,
8642         },
8643         {
8644                 .cmd = NL80211_CMD_AUTHENTICATE,
8645                 .doit = nl80211_authenticate,
8646                 .policy = nl80211_policy,
8647                 .flags = GENL_ADMIN_PERM,
8648                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8649                                   NL80211_FLAG_NEED_RTNL,
8650         },
8651         {
8652                 .cmd = NL80211_CMD_ASSOCIATE,
8653                 .doit = nl80211_associate,
8654                 .policy = nl80211_policy,
8655                 .flags = GENL_ADMIN_PERM,
8656                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8657                                   NL80211_FLAG_NEED_RTNL,
8658         },
8659         {
8660                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8661                 .doit = nl80211_deauthenticate,
8662                 .policy = nl80211_policy,
8663                 .flags = GENL_ADMIN_PERM,
8664                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8665                                   NL80211_FLAG_NEED_RTNL,
8666         },
8667         {
8668                 .cmd = NL80211_CMD_DISASSOCIATE,
8669                 .doit = nl80211_disassociate,
8670                 .policy = nl80211_policy,
8671                 .flags = GENL_ADMIN_PERM,
8672                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8673                                   NL80211_FLAG_NEED_RTNL,
8674         },
8675         {
8676                 .cmd = NL80211_CMD_JOIN_IBSS,
8677                 .doit = nl80211_join_ibss,
8678                 .policy = nl80211_policy,
8679                 .flags = GENL_ADMIN_PERM,
8680                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8681                                   NL80211_FLAG_NEED_RTNL,
8682         },
8683         {
8684                 .cmd = NL80211_CMD_LEAVE_IBSS,
8685                 .doit = nl80211_leave_ibss,
8686                 .policy = nl80211_policy,
8687                 .flags = GENL_ADMIN_PERM,
8688                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8689                                   NL80211_FLAG_NEED_RTNL,
8690         },
8691 #ifdef CONFIG_NL80211_TESTMODE
8692         {
8693                 .cmd = NL80211_CMD_TESTMODE,
8694                 .doit = nl80211_testmode_do,
8695                 .dumpit = nl80211_testmode_dump,
8696                 .policy = nl80211_policy,
8697                 .flags = GENL_ADMIN_PERM,
8698                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8699                                   NL80211_FLAG_NEED_RTNL,
8700         },
8701 #endif
8702         {
8703                 .cmd = NL80211_CMD_CONNECT,
8704                 .doit = nl80211_connect,
8705                 .policy = nl80211_policy,
8706                 .flags = GENL_ADMIN_PERM,
8707                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8708                                   NL80211_FLAG_NEED_RTNL,
8709         },
8710         {
8711                 .cmd = NL80211_CMD_DISCONNECT,
8712                 .doit = nl80211_disconnect,
8713                 .policy = nl80211_policy,
8714                 .flags = GENL_ADMIN_PERM,
8715                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8716                                   NL80211_FLAG_NEED_RTNL,
8717         },
8718         {
8719                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8720                 .doit = nl80211_wiphy_netns,
8721                 .policy = nl80211_policy,
8722                 .flags = GENL_ADMIN_PERM,
8723                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8724                                   NL80211_FLAG_NEED_RTNL,
8725         },
8726         {
8727                 .cmd = NL80211_CMD_GET_SURVEY,
8728                 .policy = nl80211_policy,
8729                 .dumpit = nl80211_dump_survey,
8730         },
8731         {
8732                 .cmd = NL80211_CMD_SET_PMKSA,
8733                 .doit = nl80211_setdel_pmksa,
8734                 .policy = nl80211_policy,
8735                 .flags = GENL_ADMIN_PERM,
8736                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8737                                   NL80211_FLAG_NEED_RTNL,
8738         },
8739         {
8740                 .cmd = NL80211_CMD_DEL_PMKSA,
8741                 .doit = nl80211_setdel_pmksa,
8742                 .policy = nl80211_policy,
8743                 .flags = GENL_ADMIN_PERM,
8744                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8745                                   NL80211_FLAG_NEED_RTNL,
8746         },
8747         {
8748                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8749                 .doit = nl80211_flush_pmksa,
8750                 .policy = nl80211_policy,
8751                 .flags = GENL_ADMIN_PERM,
8752                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8753                                   NL80211_FLAG_NEED_RTNL,
8754         },
8755         {
8756                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8757                 .doit = nl80211_remain_on_channel,
8758                 .policy = nl80211_policy,
8759                 .flags = GENL_ADMIN_PERM,
8760                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8761                                   NL80211_FLAG_NEED_RTNL,
8762         },
8763         {
8764                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8765                 .doit = nl80211_cancel_remain_on_channel,
8766                 .policy = nl80211_policy,
8767                 .flags = GENL_ADMIN_PERM,
8768                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8769                                   NL80211_FLAG_NEED_RTNL,
8770         },
8771         {
8772                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8773                 .doit = nl80211_set_tx_bitrate_mask,
8774                 .policy = nl80211_policy,
8775                 .flags = GENL_ADMIN_PERM,
8776                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8777                                   NL80211_FLAG_NEED_RTNL,
8778         },
8779         {
8780                 .cmd = NL80211_CMD_REGISTER_FRAME,
8781                 .doit = nl80211_register_mgmt,
8782                 .policy = nl80211_policy,
8783                 .flags = GENL_ADMIN_PERM,
8784                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8785                                   NL80211_FLAG_NEED_RTNL,
8786         },
8787         {
8788                 .cmd = NL80211_CMD_FRAME,
8789                 .doit = nl80211_tx_mgmt,
8790                 .policy = nl80211_policy,
8791                 .flags = GENL_ADMIN_PERM,
8792                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8793                                   NL80211_FLAG_NEED_RTNL,
8794         },
8795         {
8796                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8797                 .doit = nl80211_tx_mgmt_cancel_wait,
8798                 .policy = nl80211_policy,
8799                 .flags = GENL_ADMIN_PERM,
8800                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8801                                   NL80211_FLAG_NEED_RTNL,
8802         },
8803         {
8804                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8805                 .doit = nl80211_set_power_save,
8806                 .policy = nl80211_policy,
8807                 .flags = GENL_ADMIN_PERM,
8808                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8809                                   NL80211_FLAG_NEED_RTNL,
8810         },
8811         {
8812                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8813                 .doit = nl80211_get_power_save,
8814                 .policy = nl80211_policy,
8815                 /* can be retrieved by unprivileged users */
8816                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8817                                   NL80211_FLAG_NEED_RTNL,
8818         },
8819         {
8820                 .cmd = NL80211_CMD_SET_CQM,
8821                 .doit = nl80211_set_cqm,
8822                 .policy = nl80211_policy,
8823                 .flags = GENL_ADMIN_PERM,
8824                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8825                                   NL80211_FLAG_NEED_RTNL,
8826         },
8827         {
8828                 .cmd = NL80211_CMD_SET_CHANNEL,
8829                 .doit = nl80211_set_channel,
8830                 .policy = nl80211_policy,
8831                 .flags = GENL_ADMIN_PERM,
8832                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8833                                   NL80211_FLAG_NEED_RTNL,
8834         },
8835         {
8836                 .cmd = NL80211_CMD_SET_WDS_PEER,
8837                 .doit = nl80211_set_wds_peer,
8838                 .policy = nl80211_policy,
8839                 .flags = GENL_ADMIN_PERM,
8840                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8841                                   NL80211_FLAG_NEED_RTNL,
8842         },
8843         {
8844                 .cmd = NL80211_CMD_JOIN_MESH,
8845                 .doit = nl80211_join_mesh,
8846                 .policy = nl80211_policy,
8847                 .flags = GENL_ADMIN_PERM,
8848                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8849                                   NL80211_FLAG_NEED_RTNL,
8850         },
8851         {
8852                 .cmd = NL80211_CMD_LEAVE_MESH,
8853                 .doit = nl80211_leave_mesh,
8854                 .policy = nl80211_policy,
8855                 .flags = GENL_ADMIN_PERM,
8856                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8857                                   NL80211_FLAG_NEED_RTNL,
8858         },
8859 #ifdef CONFIG_PM
8860         {
8861                 .cmd = NL80211_CMD_GET_WOWLAN,
8862                 .doit = nl80211_get_wowlan,
8863                 .policy = nl80211_policy,
8864                 /* can be retrieved by unprivileged users */
8865                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8866                                   NL80211_FLAG_NEED_RTNL,
