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_VENDOR,
  57         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  58 };
  59
  60 static const struct genl_multicast_group nl80211_mcgrps[] = {
  61         [NL80211_MCGRP_CONFIG] = { .name = "config", },
  62         [NL80211_MCGRP_SCAN] = { .name = "scan", },
  63         [NL80211_MCGRP_REGULATORY] = { .name = "regulatory", },
  64         [NL80211_MCGRP_MLME] = { .name = "mlme", },
  65         [NL80211_MCGRP_VENDOR] = { .name = "vendor", },
  66 #ifdef CONFIG_NL80211_TESTMODE
  67         [NL80211_MCGRP_TESTMODE] = { .name = "testmode", }
  68 #endif
  69 };
  70
  71 /* returns ERR_PTR values */
  72 static struct wireless_dev *
  73 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  74 {
  75         struct cfg80211_registered_device *rdev;
  76         struct wireless_dev *result = NULL;
  77         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  78         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  79         u64 wdev_id;
  80         int wiphy_idx = -1;
  81         int ifidx = -1;
  82
  83         ASSERT_RTNL();
  84
  85         if (!have_ifidx && !have_wdev_id)
  86                 return ERR_PTR(-EINVAL);
  87
  88         if (have_ifidx)
  89                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  90         if (have_wdev_id) {
  91                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  92                 wiphy_idx = wdev_id >> 32;
  93         }
  94
  95         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  96                 struct wireless_dev *wdev;
  97
  98                 if (wiphy_net(&rdev->wiphy) != netns)
  99                         continue;
 100
 101                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 102                         continue;
 103
 104                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 105                         if (have_ifidx && wdev->netdev &&
 106                             wdev->netdev->ifindex == ifidx) {
 107                                 result = wdev;
 108                                 break;
 109                         }
 110                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 111                                 result = wdev;
 112                                 break;
 113                         }
 114                 }
 115
 116                 if (result)
 117                         break;
 118         }
 119
 120         if (result)
 121                 return result;
 122         return ERR_PTR(-ENODEV);
 123 }
 124
 125 static struct cfg80211_registered_device *
 126 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 127 {
 128         struct cfg80211_registered_device *rdev = NULL, *tmp;
 129         struct net_device *netdev;
 130
 131         ASSERT_RTNL();
 132
 133         if (!attrs[NL80211_ATTR_WIPHY] &&
 134             !attrs[NL80211_ATTR_IFINDEX] &&
 135             !attrs[NL80211_ATTR_WDEV])
 136                 return ERR_PTR(-EINVAL);
 137
 138         if (attrs[NL80211_ATTR_WIPHY])
 139                 rdev = cfg80211_rdev_by_wiphy_idx(
 140                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 141
 142         if (attrs[NL80211_ATTR_WDEV]) {
 143                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 144                 struct wireless_dev *wdev;
 145                 bool found = false;
 146
 147                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 148                 if (tmp) {
 149                         /* make sure wdev exists */
 150                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 151                                 if (wdev->identifier != (u32)wdev_id)
 152                                         continue;
 153                                 found = true;
 154                                 break;
 155                         }
 156
 157                         if (!found)
 158                                 tmp = NULL;
 159
 160                         if (rdev && tmp != rdev)
 161                                 return ERR_PTR(-EINVAL);
 162                         rdev = tmp;
 163                 }
 164         }
 165
 166         if (attrs[NL80211_ATTR_IFINDEX]) {
 167                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 168                 netdev = __dev_get_by_index(netns, ifindex);
 169                 if (netdev) {
 170                         if (netdev->ieee80211_ptr)
 171                                 tmp = wiphy_to_dev(
 172                                                 netdev->ieee80211_ptr->wiphy);
 173                         else
 174                                 tmp = NULL;
 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         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 384                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 385         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 386         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 387 };
 388
 389 /* policy for the key attributes */
 390 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 391         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 392         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 393         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 394         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 395         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 396         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 397         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 398         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 399 };
 400
 401 /* policy for the key default flags */
 402 static const struct nla_policy
 403 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 404         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 405         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 406 };
 407
 408 /* policy for WoWLAN attributes */
 409 static const struct nla_policy
 410 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 411         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 412         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 413         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 414         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 415         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 416         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 417         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 418         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 419         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 420 };
 421
 422 static const struct nla_policy
 423 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 424         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 425         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 426         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 427         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 428         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 429         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 430         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 431                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 432         },
 433         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 434                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 435         },
 436         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 437         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 438         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 439 };
 440
 441 /* policy for coalesce rule attributes */
 442 static const struct nla_policy
 443 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 444         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 445         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 446         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 447 };
 448
 449 /* policy for GTK rekey offload attributes */
 450 static const struct nla_policy
 451 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 452         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 453         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 454         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 455 };
 456
 457 static const struct nla_policy
 458 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 459         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 460                                                  .len = IEEE80211_MAX_SSID_LEN },
 461         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 462 };
 463
 464 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 465                                      struct netlink_callback *cb,
 466                                      struct cfg80211_registered_device **rdev,
 467                                      struct wireless_dev **wdev)
 468 {
 469         int err;
 470
 471         rtnl_lock();
 472
 473         if (!cb->args[0]) {
 474                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 475                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 476                                   nl80211_policy);
 477                 if (err)
 478                         goto out_unlock;
 479
 480                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 481                                                    nl80211_fam.attrbuf);
 482                 if (IS_ERR(*wdev)) {
 483                         err = PTR_ERR(*wdev);
 484                         goto out_unlock;
 485                 }
 486                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 487                 /* 0 is the first index - add 1 to parse only once */
 488                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 489                 cb->args[1] = (*wdev)->identifier;
 490         } else {
 491                 /* subtract the 1 again here */
 492                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 493                 struct wireless_dev *tmp;
 494
 495                 if (!wiphy) {
 496                         err = -ENODEV;
 497                         goto out_unlock;
 498                 }
 499                 *rdev = wiphy_to_dev(wiphy);
 500                 *wdev = NULL;
 501
 502                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 503                         if (tmp->identifier == cb->args[1]) {
 504                                 *wdev = tmp;
 505                                 break;
 506                         }
 507                 }
 508
 509                 if (!*wdev) {
 510                         err = -ENODEV;
 511                         goto out_unlock;
 512                 }
 513         }
 514
 515         return 0;
 516  out_unlock:
 517         rtnl_unlock();
 518         return err;
 519 }
 520
 521 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 522 {
 523         rtnl_unlock();
 524 }
 525
 526 /* IE validation */
 527 static bool is_valid_ie_attr(const struct nlattr *attr)
 528 {
 529         const u8 *pos;
 530         int len;
 531
 532         if (!attr)
 533                 return true;
 534
 535         pos = nla_data(attr);
 536         len = nla_len(attr);
 537
 538         while (len) {
 539                 u8 elemlen;
 540
 541                 if (len < 2)
 542                         return false;
 543                 len -= 2;
 544
 545                 elemlen = pos[1];
 546                 if (elemlen > len)
 547                         return false;
 548
 549                 len -= elemlen;
 550                 pos += 2 + elemlen;
 551         }
 552
 553         return true;
 554 }
 555
 556 /* message building helper */
 557 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 558                                    int flags, u8 cmd)
 559 {
 560         /* since there is no private header just add the generic one */
 561         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 562 }
 563
 564 static int nl80211_msg_put_channel(struct sk_buff *msg,
 565                                    struct ieee80211_channel *chan,
 566                                    bool large)
 567 {
 568         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 569                         chan->center_freq))
 570                 goto nla_put_failure;
 571
 572         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 573             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 574                 goto nla_put_failure;
 575         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 576                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 577                         goto nla_put_failure;
 578                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 579                         goto nla_put_failure;
 580         }
 581         if (chan->flags & IEEE80211_CHAN_RADAR) {
 582                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 583                         goto nla_put_failure;
 584                 if (large) {
 585                         u32 time;
 586
 587                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 588
 589                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 590                                         chan->dfs_state))
 591                                 goto nla_put_failure;
 592                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 593                                         time))
 594                                 goto nla_put_failure;
 595                 }
 596         }
 597
 598         if (large) {
 599                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 600                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 601                         goto nla_put_failure;
 602                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 603                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 604                         goto nla_put_failure;
 605                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 606                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 607                         goto nla_put_failure;
 608                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 609                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 610                         goto nla_put_failure;
 611         }
 612
 613         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 614                         DBM_TO_MBM(chan->max_power)))
 615                 goto nla_put_failure;
 616
 617         return 0;
 618
 619  nla_put_failure:
 620         return -ENOBUFS;
 621 }
 622
 623 /* netlink command implementations */
 624
 625 struct key_parse {
 626         struct key_params p;
 627         int idx;
 628         int type;
 629         bool def, defmgmt;
 630         bool def_uni, def_multi;
 631 };
 632
 633 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 634 {
 635         struct nlattr *tb[NL80211_KEY_MAX + 1];
 636         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 637                                    nl80211_key_policy);
 638         if (err)
 639                 return err;
 640
 641         k->def = !!tb[NL80211_KEY_DEFAULT];
 642         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 643
 644         if (k->def) {
 645                 k->def_uni = true;
 646                 k->def_multi = true;
 647         }
 648         if (k->defmgmt)
 649                 k->def_multi = true;
 650
 651         if (tb[NL80211_KEY_IDX])
 652                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 653
 654         if (tb[NL80211_KEY_DATA]) {
 655                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 656                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 657         }
 658
 659         if (tb[NL80211_KEY_SEQ]) {
 660                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 661                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 662         }
 663
 664         if (tb[NL80211_KEY_CIPHER])
 665                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 666
 667         if (tb[NL80211_KEY_TYPE]) {
 668                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 669                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 670                         return -EINVAL;
 671         }
 672
 673         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 674                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 675                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 676                                        tb[NL80211_KEY_DEFAULT_TYPES],
 677                                        nl80211_key_default_policy);
 678                 if (err)
 679                         return err;
 680
 681                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 682                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 683         }
 684
 685         return 0;
 686 }
 687
 688 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 689 {
 690         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 691                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 692                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 693         }
 694
 695         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 696                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 697                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 698         }
 699
 700         if (info->attrs[NL80211_ATTR_KEY_IDX])
 701                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 702
 703         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 704                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 705
 706         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 707         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 708
 709         if (k->def) {
 710                 k->def_uni = true;
 711                 k->def_multi = true;
 712         }
 713         if (k->defmgmt)
 714                 k->def_multi = true;
 715
 716         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 717                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 718                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 719                         return -EINVAL;
 720         }
 721
 722         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 723                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 724                 int err = nla_parse_nested(
 725                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 726                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 727                                 nl80211_key_default_policy);
 728                 if (err)
 729                         return err;
 730
 731                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 732                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 733         }
 734
 735         return 0;
 736 }
 737
 738 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 739 {
 740         int err;
 741
 742         memset(k, 0, sizeof(*k));
 743         k->idx = -1;
 744         k->type = -1;
 745
 746         if (info->attrs[NL80211_ATTR_KEY])
 747                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 748         else
 749                 err = nl80211_parse_key_old(info, k);
 750
 751         if (err)
 752                 return err;
 753
 754         if (k->def && k->defmgmt)
 755                 return -EINVAL;
 756
 757         if (k->defmgmt) {
 758                 if (k->def_uni || !k->def_multi)
 759                         return -EINVAL;
 760         }
 761
 762         if (k->idx != -1) {
 763                 if (k->defmgmt) {
 764                         if (k->idx < 4 || k->idx > 5)
 765                                 return -EINVAL;
 766                 } else if (k->def) {
 767                         if (k->idx < 0 || k->idx > 3)
 768                                 return -EINVAL;
 769                 } else {
 770                         if (k->idx < 0 || k->idx > 5)
 771                                 return -EINVAL;
 772                 }
 773         }
 774
 775         return 0;
 776 }
 777
 778 static struct cfg80211_cached_keys *
 779 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 780                        struct nlattr *keys, bool *no_ht)
 781 {
 782         struct key_parse parse;
 783         struct nlattr *key;
 784         struct cfg80211_cached_keys *result;
 785         int rem, err, def = 0;
 786
 787         result = kzalloc(sizeof(*result), GFP_KERNEL);
 788         if (!result)
 789                 return ERR_PTR(-ENOMEM);
 790
 791         result->def = -1;
 792         result->defmgmt = -1;
 793
 794         nla_for_each_nested(key, keys, rem) {
 795                 memset(&parse, 0, sizeof(parse));
 796                 parse.idx = -1;
 797
 798                 err = nl80211_parse_key_new(key, &parse);
 799                 if (err)
 800                         goto error;
 801                 err = -EINVAL;
 802                 if (!parse.p.key)
 803                         goto error;
 804                 if (parse.idx < 0 || parse.idx > 4)
 805                         goto error;
 806                 if (parse.def) {
 807                         if (def)
 808                                 goto error;
 809                         def = 1;
 810                         result->def = parse.idx;
 811                         if (!parse.def_uni || !parse.def_multi)
 812                                 goto error;
 813                 } else if (parse.defmgmt)
 814                         goto error;
 815                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 816                                                      parse.idx, false, NULL);
 817                 if (err)
 818                         goto error;
 819                 result->params[parse.idx].cipher = parse.p.cipher;
 820                 result->params[parse.idx].key_len = parse.p.key_len;
 821                 result->params[parse.idx].key = result->data[parse.idx];
 822                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 823
 824                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 825                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 826                         if (no_ht)
 827                                 *no_ht = true;
 828                 }
 829         }
 830
 831         return result;
 832  error:
 833         kfree(result);
 834         return ERR_PTR(err);
 835 }
 836
 837 static int nl80211_key_allowed(struct wireless_dev *wdev)
 838 {
 839         ASSERT_WDEV_LOCK(wdev);
 840
 841         switch (wdev->iftype) {
 842         case NL80211_IFTYPE_AP:
 843         case NL80211_IFTYPE_AP_VLAN:
 844         case NL80211_IFTYPE_P2P_GO:
 845         case NL80211_IFTYPE_MESH_POINT:
 846                 break;
 847         case NL80211_IFTYPE_ADHOC:
 848         case NL80211_IFTYPE_STATION:
 849         case NL80211_IFTYPE_P2P_CLIENT:
 850                 if (!wdev->current_bss)
 851                         return -ENOLINK;
 852                 break;
 853         default:
 854                 return -EINVAL;
 855         }
 856
 857         return 0;
 858 }
 859
 860 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 861                                                         struct nlattr *tb)
 862 {
 863         struct ieee80211_channel *chan;
 864
 865         if (tb == NULL)
 866                 return NULL;
 867         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 868         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 869                 return NULL;
 870         return chan;
 871 }
 872
 873 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 874 {
 875         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 876         int i;
 877
 878         if (!nl_modes)
 879                 goto nla_put_failure;
 880
 881         i = 0;
 882         while (ifmodes) {
 883                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 884                         goto nla_put_failure;
 885                 ifmodes >>= 1;
 886                 i++;
 887         }
 888
 889         nla_nest_end(msg, nl_modes);
 890         return 0;
 891
 892 nla_put_failure:
 893         return -ENOBUFS;
 894 }
 895
 896 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 897                                           struct sk_buff *msg,
 898                                           bool large)
 899 {
 900         struct nlattr *nl_combis;
 901         int i, j;
 902
 903         nl_combis = nla_nest_start(msg,
 904                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 905         if (!nl_combis)
 906                 goto nla_put_failure;
 907
 908         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 909                 const struct ieee80211_iface_combination *c;
 910                 struct nlattr *nl_combi, *nl_limits;
 911
 912                 c = &wiphy->iface_combinations[i];
 913
 914                 nl_combi = nla_nest_start(msg, i + 1);
 915                 if (!nl_combi)
 916                         goto nla_put_failure;
 917
 918                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 919                 if (!nl_limits)
 920                         goto nla_put_failure;
 921
 922                 for (j = 0; j < c->n_limits; j++) {
 923                         struct nlattr *nl_limit;
 924
 925                         nl_limit = nla_nest_start(msg, j + 1);
 926                         if (!nl_limit)
 927                                 goto nla_put_failure;
 928                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 929                                         c->limits[j].max))
 930                                 goto nla_put_failure;
 931                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 932                                                 c->limits[j].types))
 933                                 goto nla_put_failure;
 934                         nla_nest_end(msg, nl_limit);
 935                 }
 936
 937                 nla_nest_end(msg, nl_limits);
 938
 939                 if (c->beacon_int_infra_match &&
 940                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 941                         goto nla_put_failure;
 942                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 943                                 c->num_different_channels) ||
 944                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 945                                 c->max_interfaces))
 946                         goto nla_put_failure;
 947                 if (large &&
 948                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 949                                 c->radar_detect_widths))
 950                         goto nla_put_failure;
 951
 952                 nla_nest_end(msg, nl_combi);
 953         }
 954
 955         nla_nest_end(msg, nl_combis);
 956
 957         return 0;
 958 nla_put_failure:
 959         return -ENOBUFS;
 960 }
 961
 962 #ifdef CONFIG_PM
 963 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 964                                         struct sk_buff *msg)
 965 {
 966         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 967         struct nlattr *nl_tcp;
 968
 969         if (!tcp)
 970                 return 0;
 971
 972         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 973         if (!nl_tcp)
 974                 return -ENOBUFS;
 975
 976         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 977                         tcp->data_payload_max))
 978                 return -ENOBUFS;
 979
 980         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 981                         tcp->data_payload_max))
 982                 return -ENOBUFS;
 983
 984         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 985                 return -ENOBUFS;
 986
 987         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 988                                 sizeof(*tcp->tok), tcp->tok))
 989                 return -ENOBUFS;
 990
 991         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 992                         tcp->data_interval_max))
 993                 return -ENOBUFS;
 994
 995         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 996                         tcp->wake_payload_max))
 997                 return -ENOBUFS;
 998
 999         nla_nest_end(msg, nl_tcp);
1000         return 0;
1001 }
1002
1003 static int nl80211_send_wowlan(struct sk_buff *msg,
1004                                struct cfg80211_registered_device *dev,
1005                                bool large)
1006 {
1007         struct nlattr *nl_wowlan;
1008
1009         if (!dev->wiphy.wowlan)
1010                 return 0;
1011
1012         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1013         if (!nl_wowlan)
1014                 return -ENOBUFS;
1015
1016         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1017              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1018             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1019              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1020             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1021              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1022             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1023              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1024             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1025              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1026             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1027              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1028             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1029              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1030             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1031              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1032                 return -ENOBUFS;
1033
1034         if (dev->wiphy.wowlan->n_patterns) {
1035                 struct nl80211_pattern_support pat = {
1036                         .max_patterns = dev->wiphy.wowlan->n_patterns,
1037                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
1038                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
1039                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
1040                 };
1041
1042                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1043                             sizeof(pat), &pat))
1044                         return -ENOBUFS;
1045         }
1046
1047         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1048                 return -ENOBUFS;
1049
1050         nla_nest_end(msg, nl_wowlan);
1051
1052         return 0;
1053 }
1054 #endif
1055
1056 static int nl80211_send_coalesce(struct sk_buff *msg,
1057                                  struct cfg80211_registered_device *dev)
1058 {
1059         struct nl80211_coalesce_rule_support rule;
1060
1061         if (!dev->wiphy.coalesce)
1062                 return 0;
1063
1064         rule.max_rules = dev->wiphy.coalesce->n_rules;
1065         rule.max_delay = dev->wiphy.coalesce->max_delay;
1066         rule.pat.max_patterns = dev->wiphy.coalesce->n_patterns;
1067         rule.pat.min_pattern_len = dev->wiphy.coalesce->pattern_min_len;
1068         rule.pat.max_pattern_len = dev->wiphy.coalesce->pattern_max_len;
1069         rule.pat.max_pkt_offset = dev->wiphy.coalesce->max_pkt_offset;
1070
1071         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1072                 return -ENOBUFS;
1073
1074         return 0;
1075 }
1076
1077 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1078                                       struct ieee80211_supported_band *sband)
1079 {
1080         struct nlattr *nl_rates, *nl_rate;
1081         struct ieee80211_rate *rate;
1082         int i;
1083
1084         /* add HT info */
1085         if (sband->ht_cap.ht_supported &&
1086             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1087                      sizeof(sband->ht_cap.mcs),
1088                      &sband->ht_cap.mcs) ||
1089              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1090                          sband->ht_cap.cap) ||
1091              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1092                         sband->ht_cap.ampdu_factor) ||
1093              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1094                         sband->ht_cap.ampdu_density)))
1095                 return -ENOBUFS;
1096
1097         /* add VHT info */
1098         if (sband->vht_cap.vht_supported &&
1099             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1100                      sizeof(sband->vht_cap.vht_mcs),
1101                      &sband->vht_cap.vht_mcs) ||
1102              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1103                          sband->vht_cap.cap)))
1104                 return -ENOBUFS;
1105
1106         /* add bitrates */
1107         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1108         if (!nl_rates)
1109                 return -ENOBUFS;
1110
1111         for (i = 0; i < sband->n_bitrates; i++) {
1112                 nl_rate = nla_nest_start(msg, i);
1113                 if (!nl_rate)
1114                         return -ENOBUFS;
1115
1116                 rate = &sband->bitrates[i];
1117                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1118                                 rate->bitrate))
1119                         return -ENOBUFS;
1120                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1121                     nla_put_flag(msg,
1122                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1123                         return -ENOBUFS;
1124
1125                 nla_nest_end(msg, nl_rate);
1126         }
1127
1128         nla_nest_end(msg, nl_rates);
1129
1130         return 0;
1131 }
1132
1133 static int
1134 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1135                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1136 {
1137         u16 stypes;
1138         struct nlattr *nl_ftypes, *nl_ifs;
1139         enum nl80211_iftype ift;
1140         int i;
1141
1142         if (!mgmt_stypes)
1143                 return 0;
1144
1145         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1146         if (!nl_ifs)
1147                 return -ENOBUFS;
1148
1149         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1150                 nl_ftypes = nla_nest_start(msg, ift);
1151                 if (!nl_ftypes)
1152                         return -ENOBUFS;
1153                 i = 0;
1154                 stypes = mgmt_stypes[ift].tx;
1155                 while (stypes) {
1156                         if ((stypes & 1) &&
1157                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1158                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1159                                 return -ENOBUFS;
1160                         stypes >>= 1;
1161                         i++;
1162                 }
1163                 nla_nest_end(msg, nl_ftypes);
1164         }
1165
1166         nla_nest_end(msg, nl_ifs);
1167
1168         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1169         if (!nl_ifs)
1170                 return -ENOBUFS;
1171
1172         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1173                 nl_ftypes = nla_nest_start(msg, ift);
1174                 if (!nl_ftypes)
1175                         return -ENOBUFS;
1176                 i = 0;
1177                 stypes = mgmt_stypes[ift].rx;
1178                 while (stypes) {
1179                         if ((stypes & 1) &&
1180                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1181                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1182                                 return -ENOBUFS;
1183                         stypes >>= 1;
1184                         i++;
1185                 }
1186                 nla_nest_end(msg, nl_ftypes);
1187         }
1188         nla_nest_end(msg, nl_ifs);
1189
1190         return 0;
1191 }
1192
1193 struct nl80211_dump_wiphy_state {
1194         s64 filter_wiphy;
1195         long start;
1196         long split_start, band_start, chan_start;
1197         bool split;
1198 };
1199
1200 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1201                               struct sk_buff *msg, u32 portid, u32 seq,
1202                               int flags, struct nl80211_dump_wiphy_state *state)
1203 {
1204         void *hdr;
1205         struct nlattr *nl_bands, *nl_band;
1206         struct nlattr *nl_freqs, *nl_freq;
1207         struct nlattr *nl_cmds;
1208         enum ieee80211_band band;
1209         struct ieee80211_channel *chan;
1210         int i;
1211         const struct ieee80211_txrx_stypes *mgmt_stypes =
1212                                 dev->wiphy.mgmt_stypes;
1213         u32 features;
1214
1215         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1216         if (!hdr)
1217                 return -ENOBUFS;
1218
1219         if (WARN_ON(!state))
1220                 return -EINVAL;
1221
1222         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1223             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1224                            wiphy_name(&dev->wiphy)) ||
1225             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1226                         cfg80211_rdev_list_generation))
1227                 goto nla_put_failure;
1228
1229         switch (state->split_start) {
1230         case 0:
1231                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1232                                dev->wiphy.retry_short) ||
1233                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1234                                dev->wiphy.retry_long) ||
1235                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1236                                 dev->wiphy.frag_threshold) ||
1237                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1238                                 dev->wiphy.rts_threshold) ||
1239                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1240                                dev->wiphy.coverage_class) ||
1241                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1242                                dev->wiphy.max_scan_ssids) ||
1243                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1244                                dev->wiphy.max_sched_scan_ssids) ||
1245                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1246                                 dev->wiphy.max_scan_ie_len) ||
1247                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1248                                 dev->wiphy.max_sched_scan_ie_len) ||
1249                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1250                                dev->wiphy.max_match_sets))
1251                         goto nla_put_failure;
1252
1253                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1254                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1255                         goto nla_put_failure;
1256                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1257                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1258                         goto nla_put_failure;
1259                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1260                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1261                         goto nla_put_failure;
1262                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1263                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1264                         goto nla_put_failure;
1265                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1266                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1267                         goto nla_put_failure;
1268                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1269                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1270                         goto nla_put_failure;
1271                 state->split_start++;
1272                 if (state->split)
1273                         break;
1274         case 1:
1275                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1276                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1277                             dev->wiphy.cipher_suites))
1278                         goto nla_put_failure;
1279
1280                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1281                                dev->wiphy.max_num_pmkids))
1282                         goto nla_put_failure;
1283
1284                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1285                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1286                         goto nla_put_failure;
1287
1288                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1289                                 dev->wiphy.available_antennas_tx) ||
1290                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1291                                 dev->wiphy.available_antennas_rx))
1292                         goto nla_put_failure;
1293
1294                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1295                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1296                                 dev->wiphy.probe_resp_offload))
1297                         goto nla_put_failure;
1298
1299                 if ((dev->wiphy.available_antennas_tx ||
1300                      dev->wiphy.available_antennas_rx) &&
1301                     dev->ops->get_antenna) {
1302                         u32 tx_ant = 0, rx_ant = 0;
1303                         int res;
1304                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1305                         if (!res) {
1306                                 if (nla_put_u32(msg,
1307                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1308                                                 tx_ant) ||
1309                                     nla_put_u32(msg,
1310                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1311                                                 rx_ant))
1312                                         goto nla_put_failure;
1313                         }
1314                 }
1315
1316                 state->split_start++;
1317                 if (state->split)
1318                         break;
1319         case 2:
1320                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1321                                         dev->wiphy.interface_modes))
1322                                 goto nla_put_failure;
1323                 state->split_start++;
1324                 if (state->split)
1325                         break;
1326         case 3:
1327                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1328                 if (!nl_bands)
1329                         goto nla_put_failure;
1330
1331                 for (band = state->band_start;
1332                      band < IEEE80211_NUM_BANDS; band++) {
1333                         struct ieee80211_supported_band *sband;
1334
1335                         sband = dev->wiphy.bands[band];
1336
1337                         if (!sband)
1338                                 continue;
1339
1340                         nl_band = nla_nest_start(msg, band);
1341                         if (!nl_band)
1342                                 goto nla_put_failure;
1343
1344                         switch (state->chan_start) {
1345                         case 0:
1346                                 if (nl80211_send_band_rateinfo(msg, sband))
1347                                         goto nla_put_failure;
1348                                 state->chan_start++;
1349                                 if (state->split)
1350                                         break;
1351                         default:
1352                                 /* add frequencies */
1353                                 nl_freqs = nla_nest_start(
1354                                         msg, NL80211_BAND_ATTR_FREQS);
1355                                 if (!nl_freqs)
1356                                         goto nla_put_failure;
1357
1358                                 for (i = state->chan_start - 1;
1359                                      i < sband->n_channels;
1360                                      i++) {
1361                                         nl_freq = nla_nest_start(msg, i);
1362                                         if (!nl_freq)
1363                                                 goto nla_put_failure;
1364
1365                                         chan = &sband->channels[i];
1366
1367                                         if (nl80211_msg_put_channel(
1368                                                         msg, chan,
1369                                                         state->split))
1370                                                 goto nla_put_failure;
1371
1372                                         nla_nest_end(msg, nl_freq);
1373                                         if (state->split)
1374                                                 break;
1375                                 }
1376                                 if (i < sband->n_channels)
1377                                         state->chan_start = i + 2;
1378                                 else
1379                                         state->chan_start = 0;
1380                                 nla_nest_end(msg, nl_freqs);
1381                         }
1382
1383                         nla_nest_end(msg, nl_band);
1384
1385                         if (state->split) {
1386                                 /* start again here */
1387                                 if (state->chan_start)
1388                                         band--;
1389                                 break;
1390                         }
1391                 }
1392                 nla_nest_end(msg, nl_bands);
1393
1394                 if (band < IEEE80211_NUM_BANDS)
1395                         state->band_start = band + 1;
1396                 else
1397                         state->band_start = 0;
1398
1399                 /* if bands & channels are done, continue outside */
1400                 if (state->band_start == 0 && state->chan_start == 0)
1401                         state->split_start++;
1402                 if (state->split)
1403                         break;
1404         case 4:
1405                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1406                 if (!nl_cmds)
1407                         goto nla_put_failure;
1408
1409                 i = 0;
1410 #define CMD(op, n)                                                      \
1411                  do {                                                   \
1412                         if (dev->ops->op) {                             \
1413                                 i++;                                    \
1414                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1415                                         goto nla_put_failure;           \
1416                         }                                               \
1417                 } while (0)
1418
1419                 CMD(add_virtual_intf, NEW_INTERFACE);
1420                 CMD(change_virtual_intf, SET_INTERFACE);
1421                 CMD(add_key, NEW_KEY);
1422                 CMD(start_ap, START_AP);
1423                 CMD(add_station, NEW_STATION);
1424                 CMD(add_mpath, NEW_MPATH);
1425                 CMD(update_mesh_config, SET_MESH_CONFIG);
1426                 CMD(change_bss, SET_BSS);
1427                 CMD(auth, AUTHENTICATE);
1428                 CMD(assoc, ASSOCIATE);
1429                 CMD(deauth, DEAUTHENTICATE);
1430                 CMD(disassoc, DISASSOCIATE);
1431                 CMD(join_ibss, JOIN_IBSS);
1432                 CMD(join_mesh, JOIN_MESH);
1433                 CMD(set_pmksa, SET_PMKSA);
1434                 CMD(del_pmksa, DEL_PMKSA);
1435                 CMD(flush_pmksa, FLUSH_PMKSA);
1436                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1437                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1438                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1439                 CMD(mgmt_tx, FRAME);
1440                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1441                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1442                         i++;
1443                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1444                                 goto nla_put_failure;
1445                 }
1446                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1447                     dev->ops->join_mesh) {
1448                         i++;
1449                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1450                                 goto nla_put_failure;
1451                 }
1452                 CMD(set_wds_peer, SET_WDS_PEER);
1453                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1454                         CMD(tdls_mgmt, TDLS_MGMT);
1455                         CMD(tdls_oper, TDLS_OPER);
1456                 }
1457                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1458                         CMD(sched_scan_start, START_SCHED_SCAN);
1459                 CMD(probe_client, PROBE_CLIENT);
1460                 CMD(set_noack_map, SET_NOACK_MAP);
1461                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1462                         i++;
1463                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1464                                 goto nla_put_failure;
1465                 }
1466                 CMD(start_p2p_device, START_P2P_DEVICE);
1467                 CMD(set_mcast_rate, SET_MCAST_RATE);
1468                 if (state->split) {
1469                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1470                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1471                         if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1472                                 CMD(channel_switch, CHANNEL_SWITCH);
1473                 }
1474                 CMD(set_qos_map, SET_QOS_MAP);
1475
1476 #ifdef CONFIG_NL80211_TESTMODE
1477                 CMD(testmode_cmd, TESTMODE);
1478 #endif
1479
1480 #undef CMD
1481
1482                 if (dev->ops->connect || dev->ops->auth) {
1483                         i++;
1484                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1485                                 goto nla_put_failure;
1486                 }
1487
1488                 if (dev->ops->disconnect || dev->ops->deauth) {
1489                         i++;
1490                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1491                                 goto nla_put_failure;
1492                 }
1493
1494                 nla_nest_end(msg, nl_cmds);
1495                 state->split_start++;
1496                 if (state->split)
1497                         break;
1498         case 5:
1499                 if (dev->ops->remain_on_channel &&
1500                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1501                     nla_put_u32(msg,
1502                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1503                                 dev->wiphy.max_remain_on_channel_duration))
1504                         goto nla_put_failure;
1505
1506                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1507                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1508                         goto nla_put_failure;
1509
1510                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1511                         goto nla_put_failure;
1512                 state->split_start++;
1513                 if (state->split)
1514                         break;
1515         case 6:
1516 #ifdef CONFIG_PM
1517                 if (nl80211_send_wowlan(msg, dev, state->split))
1518                         goto nla_put_failure;
1519                 state->split_start++;
1520                 if (state->split)
1521                         break;
1522 #else
1523                 state->split_start++;
1524 #endif
1525         case 7:
1526                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1527                                         dev->wiphy.software_iftypes))
1528                         goto nla_put_failure;
1529
1530                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1531                                                    state->split))
1532                         goto nla_put_failure;
1533
1534                 state->split_start++;
1535                 if (state->split)
1536                         break;
1537         case 8:
1538                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1539                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1540                                 dev->wiphy.ap_sme_capa))
1541                         goto nla_put_failure;
1542
1543                 features = dev->wiphy.features;
1544                 /*
1545                  * We can only add the per-channel limit information if the
1546                  * dump is split, otherwise it makes it too big. Therefore
1547                  * only advertise it in that case.
1548                  */
1549                 if (state->split)
1550                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1551                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1552                         goto nla_put_failure;
1553
1554                 if (dev->wiphy.ht_capa_mod_mask &&
1555                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1556                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1557                             dev->wiphy.ht_capa_mod_mask))
1558                         goto nla_put_failure;
1559
1560                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1561                     dev->wiphy.max_acl_mac_addrs &&
1562                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1563                                 dev->wiphy.max_acl_mac_addrs))
1564                         goto nla_put_failure;
1565
1566                 /*
1567                  * Any information below this point is only available to
1568                  * applications that can deal with it being split. This
1569                  * helps ensure that newly added capabilities don't break
1570                  * older tools by overrunning their buffers.
1571                  *
1572                  * We still increment split_start so that in the split
1573                  * case we'll continue with more data in the next round,
1574                  * but break unconditionally so unsplit data stops here.
1575                  */
1576                 state->split_start++;
1577                 break;
1578         case 9:
1579                 if (dev->wiphy.extended_capabilities &&
1580                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1581                              dev->wiphy.extended_capabilities_len,
1582                              dev->wiphy.extended_capabilities) ||
1583                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1584                              dev->wiphy.extended_capabilities_len,
1585                              dev->wiphy.extended_capabilities_mask)))
1586                         goto nla_put_failure;
1587
1588                 if (dev->wiphy.vht_capa_mod_mask &&
1589                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1590                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1591                             dev->wiphy.vht_capa_mod_mask))
1592                         goto nla_put_failure;
1593
1594                 state->split_start++;
1595                 break;
1596         case 10:
1597                 if (nl80211_send_coalesce(msg, dev))
1598                         goto nla_put_failure;
1599
1600                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1601                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1602                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1603                         goto nla_put_failure;
1604
1605                 if (dev->wiphy.max_ap_assoc_sta &&
1606                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1607                                 dev->wiphy.max_ap_assoc_sta))
1608                         goto nla_put_failure;
1609
1610                 state->split_start++;
1611                 break;
1612         case 11:
1613                 if (dev->wiphy.n_vendor_commands) {
1614                         const struct nl80211_vendor_cmd_info *info;
1615                         struct nlattr *nested;
1616
1617                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1618                         if (!nested)
1619                                 goto nla_put_failure;
1620
1621                         for (i = 0; i < dev->wiphy.n_vendor_commands; i++) {
1622                                 info = &dev->wiphy.vendor_commands[i].info;
1623                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1624                                         goto nla_put_failure;
1625                         }
1626                         nla_nest_end(msg, nested);
1627                 }
1628
1629                 if (dev->wiphy.n_vendor_events) {
1630                         const struct nl80211_vendor_cmd_info *info;
1631                         struct nlattr *nested;
1632
1633                         nested = nla_nest_start(msg,
1634                                                 NL80211_ATTR_VENDOR_EVENTS);
1635                         if (!nested)
1636                                 goto nla_put_failure;
1637
1638                         for (i = 0; i < dev->wiphy.n_vendor_events; i++) {
1639                                 info = &dev->wiphy.vendor_events[i];
1640                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1641                                         goto nla_put_failure;
1642                         }
1643                         nla_nest_end(msg, nested);
1644                 }
1645
1646                 /* done */
1647                 state->split_start = 0;
1648                 break;
1649         }
1650         return genlmsg_end(msg, hdr);
1651
1652  nla_put_failure:
1653         genlmsg_cancel(msg, hdr);
1654         return -EMSGSIZE;
1655 }
1656
1657 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1658                                     struct netlink_callback *cb,
1659                                     struct nl80211_dump_wiphy_state *state)
1660 {
1661         struct nlattr **tb = nl80211_fam.attrbuf;
1662         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1663                               tb, nl80211_fam.maxattr, nl80211_policy);
1664         /* ignore parse errors for backward compatibility */
1665         if (ret)
1666                 return 0;
1667
1668         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1669         if (tb[NL80211_ATTR_WIPHY])
1670                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1671         if (tb[NL80211_ATTR_WDEV])
1672                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1673         if (tb[NL80211_ATTR_IFINDEX]) {
1674                 struct net_device *netdev;
1675                 struct cfg80211_registered_device *rdev;
1676                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1677
1678                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1679                 if (!netdev)
1680                         return -ENODEV;
1681                 if (netdev->ieee80211_ptr) {
1682                         rdev = wiphy_to_dev(
1683                                 netdev->ieee80211_ptr->wiphy);
1684                         state->filter_wiphy = rdev->wiphy_idx;
1685                 }
1686         }
1687
1688         return 0;
1689 }
1690
1691 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1692 {
1693         int idx = 0, ret;
1694         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1695         struct cfg80211_registered_device *dev;
1696
1697         rtnl_lock();
1698         if (!state) {
1699                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1700                 if (!state) {
1701                         rtnl_unlock();
1702                         return -ENOMEM;
1703                 }
1704                 state->filter_wiphy = -1;
1705                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1706                 if (ret) {
1707                         kfree(state);
1708                         rtnl_unlock();
1709                         return ret;
1710                 }
1711                 cb->args[0] = (long)state;
1712         }
1713
1714         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1715                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1716                         continue;
1717                 if (++idx <= state->start)
1718                         continue;
1719                 if (state->filter_wiphy != -1 &&
1720                     state->filter_wiphy != dev->wiphy_idx)
1721                         continue;
1722                 /* attempt to fit multiple wiphy data chunks into the skb */
1723                 do {
1724                         ret = nl80211_send_wiphy(dev, skb,
1725                                                  NETLINK_CB(cb->skb).portid,
1726                                                  cb->nlh->nlmsg_seq,
1727                                                  NLM_F_MULTI, state);
1728                         if (ret < 0) {
1729                                 /*
1730                                  * If sending the wiphy data didn't fit (ENOBUFS
1731                                  * or EMSGSIZE returned), this SKB is still
1732                                  * empty (so it's not too big because another
1733                                  * wiphy dataset is already in the skb) and
1734                                  * we've not tried to adjust the dump allocation
1735                                  * yet ... then adjust the alloc size to be
1736                                  * bigger, and return 1 but with the empty skb.
