Pileus Git - ~andy/linux/blob - net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <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(const struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(const 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 /* multicast groups */
  51 enum nl80211_multicast_groups {
  52         NL80211_MCGRP_CONFIG,
  53         NL80211_MCGRP_SCAN,
  54         NL80211_MCGRP_REGULATORY,
  55         NL80211_MCGRP_MLME,
  56         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  57 };
  58
  59 static const struct genl_multicast_group nl80211_mcgrps[] = {
  60         [NL80211_MCGRP_CONFIG] = { .name = "config", },
  61         [NL80211_MCGRP_SCAN] = { .name = "scan", },
  62         [NL80211_MCGRP_REGULATORY] = { .name = "regulatory", },
  63         [NL80211_MCGRP_MLME] = { .name = "mlme", },
  64 #ifdef CONFIG_NL80211_TESTMODE
  65         [NL80211_MCGRP_TESTMODE] = { .name = "testmode", }
  66 #endif
  67 };
  68
  69 /* returns ERR_PTR values */
  70 static struct wireless_dev *
  71 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  72 {
  73         struct cfg80211_registered_device *rdev;
  74         struct wireless_dev *result = NULL;
  75         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  76         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  77         u64 wdev_id;
  78         int wiphy_idx = -1;
  79         int ifidx = -1;
  80
  81         ASSERT_RTNL();
  82
  83         if (!have_ifidx && !have_wdev_id)
  84                 return ERR_PTR(-EINVAL);
  85
  86         if (have_ifidx)
  87                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  88         if (have_wdev_id) {
  89                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  90                 wiphy_idx = wdev_id >> 32;
  91         }
  92
  93         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  94                 struct wireless_dev *wdev;
  95
  96                 if (wiphy_net(&rdev->wiphy) != netns)
  97                         continue;
  98
  99                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 100                         continue;
 101
 102                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 103                         if (have_ifidx && wdev->netdev &&
 104                             wdev->netdev->ifindex == ifidx) {
 105                                 result = wdev;
 106                                 break;
 107                         }
 108                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                 }
 113
 114                 if (result)
 115                         break;
 116         }
 117
 118         if (result)
 119                 return result;
 120         return ERR_PTR(-ENODEV);
 121 }
 122
 123 static struct cfg80211_registered_device *
 124 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 125 {
 126         struct cfg80211_registered_device *rdev = NULL, *tmp;
 127         struct net_device *netdev;
 128
 129         ASSERT_RTNL();
 130
 131         if (!attrs[NL80211_ATTR_WIPHY] &&
 132             !attrs[NL80211_ATTR_IFINDEX] &&
 133             !attrs[NL80211_ATTR_WDEV])
 134                 return ERR_PTR(-EINVAL);
 135
 136         if (attrs[NL80211_ATTR_WIPHY])
 137                 rdev = cfg80211_rdev_by_wiphy_idx(
 138                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 139
 140         if (attrs[NL80211_ATTR_WDEV]) {
 141                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 142                 struct wireless_dev *wdev;
 143                 bool found = false;
 144
 145                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 146                 if (tmp) {
 147                         /* make sure wdev exists */
 148                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 149                                 if (wdev->identifier != (u32)wdev_id)
 150                                         continue;
 151                                 found = true;
 152                                 break;
 153                         }
 154
 155                         if (!found)
 156                                 tmp = NULL;
 157
 158                         if (rdev && tmp != rdev)
 159                                 return ERR_PTR(-EINVAL);
 160                         rdev = tmp;
 161                 }
 162         }
 163
 164         if (attrs[NL80211_ATTR_IFINDEX]) {
 165                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 166                 netdev = dev_get_by_index(netns, ifindex);
 167                 if (netdev) {
 168                         if (netdev->ieee80211_ptr)
 169                                 tmp = wiphy_to_dev(
 170                                                 netdev->ieee80211_ptr->wiphy);
 171                         else
 172                                 tmp = NULL;
 173
 174                         dev_put(netdev);
 175
 176                         /* not wireless device -- return error */
 177                         if (!tmp)
 178                                 return ERR_PTR(-EINVAL);
 179
 180                         /* mismatch -- return error */
 181                         if (rdev && tmp != rdev)
 182                                 return ERR_PTR(-EINVAL);
 183
 184                         rdev = tmp;
 185                 }
 186         }
 187
 188         if (!rdev)
 189                 return ERR_PTR(-ENODEV);
 190
 191         if (netns != wiphy_net(&rdev->wiphy))
 192                 return ERR_PTR(-ENODEV);
 193
 194         return rdev;
 195 }
 196
 197 /*
 198  * This function returns a pointer to the driver
 199  * that the genl_info item that is passed refers to.
 200  *
 201  * The result of this can be a PTR_ERR and hence must
 202  * be checked with IS_ERR() for errors.
 203  */
 204 static struct cfg80211_registered_device *
 205 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 206 {
 207         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 208 }
 209
 210 /* policy for the attributes */
 211 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 212         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 213         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 214                                       .len = 20-1 },
 215         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 216
 217         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 218         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 219         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 220         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 222
 223         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 224         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 225         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 226         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 227         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 228
 229         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 231         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 232
 233         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 234         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 235
 236         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 237         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 238                                     .len = WLAN_MAX_KEY_LEN },
 239         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 240         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 241         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 242         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 243         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 244
 245         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 246         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 247         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 248                                        .len = IEEE80211_MAX_DATA_LEN },
 249         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 250                                        .len = IEEE80211_MAX_DATA_LEN },
 251         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 252         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 253         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 254         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 255                                                .len = NL80211_MAX_SUPP_RATES },
 256         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 257         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 258         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 259         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 260                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 261         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 262
 263         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 264         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 265
 266         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 267         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 268         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 269         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 270                                            .len = NL80211_MAX_SUPP_RATES },
 271         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 272
 273         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 274         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 275
 276         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 277
 278         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 280                               .len = IEEE80211_MAX_DATA_LEN },
 281         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 282         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 283
 284         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 285                                 .len = IEEE80211_MAX_SSID_LEN },
 286         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 287         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 288         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 289         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 290         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 291         [NL80211_ATTR_STA_FLAGS2] = {
 292                 .len = sizeof(struct nl80211_sta_flag_update),
 293         },
 294         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 295         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 296         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 297         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 298         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 300         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 301         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 302         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 303                                  .len = WLAN_PMKID_LEN },
 304         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 305         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 306         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 308                                  .len = IEEE80211_MAX_DATA_LEN },
 309         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 310         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 311         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 312         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 313         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 314         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 315         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 316         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 317         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 318         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 319         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 320         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 322         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 323         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 325         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 328         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 329                                          .len = IEEE80211_MAX_DATA_LEN },
 330         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 331                                          .len = IEEE80211_MAX_DATA_LEN },
 332         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 335         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 336         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 337         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 338         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 339         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 340         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 341         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 342                                       .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 344         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 346                 .len = NL80211_HT_CAPABILITY_LEN
 347         },
 348         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 349         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 350         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 351         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 352         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 353         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 354         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 355         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 356         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 357         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 358         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 359         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 360         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 361         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 362         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 363         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 364         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 365                 .len = NL80211_VHT_CAPABILITY_LEN,
 366         },
 367         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 368         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 369                                   .len = IEEE80211_MAX_DATA_LEN },
 370         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 371         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 372         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 373         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 374         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_U16 },
 375         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_U16 },
 376         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 377         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 378         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 379         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 380         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 381         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 382         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 383 };
 384
 385 /* policy for the key attributes */
 386 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 387         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 388         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 389         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 390         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 391         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 392         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 393         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 394         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 395 };
 396
 397 /* policy for the key default flags */
 398 static const struct nla_policy
 399 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 400         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 401         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 402 };
 403
 404 /* policy for WoWLAN attributes */
 405 static const struct nla_policy
 406 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 407         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 408         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 409         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 410         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 411         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 412         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 413         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 414         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 415         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 416 };
 417
 418 static const struct nla_policy
 419 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 420         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 421         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 422         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 423         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 424         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 425         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 426         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 427                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 428         },
 429         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 430                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 431         },
 432         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 433         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 434         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 435 };
 436
 437 /* policy for coalesce rule attributes */
 438 static const struct nla_policy
 439 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 440         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 441         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 442         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 443 };
 444
 445 /* policy for GTK rekey offload attributes */
 446 static const struct nla_policy
 447 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 448         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 449         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 450         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 451 };
 452
 453 static const struct nla_policy
 454 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 455         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 456                                                  .len = IEEE80211_MAX_SSID_LEN },
 457         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 458 };
 459
 460 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 461                                      struct netlink_callback *cb,
 462                                      struct cfg80211_registered_device **rdev,
 463                                      struct wireless_dev **wdev)
 464 {
 465         int err;
 466
 467         rtnl_lock();
 468
 469         if (!cb->args[0]) {
 470                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 471                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 472                                   nl80211_policy);
 473                 if (err)
 474                         goto out_unlock;
 475
 476                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 477                                                    nl80211_fam.attrbuf);
 478                 if (IS_ERR(*wdev)) {
 479                         err = PTR_ERR(*wdev);
 480                         goto out_unlock;
 481                 }
 482                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 483                 /* 0 is the first index - add 1 to parse only once */
 484                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 485                 cb->args[1] = (*wdev)->identifier;
 486         } else {
 487                 /* subtract the 1 again here */
 488                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 489                 struct wireless_dev *tmp;
 490
 491                 if (!wiphy) {
 492                         err = -ENODEV;
 493                         goto out_unlock;
 494                 }
 495                 *rdev = wiphy_to_dev(wiphy);
 496                 *wdev = NULL;
 497
 498                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 499                         if (tmp->identifier == cb->args[1]) {
 500                                 *wdev = tmp;
 501                                 break;
 502                         }
 503                 }
 504
 505                 if (!*wdev) {
 506                         err = -ENODEV;
 507                         goto out_unlock;
 508                 }
 509         }
 510
 511         return 0;
 512  out_unlock:
 513         rtnl_unlock();
 514         return err;
 515 }
 516
 517 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 518 {
 519         rtnl_unlock();
 520 }
 521
 522 /* IE validation */
 523 static bool is_valid_ie_attr(const struct nlattr *attr)
 524 {
 525         const u8 *pos;
 526         int len;
 527
 528         if (!attr)
 529                 return true;
 530
 531         pos = nla_data(attr);
 532         len = nla_len(attr);
 533
 534         while (len) {
 535                 u8 elemlen;
 536
 537                 if (len < 2)
 538                         return false;
 539                 len -= 2;
 540
 541                 elemlen = pos[1];
 542                 if (elemlen > len)
 543                         return false;
 544
 545                 len -= elemlen;
 546                 pos += 2 + elemlen;
 547         }
 548
 549         return true;
 550 }
 551
 552 /* message building helper */
 553 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 554                                    int flags, u8 cmd)
 555 {
 556         /* since there is no private header just add the generic one */
 557         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 558 }
 559
 560 static int nl80211_msg_put_channel(struct sk_buff *msg,
 561                                    struct ieee80211_channel *chan,
 562                                    bool large)
 563 {
 564         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 565                         chan->center_freq))
 566                 goto nla_put_failure;
 567
 568         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 569             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 570                 goto nla_put_failure;
 571         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 572                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 573                         goto nla_put_failure;
 574                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 575                         goto nla_put_failure;
 576         }
 577         if (chan->flags & IEEE80211_CHAN_RADAR) {
 578                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 579                         goto nla_put_failure;
 580                 if (large) {
 581                         u32 time;
 582
 583                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 584
 585                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 586                                         chan->dfs_state))
 587                                 goto nla_put_failure;
 588                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 589                                         time))
 590                                 goto nla_put_failure;
 591                 }
 592         }
 593
 594         if (large) {
 595                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 596                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 597                         goto nla_put_failure;
 598                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 599                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 600                         goto nla_put_failure;
 601                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 602                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 603                         goto nla_put_failure;
 604                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 605                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 606                         goto nla_put_failure;
 607         }
 608
 609         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 610                         DBM_TO_MBM(chan->max_power)))
 611                 goto nla_put_failure;
 612
 613         return 0;
 614
 615  nla_put_failure:
 616         return -ENOBUFS;
 617 }
 618
 619 /* netlink command implementations */
 620
 621 struct key_parse {
 622         struct key_params p;
 623         int idx;
 624         int type;
 625         bool def, defmgmt;
 626         bool def_uni, def_multi;
 627 };
 628
 629 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 630 {
 631         struct nlattr *tb[NL80211_KEY_MAX + 1];
 632         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 633                                    nl80211_key_policy);
 634         if (err)
 635                 return err;
 636
 637         k->def = !!tb[NL80211_KEY_DEFAULT];
 638         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 639
 640         if (k->def) {
 641                 k->def_uni = true;
 642                 k->def_multi = true;
 643         }
 644         if (k->defmgmt)
 645                 k->def_multi = true;
 646
 647         if (tb[NL80211_KEY_IDX])
 648                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 649
 650         if (tb[NL80211_KEY_DATA]) {
 651                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 652                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 653         }
 654
 655         if (tb[NL80211_KEY_SEQ]) {
 656                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 657                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 658         }
 659
 660         if (tb[NL80211_KEY_CIPHER])
 661                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 662
 663         if (tb[NL80211_KEY_TYPE]) {
 664                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 665                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 666                         return -EINVAL;
 667         }
 668
 669         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 670                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 671                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 672                                        tb[NL80211_KEY_DEFAULT_TYPES],
 673                                        nl80211_key_default_policy);
 674                 if (err)
 675                         return err;
 676
 677                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 678                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 679         }
 680
 681         return 0;
 682 }
 683
 684 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 685 {
 686         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 687                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 688                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 689         }
 690
 691         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 692                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 693                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 694         }
 695
 696         if (info->attrs[NL80211_ATTR_KEY_IDX])
 697                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 698
 699         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 700                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 701
 702         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 703         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 704
 705         if (k->def) {
 706                 k->def_uni = true;
 707                 k->def_multi = true;
 708         }
 709         if (k->defmgmt)
 710                 k->def_multi = true;
 711
 712         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 713                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 714                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 715                         return -EINVAL;
 716         }
 717
 718         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 719                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 720                 int err = nla_parse_nested(
 721                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 722                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 723                                 nl80211_key_default_policy);
 724                 if (err)
 725                         return err;
 726
 727                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 728                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 729         }
 730
 731         return 0;
 732 }
 733
 734 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 735 {
 736         int err;
 737
 738         memset(k, 0, sizeof(*k));
 739         k->idx = -1;
 740         k->type = -1;
 741
 742         if (info->attrs[NL80211_ATTR_KEY])
 743                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 744         else
 745                 err = nl80211_parse_key_old(info, k);
 746
 747         if (err)
 748                 return err;
 749
 750         if (k->def && k->defmgmt)
 751                 return -EINVAL;
 752
 753         if (k->defmgmt) {
 754                 if (k->def_uni || !k->def_multi)
 755                         return -EINVAL;
 756         }
 757
 758         if (k->idx != -1) {
 759                 if (k->defmgmt) {
 760                         if (k->idx < 4 || k->idx > 5)
 761                                 return -EINVAL;
 762                 } else if (k->def) {
 763                         if (k->idx < 0 || k->idx > 3)
 764                                 return -EINVAL;
 765                 } else {
 766                         if (k->idx < 0 || k->idx > 5)
 767                                 return -EINVAL;
 768                 }
 769         }
 770
 771         return 0;
 772 }
 773
 774 static struct cfg80211_cached_keys *
 775 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 776                        struct nlattr *keys, bool *no_ht)
 777 {
 778         struct key_parse parse;
 779         struct nlattr *key;
 780         struct cfg80211_cached_keys *result;
 781         int rem, err, def = 0;
 782
 783         result = kzalloc(sizeof(*result), GFP_KERNEL);
 784         if (!result)
 785                 return ERR_PTR(-ENOMEM);
 786
 787         result->def = -1;
 788         result->defmgmt = -1;
 789
 790         nla_for_each_nested(key, keys, rem) {
 791                 memset(&parse, 0, sizeof(parse));
 792                 parse.idx = -1;
 793
 794                 err = nl80211_parse_key_new(key, &parse);
 795                 if (err)
 796                         goto error;
 797                 err = -EINVAL;
 798                 if (!parse.p.key)
 799                         goto error;
 800                 if (parse.idx < 0 || parse.idx > 4)
 801                         goto error;
 802                 if (parse.def) {
 803                         if (def)
 804                                 goto error;
 805                         def = 1;
 806                         result->def = parse.idx;
 807                         if (!parse.def_uni || !parse.def_multi)
 808                                 goto error;
 809                 } else if (parse.defmgmt)
 810                         goto error;
 811                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 812                                                      parse.idx, false, NULL);
 813                 if (err)
 814                         goto error;
 815                 result->params[parse.idx].cipher = parse.p.cipher;
 816                 result->params[parse.idx].key_len = parse.p.key_len;
 817                 result->params[parse.idx].key = result->data[parse.idx];
 818                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 819
 820                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 821                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 822                         if (no_ht)
 823                                 *no_ht = true;
 824                 }
 825         }
 826
 827         return result;
 828  error:
 829         kfree(result);
 830         return ERR_PTR(err);
 831 }
 832
 833 static int nl80211_key_allowed(struct wireless_dev *wdev)
 834 {
 835         ASSERT_WDEV_LOCK(wdev);
 836
 837         switch (wdev->iftype) {
 838         case NL80211_IFTYPE_AP:
 839         case NL80211_IFTYPE_AP_VLAN:
 840         case NL80211_IFTYPE_P2P_GO:
 841         case NL80211_IFTYPE_MESH_POINT:
 842                 break;
 843         case NL80211_IFTYPE_ADHOC:
 844         case NL80211_IFTYPE_STATION:
 845         case NL80211_IFTYPE_P2P_CLIENT:
 846                 if (!wdev->current_bss)
 847                         return -ENOLINK;
 848                 break;
 849         default:
 850                 return -EINVAL;
 851         }
 852
 853         return 0;
 854 }
 855
 856 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 857 {
 858         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 859         int i;
 860
 861         if (!nl_modes)
 862                 goto nla_put_failure;
 863
 864         i = 0;
 865         while (ifmodes) {
 866                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 867                         goto nla_put_failure;
 868                 ifmodes >>= 1;
 869                 i++;
 870         }
 871
 872         nla_nest_end(msg, nl_modes);
 873         return 0;
 874
 875 nla_put_failure:
 876         return -ENOBUFS;
 877 }
 878
 879 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 880                                           struct sk_buff *msg,
 881                                           bool large)
 882 {
 883         struct nlattr *nl_combis;
 884         int i, j;
 885
 886         nl_combis = nla_nest_start(msg,
 887                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 888         if (!nl_combis)
 889                 goto nla_put_failure;
 890
 891         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 892                 const struct ieee80211_iface_combination *c;
 893                 struct nlattr *nl_combi, *nl_limits;
 894
 895                 c = &wiphy->iface_combinations[i];
 896
 897                 nl_combi = nla_nest_start(msg, i + 1);
 898                 if (!nl_combi)
 899                         goto nla_put_failure;
 900
 901                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 902                 if (!nl_limits)
 903                         goto nla_put_failure;
 904
 905                 for (j = 0; j < c->n_limits; j++) {
 906                         struct nlattr *nl_limit;
 907
 908                         nl_limit = nla_nest_start(msg, j + 1);
 909                         if (!nl_limit)
 910                                 goto nla_put_failure;
 911                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 912                                         c->limits[j].max))
 913                                 goto nla_put_failure;
 914                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 915                                                 c->limits[j].types))
 916                                 goto nla_put_failure;
 917                         nla_nest_end(msg, nl_limit);
 918                 }
 919
 920                 nla_nest_end(msg, nl_limits);
 921
 922                 if (c->beacon_int_infra_match &&
 923                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 924                         goto nla_put_failure;
 925                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 926                                 c->num_different_channels) ||
 927                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 928                                 c->max_interfaces))
 929                         goto nla_put_failure;
 930                 if (large &&
 931                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 932                                 c->radar_detect_widths))
 933                         goto nla_put_failure;
 934
 935                 nla_nest_end(msg, nl_combi);
 936         }
 937
 938         nla_nest_end(msg, nl_combis);
 939
 940         return 0;
 941 nla_put_failure:
 942         return -ENOBUFS;
 943 }
 944
 945 #ifdef CONFIG_PM
 946 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 947                                         struct sk_buff *msg)
 948 {
 949         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 950         struct nlattr *nl_tcp;
 951
 952         if (!tcp)
 953                 return 0;
 954
 955         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 956         if (!nl_tcp)
 957                 return -ENOBUFS;
 958
 959         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 960                         tcp->data_payload_max))
 961                 return -ENOBUFS;
 962
 963         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 964                         tcp->data_payload_max))
 965                 return -ENOBUFS;
 966
 967         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 968                 return -ENOBUFS;
 969
 970         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 971                                 sizeof(*tcp->tok), tcp->tok))
 972                 return -ENOBUFS;
 973
 974         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 975                         tcp->data_interval_max))
 976                 return -ENOBUFS;
 977
 978         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 979                         tcp->wake_payload_max))
 980                 return -ENOBUFS;
 981
 982         nla_nest_end(msg, nl_tcp);
 983         return 0;
 984 }
 985
 986 static int nl80211_send_wowlan(struct sk_buff *msg,
 987                                struct cfg80211_registered_device *dev,
 988                                bool large)
 989 {
 990         struct nlattr *nl_wowlan;
 991
 992         if (!dev->wiphy.wowlan)
 993                 return 0;
 994
 995         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 996         if (!nl_wowlan)
 997                 return -ENOBUFS;
 998
 999         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1000              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1001             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1002              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1003             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1004              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1005             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1006              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1007             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1008              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1009             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1010              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1011             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1012              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1013             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1014              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1015                 return -ENOBUFS;
1016
1017         if (dev->wiphy.wowlan->n_patterns) {
1018                 struct nl80211_pattern_support pat = {
1019                         .max_patterns = dev->wiphy.wowlan->n_patterns,
1020                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
1021                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
1022                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
1023                 };
1024
1025                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1026                             sizeof(pat), &pat))
1027                         return -ENOBUFS;
1028         }
1029
1030         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1031                 return -ENOBUFS;
1032
1033         nla_nest_end(msg, nl_wowlan);
1034
1035         return 0;
1036 }
1037 #endif
1038
1039 static int nl80211_send_coalesce(struct sk_buff *msg,
1040                                  struct cfg80211_registered_device *dev)
1041 {
1042         struct nl80211_coalesce_rule_support rule;
1043
1044         if (!dev->wiphy.coalesce)
1045                 return 0;
1046
1047         rule.max_rules = dev->wiphy.coalesce->n_rules;
1048         rule.max_delay = dev->wiphy.coalesce->max_delay;
1049         rule.pat.max_patterns = dev->wiphy.coalesce->n_patterns;
1050         rule.pat.min_pattern_len = dev->wiphy.coalesce->pattern_min_len;
1051         rule.pat.max_pattern_len = dev->wiphy.coalesce->pattern_max_len;
1052         rule.pat.max_pkt_offset = dev->wiphy.coalesce->max_pkt_offset;
1053
1054         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1055                 return -ENOBUFS;
1056
1057         return 0;
1058 }
1059
1060 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1061                                       struct ieee80211_supported_band *sband)
1062 {
1063         struct nlattr *nl_rates, *nl_rate;
1064         struct ieee80211_rate *rate;
1065         int i;
1066
1067         /* add HT info */
1068         if (sband->ht_cap.ht_supported &&
1069             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1070                      sizeof(sband->ht_cap.mcs),
1071                      &sband->ht_cap.mcs) ||
1072              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1073                          sband->ht_cap.cap) ||
1074              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1075                         sband->ht_cap.ampdu_factor) ||
1076              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1077                         sband->ht_cap.ampdu_density)))
1078                 return -ENOBUFS;
1079
1080         /* add VHT info */
1081         if (sband->vht_cap.vht_supported &&
1082             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1083                      sizeof(sband->vht_cap.vht_mcs),
1084                      &sband->vht_cap.vht_mcs) ||
1085              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1086                          sband->vht_cap.cap)))
1087                 return -ENOBUFS;
1088
1089         /* add bitrates */
1090         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1091         if (!nl_rates)
1092                 return -ENOBUFS;
1093
1094         for (i = 0; i < sband->n_bitrates; i++) {
1095                 nl_rate = nla_nest_start(msg, i);
1096                 if (!nl_rate)
1097                         return -ENOBUFS;
1098
1099                 rate = &sband->bitrates[i];
1100                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1101                                 rate->bitrate))
1102                         return -ENOBUFS;
1103                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1104                     nla_put_flag(msg,
1105                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1106                         return -ENOBUFS;
1107
1108                 nla_nest_end(msg, nl_rate);
1109         }
1110
1111         nla_nest_end(msg, nl_rates);
1112
1113         return 0;
1114 }
1115
1116 static int
1117 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1118                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1119 {
1120         u16 stypes;
1121         struct nlattr *nl_ftypes, *nl_ifs;
1122         enum nl80211_iftype ift;
1123         int i;
1124
1125         if (!mgmt_stypes)
1126                 return 0;
1127
1128         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1129         if (!nl_ifs)
1130                 return -ENOBUFS;
1131
1132         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1133                 nl_ftypes = nla_nest_start(msg, ift);
1134                 if (!nl_ftypes)
1135                         return -ENOBUFS;
1136                 i = 0;
1137                 stypes = mgmt_stypes[ift].tx;
1138                 while (stypes) {
1139                         if ((stypes & 1) &&
1140                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1141                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1142                                 return -ENOBUFS;
1143                         stypes >>= 1;
1144                         i++;
1145                 }
1146                 nla_nest_end(msg, nl_ftypes);
1147         }
1148
1149         nla_nest_end(msg, nl_ifs);
1150
1151         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1152         if (!nl_ifs)
1153                 return -ENOBUFS;
1154
1155         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1156                 nl_ftypes = nla_nest_start(msg, ift);
1157                 if (!nl_ftypes)
1158                         return -ENOBUFS;
1159                 i = 0;
1160                 stypes = mgmt_stypes[ift].rx;
1161                 while (stypes) {
1162                         if ((stypes & 1) &&
1163                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1164                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1165                                 return -ENOBUFS;
1166                         stypes >>= 1;
1167                         i++;
1168                 }
1169                 nla_nest_end(msg, nl_ftypes);
1170         }
1171         nla_nest_end(msg, nl_ifs);
1172
1173         return 0;
1174 }
1175
1176 struct nl80211_dump_wiphy_state {
1177         s64 filter_wiphy;
1178         long start;
1179         long split_start, band_start, chan_start;
1180         bool split;
1181 };
1182
1183 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1184                               struct sk_buff *msg, u32 portid, u32 seq,
1185                               int flags, struct nl80211_dump_wiphy_state *state)
1186 {
1187         void *hdr;
1188         struct nlattr *nl_bands, *nl_band;
1189         struct nlattr *nl_freqs, *nl_freq;
1190         struct nlattr *nl_cmds;
1191         struct nlattr *nl_vendor_cmds;
1192         enum ieee80211_band band;
1193         struct ieee80211_channel *chan;
1194         int i;
1195         const struct ieee80211_txrx_stypes *mgmt_stypes =
1196                                 dev->wiphy.mgmt_stypes;
1197         u32 features;
1198
1199         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1200         if (!hdr)
1201                 return -ENOBUFS;
1202
1203         if (WARN_ON(!state))
1204                 return -EINVAL;
1205
1206         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1207             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1208                            wiphy_name(&dev->wiphy)) ||
1209             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1210                         cfg80211_rdev_list_generation))
1211                 goto nla_put_failure;
1212
1213         switch (state->split_start) {
1214         case 0:
1215                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1216                                dev->wiphy.retry_short) ||
1217                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1218                                dev->wiphy.retry_long) ||
1219                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1220                                 dev->wiphy.frag_threshold) ||
1221                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1222                                 dev->wiphy.rts_threshold) ||
1223                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1224                                dev->wiphy.coverage_class) ||
1225                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1226                                dev->wiphy.max_scan_ssids) ||
1227                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1228                                dev->wiphy.max_sched_scan_ssids) ||
1229                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1230                                 dev->wiphy.max_scan_ie_len) ||
1231                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1232                                 dev->wiphy.max_sched_scan_ie_len) ||
1233                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1234                                dev->wiphy.max_match_sets))
1235                         goto nla_put_failure;
1236
1237                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1238                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1239                         goto nla_put_failure;
1240                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1241                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1242                         goto nla_put_failure;
1243                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1244                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1245                         goto nla_put_failure;
1246                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1247                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1248                         goto nla_put_failure;
1249                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1250                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1251                         goto nla_put_failure;
1252                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1253                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1254                         goto nla_put_failure;
1255                 state->split_start++;
1256                 if (state->split)
1257                         break;
1258         case 1:
1259                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1260                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1261                             dev->wiphy.cipher_suites))
1262                         goto nla_put_failure;
1263
1264                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1265                                dev->wiphy.max_num_pmkids))
1266                         goto nla_put_failure;
1267
1268                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1269                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1270                         goto nla_put_failure;
1271
1272                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1273                                 dev->wiphy.available_antennas_tx) ||
1274                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1275                                 dev->wiphy.available_antennas_rx))
1276                         goto nla_put_failure;
1277
1278                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1279                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1280                                 dev->wiphy.probe_resp_offload))
1281                         goto nla_put_failure;
1282
1283                 if ((dev->wiphy.available_antennas_tx ||
1284                      dev->wiphy.available_antennas_rx) &&
1285                     dev->ops->get_antenna) {
1286                         u32 tx_ant = 0, rx_ant = 0;
1287                         int res;
1288                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1289                         if (!res) {
1290                                 if (nla_put_u32(msg,
1291                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1292                                                 tx_ant) ||
1293                                     nla_put_u32(msg,
1294                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1295                                                 rx_ant))
1296                                         goto nla_put_failure;
1297                         }
1298                 }
1299
1300                 state->split_start++;
1301                 if (state->split)
1302                         break;
1303         case 2:
1304                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1305                                         dev->wiphy.interface_modes))
1306                                 goto nla_put_failure;
1307                 state->split_start++;
1308                 if (state->split)
1309                         break;
1310         case 3:
1311                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1312                 if (!nl_bands)
1313                         goto nla_put_failure;
1314
1315                 for (band = state->band_start;
1316                      band < IEEE80211_NUM_BANDS; band++) {
1317                         struct ieee80211_supported_band *sband;
1318
1319                         sband = dev->wiphy.bands[band];
1320
1321                         if (!sband)
1322                                 continue;
1323
1324                         nl_band = nla_nest_start(msg, band);
1325                         if (!nl_band)
1326                                 goto nla_put_failure;
1327
1328                         switch (state->chan_start) {
1329                         case 0:
1330                                 if (nl80211_send_band_rateinfo(msg, sband))
1331                                         goto nla_put_failure;
1332                                 state->chan_start++;
1333                                 if (state->split)
1334                                         break;
1335                         default:
1336                                 /* add frequencies */
1337                                 nl_freqs = nla_nest_start(
1338                                         msg, NL80211_BAND_ATTR_FREQS);
1339                                 if (!nl_freqs)
1340                                         goto nla_put_failure;
1341
1342                                 for (i = state->chan_start - 1;
1343                                      i < sband->n_channels;
1344                                      i++) {
1345                                         nl_freq = nla_nest_start(msg, i);
1346                                         if (!nl_freq)
1347                                                 goto nla_put_failure;
1348
1349                                         chan = &sband->channels[i];
1350
1351                                         if (nl80211_msg_put_channel(
1352                                                         msg, chan,
1353                                                         state->split))
1354                                                 goto nla_put_failure;
1355
1356                                         nla_nest_end(msg, nl_freq);
1357                                         if (state->split)
1358                                                 break;
1359                                 }
1360                                 if (i < sband->n_channels)
1361                                         state->chan_start = i + 2;
1362                                 else
1363                                         state->chan_start = 0;
1364                                 nla_nest_end(msg, nl_freqs);
1365                         }
1366
1367                         nla_nest_end(msg, nl_band);
1368
1369                         if (state->split) {
1370                                 /* start again here */
1371                                 if (state->chan_start)
1372                                         band--;
1373                                 break;
1374                         }
1375                 }
1376                 nla_nest_end(msg, nl_bands);
1377
1378                 if (band < IEEE80211_NUM_BANDS)
1379                         state->band_start = band + 1;
1380                 else
1381                         state->band_start = 0;
1382
1383                 /* if bands & channels are done, continue outside */
1384                 if (state->band_start == 0 && state->chan_start == 0)
1385                         state->split_start++;
1386                 if (state->split)
1387                         break;
1388         case 4:
1389                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1390                 if (!nl_cmds)
1391                         goto nla_put_failure;
1392
1393                 i = 0;
1394 #define CMD(op, n)                                                      \
1395                  do {                                                   \
1396                         if (dev->ops->op) {                             \
1397                                 i++;                                    \
1398                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1399                                         goto nla_put_failure;           \
1400                         }                                               \
1401                 } while (0)
1402
1403                 CMD(add_virtual_intf, NEW_INTERFACE);
1404                 CMD(change_virtual_intf, SET_INTERFACE);
1405                 CMD(add_key, NEW_KEY);
1406                 CMD(start_ap, START_AP);
1407                 CMD(add_station, NEW_STATION);
1408                 CMD(add_mpath, NEW_MPATH);
1409                 CMD(update_mesh_config, SET_MESH_CONFIG);
1410                 CMD(change_bss, SET_BSS);
1411                 CMD(auth, AUTHENTICATE);
1412                 CMD(assoc, ASSOCIATE);
1413                 CMD(deauth, DEAUTHENTICATE);
1414                 CMD(disassoc, DISASSOCIATE);
1415                 CMD(join_ibss, JOIN_IBSS);
1416                 CMD(join_mesh, JOIN_MESH);
1417                 CMD(set_pmksa, SET_PMKSA);
1418                 CMD(del_pmksa, DEL_PMKSA);
1419                 CMD(flush_pmksa, FLUSH_PMKSA);
1420                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1421                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1422                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1423                 CMD(mgmt_tx, FRAME);
1424                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1425                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1426                         i++;
1427                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1428                                 goto nla_put_failure;
1429                 }
1430                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1431                     dev->ops->join_mesh) {
1432                         i++;
1433                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1434                                 goto nla_put_failure;
1435                 }
1436                 CMD(set_wds_peer, SET_WDS_PEER);
1437                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1438                         CMD(tdls_mgmt, TDLS_MGMT);
1439                         CMD(tdls_oper, TDLS_OPER);
1440                 }
1441                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1442                         CMD(sched_scan_start, START_SCHED_SCAN);
1443                 CMD(probe_client, PROBE_CLIENT);
1444                 CMD(set_noack_map, SET_NOACK_MAP);
1445                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1446                         i++;
1447                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1448                                 goto nla_put_failure;
1449                 }
1450                 CMD(start_p2p_device, START_P2P_DEVICE);
1451                 CMD(set_mcast_rate, SET_MCAST_RATE);
1452                 if (state->split) {
1453                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1454                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1455                         if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1456                                 CMD(channel_switch, CHANNEL_SWITCH);
1457                 }
1458
1459 #ifdef CONFIG_NL80211_TESTMODE
1460                 CMD(testmode_cmd, TESTMODE);
1461 #endif
1462
1463 #undef CMD
1464
1465                 if (dev->ops->connect || dev->ops->auth) {
1466                         i++;
1467                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1468                                 goto nla_put_failure;
1469                 }
1470
1471                 if (dev->ops->disconnect || dev->ops->deauth) {
1472                         i++;
1473                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1474                                 goto nla_put_failure;
1475                 }
1476
1477                 nla_nest_end(msg, nl_cmds);
1478                 state->split_start++;
1479                 if (state->split)
1480                         break;
1481         case 5:
1482                 if (dev->ops->remain_on_channel &&
1483                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1484                     nla_put_u32(msg,
1485                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1486                                 dev->wiphy.max_remain_on_channel_duration))
1487                         goto nla_put_failure;
1488
1489                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1490                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1491                         goto nla_put_failure;
1492
1493                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1494                         goto nla_put_failure;
1495                 state->split_start++;
1496                 if (state->split)
1497                         break;
1498         case 6:
1499 #ifdef CONFIG_PM
1500                 if (nl80211_send_wowlan(msg, dev, state->split))
1501                         goto nla_put_failure;
1502                 state->split_start++;
1503                 if (state->split)
1504                         break;
1505 #else
1506                 state->split_start++;
1507 #endif
1508         case 7:
1509                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1510                                         dev->wiphy.software_iftypes))
1511                         goto nla_put_failure;
1512
1513                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1514                                                    state->split))
1515                         goto nla_put_failure;
1516
1517                 state->split_start++;
1518                 if (state->split)
1519                         break;
1520         case 8:
1521                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1522                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1523                                 dev->wiphy.ap_sme_capa))
1524                         goto nla_put_failure;
1525
1526                 features = dev->wiphy.features;
1527                 /*
1528                  * We can only add the per-channel limit information if the
1529                  * dump is split, otherwise it makes it too big. Therefore
1530                  * only advertise it in that case.