8867         },
8868         {
8869                 .cmd = NL80211_CMD_SET_WOWLAN,
8870                 .doit = nl80211_set_wowlan,
8871                 .policy = nl80211_policy,
8872                 .flags = GENL_ADMIN_PERM,
8873                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8874                                   NL80211_FLAG_NEED_RTNL,
8875         },
8876 #endif
8877         {
8878                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8879                 .doit = nl80211_set_rekey_data,
8880                 .policy = nl80211_policy,
8881                 .flags = GENL_ADMIN_PERM,
8882                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8883                                   NL80211_FLAG_NEED_RTNL,
8884         },
8885         {
8886                 .cmd = NL80211_CMD_TDLS_MGMT,
8887                 .doit = nl80211_tdls_mgmt,
8888                 .policy = nl80211_policy,
8889                 .flags = GENL_ADMIN_PERM,
8890                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8891                                   NL80211_FLAG_NEED_RTNL,
8892         },
8893         {
8894                 .cmd = NL80211_CMD_TDLS_OPER,
8895                 .doit = nl80211_tdls_oper,
8896                 .policy = nl80211_policy,
8897                 .flags = GENL_ADMIN_PERM,
8898                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8899                                   NL80211_FLAG_NEED_RTNL,
8900         },
8901         {
8902                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8903                 .doit = nl80211_register_unexpected_frame,
8904                 .policy = nl80211_policy,
8905                 .flags = GENL_ADMIN_PERM,
8906                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8907                                   NL80211_FLAG_NEED_RTNL,
8908         },
8909         {
8910                 .cmd = NL80211_CMD_PROBE_CLIENT,
8911                 .doit = nl80211_probe_client,
8912                 .policy = nl80211_policy,
8913                 .flags = GENL_ADMIN_PERM,
8914                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8915                                   NL80211_FLAG_NEED_RTNL,
8916         },
8917         {
8918                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8919                 .doit = nl80211_register_beacons,
8920                 .policy = nl80211_policy,
8921                 .flags = GENL_ADMIN_PERM,
8922                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8923                                   NL80211_FLAG_NEED_RTNL,
8924         },
8925         {
8926                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8927                 .doit = nl80211_set_noack_map,
8928                 .policy = nl80211_policy,
8929                 .flags = GENL_ADMIN_PERM,
8930                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8931                                   NL80211_FLAG_NEED_RTNL,
8932         },
8933         {
8934                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8935                 .doit = nl80211_start_p2p_device,
8936                 .policy = nl80211_policy,
8937                 .flags = GENL_ADMIN_PERM,
8938                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8939                                   NL80211_FLAG_NEED_RTNL,
8940         },
8941         {
8942                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8943                 .doit = nl80211_stop_p2p_device,
8944                 .policy = nl80211_policy,
8945                 .flags = GENL_ADMIN_PERM,
8946                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8947                                   NL80211_FLAG_NEED_RTNL,
8948         },
8949         {
8950                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8951                 .doit = nl80211_set_mcast_rate,
8952                 .policy = nl80211_policy,
8953                 .flags = GENL_ADMIN_PERM,
8954                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8955                                   NL80211_FLAG_NEED_RTNL,
8956         },
8957         {
8958                 .cmd = NL80211_CMD_SET_MAC_ACL,
8959                 .doit = nl80211_set_mac_acl,
8960                 .policy = nl80211_policy,
8961                 .flags = GENL_ADMIN_PERM,
8962                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8963                                   NL80211_FLAG_NEED_RTNL,
8964         },
8965         {
8966                 .cmd = NL80211_CMD_RADAR_DETECT,
8967                 .doit = nl80211_start_radar_detection,
8968                 .policy = nl80211_policy,
8969                 .flags = GENL_ADMIN_PERM,
8970                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8971                                   NL80211_FLAG_NEED_RTNL,
8972         },
8973         {
8974                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
8975                 .doit = nl80211_get_protocol_features,
8976                 .policy = nl80211_policy,
8977         },
8978         {
8979                 .cmd = NL80211_CMD_UPDATE_FT_IES,
8980                 .doit = nl80211_update_ft_ies,
8981                 .policy = nl80211_policy,
8982                 .flags = GENL_ADMIN_PERM,
8983                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8984                                   NL80211_FLAG_NEED_RTNL,
8985         },
8986         {
8987                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
8988                 .doit = nl80211_crit_protocol_start,
8989                 .policy = nl80211_policy,
8990                 .flags = GENL_ADMIN_PERM,
8991                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8992                                   NL80211_FLAG_NEED_RTNL,
8993         },
8994         {
8995                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
8996                 .doit = nl80211_crit_protocol_stop,
8997                 .policy = nl80211_policy,
8998                 .flags = GENL_ADMIN_PERM,
8999                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9000                                   NL80211_FLAG_NEED_RTNL,
9001         }
9002 };
9003
9004 static struct genl_multicast_group nl80211_mlme_mcgrp = {
9005         .name = "mlme",
9006 };
9007
9008 /* multicast groups */
9009 static struct genl_multicast_group nl80211_config_mcgrp = {
9010         .name = "config",
9011 };
9012 static struct genl_multicast_group nl80211_scan_mcgrp = {
9013         .name = "scan",
9014 };
9015 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9016         .name = "regulatory",
9017 };
9018
9019 /* notification functions */
9020
9021 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9022 {
9023         struct sk_buff *msg;
9024
9025         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9026         if (!msg)
9027                 return;
9028
9029         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0,
9030                                false, NULL, NULL, NULL) < 0) {
9031                 nlmsg_free(msg);
9032                 return;
9033         }
9034
9035         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9036                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9037 }
9038
9039 static int nl80211_add_scan_req(struct sk_buff *msg,
9040                                 struct cfg80211_registered_device *rdev)
9041 {
9042         struct cfg80211_scan_request *req = rdev->scan_req;
9043         struct nlattr *nest;
9044         int i;
9045
9046         if (WARN_ON(!req))
9047                 return 0;
9048
9049         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9050         if (!nest)
9051                 goto nla_put_failure;
9052         for (i = 0; i < req->n_ssids; i++) {
9053                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9054                         goto nla_put_failure;
9055         }
9056         nla_nest_end(msg, nest);
9057
9058         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9059         if (!nest)
9060                 goto nla_put_failure;
9061         for (i = 0; i < req->n_channels; i++) {
9062                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9063                         goto nla_put_failure;
9064         }
9065         nla_nest_end(msg, nest);
9066
9067         if (req->ie &&
9068             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9069                 goto nla_put_failure;
9070
9071         if (req->flags)
9072                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9073
9074         return 0;
9075  nla_put_failure:
9076         return -ENOBUFS;
9077 }
9078
9079 static int nl80211_send_scan_msg(struct sk_buff *msg,
9080                                  struct cfg80211_registered_device *rdev,
9081                                  struct wireless_dev *wdev,
9082                                  u32 portid, u32 seq, int flags,
9083                                  u32 cmd)
9084 {
9085         void *hdr;
9086
9087         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9088         if (!hdr)
9089                 return -1;
9090
9091         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9092             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9093                                          wdev->netdev->ifindex)) ||
9094             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9095                 goto nla_put_failure;
9096
9097         /* ignore errors and send incomplete event anyway */
9098         nl80211_add_scan_req(msg, rdev);
9099
9100         return genlmsg_end(msg, hdr);
9101
9102  nla_put_failure:
9103         genlmsg_cancel(msg, hdr);
9104         return -EMSGSIZE;
9105 }
9106
9107 static int
9108 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9109                             struct cfg80211_registered_device *rdev,
9110                             struct net_device *netdev,
9111                             u32 portid, u32 seq, int flags, u32 cmd)
9112 {
9113         void *hdr;
9114
9115         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9116         if (!hdr)