1737                                  * This results in an empty message being RX'ed
1738                                  * in userspace, but that is ignored.
1739                                  *
1740                                  * We can then retry with the larger buffer.
1741                                  */
1742                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1743                                     !skb->len && !state->split &&
1744                                     cb->min_dump_alloc < 4096) {
1745                                         cb->min_dump_alloc = 4096;
1746                                         state->split_start = 0;
1747                                         rtnl_unlock();
1748                                         return 1;
1749                                 }
1750                                 idx--;
1751                                 break;
1752                         }
1753                 } while (state->split_start > 0);
1754                 break;
1755         }
1756         rtnl_unlock();
1757
1758         state->start = idx;
1759
1760         return skb->len;
1761 }
1762
1763 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1764 {
1765         kfree((void *)cb->args[0]);
1766         return 0;
1767 }
1768
1769 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1770 {
1771         struct sk_buff *msg;
1772         struct cfg80211_registered_device *dev = info->user_ptr[0];
1773         struct nl80211_dump_wiphy_state state = {};
1774
1775         msg = nlmsg_new(4096, GFP_KERNEL);
1776         if (!msg)
1777                 return -ENOMEM;
1778
1779         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1780                                &state) < 0) {
1781                 nlmsg_free(msg);
1782                 return -ENOBUFS;
1783         }
1784
1785         return genlmsg_reply(msg, info);
1786 }
1787
1788 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1789         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1790         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1791         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1792         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1793         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1794 };
1795
1796 static int parse_txq_params(struct nlattr *tb[],
1797                             struct ieee80211_txq_params *txq_params)
1798 {
1799         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1800             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1801             !tb[NL80211_TXQ_ATTR_AIFS])
1802                 return -EINVAL;
1803
1804         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1805         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1806         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1807         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1808         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1809
1810         if (txq_params->ac >= NL80211_NUM_ACS)
1811                 return -EINVAL;
1812
1813         return 0;
1814 }
1815
1816 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1817 {
1818         /*
1819          * You can only set the channel explicitly for WDS interfaces,
1820          * all others have their channel managed via their respective
1821          * "establish a connection" command (connect, join, ...)
1822          *
1823          * For AP/GO and mesh mode, the channel can be set with the
1824          * channel userspace API, but is only stored and passed to the
1825          * low-level driver when the AP starts or the mesh is joined.
1826          * This is for backward compatibility, userspace can also give
1827          * the channel in the start-ap or join-mesh commands instead.
1828          *
1829          * Monitors are special as they are normally slaved to
1830          * whatever else is going on, so they have their own special
1831          * operation to set the monitor channel if possible.
1832          */
1833         return !wdev ||
1834                 wdev->iftype == NL80211_IFTYPE_AP ||
1835                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1836                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1837                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1838 }
1839
1840 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1841                                  struct genl_info *info,
1842                                  struct cfg80211_chan_def *chandef)
1843 {
1844         u32 control_freq;
1845
1846         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1847                 return -EINVAL;
1848
1849         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1850
1851         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1852         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1853         chandef->center_freq1 = control_freq;
1854         chandef->center_freq2 = 0;
1855
1856         /* Primary channel not allowed */
1857         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1858                 return -EINVAL;
1859
1860         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1861                 enum nl80211_channel_type chantype;
1862
1863                 chantype = nla_get_u32(
1864                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1865
1866                 switch (chantype) {
1867                 case NL80211_CHAN_NO_HT:
1868                 case NL80211_CHAN_HT20:
1869                 case NL80211_CHAN_HT40PLUS:
1870                 case NL80211_CHAN_HT40MINUS:
1871                         cfg80211_chandef_create(chandef, chandef->chan,
1872                                                 chantype);
1873                         break;
1874                 default:
1875                         return -EINVAL;
1876                 }
1877         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1878                 chandef->width =
1879                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1880                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1881                         chandef->center_freq1 =
1882                                 nla_get_u32(
1883                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1884                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1885                         chandef->center_freq2 =
1886                                 nla_get_u32(
1887                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1888         }
1889
1890         if (!cfg80211_chandef_valid(chandef))
1891                 return -EINVAL;
1892
1893         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1894                                      IEEE80211_CHAN_DISABLED))
1895                 return -EINVAL;
1896
1897         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1898              chandef->width == NL80211_CHAN_WIDTH_10) &&
1899             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1900                 return -EINVAL;
1901
1902         return 0;
1903 }
1904
1905 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1906                                  struct wireless_dev *wdev,
1907                                  struct genl_info *info)
1908 {
1909         struct cfg80211_chan_def chandef;
1910         int result;
1911         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1912
1913         if (wdev)
1914                 iftype = wdev->iftype;
1915
1916         if (!nl80211_can_set_dev_channel(wdev))
1917                 return -EOPNOTSUPP;
1918
1919         result = nl80211_parse_chandef(rdev, info, &chandef);
1920         if (result)
1921                 return result;
1922
1923         switch (iftype) {
1924         case NL80211_IFTYPE_AP:
1925         case NL80211_IFTYPE_P2P_GO:
1926                 if (wdev->beacon_interval) {
1927                         result = -EBUSY;
1928                         break;
1929                 }
1930                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1931                         result = -EINVAL;
1932                         break;
1933                 }
1934                 wdev->preset_chandef = chandef;
1935                 result = 0;
1936                 break;
1937         case NL80211_IFTYPE_MESH_POINT:
1938                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1939                 break;
1940         case NL80211_IFTYPE_MONITOR:
1941                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1942                 break;
1943         default:
1944                 result = -EINVAL;
1945         }
1946
1947         return result;
1948 }
1949
1950 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1951 {
1952         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1953         struct net_device *netdev = info->user_ptr[1];
1954
1955         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1956 }
1957
1958 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1959 {
1960         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1961         struct net_device *dev = info->user_ptr[1];
1962         struct wireless_dev *wdev = dev->ieee80211_ptr;
1963         const u8 *bssid;
1964
1965         if (!info->attrs[NL80211_ATTR_MAC])
1966                 return -EINVAL;
1967
1968         if (netif_running(dev))
1969                 return -EBUSY;
1970
1971         if (!rdev->ops->set_wds_peer)
1972                 return -EOPNOTSUPP;
1973
1974         if (wdev->iftype != NL80211_IFTYPE_WDS)
1975                 return -EOPNOTSUPP;
1976
1977         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1978         return rdev_set_wds_peer(rdev, dev, bssid);
1979 }
1980
1981
1982 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1983 {
1984         struct cfg80211_registered_device *rdev;
1985         struct net_device *netdev = NULL;
1986         struct wireless_dev *wdev;
1987         int result = 0, rem_txq_params = 0;
1988         struct nlattr *nl_txq_params;
1989         u32 changed;
1990         u8 retry_short = 0, retry_long = 0;
1991         u32 frag_threshold = 0, rts_threshold = 0;
1992         u8 coverage_class = 0;
1993
1994         ASSERT_RTNL();
1995
1996         /*
1997          * Try to find the wiphy and netdev. Normally this
1998          * function shouldn't need the netdev, but this is
1999          * done for backward compatibility -- previously
2000          * setting the channel was done per wiphy, but now
2001          * it is per netdev. Previous userland like hostapd
2002          * also passed a netdev to set_wiphy, so that it is
2003          * possible to let that go to the right netdev!
2004          */
2005
2006         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2007                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2008
2009                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2010                 if (netdev && netdev->ieee80211_ptr)
2011                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
2012                 else
2013                         netdev = NULL;
2014         }
2015
2016         if (!netdev) {
2017                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2018                                                   info->attrs);
2019                 if (IS_ERR(rdev))
2020                         return PTR_ERR(rdev);
2021                 wdev = NULL;
2022                 netdev = NULL;
2023                 result = 0;
2024         } else
2025                 wdev = netdev->ieee80211_ptr;
2026
2027         /*
2028          * end workaround code, by now the rdev is available
2029          * and locked, and wdev may or may not be NULL.
2030          */
2031
2032         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2033                 result = cfg80211_dev_rename(
2034                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2035
2036         if (result)
2037                 return result;
2038
2039         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2040                 struct ieee80211_txq_params txq_params;
2041                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2042
2043                 if (!rdev->ops->set_txq_params)
2044                         return -EOPNOTSUPP;
2045
2046                 if (!netdev)
2047                         return -EINVAL;
2048
2049                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2050                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2051                         return -EINVAL;
2052
2053                 if (!netif_running(netdev))
2054                         return -ENETDOWN;
2055
2056                 nla_for_each_nested(nl_txq_params,
2057                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2058                                     rem_txq_params) {
2059                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2060                                            nla_data(nl_txq_params),
2061                                            nla_len(nl_txq_params),
2062                                            txq_params_policy);
2063                         if (result)
2064                                 return result;
2065                         result = parse_txq_params(tb, &txq_params);
2066                         if (result)
2067                                 return result;
2068
2069                         result = rdev_set_txq_params(rdev, netdev,
2070                                                      &txq_params);
2071                         if (result)
2072                                 return result;
2073                 }
2074         }
2075
2076         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2077                 result = __nl80211_set_channel(rdev,
2078                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
2079                                 info);
2080                 if (result)
2081                         return result;
2082         }
2083
2084         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2085                 struct wireless_dev *txp_wdev = wdev;
2086                 enum nl80211_tx_power_setting type;
2087                 int idx, mbm = 0;
2088
2089                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2090                         txp_wdev = NULL;
2091
2092                 if (!rdev->ops->set_tx_power)
2093                         return -EOPNOTSUPP;
2094
2095                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2096                 type = nla_get_u32(info->attrs[idx]);
2097
2098                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2099                     (type != NL80211_TX_POWER_AUTOMATIC))
2100                         return -EINVAL;
2101
2102                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2103                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2104                         mbm = nla_get_u32(info->attrs[idx]);
2105                 }
2106
2107                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2108                 if (result)
2109                         return result;
2110         }
2111
2112         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2113             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2114                 u32 tx_ant, rx_ant;
2115                 if ((!rdev->wiphy.available_antennas_tx &&
2116                      !rdev->wiphy.available_antennas_rx) ||
2117                     !rdev->ops->set_antenna)
2118                         return -EOPNOTSUPP;
2119
2120                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2121                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2122
2123                 /* reject antenna configurations which don't match the
2124                  * available antenna masks, except for the "all" mask */
2125                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2126                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2127                         return -EINVAL;
2128
2129                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2130                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2131
2132                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2133                 if (result)
2134                         return result;
2135         }
2136
2137         changed = 0;
2138
2139         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2140                 retry_short = nla_get_u8(
2141                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2142                 if (retry_short == 0)
2143                         return -EINVAL;
2144
2145                 changed |= WIPHY_PARAM_RETRY_SHORT;
2146         }
2147
2148         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2149                 retry_long = nla_get_u8(
2150                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2151                 if (retry_long == 0)
2152                         return -EINVAL;
2153
2154                 changed |= WIPHY_PARAM_RETRY_LONG;
2155         }
2156
2157         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2158                 frag_threshold = nla_get_u32(
2159                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2160                 if (frag_threshold < 256)
2161                         return -EINVAL;
2162
2163                 if (frag_threshold != (u32) -1) {
2164                         /*
2165                          * Fragments (apart from the last one) are required to
2166                          * have even length. Make the fragmentation code
2167                          * simpler by stripping LSB should someone try to use
2168                          * odd threshold value.
2169                          */
2170                         frag_threshold &= ~0x1;
2171                 }
2172                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2173         }
2174
2175         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2176                 rts_threshold = nla_get_u32(
2177                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2178                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2179         }
2180
2181         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2182                 coverage_class = nla_get_u8(
2183                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2184                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2185         }
2186
2187         if (changed) {
2188                 u8 old_retry_short, old_retry_long;
2189                 u32 old_frag_threshold, old_rts_threshold;
2190                 u8 old_coverage_class;
2191
2192                 if (!rdev->ops->set_wiphy_params)
2193                         return -EOPNOTSUPP;
2194
2195                 old_retry_short = rdev->wiphy.retry_short;
2196                 old_retry_long = rdev->wiphy.retry_long;
2197                 old_frag_threshold = rdev->wiphy.frag_threshold;
2198                 old_rts_threshold = rdev->wiphy.rts_threshold;
2199                 old_coverage_class = rdev->wiphy.coverage_class;
2200
2201                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2202                         rdev->wiphy.retry_short = retry_short;
2203                 if (changed & WIPHY_PARAM_RETRY_LONG)
2204                         rdev->wiphy.retry_long = retry_long;
2205                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2206                         rdev->wiphy.frag_threshold = frag_threshold;
2207                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2208                         rdev->wiphy.rts_threshold = rts_threshold;
2209                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2210                         rdev->wiphy.coverage_class = coverage_class;
2211
2212                 result = rdev_set_wiphy_params(rdev, changed);
2213                 if (result) {
2214                         rdev->wiphy.retry_short = old_retry_short;
2215                         rdev->wiphy.retry_long = old_retry_long;
2216                         rdev->wiphy.frag_threshold = old_frag_threshold;
2217                         rdev->wiphy.rts_threshold = old_rts_threshold;
2218                         rdev->wiphy.coverage_class = old_coverage_class;
2219                 }
2220         }
2221         return 0;
2222 }
2223
2224 static inline u64 wdev_id(struct wireless_dev *wdev)
2225 {
2226         return (u64)wdev->identifier |
2227                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2228 }
2229
2230 static int nl80211_send_chandef(struct sk_buff *msg,
2231                                 const struct cfg80211_chan_def *chandef)
2232 {
2233         WARN_ON(!cfg80211_chandef_valid(chandef));
2234
2235         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2236                         chandef->chan->center_freq))
2237                 return -ENOBUFS;
2238         switch (chandef->width) {
2239         case NL80211_CHAN_WIDTH_20_NOHT:
2240         case NL80211_CHAN_WIDTH_20:
2241         case NL80211_CHAN_WIDTH_40:
2242                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2243                                 cfg80211_get_chandef_type(chandef)))
2244                         return -ENOBUFS;
2245                 break;
2246         default:
2247                 break;
2248         }
2249         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2250                 return -ENOBUFS;
2251         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2252                 return -ENOBUFS;
2253         if (chandef->center_freq2 &&
2254             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2255                 return -ENOBUFS;
2256         return 0;
2257 }
2258
2259 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2260                               struct cfg80211_registered_device *rdev,
2261                               struct wireless_dev *wdev)
2262 {
2263         struct net_device *dev = wdev->netdev;
2264         void *hdr;
2265
2266         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2267         if (!hdr)
2268                 return -1;
2269
2270         if (dev &&
2271             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2272              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2273                 goto nla_put_failure;
2274
2275         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2276             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2277             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2278             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2279             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2280                         rdev->devlist_generation ^
2281                         (cfg80211_rdev_list_generation << 2)))
2282                 goto nla_put_failure;
2283
2284         if (rdev->ops->get_channel) {
2285                 int ret;
2286                 struct cfg80211_chan_def chandef;
2287
2288                 ret = rdev_get_channel(rdev, wdev, &chandef);
2289                 if (ret == 0) {
2290                         if (nl80211_send_chandef(msg, &chandef))
2291                                 goto nla_put_failure;
2292                 }
2293         }
2294
2295         if (wdev->ssid_len) {
2296                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2297                         goto nla_put_failure;
2298         }
2299
2300         return genlmsg_end(msg, hdr);
2301
2302  nla_put_failure:
2303         genlmsg_cancel(msg, hdr);
2304         return -EMSGSIZE;
2305 }
2306
2307 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2308 {
2309         int wp_idx = 0;
2310         int if_idx = 0;
2311         int wp_start = cb->args[0];
2312         int if_start = cb->args[1];
2313         struct cfg80211_registered_device *rdev;
2314         struct wireless_dev *wdev;
2315
2316         rtnl_lock();
2317         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2318                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2319                         continue;
2320                 if (wp_idx < wp_start) {
2321                         wp_idx++;
2322                         continue;
2323                 }
2324                 if_idx = 0;
2325
2326                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2327                         if (if_idx < if_start) {
2328                                 if_idx++;
2329                                 continue;
2330                         }
2331                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2332                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2333                                                rdev, wdev) < 0) {
2334                                 goto out;
2335                         }
2336                         if_idx++;
2337                 }
2338
2339                 wp_idx++;
2340         }
2341  out:
2342         rtnl_unlock();
2343
2344         cb->args[0] = wp_idx;
2345         cb->args[1] = if_idx;
2346
2347         return skb->len;
2348 }
2349
2350 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2351 {
2352         struct sk_buff *msg;
2353         struct cfg80211_registered_device *dev = info->user_ptr[0];
2354         struct wireless_dev *wdev = info->user_ptr[1];
2355
2356         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2357         if (!msg)
2358                 return -ENOMEM;
2359
2360         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2361                                dev, wdev) < 0) {
2362                 nlmsg_free(msg);
2363                 return -ENOBUFS;
2364         }
2365
2366         return genlmsg_reply(msg, info);
2367 }
2368
2369 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2370         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2371         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2372         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2373         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2374         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2375         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2376 };
2377
2378 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2379 {
2380         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2381         int flag;
2382
2383         *mntrflags = 0;
2384
2385         if (!nla)
2386                 return -EINVAL;
2387
2388         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2389                              nla, mntr_flags_policy))
2390                 return -EINVAL;
2391
2392         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2393                 if (flags[flag])
2394                         *mntrflags |= (1<<flag);
2395
2396         return 0;
2397 }
2398
2399 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2400                                struct net_device *netdev, u8 use_4addr,
2401                                enum nl80211_iftype iftype)
2402 {
2403         if (!use_4addr) {
2404                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2405                         return -EBUSY;
2406                 return 0;
2407         }
2408
2409         switch (iftype) {
2410         case NL80211_IFTYPE_AP_VLAN:
2411                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2412                         return 0;
2413                 break;
2414         case NL80211_IFTYPE_STATION:
2415                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2416                         return 0;
2417                 break;
2418         default:
2419                 break;
2420         }
2421
2422         return -EOPNOTSUPP;
2423 }
2424
2425 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2426 {
2427         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2428         struct vif_params params;
2429         int err;
2430         enum nl80211_iftype otype, ntype;
2431         struct net_device *dev = info->user_ptr[1];
2432         u32 _flags, *flags = NULL;
2433         bool change = false;
2434
2435         memset(&params, 0, sizeof(params));
2436
2437         otype = ntype = dev->ieee80211_ptr->iftype;
2438
2439         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2440                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2441                 if (otype != ntype)
2442                         change = true;
2443                 if (ntype > NL80211_IFTYPE_MAX)
2444                         return -EINVAL;
2445         }
2446
2447         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2448                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2449
2450                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2451                         return -EINVAL;
2452                 if (netif_running(dev))
2453                         return -EBUSY;
2454
2455                 wdev_lock(wdev);
2456                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2457                              IEEE80211_MAX_MESH_ID_LEN);
2458                 wdev->mesh_id_up_len =
2459                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2460                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2461                        wdev->mesh_id_up_len);
2462                 wdev_unlock(wdev);
2463         }
2464
2465         if (info->attrs[NL80211_ATTR_4ADDR]) {
2466                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2467                 change = true;
2468                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2469                 if (err)
2470                         return err;
2471         } else {
2472                 params.use_4addr = -1;
2473         }
2474
2475         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2476                 if (ntype != NL80211_IFTYPE_MONITOR)
2477                         return -EINVAL;
2478                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2479                                           &_flags);
2480                 if (err)
2481                         return err;
2482
2483                 flags = &_flags;
2484                 change = true;
2485         }
2486
2487         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2488             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2489                 return -EOPNOTSUPP;
2490
2491         if (change)
2492                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2493         else
2494                 err = 0;
2495
2496         if (!err && params.use_4addr != -1)
2497                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2498
2499         return err;
2500 }
2501
2502 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2503 {
2504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2505         struct vif_params params;
2506         struct wireless_dev *wdev;
2507         struct sk_buff *msg;
2508         int err;
2509         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2510         u32 flags;
2511
2512         memset(&params, 0, sizeof(params));
2513
2514         if (!info->attrs[NL80211_ATTR_IFNAME])
2515                 return -EINVAL;
2516
2517         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2518                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2519                 if (type > NL80211_IFTYPE_MAX)
2520                         return -EINVAL;
2521         }
2522
2523         if (!rdev->ops->add_virtual_intf ||
2524             !(rdev->wiphy.interface_modes & (1 << type)))
2525                 return -EOPNOTSUPP;
2526
2527         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2528                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2529                            ETH_ALEN);
2530                 if (!is_valid_ether_addr(params.macaddr))
2531                         return -EADDRNOTAVAIL;
2532         }
2533
2534         if (info->attrs[NL80211_ATTR_4ADDR]) {
2535                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2536                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2537                 if (err)
2538                         return err;
2539         }
2540
2541         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2542         if (!msg)
2543                 return -ENOMEM;
2544
2545         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2546                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2547                                   &flags);
2548
2549         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2550             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2551                 return -EOPNOTSUPP;
2552
2553         wdev = rdev_add_virtual_intf(rdev,
2554                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2555                                 type, err ? NULL : &flags, &params);
2556         if (IS_ERR(wdev)) {
2557                 nlmsg_free(msg);
2558                 return PTR_ERR(wdev);
2559         }
2560
2561         switch (type) {
2562         case NL80211_IFTYPE_MESH_POINT:
2563                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2564                         break;
2565                 wdev_lock(wdev);
2566                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2567                              IEEE80211_MAX_MESH_ID_LEN);
2568                 wdev->mesh_id_up_len =
2569                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2570                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2571                        wdev->mesh_id_up_len);
2572                 wdev_unlock(wdev);
2573                 break;
2574         case NL80211_IFTYPE_P2P_DEVICE:
2575                 /*
2576                  * P2P Device doesn't have a netdev, so doesn't go
2577                  * through the netdev notifier and must be added here
2578                  */
2579                 mutex_init(&wdev->mtx);
2580                 INIT_LIST_HEAD(&wdev->event_list);
2581                 spin_lock_init(&wdev->event_lock);
2582                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2583                 spin_lock_init(&wdev->mgmt_registrations_lock);
2584
2585                 wdev->identifier = ++rdev->wdev_id;
2586                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2587                 rdev->devlist_generation++;
2588                 break;
2589         default:
2590                 break;
2591         }
2592
2593         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2594                                rdev, wdev) < 0) {
2595                 nlmsg_free(msg);
2596                 return -ENOBUFS;
2597         }
2598
2599         return genlmsg_reply(msg, info);
2600 }
2601
2602 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2603 {
2604         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2605         struct wireless_dev *wdev = info->user_ptr[1];
2606
2607         if (!rdev->ops->del_virtual_intf)
2608                 return -EOPNOTSUPP;
2609
2610         /*
2611          * If we remove a wireless device without a netdev then clear
2612          * user_ptr[1] so that nl80211_post_doit won't dereference it
2613          * to check if it needs to do dev_put(). Otherwise it crashes
2614          * since the wdev has been freed, unlike with a netdev where
2615          * we need the dev_put() for the netdev to really be freed.
2616          */
2617         if (!wdev->netdev)
2618                 info->user_ptr[1] = NULL;
2619
2620         return rdev_del_virtual_intf(rdev, wdev);
2621 }
2622
2623 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2624 {
2625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2626         struct net_device *dev = info->user_ptr[1];
2627         u16 noack_map;
2628
2629         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2630                 return -EINVAL;
2631
2632         if (!rdev->ops->set_noack_map)
2633                 return -EOPNOTSUPP;
2634
2635         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2636
2637         return rdev_set_noack_map(rdev, dev, noack_map);
2638 }
2639
2640 struct get_key_cookie {
2641         struct sk_buff *msg;
2642         int error;
2643         int idx;
2644 };
2645
2646 static void get_key_callback(void *c, struct key_params *params)
2647 {
2648         struct nlattr *key;
2649         struct get_key_cookie *cookie = c;
2650
2651         if ((params->key &&
2652              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2653                      params->key_len, params->key)) ||
2654             (params->seq &&
2655              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2656                      params->seq_len, params->seq)) ||
2657             (params->cipher &&
2658              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2659                          params->cipher)))
2660                 goto nla_put_failure;
2661
2662         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2663         if (!key)
2664                 goto nla_put_failure;
2665
2666         if ((params->key &&
2667              nla_put(cookie->msg, NL80211_KEY_DATA,
2668                      params->key_len, params->key)) ||
2669             (params->seq &&
2670              nla_put(cookie->msg, NL80211_KEY_SEQ,
2671                      params->seq_len, params->seq)) ||
2672             (params->cipher &&
2673              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2674                          params->cipher)))
2675                 goto nla_put_failure;
2676
2677         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2678                 goto nla_put_failure;
2679
2680         nla_nest_end(cookie->msg, key);
2681
2682         return;
2683  nla_put_failure:
2684         cookie->error = 1;
2685 }
2686
2687 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2688 {
2689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2690         int err;
2691         struct net_device *dev = info->user_ptr[1];
2692         u8 key_idx = 0;
2693         const u8 *mac_addr = NULL;
2694         bool pairwise;
2695         struct get_key_cookie cookie = {
2696                 .error = 0,
2697         };
2698         void *hdr;
2699         struct sk_buff *msg;
2700
2701         if (info->attrs[NL80211_ATTR_KEY_IDX])
2702                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2703
2704         if (key_idx > 5)
2705                 return -EINVAL;
2706
2707         if (info->attrs[NL80211_ATTR_MAC])
2708                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2709
2710         pairwise = !!mac_addr;
2711         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2712                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2713                 if (kt >= NUM_NL80211_KEYTYPES)
2714                         return -EINVAL;
2715                 if (kt != NL80211_KEYTYPE_GROUP &&
2716                     kt != NL80211_KEYTYPE_PAIRWISE)
2717                         return -EINVAL;
2718                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2719         }
2720
2721         if (!rdev->ops->get_key)
2722                 return -EOPNOTSUPP;
2723
2724         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2725         if (!msg)
2726                 return -ENOMEM;
2727
2728         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2729                              NL80211_CMD_NEW_KEY);
2730         if (!hdr)
2731                 goto nla_put_failure;
2732
2733         cookie.msg = msg;
2734         cookie.idx = key_idx;
2735
2736         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2737             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2738                 goto nla_put_failure;
2739         if (mac_addr &&
2740             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2741                 goto nla_put_failure;
2742
2743         if (pairwise && mac_addr &&
2744             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2745                 return -ENOENT;
2746
2747         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2748                            get_key_callback);
2749
2750         if (err)
2751                 goto free_msg;
2752
2753         if (cookie.error)
2754                 goto nla_put_failure;
2755
2756         genlmsg_end(msg, hdr);
2757         return genlmsg_reply(msg, info);
2758
2759  nla_put_failure:
2760         err = -ENOBUFS;
2761  free_msg:
2762         nlmsg_free(msg);
2763         return err;
2764 }
2765
2766 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2767 {
2768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2769         struct key_parse key;
2770         int err;
2771         struct net_device *dev = info->user_ptr[1];
2772
2773         err = nl80211_parse_key(info, &key);
2774         if (err)
2775                 return err;
2776
2777         if (key.idx < 0)
2778                 return -EINVAL;
2779
2780         /* only support setting default key */
2781         if (!key.def && !key.defmgmt)
2782                 return -EINVAL;
2783
2784         wdev_lock(dev->ieee80211_ptr);
2785
2786         if (key.def) {
2787                 if (!rdev->ops->set_default_key) {
2788                         err = -EOPNOTSUPP;
2789                         goto out;
2790                 }
2791
2792                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2793                 if (err)
2794                         goto out;
2795
2796                 err = rdev_set_default_key(rdev, dev, key.idx,
2797                                                  key.def_uni, key.def_multi);
2798
2799                 if (err)
2800                         goto out;
2801
2802 #ifdef CONFIG_CFG80211_WEXT
2803                 dev->ieee80211_ptr->wext.default_key = key.idx;
2804 #endif
2805         } else {
2806                 if (key.def_uni || !key.def_multi) {
2807                         err = -EINVAL;
2808                         goto out;
2809                 }
2810
2811                 if (!rdev->ops->set_default_mgmt_key) {
2812                         err = -EOPNOTSUPP;
2813                         goto out;
2814                 }
2815
2816                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2817                 if (err)
2818                         goto out;
2819
2820                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2821                 if (err)
2822                         goto out;
2823
2824 #ifdef CONFIG_CFG80211_WEXT
2825                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2826 #endif
2827         }
2828
2829  out:
2830         wdev_unlock(dev->ieee80211_ptr);
2831
2832         return err;
2833 }
2834
2835 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2836 {
2837         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2838         int err;
2839         struct net_device *dev = info->user_ptr[1];
2840         struct key_parse key;
2841         const u8 *mac_addr = NULL;
2842
2843         err = nl80211_parse_key(info, &key);
2844         if (err)
2845                 return err;
2846
2847         if (!key.p.key)
2848                 return -EINVAL;
2849
2850         if (info->attrs[NL80211_ATTR_MAC])
2851                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2852
2853         if (key.type == -1) {
2854                 if (mac_addr)
2855                         key.type = NL80211_KEYTYPE_PAIRWISE;
2856                 else
2857                         key.type = NL80211_KEYTYPE_GROUP;
2858         }
2859
2860         /* for now */
2861         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2862             key.type != NL80211_KEYTYPE_GROUP)
2863                 return -EINVAL;
2864
2865         if (!rdev->ops->add_key)
2866                 return -EOPNOTSUPP;
2867
2868         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2869                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2870                                            mac_addr))
2871                 return -EINVAL;
2872
2873         wdev_lock(dev->ieee80211_ptr);
2874         err = nl80211_key_allowed(dev->ieee80211_ptr);
2875         if (!err)
2876                 err = rdev_add_key(rdev, dev, key.idx,
2877                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2878                                     mac_addr, &key.p);
2879         wdev_unlock(dev->ieee80211_ptr);
2880
2881         return err;
2882 }
2883
2884 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2885 {
2886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2887         int err;
2888         struct net_device *dev = info->user_ptr[1];
2889         u8 *mac_addr = NULL;
2890         struct key_parse key;
2891
2892         err = nl80211_parse_key(info, &key);
2893         if (err)
2894                 return err;
2895
2896         if (info->attrs[NL80211_ATTR_MAC])
2897                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2898
2899         if (key.type == -1) {
2900                 if (mac_addr)
2901                         key.type = NL80211_KEYTYPE_PAIRWISE;
2902                 else
2903                         key.type = NL80211_KEYTYPE_GROUP;
2904         }
2905
2906         /* for now */
2907         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2908             key.type != NL80211_KEYTYPE_GROUP)
2909                 return -EINVAL;
2910
2911         if (!rdev->ops->del_key)
2912                 return -EOPNOTSUPP;
2913
2914         wdev_lock(dev->ieee80211_ptr);
2915         err = nl80211_key_allowed(dev->ieee80211_ptr);
2916
2917         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2918             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2919                 err = -ENOENT;
2920
2921         if (!err)
2922                 err = rdev_del_key(rdev, dev, key.idx,
2923                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2924                                    mac_addr);
2925
2926 #ifdef CONFIG_CFG80211_WEXT
2927         if (!err) {
2928                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2929                         dev->ieee80211_ptr->wext.default_key = -1;
2930                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2931                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2932         }
2933 #endif
2934         wdev_unlock(dev->ieee80211_ptr);
2935
2936         return err;
2937 }
2938
2939 /* This function returns an error or the number of nested attributes */
2940 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2941 {
2942         struct nlattr *attr;
2943         int n_entries = 0, tmp;
2944
2945         nla_for_each_nested(attr, nl_attr, tmp) {
2946                 if (nla_len(attr) != ETH_ALEN)
2947                         return -EINVAL;
2948
2949                 n_entries++;
2950         }
2951
2952         return n_entries;
2953 }
2954
2955 /*
2956  * This function parses ACL information and allocates memory for ACL data.
2957  * On successful return, the calling function is responsible to free the
2958  * ACL buffer returned by this function.
2959  */
2960 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2961                                                 struct genl_info *info)
2962 {
2963         enum nl80211_acl_policy acl_policy;
2964         struct nlattr *attr;
2965         struct cfg80211_acl_data *acl;
2966         int i = 0, n_entries, tmp;
2967
2968         if (!wiphy->max_acl_mac_addrs)
2969                 return ERR_PTR(-EOPNOTSUPP);
2970
2971         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2972                 return ERR_PTR(-EINVAL);
2973
2974         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2975         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2976             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2977                 return ERR_PTR(-EINVAL);
2978
2979         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2980                 return ERR_PTR(-EINVAL);
2981
2982         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2983         if (n_entries < 0)
2984                 return ERR_PTR(n_entries);
2985
2986         if (n_entries > wiphy->max_acl_mac_addrs)
2987                 return ERR_PTR(-ENOTSUPP);
2988
2989         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2990                       GFP_KERNEL);
2991         if (!acl)
2992                 return ERR_PTR(-ENOMEM);
2993
2994         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2995                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2996                 i++;
2997         }
2998
2999         acl->n_acl_entries = n_entries;
3000         acl->acl_policy = acl_policy;
3001
3002         return acl;
3003 }
3004
3005 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3006 {
3007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3008         struct net_device *dev = info->user_ptr[1];
3009         struct cfg80211_acl_data *acl;
3010         int err;
3011
3012         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3013             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3014                 return -EOPNOTSUPP;
3015
3016         if (!dev->ieee80211_ptr->beacon_interval)
3017                 return -EINVAL;
3018
3019         acl = parse_acl_data(&rdev->wiphy, info);
3020         if (IS_ERR(acl))
3021                 return PTR_ERR(acl);
3022
3023         err = rdev_set_mac_acl(rdev, dev, acl);
3024
3025         kfree(acl);
3026
3027         return err;
3028 }
3029
3030 static int nl80211_parse_beacon(struct nlattr *attrs[],
3031                                 struct cfg80211_beacon_data *bcn)
3032 {
3033         bool haveinfo = false;
3034
3035         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3036             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3037             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3038             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3039                 return -EINVAL;
3040
3041         memset(bcn, 0, sizeof(*bcn));
3042
3043         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3044                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3045                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3046                 if (!bcn->head_len)
3047                         return -EINVAL;
3048                 haveinfo = true;
3049         }
3050
3051         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3052                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3053                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3054                 haveinfo = true;
3055         }
3056
3057         if (!haveinfo)
3058                 return -EINVAL;
3059
3060         if (attrs[NL80211_ATTR_IE]) {
3061                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3062                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3063         }
3064
3065         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3066                 bcn->proberesp_ies =
3067                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3068                 bcn->proberesp_ies_len =
3069                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3070         }
3071
3072         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3073                 bcn->assocresp_ies =
3074                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3075                 bcn->assocresp_ies_len =
3076                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3077         }
3078
3079         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3080                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3081                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3082         }
3083
3084         return 0;
3085 }
3086
3087 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3088                                    struct cfg80211_ap_settings *params)
3089 {
3090         struct wireless_dev *wdev;
3091         bool ret = false;
3092
3093         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3094                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3095                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3096                         continue;
3097
3098                 if (!wdev->preset_chandef.chan)
3099                         continue;
3100
3101                 params->chandef = wdev->preset_chandef;
3102                 ret = true;
3103                 break;
3104         }
3105
3106         return ret;
3107 }
3108
3109 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3110                                     enum nl80211_auth_type auth_type,
3111                                     enum nl80211_commands cmd)
3112 {
3113         if (auth_type > NL80211_AUTHTYPE_MAX)
3114                 return false;
3115
3116         switch (cmd) {
3117         case NL80211_CMD_AUTHENTICATE:
3118                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3119                     auth_type == NL80211_AUTHTYPE_SAE)
3120                         return false;
3121                 return true;
3122         case NL80211_CMD_CONNECT:
3123         case NL80211_CMD_START_AP:
3124                 /* SAE not supported yet */
3125                 if (auth_type == NL80211_AUTHTYPE_SAE)
3126                         return false;
3127                 return true;
3128         default:
3129                 return false;
3130         }
3131 }
3132
3133 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3134 {
3135         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3136         struct net_device *dev = info->user_ptr[1];
3137         struct wireless_dev *wdev = dev->ieee80211_ptr;
3138         struct cfg80211_ap_settings params;
3139         int err;
3140         u8 radar_detect_width = 0;
3141
3142         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3143             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3144                 return -EOPNOTSUPP;
3145
3146         if (!rdev->ops->start_ap)
3147                 return -EOPNOTSUPP;
3148
3149         if (wdev->beacon_interval)
3150                 return -EALREADY;
3151
3152         memset(&params, 0, sizeof(params));
3153
3154         /* these are required for START_AP */
3155         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3156             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3157             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3158                 return -EINVAL;
3159
3160         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3161         if (err)
3162                 return err;
3163
3164         params.beacon_interval =
3165                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3166         params.dtim_period =
3167                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3168
3169         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3170         if (err)
3171                 return err;
3172
3173         /*
3174          * In theory, some of these attributes should be required here
3175          * but since they were not used when the command was originally
3176          * added, keep them optional for old user space programs to let
3177          * them continue to work with drivers that do not need the
3178          * additional information -- drivers must check!