1531                  */
1532                 if (state->split)
1533                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1534                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1535                         goto nla_put_failure;
1536
1537                 if (dev->wiphy.ht_capa_mod_mask &&
1538                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1539                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1540                             dev->wiphy.ht_capa_mod_mask))
1541                         goto nla_put_failure;
1542
1543                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1544                     dev->wiphy.max_acl_mac_addrs &&
1545                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1546                                 dev->wiphy.max_acl_mac_addrs))
1547                         goto nla_put_failure;
1548
1549                 /*
1550                  * Any information below this point is only available to
1551                  * applications that can deal with it being split. This
1552                  * helps ensure that newly added capabilities don't break
1553                  * older tools by overrunning their buffers.
1554                  *
1555                  * We still increment split_start so that in the split
1556                  * case we'll continue with more data in the next round,
1557                  * but break unconditionally so unsplit data stops here.
1558                  */
1559                 state->split_start++;
1560                 break;
1561         case 9:
1562                 if (dev->wiphy.extended_capabilities &&
1563                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1564                              dev->wiphy.extended_capabilities_len,
1565                              dev->wiphy.extended_capabilities) ||
1566                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1567                              dev->wiphy.extended_capabilities_len,
1568                              dev->wiphy.extended_capabilities_mask)))
1569                         goto nla_put_failure;
1570
1571                 if (dev->wiphy.vht_capa_mod_mask &&
1572                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1573                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1574                             dev->wiphy.vht_capa_mod_mask))
1575                         goto nla_put_failure;
1576
1577                 state->split_start++;
1578                 break;
1579         case 10:
1580                 if (nl80211_send_coalesce(msg, dev))
1581                         goto nla_put_failure;
1582
1583                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1584                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1585                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1586                         goto nla_put_failure;
1587                 state->split_start++;
1588                 break;
1589         case 11:
1590                 nl_vendor_cmds = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1591                 if (!nl_vendor_cmds)
1592                         goto nla_put_failure;
1593
1594                 for (i = 0; i < dev->wiphy.n_vendor_commands; i++)
1595                         if (nla_put(msg, i + 1,
1596                                     sizeof(struct nl80211_vendor_cmd_info),
1597                                     &dev->wiphy.vendor_commands[i].info))
1598                                 goto nla_put_failure;
1599                 nla_nest_end(msg, nl_vendor_cmds);
1600
1601                 /* done */
1602                 state->split_start = 0;
1603                 break;
1604         }
1605         return genlmsg_end(msg, hdr);
1606
1607  nla_put_failure:
1608         genlmsg_cancel(msg, hdr);
1609         return -EMSGSIZE;
1610 }
1611
1612 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1613                                     struct netlink_callback *cb,
1614                                     struct nl80211_dump_wiphy_state *state)
1615 {
1616         struct nlattr **tb = nl80211_fam.attrbuf;
1617         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1618                               tb, nl80211_fam.maxattr, nl80211_policy);
1619         /* ignore parse errors for backward compatibility */
1620         if (ret)
1621                 return 0;
1622
1623         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1624         if (tb[NL80211_ATTR_WIPHY])
1625                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1626         if (tb[NL80211_ATTR_WDEV])
1627                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1628         if (tb[NL80211_ATTR_IFINDEX]) {
1629                 struct net_device *netdev;
1630                 struct cfg80211_registered_device *rdev;
1631                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1632
1633                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1634                 if (!netdev)
1635                         return -ENODEV;
1636                 if (netdev->ieee80211_ptr) {
1637                         rdev = wiphy_to_dev(
1638                                 netdev->ieee80211_ptr->wiphy);
1639                         state->filter_wiphy = rdev->wiphy_idx;
1640                 }
1641                 dev_put(netdev);
1642         }
1643
1644         return 0;
1645 }
1646
1647 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1648 {
1649         int idx = 0, ret;
1650         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1651         struct cfg80211_registered_device *dev;
1652
1653         rtnl_lock();
1654         if (!state) {
1655                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1656                 if (!state) {
1657                         rtnl_unlock();
1658                         return -ENOMEM;
1659                 }
1660                 state->filter_wiphy = -1;
1661                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1662                 if (ret) {
1663                         kfree(state);
1664                         rtnl_unlock();
1665                         return ret;
1666                 }
1667                 cb->args[0] = (long)state;
1668         }
1669
1670         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1671                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1672                         continue;
1673                 if (++idx <= state->start)
1674                         continue;
1675                 if (state->filter_wiphy != -1 &&
1676                     state->filter_wiphy != dev->wiphy_idx)
1677                         continue;
1678                 /* attempt to fit multiple wiphy data chunks into the skb */
1679                 do {
1680                         ret = nl80211_send_wiphy(dev, skb,
1681                                                  NETLINK_CB(cb->skb).portid,
1682                                                  cb->nlh->nlmsg_seq,
1683                                                  NLM_F_MULTI, state);
1684                         if (ret < 0) {
1685                                 /*
1686                                  * If sending the wiphy data didn't fit (ENOBUFS
1687                                  * or EMSGSIZE returned), this SKB is still
1688                                  * empty (so it's not too big because another
1689                                  * wiphy dataset is already in the skb) and
1690                                  * we've not tried to adjust the dump allocation
1691                                  * yet ... then adjust the alloc size to be
1692                                  * bigger, and return 1 but with the empty skb.
1693                                  * This results in an empty message being RX'ed
1694                                  * in userspace, but that is ignored.
1695                                  *
1696                                  * We can then retry with the larger buffer.
1697                                  */
1698                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1699                                     !skb->len &&
1700                                     cb->min_dump_alloc < 4096) {
1701                                         cb->min_dump_alloc = 4096;
1702                                         rtnl_unlock();
1703                                         return 1;
1704                                 }
1705                                 idx--;
1706                                 break;
1707                         }
1708                 } while (state->split_start > 0);
1709                 break;
1710         }
1711         rtnl_unlock();
1712
1713         state->start = idx;
1714
1715         return skb->len;
1716 }
1717
1718 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1719 {
1720         kfree((void *)cb->args[0]);
1721         return 0;
1722 }
1723
1724 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1725 {
1726         struct sk_buff *msg;
1727         struct cfg80211_registered_device *dev = info->user_ptr[0];
1728         struct nl80211_dump_wiphy_state state = {};
1729
1730         msg = nlmsg_new(4096, GFP_KERNEL);
1731         if (!msg)
1732                 return -ENOMEM;
1733
1734         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1735                                &state) < 0) {
1736                 nlmsg_free(msg);
1737                 return -ENOBUFS;
1738         }
1739
1740         return genlmsg_reply(msg, info);
1741 }
1742
1743 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1744         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1745         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1746         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1747         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1748         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1749 };
1750
1751 static int parse_txq_params(struct nlattr *tb[],
1752                             struct ieee80211_txq_params *txq_params)
1753 {
1754         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1755             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1756             !tb[NL80211_TXQ_ATTR_AIFS])
1757                 return -EINVAL;
1758
1759         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1760         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1761         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1762         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1763         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1764
1765         if (txq_params->ac >= NL80211_NUM_ACS)
1766                 return -EINVAL;
1767
1768         return 0;
1769 }
1770
1771 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1772 {
1773         /*
1774          * You can only set the channel explicitly for WDS interfaces,
1775          * all others have their channel managed via their respective
1776          * "establish a connection" command (connect, join, ...)
1777          *
1778          * For AP/GO and mesh mode, the channel can be set with the
1779          * channel userspace API, but is only stored and passed to the
1780          * low-level driver when the AP starts or the mesh is joined.
1781          * This is for backward compatibility, userspace can also give
1782          * the channel in the start-ap or join-mesh commands instead.
1783          *
1784          * Monitors are special as they are normally slaved to
1785          * whatever else is going on, so they have their own special
1786          * operation to set the monitor channel if possible.
1787          */
1788         return !wdev ||
1789                 wdev->iftype == NL80211_IFTYPE_AP ||
1790                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1791                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1792                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1793 }
1794
1795 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1796                                  struct genl_info *info,
1797                                  struct cfg80211_chan_def *chandef)
1798 {
1799         u32 control_freq;
1800
1801         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1802                 return -EINVAL;
1803
1804         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1805
1806         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1807         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1808         chandef->center_freq1 = control_freq;
1809         chandef->center_freq2 = 0;
1810
1811         /* Primary channel not allowed */
1812         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1813                 return -EINVAL;
1814
1815         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1816                 enum nl80211_channel_type chantype;
1817
1818                 chantype = nla_get_u32(
1819                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1820
1821                 switch (chantype) {
1822                 case NL80211_CHAN_NO_HT:
1823                 case NL80211_CHAN_HT20:
1824                 case NL80211_CHAN_HT40PLUS:
1825                 case NL80211_CHAN_HT40MINUS:
1826                         cfg80211_chandef_create(chandef, chandef->chan,
1827                                                 chantype);
1828                         break;
1829                 default:
1830                         return -EINVAL;
1831                 }
1832         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1833                 chandef->width =
1834                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1835                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1836                         chandef->center_freq1 =
1837                                 nla_get_u32(
1838                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1839                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1840                         chandef->center_freq2 =
1841                                 nla_get_u32(
1842                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1843         }
1844
1845         if (!cfg80211_chandef_valid(chandef))
1846                 return -EINVAL;
1847
1848         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1849                                      IEEE80211_CHAN_DISABLED))
1850                 return -EINVAL;
1851
1852         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1853              chandef->width == NL80211_CHAN_WIDTH_10) &&
1854             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1855                 return -EINVAL;
1856
1857         return 0;
1858 }
1859
1860 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1861                                  struct wireless_dev *wdev,
1862                                  struct genl_info *info)
1863 {
1864         struct cfg80211_chan_def chandef;
1865         int result;
1866         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1867
1868         if (wdev)
1869                 iftype = wdev->iftype;
1870
1871         if (!nl80211_can_set_dev_channel(wdev))
1872                 return -EOPNOTSUPP;
1873
1874         result = nl80211_parse_chandef(rdev, info, &chandef);
1875         if (result)
1876                 return result;
1877
1878         switch (iftype) {
1879         case NL80211_IFTYPE_AP:
1880         case NL80211_IFTYPE_P2P_GO:
1881                 if (wdev->beacon_interval) {
1882                         result = -EBUSY;
1883                         break;
1884                 }
1885                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1886                         result = -EINVAL;
1887                         break;
1888                 }
1889                 wdev->preset_chandef = chandef;
1890                 result = 0;
1891                 break;
1892         case NL80211_IFTYPE_MESH_POINT:
1893                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1894                 break;
1895         case NL80211_IFTYPE_MONITOR:
1896                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1897                 break;
1898         default:
1899                 result = -EINVAL;
1900         }
1901
1902         return result;
1903 }
1904
1905 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1906 {
1907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1908         struct net_device *netdev = info->user_ptr[1];
1909
1910         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1911 }
1912
1913 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1914 {
1915         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1916         struct net_device *dev = info->user_ptr[1];
1917         struct wireless_dev *wdev = dev->ieee80211_ptr;
1918         const u8 *bssid;
1919
1920         if (!info->attrs[NL80211_ATTR_MAC])
1921                 return -EINVAL;
1922
1923         if (netif_running(dev))
1924                 return -EBUSY;
1925
1926         if (!rdev->ops->set_wds_peer)
1927                 return -EOPNOTSUPP;
1928
1929         if (wdev->iftype != NL80211_IFTYPE_WDS)
1930                 return -EOPNOTSUPP;
1931
1932         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1933         return rdev_set_wds_peer(rdev, dev, bssid);
1934 }
1935
1936
1937 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1938 {
1939         struct cfg80211_registered_device *rdev;
1940         struct net_device *netdev = NULL;
1941         struct wireless_dev *wdev;
1942         int result = 0, rem_txq_params = 0;
1943         struct nlattr *nl_txq_params;
1944         u32 changed;
1945         u8 retry_short = 0, retry_long = 0;
1946         u32 frag_threshold = 0, rts_threshold = 0;
1947         u8 coverage_class = 0;
1948
1949         ASSERT_RTNL();
1950
1951         /*
1952          * Try to find the wiphy and netdev. Normally this
1953          * function shouldn't need the netdev, but this is
1954          * done for backward compatibility -- previously
1955          * setting the channel was done per wiphy, but now
1956          * it is per netdev. Previous userland like hostapd
1957          * also passed a netdev to set_wiphy, so that it is
1958          * possible to let that go to the right netdev!
1959          */
1960
1961         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1962                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1963
1964                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1965                 if (netdev && netdev->ieee80211_ptr)
1966                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1967                 else
1968                         netdev = NULL;
1969         }
1970
1971         if (!netdev) {
1972                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1973                                                   info->attrs);
1974                 if (IS_ERR(rdev))
1975                         return PTR_ERR(rdev);
1976                 wdev = NULL;
1977                 netdev = NULL;
1978                 result = 0;
1979         } else
1980                 wdev = netdev->ieee80211_ptr;
1981
1982         /*
1983          * end workaround code, by now the rdev is available
1984          * and locked, and wdev may or may not be NULL.
1985          */
1986
1987         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1988                 result = cfg80211_dev_rename(
1989                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1990
1991         if (result)
1992                 goto bad_res;
1993
1994         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1995                 struct ieee80211_txq_params txq_params;
1996                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1997
1998                 if (!rdev->ops->set_txq_params) {
1999                         result = -EOPNOTSUPP;
2000                         goto bad_res;
2001                 }
2002
2003                 if (!netdev) {
2004                         result = -EINVAL;
2005                         goto bad_res;
2006                 }
2007
2008                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2009                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
2010                         result = -EINVAL;
2011                         goto bad_res;
2012                 }
2013
2014                 if (!netif_running(netdev)) {
2015                         result = -ENETDOWN;
2016                         goto bad_res;
2017                 }
2018
2019                 nla_for_each_nested(nl_txq_params,
2020                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2021                                     rem_txq_params) {
2022                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2023                                   nla_data(nl_txq_params),
2024                                   nla_len(nl_txq_params),
2025                                   txq_params_policy);
2026                         result = parse_txq_params(tb, &txq_params);
2027                         if (result)
2028                                 goto bad_res;
2029
2030                         result = rdev_set_txq_params(rdev, netdev,
2031                                                      &txq_params);
2032                         if (result)
2033                                 goto bad_res;
2034                 }
2035         }
2036
2037         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2038                 result = __nl80211_set_channel(rdev,
2039                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
2040                                 info);
2041                 if (result)
2042                         goto bad_res;
2043         }
2044
2045         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2046                 struct wireless_dev *txp_wdev = wdev;
2047                 enum nl80211_tx_power_setting type;
2048                 int idx, mbm = 0;
2049
2050                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2051                         txp_wdev = NULL;
2052
2053                 if (!rdev->ops->set_tx_power) {
2054                         result = -EOPNOTSUPP;
2055                         goto bad_res;
2056                 }
2057
2058                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2059                 type = nla_get_u32(info->attrs[idx]);
2060
2061                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2062                     (type != NL80211_TX_POWER_AUTOMATIC)) {
2063                         result = -EINVAL;
2064                         goto bad_res;
2065                 }
2066
2067                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2068                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2069                         mbm = nla_get_u32(info->attrs[idx]);
2070                 }
2071
2072                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2073                 if (result)
2074                         goto bad_res;
2075         }
2076
2077         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2078             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2079                 u32 tx_ant, rx_ant;
2080                 if ((!rdev->wiphy.available_antennas_tx &&
2081                      !rdev->wiphy.available_antennas_rx) ||
2082                     !rdev->ops->set_antenna) {
2083                         result = -EOPNOTSUPP;
2084                         goto bad_res;
2085                 }
2086
2087                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2088                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2089
2090                 /* reject antenna configurations which don't match the
2091                  * available antenna masks, except for the "all" mask */
2092                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2093                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2094                         result = -EINVAL;
2095                         goto bad_res;
2096                 }
2097
2098                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2099                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2100
2101                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2102                 if (result)
2103                         goto bad_res;
2104         }
2105
2106         changed = 0;
2107
2108         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2109                 retry_short = nla_get_u8(
2110                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2111                 if (retry_short == 0) {
2112                         result = -EINVAL;
2113                         goto bad_res;
2114                 }
2115                 changed |= WIPHY_PARAM_RETRY_SHORT;
2116         }
2117
2118         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2119                 retry_long = nla_get_u8(
2120                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2121                 if (retry_long == 0) {
2122                         result = -EINVAL;
2123                         goto bad_res;
2124                 }
2125                 changed |= WIPHY_PARAM_RETRY_LONG;
2126         }
2127
2128         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2129                 frag_threshold = nla_get_u32(
2130                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2131                 if (frag_threshold < 256) {
2132                         result = -EINVAL;
2133                         goto bad_res;
2134                 }
2135                 if (frag_threshold != (u32) -1) {
2136                         /*
2137                          * Fragments (apart from the last one) are required to
2138                          * have even length. Make the fragmentation code
2139                          * simpler by stripping LSB should someone try to use
2140                          * odd threshold value.
2141                          */
2142                         frag_threshold &= ~0x1;
2143                 }
2144                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2145         }
2146
2147         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2148                 rts_threshold = nla_get_u32(
2149                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2150                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2151         }
2152
2153         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2154                 coverage_class = nla_get_u8(
2155                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2156                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2157         }
2158
2159         if (changed) {
2160                 u8 old_retry_short, old_retry_long;
2161                 u32 old_frag_threshold, old_rts_threshold;
2162                 u8 old_coverage_class;
2163
2164                 if (!rdev->ops->set_wiphy_params) {
2165                         result = -EOPNOTSUPP;
2166                         goto bad_res;
2167                 }
2168
2169                 old_retry_short = rdev->wiphy.retry_short;
2170                 old_retry_long = rdev->wiphy.retry_long;
2171                 old_frag_threshold = rdev->wiphy.frag_threshold;
2172                 old_rts_threshold = rdev->wiphy.rts_threshold;
2173                 old_coverage_class = rdev->wiphy.coverage_class;
2174
2175                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2176                         rdev->wiphy.retry_short = retry_short;
2177                 if (changed & WIPHY_PARAM_RETRY_LONG)
2178                         rdev->wiphy.retry_long = retry_long;
2179                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2180                         rdev->wiphy.frag_threshold = frag_threshold;
2181                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2182                         rdev->wiphy.rts_threshold = rts_threshold;
2183                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2184                         rdev->wiphy.coverage_class = coverage_class;
2185
2186                 result = rdev_set_wiphy_params(rdev, changed);
2187                 if (result) {
2188                         rdev->wiphy.retry_short = old_retry_short;
2189                         rdev->wiphy.retry_long = old_retry_long;
2190                         rdev->wiphy.frag_threshold = old_frag_threshold;
2191                         rdev->wiphy.rts_threshold = old_rts_threshold;
2192                         rdev->wiphy.coverage_class = old_coverage_class;
2193                 }
2194         }
2195
2196  bad_res:
2197         if (netdev)
2198                 dev_put(netdev);
2199         return result;
2200 }
2201
2202 static inline u64 wdev_id(struct wireless_dev *wdev)
2203 {
2204         return (u64)wdev->identifier |
2205                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2206 }
2207
2208 static int nl80211_send_chandef(struct sk_buff *msg,
2209                                 const struct cfg80211_chan_def *chandef)
2210 {
2211         WARN_ON(!cfg80211_chandef_valid(chandef));
2212
2213         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2214                         chandef->chan->center_freq))
2215                 return -ENOBUFS;
2216         switch (chandef->width) {
2217         case NL80211_CHAN_WIDTH_20_NOHT:
2218         case NL80211_CHAN_WIDTH_20:
2219         case NL80211_CHAN_WIDTH_40:
2220                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2221                                 cfg80211_get_chandef_type(chandef)))
2222                         return -ENOBUFS;
2223                 break;
2224         default:
2225                 break;
2226         }
2227         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2228                 return -ENOBUFS;
2229         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2230                 return -ENOBUFS;
2231         if (chandef->center_freq2 &&
2232             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2233                 return -ENOBUFS;
2234         return 0;
2235 }
2236
2237 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2238                               struct cfg80211_registered_device *rdev,
2239                               struct wireless_dev *wdev)
2240 {
2241         struct net_device *dev = wdev->netdev;
2242         void *hdr;
2243
2244         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2245         if (!hdr)
2246                 return -1;
2247
2248         if (dev &&
2249             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2250              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2251                 goto nla_put_failure;
2252
2253         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2254             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2255             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2256             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2257             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2258                         rdev->devlist_generation ^
2259                         (cfg80211_rdev_list_generation << 2)))
2260                 goto nla_put_failure;
2261
2262         if (rdev->ops->get_channel) {
2263                 int ret;
2264                 struct cfg80211_chan_def chandef;
2265
2266                 ret = rdev_get_channel(rdev, wdev, &chandef);
2267                 if (ret == 0) {
2268                         if (nl80211_send_chandef(msg, &chandef))
2269                                 goto nla_put_failure;
2270                 }
2271         }
2272
2273         if (wdev->ssid_len) {
2274                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2275                         goto nla_put_failure;
2276         }
2277
2278         return genlmsg_end(msg, hdr);
2279
2280  nla_put_failure:
2281         genlmsg_cancel(msg, hdr);
2282         return -EMSGSIZE;
2283 }
2284
2285 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2286 {
2287         int wp_idx = 0;
2288         int if_idx = 0;
2289         int wp_start = cb->args[0];
2290         int if_start = cb->args[1];
2291         struct cfg80211_registered_device *rdev;
2292         struct wireless_dev *wdev;
2293
2294         rtnl_lock();
2295         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2296                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2297                         continue;
2298                 if (wp_idx < wp_start) {
2299                         wp_idx++;
2300                         continue;
2301                 }
2302                 if_idx = 0;
2303
2304                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2305                         if (if_idx < if_start) {
2306                                 if_idx++;
2307                                 continue;
2308                         }
2309                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2310                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2311                                                rdev, wdev) < 0) {
2312                                 goto out;
2313                         }
2314                         if_idx++;
2315                 }
2316
2317                 wp_idx++;
2318         }
2319  out:
2320         rtnl_unlock();
2321
2322         cb->args[0] = wp_idx;
2323         cb->args[1] = if_idx;
2324
2325         return skb->len;
2326 }
2327
2328 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2329 {
2330         struct sk_buff *msg;
2331         struct cfg80211_registered_device *dev = info->user_ptr[0];
2332         struct wireless_dev *wdev = info->user_ptr[1];
2333
2334         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2335         if (!msg)
2336                 return -ENOMEM;
2337
2338         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2339                                dev, wdev) < 0) {
2340                 nlmsg_free(msg);
2341                 return -ENOBUFS;
2342         }
2343
2344         return genlmsg_reply(msg, info);
2345 }
2346
2347 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2348         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2349         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2350         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2351         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2352         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2353         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2354 };
2355
2356 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2357 {
2358         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2359         int flag;
2360
2361         *mntrflags = 0;
2362
2363         if (!nla)
2364                 return -EINVAL;
2365
2366         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2367                              nla, mntr_flags_policy))
2368                 return -EINVAL;
2369
2370         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2371                 if (flags[flag])
2372                         *mntrflags |= (1<<flag);
2373
2374         return 0;
2375 }
2376
2377 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2378                                struct net_device *netdev, u8 use_4addr,
2379                                enum nl80211_iftype iftype)
2380 {
2381         if (!use_4addr) {
2382                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2383                         return -EBUSY;
2384                 return 0;
2385         }
2386
2387         switch (iftype) {
2388         case NL80211_IFTYPE_AP_VLAN:
2389                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2390                         return 0;
2391                 break;
2392         case NL80211_IFTYPE_STATION:
2393                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2394                         return 0;
2395                 break;
2396         default:
2397                 break;
2398         }
2399
2400         return -EOPNOTSUPP;
2401 }
2402
2403 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2404 {
2405         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2406         struct vif_params params;
2407         int err;
2408         enum nl80211_iftype otype, ntype;
2409         struct net_device *dev = info->user_ptr[1];
2410         u32 _flags, *flags = NULL;
2411         bool change = false;
2412
2413         memset(&params, 0, sizeof(params));
2414
2415         otype = ntype = dev->ieee80211_ptr->iftype;
2416
2417         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2418                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2419                 if (otype != ntype)
2420                         change = true;
2421                 if (ntype > NL80211_IFTYPE_MAX)
2422                         return -EINVAL;
2423         }
2424
2425         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2426                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2427
2428                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2429                         return -EINVAL;
2430                 if (netif_running(dev))
2431                         return -EBUSY;
2432
2433                 wdev_lock(wdev);
2434                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2435                              IEEE80211_MAX_MESH_ID_LEN);
2436                 wdev->mesh_id_up_len =
2437                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2438                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2439                        wdev->mesh_id_up_len);
2440                 wdev_unlock(wdev);
2441         }
2442
2443         if (info->attrs[NL80211_ATTR_4ADDR]) {
2444                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2445                 change = true;
2446                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2447                 if (err)
2448                         return err;
2449         } else {
2450                 params.use_4addr = -1;
2451         }
2452
2453         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2454                 if (ntype != NL80211_IFTYPE_MONITOR)
2455                         return -EINVAL;
2456                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2457                                           &_flags);
2458                 if (err)
2459                         return err;
2460
2461                 flags = &_flags;
2462                 change = true;
2463         }
2464
2465         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2466             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2467                 return -EOPNOTSUPP;
2468
2469         if (change)
2470                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2471         else
2472                 err = 0;
2473
2474         if (!err && params.use_4addr != -1)
2475                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2476
2477         return err;
2478 }
2479
2480 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2481 {
2482         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2483         struct vif_params params;
2484         struct wireless_dev *wdev;
2485         struct sk_buff *msg;
2486         int err;
2487         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2488         u32 flags;
2489
2490         memset(&params, 0, sizeof(params));
2491
2492         if (!info->attrs[NL80211_ATTR_IFNAME])
2493                 return -EINVAL;
2494
2495         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2496                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2497                 if (type > NL80211_IFTYPE_MAX)
2498                         return -EINVAL;
2499         }
2500
2501         if (!rdev->ops->add_virtual_intf ||
2502             !(rdev->wiphy.interface_modes & (1 << type)))
2503                 return -EOPNOTSUPP;
2504
2505         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2506                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2507                            ETH_ALEN);
2508                 if (!is_valid_ether_addr(params.macaddr))
2509                         return -EADDRNOTAVAIL;
2510         }
2511
2512         if (info->attrs[NL80211_ATTR_4ADDR]) {
2513                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2514                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2515                 if (err)
2516                         return err;
2517         }
2518
2519         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2520         if (!msg)
2521                 return -ENOMEM;
2522
2523         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2524                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2525                                   &flags);
2526
2527         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2528             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2529                 return -EOPNOTSUPP;
2530
2531         wdev = rdev_add_virtual_intf(rdev,
2532                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2533                                 type, err ? NULL : &flags, &params);
2534         if (IS_ERR(wdev)) {
2535                 nlmsg_free(msg);
2536                 return PTR_ERR(wdev);
2537         }
2538
2539         switch (type) {
2540         case NL80211_IFTYPE_MESH_POINT:
2541                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2542                         break;
2543                 wdev_lock(wdev);
2544                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2545                              IEEE80211_MAX_MESH_ID_LEN);
2546                 wdev->mesh_id_up_len =
2547                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2548                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2549                        wdev->mesh_id_up_len);
2550                 wdev_unlock(wdev);
2551                 break;
2552         case NL80211_IFTYPE_P2P_DEVICE:
2553                 /*
2554                  * P2P Device doesn't have a netdev, so doesn't go
2555                  * through the netdev notifier and must be added here
2556                  */
2557                 mutex_init(&wdev->mtx);
2558                 INIT_LIST_HEAD(&wdev->event_list);
2559                 spin_lock_init(&wdev->event_lock);
2560                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2561                 spin_lock_init(&wdev->mgmt_registrations_lock);
2562
2563                 wdev->identifier = ++rdev->wdev_id;
2564                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2565                 rdev->devlist_generation++;
2566                 break;
2567         default:
2568                 break;
2569         }
2570
2571         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2572                                rdev, wdev) < 0) {
2573                 nlmsg_free(msg);
2574                 return -ENOBUFS;
2575         }
2576
2577         return genlmsg_reply(msg, info);
2578 }
2579
2580 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2581 {
2582         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2583         struct wireless_dev *wdev = info->user_ptr[1];
2584
2585         if (!rdev->ops->del_virtual_intf)
2586                 return -EOPNOTSUPP;
2587
2588         /*
2589          * If we remove a wireless device without a netdev then clear
2590          * user_ptr[1] so that nl80211_post_doit won't dereference it
2591          * to check if it needs to do dev_put(). Otherwise it crashes
2592          * since the wdev has been freed, unlike with a netdev where
2593          * we need the dev_put() for the netdev to really be freed.
2594          */
2595         if (!wdev->netdev)
2596                 info->user_ptr[1] = NULL;
2597
2598         return rdev_del_virtual_intf(rdev, wdev);
2599 }
2600
2601 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2602 {
2603         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2604         struct net_device *dev = info->user_ptr[1];
2605         u16 noack_map;
2606
2607         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2608                 return -EINVAL;
2609
2610         if (!rdev->ops->set_noack_map)
2611                 return -EOPNOTSUPP;
2612
2613         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2614
2615         return rdev_set_noack_map(rdev, dev, noack_map);
2616 }
2617
2618 struct get_key_cookie {
2619         struct sk_buff *msg;
2620         int error;
2621         int idx;
2622 };
2623
2624 static void get_key_callback(void *c, struct key_params *params)
2625 {
2626         struct nlattr *key;
2627         struct get_key_cookie *cookie = c;
2628
2629         if ((params->key &&
2630              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2631                      params->key_len, params->key)) ||
2632             (params->seq &&
2633              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2634                      params->seq_len, params->seq)) ||
2635             (params->cipher &&
2636              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2637                          params->cipher)))
2638                 goto nla_put_failure;
2639
2640         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2641         if (!key)
2642                 goto nla_put_failure;
2643
2644         if ((params->key &&
2645              nla_put(cookie->msg, NL80211_KEY_DATA,
2646                      params->key_len, params->key)) ||
2647             (params->seq &&
2648              nla_put(cookie->msg, NL80211_KEY_SEQ,
2649                      params->seq_len, params->seq)) ||
2650             (params->cipher &&
2651              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2652                          params->cipher)))
2653                 goto nla_put_failure;
2654
2655         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2656                 goto nla_put_failure;
2657
2658         nla_nest_end(cookie->msg, key);
2659
2660         return;
2661  nla_put_failure:
2662         cookie->error = 1;
2663 }
2664
2665 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2666 {
2667         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2668         int err;
2669         struct net_device *dev = info->user_ptr[1];
2670         u8 key_idx = 0;
2671         const u8 *mac_addr = NULL;
2672         bool pairwise;
2673         struct get_key_cookie cookie = {
2674                 .error = 0,
2675         };
2676         void *hdr;
2677         struct sk_buff *msg;
2678
2679         if (info->attrs[NL80211_ATTR_KEY_IDX])
2680                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2681
2682         if (key_idx > 5)
2683                 return -EINVAL;
2684
2685         if (info->attrs[NL80211_ATTR_MAC])
2686                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2687
2688         pairwise = !!mac_addr;
2689         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2690                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2691                 if (kt >= NUM_NL80211_KEYTYPES)
2692                         return -EINVAL;
2693                 if (kt != NL80211_KEYTYPE_GROUP &&
2694                     kt != NL80211_KEYTYPE_PAIRWISE)
2695                         return -EINVAL;
2696                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2697         }
2698
2699         if (!rdev->ops->get_key)
2700                 return -EOPNOTSUPP;
2701
2702         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2703         if (!msg)
2704                 return -ENOMEM;
2705
2706         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2707                              NL80211_CMD_NEW_KEY);
2708         if (!hdr)
2709                 goto nla_put_failure;
2710
2711         cookie.msg = msg;
2712         cookie.idx = key_idx;
2713
2714         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2715             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2716                 goto nla_put_failure;
2717         if (mac_addr &&
2718             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2719                 goto nla_put_failure;
2720
2721         if (pairwise && mac_addr &&
2722             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2723                 return -ENOENT;
2724
2725         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2726                            get_key_callback);
2727
2728         if (err)
2729                 goto free_msg;
2730
2731         if (cookie.error)
2732                 goto nla_put_failure;
2733
2734         genlmsg_end(msg, hdr);
2735         return genlmsg_reply(msg, info);
2736
2737  nla_put_failure:
2738         err = -ENOBUFS;
2739  free_msg:
2740         nlmsg_free(msg);
2741         return err;
2742 }
2743
2744 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2745 {
2746         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2747         struct key_parse key;
2748         int err;
2749         struct net_device *dev = info->user_ptr[1];
2750
2751         err = nl80211_parse_key(info, &key);
2752         if (err)
2753                 return err;
2754
2755         if (key.idx < 0)
2756                 return -EINVAL;
2757
2758         /* only support setting default key */
2759         if (!key.def && !key.defmgmt)
2760                 return -EINVAL;
2761
2762         wdev_lock(dev->ieee80211_ptr);
2763
2764         if (key.def) {
2765                 if (!rdev->ops->set_default_key) {
2766                         err = -EOPNOTSUPP;
2767                         goto out;
2768                 }
2769
2770                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2771                 if (err)
2772                         goto out;
2773
2774                 err = rdev_set_default_key(rdev, dev, key.idx,
2775                                                  key.def_uni, key.def_multi);
2776
2777                 if (err)
2778                         goto out;
2779
2780 #ifdef CONFIG_CFG80211_WEXT
2781                 dev->ieee80211_ptr->wext.default_key = key.idx;
2782 #endif
2783         } else {
2784                 if (key.def_uni || !key.def_multi) {
2785                         err = -EINVAL;
2786                         goto out;
2787                 }
2788
2789                 if (!rdev->ops->set_default_mgmt_key) {
2790                         err = -EOPNOTSUPP;
2791                         goto out;
2792                 }
2793
2794                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2795                 if (err)
2796                         goto out;
2797
2798                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2799                 if (err)
2800                         goto out;
2801
2802 #ifdef CONFIG_CFG80211_WEXT
2803                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2804 #endif
2805         }
2806
2807  out:
2808         wdev_unlock(dev->ieee80211_ptr);
2809
2810         return err;
2811 }
2812
2813 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2814 {
2815         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2816         int err;
2817         struct net_device *dev = info->user_ptr[1];
2818         struct key_parse key;
2819         const u8 *mac_addr = NULL;
2820
2821         err = nl80211_parse_key(info, &key);
2822         if (err)
2823                 return err;
2824
2825         if (!key.p.key)
2826                 return -EINVAL;
2827
2828         if (info->attrs[NL80211_ATTR_MAC])
2829                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2830
2831         if (key.type == -1) {
2832                 if (mac_addr)
2833                         key.type = NL80211_KEYTYPE_PAIRWISE;
2834                 else
2835                         key.type = NL80211_KEYTYPE_GROUP;
2836         }
2837
2838         /* for now */
2839         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2840             key.type != NL80211_KEYTYPE_GROUP)
2841                 return -EINVAL;
2842
2843         if (!rdev->ops->add_key)
2844                 return -EOPNOTSUPP;
2845
2846         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2847                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2848                                            mac_addr))
2849                 return -EINVAL;
2850
2851         wdev_lock(dev->ieee80211_ptr);
2852         err = nl80211_key_allowed(dev->ieee80211_ptr);
2853         if (!err)
2854                 err = rdev_add_key(rdev, dev, key.idx,
2855                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2856                                     mac_addr, &key.p);
2857         wdev_unlock(dev->ieee80211_ptr);
2858
2859         return err;
2860 }
2861
2862 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2863 {
2864         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2865         int err;
2866         struct net_device *dev = info->user_ptr[1];
2867         u8 *mac_addr = NULL;
2868         struct key_parse key;
2869
2870         err = nl80211_parse_key(info, &key);
2871         if (err)
2872                 return err;
2873
2874         if (info->attrs[NL80211_ATTR_MAC])
2875                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2876
2877         if (key.type == -1) {
2878                 if (mac_addr)
2879                         key.type = NL80211_KEYTYPE_PAIRWISE;
2880                 else
2881                         key.type = NL80211_KEYTYPE_GROUP;
2882         }
2883
2884         /* for now */
2885         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2886             key.type != NL80211_KEYTYPE_GROUP)
2887                 return -EINVAL;
2888
2889         if (!rdev->ops->del_key)
2890                 return -EOPNOTSUPP;
2891
2892         wdev_lock(dev->ieee80211_ptr);
2893         err = nl80211_key_allowed(dev->ieee80211_ptr);
2894
2895         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2896             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2897                 err = -ENOENT;
2898
2899         if (!err)
2900                 err = rdev_del_key(rdev, dev, key.idx,
2901                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2902                                    mac_addr);
2903
2904 #ifdef CONFIG_CFG80211_WEXT
2905         if (!err) {
2906                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2907                         dev->ieee80211_ptr->wext.default_key = -1;
2908                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2909                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2910         }
2911 #endif
2912         wdev_unlock(dev->ieee80211_ptr);
2913
2914         return err;
2915 }
2916
2917 /* This function returns an error or the number of nested attributes */
2918 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2919 {
2920         struct nlattr *attr;
2921         int n_entries = 0, tmp;
2922
2923         nla_for_each_nested(attr, nl_attr, tmp) {
2924                 if (nla_len(attr) != ETH_ALEN)
2925                         return -EINVAL;
2926
2927                 n_entries++;
2928         }
2929
2930         return n_entries;
2931 }
2932
2933 /*
2934  * This function parses ACL information and allocates memory for ACL data.