9117                 return -1;
9118
9119         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9120             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9121                 goto nla_put_failure;
9122
9123         return genlmsg_end(msg, hdr);
9124
9125  nla_put_failure:
9126         genlmsg_cancel(msg, hdr);
9127         return -EMSGSIZE;
9128 }
9129
9130 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9131                              struct wireless_dev *wdev)
9132 {
9133         struct sk_buff *msg;
9134
9135         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9136         if (!msg)
9137                 return;
9138
9139         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9140                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9141                 nlmsg_free(msg);
9142                 return;
9143         }
9144
9145         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9146                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9147 }
9148
9149 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9150                             struct wireless_dev *wdev)
9151 {
9152         struct sk_buff *msg;
9153
9154         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9155         if (!msg)
9156                 return;
9157
9158         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9159                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9160                 nlmsg_free(msg);
9161                 return;
9162         }
9163
9164         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9165                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9166 }
9167
9168 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9169                                struct wireless_dev *wdev)
9170 {
9171         struct sk_buff *msg;
9172
9173         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9174         if (!msg)
9175                 return;
9176
9177         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9178                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9179                 nlmsg_free(msg);
9180                 return;
9181         }
9182
9183         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9184                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9185 }
9186
9187 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9188                                      struct net_device *netdev)
9189 {
9190         struct sk_buff *msg;
9191
9192         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9193         if (!msg)
9194                 return;
9195
9196         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9197                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9198                 nlmsg_free(msg);
9199                 return;
9200         }
9201
9202         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9203                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9204 }
9205
9206 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9207                              struct net_device *netdev, u32 cmd)
9208 {
9209         struct sk_buff *msg;
9210
9211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9212         if (!msg)
9213                 return;
9214
9215         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9216                 nlmsg_free(msg);
9217                 return;
9218         }
9219
9220         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9221                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9222 }
9223
9224 /*
9225  * This can happen on global regulatory changes or device specific settings
9226  * based on custom world regulatory domains.
9227  */
9228 void nl80211_send_reg_change_event(struct regulatory_request *request)
9229 {
9230         struct sk_buff *msg;
9231         void *hdr;
9232
9233         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9234         if (!msg)
9235                 return;
9236
9237         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9238         if (!hdr) {
9239                 nlmsg_free(msg);
9240                 return;
9241         }
9242
9243         /* Userspace can always count this one always being set */
9244         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9245                 goto nla_put_failure;
9246
9247         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9248                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9249                                NL80211_REGDOM_TYPE_WORLD))
9250                         goto nla_put_failure;
9251         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9252                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9253                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9254                         goto nla_put_failure;
9255         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9256                    request->intersect) {
9257                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9258                                NL80211_REGDOM_TYPE_INTERSECTION))
9259                         goto nla_put_failure;
9260         } else {
9261                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9262                                NL80211_REGDOM_TYPE_COUNTRY) ||
9263                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9264                                    request->alpha2))
9265                         goto nla_put_failure;
9266         }
9267
9268         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9269             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9270                 goto nla_put_failure;
9271
9272         genlmsg_end(msg, hdr);
9273
9274         rcu_read_lock();
9275         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9276                                 GFP_ATOMIC);
9277         rcu_read_unlock();
9278
9279         return;
9280
9281 nla_put_failure:
9282         genlmsg_cancel(msg, hdr);
9283         nlmsg_free(msg);
9284 }
9285
9286 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9287                                     struct net_device *netdev,
9288                                     const u8 *buf, size_t len,
9289                                     enum nl80211_commands cmd, gfp_t gfp)
9290 {
9291         struct sk_buff *msg;
9292         void *hdr;
9293
9294         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9295         if (!msg)
9296                 return;
9297
9298         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9299         if (!hdr) {
9300                 nlmsg_free(msg);
9301                 return;
9302         }
9303
9304         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9305             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9306             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9307                 goto nla_put_failure;
9308
9309         genlmsg_end(msg, hdr);
9310
9311         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9312                                 nl80211_mlme_mcgrp.id, gfp);
9313         return;
9314
9315  nla_put_failure:
9316         genlmsg_cancel(msg, hdr);
9317         nlmsg_free(msg);
9318 }
9319
9320 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9321                           struct net_device *netdev, const u8 *buf,
9322                           size_t len, gfp_t gfp)
9323 {
9324         nl80211_send_mlme_event(rdev, netdev, buf, len,
9325                                 NL80211_CMD_AUTHENTICATE, gfp);
9326 }
9327
9328 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9329                            struct net_device *netdev, const u8 *buf,
9330                            size_t len, gfp_t gfp)
9331 {
9332         nl80211_send_mlme_event(rdev, netdev, buf, len,
9333                                 NL80211_CMD_ASSOCIATE, gfp);
9334 }
9335
9336 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9337                          struct net_device *netdev, const u8 *buf,
9338                          size_t len, gfp_t gfp)
9339 {
9340         nl80211_send_mlme_event(rdev, netdev, buf, len,
9341                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9342 }
9343
9344 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9345                            struct net_device *netdev, const u8 *buf,
9346                            size_t len, gfp_t gfp)
9347 {
9348         nl80211_send_mlme_event(rdev, netdev, buf, len,
9349                                 NL80211_CMD_DISASSOCIATE, gfp);
9350 }
9351
9352 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
9353                                   size_t len)
9354 {
9355         struct wireless_dev *wdev = dev->ieee80211_ptr;
9356         struct wiphy *wiphy = wdev->wiphy;
9357         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9358         const struct ieee80211_mgmt *mgmt = (void *)buf;
9359         u32 cmd;
9360
9361         if (WARN_ON(len < 2))
9362                 return;
9363
9364         if (ieee80211_is_deauth(mgmt->frame_control))
9365                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
9366         else
9367                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
9368
9369         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
9370         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
9371 }
9372 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
9373
9374 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9375                                       struct net_device *netdev, int cmd,
9376                                       const u8 *addr, gfp_t gfp)
9377 {
9378         struct sk_buff *msg;
9379         void *hdr;
9380
9381         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9382         if (!msg)
9383                 return;
9384
9385         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9386         if (!hdr) {
9387                 nlmsg_free(msg);
9388                 return;
9389         }
9390