3179          */
3180         if (info->attrs[NL80211_ATTR_SSID]) {
3181                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3182                 params.ssid_len =
3183                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3184                 if (params.ssid_len == 0 ||
3185                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3186                         return -EINVAL;
3187         }
3188
3189         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3190                 params.hidden_ssid = nla_get_u32(
3191                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3192                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3193                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3194                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3195                         return -EINVAL;
3196         }
3197
3198         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3199
3200         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3201                 params.auth_type = nla_get_u32(
3202                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3203                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3204                                              NL80211_CMD_START_AP))
3205                         return -EINVAL;
3206         } else
3207                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3208
3209         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3210                                       NL80211_MAX_NR_CIPHER_SUITES);
3211         if (err)
3212                 return err;
3213
3214         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3215                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3216                         return -EOPNOTSUPP;
3217                 params.inactivity_timeout = nla_get_u16(
3218                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3219         }
3220
3221         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3222                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3223                         return -EINVAL;
3224                 params.p2p_ctwindow =
3225                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3226                 if (params.p2p_ctwindow > 127)
3227                         return -EINVAL;
3228                 if (params.p2p_ctwindow != 0 &&
3229                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3230                         return -EINVAL;
3231         }
3232
3233         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3234                 u8 tmp;
3235
3236                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3237                         return -EINVAL;
3238                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3239                 if (tmp > 1)
3240                         return -EINVAL;
3241                 params.p2p_opp_ps = tmp;
3242                 if (params.p2p_opp_ps != 0 &&
3243                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3244                         return -EINVAL;
3245         }
3246
3247         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3248                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3249                 if (err)
3250                         return err;
3251         } else if (wdev->preset_chandef.chan) {
3252                 params.chandef = wdev->preset_chandef;
3253         } else if (!nl80211_get_ap_channel(rdev, &params))
3254                 return -EINVAL;
3255
3256         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3257                 return -EINVAL;
3258
3259         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3260         if (err < 0)
3261                 return err;
3262         if (err) {
3263                 radar_detect_width = BIT(params.chandef.width);
3264                 params.radar_required = true;
3265         }
3266
3267         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3268                                            params.chandef.chan,
3269                                            CHAN_MODE_SHARED,
3270                                            radar_detect_width);
3271         if (err)
3272                 return err;
3273
3274         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3275                 params.acl = parse_acl_data(&rdev->wiphy, info);
3276                 if (IS_ERR(params.acl))
3277                         return PTR_ERR(params.acl);
3278         }
3279
3280         wdev_lock(wdev);
3281         err = rdev_start_ap(rdev, dev, &params);
3282         if (!err) {
3283                 wdev->preset_chandef = params.chandef;
3284                 wdev->beacon_interval = params.beacon_interval;
3285                 wdev->chandef = params.chandef;
3286                 wdev->ssid_len = params.ssid_len;
3287                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3288         }
3289         wdev_unlock(wdev);
3290
3291         kfree(params.acl);
3292
3293         return err;
3294 }
3295
3296 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3297 {
3298         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3299         struct net_device *dev = info->user_ptr[1];
3300         struct wireless_dev *wdev = dev->ieee80211_ptr;
3301         struct cfg80211_beacon_data params;
3302         int err;
3303
3304         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3305             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3306                 return -EOPNOTSUPP;
3307
3308         if (!rdev->ops->change_beacon)
3309                 return -EOPNOTSUPP;
3310
3311         if (!wdev->beacon_interval)
3312                 return -EINVAL;
3313
3314         err = nl80211_parse_beacon(info->attrs, &params);
3315         if (err)
3316                 return err;
3317
3318         wdev_lock(wdev);
3319         err = rdev_change_beacon(rdev, dev, &params);
3320         wdev_unlock(wdev);
3321
3322         return err;
3323 }
3324
3325 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3326 {
3327         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3328         struct net_device *dev = info->user_ptr[1];
3329
3330         return cfg80211_stop_ap(rdev, dev);
3331 }
3332
3333 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3334         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3335         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3336         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3337         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3338         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3339         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3340 };
3341
3342 static int parse_station_flags(struct genl_info *info,
3343                                enum nl80211_iftype iftype,
3344                                struct station_parameters *params)
3345 {
3346         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3347         struct nlattr *nla;
3348         int flag;
3349
3350         /*
3351          * Try parsing the new attribute first so userspace
3352          * can specify both for older kernels.
3353          */
3354         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3355         if (nla) {
3356                 struct nl80211_sta_flag_update *sta_flags;
3357
3358                 sta_flags = nla_data(nla);
3359                 params->sta_flags_mask = sta_flags->mask;
3360                 params->sta_flags_set = sta_flags->set;
3361                 params->sta_flags_set &= params->sta_flags_mask;
3362                 if ((params->sta_flags_mask |
3363                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3364                         return -EINVAL;
3365                 return 0;
3366         }
3367
3368         /* if present, parse the old attribute */
3369
3370         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3371         if (!nla)
3372                 return 0;
3373
3374         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3375                              nla, sta_flags_policy))
3376                 return -EINVAL;
3377
3378         /*
3379          * Only allow certain flags for interface types so that
3380          * other attributes are silently ignored. Remember that
3381          * this is backward compatibility code with old userspace
3382          * and shouldn't be hit in other cases anyway.
3383          */
3384         switch (iftype) {
3385         case NL80211_IFTYPE_AP:
3386         case NL80211_IFTYPE_AP_VLAN:
3387         case NL80211_IFTYPE_P2P_GO:
3388                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3389                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3390                                          BIT(NL80211_STA_FLAG_WME) |
3391                                          BIT(NL80211_STA_FLAG_MFP);
3392                 break;
3393         case NL80211_IFTYPE_P2P_CLIENT:
3394         case NL80211_IFTYPE_STATION:
3395                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3396                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3397                 break;
3398         case NL80211_IFTYPE_MESH_POINT:
3399                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3400                                          BIT(NL80211_STA_FLAG_MFP) |
3401                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3402         default:
3403                 return -EINVAL;
3404         }
3405
3406         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3407                 if (flags[flag]) {
3408                         params->sta_flags_set |= (1<<flag);
3409
3410                         /* no longer support new API additions in old API */
3411                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3412                                 return -EINVAL;
3413                 }
3414         }
3415
3416         return 0;
3417 }
3418
3419 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3420                                  int attr)
3421 {
3422         struct nlattr *rate;
3423         u32 bitrate;
3424         u16 bitrate_compat;
3425
3426         rate = nla_nest_start(msg, attr);
3427         if (!rate)
3428                 return false;
3429
3430         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3431         bitrate = cfg80211_calculate_bitrate(info);
3432         /* report 16-bit bitrate only if we can */
3433         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3434         if (bitrate > 0 &&
3435             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3436                 return false;
3437         if (bitrate_compat > 0 &&
3438             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3439                 return false;
3440
3441         if (info->flags & RATE_INFO_FLAGS_MCS) {
3442                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3443                         return false;
3444                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3445                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3446                         return false;
3447                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3448                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3449                         return false;
3450         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3451                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3452                         return false;
3453                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3454                         return false;
3455                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3456                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3457                         return false;
3458                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3459                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3460                         return false;
3461                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3462                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3463                         return false;
3464                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3465                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3466                         return false;
3467                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3468                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3469                         return false;
3470         }
3471
3472         nla_nest_end(msg, rate);
3473         return true;
3474 }
3475
3476 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3477                                int id)
3478 {
3479         void *attr;
3480         int i = 0;
3481
3482         if (!mask)
3483                 return true;
3484
3485         attr = nla_nest_start(msg, id);
3486         if (!attr)
3487                 return false;
3488
3489         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3490                 if (!(mask & BIT(i)))
3491                         continue;
3492
3493                 if (nla_put_u8(msg, i, signal[i]))
3494                         return false;
3495         }
3496
3497         nla_nest_end(msg, attr);
3498
3499         return true;
3500 }
3501
3502 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3503                                 int flags,
3504                                 struct cfg80211_registered_device *rdev,
3505                                 struct net_device *dev,
3506                                 const u8 *mac_addr, struct station_info *sinfo)
3507 {
3508         void *hdr;
3509         struct nlattr *sinfoattr, *bss_param;
3510
3511         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3512         if (!hdr)
3513                 return -1;
3514
3515         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3516             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3517             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3518                 goto nla_put_failure;
3519
3520         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3521         if (!sinfoattr)
3522                 goto nla_put_failure;
3523         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3524             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3525                         sinfo->connected_time))
3526                 goto nla_put_failure;
3527         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3528             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3529                         sinfo->inactive_time))
3530                 goto nla_put_failure;
3531         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3532                               STATION_INFO_RX_BYTES64)) &&
3533             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3534                         (u32)sinfo->rx_bytes))
3535                 goto nla_put_failure;
3536         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3537                               STATION_INFO_TX_BYTES64)) &&
3538             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3539                         (u32)sinfo->tx_bytes))
3540                 goto nla_put_failure;
3541         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3542             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3543                         sinfo->rx_bytes))
3544                 goto nla_put_failure;
3545         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3546             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3547                         sinfo->tx_bytes))
3548                 goto nla_put_failure;
3549         if ((sinfo->filled & STATION_INFO_LLID) &&
3550             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3551                 goto nla_put_failure;
3552         if ((sinfo->filled & STATION_INFO_PLID) &&
3553             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3554                 goto nla_put_failure;
3555         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3556             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3557                        sinfo->plink_state))
3558                 goto nla_put_failure;
3559         switch (rdev->wiphy.signal_type) {
3560         case CFG80211_SIGNAL_TYPE_MBM:
3561                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3562                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3563                                sinfo->signal))
3564                         goto nla_put_failure;
3565                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3566                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3567                                sinfo->signal_avg))
3568                         goto nla_put_failure;
3569                 break;
3570         default:
3571                 break;
3572         }
3573         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3574                 if (!nl80211_put_signal(msg, sinfo->chains,
3575                                         sinfo->chain_signal,
3576                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3577                         goto nla_put_failure;
3578         }
3579         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3580                 if (!nl80211_put_signal(msg, sinfo->chains,
3581                                         sinfo->chain_signal_avg,
3582                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3583                         goto nla_put_failure;
3584         }
3585         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3586                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3587                                           NL80211_STA_INFO_TX_BITRATE))
3588                         goto nla_put_failure;
3589         }
3590         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3591                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3592                                           NL80211_STA_INFO_RX_BITRATE))
3593                         goto nla_put_failure;
3594         }
3595         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3596             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3597                         sinfo->rx_packets))
3598                 goto nla_put_failure;
3599         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3600             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3601                         sinfo->tx_packets))
3602                 goto nla_put_failure;
3603         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3604             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3605                         sinfo->tx_retries))
3606                 goto nla_put_failure;
3607         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3608             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3609                         sinfo->tx_failed))
3610                 goto nla_put_failure;
3611         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3612             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3613                         sinfo->beacon_loss_count))
3614                 goto nla_put_failure;
3615         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3616             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3617                         sinfo->local_pm))
3618                 goto nla_put_failure;
3619         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3620             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3621                         sinfo->peer_pm))
3622                 goto nla_put_failure;
3623         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3624             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3625                         sinfo->nonpeer_pm))
3626                 goto nla_put_failure;
3627         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3628                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3629                 if (!bss_param)
3630                         goto nla_put_failure;
3631
3632                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3633                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3634                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3635                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3636                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3637                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3638                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3639                                sinfo->bss_param.dtim_period) ||
3640                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3641                                 sinfo->bss_param.beacon_interval))
3642                         goto nla_put_failure;
3643
3644                 nla_nest_end(msg, bss_param);
3645         }
3646         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3647             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3648                     sizeof(struct nl80211_sta_flag_update),
3649                     &sinfo->sta_flags))
3650                 goto nla_put_failure;
3651         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3652                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3653                             sinfo->t_offset))
3654                 goto nla_put_failure;
3655         nla_nest_end(msg, sinfoattr);
3656
3657         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3658             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3659                     sinfo->assoc_req_ies))
3660                 goto nla_put_failure;
3661
3662         return genlmsg_end(msg, hdr);
3663
3664  nla_put_failure:
3665         genlmsg_cancel(msg, hdr);
3666         return -EMSGSIZE;
3667 }
3668
3669 static int nl80211_dump_station(struct sk_buff *skb,
3670                                 struct netlink_callback *cb)
3671 {
3672         struct station_info sinfo;
3673         struct cfg80211_registered_device *dev;
3674         struct wireless_dev *wdev;
3675         u8 mac_addr[ETH_ALEN];
3676         int sta_idx = cb->args[2];
3677         int err;
3678
3679         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3680         if (err)
3681                 return err;
3682
3683         if (!wdev->netdev) {
3684                 err = -EINVAL;
3685                 goto out_err;
3686         }
3687
3688         if (!dev->ops->dump_station) {
3689                 err = -EOPNOTSUPP;
3690                 goto out_err;
3691         }
3692
3693         while (1) {
3694                 memset(&sinfo, 0, sizeof(sinfo));
3695                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3696                                         mac_addr, &sinfo);
3697                 if (err == -ENOENT)
3698                         break;
3699                 if (err)
3700                         goto out_err;
3701
3702                 if (nl80211_send_station(skb,
3703                                 NETLINK_CB(cb->skb).portid,
3704                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3705                                 dev, wdev->netdev, mac_addr,
3706                                 &sinfo) < 0)
3707                         goto out;
3708
3709                 sta_idx++;
3710         }
3711
3712
3713  out:
3714         cb->args[2] = sta_idx;
3715         err = skb->len;
3716  out_err:
3717         nl80211_finish_wdev_dump(dev);
3718
3719         return err;
3720 }
3721
3722 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3723 {
3724         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3725         struct net_device *dev = info->user_ptr[1];
3726         struct station_info sinfo;
3727         struct sk_buff *msg;
3728         u8 *mac_addr = NULL;
3729         int err;
3730
3731         memset(&sinfo, 0, sizeof(sinfo));
3732
3733         if (!info->attrs[NL80211_ATTR_MAC])
3734                 return -EINVAL;
3735
3736         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3737
3738         if (!rdev->ops->get_station)
3739                 return -EOPNOTSUPP;
3740
3741         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3742         if (err)
3743                 return err;
3744
3745         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3746         if (!msg)
3747                 return -ENOMEM;
3748
3749         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3750                                  rdev, dev, mac_addr, &sinfo) < 0) {
3751                 nlmsg_free(msg);
3752                 return -ENOBUFS;
3753         }
3754
3755         return genlmsg_reply(msg, info);
3756 }
3757
3758 int cfg80211_check_station_change(struct wiphy *wiphy,
3759                                   struct station_parameters *params,
3760                                   enum cfg80211_station_type statype)
3761 {
3762         if (params->listen_interval != -1)
3763                 return -EINVAL;
3764         if (params->aid)
3765                 return -EINVAL;
3766
3767         /* When you run into this, adjust the code below for the new flag */
3768         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3769
3770         switch (statype) {
3771         case CFG80211_STA_MESH_PEER_KERNEL:
3772         case CFG80211_STA_MESH_PEER_USER:
3773                 /*
3774                  * No ignoring the TDLS flag here -- the userspace mesh
3775                  * code doesn't have the bug of including TDLS in the
3776                  * mask everywhere.
3777                  */
3778                 if (params->sta_flags_mask &
3779                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3780                                   BIT(NL80211_STA_FLAG_MFP) |
3781                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3782                         return -EINVAL;
3783                 break;
3784         case CFG80211_STA_TDLS_PEER_SETUP:
3785         case CFG80211_STA_TDLS_PEER_ACTIVE:
3786                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3787                         return -EINVAL;
3788                 /* ignore since it can't change */
3789                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3790                 break;
3791         default:
3792                 /* disallow mesh-specific things */
3793                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3794                         return -EINVAL;
3795                 if (params->local_pm)
3796                         return -EINVAL;
3797                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3798                         return -EINVAL;
3799         }
3800
3801         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3802             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3803                 /* TDLS can't be set, ... */
3804                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3805                         return -EINVAL;
3806                 /*
3807                  * ... but don't bother the driver with it. This works around
3808                  * a hostapd/wpa_supplicant issue -- it always includes the
3809                  * TLDS_PEER flag in the mask even for AP mode.
3810                  */
3811                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3812         }
3813
3814         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3815                 /* reject other things that can't change */
3816                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3817                         return -EINVAL;
3818                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3819                         return -EINVAL;
3820                 if (params->supported_rates)
3821                         return -EINVAL;
3822                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3823                         return -EINVAL;
3824         }
3825
3826         if (statype != CFG80211_STA_AP_CLIENT) {
3827                 if (params->vlan)
3828                         return -EINVAL;
3829         }
3830
3831         switch (statype) {
3832         case CFG80211_STA_AP_MLME_CLIENT:
3833                 /* Use this only for authorizing/unauthorizing a station */
3834                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3835                         return -EOPNOTSUPP;
3836                 break;
3837         case CFG80211_STA_AP_CLIENT:
3838                 /* accept only the listed bits */
3839                 if (params->sta_flags_mask &
3840                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3841                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3842                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3843                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3844                                   BIT(NL80211_STA_FLAG_WME) |
3845                                   BIT(NL80211_STA_FLAG_MFP)))
3846                         return -EINVAL;
3847
3848                 /* but authenticated/associated only if driver handles it */
3849                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3850                     params->sta_flags_mask &
3851                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3852                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3853                         return -EINVAL;
3854                 break;
3855         case CFG80211_STA_IBSS:
3856         case CFG80211_STA_AP_STA:
3857                 /* reject any changes other than AUTHORIZED */
3858                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3859                         return -EINVAL;
3860                 break;
3861         case CFG80211_STA_TDLS_PEER_SETUP:
3862                 /* reject any changes other than AUTHORIZED or WME */
3863                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3864                                                BIT(NL80211_STA_FLAG_WME)))
3865                         return -EINVAL;
3866                 /* force (at least) rates when authorizing */
3867                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3868                     !params->supported_rates)
3869                         return -EINVAL;
3870                 break;
3871         case CFG80211_STA_TDLS_PEER_ACTIVE:
3872                 /* reject any changes */
3873                 return -EINVAL;
3874         case CFG80211_STA_MESH_PEER_KERNEL:
3875                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3876                         return -EINVAL;
3877                 break;
3878         case CFG80211_STA_MESH_PEER_USER:
3879                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3880                         return -EINVAL;
3881                 break;
3882         }
3883
3884         return 0;
3885 }
3886 EXPORT_SYMBOL(cfg80211_check_station_change);
3887
3888 /*
3889  * Get vlan interface making sure it is running and on the right wiphy.
3890  */
3891 static struct net_device *get_vlan(struct genl_info *info,
3892                                    struct cfg80211_registered_device *rdev)
3893 {
3894         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3895         struct net_device *v;
3896         int ret;
3897
3898         if (!vlanattr)
3899                 return NULL;
3900
3901         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3902         if (!v)
3903                 return ERR_PTR(-ENODEV);
3904
3905         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3906                 ret = -EINVAL;
3907                 goto error;
3908         }
3909
3910         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3911             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3912             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3913                 ret = -EINVAL;
3914                 goto error;
3915         }
3916
3917         if (!netif_running(v)) {
3918                 ret = -ENETDOWN;
3919                 goto error;
3920         }
3921
3922         return v;
3923  error:
3924         dev_put(v);
3925         return ERR_PTR(ret);
3926 }
3927
3928 static const struct nla_policy
3929 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
3930         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3931         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3932 };
3933
3934 static int nl80211_parse_sta_wme(struct genl_info *info,
3935                                  struct station_parameters *params)
3936 {
3937         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3938         struct nlattr *nla;
3939         int err;
3940
3941         /* parse WME attributes if present */
3942         if (!info->attrs[NL80211_ATTR_STA_WME])
3943                 return 0;
3944
3945         nla = info->attrs[NL80211_ATTR_STA_WME];
3946         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3947                                nl80211_sta_wme_policy);
3948         if (err)
3949                 return err;
3950
3951         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3952                 params->uapsd_queues = nla_get_u8(
3953                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3954         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3955                 return -EINVAL;
3956
3957         if (tb[NL80211_STA_WME_MAX_SP])
3958                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3959
3960         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3961                 return -EINVAL;
3962
3963         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3964
3965         return 0;
3966 }
3967
3968 static int nl80211_parse_sta_channel_info(struct genl_info *info,
3969                                       struct station_parameters *params)
3970 {
3971         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
3972                 params->supported_channels =
3973                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3974                 params->supported_channels_len =
3975                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3976                 /*
3977                  * Need to include at least one (first channel, number of
3978                  * channels) tuple for each subband, and must have proper
3979                  * tuples for the rest of the data as well.
3980                  */
3981                 if (params->supported_channels_len < 2)
3982                         return -EINVAL;
3983                 if (params->supported_channels_len % 2)
3984                         return -EINVAL;
3985         }
3986
3987         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
3988                 params->supported_oper_classes =
3989                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3990                 params->supported_oper_classes_len =
3991                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3992                 /*
3993                  * The value of the Length field of the Supported Operating
3994                  * Classes element is between 2 and 253.
3995                  */
3996                 if (params->supported_oper_classes_len < 2 ||
3997                     params->supported_oper_classes_len > 253)
3998                         return -EINVAL;
3999         }
4000         return 0;
4001 }
4002
4003 static int nl80211_set_station_tdls(struct genl_info *info,
4004                                     struct station_parameters *params)
4005 {
4006         int err;
4007         /* Dummy STA entry gets updated once the peer capabilities are known */
4008         if (info->attrs[NL80211_ATTR_PEER_AID])
4009                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4010         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4011                 params->ht_capa =
4012                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4013         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4014                 params->vht_capa =
4015                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4016
4017         err = nl80211_parse_sta_channel_info(info, params);
4018         if (err)
4019                 return err;
4020
4021         return nl80211_parse_sta_wme(info, params);
4022 }
4023
4024 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4025 {
4026         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4027         struct net_device *dev = info->user_ptr[1];
4028         struct station_parameters params;
4029         u8 *mac_addr;
4030         int err;
4031
4032         memset(&params, 0, sizeof(params));
4033
4034         params.listen_interval = -1;
4035
4036         if (!rdev->ops->change_station)
4037                 return -EOPNOTSUPP;
4038
4039         if (info->attrs[NL80211_ATTR_STA_AID])
4040                 return -EINVAL;
4041
4042         if (!info->attrs[NL80211_ATTR_MAC])
4043                 return -EINVAL;
4044
4045         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4046
4047         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4048                 params.supported_rates =
4049                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4050                 params.supported_rates_len =
4051                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4052         }
4053
4054         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4055                 params.capability =
4056                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4057                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4058         }
4059
4060         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4061                 params.ext_capab =
4062                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4063                 params.ext_capab_len =
4064                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4065         }
4066
4067         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4068                 return -EINVAL;
4069
4070         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4071                 return -EINVAL;
4072
4073         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4074                 params.plink_action =
4075                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4076                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4077                         return -EINVAL;
4078         }
4079
4080         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4081                 params.plink_state =
4082                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4083                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4084                         return -EINVAL;
4085                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4086         }
4087
4088         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4089                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4090                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4091
4092                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4093                     pm > NL80211_MESH_POWER_MAX)
4094                         return -EINVAL;
4095
4096                 params.local_pm = pm;
4097         }
4098
4099         /* Include parameters for TDLS peer (will check later) */
4100         err = nl80211_set_station_tdls(info, &params);
4101         if (err)
4102                 return err;
4103
4104         params.vlan = get_vlan(info, rdev);
4105         if (IS_ERR(params.vlan))
4106                 return PTR_ERR(params.vlan);
4107
4108         switch (dev->ieee80211_ptr->iftype) {
4109         case NL80211_IFTYPE_AP:
4110         case NL80211_IFTYPE_AP_VLAN:
4111         case NL80211_IFTYPE_P2P_GO:
4112         case NL80211_IFTYPE_P2P_CLIENT:
4113         case NL80211_IFTYPE_STATION:
4114         case NL80211_IFTYPE_ADHOC:
4115         case NL80211_IFTYPE_MESH_POINT:
4116                 break;
4117         default:
4118                 err = -EOPNOTSUPP;
4119                 goto out_put_vlan;
4120         }
4121
4122         /* driver will call cfg80211_check_station_change() */
4123         err = rdev_change_station(rdev, dev, mac_addr, &params);
4124
4125  out_put_vlan:
4126         if (params.vlan)
4127                 dev_put(params.vlan);
4128
4129         return err;
4130 }
4131
4132 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4133 {
4134         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4135         int err;
4136         struct net_device *dev = info->user_ptr[1];
4137         struct station_parameters params;
4138         u8 *mac_addr = NULL;
4139
4140         memset(&params, 0, sizeof(params));
4141
4142         if (!rdev->ops->add_station)
4143                 return -EOPNOTSUPP;
4144
4145         if (!info->attrs[NL80211_ATTR_MAC])
4146                 return -EINVAL;
4147
4148         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4149                 return -EINVAL;
4150
4151         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4152                 return -EINVAL;
4153
4154         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4155             !info->attrs[NL80211_ATTR_PEER_AID])
4156                 return -EINVAL;
4157
4158         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4159         params.supported_rates =
4160                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4161         params.supported_rates_len =
4162                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4163         params.listen_interval =
4164                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4165
4166         if (info->attrs[NL80211_ATTR_PEER_AID])
4167                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4168         else
4169                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4170         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4171                 return -EINVAL;
4172
4173         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4174                 params.capability =
4175                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4176                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4177         }
4178
4179         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4180                 params.ext_capab =
4181                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4182                 params.ext_capab_len =
4183                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4184         }
4185
4186         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4187                 params.ht_capa =
4188                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4189
4190         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4191                 params.vht_capa =
4192                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4193
4194         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4195                 params.opmode_notif_used = true;
4196                 params.opmode_notif =
4197                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4198         }
4199
4200         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4201                 params.plink_action =
4202                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4203                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4204                         return -EINVAL;
4205         }
4206
4207         err = nl80211_parse_sta_channel_info(info, &params);
4208         if (err)
4209                 return err;
4210
4211         err = nl80211_parse_sta_wme(info, &params);
4212         if (err)
4213                 return err;
4214
4215         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4216                 return -EINVAL;
4217
4218         /* When you run into this, adjust the code below for the new flag */
4219         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4220
4221         switch (dev->ieee80211_ptr->iftype) {
4222         case NL80211_IFTYPE_AP:
4223         case NL80211_IFTYPE_AP_VLAN:
4224         case NL80211_IFTYPE_P2P_GO:
4225                 /* ignore WME attributes if iface/sta is not capable */
4226                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4227                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4228                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4229
4230                 /* TDLS peers cannot be added */
4231                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4232                     info->attrs[NL80211_ATTR_PEER_AID])
4233                         return -EINVAL;
4234                 /* but don't bother the driver with it */
4235                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4236
4237                 /* allow authenticated/associated only if driver handles it */
4238                 if (!(rdev->wiphy.features &
4239                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4240                     params.sta_flags_mask &
4241                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4242                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4243                         return -EINVAL;
4244
4245                 /* must be last in here for error handling */
4246                 params.vlan = get_vlan(info, rdev);
4247                 if (IS_ERR(params.vlan))
4248                         return PTR_ERR(params.vlan);
4249                 break;
4250         case NL80211_IFTYPE_MESH_POINT:
4251                 /* ignore uAPSD data */
4252                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4253
4254                 /* associated is disallowed */
4255                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4256                         return -EINVAL;
4257                 /* TDLS peers cannot be added */
4258                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4259                     info->attrs[NL80211_ATTR_PEER_AID])
4260                         return -EINVAL;
4261                 break;
4262         case NL80211_IFTYPE_STATION:
4263         case NL80211_IFTYPE_P2P_CLIENT:
4264                 /* ignore uAPSD data */
4265                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4266
4267                 /* these are disallowed */
4268                 if (params.sta_flags_mask &
4269                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4270                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4271                         return -EINVAL;
4272                 /* Only TDLS peers can be added */
4273                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4274                         return -EINVAL;
4275                 /* Can only add if TDLS ... */
4276                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4277                         return -EOPNOTSUPP;
4278                 /* ... with external setup is supported */
4279                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4280                         return -EOPNOTSUPP;
4281                 /*
4282                  * Older wpa_supplicant versions always mark the TDLS peer
4283                  * as authorized, but it shouldn't yet be.
4284                  */
4285                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4286                 break;
4287         default:
4288                 return -EOPNOTSUPP;
4289         }
4290
4291         /* be aware of params.vlan when changing code here */
4292
4293         err = rdev_add_station(rdev, dev, mac_addr, &params);
4294
4295         if (params.vlan)
4296                 dev_put(params.vlan);
4297         return err;
4298 }
4299
4300 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4301 {
4302         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4303         struct net_device *dev = info->user_ptr[1];
4304         u8 *mac_addr = NULL;
4305
4306         if (info->attrs[NL80211_ATTR_MAC])
4307                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4308
4309         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4310             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4311             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4312             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4313                 return -EINVAL;
4314
4315         if (!rdev->ops->del_station)
4316                 return -EOPNOTSUPP;
4317
4318         return rdev_del_station(rdev, dev, mac_addr);
4319 }
4320
4321 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4322                                 int flags, struct net_device *dev,
4323                                 u8 *dst, u8 *next_hop,
4324                                 struct mpath_info *pinfo)
4325 {
4326         void *hdr;
4327         struct nlattr *pinfoattr;
4328
4329         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4330         if (!hdr)
4331                 return -1;
4332
4333         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4334             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4335             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4336             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4337                 goto nla_put_failure;
4338
4339         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4340         if (!pinfoattr)
4341                 goto nla_put_failure;
4342         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4343             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4344                         pinfo->frame_qlen))
4345                 goto nla_put_failure;
4346         if (((pinfo->filled & MPATH_INFO_SN) &&
4347              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4348             ((pinfo->filled & MPATH_INFO_METRIC) &&
4349              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4350                          pinfo->metric)) ||
4351             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4352              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4353                          pinfo->exptime)) ||
4354             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4355              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4356                         pinfo->flags)) ||
4357             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4358              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4359                          pinfo->discovery_timeout)) ||
4360             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4361              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4362                         pinfo->discovery_retries)))
4363                 goto nla_put_failure;
4364
4365         nla_nest_end(msg, pinfoattr);
4366
4367         return genlmsg_end(msg, hdr);
4368
4369  nla_put_failure:
4370         genlmsg_cancel(msg, hdr);
4371         return -EMSGSIZE;
4372 }
4373
4374 static int nl80211_dump_mpath(struct sk_buff *skb,
4375                               struct netlink_callback *cb)
4376 {
4377         struct mpath_info pinfo;
4378         struct cfg80211_registered_device *dev;
4379         struct wireless_dev *wdev;
4380         u8 dst[ETH_ALEN];
4381         u8 next_hop[ETH_ALEN];
4382         int path_idx = cb->args[2];
4383         int err;
4384
4385         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4386         if (err)
4387                 return err;
4388
4389         if (!dev->ops->dump_mpath) {
4390                 err = -EOPNOTSUPP;
4391                 goto out_err;
4392         }
4393
4394         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4395                 err = -EOPNOTSUPP;
4396                 goto out_err;
4397         }
4398
4399         while (1) {
4400                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4401                                       next_hop, &pinfo);
4402                 if (err == -ENOENT)
4403                         break;
4404                 if (err)
4405                         goto out_err;
4406
4407                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4408                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4409                                        wdev->netdev, dst, next_hop,
4410                                        &pinfo) < 0)
4411                         goto out;
4412
4413                 path_idx++;
4414         }
4415
4416
4417  out:
4418         cb->args[2] = path_idx;
4419         err = skb->len;
4420  out_err:
4421         nl80211_finish_wdev_dump(dev);
4422         return err;
4423 }
4424
4425 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4426 {
4427         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4428         int err;
4429         struct net_device *dev = info->user_ptr[1];
4430         struct mpath_info pinfo;
4431         struct sk_buff *msg;
4432         u8 *dst = NULL;
4433         u8 next_hop[ETH_ALEN];
4434
4435         memset(&pinfo, 0, sizeof(pinfo));
4436
4437         if (!info->attrs[NL80211_ATTR_MAC])
4438                 return -EINVAL;
4439
4440         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4441
4442         if (!rdev->ops->get_mpath)
4443                 return -EOPNOTSUPP;
4444
4445         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4446                 return -EOPNOTSUPP;
4447
4448         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4449         if (err)
4450                 return err;
4451
4452         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4453         if (!msg)
4454                 return -ENOMEM;
4455
4456         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4457                                  dev, dst, next_hop, &pinfo) < 0) {
4458                 nlmsg_free(msg);
4459                 return -ENOBUFS;
4460         }
4461
4462         return genlmsg_reply(msg, info);
4463 }
4464
4465 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4466 {
4467         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4468         struct net_device *dev = info->user_ptr[1];
4469         u8 *dst = NULL;
4470         u8 *next_hop = NULL;
4471
4472         if (!info->attrs[NL80211_ATTR_MAC])
4473                 return -EINVAL;
4474
4475         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4476                 return -EINVAL;
4477
4478         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4479         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4480
4481         if (!rdev->ops->change_mpath)
4482                 return -EOPNOTSUPP;
4483
4484         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4485                 return -EOPNOTSUPP;
4486
4487         return rdev_change_mpath(rdev, dev, dst, next_hop);
4488 }
4489
4490 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4491 {
4492         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4493         struct net_device *dev = info->user_ptr[1];
4494         u8 *dst = NULL;
4495         u8 *next_hop = NULL;
4496
4497         if (!info->attrs[NL80211_ATTR_MAC])
4498                 return -EINVAL;
4499
4500         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4501                 return -EINVAL;
4502
4503         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4504         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4505
4506         if (!rdev->ops->add_mpath)
4507                 return -EOPNOTSUPP;
4508
4509         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4510                 return -EOPNOTSUPP;
4511
4512         return rdev_add_mpath(rdev, dev, dst, next_hop);
4513 }
4514
4515 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4516 {
4517         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4518         struct net_device *dev = info->user_ptr[1];
4519         u8 *dst = NULL;
4520
4521         if (info->attrs[NL80211_ATTR_MAC])
4522                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4523
4524         if (!rdev->ops->del_mpath)
4525                 return -EOPNOTSUPP;
4526
4527         return rdev_del_mpath(rdev, dev, dst);
4528 }
4529
4530 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4531 {
4532         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4533         struct net_device *dev = info->user_ptr[1];
4534         struct wireless_dev *wdev = dev->ieee80211_ptr;
4535         struct bss_parameters params;
4536         int err;
4537
4538         memset(&params, 0, sizeof(params));
4539         /* default to not changing parameters */
4540         params.use_cts_prot = -1;
4541         params.use_short_preamble = -1;
4542         params.use_short_slot_time = -1;
4543         params.ap_isolate = -1;
4544         params.ht_opmode = -1;
4545         params.p2p_ctwindow = -1;
4546         params.p2p_opp_ps = -1;
4547
4548         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4549                 params.use_cts_prot =
4550                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4551         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4552                 params.use_short_preamble =
4553                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4554         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4555                 params.use_short_slot_time =
4556                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4557         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4558                 params.basic_rates =
4559                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4560                 params.basic_rates_len =
4561                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4562         }
4563         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4564                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4565         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4566                 params.ht_opmode =
4567                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4568
4569         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4570                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4571                         return -EINVAL;
4572                 params.p2p_ctwindow =
4573                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4574                 if (params.p2p_ctwindow < 0)
4575                         return -EINVAL;
4576                 if (params.p2p_ctwindow != 0 &&
4577                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4578                         return -EINVAL;
4579         }
4580
4581         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4582                 u8 tmp;
4583
4584                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4585                         return -EINVAL;
4586                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4587                 if (tmp > 1)
4588                         return -EINVAL;
4589                 params.p2p_opp_ps = tmp;
4590                 if (params.p2p_opp_ps &&
4591                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4592                         return -EINVAL;
4593         }
4594
4595         if (!rdev->ops->change_bss)
4596                 return -EOPNOTSUPP;
4597
4598         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4599             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4600                 return -EOPNOTSUPP;
4601
4602         wdev_lock(wdev);
4603         err = rdev_change_bss(rdev, dev, &params);
4604         wdev_unlock(wdev);
4605
4606         return err;
4607 }
4608
4609 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4610         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4611         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4612         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4613         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4614         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4615         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4616 };
4617
4618 static int parse_reg_rule(struct nlattr *tb[],
4619         struct ieee80211_reg_rule *reg_rule)
4620 {
4621         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4622         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4623
4624         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4625                 return -EINVAL;
4626         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4627                 return -EINVAL;
4628         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4629                 return -EINVAL;
4630         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4631                 return -EINVAL;
4632
4633         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4634
4635         freq_range->start_freq_khz =
4636                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4637         freq_range->end_freq_khz =
4638                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4639         if (tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4640                 freq_range->max_bandwidth_khz =
4641                         nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4642
4643         power_rule->max_eirp =
4644                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4645
4646         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4647                 power_rule->max_antenna_gain =
4648                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4649
4650         return 0;
4651 }
4652
4653 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4654 {
4655         int r;
4656         char *data = NULL;
4657         enum nl80211_user_reg_hint_type user_reg_hint_type;
4658
4659         /*
4660          * You should only get this when cfg80211 hasn't yet initialized
4661          * completely when built-in to the kernel right between the time
4662          * window between nl80211_init() and regulatory_init(), if that is
4663          * even possible.