2935  * On successful return, the calling function is responsible to free the
2936  * ACL buffer returned by this function.
2937  */
2938 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2939                                                 struct genl_info *info)
2940 {
2941         enum nl80211_acl_policy acl_policy;
2942         struct nlattr *attr;
2943         struct cfg80211_acl_data *acl;
2944         int i = 0, n_entries, tmp;
2945
2946         if (!wiphy->max_acl_mac_addrs)
2947                 return ERR_PTR(-EOPNOTSUPP);
2948
2949         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2950                 return ERR_PTR(-EINVAL);
2951
2952         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2953         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2954             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2955                 return ERR_PTR(-EINVAL);
2956
2957         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2958                 return ERR_PTR(-EINVAL);
2959
2960         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2961         if (n_entries < 0)
2962                 return ERR_PTR(n_entries);
2963
2964         if (n_entries > wiphy->max_acl_mac_addrs)
2965                 return ERR_PTR(-ENOTSUPP);
2966
2967         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2968                       GFP_KERNEL);
2969         if (!acl)
2970                 return ERR_PTR(-ENOMEM);
2971
2972         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2973                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2974                 i++;
2975         }
2976
2977         acl->n_acl_entries = n_entries;
2978         acl->acl_policy = acl_policy;
2979
2980         return acl;
2981 }
2982
2983 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2984 {
2985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2986         struct net_device *dev = info->user_ptr[1];
2987         struct cfg80211_acl_data *acl;
2988         int err;
2989
2990         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2991             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2992                 return -EOPNOTSUPP;
2993
2994         if (!dev->ieee80211_ptr->beacon_interval)
2995                 return -EINVAL;
2996
2997         acl = parse_acl_data(&rdev->wiphy, info);
2998         if (IS_ERR(acl))
2999                 return PTR_ERR(acl);
3000
3001         err = rdev_set_mac_acl(rdev, dev, acl);
3002
3003         kfree(acl);
3004
3005         return err;
3006 }
3007
3008 static int nl80211_parse_beacon(struct nlattr *attrs[],
3009                                 struct cfg80211_beacon_data *bcn)
3010 {
3011         bool haveinfo = false;
3012
3013         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3014             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3015             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3016             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3017                 return -EINVAL;
3018
3019         memset(bcn, 0, sizeof(*bcn));
3020
3021         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3022                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3023                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3024                 if (!bcn->head_len)
3025                         return -EINVAL;
3026                 haveinfo = true;
3027         }
3028
3029         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3030                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3031                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3032                 haveinfo = true;
3033         }
3034
3035         if (!haveinfo)
3036                 return -EINVAL;
3037
3038         if (attrs[NL80211_ATTR_IE]) {
3039                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3040                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3041         }
3042
3043         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3044                 bcn->proberesp_ies =
3045                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3046                 bcn->proberesp_ies_len =
3047                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3048         }
3049
3050         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3051                 bcn->assocresp_ies =
3052                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3053                 bcn->assocresp_ies_len =
3054                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3055         }
3056
3057         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3058                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3059                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3060         }
3061
3062         return 0;
3063 }
3064
3065 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3066                                    struct cfg80211_ap_settings *params)
3067 {
3068         struct wireless_dev *wdev;
3069         bool ret = false;
3070
3071         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3072                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3073                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3074                         continue;
3075
3076                 if (!wdev->preset_chandef.chan)
3077                         continue;
3078
3079                 params->chandef = wdev->preset_chandef;
3080                 ret = true;
3081                 break;
3082         }
3083
3084         return ret;
3085 }
3086
3087 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3088                                     enum nl80211_auth_type auth_type,
3089                                     enum nl80211_commands cmd)
3090 {
3091         if (auth_type > NL80211_AUTHTYPE_MAX)
3092                 return false;
3093
3094         switch (cmd) {
3095         case NL80211_CMD_AUTHENTICATE:
3096                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3097                     auth_type == NL80211_AUTHTYPE_SAE)
3098                         return false;
3099                 return true;
3100         case NL80211_CMD_CONNECT:
3101         case NL80211_CMD_START_AP:
3102                 /* SAE not supported yet */
3103                 if (auth_type == NL80211_AUTHTYPE_SAE)
3104                         return false;
3105                 return true;
3106         default:
3107                 return false;
3108         }
3109 }
3110
3111 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3112 {
3113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3114         struct net_device *dev = info->user_ptr[1];
3115         struct wireless_dev *wdev = dev->ieee80211_ptr;
3116         struct cfg80211_ap_settings params;
3117         int err;
3118         u8 radar_detect_width = 0;
3119
3120         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3121             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3122                 return -EOPNOTSUPP;
3123
3124         if (!rdev->ops->start_ap)
3125                 return -EOPNOTSUPP;
3126
3127         if (wdev->beacon_interval)
3128                 return -EALREADY;
3129
3130         memset(&params, 0, sizeof(params));
3131
3132         /* these are required for START_AP */
3133         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3134             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3135             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3136                 return -EINVAL;
3137
3138         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3139         if (err)
3140                 return err;
3141
3142         params.beacon_interval =
3143                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3144         params.dtim_period =
3145                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3146
3147         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3148         if (err)
3149                 return err;
3150
3151         /*
3152          * In theory, some of these attributes should be required here
3153          * but since they were not used when the command was originally
3154          * added, keep them optional for old user space programs to let
3155          * them continue to work with drivers that do not need the
3156          * additional information -- drivers must check!
3157          */
3158         if (info->attrs[NL80211_ATTR_SSID]) {
3159                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3160                 params.ssid_len =
3161                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3162                 if (params.ssid_len == 0 ||
3163                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3164                         return -EINVAL;
3165         }
3166
3167         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3168                 params.hidden_ssid = nla_get_u32(
3169                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3170                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3171                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3172                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3173                         return -EINVAL;
3174         }
3175
3176         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3177
3178         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3179                 params.auth_type = nla_get_u32(
3180                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3181                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3182                                              NL80211_CMD_START_AP))
3183                         return -EINVAL;
3184         } else
3185                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3186
3187         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3188                                       NL80211_MAX_NR_CIPHER_SUITES);
3189         if (err)
3190                 return err;
3191
3192         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3193                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3194                         return -EOPNOTSUPP;
3195                 params.inactivity_timeout = nla_get_u16(
3196                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3197         }
3198
3199         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3200                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3201                         return -EINVAL;
3202                 params.p2p_ctwindow =
3203                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3204                 if (params.p2p_ctwindow > 127)
3205                         return -EINVAL;
3206                 if (params.p2p_ctwindow != 0 &&
3207                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3208                         return -EINVAL;
3209         }
3210
3211         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3212                 u8 tmp;
3213
3214                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3215                         return -EINVAL;
3216                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3217                 if (tmp > 1)
3218                         return -EINVAL;
3219                 params.p2p_opp_ps = tmp;
3220                 if (params.p2p_opp_ps != 0 &&
3221                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3222                         return -EINVAL;
3223         }
3224
3225         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3226                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3227                 if (err)
3228                         return err;
3229         } else if (wdev->preset_chandef.chan) {
3230                 params.chandef = wdev->preset_chandef;
3231         } else if (!nl80211_get_ap_channel(rdev, &params))
3232                 return -EINVAL;
3233
3234         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3235                 return -EINVAL;
3236
3237         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3238         if (err < 0)
3239                 return err;
3240         if (err) {
3241                 radar_detect_width = BIT(params.chandef.width);
3242                 params.radar_required = true;
3243         }
3244
3245         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3246                                            params.chandef.chan,
3247                                            CHAN_MODE_SHARED,
3248                                            radar_detect_width);
3249         if (err)
3250                 return err;
3251
3252         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3253                 params.acl = parse_acl_data(&rdev->wiphy, info);
3254                 if (IS_ERR(params.acl))
3255                         return PTR_ERR(params.acl);
3256         }
3257
3258         wdev_lock(wdev);
3259         err = rdev_start_ap(rdev, dev, &params);
3260         if (!err) {
3261                 wdev->preset_chandef = params.chandef;
3262                 wdev->beacon_interval = params.beacon_interval;
3263                 wdev->channel = params.chandef.chan;
3264                 wdev->ssid_len = params.ssid_len;
3265                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3266         }
3267         wdev_unlock(wdev);
3268
3269         kfree(params.acl);
3270
3271         return err;
3272 }
3273
3274 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3275 {
3276         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3277         struct net_device *dev = info->user_ptr[1];
3278         struct wireless_dev *wdev = dev->ieee80211_ptr;
3279         struct cfg80211_beacon_data params;
3280         int err;
3281
3282         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3283             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3284                 return -EOPNOTSUPP;
3285
3286         if (!rdev->ops->change_beacon)
3287                 return -EOPNOTSUPP;
3288
3289         if (!wdev->beacon_interval)
3290                 return -EINVAL;
3291
3292         err = nl80211_parse_beacon(info->attrs, &params);
3293         if (err)
3294                 return err;
3295
3296         wdev_lock(wdev);
3297         err = rdev_change_beacon(rdev, dev, &params);
3298         wdev_unlock(wdev);
3299
3300         return err;
3301 }
3302
3303 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3304 {
3305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3306         struct net_device *dev = info->user_ptr[1];
3307
3308         return cfg80211_stop_ap(rdev, dev);
3309 }
3310
3311 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3312         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3313         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3314         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3315         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3316         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3317         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3318 };
3319
3320 static int parse_station_flags(struct genl_info *info,
3321                                enum nl80211_iftype iftype,
3322                                struct station_parameters *params)
3323 {
3324         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3325         struct nlattr *nla;
3326         int flag;
3327
3328         /*
3329          * Try parsing the new attribute first so userspace
3330          * can specify both for older kernels.
3331          */
3332         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3333         if (nla) {
3334                 struct nl80211_sta_flag_update *sta_flags;
3335
3336                 sta_flags = nla_data(nla);
3337                 params->sta_flags_mask = sta_flags->mask;
3338                 params->sta_flags_set = sta_flags->set;
3339                 params->sta_flags_set &= params->sta_flags_mask;
3340                 if ((params->sta_flags_mask |
3341                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3342                         return -EINVAL;
3343                 return 0;
3344         }
3345
3346         /* if present, parse the old attribute */
3347
3348         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3349         if (!nla)
3350                 return 0;
3351
3352         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3353                              nla, sta_flags_policy))
3354                 return -EINVAL;
3355
3356         /*
3357          * Only allow certain flags for interface types so that
3358          * other attributes are silently ignored. Remember that
3359          * this is backward compatibility code with old userspace
3360          * and shouldn't be hit in other cases anyway.
3361          */
3362         switch (iftype) {
3363         case NL80211_IFTYPE_AP:
3364         case NL80211_IFTYPE_AP_VLAN:
3365         case NL80211_IFTYPE_P2P_GO:
3366                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3367                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3368                                          BIT(NL80211_STA_FLAG_WME) |
3369                                          BIT(NL80211_STA_FLAG_MFP);
3370                 break;
3371         case NL80211_IFTYPE_P2P_CLIENT:
3372         case NL80211_IFTYPE_STATION:
3373                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3374                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3375                 break;
3376         case NL80211_IFTYPE_MESH_POINT:
3377                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3378                                          BIT(NL80211_STA_FLAG_MFP) |
3379                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3380         default:
3381                 return -EINVAL;
3382         }
3383
3384         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3385                 if (flags[flag]) {
3386                         params->sta_flags_set |= (1<<flag);
3387
3388                         /* no longer support new API additions in old API */
3389                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3390                                 return -EINVAL;
3391                 }
3392         }
3393
3394         return 0;
3395 }
3396
3397 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3398                                  int attr)
3399 {
3400         struct nlattr *rate;
3401         u32 bitrate;
3402         u16 bitrate_compat;
3403
3404         rate = nla_nest_start(msg, attr);
3405         if (!rate)
3406                 return false;
3407
3408         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3409         bitrate = cfg80211_calculate_bitrate(info);
3410         /* report 16-bit bitrate only if we can */
3411         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3412         if (bitrate > 0 &&
3413             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3414                 return false;
3415         if (bitrate_compat > 0 &&
3416             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3417                 return false;
3418
3419         if (info->flags & RATE_INFO_FLAGS_MCS) {
3420                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3421                         return false;
3422                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3423                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3424                         return false;
3425                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3426                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3427                         return false;
3428         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3429                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3430                         return false;
3431                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3432                         return false;
3433                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3434                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3435                         return false;
3436                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3437                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3438                         return false;
3439                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3440                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3441                         return false;
3442                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3443                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3444                         return false;
3445                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3446                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3447                         return false;
3448         }
3449
3450         nla_nest_end(msg, rate);
3451         return true;
3452 }
3453
3454 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3455                                int id)
3456 {
3457         void *attr;
3458         int i = 0;
3459
3460         if (!mask)
3461                 return true;
3462
3463         attr = nla_nest_start(msg, id);
3464         if (!attr)
3465                 return false;
3466
3467         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3468                 if (!(mask & BIT(i)))
3469                         continue;
3470
3471                 if (nla_put_u8(msg, i, signal[i]))
3472                         return false;
3473         }
3474
3475         nla_nest_end(msg, attr);
3476
3477         return true;
3478 }
3479
3480 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3481                                 int flags,
3482                                 struct cfg80211_registered_device *rdev,
3483                                 struct net_device *dev,
3484                                 const u8 *mac_addr, struct station_info *sinfo)
3485 {
3486         void *hdr;
3487         struct nlattr *sinfoattr, *bss_param;
3488
3489         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3490         if (!hdr)
3491                 return -1;
3492
3493         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3494             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3495             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3496                 goto nla_put_failure;
3497
3498         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3499         if (!sinfoattr)
3500                 goto nla_put_failure;
3501         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3502             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3503                         sinfo->connected_time))
3504                 goto nla_put_failure;
3505         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3506             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3507                         sinfo->inactive_time))
3508                 goto nla_put_failure;
3509         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3510                               STATION_INFO_RX_BYTES64)) &&
3511             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3512                         (u32)sinfo->rx_bytes))
3513                 goto nla_put_failure;
3514         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3515                               STATION_INFO_TX_BYTES64)) &&
3516             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3517                         (u32)sinfo->tx_bytes))
3518                 goto nla_put_failure;
3519         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3520             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3521                         sinfo->rx_bytes))
3522                 goto nla_put_failure;
3523         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3524             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3525                         sinfo->tx_bytes))
3526                 goto nla_put_failure;
3527         if ((sinfo->filled & STATION_INFO_LLID) &&
3528             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3529                 goto nla_put_failure;
3530         if ((sinfo->filled & STATION_INFO_PLID) &&
3531             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3532                 goto nla_put_failure;
3533         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3534             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3535                        sinfo->plink_state))
3536                 goto nla_put_failure;
3537         switch (rdev->wiphy.signal_type) {
3538         case CFG80211_SIGNAL_TYPE_MBM:
3539                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3540                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3541                                sinfo->signal))
3542                         goto nla_put_failure;
3543                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3544                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3545                                sinfo->signal_avg))
3546                         goto nla_put_failure;
3547                 break;
3548         default:
3549                 break;
3550         }
3551         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3552                 if (!nl80211_put_signal(msg, sinfo->chains,
3553                                         sinfo->chain_signal,
3554                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3555                         goto nla_put_failure;
3556         }
3557         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3558                 if (!nl80211_put_signal(msg, sinfo->chains,
3559                                         sinfo->chain_signal_avg,
3560                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3561                         goto nla_put_failure;
3562         }
3563         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3564                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3565                                           NL80211_STA_INFO_TX_BITRATE))
3566                         goto nla_put_failure;
3567         }
3568         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3569                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3570                                           NL80211_STA_INFO_RX_BITRATE))
3571                         goto nla_put_failure;
3572         }
3573         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3574             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3575                         sinfo->rx_packets))
3576                 goto nla_put_failure;
3577         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3578             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3579                         sinfo->tx_packets))
3580                 goto nla_put_failure;
3581         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3582             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3583                         sinfo->tx_retries))
3584                 goto nla_put_failure;
3585         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3586             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3587                         sinfo->tx_failed))
3588                 goto nla_put_failure;
3589         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3590             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3591                         sinfo->beacon_loss_count))
3592                 goto nla_put_failure;
3593         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3594             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3595                         sinfo->local_pm))
3596                 goto nla_put_failure;
3597         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3598             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3599                         sinfo->peer_pm))
3600                 goto nla_put_failure;
3601         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3602             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3603                         sinfo->nonpeer_pm))
3604                 goto nla_put_failure;
3605         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3606                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3607                 if (!bss_param)
3608                         goto nla_put_failure;
3609
3610                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3611                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3612                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3613                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3614                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3615                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3616                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3617                                sinfo->bss_param.dtim_period) ||
3618                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3619                                 sinfo->bss_param.beacon_interval))
3620                         goto nla_put_failure;
3621
3622                 nla_nest_end(msg, bss_param);
3623         }
3624         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3625             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3626                     sizeof(struct nl80211_sta_flag_update),
3627                     &sinfo->sta_flags))
3628                 goto nla_put_failure;
3629         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3630                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3631                             sinfo->t_offset))
3632                 goto nla_put_failure;
3633         nla_nest_end(msg, sinfoattr);
3634
3635         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3636             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3637                     sinfo->assoc_req_ies))
3638                 goto nla_put_failure;
3639
3640         return genlmsg_end(msg, hdr);
3641
3642  nla_put_failure:
3643         genlmsg_cancel(msg, hdr);
3644         return -EMSGSIZE;
3645 }
3646
3647 static int nl80211_dump_station(struct sk_buff *skb,
3648                                 struct netlink_callback *cb)
3649 {
3650         struct station_info sinfo;
3651         struct cfg80211_registered_device *dev;
3652         struct wireless_dev *wdev;
3653         u8 mac_addr[ETH_ALEN];
3654         int sta_idx = cb->args[2];
3655         int err;
3656
3657         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3658         if (err)
3659                 return err;
3660
3661         if (!wdev->netdev) {
3662                 err = -EINVAL;
3663                 goto out_err;
3664         }
3665
3666         if (!dev->ops->dump_station) {
3667                 err = -EOPNOTSUPP;
3668                 goto out_err;
3669         }
3670
3671         while (1) {
3672                 memset(&sinfo, 0, sizeof(sinfo));
3673                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3674                                         mac_addr, &sinfo);
3675                 if (err == -ENOENT)
3676                         break;
3677                 if (err)
3678                         goto out_err;
3679
3680                 if (nl80211_send_station(skb,
3681                                 NETLINK_CB(cb->skb).portid,
3682                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3683                                 dev, wdev->netdev, mac_addr,
3684                                 &sinfo) < 0)
3685                         goto out;
3686
3687                 sta_idx++;
3688         }
3689
3690
3691  out:
3692         cb->args[2] = sta_idx;
3693         err = skb->len;
3694  out_err:
3695         nl80211_finish_wdev_dump(dev);
3696
3697         return err;
3698 }
3699
3700 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3701 {
3702         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3703         struct net_device *dev = info->user_ptr[1];
3704         struct station_info sinfo;
3705         struct sk_buff *msg;
3706         u8 *mac_addr = NULL;
3707         int err;
3708
3709         memset(&sinfo, 0, sizeof(sinfo));
3710
3711         if (!info->attrs[NL80211_ATTR_MAC])
3712                 return -EINVAL;
3713
3714         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3715
3716         if (!rdev->ops->get_station)
3717                 return -EOPNOTSUPP;
3718
3719         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3720         if (err)
3721                 return err;
3722
3723         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3724         if (!msg)
3725                 return -ENOMEM;
3726
3727         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3728                                  rdev, dev, mac_addr, &sinfo) < 0) {
3729                 nlmsg_free(msg);
3730                 return -ENOBUFS;
3731         }
3732
3733         return genlmsg_reply(msg, info);
3734 }
3735
3736 int cfg80211_check_station_change(struct wiphy *wiphy,
3737                                   struct station_parameters *params,
3738                                   enum cfg80211_station_type statype)
3739 {
3740         if (params->listen_interval != -1)
3741                 return -EINVAL;
3742         if (params->aid)
3743                 return -EINVAL;
3744
3745         /* When you run into this, adjust the code below for the new flag */
3746         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3747
3748         switch (statype) {
3749         case CFG80211_STA_MESH_PEER_KERNEL:
3750         case CFG80211_STA_MESH_PEER_USER:
3751                 /*
3752                  * No ignoring the TDLS flag here -- the userspace mesh
3753                  * code doesn't have the bug of including TDLS in the
3754                  * mask everywhere.
3755                  */
3756                 if (params->sta_flags_mask &
3757                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3758                                   BIT(NL80211_STA_FLAG_MFP) |
3759                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3760                         return -EINVAL;
3761                 break;
3762         case CFG80211_STA_TDLS_PEER_SETUP:
3763         case CFG80211_STA_TDLS_PEER_ACTIVE:
3764                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3765                         return -EINVAL;
3766                 /* ignore since it can't change */
3767                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3768                 break;
3769         default:
3770                 /* disallow mesh-specific things */
3771                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3772                         return -EINVAL;
3773                 if (params->local_pm)
3774                         return -EINVAL;
3775                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3776                         return -EINVAL;
3777         }
3778
3779         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3780             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3781                 /* TDLS can't be set, ... */
3782                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3783                         return -EINVAL;
3784                 /*
3785                  * ... but don't bother the driver with it. This works around
3786                  * a hostapd/wpa_supplicant issue -- it always includes the
3787                  * TLDS_PEER flag in the mask even for AP mode.
3788                  */
3789                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3790         }
3791
3792         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3793                 /* reject other things that can't change */
3794                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3795                         return -EINVAL;
3796                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3797                         return -EINVAL;
3798                 if (params->supported_rates)
3799                         return -EINVAL;
3800                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3801                         return -EINVAL;
3802         }
3803
3804         if (statype != CFG80211_STA_AP_CLIENT) {
3805                 if (params->vlan)
3806                         return -EINVAL;
3807         }
3808
3809         switch (statype) {
3810         case CFG80211_STA_AP_MLME_CLIENT:
3811                 /* Use this only for authorizing/unauthorizing a station */
3812                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3813                         return -EOPNOTSUPP;
3814                 break;
3815         case CFG80211_STA_AP_CLIENT:
3816                 /* accept only the listed bits */
3817                 if (params->sta_flags_mask &
3818                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3819                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3820                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3821                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3822                                   BIT(NL80211_STA_FLAG_WME) |
3823                                   BIT(NL80211_STA_FLAG_MFP)))
3824                         return -EINVAL;
3825
3826                 /* but authenticated/associated only if driver handles it */
3827                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3828                     params->sta_flags_mask &
3829                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3830                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3831                         return -EINVAL;
3832                 break;
3833         case CFG80211_STA_IBSS:
3834         case CFG80211_STA_AP_STA:
3835                 /* reject any changes other than AUTHORIZED */
3836                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3837                         return -EINVAL;
3838                 break;
3839         case CFG80211_STA_TDLS_PEER_SETUP:
3840                 /* reject any changes other than AUTHORIZED or WME */
3841                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3842                                                BIT(NL80211_STA_FLAG_WME)))
3843                         return -EINVAL;
3844                 /* force (at least) rates when authorizing */
3845                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3846                     !params->supported_rates)
3847                         return -EINVAL;
3848                 break;
3849         case CFG80211_STA_TDLS_PEER_ACTIVE:
3850                 /* reject any changes */
3851                 return -EINVAL;
3852         case CFG80211_STA_MESH_PEER_KERNEL:
3853                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3854                         return -EINVAL;
3855                 break;
3856         case CFG80211_STA_MESH_PEER_USER:
3857                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3858                         return -EINVAL;
3859                 break;
3860         }
3861
3862         return 0;
3863 }
3864 EXPORT_SYMBOL(cfg80211_check_station_change);
3865
3866 /*
3867  * Get vlan interface making sure it is running and on the right wiphy.
3868  */
3869 static struct net_device *get_vlan(struct genl_info *info,
3870                                    struct cfg80211_registered_device *rdev)
3871 {
3872         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3873         struct net_device *v;
3874         int ret;
3875
3876         if (!vlanattr)
3877                 return NULL;
3878
3879         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3880         if (!v)
3881                 return ERR_PTR(-ENODEV);
3882
3883         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3884                 ret = -EINVAL;
3885                 goto error;
3886         }
3887
3888         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3889             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3890             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3891                 ret = -EINVAL;
3892                 goto error;
3893         }
3894
3895         if (!netif_running(v)) {
3896                 ret = -ENETDOWN;
3897                 goto error;
3898         }
3899
3900         return v;
3901  error:
3902         dev_put(v);
3903         return ERR_PTR(ret);
3904 }
3905
3906 static struct nla_policy
3907 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3908         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3909         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3910 };
3911
3912 static int nl80211_parse_sta_wme(struct genl_info *info,
3913                                  struct station_parameters *params)
3914 {
3915         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3916         struct nlattr *nla;
3917         int err;
3918
3919         /* parse WME attributes if present */
3920         if (!info->attrs[NL80211_ATTR_STA_WME])
3921                 return 0;
3922
3923         nla = info->attrs[NL80211_ATTR_STA_WME];
3924         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3925                                nl80211_sta_wme_policy);
3926         if (err)
3927                 return err;
3928
3929         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3930                 params->uapsd_queues = nla_get_u8(
3931                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3932         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3933                 return -EINVAL;
3934
3935         if (tb[NL80211_STA_WME_MAX_SP])
3936                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3937
3938         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3939                 return -EINVAL;
3940
3941         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3942
3943         return 0;
3944 }
3945
3946 static int nl80211_parse_sta_channel_info(struct genl_info *info,
3947                                       struct station_parameters *params)
3948 {
3949         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
3950                 params->supported_channels =
3951                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3952                 params->supported_channels_len =
3953                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3954                 /*
3955                  * Need to include at least one (first channel, number of
3956                  * channels) tuple for each subband, and must have proper
3957                  * tuples for the rest of the data as well.
3958                  */
3959                 if (params->supported_channels_len < 2)
3960                         return -EINVAL;
3961                 if (params->supported_channels_len % 2)
3962                         return -EINVAL;
3963         }
3964
3965         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
3966                 params->supported_oper_classes =
3967                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3968                 params->supported_oper_classes_len =
3969                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3970                 /*
3971                  * The value of the Length field of the Supported Operating
3972                  * Classes element is between 2 and 253.
3973                  */
3974                 if (params->supported_oper_classes_len < 2 ||
3975                     params->supported_oper_classes_len > 253)
3976                         return -EINVAL;
3977         }
3978         return 0;
3979 }
3980
3981 static int nl80211_set_station_tdls(struct genl_info *info,
3982                                     struct station_parameters *params)
3983 {
3984         int err;
3985         /* Dummy STA entry gets updated once the peer capabilities are known */
3986         if (info->attrs[NL80211_ATTR_PEER_AID])
3987                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3988         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3989                 params->ht_capa =
3990                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3991         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3992                 params->vht_capa =
3993                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3994
3995         err = nl80211_parse_sta_channel_info(info, params);
3996         if (err)
3997                 return err;
3998
3999         return nl80211_parse_sta_wme(info, params);
4000 }
4001
4002 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4003 {
4004         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4005         struct net_device *dev = info->user_ptr[1];
4006         struct station_parameters params;
4007         u8 *mac_addr;
4008         int err;
4009
4010         memset(&params, 0, sizeof(params));
4011
4012         params.listen_interval = -1;
4013
4014         if (!rdev->ops->change_station)
4015                 return -EOPNOTSUPP;
4016
4017         if (info->attrs[NL80211_ATTR_STA_AID])
4018                 return -EINVAL;
4019
4020         if (!info->attrs[NL80211_ATTR_MAC])
4021                 return -EINVAL;
4022
4023         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4024
4025         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4026                 params.supported_rates =
4027                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4028                 params.supported_rates_len =
4029                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4030         }
4031
4032         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4033                 params.capability =
4034                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4035                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4036         }
4037
4038         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4039                 params.ext_capab =
4040                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4041                 params.ext_capab_len =
4042                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4043         }
4044
4045         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4046                 return -EINVAL;
4047
4048         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4049                 return -EINVAL;
4050
4051         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4052                 params.plink_action =
4053                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4054                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4055                         return -EINVAL;
4056         }
4057
4058         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4059                 params.plink_state =
4060                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4061                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4062                         return -EINVAL;
4063                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4064         }
4065
4066         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4067                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4068                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4069
4070                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4071                     pm > NL80211_MESH_POWER_MAX)
4072                         return -EINVAL;
4073
4074                 params.local_pm = pm;
4075         }
4076
4077         /* Include parameters for TDLS peer (will check later) */
4078         err = nl80211_set_station_tdls(info, &params);
4079         if (err)
4080                 return err;
4081
4082         params.vlan = get_vlan(info, rdev);
4083         if (IS_ERR(params.vlan))
4084                 return PTR_ERR(params.vlan);
4085
4086         switch (dev->ieee80211_ptr->iftype) {
4087         case NL80211_IFTYPE_AP:
4088         case NL80211_IFTYPE_AP_VLAN:
4089         case NL80211_IFTYPE_P2P_GO:
4090         case NL80211_IFTYPE_P2P_CLIENT:
4091         case NL80211_IFTYPE_STATION:
4092         case NL80211_IFTYPE_ADHOC:
4093         case NL80211_IFTYPE_MESH_POINT:
4094                 break;
4095         default:
4096                 err = -EOPNOTSUPP;
4097                 goto out_put_vlan;
4098         }
4099
4100         /* driver will call cfg80211_check_station_change() */
4101         err = rdev_change_station(rdev, dev, mac_addr, &params);
4102
4103  out_put_vlan:
4104         if (params.vlan)
4105                 dev_put(params.vlan);
4106
4107         return err;
4108 }
4109
4110 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4111 {
4112         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4113         int err;
4114         struct net_device *dev = info->user_ptr[1];
4115         struct station_parameters params;
4116         u8 *mac_addr = NULL;
4117
4118         memset(&params, 0, sizeof(params));
4119
4120         if (!rdev->ops->add_station)
4121                 return -EOPNOTSUPP;
4122
4123         if (!info->attrs[NL80211_ATTR_MAC])
4124                 return -EINVAL;
4125
4126         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4127                 return -EINVAL;
4128
4129         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4130                 return -EINVAL;
4131
4132         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4133             !info->attrs[NL80211_ATTR_PEER_AID])
4134                 return -EINVAL;
4135
4136         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4137         params.supported_rates =
4138                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4139         params.supported_rates_len =
4140                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4141         params.listen_interval =
4142                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4143
4144         if (info->attrs[NL80211_ATTR_PEER_AID])
4145                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4146         else
4147                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4148         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4149                 return -EINVAL;
4150
4151         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4152                 params.capability =
4153                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4154                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4155         }
4156
4157         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4158                 params.ext_capab =
4159                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4160                 params.ext_capab_len =
4161                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4162         }
4163
4164         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4165                 params.ht_capa =
4166                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4167
4168         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4169                 params.vht_capa =
4170                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4171
4172         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4173                 params.opmode_notif_used = true;
4174                 params.opmode_notif =
4175                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4176         }
4177
4178         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4179                 params.plink_action =
4180                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4181                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4182                         return -EINVAL;
4183         }
4184
4185         err = nl80211_parse_sta_channel_info(info, &params);
4186         if (err)
4187                 return err;
4188
4189         err = nl80211_parse_sta_wme(info, &params);
4190         if (err)
4191                 return err;
4192
4193         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4194                 return -EINVAL;
4195
4196         /* When you run into this, adjust the code below for the new flag */
4197         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4198
4199         switch (dev->ieee80211_ptr->iftype) {
4200         case NL80211_IFTYPE_AP:
4201         case NL80211_IFTYPE_AP_VLAN:
4202         case NL80211_IFTYPE_P2P_GO:
4203                 /* ignore WME attributes if iface/sta is not capable */
4204                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4205                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4206                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4207
4208                 /* TDLS peers cannot be added */
4209                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4210                     info->attrs[NL80211_ATTR_PEER_AID])
4211                         return -EINVAL;
4212                 /* but don't bother the driver with it */
4213                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4214
4215                 /* allow authenticated/associated only if driver handles it */
4216                 if (!(rdev->wiphy.features &
4217                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4218                     params.sta_flags_mask &
4219                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4220                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4221                         return -EINVAL;
4222
4223                 /* must be last in here for error handling */
4224                 params.vlan = get_vlan(info, rdev);
4225                 if (IS_ERR(params.vlan))
4226                         return PTR_ERR(params.vlan);
4227                 break;
4228         case NL80211_IFTYPE_MESH_POINT:
4229                 /* ignore uAPSD data */
4230                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4231
4232                 /* associated is disallowed */
4233                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4234                         return -EINVAL;
4235                 /* TDLS peers cannot be added */
4236                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4237                     info->attrs[NL80211_ATTR_PEER_AID])
4238                         return -EINVAL;
4239                 break;
4240         case NL80211_IFTYPE_STATION:
4241         case NL80211_IFTYPE_P2P_CLIENT:
4242                 /* ignore uAPSD data */
4243                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4244
4245                 /* these are disallowed */
4246                 if (params.sta_flags_mask &
4247                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4248                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4249                         return -EINVAL;
4250                 /* Only TDLS peers can be added */
4251                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4252                         return -EINVAL;
4253                 /* Can only add if TDLS ... */
4254                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4255                         return -EOPNOTSUPP;
4256                 /* ... with external setup is supported */
4257                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4258                         return -EOPNOTSUPP;
4259                 /*
4260                  * Older wpa_supplicant versions always mark the TDLS peer
4261                  * as authorized, but it shouldn't yet be.