9391         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9392             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9393             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9394             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9395                 goto nla_put_failure;
9396
9397         genlmsg_end(msg, hdr);
9398
9399         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9400                                 nl80211_mlme_mcgrp.id, gfp);
9401         return;
9402
9403  nla_put_failure:
9404         genlmsg_cancel(msg, hdr);
9405         nlmsg_free(msg);
9406 }
9407
9408 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9409                                struct net_device *netdev, const u8 *addr,
9410                                gfp_t gfp)
9411 {
9412         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9413                                   addr, gfp);
9414 }
9415
9416 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9417                                 struct net_device *netdev, const u8 *addr,
9418                                 gfp_t gfp)
9419 {
9420         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9421                                   addr, gfp);
9422 }
9423
9424 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9425                                  struct net_device *netdev, const u8 *bssid,
9426                                  const u8 *req_ie, size_t req_ie_len,
9427                                  const u8 *resp_ie, size_t resp_ie_len,
9428                                  u16 status, gfp_t gfp)
9429 {
9430         struct sk_buff *msg;
9431         void *hdr;
9432
9433         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9434         if (!msg)
9435                 return;
9436
9437         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9438         if (!hdr) {
9439                 nlmsg_free(msg);
9440                 return;
9441         }
9442
9443         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9444             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9445             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9446             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9447             (req_ie &&
9448              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9449             (resp_ie &&
9450              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_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 }
9464
9465 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9466                          struct net_device *netdev, const u8 *bssid,
9467                          const u8 *req_ie, size_t req_ie_len,
9468                          const u8 *resp_ie, size_t resp_ie_len, 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_ROAM);
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             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9486             (req_ie &&
9487              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9488             (resp_ie &&
9489              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
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
9504 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9505                                struct net_device *netdev, u16 reason,
9506                                const u8 *ie, size_t ie_len, bool from_ap)
9507 {
9508         struct sk_buff *msg;
9509         void *hdr;
9510
9511         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9512         if (!msg)
9513                 return;
9514
9515         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9516         if (!hdr) {
9517                 nlmsg_free(msg);
9518                 return;
9519         }
9520
9521         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9522             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9523             (from_ap && reason &&
9524              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9525             (from_ap &&
9526              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9527             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9528                 goto nla_put_failure;
9529
9530         genlmsg_end(msg, hdr);
9531
9532         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9533                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9534         return;
9535
9536  nla_put_failure:
9537         genlmsg_cancel(msg, hdr);
9538         nlmsg_free(msg);
9539
9540 }
9541
9542 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9543                              struct net_device *netdev, const u8 *bssid,
9544                              gfp_t gfp)
9545 {
9546         struct sk_buff *msg;
9547         void *hdr;
9548
9549         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9550         if (!msg)
9551                 return;
9552
9553         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9554         if (!hdr) {
9555                 nlmsg_free(msg);
9556                 return;
9557         }
9558
9559         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9560             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9561             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9562                 goto nla_put_failure;
9563
9564         genlmsg_end(msg, hdr);
9565
9566         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9567                                 nl80211_mlme_mcgrp.id, gfp);
9568         return;
9569
9570  nla_put_failure:
9571         genlmsg_cancel(msg, hdr);
9572         nlmsg_free(msg);
9573 }
9574
9575 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9576                                         const u8* ie, u8 ie_len, gfp_t gfp)
9577 {
9578         struct wireless_dev *wdev = dev->ieee80211_ptr;
9579         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9580         struct sk_buff *msg;
9581         void *hdr;
9582
9583         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9584                 return;
9585
9586         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9587
9588         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9589         if (!msg)
9590                 return;
9591
9592         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9593         if (!hdr) {
9594                 nlmsg_free(msg);
9595                 return;
9596         }
9597
9598         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9599             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9600             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9601             (ie_len && ie &&
9602              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9603                 goto nla_put_failure;
9604
9605         genlmsg_end(msg, hdr);
9606
9607         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9608                                 nl80211_mlme_mcgrp.id, gfp);
9609         return;
9610
9611  nla_put_failure:
9612         genlmsg_cancel(msg, hdr);
9613         nlmsg_free(msg);
9614 }
9615 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9616
9617 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9618                                  struct net_device *netdev, const u8 *addr,
9619                                  enum nl80211_key_type key_type, int key_id,
9620                                  const u8 *tsc, gfp_t gfp)
9621 {
9622         struct sk_buff *msg;
9623         void *hdr;
9624
9625         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9626         if (!msg)
9627                 return;
9628
9629         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9630         if (!hdr) {
9631                 nlmsg_free(msg);
9632                 return;
9633         }
9634
9635         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9636             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9637             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9638             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9639             (key_id != -1 &&
9640              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9641             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9642                 goto nla_put_failure;
9643
9644         genlmsg_end(msg, hdr);
9645
9646         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9647                                 nl80211_mlme_mcgrp.id, gfp);
9648         return;
9649
9650  nla_put_failure:
9651         genlmsg_cancel(msg, hdr);
9652         nlmsg_free(msg);
9653 }
9654
9655 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9656                                     struct ieee80211_channel *channel_before,
9657                                     struct ieee80211_channel *channel_after)
9658 {
9659         struct sk_buff *msg;
9660         void *hdr;
9661         struct nlattr *nl_freq;
9662
9663         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9664         if (!msg)
9665                 return;
9666
9667         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9668         if (!hdr) {
9669                 nlmsg_free(msg);
9670                 return;
9671         }
9672
9673         /*
9674          * Since we are applying the beacon hint to a wiphy we know its
9675          * wiphy_idx is valid
9676          */
9677         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9678                 goto nla_put_failure;
9679
9680         /* Before */
9681         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9682         if (!nl_freq)
9683                 goto nla_put_failure;
9684         if (nl80211_msg_put_channel(msg, channel_before, false))
9685                 goto nla_put_failure;
9686         nla_nest_end(msg, nl_freq);
9687
9688         /* After */
9689         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9690         if (!nl_freq)
9691                 goto nla_put_failure;
9692         if (nl80211_msg_put_channel(msg, channel_after, false))
9693                 goto nla_put_failure;
9694         nla_nest_end(msg, nl_freq);
9695
9696         genlmsg_end(msg, hdr);
9697
9698         rcu_read_lock();
9699         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9700                                 GFP_ATOMIC);
9701         rcu_read_unlock();
9702
9703         return;
9704