4664          */
4665         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4666                 return -EINPROGRESS;
4667
4668         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4669                 return -EINVAL;
4670
4671         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4672
4673         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4674                 user_reg_hint_type =
4675                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4676         else
4677                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4678
4679         switch (user_reg_hint_type) {
4680         case NL80211_USER_REG_HINT_USER:
4681         case NL80211_USER_REG_HINT_CELL_BASE:
4682                 break;
4683         default:
4684                 return -EINVAL;
4685         }
4686
4687         r = regulatory_hint_user(data, user_reg_hint_type);
4688
4689         return r;
4690 }
4691
4692 static int nl80211_get_mesh_config(struct sk_buff *skb,
4693                                    struct genl_info *info)
4694 {
4695         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4696         struct net_device *dev = info->user_ptr[1];
4697         struct wireless_dev *wdev = dev->ieee80211_ptr;
4698         struct mesh_config cur_params;
4699         int err = 0;
4700         void *hdr;
4701         struct nlattr *pinfoattr;
4702         struct sk_buff *msg;
4703
4704         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4705                 return -EOPNOTSUPP;
4706
4707         if (!rdev->ops->get_mesh_config)
4708                 return -EOPNOTSUPP;
4709
4710         wdev_lock(wdev);
4711         /* If not connected, get default parameters */
4712         if (!wdev->mesh_id_len)
4713                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4714         else
4715                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4716         wdev_unlock(wdev);
4717
4718         if (err)
4719                 return err;
4720
4721         /* Draw up a netlink message to send back */
4722         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4723         if (!msg)
4724                 return -ENOMEM;
4725         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4726                              NL80211_CMD_GET_MESH_CONFIG);
4727         if (!hdr)
4728                 goto out;
4729         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4730         if (!pinfoattr)
4731                 goto nla_put_failure;
4732         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4733             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4734                         cur_params.dot11MeshRetryTimeout) ||
4735             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4736                         cur_params.dot11MeshConfirmTimeout) ||
4737             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4738                         cur_params.dot11MeshHoldingTimeout) ||
4739             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4740                         cur_params.dot11MeshMaxPeerLinks) ||
4741             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4742                        cur_params.dot11MeshMaxRetries) ||
4743             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4744                        cur_params.dot11MeshTTL) ||
4745             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4746                        cur_params.element_ttl) ||
4747             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4748                        cur_params.auto_open_plinks) ||
4749             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4750                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4751             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4752                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4753             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4754                         cur_params.path_refresh_time) ||
4755             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4756                         cur_params.min_discovery_timeout) ||
4757             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4758                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4759             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4760                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4761             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4762                         cur_params.dot11MeshHWMPperrMinInterval) ||
4763             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4764                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4765             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4766                        cur_params.dot11MeshHWMPRootMode) ||
4767             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4768                         cur_params.dot11MeshHWMPRannInterval) ||
4769             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4770                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4771             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4772                        cur_params.dot11MeshForwarding) ||
4773             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4774                         cur_params.rssi_threshold) ||
4775             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4776                         cur_params.ht_opmode) ||
4777             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4778                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4779             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4780                         cur_params.dot11MeshHWMProotInterval) ||
4781             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4782                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4783             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4784                         cur_params.power_mode) ||
4785             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4786                         cur_params.dot11MeshAwakeWindowDuration) ||
4787             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4788                         cur_params.plink_timeout))
4789                 goto nla_put_failure;
4790         nla_nest_end(msg, pinfoattr);
4791         genlmsg_end(msg, hdr);
4792         return genlmsg_reply(msg, info);
4793
4794  nla_put_failure:
4795         genlmsg_cancel(msg, hdr);
4796  out:
4797         nlmsg_free(msg);
4798         return -ENOBUFS;
4799 }
4800
4801 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4802         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4803         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4804         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4805         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4806         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4807         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4808         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4809         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4810         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4811         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4812         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4813         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4814         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4815         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4816         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4817         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4818         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4819         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4820         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4821         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4822         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4823         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4824         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4825         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4826         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4827         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4828         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4829         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4830 };
4831
4832 static const struct nla_policy
4833         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4834         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4835         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4836         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4837         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4838         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4839         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4840         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4841                                     .len = IEEE80211_MAX_DATA_LEN },
4842         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4843 };
4844
4845 static int nl80211_parse_mesh_config(struct genl_info *info,
4846                                      struct mesh_config *cfg,
4847                                      u32 *mask_out)
4848 {
4849         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4850         u32 mask = 0;
4851
4852 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4853 do {                                                                        \
4854         if (tb[attr]) {                                                     \
4855                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4856                         return -EINVAL;                                     \
4857                 cfg->param = fn(tb[attr]);                                  \
4858                 mask |= (1 << (attr - 1));                                  \
4859         }                                                                   \
4860 } while (0)
4861
4862
4863         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4864                 return -EINVAL;
4865         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4866                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4867                              nl80211_meshconf_params_policy))
4868                 return -EINVAL;
4869
4870         /* This makes sure that there aren't more than 32 mesh config
4871          * parameters (otherwise our bitfield scheme would not work.) */
4872         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4873
4874         /* Fill in the params struct */
4875         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4876                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4877                                   nla_get_u16);
4878         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4879                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4880                                   nla_get_u16);
4881         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4882                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4883                                   nla_get_u16);
4884         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4885                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4886                                   nla_get_u16);
4887         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4888                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4889                                   nla_get_u8);
4890         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4891                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4892         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4893                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4894                                   nla_get_u8);
4895         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4896                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4897                                   nla_get_u8);
4898         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4899                                   1, 255, mask,
4900                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4901                                   nla_get_u32);
4902         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4903                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4904                                   nla_get_u8);
4905         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4906                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4907                                   nla_get_u32);
4908         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4909                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4910                                   nla_get_u16);
4911         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4912                                   1, 65535, mask,
4913                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4914                                   nla_get_u32);
4915         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4916                                   1, 65535, mask,
4917                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4918                                   nla_get_u16);
4919         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4920                                   1, 65535, mask,
4921                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4922                                   nla_get_u16);
4923         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4924                                   dot11MeshHWMPnetDiameterTraversalTime,
4925                                   1, 65535, mask,
4926                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4927                                   nla_get_u16);
4928         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4929                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4930                                   nla_get_u8);
4931         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4932                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4933                                   nla_get_u16);
4934         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4935                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4936                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4937                                   nla_get_u8);
4938         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4939                                   mask, NL80211_MESHCONF_FORWARDING,
4940                                   nla_get_u8);
4941         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4942                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4943                                   nla_get_s32);
4944         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4945                                   mask, NL80211_MESHCONF_HT_OPMODE,
4946                                   nla_get_u16);
4947         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4948                                   1, 65535, mask,
4949                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4950                                   nla_get_u32);
4951         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4952                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4953                                   nla_get_u16);
4954         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4955                                   dot11MeshHWMPconfirmationInterval,
4956                                   1, 65535, mask,
4957                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4958                                   nla_get_u16);
4959         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4960                                   NL80211_MESH_POWER_ACTIVE,
4961                                   NL80211_MESH_POWER_MAX,
4962                                   mask, NL80211_MESHCONF_POWER_MODE,
4963                                   nla_get_u32);
4964         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4965                                   0, 65535, mask,
4966                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4967         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4968                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4969                                   nla_get_u32);
4970         if (mask_out)
4971                 *mask_out = mask;
4972
4973         return 0;
4974
4975 #undef FILL_IN_MESH_PARAM_IF_SET
4976 }
4977
4978 static int nl80211_parse_mesh_setup(struct genl_info *info,
4979                                      struct mesh_setup *setup)
4980 {
4981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4982         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4983
4984         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4985                 return -EINVAL;
4986         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4987                              info->attrs[NL80211_ATTR_MESH_SETUP],
4988                              nl80211_mesh_setup_params_policy))
4989                 return -EINVAL;
4990
4991         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4992                 setup->sync_method =
4993                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4994                  IEEE80211_SYNC_METHOD_VENDOR :
4995                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4996
4997         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4998                 setup->path_sel_proto =
4999                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5000                  IEEE80211_PATH_PROTOCOL_VENDOR :
5001                  IEEE80211_PATH_PROTOCOL_HWMP;
5002
5003         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5004                 setup->path_metric =
5005                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5006                  IEEE80211_PATH_METRIC_VENDOR :
5007                  IEEE80211_PATH_METRIC_AIRTIME;
5008
5009
5010         if (tb[NL80211_MESH_SETUP_IE]) {
5011                 struct nlattr *ieattr =
5012                         tb[NL80211_MESH_SETUP_IE];
5013                 if (!is_valid_ie_attr(ieattr))
5014                         return -EINVAL;
5015                 setup->ie = nla_data(ieattr);
5016                 setup->ie_len = nla_len(ieattr);
5017         }
5018         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5019             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5020                 return -EINVAL;
5021         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5022         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5023         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5024         if (setup->is_secure)
5025                 setup->user_mpm = true;
5026
5027         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5028                 if (!setup->user_mpm)
5029                         return -EINVAL;
5030                 setup->auth_id =
5031                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5032         }
5033
5034         return 0;
5035 }
5036
5037 static int nl80211_update_mesh_config(struct sk_buff *skb,
5038                                       struct genl_info *info)
5039 {
5040         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5041         struct net_device *dev = info->user_ptr[1];
5042         struct wireless_dev *wdev = dev->ieee80211_ptr;
5043         struct mesh_config cfg;
5044         u32 mask;
5045         int err;
5046
5047         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5048                 return -EOPNOTSUPP;
5049
5050         if (!rdev->ops->update_mesh_config)
5051                 return -EOPNOTSUPP;
5052
5053         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5054         if (err)
5055                 return err;
5056
5057         wdev_lock(wdev);
5058         if (!wdev->mesh_id_len)
5059                 err = -ENOLINK;
5060
5061         if (!err)
5062                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5063
5064         wdev_unlock(wdev);
5065
5066         return err;
5067 }
5068
5069 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5070 {
5071         const struct ieee80211_regdomain *regdom;
5072         struct sk_buff *msg;
5073         void *hdr = NULL;
5074         struct nlattr *nl_reg_rules;
5075         unsigned int i;
5076
5077         if (!cfg80211_regdomain)
5078                 return -EINVAL;
5079
5080         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5081         if (!msg)
5082                 return -ENOBUFS;
5083
5084         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5085                              NL80211_CMD_GET_REG);
5086         if (!hdr)
5087                 goto put_failure;
5088
5089         if (reg_last_request_cell_base() &&
5090             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5091                         NL80211_USER_REG_HINT_CELL_BASE))
5092                 goto nla_put_failure;
5093
5094         rcu_read_lock();
5095         regdom = rcu_dereference(cfg80211_regdomain);
5096
5097         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5098             (regdom->dfs_region &&
5099              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5100                 goto nla_put_failure_rcu;
5101
5102         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5103         if (!nl_reg_rules)
5104                 goto nla_put_failure_rcu;
5105
5106         for (i = 0; i < regdom->n_reg_rules; i++) {
5107                 struct nlattr *nl_reg_rule;
5108                 const struct ieee80211_reg_rule *reg_rule;
5109                 const struct ieee80211_freq_range *freq_range;
5110                 const struct ieee80211_power_rule *power_rule;
5111                 unsigned int max_bandwidth_khz;
5112
5113                 reg_rule = &regdom->reg_rules[i];
5114                 freq_range = &reg_rule->freq_range;
5115                 power_rule = &reg_rule->power_rule;
5116
5117                 nl_reg_rule = nla_nest_start(msg, i);
5118                 if (!nl_reg_rule)
5119                         goto nla_put_failure_rcu;
5120
5121                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5122                 if (!max_bandwidth_khz)
5123                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5124                                                                   reg_rule);
5125
5126                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5127                                 reg_rule->flags) ||
5128                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5129                                 freq_range->start_freq_khz) ||
5130                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5131                                 freq_range->end_freq_khz) ||
5132                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5133                                 max_bandwidth_khz) ||
5134                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5135                                 power_rule->max_antenna_gain) ||
5136                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5137                                 power_rule->max_eirp))
5138                         goto nla_put_failure_rcu;
5139
5140                 nla_nest_end(msg, nl_reg_rule);
5141         }
5142         rcu_read_unlock();
5143
5144         nla_nest_end(msg, nl_reg_rules);
5145
5146         genlmsg_end(msg, hdr);
5147         return genlmsg_reply(msg, info);
5148
5149 nla_put_failure_rcu:
5150         rcu_read_unlock();
5151 nla_put_failure:
5152         genlmsg_cancel(msg, hdr);
5153 put_failure:
5154         nlmsg_free(msg);
5155         return -EMSGSIZE;
5156 }
5157
5158 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5159 {
5160         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5161         struct nlattr *nl_reg_rule;
5162         char *alpha2 = NULL;
5163         int rem_reg_rules = 0, r = 0;
5164         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5165         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5166         struct ieee80211_regdomain *rd = NULL;
5167
5168         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5169                 return -EINVAL;
5170
5171         if (!info->attrs[NL80211_ATTR_REG_RULES])
5172                 return -EINVAL;
5173
5174         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5175
5176         if (info->attrs[NL80211_ATTR_DFS_REGION])
5177                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5178
5179         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5180                             rem_reg_rules) {
5181                 num_rules++;
5182                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5183                         return -EINVAL;
5184         }
5185
5186         if (!reg_is_valid_request(alpha2))
5187                 return -EINVAL;
5188
5189         size_of_regd = sizeof(struct ieee80211_regdomain) +
5190                        num_rules * sizeof(struct ieee80211_reg_rule);
5191
5192         rd = kzalloc(size_of_regd, GFP_KERNEL);
5193         if (!rd)
5194                 return -ENOMEM;
5195
5196         rd->n_reg_rules = num_rules;
5197         rd->alpha2[0] = alpha2[0];
5198         rd->alpha2[1] = alpha2[1];
5199
5200         /*
5201          * Disable DFS master mode if the DFS region was
5202          * not supported or known on this kernel.
5203          */
5204         if (reg_supported_dfs_region(dfs_region))
5205                 rd->dfs_region = dfs_region;
5206
5207         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5208                             rem_reg_rules) {
5209                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5210                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5211                               reg_rule_policy);
5212                 if (r)
5213                         goto bad_reg;
5214                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5215                 if (r)
5216                         goto bad_reg;
5217
5218                 rule_idx++;
5219
5220                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5221                         r = -EINVAL;
5222                         goto bad_reg;
5223                 }
5224         }
5225
5226         r = set_regdom(rd);
5227         /* set_regdom took ownership */
5228         rd = NULL;
5229
5230  bad_reg:
5231         kfree(rd);
5232         return r;
5233 }
5234
5235 static int validate_scan_freqs(struct nlattr *freqs)
5236 {
5237         struct nlattr *attr1, *attr2;
5238         int n_channels = 0, tmp1, tmp2;
5239
5240         nla_for_each_nested(attr1, freqs, tmp1) {
5241                 n_channels++;
5242                 /*
5243                  * Some hardware has a limited channel list for
5244                  * scanning, and it is pretty much nonsensical
5245                  * to scan for a channel twice, so disallow that
5246                  * and don't require drivers to check that the
5247                  * channel list they get isn't longer than what
5248                  * they can scan, as long as they can scan all
5249                  * the channels they registered at once.
5250                  */
5251                 nla_for_each_nested(attr2, freqs, tmp2)
5252                         if (attr1 != attr2 &&
5253                             nla_get_u32(attr1) == nla_get_u32(attr2))
5254                                 return 0;
5255         }
5256
5257         return n_channels;
5258 }
5259
5260 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5261 {
5262         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5263         struct wireless_dev *wdev = info->user_ptr[1];
5264         struct cfg80211_scan_request *request;
5265         struct nlattr *attr;
5266         struct wiphy *wiphy;
5267         int err, tmp, n_ssids = 0, n_channels, i;
5268         size_t ie_len;
5269
5270         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5271                 return -EINVAL;
5272
5273         wiphy = &rdev->wiphy;
5274
5275         if (!rdev->ops->scan)
5276                 return -EOPNOTSUPP;
5277
5278         if (rdev->scan_req || rdev->scan_msg) {
5279                 err = -EBUSY;
5280                 goto unlock;
5281         }
5282
5283         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5284                 n_channels = validate_scan_freqs(
5285                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5286                 if (!n_channels) {
5287                         err = -EINVAL;
5288                         goto unlock;
5289                 }
5290         } else {
5291                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5292         }
5293
5294         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5295                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5296                         n_ssids++;
5297
5298         if (n_ssids > wiphy->max_scan_ssids) {
5299                 err = -EINVAL;
5300                 goto unlock;
5301         }
5302
5303         if (info->attrs[NL80211_ATTR_IE])
5304                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5305         else
5306                 ie_len = 0;
5307
5308         if (ie_len > wiphy->max_scan_ie_len) {
5309                 err = -EINVAL;
5310                 goto unlock;
5311         }
5312
5313         request = kzalloc(sizeof(*request)
5314                         + sizeof(*request->ssids) * n_ssids
5315                         + sizeof(*request->channels) * n_channels
5316                         + ie_len, GFP_KERNEL);
5317         if (!request) {
5318                 err = -ENOMEM;
5319                 goto unlock;
5320         }
5321
5322         if (n_ssids)
5323                 request->ssids = (void *)&request->channels[n_channels];
5324         request->n_ssids = n_ssids;
5325         if (ie_len) {
5326                 if (request->ssids)
5327                         request->ie = (void *)(request->ssids + n_ssids);
5328                 else
5329                         request->ie = (void *)(request->channels + n_channels);
5330         }
5331
5332         i = 0;
5333         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5334                 /* user specified, bail out if channel not found */
5335                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5336                         struct ieee80211_channel *chan;
5337
5338                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5339
5340                         if (!chan) {
5341                                 err = -EINVAL;
5342                                 goto out_free;
5343                         }
5344
5345                         /* ignore disabled channels */
5346                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5347                                 continue;
5348
5349                         request->channels[i] = chan;
5350                         i++;
5351                 }
5352         } else {
5353                 enum ieee80211_band band;
5354
5355                 /* all channels */
5356                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5357                         int j;
5358                         if (!wiphy->bands[band])
5359                                 continue;
5360                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5361                                 struct ieee80211_channel *chan;
5362
5363                                 chan = &wiphy->bands[band]->channels[j];
5364
5365                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5366                                         continue;
5367
5368                                 request->channels[i] = chan;
5369                                 i++;
5370                         }
5371                 }
5372         }
5373
5374         if (!i) {
5375                 err = -EINVAL;
5376                 goto out_free;
5377         }
5378
5379         request->n_channels = i;
5380
5381         i = 0;
5382         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5383                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5384                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5385                                 err = -EINVAL;
5386                                 goto out_free;
5387                         }
5388                         request->ssids[i].ssid_len = nla_len(attr);
5389                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5390                         i++;
5391                 }
5392         }
5393
5394         if (info->attrs[NL80211_ATTR_IE]) {
5395                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5396                 memcpy((void *)request->ie,
5397                        nla_data(info->attrs[NL80211_ATTR_IE]),
5398                        request->ie_len);
5399         }
5400
5401         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5402                 if (wiphy->bands[i])
5403                         request->rates[i] =
5404                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5405
5406         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5407                 nla_for_each_nested(attr,
5408                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5409                                     tmp) {
5410                         enum ieee80211_band band = nla_type(attr);
5411
5412                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5413                                 err = -EINVAL;
5414                                 goto out_free;
5415                         }
5416
5417                         if (!wiphy->bands[band])
5418                                 continue;
5419
5420                         err = ieee80211_get_ratemask(wiphy->bands[band],
5421                                                      nla_data(attr),
5422                                                      nla_len(attr),
5423                                                      &request->rates[band]);
5424                         if (err)
5425                                 goto out_free;
5426                 }
5427         }
5428
5429         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5430                 request->flags = nla_get_u32(
5431                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5432                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5433                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5434                         err = -EOPNOTSUPP;
5435                         goto out_free;
5436                 }
5437         }
5438
5439         request->no_cck =
5440                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5441
5442         request->wdev = wdev;
5443         request->wiphy = &rdev->wiphy;
5444         request->scan_start = jiffies;
5445
5446         rdev->scan_req = request;
5447         err = rdev_scan(rdev, request);
5448
5449         if (!err) {
5450                 nl80211_send_scan_start(rdev, wdev);
5451                 if (wdev->netdev)
5452                         dev_hold(wdev->netdev);
5453         } else {
5454  out_free:
5455                 rdev->scan_req = NULL;
5456                 kfree(request);
5457         }
5458
5459  unlock:
5460         return err;
5461 }
5462
5463 static int nl80211_start_sched_scan(struct sk_buff *skb,
5464                                     struct genl_info *info)
5465 {
5466         struct cfg80211_sched_scan_request *request;
5467         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5468         struct net_device *dev = info->user_ptr[1];
5469         struct nlattr *attr;
5470         struct wiphy *wiphy;
5471         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5472         u32 interval;
5473         enum ieee80211_band band;
5474         size_t ie_len;
5475         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5476         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
5477
5478         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5479             !rdev->ops->sched_scan_start)
5480                 return -EOPNOTSUPP;
5481
5482         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5483                 return -EINVAL;
5484
5485         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5486                 return -EINVAL;
5487
5488         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5489         if (interval == 0)
5490                 return -EINVAL;
5491
5492         wiphy = &rdev->wiphy;
5493
5494         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5495                 n_channels = validate_scan_freqs(
5496                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5497                 if (!n_channels)
5498                         return -EINVAL;
5499         } else {
5500                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5501         }
5502
5503         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5504                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5505                                     tmp)
5506                         n_ssids++;
5507
5508         if (n_ssids > wiphy->max_sched_scan_ssids)
5509                 return -EINVAL;
5510
5511         /*
5512          * First, count the number of 'real' matchsets. Due to an issue with
5513          * the old implementation, matchsets containing only the RSSI attribute
5514          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
5515          * RSSI for all matchsets, rather than their own matchset for reporting
5516          * all APs with a strong RSSI. This is needed to be compatible with
5517          * older userspace that treated a matchset with only the RSSI as the
5518          * global RSSI for all other matchsets - if there are other matchsets.
5519          */
5520         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5521                 nla_for_each_nested(attr,
5522                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5523                                     tmp) {
5524                         struct nlattr *rssi;
5525
5526                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5527                                         nla_data(attr), nla_len(attr),
5528                                         nl80211_match_policy);
5529                         if (err)
5530                                 return err;
5531                         /* add other standalone attributes here */
5532                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
5533                                 n_match_sets++;
5534                                 continue;
5535                         }
5536                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5537                         if (rssi)
5538                                 default_match_rssi = nla_get_s32(rssi);
5539                 }
5540         }
5541
5542         /* However, if there's no other matchset, add the RSSI one */
5543         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
5544                 n_match_sets = 1;
5545
5546         if (n_match_sets > wiphy->max_match_sets)
5547                 return -EINVAL;
5548
5549         if (info->attrs[NL80211_ATTR_IE])
5550                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5551         else
5552                 ie_len = 0;
5553
5554         if (ie_len > wiphy->max_sched_scan_ie_len)
5555                 return -EINVAL;
5556
5557         if (rdev->sched_scan_req) {
5558                 err = -EINPROGRESS;
5559                 goto out;
5560         }
5561
5562         request = kzalloc(sizeof(*request)
5563                         + sizeof(*request->ssids) * n_ssids
5564                         + sizeof(*request->match_sets) * n_match_sets
5565                         + sizeof(*request->channels) * n_channels
5566                         + ie_len, GFP_KERNEL);
5567         if (!request) {
5568                 err = -ENOMEM;
5569                 goto out;
5570         }
5571
5572         if (n_ssids)
5573                 request->ssids = (void *)&request->channels[n_channels];
5574         request->n_ssids = n_ssids;
5575         if (ie_len) {
5576                 if (request->ssids)
5577                         request->ie = (void *)(request->ssids + n_ssids);
5578                 else
5579                         request->ie = (void *)(request->channels + n_channels);
5580         }
5581
5582         if (n_match_sets) {
5583                 if (request->ie)
5584                         request->match_sets = (void *)(request->ie + ie_len);
5585                 else if (request->ssids)
5586                         request->match_sets =
5587                                 (void *)(request->ssids + n_ssids);
5588                 else
5589                         request->match_sets =
5590                                 (void *)(request->channels + n_channels);
5591         }
5592         request->n_match_sets = n_match_sets;
5593
5594         i = 0;
5595         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5596                 /* user specified, bail out if channel not found */
5597                 nla_for_each_nested(attr,
5598                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5599                                     tmp) {
5600                         struct ieee80211_channel *chan;
5601
5602                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5603
5604                         if (!chan) {
5605                                 err = -EINVAL;
5606                                 goto out_free;
5607                         }
5608
5609                         /* ignore disabled channels */
5610                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5611                                 continue;
5612
5613                         request->channels[i] = chan;
5614                         i++;
5615                 }
5616         } else {
5617                 /* all channels */
5618                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5619                         int j;
5620                         if (!wiphy->bands[band])
5621                                 continue;
5622                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5623                                 struct ieee80211_channel *chan;
5624
5625                                 chan = &wiphy->bands[band]->channels[j];
5626
5627                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5628                                         continue;
5629
5630                                 request->channels[i] = chan;
5631                                 i++;
5632                         }
5633                 }
5634         }
5635
5636         if (!i) {
5637                 err = -EINVAL;
5638                 goto out_free;
5639         }
5640
5641         request->n_channels = i;
5642
5643         i = 0;
5644         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5645                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5646                                     tmp) {
5647                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5648                                 err = -EINVAL;
5649                                 goto out_free;
5650                         }
5651                         request->ssids[i].ssid_len = nla_len(attr);
5652                         memcpy(request->ssids[i].ssid, nla_data(attr),
5653                                nla_len(attr));
5654                         i++;
5655                 }
5656         }
5657
5658         i = 0;
5659         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5660                 nla_for_each_nested(attr,
5661                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5662                                     tmp) {
5663                         struct nlattr *ssid, *rssi;
5664
5665                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5666                                         nla_data(attr), nla_len(attr),
5667                                         nl80211_match_policy);
5668                         if (err)
5669                                 goto out_free;
5670                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5671                         if (ssid) {
5672                                 if (WARN_ON(i >= n_match_sets)) {
5673                                         /* this indicates a programming error,
5674                                          * the loop above should have verified
5675                                          * things properly
5676                                          */
5677                                         err = -EINVAL;
5678                                         goto out_free;
5679                                 }
5680
5681                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5682                                         err = -EINVAL;
5683                                         goto out_free;
5684                                 }
5685                                 memcpy(request->match_sets[i].ssid.ssid,
5686                                        nla_data(ssid), nla_len(ssid));
5687                                 request->match_sets[i].ssid.ssid_len =
5688                                         nla_len(ssid);
5689                                 /* special attribute - old implemenation w/a */
5690                                 request->match_sets[i].rssi_thold =
5691                                         default_match_rssi;
5692                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5693                                 if (rssi)
5694                                         request->match_sets[i].rssi_thold =
5695                                                 nla_get_s32(rssi);
5696                         }
5697                         i++;
5698                 }
5699
5700                 /* there was no other matchset, so the RSSI one is alone */
5701                 if (i == 0)
5702                         request->match_sets[0].rssi_thold = default_match_rssi;
5703
5704                 request->min_rssi_thold = INT_MAX;
5705                 for (i = 0; i < n_match_sets; i++)
5706                         request->min_rssi_thold =
5707                                 min(request->match_sets[i].rssi_thold,
5708                                     request->min_rssi_thold);
5709         } else {
5710                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
5711         }
5712
5713         if (ie_len) {
5714                 request->ie_len = ie_len;
5715                 memcpy((void *)request->ie,
5716                        nla_data(info->attrs[NL80211_ATTR_IE]),
5717                        request->ie_len);
5718         }
5719
5720         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5721                 request->flags = nla_get_u32(
5722                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5723                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5724                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5725                         err = -EOPNOTSUPP;
5726                         goto out_free;
5727                 }
5728         }
5729
5730         request->dev = dev;
5731         request->wiphy = &rdev->wiphy;
5732         request->interval = interval;
5733         request->scan_start = jiffies;
5734
5735         err = rdev_sched_scan_start(rdev, dev, request);
5736         if (!err) {
5737                 rdev->sched_scan_req = request;
5738                 nl80211_send_sched_scan(rdev, dev,
5739                                         NL80211_CMD_START_SCHED_SCAN);
5740                 goto out;
5741         }
5742
5743 out_free:
5744         kfree(request);
5745 out:
5746         return err;
5747 }
5748
5749 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5750                                    struct genl_info *info)
5751 {
5752         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5753
5754         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5755             !rdev->ops->sched_scan_stop)
5756                 return -EOPNOTSUPP;
5757
5758         return __cfg80211_stop_sched_scan(rdev, false);
5759 }
5760
5761 static int nl80211_start_radar_detection(struct sk_buff *skb,
5762                                          struct genl_info *info)
5763 {
5764         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5765         struct net_device *dev = info->user_ptr[1];
5766         struct wireless_dev *wdev = dev->ieee80211_ptr;
5767         struct cfg80211_chan_def chandef;
5768         enum nl80211_dfs_regions dfs_region;
5769         int err;
5770
5771         dfs_region = reg_get_dfs_region(wdev->wiphy);
5772         if (dfs_region == NL80211_DFS_UNSET)
5773                 return -EINVAL;
5774
5775         err = nl80211_parse_chandef(rdev, info, &chandef);
5776         if (err)
5777                 return err;
5778
5779         if (netif_carrier_ok(dev))
5780                 return -EBUSY;
5781
5782         if (wdev->cac_started)
5783                 return -EBUSY;
5784
5785         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5786         if (err < 0)
5787                 return err;
5788
5789         if (err == 0)
5790                 return -EINVAL;
5791
5792         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
5793                 return -EINVAL;
5794
5795         if (!rdev->ops->start_radar_detection)
5796                 return -EOPNOTSUPP;
5797
5798         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5799                                            chandef.chan, CHAN_MODE_SHARED,
5800                                            BIT(chandef.width));
5801         if (err)
5802                 return err;
5803
5804         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5805         if (!err) {
5806                 wdev->chandef = chandef;
5807                 wdev->cac_started = true;
5808                 wdev->cac_start_time = jiffies;
5809         }
5810         return err;
5811 }
5812
5813 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5814 {
5815         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5816         struct net_device *dev = info->user_ptr[1];
5817         struct wireless_dev *wdev = dev->ieee80211_ptr;
5818         struct cfg80211_csa_settings params;
5819         /* csa_attrs is defined static to avoid waste of stack size - this
5820          * function is called under RTNL lock, so this should not be a problem.