4262                  */
4263                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4264                 break;
4265         default:
4266                 return -EOPNOTSUPP;
4267         }
4268
4269         /* be aware of params.vlan when changing code here */
4270
4271         err = rdev_add_station(rdev, dev, mac_addr, &params);
4272
4273         if (params.vlan)
4274                 dev_put(params.vlan);
4275         return err;
4276 }
4277
4278 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4279 {
4280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4281         struct net_device *dev = info->user_ptr[1];
4282         u8 *mac_addr = NULL;
4283
4284         if (info->attrs[NL80211_ATTR_MAC])
4285                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4286
4287         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4288             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4289             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4290             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4291                 return -EINVAL;
4292
4293         if (!rdev->ops->del_station)
4294                 return -EOPNOTSUPP;
4295
4296         return rdev_del_station(rdev, dev, mac_addr);
4297 }
4298
4299 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4300                                 int flags, struct net_device *dev,
4301                                 u8 *dst, u8 *next_hop,
4302                                 struct mpath_info *pinfo)
4303 {
4304         void *hdr;
4305         struct nlattr *pinfoattr;
4306
4307         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4308         if (!hdr)
4309                 return -1;
4310
4311         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4312             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4313             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4314             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4315                 goto nla_put_failure;
4316
4317         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4318         if (!pinfoattr)
4319                 goto nla_put_failure;
4320         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4321             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4322                         pinfo->frame_qlen))
4323                 goto nla_put_failure;
4324         if (((pinfo->filled & MPATH_INFO_SN) &&
4325              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4326             ((pinfo->filled & MPATH_INFO_METRIC) &&
4327              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4328                          pinfo->metric)) ||
4329             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4330              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4331                          pinfo->exptime)) ||
4332             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4333              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4334                         pinfo->flags)) ||
4335             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4336              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4337                          pinfo->discovery_timeout)) ||
4338             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4339              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4340                         pinfo->discovery_retries)))
4341                 goto nla_put_failure;
4342
4343         nla_nest_end(msg, pinfoattr);
4344
4345         return genlmsg_end(msg, hdr);
4346
4347  nla_put_failure:
4348         genlmsg_cancel(msg, hdr);
4349         return -EMSGSIZE;
4350 }
4351
4352 static int nl80211_dump_mpath(struct sk_buff *skb,
4353                               struct netlink_callback *cb)
4354 {
4355         struct mpath_info pinfo;
4356         struct cfg80211_registered_device *dev;
4357         struct wireless_dev *wdev;
4358         u8 dst[ETH_ALEN];
4359         u8 next_hop[ETH_ALEN];
4360         int path_idx = cb->args[2];
4361         int err;
4362
4363         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4364         if (err)
4365                 return err;
4366
4367         if (!dev->ops->dump_mpath) {
4368                 err = -EOPNOTSUPP;
4369                 goto out_err;
4370         }
4371
4372         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4373                 err = -EOPNOTSUPP;
4374                 goto out_err;
4375         }
4376
4377         while (1) {
4378                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4379                                       next_hop, &pinfo);
4380                 if (err == -ENOENT)
4381                         break;
4382                 if (err)
4383                         goto out_err;
4384
4385                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4386                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4387                                        wdev->netdev, dst, next_hop,
4388                                        &pinfo) < 0)
4389                         goto out;
4390
4391                 path_idx++;
4392         }
4393
4394
4395  out:
4396         cb->args[2] = path_idx;
4397         err = skb->len;
4398  out_err:
4399         nl80211_finish_wdev_dump(dev);
4400         return err;
4401 }
4402
4403 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4404 {
4405         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4406         int err;
4407         struct net_device *dev = info->user_ptr[1];
4408         struct mpath_info pinfo;
4409         struct sk_buff *msg;
4410         u8 *dst = NULL;
4411         u8 next_hop[ETH_ALEN];
4412
4413         memset(&pinfo, 0, sizeof(pinfo));
4414
4415         if (!info->attrs[NL80211_ATTR_MAC])
4416                 return -EINVAL;
4417
4418         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4419
4420         if (!rdev->ops->get_mpath)
4421                 return -EOPNOTSUPP;
4422
4423         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4424                 return -EOPNOTSUPP;
4425
4426         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4427         if (err)
4428                 return err;
4429
4430         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4431         if (!msg)
4432                 return -ENOMEM;
4433
4434         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4435                                  dev, dst, next_hop, &pinfo) < 0) {
4436                 nlmsg_free(msg);
4437                 return -ENOBUFS;
4438         }
4439
4440         return genlmsg_reply(msg, info);
4441 }
4442
4443 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4444 {
4445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4446         struct net_device *dev = info->user_ptr[1];
4447         u8 *dst = NULL;
4448         u8 *next_hop = NULL;
4449
4450         if (!info->attrs[NL80211_ATTR_MAC])
4451                 return -EINVAL;
4452
4453         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4454                 return -EINVAL;
4455
4456         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4457         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4458
4459         if (!rdev->ops->change_mpath)
4460                 return -EOPNOTSUPP;
4461
4462         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4463                 return -EOPNOTSUPP;
4464
4465         return rdev_change_mpath(rdev, dev, dst, next_hop);
4466 }
4467
4468 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4469 {
4470         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4471         struct net_device *dev = info->user_ptr[1];
4472         u8 *dst = NULL;
4473         u8 *next_hop = NULL;
4474
4475         if (!info->attrs[NL80211_ATTR_MAC])
4476                 return -EINVAL;
4477
4478         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4479                 return -EINVAL;
4480
4481         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4482         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4483
4484         if (!rdev->ops->add_mpath)
4485                 return -EOPNOTSUPP;
4486
4487         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4488                 return -EOPNOTSUPP;
4489
4490         return rdev_add_mpath(rdev, dev, dst, next_hop);
4491 }
4492
4493 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4494 {
4495         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4496         struct net_device *dev = info->user_ptr[1];
4497         u8 *dst = NULL;
4498
4499         if (info->attrs[NL80211_ATTR_MAC])
4500                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4501
4502         if (!rdev->ops->del_mpath)
4503                 return -EOPNOTSUPP;
4504
4505         return rdev_del_mpath(rdev, dev, dst);
4506 }
4507
4508 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4509 {
4510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4511         struct net_device *dev = info->user_ptr[1];
4512         struct wireless_dev *wdev = dev->ieee80211_ptr;
4513         struct bss_parameters params;
4514         int err;
4515
4516         memset(&params, 0, sizeof(params));
4517         /* default to not changing parameters */
4518         params.use_cts_prot = -1;
4519         params.use_short_preamble = -1;
4520         params.use_short_slot_time = -1;
4521         params.ap_isolate = -1;
4522         params.ht_opmode = -1;
4523         params.p2p_ctwindow = -1;
4524         params.p2p_opp_ps = -1;
4525
4526         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4527                 params.use_cts_prot =
4528                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4529         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4530                 params.use_short_preamble =
4531                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4532         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4533                 params.use_short_slot_time =
4534                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4535         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4536                 params.basic_rates =
4537                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4538                 params.basic_rates_len =
4539                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4540         }
4541         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4542                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4543         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4544                 params.ht_opmode =
4545                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4546
4547         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4548                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4549                         return -EINVAL;
4550                 params.p2p_ctwindow =
4551                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4552                 if (params.p2p_ctwindow < 0)
4553                         return -EINVAL;
4554                 if (params.p2p_ctwindow != 0 &&
4555                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4556                         return -EINVAL;
4557         }
4558
4559         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4560                 u8 tmp;
4561
4562                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4563                         return -EINVAL;
4564                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4565                 if (tmp > 1)
4566                         return -EINVAL;
4567                 params.p2p_opp_ps = tmp;
4568                 if (params.p2p_opp_ps &&
4569                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4570                         return -EINVAL;
4571         }
4572
4573         if (!rdev->ops->change_bss)
4574                 return -EOPNOTSUPP;
4575
4576         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4577             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4578                 return -EOPNOTSUPP;
4579
4580         wdev_lock(wdev);
4581         err = rdev_change_bss(rdev, dev, &params);
4582         wdev_unlock(wdev);
4583
4584         return err;
4585 }
4586
4587 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4588         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4589         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4590         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4591         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4592         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4593         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4594 };
4595
4596 static int parse_reg_rule(struct nlattr *tb[],
4597         struct ieee80211_reg_rule *reg_rule)
4598 {
4599         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4600         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4601
4602         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4603                 return -EINVAL;
4604         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4605                 return -EINVAL;
4606         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4607                 return -EINVAL;
4608         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4609                 return -EINVAL;
4610         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4611                 return -EINVAL;
4612
4613         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4614
4615         freq_range->start_freq_khz =
4616                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4617         freq_range->end_freq_khz =
4618                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4619         freq_range->max_bandwidth_khz =
4620                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4621
4622         power_rule->max_eirp =
4623                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4624
4625         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4626                 power_rule->max_antenna_gain =
4627                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4628
4629         return 0;
4630 }
4631
4632 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4633 {
4634         int r;
4635         char *data = NULL;
4636         enum nl80211_user_reg_hint_type user_reg_hint_type;
4637
4638         /*
4639          * You should only get this when cfg80211 hasn't yet initialized
4640          * completely when built-in to the kernel right between the time
4641          * window between nl80211_init() and regulatory_init(), if that is
4642          * even possible.
4643          */
4644         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4645                 return -EINPROGRESS;
4646
4647         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4648                 return -EINVAL;
4649
4650         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4651
4652         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4653                 user_reg_hint_type =
4654                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4655         else
4656                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4657
4658         switch (user_reg_hint_type) {
4659         case NL80211_USER_REG_HINT_USER:
4660         case NL80211_USER_REG_HINT_CELL_BASE:
4661                 break;
4662         default:
4663                 return -EINVAL;
4664         }
4665
4666         r = regulatory_hint_user(data, user_reg_hint_type);
4667
4668         return r;
4669 }
4670
4671 static int nl80211_get_mesh_config(struct sk_buff *skb,
4672                                    struct genl_info *info)
4673 {
4674         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4675         struct net_device *dev = info->user_ptr[1];
4676         struct wireless_dev *wdev = dev->ieee80211_ptr;
4677         struct mesh_config cur_params;
4678         int err = 0;
4679         void *hdr;
4680         struct nlattr *pinfoattr;
4681         struct sk_buff *msg;
4682
4683         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4684                 return -EOPNOTSUPP;
4685
4686         if (!rdev->ops->get_mesh_config)
4687                 return -EOPNOTSUPP;
4688
4689         wdev_lock(wdev);
4690         /* If not connected, get default parameters */
4691         if (!wdev->mesh_id_len)
4692                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4693         else
4694                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4695         wdev_unlock(wdev);
4696
4697         if (err)
4698                 return err;
4699
4700         /* Draw up a netlink message to send back */
4701         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4702         if (!msg)
4703                 return -ENOMEM;
4704         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4705                              NL80211_CMD_GET_MESH_CONFIG);
4706         if (!hdr)
4707                 goto out;
4708         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4709         if (!pinfoattr)
4710                 goto nla_put_failure;
4711         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4712             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4713                         cur_params.dot11MeshRetryTimeout) ||
4714             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4715                         cur_params.dot11MeshConfirmTimeout) ||
4716             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4717                         cur_params.dot11MeshHoldingTimeout) ||
4718             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4719                         cur_params.dot11MeshMaxPeerLinks) ||
4720             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4721                        cur_params.dot11MeshMaxRetries) ||
4722             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4723                        cur_params.dot11MeshTTL) ||
4724             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4725                        cur_params.element_ttl) ||
4726             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4727                        cur_params.auto_open_plinks) ||
4728             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4729                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4730             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4731                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4732             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4733                         cur_params.path_refresh_time) ||
4734             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4735                         cur_params.min_discovery_timeout) ||
4736             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4737                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4738             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4739                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4740             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4741                         cur_params.dot11MeshHWMPperrMinInterval) ||
4742             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4743                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4744             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4745                        cur_params.dot11MeshHWMPRootMode) ||
4746             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4747                         cur_params.dot11MeshHWMPRannInterval) ||
4748             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4749                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4750             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4751                        cur_params.dot11MeshForwarding) ||
4752             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4753                         cur_params.rssi_threshold) ||
4754             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4755                         cur_params.ht_opmode) ||
4756             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4757                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4758             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4759                         cur_params.dot11MeshHWMProotInterval) ||
4760             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4761                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4762             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4763                         cur_params.power_mode) ||
4764             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4765                         cur_params.dot11MeshAwakeWindowDuration) ||
4766             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4767                         cur_params.plink_timeout))
4768                 goto nla_put_failure;
4769         nla_nest_end(msg, pinfoattr);
4770         genlmsg_end(msg, hdr);
4771         return genlmsg_reply(msg, info);
4772
4773  nla_put_failure:
4774         genlmsg_cancel(msg, hdr);
4775  out:
4776         nlmsg_free(msg);
4777         return -ENOBUFS;
4778 }
4779
4780 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4781         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4782         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4783         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4784         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4785         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4786         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4787         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4788         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4789         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4790         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4791         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4792         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4793         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4794         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4795         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4796         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4797         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4798         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4799         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4800         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4801         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4802         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4803         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4804         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4805         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4806         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4807         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4808         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4809 };
4810
4811 static const struct nla_policy
4812         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4813         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4814         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4815         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4816         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4817         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4818         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4819         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4820                                     .len = IEEE80211_MAX_DATA_LEN },
4821         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4822 };
4823
4824 static int nl80211_parse_mesh_config(struct genl_info *info,
4825                                      struct mesh_config *cfg,
4826                                      u32 *mask_out)
4827 {
4828         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4829         u32 mask = 0;
4830
4831 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4832 do {                                                                        \
4833         if (tb[attr]) {                                                     \
4834                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4835                         return -EINVAL;                                     \
4836                 cfg->param = fn(tb[attr]);                                  \
4837                 mask |= (1 << (attr - 1));                                  \
4838         }                                                                   \
4839 } while (0)
4840
4841
4842         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4843                 return -EINVAL;
4844         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4845                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4846                              nl80211_meshconf_params_policy))
4847                 return -EINVAL;
4848
4849         /* This makes sure that there aren't more than 32 mesh config
4850          * parameters (otherwise our bitfield scheme would not work.) */
4851         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4852
4853         /* Fill in the params struct */
4854         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4855                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4856                                   nla_get_u16);
4857         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4858                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4859                                   nla_get_u16);
4860         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4861                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4862                                   nla_get_u16);
4863         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4864                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4865                                   nla_get_u16);
4866         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4867                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4868                                   nla_get_u8);
4869         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4870                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4871         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4872                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4873                                   nla_get_u8);
4874         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4875                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4876                                   nla_get_u8);
4877         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4878                                   1, 255, mask,
4879                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4880                                   nla_get_u32);
4881         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4882                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4883                                   nla_get_u8);
4884         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4885                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4886                                   nla_get_u32);
4887         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4888                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4889                                   nla_get_u16);
4890         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4891                                   1, 65535, mask,
4892                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4893                                   nla_get_u32);
4894         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4895                                   1, 65535, mask,
4896                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4897                                   nla_get_u16);
4898         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4899                                   1, 65535, mask,
4900                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4901                                   nla_get_u16);
4902         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4903                                   dot11MeshHWMPnetDiameterTraversalTime,
4904                                   1, 65535, mask,
4905                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4906                                   nla_get_u16);
4907         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4908                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4909                                   nla_get_u8);
4910         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4911                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4912                                   nla_get_u16);
4913         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4914                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4915                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4916                                   nla_get_u8);
4917         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4918                                   mask, NL80211_MESHCONF_FORWARDING,
4919                                   nla_get_u8);
4920         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4921                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4922                                   nla_get_s32);
4923         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4924                                   mask, NL80211_MESHCONF_HT_OPMODE,
4925                                   nla_get_u16);
4926         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4927                                   1, 65535, mask,
4928                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4929                                   nla_get_u32);
4930         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4931                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4932                                   nla_get_u16);
4933         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4934                                   dot11MeshHWMPconfirmationInterval,
4935                                   1, 65535, mask,
4936                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4937                                   nla_get_u16);
4938         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4939                                   NL80211_MESH_POWER_ACTIVE,
4940                                   NL80211_MESH_POWER_MAX,
4941                                   mask, NL80211_MESHCONF_POWER_MODE,
4942                                   nla_get_u32);
4943         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4944                                   0, 65535, mask,
4945                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4946         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4947                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4948                                   nla_get_u32);
4949         if (mask_out)
4950                 *mask_out = mask;
4951
4952         return 0;
4953
4954 #undef FILL_IN_MESH_PARAM_IF_SET
4955 }
4956
4957 static int nl80211_parse_mesh_setup(struct genl_info *info,
4958                                      struct mesh_setup *setup)
4959 {
4960         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4961         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4962
4963         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4964                 return -EINVAL;
4965         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4966                              info->attrs[NL80211_ATTR_MESH_SETUP],
4967                              nl80211_mesh_setup_params_policy))
4968                 return -EINVAL;
4969
4970         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4971                 setup->sync_method =
4972                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4973                  IEEE80211_SYNC_METHOD_VENDOR :
4974                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4975
4976         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4977                 setup->path_sel_proto =
4978                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4979                  IEEE80211_PATH_PROTOCOL_VENDOR :
4980                  IEEE80211_PATH_PROTOCOL_HWMP;
4981
4982         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4983                 setup->path_metric =
4984                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4985                  IEEE80211_PATH_METRIC_VENDOR :
4986                  IEEE80211_PATH_METRIC_AIRTIME;
4987
4988
4989         if (tb[NL80211_MESH_SETUP_IE]) {
4990                 struct nlattr *ieattr =
4991                         tb[NL80211_MESH_SETUP_IE];
4992                 if (!is_valid_ie_attr(ieattr))
4993                         return -EINVAL;
4994                 setup->ie = nla_data(ieattr);
4995                 setup->ie_len = nla_len(ieattr);
4996         }
4997         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4998             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4999                 return -EINVAL;
5000         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5001         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5002         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5003         if (setup->is_secure)
5004                 setup->user_mpm = true;
5005
5006         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5007                 if (!setup->user_mpm)
5008                         return -EINVAL;
5009                 setup->auth_id =
5010                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5011         }
5012
5013         return 0;
5014 }
5015
5016 static int nl80211_update_mesh_config(struct sk_buff *skb,
5017                                       struct genl_info *info)
5018 {
5019         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5020         struct net_device *dev = info->user_ptr[1];
5021         struct wireless_dev *wdev = dev->ieee80211_ptr;
5022         struct mesh_config cfg;
5023         u32 mask;
5024         int err;
5025
5026         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5027                 return -EOPNOTSUPP;
5028
5029         if (!rdev->ops->update_mesh_config)
5030                 return -EOPNOTSUPP;
5031
5032         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5033         if (err)
5034                 return err;
5035
5036         wdev_lock(wdev);
5037         if (!wdev->mesh_id_len)
5038                 err = -ENOLINK;
5039
5040         if (!err)
5041                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5042
5043         wdev_unlock(wdev);
5044
5045         return err;
5046 }
5047
5048 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5049 {
5050         const struct ieee80211_regdomain *regdom;
5051         struct sk_buff *msg;
5052         void *hdr = NULL;
5053         struct nlattr *nl_reg_rules;
5054         unsigned int i;
5055
5056         if (!cfg80211_regdomain)
5057                 return -EINVAL;
5058
5059         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5060         if (!msg)
5061                 return -ENOBUFS;
5062
5063         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5064                              NL80211_CMD_GET_REG);
5065         if (!hdr)
5066                 goto put_failure;
5067
5068         if (reg_last_request_cell_base() &&
5069             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5070                         NL80211_USER_REG_HINT_CELL_BASE))
5071                 goto nla_put_failure;
5072
5073         rcu_read_lock();
5074         regdom = rcu_dereference(cfg80211_regdomain);
5075
5076         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5077             (regdom->dfs_region &&
5078              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5079                 goto nla_put_failure_rcu;
5080
5081         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5082         if (!nl_reg_rules)
5083                 goto nla_put_failure_rcu;
5084
5085         for (i = 0; i < regdom->n_reg_rules; i++) {
5086                 struct nlattr *nl_reg_rule;
5087                 const struct ieee80211_reg_rule *reg_rule;
5088                 const struct ieee80211_freq_range *freq_range;
5089                 const struct ieee80211_power_rule *power_rule;
5090
5091                 reg_rule = &regdom->reg_rules[i];
5092                 freq_range = &reg_rule->freq_range;
5093                 power_rule = &reg_rule->power_rule;
5094
5095                 nl_reg_rule = nla_nest_start(msg, i);
5096                 if (!nl_reg_rule)
5097                         goto nla_put_failure_rcu;
5098
5099                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5100                                 reg_rule->flags) ||
5101                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5102                                 freq_range->start_freq_khz) ||
5103                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5104                                 freq_range->end_freq_khz) ||
5105                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5106                                 freq_range->max_bandwidth_khz) ||
5107                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5108                                 power_rule->max_antenna_gain) ||
5109                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5110                                 power_rule->max_eirp))
5111                         goto nla_put_failure_rcu;
5112
5113                 nla_nest_end(msg, nl_reg_rule);
5114         }
5115         rcu_read_unlock();
5116
5117         nla_nest_end(msg, nl_reg_rules);
5118
5119         genlmsg_end(msg, hdr);
5120         return genlmsg_reply(msg, info);
5121
5122 nla_put_failure_rcu:
5123         rcu_read_unlock();
5124 nla_put_failure:
5125         genlmsg_cancel(msg, hdr);
5126 put_failure:
5127         nlmsg_free(msg);
5128         return -EMSGSIZE;
5129 }
5130
5131 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5132 {
5133         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5134         struct nlattr *nl_reg_rule;
5135         char *alpha2 = NULL;
5136         int rem_reg_rules = 0, r = 0;
5137         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5138         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5139         struct ieee80211_regdomain *rd = NULL;
5140
5141         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5142                 return -EINVAL;
5143
5144         if (!info->attrs[NL80211_ATTR_REG_RULES])
5145                 return -EINVAL;
5146
5147         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5148
5149         if (info->attrs[NL80211_ATTR_DFS_REGION])
5150                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5151
5152         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5153                             rem_reg_rules) {
5154                 num_rules++;
5155                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5156                         return -EINVAL;
5157         }
5158
5159         if (!reg_is_valid_request(alpha2))
5160                 return -EINVAL;
5161
5162         size_of_regd = sizeof(struct ieee80211_regdomain) +
5163                        num_rules * sizeof(struct ieee80211_reg_rule);
5164
5165         rd = kzalloc(size_of_regd, GFP_KERNEL);
5166         if (!rd)
5167                 return -ENOMEM;
5168
5169         rd->n_reg_rules = num_rules;
5170         rd->alpha2[0] = alpha2[0];
5171         rd->alpha2[1] = alpha2[1];
5172
5173         /*
5174          * Disable DFS master mode if the DFS region was
5175          * not supported or known on this kernel.
5176          */
5177         if (reg_supported_dfs_region(dfs_region))
5178                 rd->dfs_region = dfs_region;
5179
5180         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5181                             rem_reg_rules) {
5182                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5183                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5184                           reg_rule_policy);
5185                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5186                 if (r)
5187                         goto bad_reg;
5188
5189                 rule_idx++;
5190
5191                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5192                         r = -EINVAL;
5193                         goto bad_reg;
5194                 }
5195         }
5196
5197         r = set_regdom(rd);
5198         /* set_regdom took ownership */
5199         rd = NULL;
5200
5201  bad_reg:
5202         kfree(rd);
5203         return r;
5204 }
5205
5206 static int validate_scan_freqs(struct nlattr *freqs)
5207 {
5208         struct nlattr *attr1, *attr2;
5209         int n_channels = 0, tmp1, tmp2;
5210
5211         nla_for_each_nested(attr1, freqs, tmp1) {
5212                 n_channels++;
5213                 /*
5214                  * Some hardware has a limited channel list for
5215                  * scanning, and it is pretty much nonsensical
5216                  * to scan for a channel twice, so disallow that
5217                  * and don't require drivers to check that the
5218                  * channel list they get isn't longer than what
5219                  * they can scan, as long as they can scan all
5220                  * the channels they registered at once.
5221                  */
5222                 nla_for_each_nested(attr2, freqs, tmp2)
5223                         if (attr1 != attr2 &&
5224                             nla_get_u32(attr1) == nla_get_u32(attr2))
5225                                 return 0;
5226         }
5227
5228         return n_channels;
5229 }
5230
5231 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5232 {
5233         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5234         struct wireless_dev *wdev = info->user_ptr[1];
5235         struct cfg80211_scan_request *request;
5236         struct nlattr *attr;
5237         struct wiphy *wiphy;
5238         int err, tmp, n_ssids = 0, n_channels, i;
5239         size_t ie_len;
5240
5241         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5242                 return -EINVAL;
5243
5244         wiphy = &rdev->wiphy;
5245
5246         if (!rdev->ops->scan)
5247                 return -EOPNOTSUPP;
5248
5249         if (rdev->scan_req) {
5250                 err = -EBUSY;
5251                 goto unlock;
5252         }
5253
5254         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5255                 n_channels = validate_scan_freqs(
5256                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5257                 if (!n_channels) {
5258                         err = -EINVAL;
5259                         goto unlock;
5260                 }
5261         } else {
5262                 enum ieee80211_band band;
5263                 n_channels = 0;
5264
5265                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5266                         if (wiphy->bands[band])
5267                                 n_channels += wiphy->bands[band]->n_channels;
5268         }
5269
5270         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5271                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5272                         n_ssids++;
5273
5274         if (n_ssids > wiphy->max_scan_ssids) {
5275                 err = -EINVAL;
5276                 goto unlock;
5277         }
5278
5279         if (info->attrs[NL80211_ATTR_IE])
5280                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5281         else
5282                 ie_len = 0;
5283
5284         if (ie_len > wiphy->max_scan_ie_len) {
5285                 err = -EINVAL;
5286                 goto unlock;
5287         }
5288
5289         request = kzalloc(sizeof(*request)
5290                         + sizeof(*request->ssids) * n_ssids
5291                         + sizeof(*request->channels) * n_channels
5292                         + ie_len, GFP_KERNEL);
5293         if (!request) {
5294                 err = -ENOMEM;
5295                 goto unlock;
5296         }
5297
5298         if (n_ssids)
5299                 request->ssids = (void *)&request->channels[n_channels];
5300         request->n_ssids = n_ssids;
5301         if (ie_len) {
5302                 if (request->ssids)
5303                         request->ie = (void *)(request->ssids + n_ssids);
5304                 else
5305                         request->ie = (void *)(request->channels + n_channels);
5306         }
5307
5308         i = 0;
5309         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5310                 /* user specified, bail out if channel not found */
5311                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5312                         struct ieee80211_channel *chan;
5313
5314                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5315
5316                         if (!chan) {
5317                                 err = -EINVAL;
5318                                 goto out_free;
5319                         }
5320
5321                         /* ignore disabled channels */
5322                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5323                                 continue;
5324
5325                         request->channels[i] = chan;
5326                         i++;
5327                 }
5328         } else {
5329                 enum ieee80211_band band;
5330
5331                 /* all channels */
5332                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5333                         int j;
5334                         if (!wiphy->bands[band])
5335                                 continue;
5336                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5337                                 struct ieee80211_channel *chan;
5338
5339                                 chan = &wiphy->bands[band]->channels[j];
5340
5341                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5342                                         continue;
5343
5344                                 request->channels[i] = chan;
5345                                 i++;
5346                         }
5347                 }
5348         }
5349
5350         if (!i) {
5351                 err = -EINVAL;
5352                 goto out_free;
5353         }
5354
5355         request->n_channels = i;
5356
5357         i = 0;
5358         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5359                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5360                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5361                                 err = -EINVAL;
5362                                 goto out_free;
5363                         }
5364                         request->ssids[i].ssid_len = nla_len(attr);
5365                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5366                         i++;
5367                 }
5368         }
5369
5370         if (info->attrs[NL80211_ATTR_IE]) {
5371                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5372                 memcpy((void *)request->ie,
5373                        nla_data(info->attrs[NL80211_ATTR_IE]),
5374                        request->ie_len);
5375         }
5376
5377         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5378                 if (wiphy->bands[i])
5379                         request->rates[i] =
5380                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5381
5382         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5383                 nla_for_each_nested(attr,
5384                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5385                                     tmp) {
5386                         enum ieee80211_band band = nla_type(attr);
5387
5388                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5389                                 err = -EINVAL;
5390                                 goto out_free;
5391                         }
5392
5393                         if (!wiphy->bands[band])
5394                                 continue;
5395
5396                         err = ieee80211_get_ratemask(wiphy->bands[band],
5397                                                      nla_data(attr),
5398                                                      nla_len(attr),
5399                                                      &request->rates[band]);
5400                         if (err)
5401                                 goto out_free;
5402                 }
5403         }
5404
5405         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5406                 request->flags = nla_get_u32(
5407                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5408                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5409                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5410                         err = -EOPNOTSUPP;
5411                         goto out_free;
5412                 }
5413         }
5414
5415         request->no_cck =
5416                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5417
5418         request->wdev = wdev;
5419         request->wiphy = &rdev->wiphy;
5420         request->scan_start = jiffies;
5421
5422         rdev->scan_req = request;
5423         err = rdev_scan(rdev, request);
5424
5425         if (!err) {
5426                 nl80211_send_scan_start(rdev, wdev);
5427                 if (wdev->netdev)
5428                         dev_hold(wdev->netdev);
5429         } else {
5430  out_free:
5431                 rdev->scan_req = NULL;
5432                 kfree(request);
5433         }
5434
5435  unlock:
5436         return err;
5437 }
5438
5439 static int nl80211_start_sched_scan(struct sk_buff *skb,
5440                                     struct genl_info *info)
5441 {
5442         struct cfg80211_sched_scan_request *request;
5443         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5444         struct net_device *dev = info->user_ptr[1];
5445         struct nlattr *attr;
5446         struct wiphy *wiphy;
5447         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5448         u32 interval;
5449         enum ieee80211_band band;
5450         size_t ie_len;
5451         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5452
5453         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5454             !rdev->ops->sched_scan_start)
5455                 return -EOPNOTSUPP;
5456
5457         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5458                 return -EINVAL;
5459
5460         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5461                 return -EINVAL;
5462
5463         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5464         if (interval == 0)
5465                 return -EINVAL;
5466
5467         wiphy = &rdev->wiphy;
5468
5469         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5470                 n_channels = validate_scan_freqs(
5471                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5472                 if (!n_channels)
5473                         return -EINVAL;
5474         } else {
5475                 n_channels = 0;
5476
5477                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5478                         if (wiphy->bands[band])
5479                                 n_channels += wiphy->bands[band]->n_channels;
5480         }
5481
5482         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5483                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5484                                     tmp)
5485                         n_ssids++;
5486
5487         if (n_ssids > wiphy->max_sched_scan_ssids)
5488                 return -EINVAL;
5489
5490         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5491                 nla_for_each_nested(attr,
5492                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5493                                     tmp)
5494                         n_match_sets++;
5495
5496         if (n_match_sets > wiphy->max_match_sets)
5497                 return -EINVAL;
5498
5499         if (info->attrs[NL80211_ATTR_IE])
5500                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5501         else
5502                 ie_len = 0;
5503
5504         if (ie_len > wiphy->max_sched_scan_ie_len)
5505                 return -EINVAL;
5506
5507         if (rdev->sched_scan_req) {
5508                 err = -EINPROGRESS;
5509                 goto out;
5510         }
5511
5512         request = kzalloc(sizeof(*request)
5513                         + sizeof(*request->ssids) * n_ssids
5514                         + sizeof(*request->match_sets) * n_match_sets
5515                         + sizeof(*request->channels) * n_channels
5516                         + ie_len, GFP_KERNEL);
5517         if (!request) {
5518                 err = -ENOMEM;
5519                 goto out;
5520         }
5521
5522         if (n_ssids)
5523                 request->ssids = (void *)&request->channels[n_channels];
5524         request->n_ssids = n_ssids;
5525         if (ie_len) {
5526                 if (request->ssids)
5527                         request->ie = (void *)(request->ssids + n_ssids);
5528                 else
5529                         request->ie = (void *)(request->channels + n_channels);
5530         }
5531
5532         if (n_match_sets) {
5533                 if (request->ie)
5534                         request->match_sets = (void *)(request->ie + ie_len);
5535                 else if (request->ssids)
5536                         request->match_sets =
5537                                 (void *)(request->ssids + n_ssids);
5538                 else
5539                         request->match_sets =
5540                                 (void *)(request->channels + n_channels);
5541         }
5542         request->n_match_sets = n_match_sets;
5543
5544         i = 0;
5545         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5546                 /* user specified, bail out if channel not found */
5547                 nla_for_each_nested(attr,
5548                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5549                                     tmp) {
5550                         struct ieee80211_channel *chan;
5551
5552                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5553
5554                         if (!chan) {
5555                                 err = -EINVAL;
5556                                 goto out_free;
5557                         }
5558
5559                         /* ignore disabled channels */
5560                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5561                                 continue;
5562
5563                         request->channels[i] = chan;
5564                         i++;
5565                 }
5566         } else {
5567                 /* all channels */
5568                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5569                         int j;
5570                         if (!wiphy->bands[band])
5571                                 continue;
5572                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5573                                 struct ieee80211_channel *chan;
5574
5575                                 chan = &wiphy->bands[band]->channels[j];
5576
5577                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5578                                         continue;
5579
5580                                 request->channels[i] = chan;
5581                                 i++;
5582                         }
5583                 }
5584         }
5585
5586         if (!i) {
5587                 err = -EINVAL;
5588                 goto out_free;
5589         }
5590
5591         request->n_channels = i;
5592
5593         i = 0;
5594         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5595                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5596                                     tmp) {
5597                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5598                                 err = -EINVAL;
5599                                 goto out_free;
5600                         }
5601                         request->ssids[i].ssid_len = nla_len(attr);
5602                         memcpy(request->ssids[i].ssid, nla_data(attr),
5603                                nla_len(attr));
5604                         i++;
5605                 }
5606         }
5607
5608         i = 0;
5609         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5610                 nla_for_each_nested(attr,
5611                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5612                                     tmp) {
5613                         struct nlattr *ssid, *rssi;
5614
5615                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5616                                   nla_data(attr), nla_len(attr),
5617                                   nl80211_match_policy);
5618                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5619                         if (ssid) {
5620                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5621                                         err = -EINVAL;
5622                                         goto out_free;
5623                                 }
5624                                 memcpy(request->match_sets[i].ssid.ssid,
5625                                        nla_data(ssid), nla_len(ssid));
5626                                 request->match_sets[i].ssid.ssid_len =
5627                                         nla_len(ssid);
5628                         }
5629                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5630                         if (rssi)
5631                                 request->rssi_thold = nla_get_u32(rssi);
5632                         else
5633                                 request->rssi_thold =
5634                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5635                         i++;
5636                 }
5637         }
5638
5639         if (info->attrs[NL80211_ATTR_IE]) {
5640                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5641                 memcpy((void *)request->ie,
5642                        nla_data(info->attrs[NL80211_ATTR_IE]),
5643                        request->ie_len);
5644         }
5645
5646         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5647                 request->flags = nla_get_u32(
5648                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5649                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5650                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5651                         err = -EOPNOTSUPP;
5652                         goto out_free;
5653                 }
5654         }
5655
5656         request->dev = dev;
5657         request->wiphy = &rdev->wiphy;
5658         request->interval = interval;
5659         request->scan_start = jiffies;
5660
5661         err = rdev_sched_scan_start(rdev, dev, request);
5662         if (!err) {
5663                 rdev->sched_scan_req = request;
5664                 nl80211_send_sched_scan(rdev, dev,
5665                                         NL80211_CMD_START_SCHED_SCAN);
5666                 goto out;
5667         }
5668
5669 out_free:
5670         kfree(request);
5671 out:
5672         return err;
5673 }
5674
5675 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5676                                    struct genl_info *info)
5677 {
5678         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5679
5680         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5681             !rdev->ops->sched_scan_stop)
5682                 return -EOPNOTSUPP;
5683
5684         return __cfg80211_stop_sched_scan(rdev, false);
5685 }
5686
5687 static int nl80211_start_radar_detection(struct sk_buff *skb,
5688                                          struct genl_info *info)
5689 {
5690         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5691         struct net_device *dev = info->user_ptr[1];
5692         struct wireless_dev *wdev = dev->ieee80211_ptr;
5693         struct cfg80211_chan_def chandef;
5694         enum nl80211_dfs_regions dfs_region;
5695         int err;
5696
5697         dfs_region = reg_get_dfs_region(wdev->wiphy);
5698         if (dfs_region == NL80211_DFS_UNSET)
5699                 return -EINVAL;
5700
5701         err = nl80211_parse_chandef(rdev, info, &chandef);
5702         if (err)
5703                 return err;
5704
5705         if (netif_carrier_ok(dev))
5706                 return -EBUSY;
5707
5708         if (wdev->cac_started)
5709                 return -EBUSY;
5710
5711         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5712         if (err < 0)
5713                 return err;
5714
5715         if (err == 0)
5716                 return -EINVAL;
5717
5718         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
5719                 return -EINVAL;
5720
5721         if (!rdev->ops->start_radar_detection)
5722                 return -EOPNOTSUPP;
5723
5724         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5725                                            chandef.chan, CHAN_MODE_SHARED,
5726                                            BIT(chandef.width));
5727         if (err)
5728                 return err;
5729
5730         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5731         if (!err) {
5732                 wdev->channel = chandef.chan;
5733                 wdev->cac_started = true;
5734                 wdev->cac_start_time = jiffies;
5735         }
5736         return err;
5737 }
5738
5739 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5740 {
5741         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5742         struct net_device *dev = info->user_ptr[1];
5743         struct wireless_dev *wdev = dev->ieee80211_ptr;
5744         struct cfg80211_csa_settings params;
5745         /* csa_attrs is defined static to avoid waste of stack size - this
5746          * function is called under RTNL lock, so this should not be a problem.