9705 nla_put_failure:
9706         genlmsg_cancel(msg, hdr);
9707         nlmsg_free(msg);
9708 }
9709
9710 static void nl80211_send_remain_on_chan_event(
9711         int cmd, struct cfg80211_registered_device *rdev,
9712         struct wireless_dev *wdev, u64 cookie,
9713         struct ieee80211_channel *chan,
9714         unsigned int duration, gfp_t gfp)
9715 {
9716         struct sk_buff *msg;
9717         void *hdr;
9718
9719         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9720         if (!msg)
9721                 return;
9722
9723         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9724         if (!hdr) {
9725                 nlmsg_free(msg);
9726                 return;
9727         }
9728
9729         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9730             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9731                                          wdev->netdev->ifindex)) ||
9732             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9733             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9734             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9735                         NL80211_CHAN_NO_HT) ||
9736             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9737                 goto nla_put_failure;
9738
9739         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9740             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9741                 goto nla_put_failure;
9742
9743         genlmsg_end(msg, hdr);
9744
9745         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9746                                 nl80211_mlme_mcgrp.id, gfp);
9747         return;
9748
9749  nla_put_failure:
9750         genlmsg_cancel(msg, hdr);
9751         nlmsg_free(msg);
9752 }
9753
9754 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9755                                struct ieee80211_channel *chan,
9756                                unsigned int duration, gfp_t gfp)
9757 {
9758         struct wiphy *wiphy = wdev->wiphy;
9759         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9760
9761         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9762         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9763                                           rdev, wdev, cookie, chan,
9764                                           duration, gfp);
9765 }
9766 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9767
9768 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9769                                         struct ieee80211_channel *chan,
9770                                         gfp_t gfp)
9771 {
9772         struct wiphy *wiphy = wdev->wiphy;
9773         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9774
9775         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9776         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9777                                           rdev, wdev, cookie, chan, 0, gfp);
9778 }
9779 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9780
9781 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9782                       struct station_info *sinfo, gfp_t gfp)
9783 {
9784         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9785         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9786         struct sk_buff *msg;
9787
9788         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9789
9790         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9791         if (!msg)
9792                 return;
9793
9794         if (nl80211_send_station(msg, 0, 0, 0,
9795                                  rdev, dev, mac_addr, sinfo) < 0) {
9796                 nlmsg_free(msg);
9797                 return;
9798         }
9799
9800         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9801                                 nl80211_mlme_mcgrp.id, gfp);
9802 }
9803 EXPORT_SYMBOL(cfg80211_new_sta);
9804
9805 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9806 {
9807         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9808         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9809         struct sk_buff *msg;
9810         void *hdr;
9811
9812         trace_cfg80211_del_sta(dev, mac_addr);
9813
9814         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9815         if (!msg)
9816                 return;
9817
9818         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9819         if (!hdr) {
9820                 nlmsg_free(msg);
9821                 return;
9822         }
9823
9824         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9825             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9826                 goto nla_put_failure;
9827
9828         genlmsg_end(msg, hdr);
9829
9830         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9831                                 nl80211_mlme_mcgrp.id, gfp);
9832         return;
9833
9834  nla_put_failure:
9835         genlmsg_cancel(msg, hdr);
9836         nlmsg_free(msg);
9837 }
9838 EXPORT_SYMBOL(cfg80211_del_sta);
9839
9840 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9841                           enum nl80211_connect_failed_reason reason,
9842                           gfp_t gfp)
9843 {
9844         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9845         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9846         struct sk_buff *msg;
9847         void *hdr;
9848
9849         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9850         if (!msg)
9851                 return;
9852
9853         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9854         if (!hdr) {
9855                 nlmsg_free(msg);
9856                 return;
9857         }
9858
9859         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9860             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9861             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9862                 goto nla_put_failure;
9863
9864         genlmsg_end(msg, hdr);
9865
9866         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9867                                 nl80211_mlme_mcgrp.id, gfp);
9868         return;
9869
9870  nla_put_failure:
9871         genlmsg_cancel(msg, hdr);
9872         nlmsg_free(msg);
9873 }
9874 EXPORT_SYMBOL(cfg80211_conn_failed);
9875
9876 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9877                                        const u8 *addr, gfp_t gfp)
9878 {
9879         struct wireless_dev *wdev = dev->ieee80211_ptr;
9880         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9881         struct sk_buff *msg;
9882         void *hdr;
9883         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9884
9885         if (!nlportid)
9886                 return false;
9887
9888         msg = nlmsg_new(100, gfp);
9889         if (!msg)
9890                 return true;
9891
9892         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9893         if (!hdr) {
9894                 nlmsg_free(msg);
9895                 return true;
9896         }
9897
9898         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9899             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9900             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9901                 goto nla_put_failure;
9902
9903         genlmsg_end(msg, hdr);
9904         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9905         return true;
9906
9907  nla_put_failure:
9908         genlmsg_cancel(msg, hdr);
9909         nlmsg_free(msg);
9910         return true;
9911 }
9912
9913 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9914                                 const u8 *addr, gfp_t gfp)
9915 {
9916         struct wireless_dev *wdev = dev->ieee80211_ptr;
9917         bool ret;
9918
9919         trace_cfg80211_rx_spurious_frame(dev, addr);
9920
9921         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9922                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9923                 trace_cfg80211_return_bool(false);
9924                 return false;
9925         }
9926         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9927                                          addr, gfp);
9928         trace_cfg80211_return_bool(ret);
9929         return ret;
9930 }
9931 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9932
9933 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9934                                         const u8 *addr, gfp_t gfp)
9935 {
9936         struct wireless_dev *wdev = dev->ieee80211_ptr;
9937         bool ret;
9938
9939         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9940
9941         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9942                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9943                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9944                 trace_cfg80211_return_bool(false);
9945                 return false;
9946         }
9947         ret = __nl80211_unexpected_frame(dev,
9948                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9949                                          addr, gfp);
9950         trace_cfg80211_return_bool(ret);
9951         return ret;
9952 }
9953 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9954
9955 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9956                       struct wireless_dev *wdev, u32 nlportid,
9957                       int freq, int sig_dbm,
9958                       const u8 *buf, size_t len, gfp_t gfp)
9959 {
9960         struct net_device *netdev = wdev->netdev;
9961         struct sk_buff *msg;
9962         void *hdr;
9963
9964         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9965         if (!msg)
9966                 return -ENOMEM;
9967
9968         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9969         if (!hdr) {
9970                 nlmsg_free(msg);
9971                 return -ENOMEM;
9972         }
9973
9974         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9975             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9976                                         netdev->ifindex)) ||