5821          */
5822         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5823         u8 radar_detect_width = 0;
5824         int err;
5825         bool need_new_beacon = false;
5826
5827         if (!rdev->ops->channel_switch ||
5828             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5829                 return -EOPNOTSUPP;
5830
5831         switch (dev->ieee80211_ptr->iftype) {
5832         case NL80211_IFTYPE_AP:
5833         case NL80211_IFTYPE_P2P_GO:
5834                 need_new_beacon = true;
5835
5836                 /* useless if AP is not running */
5837                 if (!wdev->beacon_interval)
5838                         return -ENOTCONN;
5839                 break;
5840         case NL80211_IFTYPE_ADHOC:
5841                 if (!wdev->ssid_len)
5842                         return -ENOTCONN;
5843                 break;
5844         case NL80211_IFTYPE_MESH_POINT:
5845                 if (!wdev->mesh_id_len)
5846                         return -ENOTCONN;
5847                 break;
5848         default:
5849                 return -EOPNOTSUPP;
5850         }
5851
5852         memset(&params, 0, sizeof(params));
5853
5854         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5855             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5856                 return -EINVAL;
5857
5858         /* only important for AP, IBSS and mesh create IEs internally */
5859         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
5860                 return -EINVAL;
5861
5862         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5863
5864         if (!need_new_beacon)
5865                 goto skip_beacons;
5866
5867         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5868         if (err)
5869                 return err;
5870
5871         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5872                                info->attrs[NL80211_ATTR_CSA_IES],
5873                                nl80211_policy);
5874         if (err)
5875                 return err;
5876
5877         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5878         if (err)
5879                 return err;
5880
5881         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5882                 return -EINVAL;
5883
5884         params.counter_offset_beacon =
5885                 nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5886         if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
5887                 return -EINVAL;
5888
5889         /* sanity check - counters should be the same */
5890         if (params.beacon_csa.tail[params.counter_offset_beacon] !=
5891             params.count)
5892                 return -EINVAL;
5893
5894         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5895                 params.counter_offset_presp =
5896                         nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5897                 if (params.counter_offset_presp >=
5898                     params.beacon_csa.probe_resp_len)
5899                         return -EINVAL;
5900
5901                 if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
5902                     params.count)
5903                         return -EINVAL;
5904         }
5905
5906 skip_beacons:
5907         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5908         if (err)
5909                 return err;
5910
5911         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
5912                 return -EINVAL;
5913
5914         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
5915             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO ||
5916             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC) {
5917                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
5918                                                     &params.chandef);
5919                 if (err < 0) {
5920                         return err;
5921                 } else if (err) {
5922                         radar_detect_width = BIT(params.chandef.width);
5923                         params.radar_required = true;
5924                 }
5925         }
5926
5927         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5928                                            params.chandef.chan,
5929                                            CHAN_MODE_SHARED,
5930                                            radar_detect_width);
5931         if (err)
5932                 return err;
5933
5934         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
5935                 params.block_tx = true;
5936
5937         wdev_lock(wdev);
5938         err = rdev_channel_switch(rdev, dev, &params);
5939         wdev_unlock(wdev);
5940
5941         return err;
5942 }
5943
5944 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5945                             u32 seq, int flags,
5946                             struct cfg80211_registered_device *rdev,
5947                             struct wireless_dev *wdev,
5948                             struct cfg80211_internal_bss *intbss)
5949 {
5950         struct cfg80211_bss *res = &intbss->pub;
5951         const struct cfg80211_bss_ies *ies;
5952         void *hdr;
5953         struct nlattr *bss;
5954         bool tsf = false;
5955
5956         ASSERT_WDEV_LOCK(wdev);
5957
5958         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5959                              NL80211_CMD_NEW_SCAN_RESULTS);
5960         if (!hdr)
5961                 return -1;
5962
5963         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5964
5965         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5966                 goto nla_put_failure;
5967         if (wdev->netdev &&
5968             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5969                 goto nla_put_failure;
5970         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5971                 goto nla_put_failure;
5972
5973         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5974         if (!bss)
5975                 goto nla_put_failure;
5976         if ((!is_zero_ether_addr(res->bssid) &&
5977              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5978                 goto nla_put_failure;
5979
5980         rcu_read_lock();
5981         ies = rcu_dereference(res->ies);
5982         if (ies) {
5983                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5984                         goto fail_unlock_rcu;
5985                 tsf = true;
5986                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5987                                         ies->len, ies->data))
5988                         goto fail_unlock_rcu;
5989         }
5990         ies = rcu_dereference(res->beacon_ies);
5991         if (ies) {
5992                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5993                         goto fail_unlock_rcu;
5994                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5995                                         ies->len, ies->data))
5996                         goto fail_unlock_rcu;
5997         }
5998         rcu_read_unlock();
5999
6000         if (res->beacon_interval &&
6001             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6002                 goto nla_put_failure;
6003         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6004             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6005             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6006             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6007                         jiffies_to_msecs(jiffies - intbss->ts)))
6008                 goto nla_put_failure;
6009
6010         switch (rdev->wiphy.signal_type) {
6011         case CFG80211_SIGNAL_TYPE_MBM:
6012                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6013                         goto nla_put_failure;
6014                 break;
6015         case CFG80211_SIGNAL_TYPE_UNSPEC:
6016                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6017                         goto nla_put_failure;
6018                 break;
6019         default:
6020                 break;
6021         }
6022
6023         switch (wdev->iftype) {
6024         case NL80211_IFTYPE_P2P_CLIENT:
6025         case NL80211_IFTYPE_STATION:
6026                 if (intbss == wdev->current_bss &&
6027                     nla_put_u32(msg, NL80211_BSS_STATUS,
6028                                 NL80211_BSS_STATUS_ASSOCIATED))
6029                         goto nla_put_failure;
6030                 break;
6031         case NL80211_IFTYPE_ADHOC:
6032                 if (intbss == wdev->current_bss &&
6033                     nla_put_u32(msg, NL80211_BSS_STATUS,
6034                                 NL80211_BSS_STATUS_IBSS_JOINED))
6035                         goto nla_put_failure;
6036                 break;
6037         default:
6038                 break;
6039         }
6040
6041         nla_nest_end(msg, bss);
6042
6043         return genlmsg_end(msg, hdr);
6044
6045  fail_unlock_rcu:
6046         rcu_read_unlock();
6047  nla_put_failure:
6048         genlmsg_cancel(msg, hdr);
6049         return -EMSGSIZE;
6050 }
6051
6052 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6053 {
6054         struct cfg80211_registered_device *rdev;
6055         struct cfg80211_internal_bss *scan;
6056         struct wireless_dev *wdev;
6057         int start = cb->args[2], idx = 0;
6058         int err;
6059
6060         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6061         if (err)
6062                 return err;
6063
6064         wdev_lock(wdev);
6065         spin_lock_bh(&rdev->bss_lock);
6066         cfg80211_bss_expire(rdev);
6067
6068         cb->seq = rdev->bss_generation;
6069
6070         list_for_each_entry(scan, &rdev->bss_list, list) {
6071                 if (++idx <= start)
6072                         continue;
6073                 if (nl80211_send_bss(skb, cb,
6074                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6075                                 rdev, wdev, scan) < 0) {
6076                         idx--;
6077                         break;
6078                 }
6079         }
6080
6081         spin_unlock_bh(&rdev->bss_lock);
6082         wdev_unlock(wdev);
6083
6084         cb->args[2] = idx;
6085         nl80211_finish_wdev_dump(rdev);
6086
6087         return skb->len;
6088 }
6089
6090 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6091                                 int flags, struct net_device *dev,
6092                                 struct survey_info *survey)
6093 {
6094         void *hdr;
6095         struct nlattr *infoattr;
6096
6097         hdr = nl80211hdr_put(msg, portid, seq, flags,
6098                              NL80211_CMD_NEW_SURVEY_RESULTS);
6099         if (!hdr)
6100                 return -ENOMEM;
6101
6102         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6103                 goto nla_put_failure;
6104
6105         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6106         if (!infoattr)
6107                 goto nla_put_failure;
6108
6109         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6110                         survey->channel->center_freq))
6111                 goto nla_put_failure;
6112
6113         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6114             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6115                 goto nla_put_failure;
6116         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6117             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6118                 goto nla_put_failure;
6119         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6120             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6121                         survey->channel_time))
6122                 goto nla_put_failure;
6123         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6124             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6125                         survey->channel_time_busy))
6126                 goto nla_put_failure;
6127         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6128             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6129                         survey->channel_time_ext_busy))
6130                 goto nla_put_failure;
6131         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6132             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6133                         survey->channel_time_rx))
6134                 goto nla_put_failure;
6135         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6136             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6137                         survey->channel_time_tx))
6138                 goto nla_put_failure;
6139
6140         nla_nest_end(msg, infoattr);
6141
6142         return genlmsg_end(msg, hdr);
6143
6144  nla_put_failure:
6145         genlmsg_cancel(msg, hdr);
6146         return -EMSGSIZE;
6147 }
6148
6149 static int nl80211_dump_survey(struct sk_buff *skb,
6150                         struct netlink_callback *cb)
6151 {
6152         struct survey_info survey;
6153         struct cfg80211_registered_device *dev;
6154         struct wireless_dev *wdev;
6155         int survey_idx = cb->args[2];
6156         int res;
6157
6158         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
6159         if (res)
6160                 return res;
6161
6162         if (!wdev->netdev) {
6163                 res = -EINVAL;
6164                 goto out_err;
6165         }
6166
6167         if (!dev->ops->dump_survey) {
6168                 res = -EOPNOTSUPP;
6169                 goto out_err;
6170         }
6171
6172         while (1) {
6173                 struct ieee80211_channel *chan;
6174
6175                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
6176                 if (res == -ENOENT)
6177                         break;
6178                 if (res)
6179                         goto out_err;
6180
6181                 /* Survey without a channel doesn't make sense */
6182                 if (!survey.channel) {
6183                         res = -EINVAL;
6184                         goto out;
6185                 }
6186
6187                 chan = ieee80211_get_channel(&dev->wiphy,
6188                                              survey.channel->center_freq);
6189                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6190                         survey_idx++;
6191                         continue;
6192                 }
6193
6194                 if (nl80211_send_survey(skb,
6195                                 NETLINK_CB(cb->skb).portid,
6196                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6197                                 wdev->netdev, &survey) < 0)
6198                         goto out;
6199                 survey_idx++;
6200         }
6201
6202  out:
6203         cb->args[2] = survey_idx;
6204         res = skb->len;
6205  out_err:
6206         nl80211_finish_wdev_dump(dev);
6207         return res;
6208 }
6209
6210 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6211 {
6212         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6213                                   NL80211_WPA_VERSION_2));
6214 }
6215
6216 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6217 {
6218         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6219         struct net_device *dev = info->user_ptr[1];
6220         struct ieee80211_channel *chan;
6221         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6222         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6223         enum nl80211_auth_type auth_type;
6224         struct key_parse key;
6225         bool local_state_change;
6226
6227         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6228                 return -EINVAL;
6229
6230         if (!info->attrs[NL80211_ATTR_MAC])
6231                 return -EINVAL;
6232
6233         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6234                 return -EINVAL;
6235
6236         if (!info->attrs[NL80211_ATTR_SSID])
6237                 return -EINVAL;
6238
6239         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6240                 return -EINVAL;
6241
6242         err = nl80211_parse_key(info, &key);
6243         if (err)
6244                 return err;
6245
6246         if (key.idx >= 0) {
6247                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6248                         return -EINVAL;
6249                 if (!key.p.key || !key.p.key_len)
6250                         return -EINVAL;
6251                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6252                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6253                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6254                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6255                         return -EINVAL;
6256                 if (key.idx > 4)
6257                         return -EINVAL;
6258         } else {
6259                 key.p.key_len = 0;
6260                 key.p.key = NULL;
6261         }
6262
6263         if (key.idx >= 0) {
6264                 int i;
6265                 bool ok = false;
6266                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6267                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6268                                 ok = true;
6269                                 break;
6270                         }
6271                 }
6272                 if (!ok)
6273                         return -EINVAL;
6274         }
6275
6276         if (!rdev->ops->auth)
6277                 return -EOPNOTSUPP;
6278
6279         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6280             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6281                 return -EOPNOTSUPP;
6282
6283         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6284         chan = nl80211_get_valid_chan(&rdev->wiphy,
6285                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6286         if (!chan)
6287                 return -EINVAL;
6288
6289         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6290         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6291
6292         if (info->attrs[NL80211_ATTR_IE]) {
6293                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6294                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6295         }
6296
6297         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6298         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6299                 return -EINVAL;
6300
6301         if (auth_type == NL80211_AUTHTYPE_SAE &&
6302             !info->attrs[NL80211_ATTR_SAE_DATA])
6303                 return -EINVAL;
6304
6305         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6306                 if (auth_type != NL80211_AUTHTYPE_SAE)
6307                         return -EINVAL;
6308                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6309                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6310                 /* need to include at least Auth Transaction and Status Code */
6311                 if (sae_data_len < 4)
6312                         return -EINVAL;
6313         }
6314
6315         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6316
6317         /*
6318          * Since we no longer track auth state, ignore
6319          * requests to only change local state.
6320          */
6321         if (local_state_change)
6322                 return 0;
6323
6324         wdev_lock(dev->ieee80211_ptr);
6325         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6326                                  ssid, ssid_len, ie, ie_len,
6327                                  key.p.key, key.p.key_len, key.idx,
6328                                  sae_data, sae_data_len);
6329         wdev_unlock(dev->ieee80211_ptr);
6330         return err;
6331 }
6332
6333 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6334                                    struct genl_info *info,
6335                                    struct cfg80211_crypto_settings *settings,
6336                                    int cipher_limit)
6337 {
6338         memset(settings, 0, sizeof(*settings));
6339
6340         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6341
6342         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6343                 u16 proto;
6344                 proto = nla_get_u16(
6345                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6346                 settings->control_port_ethertype = cpu_to_be16(proto);
6347                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6348                     proto != ETH_P_PAE)
6349                         return -EINVAL;
6350                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6351                         settings->control_port_no_encrypt = true;
6352         } else
6353                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6354
6355         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6356                 void *data;
6357                 int len, i;
6358
6359                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6360                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6361                 settings->n_ciphers_pairwise = len / sizeof(u32);
6362
6363                 if (len % sizeof(u32))
6364                         return -EINVAL;
6365
6366                 if (settings->n_ciphers_pairwise > cipher_limit)
6367                         return -EINVAL;
6368
6369                 memcpy(settings->ciphers_pairwise, data, len);
6370
6371                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6372                         if (!cfg80211_supported_cipher_suite(
6373                                         &rdev->wiphy,
6374                                         settings->ciphers_pairwise[i]))
6375                                 return -EINVAL;
6376         }
6377
6378         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6379                 settings->cipher_group =
6380                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6381                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6382                                                      settings->cipher_group))
6383                         return -EINVAL;
6384         }
6385
6386         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6387                 settings->wpa_versions =
6388                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6389                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6390                         return -EINVAL;
6391         }
6392
6393         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6394                 void *data;
6395                 int len;
6396
6397                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6398                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6399                 settings->n_akm_suites = len / sizeof(u32);
6400
6401                 if (len % sizeof(u32))
6402                         return -EINVAL;
6403
6404                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6405                         return -EINVAL;
6406
6407                 memcpy(settings->akm_suites, data, len);
6408         }
6409
6410         return 0;
6411 }
6412
6413 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6414 {
6415         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6416         struct net_device *dev = info->user_ptr[1];
6417         struct ieee80211_channel *chan;
6418         struct cfg80211_assoc_request req = {};
6419         const u8 *bssid, *ssid;
6420         int err, ssid_len = 0;
6421
6422         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6423                 return -EINVAL;
6424
6425         if (!info->attrs[NL80211_ATTR_MAC] ||
6426             !info->attrs[NL80211_ATTR_SSID] ||
6427             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6428                 return -EINVAL;
6429
6430         if (!rdev->ops->assoc)
6431                 return -EOPNOTSUPP;
6432
6433         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6434             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6435                 return -EOPNOTSUPP;
6436
6437         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6438
6439         chan = nl80211_get_valid_chan(&rdev->wiphy,
6440                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6441         if (!chan)
6442                 return -EINVAL;
6443
6444         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6445         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6446
6447         if (info->attrs[NL80211_ATTR_IE]) {
6448                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6449                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6450         }
6451
6452         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6453                 enum nl80211_mfp mfp =
6454                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6455                 if (mfp == NL80211_MFP_REQUIRED)
6456                         req.use_mfp = true;
6457                 else if (mfp != NL80211_MFP_NO)
6458                         return -EINVAL;
6459         }
6460
6461         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6462                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6463
6464         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6465                 req.flags |= ASSOC_REQ_DISABLE_HT;
6466
6467         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6468                 memcpy(&req.ht_capa_mask,
6469                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6470                        sizeof(req.ht_capa_mask));
6471
6472         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6473                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6474                         return -EINVAL;
6475                 memcpy(&req.ht_capa,
6476                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6477                        sizeof(req.ht_capa));
6478         }
6479
6480         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6481                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6482
6483         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6484                 memcpy(&req.vht_capa_mask,
6485                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6486                        sizeof(req.vht_capa_mask));
6487
6488         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6489                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6490                         return -EINVAL;
6491                 memcpy(&req.vht_capa,
6492                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6493                        sizeof(req.vht_capa));
6494         }
6495
6496         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6497         if (!err) {
6498                 wdev_lock(dev->ieee80211_ptr);
6499                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6500                                           ssid, ssid_len, &req);
6501                 wdev_unlock(dev->ieee80211_ptr);
6502         }
6503
6504         return err;
6505 }
6506
6507 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6508 {
6509         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6510         struct net_device *dev = info->user_ptr[1];
6511         const u8 *ie = NULL, *bssid;
6512         int ie_len = 0, err;
6513         u16 reason_code;
6514         bool local_state_change;
6515
6516         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6517                 return -EINVAL;
6518
6519         if (!info->attrs[NL80211_ATTR_MAC])
6520                 return -EINVAL;
6521
6522         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6523                 return -EINVAL;
6524
6525         if (!rdev->ops->deauth)
6526                 return -EOPNOTSUPP;
6527
6528         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6529             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6530                 return -EOPNOTSUPP;
6531
6532         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6533
6534         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6535         if (reason_code == 0) {
6536                 /* Reason Code 0 is reserved */
6537                 return -EINVAL;
6538         }
6539
6540         if (info->attrs[NL80211_ATTR_IE]) {
6541                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6542                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6543         }
6544
6545         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6546
6547         wdev_lock(dev->ieee80211_ptr);
6548         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6549                                    local_state_change);
6550         wdev_unlock(dev->ieee80211_ptr);
6551         return err;
6552 }
6553
6554 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6555 {
6556         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6557         struct net_device *dev = info->user_ptr[1];
6558         const u8 *ie = NULL, *bssid;
6559         int ie_len = 0, err;
6560         u16 reason_code;
6561         bool local_state_change;
6562
6563         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6564                 return -EINVAL;
6565
6566         if (!info->attrs[NL80211_ATTR_MAC])
6567                 return -EINVAL;
6568
6569         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6570                 return -EINVAL;
6571
6572         if (!rdev->ops->disassoc)
6573                 return -EOPNOTSUPP;
6574
6575         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6576             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6577                 return -EOPNOTSUPP;
6578
6579         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6580
6581         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6582         if (reason_code == 0) {
6583                 /* Reason Code 0 is reserved */
6584                 return -EINVAL;
6585         }
6586
6587         if (info->attrs[NL80211_ATTR_IE]) {
6588                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6589                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6590         }
6591
6592         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6593
6594         wdev_lock(dev->ieee80211_ptr);
6595         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6596                                      local_state_change);
6597         wdev_unlock(dev->ieee80211_ptr);
6598         return err;
6599 }
6600
6601 static bool
6602 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6603                          int mcast_rate[IEEE80211_NUM_BANDS],
6604                          int rateval)
6605 {
6606         struct wiphy *wiphy = &rdev->wiphy;
6607         bool found = false;
6608         int band, i;
6609
6610         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6611                 struct ieee80211_supported_band *sband;
6612
6613                 sband = wiphy->bands[band];
6614                 if (!sband)
6615                         continue;
6616
6617                 for (i = 0; i < sband->n_bitrates; i++) {
6618                         if (sband->bitrates[i].bitrate == rateval) {
6619                                 mcast_rate[band] = i + 1;
6620                                 found = true;
6621                                 break;
6622                         }
6623                 }
6624         }
6625
6626         return found;
6627 }
6628
6629 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6630 {
6631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6632         struct net_device *dev = info->user_ptr[1];
6633         struct cfg80211_ibss_params ibss;
6634         struct wiphy *wiphy;
6635         struct cfg80211_cached_keys *connkeys = NULL;
6636         int err;
6637
6638         memset(&ibss, 0, sizeof(ibss));
6639
6640         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6641                 return -EINVAL;
6642
6643         if (!info->attrs[NL80211_ATTR_SSID] ||
6644             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6645                 return -EINVAL;
6646
6647         ibss.beacon_interval = 100;
6648
6649         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6650                 ibss.beacon_interval =
6651                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6652                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6653                         return -EINVAL;
6654         }
6655
6656         if (!rdev->ops->join_ibss)
6657                 return -EOPNOTSUPP;
6658
6659         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6660                 return -EOPNOTSUPP;
6661
6662         wiphy = &rdev->wiphy;
6663
6664         if (info->attrs[NL80211_ATTR_MAC]) {
6665                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6666
6667                 if (!is_valid_ether_addr(ibss.bssid))
6668                         return -EINVAL;
6669         }
6670         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6671         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6672
6673         if (info->attrs[NL80211_ATTR_IE]) {
6674                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6675                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6676         }
6677
6678         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6679         if (err)
6680                 return err;
6681
6682         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6683                 return -EINVAL;
6684
6685         switch (ibss.chandef.width) {
6686         case NL80211_CHAN_WIDTH_5:
6687         case NL80211_CHAN_WIDTH_10:
6688         case NL80211_CHAN_WIDTH_20_NOHT:
6689                 break;
6690         case NL80211_CHAN_WIDTH_20:
6691         case NL80211_CHAN_WIDTH_40:
6692                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6693                         break;
6694         default:
6695                 return -EINVAL;
6696         }
6697
6698         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6699         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6700
6701         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6702                 u8 *rates =
6703                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6704                 int n_rates =
6705                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6706                 struct ieee80211_supported_band *sband =
6707                         wiphy->bands[ibss.chandef.chan->band];
6708
6709                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6710                                              &ibss.basic_rates);
6711                 if (err)
6712                         return err;
6713         }
6714
6715         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6716                 memcpy(&ibss.ht_capa_mask,
6717                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6718                        sizeof(ibss.ht_capa_mask));
6719
6720         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6721                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6722                         return -EINVAL;
6723                 memcpy(&ibss.ht_capa,
6724                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6725                        sizeof(ibss.ht_capa));
6726         }
6727
6728         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6729             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6730                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6731                 return -EINVAL;
6732
6733         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6734                 bool no_ht = false;
6735
6736                 connkeys = nl80211_parse_connkeys(rdev,
6737                                           info->attrs[NL80211_ATTR_KEYS],
6738                                           &no_ht);
6739                 if (IS_ERR(connkeys))
6740                         return PTR_ERR(connkeys);
6741
6742                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6743                     no_ht) {
6744                         kfree(connkeys);
6745                         return -EINVAL;
6746                 }
6747         }
6748
6749         ibss.control_port =
6750                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6751
6752         ibss.userspace_handles_dfs =
6753                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6754
6755         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6756         if (err)
6757                 kfree(connkeys);
6758         return err;
6759 }
6760
6761 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6762 {
6763         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6764         struct net_device *dev = info->user_ptr[1];
6765
6766         if (!rdev->ops->leave_ibss)
6767                 return -EOPNOTSUPP;
6768
6769         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6770                 return -EOPNOTSUPP;
6771
6772         return cfg80211_leave_ibss(rdev, dev, false);
6773 }
6774
6775 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6776 {
6777         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6778         struct net_device *dev = info->user_ptr[1];
6779         int mcast_rate[IEEE80211_NUM_BANDS];
6780         u32 nla_rate;
6781         int err;
6782
6783         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6784             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6785                 return -EOPNOTSUPP;
6786
6787         if (!rdev->ops->set_mcast_rate)
6788                 return -EOPNOTSUPP;
6789
6790         memset(mcast_rate, 0, sizeof(mcast_rate));
6791
6792         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6793                 return -EINVAL;
6794
6795         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6796         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6797                 return -EINVAL;
6798
6799         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6800
6801         return err;
6802 }
6803
6804 static struct sk_buff *
6805 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
6806                             int approxlen, u32 portid, u32 seq,
6807                             enum nl80211_commands cmd,
6808                             enum nl80211_attrs attr,
6809                             const struct nl80211_vendor_cmd_info *info,
6810                             gfp_t gfp)
6811 {
6812         struct sk_buff *skb;
6813         void *hdr;
6814         struct nlattr *data;
6815
6816         skb = nlmsg_new(approxlen + 100, gfp);
6817         if (!skb)
6818                 return NULL;
6819
6820         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
6821         if (!hdr) {
6822                 kfree_skb(skb);
6823                 return NULL;
6824         }
6825
6826         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6827                 goto nla_put_failure;
6828
6829         if (info) {
6830                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
6831                                 info->vendor_id))
6832                         goto nla_put_failure;
6833                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
6834                                 info->subcmd))
6835                         goto nla_put_failure;
6836         }
6837
6838         data = nla_nest_start(skb, attr);
6839
6840         ((void **)skb->cb)[0] = rdev;
6841         ((void **)skb->cb)[1] = hdr;
6842         ((void **)skb->cb)[2] = data;
6843
6844         return skb;
6845
6846  nla_put_failure:
6847         kfree_skb(skb);
6848         return NULL;
6849 }
6850
6851 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
6852                                            enum nl80211_commands cmd,
6853                                            enum nl80211_attrs attr,
6854                                            int vendor_event_idx,
6855                                            int approxlen, gfp_t gfp)
6856 {
6857         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6858         const struct nl80211_vendor_cmd_info *info;
6859
6860         switch (cmd) {
6861         case NL80211_CMD_TESTMODE:
6862                 if (WARN_ON(vendor_event_idx != -1))
6863                         return NULL;
6864                 info = NULL;
6865                 break;
6866         case NL80211_CMD_VENDOR:
6867                 if (WARN_ON(vendor_event_idx < 0 ||
6868                             vendor_event_idx >= wiphy->n_vendor_events))
6869                         return NULL;
6870                 info = &wiphy->vendor_events[vendor_event_idx];
6871                 break;
6872         default:
6873                 WARN_ON(1);
6874                 return NULL;
6875         }
6876
6877         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
6878                                            cmd, attr, info, gfp);
6879 }
6880 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
6881
6882 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
6883 {
6884         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6885         void *hdr = ((void **)skb->cb)[1];
6886         struct nlattr *data = ((void **)skb->cb)[2];
6887         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
6888
6889         nla_nest_end(skb, data);
6890         genlmsg_end(skb, hdr);
6891
6892         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
6893                 mcgrp = NL80211_MCGRP_VENDOR;
6894
6895         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
6896                                 mcgrp, gfp);
6897 }
6898 EXPORT_SYMBOL(__cfg80211_send_event_skb);
6899
6900 #ifdef CONFIG_NL80211_TESTMODE
6901 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6902 {
6903         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6904         struct wireless_dev *wdev =
6905                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6906         int err;
6907
6908         if (!rdev->ops->testmode_cmd)
6909                 return -EOPNOTSUPP;
6910
6911         if (IS_ERR(wdev)) {
6912                 err = PTR_ERR(wdev);
6913                 if (err != -EINVAL)
6914                         return err;
6915                 wdev = NULL;
6916         } else if (wdev->wiphy != &rdev->wiphy) {
6917                 return -EINVAL;
6918         }
6919
6920         if (!info->attrs[NL80211_ATTR_TESTDATA])
6921                 return -EINVAL;
6922
6923         rdev->cur_cmd_info = info;
6924         err = rdev_testmode_cmd(rdev, wdev,
6925                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6926                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6927         rdev->cur_cmd_info = NULL;
6928
6929         return err;
6930 }
6931
6932 static int nl80211_testmode_dump(struct sk_buff *skb,
6933                                  struct netlink_callback *cb)
6934 {
6935         struct cfg80211_registered_device *rdev;
6936         int err;
6937         long phy_idx;
6938         void *data = NULL;
6939         int data_len = 0;
6940
6941         rtnl_lock();
6942
6943         if (cb->args[0]) {
6944                 /*
6945                  * 0 is a valid index, but not valid for args[0],
6946                  * so we need to offset by 1.
6947                  */
6948                 phy_idx = cb->args[0] - 1;
6949         } else {
6950                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6951                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6952                                   nl80211_policy);
6953                 if (err)
6954                         goto out_err;
6955
6956                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6957                                                   nl80211_fam.attrbuf);
6958                 if (IS_ERR(rdev)) {
6959                         err = PTR_ERR(rdev);
6960                         goto out_err;
6961                 }
6962                 phy_idx = rdev->wiphy_idx;
6963                 rdev = NULL;
6964
6965                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6966                         cb->args[1] =
6967                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6968         }
6969
6970         if (cb->args[1]) {
6971                 data = nla_data((void *)cb->args[1]);
6972                 data_len = nla_len((void *)cb->args[1]);
6973         }
6974
6975         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6976         if (!rdev) {
6977                 err = -ENOENT;
6978                 goto out_err;
6979         }
6980
6981         if (!rdev->ops->testmode_dump) {
6982                 err = -EOPNOTSUPP;
6983                 goto out_err;
6984         }
6985
6986         while (1) {
6987                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6988                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6989                                            NL80211_CMD_TESTMODE);
6990                 struct nlattr *tmdata;
6991
6992                 if (!hdr)
6993                         break;
6994
6995                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6996                         genlmsg_cancel(skb, hdr);
6997                         break;
6998                 }
6999
7000                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7001                 if (!tmdata) {
7002                         genlmsg_cancel(skb, hdr);
7003                         break;
7004                 }
7005                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7006                 nla_nest_end(skb, tmdata);
7007
7008                 if (err == -ENOBUFS || err == -ENOENT) {
7009                         genlmsg_cancel(skb, hdr);
7010                         break;
7011                 } else if (err) {
7012                         genlmsg_cancel(skb, hdr);
7013                         goto out_err;
7014                 }
7015
7016                 genlmsg_end(skb, hdr);
7017         }
7018
7019         err = skb->len;
7020         /* see above */
7021         cb->args[0] = phy_idx + 1;
7022  out_err:
7023         rtnl_unlock();
7024         return err;
7025 }
7026 #endif
7027
7028 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7029 {
7030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7031         struct net_device *dev = info->user_ptr[1];
7032         struct cfg80211_connect_params connect;
7033         struct wiphy *wiphy;
7034         struct cfg80211_cached_keys *connkeys = NULL;
7035         int err;
7036
7037         memset(&connect, 0, sizeof(connect));
7038
7039         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7040                 return -EINVAL;
7041
7042         if (!info->attrs[NL80211_ATTR_SSID] ||
7043             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7044                 return -EINVAL;
7045
7046         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7047                 connect.auth_type =
7048                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7049                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7050                                              NL80211_CMD_CONNECT))
7051                         return -EINVAL;
7052         } else
7053                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7054
7055         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7056
7057         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7058                                       NL80211_MAX_NR_CIPHER_SUITES);
7059         if (err)
7060                 return err;
7061
7062         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7063             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7064                 return -EOPNOTSUPP;
7065
7066         wiphy = &rdev->wiphy;
7067
7068         connect.bg_scan_period = -1;
7069         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7070                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7071                 connect.bg_scan_period =
7072                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7073         }
7074
7075         if (info->attrs[NL80211_ATTR_MAC])
7076                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7077         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7078                 connect.bssid_hint =
7079                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7080         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7081         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7082
7083         if (info->attrs[NL80211_ATTR_IE]) {
7084                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7085                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7086         }
7087
7088         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7089                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7090                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7091                     connect.mfp != NL80211_MFP_NO)
7092                         return -EINVAL;
7093         } else {
7094                 connect.mfp = NL80211_MFP_NO;
7095         }
7096
7097         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7098                 connect.channel = nl80211_get_valid_chan(
7099                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7100                 if (!connect.channel)
7101                         return -EINVAL;
7102         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7103                 connect.channel_hint = nl80211_get_valid_chan(
7104                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7105                 if (!connect.channel_hint)
7106                         return -EINVAL;
7107         }
7108
7109         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7110                 connkeys = nl80211_parse_connkeys(rdev,
7111                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7112                 if (IS_ERR(connkeys))
7113                         return PTR_ERR(connkeys);
7114         }
7115
7116         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7117                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7118
7119         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7120                 memcpy(&connect.ht_capa_mask,
7121                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7122                        sizeof(connect.ht_capa_mask));
7123
7124         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7125                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7126                         kfree(connkeys);
7127                         return -EINVAL;
7128                 }
7129                 memcpy(&connect.ht_capa,
7130                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7131                        sizeof(connect.ht_capa));
7132         }
7133
7134         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7135                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7136
7137         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7138                 memcpy(&connect.vht_capa_mask,
7139                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7140                        sizeof(connect.vht_capa_mask));
7141
7142         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7143                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7144                         kfree(connkeys);
7145                         return -EINVAL;
7146                 }
7147                 memcpy(&connect.vht_capa,
7148                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7149                        sizeof(connect.vht_capa));
7150         }
7151
7152         wdev_lock(dev->ieee80211_ptr);
7153         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7154         wdev_unlock(dev->ieee80211_ptr);
7155         if (err)
7156                 kfree(connkeys);
7157         return err;
7158 }
7159
7160 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7161 {
7162         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7163         struct net_device *dev = info->user_ptr[1];
7164         u16 reason;
7165         int ret;
7166
7167         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7168                 reason = WLAN_REASON_DEAUTH_LEAVING;
7169         else
7170                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7171
7172         if (reason == 0)
7173                 return -EINVAL;
7174
7175         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7176             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7177                 return -EOPNOTSUPP;
7178
7179         wdev_lock(dev->ieee80211_ptr);
7180         ret = cfg80211_disconnect(rdev, dev, reason, true);
7181         wdev_unlock(dev->ieee80211_ptr);
7182         return ret;
7183 }
7184
7185 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7186 {
7187         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7188         struct net *net;
7189         int err;
7190         u32 pid;
7191
7192         if (!info->attrs[NL80211_ATTR_PID])
7193                 return -EINVAL;
7194
7195         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7196
7197         net = get_net_ns_by_pid(pid);
7198         if (IS_ERR(net))
7199                 return PTR_ERR(net);
7200
7201         err = 0;
7202
7203         /* check if anything to do */
7204         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7205                 err = cfg80211_switch_netns(rdev, net);
7206
7207         put_net(net);
7208         return err;
7209 }
7210
7211 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7212 {
7213         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7214         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7215                         struct cfg80211_pmksa *pmksa) = NULL;
7216         struct net_device *dev = info->user_ptr[1];
7217         struct cfg80211_pmksa pmksa;
7218
7219         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7220
7221         if (!info->attrs[NL80211_ATTR_MAC])
7222                 return -EINVAL;
7223
7224         if (!info->attrs[NL80211_ATTR_PMKID])
7225                 return -EINVAL;
7226
7227         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7228         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7229
7230         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7231             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7232                 return -EOPNOTSUPP;
7233
7234         switch (info->genlhdr->cmd) {
7235         case NL80211_CMD_SET_PMKSA:
7236                 rdev_ops = rdev->ops->set_pmksa;
7237                 break;
7238         case NL80211_CMD_DEL_PMKSA:
7239                 rdev_ops = rdev->ops->del_pmksa;
7240                 break;
7241         default:
7242                 WARN_ON(1);
7243                 break;
7244         }
7245
7246         if (!rdev_ops)
7247                 return -EOPNOTSUPP;
7248
7249         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7250 }
7251
7252 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7253 {
7254         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7255         struct net_device *dev = info->user_ptr[1];
7256
7257         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7258             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7259                 return -EOPNOTSUPP;
7260
7261         if (!rdev->ops->flush_pmksa)
7262                 return -EOPNOTSUPP;
7263
7264         return rdev_flush_pmksa(rdev, dev);
7265 }
7266
7267 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7268 {
7269         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7270         struct net_device *dev = info->user_ptr[1];
7271         u8 action_code, dialog_token;
7272         u16 status_code;
7273         u8 *peer;
7274
7275         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7276             !rdev->ops->tdls_mgmt)
7277                 return -EOPNOTSUPP;
7278
7279         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7280             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7281             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7282             !info->attrs[NL80211_ATTR_IE] ||
7283             !info->attrs[NL80211_ATTR_MAC])
7284                 return -EINVAL;
7285
7286         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7287         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7288         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7289         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7290
7291         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7292                               dialog_token, status_code,
7293                               nla_data(info->attrs[NL80211_ATTR_IE]),
7294                               nla_len(info->attrs[NL80211_ATTR_IE]));
7295 }
7296
7297 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7298 {
7299         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7300         struct net_device *dev = info->user_ptr[1];
7301         enum nl80211_tdls_operation operation;
7302         u8 *peer;
7303
7304         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7305             !rdev->ops->tdls_oper)
7306                 return -EOPNOTSUPP;
7307
7308         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7309             !info->attrs[NL80211_ATTR_MAC])
7310                 return -EINVAL;
7311
7312         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7313         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7314
7315         return rdev_tdls_oper(rdev, dev, peer, operation);
7316 }
7317
7318 static int nl80211_remain_on_channel(struct sk_buff *skb,
7319                                      struct genl_info *info)
7320 {
7321         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7322         struct wireless_dev *wdev = info->user_ptr[1];
7323         struct cfg80211_chan_def chandef;
7324         struct sk_buff *msg;
7325         void *hdr;
7326         u64 cookie;
7327         u32 duration;
7328         int err;
7329
7330         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7331             !info->attrs[NL80211_ATTR_DURATION])
7332                 return -EINVAL;
7333
7334         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7335
7336         if (!rdev->ops->remain_on_channel ||
7337             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7338                 return -EOPNOTSUPP;
7339
7340         /*
7341          * We should be on that channel for at least a minimum amount of
7342          * time (10ms) but no longer than the driver supports.
7343          */
7344         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7345             duration > rdev->wiphy.max_remain_on_channel_duration)
7346                 return -EINVAL;
7347
7348         err = nl80211_parse_chandef(rdev, info, &chandef);
7349         if (err)
7350                 return err;
7351
7352         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7353         if (!msg)
7354                 return -ENOMEM;
7355
7356         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7357                              NL80211_CMD_REMAIN_ON_CHANNEL);
7358         if (!hdr) {
7359                 err = -ENOBUFS;
7360                 goto free_msg;
7361         }
7362
7363         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7364                                      duration, &cookie);
7365
7366         if (err)
7367                 goto free_msg;
7368
7369         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7370                 goto nla_put_failure;
7371
7372         genlmsg_end(msg, hdr);
7373
7374         return genlmsg_reply(msg, info);
7375
7376  nla_put_failure:
7377         err = -ENOBUFS;
7378  free_msg:
7379         nlmsg_free(msg);
7380         return err;
7381 }
7382
7383 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7384                                             struct genl_info *info)
7385 {
7386         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7387         struct wireless_dev *wdev = info->user_ptr[1];
7388         u64 cookie;
7389
7390         if (!info->attrs[NL80211_ATTR_COOKIE])
7391                 return -EINVAL;
7392
7393         if (!rdev->ops->cancel_remain_on_channel)
7394                 return -EOPNOTSUPP;
7395
7396         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7397
7398         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7399 }
7400
7401 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7402                            u8 *rates, u8 rates_len)
7403 {
7404         u8 i;
7405         u32 mask = 0;
7406
7407         for (i = 0; i < rates_len; i++) {
7408                 int rate = (rates[i] & 0x7f) * 5;
7409                 int ridx;
7410                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7411                         struct ieee80211_rate *srate =
7412                                 &sband->bitrates[ridx];
7413                         if (rate == srate->bitrate) {
7414                                 mask |= 1 << ridx;
7415                                 break;
7416                         }
7417                 }
7418                 if (ridx == sband->n_bitrates)
7419                         return 0; /* rate not found */
7420         }
7421
7422         return mask;
7423 }
7424
7425 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7426                                u8 *rates, u8 rates_len,
7427                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7428 {
7429         u8 i;
7430
7431         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7432
7433         for (i = 0; i < rates_len; i++) {
7434                 int ridx, rbit;
7435
7436                 ridx = rates[i] / 8;
7437                 rbit = BIT(rates[i] % 8);
7438
7439                 /* check validity */
7440                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7441                         return false;
7442
7443                 /* check availability */
7444                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7445                         mcs[ridx] |= rbit;
7446                 else
7447                         return false;
7448         }
7449
7450         return true;
7451 }
7452
7453 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
7454 {
7455         u16 mcs_mask = 0;
7456
7457         switch (vht_mcs_map) {
7458         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
7459                 break;
7460         case IEEE80211_VHT_MCS_SUPPORT_0_7:
7461                 mcs_mask = 0x00FF;
7462                 break;
7463         case IEEE80211_VHT_MCS_SUPPORT_0_8:
7464                 mcs_mask = 0x01FF;
7465                 break;
7466         case IEEE80211_VHT_MCS_SUPPORT_0_9:
7467                 mcs_mask = 0x03FF;
7468                 break;
7469         default:
7470                 break;
7471         }
7472
7473         return mcs_mask;
7474 }
7475
7476 static void vht_build_mcs_mask(u16 vht_mcs_map,
7477                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
7478 {
7479         u8 nss;
7480
7481         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
7482                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
7483                 vht_mcs_map >>= 2;
7484         }
7485 }
7486
7487 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
7488                              struct nl80211_txrate_vht *txrate,
7489                              u16 mcs[NL80211_VHT_NSS_MAX])
7490 {
7491         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7492         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
7493         u8 i;
7494
7495         if (!sband->vht_cap.vht_supported)
7496                 return false;
7497
7498         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
7499
7500         /* Build vht_mcs_mask from VHT capabilities */
7501         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
7502
7503         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
7504                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
7505                         mcs[i] = txrate->mcs[i];
7506                 else
7507                         return false;
7508         }
7509
7510         return true;
7511 }
7512
7513 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7514         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7515                                     .len = NL80211_MAX_SUPP_RATES },
7516         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
7517                                 .len = NL80211_MAX_SUPP_HT_RATES },
7518         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
7519         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
7520 };
7521
7522 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7523                                        struct genl_info *info)
7524 {
7525         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7526         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7527         struct cfg80211_bitrate_mask mask;
7528         int rem, i;
7529         struct net_device *dev = info->user_ptr[1];
7530         struct nlattr *tx_rates;
7531         struct ieee80211_supported_band *sband;
7532         u16 vht_tx_mcs_map;
7533
7534         if (!rdev->ops->set_bitrate_mask)
7535                 return -EOPNOTSUPP;
7536
7537         memset(&mask, 0, sizeof(mask));
7538         /* Default to all rates enabled */
7539         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7540                 sband = rdev->wiphy.bands[i];
7541
7542                 if (!sband)
7543                         continue;
7544
7545                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
7546                 memcpy(mask.control[i].ht_mcs,
7547                        sband->ht_cap.mcs.rx_mask,
7548                        sizeof(mask.control[i].ht_mcs));
7549
7550                 if (!sband->vht_cap.vht_supported)
7551                         continue;
7552
7553                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7554                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
7555         }
7556
7557         /* if no rates are given set it back to the defaults */
7558         if (!info->attrs[NL80211_ATTR_TX_RATES])
7559                 goto out;
7560
7561         /*
7562          * The nested attribute uses enum nl80211_band as the index. This maps
7563          * directly to the enum ieee80211_band values used in cfg80211.