5747          */
5748         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5749         u8 radar_detect_width = 0;
5750         int err;
5751         bool need_new_beacon = false;
5752
5753         if (!rdev->ops->channel_switch ||
5754             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5755                 return -EOPNOTSUPP;
5756
5757         switch (dev->ieee80211_ptr->iftype) {
5758         case NL80211_IFTYPE_AP:
5759         case NL80211_IFTYPE_P2P_GO:
5760                 need_new_beacon = true;
5761
5762                 /* useless if AP is not running */
5763                 if (!wdev->beacon_interval)
5764                         return -EINVAL;
5765                 break;
5766         case NL80211_IFTYPE_ADHOC:
5767         case NL80211_IFTYPE_MESH_POINT:
5768                 break;
5769         default:
5770                 return -EOPNOTSUPP;
5771         }
5772
5773         memset(&params, 0, sizeof(params));
5774
5775         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5776             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5777                 return -EINVAL;
5778
5779         /* only important for AP, IBSS and mesh create IEs internally */
5780         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
5781                 return -EINVAL;
5782
5783         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5784
5785         if (!need_new_beacon)
5786                 goto skip_beacons;
5787
5788         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5789         if (err)
5790                 return err;
5791
5792         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5793                                info->attrs[NL80211_ATTR_CSA_IES],
5794                                nl80211_policy);
5795         if (err)
5796                 return err;
5797
5798         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5799         if (err)
5800                 return err;
5801
5802         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5803                 return -EINVAL;
5804
5805         params.counter_offset_beacon =
5806                 nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5807         if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
5808                 return -EINVAL;
5809
5810         /* sanity check - counters should be the same */
5811         if (params.beacon_csa.tail[params.counter_offset_beacon] !=
5812             params.count)
5813                 return -EINVAL;
5814
5815         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5816                 params.counter_offset_presp =
5817                         nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5818                 if (params.counter_offset_presp >=
5819                     params.beacon_csa.probe_resp_len)
5820                         return -EINVAL;
5821
5822                 if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
5823                     params.count)
5824                         return -EINVAL;
5825         }
5826
5827 skip_beacons:
5828         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5829         if (err)
5830                 return err;
5831
5832         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
5833                 return -EINVAL;
5834
5835         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
5836             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO ||
5837             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC) {
5838                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
5839                                                     &params.chandef);
5840                 if (err < 0) {
5841                         return err;
5842                 } else if (err) {
5843                         radar_detect_width = BIT(params.chandef.width);
5844                         params.radar_required = true;
5845                 }
5846         }
5847
5848         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5849                                            params.chandef.chan,
5850                                            CHAN_MODE_SHARED,
5851                                            radar_detect_width);
5852         if (err)
5853                 return err;
5854
5855         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
5856                 params.block_tx = true;
5857
5858         wdev_lock(wdev);
5859         err = rdev_channel_switch(rdev, dev, &params);
5860         wdev_unlock(wdev);
5861
5862         return err;
5863 }
5864
5865 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5866                             u32 seq, int flags,
5867                             struct cfg80211_registered_device *rdev,
5868                             struct wireless_dev *wdev,
5869                             struct cfg80211_internal_bss *intbss)
5870 {
5871         struct cfg80211_bss *res = &intbss->pub;
5872         const struct cfg80211_bss_ies *ies;
5873         void *hdr;
5874         struct nlattr *bss;
5875         bool tsf = false;
5876
5877         ASSERT_WDEV_LOCK(wdev);
5878
5879         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5880                              NL80211_CMD_NEW_SCAN_RESULTS);
5881         if (!hdr)
5882                 return -1;
5883
5884         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5885
5886         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5887                 goto nla_put_failure;
5888         if (wdev->netdev &&
5889             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5890                 goto nla_put_failure;
5891         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5892                 goto nla_put_failure;
5893
5894         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5895         if (!bss)
5896                 goto nla_put_failure;
5897         if ((!is_zero_ether_addr(res->bssid) &&
5898              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5899                 goto nla_put_failure;
5900
5901         rcu_read_lock();
5902         ies = rcu_dereference(res->ies);
5903         if (ies) {
5904                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5905                         goto fail_unlock_rcu;
5906                 tsf = true;
5907                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5908                                         ies->len, ies->data))
5909                         goto fail_unlock_rcu;
5910         }
5911         ies = rcu_dereference(res->beacon_ies);
5912         if (ies) {
5913                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5914                         goto fail_unlock_rcu;
5915                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5916                                         ies->len, ies->data))
5917                         goto fail_unlock_rcu;
5918         }
5919         rcu_read_unlock();
5920
5921         if (res->beacon_interval &&
5922             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5923                 goto nla_put_failure;
5924         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5925             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5926             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
5927             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5928                         jiffies_to_msecs(jiffies - intbss->ts)))
5929                 goto nla_put_failure;
5930
5931         switch (rdev->wiphy.signal_type) {
5932         case CFG80211_SIGNAL_TYPE_MBM:
5933                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5934                         goto nla_put_failure;
5935                 break;
5936         case CFG80211_SIGNAL_TYPE_UNSPEC:
5937                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5938                         goto nla_put_failure;
5939                 break;
5940         default:
5941                 break;
5942         }
5943
5944         switch (wdev->iftype) {
5945         case NL80211_IFTYPE_P2P_CLIENT:
5946         case NL80211_IFTYPE_STATION:
5947                 if (intbss == wdev->current_bss &&
5948                     nla_put_u32(msg, NL80211_BSS_STATUS,
5949                                 NL80211_BSS_STATUS_ASSOCIATED))
5950                         goto nla_put_failure;
5951                 break;
5952         case NL80211_IFTYPE_ADHOC:
5953                 if (intbss == wdev->current_bss &&
5954                     nla_put_u32(msg, NL80211_BSS_STATUS,
5955                                 NL80211_BSS_STATUS_IBSS_JOINED))
5956                         goto nla_put_failure;
5957                 break;
5958         default:
5959                 break;
5960         }
5961
5962         nla_nest_end(msg, bss);
5963
5964         return genlmsg_end(msg, hdr);
5965
5966  fail_unlock_rcu:
5967         rcu_read_unlock();
5968  nla_put_failure:
5969         genlmsg_cancel(msg, hdr);
5970         return -EMSGSIZE;
5971 }
5972
5973 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5974 {
5975         struct cfg80211_registered_device *rdev;
5976         struct cfg80211_internal_bss *scan;
5977         struct wireless_dev *wdev;
5978         int start = cb->args[2], idx = 0;
5979         int err;
5980
5981         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5982         if (err)
5983                 return err;
5984
5985         wdev_lock(wdev);
5986         spin_lock_bh(&rdev->bss_lock);
5987         cfg80211_bss_expire(rdev);
5988
5989         cb->seq = rdev->bss_generation;
5990
5991         list_for_each_entry(scan, &rdev->bss_list, list) {
5992                 if (++idx <= start)
5993                         continue;
5994                 if (nl80211_send_bss(skb, cb,
5995                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5996                                 rdev, wdev, scan) < 0) {
5997                         idx--;
5998                         break;
5999                 }
6000         }
6001
6002         spin_unlock_bh(&rdev->bss_lock);
6003         wdev_unlock(wdev);
6004
6005         cb->args[2] = idx;
6006         nl80211_finish_wdev_dump(rdev);
6007
6008         return skb->len;
6009 }
6010
6011 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6012                                 int flags, struct net_device *dev,
6013                                 struct survey_info *survey)
6014 {
6015         void *hdr;
6016         struct nlattr *infoattr;
6017
6018         hdr = nl80211hdr_put(msg, portid, seq, flags,
6019                              NL80211_CMD_NEW_SURVEY_RESULTS);
6020         if (!hdr)
6021                 return -ENOMEM;
6022
6023         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6024                 goto nla_put_failure;
6025
6026         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6027         if (!infoattr)
6028                 goto nla_put_failure;
6029
6030         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6031                         survey->channel->center_freq))
6032                 goto nla_put_failure;
6033
6034         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6035             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6036                 goto nla_put_failure;
6037         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6038             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6039                 goto nla_put_failure;
6040         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6041             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6042                         survey->channel_time))
6043                 goto nla_put_failure;
6044         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6045             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6046                         survey->channel_time_busy))
6047                 goto nla_put_failure;
6048         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6049             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6050                         survey->channel_time_ext_busy))
6051                 goto nla_put_failure;
6052         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6053             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6054                         survey->channel_time_rx))
6055                 goto nla_put_failure;
6056         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6057             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6058                         survey->channel_time_tx))
6059                 goto nla_put_failure;
6060
6061         nla_nest_end(msg, infoattr);
6062
6063         return genlmsg_end(msg, hdr);
6064
6065  nla_put_failure:
6066         genlmsg_cancel(msg, hdr);
6067         return -EMSGSIZE;
6068 }
6069
6070 static int nl80211_dump_survey(struct sk_buff *skb,
6071                         struct netlink_callback *cb)
6072 {
6073         struct survey_info survey;
6074         struct cfg80211_registered_device *dev;
6075         struct wireless_dev *wdev;
6076         int survey_idx = cb->args[2];
6077         int res;
6078
6079         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
6080         if (res)
6081                 return res;
6082
6083         if (!wdev->netdev) {
6084                 res = -EINVAL;
6085                 goto out_err;
6086         }
6087
6088         if (!dev->ops->dump_survey) {
6089                 res = -EOPNOTSUPP;
6090                 goto out_err;
6091         }
6092
6093         while (1) {
6094                 struct ieee80211_channel *chan;
6095
6096                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
6097                 if (res == -ENOENT)
6098                         break;
6099                 if (res)
6100                         goto out_err;
6101
6102                 /* Survey without a channel doesn't make sense */
6103                 if (!survey.channel) {
6104                         res = -EINVAL;
6105                         goto out;
6106                 }
6107
6108                 chan = ieee80211_get_channel(&dev->wiphy,
6109                                              survey.channel->center_freq);
6110                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6111                         survey_idx++;
6112                         continue;
6113                 }
6114
6115                 if (nl80211_send_survey(skb,
6116                                 NETLINK_CB(cb->skb).portid,
6117                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6118                                 wdev->netdev, &survey) < 0)
6119                         goto out;
6120                 survey_idx++;
6121         }
6122
6123  out:
6124         cb->args[2] = survey_idx;
6125         res = skb->len;
6126  out_err:
6127         nl80211_finish_wdev_dump(dev);
6128         return res;
6129 }
6130
6131 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6132 {
6133         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6134                                   NL80211_WPA_VERSION_2));
6135 }
6136
6137 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6138 {
6139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6140         struct net_device *dev = info->user_ptr[1];
6141         struct ieee80211_channel *chan;
6142         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6143         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6144         enum nl80211_auth_type auth_type;
6145         struct key_parse key;
6146         bool local_state_change;
6147
6148         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6149                 return -EINVAL;
6150
6151         if (!info->attrs[NL80211_ATTR_MAC])
6152                 return -EINVAL;
6153
6154         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6155                 return -EINVAL;
6156
6157         if (!info->attrs[NL80211_ATTR_SSID])
6158                 return -EINVAL;
6159
6160         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6161                 return -EINVAL;
6162
6163         err = nl80211_parse_key(info, &key);
6164         if (err)
6165                 return err;
6166
6167         if (key.idx >= 0) {
6168                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6169                         return -EINVAL;
6170                 if (!key.p.key || !key.p.key_len)
6171                         return -EINVAL;
6172                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6173                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6174                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6175                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6176                         return -EINVAL;
6177                 if (key.idx > 4)
6178                         return -EINVAL;
6179         } else {
6180                 key.p.key_len = 0;
6181                 key.p.key = NULL;
6182         }
6183
6184         if (key.idx >= 0) {
6185                 int i;
6186                 bool ok = false;
6187                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6188                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6189                                 ok = true;
6190                                 break;
6191                         }
6192                 }
6193                 if (!ok)
6194                         return -EINVAL;
6195         }
6196
6197         if (!rdev->ops->auth)
6198                 return -EOPNOTSUPP;
6199
6200         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6201             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6202                 return -EOPNOTSUPP;
6203
6204         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6205         chan = ieee80211_get_channel(&rdev->wiphy,
6206                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6207         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6208                 return -EINVAL;
6209
6210         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6211         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6212
6213         if (info->attrs[NL80211_ATTR_IE]) {
6214                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6215                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6216         }
6217
6218         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6219         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6220                 return -EINVAL;
6221
6222         if (auth_type == NL80211_AUTHTYPE_SAE &&
6223             !info->attrs[NL80211_ATTR_SAE_DATA])
6224                 return -EINVAL;
6225
6226         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6227                 if (auth_type != NL80211_AUTHTYPE_SAE)
6228                         return -EINVAL;
6229                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6230                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6231                 /* need to include at least Auth Transaction and Status Code */
6232                 if (sae_data_len < 4)
6233                         return -EINVAL;
6234         }
6235
6236         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6237
6238         /*
6239          * Since we no longer track auth state, ignore
6240          * requests to only change local state.
6241          */
6242         if (local_state_change)
6243                 return 0;
6244
6245         wdev_lock(dev->ieee80211_ptr);
6246         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6247                                  ssid, ssid_len, ie, ie_len,
6248                                  key.p.key, key.p.key_len, key.idx,
6249                                  sae_data, sae_data_len);
6250         wdev_unlock(dev->ieee80211_ptr);
6251         return err;
6252 }
6253
6254 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6255                                    struct genl_info *info,
6256                                    struct cfg80211_crypto_settings *settings,
6257                                    int cipher_limit)
6258 {
6259         memset(settings, 0, sizeof(*settings));
6260
6261         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6262
6263         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6264                 u16 proto;
6265                 proto = nla_get_u16(
6266                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6267                 settings->control_port_ethertype = cpu_to_be16(proto);
6268                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6269                     proto != ETH_P_PAE)
6270                         return -EINVAL;
6271                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6272                         settings->control_port_no_encrypt = true;
6273         } else
6274                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6275
6276         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6277                 void *data;
6278                 int len, i;
6279
6280                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6281                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6282                 settings->n_ciphers_pairwise = len / sizeof(u32);
6283
6284                 if (len % sizeof(u32))
6285                         return -EINVAL;
6286
6287                 if (settings->n_ciphers_pairwise > cipher_limit)
6288                         return -EINVAL;
6289
6290                 memcpy(settings->ciphers_pairwise, data, len);
6291
6292                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6293                         if (!cfg80211_supported_cipher_suite(
6294                                         &rdev->wiphy,
6295                                         settings->ciphers_pairwise[i]))
6296                                 return -EINVAL;
6297         }
6298
6299         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6300                 settings->cipher_group =
6301                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6302                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6303                                                      settings->cipher_group))
6304                         return -EINVAL;
6305         }
6306
6307         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6308                 settings->wpa_versions =
6309                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6310                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6311                         return -EINVAL;
6312         }
6313
6314         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6315                 void *data;
6316                 int len;
6317
6318                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6319                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6320                 settings->n_akm_suites = len / sizeof(u32);
6321
6322                 if (len % sizeof(u32))
6323                         return -EINVAL;
6324
6325                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6326                         return -EINVAL;
6327
6328                 memcpy(settings->akm_suites, data, len);
6329         }
6330
6331         return 0;
6332 }
6333
6334 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6335 {
6336         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6337         struct net_device *dev = info->user_ptr[1];
6338         struct ieee80211_channel *chan;
6339         struct cfg80211_assoc_request req = {};
6340         const u8 *bssid, *ssid;
6341         int err, ssid_len = 0;
6342
6343         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6344                 return -EINVAL;
6345
6346         if (!info->attrs[NL80211_ATTR_MAC] ||
6347             !info->attrs[NL80211_ATTR_SSID] ||
6348             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6349                 return -EINVAL;
6350
6351         if (!rdev->ops->assoc)
6352                 return -EOPNOTSUPP;
6353
6354         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6355             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6356                 return -EOPNOTSUPP;
6357
6358         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6359
6360         chan = ieee80211_get_channel(&rdev->wiphy,
6361                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6362         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6363                 return -EINVAL;
6364
6365         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6366         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6367
6368         if (info->attrs[NL80211_ATTR_IE]) {
6369                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6370                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6371         }
6372
6373         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6374                 enum nl80211_mfp mfp =
6375                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6376                 if (mfp == NL80211_MFP_REQUIRED)
6377                         req.use_mfp = true;
6378                 else if (mfp != NL80211_MFP_NO)
6379                         return -EINVAL;
6380         }
6381
6382         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6383                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6384
6385         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6386                 req.flags |= ASSOC_REQ_DISABLE_HT;
6387
6388         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6389                 memcpy(&req.ht_capa_mask,
6390                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6391                        sizeof(req.ht_capa_mask));
6392
6393         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6394                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6395                         return -EINVAL;
6396                 memcpy(&req.ht_capa,
6397                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6398                        sizeof(req.ht_capa));
6399         }
6400
6401         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6402                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6403
6404         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6405                 memcpy(&req.vht_capa_mask,
6406                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6407                        sizeof(req.vht_capa_mask));
6408
6409         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6410                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6411                         return -EINVAL;
6412                 memcpy(&req.vht_capa,
6413                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6414                        sizeof(req.vht_capa));
6415         }
6416
6417         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6418         if (!err) {
6419                 wdev_lock(dev->ieee80211_ptr);
6420                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6421                                           ssid, ssid_len, &req);
6422                 wdev_unlock(dev->ieee80211_ptr);
6423         }
6424
6425         return err;
6426 }
6427
6428 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6429 {
6430         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6431         struct net_device *dev = info->user_ptr[1];
6432         const u8 *ie = NULL, *bssid;
6433         int ie_len = 0, err;
6434         u16 reason_code;
6435         bool local_state_change;
6436
6437         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6438                 return -EINVAL;
6439
6440         if (!info->attrs[NL80211_ATTR_MAC])
6441                 return -EINVAL;
6442
6443         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6444                 return -EINVAL;
6445
6446         if (!rdev->ops->deauth)
6447                 return -EOPNOTSUPP;
6448
6449         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6450             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6451                 return -EOPNOTSUPP;
6452
6453         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6454
6455         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6456         if (reason_code == 0) {
6457                 /* Reason Code 0 is reserved */
6458                 return -EINVAL;
6459         }
6460
6461         if (info->attrs[NL80211_ATTR_IE]) {
6462                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6463                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6464         }
6465
6466         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6467
6468         wdev_lock(dev->ieee80211_ptr);
6469         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6470                                    local_state_change);
6471         wdev_unlock(dev->ieee80211_ptr);
6472         return err;
6473 }
6474
6475 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6476 {
6477         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6478         struct net_device *dev = info->user_ptr[1];
6479         const u8 *ie = NULL, *bssid;
6480         int ie_len = 0, err;
6481         u16 reason_code;
6482         bool local_state_change;
6483
6484         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6485                 return -EINVAL;
6486
6487         if (!info->attrs[NL80211_ATTR_MAC])
6488                 return -EINVAL;
6489
6490         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6491                 return -EINVAL;
6492
6493         if (!rdev->ops->disassoc)
6494                 return -EOPNOTSUPP;
6495
6496         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6497             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6498                 return -EOPNOTSUPP;
6499
6500         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6501
6502         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6503         if (reason_code == 0) {
6504                 /* Reason Code 0 is reserved */
6505                 return -EINVAL;
6506         }
6507
6508         if (info->attrs[NL80211_ATTR_IE]) {
6509                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6510                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6511         }
6512
6513         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6514
6515         wdev_lock(dev->ieee80211_ptr);
6516         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6517                                      local_state_change);
6518         wdev_unlock(dev->ieee80211_ptr);
6519         return err;
6520 }
6521
6522 static bool
6523 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6524                          int mcast_rate[IEEE80211_NUM_BANDS],
6525                          int rateval)
6526 {
6527         struct wiphy *wiphy = &rdev->wiphy;
6528         bool found = false;
6529         int band, i;
6530
6531         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6532                 struct ieee80211_supported_band *sband;
6533
6534                 sband = wiphy->bands[band];
6535                 if (!sband)
6536                         continue;
6537
6538                 for (i = 0; i < sband->n_bitrates; i++) {
6539                         if (sband->bitrates[i].bitrate == rateval) {
6540                                 mcast_rate[band] = i + 1;
6541                                 found = true;
6542                                 break;
6543                         }
6544                 }
6545         }
6546
6547         return found;
6548 }
6549
6550 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6551 {
6552         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6553         struct net_device *dev = info->user_ptr[1];
6554         struct cfg80211_ibss_params ibss;
6555         struct wiphy *wiphy;
6556         struct cfg80211_cached_keys *connkeys = NULL;
6557         int err;
6558
6559         memset(&ibss, 0, sizeof(ibss));
6560
6561         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6562                 return -EINVAL;
6563
6564         if (!info->attrs[NL80211_ATTR_SSID] ||
6565             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6566                 return -EINVAL;
6567
6568         ibss.beacon_interval = 100;
6569
6570         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6571                 ibss.beacon_interval =
6572                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6573                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6574                         return -EINVAL;
6575         }
6576
6577         if (!rdev->ops->join_ibss)
6578                 return -EOPNOTSUPP;
6579
6580         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6581                 return -EOPNOTSUPP;
6582
6583         wiphy = &rdev->wiphy;
6584
6585         if (info->attrs[NL80211_ATTR_MAC]) {
6586                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6587
6588                 if (!is_valid_ether_addr(ibss.bssid))
6589                         return -EINVAL;
6590         }
6591         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6592         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6593
6594         if (info->attrs[NL80211_ATTR_IE]) {
6595                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6596                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6597         }
6598
6599         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6600         if (err)
6601                 return err;
6602
6603         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6604                 return -EINVAL;
6605
6606         switch (ibss.chandef.width) {
6607         case NL80211_CHAN_WIDTH_5:
6608         case NL80211_CHAN_WIDTH_10:
6609         case NL80211_CHAN_WIDTH_20_NOHT:
6610                 break;
6611         case NL80211_CHAN_WIDTH_20:
6612         case NL80211_CHAN_WIDTH_40:
6613                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6614                         break;
6615         default:
6616                 return -EINVAL;
6617         }
6618
6619         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6620         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6621
6622         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6623                 u8 *rates =
6624                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6625                 int n_rates =
6626                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6627                 struct ieee80211_supported_band *sband =
6628                         wiphy->bands[ibss.chandef.chan->band];
6629
6630                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6631                                              &ibss.basic_rates);
6632                 if (err)
6633                         return err;
6634         }
6635
6636         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6637                 memcpy(&ibss.ht_capa_mask,
6638                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6639                        sizeof(ibss.ht_capa_mask));
6640
6641         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6642                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6643                         return -EINVAL;
6644                 memcpy(&ibss.ht_capa,
6645                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6646                        sizeof(ibss.ht_capa));
6647         }
6648
6649         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6650             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6651                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6652                 return -EINVAL;
6653
6654         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6655                 bool no_ht = false;
6656
6657                 connkeys = nl80211_parse_connkeys(rdev,
6658                                           info->attrs[NL80211_ATTR_KEYS],
6659                                           &no_ht);
6660                 if (IS_ERR(connkeys))
6661                         return PTR_ERR(connkeys);
6662
6663                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6664                     no_ht) {
6665                         kfree(connkeys);
6666                         return -EINVAL;
6667                 }
6668         }
6669
6670         ibss.control_port =
6671                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6672
6673         ibss.userspace_handles_dfs =
6674                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6675
6676         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6677         if (err)
6678                 kfree(connkeys);
6679         return err;
6680 }
6681
6682 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6683 {
6684         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6685         struct net_device *dev = info->user_ptr[1];
6686
6687         if (!rdev->ops->leave_ibss)
6688                 return -EOPNOTSUPP;
6689
6690         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6691                 return -EOPNOTSUPP;
6692
6693         return cfg80211_leave_ibss(rdev, dev, false);
6694 }
6695
6696 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6697 {
6698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6699         struct net_device *dev = info->user_ptr[1];
6700         int mcast_rate[IEEE80211_NUM_BANDS];
6701         u32 nla_rate;
6702         int err;
6703
6704         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6705             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6706                 return -EOPNOTSUPP;
6707
6708         if (!rdev->ops->set_mcast_rate)
6709                 return -EOPNOTSUPP;
6710
6711         memset(mcast_rate, 0, sizeof(mcast_rate));
6712
6713         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6714                 return -EINVAL;
6715
6716         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6717         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6718                 return -EINVAL;
6719
6720         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6721
6722         return err;
6723 }
6724
6725 static struct sk_buff *
6726 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
6727                             int approxlen, u32 portid, u32 seq,
6728                             enum nl80211_commands cmd,
6729                             enum nl80211_attrs attr, gfp_t gfp)
6730 {
6731         struct sk_buff *skb;
6732         void *hdr;
6733         struct nlattr *data;
6734
6735         skb = nlmsg_new(approxlen + 100, gfp);
6736         if (!skb)
6737                 return NULL;
6738
6739         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
6740         if (!hdr) {
6741                 kfree_skb(skb);
6742                 return NULL;
6743         }
6744
6745         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6746                 goto nla_put_failure;
6747         data = nla_nest_start(skb, attr);
6748
6749         ((void **)skb->cb)[0] = rdev;
6750         ((void **)skb->cb)[1] = hdr;
6751         ((void **)skb->cb)[2] = data;
6752
6753         return skb;
6754
6755  nla_put_failure:
6756         kfree_skb(skb);
6757         return NULL;
6758 }
6759
6760 #ifdef CONFIG_NL80211_TESTMODE
6761 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6762 {
6763         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6764         struct wireless_dev *wdev =
6765                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6766         int err;
6767
6768         if (!rdev->ops->testmode_cmd)
6769                 return -EOPNOTSUPP;
6770
6771         if (IS_ERR(wdev)) {
6772                 err = PTR_ERR(wdev);
6773                 if (err != -EINVAL)
6774                         return err;
6775                 wdev = NULL;
6776         } else if (wdev->wiphy != &rdev->wiphy) {
6777                 return -EINVAL;
6778         }
6779
6780         if (!info->attrs[NL80211_ATTR_TESTDATA])
6781                 return -EINVAL;
6782
6783         rdev->cur_cmd_info = info;
6784         err = rdev_testmode_cmd(rdev, wdev,
6785                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6786                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6787         rdev->cur_cmd_info = NULL;
6788
6789         return err;
6790 }
6791
6792 static int nl80211_testmode_dump(struct sk_buff *skb,
6793                                  struct netlink_callback *cb)
6794 {
6795         struct cfg80211_registered_device *rdev;
6796         int err;
6797         long phy_idx;
6798         void *data = NULL;
6799         int data_len = 0;
6800
6801         rtnl_lock();
6802
6803         if (cb->args[0]) {
6804                 /*
6805                  * 0 is a valid index, but not valid for args[0],
6806                  * so we need to offset by 1.
6807                  */
6808                 phy_idx = cb->args[0] - 1;
6809         } else {
6810                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6811                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6812                                   nl80211_policy);
6813                 if (err)
6814                         goto out_err;
6815
6816                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6817                                                   nl80211_fam.attrbuf);
6818                 if (IS_ERR(rdev)) {
6819                         err = PTR_ERR(rdev);
6820                         goto out_err;
6821                 }
6822                 phy_idx = rdev->wiphy_idx;
6823                 rdev = NULL;
6824
6825                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6826                         cb->args[1] =
6827                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6828         }
6829
6830         if (cb->args[1]) {
6831                 data = nla_data((void *)cb->args[1]);
6832                 data_len = nla_len((void *)cb->args[1]);
6833         }
6834
6835         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6836         if (!rdev) {
6837                 err = -ENOENT;
6838                 goto out_err;
6839         }
6840
6841         if (!rdev->ops->testmode_dump) {
6842                 err = -EOPNOTSUPP;
6843                 goto out_err;
6844         }
6845
6846         while (1) {
6847                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6848                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6849                                            NL80211_CMD_TESTMODE);
6850                 struct nlattr *tmdata;
6851
6852                 if (!hdr)
6853                         break;
6854
6855                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6856                         genlmsg_cancel(skb, hdr);
6857                         break;
6858                 }
6859
6860                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6861                 if (!tmdata) {
6862                         genlmsg_cancel(skb, hdr);
6863                         break;
6864                 }
6865                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6866                 nla_nest_end(skb, tmdata);
6867
6868                 if (err == -ENOBUFS || err == -ENOENT) {
6869                         genlmsg_cancel(skb, hdr);
6870                         break;
6871                 } else if (err) {
6872                         genlmsg_cancel(skb, hdr);
6873                         goto out_err;
6874                 }
6875
6876                 genlmsg_end(skb, hdr);
6877         }
6878
6879         err = skb->len;
6880         /* see above */
6881         cb->args[0] = phy_idx + 1;
6882  out_err:
6883         rtnl_unlock();
6884         return err;
6885 }
6886
6887 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6888                                                   int approxlen, gfp_t gfp)
6889 {
6890         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6891
6892         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
6893                                            NL80211_CMD_TESTMODE,
6894                                            NL80211_ATTR_TESTDATA, gfp);
6895 }
6896 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6897
6898 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6899 {
6900         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6901         void *hdr = ((void **)skb->cb)[1];
6902         struct nlattr *data = ((void **)skb->cb)[2];
6903
6904         nla_nest_end(skb, data);
6905         genlmsg_end(skb, hdr);
6906         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
6907                                 NL80211_MCGRP_TESTMODE, gfp);
6908 }
6909 EXPORT_SYMBOL(cfg80211_testmode_event);
6910 #endif
6911
6912 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6913 {
6914         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6915         struct net_device *dev = info->user_ptr[1];
6916         struct cfg80211_connect_params connect;
6917         struct wiphy *wiphy;
6918         struct cfg80211_cached_keys *connkeys = NULL;
6919         int err;
6920
6921         memset(&connect, 0, sizeof(connect));
6922
6923         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6924                 return -EINVAL;
6925
6926         if (!info->attrs[NL80211_ATTR_SSID] ||
6927             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6928                 return -EINVAL;
6929
6930         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6931                 connect.auth_type =
6932                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6933                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6934                                              NL80211_CMD_CONNECT))
6935                         return -EINVAL;
6936         } else
6937                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6938
6939         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6940
6941         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6942                                       NL80211_MAX_NR_CIPHER_SUITES);
6943         if (err)
6944                 return err;
6945
6946         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6947             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6948                 return -EOPNOTSUPP;
6949
6950         wiphy = &rdev->wiphy;
6951
6952         connect.bg_scan_period = -1;
6953         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6954                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6955                 connect.bg_scan_period =
6956                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6957         }
6958
6959         if (info->attrs[NL80211_ATTR_MAC])
6960                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6961         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6962         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6963
6964         if (info->attrs[NL80211_ATTR_IE]) {
6965                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6966                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6967         }
6968
6969         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6970                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6971                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6972                     connect.mfp != NL80211_MFP_NO)
6973                         return -EINVAL;
6974         } else {
6975                 connect.mfp = NL80211_MFP_NO;
6976         }
6977
6978         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6979                 connect.channel =
6980                         ieee80211_get_channel(wiphy,
6981                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6982                 if (!connect.channel ||
6983                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6984                         return -EINVAL;
6985         }
6986
6987         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6988                 connkeys = nl80211_parse_connkeys(rdev,
6989                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6990                 if (IS_ERR(connkeys))
6991                         return PTR_ERR(connkeys);
6992         }
6993
6994         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6995                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6996
6997         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6998                 memcpy(&connect.ht_capa_mask,
6999                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7000                        sizeof(connect.ht_capa_mask));
7001
7002         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7003                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7004                         kfree(connkeys);
7005                         return -EINVAL;
7006                 }
7007                 memcpy(&connect.ht_capa,
7008                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7009                        sizeof(connect.ht_capa));
7010         }
7011
7012         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7013                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7014
7015         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7016                 memcpy(&connect.vht_capa_mask,
7017                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7018                        sizeof(connect.vht_capa_mask));
7019
7020         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7021                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7022                         kfree(connkeys);
7023                         return -EINVAL;
7024                 }
7025                 memcpy(&connect.vht_capa,
7026                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7027                        sizeof(connect.vht_capa));
7028         }
7029
7030         wdev_lock(dev->ieee80211_ptr);
7031         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7032         wdev_unlock(dev->ieee80211_ptr);
7033         if (err)
7034                 kfree(connkeys);
7035         return err;
7036 }
7037
7038 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7039 {
7040         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7041         struct net_device *dev = info->user_ptr[1];
7042         u16 reason;
7043         int ret;
7044
7045         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7046                 reason = WLAN_REASON_DEAUTH_LEAVING;
7047         else
7048                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7049
7050         if (reason == 0)
7051                 return -EINVAL;
7052
7053         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7054             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7055                 return -EOPNOTSUPP;
7056
7057         wdev_lock(dev->ieee80211_ptr);
7058         ret = cfg80211_disconnect(rdev, dev, reason, true);
7059         wdev_unlock(dev->ieee80211_ptr);
7060         return ret;
7061 }
7062
7063 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7064 {
7065         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7066         struct net *net;
7067         int err;
7068         u32 pid;
7069
7070         if (!info->attrs[NL80211_ATTR_PID])
7071                 return -EINVAL;
7072
7073         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7074
7075         net = get_net_ns_by_pid(pid);
7076         if (IS_ERR(net))
7077                 return PTR_ERR(net);
7078
7079         err = 0;
7080
7081         /* check if anything to do */
7082         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7083                 err = cfg80211_switch_netns(rdev, net);
7084
7085         put_net(net);
7086         return err;
7087 }
7088
7089 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7090 {
7091         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7092         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7093                         struct cfg80211_pmksa *pmksa) = NULL;
7094         struct net_device *dev = info->user_ptr[1];
7095         struct cfg80211_pmksa pmksa;
7096
7097         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7098
7099         if (!info->attrs[NL80211_ATTR_MAC])
7100                 return -EINVAL;
7101
7102         if (!info->attrs[NL80211_ATTR_PMKID])
7103                 return -EINVAL;
7104
7105         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7106         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7107
7108         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7109             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7110                 return -EOPNOTSUPP;
7111
7112         switch (info->genlhdr->cmd) {
7113         case NL80211_CMD_SET_PMKSA:
7114                 rdev_ops = rdev->ops->set_pmksa;
7115                 break;
7116         case NL80211_CMD_DEL_PMKSA:
7117                 rdev_ops = rdev->ops->del_pmksa;
7118                 break;
7119         default:
7120                 WARN_ON(1);
7121                 break;
7122         }
7123
7124         if (!rdev_ops)
7125                 return -EOPNOTSUPP;
7126
7127         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7128 }
7129
7130 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7131 {
7132         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7133         struct net_device *dev = info->user_ptr[1];
7134
7135         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7136             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7137                 return -EOPNOTSUPP;
7138
7139         if (!rdev->ops->flush_pmksa)
7140                 return -EOPNOTSUPP;
7141
7142         return rdev_flush_pmksa(rdev, dev);
7143 }
7144
7145 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7146 {
7147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7148         struct net_device *dev = info->user_ptr[1];
7149         u8 action_code, dialog_token;
7150         u16 status_code;
7151         u8 *peer;
7152
7153         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7154             !rdev->ops->tdls_mgmt)
7155                 return -EOPNOTSUPP;
7156
7157         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7158             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7159             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7160             !info->attrs[NL80211_ATTR_IE] ||
7161             !info->attrs[NL80211_ATTR_MAC])
7162                 return -EINVAL;
7163
7164         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7165         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7166         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7167         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7168
7169         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7170                               dialog_token, status_code,
7171                               nla_data(info->attrs[NL80211_ATTR_IE]),
7172                               nla_len(info->attrs[NL80211_ATTR_IE]));
7173 }
7174
7175 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7176 {
7177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7178         struct net_device *dev = info->user_ptr[1];
7179         enum nl80211_tdls_operation operation;
7180         u8 *peer;
7181
7182         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7183             !rdev->ops->tdls_oper)
7184                 return -EOPNOTSUPP;
7185
7186         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7187             !info->attrs[NL80211_ATTR_MAC])
7188                 return -EINVAL;
7189
7190         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7191         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7192
7193         return rdev_tdls_oper(rdev, dev, peer, operation);
7194 }
7195
7196 static int nl80211_remain_on_channel(struct sk_buff *skb,
7197                                      struct genl_info *info)
7198 {
7199         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7200         struct wireless_dev *wdev = info->user_ptr[1];
7201         struct cfg80211_chan_def chandef;
7202         struct sk_buff *msg;
7203         void *hdr;
7204         u64 cookie;
7205         u32 duration;
7206         int err;
7207
7208         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7209             !info->attrs[NL80211_ATTR_DURATION])
7210                 return -EINVAL;
7211
7212         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7213
7214         if (!rdev->ops->remain_on_channel ||
7215             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7216                 return -EOPNOTSUPP;
7217
7218         /*
7219          * We should be on that channel for at least a minimum amount of
7220          * time (10ms) but no longer than the driver supports.