9977             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9978             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9979             (sig_dbm &&
9980              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9981             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9982                 goto nla_put_failure;
9983
9984         genlmsg_end(msg, hdr);
9985
9986         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9987
9988  nla_put_failure:
9989         genlmsg_cancel(msg, hdr);
9990         nlmsg_free(msg);
9991         return -ENOBUFS;
9992 }
9993
9994 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
9995                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
9996 {
9997         struct wiphy *wiphy = wdev->wiphy;
9998         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9999         struct net_device *netdev = wdev->netdev;
10000         struct sk_buff *msg;
10001         void *hdr;
10002
10003         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10004
10005         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10006         if (!msg)
10007                 return;
10008
10009         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10010         if (!hdr) {
10011                 nlmsg_free(msg);
10012                 return;
10013         }
10014
10015         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10016             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10017                                    netdev->ifindex)) ||
10018             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10019             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10020             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10021             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10022                 goto nla_put_failure;
10023
10024         genlmsg_end(msg, hdr);
10025
10026         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
10027         return;
10028
10029  nla_put_failure:
10030         genlmsg_cancel(msg, hdr);
10031         nlmsg_free(msg);
10032 }
10033 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10034
10035 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10036                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10037                               gfp_t gfp)
10038 {
10039         struct wireless_dev *wdev = dev->ieee80211_ptr;
10040         struct wiphy *wiphy = wdev->wiphy;
10041         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10042         struct sk_buff *msg;
10043         struct nlattr *pinfoattr;
10044         void *hdr;
10045
10046         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10047
10048         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10049         if (!msg)
10050                 return;
10051
10052         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10053         if (!hdr) {
10054                 nlmsg_free(msg);
10055                 return;
10056         }
10057
10058         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10059             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10060                 goto nla_put_failure;
10061
10062         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10063         if (!pinfoattr)
10064                 goto nla_put_failure;
10065
10066         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10067                         rssi_event))
10068                 goto nla_put_failure;
10069
10070         nla_nest_end(msg, pinfoattr);
10071
10072         genlmsg_end(msg, hdr);
10073
10074         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10075                                 nl80211_mlme_mcgrp.id, gfp);
10076         return;
10077
10078  nla_put_failure:
10079         genlmsg_cancel(msg, hdr);
10080         nlmsg_free(msg);
10081 }
10082 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10083
10084 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10085                                      struct net_device *netdev, const u8 *bssid,
10086                                      const u8 *replay_ctr, gfp_t gfp)
10087 {
10088         struct sk_buff *msg;
10089         struct nlattr *rekey_attr;
10090         void *hdr;
10091
10092         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10093         if (!msg)
10094                 return;
10095
10096         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10097         if (!hdr) {
10098                 nlmsg_free(msg);
10099                 return;
10100         }
10101
10102         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10103             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10104             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10105                 goto nla_put_failure;
10106
10107         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10108         if (!rekey_attr)
10109                 goto nla_put_failure;
10110
10111         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10112                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10113                 goto nla_put_failure;
10114
10115         nla_nest_end(msg, rekey_attr);
10116
10117         genlmsg_end(msg, hdr);
10118
10119         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10120                                 nl80211_mlme_mcgrp.id, gfp);
10121         return;
10122
10123  nla_put_failure:
10124         genlmsg_cancel(msg, hdr);
10125         nlmsg_free(msg);
10126 }
10127
10128 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10129                                const u8 *replay_ctr, gfp_t gfp)
10130 {
10131         struct wireless_dev *wdev = dev->ieee80211_ptr;
10132         struct wiphy *wiphy = wdev->wiphy;
10133         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10134
10135         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10136         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10137 }
10138 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10139
10140 static void
10141 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10142                                struct net_device *netdev, int index,
10143                                const u8 *bssid, bool preauth, gfp_t gfp)
10144 {
10145         struct sk_buff *msg;
10146         struct nlattr *attr;
10147         void *hdr;
10148
10149         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10150         if (!msg)
10151                 return;
10152
10153         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10154         if (!hdr) {
10155                 nlmsg_free(msg);
10156                 return;
10157         }
10158
10159         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10160             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10161                 goto nla_put_failure;
10162
10163         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10164         if (!attr)
10165                 goto nla_put_failure;
10166
10167         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10168             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10169             (preauth &&
10170              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10171                 goto nla_put_failure;
10172
10173         nla_nest_end(msg, attr);
10174
10175         genlmsg_end(msg, hdr);
10176
10177         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10178                                 nl80211_mlme_mcgrp.id, gfp);
10179         return;
10180
10181  nla_put_failure:
10182         genlmsg_cancel(msg, hdr);
10183         nlmsg_free(msg);
10184 }
10185
10186 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10187                                      const u8 *bssid, bool preauth, gfp_t gfp)
10188 {
10189         struct wireless_dev *wdev = dev->ieee80211_ptr;
10190         struct wiphy *wiphy = wdev->wiphy;
10191         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10192
10193         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10194         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10195 }
10196 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10197
10198 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10199                                      struct net_device *netdev,
10200                                      struct cfg80211_chan_def *chandef,
10201                                      gfp_t gfp)
10202 {
10203         struct sk_buff *msg;
10204         void *hdr;
10205
10206         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10207         if (!msg)
10208                 return;
10209
10210         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10211         if (!hdr) {
10212                 nlmsg_free(msg);
10213                 return;
10214         }
10215
10216         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10217                 goto nla_put_failure;
10218
10219         if (nl80211_send_chandef(msg, chandef))
10220                 goto nla_put_failure;
10221
10222         genlmsg_end(msg, hdr);
10223
10224         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10225                                 nl80211_mlme_mcgrp.id, gfp);
10226         return;
10227
10228  nla_put_failure:
10229         genlmsg_cancel(msg, hdr);
10230         nlmsg_free(msg);
10231 }
10232
10233 void cfg80211_ch_switch_notify(struct net_device *dev,
10234                                struct cfg80211_chan_def *chandef)
10235 {
10236         struct wireless_dev *wdev = dev->ieee80211_ptr;
10237         struct wiphy *wiphy = wdev->wiphy;
10238         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10239
10240         trace_cfg80211_ch_switch_notify(dev, chandef);
10241
10242         wdev_lock(wdev);
10243
10244         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10245                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10246                 goto out;
10247
10248         wdev->channel = chandef->chan;
10249         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10250 out:
10251         wdev_unlock(wdev);
10252         return;
10253 }
10254 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10255
10256 void cfg80211_cqm_txe_notify(struct net_device *dev,