7564          */
7565         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7566         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
7567                 enum ieee80211_band band = nla_type(tx_rates);
7568                 int err;
7569
7570                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7571                         return -EINVAL;
7572                 sband = rdev->wiphy.bands[band];
7573                 if (sband == NULL)
7574                         return -EINVAL;
7575                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7576                                 nla_len(tx_rates), nl80211_txattr_policy);
7577                 if (err)
7578                         return err;
7579                 if (tb[NL80211_TXRATE_LEGACY]) {
7580                         mask.control[band].legacy = rateset_to_mask(
7581                                 sband,
7582                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7583                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7584                         if ((mask.control[band].legacy == 0) &&
7585                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7586                                 return -EINVAL;
7587                 }
7588                 if (tb[NL80211_TXRATE_HT]) {
7589                         if (!ht_rateset_to_mask(
7590                                         sband,
7591                                         nla_data(tb[NL80211_TXRATE_HT]),
7592                                         nla_len(tb[NL80211_TXRATE_HT]),
7593                                         mask.control[band].ht_mcs))
7594                                 return -EINVAL;
7595                 }
7596                 if (tb[NL80211_TXRATE_VHT]) {
7597                         if (!vht_set_mcs_mask(
7598                                         sband,
7599                                         nla_data(tb[NL80211_TXRATE_VHT]),
7600                                         mask.control[band].vht_mcs))
7601                                 return -EINVAL;
7602                 }
7603                 if (tb[NL80211_TXRATE_GI]) {
7604                         mask.control[band].gi =
7605                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
7606                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
7607                                 return -EINVAL;
7608                 }
7609
7610                 if (mask.control[band].legacy == 0) {
7611                         /* don't allow empty legacy rates if HT or VHT
7612                          * are not even supported.
7613                          */
7614                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
7615                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
7616                                 return -EINVAL;
7617
7618                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7619                                 if (mask.control[band].ht_mcs[i])
7620                                         goto out;
7621
7622                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
7623                                 if (mask.control[band].vht_mcs[i])
7624                                         goto out;
7625
7626                         /* legacy and mcs rates may not be both empty */
7627                         return -EINVAL;
7628                 }
7629         }
7630
7631 out:
7632         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7633 }
7634
7635 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7636 {
7637         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7638         struct wireless_dev *wdev = info->user_ptr[1];
7639         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7640
7641         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7642                 return -EINVAL;
7643
7644         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7645                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7646
7647         switch (wdev->iftype) {
7648         case NL80211_IFTYPE_STATION:
7649         case NL80211_IFTYPE_ADHOC:
7650         case NL80211_IFTYPE_P2P_CLIENT:
7651         case NL80211_IFTYPE_AP:
7652         case NL80211_IFTYPE_AP_VLAN:
7653         case NL80211_IFTYPE_MESH_POINT:
7654         case NL80211_IFTYPE_P2P_GO:
7655         case NL80211_IFTYPE_P2P_DEVICE:
7656                 break;
7657         default:
7658                 return -EOPNOTSUPP;
7659         }
7660
7661         /* not much point in registering if we can't reply */
7662         if (!rdev->ops->mgmt_tx)
7663                 return -EOPNOTSUPP;
7664
7665         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7666                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7667                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7668 }
7669
7670 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7671 {
7672         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7673         struct wireless_dev *wdev = info->user_ptr[1];
7674         struct cfg80211_chan_def chandef;
7675         int err;
7676         void *hdr = NULL;
7677         u64 cookie;
7678         struct sk_buff *msg = NULL;
7679         struct cfg80211_mgmt_tx_params params = {
7680                 .dont_wait_for_ack =
7681                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
7682         };
7683
7684         if (!info->attrs[NL80211_ATTR_FRAME])
7685                 return -EINVAL;
7686
7687         if (!rdev->ops->mgmt_tx)
7688                 return -EOPNOTSUPP;
7689
7690         switch (wdev->iftype) {
7691         case NL80211_IFTYPE_P2P_DEVICE:
7692                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7693                         return -EINVAL;
7694         case NL80211_IFTYPE_STATION:
7695         case NL80211_IFTYPE_ADHOC:
7696         case NL80211_IFTYPE_P2P_CLIENT:
7697         case NL80211_IFTYPE_AP:
7698         case NL80211_IFTYPE_AP_VLAN:
7699         case NL80211_IFTYPE_MESH_POINT:
7700         case NL80211_IFTYPE_P2P_GO:
7701                 break;
7702         default:
7703                 return -EOPNOTSUPP;
7704         }
7705
7706         if (info->attrs[NL80211_ATTR_DURATION]) {
7707                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7708                         return -EINVAL;
7709                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7710
7711                 /*
7712                  * We should wait on the channel for at least a minimum amount
7713                  * of time (10ms) but no longer than the driver supports.
7714                  */
7715                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7716                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
7717                         return -EINVAL;
7718
7719         }
7720
7721         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7722
7723         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7724                 return -EINVAL;
7725
7726         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7727
7728         /* get the channel if any has been specified, otherwise pass NULL to
7729          * the driver. The latter will use the current one
7730          */
7731         chandef.chan = NULL;
7732         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7733                 err = nl80211_parse_chandef(rdev, info, &chandef);
7734                 if (err)
7735                         return err;
7736         }
7737
7738         if (!chandef.chan && params.offchan)
7739                 return -EINVAL;
7740
7741         if (!params.dont_wait_for_ack) {
7742                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7743                 if (!msg)
7744                         return -ENOMEM;
7745
7746                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7747                                      NL80211_CMD_FRAME);
7748                 if (!hdr) {
7749                         err = -ENOBUFS;
7750                         goto free_msg;
7751                 }
7752         }
7753
7754         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
7755         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
7756         params.chan = chandef.chan;
7757         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
7758         if (err)
7759                 goto free_msg;
7760
7761         if (msg) {
7762                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7763                         goto nla_put_failure;
7764
7765                 genlmsg_end(msg, hdr);
7766                 return genlmsg_reply(msg, info);
7767         }
7768
7769         return 0;
7770
7771  nla_put_failure:
7772         err = -ENOBUFS;
7773  free_msg:
7774         nlmsg_free(msg);
7775         return err;
7776 }
7777
7778 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7779 {
7780         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7781         struct wireless_dev *wdev = info->user_ptr[1];
7782         u64 cookie;
7783
7784         if (!info->attrs[NL80211_ATTR_COOKIE])
7785                 return -EINVAL;
7786
7787         if (!rdev->ops->mgmt_tx_cancel_wait)
7788                 return -EOPNOTSUPP;
7789
7790         switch (wdev->iftype) {
7791         case NL80211_IFTYPE_STATION:
7792         case NL80211_IFTYPE_ADHOC:
7793         case NL80211_IFTYPE_P2P_CLIENT:
7794         case NL80211_IFTYPE_AP:
7795         case NL80211_IFTYPE_AP_VLAN:
7796         case NL80211_IFTYPE_P2P_GO:
7797         case NL80211_IFTYPE_P2P_DEVICE:
7798                 break;
7799         default:
7800                 return -EOPNOTSUPP;
7801         }
7802
7803         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7804
7805         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7806 }
7807
7808 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7809 {
7810         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7811         struct wireless_dev *wdev;
7812         struct net_device *dev = info->user_ptr[1];
7813         u8 ps_state;
7814         bool state;
7815         int err;
7816
7817         if (!info->attrs[NL80211_ATTR_PS_STATE])
7818                 return -EINVAL;
7819
7820         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7821
7822         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7823                 return -EINVAL;
7824
7825         wdev = dev->ieee80211_ptr;
7826
7827         if (!rdev->ops->set_power_mgmt)
7828                 return -EOPNOTSUPP;
7829
7830         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7831
7832         if (state == wdev->ps)
7833                 return 0;
7834
7835         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7836         if (!err)
7837                 wdev->ps = state;
7838         return err;
7839 }
7840
7841 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7842 {
7843         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7844         enum nl80211_ps_state ps_state;
7845         struct wireless_dev *wdev;
7846         struct net_device *dev = info->user_ptr[1];
7847         struct sk_buff *msg;
7848         void *hdr;
7849         int err;
7850
7851         wdev = dev->ieee80211_ptr;
7852
7853         if (!rdev->ops->set_power_mgmt)
7854                 return -EOPNOTSUPP;
7855
7856         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7857         if (!msg)
7858                 return -ENOMEM;
7859
7860         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7861                              NL80211_CMD_GET_POWER_SAVE);
7862         if (!hdr) {
7863                 err = -ENOBUFS;
7864                 goto free_msg;
7865         }
7866
7867         if (wdev->ps)
7868                 ps_state = NL80211_PS_ENABLED;
7869         else
7870                 ps_state = NL80211_PS_DISABLED;
7871
7872         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7873                 goto nla_put_failure;
7874
7875         genlmsg_end(msg, hdr);
7876         return genlmsg_reply(msg, info);
7877
7878  nla_put_failure:
7879         err = -ENOBUFS;
7880  free_msg:
7881         nlmsg_free(msg);
7882         return err;
7883 }
7884
7885 static const struct nla_policy
7886 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
7887         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7888         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7889         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7890         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7891         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7892         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7893 };
7894
7895 static int nl80211_set_cqm_txe(struct genl_info *info,
7896                                u32 rate, u32 pkts, u32 intvl)
7897 {
7898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7899         struct net_device *dev = info->user_ptr[1];
7900         struct wireless_dev *wdev = dev->ieee80211_ptr;
7901
7902         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7903                 return -EINVAL;
7904
7905         if (!rdev->ops->set_cqm_txe_config)
7906                 return -EOPNOTSUPP;
7907
7908         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7909             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7910                 return -EOPNOTSUPP;
7911
7912         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7913 }
7914
7915 static int nl80211_set_cqm_rssi(struct genl_info *info,
7916                                 s32 threshold, u32 hysteresis)
7917 {
7918         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7919         struct net_device *dev = info->user_ptr[1];
7920         struct wireless_dev *wdev = dev->ieee80211_ptr;
7921
7922         if (threshold > 0)
7923                 return -EINVAL;
7924
7925         /* disabling - hysteresis should also be zero then */
7926         if (threshold == 0)
7927                 hysteresis = 0;
7928
7929         if (!rdev->ops->set_cqm_rssi_config)
7930                 return -EOPNOTSUPP;
7931
7932         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7933             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7934                 return -EOPNOTSUPP;
7935
7936         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7937 }
7938
7939 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7940 {
7941         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7942         struct nlattr *cqm;
7943         int err;
7944
7945         cqm = info->attrs[NL80211_ATTR_CQM];
7946         if (!cqm)
7947                 return -EINVAL;
7948
7949         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7950                                nl80211_attr_cqm_policy);
7951         if (err)
7952                 return err;
7953
7954         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7955             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7956                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7957                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7958
7959                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
7960         }
7961
7962         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7963             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7964             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7965                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7966                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7967                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7968
7969                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
7970         }
7971
7972         return -EINVAL;
7973 }
7974
7975 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7976 {
7977         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7978         struct net_device *dev = info->user_ptr[1];
7979         struct mesh_config cfg;
7980         struct mesh_setup setup;
7981         int err;
7982
7983         /* start with default */
7984         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7985         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7986
7987         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7988                 /* and parse parameters if given */
7989                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7990                 if (err)
7991                         return err;
7992         }
7993
7994         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7995             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7996                 return -EINVAL;
7997
7998         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7999         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8000
8001         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8002             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8003                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8004                         return -EINVAL;
8005
8006         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8007                 setup.beacon_interval =
8008                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8009                 if (setup.beacon_interval < 10 ||
8010                     setup.beacon_interval > 10000)
8011                         return -EINVAL;
8012         }
8013
8014         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8015                 setup.dtim_period =
8016                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8017                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8018                         return -EINVAL;
8019         }
8020
8021         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8022                 /* parse additional setup parameters if given */
8023                 err = nl80211_parse_mesh_setup(info, &setup);
8024                 if (err)
8025                         return err;
8026         }
8027
8028         if (setup.user_mpm)
8029                 cfg.auto_open_plinks = false;
8030
8031         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8032                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8033                 if (err)
8034                         return err;
8035         } else {
8036                 /* cfg80211_join_mesh() will sort it out */
8037                 setup.chandef.chan = NULL;
8038         }
8039
8040         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8041                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8042                 int n_rates =
8043                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8044                 struct ieee80211_supported_band *sband;
8045
8046                 if (!setup.chandef.chan)
8047                         return -EINVAL;
8048
8049                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8050
8051                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8052                                              &setup.basic_rates);
8053                 if (err)
8054                         return err;
8055         }
8056
8057         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8058 }
8059
8060 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8061 {
8062         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8063         struct net_device *dev = info->user_ptr[1];
8064
8065         return cfg80211_leave_mesh(rdev, dev);
8066 }
8067
8068 #ifdef CONFIG_PM
8069 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8070                                         struct cfg80211_registered_device *rdev)
8071 {
8072         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8073         struct nlattr *nl_pats, *nl_pat;
8074         int i, pat_len;
8075
8076         if (!wowlan->n_patterns)
8077                 return 0;
8078
8079         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8080         if (!nl_pats)
8081                 return -ENOBUFS;
8082
8083         for (i = 0; i < wowlan->n_patterns; i++) {
8084                 nl_pat = nla_nest_start(msg, i + 1);
8085                 if (!nl_pat)
8086                         return -ENOBUFS;
8087                 pat_len = wowlan->patterns[i].pattern_len;
8088                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8089                             wowlan->patterns[i].mask) ||
8090                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8091                             wowlan->patterns[i].pattern) ||
8092                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8093                                 wowlan->patterns[i].pkt_offset))
8094                         return -ENOBUFS;
8095                 nla_nest_end(msg, nl_pat);
8096         }
8097         nla_nest_end(msg, nl_pats);
8098
8099         return 0;
8100 }
8101
8102 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8103                                    struct cfg80211_wowlan_tcp *tcp)
8104 {
8105         struct nlattr *nl_tcp;
8106
8107         if (!tcp)
8108                 return 0;
8109
8110         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8111         if (!nl_tcp)
8112                 return -ENOBUFS;
8113
8114         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8115             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8116             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8117             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8118             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8119             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8120                     tcp->payload_len, tcp->payload) ||
8121             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8122                         tcp->data_interval) ||
8123             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8124                     tcp->wake_len, tcp->wake_data) ||
8125             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8126                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8127                 return -ENOBUFS;
8128
8129         if (tcp->payload_seq.len &&
8130             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8131                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8132                 return -ENOBUFS;
8133
8134         if (tcp->payload_tok.len &&
8135             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8136                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8137                     &tcp->payload_tok))
8138                 return -ENOBUFS;
8139
8140         nla_nest_end(msg, nl_tcp);
8141
8142         return 0;
8143 }
8144
8145 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
8146 {
8147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8148         struct sk_buff *msg;
8149         void *hdr;
8150         u32 size = NLMSG_DEFAULT_SIZE;
8151
8152         if (!rdev->wiphy.wowlan)
8153                 return -EOPNOTSUPP;
8154
8155         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
8156                 /* adjust size to have room for all the data */
8157                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
8158                         rdev->wiphy.wowlan_config->tcp->payload_len +
8159                         rdev->wiphy.wowlan_config->tcp->wake_len +
8160                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
8161         }
8162
8163         msg = nlmsg_new(size, GFP_KERNEL);
8164         if (!msg)
8165                 return -ENOMEM;
8166
8167         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8168                              NL80211_CMD_GET_WOWLAN);
8169         if (!hdr)
8170                 goto nla_put_failure;
8171
8172         if (rdev->wiphy.wowlan_config) {
8173                 struct nlattr *nl_wowlan;
8174
8175                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
8176                 if (!nl_wowlan)
8177                         goto nla_put_failure;
8178
8179                 if ((rdev->wiphy.wowlan_config->any &&
8180                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
8181                     (rdev->wiphy.wowlan_config->disconnect &&
8182                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
8183                     (rdev->wiphy.wowlan_config->magic_pkt &&
8184                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
8185                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
8186                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
8187                     (rdev->wiphy.wowlan_config->eap_identity_req &&
8188                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
8189                     (rdev->wiphy.wowlan_config->four_way_handshake &&
8190                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
8191                     (rdev->wiphy.wowlan_config->rfkill_release &&
8192                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
8193                         goto nla_put_failure;
8194
8195                 if (nl80211_send_wowlan_patterns(msg, rdev))
8196                         goto nla_put_failure;
8197
8198                 if (nl80211_send_wowlan_tcp(msg,
8199                                             rdev->wiphy.wowlan_config->tcp))
8200                         goto nla_put_failure;
8201
8202                 nla_nest_end(msg, nl_wowlan);
8203         }
8204
8205         genlmsg_end(msg, hdr);
8206         return genlmsg_reply(msg, info);
8207
8208 nla_put_failure:
8209         nlmsg_free(msg);
8210         return -ENOBUFS;
8211 }
8212
8213 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8214                                     struct nlattr *attr,
8215                                     struct cfg80211_wowlan *trig)
8216 {
8217         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8218         struct cfg80211_wowlan_tcp *cfg;
8219         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8220         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8221         u32 size;
8222         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8223         int err, port;
8224
8225         if (!rdev->wiphy.wowlan->tcp)
8226                 return -EINVAL;
8227
8228         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8229                         nla_data(attr), nla_len(attr),
8230                         nl80211_wowlan_tcp_policy);
8231         if (err)
8232                 return err;
8233
8234         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8235             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8236             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8237             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8238             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8239             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8240             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8241             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8242                 return -EINVAL;
8243
8244         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8245         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8246                 return -EINVAL;
8247
8248         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8249                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8250             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8251                 return -EINVAL;
8252
8253         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8254         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8255                 return -EINVAL;
8256
8257         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8258         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8259                 return -EINVAL;
8260
8261         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8262                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8263
8264                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8265                 tokens_size = tokln - sizeof(*tok);
8266
8267                 if (!tok->len || tokens_size % tok->len)
8268                         return -EINVAL;
8269                 if (!rdev->wiphy.wowlan->tcp->tok)
8270                         return -EINVAL;
8271                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8272                         return -EINVAL;
8273                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8274                         return -EINVAL;
8275                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8276                         return -EINVAL;
8277                 if (tok->offset + tok->len > data_size)
8278                         return -EINVAL;
8279         }
8280
8281         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8282                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8283                 if (!rdev->wiphy.wowlan->tcp->seq)
8284                         return -EINVAL;
8285                 if (seq->len == 0 || seq->len > 4)
8286                         return -EINVAL;
8287                 if (seq->len + seq->offset > data_size)
8288                         return -EINVAL;
8289         }
8290
8291         size = sizeof(*cfg);
8292         size += data_size;
8293         size += wake_size + wake_mask_size;
8294         size += tokens_size;
8295
8296         cfg = kzalloc(size, GFP_KERNEL);
8297         if (!cfg)
8298                 return -ENOMEM;
8299         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8300         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8301         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8302                ETH_ALEN);
8303         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8304                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8305         else
8306                 port = 0;
8307 #ifdef CONFIG_INET
8308         /* allocate a socket and port for it and use it */
8309         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8310                             IPPROTO_TCP, &cfg->sock, 1);
8311         if (err) {
8312                 kfree(cfg);
8313                 return err;
8314         }
8315         if (inet_csk_get_port(cfg->sock->sk, port)) {
8316                 sock_release(cfg->sock);
8317                 kfree(cfg);
8318                 return -EADDRINUSE;
8319         }
8320         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8321 #else
8322         if (!port) {
8323                 kfree(cfg);
8324                 return -EINVAL;
8325         }
8326         cfg->src_port = port;
8327 #endif
8328
8329         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8330         cfg->payload_len = data_size;
8331         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8332         memcpy((void *)cfg->payload,
8333                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8334                data_size);
8335         if (seq)
8336                 cfg->payload_seq = *seq;
8337         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8338         cfg->wake_len = wake_size;
8339         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8340         memcpy((void *)cfg->wake_data,
8341                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8342                wake_size);
8343         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8344                          data_size + wake_size;
8345         memcpy((void *)cfg->wake_mask,
8346                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8347                wake_mask_size);
8348         if (tok) {
8349                 cfg->tokens_size = tokens_size;
8350                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8351         }
8352
8353         trig->tcp = cfg;
8354
8355         return 0;
8356 }
8357
8358 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8359 {
8360         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8361         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8362         struct cfg80211_wowlan new_triggers = {};
8363         struct cfg80211_wowlan *ntrig;
8364         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8365         int err, i;
8366         bool prev_enabled = rdev->wiphy.wowlan_config;
8367
8368         if (!wowlan)
8369                 return -EOPNOTSUPP;
8370
8371         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8372                 cfg80211_rdev_free_wowlan(rdev);
8373                 rdev->wiphy.wowlan_config = NULL;
8374                 goto set_wakeup;
8375         }
8376
8377         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8378                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8379                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8380                         nl80211_wowlan_policy);
8381         if (err)
8382                 return err;
8383
8384         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8385                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8386                         return -EINVAL;
8387                 new_triggers.any = true;
8388         }
8389
8390         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8391                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8392                         return -EINVAL;
8393                 new_triggers.disconnect = true;
8394         }
8395
8396         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8397                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8398                         return -EINVAL;
8399                 new_triggers.magic_pkt = true;
8400         }
8401
8402         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8403                 return -EINVAL;
8404
8405         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8406                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8407                         return -EINVAL;
8408                 new_triggers.gtk_rekey_failure = true;
8409         }
8410
8411         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8412                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8413                         return -EINVAL;
8414                 new_triggers.eap_identity_req = true;
8415         }
8416
8417         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8418                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8419                         return -EINVAL;
8420                 new_triggers.four_way_handshake = true;
8421         }
8422
8423         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8424                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8425                         return -EINVAL;
8426                 new_triggers.rfkill_release = true;
8427         }
8428
8429         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8430                 struct nlattr *pat;
8431                 int n_patterns = 0;
8432                 int rem, pat_len, mask_len, pkt_offset;
8433                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8434
8435                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8436                                     rem)
8437                         n_patterns++;
8438                 if (n_patterns > wowlan->n_patterns)
8439                         return -EINVAL;
8440
8441                 new_triggers.patterns = kcalloc(n_patterns,
8442                                                 sizeof(new_triggers.patterns[0]),
8443                                                 GFP_KERNEL);
8444                 if (!new_triggers.patterns)
8445                         return -ENOMEM;
8446
8447                 new_triggers.n_patterns = n_patterns;
8448                 i = 0;
8449
8450                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8451                                     rem) {
8452                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8453                                   nla_len(pat), NULL);
8454                         err = -EINVAL;
8455                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8456                             !pat_tb[NL80211_PKTPAT_PATTERN])
8457                                 goto error;
8458                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8459                         mask_len = DIV_ROUND_UP(pat_len, 8);
8460                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8461                                 goto error;
8462                         if (pat_len > wowlan->pattern_max_len ||
8463                             pat_len < wowlan->pattern_min_len)
8464                                 goto error;
8465
8466                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8467                                 pkt_offset = 0;
8468                         else
8469                                 pkt_offset = nla_get_u32(
8470                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8471                         if (pkt_offset > wowlan->max_pkt_offset)
8472                                 goto error;
8473                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8474
8475                         new_triggers.patterns[i].mask =
8476                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
8477                         if (!new_triggers.patterns[i].mask) {
8478                                 err = -ENOMEM;
8479                                 goto error;
8480                         }
8481                         new_triggers.patterns[i].pattern =
8482                                 new_triggers.patterns[i].mask + mask_len;
8483                         memcpy(new_triggers.patterns[i].mask,
8484                                nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8485                                mask_len);
8486                         new_triggers.patterns[i].pattern_len = pat_len;
8487                         memcpy(new_triggers.patterns[i].pattern,
8488                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8489                                pat_len);
8490                         i++;
8491                 }
8492         }
8493
8494         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8495                 err = nl80211_parse_wowlan_tcp(
8496                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8497                         &new_triggers);
8498                 if (err)
8499                         goto error;
8500         }
8501
8502         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8503         if (!ntrig) {
8504                 err = -ENOMEM;
8505                 goto error;
8506         }
8507         cfg80211_rdev_free_wowlan(rdev);
8508         rdev->wiphy.wowlan_config = ntrig;
8509
8510  set_wakeup:
8511         if (rdev->ops->set_wakeup &&
8512             prev_enabled != !!rdev->wiphy.wowlan_config)
8513                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8514
8515         return 0;
8516  error:
8517         for (i = 0; i < new_triggers.n_patterns; i++)
8518                 kfree(new_triggers.patterns[i].mask);
8519         kfree(new_triggers.patterns);
8520         if (new_triggers.tcp && new_triggers.tcp->sock)
8521                 sock_release(new_triggers.tcp->sock);
8522         kfree(new_triggers.tcp);
8523         return err;
8524 }
8525 #endif
8526
8527 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8528                                        struct cfg80211_registered_device *rdev)
8529 {
8530         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8531         int i, j, pat_len;
8532         struct cfg80211_coalesce_rules *rule;
8533
8534         if (!rdev->coalesce->n_rules)
8535                 return 0;
8536
8537         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8538         if (!nl_rules)
8539                 return -ENOBUFS;
8540
8541         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8542                 nl_rule = nla_nest_start(msg, i + 1);
8543                 if (!nl_rule)
8544                         return -ENOBUFS;
8545
8546                 rule = &rdev->coalesce->rules[i];
8547                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8548                                 rule->delay))
8549                         return -ENOBUFS;
8550
8551                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8552                                 rule->condition))
8553                         return -ENOBUFS;
8554
8555                 nl_pats = nla_nest_start(msg,
8556                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8557                 if (!nl_pats)
8558                         return -ENOBUFS;
8559
8560                 for (j = 0; j < rule->n_patterns; j++) {
8561                         nl_pat = nla_nest_start(msg, j + 1);
8562                         if (!nl_pat)
8563                                 return -ENOBUFS;
8564                         pat_len = rule->patterns[j].pattern_len;
8565                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8566                                     DIV_ROUND_UP(pat_len, 8),
8567                                     rule->patterns[j].mask) ||
8568                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8569                                     rule->patterns[j].pattern) ||
8570                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8571                                         rule->patterns[j].pkt_offset))
8572                                 return -ENOBUFS;
8573                         nla_nest_end(msg, nl_pat);
8574                 }
8575                 nla_nest_end(msg, nl_pats);
8576                 nla_nest_end(msg, nl_rule);
8577         }
8578         nla_nest_end(msg, nl_rules);
8579
8580         return 0;
8581 }
8582
8583 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8584 {
8585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8586         struct sk_buff *msg;
8587         void *hdr;
8588
8589         if (!rdev->wiphy.coalesce)
8590                 return -EOPNOTSUPP;
8591
8592         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8593         if (!msg)
8594                 return -ENOMEM;
8595
8596         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8597                              NL80211_CMD_GET_COALESCE);
8598         if (!hdr)
8599                 goto nla_put_failure;
8600
8601         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8602                 goto nla_put_failure;
8603
8604         genlmsg_end(msg, hdr);
8605         return genlmsg_reply(msg, info);
8606
8607 nla_put_failure:
8608         nlmsg_free(msg);
8609         return -ENOBUFS;
8610 }
8611
8612 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8613 {
8614         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8615         int i, j;
8616         struct cfg80211_coalesce_rules *rule;
8617
8618         if (!coalesce)
8619                 return;
8620
8621         for (i = 0; i < coalesce->n_rules; i++) {
8622                 rule = &coalesce->rules[i];
8623                 for (j = 0; j < rule->n_patterns; j++)
8624                         kfree(rule->patterns[j].mask);
8625                 kfree(rule->patterns);
8626         }
8627         kfree(coalesce->rules);
8628         kfree(coalesce);
8629         rdev->coalesce = NULL;
8630 }
8631
8632 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8633                                        struct nlattr *rule,
8634                                        struct cfg80211_coalesce_rules *new_rule)
8635 {
8636         int err, i;
8637         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8638         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8639         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8640         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8641
8642         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8643                         nla_len(rule), nl80211_coalesce_policy);
8644         if (err)
8645                 return err;
8646
8647         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8648                 new_rule->delay =
8649                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8650         if (new_rule->delay > coalesce->max_delay)
8651                 return -EINVAL;
8652
8653         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8654                 new_rule->condition =
8655                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8656         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8657             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8658                 return -EINVAL;
8659
8660         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8661                 return -EINVAL;
8662
8663         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8664                             rem)
8665                 n_patterns++;
8666         if (n_patterns > coalesce->n_patterns)
8667                 return -EINVAL;
8668
8669         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8670                                      GFP_KERNEL);
8671         if (!new_rule->patterns)
8672                 return -ENOMEM;
8673
8674         new_rule->n_patterns = n_patterns;
8675         i = 0;
8676
8677         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8678                             rem) {
8679                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8680                           nla_len(pat), NULL);
8681                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8682                     !pat_tb[NL80211_PKTPAT_PATTERN])
8683                         return -EINVAL;
8684                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8685                 mask_len = DIV_ROUND_UP(pat_len, 8);
8686                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8687                         return -EINVAL;
8688                 if (pat_len > coalesce->pattern_max_len ||
8689                     pat_len < coalesce->pattern_min_len)
8690                         return -EINVAL;
8691
8692                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8693                         pkt_offset = 0;
8694                 else
8695                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8696                 if (pkt_offset > coalesce->max_pkt_offset)
8697                         return -EINVAL;
8698                 new_rule->patterns[i].pkt_offset = pkt_offset;
8699
8700                 new_rule->patterns[i].mask =
8701                         kmalloc(mask_len + pat_len, GFP_KERNEL);
8702                 if (!new_rule->patterns[i].mask)
8703                         return -ENOMEM;
8704                 new_rule->patterns[i].pattern =
8705                         new_rule->patterns[i].mask + mask_len;
8706                 memcpy(new_rule->patterns[i].mask,
8707                        nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
8708                 new_rule->patterns[i].pattern_len = pat_len;
8709                 memcpy(new_rule->patterns[i].pattern,
8710                        nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
8711                 i++;
8712         }
8713
8714         return 0;
8715 }
8716
8717 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8718 {
8719         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8720         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8721         struct cfg80211_coalesce new_coalesce = {};
8722         struct cfg80211_coalesce *n_coalesce;
8723         int err, rem_rule, n_rules = 0, i, j;
8724         struct nlattr *rule;
8725         struct cfg80211_coalesce_rules *tmp_rule;
8726
8727         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8728                 return -EOPNOTSUPP;
8729
8730         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8731                 cfg80211_rdev_free_coalesce(rdev);
8732                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8733                 return 0;
8734         }
8735
8736         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8737                             rem_rule)
8738                 n_rules++;
8739         if (n_rules > coalesce->n_rules)
8740                 return -EINVAL;
8741
8742         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8743                                      GFP_KERNEL);
8744         if (!new_coalesce.rules)
8745                 return -ENOMEM;
8746
8747         new_coalesce.n_rules = n_rules;
8748         i = 0;
8749
8750         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8751                             rem_rule) {
8752                 err = nl80211_parse_coalesce_rule(rdev, rule,
8753                                                   &new_coalesce.rules[i]);
8754                 if (err)
8755                         goto error;
8756
8757                 i++;
8758         }
8759
8760         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8761         if (err)
8762                 goto error;
8763
8764         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8765         if (!n_coalesce) {
8766                 err = -ENOMEM;
8767                 goto error;
8768         }
8769         cfg80211_rdev_free_coalesce(rdev);
8770         rdev->coalesce = n_coalesce;
8771
8772         return 0;
8773 error:
8774         for (i = 0; i < new_coalesce.n_rules; i++) {
8775                 tmp_rule = &new_coalesce.rules[i];
8776                 for (j = 0; j < tmp_rule->n_patterns; j++)
8777                         kfree(tmp_rule->patterns[j].mask);
8778                 kfree(tmp_rule->patterns);
8779         }
8780         kfree(new_coalesce.rules);
8781
8782         return err;
8783 }
8784
8785 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8786 {
8787         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8788         struct net_device *dev = info->user_ptr[1];
8789         struct wireless_dev *wdev = dev->ieee80211_ptr;
8790         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8791         struct cfg80211_gtk_rekey_data rekey_data;
8792         int err;
8793
8794         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8795                 return -EINVAL;
8796
8797         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8798                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8799                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8800                         nl80211_rekey_policy);
8801         if (err)
8802                 return err;
8803
8804         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8805                 return -ERANGE;
8806         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8807                 return -ERANGE;
8808         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8809                 return -ERANGE;
8810
8811         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8812                NL80211_KEK_LEN);
8813         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8814                NL80211_KCK_LEN);
8815         memcpy(rekey_data.replay_ctr,
8816                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8817                NL80211_REPLAY_CTR_LEN);
8818
8819         wdev_lock(wdev);
8820         if (!wdev->current_bss) {
8821                 err = -ENOTCONN;
8822                 goto out;
8823         }
8824
8825         if (!rdev->ops->set_rekey_data) {
8826                 err = -EOPNOTSUPP;
8827                 goto out;
8828         }
8829
8830         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8831  out:
8832         wdev_unlock(wdev);
8833         return err;
8834 }
8835
8836 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8837                                              struct genl_info *info)
8838 {
8839         struct net_device *dev = info->user_ptr[1];
8840         struct wireless_dev *wdev = dev->ieee80211_ptr;
8841
8842         if (wdev->iftype != NL80211_IFTYPE_AP &&
8843             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8844                 return -EINVAL;
8845
8846         if (wdev->ap_unexpected_nlportid)
8847                 return -EBUSY;
8848
8849         wdev->ap_unexpected_nlportid = info->snd_portid;
8850         return 0;
8851 }
8852
8853 static int nl80211_probe_client(struct sk_buff *skb,
8854                                 struct genl_info *info)
8855 {
8856         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8857         struct net_device *dev = info->user_ptr[1];
8858         struct wireless_dev *wdev = dev->ieee80211_ptr;
8859         struct sk_buff *msg;
8860         void *hdr;
8861         const u8 *addr;
8862         u64 cookie;
8863         int err;
8864
8865         if (wdev->iftype != NL80211_IFTYPE_AP &&
8866             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8867                 return -EOPNOTSUPP;
8868
8869         if (!info->attrs[NL80211_ATTR_MAC])
8870                 return -EINVAL;
8871
8872         if (!rdev->ops->probe_client)
8873                 return -EOPNOTSUPP;
8874
8875         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8876         if (!msg)
8877                 return -ENOMEM;
8878
8879         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8880                              NL80211_CMD_PROBE_CLIENT);
8881         if (!hdr) {
8882                 err = -ENOBUFS;