7221          */
7222         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7223             duration > rdev->wiphy.max_remain_on_channel_duration)
7224                 return -EINVAL;
7225
7226         err = nl80211_parse_chandef(rdev, info, &chandef);
7227         if (err)
7228                 return err;
7229
7230         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7231         if (!msg)
7232                 return -ENOMEM;
7233
7234         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7235                              NL80211_CMD_REMAIN_ON_CHANNEL);
7236         if (!hdr) {
7237                 err = -ENOBUFS;
7238                 goto free_msg;
7239         }
7240
7241         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7242                                      duration, &cookie);
7243
7244         if (err)
7245                 goto free_msg;
7246
7247         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7248                 goto nla_put_failure;
7249
7250         genlmsg_end(msg, hdr);
7251
7252         return genlmsg_reply(msg, info);
7253
7254  nla_put_failure:
7255         err = -ENOBUFS;
7256  free_msg:
7257         nlmsg_free(msg);
7258         return err;
7259 }
7260
7261 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7262                                             struct genl_info *info)
7263 {
7264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7265         struct wireless_dev *wdev = info->user_ptr[1];
7266         u64 cookie;
7267
7268         if (!info->attrs[NL80211_ATTR_COOKIE])
7269                 return -EINVAL;
7270
7271         if (!rdev->ops->cancel_remain_on_channel)
7272                 return -EOPNOTSUPP;
7273
7274         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7275
7276         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7277 }
7278
7279 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7280                            u8 *rates, u8 rates_len)
7281 {
7282         u8 i;
7283         u32 mask = 0;
7284
7285         for (i = 0; i < rates_len; i++) {
7286                 int rate = (rates[i] & 0x7f) * 5;
7287                 int ridx;
7288                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7289                         struct ieee80211_rate *srate =
7290                                 &sband->bitrates[ridx];
7291                         if (rate == srate->bitrate) {
7292                                 mask |= 1 << ridx;
7293                                 break;
7294                         }
7295                 }
7296                 if (ridx == sband->n_bitrates)
7297                         return 0; /* rate not found */
7298         }
7299
7300         return mask;
7301 }
7302
7303 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7304                                u8 *rates, u8 rates_len,
7305                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7306 {
7307         u8 i;
7308
7309         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7310
7311         for (i = 0; i < rates_len; i++) {
7312                 int ridx, rbit;
7313
7314                 ridx = rates[i] / 8;
7315                 rbit = BIT(rates[i] % 8);
7316
7317                 /* check validity */
7318                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7319                         return false;
7320
7321                 /* check availability */
7322                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7323                         mcs[ridx] |= rbit;
7324                 else
7325                         return false;
7326         }
7327
7328         return true;
7329 }
7330
7331 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7332         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7333                                     .len = NL80211_MAX_SUPP_RATES },
7334         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
7335                                 .len = NL80211_MAX_SUPP_HT_RATES },
7336 };
7337
7338 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7339                                        struct genl_info *info)
7340 {
7341         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7342         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7343         struct cfg80211_bitrate_mask mask;
7344         int rem, i;
7345         struct net_device *dev = info->user_ptr[1];
7346         struct nlattr *tx_rates;
7347         struct ieee80211_supported_band *sband;
7348
7349         if (!rdev->ops->set_bitrate_mask)
7350                 return -EOPNOTSUPP;
7351
7352         memset(&mask, 0, sizeof(mask));
7353         /* Default to all rates enabled */
7354         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7355                 sband = rdev->wiphy.bands[i];
7356
7357                 if (!sband)
7358                         continue;
7359
7360                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
7361                 memcpy(mask.control[i].ht_mcs,
7362                        sband->ht_cap.mcs.rx_mask,
7363                        sizeof(mask.control[i].ht_mcs));
7364         }
7365
7366         /* if no rates are given set it back to the defaults */
7367         if (!info->attrs[NL80211_ATTR_TX_RATES])
7368                 goto out;
7369
7370         /*
7371          * The nested attribute uses enum nl80211_band as the index. This maps
7372          * directly to the enum ieee80211_band values used in cfg80211.
7373          */
7374         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7375         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7376         {
7377                 enum ieee80211_band band = nla_type(tx_rates);
7378                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7379                         return -EINVAL;
7380                 sband = rdev->wiphy.bands[band];
7381                 if (sband == NULL)
7382                         return -EINVAL;
7383                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7384                           nla_len(tx_rates), nl80211_txattr_policy);
7385                 if (tb[NL80211_TXRATE_LEGACY]) {
7386                         mask.control[band].legacy = rateset_to_mask(
7387                                 sband,
7388                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7389                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7390                         if ((mask.control[band].legacy == 0) &&
7391                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7392                                 return -EINVAL;
7393                 }
7394                 if (tb[NL80211_TXRATE_HT]) {
7395                         if (!ht_rateset_to_mask(
7396                                         sband,
7397                                         nla_data(tb[NL80211_TXRATE_HT]),
7398                                         nla_len(tb[NL80211_TXRATE_HT]),
7399                                         mask.control[band].ht_mcs))
7400                                 return -EINVAL;
7401                 }
7402
7403                 if (mask.control[band].legacy == 0) {
7404                         /* don't allow empty legacy rates if HT
7405                          * is not even supported. */
7406                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7407                                 return -EINVAL;
7408
7409                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7410                                 if (mask.control[band].ht_mcs[i])
7411                                         break;
7412
7413                         /* legacy and mcs rates may not be both empty */
7414                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7415                                 return -EINVAL;
7416                 }
7417         }
7418
7419 out:
7420         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7421 }
7422
7423 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7424 {
7425         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7426         struct wireless_dev *wdev = info->user_ptr[1];
7427         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7428
7429         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7430                 return -EINVAL;
7431
7432         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7433                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7434
7435         switch (wdev->iftype) {
7436         case NL80211_IFTYPE_STATION:
7437         case NL80211_IFTYPE_ADHOC:
7438         case NL80211_IFTYPE_P2P_CLIENT:
7439         case NL80211_IFTYPE_AP:
7440         case NL80211_IFTYPE_AP_VLAN:
7441         case NL80211_IFTYPE_MESH_POINT:
7442         case NL80211_IFTYPE_P2P_GO:
7443         case NL80211_IFTYPE_P2P_DEVICE:
7444                 break;
7445         default:
7446                 return -EOPNOTSUPP;
7447         }
7448
7449         /* not much point in registering if we can't reply */
7450         if (!rdev->ops->mgmt_tx)
7451                 return -EOPNOTSUPP;
7452
7453         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7454                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7455                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7456 }
7457
7458 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7459 {
7460         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7461         struct wireless_dev *wdev = info->user_ptr[1];
7462         struct cfg80211_chan_def chandef;
7463         int err;
7464         void *hdr = NULL;
7465         u64 cookie;
7466         struct sk_buff *msg = NULL;
7467         struct cfg80211_mgmt_tx_params params = {
7468                 .dont_wait_for_ack =
7469                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
7470         };
7471
7472         if (!info->attrs[NL80211_ATTR_FRAME])
7473                 return -EINVAL;
7474
7475         if (!rdev->ops->mgmt_tx)
7476                 return -EOPNOTSUPP;
7477
7478         switch (wdev->iftype) {
7479         case NL80211_IFTYPE_P2P_DEVICE:
7480                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7481                         return -EINVAL;
7482         case NL80211_IFTYPE_STATION:
7483         case NL80211_IFTYPE_ADHOC:
7484         case NL80211_IFTYPE_P2P_CLIENT:
7485         case NL80211_IFTYPE_AP:
7486         case NL80211_IFTYPE_AP_VLAN:
7487         case NL80211_IFTYPE_MESH_POINT:
7488         case NL80211_IFTYPE_P2P_GO:
7489                 break;
7490         default:
7491                 return -EOPNOTSUPP;
7492         }
7493
7494         if (info->attrs[NL80211_ATTR_DURATION]) {
7495                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7496                         return -EINVAL;
7497                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7498
7499                 /*
7500                  * We should wait on the channel for at least a minimum amount
7501                  * of time (10ms) but no longer than the driver supports.
7502                  */
7503                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7504                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
7505                         return -EINVAL;
7506
7507         }
7508
7509         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7510
7511         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7512                 return -EINVAL;
7513
7514         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7515
7516         /* get the channel if any has been specified, otherwise pass NULL to
7517          * the driver. The latter will use the current one
7518          */
7519         chandef.chan = NULL;
7520         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7521                 err = nl80211_parse_chandef(rdev, info, &chandef);
7522                 if (err)
7523                         return err;
7524         }
7525
7526         if (!chandef.chan && params.offchan)
7527                 return -EINVAL;
7528
7529         if (!params.dont_wait_for_ack) {
7530                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7531                 if (!msg)
7532                         return -ENOMEM;
7533
7534                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7535                                      NL80211_CMD_FRAME);
7536                 if (!hdr) {
7537                         err = -ENOBUFS;
7538                         goto free_msg;
7539                 }
7540         }
7541
7542         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
7543         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
7544         params.chan = chandef.chan;
7545         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
7546         if (err)
7547                 goto free_msg;
7548
7549         if (msg) {
7550                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7551                         goto nla_put_failure;
7552
7553                 genlmsg_end(msg, hdr);
7554                 return genlmsg_reply(msg, info);
7555         }
7556
7557         return 0;
7558
7559  nla_put_failure:
7560         err = -ENOBUFS;
7561  free_msg:
7562         nlmsg_free(msg);
7563         return err;
7564 }
7565
7566 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7567 {
7568         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7569         struct wireless_dev *wdev = info->user_ptr[1];
7570         u64 cookie;
7571
7572         if (!info->attrs[NL80211_ATTR_COOKIE])
7573                 return -EINVAL;
7574
7575         if (!rdev->ops->mgmt_tx_cancel_wait)
7576                 return -EOPNOTSUPP;
7577
7578         switch (wdev->iftype) {
7579         case NL80211_IFTYPE_STATION:
7580         case NL80211_IFTYPE_ADHOC:
7581         case NL80211_IFTYPE_P2P_CLIENT:
7582         case NL80211_IFTYPE_AP:
7583         case NL80211_IFTYPE_AP_VLAN:
7584         case NL80211_IFTYPE_P2P_GO:
7585         case NL80211_IFTYPE_P2P_DEVICE:
7586                 break;
7587         default:
7588                 return -EOPNOTSUPP;
7589         }
7590
7591         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7592
7593         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7594 }
7595
7596 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7597 {
7598         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7599         struct wireless_dev *wdev;
7600         struct net_device *dev = info->user_ptr[1];
7601         u8 ps_state;
7602         bool state;
7603         int err;
7604
7605         if (!info->attrs[NL80211_ATTR_PS_STATE])
7606                 return -EINVAL;
7607
7608         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7609
7610         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7611                 return -EINVAL;
7612
7613         wdev = dev->ieee80211_ptr;
7614
7615         if (!rdev->ops->set_power_mgmt)
7616                 return -EOPNOTSUPP;
7617
7618         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7619
7620         if (state == wdev->ps)
7621                 return 0;
7622
7623         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7624         if (!err)
7625                 wdev->ps = state;
7626         return err;
7627 }
7628
7629 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7630 {
7631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7632         enum nl80211_ps_state ps_state;
7633         struct wireless_dev *wdev;
7634         struct net_device *dev = info->user_ptr[1];
7635         struct sk_buff *msg;
7636         void *hdr;
7637         int err;
7638
7639         wdev = dev->ieee80211_ptr;
7640
7641         if (!rdev->ops->set_power_mgmt)
7642                 return -EOPNOTSUPP;
7643
7644         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7645         if (!msg)
7646                 return -ENOMEM;
7647
7648         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7649                              NL80211_CMD_GET_POWER_SAVE);
7650         if (!hdr) {
7651                 err = -ENOBUFS;
7652                 goto free_msg;
7653         }
7654
7655         if (wdev->ps)
7656                 ps_state = NL80211_PS_ENABLED;
7657         else
7658                 ps_state = NL80211_PS_DISABLED;
7659
7660         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7661                 goto nla_put_failure;
7662
7663         genlmsg_end(msg, hdr);
7664         return genlmsg_reply(msg, info);
7665
7666  nla_put_failure:
7667         err = -ENOBUFS;
7668  free_msg:
7669         nlmsg_free(msg);
7670         return err;
7671 }
7672
7673 static struct nla_policy
7674 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7675         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7676         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7677         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7678         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7679         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7680         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7681 };
7682
7683 static int nl80211_set_cqm_txe(struct genl_info *info,
7684                                u32 rate, u32 pkts, u32 intvl)
7685 {
7686         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7687         struct net_device *dev = info->user_ptr[1];
7688         struct wireless_dev *wdev = dev->ieee80211_ptr;
7689
7690         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7691                 return -EINVAL;
7692
7693         if (!rdev->ops->set_cqm_txe_config)
7694                 return -EOPNOTSUPP;
7695
7696         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7697             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7698                 return -EOPNOTSUPP;
7699
7700         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7701 }
7702
7703 static int nl80211_set_cqm_rssi(struct genl_info *info,
7704                                 s32 threshold, u32 hysteresis)
7705 {
7706         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7707         struct net_device *dev = info->user_ptr[1];
7708         struct wireless_dev *wdev = dev->ieee80211_ptr;
7709
7710         if (threshold > 0)
7711                 return -EINVAL;
7712
7713         /* disabling - hysteresis should also be zero then */
7714         if (threshold == 0)
7715                 hysteresis = 0;
7716
7717         if (!rdev->ops->set_cqm_rssi_config)
7718                 return -EOPNOTSUPP;
7719
7720         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7721             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7722                 return -EOPNOTSUPP;
7723
7724         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7725 }
7726
7727 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7728 {
7729         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7730         struct nlattr *cqm;
7731         int err;
7732
7733         cqm = info->attrs[NL80211_ATTR_CQM];
7734         if (!cqm)
7735                 return -EINVAL;
7736
7737         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7738                                nl80211_attr_cqm_policy);
7739         if (err)
7740                 return err;
7741
7742         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7743             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7744                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7745                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7746
7747                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
7748         }
7749
7750         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7751             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7752             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7753                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7754                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7755                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7756
7757                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
7758         }
7759
7760         return -EINVAL;
7761 }
7762
7763 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7764 {
7765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7766         struct net_device *dev = info->user_ptr[1];
7767         struct mesh_config cfg;
7768         struct mesh_setup setup;
7769         int err;
7770
7771         /* start with default */
7772         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7773         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7774
7775         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7776                 /* and parse parameters if given */
7777                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7778                 if (err)
7779                         return err;
7780         }
7781
7782         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7783             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7784                 return -EINVAL;
7785
7786         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7787         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7788
7789         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7790             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7791                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7792                         return -EINVAL;
7793
7794         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7795                 setup.beacon_interval =
7796                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7797                 if (setup.beacon_interval < 10 ||
7798                     setup.beacon_interval > 10000)
7799                         return -EINVAL;
7800         }
7801
7802         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7803                 setup.dtim_period =
7804                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7805                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7806                         return -EINVAL;
7807         }
7808
7809         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7810                 /* parse additional setup parameters if given */
7811                 err = nl80211_parse_mesh_setup(info, &setup);
7812                 if (err)
7813                         return err;
7814         }
7815
7816         if (setup.user_mpm)
7817                 cfg.auto_open_plinks = false;
7818
7819         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7820                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7821                 if (err)
7822                         return err;
7823         } else {
7824                 /* cfg80211_join_mesh() will sort it out */
7825                 setup.chandef.chan = NULL;
7826         }
7827
7828         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7829                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7830                 int n_rates =
7831                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7832                 struct ieee80211_supported_band *sband;
7833
7834                 if (!setup.chandef.chan)
7835                         return -EINVAL;
7836
7837                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7838
7839                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7840                                              &setup.basic_rates);
7841                 if (err)
7842                         return err;
7843         }
7844
7845         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7846 }
7847
7848 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7849 {
7850         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7851         struct net_device *dev = info->user_ptr[1];
7852
7853         return cfg80211_leave_mesh(rdev, dev);
7854 }
7855
7856 #ifdef CONFIG_PM
7857 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7858                                         struct cfg80211_registered_device *rdev)
7859 {
7860         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7861         struct nlattr *nl_pats, *nl_pat;
7862         int i, pat_len;
7863
7864         if (!wowlan->n_patterns)
7865                 return 0;
7866
7867         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7868         if (!nl_pats)
7869                 return -ENOBUFS;
7870
7871         for (i = 0; i < wowlan->n_patterns; i++) {
7872                 nl_pat = nla_nest_start(msg, i + 1);
7873                 if (!nl_pat)
7874                         return -ENOBUFS;
7875                 pat_len = wowlan->patterns[i].pattern_len;
7876                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
7877                             wowlan->patterns[i].mask) ||
7878                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
7879                             wowlan->patterns[i].pattern) ||
7880                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
7881                                 wowlan->patterns[i].pkt_offset))
7882                         return -ENOBUFS;
7883                 nla_nest_end(msg, nl_pat);
7884         }
7885         nla_nest_end(msg, nl_pats);
7886
7887         return 0;
7888 }
7889
7890 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7891                                    struct cfg80211_wowlan_tcp *tcp)
7892 {
7893         struct nlattr *nl_tcp;
7894
7895         if (!tcp)
7896                 return 0;
7897
7898         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7899         if (!nl_tcp)
7900                 return -ENOBUFS;
7901
7902         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7903             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7904             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7905             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7906             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7907             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7908                     tcp->payload_len, tcp->payload) ||
7909             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7910                         tcp->data_interval) ||
7911             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7912                     tcp->wake_len, tcp->wake_data) ||
7913             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7914                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7915                 return -ENOBUFS;
7916
7917         if (tcp->payload_seq.len &&
7918             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7919                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7920                 return -ENOBUFS;
7921
7922         if (tcp->payload_tok.len &&
7923             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7924                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7925                     &tcp->payload_tok))
7926                 return -ENOBUFS;
7927
7928         nla_nest_end(msg, nl_tcp);
7929
7930         return 0;
7931 }
7932
7933 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7934 {
7935         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7936         struct sk_buff *msg;
7937         void *hdr;
7938         u32 size = NLMSG_DEFAULT_SIZE;
7939
7940         if (!rdev->wiphy.wowlan)
7941                 return -EOPNOTSUPP;
7942
7943         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7944                 /* adjust size to have room for all the data */
7945                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7946                         rdev->wiphy.wowlan_config->tcp->payload_len +
7947                         rdev->wiphy.wowlan_config->tcp->wake_len +
7948                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7949         }
7950
7951         msg = nlmsg_new(size, GFP_KERNEL);
7952         if (!msg)
7953                 return -ENOMEM;
7954
7955         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7956                              NL80211_CMD_GET_WOWLAN);
7957         if (!hdr)
7958                 goto nla_put_failure;
7959
7960         if (rdev->wiphy.wowlan_config) {
7961                 struct nlattr *nl_wowlan;
7962
7963                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7964                 if (!nl_wowlan)
7965                         goto nla_put_failure;
7966
7967                 if ((rdev->wiphy.wowlan_config->any &&
7968                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7969                     (rdev->wiphy.wowlan_config->disconnect &&
7970                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7971                     (rdev->wiphy.wowlan_config->magic_pkt &&
7972                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7973                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7974                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7975                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7976                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7977                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7978                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7979                     (rdev->wiphy.wowlan_config->rfkill_release &&
7980                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7981                         goto nla_put_failure;
7982
7983                 if (nl80211_send_wowlan_patterns(msg, rdev))
7984                         goto nla_put_failure;
7985
7986                 if (nl80211_send_wowlan_tcp(msg,
7987                                             rdev->wiphy.wowlan_config->tcp))
7988                         goto nla_put_failure;
7989
7990                 nla_nest_end(msg, nl_wowlan);
7991         }
7992
7993         genlmsg_end(msg, hdr);
7994         return genlmsg_reply(msg, info);
7995
7996 nla_put_failure:
7997         nlmsg_free(msg);
7998         return -ENOBUFS;
7999 }
8000
8001 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8002                                     struct nlattr *attr,
8003                                     struct cfg80211_wowlan *trig)
8004 {
8005         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8006         struct cfg80211_wowlan_tcp *cfg;
8007         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8008         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8009         u32 size;
8010         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8011         int err, port;
8012
8013         if (!rdev->wiphy.wowlan->tcp)
8014                 return -EINVAL;
8015
8016         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8017                         nla_data(attr), nla_len(attr),
8018                         nl80211_wowlan_tcp_policy);
8019         if (err)
8020                 return err;
8021
8022         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8023             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8024             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8025             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8026             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8027             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8028             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8029             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8030                 return -EINVAL;
8031
8032         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8033         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8034                 return -EINVAL;
8035
8036         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8037                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8038             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8039                 return -EINVAL;
8040
8041         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8042         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8043                 return -EINVAL;
8044
8045         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8046         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8047                 return -EINVAL;
8048
8049         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8050                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8051
8052                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8053                 tokens_size = tokln - sizeof(*tok);
8054
8055                 if (!tok->len || tokens_size % tok->len)
8056                         return -EINVAL;
8057                 if (!rdev->wiphy.wowlan->tcp->tok)
8058                         return -EINVAL;
8059                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8060                         return -EINVAL;
8061                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8062                         return -EINVAL;
8063                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8064                         return -EINVAL;
8065                 if (tok->offset + tok->len > data_size)
8066                         return -EINVAL;
8067         }
8068
8069         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8070                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8071                 if (!rdev->wiphy.wowlan->tcp->seq)
8072                         return -EINVAL;
8073                 if (seq->len == 0 || seq->len > 4)
8074                         return -EINVAL;
8075                 if (seq->len + seq->offset > data_size)
8076                         return -EINVAL;
8077         }
8078
8079         size = sizeof(*cfg);
8080         size += data_size;
8081         size += wake_size + wake_mask_size;
8082         size += tokens_size;
8083
8084         cfg = kzalloc(size, GFP_KERNEL);
8085         if (!cfg)
8086                 return -ENOMEM;
8087         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8088         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8089         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8090                ETH_ALEN);
8091         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8092                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8093         else
8094                 port = 0;
8095 #ifdef CONFIG_INET
8096         /* allocate a socket and port for it and use it */
8097         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8098                             IPPROTO_TCP, &cfg->sock, 1);
8099         if (err) {
8100                 kfree(cfg);
8101                 return err;
8102         }
8103         if (inet_csk_get_port(cfg->sock->sk, port)) {
8104                 sock_release(cfg->sock);
8105                 kfree(cfg);
8106                 return -EADDRINUSE;
8107         }
8108         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8109 #else
8110         if (!port) {
8111                 kfree(cfg);
8112                 return -EINVAL;
8113         }
8114         cfg->src_port = port;
8115 #endif
8116
8117         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8118         cfg->payload_len = data_size;
8119         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8120         memcpy((void *)cfg->payload,
8121                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8122                data_size);
8123         if (seq)
8124                 cfg->payload_seq = *seq;
8125         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8126         cfg->wake_len = wake_size;
8127         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8128         memcpy((void *)cfg->wake_data,
8129                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8130                wake_size);
8131         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8132                          data_size + wake_size;
8133         memcpy((void *)cfg->wake_mask,
8134                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8135                wake_mask_size);
8136         if (tok) {
8137                 cfg->tokens_size = tokens_size;
8138                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8139         }
8140
8141         trig->tcp = cfg;
8142
8143         return 0;
8144 }
8145
8146 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8147 {
8148         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8149         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8150         struct cfg80211_wowlan new_triggers = {};
8151         struct cfg80211_wowlan *ntrig;
8152         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8153         int err, i;
8154         bool prev_enabled = rdev->wiphy.wowlan_config;
8155
8156         if (!wowlan)
8157                 return -EOPNOTSUPP;
8158
8159         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8160                 cfg80211_rdev_free_wowlan(rdev);
8161                 rdev->wiphy.wowlan_config = NULL;
8162                 goto set_wakeup;
8163         }
8164
8165         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8166                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8167                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8168                         nl80211_wowlan_policy);
8169         if (err)
8170                 return err;
8171
8172         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8173                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8174                         return -EINVAL;
8175                 new_triggers.any = true;
8176         }
8177
8178         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8179                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8180                         return -EINVAL;
8181                 new_triggers.disconnect = true;
8182         }
8183
8184         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8185                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8186                         return -EINVAL;
8187                 new_triggers.magic_pkt = true;
8188         }
8189
8190         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8191                 return -EINVAL;
8192
8193         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8194                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8195                         return -EINVAL;
8196                 new_triggers.gtk_rekey_failure = true;
8197         }
8198
8199         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8200                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8201                         return -EINVAL;
8202                 new_triggers.eap_identity_req = true;
8203         }
8204
8205         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8206                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8207                         return -EINVAL;
8208                 new_triggers.four_way_handshake = true;
8209         }
8210
8211         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8212                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8213                         return -EINVAL;
8214                 new_triggers.rfkill_release = true;
8215         }
8216
8217         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8218                 struct nlattr *pat;
8219                 int n_patterns = 0;
8220                 int rem, pat_len, mask_len, pkt_offset;
8221                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8222
8223                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8224                                     rem)
8225                         n_patterns++;
8226                 if (n_patterns > wowlan->n_patterns)
8227                         return -EINVAL;
8228
8229                 new_triggers.patterns = kcalloc(n_patterns,
8230                                                 sizeof(new_triggers.patterns[0]),
8231                                                 GFP_KERNEL);
8232                 if (!new_triggers.patterns)
8233                         return -ENOMEM;
8234
8235                 new_triggers.n_patterns = n_patterns;
8236                 i = 0;
8237
8238                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8239                                     rem) {
8240                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8241                                   nla_len(pat), NULL);
8242                         err = -EINVAL;
8243                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8244                             !pat_tb[NL80211_PKTPAT_PATTERN])
8245                                 goto error;
8246                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8247                         mask_len = DIV_ROUND_UP(pat_len, 8);
8248                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8249                                 goto error;
8250                         if (pat_len > wowlan->pattern_max_len ||
8251                             pat_len < wowlan->pattern_min_len)
8252                                 goto error;
8253
8254                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8255                                 pkt_offset = 0;
8256                         else
8257                                 pkt_offset = nla_get_u32(
8258                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8259                         if (pkt_offset > wowlan->max_pkt_offset)
8260                                 goto error;
8261                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8262
8263                         new_triggers.patterns[i].mask =
8264                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
8265                         if (!new_triggers.patterns[i].mask) {
8266                                 err = -ENOMEM;
8267                                 goto error;
8268                         }
8269                         new_triggers.patterns[i].pattern =
8270                                 new_triggers.patterns[i].mask + mask_len;
8271                         memcpy(new_triggers.patterns[i].mask,
8272                                nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8273                                mask_len);
8274                         new_triggers.patterns[i].pattern_len = pat_len;
8275                         memcpy(new_triggers.patterns[i].pattern,
8276                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8277                                pat_len);
8278                         i++;
8279                 }
8280         }
8281
8282         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8283                 err = nl80211_parse_wowlan_tcp(
8284                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8285                         &new_triggers);
8286                 if (err)
8287                         goto error;
8288         }
8289
8290         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8291         if (!ntrig) {
8292                 err = -ENOMEM;
8293                 goto error;
8294         }
8295         cfg80211_rdev_free_wowlan(rdev);
8296         rdev->wiphy.wowlan_config = ntrig;
8297
8298  set_wakeup:
8299         if (rdev->ops->set_wakeup &&
8300             prev_enabled != !!rdev->wiphy.wowlan_config)
8301                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8302
8303         return 0;
8304  error:
8305         for (i = 0; i < new_triggers.n_patterns; i++)
8306                 kfree(new_triggers.patterns[i].mask);
8307         kfree(new_triggers.patterns);
8308         if (new_triggers.tcp && new_triggers.tcp->sock)
8309                 sock_release(new_triggers.tcp->sock);
8310         kfree(new_triggers.tcp);
8311         return err;
8312 }
8313 #endif
8314
8315 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8316                                        struct cfg80211_registered_device *rdev)
8317 {
8318         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8319         int i, j, pat_len;
8320         struct cfg80211_coalesce_rules *rule;
8321
8322         if (!rdev->coalesce->n_rules)
8323                 return 0;
8324
8325         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8326         if (!nl_rules)
8327                 return -ENOBUFS;
8328
8329         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8330                 nl_rule = nla_nest_start(msg, i + 1);
8331                 if (!nl_rule)
8332                         return -ENOBUFS;
8333
8334                 rule = &rdev->coalesce->rules[i];
8335                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8336                                 rule->delay))
8337                         return -ENOBUFS;
8338
8339                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8340                                 rule->condition))
8341                         return -ENOBUFS;
8342
8343                 nl_pats = nla_nest_start(msg,
8344                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8345                 if (!nl_pats)
8346                         return -ENOBUFS;
8347
8348                 for (j = 0; j < rule->n_patterns; j++) {
8349                         nl_pat = nla_nest_start(msg, j + 1);
8350                         if (!nl_pat)
8351                                 return -ENOBUFS;
8352                         pat_len = rule->patterns[j].pattern_len;
8353                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8354                                     DIV_ROUND_UP(pat_len, 8),
8355                                     rule->patterns[j].mask) ||
8356                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8357                                     rule->patterns[j].pattern) ||
8358                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8359                                         rule->patterns[j].pkt_offset))
8360                                 return -ENOBUFS;
8361                         nla_nest_end(msg, nl_pat);
8362                 }
8363                 nla_nest_end(msg, nl_pats);
8364                 nla_nest_end(msg, nl_rule);
8365         }
8366         nla_nest_end(msg, nl_rules);
8367
8368         return 0;
8369 }
8370
8371 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8372 {
8373         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8374         struct sk_buff *msg;
8375         void *hdr;
8376
8377         if (!rdev->wiphy.coalesce)
8378                 return -EOPNOTSUPP;
8379
8380         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8381         if (!msg)
8382                 return -ENOMEM;
8383
8384         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8385                              NL80211_CMD_GET_COALESCE);
8386         if (!hdr)
8387                 goto nla_put_failure;
8388
8389         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8390                 goto nla_put_failure;
8391
8392         genlmsg_end(msg, hdr);
8393         return genlmsg_reply(msg, info);
8394
8395 nla_put_failure:
8396         nlmsg_free(msg);
8397         return -ENOBUFS;
8398 }
8399
8400 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8401 {
8402         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8403         int i, j;
8404         struct cfg80211_coalesce_rules *rule;
8405
8406         if (!coalesce)
8407                 return;
8408
8409         for (i = 0; i < coalesce->n_rules; i++) {
8410                 rule = &coalesce->rules[i];
8411                 for (j = 0; j < rule->n_patterns; j++)
8412                         kfree(rule->patterns[j].mask);
8413                 kfree(rule->patterns);
8414         }
8415         kfree(coalesce->rules);
8416         kfree(coalesce);
8417         rdev->coalesce = NULL;
8418 }
8419
8420 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8421                                        struct nlattr *rule,
8422                                        struct cfg80211_coalesce_rules *new_rule)
8423 {
8424         int err, i;
8425         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8426         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8427         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8428         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8429
8430         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8431                         nla_len(rule), nl80211_coalesce_policy);
8432         if (err)
8433                 return err;
8434
8435         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8436                 new_rule->delay =
8437                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8438         if (new_rule->delay > coalesce->max_delay)
8439                 return -EINVAL;
8440
8441         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8442                 new_rule->condition =
8443                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8444         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8445             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8446                 return -EINVAL;
8447
8448         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8449                 return -EINVAL;
8450
8451         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8452                             rem)
8453                 n_patterns++;
8454         if (n_patterns > coalesce->n_patterns)
8455                 return -EINVAL;
8456
8457         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8458                                      GFP_KERNEL);
8459         if (!new_rule->patterns)
8460                 return -ENOMEM;
8461
8462         new_rule->n_patterns = n_patterns;
8463         i = 0;
8464
8465         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8466                             rem) {
8467                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8468                           nla_len(pat), NULL);
8469                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8470                     !pat_tb[NL80211_PKTPAT_PATTERN])
8471                         return -EINVAL;
8472                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8473                 mask_len = DIV_ROUND_UP(pat_len, 8);
8474                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8475                         return -EINVAL;
8476                 if (pat_len > coalesce->pattern_max_len ||
8477                     pat_len < coalesce->pattern_min_len)
8478                         return -EINVAL;
8479
8480                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8481                         pkt_offset = 0;
8482                 else
8483                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8484                 if (pkt_offset > coalesce->max_pkt_offset)
8485                         return -EINVAL;
8486                 new_rule->patterns[i].pkt_offset = pkt_offset;
8487
8488                 new_rule->patterns[i].mask =
8489                         kmalloc(mask_len + pat_len, GFP_KERNEL);
8490                 if (!new_rule->patterns[i].mask)
8491                         return -ENOMEM;
8492                 new_rule->patterns[i].pattern =
8493                         new_rule->patterns[i].mask + mask_len;
8494                 memcpy(new_rule->patterns[i].mask,
8495                        nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
8496                 new_rule->patterns[i].pattern_len = pat_len;
8497                 memcpy(new_rule->patterns[i].pattern,
8498                        nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
8499                 i++;
8500         }
8501
8502         return 0;
8503 }
8504
8505 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8506 {
8507         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8508         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8509         struct cfg80211_coalesce new_coalesce = {};
8510         struct cfg80211_coalesce *n_coalesce;
8511         int err, rem_rule, n_rules = 0, i, j;
8512         struct nlattr *rule;
8513         struct cfg80211_coalesce_rules *tmp_rule;
8514
8515         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8516                 return -EOPNOTSUPP;
8517
8518         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8519                 cfg80211_rdev_free_coalesce(rdev);
8520                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8521                 return 0;
8522         }
8523
8524         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8525                             rem_rule)
8526                 n_rules++;
8527         if (n_rules > coalesce->n_rules)
8528                 return -EINVAL;
8529
8530         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8531                                      GFP_KERNEL);
8532         if (!new_coalesce.rules)
8533                 return -ENOMEM;
8534
8535         new_coalesce.n_rules = n_rules;
8536         i = 0;
8537
8538         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8539                             rem_rule) {
8540                 err = nl80211_parse_coalesce_rule(rdev, rule,
8541                                                   &new_coalesce.rules[i]);
8542                 if (err)
8543                         goto error;
8544
8545                 i++;
8546         }
8547
8548         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8549         if (err)
8550                 goto error;
8551
8552         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8553         if (!n_coalesce) {
8554                 err = -ENOMEM;
8555                 goto error;
8556         }
8557         cfg80211_rdev_free_coalesce(rdev);
8558         rdev->coalesce = n_coalesce;
8559
8560         return 0;
8561 error:
8562         for (i = 0; i < new_coalesce.n_rules; i++) {
8563                 tmp_rule = &new_coalesce.rules[i];
8564                 for (j = 0; j < tmp_rule->n_patterns; j++)
8565                         kfree(tmp_rule->patterns[j].mask);
8566                 kfree(tmp_rule->patterns);
8567         }
8568         kfree(new_coalesce.rules);
8569
8570         return err;
8571 }
8572
8573 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8574 {
8575         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8576         struct net_device *dev = info->user_ptr[1];
8577         struct wireless_dev *wdev = dev->ieee80211_ptr;
8578         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8579         struct cfg80211_gtk_rekey_data rekey_data;