10257                              const u8 *peer, u32 num_packets,
10258                              u32 rate, u32 intvl, gfp_t gfp)
10259 {
10260         struct wireless_dev *wdev = dev->ieee80211_ptr;
10261         struct wiphy *wiphy = wdev->wiphy;
10262         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10263         struct sk_buff *msg;
10264         struct nlattr *pinfoattr;
10265         void *hdr;
10266
10267         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10268         if (!msg)
10269                 return;
10270
10271         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10272         if (!hdr) {
10273                 nlmsg_free(msg);
10274                 return;
10275         }
10276
10277         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10278             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10279             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10280                 goto nla_put_failure;
10281
10282         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10283         if (!pinfoattr)
10284                 goto nla_put_failure;
10285
10286         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10287                 goto nla_put_failure;
10288
10289         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10290                 goto nla_put_failure;
10291
10292         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10293                 goto nla_put_failure;
10294
10295         nla_nest_end(msg, pinfoattr);
10296
10297         genlmsg_end(msg, hdr);
10298
10299         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10300                                 nl80211_mlme_mcgrp.id, gfp);
10301         return;
10302
10303  nla_put_failure:
10304         genlmsg_cancel(msg, hdr);
10305         nlmsg_free(msg);
10306 }
10307 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10308
10309 void
10310 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10311                      struct cfg80211_chan_def *chandef,
10312                      enum nl80211_radar_event event,
10313                      struct net_device *netdev, gfp_t gfp)
10314 {
10315         struct sk_buff *msg;
10316         void *hdr;
10317
10318         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10319         if (!msg)
10320                 return;
10321
10322         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10323         if (!hdr) {
10324                 nlmsg_free(msg);
10325                 return;
10326         }
10327
10328         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10329                 goto nla_put_failure;
10330
10331         /* NOP and radar events don't need a netdev parameter */
10332         if (netdev) {
10333                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10334
10335                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10336                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10337                         goto nla_put_failure;
10338         }
10339
10340         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10341                 goto nla_put_failure;
10342
10343         if (nl80211_send_chandef(msg, chandef))
10344                 goto nla_put_failure;
10345
10346         genlmsg_end(msg, hdr);
10347
10348         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10349                                 nl80211_mlme_mcgrp.id, gfp);
10350         return;
10351
10352  nla_put_failure:
10353         genlmsg_cancel(msg, hdr);
10354         nlmsg_free(msg);
10355 }
10356
10357 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10358                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10359 {
10360         struct wireless_dev *wdev = dev->ieee80211_ptr;
10361         struct wiphy *wiphy = wdev->wiphy;
10362         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10363         struct sk_buff *msg;
10364         struct nlattr *pinfoattr;
10365         void *hdr;
10366
10367         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10368
10369         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10370         if (!msg)
10371                 return;
10372
10373         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10374         if (!hdr) {
10375                 nlmsg_free(msg);
10376                 return;
10377         }
10378
10379         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10380             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10381             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10382                 goto nla_put_failure;
10383
10384         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10385         if (!pinfoattr)
10386                 goto nla_put_failure;
10387
10388         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10389                 goto nla_put_failure;
10390
10391         nla_nest_end(msg, pinfoattr);
10392
10393         genlmsg_end(msg, hdr);
10394
10395         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10396                                 nl80211_mlme_mcgrp.id, gfp);
10397         return;
10398
10399  nla_put_failure:
10400         genlmsg_cancel(msg, hdr);
10401         nlmsg_free(msg);
10402 }
10403 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10404
10405 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10406                            u64 cookie, bool acked, gfp_t gfp)
10407 {
10408         struct wireless_dev *wdev = dev->ieee80211_ptr;
10409         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10410         struct sk_buff *msg;
10411         void *hdr;
10412
10413         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10414
10415         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10416
10417         if (!msg)
10418                 return;
10419
10420         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10421         if (!hdr) {
10422                 nlmsg_free(msg);
10423                 return;
10424         }
10425
10426         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10427             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10428             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10429             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10430             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10431                 goto nla_put_failure;
10432
10433         genlmsg_end(msg, hdr);
10434
10435         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10436                                 nl80211_mlme_mcgrp.id, gfp);
10437         return;
10438
10439  nla_put_failure:
10440         genlmsg_cancel(msg, hdr);
10441         nlmsg_free(msg);
10442 }
10443 EXPORT_SYMBOL(cfg80211_probe_status);
10444
10445 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10446                                  const u8 *frame, size_t len,
10447                                  int freq, int sig_dbm)
10448 {
10449         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10450         struct sk_buff *msg;
10451         void *hdr;
10452         struct cfg80211_beacon_registration *reg;
10453
10454         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10455
10456         spin_lock_bh(&rdev->beacon_registrations_lock);
10457         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10458                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10459                 if (!msg) {
10460                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10461                         return;
10462                 }
10463
10464                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10465                 if (!hdr)
10466                         goto nla_put_failure;
10467
10468                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10469                     (freq &&
10470                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10471                     (sig_dbm &&
10472                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10473                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10474                         goto nla_put_failure;
10475
10476                 genlmsg_end(msg, hdr);
10477
10478                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10479         }
10480         spin_unlock_bh(&rdev->beacon_registrations_lock);
10481         return;
10482
10483  nla_put_failure:
10484         spin_unlock_bh(&rdev->beacon_registrations_lock);
10485         if (hdr)
10486                 genlmsg_cancel(msg, hdr);
10487         nlmsg_free(msg);
10488 }
10489 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10490
10491 #ifdef CONFIG_PM
10492 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10493                                    struct cfg80211_wowlan_wakeup *wakeup,
10494                                    gfp_t gfp)
10495 {
10496         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10497         struct sk_buff *msg;
10498         void *hdr;
10499         int size = 200;
10500
10501         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10502
10503         if (wakeup)
10504                 size += wakeup->packet_present_len;
10505
10506         msg = nlmsg_new(size, gfp);
10507         if (!msg)
10508                 return;
10509
10510         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10511         if (!hdr)
10512                 goto free_msg;
10513
10514         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10515             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10516                 goto free_msg;
10517
10518         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10519                                         wdev->netdev->ifindex))
10520                 goto free_msg;
10521
10522         if (wakeup) {
10523                 struct nlattr *reasons;
10524
10525                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10526
10527                 if (wakeup->disconnect &&
10528                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10529                         goto free_msg;
10530                 if (wakeup->magic_pkt &&