8883                 goto free_msg;
8884         }
8885
8886         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8887
8888         err = rdev_probe_client(rdev, dev, addr, &cookie);
8889         if (err)
8890                 goto free_msg;
8891
8892         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8893                 goto nla_put_failure;
8894
8895         genlmsg_end(msg, hdr);
8896
8897         return genlmsg_reply(msg, info);
8898
8899  nla_put_failure:
8900         err = -ENOBUFS;
8901  free_msg:
8902         nlmsg_free(msg);
8903         return err;
8904 }
8905
8906 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8907 {
8908         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8909         struct cfg80211_beacon_registration *reg, *nreg;
8910         int rv;
8911
8912         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8913                 return -EOPNOTSUPP;
8914
8915         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8916         if (!nreg)
8917                 return -ENOMEM;
8918
8919         /* First, check if already registered. */
8920         spin_lock_bh(&rdev->beacon_registrations_lock);
8921         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8922                 if (reg->nlportid == info->snd_portid) {
8923                         rv = -EALREADY;
8924                         goto out_err;
8925                 }
8926         }
8927         /* Add it to the list */
8928         nreg->nlportid = info->snd_portid;
8929         list_add(&nreg->list, &rdev->beacon_registrations);
8930
8931         spin_unlock_bh(&rdev->beacon_registrations_lock);
8932
8933         return 0;
8934 out_err:
8935         spin_unlock_bh(&rdev->beacon_registrations_lock);
8936         kfree(nreg);
8937         return rv;
8938 }
8939
8940 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8941 {
8942         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8943         struct wireless_dev *wdev = info->user_ptr[1];
8944         int err;
8945
8946         if (!rdev->ops->start_p2p_device)
8947                 return -EOPNOTSUPP;
8948
8949         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8950                 return -EOPNOTSUPP;
8951
8952         if (wdev->p2p_started)
8953                 return 0;
8954
8955         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8956         if (err)
8957                 return err;
8958
8959         err = rdev_start_p2p_device(rdev, wdev);
8960         if (err)
8961                 return err;
8962
8963         wdev->p2p_started = true;
8964         rdev->opencount++;
8965
8966         return 0;
8967 }
8968
8969 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8970 {
8971         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8972         struct wireless_dev *wdev = info->user_ptr[1];
8973
8974         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8975                 return -EOPNOTSUPP;
8976
8977         if (!rdev->ops->stop_p2p_device)
8978                 return -EOPNOTSUPP;
8979
8980         cfg80211_stop_p2p_device(rdev, wdev);
8981
8982         return 0;
8983 }
8984
8985 static int nl80211_get_protocol_features(struct sk_buff *skb,
8986                                          struct genl_info *info)
8987 {
8988         void *hdr;
8989         struct sk_buff *msg;
8990
8991         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8992         if (!msg)
8993                 return -ENOMEM;
8994
8995         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8996                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8997         if (!hdr)
8998                 goto nla_put_failure;
8999
9000         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9001                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9002                 goto nla_put_failure;
9003
9004         genlmsg_end(msg, hdr);
9005         return genlmsg_reply(msg, info);
9006
9007  nla_put_failure:
9008         kfree_skb(msg);
9009         return -ENOBUFS;
9010 }
9011
9012 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9013 {
9014         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9015         struct cfg80211_update_ft_ies_params ft_params;
9016         struct net_device *dev = info->user_ptr[1];
9017
9018         if (!rdev->ops->update_ft_ies)
9019                 return -EOPNOTSUPP;
9020
9021         if (!info->attrs[NL80211_ATTR_MDID] ||
9022             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9023                 return -EINVAL;
9024
9025         memset(&ft_params, 0, sizeof(ft_params));
9026         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
9027         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9028         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9029
9030         return rdev_update_ft_ies(rdev, dev, &ft_params);
9031 }
9032
9033 static int nl80211_crit_protocol_start(struct sk_buff *skb,
9034                                        struct genl_info *info)
9035 {
9036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9037         struct wireless_dev *wdev = info->user_ptr[1];
9038         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
9039         u16 duration;
9040         int ret;
9041
9042         if (!rdev->ops->crit_proto_start)
9043                 return -EOPNOTSUPP;
9044
9045         if (WARN_ON(!rdev->ops->crit_proto_stop))
9046                 return -EINVAL;
9047
9048         if (rdev->crit_proto_nlportid)
9049                 return -EBUSY;
9050
9051         /* determine protocol if provided */
9052         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
9053                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
9054
9055         if (proto >= NUM_NL80211_CRIT_PROTO)
9056                 return -EINVAL;
9057
9058         /* timeout must be provided */
9059         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
9060                 return -EINVAL;
9061
9062         duration =
9063                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
9064
9065         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
9066                 return -ERANGE;
9067
9068         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
9069         if (!ret)
9070                 rdev->crit_proto_nlportid = info->snd_portid;
9071
9072         return ret;
9073 }
9074
9075 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
9076                                       struct genl_info *info)
9077 {
9078         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9079         struct wireless_dev *wdev = info->user_ptr[1];
9080
9081         if (!rdev->ops->crit_proto_stop)
9082                 return -EOPNOTSUPP;
9083
9084         if (rdev->crit_proto_nlportid) {
9085                 rdev->crit_proto_nlportid = 0;
9086                 rdev_crit_proto_stop(rdev, wdev);
9087         }
9088         return 0;
9089 }
9090
9091 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
9092 {
9093         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9094         struct wireless_dev *wdev =
9095                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
9096         int i, err;
9097         u32 vid, subcmd;
9098
9099         if (!rdev->wiphy.vendor_commands)
9100                 return -EOPNOTSUPP;
9101
9102         if (IS_ERR(wdev)) {
9103                 err = PTR_ERR(wdev);
9104                 if (err != -EINVAL)
9105                         return err;
9106                 wdev = NULL;
9107         } else if (wdev->wiphy != &rdev->wiphy) {
9108                 return -EINVAL;
9109         }
9110
9111         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
9112             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
9113                 return -EINVAL;
9114
9115         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
9116         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
9117         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
9118                 const struct wiphy_vendor_command *vcmd;
9119                 void *data = NULL;
9120                 int len = 0;
9121
9122                 vcmd = &rdev->wiphy.vendor_commands[i];
9123
9124                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
9125                         continue;
9126
9127                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
9128                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
9129                         if (!wdev)
9130                                 return -EINVAL;
9131                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
9132                             !wdev->netdev)
9133                                 return -EINVAL;
9134
9135                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
9136                                 if (wdev->netdev &&
9137                                     !netif_running(wdev->netdev))
9138                                         return -ENETDOWN;
9139                                 if (!wdev->netdev && !wdev->p2p_started)
9140                                         return -ENETDOWN;
9141                         }
9142                 } else {
9143                         wdev = NULL;
9144                 }
9145
9146                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
9147                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9148                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9149                 }
9150
9151                 rdev->cur_cmd_info = info;
9152                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
9153                                                           data, len);
9154                 rdev->cur_cmd_info = NULL;
9155                 return err;
9156         }
9157
9158         return -EOPNOTSUPP;
9159 }
9160
9161 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
9162                                            enum nl80211_commands cmd,
9163                                            enum nl80211_attrs attr,
9164                                            int approxlen)
9165 {
9166         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9167
9168         if (WARN_ON(!rdev->cur_cmd_info))
9169                 return NULL;
9170
9171         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
9172                                            rdev->cur_cmd_info->snd_portid,
9173                                            rdev->cur_cmd_info->snd_seq,
9174                                            cmd, attr, NULL, GFP_KERNEL);
9175 }
9176 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
9177
9178 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
9179 {
9180         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
9181         void *hdr = ((void **)skb->cb)[1];
9182         struct nlattr *data = ((void **)skb->cb)[2];
9183
9184         if (WARN_ON(!rdev->cur_cmd_info)) {
9185                 kfree_skb(skb);
9186                 return -EINVAL;
9187         }
9188
9189         nla_nest_end(skb, data);
9190         genlmsg_end(skb, hdr);
9191         return genlmsg_reply(skb, rdev->cur_cmd_info);
9192 }
9193 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
9194
9195
9196 static int nl80211_set_qos_map(struct sk_buff *skb,
9197                                struct genl_info *info)
9198 {
9199         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9200         struct cfg80211_qos_map *qos_map = NULL;
9201         struct net_device *dev = info->user_ptr[1];
9202         u8 *pos, len, num_des, des_len, des;
9203         int ret;
9204
9205         if (!rdev->ops->set_qos_map)
9206                 return -EOPNOTSUPP;
9207
9208         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
9209                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
9210                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
9211
9212                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
9213                     len > IEEE80211_QOS_MAP_LEN_MAX)
9214                         return -EINVAL;
9215
9216                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
9217                 if (!qos_map)
9218                         return -ENOMEM;
9219
9220                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
9221                 if (num_des) {
9222                         des_len = num_des *
9223                                 sizeof(struct cfg80211_dscp_exception);
9224                         memcpy(qos_map->dscp_exception, pos, des_len);
9225                         qos_map->num_des = num_des;
9226                         for (des = 0; des < num_des; des++) {
9227                                 if (qos_map->dscp_exception[des].up > 7) {
9228                                         kfree(qos_map);
9229                                         return -EINVAL;
9230                                 }
9231                         }
9232                         pos += des_len;
9233                 }
9234                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
9235         }
9236
9237         wdev_lock(dev->ieee80211_ptr);
9238         ret = nl80211_key_allowed(dev->ieee80211_ptr);
9239         if (!ret)
9240                 ret = rdev_set_qos_map(rdev, dev, qos_map);
9241         wdev_unlock(dev->ieee80211_ptr);
9242
9243         kfree(qos_map);
9244         return ret;
9245 }
9246
9247 #define NL80211_FLAG_NEED_WIPHY         0x01
9248 #define NL80211_FLAG_NEED_NETDEV        0x02
9249 #define NL80211_FLAG_NEED_RTNL          0x04
9250 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
9251 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
9252                                          NL80211_FLAG_CHECK_NETDEV_UP)
9253 #define NL80211_FLAG_NEED_WDEV          0x10
9254 /* If a netdev is associated, it must be UP, P2P must be started */
9255 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
9256                                          NL80211_FLAG_CHECK_NETDEV_UP)
9257
9258 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
9259                             struct genl_info *info)
9260 {
9261         struct cfg80211_registered_device *rdev;
9262         struct wireless_dev *wdev;
9263         struct net_device *dev;
9264         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
9265
9266         if (rtnl)
9267                 rtnl_lock();
9268
9269         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
9270                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
9271                 if (IS_ERR(rdev)) {
9272                         if (rtnl)
9273                                 rtnl_unlock();
9274                         return PTR_ERR(rdev);
9275                 }
9276                 info->user_ptr[0] = rdev;
9277         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
9278                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9279                 ASSERT_RTNL();
9280
9281                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
9282                                                   info->attrs);
9283                 if (IS_ERR(wdev)) {
9284                         if (rtnl)
9285                                 rtnl_unlock();
9286                         return PTR_ERR(wdev);
9287                 }
9288
9289                 dev = wdev->netdev;
9290                 rdev = wiphy_to_dev(wdev->wiphy);
9291
9292                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
9293                         if (!dev) {
9294                                 if (rtnl)
9295                                         rtnl_unlock();
9296                                 return -EINVAL;
9297                         }
9298
9299                         info->user_ptr[1] = dev;
9300                 } else {
9301                         info->user_ptr[1] = wdev;
9302                 }
9303
9304                 if (dev) {
9305                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
9306                             !netif_running(dev)) {
9307                                 if (rtnl)
9308                                         rtnl_unlock();
9309                                 return -ENETDOWN;
9310                         }
9311
9312                         dev_hold(dev);
9313                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
9314                         if (!wdev->p2p_started) {
9315                                 if (rtnl)
9316                                         rtnl_unlock();
9317                                 return -ENETDOWN;
9318                         }
9319                 }
9320
9321                 info->user_ptr[0] = rdev;
9322         }
9323
9324         return 0;
9325 }
9326
9327 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
9328                               struct genl_info *info)
9329 {
9330         if (info->user_ptr[1]) {
9331                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9332                         struct wireless_dev *wdev = info->user_ptr[1];
9333
9334                         if (wdev->netdev)
9335                                 dev_put(wdev->netdev);
9336                 } else {
9337                         dev_put(info->user_ptr[1]);
9338                 }
9339         }
9340         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
9341                 rtnl_unlock();
9342 }
9343
9344 static const struct genl_ops nl80211_ops[] = {
9345         {
9346                 .cmd = NL80211_CMD_GET_WIPHY,
9347                 .doit = nl80211_get_wiphy,
9348                 .dumpit = nl80211_dump_wiphy,
9349                 .done = nl80211_dump_wiphy_done,
9350                 .policy = nl80211_policy,
9351                 /* can be retrieved by unprivileged users */
9352                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9353                                   NL80211_FLAG_NEED_RTNL,
9354         },
9355         {
9356                 .cmd = NL80211_CMD_SET_WIPHY,
9357                 .doit = nl80211_set_wiphy,
9358                 .policy = nl80211_policy,
9359                 .flags = GENL_ADMIN_PERM,
9360                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9361         },
9362         {
9363                 .cmd = NL80211_CMD_GET_INTERFACE,
9364                 .doit = nl80211_get_interface,
9365                 .dumpit = nl80211_dump_interface,
9366                 .policy = nl80211_policy,
9367                 /* can be retrieved by unprivileged users */
9368                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9369                                   NL80211_FLAG_NEED_RTNL,
9370         },
9371         {
9372                 .cmd = NL80211_CMD_SET_INTERFACE,
9373                 .doit = nl80211_set_interface,
9374                 .policy = nl80211_policy,
9375                 .flags = GENL_ADMIN_PERM,
9376                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9377                                   NL80211_FLAG_NEED_RTNL,
9378         },
9379         {
9380                 .cmd = NL80211_CMD_NEW_INTERFACE,
9381                 .doit = nl80211_new_interface,
9382                 .policy = nl80211_policy,
9383                 .flags = GENL_ADMIN_PERM,
9384                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9385                                   NL80211_FLAG_NEED_RTNL,
9386         },
9387         {
9388                 .cmd = NL80211_CMD_DEL_INTERFACE,
9389                 .doit = nl80211_del_interface,
9390                 .policy = nl80211_policy,
9391                 .flags = GENL_ADMIN_PERM,
9392                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9393                                   NL80211_FLAG_NEED_RTNL,
9394         },
9395         {
9396                 .cmd = NL80211_CMD_GET_KEY,
9397                 .doit = nl80211_get_key,
9398                 .policy = nl80211_policy,
9399                 .flags = GENL_ADMIN_PERM,
9400                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9401                                   NL80211_FLAG_NEED_RTNL,
9402         },
9403         {
9404                 .cmd = NL80211_CMD_SET_KEY,
9405                 .doit = nl80211_set_key,
9406                 .policy = nl80211_policy,
9407                 .flags = GENL_ADMIN_PERM,
9408                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9409                                   NL80211_FLAG_NEED_RTNL,
9410         },
9411         {
9412                 .cmd = NL80211_CMD_NEW_KEY,
9413                 .doit = nl80211_new_key,
9414                 .policy = nl80211_policy,
9415                 .flags = GENL_ADMIN_PERM,
9416                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9417                                   NL80211_FLAG_NEED_RTNL,
9418         },
9419         {
9420                 .cmd = NL80211_CMD_DEL_KEY,
9421                 .doit = nl80211_del_key,
9422                 .policy = nl80211_policy,
9423                 .flags = GENL_ADMIN_PERM,
9424                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9425                                   NL80211_FLAG_NEED_RTNL,
9426         },
9427         {
9428                 .cmd = NL80211_CMD_SET_BEACON,
9429                 .policy = nl80211_policy,
9430                 .flags = GENL_ADMIN_PERM,
9431                 .doit = nl80211_set_beacon,
9432                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9433                                   NL80211_FLAG_NEED_RTNL,
9434         },
9435         {
9436                 .cmd = NL80211_CMD_START_AP,
9437                 .policy = nl80211_policy,
9438                 .flags = GENL_ADMIN_PERM,
9439                 .doit = nl80211_start_ap,
9440                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9441                                   NL80211_FLAG_NEED_RTNL,
9442         },
9443         {
9444                 .cmd = NL80211_CMD_STOP_AP,
9445                 .policy = nl80211_policy,
9446                 .flags = GENL_ADMIN_PERM,
9447                 .doit = nl80211_stop_ap,
9448                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9449                                   NL80211_FLAG_NEED_RTNL,
9450         },
9451         {
9452                 .cmd = NL80211_CMD_GET_STATION,
9453                 .doit = nl80211_get_station,
9454                 .dumpit = nl80211_dump_station,
9455                 .policy = nl80211_policy,
9456                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9457                                   NL80211_FLAG_NEED_RTNL,
9458         },
9459         {
9460                 .cmd = NL80211_CMD_SET_STATION,
9461                 .doit = nl80211_set_station,
9462                 .policy = nl80211_policy,
9463                 .flags = GENL_ADMIN_PERM,
9464                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9465                                   NL80211_FLAG_NEED_RTNL,
9466         },
9467         {
9468                 .cmd = NL80211_CMD_NEW_STATION,
9469                 .doit = nl80211_new_station,
9470                 .policy = nl80211_policy,
9471                 .flags = GENL_ADMIN_PERM,
9472                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9473                                   NL80211_FLAG_NEED_RTNL,
9474         },
9475         {
9476                 .cmd = NL80211_CMD_DEL_STATION,
9477                 .doit = nl80211_del_station,
9478                 .policy = nl80211_policy,
9479                 .flags = GENL_ADMIN_PERM,
9480                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9481                                   NL80211_FLAG_NEED_RTNL,
9482         },
9483         {
9484                 .cmd = NL80211_CMD_GET_MPATH,
9485                 .doit = nl80211_get_mpath,
9486                 .dumpit = nl80211_dump_mpath,
9487                 .policy = nl80211_policy,
9488                 .flags = GENL_ADMIN_PERM,
9489                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9490                                   NL80211_FLAG_NEED_RTNL,
9491         },
9492         {
9493                 .cmd = NL80211_CMD_SET_MPATH,
9494                 .doit = nl80211_set_mpath,
9495                 .policy = nl80211_policy,
9496                 .flags = GENL_ADMIN_PERM,
9497                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9498                                   NL80211_FLAG_NEED_RTNL,
9499         },
9500         {
9501                 .cmd = NL80211_CMD_NEW_MPATH,
9502                 .doit = nl80211_new_mpath,
9503                 .policy = nl80211_policy,
9504                 .flags = GENL_ADMIN_PERM,
9505                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9506                                   NL80211_FLAG_NEED_RTNL,
9507         },
9508         {
9509                 .cmd = NL80211_CMD_DEL_MPATH,
9510                 .doit = nl80211_del_mpath,
9511                 .policy = nl80211_policy,
9512                 .flags = GENL_ADMIN_PERM,
9513                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9514                                   NL80211_FLAG_NEED_RTNL,
9515         },
9516         {
9517                 .cmd = NL80211_CMD_SET_BSS,
9518                 .doit = nl80211_set_bss,
9519                 .policy = nl80211_policy,
9520                 .flags = GENL_ADMIN_PERM,
9521                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9522                                   NL80211_FLAG_NEED_RTNL,
9523         },
9524         {
9525                 .cmd = NL80211_CMD_GET_REG,
9526                 .doit = nl80211_get_reg,
9527                 .policy = nl80211_policy,
9528                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9529                 /* can be retrieved by unprivileged users */
9530         },
9531         {
9532                 .cmd = NL80211_CMD_SET_REG,
9533                 .doit = nl80211_set_reg,
9534                 .policy = nl80211_policy,
9535                 .flags = GENL_ADMIN_PERM,
9536                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9537         },
9538         {
9539                 .cmd = NL80211_CMD_REQ_SET_REG,
9540                 .doit = nl80211_req_set_reg,
9541                 .policy = nl80211_policy,
9542                 .flags = GENL_ADMIN_PERM,
9543         },
9544         {
9545                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9546                 .doit = nl80211_get_mesh_config,
9547                 .policy = nl80211_policy,
9548                 /* can be retrieved by unprivileged users */
9549                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9550                                   NL80211_FLAG_NEED_RTNL,
9551         },
9552         {
9553                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9554                 .doit = nl80211_update_mesh_config,
9555                 .policy = nl80211_policy,
9556                 .flags = GENL_ADMIN_PERM,
9557                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9558                                   NL80211_FLAG_NEED_RTNL,
9559         },
9560         {
9561                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9562                 .doit = nl80211_trigger_scan,
9563                 .policy = nl80211_policy,
9564                 .flags = GENL_ADMIN_PERM,
9565                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9566                                   NL80211_FLAG_NEED_RTNL,
9567         },
9568         {
9569                 .cmd = NL80211_CMD_GET_SCAN,
9570                 .policy = nl80211_policy,
9571                 .dumpit = nl80211_dump_scan,
9572         },
9573         {
9574                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9575                 .doit = nl80211_start_sched_scan,
9576                 .policy = nl80211_policy,
9577                 .flags = GENL_ADMIN_PERM,
9578                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9579                                   NL80211_FLAG_NEED_RTNL,
9580         },
9581         {
9582                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9583                 .doit = nl80211_stop_sched_scan,
9584                 .policy = nl80211_policy,
9585                 .flags = GENL_ADMIN_PERM,
9586                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9587                                   NL80211_FLAG_NEED_RTNL,
9588         },
9589         {
9590                 .cmd = NL80211_CMD_AUTHENTICATE,
9591                 .doit = nl80211_authenticate,
9592                 .policy = nl80211_policy,
9593                 .flags = GENL_ADMIN_PERM,
9594                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9595                                   NL80211_FLAG_NEED_RTNL,
9596         },
9597         {
9598                 .cmd = NL80211_CMD_ASSOCIATE,
9599                 .doit = nl80211_associate,
9600                 .policy = nl80211_policy,
9601                 .flags = GENL_ADMIN_PERM,
9602                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9603                                   NL80211_FLAG_NEED_RTNL,
9604         },
9605         {
9606                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9607                 .doit = nl80211_deauthenticate,
9608                 .policy = nl80211_policy,
9609                 .flags = GENL_ADMIN_PERM,
9610                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9611                                   NL80211_FLAG_NEED_RTNL,
9612         },
9613         {
9614                 .cmd = NL80211_CMD_DISASSOCIATE,
9615                 .doit = nl80211_disassociate,
9616                 .policy = nl80211_policy,
9617                 .flags = GENL_ADMIN_PERM,
9618                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9619                                   NL80211_FLAG_NEED_RTNL,
9620         },
9621         {
9622                 .cmd = NL80211_CMD_JOIN_IBSS,
9623                 .doit = nl80211_join_ibss,
9624                 .policy = nl80211_policy,
9625                 .flags = GENL_ADMIN_PERM,
9626                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9627                                   NL80211_FLAG_NEED_RTNL,
9628         },
9629         {
9630                 .cmd = NL80211_CMD_LEAVE_IBSS,
9631                 .doit = nl80211_leave_ibss,
9632                 .policy = nl80211_policy,
9633                 .flags = GENL_ADMIN_PERM,
9634                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9635                                   NL80211_FLAG_NEED_RTNL,
9636         },
9637 #ifdef CONFIG_NL80211_TESTMODE
9638         {
9639                 .cmd = NL80211_CMD_TESTMODE,
9640                 .doit = nl80211_testmode_do,
9641                 .dumpit = nl80211_testmode_dump,
9642                 .policy = nl80211_policy,
9643                 .flags = GENL_ADMIN_PERM,
9644                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9645                                   NL80211_FLAG_NEED_RTNL,
9646         },
9647 #endif
9648         {
9649                 .cmd = NL80211_CMD_CONNECT,
9650                 .doit = nl80211_connect,
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_DISCONNECT,
9658                 .doit = nl80211_disconnect,
9659                 .policy = nl80211_policy,
9660                 .flags = GENL_ADMIN_PERM,
9661                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9662                                   NL80211_FLAG_NEED_RTNL,
9663         },
9664         {
9665                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9666                 .doit = nl80211_wiphy_netns,
9667                 .policy = nl80211_policy,
9668                 .flags = GENL_ADMIN_PERM,
9669                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9670                                   NL80211_FLAG_NEED_RTNL,
9671         },
9672         {
9673                 .cmd = NL80211_CMD_GET_SURVEY,
9674                 .policy = nl80211_policy,
9675                 .dumpit = nl80211_dump_survey,
9676         },
9677         {
9678                 .cmd = NL80211_CMD_SET_PMKSA,
9679                 .doit = nl80211_setdel_pmksa,
9680                 .policy = nl80211_policy,
9681                 .flags = GENL_ADMIN_PERM,
9682                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9683                                   NL80211_FLAG_NEED_RTNL,
9684         },
9685         {
9686                 .cmd = NL80211_CMD_DEL_PMKSA,
9687                 .doit = nl80211_setdel_pmksa,
9688                 .policy = nl80211_policy,
9689                 .flags = GENL_ADMIN_PERM,
9690                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9691                                   NL80211_FLAG_NEED_RTNL,
9692         },
9693         {
9694                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9695                 .doit = nl80211_flush_pmksa,
9696                 .policy = nl80211_policy,
9697                 .flags = GENL_ADMIN_PERM,
9698                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9699                                   NL80211_FLAG_NEED_RTNL,
9700         },
9701         {
9702                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9703                 .doit = nl80211_remain_on_channel,
9704                 .policy = nl80211_policy,
9705                 .flags = GENL_ADMIN_PERM,
9706                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9707                                   NL80211_FLAG_NEED_RTNL,
9708         },
9709         {
9710                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9711                 .doit = nl80211_cancel_remain_on_channel,
9712                 .policy = nl80211_policy,
9713                 .flags = GENL_ADMIN_PERM,
9714                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9715                                   NL80211_FLAG_NEED_RTNL,
9716         },
9717         {
9718                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9719                 .doit = nl80211_set_tx_bitrate_mask,
9720                 .policy = nl80211_policy,
9721                 .flags = GENL_ADMIN_PERM,
9722                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9723                                   NL80211_FLAG_NEED_RTNL,
9724         },
9725         {
9726                 .cmd = NL80211_CMD_REGISTER_FRAME,
9727                 .doit = nl80211_register_mgmt,
9728                 .policy = nl80211_policy,
9729                 .flags = GENL_ADMIN_PERM,
9730                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9731                                   NL80211_FLAG_NEED_RTNL,
9732         },
9733         {
9734                 .cmd = NL80211_CMD_FRAME,
9735                 .doit = nl80211_tx_mgmt,
9736                 .policy = nl80211_policy,
9737                 .flags = GENL_ADMIN_PERM,
9738                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9739                                   NL80211_FLAG_NEED_RTNL,
9740         },
9741         {
9742                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9743                 .doit = nl80211_tx_mgmt_cancel_wait,
9744                 .policy = nl80211_policy,
9745                 .flags = GENL_ADMIN_PERM,
9746                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9747                                   NL80211_FLAG_NEED_RTNL,
9748         },
9749         {
9750                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9751                 .doit = nl80211_set_power_save,
9752                 .policy = nl80211_policy,
9753                 .flags = GENL_ADMIN_PERM,
9754                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9755                                   NL80211_FLAG_NEED_RTNL,
9756         },
9757         {
9758                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9759                 .doit = nl80211_get_power_save,
9760                 .policy = nl80211_policy,
9761                 /* can be retrieved by unprivileged users */
9762                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9763                                   NL80211_FLAG_NEED_RTNL,
9764         },
9765         {
9766                 .cmd = NL80211_CMD_SET_CQM,
9767                 .doit = nl80211_set_cqm,
9768                 .policy = nl80211_policy,
9769                 .flags = GENL_ADMIN_PERM,
9770                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9771                                   NL80211_FLAG_NEED_RTNL,
9772         },
9773         {
9774                 .cmd = NL80211_CMD_SET_CHANNEL,
9775                 .doit = nl80211_set_channel,
9776                 .policy = nl80211_policy,
9777                 .flags = GENL_ADMIN_PERM,
9778                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9779                                   NL80211_FLAG_NEED_RTNL,
9780         },
9781         {
9782                 .cmd = NL80211_CMD_SET_WDS_PEER,
9783                 .doit = nl80211_set_wds_peer,
9784                 .policy = nl80211_policy,
9785                 .flags = GENL_ADMIN_PERM,
9786                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9787                                   NL80211_FLAG_NEED_RTNL,
9788         },
9789         {
9790                 .cmd = NL80211_CMD_JOIN_MESH,
9791                 .doit = nl80211_join_mesh,
9792                 .policy = nl80211_policy,
9793                 .flags = GENL_ADMIN_PERM,
9794                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9795                                   NL80211_FLAG_NEED_RTNL,
9796         },
9797         {
9798                 .cmd = NL80211_CMD_LEAVE_MESH,
9799                 .doit = nl80211_leave_mesh,
9800                 .policy = nl80211_policy,
9801                 .flags = GENL_ADMIN_PERM,
9802                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9803                                   NL80211_FLAG_NEED_RTNL,
9804         },
9805 #ifdef CONFIG_PM
9806         {
9807                 .cmd = NL80211_CMD_GET_WOWLAN,
9808                 .doit = nl80211_get_wowlan,
9809                 .policy = nl80211_policy,
9810                 /* can be retrieved by unprivileged users */
9811                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9812                                   NL80211_FLAG_NEED_RTNL,
9813         },
9814         {
9815                 .cmd = NL80211_CMD_SET_WOWLAN,
9816                 .doit = nl80211_set_wowlan,
9817                 .policy = nl80211_policy,
9818                 .flags = GENL_ADMIN_PERM,
9819                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9820                                   NL80211_FLAG_NEED_RTNL,
9821         },
9822 #endif
9823         {
9824                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9825                 .doit = nl80211_set_rekey_data,
9826                 .policy = nl80211_policy,
9827                 .flags = GENL_ADMIN_PERM,
9828                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9829                                   NL80211_FLAG_NEED_RTNL,
9830         },
9831         {
9832                 .cmd = NL80211_CMD_TDLS_MGMT,
9833                 .doit = nl80211_tdls_mgmt,
9834                 .policy = nl80211_policy,
9835                 .flags = GENL_ADMIN_PERM,
9836                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9837                                   NL80211_FLAG_NEED_RTNL,
9838         },
9839         {
9840                 .cmd = NL80211_CMD_TDLS_OPER,
9841                 .doit = nl80211_tdls_oper,
9842                 .policy = nl80211_policy,
9843                 .flags = GENL_ADMIN_PERM,
9844                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9845                                   NL80211_FLAG_NEED_RTNL,
9846         },
9847         {
9848                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9849                 .doit = nl80211_register_unexpected_frame,
9850                 .policy = nl80211_policy,
9851                 .flags = GENL_ADMIN_PERM,
9852                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9853                                   NL80211_FLAG_NEED_RTNL,
9854         },
9855         {
9856                 .cmd = NL80211_CMD_PROBE_CLIENT,
9857                 .doit = nl80211_probe_client,
9858                 .policy = nl80211_policy,
9859                 .flags = GENL_ADMIN_PERM,
9860                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9861                                   NL80211_FLAG_NEED_RTNL,
9862         },
9863         {
9864                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9865                 .doit = nl80211_register_beacons,
9866                 .policy = nl80211_policy,
9867                 .flags = GENL_ADMIN_PERM,
9868                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9869                                   NL80211_FLAG_NEED_RTNL,
9870         },
9871         {
9872                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9873                 .doit = nl80211_set_noack_map,
9874                 .policy = nl80211_policy,
9875                 .flags = GENL_ADMIN_PERM,
9876                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9877                                   NL80211_FLAG_NEED_RTNL,
9878         },
9879         {
9880                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9881                 .doit = nl80211_start_p2p_device,
9882                 .policy = nl80211_policy,
9883                 .flags = GENL_ADMIN_PERM,
9884                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9885                                   NL80211_FLAG_NEED_RTNL,
9886         },
9887         {
9888                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
9889                 .doit = nl80211_stop_p2p_device,
9890                 .policy = nl80211_policy,
9891                 .flags = GENL_ADMIN_PERM,
9892                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9893                                   NL80211_FLAG_NEED_RTNL,
9894         },
9895         {
9896                 .cmd = NL80211_CMD_SET_MCAST_RATE,
9897                 .doit = nl80211_set_mcast_rate,
9898                 .policy = nl80211_policy,
9899                 .flags = GENL_ADMIN_PERM,
9900                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9901                                   NL80211_FLAG_NEED_RTNL,
9902         },
9903         {
9904                 .cmd = NL80211_CMD_SET_MAC_ACL,
9905                 .doit = nl80211_set_mac_acl,
9906                 .policy = nl80211_policy,
9907                 .flags = GENL_ADMIN_PERM,
9908                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9909                                   NL80211_FLAG_NEED_RTNL,
9910         },
9911         {
9912                 .cmd = NL80211_CMD_RADAR_DETECT,
9913                 .doit = nl80211_start_radar_detection,
9914                 .policy = nl80211_policy,
9915                 .flags = GENL_ADMIN_PERM,
9916                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9917                                   NL80211_FLAG_NEED_RTNL,
9918         },
9919         {
9920                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9921                 .doit = nl80211_get_protocol_features,
9922                 .policy = nl80211_policy,
9923         },
9924         {
9925                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9926                 .doit = nl80211_update_ft_ies,
9927                 .policy = nl80211_policy,
9928                 .flags = GENL_ADMIN_PERM,
9929                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9930                                   NL80211_FLAG_NEED_RTNL,
9931         },
9932         {
9933                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9934                 .doit = nl80211_crit_protocol_start,
9935                 .policy = nl80211_policy,
9936                 .flags = GENL_ADMIN_PERM,
9937                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9938                                   NL80211_FLAG_NEED_RTNL,
9939         },
9940         {
9941                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9942                 .doit = nl80211_crit_protocol_stop,
9943                 .policy = nl80211_policy,
9944                 .flags = GENL_ADMIN_PERM,
9945                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9946                                   NL80211_FLAG_NEED_RTNL,
9947         },
9948         {
9949                 .cmd = NL80211_CMD_GET_COALESCE,
9950                 .doit = nl80211_get_coalesce,
9951                 .policy = nl80211_policy,
9952                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9953                                   NL80211_FLAG_NEED_RTNL,
9954         },
9955         {
9956                 .cmd = NL80211_CMD_SET_COALESCE,
9957                 .doit = nl80211_set_coalesce,
9958                 .policy = nl80211_policy,
9959                 .flags = GENL_ADMIN_PERM,
9960                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9961                                   NL80211_FLAG_NEED_RTNL,
9962         },
9963         {
9964                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
9965                 .doit = nl80211_channel_switch,
9966                 .policy = nl80211_policy,
9967                 .flags = GENL_ADMIN_PERM,
9968                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9969                                   NL80211_FLAG_NEED_RTNL,
9970         },
9971         {
9972                 .cmd = NL80211_CMD_VENDOR,
9973                 .doit = nl80211_vendor_cmd,
9974                 .policy = nl80211_policy,
9975                 .flags = GENL_ADMIN_PERM,
9976                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9977                                   NL80211_FLAG_NEED_RTNL,
9978         },
9979         {
9980                 .cmd = NL80211_CMD_SET_QOS_MAP,
9981                 .doit = nl80211_set_qos_map,
9982                 .policy = nl80211_policy,
9983                 .flags = GENL_ADMIN_PERM,
9984                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9985                                   NL80211_FLAG_NEED_RTNL,
9986         },
9987 };
9988
9989 /* notification functions */
9990
9991 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9992 {
9993         struct sk_buff *msg;
9994         struct nl80211_dump_wiphy_state state = {};
9995
9996         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9997         if (!msg)
9998                 return;
9999
10000         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
10001                 nlmsg_free(msg);
10002                 return;
10003         }
10004
10005         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10006                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
10007 }
10008
10009 static int nl80211_add_scan_req(struct sk_buff *msg,
10010                                 struct cfg80211_registered_device *rdev)
10011 {
10012         struct cfg80211_scan_request *req = rdev->scan_req;
10013         struct nlattr *nest;
10014         int i;
10015
10016         if (WARN_ON(!req))
10017                 return 0;
10018
10019         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
10020         if (!nest)
10021                 goto nla_put_failure;
10022         for (i = 0; i < req->n_ssids; i++) {
10023                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
10024                         goto nla_put_failure;
10025         }
10026         nla_nest_end(msg, nest);
10027
10028         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10029         if (!nest)
10030                 goto nla_put_failure;
10031         for (i = 0; i < req->n_channels; i++) {
10032                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10033                         goto nla_put_failure;
10034         }
10035         nla_nest_end(msg, nest);
10036
10037         if (req->ie &&
10038             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
10039                 goto nla_put_failure;
10040
10041         if (req->flags &&
10042             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
10043                 goto nla_put_failure;
10044
10045         return 0;
10046  nla_put_failure:
10047         return -ENOBUFS;
10048 }
10049
10050 static int nl80211_send_scan_msg(struct sk_buff *msg,
10051                                  struct cfg80211_registered_device *rdev,
10052                                  struct wireless_dev *wdev,
10053                                  u32 portid, u32 seq, int flags,
10054                                  u32 cmd)
10055 {
10056         void *hdr;
10057
10058         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10059         if (!hdr)
10060                 return -1;
10061
10062         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10063             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10064                                          wdev->netdev->ifindex)) ||
10065             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10066                 goto nla_put_failure;
10067
10068         /* ignore errors and send incomplete event anyway */
10069         nl80211_add_scan_req(msg, rdev);
10070
10071         return genlmsg_end(msg, hdr);
10072
10073  nla_put_failure:
10074         genlmsg_cancel(msg, hdr);
10075         return -EMSGSIZE;
10076 }
10077
10078 static int
10079 nl80211_send_sched_scan_msg(struct sk_buff *msg,
10080                             struct cfg80211_registered_device *rdev,
10081                             struct net_device *netdev,
10082                             u32 portid, u32 seq, int flags, u32 cmd)
10083 {
10084         void *hdr;
10085
10086         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10087         if (!hdr)
10088                 return -1;
10089
10090         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10091             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10092                 goto nla_put_failure;
10093
10094         return genlmsg_end(msg, hdr);
10095
10096  nla_put_failure:
10097         genlmsg_cancel(msg, hdr);
10098         return -EMSGSIZE;
10099 }
10100
10101 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
10102                              struct wireless_dev *wdev)
10103 {
10104         struct sk_buff *msg;
10105
10106         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10107         if (!msg)
10108                 return;
10109
10110         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10111                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
10112                 nlmsg_free(msg);
10113                 return;
10114         }
10115
10116         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10117                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10118 }
10119
10120 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
10121                                        struct wireless_dev *wdev, bool aborted)
10122 {
10123         struct sk_buff *msg;
10124
10125         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10126         if (!msg)
10127                 return NULL;
10128
10129         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10130                                   aborted ? NL80211_CMD_SCAN_ABORTED :
10131                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
10132                 nlmsg_free(msg);
10133                 return NULL;
10134         }
10135
10136         return msg;
10137 }
10138
10139 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
10140                               struct sk_buff *msg)
10141 {
10142         if (!msg)
10143                 return;
10144
10145         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10146                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10147 }
10148
10149 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
10150                                      struct net_device *netdev)
10151 {
10152         struct sk_buff *msg;
10153
10154         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10155         if (!msg)
10156                 return;
10157
10158         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
10159                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
10160                 nlmsg_free(msg);
10161                 return;
10162         }
10163
10164         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10165                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10166 }
10167
10168 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
10169                              struct net_device *netdev, u32 cmd)
10170 {
10171         struct sk_buff *msg;
10172
10173         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10174         if (!msg)
10175                 return;
10176
10177         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
10178                 nlmsg_free(msg);
10179                 return;
10180         }
10181
10182         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10183                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10184 }
10185
10186 /*
10187  * This can happen on global regulatory changes or device specific settings
10188  * based on custom world regulatory domains.