8580         int err;
8581
8582         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8583                 return -EINVAL;
8584
8585         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8586                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8587                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8588                         nl80211_rekey_policy);
8589         if (err)
8590                 return err;
8591
8592         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8593                 return -ERANGE;
8594         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8595                 return -ERANGE;
8596         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8597                 return -ERANGE;
8598
8599         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8600                NL80211_KEK_LEN);
8601         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8602                NL80211_KCK_LEN);
8603         memcpy(rekey_data.replay_ctr,
8604                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8605                NL80211_REPLAY_CTR_LEN);
8606
8607         wdev_lock(wdev);
8608         if (!wdev->current_bss) {
8609                 err = -ENOTCONN;
8610                 goto out;
8611         }
8612
8613         if (!rdev->ops->set_rekey_data) {
8614                 err = -EOPNOTSUPP;
8615                 goto out;
8616         }
8617
8618         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8619  out:
8620         wdev_unlock(wdev);
8621         return err;
8622 }
8623
8624 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8625                                              struct genl_info *info)
8626 {
8627         struct net_device *dev = info->user_ptr[1];
8628         struct wireless_dev *wdev = dev->ieee80211_ptr;
8629
8630         if (wdev->iftype != NL80211_IFTYPE_AP &&
8631             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8632                 return -EINVAL;
8633
8634         if (wdev->ap_unexpected_nlportid)
8635                 return -EBUSY;
8636
8637         wdev->ap_unexpected_nlportid = info->snd_portid;
8638         return 0;
8639 }
8640
8641 static int nl80211_probe_client(struct sk_buff *skb,
8642                                 struct genl_info *info)
8643 {
8644         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8645         struct net_device *dev = info->user_ptr[1];
8646         struct wireless_dev *wdev = dev->ieee80211_ptr;
8647         struct sk_buff *msg;
8648         void *hdr;
8649         const u8 *addr;
8650         u64 cookie;
8651         int err;
8652
8653         if (wdev->iftype != NL80211_IFTYPE_AP &&
8654             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8655                 return -EOPNOTSUPP;
8656
8657         if (!info->attrs[NL80211_ATTR_MAC])
8658                 return -EINVAL;
8659
8660         if (!rdev->ops->probe_client)
8661                 return -EOPNOTSUPP;
8662
8663         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8664         if (!msg)
8665                 return -ENOMEM;
8666
8667         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8668                              NL80211_CMD_PROBE_CLIENT);
8669         if (!hdr) {
8670                 err = -ENOBUFS;
8671                 goto free_msg;
8672         }
8673
8674         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8675
8676         err = rdev_probe_client(rdev, dev, addr, &cookie);
8677         if (err)
8678                 goto free_msg;
8679
8680         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8681                 goto nla_put_failure;
8682
8683         genlmsg_end(msg, hdr);
8684
8685         return genlmsg_reply(msg, info);
8686
8687  nla_put_failure:
8688         err = -ENOBUFS;
8689  free_msg:
8690         nlmsg_free(msg);
8691         return err;
8692 }
8693
8694 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8695 {
8696         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8697         struct cfg80211_beacon_registration *reg, *nreg;
8698         int rv;
8699
8700         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8701                 return -EOPNOTSUPP;
8702
8703         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8704         if (!nreg)
8705                 return -ENOMEM;
8706
8707         /* First, check if already registered. */
8708         spin_lock_bh(&rdev->beacon_registrations_lock);
8709         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8710                 if (reg->nlportid == info->snd_portid) {
8711                         rv = -EALREADY;
8712                         goto out_err;
8713                 }
8714         }
8715         /* Add it to the list */
8716         nreg->nlportid = info->snd_portid;
8717         list_add(&nreg->list, &rdev->beacon_registrations);
8718
8719         spin_unlock_bh(&rdev->beacon_registrations_lock);
8720
8721         return 0;
8722 out_err:
8723         spin_unlock_bh(&rdev->beacon_registrations_lock);
8724         kfree(nreg);
8725         return rv;
8726 }
8727
8728 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8729 {
8730         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8731         struct wireless_dev *wdev = info->user_ptr[1];
8732         int err;
8733
8734         if (!rdev->ops->start_p2p_device)
8735                 return -EOPNOTSUPP;
8736
8737         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8738                 return -EOPNOTSUPP;
8739
8740         if (wdev->p2p_started)
8741                 return 0;
8742
8743         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8744         if (err)
8745                 return err;
8746
8747         err = rdev_start_p2p_device(rdev, wdev);
8748         if (err)
8749                 return err;
8750
8751         wdev->p2p_started = true;
8752         rdev->opencount++;
8753
8754         return 0;
8755 }
8756
8757 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8758 {
8759         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8760         struct wireless_dev *wdev = info->user_ptr[1];
8761
8762         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8763                 return -EOPNOTSUPP;
8764
8765         if (!rdev->ops->stop_p2p_device)
8766                 return -EOPNOTSUPP;
8767
8768         cfg80211_stop_p2p_device(rdev, wdev);
8769
8770         return 0;
8771 }
8772
8773 static int nl80211_get_protocol_features(struct sk_buff *skb,
8774                                          struct genl_info *info)
8775 {
8776         void *hdr;
8777         struct sk_buff *msg;
8778
8779         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8780         if (!msg)
8781                 return -ENOMEM;
8782
8783         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8784                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8785         if (!hdr)
8786                 goto nla_put_failure;
8787
8788         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8789                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8790                 goto nla_put_failure;
8791
8792         genlmsg_end(msg, hdr);
8793         return genlmsg_reply(msg, info);
8794
8795  nla_put_failure:
8796         kfree_skb(msg);
8797         return -ENOBUFS;
8798 }
8799
8800 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8801 {
8802         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8803         struct cfg80211_update_ft_ies_params ft_params;
8804         struct net_device *dev = info->user_ptr[1];
8805
8806         if (!rdev->ops->update_ft_ies)
8807                 return -EOPNOTSUPP;
8808
8809         if (!info->attrs[NL80211_ATTR_MDID] ||
8810             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8811                 return -EINVAL;
8812
8813         memset(&ft_params, 0, sizeof(ft_params));
8814         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8815         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8816         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8817
8818         return rdev_update_ft_ies(rdev, dev, &ft_params);
8819 }
8820
8821 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8822                                        struct genl_info *info)
8823 {
8824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8825         struct wireless_dev *wdev = info->user_ptr[1];
8826         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8827         u16 duration;
8828         int ret;
8829
8830         if (!rdev->ops->crit_proto_start)
8831                 return -EOPNOTSUPP;
8832
8833         if (WARN_ON(!rdev->ops->crit_proto_stop))
8834                 return -EINVAL;
8835
8836         if (rdev->crit_proto_nlportid)
8837                 return -EBUSY;
8838
8839         /* determine protocol if provided */
8840         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8841                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8842
8843         if (proto >= NUM_NL80211_CRIT_PROTO)
8844                 return -EINVAL;
8845
8846         /* timeout must be provided */
8847         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8848                 return -EINVAL;
8849
8850         duration =
8851                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8852
8853         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8854                 return -ERANGE;
8855
8856         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8857         if (!ret)
8858                 rdev->crit_proto_nlportid = info->snd_portid;
8859
8860         return ret;
8861 }
8862
8863 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8864                                       struct genl_info *info)
8865 {
8866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8867         struct wireless_dev *wdev = info->user_ptr[1];
8868
8869         if (!rdev->ops->crit_proto_stop)
8870                 return -EOPNOTSUPP;
8871
8872         if (rdev->crit_proto_nlportid) {
8873                 rdev->crit_proto_nlportid = 0;
8874                 rdev_crit_proto_stop(rdev, wdev);
8875         }
8876         return 0;
8877 }
8878
8879 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
8880 {
8881         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8882         struct wireless_dev *wdev =
8883                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8884         int i, err;
8885         u32 vid, subcmd;
8886
8887         if (!rdev->wiphy.vendor_commands)
8888                 return -EOPNOTSUPP;
8889
8890         if (IS_ERR(wdev)) {
8891                 err = PTR_ERR(wdev);
8892                 if (err != -EINVAL)
8893                         return err;
8894                 wdev = NULL;
8895         } else if (wdev->wiphy != &rdev->wiphy) {
8896                 return -EINVAL;
8897         }
8898
8899         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
8900             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
8901                 return -EINVAL;
8902
8903         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
8904         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
8905         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
8906                 const struct wiphy_vendor_command *vcmd;
8907                 void *data = NULL;
8908                 int len = 0;
8909
8910                 vcmd = &rdev->wiphy.vendor_commands[i];
8911
8912                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
8913                         continue;
8914
8915                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
8916                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
8917                         if (!wdev)
8918                                 return -EINVAL;
8919                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
8920                             !wdev->netdev)
8921                                 return -EINVAL;
8922
8923                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
8924                                 if (wdev->netdev &&
8925                                     !netif_running(wdev->netdev))
8926                                         return -ENETDOWN;
8927                                 if (!wdev->netdev && !wdev->p2p_started)
8928                                         return -ENETDOWN;
8929                         }
8930                 } else {
8931                         wdev = NULL;
8932                 }
8933
8934                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
8935                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
8936                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
8937                 }
8938
8939                 rdev->cur_cmd_info = info;
8940                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
8941                                                           data, len);
8942                 rdev->cur_cmd_info = NULL;
8943                 return err;
8944         }
8945
8946         return -EOPNOTSUPP;
8947 }
8948
8949 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
8950                                            enum nl80211_commands cmd,
8951                                            enum nl80211_attrs attr,
8952                                            int approxlen)
8953 {
8954         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8955
8956         if (WARN_ON(!rdev->cur_cmd_info))
8957                 return NULL;
8958
8959         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
8960                                            rdev->cur_cmd_info->snd_portid,
8961                                            rdev->cur_cmd_info->snd_seq,
8962                                            cmd, attr, GFP_KERNEL);
8963 }
8964 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
8965
8966 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
8967 {
8968         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8969         void *hdr = ((void **)skb->cb)[1];
8970         struct nlattr *data = ((void **)skb->cb)[2];
8971
8972         if (WARN_ON(!rdev->cur_cmd_info)) {
8973                 kfree_skb(skb);
8974                 return -EINVAL;
8975         }
8976
8977         nla_nest_end(skb, data);
8978         genlmsg_end(skb, hdr);
8979         return genlmsg_reply(skb, rdev->cur_cmd_info);
8980 }
8981 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
8982
8983
8984 #define NL80211_FLAG_NEED_WIPHY         0x01
8985 #define NL80211_FLAG_NEED_NETDEV        0x02
8986 #define NL80211_FLAG_NEED_RTNL          0x04
8987 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8988 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8989                                          NL80211_FLAG_CHECK_NETDEV_UP)
8990 #define NL80211_FLAG_NEED_WDEV          0x10
8991 /* If a netdev is associated, it must be UP, P2P must be started */
8992 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8993                                          NL80211_FLAG_CHECK_NETDEV_UP)
8994
8995 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
8996                             struct genl_info *info)
8997 {
8998         struct cfg80211_registered_device *rdev;
8999         struct wireless_dev *wdev;
9000         struct net_device *dev;
9001         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
9002
9003         if (rtnl)
9004                 rtnl_lock();
9005
9006         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
9007                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
9008                 if (IS_ERR(rdev)) {
9009                         if (rtnl)
9010                                 rtnl_unlock();
9011                         return PTR_ERR(rdev);
9012                 }
9013                 info->user_ptr[0] = rdev;
9014         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
9015                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9016                 ASSERT_RTNL();
9017
9018                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
9019                                                   info->attrs);
9020                 if (IS_ERR(wdev)) {
9021                         if (rtnl)
9022                                 rtnl_unlock();
9023                         return PTR_ERR(wdev);
9024                 }
9025
9026                 dev = wdev->netdev;
9027                 rdev = wiphy_to_dev(wdev->wiphy);
9028
9029                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
9030                         if (!dev) {
9031                                 if (rtnl)
9032                                         rtnl_unlock();
9033                                 return -EINVAL;
9034                         }
9035
9036                         info->user_ptr[1] = dev;
9037                 } else {
9038                         info->user_ptr[1] = wdev;
9039                 }
9040
9041                 if (dev) {
9042                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
9043                             !netif_running(dev)) {
9044                                 if (rtnl)
9045                                         rtnl_unlock();
9046                                 return -ENETDOWN;
9047                         }
9048
9049                         dev_hold(dev);
9050                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
9051                         if (!wdev->p2p_started) {
9052                                 if (rtnl)
9053                                         rtnl_unlock();
9054                                 return -ENETDOWN;
9055                         }
9056                 }
9057
9058                 info->user_ptr[0] = rdev;
9059         }
9060
9061         return 0;
9062 }
9063
9064 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
9065                               struct genl_info *info)
9066 {
9067         if (info->user_ptr[1]) {
9068                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9069                         struct wireless_dev *wdev = info->user_ptr[1];
9070
9071                         if (wdev->netdev)
9072                                 dev_put(wdev->netdev);
9073                 } else {
9074                         dev_put(info->user_ptr[1]);
9075                 }
9076         }
9077         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
9078                 rtnl_unlock();
9079 }
9080
9081 static const struct genl_ops nl80211_ops[] = {
9082         {
9083                 .cmd = NL80211_CMD_GET_WIPHY,
9084                 .doit = nl80211_get_wiphy,
9085                 .dumpit = nl80211_dump_wiphy,
9086                 .done = nl80211_dump_wiphy_done,
9087                 .policy = nl80211_policy,
9088                 /* can be retrieved by unprivileged users */
9089                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9090                                   NL80211_FLAG_NEED_RTNL,
9091         },
9092         {
9093                 .cmd = NL80211_CMD_SET_WIPHY,
9094                 .doit = nl80211_set_wiphy,
9095                 .policy = nl80211_policy,
9096                 .flags = GENL_ADMIN_PERM,
9097                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9098         },
9099         {
9100                 .cmd = NL80211_CMD_GET_INTERFACE,
9101                 .doit = nl80211_get_interface,
9102                 .dumpit = nl80211_dump_interface,
9103                 .policy = nl80211_policy,
9104                 /* can be retrieved by unprivileged users */
9105                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9106                                   NL80211_FLAG_NEED_RTNL,
9107         },
9108         {
9109                 .cmd = NL80211_CMD_SET_INTERFACE,
9110                 .doit = nl80211_set_interface,
9111                 .policy = nl80211_policy,
9112                 .flags = GENL_ADMIN_PERM,
9113                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9114                                   NL80211_FLAG_NEED_RTNL,
9115         },
9116         {
9117                 .cmd = NL80211_CMD_NEW_INTERFACE,
9118                 .doit = nl80211_new_interface,
9119                 .policy = nl80211_policy,
9120                 .flags = GENL_ADMIN_PERM,
9121                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9122                                   NL80211_FLAG_NEED_RTNL,
9123         },
9124         {
9125                 .cmd = NL80211_CMD_DEL_INTERFACE,
9126                 .doit = nl80211_del_interface,
9127                 .policy = nl80211_policy,
9128                 .flags = GENL_ADMIN_PERM,
9129                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9130                                   NL80211_FLAG_NEED_RTNL,
9131         },
9132         {
9133                 .cmd = NL80211_CMD_GET_KEY,
9134                 .doit = nl80211_get_key,
9135                 .policy = nl80211_policy,
9136                 .flags = GENL_ADMIN_PERM,
9137                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9138                                   NL80211_FLAG_NEED_RTNL,
9139         },
9140         {
9141                 .cmd = NL80211_CMD_SET_KEY,
9142                 .doit = nl80211_set_key,
9143                 .policy = nl80211_policy,
9144                 .flags = GENL_ADMIN_PERM,
9145                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9146                                   NL80211_FLAG_NEED_RTNL,
9147         },
9148         {
9149                 .cmd = NL80211_CMD_NEW_KEY,
9150                 .doit = nl80211_new_key,
9151                 .policy = nl80211_policy,
9152                 .flags = GENL_ADMIN_PERM,
9153                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9154                                   NL80211_FLAG_NEED_RTNL,
9155         },
9156         {
9157                 .cmd = NL80211_CMD_DEL_KEY,
9158                 .doit = nl80211_del_key,
9159                 .policy = nl80211_policy,
9160                 .flags = GENL_ADMIN_PERM,
9161                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9162                                   NL80211_FLAG_NEED_RTNL,
9163         },
9164         {
9165                 .cmd = NL80211_CMD_SET_BEACON,
9166                 .policy = nl80211_policy,
9167                 .flags = GENL_ADMIN_PERM,
9168                 .doit = nl80211_set_beacon,
9169                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9170                                   NL80211_FLAG_NEED_RTNL,
9171         },
9172         {
9173                 .cmd = NL80211_CMD_START_AP,
9174                 .policy = nl80211_policy,
9175                 .flags = GENL_ADMIN_PERM,
9176                 .doit = nl80211_start_ap,
9177                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9178                                   NL80211_FLAG_NEED_RTNL,
9179         },
9180         {
9181                 .cmd = NL80211_CMD_STOP_AP,
9182                 .policy = nl80211_policy,
9183                 .flags = GENL_ADMIN_PERM,
9184                 .doit = nl80211_stop_ap,
9185                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9186                                   NL80211_FLAG_NEED_RTNL,
9187         },
9188         {
9189                 .cmd = NL80211_CMD_GET_STATION,
9190                 .doit = nl80211_get_station,
9191                 .dumpit = nl80211_dump_station,
9192                 .policy = nl80211_policy,
9193                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9194                                   NL80211_FLAG_NEED_RTNL,
9195         },
9196         {
9197                 .cmd = NL80211_CMD_SET_STATION,
9198                 .doit = nl80211_set_station,
9199                 .policy = nl80211_policy,
9200                 .flags = GENL_ADMIN_PERM,
9201                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9202                                   NL80211_FLAG_NEED_RTNL,
9203         },
9204         {
9205                 .cmd = NL80211_CMD_NEW_STATION,
9206                 .doit = nl80211_new_station,
9207                 .policy = nl80211_policy,
9208                 .flags = GENL_ADMIN_PERM,
9209                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9210                                   NL80211_FLAG_NEED_RTNL,
9211         },
9212         {
9213                 .cmd = NL80211_CMD_DEL_STATION,
9214                 .doit = nl80211_del_station,
9215                 .policy = nl80211_policy,
9216                 .flags = GENL_ADMIN_PERM,
9217                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9218                                   NL80211_FLAG_NEED_RTNL,
9219         },
9220         {
9221                 .cmd = NL80211_CMD_GET_MPATH,
9222                 .doit = nl80211_get_mpath,
9223                 .dumpit = nl80211_dump_mpath,
9224                 .policy = nl80211_policy,
9225                 .flags = GENL_ADMIN_PERM,
9226                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9227                                   NL80211_FLAG_NEED_RTNL,
9228         },
9229         {
9230                 .cmd = NL80211_CMD_SET_MPATH,
9231                 .doit = nl80211_set_mpath,
9232                 .policy = nl80211_policy,
9233                 .flags = GENL_ADMIN_PERM,
9234                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9235                                   NL80211_FLAG_NEED_RTNL,
9236         },
9237         {
9238                 .cmd = NL80211_CMD_NEW_MPATH,
9239                 .doit = nl80211_new_mpath,
9240                 .policy = nl80211_policy,
9241                 .flags = GENL_ADMIN_PERM,
9242                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9243                                   NL80211_FLAG_NEED_RTNL,
9244         },
9245         {
9246                 .cmd = NL80211_CMD_DEL_MPATH,
9247                 .doit = nl80211_del_mpath,
9248                 .policy = nl80211_policy,
9249                 .flags = GENL_ADMIN_PERM,
9250                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9251                                   NL80211_FLAG_NEED_RTNL,
9252         },
9253         {
9254                 .cmd = NL80211_CMD_SET_BSS,
9255                 .doit = nl80211_set_bss,
9256                 .policy = nl80211_policy,
9257                 .flags = GENL_ADMIN_PERM,
9258                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9259                                   NL80211_FLAG_NEED_RTNL,
9260         },
9261         {
9262                 .cmd = NL80211_CMD_GET_REG,
9263                 .doit = nl80211_get_reg,
9264                 .policy = nl80211_policy,
9265                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9266                 /* can be retrieved by unprivileged users */
9267         },
9268         {
9269                 .cmd = NL80211_CMD_SET_REG,
9270                 .doit = nl80211_set_reg,
9271                 .policy = nl80211_policy,
9272                 .flags = GENL_ADMIN_PERM,
9273                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9274         },
9275         {
9276                 .cmd = NL80211_CMD_REQ_SET_REG,
9277                 .doit = nl80211_req_set_reg,
9278                 .policy = nl80211_policy,
9279                 .flags = GENL_ADMIN_PERM,
9280         },
9281         {
9282                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9283                 .doit = nl80211_get_mesh_config,
9284                 .policy = nl80211_policy,
9285                 /* can be retrieved by unprivileged users */
9286                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9287                                   NL80211_FLAG_NEED_RTNL,
9288         },
9289         {
9290                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9291                 .doit = nl80211_update_mesh_config,
9292                 .policy = nl80211_policy,
9293                 .flags = GENL_ADMIN_PERM,
9294                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9295                                   NL80211_FLAG_NEED_RTNL,
9296         },
9297         {
9298                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9299                 .doit = nl80211_trigger_scan,
9300                 .policy = nl80211_policy,
9301                 .flags = GENL_ADMIN_PERM,
9302                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9303                                   NL80211_FLAG_NEED_RTNL,
9304         },
9305         {
9306                 .cmd = NL80211_CMD_GET_SCAN,
9307                 .policy = nl80211_policy,
9308                 .dumpit = nl80211_dump_scan,
9309         },
9310         {
9311                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9312                 .doit = nl80211_start_sched_scan,
9313                 .policy = nl80211_policy,
9314                 .flags = GENL_ADMIN_PERM,
9315                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9316                                   NL80211_FLAG_NEED_RTNL,
9317         },
9318         {
9319                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9320                 .doit = nl80211_stop_sched_scan,
9321                 .policy = nl80211_policy,
9322                 .flags = GENL_ADMIN_PERM,
9323                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9324                                   NL80211_FLAG_NEED_RTNL,
9325         },
9326         {
9327                 .cmd = NL80211_CMD_AUTHENTICATE,
9328                 .doit = nl80211_authenticate,
9329                 .policy = nl80211_policy,
9330                 .flags = GENL_ADMIN_PERM,
9331                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9332                                   NL80211_FLAG_NEED_RTNL,
9333         },
9334         {
9335                 .cmd = NL80211_CMD_ASSOCIATE,
9336                 .doit = nl80211_associate,
9337                 .policy = nl80211_policy,
9338                 .flags = GENL_ADMIN_PERM,
9339                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9340                                   NL80211_FLAG_NEED_RTNL,
9341         },
9342         {
9343                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9344                 .doit = nl80211_deauthenticate,
9345                 .policy = nl80211_policy,
9346                 .flags = GENL_ADMIN_PERM,
9347                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9348                                   NL80211_FLAG_NEED_RTNL,
9349         },
9350         {
9351                 .cmd = NL80211_CMD_DISASSOCIATE,
9352                 .doit = nl80211_disassociate,
9353                 .policy = nl80211_policy,
9354                 .flags = GENL_ADMIN_PERM,
9355                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9356                                   NL80211_FLAG_NEED_RTNL,
9357         },
9358         {
9359                 .cmd = NL80211_CMD_JOIN_IBSS,
9360                 .doit = nl80211_join_ibss,
9361                 .policy = nl80211_policy,
9362                 .flags = GENL_ADMIN_PERM,
9363                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9364                                   NL80211_FLAG_NEED_RTNL,
9365         },
9366         {
9367                 .cmd = NL80211_CMD_LEAVE_IBSS,
9368                 .doit = nl80211_leave_ibss,
9369                 .policy = nl80211_policy,
9370                 .flags = GENL_ADMIN_PERM,
9371                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9372                                   NL80211_FLAG_NEED_RTNL,
9373         },
9374 #ifdef CONFIG_NL80211_TESTMODE
9375         {
9376                 .cmd = NL80211_CMD_TESTMODE,
9377                 .doit = nl80211_testmode_do,
9378                 .dumpit = nl80211_testmode_dump,
9379                 .policy = nl80211_policy,
9380                 .flags = GENL_ADMIN_PERM,
9381                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9382                                   NL80211_FLAG_NEED_RTNL,
9383         },
9384 #endif
9385         {
9386                 .cmd = NL80211_CMD_CONNECT,
9387                 .doit = nl80211_connect,
9388                 .policy = nl80211_policy,
9389                 .flags = GENL_ADMIN_PERM,
9390                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9391                                   NL80211_FLAG_NEED_RTNL,
9392         },
9393         {
9394                 .cmd = NL80211_CMD_DISCONNECT,
9395                 .doit = nl80211_disconnect,
9396                 .policy = nl80211_policy,
9397                 .flags = GENL_ADMIN_PERM,
9398                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9399                                   NL80211_FLAG_NEED_RTNL,
9400         },
9401         {
9402                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9403                 .doit = nl80211_wiphy_netns,
9404                 .policy = nl80211_policy,
9405                 .flags = GENL_ADMIN_PERM,
9406                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9407                                   NL80211_FLAG_NEED_RTNL,
9408         },
9409         {
9410                 .cmd = NL80211_CMD_GET_SURVEY,
9411                 .policy = nl80211_policy,
9412                 .dumpit = nl80211_dump_survey,
9413         },
9414         {
9415                 .cmd = NL80211_CMD_SET_PMKSA,
9416                 .doit = nl80211_setdel_pmksa,
9417                 .policy = nl80211_policy,
9418                 .flags = GENL_ADMIN_PERM,
9419                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9420                                   NL80211_FLAG_NEED_RTNL,
9421         },
9422         {
9423                 .cmd = NL80211_CMD_DEL_PMKSA,
9424                 .doit = nl80211_setdel_pmksa,
9425                 .policy = nl80211_policy,
9426                 .flags = GENL_ADMIN_PERM,
9427                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9428                                   NL80211_FLAG_NEED_RTNL,
9429         },
9430         {
9431                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9432                 .doit = nl80211_flush_pmksa,
9433                 .policy = nl80211_policy,
9434                 .flags = GENL_ADMIN_PERM,
9435                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9436                                   NL80211_FLAG_NEED_RTNL,
9437         },
9438         {
9439                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9440                 .doit = nl80211_remain_on_channel,
9441                 .policy = nl80211_policy,
9442                 .flags = GENL_ADMIN_PERM,
9443                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9444                                   NL80211_FLAG_NEED_RTNL,
9445         },
9446         {
9447                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9448                 .doit = nl80211_cancel_remain_on_channel,
9449                 .policy = nl80211_policy,
9450                 .flags = GENL_ADMIN_PERM,
9451                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9452                                   NL80211_FLAG_NEED_RTNL,
9453         },
9454         {
9455                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9456                 .doit = nl80211_set_tx_bitrate_mask,
9457                 .policy = nl80211_policy,
9458                 .flags = GENL_ADMIN_PERM,
9459                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9460                                   NL80211_FLAG_NEED_RTNL,
9461         },
9462         {
9463                 .cmd = NL80211_CMD_REGISTER_FRAME,
9464                 .doit = nl80211_register_mgmt,
9465                 .policy = nl80211_policy,
9466                 .flags = GENL_ADMIN_PERM,
9467                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9468                                   NL80211_FLAG_NEED_RTNL,
9469         },
9470         {
9471                 .cmd = NL80211_CMD_FRAME,
9472                 .doit = nl80211_tx_mgmt,
9473                 .policy = nl80211_policy,
9474                 .flags = GENL_ADMIN_PERM,
9475                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9476                                   NL80211_FLAG_NEED_RTNL,
9477         },
9478         {
9479                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9480                 .doit = nl80211_tx_mgmt_cancel_wait,
9481                 .policy = nl80211_policy,
9482                 .flags = GENL_ADMIN_PERM,
9483                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9484                                   NL80211_FLAG_NEED_RTNL,
9485         },
9486         {
9487                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9488                 .doit = nl80211_set_power_save,
9489                 .policy = nl80211_policy,
9490                 .flags = GENL_ADMIN_PERM,
9491                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9492                                   NL80211_FLAG_NEED_RTNL,
9493         },
9494         {
9495                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9496                 .doit = nl80211_get_power_save,
9497                 .policy = nl80211_policy,
9498                 /* can be retrieved by unprivileged users */
9499                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9500                                   NL80211_FLAG_NEED_RTNL,
9501         },
9502         {
9503                 .cmd = NL80211_CMD_SET_CQM,
9504                 .doit = nl80211_set_cqm,
9505                 .policy = nl80211_policy,
9506                 .flags = GENL_ADMIN_PERM,
9507                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9508                                   NL80211_FLAG_NEED_RTNL,
9509         },
9510         {
9511                 .cmd = NL80211_CMD_SET_CHANNEL,
9512                 .doit = nl80211_set_channel,
9513                 .policy = nl80211_policy,
9514                 .flags = GENL_ADMIN_PERM,
9515                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9516                                   NL80211_FLAG_NEED_RTNL,
9517         },
9518         {
9519                 .cmd = NL80211_CMD_SET_WDS_PEER,
9520                 .doit = nl80211_set_wds_peer,
9521                 .policy = nl80211_policy,
9522                 .flags = GENL_ADMIN_PERM,
9523                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9524                                   NL80211_FLAG_NEED_RTNL,
9525         },
9526         {
9527                 .cmd = NL80211_CMD_JOIN_MESH,
9528                 .doit = nl80211_join_mesh,
9529                 .policy = nl80211_policy,
9530                 .flags = GENL_ADMIN_PERM,
9531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9532                                   NL80211_FLAG_NEED_RTNL,
9533         },
9534         {
9535                 .cmd = NL80211_CMD_LEAVE_MESH,
9536                 .doit = nl80211_leave_mesh,
9537                 .policy = nl80211_policy,
9538                 .flags = GENL_ADMIN_PERM,
9539                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9540                                   NL80211_FLAG_NEED_RTNL,
9541         },
9542 #ifdef CONFIG_PM
9543         {
9544                 .cmd = NL80211_CMD_GET_WOWLAN,
9545                 .doit = nl80211_get_wowlan,
9546                 .policy = nl80211_policy,
9547                 /* can be retrieved by unprivileged users */
9548                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9549                                   NL80211_FLAG_NEED_RTNL,
9550         },
9551         {
9552                 .cmd = NL80211_CMD_SET_WOWLAN,
9553                 .doit = nl80211_set_wowlan,
9554                 .policy = nl80211_policy,
9555                 .flags = GENL_ADMIN_PERM,
9556                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9557                                   NL80211_FLAG_NEED_RTNL,
9558         },
9559 #endif
9560         {
9561                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9562                 .doit = nl80211_set_rekey_data,
9563                 .policy = nl80211_policy,
9564                 .flags = GENL_ADMIN_PERM,
9565                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9566                                   NL80211_FLAG_NEED_RTNL,
9567         },
9568         {
9569                 .cmd = NL80211_CMD_TDLS_MGMT,
9570                 .doit = nl80211_tdls_mgmt,
9571                 .policy = nl80211_policy,
9572                 .flags = GENL_ADMIN_PERM,
9573                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9574                                   NL80211_FLAG_NEED_RTNL,
9575         },
9576         {
9577                 .cmd = NL80211_CMD_TDLS_OPER,
9578                 .doit = nl80211_tdls_oper,
9579                 .policy = nl80211_policy,
9580                 .flags = GENL_ADMIN_PERM,
9581                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9582                                   NL80211_FLAG_NEED_RTNL,
9583         },
9584         {
9585                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9586                 .doit = nl80211_register_unexpected_frame,
9587                 .policy = nl80211_policy,
9588                 .flags = GENL_ADMIN_PERM,
9589                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9590                                   NL80211_FLAG_NEED_RTNL,
9591         },
9592         {
9593                 .cmd = NL80211_CMD_PROBE_CLIENT,
9594                 .doit = nl80211_probe_client,
9595                 .policy = nl80211_policy,
9596                 .flags = GENL_ADMIN_PERM,
9597                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9598                                   NL80211_FLAG_NEED_RTNL,
9599         },
9600         {
9601                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9602                 .doit = nl80211_register_beacons,
9603                 .policy = nl80211_policy,
9604                 .flags = GENL_ADMIN_PERM,
9605                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9606                                   NL80211_FLAG_NEED_RTNL,
9607         },
9608         {
9609                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9610                 .doit = nl80211_set_noack_map,
9611                 .policy = nl80211_policy,
9612                 .flags = GENL_ADMIN_PERM,
9613                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9614                                   NL80211_FLAG_NEED_RTNL,
9615         },
9616         {
9617                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9618                 .doit = nl80211_start_p2p_device,
9619                 .policy = nl80211_policy,
9620                 .flags = GENL_ADMIN_PERM,
9621                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9622                                   NL80211_FLAG_NEED_RTNL,
9623         },
9624         {
9625                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
9626                 .doit = nl80211_stop_p2p_device,
9627                 .policy = nl80211_policy,
9628                 .flags = GENL_ADMIN_PERM,
9629                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9630                                   NL80211_FLAG_NEED_RTNL,
9631         },
9632         {
9633                 .cmd = NL80211_CMD_SET_MCAST_RATE,
9634                 .doit = nl80211_set_mcast_rate,
9635                 .policy = nl80211_policy,
9636                 .flags = GENL_ADMIN_PERM,
9637                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9638                                   NL80211_FLAG_NEED_RTNL,
9639         },
9640         {
9641                 .cmd = NL80211_CMD_SET_MAC_ACL,
9642                 .doit = nl80211_set_mac_acl,
9643                 .policy = nl80211_policy,
9644                 .flags = GENL_ADMIN_PERM,
9645                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9646                                   NL80211_FLAG_NEED_RTNL,
9647         },
9648         {
9649                 .cmd = NL80211_CMD_RADAR_DETECT,
9650                 .doit = nl80211_start_radar_detection,
9651                 .policy = nl80211_policy,
9652                 .flags = GENL_ADMIN_PERM,
9653                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9654                                   NL80211_FLAG_NEED_RTNL,
9655         },
9656         {
9657                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9658                 .doit = nl80211_get_protocol_features,
9659                 .policy = nl80211_policy,
9660         },
9661         {
9662                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9663                 .doit = nl80211_update_ft_ies,
9664                 .policy = nl80211_policy,
9665                 .flags = GENL_ADMIN_PERM,
9666                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9667                                   NL80211_FLAG_NEED_RTNL,
9668         },
9669         {
9670                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9671                 .doit = nl80211_crit_protocol_start,
9672                 .policy = nl80211_policy,
9673                 .flags = GENL_ADMIN_PERM,
9674                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9675                                   NL80211_FLAG_NEED_RTNL,
9676         },
9677         {
9678                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9679                 .doit = nl80211_crit_protocol_stop,
9680                 .policy = nl80211_policy,
9681                 .flags = GENL_ADMIN_PERM,
9682                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9683                                   NL80211_FLAG_NEED_RTNL,
9684         },
9685         {
9686                 .cmd = NL80211_CMD_GET_COALESCE,
9687                 .doit = nl80211_get_coalesce,
9688                 .policy = nl80211_policy,
9689                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9690                                   NL80211_FLAG_NEED_RTNL,
9691         },
9692         {
9693                 .cmd = NL80211_CMD_SET_COALESCE,
9694                 .doit = nl80211_set_coalesce,
9695                 .policy = nl80211_policy,
9696                 .flags = GENL_ADMIN_PERM,
9697                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9698                                   NL80211_FLAG_NEED_RTNL,
9699         },
9700         {
9701                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
9702                 .doit = nl80211_channel_switch,
9703                 .policy = nl80211_policy,
9704                 .flags = GENL_ADMIN_PERM,
9705                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9706                                   NL80211_FLAG_NEED_RTNL,
9707         },
9708         {
9709                 .cmd = NL80211_CMD_VENDOR,
9710                 .doit = nl80211_vendor_cmd,
9711                 .policy = nl80211_policy,
9712                 .flags = GENL_ADMIN_PERM,
9713                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9714                                   NL80211_FLAG_NEED_RTNL,
9715         },
9716 };
9717
9718 /* notification functions */
9719
9720 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9721 {
9722         struct sk_buff *msg;
9723         struct nl80211_dump_wiphy_state state = {};
9724
9725         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9726         if (!msg)
9727                 return;
9728
9729         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9730                 nlmsg_free(msg);
9731                 return;
9732         }
9733
9734         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9735                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
9736 }
9737
9738 static int nl80211_add_scan_req(struct sk_buff *msg,
9739                                 struct cfg80211_registered_device *rdev)
9740 {
9741         struct cfg80211_scan_request *req = rdev->scan_req;
9742         struct nlattr *nest;
9743         int i;
9744
9745         if (WARN_ON(!req))
9746                 return 0;
9747
9748         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9749         if (!nest)
9750                 goto nla_put_failure;
9751         for (i = 0; i < req->n_ssids; i++) {
9752                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9753                         goto nla_put_failure;
9754         }
9755         nla_nest_end(msg, nest);
9756
9757         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9758         if (!nest)
9759                 goto nla_put_failure;
9760         for (i = 0; i < req->n_channels; i++) {
9761                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9762                         goto nla_put_failure;
9763         }
9764         nla_nest_end(msg, nest);
9765
9766         if (req->ie &&
9767             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9768                 goto nla_put_failure;
9769
9770         if (req->flags &&
9771             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
9772                 goto nla_put_failure;
9773
9774         return 0;
9775  nla_put_failure:
9776         return -ENOBUFS;
9777 }
9778
9779 static int nl80211_send_scan_msg(struct sk_buff *msg,
9780                                  struct cfg80211_registered_device *rdev,
9781                                  struct wireless_dev *wdev,
9782                                  u32 portid, u32 seq, int flags,
9783                                  u32 cmd)
9784 {
9785         void *hdr;
9786
9787         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9788         if (!hdr)
9789                 return -1;
9790
9791         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9792             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9793                                          wdev->netdev->ifindex)) ||
9794             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9795                 goto nla_put_failure;
9796
9797         /* ignore errors and send incomplete event anyway */
9798         nl80211_add_scan_req(msg, rdev);
9799
9800         return genlmsg_end(msg, hdr);
9801
9802  nla_put_failure:
9803         genlmsg_cancel(msg, hdr);
9804         return -EMSGSIZE;
9805 }
9806
9807 static int
9808 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9809                             struct cfg80211_registered_device *rdev,
9810                             struct net_device *netdev,
9811                             u32 portid, u32 seq, int flags, u32 cmd)
9812 {
9813         void *hdr;
9814
9815         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9816         if (!hdr)
9817                 return -1;
9818
9819         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9820             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9821                 goto nla_put_failure;
9822
9823         return genlmsg_end(msg, hdr);
9824
9825  nla_put_failure:
9826         genlmsg_cancel(msg, hdr);
9827         return -EMSGSIZE;
9828 }
9829
9830 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9831                              struct wireless_dev *wdev)
9832 {
9833         struct sk_buff *msg;
9834
9835         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9836         if (!msg)
9837                 return;
9838
9839         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9840                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9841                 nlmsg_free(msg);
9842                 return;
9843         }
9844
9845         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9846                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9847 }
9848
9849 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9850                             struct wireless_dev *wdev)
9851 {
9852         struct sk_buff *msg;
9853
9854         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9855         if (!msg)
9856                 return;
9857
9858         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9859                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9860                 nlmsg_free(msg);
9861                 return;
9862         }
9863
9864         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9865                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9866 }
9867
9868 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9869                                struct wireless_dev *wdev)
9870 {
9871         struct sk_buff *msg;
9872
9873         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9874         if (!msg)
9875                 return;
9876
9877         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9878                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9879                 nlmsg_free(msg);
9880                 return;
9881         }
9882
9883         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9884                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9885 }
9886
9887 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9888                                      struct net_device *netdev)
9889 {
9890         struct sk_buff *msg;
9891
9892         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9893         if (!msg)
9894                 return;
9895
9896         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9897                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9898                 nlmsg_free(msg);
9899                 return;
9900         }
9901
9902         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9903                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9904 }
9905
9906 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9907                              struct net_device *netdev, u32 cmd)
9908 {
9909         struct sk_buff *msg;
9910
9911         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9912         if (!msg)
9913                 return;
9914
9915         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9916                 nlmsg_free(msg);
9917                 return;
9918         }
9919
9920         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9921                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9922 }
9923
9924 /*
9925  * This can happen on global regulatory changes or device specific settings
9926  * based on custom world regulatory domains.