10531                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10532                         goto free_msg;
10533                 if (wakeup->gtk_rekey_failure &&
10534                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10535                         goto free_msg;
10536                 if (wakeup->eap_identity_req &&
10537                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10538                         goto free_msg;
10539                 if (wakeup->four_way_handshake &&
10540                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10541                         goto free_msg;
10542                 if (wakeup->rfkill_release &&
10543                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10544                         goto free_msg;
10545
10546                 if (wakeup->pattern_idx >= 0 &&
10547                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10548                                 wakeup->pattern_idx))
10549                         goto free_msg;
10550
10551                 if (wakeup->tcp_match)
10552                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10553
10554                 if (wakeup->tcp_connlost)
10555                         nla_put_flag(msg,
10556                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10557
10558                 if (wakeup->tcp_nomoretokens)
10559                         nla_put_flag(msg,
10560                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10561
10562                 if (wakeup->packet) {
10563                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10564                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10565
10566                         if (!wakeup->packet_80211) {
10567                                 pkt_attr =
10568                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10569                                 len_attr =
10570                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10571                         }
10572
10573                         if (wakeup->packet_len &&
10574                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10575                                 goto free_msg;
10576
10577                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10578                                     wakeup->packet))
10579                                 goto free_msg;
10580                 }
10581
10582                 nla_nest_end(msg, reasons);
10583         }
10584
10585         genlmsg_end(msg, hdr);
10586
10587         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10588                                 nl80211_mlme_mcgrp.id, gfp);
10589         return;
10590
10591  free_msg:
10592         nlmsg_free(msg);
10593 }
10594 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10595 #endif
10596
10597 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10598                                 enum nl80211_tdls_operation oper,
10599                                 u16 reason_code, gfp_t gfp)
10600 {
10601         struct wireless_dev *wdev = dev->ieee80211_ptr;
10602         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10603         struct sk_buff *msg;
10604         void *hdr;
10605
10606         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10607                                          reason_code);
10608
10609         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10610         if (!msg)
10611                 return;
10612
10613         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10614         if (!hdr) {
10615                 nlmsg_free(msg);
10616                 return;
10617         }
10618
10619         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10620             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10621             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10622             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10623             (reason_code > 0 &&
10624              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10625                 goto nla_put_failure;
10626
10627         genlmsg_end(msg, hdr);
10628
10629         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10630                                 nl80211_mlme_mcgrp.id, gfp);
10631         return;
10632
10633  nla_put_failure:
10634         genlmsg_cancel(msg, hdr);
10635         nlmsg_free(msg);
10636 }
10637 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10638
10639 static int nl80211_netlink_notify(struct notifier_block * nb,
10640                                   unsigned long state,
10641                                   void *_notify)
10642 {
10643         struct netlink_notify *notify = _notify;
10644         struct cfg80211_registered_device *rdev;
10645         struct wireless_dev *wdev;
10646         struct cfg80211_beacon_registration *reg, *tmp;
10647
10648         if (state != NETLINK_URELEASE)
10649                 return NOTIFY_DONE;
10650
10651         rcu_read_lock();
10652
10653         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10654                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10655                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10656
10657                 spin_lock_bh(&rdev->beacon_registrations_lock);
10658                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10659                                          list) {
10660                         if (reg->nlportid == notify->portid) {
10661                                 list_del(&reg->list);
10662                                 kfree(reg);
10663                                 break;
10664                         }
10665                 }
10666                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10667         }
10668
10669         rcu_read_unlock();
10670
10671         return NOTIFY_DONE;
10672 }
10673
10674 static struct notifier_block nl80211_netlink_notifier = {
10675         .notifier_call = nl80211_netlink_notify,
10676 };
10677
10678 void cfg80211_ft_event(struct net_device *netdev,
10679                        struct cfg80211_ft_event_params *ft_event)
10680 {
10681         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
10682         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10683         struct sk_buff *msg;
10684         void *hdr;
10685
10686         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
10687
10688         if (!ft_event->target_ap)
10689                 return;
10690
10691         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10692         if (!msg)
10693                 return;
10694
10695         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
10696         if (!hdr) {
10697                 nlmsg_free(msg);
10698                 return;
10699         }
10700
10701         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
10702         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
10703         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
10704         if (ft_event->ies)
10705                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
10706         if (ft_event->ric_ies)
10707                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
10708                         ft_event->ric_ies);
10709
10710         genlmsg_end(msg, hdr);
10711
10712         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10713                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10714 }
10715 EXPORT_SYMBOL(cfg80211_ft_event);
10716
10717 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
10718 {
10719         struct cfg80211_registered_device *rdev;
10720         struct sk_buff *msg;
10721         void *hdr;
10722         u32 nlportid;
10723
10724         rdev = wiphy_to_dev(wdev->wiphy);
10725         if (!rdev->crit_proto_nlportid)
10726                 return;
10727
10728         nlportid = rdev->crit_proto_nlportid;
10729         rdev->crit_proto_nlportid = 0;
10730
10731         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10732         if (!msg)
10733                 return;
10734
10735         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
10736         if (!hdr)
10737                 goto nla_put_failure;
10738
10739         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10740             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10741                 goto nla_put_failure;
10742
10743         genlmsg_end(msg, hdr);
10744
10745         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10746         return;
10747
10748  nla_put_failure:
10749         if (hdr)
10750                 genlmsg_cancel(msg, hdr);
10751         nlmsg_free(msg);
10752
10753 }
10754 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
10755
10756 /* initialisation/exit functions */
10757
10758 int nl80211_init(void)
10759 {
10760         int err;
10761
10762         err = genl_register_family_with_ops(&nl80211_fam,
10763                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10764         if (err)
10765                 return err;
10766
10767         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10768         if (err)
10769                 goto err_out;
10770
10771         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10772         if (err)
10773                 goto err_out;
10774
10775         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10776         if (err)
10777                 goto err_out;
10778
10779         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10780         if (err)
10781                 goto err_out;
10782
10783 #ifdef CONFIG_NL80211_TESTMODE
10784         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10785         if (err)
10786                 goto err_out;
10787 #endif
10788
10789         err = netlink_register_notifier(&nl80211_netlink_notifier);
10790         if (err)
10791                 goto err_out;
10792
10793         return 0;
10794  err_out:
10795         genl_unregister_family(&nl80211_fam);
10796         return err;
10797 }
10798
10799 void nl80211_exit(void)
10800 {
10801         netlink_unregister_notifier(&nl80211_netlink_notifier);
10802         genl_unregister_family(&nl80211_fam);
10803 }