10189  */
10190 void nl80211_send_reg_change_event(struct regulatory_request *request)
10191 {
10192         struct sk_buff *msg;
10193         void *hdr;
10194
10195         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10196         if (!msg)
10197                 return;
10198
10199         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
10200         if (!hdr) {
10201                 nlmsg_free(msg);
10202                 return;
10203         }
10204
10205         /* Userspace can always count this one always being set */
10206         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
10207                 goto nla_put_failure;
10208
10209         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
10210                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10211                                NL80211_REGDOM_TYPE_WORLD))
10212                         goto nla_put_failure;
10213         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
10214                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10215                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
10216                         goto nla_put_failure;
10217         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
10218                    request->intersect) {
10219                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10220                                NL80211_REGDOM_TYPE_INTERSECTION))
10221                         goto nla_put_failure;
10222         } else {
10223                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10224                                NL80211_REGDOM_TYPE_COUNTRY) ||
10225                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
10226                                    request->alpha2))
10227                         goto nla_put_failure;
10228         }
10229
10230         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
10231             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
10232                 goto nla_put_failure;
10233
10234         genlmsg_end(msg, hdr);
10235
10236         rcu_read_lock();
10237         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10238                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10239         rcu_read_unlock();
10240
10241         return;
10242
10243 nla_put_failure:
10244         genlmsg_cancel(msg, hdr);
10245         nlmsg_free(msg);
10246 }
10247
10248 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
10249                                     struct net_device *netdev,
10250                                     const u8 *buf, size_t len,
10251                                     enum nl80211_commands cmd, gfp_t gfp)
10252 {
10253         struct sk_buff *msg;
10254         void *hdr;
10255
10256         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10257         if (!msg)
10258                 return;
10259
10260         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10261         if (!hdr) {
10262                 nlmsg_free(msg);
10263                 return;
10264         }
10265
10266         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10267             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10268             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10269                 goto nla_put_failure;
10270
10271         genlmsg_end(msg, hdr);
10272
10273         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10274                                 NL80211_MCGRP_MLME, gfp);
10275         return;
10276
10277  nla_put_failure:
10278         genlmsg_cancel(msg, hdr);
10279         nlmsg_free(msg);
10280 }
10281
10282 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
10283                           struct net_device *netdev, const u8 *buf,
10284                           size_t len, gfp_t gfp)
10285 {
10286         nl80211_send_mlme_event(rdev, netdev, buf, len,
10287                                 NL80211_CMD_AUTHENTICATE, gfp);
10288 }
10289
10290 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
10291                            struct net_device *netdev, const u8 *buf,
10292                            size_t len, gfp_t gfp)
10293 {
10294         nl80211_send_mlme_event(rdev, netdev, buf, len,
10295                                 NL80211_CMD_ASSOCIATE, gfp);
10296 }
10297
10298 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
10299                          struct net_device *netdev, const u8 *buf,
10300                          size_t len, gfp_t gfp)
10301 {
10302         nl80211_send_mlme_event(rdev, netdev, buf, len,
10303                                 NL80211_CMD_DEAUTHENTICATE, gfp);
10304 }
10305
10306 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
10307                            struct net_device *netdev, const u8 *buf,
10308                            size_t len, gfp_t gfp)
10309 {
10310         nl80211_send_mlme_event(rdev, netdev, buf, len,
10311                                 NL80211_CMD_DISASSOCIATE, gfp);
10312 }
10313
10314 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
10315                                   size_t len)
10316 {
10317         struct wireless_dev *wdev = dev->ieee80211_ptr;
10318         struct wiphy *wiphy = wdev->wiphy;
10319         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10320         const struct ieee80211_mgmt *mgmt = (void *)buf;
10321         u32 cmd;
10322
10323         if (WARN_ON(len < 2))
10324                 return;
10325
10326         if (ieee80211_is_deauth(mgmt->frame_control))
10327                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
10328         else
10329                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
10330
10331         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
10332         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
10333 }
10334 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
10335
10336 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
10337                                       struct net_device *netdev, int cmd,
10338                                       const u8 *addr, gfp_t gfp)
10339 {
10340         struct sk_buff *msg;
10341         void *hdr;
10342
10343         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10344         if (!msg)
10345                 return;
10346
10347         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10348         if (!hdr) {
10349                 nlmsg_free(msg);
10350                 return;
10351         }
10352
10353         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10354             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10355             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
10356             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10357                 goto nla_put_failure;
10358
10359         genlmsg_end(msg, hdr);
10360
10361         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10362                                 NL80211_MCGRP_MLME, gfp);
10363         return;
10364
10365  nla_put_failure:
10366         genlmsg_cancel(msg, hdr);
10367         nlmsg_free(msg);
10368 }
10369
10370 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
10371                                struct net_device *netdev, const u8 *addr,
10372                                gfp_t gfp)
10373 {
10374         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
10375                                   addr, gfp);
10376 }
10377
10378 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
10379                                 struct net_device *netdev, const u8 *addr,
10380                                 gfp_t gfp)
10381 {
10382         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
10383                                   addr, gfp);
10384 }
10385
10386 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
10387                                  struct net_device *netdev, const u8 *bssid,
10388                                  const u8 *req_ie, size_t req_ie_len,
10389                                  const u8 *resp_ie, size_t resp_ie_len,
10390                                  u16 status, gfp_t gfp)
10391 {
10392         struct sk_buff *msg;
10393         void *hdr;
10394
10395         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10396         if (!msg)
10397                 return;
10398
10399         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10400         if (!hdr) {
10401                 nlmsg_free(msg);
10402                 return;
10403         }
10404
10405         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10406             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10407             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10408             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10409             (req_ie &&
10410              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10411             (resp_ie &&
10412              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10413                 goto nla_put_failure;
10414
10415         genlmsg_end(msg, hdr);
10416
10417         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10418                                 NL80211_MCGRP_MLME, gfp);
10419         return;
10420
10421  nla_put_failure:
10422         genlmsg_cancel(msg, hdr);
10423         nlmsg_free(msg);
10424
10425 }
10426
10427 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10428                          struct net_device *netdev, const u8 *bssid,
10429                          const u8 *req_ie, size_t req_ie_len,
10430                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10431 {
10432         struct sk_buff *msg;
10433         void *hdr;
10434
10435         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10436         if (!msg)
10437                 return;
10438
10439         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10440         if (!hdr) {
10441                 nlmsg_free(msg);
10442                 return;
10443         }
10444
10445         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10446             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10447             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10448             (req_ie &&
10449              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10450             (resp_ie &&
10451              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10452                 goto nla_put_failure;
10453
10454         genlmsg_end(msg, hdr);
10455
10456         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10457                                 NL80211_MCGRP_MLME, gfp);
10458         return;
10459
10460  nla_put_failure:
10461         genlmsg_cancel(msg, hdr);
10462         nlmsg_free(msg);
10463
10464 }
10465
10466 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10467                                struct net_device *netdev, u16 reason,
10468                                const u8 *ie, size_t ie_len, bool from_ap)
10469 {
10470         struct sk_buff *msg;
10471         void *hdr;
10472
10473         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10474         if (!msg)
10475                 return;
10476
10477         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10478         if (!hdr) {
10479                 nlmsg_free(msg);
10480                 return;
10481         }
10482
10483         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10484             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10485             (from_ap && reason &&
10486              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10487             (from_ap &&
10488              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10489             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10490                 goto nla_put_failure;
10491
10492         genlmsg_end(msg, hdr);
10493
10494         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10495                                 NL80211_MCGRP_MLME, GFP_KERNEL);
10496         return;
10497
10498  nla_put_failure:
10499         genlmsg_cancel(msg, hdr);
10500         nlmsg_free(msg);
10501
10502 }
10503
10504 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10505                              struct net_device *netdev, const u8 *bssid,
10506                              gfp_t gfp)
10507 {
10508         struct sk_buff *msg;
10509         void *hdr;
10510
10511         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10512         if (!msg)
10513                 return;
10514
10515         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10516         if (!hdr) {
10517                 nlmsg_free(msg);
10518                 return;
10519         }
10520
10521         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10522             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10523             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10524                 goto nla_put_failure;
10525
10526         genlmsg_end(msg, hdr);
10527
10528         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10529                                 NL80211_MCGRP_MLME, gfp);
10530         return;
10531
10532  nla_put_failure:
10533         genlmsg_cancel(msg, hdr);
10534         nlmsg_free(msg);
10535 }
10536
10537 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10538                                         const u8* ie, u8 ie_len, gfp_t gfp)
10539 {
10540         struct wireless_dev *wdev = dev->ieee80211_ptr;
10541         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10542         struct sk_buff *msg;
10543         void *hdr;
10544
10545         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10546                 return;
10547
10548         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10549
10550         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10551         if (!msg)
10552                 return;
10553
10554         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10555         if (!hdr) {
10556                 nlmsg_free(msg);
10557                 return;
10558         }
10559
10560         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10561             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10562             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10563             (ie_len && ie &&
10564              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10565                 goto nla_put_failure;
10566
10567         genlmsg_end(msg, hdr);
10568
10569         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10570                                 NL80211_MCGRP_MLME, gfp);
10571         return;
10572
10573  nla_put_failure:
10574         genlmsg_cancel(msg, hdr);
10575         nlmsg_free(msg);
10576 }
10577 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10578
10579 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10580                                  struct net_device *netdev, const u8 *addr,
10581                                  enum nl80211_key_type key_type, int key_id,
10582                                  const u8 *tsc, gfp_t gfp)
10583 {
10584         struct sk_buff *msg;
10585         void *hdr;
10586
10587         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10588         if (!msg)
10589                 return;
10590
10591         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10592         if (!hdr) {
10593                 nlmsg_free(msg);
10594                 return;
10595         }
10596
10597         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10598             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10599             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10600             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10601             (key_id != -1 &&
10602              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10603             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10604                 goto nla_put_failure;
10605
10606         genlmsg_end(msg, hdr);
10607
10608         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10609                                 NL80211_MCGRP_MLME, gfp);
10610         return;
10611
10612  nla_put_failure:
10613         genlmsg_cancel(msg, hdr);
10614         nlmsg_free(msg);
10615 }
10616
10617 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10618                                     struct ieee80211_channel *channel_before,
10619                                     struct ieee80211_channel *channel_after)
10620 {
10621         struct sk_buff *msg;
10622         void *hdr;
10623         struct nlattr *nl_freq;
10624
10625         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10626         if (!msg)
10627                 return;
10628
10629         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10630         if (!hdr) {
10631                 nlmsg_free(msg);
10632                 return;
10633         }
10634
10635         /*
10636          * Since we are applying the beacon hint to a wiphy we know its
10637          * wiphy_idx is valid
10638          */
10639         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10640                 goto nla_put_failure;
10641
10642         /* Before */
10643         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10644         if (!nl_freq)
10645                 goto nla_put_failure;
10646         if (nl80211_msg_put_channel(msg, channel_before, false))
10647                 goto nla_put_failure;
10648         nla_nest_end(msg, nl_freq);
10649
10650         /* After */
10651         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10652         if (!nl_freq)
10653                 goto nla_put_failure;
10654         if (nl80211_msg_put_channel(msg, channel_after, false))
10655                 goto nla_put_failure;
10656         nla_nest_end(msg, nl_freq);
10657
10658         genlmsg_end(msg, hdr);
10659
10660         rcu_read_lock();
10661         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10662                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10663         rcu_read_unlock();
10664
10665         return;
10666
10667 nla_put_failure:
10668         genlmsg_cancel(msg, hdr);
10669         nlmsg_free(msg);
10670 }
10671
10672 static void nl80211_send_remain_on_chan_event(
10673         int cmd, struct cfg80211_registered_device *rdev,
10674         struct wireless_dev *wdev, u64 cookie,
10675         struct ieee80211_channel *chan,
10676         unsigned int duration, gfp_t gfp)
10677 {
10678         struct sk_buff *msg;
10679         void *hdr;
10680
10681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10682         if (!msg)
10683                 return;
10684
10685         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10686         if (!hdr) {
10687                 nlmsg_free(msg);
10688                 return;
10689         }
10690
10691         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10692             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10693                                          wdev->netdev->ifindex)) ||
10694             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10695             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10696             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10697                         NL80211_CHAN_NO_HT) ||
10698             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10699                 goto nla_put_failure;
10700
10701         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10702             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10703                 goto nla_put_failure;
10704
10705         genlmsg_end(msg, hdr);
10706
10707         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10708                                 NL80211_MCGRP_MLME, gfp);
10709         return;
10710
10711  nla_put_failure:
10712         genlmsg_cancel(msg, hdr);
10713         nlmsg_free(msg);
10714 }
10715
10716 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10717                                struct ieee80211_channel *chan,
10718                                unsigned int duration, gfp_t gfp)
10719 {
10720         struct wiphy *wiphy = wdev->wiphy;
10721         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10722
10723         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10724         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10725                                           rdev, wdev, cookie, chan,
10726                                           duration, gfp);
10727 }
10728 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10729
10730 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10731                                         struct ieee80211_channel *chan,
10732                                         gfp_t gfp)
10733 {
10734         struct wiphy *wiphy = wdev->wiphy;
10735         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10736
10737         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10738         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10739                                           rdev, wdev, cookie, chan, 0, gfp);
10740 }
10741 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10742
10743 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10744                       struct station_info *sinfo, gfp_t gfp)
10745 {
10746         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10747         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10748         struct sk_buff *msg;
10749
10750         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10751
10752         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10753         if (!msg)
10754                 return;
10755
10756         if (nl80211_send_station(msg, 0, 0, 0,
10757                                  rdev, dev, mac_addr, sinfo) < 0) {
10758                 nlmsg_free(msg);
10759                 return;
10760         }
10761
10762         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10763                                 NL80211_MCGRP_MLME, gfp);
10764 }
10765 EXPORT_SYMBOL(cfg80211_new_sta);
10766
10767 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10768 {
10769         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10770         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10771         struct sk_buff *msg;
10772         void *hdr;
10773
10774         trace_cfg80211_del_sta(dev, mac_addr);
10775
10776         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10777         if (!msg)
10778                 return;
10779
10780         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10781         if (!hdr) {
10782                 nlmsg_free(msg);
10783                 return;
10784         }
10785
10786         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10787             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10788                 goto nla_put_failure;
10789
10790         genlmsg_end(msg, hdr);
10791
10792         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10793                                 NL80211_MCGRP_MLME, gfp);
10794         return;
10795
10796  nla_put_failure:
10797         genlmsg_cancel(msg, hdr);
10798         nlmsg_free(msg);
10799 }
10800 EXPORT_SYMBOL(cfg80211_del_sta);
10801
10802 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10803                           enum nl80211_connect_failed_reason reason,
10804                           gfp_t gfp)
10805 {
10806         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10807         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10808         struct sk_buff *msg;
10809         void *hdr;
10810
10811         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10812         if (!msg)
10813                 return;
10814
10815         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10816         if (!hdr) {
10817                 nlmsg_free(msg);
10818                 return;
10819         }
10820
10821         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10822             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10823             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10824                 goto nla_put_failure;
10825
10826         genlmsg_end(msg, hdr);
10827
10828         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10829                                 NL80211_MCGRP_MLME, gfp);
10830         return;
10831
10832  nla_put_failure:
10833         genlmsg_cancel(msg, hdr);
10834         nlmsg_free(msg);
10835 }
10836 EXPORT_SYMBOL(cfg80211_conn_failed);
10837
10838 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10839                                        const u8 *addr, gfp_t gfp)
10840 {
10841         struct wireless_dev *wdev = dev->ieee80211_ptr;
10842         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10843         struct sk_buff *msg;
10844         void *hdr;
10845         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10846
10847         if (!nlportid)
10848                 return false;
10849
10850         msg = nlmsg_new(100, gfp);
10851         if (!msg)
10852                 return true;
10853
10854         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10855         if (!hdr) {
10856                 nlmsg_free(msg);
10857                 return true;
10858         }
10859
10860         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10861             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10862             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10863                 goto nla_put_failure;
10864
10865         genlmsg_end(msg, hdr);
10866         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10867         return true;
10868
10869  nla_put_failure:
10870         genlmsg_cancel(msg, hdr);
10871         nlmsg_free(msg);
10872         return true;
10873 }
10874
10875 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10876                                 const u8 *addr, gfp_t gfp)
10877 {
10878         struct wireless_dev *wdev = dev->ieee80211_ptr;
10879         bool ret;
10880
10881         trace_cfg80211_rx_spurious_frame(dev, addr);
10882
10883         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10884                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
10885                 trace_cfg80211_return_bool(false);
10886                 return false;
10887         }
10888         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
10889                                          addr, gfp);
10890         trace_cfg80211_return_bool(ret);
10891         return ret;
10892 }
10893 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
10894
10895 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
10896                                         const u8 *addr, gfp_t gfp)
10897 {
10898         struct wireless_dev *wdev = dev->ieee80211_ptr;
10899         bool ret;
10900
10901         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
10902
10903         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10904                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10905                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
10906                 trace_cfg80211_return_bool(false);
10907                 return false;
10908         }
10909         ret = __nl80211_unexpected_frame(dev,
10910                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
10911                                          addr, gfp);
10912         trace_cfg80211_return_bool(ret);
10913         return ret;
10914 }
10915 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
10916
10917 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10918                       struct wireless_dev *wdev, u32 nlportid,
10919                       int freq, int sig_dbm,
10920                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
10921 {
10922         struct net_device *netdev = wdev->netdev;
10923         struct sk_buff *msg;
10924         void *hdr;
10925
10926         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10927         if (!msg)
10928                 return -ENOMEM;
10929
10930         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10931         if (!hdr) {
10932                 nlmsg_free(msg);
10933                 return -ENOMEM;
10934         }
10935
10936         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10937             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10938                                         netdev->ifindex)) ||
10939             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10940             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10941             (sig_dbm &&
10942              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10943             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10944             (flags &&
10945              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
10946                 goto nla_put_failure;
10947
10948         genlmsg_end(msg, hdr);
10949
10950         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10951
10952  nla_put_failure:
10953         genlmsg_cancel(msg, hdr);
10954         nlmsg_free(msg);
10955         return -ENOBUFS;
10956 }
10957
10958 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10959                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10960 {
10961         struct wiphy *wiphy = wdev->wiphy;
10962         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10963         struct net_device *netdev = wdev->netdev;
10964         struct sk_buff *msg;
10965         void *hdr;
10966
10967         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10968
10969         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10970         if (!msg)
10971                 return;
10972
10973         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10974         if (!hdr) {
10975                 nlmsg_free(msg);
10976                 return;
10977         }
10978
10979         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10980             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10981                                    netdev->ifindex)) ||
10982             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10983             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10984             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10985             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10986                 goto nla_put_failure;
10987
10988         genlmsg_end(msg, hdr);
10989
10990         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10991                                 NL80211_MCGRP_MLME, gfp);
10992         return;
10993
10994  nla_put_failure:
10995         genlmsg_cancel(msg, hdr);
10996         nlmsg_free(msg);
10997 }
10998 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10999
11000 void cfg80211_cqm_rssi_notify(struct net_device *dev,
11001                               enum nl80211_cqm_rssi_threshold_event rssi_event,
11002                               gfp_t gfp)
11003 {
11004         struct wireless_dev *wdev = dev->ieee80211_ptr;
11005         struct wiphy *wiphy = wdev->wiphy;
11006         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11007         struct sk_buff *msg;
11008         struct nlattr *pinfoattr;
11009         void *hdr;
11010
11011         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
11012
11013         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11014         if (!msg)
11015                 return;
11016
11017         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11018         if (!hdr) {
11019                 nlmsg_free(msg);
11020                 return;
11021         }
11022
11023         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11024             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
11025                 goto nla_put_failure;
11026
11027         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11028         if (!pinfoattr)
11029                 goto nla_put_failure;
11030
11031         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
11032                         rssi_event))
11033                 goto nla_put_failure;
11034
11035         nla_nest_end(msg, pinfoattr);
11036
11037         genlmsg_end(msg, hdr);
11038
11039         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11040                                 NL80211_MCGRP_MLME, gfp);
11041         return;
11042
11043  nla_put_failure:
11044         genlmsg_cancel(msg, hdr);
11045         nlmsg_free(msg);
11046 }
11047 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
11048
11049 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
11050                                      struct net_device *netdev, const u8 *bssid,
11051                                      const u8 *replay_ctr, gfp_t gfp)
11052 {
11053         struct sk_buff *msg;
11054         struct nlattr *rekey_attr;
11055         void *hdr;
11056
11057         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11058         if (!msg)
11059                 return;
11060
11061         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
11062         if (!hdr) {
11063                 nlmsg_free(msg);
11064                 return;
11065         }
11066
11067         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11068             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11069             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11070                 goto nla_put_failure;
11071
11072         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
11073         if (!rekey_attr)
11074                 goto nla_put_failure;
11075
11076         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
11077                     NL80211_REPLAY_CTR_LEN, replay_ctr))
11078                 goto nla_put_failure;
11079
11080         nla_nest_end(msg, rekey_attr);
11081
11082         genlmsg_end(msg, hdr);
11083
11084         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11085                                 NL80211_MCGRP_MLME, gfp);
11086         return;
11087
11088  nla_put_failure:
11089         genlmsg_cancel(msg, hdr);
11090         nlmsg_free(msg);
11091 }
11092
11093 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
11094                                const u8 *replay_ctr, gfp_t gfp)
11095 {
11096         struct wireless_dev *wdev = dev->ieee80211_ptr;
11097         struct wiphy *wiphy = wdev->wiphy;
11098         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11099
11100         trace_cfg80211_gtk_rekey_notify(dev, bssid);
11101         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
11102 }
11103 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
11104
11105 static void
11106 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
11107                                struct net_device *netdev, int index,
11108                                const u8 *bssid, bool preauth, gfp_t gfp)
11109 {
11110         struct sk_buff *msg;
11111         struct nlattr *attr;
11112         void *hdr;
11113
11114         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11115         if (!msg)
11116                 return;
11117
11118         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
11119         if (!hdr) {
11120                 nlmsg_free(msg);
11121                 return;
11122         }
11123
11124         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11125             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11126                 goto nla_put_failure;
11127
11128         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
11129         if (!attr)
11130                 goto nla_put_failure;
11131
11132         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
11133             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
11134             (preauth &&
11135              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
11136                 goto nla_put_failure;
11137
11138         nla_nest_end(msg, attr);
11139
11140         genlmsg_end(msg, hdr);
11141
11142         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11143                                 NL80211_MCGRP_MLME, gfp);
11144         return;
11145
11146  nla_put_failure:
11147         genlmsg_cancel(msg, hdr);
11148         nlmsg_free(msg);
11149 }
11150
11151 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
11152                                      const u8 *bssid, bool preauth, gfp_t gfp)
11153 {
11154         struct wireless_dev *wdev = dev->ieee80211_ptr;
11155         struct wiphy *wiphy = wdev->wiphy;
11156         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11157
11158         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
11159         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
11160 }
11161 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
11162
11163 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
11164                                      struct net_device *netdev,
11165                                      struct cfg80211_chan_def *chandef,
11166                                      gfp_t gfp)
11167 {
11168         struct sk_buff *msg;
11169         void *hdr;
11170
11171         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11172         if (!msg)
11173                 return;
11174
11175         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
11176         if (!hdr) {
11177                 nlmsg_free(msg);
11178                 return;
11179         }
11180
11181         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11182                 goto nla_put_failure;
11183
11184         if (nl80211_send_chandef(msg, chandef))
11185                 goto nla_put_failure;
11186
11187         genlmsg_end(msg, hdr);
11188
11189         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11190                                 NL80211_MCGRP_MLME, gfp);
11191         return;
11192
11193  nla_put_failure:
11194         genlmsg_cancel(msg, hdr);
11195         nlmsg_free(msg);
11196 }
11197
11198 void cfg80211_ch_switch_notify(struct net_device *dev,
11199                                struct cfg80211_chan_def *chandef)
11200 {
11201         struct wireless_dev *wdev = dev->ieee80211_ptr;
11202         struct wiphy *wiphy = wdev->wiphy;
11203         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11204
11205         ASSERT_WDEV_LOCK(wdev);
11206
11207         trace_cfg80211_ch_switch_notify(dev, chandef);
11208
11209         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11210                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11211                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
11212                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
11213                 return;
11214
11215         wdev->chandef = *chandef;
11216         wdev->preset_chandef = *chandef;
11217         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
11218 }
11219 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
11220
11221 void cfg80211_cqm_txe_notify(struct net_device *dev,
11222                              const u8 *peer, u32 num_packets,
11223                              u32 rate, u32 intvl, gfp_t gfp)
11224 {
11225         struct wireless_dev *wdev = dev->ieee80211_ptr;
11226         struct wiphy *wiphy = wdev->wiphy;
11227         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11228         struct sk_buff *msg;
11229         struct nlattr *pinfoattr;
11230         void *hdr;
11231
11232         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
11233         if (!msg)
11234                 return;
11235
11236         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11237         if (!hdr) {
11238                 nlmsg_free(msg);
11239                 return;
11240         }
11241
11242         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11243             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11244             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11245                 goto nla_put_failure;
11246
11247         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11248         if (!pinfoattr)
11249                 goto nla_put_failure;
11250
11251         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
11252                 goto nla_put_failure;
11253
11254         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
11255                 goto nla_put_failure;
11256
11257         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
11258                 goto nla_put_failure;
11259
11260         nla_nest_end(msg, pinfoattr);
11261
11262         genlmsg_end(msg, hdr);
11263
11264         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11265                                 NL80211_MCGRP_MLME, gfp);
11266         return;
11267
11268  nla_put_failure:
11269         genlmsg_cancel(msg, hdr);
11270         nlmsg_free(msg);
11271 }
11272 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
11273
11274 void
11275 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
11276                      const struct cfg80211_chan_def *chandef,
11277                      enum nl80211_radar_event event,
11278                      struct net_device *netdev, gfp_t gfp)
11279 {
11280         struct sk_buff *msg;
11281         void *hdr;
11282
11283         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11284         if (!msg)
11285                 return;
11286
11287         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
11288         if (!hdr) {
11289                 nlmsg_free(msg);
11290                 return;
11291         }
11292
11293         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
11294                 goto nla_put_failure;
11295
11296         /* NOP and radar events don't need a netdev parameter */
11297         if (netdev) {
11298                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
11299
11300                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11301                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11302                         goto nla_put_failure;
11303         }
11304
11305         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
11306                 goto nla_put_failure;
11307
11308         if (nl80211_send_chandef(msg, chandef))
11309                 goto nla_put_failure;
11310
11311         genlmsg_end(msg, hdr);
11312
11313         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11314                                 NL80211_MCGRP_MLME, gfp);
11315         return;
11316
11317  nla_put_failure:
11318         genlmsg_cancel(msg, hdr);
11319         nlmsg_free(msg);
11320 }
11321
11322 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
11323                                  const u8 *peer, u32 num_packets, gfp_t gfp)
11324 {
11325         struct wireless_dev *wdev = dev->ieee80211_ptr;
11326         struct wiphy *wiphy = wdev->wiphy;
11327         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11328         struct sk_buff *msg;
11329         struct nlattr *pinfoattr;
11330         void *hdr;
11331
11332         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
11333
11334         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11335         if (!msg)
11336                 return;
11337
11338         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11339         if (!hdr) {
11340                 nlmsg_free(msg);
11341                 return;
11342         }
11343
11344         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11345             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11346             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11347                 goto nla_put_failure;
11348
11349         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11350         if (!pinfoattr)
11351                 goto nla_put_failure;
11352
11353         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
11354                 goto nla_put_failure;
11355
11356         nla_nest_end(msg, pinfoattr);
11357
11358         genlmsg_end(msg, hdr);
11359
11360         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11361                                 NL80211_MCGRP_MLME, gfp);
11362         return;
11363
11364  nla_put_failure:
11365         genlmsg_cancel(msg, hdr);
11366         nlmsg_free(msg);
11367 }
11368 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
11369
11370 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
11371                            u64 cookie, bool acked, gfp_t gfp)
11372 {
11373         struct wireless_dev *wdev = dev->ieee80211_ptr;
11374         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11375         struct sk_buff *msg;
11376         void *hdr;
11377
11378         trace_cfg80211_probe_status(dev, addr, cookie, acked);
11379
11380         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11381
11382         if (!msg)
11383                 return;
11384
11385         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
11386         if (!hdr) {
11387                 nlmsg_free(msg);
11388                 return;
11389         }
11390
11391         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11392             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11393             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11394             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11395             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11396                 goto nla_put_failure;
11397
11398         genlmsg_end(msg, hdr);
11399
11400         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11401                                 NL80211_MCGRP_MLME, gfp);
11402         return;
11403
11404  nla_put_failure:
11405         genlmsg_cancel(msg, hdr);
11406         nlmsg_free(msg);
11407 }
11408 EXPORT_SYMBOL(cfg80211_probe_status);
11409
11410 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11411                                  const u8 *frame, size_t len,
11412                                  int freq, int sig_dbm)
11413 {
11414         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11415         struct sk_buff *msg;
11416         void *hdr;
11417         struct cfg80211_beacon_registration *reg;
11418
11419         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11420
11421         spin_lock_bh(&rdev->beacon_registrations_lock);
11422         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11423                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11424                 if (!msg) {
11425                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11426                         return;
11427                 }
11428
11429                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11430                 if (!hdr)
11431                         goto nla_put_failure;
11432
11433                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11434                     (freq &&
11435                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11436                     (sig_dbm &&
11437                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11438                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11439                         goto nla_put_failure;
11440
11441                 genlmsg_end(msg, hdr);
11442
11443                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11444         }
11445         spin_unlock_bh(&rdev->beacon_registrations_lock);
11446         return;
11447
11448  nla_put_failure:
11449         spin_unlock_bh(&rdev->beacon_registrations_lock);
11450         if (hdr)
11451                 genlmsg_cancel(msg, hdr);
11452         nlmsg_free(msg);
11453 }
11454 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11455
11456 #ifdef CONFIG_PM
11457 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11458                                    struct cfg80211_wowlan_wakeup *wakeup,
11459                                    gfp_t gfp)
11460 {
11461         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11462         struct sk_buff *msg;
11463         void *hdr;
11464         int size = 200;
11465
11466         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11467
11468         if (wakeup)
11469                 size += wakeup->packet_present_len;
11470
11471         msg = nlmsg_new(size, gfp);
11472         if (!msg)
11473                 return;
11474
11475         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11476         if (!hdr)
11477                 goto free_msg;
11478
11479         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11480             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11481                 goto free_msg;
11482
11483         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11484                                         wdev->netdev->ifindex))
11485                 goto free_msg;
11486
11487         if (wakeup) {
11488                 struct nlattr *reasons;
11489
11490                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11491                 if (!reasons)
11492                         goto free_msg;
11493
11494                 if (wakeup->disconnect &&
11495                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11496                         goto free_msg;
11497                 if (wakeup->magic_pkt &&
11498                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11499                         goto free_msg;
11500                 if (wakeup->gtk_rekey_failure &&
11501                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11502                         goto free_msg;
11503                 if (wakeup->eap_identity_req &&
11504                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11505                         goto free_msg;
11506                 if (wakeup->four_way_handshake &&
11507                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11508                         goto free_msg;
11509                 if (wakeup->rfkill_release &&
11510                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11511                         goto free_msg;
11512
11513                 if (wakeup->pattern_idx >= 0 &&
11514                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11515                                 wakeup->pattern_idx))
11516                         goto free_msg;
11517
11518                 if (wakeup->tcp_match &&
11519                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
11520                         goto free_msg;
11521
11522                 if (wakeup->tcp_connlost &&
11523                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
11524                         goto free_msg;
11525
11526                 if (wakeup->tcp_nomoretokens &&
11527                     nla_put_flag(msg,
11528                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
11529                         goto free_msg;
11530
11531                 if (wakeup->packet) {
11532                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11533                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11534
11535                         if (!wakeup->packet_80211) {
11536                                 pkt_attr =
11537                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11538                                 len_attr =
11539                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11540                         }
11541
11542                         if (wakeup->packet_len &&
11543                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11544                                 goto free_msg;
11545
11546                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11547                                     wakeup->packet))
11548                                 goto free_msg;
11549                 }
11550
11551                 nla_nest_end(msg, reasons);
11552         }
11553
11554         genlmsg_end(msg, hdr);
11555
11556         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11557                                 NL80211_MCGRP_MLME, gfp);
11558         return;
11559
11560  free_msg:
11561         nlmsg_free(msg);
11562 }
11563 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11564 #endif
11565
11566 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11567                                 enum nl80211_tdls_operation oper,
11568                                 u16 reason_code, gfp_t gfp)
11569 {
11570         struct wireless_dev *wdev = dev->ieee80211_ptr;
11571         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11572         struct sk_buff *msg;
11573         void *hdr;
11574
11575         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11576                                          reason_code);
11577
11578         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11579         if (!msg)
11580                 return;
11581
11582         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11583         if (!hdr) {
11584                 nlmsg_free(msg);
11585                 return;
11586         }
11587
11588         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11589             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11590             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11591             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11592             (reason_code > 0 &&
11593              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11594                 goto nla_put_failure;
11595
11596         genlmsg_end(msg, hdr);
11597
11598         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11599                                 NL80211_MCGRP_MLME, gfp);
11600         return;
11601
11602  nla_put_failure:
11603         genlmsg_cancel(msg, hdr);
11604         nlmsg_free(msg);
11605 }
11606 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11607
11608 static int nl80211_netlink_notify(struct notifier_block * nb,
11609                                   unsigned long state,
11610                                   void *_notify)
11611 {
11612         struct netlink_notify *notify = _notify;
11613         struct cfg80211_registered_device *rdev;
11614         struct wireless_dev *wdev;
11615         struct cfg80211_beacon_registration *reg, *tmp;
11616
11617         if (state != NETLINK_URELEASE)
11618                 return NOTIFY_DONE;
11619
11620         rcu_read_lock();
11621
11622         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11623                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
11624                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11625
11626                 spin_lock_bh(&rdev->beacon_registrations_lock);
11627                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11628                                          list) {
11629                         if (reg->nlportid == notify->portid) {
11630                                 list_del(&reg->list);
11631                                 kfree(reg);
11632                                 break;
11633                         }
11634                 }
11635                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11636         }
11637
11638         rcu_read_unlock();
11639
11640         return NOTIFY_DONE;
11641 }
11642
11643 static struct notifier_block nl80211_netlink_notifier = {
11644         .notifier_call = nl80211_netlink_notify,
11645 };
11646
11647 void cfg80211_ft_event(struct net_device *netdev,
11648                        struct cfg80211_ft_event_params *ft_event)
11649 {
11650         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11651         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11652         struct sk_buff *msg;
11653         void *hdr;
11654
11655         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11656
11657         if (!ft_event->target_ap)
11658                 return;
11659
11660         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11661         if (!msg)
11662                 return;
11663
11664         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11665         if (!hdr)
11666                 goto out;
11667
11668         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11669             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11670             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
11671                 goto out;
11672
11673         if (ft_event->ies &&
11674             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
11675                 goto out;
11676         if (ft_event->ric_ies &&
11677             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11678                     ft_event->ric_ies))
11679                 goto out;
11680
11681         genlmsg_end(msg, hdr);
11682
11683         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11684                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11685         return;
11686  out:
11687         nlmsg_free(msg);
11688 }
11689 EXPORT_SYMBOL(cfg80211_ft_event);
11690
11691 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11692 {
11693         struct cfg80211_registered_device *rdev;
11694         struct sk_buff *msg;
11695         void *hdr;
11696         u32 nlportid;
11697
11698         rdev = wiphy_to_dev(wdev->wiphy);
11699         if (!rdev->crit_proto_nlportid)
11700                 return;
11701
11702         nlportid = rdev->crit_proto_nlportid;
11703         rdev->crit_proto_nlportid = 0;
11704
11705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11706         if (!msg)
11707                 return;
11708
11709         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11710         if (!hdr)
11711                 goto nla_put_failure;
11712
11713         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11714             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11715                 goto nla_put_failure;
11716
11717         genlmsg_end(msg, hdr);
11718
11719         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11720         return;
11721
11722  nla_put_failure:
11723         if (hdr)
11724                 genlmsg_cancel(msg, hdr);
11725         nlmsg_free(msg);
11726
11727 }
11728 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11729
11730 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
11731 {
11732         struct wiphy *wiphy = wdev->wiphy;
11733         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11734         struct sk_buff *msg;
11735         void *hdr;
11736
11737         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11738         if (!msg)
11739                 return;
11740
11741         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
11742         if (!hdr)
11743                 goto out;
11744
11745         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11746             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
11747             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11748                 goto out;
11749
11750         genlmsg_end(msg, hdr);
11751
11752         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
11753                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11754         return;
11755  out:
11756         nlmsg_free(msg);
11757 }
11758
11759 /* initialisation/exit functions */
11760
11761 int nl80211_init(void)
11762 {
11763         int err;
11764
11765         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
11766                                                    nl80211_mcgrps);
11767         if (err)
11768                 return err;
11769
11770         err = netlink_register_notifier(&nl80211_netlink_notifier);
11771         if (err)
11772                 goto err_out;
11773
11774         return 0;
11775  err_out:
11776         genl_unregister_family(&nl80211_fam);
11777         return err;
11778 }
11779
11780 void nl80211_exit(void)
11781 {
11782         netlink_unregister_notifier(&nl80211_netlink_notifier);
11783         genl_unregister_family(&nl80211_fam);
11784 }