9927  */
9928 void nl80211_send_reg_change_event(struct regulatory_request *request)
9929 {
9930         struct sk_buff *msg;
9931         void *hdr;
9932
9933         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9934         if (!msg)
9935                 return;
9936
9937         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9938         if (!hdr) {
9939                 nlmsg_free(msg);
9940                 return;
9941         }
9942
9943         /* Userspace can always count this one always being set */
9944         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9945                 goto nla_put_failure;
9946
9947         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9948                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9949                                NL80211_REGDOM_TYPE_WORLD))
9950                         goto nla_put_failure;
9951         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9952                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9953                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9954                         goto nla_put_failure;
9955         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9956                    request->intersect) {
9957                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9958                                NL80211_REGDOM_TYPE_INTERSECTION))
9959                         goto nla_put_failure;
9960         } else {
9961                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9962                                NL80211_REGDOM_TYPE_COUNTRY) ||
9963                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9964                                    request->alpha2))
9965                         goto nla_put_failure;
9966         }
9967
9968         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9969             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9970                 goto nla_put_failure;
9971
9972         genlmsg_end(msg, hdr);
9973
9974         rcu_read_lock();
9975         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
9976                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
9977         rcu_read_unlock();
9978
9979         return;
9980
9981 nla_put_failure:
9982         genlmsg_cancel(msg, hdr);
9983         nlmsg_free(msg);
9984 }
9985
9986 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9987                                     struct net_device *netdev,
9988                                     const u8 *buf, size_t len,
9989                                     enum nl80211_commands cmd, gfp_t gfp)
9990 {
9991         struct sk_buff *msg;
9992         void *hdr;
9993
9994         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9995         if (!msg)
9996                 return;
9997
9998         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9999         if (!hdr) {
10000                 nlmsg_free(msg);
10001                 return;
10002         }
10003
10004         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10005             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10006             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10007                 goto nla_put_failure;
10008
10009         genlmsg_end(msg, hdr);
10010
10011         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10012                                 NL80211_MCGRP_MLME, gfp);
10013         return;
10014
10015  nla_put_failure:
10016         genlmsg_cancel(msg, hdr);
10017         nlmsg_free(msg);
10018 }
10019
10020 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
10021                           struct net_device *netdev, const u8 *buf,
10022                           size_t len, gfp_t gfp)
10023 {
10024         nl80211_send_mlme_event(rdev, netdev, buf, len,
10025                                 NL80211_CMD_AUTHENTICATE, gfp);
10026 }
10027
10028 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
10029                            struct net_device *netdev, const u8 *buf,
10030                            size_t len, gfp_t gfp)
10031 {
10032         nl80211_send_mlme_event(rdev, netdev, buf, len,
10033                                 NL80211_CMD_ASSOCIATE, gfp);
10034 }
10035
10036 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
10037                          struct net_device *netdev, const u8 *buf,
10038                          size_t len, gfp_t gfp)
10039 {
10040         nl80211_send_mlme_event(rdev, netdev, buf, len,
10041                                 NL80211_CMD_DEAUTHENTICATE, gfp);
10042 }
10043
10044 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
10045                            struct net_device *netdev, const u8 *buf,
10046                            size_t len, gfp_t gfp)
10047 {
10048         nl80211_send_mlme_event(rdev, netdev, buf, len,
10049                                 NL80211_CMD_DISASSOCIATE, gfp);
10050 }
10051
10052 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
10053                                   size_t len)
10054 {
10055         struct wireless_dev *wdev = dev->ieee80211_ptr;
10056         struct wiphy *wiphy = wdev->wiphy;
10057         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10058         const struct ieee80211_mgmt *mgmt = (void *)buf;
10059         u32 cmd;
10060
10061         if (WARN_ON(len < 2))
10062                 return;
10063
10064         if (ieee80211_is_deauth(mgmt->frame_control))
10065                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
10066         else
10067                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
10068
10069         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
10070         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
10071 }
10072 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
10073
10074 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
10075                                       struct net_device *netdev, int cmd,
10076                                       const u8 *addr, gfp_t gfp)
10077 {
10078         struct sk_buff *msg;
10079         void *hdr;
10080
10081         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10082         if (!msg)
10083                 return;
10084
10085         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10086         if (!hdr) {
10087                 nlmsg_free(msg);
10088                 return;
10089         }
10090
10091         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10092             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10093             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
10094             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10095                 goto nla_put_failure;
10096
10097         genlmsg_end(msg, hdr);
10098
10099         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10100                                 NL80211_MCGRP_MLME, gfp);
10101         return;
10102
10103  nla_put_failure:
10104         genlmsg_cancel(msg, hdr);
10105         nlmsg_free(msg);
10106 }
10107
10108 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
10109                                struct net_device *netdev, const u8 *addr,
10110                                gfp_t gfp)
10111 {
10112         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
10113                                   addr, gfp);
10114 }
10115
10116 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
10117                                 struct net_device *netdev, const u8 *addr,
10118                                 gfp_t gfp)
10119 {
10120         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
10121                                   addr, gfp);
10122 }
10123
10124 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
10125                                  struct net_device *netdev, const u8 *bssid,
10126                                  const u8 *req_ie, size_t req_ie_len,
10127                                  const u8 *resp_ie, size_t resp_ie_len,
10128                                  u16 status, gfp_t gfp)
10129 {
10130         struct sk_buff *msg;
10131         void *hdr;
10132
10133         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10134         if (!msg)
10135                 return;
10136
10137         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10138         if (!hdr) {
10139                 nlmsg_free(msg);
10140                 return;
10141         }
10142
10143         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10144             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10145             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10146             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10147             (req_ie &&
10148              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10149             (resp_ie &&
10150              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10151                 goto nla_put_failure;
10152
10153         genlmsg_end(msg, hdr);
10154
10155         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10156                                 NL80211_MCGRP_MLME, gfp);
10157         return;
10158
10159  nla_put_failure:
10160         genlmsg_cancel(msg, hdr);
10161         nlmsg_free(msg);
10162
10163 }
10164
10165 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10166                          struct net_device *netdev, const u8 *bssid,
10167                          const u8 *req_ie, size_t req_ie_len,
10168                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10169 {
10170         struct sk_buff *msg;
10171         void *hdr;
10172
10173         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10174         if (!msg)
10175                 return;
10176
10177         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10178         if (!hdr) {
10179                 nlmsg_free(msg);
10180                 return;
10181         }
10182
10183         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10184             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10185             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10186             (req_ie &&
10187              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10188             (resp_ie &&
10189              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10190                 goto nla_put_failure;
10191
10192         genlmsg_end(msg, hdr);
10193
10194         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10195                                 NL80211_MCGRP_MLME, gfp);
10196         return;
10197
10198  nla_put_failure:
10199         genlmsg_cancel(msg, hdr);
10200         nlmsg_free(msg);
10201
10202 }
10203
10204 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10205                                struct net_device *netdev, u16 reason,
10206                                const u8 *ie, size_t ie_len, bool from_ap)
10207 {
10208         struct sk_buff *msg;
10209         void *hdr;
10210
10211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10212         if (!msg)
10213                 return;
10214
10215         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10216         if (!hdr) {
10217                 nlmsg_free(msg);
10218                 return;
10219         }
10220
10221         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10222             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10223             (from_ap && reason &&
10224              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10225             (from_ap &&
10226              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10227             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10228                 goto nla_put_failure;
10229
10230         genlmsg_end(msg, hdr);
10231
10232         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10233                                 NL80211_MCGRP_MLME, GFP_KERNEL);
10234         return;
10235
10236  nla_put_failure:
10237         genlmsg_cancel(msg, hdr);
10238         nlmsg_free(msg);
10239
10240 }
10241
10242 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10243                              struct net_device *netdev, const u8 *bssid,
10244                              gfp_t gfp)
10245 {
10246         struct sk_buff *msg;
10247         void *hdr;
10248
10249         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10250         if (!msg)
10251                 return;
10252
10253         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10254         if (!hdr) {
10255                 nlmsg_free(msg);
10256                 return;
10257         }
10258
10259         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10260             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10261             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10262                 goto nla_put_failure;
10263
10264         genlmsg_end(msg, hdr);
10265
10266         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10267                                 NL80211_MCGRP_MLME, gfp);
10268         return;
10269
10270  nla_put_failure:
10271         genlmsg_cancel(msg, hdr);
10272         nlmsg_free(msg);
10273 }
10274
10275 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10276                                         const u8* ie, u8 ie_len, gfp_t gfp)
10277 {
10278         struct wireless_dev *wdev = dev->ieee80211_ptr;
10279         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10280         struct sk_buff *msg;
10281         void *hdr;
10282
10283         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10284                 return;
10285
10286         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10287
10288         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10289         if (!msg)
10290                 return;
10291
10292         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10293         if (!hdr) {
10294                 nlmsg_free(msg);
10295                 return;
10296         }
10297
10298         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10299             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10300             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10301             (ie_len && ie &&
10302              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10303                 goto nla_put_failure;
10304
10305         genlmsg_end(msg, hdr);
10306
10307         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10308                                 NL80211_MCGRP_MLME, gfp);
10309         return;
10310
10311  nla_put_failure:
10312         genlmsg_cancel(msg, hdr);
10313         nlmsg_free(msg);
10314 }
10315 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10316
10317 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10318                                  struct net_device *netdev, const u8 *addr,
10319                                  enum nl80211_key_type key_type, int key_id,
10320                                  const u8 *tsc, gfp_t gfp)
10321 {
10322         struct sk_buff *msg;
10323         void *hdr;
10324
10325         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10326         if (!msg)
10327                 return;
10328
10329         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10330         if (!hdr) {
10331                 nlmsg_free(msg);
10332                 return;
10333         }
10334
10335         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10336             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10337             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10338             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10339             (key_id != -1 &&
10340              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10341             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10342                 goto nla_put_failure;
10343
10344         genlmsg_end(msg, hdr);
10345
10346         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10347                                 NL80211_MCGRP_MLME, gfp);
10348         return;
10349
10350  nla_put_failure:
10351         genlmsg_cancel(msg, hdr);
10352         nlmsg_free(msg);
10353 }
10354
10355 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10356                                     struct ieee80211_channel *channel_before,
10357                                     struct ieee80211_channel *channel_after)
10358 {
10359         struct sk_buff *msg;
10360         void *hdr;
10361         struct nlattr *nl_freq;
10362
10363         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10364         if (!msg)
10365                 return;
10366
10367         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10368         if (!hdr) {
10369                 nlmsg_free(msg);
10370                 return;
10371         }
10372
10373         /*
10374          * Since we are applying the beacon hint to a wiphy we know its
10375          * wiphy_idx is valid
10376          */
10377         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10378                 goto nla_put_failure;
10379
10380         /* Before */
10381         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10382         if (!nl_freq)
10383                 goto nla_put_failure;
10384         if (nl80211_msg_put_channel(msg, channel_before, false))
10385                 goto nla_put_failure;
10386         nla_nest_end(msg, nl_freq);
10387
10388         /* After */
10389         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10390         if (!nl_freq)
10391                 goto nla_put_failure;
10392         if (nl80211_msg_put_channel(msg, channel_after, false))
10393                 goto nla_put_failure;
10394         nla_nest_end(msg, nl_freq);
10395
10396         genlmsg_end(msg, hdr);
10397
10398         rcu_read_lock();
10399         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10400                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10401         rcu_read_unlock();
10402
10403         return;
10404
10405 nla_put_failure:
10406         genlmsg_cancel(msg, hdr);
10407         nlmsg_free(msg);
10408 }
10409
10410 static void nl80211_send_remain_on_chan_event(
10411         int cmd, struct cfg80211_registered_device *rdev,
10412         struct wireless_dev *wdev, u64 cookie,
10413         struct ieee80211_channel *chan,
10414         unsigned int duration, gfp_t gfp)
10415 {
10416         struct sk_buff *msg;
10417         void *hdr;
10418
10419         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10420         if (!msg)
10421                 return;
10422
10423         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10424         if (!hdr) {
10425                 nlmsg_free(msg);
10426                 return;
10427         }
10428
10429         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10430             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10431                                          wdev->netdev->ifindex)) ||
10432             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10433             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10434             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10435                         NL80211_CHAN_NO_HT) ||
10436             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10437                 goto nla_put_failure;
10438
10439         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10440             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10441                 goto nla_put_failure;
10442
10443         genlmsg_end(msg, hdr);
10444
10445         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10446                                 NL80211_MCGRP_MLME, gfp);
10447         return;
10448
10449  nla_put_failure:
10450         genlmsg_cancel(msg, hdr);
10451         nlmsg_free(msg);
10452 }
10453
10454 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10455                                struct ieee80211_channel *chan,
10456                                unsigned int duration, gfp_t gfp)
10457 {
10458         struct wiphy *wiphy = wdev->wiphy;
10459         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10460
10461         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10462         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10463                                           rdev, wdev, cookie, chan,
10464                                           duration, gfp);
10465 }
10466 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10467
10468 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10469                                         struct ieee80211_channel *chan,
10470                                         gfp_t gfp)
10471 {
10472         struct wiphy *wiphy = wdev->wiphy;
10473         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10474
10475         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10476         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10477                                           rdev, wdev, cookie, chan, 0, gfp);
10478 }
10479 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10480
10481 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10482                       struct station_info *sinfo, gfp_t gfp)
10483 {
10484         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10485         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10486         struct sk_buff *msg;
10487
10488         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10489
10490         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10491         if (!msg)
10492                 return;
10493
10494         if (nl80211_send_station(msg, 0, 0, 0,
10495                                  rdev, dev, mac_addr, sinfo) < 0) {
10496                 nlmsg_free(msg);
10497                 return;
10498         }
10499
10500         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10501                                 NL80211_MCGRP_MLME, gfp);
10502 }
10503 EXPORT_SYMBOL(cfg80211_new_sta);
10504
10505 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10506 {
10507         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10508         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10509         struct sk_buff *msg;
10510         void *hdr;
10511
10512         trace_cfg80211_del_sta(dev, mac_addr);
10513
10514         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10515         if (!msg)
10516                 return;
10517
10518         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10519         if (!hdr) {
10520                 nlmsg_free(msg);
10521                 return;
10522         }
10523
10524         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10525             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10526                 goto nla_put_failure;
10527
10528         genlmsg_end(msg, hdr);
10529
10530         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10531                                 NL80211_MCGRP_MLME, gfp);
10532         return;
10533
10534  nla_put_failure:
10535         genlmsg_cancel(msg, hdr);
10536         nlmsg_free(msg);
10537 }
10538 EXPORT_SYMBOL(cfg80211_del_sta);
10539
10540 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10541                           enum nl80211_connect_failed_reason reason,
10542                           gfp_t gfp)
10543 {
10544         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10545         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10546         struct sk_buff *msg;
10547         void *hdr;
10548
10549         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10550         if (!msg)
10551                 return;
10552
10553         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10554         if (!hdr) {
10555                 nlmsg_free(msg);
10556                 return;
10557         }
10558
10559         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10560             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10561             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10562                 goto nla_put_failure;
10563
10564         genlmsg_end(msg, hdr);
10565
10566         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10567                                 NL80211_MCGRP_MLME, gfp);
10568         return;
10569
10570  nla_put_failure:
10571         genlmsg_cancel(msg, hdr);
10572         nlmsg_free(msg);
10573 }
10574 EXPORT_SYMBOL(cfg80211_conn_failed);
10575
10576 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10577                                        const u8 *addr, gfp_t gfp)
10578 {
10579         struct wireless_dev *wdev = dev->ieee80211_ptr;
10580         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10581         struct sk_buff *msg;
10582         void *hdr;
10583         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10584
10585         if (!nlportid)
10586                 return false;
10587
10588         msg = nlmsg_new(100, gfp);
10589         if (!msg)
10590                 return true;
10591
10592         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10593         if (!hdr) {
10594                 nlmsg_free(msg);
10595                 return true;
10596         }
10597
10598         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10599             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10600             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10601                 goto nla_put_failure;
10602
10603         genlmsg_end(msg, hdr);
10604         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10605         return true;
10606
10607  nla_put_failure:
10608         genlmsg_cancel(msg, hdr);
10609         nlmsg_free(msg);
10610         return true;
10611 }
10612
10613 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10614                                 const u8 *addr, gfp_t gfp)
10615 {
10616         struct wireless_dev *wdev = dev->ieee80211_ptr;
10617         bool ret;
10618
10619         trace_cfg80211_rx_spurious_frame(dev, addr);
10620
10621         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10622                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
10623                 trace_cfg80211_return_bool(false);
10624                 return false;
10625         }
10626         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
10627                                          addr, gfp);
10628         trace_cfg80211_return_bool(ret);
10629         return ret;
10630 }
10631 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
10632
10633 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
10634                                         const u8 *addr, gfp_t gfp)
10635 {
10636         struct wireless_dev *wdev = dev->ieee80211_ptr;
10637         bool ret;
10638
10639         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
10640
10641         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10642                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10643                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
10644                 trace_cfg80211_return_bool(false);
10645                 return false;
10646         }
10647         ret = __nl80211_unexpected_frame(dev,
10648                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
10649                                          addr, gfp);
10650         trace_cfg80211_return_bool(ret);
10651         return ret;
10652 }
10653 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
10654
10655 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10656                       struct wireless_dev *wdev, u32 nlportid,
10657                       int freq, int sig_dbm,
10658                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
10659 {
10660         struct net_device *netdev = wdev->netdev;
10661         struct sk_buff *msg;
10662         void *hdr;
10663
10664         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10665         if (!msg)
10666                 return -ENOMEM;
10667
10668         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10669         if (!hdr) {
10670                 nlmsg_free(msg);
10671                 return -ENOMEM;
10672         }
10673
10674         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10675             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10676                                         netdev->ifindex)) ||
10677             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10678             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10679             (sig_dbm &&
10680              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10681             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10682             (flags &&
10683              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
10684                 goto nla_put_failure;
10685
10686         genlmsg_end(msg, hdr);
10687
10688         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10689
10690  nla_put_failure:
10691         genlmsg_cancel(msg, hdr);
10692         nlmsg_free(msg);
10693         return -ENOBUFS;
10694 }
10695
10696 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10697                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10698 {
10699         struct wiphy *wiphy = wdev->wiphy;
10700         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10701         struct net_device *netdev = wdev->netdev;
10702         struct sk_buff *msg;
10703         void *hdr;
10704
10705         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10706
10707         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10708         if (!msg)
10709                 return;
10710
10711         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10712         if (!hdr) {
10713                 nlmsg_free(msg);
10714                 return;
10715         }
10716
10717         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10718             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10719                                    netdev->ifindex)) ||
10720             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10721             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10722             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10723             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10724                 goto nla_put_failure;
10725
10726         genlmsg_end(msg, hdr);
10727
10728         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10729                                 NL80211_MCGRP_MLME, gfp);
10730         return;
10731
10732  nla_put_failure:
10733         genlmsg_cancel(msg, hdr);
10734         nlmsg_free(msg);
10735 }
10736 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10737
10738 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10739                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10740                               gfp_t gfp)
10741 {
10742         struct wireless_dev *wdev = dev->ieee80211_ptr;
10743         struct wiphy *wiphy = wdev->wiphy;
10744         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10745         struct sk_buff *msg;
10746         struct nlattr *pinfoattr;
10747         void *hdr;
10748
10749         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10750
10751         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10752         if (!msg)
10753                 return;
10754
10755         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10756         if (!hdr) {
10757                 nlmsg_free(msg);
10758                 return;
10759         }
10760
10761         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10762             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10763                 goto nla_put_failure;
10764
10765         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10766         if (!pinfoattr)
10767                 goto nla_put_failure;
10768
10769         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10770                         rssi_event))
10771                 goto nla_put_failure;
10772
10773         nla_nest_end(msg, pinfoattr);
10774
10775         genlmsg_end(msg, hdr);
10776
10777         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10778                                 NL80211_MCGRP_MLME, gfp);
10779         return;
10780
10781  nla_put_failure:
10782         genlmsg_cancel(msg, hdr);
10783         nlmsg_free(msg);
10784 }
10785 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10786
10787 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10788                                      struct net_device *netdev, const u8 *bssid,
10789                                      const u8 *replay_ctr, gfp_t gfp)
10790 {
10791         struct sk_buff *msg;
10792         struct nlattr *rekey_attr;
10793         void *hdr;
10794
10795         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10796         if (!msg)
10797                 return;
10798
10799         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10800         if (!hdr) {
10801                 nlmsg_free(msg);
10802                 return;
10803         }
10804
10805         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10806             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10807             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10808                 goto nla_put_failure;
10809
10810         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10811         if (!rekey_attr)
10812                 goto nla_put_failure;
10813
10814         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10815                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10816                 goto nla_put_failure;
10817
10818         nla_nest_end(msg, rekey_attr);
10819
10820         genlmsg_end(msg, hdr);
10821
10822         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10823                                 NL80211_MCGRP_MLME, gfp);
10824         return;
10825
10826  nla_put_failure:
10827         genlmsg_cancel(msg, hdr);
10828         nlmsg_free(msg);
10829 }
10830
10831 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10832                                const u8 *replay_ctr, gfp_t gfp)
10833 {
10834         struct wireless_dev *wdev = dev->ieee80211_ptr;
10835         struct wiphy *wiphy = wdev->wiphy;
10836         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10837
10838         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10839         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10840 }
10841 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10842
10843 static void
10844 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10845                                struct net_device *netdev, int index,
10846                                const u8 *bssid, bool preauth, gfp_t gfp)
10847 {
10848         struct sk_buff *msg;
10849         struct nlattr *attr;
10850         void *hdr;
10851
10852         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10853         if (!msg)
10854                 return;
10855
10856         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10857         if (!hdr) {
10858                 nlmsg_free(msg);
10859                 return;
10860         }
10861
10862         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10863             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10864                 goto nla_put_failure;
10865
10866         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10867         if (!attr)
10868                 goto nla_put_failure;
10869
10870         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10871             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10872             (preauth &&
10873              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10874                 goto nla_put_failure;
10875
10876         nla_nest_end(msg, attr);
10877
10878         genlmsg_end(msg, hdr);
10879
10880         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10881                                 NL80211_MCGRP_MLME, gfp);
10882         return;
10883
10884  nla_put_failure:
10885         genlmsg_cancel(msg, hdr);
10886         nlmsg_free(msg);
10887 }
10888
10889 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10890                                      const u8 *bssid, bool preauth, gfp_t gfp)
10891 {
10892         struct wireless_dev *wdev = dev->ieee80211_ptr;
10893         struct wiphy *wiphy = wdev->wiphy;
10894         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10895
10896         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10897         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10898 }
10899 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10900
10901 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10902                                      struct net_device *netdev,
10903                                      struct cfg80211_chan_def *chandef,
10904                                      gfp_t gfp)
10905 {
10906         struct sk_buff *msg;
10907         void *hdr;
10908
10909         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10910         if (!msg)
10911                 return;
10912
10913         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10914         if (!hdr) {
10915                 nlmsg_free(msg);
10916                 return;
10917         }
10918
10919         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10920                 goto nla_put_failure;
10921
10922         if (nl80211_send_chandef(msg, chandef))
10923                 goto nla_put_failure;
10924
10925         genlmsg_end(msg, hdr);
10926
10927         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10928                                 NL80211_MCGRP_MLME, gfp);
10929         return;
10930
10931  nla_put_failure:
10932         genlmsg_cancel(msg, hdr);
10933         nlmsg_free(msg);
10934 }
10935
10936 void cfg80211_ch_switch_notify(struct net_device *dev,
10937                                struct cfg80211_chan_def *chandef)
10938 {
10939         struct wireless_dev *wdev = dev->ieee80211_ptr;
10940         struct wiphy *wiphy = wdev->wiphy;
10941         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10942
10943         ASSERT_WDEV_LOCK(wdev);
10944
10945         trace_cfg80211_ch_switch_notify(dev, chandef);
10946
10947         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10948                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10949                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
10950                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10951                 return;
10952
10953         wdev->channel = chandef->chan;
10954         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10955 }
10956 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10957
10958 void cfg80211_cqm_txe_notify(struct net_device *dev,
10959                              const u8 *peer, u32 num_packets,
10960                              u32 rate, u32 intvl, gfp_t gfp)
10961 {
10962         struct wireless_dev *wdev = dev->ieee80211_ptr;
10963         struct wiphy *wiphy = wdev->wiphy;
10964         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10965         struct sk_buff *msg;
10966         struct nlattr *pinfoattr;
10967         void *hdr;
10968
10969         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10970         if (!msg)
10971                 return;
10972
10973         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10974         if (!hdr) {
10975                 nlmsg_free(msg);
10976                 return;
10977         }
10978
10979         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10980             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10981             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10982                 goto nla_put_failure;
10983
10984         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10985         if (!pinfoattr)
10986                 goto nla_put_failure;
10987
10988         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10989                 goto nla_put_failure;
10990
10991         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10992                 goto nla_put_failure;
10993
10994         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10995                 goto nla_put_failure;
10996
10997         nla_nest_end(msg, pinfoattr);
10998
10999         genlmsg_end(msg, hdr);
11000
11001         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11002                                 NL80211_MCGRP_MLME, gfp);
11003         return;
11004
11005  nla_put_failure:
11006         genlmsg_cancel(msg, hdr);
11007         nlmsg_free(msg);
11008 }
11009 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
11010
11011 void
11012 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
11013                      const struct cfg80211_chan_def *chandef,
11014                      enum nl80211_radar_event event,
11015                      struct net_device *netdev, gfp_t gfp)
11016 {
11017         struct sk_buff *msg;
11018         void *hdr;
11019
11020         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11021         if (!msg)
11022                 return;
11023
11024         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
11025         if (!hdr) {
11026                 nlmsg_free(msg);
11027                 return;
11028         }
11029
11030         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
11031                 goto nla_put_failure;
11032
11033         /* NOP and radar events don't need a netdev parameter */
11034         if (netdev) {
11035                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
11036
11037                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11038                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11039                         goto nla_put_failure;
11040         }
11041
11042         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
11043                 goto nla_put_failure;
11044
11045         if (nl80211_send_chandef(msg, chandef))
11046                 goto nla_put_failure;
11047
11048         genlmsg_end(msg, hdr);
11049
11050         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11051                                 NL80211_MCGRP_MLME, gfp);
11052         return;
11053
11054  nla_put_failure:
11055         genlmsg_cancel(msg, hdr);
11056         nlmsg_free(msg);
11057 }
11058
11059 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
11060                                  const u8 *peer, u32 num_packets, gfp_t gfp)
11061 {
11062         struct wireless_dev *wdev = dev->ieee80211_ptr;
11063         struct wiphy *wiphy = wdev->wiphy;
11064         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11065         struct sk_buff *msg;
11066         struct nlattr *pinfoattr;
11067         void *hdr;
11068
11069         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
11070
11071         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11072         if (!msg)
11073                 return;
11074
11075         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11076         if (!hdr) {
11077                 nlmsg_free(msg);
11078                 return;
11079         }
11080
11081         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11082             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11083             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11084                 goto nla_put_failure;
11085
11086         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11087         if (!pinfoattr)
11088                 goto nla_put_failure;
11089
11090         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
11091                 goto nla_put_failure;
11092
11093         nla_nest_end(msg, pinfoattr);
11094
11095         genlmsg_end(msg, hdr);
11096
11097         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11098                                 NL80211_MCGRP_MLME, gfp);
11099         return;
11100
11101  nla_put_failure:
11102         genlmsg_cancel(msg, hdr);
11103         nlmsg_free(msg);
11104 }
11105 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
11106
11107 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
11108                            u64 cookie, bool acked, gfp_t gfp)
11109 {
11110         struct wireless_dev *wdev = dev->ieee80211_ptr;
11111         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11112         struct sk_buff *msg;
11113         void *hdr;
11114
11115         trace_cfg80211_probe_status(dev, addr, cookie, acked);
11116
11117         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11118
11119         if (!msg)
11120                 return;
11121
11122         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
11123         if (!hdr) {
11124                 nlmsg_free(msg);
11125                 return;
11126         }
11127
11128         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11129             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11130             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11131             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11132             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11133                 goto nla_put_failure;
11134
11135         genlmsg_end(msg, hdr);
11136
11137         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11138                                 NL80211_MCGRP_MLME, gfp);
11139         return;
11140
11141  nla_put_failure:
11142         genlmsg_cancel(msg, hdr);
11143         nlmsg_free(msg);
11144 }
11145 EXPORT_SYMBOL(cfg80211_probe_status);
11146
11147 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11148                                  const u8 *frame, size_t len,
11149                                  int freq, int sig_dbm)
11150 {
11151         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11152         struct sk_buff *msg;
11153         void *hdr;
11154         struct cfg80211_beacon_registration *reg;
11155
11156         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11157
11158         spin_lock_bh(&rdev->beacon_registrations_lock);
11159         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11160                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11161                 if (!msg) {
11162                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11163                         return;
11164                 }
11165
11166                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11167                 if (!hdr)
11168                         goto nla_put_failure;
11169
11170                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11171                     (freq &&
11172                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11173                     (sig_dbm &&
11174                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11175                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11176                         goto nla_put_failure;
11177
11178                 genlmsg_end(msg, hdr);
11179
11180                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11181         }
11182         spin_unlock_bh(&rdev->beacon_registrations_lock);
11183         return;
11184
11185  nla_put_failure:
11186         spin_unlock_bh(&rdev->beacon_registrations_lock);
11187         if (hdr)
11188                 genlmsg_cancel(msg, hdr);
11189         nlmsg_free(msg);
11190 }
11191 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11192
11193 #ifdef CONFIG_PM
11194 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11195                                    struct cfg80211_wowlan_wakeup *wakeup,
11196                                    gfp_t gfp)
11197 {
11198         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11199         struct sk_buff *msg;
11200         void *hdr;
11201         int size = 200;
11202
11203         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11204
11205         if (wakeup)
11206                 size += wakeup->packet_present_len;
11207
11208         msg = nlmsg_new(size, gfp);
11209         if (!msg)
11210                 return;
11211
11212         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11213         if (!hdr)
11214                 goto free_msg;
11215
11216         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11217             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11218                 goto free_msg;
11219
11220         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11221                                         wdev->netdev->ifindex))
11222                 goto free_msg;
11223
11224         if (wakeup) {
11225                 struct nlattr *reasons;
11226
11227                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11228                 if (!reasons)
11229                         goto free_msg;
11230
11231                 if (wakeup->disconnect &&
11232                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11233                         goto free_msg;
11234                 if (wakeup->magic_pkt &&
11235                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11236                         goto free_msg;
11237                 if (wakeup->gtk_rekey_failure &&
11238                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11239                         goto free_msg;
11240                 if (wakeup->eap_identity_req &&
11241                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11242                         goto free_msg;
11243                 if (wakeup->four_way_handshake &&
11244                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11245                         goto free_msg;
11246                 if (wakeup->rfkill_release &&
11247                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11248                         goto free_msg;
11249
11250                 if (wakeup->pattern_idx >= 0 &&
11251                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11252                                 wakeup->pattern_idx))
11253                         goto free_msg;
11254
11255                 if (wakeup->tcp_match &&
11256                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
11257                         goto free_msg;
11258
11259                 if (wakeup->tcp_connlost &&
11260                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
11261                         goto free_msg;
11262
11263                 if (wakeup->tcp_nomoretokens &&
11264                     nla_put_flag(msg,
11265                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
11266                         goto free_msg;
11267
11268                 if (wakeup->packet) {
11269                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11270                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11271
11272                         if (!wakeup->packet_80211) {
11273                                 pkt_attr =
11274                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11275                                 len_attr =
11276                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11277                         }
11278
11279                         if (wakeup->packet_len &&
11280                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11281                                 goto free_msg;
11282
11283                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11284                                     wakeup->packet))
11285                                 goto free_msg;
11286                 }
11287
11288                 nla_nest_end(msg, reasons);
11289         }
11290
11291         genlmsg_end(msg, hdr);
11292
11293         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11294                                 NL80211_MCGRP_MLME, gfp);
11295         return;
11296
11297  free_msg:
11298         nlmsg_free(msg);
11299 }
11300 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11301 #endif
11302
11303 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11304                                 enum nl80211_tdls_operation oper,
11305                                 u16 reason_code, gfp_t gfp)
11306 {
11307         struct wireless_dev *wdev = dev->ieee80211_ptr;
11308         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11309         struct sk_buff *msg;
11310         void *hdr;
11311
11312         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11313                                          reason_code);
11314
11315         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11316         if (!msg)
11317                 return;
11318
11319         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11320         if (!hdr) {
11321                 nlmsg_free(msg);
11322                 return;
11323         }
11324
11325         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11326             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11327             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11328             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11329             (reason_code > 0 &&
11330              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11331                 goto nla_put_failure;
11332
11333         genlmsg_end(msg, hdr);
11334
11335         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11336                                 NL80211_MCGRP_MLME, gfp);
11337         return;
11338
11339  nla_put_failure:
11340         genlmsg_cancel(msg, hdr);
11341         nlmsg_free(msg);
11342 }
11343 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11344
11345 static int nl80211_netlink_notify(struct notifier_block * nb,
11346                                   unsigned long state,
11347                                   void *_notify)
11348 {
11349         struct netlink_notify *notify = _notify;
11350         struct cfg80211_registered_device *rdev;
11351         struct wireless_dev *wdev;
11352         struct cfg80211_beacon_registration *reg, *tmp;
11353
11354         if (state != NETLINK_URELEASE)
11355                 return NOTIFY_DONE;
11356
11357         rcu_read_lock();
11358
11359         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11360                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
11361                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11362
11363                 spin_lock_bh(&rdev->beacon_registrations_lock);
11364                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11365                                          list) {
11366                         if (reg->nlportid == notify->portid) {
11367                                 list_del(&reg->list);
11368                                 kfree(reg);
11369                                 break;
11370                         }
11371                 }
11372                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11373         }
11374
11375         rcu_read_unlock();
11376
11377         return NOTIFY_DONE;
11378 }
11379
11380 static struct notifier_block nl80211_netlink_notifier = {
11381         .notifier_call = nl80211_netlink_notify,
11382 };
11383
11384 void cfg80211_ft_event(struct net_device *netdev,
11385                        struct cfg80211_ft_event_params *ft_event)
11386 {
11387         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11388         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11389         struct sk_buff *msg;
11390         void *hdr;
11391
11392         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11393
11394         if (!ft_event->target_ap)
11395                 return;
11396
11397         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11398         if (!msg)
11399                 return;
11400
11401         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11402         if (!hdr)
11403                 goto out;
11404
11405         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11406             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11407             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
11408                 goto out;
11409
11410         if (ft_event->ies &&
11411             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
11412                 goto out;
11413         if (ft_event->ric_ies &&
11414             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11415                     ft_event->ric_ies))
11416                 goto out;
11417
11418         genlmsg_end(msg, hdr);
11419
11420         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11421                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11422         return;
11423  out:
11424         nlmsg_free(msg);
11425 }
11426 EXPORT_SYMBOL(cfg80211_ft_event);
11427
11428 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11429 {
11430         struct cfg80211_registered_device *rdev;
11431         struct sk_buff *msg;
11432         void *hdr;
11433         u32 nlportid;
11434
11435         rdev = wiphy_to_dev(wdev->wiphy);
11436         if (!rdev->crit_proto_nlportid)
11437                 return;
11438
11439         nlportid = rdev->crit_proto_nlportid;
11440         rdev->crit_proto_nlportid = 0;
11441
11442         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11443         if (!msg)
11444                 return;
11445
11446         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11447         if (!hdr)
11448                 goto nla_put_failure;
11449
11450         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11451             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11452                 goto nla_put_failure;
11453
11454         genlmsg_end(msg, hdr);
11455
11456         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11457         return;
11458
11459  nla_put_failure:
11460         if (hdr)
11461                 genlmsg_cancel(msg, hdr);
11462         nlmsg_free(msg);
11463
11464 }
11465 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11466
11467 /* initialisation/exit functions */
11468
11469 int nl80211_init(void)
11470 {
11471         int err;
11472
11473         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
11474                                                    nl80211_mcgrps);
11475         if (err)
11476                 return err;
11477
11478         err = netlink_register_notifier(&nl80211_netlink_notifier);
11479         if (err)
11480                 goto err_out;
11481
11482         return 0;
11483  err_out:
11484         genl_unregister_family(&nl80211_fam);
11485         return err;
11486 }
11487
11488 void nl80211_exit(void)
11489 {
11490         netlink_unregister_notifier(&nl80211_netlink_notifier);
11491         genl_unregister_family(&nl80211_fam);
11492 }